TWI882280B - Support leg and baby crib - Google Patents

Abstract

The present invention provides a support leg and a baby crib. The support leg includes a main body portion, an extendable portion, an extension mechanism, and a buffer mechanism. The extendable portion is slidably connected to the main body portion and has an extended state and a retracted state relative to the main body portion. The extension mechanism is arranged between the main body portion and the extendable portion and configured to realize extension and retraction of the extendable portion. The buffer mechanism is configured to slow down an extension speed at which the extendable portion is switched from the retracted state to the extended state. The extendable portion of the support leg realizes extension and retraction relative to the main body portion through the extension mechanism, and when the extendable portion is switched from the retracted state to the extended state, the buffer mechanism can slow down the extension speed of the extendable portion, thereby preventing impact noise, also preventing hit on a user's body, increasing a safety coefficient, and improving user experience.

Description

Foot Support and Crib

The present invention relates to the technical field of cribs, and more particularly to a foot support and a crib.

In order to abut against an adult bed or to facilitate storage, the support legs of the crib are usually set to automatically pop out under the thrust of an elastic member. However, the extension speed of the support legs from the retracted state to the extended state is often too fast, which is easy to produce a knocking noise or hit the user's body, which has certain safety hazards and a poor user experience.

Based on this, it is necessary to provide a support leg and a crib, which have the function of slowing down the extension speed of the support leg to avoid generating impact noise or impacting the user.

The first aspect of the present invention provides a support foot, comprising:

Main body;

The retractable portion is slidably connected to the main body and has an extended state and a retracted state relative to the main body;

a telescopic mechanism disposed between the main body and the telescopic portion and used for realizing the extension and contraction of the telescopic portion; and

The buffer mechanism is used to slow down the extension speed of the telescopic part when it is converted from a contracted state to an extended state.

The retractable part of the supporting leg can be extended and retracted relative to the main body through a retractable mechanism. When the retractable part is converted from a retracted state to an extended state, the buffer structure can slow down the extension speed of the retractable part, thereby avoiding the generation of impact noise and avoiding impact on the user's body, thereby increasing the safety factor and improving the user experience.

In one embodiment, the main body includes a hollow sleeve shell, the telescopic part is partially located in the sleeve shell and can move relative to the sleeve shell, and the buffer mechanism includes a sliding plug, which is fixed to one end of the telescopic part in the sleeve shell, and the sliding plug is airtightly matched with the main body to form an air-containing cavity with variable volume. The sliding plug is provided with a vent hole, and the air-containing cavity is connected to the outside only through the vent hole.

In one embodiment, the main body includes a fixing member and a first guide member disposed in the sleeve shell, the fixing member is fixed to the sleeve shell, one end of the first guide member is connected to the fixing member, and the first guide member is disposed along the extension and contraction direction of the telescopic portion, the sliding plug has a first receiving groove disposed along the extension and contraction direction of the telescopic portion, the first guide member can be partially accommodated in the first receiving groove, the first guide member is airtightly matched with the groove wall of the first receiving groove to form the air containing cavity, and the vent is disposed at the groove bottom of the first receiving groove.

In one embodiment, an end ring of the first guide member far from the fixing member is provided with an airtight flange, and the airtight flange is airtightly matched with the groove wall of the first accommodating groove to form the air-containing cavity.

In one embodiment, the size of the vent hole is adjustable.

In one embodiment, the main body further includes a fixing member disposed in the sleeve shell, the fixing member is fixed to the sleeve shell, and the telescopic mechanism includes a reset member, two ends of the reset member are respectively against the fixing member and the sliding plug.

In one embodiment, a second guide member is further provided in the main body and arranged along the extension and contraction direction of the extension and contraction portion. One end of the second guide member is connected to the fixing member, and the reset member is sleeved on the second guide member.

In one embodiment, the sliding plug has a second receiving groove arranged along the extension and contraction direction of the extension portion, the second guide member can be partially received in the second receiving groove, and the two ends of the reset member are respectively against the fixing member and the bottom of the second receiving groove.

In one embodiment, the supporting leg further comprises a locking mechanism for limiting the telescopic portion to an extended state.

In one embodiment, the locking mechanism includes a first mating piece provided on the sliding plug and a second mating piece provided on the fixing piece, the first mating piece and the second mating piece are slidably matched, one of the first mating piece and the second mating piece is provided with a resistance part, and the other of the first mating piece and the second mating piece needs to overcome the resistance of the resistance part to realize the conversion of the telescopic part from the extended state to the contracted state.

