TWI892798B - Bed frame and crib - Google Patents

Abstract

The present application relates to a bed frame and a crib. The bed frame includes: a first column; a second column disposed parallel to the first column; and an armrest tube mechanism movably connected between the first column and the second column. The armrest tube mechanism is switchable between an unfolded position and a folded position. When the armrest tube mechanism is in the unfolded position, the armrest tube mechanism is at least partially parallel to a horizontal plane.

Description

Bed frames and cribs

This application relates to the field of furniture technology, and in particular to a bed frame and a children's bed.

Cribs are primarily used to provide a place for children to rest or play. To facilitate storage or transportation, cribs are often designed to be foldable to reduce their size. Typically, a crib consists of upright posts and multiple foldable armrests connected between the posts. These armrests are pivotally connected, pivoting toward each other and moving the upright posts toward each other, allowing the crib to fold. However, due to structural limitations, commonly used armrests can leave their upper surfaces uneven after pivoting. This can easily cause crib covers to sit loosely on top of the posts, resulting in an untidy appearance.

Furthermore, to facilitate rest for smaller infants, cribs currently on the market often incorporate a hammock. To ensure a flat mattress for greater comfort, hammocks typically include a support structure that folds up with the crib. However, the support structure of current cribs still remains relatively bulky when folded, making it difficult to store and transport.

According to various embodiments of the present application, a bed frame, a hammock, and a crib are provided.

In one aspect, the present application provides a bed frame comprising: a first upright post; a second upright post disposed opposite the first upright post; and an armrest tube mechanism movably connected between the first upright post and the second upright post, the armrest tube mechanism being switchable between an extended position and a retracted position. When the armrest tube mechanism is in the extended position, at least a portion of the armrest tube mechanism is parallel to a horizontal plane.

In one embodiment, the handrail tube mechanism includes a first handrail tube assembly, the first handrail tube assembly including a first handrail tube having a first pivot end and a first sliding end. The first pivot end is pivotally connected to one of the first column and the second column, and the first sliding end is pivotally and slidably connected to the other of the second column and the first column. When the handrail tube mechanism is in the deployed position, the first column and the second column are spaced apart from each other, and the corresponding first handrail tube is at least partially parallel to a horizontal plane.

In one embodiment, the first handrail tube includes a first tube segment and a second tube segment connected to each other and arranged at an angle. The first end of the first tube segment distal to the second tube segment is the first pivot end, and the second tube segment distal to the first end of the first tube segment is the first sliding end. When the handrail tube mechanism is in the deployed position, the first tube segment is parallel to a horizontal plane, and the second tube segment extends downward from the second end of the first tube segment.

In one embodiment, the angle between the first tube segment and the second tube segment is greater than 90°.

In one embodiment, the angle between the first tube segment and the second tube segment is 150°.

In one embodiment, the first handrail tube assembly includes two first handrail tubes, wherein the first pivot end of one of the first handrail tubes is pivotally connected to the first column, and the first sliding end of one of the first handrail tubes is pivotally and slidably connected to the second column. The first pivot end of another first handrail tube is pivotally connected to the second column, and the first sliding end of another first handrail tube is slidably pivotally connected to the first column. When the handrail tube mechanism is in the deployed position, the two first handrail tubes are arranged horizontally side by side, and the projections of the first tube sections of the two first handrail tubes onto a vertical plane parallel to the extension direction of the first tube sections and perpendicular to the horizontal plane at least partially overlap.

In one embodiment, the first handrail tube assembly further includes a rotating connection mechanism, and the two first handrail tubes are pivotally connected via the rotating connection mechanism.

In one embodiment, the rotatable connection mechanism includes two rotatable members, each of which has a first connection portion and a second connection portion. Each first handrail tube is connected to the first connection portion of each rotatable member, and the two second connection portions are rotatably connected.

In one embodiment, the rotating member includes a first clamping plate, a connecting plate, and a second clamping plate. The connecting plate is connected between the first clamping plate and the second clamping plate to form a retaining groove. The first clamping plate and the second clamping plate are each provided with a first connecting portion and a second connecting portion, with the first connecting portion being closer to the notch of the retaining groove than the second connecting portion. The first handrail tube is positioned within the retaining groove and connected to the two first connecting portions.

In one embodiment, the rotating member further includes a reinforcing rib. Both the first clamping plate and the second clamping plate are provided with the reinforcing rib. The reinforcing rib on the first clamping plate extends toward the second clamping plate, and the reinforcing rib on the second clamping plate extends toward the first clamping plate.

In one embodiment, the rotating connection mechanism includes two rotating connection parts, each of which includes a clamping plate and a connecting column fixed to the clamping plate. The clamping plate is provided with a first connecting portion. The two first handrail tubes are respectively connected to the first connecting portions of the two rotating connection parts and are pivotally connected via the connecting columns of the two rotating connection parts.

In one embodiment, the clamping plates of the two rotating connecting parts and the connecting posts of the two rotating connecting parts enclose a retaining groove, and the two first handrail tubes are restrained in the retaining groove and connected to the corresponding first connecting parts.

In one embodiment, the rotatable connection mechanism is connected to the first tube sections of two first handrail tubes, and when the handrail tube mechanism is in the deployed position, the rotatable connection mechanism is located below each of the first tube sections.

In one embodiment, at least one of the first handrail tubes is provided with a first protective assembly, located at the pivot point between the two first handrail tubes. When the handrail tube mechanism switches from the extended position to the retracted position, the two first handrail tubes pivot relative to the rotating connection mechanism and, together with the rotating connection mechanism, form a first shearing trap. The first protective assembly is used to shield the first shearing trap.

In one embodiment, the first protective assembly includes a first protective baffle and a first protective connector. The first protective baffle is used to shield the first shearing zone, and the first protective connector is fixed to a side edge of the first protective baffle and is used to connect to the first handrail tube.

In one embodiment, a first arcuate concave surface is provided on a side of the first protective connector facing away from the first protective baffle, capable of conforming to the outer wall of the first handrail tube.

In one embodiment, the bed frame further includes top corners, and the top corners are provided on both the first column and the second column. Each top corner has a first pivot portion, and the first pivot portion is used to pivot with the first pivot end.

In one embodiment, the bed frame further includes a sliding member, and the sliding member is slidably provided on both the first column and the second column. Each sliding member is provided with a second pivot portion, and the second pivot portion is used to pivot with the first sliding end.

In one embodiment, the top corner is provided with a locking mechanism. When the handrail tube mechanism is in the extended position, the locking mechanism can engage with the sliding member to restrict the sliding movement of the sliding member relative to the column.

In one embodiment, the locking mechanism includes a locking member and a reset member pivotally connected to the top corner. The locking member has an operating end and a locking end, and the sliding member is provided with a locking engagement portion. The locking member is pivotable between a locked position and a released position. When the locking member is in the locked position, the locking end is engageable with the locking engagement portion, and when the locking member is in the released position, the locking end is disengaged from the locking engagement portion. The operating end is operable to pivot the locking member from the locked position to the released position, and the reset member is configured to bias the operating end to cause the locking member to pivot toward the locked position.

In one embodiment, the handrail tube mechanism includes a second handrail tube assembly, comprising a second handrail tube and a third handrail tube, with two second handrail tubes and two third handrail tubes each provided. Each second handrail tube has a second pivot end and a second sliding end, the two second pivot ends pivotally connected, and the two second sliding ends are slidably mounted on the first and second upright posts, respectively, and pivotally connected to the first and second upright posts. Each third handrail tube has a third pivot end and a fourth pivot end, the two third pivot ends pivotally connected, and the two fourth pivot ends pivotally connected to the first and second upright posts, respectively. When the handrail tube mechanism is in the deployed position, at least a portion of each second handrail tube and at least a portion of each third handrail tube are parallel to a horizontal plane.

In one embodiment, the second handrail tube includes a third tube segment and a fourth tube segment connected and arranged at an angle. The first end of the third tube segment distal to the fourth tube segment serves as the second pivot end, and the first end of the fourth tube segment distal to the third tube segment serves as the second sliding end. The third handrail tube includes a fifth tube segment and a sixth tube segment connected and arranged at an angle. The first end of the fifth tube segment distal to the sixth tube segment serves as the fourth pivot end, and the first end of the sixth tube segment distal to the fifth tube segment serves as the third pivot end. When the handrail tube mechanism is in the deployed position, the third tube segments and the fifth tube segments are located in the same horizontal plane, the fourth tube segment extends downward from the second end of the third tube segment, and the sixth tube segment extends downward from the second end of the fifth tube segment. The second handrail tube and the third handrail tube connected to the first column or the second column are arranged horizontally side by side, and the projections of the fifth tube segment and the third tube segment on a vertical plane parallel to the extension direction of the fifth tube segment and the third tube segment and perpendicular to the horizontal plane overlap.

In one embodiment, the second handrail tube connected to the first column or the second column is pivotally connected to the third handrail tube.

In one embodiment, the bed frame further includes a second protective assembly, which is disposed on each of the second handrail tubes and/or the third handrail tubes and located at the pivotal connection between the second and third handrail tubes connected to the first or second upright posts. When the handrail tube mechanism switches from the extended position to the retracted position, the second and third handrail tubes connected to the first or second upright posts pivot relative to each other and, together with the pivotal connection between the second and third handrail tubes connected to the first or second upright posts, form a second shear-clamping zone. The second protective assembly is used to shield the second shear-clamping zone.

In one embodiment, when the second protective assembly is installed on each of the third handrail tubes, the second protective assembly extends from the fifth tube segment to the sixth tube segment. When the handrail tube mechanism switches from the extended position to the retracted position, the two sixth tube segments pivot relative to each other and enclose a third shearing zone. The second protective assembly also serves to shield the third shearing zone.

In one embodiment, the second protective assembly includes a second protective baffle and a second protective connector. The second protective baffle is used to shield the second shearing zone. The second protective connector is fixed to a side edge of the second protective baffle and is used to connect to the second handrail tube and/or the third handrail tube.

In one embodiment, a second curved concave surface is provided on a side of the second protective connector facing away from the second protective baffle, which is adapted to mate with the outer wall of the second handrail tube and/or the third handrail tube.

In one embodiment, the handrail tube mechanism includes a second handrail tube assembly, the second handrail tube assembly including two second handrail tubes, each second handrail tube having a second pivot end and a second sliding end, the two second pivot ends being pivotally connected, and the two second sliding ends being slidably disposed on the first column and the second column, respectively, and pivotally connected to the first column and the second column. When the handrail tube mechanism is in the deployed position, at least a portion of each second handrail tube is parallel to a horizontal plane.

In one embodiment, the second handrail tube includes a third tube segment and a fourth tube segment connected and arranged at an angle. The first end of the third tube segment distal to the fourth tube segment serves as the second pivot end, and the first end of the fourth tube segment distal to the third tube segment serves as the second sliding end. When the handrail tube mechanism is in the deployed position, each of the third tube segments is parallel to a horizontal plane, and the fourth tube segment extends downward from the second end of the third tube segment.

In one embodiment, the handrail tube mechanism includes a second handrail tube assembly, which includes two third handrail tubes. Each of the third handrail tubes has a third pivot end and a fourth pivot end. The two third pivot ends are pivotally connected to each other, and the two fourth pivot ends are pivotally connected to the first column and the second column, respectively. When the handrail tube mechanism is in the deployed position, at least a portion of each third handrail tube is parallel to the horizontal plane.

In one embodiment, the third handrail tube includes a fifth tube segment and a sixth tube segment connected and arranged at an angle. The first end of the fifth tube segment distal to the sixth tube segment serves as the fourth pivot end, and the first end of the sixth tube segment distal to the fifth tube segment serves as the third pivot end. When the handrail tube mechanism is in the deployed position, each of the fifth tube segments is parallel to a horizontal plane, and the sixth tube segment extends downward from the second end of the fifth tube segment.

In another aspect, the present application provides a bed frame comprising: a plurality of upright posts spaced circumferentially; and a plurality of armrest tube mechanisms, wherein the armrest tube mechanisms are movably connected between two adjacent upright posts. The armrest tube mechanisms are switchable between an extended position and a retracted position, thereby enabling the bed frame to be switched between an extended state and a retracted state. When the armrest tube mechanisms are in the extended position, the armrest tube mechanisms are at least partially parallel to a horizontal plane. When the bed frame is in the extended state, the upright posts are spaced apart from each other; when the bed frame is in the retracted state, the upright posts are retracted into each other.

In one embodiment, the handrail tube mechanism includes at least one of a first handrail tube assembly and a second handrail tube assembly. The first handrail tube assembly includes a first handrail tube having a first pivot end and a first sliding end. The first pivot end is pivotally connected to one of the two adjacent uprights, and the first sliding end is pivotally and slidably connected to the other of the two adjacent uprights. When the bed frame is in the unfolded state, the two adjacent uprights are spaced apart from each other, and at least a portion of the corresponding first handrail tube is parallel to a horizontal plane. The second handrail tube assembly includes a second handrail tube and a third handrail tube, with two second handrail tubes and two third handrail tubes each provided. Each second handrail tube has a second pivot end and a second sliding end, the two second pivot ends pivotally connected to each other, and the two second sliding ends are slidably mounted on two adjacent upright posts and pivotally connected to the corresponding upright posts. Each third handrail tube has a third pivot end and a fourth pivot end, the two third pivot ends pivotally connected to each other, and the two fourth pivot ends pivotally connected to two adjacent upright posts. When the bed frame is in the unfolded state, at least a portion of each second handrail tube and at least a portion of each third handrail tube are parallel to a horizontal plane.

On the other hand, the present application provides a bed frame, comprising: a plurality of columns, arranged at intervals along the circumferential direction; a plurality of handrail tube mechanisms, wherein one handrail tube mechanism is movably connected between every two adjacent columns, the handrail tube mechanism comprising at least one pair of handrail tubes, the pair of handrail tubes comprising two handrail tubes, the two handrail tubes being crossed and pivoted with each other, each handrail tube mechanism being switchable between an extended position and a retracted position so that the bed frame can be switched between an extended state and a retracted state; and a plurality of protective components, each pair of handrail tubes being provided with the protective component, and the protective component being mounted on at least one of the handrail tubes and located at the pivot point of the two handrail tubes. When each handrail tube mechanism switches between the extended position and the retracted position, each protective assembly is used to shield a shearing pinching area formed between two of the corresponding pair of handrail tubes.

In another aspect, the present application provides a crib, comprising a crib cover and a bed frame according to any of the aforementioned embodiments.

In one embodiment, the crib cover includes a bottom support plate, and an operating member is provided on the bottom support plate. The operating member can be operated to switch the crib frame from the expanded state to the collapsed state.

In one embodiment, the crib further includes a hammock, which is detachably connected to the bed frame and has an operating port disposed opposite to the operating member.

In another aspect, the present application provides a crib comprising a bed frame having a top frame and a hammock. The hammock comprises a hammock covering and a support assembly connected to the hammock covering. The support assembly comprises a pivot and multiple support tube assemblies circumferentially pivoted to the pivot, each of the support tube assemblies comprising multiple tube segments. The hammock is mounted within the bed frame. The crib is switchable between an expanded and collapsed position. When the crib is in the collapsed position, the collapsed height of the support assembly is lower than the highest point of the top frame.

In one embodiment, each of the support tube assemblies includes an inner support tube and an outer support tube slidably mounted on the outer support tube. When the crib is in an expanded state, the inner support tube at least partially extends out of the outer support tube. When the crib is in a collapsed state, the inner support tube retracts within the outer support tube.

In one embodiment, the hammock cover includes a bottom cover, and the end of each supporting outer tube is connected to the bottom cover. The length of the supporting outer tube is less than or equal to the vertical distance from the bottom cover to the highest point of the top frame when the crib is in the unfolded state.

In one embodiment, the hammock covering includes a bottom covering, the bottom covering is provided with a plurality of sleeves, and the plurality of supporting outer tubes are respectively inserted and fixed in the plurality of sleeves.

In one embodiment, the length of the supporting outer tube is equal to the length of the sleeve.

In one embodiment, the crib further includes a plurality of upright posts for supporting the top side frame. When the crib is in the unfolded state, the length of each supporting tube assembly is less than the length of each upright post.

In another aspect, the present application provides a crib comprising: a bottom support plate having an operating member disposed thereon; and a hammock comprising a support assembly, the support assembly comprising a pivot seat and a plurality of support tube assemblies circumferentially pivoted to the pivot seat. The hammock is installed within the crib and is switchable between an expanded state and a collapsed state. During the transition from the expanded state to the collapsed state, the operating member is pulled upward to cause the pivot seat and the plurality of support tube assemblies to pivot relative to each other.

In one embodiment, the hammock further includes a bottom covering positioned above the bottom support plate, the plurality of support tube assemblies being connected to the bottom covering, the bottom covering having a first opening, and the pivot having a second opening, wherein the first opening, the second opening, and the operating member are disposed opposite each other.

In one embodiment, the operating member is a pull ring connected to the bottom support plate.

In one embodiment, the crib further includes a top frame located above the bottom support piece. When the crib is in a folded state, the folded height of the support assembly is lower than the highest point of the top frame.

In one embodiment, each support tube assembly includes an inner support tube and an outer support tube slidably mounted on the outer support tube. When the crib is in the expanded state, the inner support tube at least partially extends beyond the outer support tube. When the crib is in the collapsed state, the inner support tube retracts within the outer support tube.

In one embodiment, the crib further includes a top frame located above the bottom support sheet, the hammock includes a bottom covering, and the end of each of the supporting outer tubes is connected to the bottom covering. The length of the supporting outer tube is less than or equal to the vertical distance from the bottom covering to the highest point of the top frame when the crib is in the unfolded state.

In one embodiment, the hammock covering includes a bottom covering, the bottom covering is provided with a plurality of sleeves, and the plurality of supporting outer tubes are respectively inserted and fixed in the plurality of sleeves.

In one embodiment, the crib further includes a top frame located above the bottom support plate and a plurality of upright posts for supporting the top frame. When the hammock is in the unfolded state, the length of each support tube assembly is less than the length of each upright post.

In another aspect, the present application provides a hammock comprising: a hammock cover; and a support assembly comprising a pivot seat and a plurality of support tube assemblies circumferentially pivoted to the pivot seat, each support tube assembly comprising an inner support tube and an outer support tube slidably sleeved over the inner support tube. The plurality of support tube assemblies are connected to the hammock cover, and the hammock is switchable between an expanded state and a collapsed state. When the hammock is in the expanded state, the inner support tubes at least partially extend beyond the outer support tubes, and when the hammock is in the collapsed state, the inner support tubes are retracted within the outer support tubes.

In one embodiment, each of the inner support tubes has a first end and a second end, and each of the outer support tubes has a third end and a fourth end. Each first end is pivotally connected to the pivot seat, each second end is inserted into the outer support tube via the corresponding third end for sliding engagement with the outer support tube, and each fourth end is connected to the hammock covering.

In one embodiment, the hammock covering includes a bottom covering, the bottom covering is provided with a plurality of sleeves, and the plurality of supporting outer tubes are respectively inserted and fixed in the plurality of sleeves.

In one embodiment, the length of the supporting outer tube is equal to the length of the sleeve.

In one embodiment, the support assembly further includes an anti-contact assembly, comprising a first anti-contact member disposed on the support inner tube and a second anti-contact member disposed on the support outer tube. The first anti-contact member and the second anti-contact member are at least partially located between the support inner tube and the support outer tube.

In one embodiment, the first end of the inner support tube is inserted into the outer support tube via the third end of the outer support tube and is slidably connected to the outer support tube. The first end of the inner support tube is provided with the first contact prevention member, and the third end of the outer support tube is provided with the second contact prevention member.

In one embodiment, the first contact protection member includes a first engaging finger, the supporting inner tube includes a first engaging hole, the first contact protection member is inserted into the supporting inner tube, the first engaging finger engages with the first engaging hole, and the first contact protection member is at least partially located outside the supporting inner tube. The second contact protection member includes a second engaging finger, the supporting outer tube includes a second engaging hole, the second contact protection member is inserted into the supporting outer tube, the second engaging finger engages with the second engaging hole, and the second contact protection member is at least partially located outside the supporting outer tube.

In one embodiment, when the hammock is in the unfolded state, the support tube assembly is in an extended state, and when the hammock is in the folded state, the support tube assembly is in a shortened state. When the support tube assembly is in the extended state, the first anti-contact member and the second anti-contact member abut against each other to limit the position.

In another aspect, the present application provides a children's bed, comprising a bed frame and a hammock as described in any of the above embodiments.

1000: Children's bed

10: Bed frame

110: Pillar

111: First pillar

112: Second pillar

113: Third Pillar

114: Fourth Pillar

120: Handrail tube mechanism

121: First handrail tube group

122: First handrail tube

1221A: First hub terminal

1221B: First sliding end

1222: First Pipe Section

1223: Second Pipe Section

123: Rotating connection mechanism

1231: Rotating parts

12311: First connection

12312: Second connection

12313: First clamp

12314:Connector Plate

12315: Second clamping plate

12316: Card slot

12317: Strengthen the muscles

1232: Rotating connection part

12321: Clamp

12322: Connecting column

124: Second handrail tube set

125: Second handrail tube

1251A: Second hub terminal

1251B: Second sliding end

1252: Third Pipe Section

1253: Fourth Pipe Section

126: Third handrail tube

1261A: Third hub terminal

1261B: Fourth terminal

1262: Fifth Pipe Section

1263: Sixth Pipe Section

127: First shear clamping area

128: Second shear clamping area

129: Third shear clamping zone

130: Top corner

Q1: First joint

131: First top corner

132: Second top corner

133: Support seat

134: Mounting seat

140: Sliding piece

Q2: Second joint

141: First sliding part

142: Second sliding part

143: Locking fitting

150: Locking mechanism

151: Locking piece

1511: Operation terminal

1512: Locking terminal

152: Reset

153:Button

160: First protective component

161: First protective shield

162: First protective connector

1621: First curved concave surface

1622: First connection hole

170: Second protective component

171: Second protective shield

1711: First Plate

1712: Second Plate

1713: Arc-shaped groove

172: Second protective connector

1721: Second curved concave surface

1722: Second connection hole

180: Third protection component

181: Third protective shield

1110: Top border

1200: Children's crib cover

1210: Bottom support plate

1220: Lateral support

1230: Protective parts

1300: Operating parts

200: Hammock

201: Operation port

210: Hammock Cover

211: Bottom covering

212: Side covering

2111: First opening

2112: Sleeve

2113: Fasteners

220: Support assembly

221: Transposition

2211: Second opening

2212: First Side

2213: Side 2

2214: Hub assembly

2214a: Pivot

222: Support tube assembly

2221: Support inner tube

2221a: First End

2221b: Second end

2221c: First engagement hole

2222: Support outer tube

2222a: The Third End

2222b: The Fourth End

2222c: Second engagement hole

223: Anti-contact components

2231: First contact shield

2231a: First Plug-in Section

2231b: First abutment portion

2231c: First engaging finger

2232: Secondary contact protection element

2232a: Second plug-in unit

2232b: Second abutment portion

2232c: Second engaging finger

224: End cap

230: Accommodation chamber

240: Zipper

300: Mattress

310: Ribbon

The accompanying drawings, which constitute part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application.

To more clearly illustrate the technical solutions in the embodiments of this application, the following briefly introduces the figures required for describing the embodiments. Obviously, the figures described below only illustrate some embodiments of this application. A person skilled in the art can derive other figures based on these figures without inventive effort.

In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of various components in the drawings are drawn only as examples and are not necessarily drawn in true scale. In the accompanying drawings: Figure 1 schematically shows a top view of a crib in an embodiment of the present application, and the crib is in an unfolded state; Figure 2 schematically shows a side view of the crib shown in Figure 1; Figure 3 schematically shows a top view of the crib shown in Figure 1 in a state between the unfolded state and the folded state; Figure 4 schematically shows a top view of the crib shown in Figure 1 in a folded state; Figure 5 schematically shows a three-dimensional view of a bed frame provided according to the first embodiment of the present application and an enlarged view of the circular dotted frame portion; Figure 6 schematically shows a partial structure of the bed frame shown in Figure 5, wherein the first armrest tube group is in the unfolded position; Figure 7 schematically shows a three-dimensional view of the first armrest tube group and the rotating connection mechanism shown in Figure 6; Figure 8 schematically shows a partial structure of the bed frame shown in Figure 5, wherein the first armrest tube group is in the folded position; Figure 9 FIG10 schematically shows a U1-U1 cross-sectional view of FIG5; FIG11 schematically shows a perspective view of a rotating member; FIG12 schematically shows a side view of the rotating connecting mechanism; FIG13 schematically shows another perspective view of a bed frame according to the first embodiment of the present application, wherein the bed frame includes a first protective assembly; FIG14 schematically shows the bed frame shown in FIG13, wherein the first armrest tube assembly is in a retracted position; FIG15 schematically shows a perspective view of the first protective assembly in the bed frame shown in FIG13; FIG16 schematically shows a perspective view of a bed frame according to the second embodiment of the present application and an enlarged view of the circular dotted frame portion; FIG17 schematically shows a partial structure of the bed frame shown in FIG16, wherein the second armrest tube assembly is in an extended position; FIG18 schematically shows FIG16 shows a perspective view of the second armrest tube assembly and the rotating connection mechanism; FIG19 schematically shows a partial structure of the bed frame shown in FIG16, wherein the second armrest tube assembly is in a retracted position; FIG20 schematically shows another schematic view of the bed frame provided according to the second embodiment of the present application, wherein the bed frame includes a second protective assembly and the second armrest tube assembly is in an extended position; FIG21 schematically shows the bed frame shown in FIG20, wherein the second armrest tube assembly is in a transition position between the extended position and the retracted position; FIG22 schematically shows the bed frame shown in FIG20, wherein the second armrest tube assembly is in a retracted position; FIG23 schematically shows a perspective view of the second protective assembly in the bed frame shown in FIG20; FIG24 schematically shows another schematic view of the bed frame provided according to the second embodiment of the present application, wherein the bed frame includes a second protective assembly of another structure. 25 schematically shows the bed frame shown in FIG24 , wherein the second armrest tube group is in a transition position between the deployed position and the folded position; FIG26 schematically shows the bed frame shown in FIG24 , wherein the second armrest tube group is in the folded position; FIG27 schematically shows a three-dimensional view of the second guard assembly in the bed frame shown in FIG24 ; FIG28 schematically shows a three-dimensional view of the second guard assembly in the bed frame shown in FIG24 from another perspective; FIG29 schematically shows a three-dimensional view of a bed frame provided according to the third embodiment of the present application and an enlarged view of the circular dotted frame portion; FIG30 schematically shows another three-dimensional view of the bed frame provided according to the third embodiment of the present application, wherein the bed frame includes a first guard assembly and a second guard assembly; FIG31 schematically shows a three-dimensional view of the bed frame provided according to the third embodiment of the present application Another perspective view of a bed frame, wherein the bed frame includes a first protective assembly and a second protective assembly of another structure; FIG32 schematically illustrates the U2-U2 cross-sectional view of FIG31; FIG33 schematically illustrates a partial structural view of a bed frame provided according to the fourth embodiment of the present application, wherein the first armrest tube assembly is in an extended position; FIG34 schematically illustrates another partial structural view of a bed frame provided according to the fourth embodiment of the present application, wherein the first armrest tube assembly is in a retracted position; FIG35 schematically illustrates the bed frame shown in FIG33, including the protective assembly; FIG36 schematically illustrates the bed frame shown in FIG34, including the protective assembly; FIG37 schematically illustrates a partial structural view of a bed frame provided according to the fifth embodiment of the present application, wherein the second armrest tube assembly is in an extended position; FIG38 Another schematic diagram of a partial structure of a bed frame provided according to the fifth embodiment of the present application is schematically shown, wherein the second armrest tube group is in the folded position; Figure 39 schematically shows the bed frame shown in Figure 37, which includes a protective assembly; Figure 40 schematically shows the bed frame shown in Figure 38, which includes a protective assembly; Figure 41 is a structural schematic diagram of the crib described in an embodiment of the present application and an enlarged view of the part circled by a dotted line; Figure 42 is a structural schematic diagram of the bed frame and the support assembly in the crib shown in Figure 41; Figure 43 is a structural schematic diagram of the hammock in the crib shown in Figure 41; Figure 44 is a schematic diagram of the connection structure between the support outer tube and the sleeve in the hammock shown in Figure 43; Figure 45 is a structural schematic diagram of the support assembly in the hammock shown in Figure 43, at this time the support tube groups in the support assembly are all in an extended state. FIG46 is a structural diagram of the support assembly shown in FIG45 from another perspective; FIG47 is a structural diagram of the support assembly in the hammock shown in FIG43, at which time the support tube groups in the support assembly are in an intermediate state between the extended state and the shortened state; FIG48 is a structural diagram of the support assembly in the hammock shown in FIG43, at which time the support tube groups in the support assembly are in an extended state and pivoted. to be approximately located below the pivot seat; FIG49 is a structural diagram of the support assembly in the hammock shown in FIG43, at which time the support tube groups in the support assembly are in an intermediate state between the extended state and the shortened state and pivot to be approximately located below the pivot seat; FIG50 is a structural diagram of the support assembly in the hammock shown in FIG43, at which time the support tube groups in the support assembly are in a shortened state and pivot to be approximately located below the pivot seat Below the pivot seat; Figure 51 is a cross-sectional view of one of the support tube assemblies of the support assembly shown in Figure 47 and an enlarged view of the portion circled in dotted lines; Figure 52 is a cross-sectional view of one of the support tube assemblies of the support assembly shown in Figure 45 and an enlarged view of the portion circled in dotted lines; Figure 53 is a schematic structural diagram of the support assembly shown in Figure 45 from another perspective and an enlarged view of the portion circled in dotted lines; Figure 54 is a schematic structural diagram of the support assembly shown in Figure 53. FIG55 is a schematic structural diagram of a first anti-contact member in the support assembly shown in FIG53; FIG56 is a schematic structural diagram of the crib shown in FIG41 in a semi-folded state; FIG57 is a schematic structural diagram of the crib shown in FIG41 in a folded state; and FIG58 is a schematic structural diagram of the crib shown in FIG57 after being wrapped and secured by a mattress.