In one embodiment, the first matching member is a sliding member having a guide groove, the second matching member is a guide column slidably matched with the guide groove, and the resistance portion is arranged on the sliding member.

In one embodiment, when the retractable portion is in an extended state, when the retractable portion is subjected to force, the guide column squeezes the resistance portion to cause elastic deformation and transition to a retracted state.

In one embodiment, the sliding member has a sliding body and an elastic sheet, the sliding body and the elastic sheet enclose the guide groove, one end of the elastic sheet is connected to the sliding body, the other end of the elastic sheet is spaced from the sliding body to form a gap, and the resistance portion is provided at one end of the elastic sheet close to the gap.

In one embodiment, the resistance portion is a blocking protrusion disposed on the elastic sheet and extending toward the guide groove.

In one embodiment, the retractable parts are disposed on both sides of the main body, and the retractable mechanism and the buffer mechanism are disposed between the main body and the retractable parts located on both sides of the main body.

In one embodiment, the sliding plug of the buffer mechanism located on both sides of the main body is airtightly matched with the main body to form an air-containing cavity with a variable volume. The sliding plug located on both sides of the main body is provided with the vent hole, and the air-containing cavity is connected to the outside only through the vent hole.

The second aspect of the present invention provides a crib, comprising a bed body, at least one column and at least one supporting leg mentioned above, wherein two ends of the column are respectively connected to the bottom of the bed body and the top of the supporting leg.

In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the attached drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the present invention and do not limit the scope of protection of the present invention.

It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be a component centered thereon. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a component centered thereon at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention pertains. The terms used herein in the specification of the present invention are only for the purpose of describing specific implementations and are not intended to limit the present invention. The term "and/or" used herein includes any and all combinations of one or more of the related listed items.

As shown in FIG. 1 , an embodiment of the present invention provides a crib, which includes a bed body 100, at least one upright column 200, and at least one supporting leg 300. The crib has a function of slowing down the extension speed of the supporting leg 300 to avoid generating a knocking noise or knocking to the user.

Specifically, as shown in FIG. 1 , the bed body 100 has a storage space 110 for accommodating a baby. One end of the column 200 is connected to the bottom of the bed body 100, and the other end is connected to the top of the supporting leg 300. In this way, the column 200 and the supporting leg 300 form a supporting structure for the bed body 100. In this embodiment, there are two columns 200 and they are respectively arranged on both sides of the length direction of the crib, and there are also two supporting legs 300. Of course, in other embodiments, the number and location of the columns 200 and the supporting legs 300 can also be adjusted as needed.

Specifically, as shown in FIGS. 2 to 7 , the support leg 300 includes a main body 310, a retractable portion 320, a buffer mechanism, a retractable mechanism, and a locking mechanism 330.

Specifically, as shown in Fig. 3, Fig. 5 and Fig. 7, the main body 310 includes a sleeve shell 311, a fixing member 312, a first guide member 313 and a second guide member 314. The sleeve shell 311 is a hollow structure, and the fixing member 312, the first guide member 313 and the second guide member 314 are all arranged in the sleeve shell 311. In this embodiment, the fixing member 312 is fixed to the approximately middle part in the sleeve shell 311. In this embodiment, the first guide member 313, the second guide member 314 and the fixing member 312 are an integrally formed structure. Of course, in other embodiments, the first guide member 313, the second guide member 314 and the fixing member 312 can also be independent parts.

Specifically, as shown in FIG. 3 , the first guide member 313 is roughly in the shape of a rod, one end of the first guide member 313 is fixed to the fixing member 312, and the first guide member 313 is arranged along the extension direction of the extension portion 320 (i.e., the horizontal direction in this embodiment). An airtight flange 313a is arranged around one end of the first guide member 313 away from the fixing member 312. In this embodiment, there are two first guide members 313 and they are symmetrically fixed to the left and right sides of the fixing member 312. Of course, in other embodiments, the number and arrangement position of the first guide members 313 can also be adjusted according to actual needs.