To make the above-mentioned purposes, features, and advantages of this application more clearly understood, the following detailed description of specific embodiments of this application is provided with reference to the accompanying figures. The following description provides numerous specific details to facilitate a thorough understanding of this application. However, this application can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

Figures 1 to 4 schematically illustrate a crib 1000 according to an embodiment of the present application. Crib 1000 is primarily used to provide a place for children or infants to rest or play. Specifically, crib 1000 has a generally rectangular frame structure, comprising a bed frame 10 (see Figures 5, 13, or 17) and a crib cover 1200 (e.g., a fabric cover, see Figures 1 to 4) disposed over the bed frame 10. The bed frame 10 is foldable, allowing crib 1000 to be switched between an extended and collapsed position. When folded, crib 1000 has a relatively small footprint, making it easy to store and transport.

Figure 5 shows a perspective view of a bed frame 10 according to the first embodiment of the present application. The bed frame 10 includes a first column 111, a second column 112, and an armrest tube mechanism 120. The second column 112 is disposed opposite the first column 111. The armrest tube mechanism 120 is movably connected between the first column 111 and the second column 112 and is switchable between an extended position (see Figures 5 and 6) and a retracted position (see Figure 8). When in the extended position, the armrest tube mechanism 120 is at least partially parallel to a horizontal plane.

The bed frame 10 described above can have an extended position and a retracted position by movably connecting the armrest tube mechanism 120 between the first column 111 and the second column 112. When the armrest tube mechanism 120 is in the retracted position, the entire bed frame 10 can be retracted, thereby reducing the size of the bed frame 10 for easier storage and transportation. Because the armrest tube mechanism 120 is at least partially parallel to the horizontal plane when in the extended position, the crib cover 1200 (e.g., a fabric cover) mounted on the armrest tube mechanism 120 lies flat when the armrest tube mechanism 120 is in the extended position, providing a better fit with the armrest tube mechanism 120. This, in turn, gives the bed frame 10 covered with the crib cover 1200 a neater appearance.

In some embodiments, multiple first columns 111 and multiple second columns 112 are provided, alternating circumferentially with each other. A handrail tube mechanism 120 is provided between adjacent first columns 111 and second columns 112. Thus, when each handrail tube mechanism 120 is in the deployed position, each first column 111, each handrail tube mechanism 120, and each second column 112 are sequentially connected to form a ring-shaped structure. It should be understood that the term "multiple" as used in this application refers to at least two.

Specifically, referring to Figure 5 , there are two first columns 111 and two second columns 112, respectively, and four handrail tube mechanisms 120. When each handrail tube mechanism 120 is in the deployed position, each first column 111 and each second column 112 are connected via the handrail tube mechanism 120 to form a rectangular bed frame 10. Referring to Figures 5 to 8 , in some embodiments, the handrail tube mechanism 120 includes a first handrail tube assembly 121, which includes a first handrail tube 122. The first handrail tube 122 has a first pivoting end 1221A and a first sliding end 1221B. The first pivoting end 1221A pivots with the first column 111 or the second column 112, while the first sliding end 1221B pivots and slides with the second column 112 or the first column 111. In other words, when the first pivoting end 1221A is pivotally connected to one of the first and second columns 111, 112, the first sliding end 1221B is pivotally and slidably connected to the other. When the handrail tube mechanism 120 is in the deployed position, the first and second columns 111, 112 are spaced apart (see Figures 5 and 6), and the corresponding first handrail tube 122 is at least partially parallel to the horizontal plane.

6 and 7 , in some embodiments, the first handrail tube 122 includes a first tube segment 1222 and a second tube segment 1223 connected to each other and arranged at an angle. The first end of the first tube segment 1222, distal from the second tube segment 1223, is a first pivot end 1221A, and the first end of the second tube segment 1223, distal from the first tube segment 1222, is a first sliding end 1221B. Providing the first pivot end 1221A and the first sliding end 1221B at the end of each tube segment is beneficial to improving the convenience of connecting the first armrest tube 122 with the first column 111 and the second column 112; at the same time, when the armrest tube mechanism 120 is in the expanded position, the first armrest tube 122 has the maximum expanded length, so that the distance between the first column 111 and the second column 112 is maximized, thereby allowing the bed frame 10 to have a larger accommodating space in the expanded state to support the crib cover 1200, thereby increasing the area of the crib cover 1200 when in the expanded position, and providing a larger space for children to rest or entertain. More specifically, referring to Figures 6 and 7, when the handrail tube mechanism 120 is in the deployed position, the first tube segment 1222 is parallel to the horizontal plane, and the second tube segment 1223 extends downward from the second end of the first tube segment 1222.

In some embodiments, the angle α between the first tube segment 1222 and the second tube segment 1223 is greater than 90°.

More specifically, in some embodiments, the angle α between the first tube segment 1222 and the second tube segment 1223 is 150°. Of course, in some alternative embodiments, the angle α between the first tube segment 1222 and the second tube segment 1223 can also be 100°, 120°, or 140°, etc., without specific limitation herein.

To facilitate connecting the first armrest tube 122 to the first and second uprights 111, 112, and switching the first armrest tube 122 between the extended and folded positions, as shown in Figures 6 and 8, in some embodiments, the bed frame 10 further includes a top corner 130. More specifically, in some embodiments, the top corner 130 is provided on the first upright 111 or the second upright 112. Each top corner 130 has a first pivot portion Q1, which is configured to pivot with the first pivot end 1221A.

Furthermore, in some embodiments, the bed frame 10 further includes a slider 140. The slider 140 is slidably mounted on either the first column 111 or the second column 112. Each slider 140 has a second pivoting portion Q2, which pivots with the first sliding end 1221B. When the top angle 130 connected to a first armrest tube 122 is mounted on one of the first and second columns 111, 112, the slider 140 connected to that first armrest tube 122 is mounted on the other. When the user needs to switch the bed frame 10 from the expanded state to the retracted state, that is, when switching the armrest tube mechanism 120 from the expanded position to the retracted position (from the state shown in Figure 6 to the state shown in Figure 8), the user pushes or pulls the slider 140, so that the slider 140 drives the first sliding end 1221B of the first armrest tube 122 to move downward (F1 direction) along the corresponding first column 111 or the second column 112, thereby allowing the first sliding end 1221B of the first armrest tube 122 to rotate at the second pivot portion Q2 of the slider 140, and at the same time, allowing the first pivot end 1221A of the first armrest tube 122 to rotate at the first pivot portion Q1 of the top corner 130, thereby driving the first column 111 and the second column 112 to lean against each other. When the user needs to switch the bed frame 10 from the folded state to the extended state, that is, when switching the armrest tube mechanism 120 from the folded position to the extended position (from the state shown in Figure 8 to the state shown in Figure 6), the user pushes the slider 140, causing the slider 140 to move the first sliding end 1221B of the first armrest tube 122 upward (in the direction F2) along the corresponding first column 111 or second column 112. This causes the first sliding end 1221B of the first armrest tube 122 to rotate on the second pivot portion Q2 of the slider 140. Simultaneously, the first pivot end 1221A of the first armrest tube 122 rotates on the first pivot portion Q1 of the top corner 130, thereby moving the first column 111 and the second column 112 away from each other.

More specifically, in some embodiments, as shown in Figures 5 and 6 , in a circular bed frame 10 formed by connecting and enclosing a plurality of first columns 111, a plurality of second columns 112, and a plurality of first handrail tube assemblies 121, each top corner 130 disposed on a first column 111 or a second column 112 includes a first top corner portion 131 and a second top corner portion 132. The first top corner portion 131 and the second top corner portion 132 are connected to each other and arranged at an angle. Each first top corner portion 131 and the second top corner portion 132 are provided with a first pivot portion Q1, which is configured to pivot with the first pivot end 1221A of the first handrail tube 122. Similarly, each slider 140 on the second column 112 or the first column 111 can also include a first sliding portion 141 and a second sliding portion 142, which are connected to each other and arranged at an angle. Each first sliding portion 141 and the second sliding portion 142 are provided with a second pivoting portion Q2, which is used to pivot with the first sliding end 1221B of the first handrail tube 122. In this way, when the slider 140 slides on the second column 112 or the first column 111, the first sliding ends 1221B of the two first handrail tubes 122 connected to the same slider 140 will slide up and down with the slider 140 and pivot relative to it. At the same time, the first pivot ends 1221A of the two first handrail tubes 122 connected to the same top corner 130 will both pivot relative to the top corner 130.

Referring to Figures 5 to 8 , in this embodiment, the first handrail tube assembly 121 includes two first handrail tubes 122. The first pivot end 1221A of one first handrail tube 122 pivots to the first column 111, and the first sliding end 1221B of one first handrail tube 122 pivots and slides with the second column 112. The first pivot end 1221A of the other first handrail tube 122 pivots to the second column 112, and the first sliding end 1221B of the other first handrail tube 122 pivots and slides with the first column 111. In other words, when the first handrail tube assembly 121 includes two first handrail tubes 122, the first pivot end 1221A of one of the first handrail tubes 122 is pivotally connected to the first column 111, while the first sliding end 1221B of the first handrail tube 122 is pivotally and slidably connected to the second column 112; while the first pivot end 1221A of the other first handrail tube 122 is pivotally connected to the second column 112, while the first sliding end 1221B of the first handrail tube 122 is slidably pivotally connected to the first column 111. More specifically, when the handrail tube mechanism 120 is in the deployed position, the two first handrail tubes 122 within the first handrail tube assembly 121 are arranged horizontally side by side, and the projections of the first tube sections 1222 of the two first handrail tubes 122 on a vertical plane parallel to the LR direction (left-right direction) and perpendicular to the horizontal plane at least partially overlap (see Figure 7).

The following, combined with Figures 5 and 7, explains the meaning of the aforementioned statement that "the two first handrail tubes 122 are arranged side by side in the horizontal direction, and the projections of the first tube sections 1222 of the two first handrail tubes 122 on a vertical plane parallel to the LR direction (left-right direction) and perpendicular to the horizontal plane at least partially overlap."

Figure 5 schematically illustrates the bed frame 10 of this embodiment, which comprises two first uprights 111, two second uprights 112, and a handrail tube mechanism 120. When the bed frame 10 is deployed, it has a generally square structure and is generally symmetrical left-right and front-back. Referring to Figures 5 and 7 , taking one of the first uprights 111 and second uprights 112 arranged in the left-right direction as an example, the two first handrail tubes 122 disposed therebetween are in the deployed position. The first tube sections 1222 of the two first handrail tubes 122 are arranged side by side in the horizontal direction (specifically, in the front-back direction), with the two first tube sections 1222 partially overlapping in the front-back direction. Alternatively, taking one of the first columns 111 and second columns 112 arranged in the front-to-back direction as an example, when the two first handrail tubes 122 disposed therebetween are in the deployed position, the first tube sections 1222 of the two first handrail tubes 122 are arranged side by side in the horizontal direction (specifically, the left-right direction), and the two first tube sections 1222 partially overlap in the left-right direction.

It should be noted that, unless otherwise expressly specified or limited, directional terms such as "front," "back," "left," and "right" of the bed frame 10 in the various embodiments of this application are based on the "front," "back," "left," and "right" orientations of the bed frame 10 as shown in the diagrams. Arrows B and P schematically indicate the "front" and "back" directions, and arrows L and R schematically indicate the "left" and "right" directions. These directional terms are used solely to clarify the description of the embodiments of this application and are not intended to unduly limit the scope of protection of this application.

Referring to Figures 5 and 6 , in some embodiments, a top corner 130 is provided on each of the first and second columns 111, 112. Each top corner 130 includes a first top corner portion 131 and a second top corner portion 132, which are connected to each other and arranged at an angle. Both the first and second top corner portions 131, 132 have a first pivot portion Q1, which pivots with the first pivot end 1221A of the first handrail tube 122.

Continuing with Figures 5 and 6, in some embodiments, a slider 140 is slidably mounted on each of the first and second columns 111, 112. The slider 140 is capable of sliding up and down the first and second columns 111, 112. Each slider 140 includes a first sliding portion 141 and a second sliding portion 142, which are connected to each other and arranged at an angle. Both the first and second sliding portions 141, 142 are provided with a second pivoting portion Q2, which pivots with the first sliding end 1221B of the first handrail tube 122. When each first armrest tube assembly 121 switches from the extended position to the retracted position, the slider 140 located on each first column 111 and each second column 112 moves downward (in the F1 direction) along the corresponding first column 111 and second column 112. Simultaneously, the first sliding end 1221B of each first armrest tube 122 pivots relative to the second pivot portion Q2 of the slider 140, and the first pivot end 1221A of each first armrest tube 122 pivots relative to the first pivot portion Q1 of the top corner 130. In this way, each first column 111 and each second column 112 can be abutted against each other, so that the bed frame 10 switches from the extended state to the retracted state. When each first armrest tube assembly 121 switches from the retracted position to the extended position, the sliders 140 on each first column 111 and each second column 112 move upward (in the direction F2) along the corresponding first column 111 and second column 112. Simultaneously, the first sliding end 1221B of each first armrest tube 122 pivots relative to the second pivot portion Q2 of the slider 140, and the first pivot end 1221A of each first armrest tube 122 pivots relative to the first pivot portion Q1 of the top corner 130. This moves the first columns 111 and second columns 112 farther apart, allowing the bed frame 10 to switch from the retracted position to the extended position.

Referring to Figures 6 and 9 , in some embodiments, the top corner 130 is provided with a locking mechanism 150. When the armrest tube mechanism 120 is in the deployed position, the locking mechanism 150 can lock and cooperate with the slider 140 to restrict the slider 140 from sliding relative to the column 110, thereby maintaining the bed frame 10 in the deployed state.

Continuing with Figures 6 and 9 , in some embodiments, the locking mechanism 150 includes a locking member 151 pivoted to the top corner 130 . Specifically, the top corner 130 has a support 133 , and the locking member 151 pivots to the support 133 . The locking member 151 has an operating end 1511 and a locking end 1512 , and the sliding member 140 is provided with a locking engagement portion 143 . The locking member 151 pivots between a locked position and a released position. When the locking member 151 is in the locked position, the locking end 1512 engages with the locking engagement portion 143 . When the locking member 151 is in the unlocked position, the locking end 1512 can be disengaged from the locking engagement portion 143. More specifically, the pivot point between the locking member 151 and the support base 133 is located between the operating end 1511 and the locking end 1512. This allows the locking member 151 to pivot on the support base 133 in a manner similar to a "seesaw" structure. Specifically, pressing and rotating the operating end 1511 brings it closer to the center of the first or second column 111, causing the locking end 1512 to rise and move away from the center of the first or second column 111, 112, as the locking member 151 rotates. Of course, the locking member 151 can also be configured to pull the operating end 1511 to disengage the locking end 1512 from the locking engagement portion 143.

Furthermore, referring to FIG. 9 , in some embodiments, the locking mechanism 150 further includes a reset member 152. The operating end 1511 can be operated to pivot the locking member 151 from the locked position to the unlocked position. The reset member 152 is used to bias the operating end 1511 to pivot the locking member 151 toward the locked position. The reset member 152 is, for example, a spring that abuts the operating end 1511 and provides a reset force to bias the operating end 1511 away from the center of the first column 111 or the second column 112. To switch the locking member 151 from the locked position to the unlocked position, the user simply presses the operating end 1511. This causes the locking end 1512 to rise away from the center of the first column 111 or the second column 112, thereby disengaging the locking end 1512 from the locking engagement portion 143. Under the action of the reset member 152, the user simply releases the operating end 1511 to switch the locking member 151 from the unlocked position to the locked position.

Alternatively, in other embodiments, the support base 133 may be omitted, and the locking member 151 may be directly pivoted onto the top corner 130 (see FIG32 ). Specifically, a mounting base 134 is provided on the top corner 130, and a push channel 1341 is defined within the mounting base 134. An operating end 1511 of the locking member 151 extends into the mounting base 134 and is received within the push channel 1341. More specifically, the push channel 1341 extends through the mounting base 134 along its length, and a button 153 is movably disposed within the push channel 1341. The button 153 is located on the side of the operating end 1511 facing away from the column 110 and abuts against the operating end 1511. In this way, the user can directly push button 153 horizontally to push operating end 1511 to rotate around the pivot point between locking member 151 and top corner 130, causing locking end 1512 to rise and disengage from locking engagement portion 143. This allows the user to rotate locking member 151 by simply pressing button 153 horizontally, without having to press and rotate operating end 1511, making operation more convenient and quick.

Of course, in some alternative embodiments, the implementation of the locking mechanism 150 is not limited to the above examples, as long as it can lock the sliding member 140.

Referring to Figures 5 to 9 , in some embodiments, the first handrail tube assembly 121 further includes a pivoting connection mechanism 123. The two first handrail tubes 122 are pivotally connected via the pivoting connection mechanism 123. Specifically, when the first handrail tube assembly 121 includes two first handrail tubes 122, the two first handrail tubes 122 are pivotally connected via the pivoting connection mechanism 123. When the sliding member 140 corresponding to one of the first handrail tubes 122 moves downward on the first column 111 or the second column 112, the first sliding end 122B of the first handrail tube 122 moves downward, causing the first handrail tube 122 to tilt and move downward. At this time, the rotating connection mechanism 123 also moves downward under the action of the first handrail tube 122. Under the action of the rotating connection mechanism 123, the other first handrail tube 122 can also move downward, thereby enabling the sliding member 140 corresponding to the other first handrail tube 122 to move downward relative to the second column 112 or the first column 111. As can be seen, the rotating connection mechanism 123 functions as a linkage, enabling the two first armrest tubes 122 between the adjacent first and second posts 111, 112 to rotate synchronously. By providing the rotating connection mechanism 123, the user can simply push or pull down a single slider 140 to retract all armrest tube mechanisms 120, thereby folding the entire crib 1000.

Specifically, the rotatable connecting mechanism 123 is connected to the first tube segments 1222 of the two first armrest tubes 122. When the two first armrest tubes 122 are in the extended position, the two first tube segments 1222 have an overlapping area. Furthermore, when the armrest tube mechanism 120 is in the extended position, i.e., when the two first armrest tubes 122 are in the extended position, the rotatable connecting mechanism 123 is located below each first tube segment 1222. This prevents the rotatable connecting mechanism 123 from protruding above the horizontal plane of the first armrest tubes 122, which could cause the crib cover 1200 to not fit snugly.

It should be noted that the phrase "when the armrest tube mechanism 120 is in the extended position, the rotatable connecting mechanism 123 is located below each first tube segment 1222" means that when the armrest tube mechanism 120 is in the extended position, along the orientation of the first connecting portion 12311 (see Figure 7) and the second connecting portion 12312 (see Figure 7) on the rotatable connecting mechanism 123, the end of the rotatable connecting mechanism 123 with the first connecting portion 12311 is located below the height of the top surface of the first tube segment 1222. In other words, the end of the rotatable connecting mechanism 123 with the first connecting portion 12311 does not protrude above the horizontal plane of the top surface of the first tube segment 1222, thereby improving the snug fit of the crib cover 1200 against the armrest tube mechanism 120.

6 to 8 , in some embodiments, the rotating connection mechanism 123 includes a rotating member 1231. Two rotating members 1231 are provided, and each rotating member 1231 is provided with a first connecting portion 12311 and a second connecting portion 12312. Each first handrail tube 122 is correspondingly connected to the first connecting portion 12311 of each rotating member 1231, and the two second connecting portions 12312 are rotatably connected. When the two first handrail tubes 122 in the first handrail tube group 121 are in the expanded position, the two rotating members 1231 overlap each other; when the two first handrail tubes 122 in the first handrail tube group 121 switch from the expanded position to the retracted position, the two rotating members 1231 rotate with each other through the second connecting portion 12312 to form a certain angle. Specifically, as the first column 111 and the second column 112 approach each other, the angle between the two rotating members 1231 gradually increases.

Specifically, in some embodiments, as shown in FIG10 , the rotating member 1231 includes a first clamping plate 12313, a connecting plate 12314, and a second clamping plate 12315. The connecting plate 12314 is connected between the first clamping plate 12313 and the second clamping plate 12315. The first clamping plate 12313, the connecting plate 12314, and the second clamping plate 12315 enclose a retaining groove 12316 (see FIG10 ), giving the rotating member 1231 a generally U-shaped structure. Both the first clamping plate 12313 and the second clamping plate 12315 are provided with a first connecting portion 12311 and a second connecting portion 12312, with the first connecting portion 12311 being closer to the notch of the retaining groove 12316 than the second connecting portion 12312. The first handrail tube 122 is positioned within the retaining groove 12316 and connected to the two first connecting portions 12311. More specifically, the first connecting portion 12311 and the second connecting portion 12312 are both retaining holes. By placing the first handrail tube 122 within the retaining groove 12316 and connecting it to the first handrail tube 122 with a connecting member such as a screw or bolt passing through the retaining holes (first connecting portion 12311), the first handrail tube 122 is stably mounted on the rotating member 1231. Furthermore, the two rotating members 1231 can be rotatably connected by a shaft or the like passing through the retaining holes (second connecting portion 12312).

Referring to Figure 10 , in some embodiments, the rotating member 1231 further includes reinforcing ribs 12317. Ribs 12317 are provided on both the first clamping plate 12313 and the second clamping plate 12315. The ribs 12317 on the first clamping plate 12313 extend toward the second clamping plate 12315, while the ribs 12317 on the second clamping plate 12315 extend toward the first clamping plate 12313. The addition of reinforcing ribs 12317 improves the overall structural strength of the rotating member 1231. Furthermore, the ends of each reinforcing rib 12317 near the notch of the retaining slot 12316 can be used to support the first handrail tube 122 (see Figure 7) that is captured within the retaining slot 12316.

Referring to Figures 11 and 12 , in some alternative embodiments, the rotating connection mechanism 123 includes two rotating connection portions 1232. Each rotating connection portion 1232 includes a clamping plate 12321 and a connecting post 12322 secured to the clamping plate 12321. The clamping plate 12321 is provided with a first connecting portion 12311. The two first handrail tubes 122 are respectively connected to the first connecting portions 12311 of the two rotating connection portions 1232 and pivotally connected via the connecting posts 12322 of the two rotating connection portions 1232.

Continuing with Figures 11 and 12, the clamping plates 12321 of the two rotating connecting portions 1232 and the connecting posts 12322 of the two rotating connecting portions 1232 enclose a retaining slot 12316. The two first handrail tubes 122 are positioned within the retaining slot 12316 and connected to the corresponding first connecting portions 12311. Alternatively, one of the two first handrail tubes 122 is positioned within the retaining slot 12316 and connected to the corresponding first connecting portion 12311, while the other is positioned outside the retaining slot 12316 and connected to the corresponding first connecting portion 12311. Alternatively, both first handrail tubes 122 are positioned outside the retaining slot 12316 and connected to the corresponding first connecting portion 12311.

13 and 14 , in some embodiments, the bed frame 10 further includes a first protective assembly 160 . Specifically, the first protective assembly 160 is disposed on the first armrest tube 122 and is located at the pivot point of the two first armrest tubes 122 , that is, at the junction of the first armrest tube 122 and the rotating connection mechanism 123 . When the armrest tube mechanism 120 switches from the extended position to the retracted position, the two first armrest tubes 122 pivot relative to the rotating connection mechanism 123 and enclose the rotating connection mechanism 123 to form a first shearing clamping area 127 (see FIG. 8 ). The first protective assembly 160 is used to shield the first shearing clamping area 127 (see FIG. 8 and FIG. 14 for comparison). This prevents the crib cover 1200 from entering the first shearing and clamping area 127 during folding of the bed frame 10, thereby preventing smooth folding of the bed frame 10. It also prevents the user's hand from accidentally entering the first shearing and clamping area 127, thereby preventing possible injury.

In one embodiment, at least one of the two first handrail tubes 122 between the first column 111 and the second column 112 is provided with a first protective assembly 160. In other words, the first protective assembly 160 may be provided on any one of the first handrail tubes 122, or both first handrail tubes 122 may be provided with the first protective assembly 160.

Referring to Figures 14 and 15 , in some embodiments, the first protective assembly 160 includes a first protective baffle 161 and a first protective connector 162 that are interconnected. The first protective baffle 161 is used to shield the first shearing nip region 127. In this embodiment, the first protective baffle 161 is a generally trapezoidal sheet structure, and the first protective connector 162 is disposed at a bottom edge of the first protective baffle 161. In this embodiment, the first protective baffle 161 and the first protective connector 162 are integrally formed. In other embodiments, the first protective baffle 161 and the first protective connector 162 may also be connected by riveting, welding, or the like. A first arcuate concave surface 1621 is formed on one side of the first protective connector 162 that is opposite to the first protective connector 162 and that can fit with the outer wall of the first handrail tube 122. In this embodiment, two first connecting protrusions are provided at intervals on one side of the first arcuate concave surface 1621, and each first connecting protrusion is provided with a first connecting hole 1622. In other embodiments, the number of first connecting protrusions and first connecting holes 1622 can also be more than two or less than two. Two first fixing holes (not shown in the accompanying drawings) are provided on the corresponding first handrail tube 122, which are respectively opposite to the two first connecting holes 1622. Two fasteners (such as pull nails, screws or rivets, etc.) pass through the corresponding first connecting holes 1622 and the first fixing holes to connect the first protective assembly 160 and the first handrail tube 122. This improves the stability of the first protective assembly 160 after installation. Of course, in other alternative embodiments, the first protective assembly 160 can also be connected to the first handrail tube 122 by snapping, or the first protective assembly 160 can be integrally molded onto the first handrail tube 122.