Specifically, as shown in FIG. 3 , the second guide member 314 is roughly in the shape of a rod, one end of the second guide member 314 is fixed to the fixing member 312, and the second guide member 314 is arranged along the extension direction of the extension portion 320. In this embodiment, there are two second guide members 314 that are symmetrically fixed to the left and right sides of the fixing member 312, and the two second guide members 314 are respectively located below the two first guide members 313. Of course, in other embodiments, the number and arrangement positions of the second guide members 314 can also be adjusted according to actual needs, and the relative positions of the second guide members 314 and the first guide members 313 can also be adjusted according to needs, for example, the first guide member 313 can be located below the second guide member 314, etc.

Specifically, as shown in FIG. 2 and FIG. 3 , the telescopic portion 320 is generally a hollow tubular structure, and the telescopic portion 320 is partially located in the sleeve shell 311 and can move relative to the sleeve shell 311. In this embodiment, there are two telescopic portions 320, and the two telescopic portions 320 are respectively partially located in the sleeve shell 311 and can respectively move relative to the sleeve shell 311. A roller 321 is provided at one end of each telescopic portion 320 away from the sleeve shell 311 to facilitate the movement of the crib.

Specifically, as shown in FIG. 2, FIG. 3 and FIG. 8, the buffer mechanism includes a sliding plug 340, and the sliding plug 340 is fixed to one end of the telescopic portion 320 located in the sleeve housing 311. The sliding plug 340 includes a first accommodating portion 341, a second accommodating portion 342 and a connecting portion 343 connected between the first accommodating portion 341 and the second accommodating portion 342. The first accommodating portion 341 is provided with a first accommodating groove 341a arranged along the telescopic direction of the telescopic portion 320, and the second accommodating portion 342 is provided with a second accommodating groove 342a arranged along the telescopic direction of the telescopic portion 320. During the retraction process of the telescopic portion 320, as shown in FIG. 7 and FIG. 5 to FIG. 3, the first guide member 313 is gradually inserted into the first receiving groove 341a, and the second guide member 314 is gradually inserted into the second receiving groove 342a. Such a configuration can play a certain guiding role for the movement of the telescopic portion 320. The airtight flange 313a is airtightly matched with the groove wall of the first receiving groove 341a to form a variable volume air chamber 350. The groove bottom of the first receiving groove 341a has a vent hole 341b connected to the air chamber 350.

As shown in FIG. 3 and FIG. 8 , the outer periphery of the sliding plug 340 near the notch of the first receiving groove 341a and the second receiving groove 342a is provided with abutment boss 344. The end of the telescopic part 320 located in the sleeve housing 311 has a mounting opening 322, and the sliding plug 340 is partially inserted into the telescopic part 320 through the mounting opening 322. The abutment boss 344 is located outside the telescopic part 320, and the side of the abutment boss 344 away from the fixing member 312 abuts against the wall of the mounting opening 322.

Furthermore, the size of the vent 341b is adjustable. For example, a movable baffle (not shown) may be provided at the vent 341b to adjust the size of the vent 341b by adjusting the range of the baffle covering the vent 341b. Of course, the size of the vent 341b may also be adjusted by other methods.

In this embodiment, as shown in FIG. 2 and FIG. 3 , sliding plugs 340 are fixed on the telescopic parts 320 on both sides of the main body 310. Thus, the sliding plugs 340 on both sides of the main body 310 are airtightly matched with the airtight flanges 313a on the corresponding first guide members 313 to form a variable volume air chamber 350. The sliding plugs 340 on both sides are provided with vent holes 341b, and the air chamber 350 is connected to the outside only through the vent holes 341b.

Thus, when the telescopic portion 320 is transformed from the contracted state to the extended state relative to the main body 310 (as shown in FIGS. 3, 5 to 7), the sliding plug 340 located on one side (or both sides) of the main body 310 moves with the telescopic portion 320 in a direction away from the fixing member 312, so that the volume of the air-containing cavity 350 becomes larger, and the air pressure in the air-containing cavity 350 is less than the external atmospheric pressure, that is, negative pressure is generated in the air-containing cavity 350, which forms resistance to the extension of the telescopic portion 320 on one side (or both sides) of the main body 310, thereby preventing the extension of the telescopic portion 320 from moving forward. The extension speed of the telescopic part 320 on one side (or both sides) of the main body 310 is slowed down, and during this process, the outside air gradually enters the air chamber 350 through the vent holes 341b on the sliding plug 340 on both sides of the main body 310 to gradually reduce the negative pressure in the air chamber 350, so that the telescopic part 320 on one side (or both sides) of the main body 310 is fully extended at a relatively uniform speed under the action of the dynamically balanced air pressure environment of the air chamber 350, as shown in Figures 6 and 7. In this way, it is possible to avoid the generation of knocking noise or knocking on the user due to the telescopic part 320 extending too fast. At the same time, by adjusting the size of the vent hole 341b, the air intake speed of the air intake hole can be adjusted, thereby adjusting the extension speed of the telescopic part 320 according to the needs of the user.