Figure 16 shows a perspective view of a bed frame 10 according to the second embodiment of this application. Similar to the first embodiment, the bed frame 10 includes a first column 111, a second column 112, and an armrest tube mechanism 120. The second column 112 is disposed opposite the first column 111. The armrest tube mechanism 120 is movably connected between the first column 111 and the second column 112. The armrest tube mechanism 120 is switchable between an extended position (see Figures 16 and 17) and a retracted position (see Figure 19). When in the extended position, the armrest tube mechanism 120 is at least partially parallel to the horizontal plane.

Comparing the bed frame 10 of the first embodiment with the bed frame 10 of the second embodiment (see Figures 5 and 16 ), it can be seen that the armrest tube mechanism 120 of the bed frame 10 in the second embodiment is different from the armrest tube mechanism 120 of the bed frame 10 in the first embodiment.

Referring to FIG. 16 , in some embodiments, the handrail tube mechanism 120 includes a second handrail tube assembly 124, which includes two second handrail tubes 125 and two third handrail tubes 126. Referring to FIG. 17 , each second handrail tube 125 has a second pivot end 1251A and a second sliding end 1251B. The two second pivot ends 1251A are pivotally connected, and the two second sliding ends 1251B are slidably mounted on the first column 111 and the second column 112, respectively, and pivotally connected to the first column 111 and the second column 112. Each third handrail tube 126 has a third pivot end 1261A and a fourth pivot end 1261B. The two third pivot ends 1261A are pivotally connected to each other, and the two fourth pivot ends 1261B are pivotally connected to the first column 111 and the second column 112, respectively. When the handrail tube mechanism 120 is in the deployed position, at least a portion of each second handrail tube 125 and at least a portion of each third handrail tube 126 are parallel to the horizontal plane. Therefore, when the armrest tube mechanism 120 is in the unfolded position, the crib cover 1200 (e.g., a fabric cover) mounted on the crib tends to lie flat, ensuring a better fit with the armrest tube mechanism 120. This, in turn, gives the bed frame 10 covered with the crib cover 1200 a neater appearance.

Referring to FIG. 18 , in some embodiments, the second handrail tube 125 includes a third tube segment 1252 and a fourth tube segment 1253 connected and arranged at an angle. The first end of the third tube segment 1252 distal from the fourth tube segment 1253 is a second pivot end 1251A, and the first end of the fourth tube segment 1253 distal from the third tube segment 1252 is a second sliding end 1251B. Simultaneously, the third handrail tube 126 includes a fifth tube segment 1262 and a sixth tube segment 1263 connected and arranged at an angle. The first end of the fifth tube segment 1262 distal from the sixth tube segment 1263 is a fourth pivot end 1261B, and the first end of the sixth tube segment 1263 distal from the fifth tube segment 1262 is a third pivot end 1261A. When the handrail tube mechanism 120 is in the extended position, each third tube segment 1252 and each fifth tube segment 1262 are located in the same horizontal plane, with the fourth tube segment 1253 extending downward from the second end of the third tube segment 1252, and the sixth tube segment 1263 extending downward from the second end of the fifth tube segment 1262. Furthermore, the second handrail tube 125 and the third handrail tube 126 connected to the first column 111 or the second column 112 are arranged horizontally side by side, and the projections of the fifth tube segment 1262 and the third tube segment 1252 on a vertical plane parallel to the front-back direction (BP direction) and perpendicular to the horizontal plane overlap.

The following, in conjunction with Figures 16 and 18, explains the meaning of the phrase "the second handrail tube 125 and the third handrail tube 126 connected to the first column 111 or the second column 112 are arranged horizontally side by side, and the projections of the fifth tube segment 1262 and the third tube segment 1252 on a vertical plane parallel to the front-back direction (BP direction) and perpendicular to the horizontal plane partially overlap."

Figure 16 schematically illustrates the bed frame 10 of this embodiment, which comprises two first uprights 111, two second uprights 112, and a handrail tube mechanism 120. When the bed frame 10 is in the deployed state, it has a generally square structure and is generally symmetrical left-right and front-back. In this embodiment, taking one of the first uprights 111 and the second uprights 112 arranged in the front-back direction as an example, when the two second handrail tubes 125 and two third handrail tubes 126 disposed therebetween are in the deployed position, the second handrail tubes 125 and the third handrail tubes 126 are arranged side by side in the horizontal direction (specifically, in the left-right direction), and the third tube segment 1252 of the second handrail tube 125 and the fifth tube segment 1262 of the third handrail tube 126 partially overlap in the left-right direction (see Figures 16 and 18).

Referring to Figures 16 and 18 , in some embodiments, the second pivot ends 1251A of two third tube segments 1252 are arranged horizontally side by side, and their projections on a vertical plane parallel to the front-to-back direction and perpendicular to the horizontal plane partially overlap. Specifically, taking one of the first and second upright posts 111 and 112 arranged along the front-to-back direction as an example, when the two second handrail tubes 125 disposed therebetween are in the deployed position, the corresponding second pivot ends 1251A of the two third tube segments 1252 are arranged horizontally side by side (specifically, in the left-to-right direction), and the corresponding second pivot ends 1251A of the two third tube segments 1252 partially overlap in the left-to-right direction.

In some embodiments, the angle α between the third tube segment 1252 and the fourth tube segment 1253 is greater than 90°.

More specifically, in some embodiments, the angle α between the third tube segment 1252 and the fourth tube segment 1253 is 150°. Of course, in some alternative embodiments, the angle α between the third tube segment 1252 and the fourth tube segment 1253 can also be 100°, 120°, or 140°, etc., without specific limitation herein.

In some embodiments, the angle α (not shown) between the fifth tube segment 1262 and the sixth tube segment 1263 is greater than 90°.

More specifically, in some embodiments, the angle α between the fifth tube segment 1262 and the sixth tube segment 1263 is 150°. Of course, in some alternative embodiments, the angle α between the fifth tube segment 1262 and the sixth tube segment 1263 can also be 100°, 120°, or 140°, etc., without specific limitation herein.

Referring to Figures 16 and 18 , the second handrail tube assembly 124 further includes the rotatable connecting mechanism 123 described in the first embodiment. Specifically, the rotatable connecting mechanism 123 is connected to the second handrail tube 125 and the third handrail tube 126. In this embodiment, two rotatable connecting mechanisms 123 are provided in one second handrail tube assembly 124. Along the parallel direction of the second and third handrail tubes 125, 126, the second and third handrail tubes 125, 126, which are arranged opposite each other, are connected by a rotatable connecting mechanism 123.

Referring to Figure 16 , in some embodiments, the bed frame 10 further includes the top corner 130 and the slider 140 described in the first embodiment, and the top corner 130 has a locking mechanism 150. As described in the first embodiment, each first column 111 and each second column 112 is provided with a top corner 130 and a slider 140.

Specifically, the top corner 130 includes a first top corner portion 131 and a second top corner portion 132, which are connected to each other and arranged at an angle. Each of the first and second top corner portions 131, 132 has a first pivot portion Q1, which pivots with the fourth pivot end 1261B. Specifically, the slider 140 includes a first sliding portion 141 and a second sliding portion 142, which are connected to each other and arranged at an angle. Each of the first and second sliding portions 141, 142 has a second pivot portion Q2, which pivots with the second sliding end 1251B.

When using the bed frame 10 of this embodiment, when a user needs to switch the bed frame 10 from an extended state to a retracted state, that is, when switching the armrest tube mechanism 120 from an extended position to a retracted position (from the state shown in FIG. 17 to the state shown in FIG. 19 ), the operating process can be described using the armrest tube mechanism 120 disposed between a first column 111 and a second column 112.

17-19 , a user pushes or pulls slider 140, causing it to move the second sliding end 1251B of the corresponding second handrail tube 125 downward (in the F1 direction) on the corresponding first and second posts 111, 112. In the deployed state, each third tube segment 1252 is arranged horizontally, with the fourth tube segment 1253 extending downward from the second end of each third tube segment 1252. Furthermore, each fifth tube segment 1262 is arranged horizontally, with the sixth tube segment 1263 extending downward from the second end of each fifth tube segment 1262. Therefore, when second sliding end 1251B moves downward with slider 140, the second handrail tube 125 pivots, causing the two second pivoting ends 1251A to rotate relative to each other, bringing the two second handrail tubes 125 closer together. Simultaneously, the rotating connection mechanism 123 moves downward along with the second armrest tube 125. This, in conjunction with the rotating connection mechanism 123, causes the third armrest tube 126 to rotate downward relative to the corresponding top angle 130. The two third pivot ends 1261A rotate relative to each other, bringing the two third armrest tubes 126 closer together and ultimately bringing the first and second uprights 111 and 112 closer together. The rotating connection mechanism 123 allows the user to retract all armrest tube mechanisms 120 by simply pushing or pulling a single slider 140 downward, thereby folding the entire crib 1000.

When using the bed frame 10 of this embodiment, when a user needs to switch the bed frame 10 from the folded state to the unfolded state, that is, when switching the armrest tube mechanism 120 from the folded position to the unfolded position (from the state shown in FIG. 19 to the state shown in FIG. 17 ), the operating process can also be described using the armrest tube mechanism 120 disposed between a first column 111 and a second column 112.

Referring to Figure 19, the user pushes the slider 140, causing the slider 140 to move the second sliding ends 1251B of the second handrail tubes 125 upward along the corresponding first and second posts 111, 112. At this point, the two second handrail tubes 125 move away from each other, pushing the first and second posts 111, 112 away from each other. During this process, the fourth pivoting ends 1261B of the two third handrail tubes 126 rotate upward relative to the first pivot Q1. The movement of the two third handrail tubes 126 away from each other also pushes the first and second posts 111, 112 away from each other. When the two second handrail tubes 125 and the two third handrail tubes 126 are fully extended, the sliding member 140 can be locked to the first column 111 and the second column 112 via the locking mechanism 150.

20 to 22 , the bed frame 10 provided in the second embodiment may further include a second protective assembly 170. FIG. 20 shows a partial structure of the bed frame 10, where the second armrest tube set 124 is in the extended position; FIG. 21 shows the bed frame 10 in FIG. 20 , with the second armrest tube set 124 in a transition position between the extended position and the retracted position; and FIG. 22 shows the bed frame 10 in FIG. 20 , with the second armrest tube set 124 in the retracted position. In this embodiment, the second protective assembly 170 is provided on each second armrest tube 125 and/or the third armrest tube 126. In other words, the second protective assembly 170 may be provided only on each second armrest tube 125; or, may be provided only on each third armrest tube 126; or, may be provided on both the second armrest tube 125 and the third armrest tube 126. Furthermore, the second protective assembly 170 is located at the junction of the second handrail tube 125 and the third handrail tube 126 connected to the first column 111 or the second column 112, that is, at the connection between the second handrail tube 125 and the rotating connection mechanism 123; and/or the connection between the third handrail tube 126 and the rotating connection mechanism 123. When the handrail tube mechanism 120 switches from the extended position to the retracted position, the second handrail tube 125 and the third handrail tube 126 connected to the first column 111 or the second column 112 respectively pivot relative to the corresponding rotating connection mechanism 123 and enclose the corresponding rotating connection mechanism 123 to form a second shear clamping area 128 (see Figure 19). The second protective assembly 170 is used to shield the second shear clamping area 128 (see Figures 19 and 22 for comparison). This prevents the crib cover 1200 from entering the second shearing recess 128 during folding of the bed frame 10, thereby preventing the bed frame 10 from folding smoothly. It also prevents the user's hand from accidentally entering the second shearing recess 128, thereby preventing possible injury.

As shown in Figure 19, when the handrail tube mechanism 120 switches from the extended position to the retracted position, the two sixth tube segments 1263 pivot relative to each other and gradually enclose a third shear-clamping zone 129. Specifically, this refers to the area enclosed by the inner sides of the two sixth tube segments 1263. Specifically, as shown in Figures 20 to 22, in this embodiment, a second protective assembly 170 is installed on each third handrail tube 126. When the second protective assembly 170 is installed on each third handrail tube 126, the second protective plate 170 extends from the fifth tube segment 1262 to the sixth tube segment 1263. Thus, the second protective assembly 170 also serves to shield the third shear-clamping zone 129 (see Figures 19 and 22). This not only prevents the crib cover 1200 from entering the third shearing and clamping area 129, but also prevents hands from accidentally entering the third shearing and clamping area 129.

Specifically, as shown in FIG23 , the second protective assembly 170 of the bed frame 10 in the second embodiment includes a second protective baffle 171 and a second protective connector 172 that are connected to each other. The second protective baffle 171 is used to shield the second shear clamping area 128 and the third shear clamping area 129. In this embodiment, the second protective baffle 171 is a roughly trapezoidal sheet structure, and the second protective connector 172 is provided at the bottom edge and the side edge of one side of the second protective baffle 171. In this embodiment, the second protective baffle 171 and the second protective connector 172 are integrally formed. In other embodiments, the second protective baffle 171 and the second protective connector 172 may also be connected by riveting, welding, or the like. The side of the second protective connector 172 facing away from the second protective baffle 171 forms a second curved concave surface 1721 that mates with the outer wall of the second handrail tube 125 and/or the third handrail tube 126. In this embodiment, two second connecting protrusions are spaced apart on one side of the second curved concave surface 1721, each of which is provided with a second connecting hole 1722. In other embodiments, the number of second connecting protrusions and second connecting holes 1722 may be more or less than two. The corresponding second and/or third handrail tubes 125 and 126 are provided with two second fixing holes (not shown) corresponding to the two second connection holes 1722. Two fasteners (such as pull pins, screws, or rivets) are respectively inserted through the corresponding second connection holes 1722 and second fixing holes to connect the second protective assembly 170 to the second and/or third handrail tubes 125 and 126. This improves the stability of the second protective assembly 170 after installation. Of course, the second protective plate 170 can also be attached to the second and/or third handrail tubes 125 and 126 through other methods, such as snap-fitting, which is not limited here.