Of course, the structure of the buffer mechanism is not limited to this and can also be in other forms.

Specifically, as shown in FIG. 2 and FIG. 3 , the telescopic mechanism includes a reset member 360. Optionally, the reset member 360 is a spring. Of course, in other embodiments, the reset member 360 may also be other elastic components, such as a rubber column. In this embodiment, the spring is sleeved on the second guide member 314, and one end of the spring abuts against the fixing member 312, and the other end abuts against the bottom of the second receiving groove 342a. In this way, when, for example, the crib needs to be spliced with a large bed and used as a bedside bed, the telescopic portion 320 abuts against the large bed and retracts toward the main body 310, so that the reset member 360 undergoes elastic deformation, as shown in FIG. 2 and FIG. 3 . When the crib does not need to be connected to the big bed and is moved away from the big bed, the retractable portion 320 automatically extends under the action of the reset member 360, as shown in Figures 6 and 7. In this embodiment, there are two reset members 360, which are respectively sleeved on the second guide members 314 located on both sides of the fixing member 312, so as to realize the automatic pop-up of the retractable portions 320 on both sides of the main body 310.

Of course, in other embodiments, the first guide member 313 and the second guide member 314 may be of the same structure, and the first receiving portion 341 and the second receiving portion 342 may be of the same structure, that is, only one guide member is required to be provided on one side of the fixing member 312, and only one receiving portion is required to be provided on the sliding plug 340. In this way, the structure of the supporting leg 300 can be simplified, and the manufacturing difficulty can be reduced.

Specifically, as shown in FIG. 3, FIG. 5 and FIG. 7, the locking mechanism 330 includes a first matching member and a second matching member. In this embodiment, the first matching member is a sliding member 331, which is generally a long strip structure and is arranged along the extension direction of the extension portion 320, and one end of the sliding member 331 is connected to the sliding plug 340. In this embodiment, the sliding member 331 and the sliding plug 340 are an integrally formed structure. Of course, in other embodiments, the sliding member 331 and the sliding plug 340 can also be two independent components. The sliding member 331 includes a sliding body 331a and an elastic sheet 331b, wherein the sliding body 331a and the elastic sheet 331b enclose a guide groove 331c, one end of the elastic sheet 331b is connected to the sliding body 331a, and the other end of the elastic sheet 331b is spaced apart from the sliding body 331a to form a notch 331d, and a resistance portion is provided at one end of the elastic sheet 331b close to the notch 331d. In this embodiment, the resistance portion is a blocking protrusion 331e provided on the elastic sheet 331b and extending toward the guide groove 331c. Of course, in other embodiments, the resistance portion may also be other structures. The second matching member is a guide post 332 that is slidably matched with the guide groove 331c, and the guide post 332 is provided on the fixing member 312.

When the telescopic portion 320 extends outward, the sliding member 331 moves relative to the fixed member 312, so that the guide post 332 and the guide groove 331c slide relative to each other until the guide post 332 and the blocking protrusion 331e are abutted. At this time, the guide post 332 presses the blocking protrusion 331e under the elastic force of the reset member 360, causing the blocking protrusion 331e to deform, and then the guide post 332 enters the left end of the guide groove 331c and is blocked by the blocking protrusion 331e that has restored its deformation at the left end of the guide groove 331c, so that the telescopic portion 320 is locked in the extended state, as shown in Figures 6 and 7. When the retractable portion 320 needs to be switched from the extended state to the retracted state, a certain external force needs to be applied to the retractable portion 320 so that the guide pillar 332 overcomes the resistance of the blocking protrusion 331e and releases the lock of the retractable portion 320, so that the retractable portion 320 can be retracted to a suitable degree to counteract the large bed, etc., as shown in Figures 2 to 5. Of course, in other embodiments, the locking mechanism 330 can also be in other forms.

In summary, the specific working principles of the above-mentioned foot support 300 and the crib are as follows:

When the crib needs to be spliced with a large bed or the retractable portion 320 needs to be retracted relative to the main body 310 in other situations, a certain external force needs to be applied to the retractable portion 320 on one side (or both sides) of the main body 310 so that the guide post 332 overcomes the resistance of the blocking protrusion 331e and releases the lock of the retractable portion 320. The retractable portion 320 on one side (or both sides) of the main body 310 retracts into the main body 310 under the abutment of the large bed or other objects, causing the reset member 360 to undergo elastic deformation, as shown in FIGS. 2 and 3.

When the crib does not need to be spliced with the big bed, is moved away from the big bed or in other situations, when the retractable portion 320 needs to be extended relative to the main body 310, the retractable portion 320 located on one side (or both sides) of the main body 310 is released from the contact with the big bed, and the retractable portion 320 moves away from the fixed portion 312 under the elastic force of the reset member 360, and at the same time drives the corresponding sliding plug 340 to move in the same direction, so that the volume of the air chamber 350 becomes larger, and the air pressure in the air chamber 350 is less than the external atmospheric pressure, that is, negative pressure is generated in the air chamber 350, which forms a negative pressure on the extension of the retractable portion 320 on one side (or both sides) of the main body 310. Resistance is generated, so the extension speed of the telescopic portion 320 located on one side (or both sides) of the main body 310 is slowed down, and in this process, the outside air gradually enters the air chamber 350 through the vents 341b on the sliding plug 340 on both sides of the main body 310 to gradually reduce the negative pressure in the air chamber 350, so that the telescopic portion 320 located on one side (or both sides) of the main body 310 is fully extended at a relatively uniform speed under the action of the dynamically balanced air pressure environment of the air chamber 350, so that the impact noise or impact on the user due to the telescopic portion 320 extending too fast can be avoided. Under the elastic force of the reset member 360, the guide post 332 then presses against the blocking protrusion 331e, causing the blocking protrusion 331e to deform, and then the guide post 332 enters the left end of the guide groove 331c and is blocked by the blocking protrusion 331e that has restored its deformation at the left end of the guide groove 331c, so that the telescopic portion 320 is locked in the extended state, as shown in Figures 6 and 7.

The above-mentioned foot support 300 and crib have at least the following technical effects:

The retractable portion 320 of the supporting leg 300 can be extended and retracted relative to the main portion 310 through a retractable mechanism. When the retractable portion 320 is converted from a retracted state to an extended state, the buffer mechanism can slow down the extension speed of the retractable portion 320, thereby avoiding the generation of impact noise and avoiding impact on the user's body, thereby increasing the safety factor and improving the user experience.

The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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 above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it should not be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be based on the attached claims.

100: bed body 110: storage space 200: column 300: support leg 310: main body 311: sleeve shell 312: fixing member 313: first guide member 313a: airtight flange 314: second guide member 320: telescopic part 321: roller 322: installation opening 330: locking mechanism 331: sliding member 331a: sliding main body 331b: elastic sheet 331c: guide groove 331d: notch 331e: blocking protrusion 332: guide column 340: sliding plug 341: first storage part 341a: first storage groove 341b: vent hole 342: second storage portion 342a: second storage groove 343: connection portion 344: abutment boss 350: air storage chamber 360: reset member

FIG. 1 is a schematic diagram of the structure of a crib according to an embodiment of the present invention. FIG. 2 is a partial sectional view of the side of FIG. 1, in which the retractable portion is in a fully retracted state relative to the main body. FIG. 3 is an enlarged view of point A in FIG. 2. FIG. 4 is another partial sectional view of the side of FIG. 1, in which the retractable portion is in a partially retracted state relative to the main body. FIG. 5 is an enlarged view of point B in FIG. 4. FIG. 6 is another partial sectional view of the side of FIG. 1, in which the retractable portion is in a fully extended state relative to the main body. FIG. 7 is an enlarged view of part C in FIG. 6. FIG. 8 is a three-dimensional view of the sliding plug in FIG. 2.