As shown in Figures 17 and 18 , when the handrail tube mechanism 120 switches between the extended and retracted positions, the two sixth tube segments 1263 pivot relative to each other and gradually enclose a third shear-clamping zone 129. Specifically, this refers to the area enclosed by the outer sides of the two sixth tube segments 1263. Alternatively, in other alternative embodiments, the second protective shield 171 of the second protective assembly 170 may have other shapes. For example, the second protective shield 171 may be a generally rectangular sheet-like structure. As shown in Figures 27 and 28 , in one embodiment, the second protective shield 171 comprises a first plate 1711 and a second plate 1712 connected to each other. The first plate 1711 is a roughly right-angled trapezoidal sheet structure, and the second plate 1712 is a roughly triangular sheet structure. The second plate 1712 is disposed at the oblique side edge of the first plate 1711, so that the entire second protective baffle 171 is roughly rectangular. Thus, as shown in Figures 24 to 26, when the second protective shield 171 is installed on each third handrail tube 126, the first plate 1711 can be used to simultaneously block the second shear clamping area 128 and the third shear clamping area 129, and the third shear clamping area 129 is always blocked. This means that both the third shear clamping area 129 on the inner side of the sixth tube section 1263 and the third shear clamping area 129 on the outer side of the sixth tube section 1263 are blocked (see Figures 18, 19, 22, and 26). Specifically, as shown in Figures 27 and 28, an arcuate groove 1713 is formed at the connection between the first plate 1711 and the second plate 1712. The arc-shaped groove 1713 is used to adapt to the sixth pipe section 1263 and play a avoiding role, so that after the second protective baffle 171 is installed on the third handrail tube 126, the first plate body 1711 and the second plate body 1712 can be in the same vertical plane to respectively block the third shear clamping area 129 on the inner side of the sixth pipe section 1263 and the third shear clamping area 129 on the outer side of the sixth pipe section 1263. Specifically, a second connection hole 1722 is formed in the wall of the arcuate groove 1713 and on the first plate 1711. Two fasteners (such as pull pins, screws, or rivets) pass through the corresponding second connection holes 1722 to connect to the sixth tube section 1263 and the rotating connection mechanism 123 (such as the rotating member 1231 or the clamping plate 12321), thereby connecting the second protective assembly 170 to the third handrail tube 126.

It should be noted that the "inner side" of the sixth tube segment 1263 refers to the side of the sixth tube segment 1263 that faces the angle formed between the sixth tube segment 1263 and the fifth tube segment 1262, which is less than 180 degrees; and the "outer side" of the sixth tube segment 1263 refers to the side of the sixth tube segment 1263 that faces away from the angle formed between the sixth tube segment 1263 and the fifth tube segment 1262, which is less than 180 degrees. In other words, the "inner side" of the sixth tube segment 1263 refers to the lower side of the sixth tube segment 1263 when the handrail tube mechanism is deployed, as shown in Figure 24; and the "outer side" of the sixth tube segment 1263 refers to the upper side of the sixth tube segment 1263 when the handrail tube mechanism is deployed, as shown in Figure 24. Optionally, in some alternative embodiments, the handrail tube mechanism 120 includes a second handrail tube assembly 124, which may include only the two aforementioned second handrail tubes 125. Each second handrail tube 125 has a second pivot end 1251A and a second sliding end 1251B. The two second pivot ends 1251A are pivotally connected, and the two second sliding ends 1251B are slidably mounted on the first column 111 and the second column 112, respectively, and pivotally connected to the first column 111 and the second column 112. When the handrail tube mechanism 120 is in the deployed position, at least a portion of each second handrail tube 125 is parallel to the horizontal plane.

Alternatively, in some alternative embodiments, the handrail tube mechanism 120 includes a second handrail tube assembly 124, which may include only the two third handrail tubes 126 described above. Each third handrail tube 126 has a third pivot end 1261A and a fourth pivot end 1261B. The two third pivot ends 1261A pivot together, while the two fourth pivot ends 1261B pivot with the first column 111 and the second column 112, respectively. When the handrail tube mechanism 120 is in the deployed position, at least a portion of each third handrail tube 126 is parallel to the horizontal plane.

FIG29 shows a perspective view of a bed frame 10 provided according to the third embodiment of the present application, which is similar to the first or second embodiment described above. The bed frame 10 includes a plurality of columns 110 (which can be regarded as the first column 111 and the second column 112 in the first or second embodiment) and a plurality of armrest tube mechanisms 120. More specifically, the plurality of columns 110 are arranged at intervals along the circumference, and an armrest tube mechanism 120 is movably connected between two adjacent columns 110. The armrest tube mechanism 120 is switchable between an extended position and a retracted position so that the bed frame 10 can be switched between an extended state and a retracted state. When the armrest tube mechanism 120 is in the extended position, the armrest tube mechanism 120 is at least partially parallel to the horizontal plane. When the bed frame 10 is in the extended state, the plurality of upright posts 110 are spaced apart from each other (see FIG. 17 ); when the bed frame 10 is in the retracted state, the plurality of upright posts 110 are retracted into each other.

In some examples of the third embodiment, the handrail tube structure 120 includes at least one of a first handrail tube group 121 and a second handrail tube group 124.

Specifically, the bed frame 10 in the third embodiment shown in FIG29 includes both a first armrest tube set 121 and a second armrest tube set 124. Specifically, the first armrest tube set 121 may be referred to as the first armrest tube set 121 of the bed frame 10 provided in the first embodiment, and the second armrest tube set 124 may be referred to as the second armrest tube set 124 of the bed frame 10 provided in the second embodiment.

In some embodiments, as shown in FIG29 , the bed frame 10 includes four columns 110 spaced circumferentially. To clarify the armrest tube mechanisms 120 disposed between the columns 110, the four columns 110 may be referred to as the first column 111, the second column 112, the third column 113, and the fourth column 114. A first armrest tube assembly 121 is disposed between the first column 111 and the second column 112, and between the third column 113 and the fourth column 114, with the two first armrest tube assemblies 121 facing each other. A second armrest tube assembly 124 is disposed between the first column 111 and the fourth column 114, and between the second column 112 and the third column 113, with the two second armrest tube assemblies 124 facing each other. When the bed frame 10 is in the unfolded state, it generally has a rectangular structure.

Referring to Figure 29 , in some embodiments, each of the first, second, third, and fourth columns 111, 112, 113, and 114 is provided with a top angle 130 and a sliding member 140. The top angle 130 includes a first top angle portion 131 and a second top angle portion 132, which are connected to each other and arranged at an angle. Both the first and second top angle portions 131, 132 are provided with a first pivot portion Q1. Specifically, one first pivot portion Q1 pivots to the first pivot end 1221A of the first handrail tube 122, while the other first pivot portion Q1 pivots to the fourth pivot end 1261B of the third handrail tube 126.

Continuing with Figure 29 , in some embodiments, the slider 140 includes a first sliding portion 141 and a second sliding portion 142 , which are connected to each other and arranged at an angle. Both the first sliding portion 141 and the second sliding portion 142 are provided with a second pivoting portion Q2. Specifically, one second pivoting portion Q2 pivots with the first sliding end 1221B of the first handrail tube 122 , while the other second pivoting portion Q2 pivots with the second sliding end 1251B of the second handrail tube 125 .

Referring to Figure 30 , in the third embodiment, the bed frame 10 includes both a first protective assembly 160 and a second protective assembly 170 . Specifically, the structure and placement of the first protective assembly 160 can be found in the first embodiment of the bed frame 10 ; the structure and placement of the second protective assembly 170 can be found in the second embodiment of the bed frame 10 . These details will not be repeated here.

It should be noted that in the third embodiment, the second protective baffle 171 in the second protective assembly 170 can be in the aforementioned trapezoidal sheet structure (see Figures 23 and 30 ); of course, it can also be in the aforementioned rectangular sheet structure (see Figures 27 and 31 ).

Referring to Figures 33 and 34 , the fourth embodiment of this application further provides a bed frame 10, which is a variation of the bed frame 10 shown in the first embodiment described above. It includes: a plurality of upright posts 110 and a plurality of handrail tube mechanisms 120. The upright posts 110 are spaced circumferentially, with a handrail tube mechanism 120 movably connected between each pair of adjacent upright posts 110. The handrail tube mechanisms 120 include at least one pair of handrail tubes, each pair comprising two handrail tubes that intersect and pivotally connect. Each handrail tube mechanism 120 is switchable between an extended position and a retracted position, allowing the bed frame 10 to switch between an extended state and a retracted state.

It should be noted that the "pair of armrest tubes" in the fourth embodiment may refer to two first armrest tubes 122. However, it should be emphasized that the two first armrest tubes 122 are straight tubes, meaning that the first tube section 1222 and the second tube section 1223 are coaxial. Furthermore, compared to the bed frame 10 in the first embodiment, the bed frame 10 in the fourth embodiment omits the pivoting connection mechanism 123. This means that, while two first armrest tubes 122 are provided between the two uprights 110, they are directly pivoted rather than being pivoted via the pivoting connection mechanism 123.

Furthermore, referring to Figures 35 and 36 , the bed frame 10 in the fourth embodiment also includes multiple third protection assemblies 180. Specifically, each pair of armrest tubes is equipped with a third protection assembly 180, and the third protection assembly 180 is mounted on at least one armrest tube and located at the junction between the two armrest tubes. When each armrest tube mechanism 120 switches between the extended and folded positions, each third protection assembly 180 is used to shield the fourth shear-clip zone α1 (see Figure 34) formed between the two armrest tubes (i.e., the two first armrest tubes 122) in the corresponding pair of armrest tubes. This prevents the child's crib cover 1200 or hands from accidentally entering the fourth shear-clip zone α1 when the bed frame 10 is folded.

Specifically, referring to Figures 35 and 36 , the third protective assembly 180 includes a third protective baffle 181 and a third protective connector (not shown) that are interconnected. The third protective baffle 181 is used to shield the fourth shearing zone α1. In this embodiment, the third protective baffle 181 is a generally rectangular sheet-like structure, and the third protective connector is located at one edge of the third protective baffle 181. In this embodiment, the third protective baffle 181 and the third protective connector are integrally formed. In other embodiments, the third protective baffle 181 and the third protective connector can also be connected by riveting, welding, or other methods. The side of the third protective connector facing away from the third protective baffle 181 forms a third curved concave surface (not shown) that is adapted to conform to the outer wall of the handrail tube. In this embodiment, two third connecting protrusions (not shown in the attached drawings) are provided at intervals on one side of the third arc-shaped concave surface, and each third connecting protrusion is provided with a third connecting hole (not shown in the attached drawings). In other embodiments, the number of third connecting protrusions and third connecting holes may be more than two or less than two. Two third fixing holes (not shown in the attached drawings) are provided on the corresponding handrail tube, respectively corresponding to the two third connecting holes. Two fasteners (such as pull nails, screws or rivets, etc.) pass through the corresponding third connecting holes and third fixing holes to connect the third protective assembly 180 and the handrail tube. In this way, the stability of the third protective assembly 180 after installation can be improved. Of course, in other alternative embodiments, the third protective assembly 180 may be connected to the handrail tube by snapping, or the third protective assembly 180 may be integrally formed on the handrail tube.

Referring to Figures 37 and 38 , the fifth embodiment of the present application further provides a bed frame 10, which is a variation of the bed frame 10 shown in the second embodiment described above. It includes a plurality of upright posts 110 and a plurality of armrest tube mechanisms 120. The upright posts 110 are spaced circumferentially, with an armrest tube mechanism 120 movably connected between each pair of adjacent upright posts 110. The armrest tube mechanisms 120 include two pairs of armrest tubes, which are pivotally connected to each other. Specifically, each pair of armrest tubes includes two armrest tubes, which intersect and pivotally connect to each other. Each armrest tube mechanism 120 is switchable between an extended position and a retracted position, allowing the bed frame 10 to switch between an extended state and a retracted state.

It should be noted that the "pair of armrest tubes" in the fifth embodiment may refer to the second armrest tube 125 and the third armrest tube 126. However, it should be emphasized that the second armrest tube 125 and the third armrest tube 126 are straight tubes, meaning that the third tube segment 1252 and the fourth tube segment 1253 are coaxial, and the fifth tube segment 1262 and the sixth tube segment 1263 are coaxial. Furthermore, compared to the bed frame 10 in the second embodiment, the bed frame 10 in the fifth embodiment omits the rotating connection mechanism 123. This means that the second armrest tube 125 and the third armrest tube 126 are directly pivoted, rather than pivoted via the rotating connection mechanism 123.

Furthermore, referring to Figures 39 and 40 , the bed frame 10 in the fifth embodiment further includes a plurality of third protective assemblies 180. Specifically, each pair of armrest tubes is provided with a third protective assembly 180, and the third protective assembly 180 is mounted on at least one armrest tube and located at the junction between the two armrest tubes. This means that the third protective assembly 180 can be mounted on the second armrest tube 125 and/or the third armrest tube 126. Therefore, when each armrest tube mechanism 120 switches between the extended position and the retracted position, each third protective assembly 180 can be used to shield the fourth shear-clamping area α1 formed between the second armrest tube 125 and the third armrest tube 126 (see Figure 34 ). In this way, when folding this type of bed frame 10, the child's crib cover 1200 or hands can be prevented from accidentally entering the fourth shearing and clamping area α1.

The present application also provides a bed frame 10 (not shown in the figure), which includes a plurality of columns 110 and a plurality of handrail tube mechanisms 120. The plurality of columns 110 are arranged at intervals along the circumferential direction, and a handrail tube mechanism 120 is movably connected between every two adjacent columns 110. Specifically, for the entire bed frame 10, the handrail tube mechanism 120 includes the handrail tube mechanism 120 in the fourth embodiment described above, and also includes the handrail tube mechanism 120 in the fifth embodiment described above. In other words, the bed frame 10 can also be regarded as similar to the bed frame 10 shown in the third embodiment described above, the only difference being that each first handrail tube 122 in the first handrail tube group 121 is a straight tube, and the second handrail tube 125 and the third handrail tube 126 in the second handrail tube group 124 are both straight tubes; and the rotating connection mechanism 123 is omitted. The two first armrest tubes 122 in the first armrest tube assembly 121 are directly hinged; the second armrest tube 125 and the third armrest tube 126 in the second armrest tube assembly 124 are directly hinged. Furthermore, because each armrest tube mechanism 120 of the bed frame 10 is also equipped with a third protective assembly 180, the third protective assembly 180 can still prevent the child's crib cover 1200 from being pinched or prevent hands from being pinched during folding. In summary, depending on the type of bed frame 10, different types of protective assemblies (such as the first protective assembly 160, the second protective assembly 170, or the third protective assembly 180) can be selectively installed on the armrest tubes of the bed frame 10. When each armrest tube mechanism 120 switches between the extended and retracted positions, each protective assembly is used to shield the shear-pinching area (such as the first shear-pinching area 127, the second shear-pinching area 128, the third shear-pinching area 129, and the fourth shear-pinching area α1) formed between two of the corresponding pair of armrest tubes. This prevents the child's crib coverings or hands from being entrapped.

On the one hand, the bed frame 10 and the crib 1000 proposed in this application have at least the following technical effects: in the bed frame 10 and the crib 1000 of this application, by movably connecting the armrest tube mechanism 120 between the first column 111 and the second column 112, the armrest tube mechanism 120 can have an extended position and a folded position, and when the armrest tube mechanism 120 is in the folded position, the entire bed frame 10 can be in a folded state, so that the volume of the bed frame 10 is reduced for easy storage and transportation. When the armrest tube mechanism 120 is in the deployed position, it is at least partially parallel to the horizontal plane. Therefore, when the armrest tube mechanism 120 is in the deployed position, the crib cover (e.g., a fabric cover) attached to the crib tends to be flat, ensuring a better fit with the armrest tube mechanism 120 and, in turn, giving the bed frame 10 covered with the cover a neater appearance. In other words, when the bed frame and the crib 1000 including the same are deployed, the upper surface of the armrest tube component is flat, ensuring that the crib cover attached to the bed frame is more snug and level.

On the other hand, the bed frame 10 and the crib 1000 proposed in the present application have at least the following technical effects: In the bed frame 10 and the crib 1000 of the present application, no matter how the bed frame 10 is constructed (for example, the upper end of the armrest tube mechanism 120 is flat, or the first armrest tube 122, the second armrest tube 125 and the third armrest tube 126 can all be straight tubes, etc.), the shearing and clamping areas can be shielded by providing a protective component (for example, providing a first protective component 160 to shield the first shearing and clamping areas). The second protective assembly 170 is provided in the clamping area 127 to shield the second and third shear clamping areas 128 and 129, or the protective assembly 180 is provided to shield the fourth shear clamping area (α1). This prevents the crib cover 1200 from entering the shear clamping area when the user folds the bed frame 10, thereby preventing the bed frame 10 from folding smoothly. It also prevents the user's hand from accidentally entering the shear clamping area, thereby preventing possible injuries.

Referring back to Figures 1 to 4 , the crib cover 1200 of the crib 1000 may include a generally rectangular bottom support piece 1210 and four side support pieces 1220 connected to the four sides of the bottom support piece 1210. The shape of the bottom support piece 1210 is compatible with the horizontal cross-sectional shape of the bed frame 10 in the deployed state. For example, in this embodiment, the horizontal cross-sectional shape of the bed frame 10 in the deployed state and the bottom support piece 1210 are both rectangular. More specifically, each side support piece 1220 is connected between the corresponding first column 111 and second column 112, i.e., a side support piece 1220 is connected between each first column 111 and each second column 112. The bottom support plate 1210 is connected to the two first columns 111 and the two second columns 112. The bottom support plate 1210 and the four side support plates 1220 together form a receiving cavity.

In some embodiments, the crib cover 1200 may further include a protective member 1230. The protective member 1230 is connected to one end of each side support piece 1220, distal from the bottom support piece 1210, and is mounted on each armrest tube structure 120. By connecting the bottom support piece 1210 and the side support pieces 1220 to the bed frame 10, a space within the crib 1000 is defined, allowing children to play. Furthermore, mounting the protective member 1230 on the armrest tube structure 120 prevents the armrest tube structure 120 from being exposed, potentially causing bumps and entrapment, while also enhancing the aesthetics of the crib 1000. The protective member 1230 may be made of a flexible material. For example, the protective member 1230 may be a cloth cover.

In some embodiments, the side support panels 1220 are, for example, sheets of fabric or mesh, without specific limitation. Furthermore, when the side support panels 1220 are mesh, they can be rendered transparent, allowing the user to readily observe the child within the bed frame 10.

Furthermore, in some embodiments, an operating member 1300 is provided approximately in the center of the bottom support plate 1210 (as shown in Figures 1, 2, and 41). For example, the operating member 1300 may be a structure such as a webbing, a rope, or a loop (such as a rigid pull ring, a handle, or a hook). In this embodiment, the operating member 1300 may be a webbing pull ring. The operating member 1300 can be operated to switch the bed frame 10 from the extended state to the retracted state.

To switch the crib 1000 from the expanded state to the collapsed state, the user presses the operating end 1511 to release the locking member 151. The user then pulls the operating member 1300 upward or pushes or pulls the sliding member 140 in the F1 direction. This allows the armrest tube mechanism 120, top angle 130, and sliding member 140 to cooperate and bring the first and second upright posts 111, 112 of the bed frame 10 closer together, folding the crib 1000.

Referring to Figures 1 to 4 and Figures 41 and 43 , in some embodiments, the crib 1000 further includes a hammock 200. The hammock 200 is detachably connected to the bed frame 10 and mounted within the bed frame 10. Of course, in some alternative embodiments, the hammock 200 can also be fixedly connected to the bed frame 10. In one embodiment of the present application, the hammock 200 can be accommodated within a receiving cavity enclosed by a bottom support piece 1210 and four side support pieces 1220.

Referring to Figure 1 , in one embodiment, the hammock 200 is provided with an operating port 201, which is located opposite an operating member 1300. To switch the crib 1000 from the deployed state to the collapsed state, the user can extend their hand through the operating port 201 and pull upward on the operating member 1300. The upward movement of the operating member 1300 causes the bottom support plate 1210 to retract upward, which in turn causes the four uprights to retract, thereby converting the crib 1000 to the collapsed state. When the crib 1000 is deployed, a mattress can be placed inside the hammock 200 to shield the operating port 201, making it easier to carry a child. When folded, the hammock 200 and the crib both have a relatively small size, making them easy to store and transport.

Specifically, as shown in Figures 41 and 43, the hammock 200 includes a hammock cover 210 and a support assembly 220 supported at the bottom of the hammock cover 210. The hammock cover 210 includes a generally rectangular bottom cover 211 and four side covers 212 connected to the four sides of the bottom cover 211. The bottom cover 211 and the four side covers 212 enclose a storage chamber 230 for accommodating a mattress 300 and a baby. In this embodiment, the four side covers 212 are detachably connected to the four side support panels 1220 via zippers 240. In other embodiments, the four side covers 212 can be removably connected to the four side support plates 1220 via buttons, Velcro, or other methods, or can be directly fixedly connected. A first opening 2111 is provided approximately in the middle of the bottom cover 211, opposite the operating member 1300. In this embodiment, the hammock cover 210 is made entirely of mesh material, making the entire hammock 200 more lightweight and breathable. In other embodiments, the hammock cover 210 can also be made of other lightweight, breathable non-mesh materials.

Specifically, as shown in Figures 43 to 45, the support assembly 220 includes a pivot seat 221 and a plurality of support tube groups 222 circumferentially pivoted to the pivot seat 221. In this embodiment, the pivot seat 221 is a generally annular structure, and a second opening 2211 is formed in the middle of the pivot seat 221. The second opening 2211 is opposite to the first opening 2111 and the operating member 1300, that is, the operating port 201 of the present application may include the second opening 2211 and the first opening 2111. The operator can operate the operating member 1300 through the second opening 2211 and the first opening 2111. The pivot seat 221 includes a first surface 2212 facing away from the bottom cover 211 (as shown in Figure 45) and a second surface 2213 facing the bottom cover 211 (as shown in Figure 46). The second surface 2213 of the pivot base 221 is surrounded by a plurality of pivot assemblies 2214. Each pivot assembly 2214 comprises two spaced-apart pivot elements 2214a. In this embodiment, there are four pivot assemblies 2214, corresponding to four sets of support tube assemblies 222, each pivoted to one of the four pivot assemblies 2214.

Furthermore, when the hammock 200 is in the unfolded position, the length of each support tube assembly 222 is shorter than the length of each upright column 110. This shortens the length of each support tube assembly 222 and reduces the gravitational moment acting on each support tube assembly 222, thereby improving the support stability of the entire support assembly 222.

Specifically, each supporting tube assembly 222 includes multiple interconnected tube segments that are capable of at least partially retracting into one another. It should be understood that the term "multiple" herein refers to at least two. In this embodiment, as shown in Figures 43 to 45 , each supporting tube assembly 222 includes a supporting inner tube 2221 and a supporting outer tube 2222 that is slidably sleeved onto the outer portion of the supporting inner tube 2221. The supporting inner tube 2221 has a first end 2221a and a second end 2221b, and the supporting outer tube 2222 has a third end 2222a and a fourth end 2222b. The first end 2221a of the supporting inner tube 2221 is pivotally connected to the corresponding pivot assembly 2214. The second end 2221b of the supporting inner tube 2221 is inserted into the supporting outer tube 2222 via the third end 2222a of the corresponding supporting outer tube 2222 and is slidably connected to the supporting outer tube 2222. The fourth end 2222b of the supporting outer tube 2222, which is farthest from the pivot seat 221, is connected to the hammock cover 210. In other embodiments not shown, each support tube assembly 222 includes a first tube segment, a second tube segment, and a third tube segment connected sequentially from near the pivot base 221 toward the pivot base 221. The second tube segment can be folded and retracted with the first tube segment, or the second tube segment can be folded and retracted with the third tube segment. Of course, the present application is not limited to this, and the support tube assembly 222 can also be retracted by other means besides sliding or folding.

In this embodiment, as shown in Figures 43 and 44, the fourth ends 2222b of the four support tube assemblies 222 are respectively connected to the four top corners of the bottom covering 211. Specifically, sleeves 2112 are respectively provided at the four top corners of the bottom covering 211, extending toward the center of the bottom covering 211. In this embodiment, the sleeves 2112 are sewn onto the bottom covering 211 using the same mesh material as the bottom covering 211. The supporting outer tube 2222 of each support tube assembly 222 is inserted into the sleeve 2112 and fixedly connected to the sleeve 2112 by fasteners 2113 such as drawstrings. In this embodiment, the length of the sleeve 2112 is the same as the length of the supporting outer tube 2222. This arrangement prevents the sleeve 2112 from being too long and affecting the extension and contraction of the support tube assembly 222. It also ensures that the sleeve 2112 is of sufficient length to prevent the outer support tube 2222 from swaying erratically as the support tube assembly 222 is folded or unfolded, thereby preventing the outer support tube 2222 from affecting the folding and unfolding process.

As shown in Figures 45 to 47, the support tube assembly 222 can switch between an extended state and a shortened state. In this embodiment, the extended state of the support tube assembly 222 refers to a state in which the first end 2221a of the inner support tube 2221 and the fourth end 2222b of the outer support tube 2222 are at their farthest distance from each other, while the shortened state of the support tube assembly 222 refers to a state in which the first end 2221a of the inner support tube 2221 and the fourth end 2222b of the outer support tube 2222 are at their closest distance from each other. When the support tube assembly 222 is in the extended state, the inner support tube 2221 at least partially extends beyond the outer support tube 2222. When the support tube assembly 222 is in the shortened state, the inner support tube 2221 is retracted within the outer support tube 2222, meaning that the inner support tube 2221 is completely recessed within the outer support tube 2222. Of course, in other embodiments, the inner support tube 2221 need not be completely recessed within the outer support tube 2222; that is, the inner support tube 2221 may be partially recessed within the outer support tube 2222. When the support tube assembly 222 is in the shortened state, the distance between the first end 2221a of the inner support tube 2221 and the fourth end 2222b of the outer support tube 2222 is less than the distance between the two when the support tube assembly 222 is in the extended state.