100: bed body 300: support leg 310: main body 320: telescopic part 321: roller 330: locking mechanism 340: sliding plug 350: air chamber 360: reset part

Claims (16)

A support leg comprises: a main body, comprising a hollow sleeve shell; a telescopic part, slidably connected to the main body, having an extended state and a contracted state relative to the main body, the telescopic part is partially located in the sleeve shell and can move relative to the sleeve shell; a telescopic mechanism, disposed between the main body and the telescopic part and used to realize the extension and contraction of the telescopic part; and The buffer mechanism is used to slow down the extension speed of the telescopic part when it changes from the contracted state to the extended state. The buffer mechanism includes a sliding plug, which is fixed to one end of the telescopic part in the sleeve shell. The sliding plug and the main body are airtightly matched to form a variable volume air chamber. The sliding plug is provided with a vent hole, and the air chamber is connected to the outside only through the vent hole. A supporting leg as described in claim 1, wherein the main body includes a fixing member and a first guide member disposed in the sleeve shell, the fixing member is fixed to the sleeve shell, one end of the first guide member is connected to the fixing member, and the first guide member is disposed along the extension and contraction direction of the telescopic portion, the sliding plug has a first receiving groove disposed along the extension and contraction direction of the telescopic portion, the first guide member can be partially accommodated in the first receiving groove, the first guide member is airtightly matched with the groove wall of the first receiving groove to form the air containing cavity, and the vent is disposed at the groove bottom of the first receiving groove. A supporting leg as described in claim 2, wherein an end ring of the first guide member away from the fixing member is provided with an airtight flange, and the airtight flange is airtightly matched with the groove wall of the first receiving groove to form the air containing cavity. A support leg as described in claim 1, wherein the size of the ventilation hole is adjustable. A supporting leg as described in claim 1, wherein the main body further includes a fixing member disposed in the sleeve shell, the fixing member is fixed to the sleeve shell, and the telescopic mechanism includes a reset member, the two ends of the reset member are respectively abutted against the fixing member and the sliding plug. As described in claim 5, the supporting leg further comprises a second guide member arranged in the main body along the extension and contraction direction of the extension part, one end of the second guide member is connected to the fixing member, and the reset member is sleeved on the second guide member. A supporting foot as described in claim 6, wherein the sliding plug has a second receiving groove arranged along the extension and contraction direction of the extension portion, the second guide member can be partially received in the second receiving groove, and the two ends of the reset member are respectively against the fixing member and the bottom of the second receiving groove. The supporting leg as described in claim 2 also includes a locking mechanism, which is used to limit the telescopic part to an extended state. A supporting foot as described in claim 8, wherein the locking mechanism includes a first fitting member provided on the sliding plug and a second fitting member provided on the fixing member, the first fitting member and the second fitting member are slidably fitted together, one of the first fitting member and the second fitting member is provided with a resistance portion, and the other of the first fitting member and the second fitting member needs to overcome the resistance of the resistance portion to realize the conversion of the telescopic portion from the extended state to the contracted state. A supporting leg as described in claim 9, wherein the first mating member is a sliding member having a guide groove, the second mating member is a guide column slidably mated with the guide groove, and the resistance portion is disposed on the sliding member. As described in claim 10, when the retractable portion is in an extended state, when the retractable portion is subjected to force, the guide column squeezes the resistance portion to cause elastic deformation and transition to a retracted state. A supporting foot as described in claim 11, wherein the sliding member has a sliding body and an elastic sheet, the sliding body and the elastic sheet enclose the guide groove, one end of the elastic sheet is connected to the sliding body, and the other end of the elastic sheet is spaced from the sliding body to form a gap, and the resistance portion is provided at one end of the elastic sheet close to the gap. A supporting foot as described in claim 12, wherein the resistance portion is a blocking protrusion provided on the elastic sheet and extending toward the guide groove. The supporting foot as described in claim 1, wherein the retractable portion is provided on both sides of the main body, and the retractable mechanism and the buffer mechanism are provided between the main body and the retractable portions located on both sides of the main body. As described in claim 14, the supporting foot, wherein the sliding plug of the buffer mechanism located on both sides of the main body is airtightly matched with the main body to form an air-containing cavity with a variable volume, and the sliding plug located on both sides of the main body is provided with the vent hole, and the air-containing cavity is connected to the outside only through the vent hole. A crib comprises a crib body, at least one upright post and at least one supporting leg as described in any one of claims 1 to 15, wherein two ends of the upright post are respectively connected to the bottom of the crib body and the top of the supporting leg.

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