In this embodiment, both the inner and outer tubes are hollow tubular structures. The length of the outer supporting tube 2222 is greater than or equal to the length of the inner supporting tube 2221. Therefore, when the supporting tube assembly 222 is in the shortened state, the inner supporting tube 2221 is completely retracted within the outer supporting tube 2222. In this embodiment, the length of the outer supporting tube 2222 is slightly greater than the length of the inner supporting tube 2221 to ensure that the inner supporting tube 2221 is fully retracted within the outer supporting tube 2222. In other embodiments, the lengths of the outer supporting tube 2222 and the inner supporting tube 2221 can also be adjusted based on the size of the crib and the degree of folding. As shown in Figures 48 and 49, when the crib is in the folded state, the multiple support tube assemblies 222 pivot relative to the pivot seat 221 to a position generally located below the pivot seat 221. At the same time, the support tube assemblies 222 switch to the retracted state, thereby reducing the size of the crib and facilitating storage and transportation. The hammock 200 is installed in the bed frame 10, and the hammock 200 can switch between the expanded state and the folded state. One or more armrest tube mechanisms 120 of the bed frame 10 can constitute the top side frame 1110 of the bed frame 10. When the hammock 200 is in the folded state, the folded height of the support assembly 220 is lower than the height of the highest point of the top side frame 1110. That is, the length of the supporting outer tube 2222 is less than or equal to the vertical distance from the bottom covering 211 to the highest point of the top frame 1110 when the hammock 200 is in the unfolded state. This reduces the overall height of the crib when folded.

The following describes the structure of one support assembly 220 in more detail, taking it as an example: As shown in Figures 50 and 51, support assembly 220 also includes an anti-contact assembly 223, which is positioned between the inner support tube 2221 and the outer support tube 2222 to prevent direct contact between them. Specifically, anti-contact assembly 223 includes a first anti-contact member 2231 positioned on the inner support tube 2221 and a second anti-contact member 2232 positioned on the outer support tube 2222. Both the first anti-contact member 2231 and the second anti-contact member 2232 are at least partially positioned between the inner support tube 2221 and the outer support tube 2222.

The contact prevention assembly 223 is designed so that only the first contact prevention component 2231 contacts the outer support tube 2222, and only the second contact prevention component 2232 contacts the inner support tube 2221. This prevents direct contact between the inner support tube 2221 and the outer support tube 2222, minimizing the contact area and ensuring smooth sliding. Both the first and second contact prevention components 2231 and 2232 can be made of plastic, reducing friction with the inner support tube 2221 or the outer support tube 2222, ensuring smoother relative sliding between the inner support tube 2221 and the outer support tube 2222.

As shown in Figures 54 and 55, the first anti-contact member 2231 includes a first inserting portion 2231a and a first abutting portion 2231b that are connected to each other. The first inserting portion 2231a is a roughly cylindrical structure, and a first engaging finger 2231c is provided on the side wall of the first inserting portion 2231a. The first abutting portion 2231b is a roughly conical structure with a radial dimension larger than the first inserting portion 2231a. The first abutting portion 2231b is integrally formed with the first inserting portion 2231a, and the first abutting portion 2231b seals one end of the first inserting portion 2231a. The first abutting portion 2231b is fixed to one end of the first inserting portion 2231a and seals one end of the first inserting portion 2231a. A first engaging hole 2221c is provided on the supporting inner tube 2221. When the first contact protection member 2231 is installed on the supporting inner tube 2221, the first insertion portion 2231a is inserted into the supporting inner tube 2221 through the second end 2221b of the supporting inner tube 2221, and the first engaging finger 2231c engages with the first engaging hole 2221c, thereby securing the first contact protection member 2231 to the supporting inner tube 2221. The first abutting portion 2231b is located outside the supporting inner tube 2221 and seals the second end 2221b of the supporting inner tube 2221. The radial dimension of the first abutting portion 2231b is larger than the outer diameter of the supporting inner tube 2221.

As shown in Figure 55, the second contact protection member 2232 includes a second insertion portion 2232a and a second abutment portion 2232b that are interconnected. The second insertion portion 2232a is generally cylindrical in structure, and a second engaging finger 2232c is provided on the sidewall of the second insertion portion 2232a. The second abutment portion 2232b is generally a boss structure integrally formed on one end of the first insertion portion 2231a. Alternatively, the second abutment portion 2232b is generally a boss structure fixed to one end of the first insertion portion 2231a. The supporting outer tube 2222 is provided with a second engaging hole 2222c (see Figures 48 and 49). When the second contact protection member 2232 is installed on the supporting outer tube 2222, the second insertion portion 2232a is inserted into the supporting outer tube 2222 via the third end 2222a of the supporting outer tube 2222, and the second engaging finger 2232c engages with the second engaging hole 2222c, thereby securing the second contact protection member 2232 to the supporting outer tube 2222.

Furthermore, as shown in Figures 50 and 51 , the fourth end 2222b of the supporting outer tube 2222 is further provided with an end cap 224. The end cap 224 is at least partially inserted into the supporting outer tube 2222 to seal the supporting outer tube 2222.

Furthermore, when the hammock 200 is in the unfolded position, the support tube assembly 222 is extended. When the hammock 200 is in the folded position, the support tube assembly 222 is shortened. When the support tube assembly 222 is in the extended position, as shown in Figure 51, the first abutting portion 2231b of the first anti-contact member 2231 and the second inserting portion 2232a of the second anti-contact member 2232 abut to limit the position. This not only limits the maximum extension length of the support tube assembly 222, but also prevents the inner support tube 2221 from falling out of the outer support tube 2222. When the hammock 200 is in the folded position, the first abutting portion 2231b of the first anti-contact member 2231 abuts the end cap 224 to limit the position. Of course, the third end 2222a of the supporting outer tube 2222, i.e., the end of the supporting outer tube 2222 with the second contact prevention member 2232 inserted therein, can also be brought into contact with the pivot seat 221 for limiting the position.

The following describes in detail the folding process of the crib in this embodiment: When the crib is folded, after the locking member 151 is released as described above, the four columns 110 are in the unlocked state, as shown in Figure 41. The operating member 1300 can be pulled upward through the first opening 2111 and the second opening 2211 to cause the bottom support piece 1210 to be retracted toward the operating member 1300, that is, toward the center position and pulled upward. At the same time, the bottom support piece 1210 drives the four columns 110 to be retracted toward the center position. This allows the bottom support piece 1210 to be stored between the four uprights 110 in the folded position without falling. Furthermore, the upwardly pulled bottom support piece 1210 simultaneously exerts an upward force on the pivot 221, allowing the support assembly 220 to be properly folded. Specifically, the support tube assembly 222 can pivot downward relative to the pivot 221 and, simultaneously, retract to the position shown in FIG49 under the push and pull of the bottom support piece 1210 and the bottom covering 211. Thus, the crib gradually folds from the intermediate position shown in FIG56 to the folded position shown in FIG57. When the crib is folded, as shown in Figure 58 , the mattress 300 can be wrapped around the crib and secured using the straps 310 on the mattress 300. Since the support assembly 220 is folded lower than the highest point of the top frame 1110 when the hammock 200 is folded, the folded hammock 200 is enclosed within the crib, and its highest point is lower than the top frame 1110. Therefore, the folded hammock 200 does not affect the folded dimensions of the crib, ensuring a smaller folded volume.

In an embodiment not shown, the operating member 1300 may not be provided. To fold the crib, the four uprights 110 can be unlocked and then retracted by applying external force. However, the bottom support plate 1210 may fall downward under the force of gravity, requiring manual upward pull to retract it. Furthermore, during this retraction process, the support tube assembly 222 will not automatically pivot downward and retract relative to the pivot base 221. This will hinder the folding of the crib. Therefore, the pivot base 221 must be manually lifted to allow the support tube assembly 222 to rotate and retract relative to the pivot base 221 before the crib can be folded to its full position.

In this embodiment, when the crib is folded, after the support tube assembly 222 pivots downward relative to the pivot seat 221, the inner support tube 2221 of the support tube assembly 222 can automatically slide into the outer support tube 2222, that is, the support tube assembly 222 can automatically retract to achieve a folded height of the support assembly 220 lower than the highest point of the top frame 1110. In other embodiments, when the crib is folded, after the support tube assembly 222 pivots downward relative to the pivot base 221, the inner support tube 2221 of the support tube assembly 222 does not automatically slide into the outer support tube 2222. External force is then required to slide the inner support tube 2221 into the outer support tube 2222, causing the support tube assembly 222 to retract, thereby achieving a folded height of the support assembly 220 lower than the highest point of the top frame 1110.

The crib and hammock 200 described above have at least the following technical advantages: The crib comprises a bed frame and a hammock, wherein the bed frame includes a top frame, and the hammock includes a hammock cover and a support assembly. When the hammock is installed in the bed frame, the crib can be switched between an unfolded state and a folded state. When the crib is folded, the folded height of the support assembly is lower than the highest point of the top frame, thereby making the folded hammock 200 compact and easy to store and transport.

The technical features of the above embodiments can be combined arbitrarily. To keep the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

The embodiments described above merely represent a few implementations of this application. While their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person skilled in the art could make variations and improvements without departing from the concept of this application, and these variations and improvements fall within the scope of protection of this application. Therefore, the scope of protection of this patent application shall be based on the attached patent application.

1000: Crib 1200: Crib Cover 1220: Side Support Panels 1230: Protective Parts 1300: Operating Elements 200: Hammock 201: Operating Port

Claims (10)

A bed frame, comprising: a first upright post; a second upright post disposed opposite the first upright post; and an armrest tube mechanism movably connected between the first upright post and the second upright post, the armrest tube mechanism being switchable between an extended position and a retracted position. When the armrest tube mechanism is in the extended position, the armrest tube mechanism is at least partially parallel to a horizontal plane. The armrest tube mechanism includes at least one armrest tube, each of the at least one armrest tube comprising two interconnected and angled tube sections. When the armrest tube mechanism is in the extended position, one of the two tube sections is parallel to the horizontal plane, and the other of the two tube sections extends downward from one end of the one tube section. The bed frame according to claim 1, wherein the armrest tube mechanism includes a first armrest tube group, the first armrest tube group includes a first armrest tube, the first armrest tube has a first pivot end and a first sliding end, the first pivot end is pivotally connected to one of the first column and the second column, the first sliding end is pivotally connected to the other of the second column and the first column and is slidably connected, when the armrest tube mechanism is in the expanded position, the first column and the second column are far apart from each other, and the corresponding first armrest tubes are at least partially parallel to the horizontal plane. The bed frame according to claim 2, wherein the first armrest tube includes a first tube segment and a second tube segment connected to each other and arranged at an angle, the first end of the first tube segment away from the second tube segment is the first pivot end, and the first end of the second tube segment away from the first tube segment is the first sliding end; when the armrest tube mechanism is in the expanded position, the first tube segment is parallel to the horizontal plane, and the second tube segment extends downward from the second end of the first tube segment. The bed frame according to claim 3, wherein the first armrest tube group includes two first armrest tubes, the first pivot end of one of the first armrest tubes is pivoted to the first column, and the first sliding end of one of the first armrest tubes is pivoted and slidably connected to the second column, the first pivot end of the other first armrest tube is pivoted to the second column, and the first sliding end of the other first armrest tube is slidably pivoted to the first column, and when the armrest tube mechanism is in the expanded position, the two first armrest tubes are arranged side by side in the horizontal direction and the projections of the first tube sections of the two first armrest tubes on a vertical plane parallel to the extension direction of the first tube section and perpendicular to the horizontal plane at least partially overlap. The bed frame according to claim 1, wherein the armrest tube mechanism includes a second armrest tube set, the second armrest tube set including a second armrest tube and a third armrest tube, and there are two of each of the second armrest tubes and the third armrest tube; Each of the second armrest tubes has a second pivot end and a second sliding end, the two second pivot ends pivotally connected, and the two second sliding ends are slidably mounted on the first and second upright posts, respectively, and pivotally connected to the first and second upright posts; Each of the third armrest tubes has a third pivot end and a fourth pivot end, the two third pivot ends pivotally connected, and the two fourth pivot ends pivotally connected to the first and second upright posts, respectively; When the armrest tube mechanism is in the deployed position, at least a portion of each of the second armrest tubes and at least a portion of each of the third armrest tubes are parallel to a horizontal plane. The bed frame according to claim 5, wherein: The second armrest tube comprises a third tube segment and a fourth tube segment connected and arranged at an angle, wherein the first end of the third tube segment distal to the fourth tube segment is the second pivot end, and the first end of the fourth tube segment distal to the third tube segment is the second sliding end; The third armrest tube comprises a fifth tube segment and a sixth tube segment connected and arranged at an angle, wherein the first end of the fifth tube segment distal to the sixth tube segment is the fourth pivot end, and the first end of the sixth tube segment distal to the fifth tube segment is the third pivot end; When the handrail tube mechanism is in the deployed position, each of the third tube segments and each of the fifth tube segments are located in the same horizontal plane, the fourth tube segment extends downward from the second end of the third tube segment, and the sixth tube segment extends downward from the second end of the fifth tube segment. The second handrail tube and the third handrail tube connected to the first column or the second column are arranged side by side in the horizontal direction, and the projections of the fifth tube segment and the third tube segment on a vertical plane parallel to the extension direction of the fifth tube segment and the third tube segment and perpendicular to the horizontal plane overlap. A crib comprises: a bottom support plate with an operating member disposed thereon; and a hammock disposed above the bottom support plate and comprising a support assembly, the support assembly comprising a pivot seat and a plurality of support tube assemblies circumferentially pivoted to the pivot seat. The hammock is mounted within the crib and is switchable between an expanded and collapsed position. During the transition from the expanded position to the collapsed position, the operating member is pulled upward to cause the pivot seat and the plurality of support tube assemblies to pivot relative to each other. The crib according to claim 7, wherein the hammock further includes a bottom covering located above the bottom support plate, a plurality of the support tube groups are connected to the bottom covering, the bottom covering is provided with a first opening, the pivot seat is provided with a second opening, and the first opening, the second opening and the operating member are arranged opposite to each other. The crib according to claim 7, wherein the crib further includes a top side frame located above the bottom support piece, and when the crib is in a folded state, the folded height of the support assembly is lower than the height of the highest point of the top side frame. The crib according to claim 7, wherein each of the support tube assemblies includes a support inner tube and a support outer tube slidably mounted outside the support inner tube; when the crib is in an expanded state, the support inner tube at least partially extends out of the support outer tube; when the crib is in a collapsed state, the support inner tube is retracted into the support outer tube.