CN206314886U - Folding bed - Google Patents

Abstract

The utility model discloses a folding bed, which comprises a bed frame with an unfolded state and a folded state, and a locking mechanism for locking the bed frame in the unfolded state, wherein the bed frame includes an upper enclosure frame assembly, a support frame assembly and a lower enclosure Box components. The number of rods of the folding bed is small, and it can be folded twice. After folding, all the rods can be tightly folded together. The folded structure is very compact and flat, and the space occupied is very small. Great convenience.

Description

Folding bed

technical field

The utility model relates to a folding bed.

Background technique

In the prior art, a bed frame of a folding bed usually includes a bottom frame and a surrounding frame supported on the bottom frame, and the entire bed frame can be folded when the bottom frame and the frame are folded. However, the bed frame of the current folding bed often has a large volume after being folded, which is not conducive to carrying and using when traveling.

Contents of the invention

The purpose of the utility model is to provide a folding bed with very small volume.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a folding bed, including a bed frame with an unfolded state and a folded state, a locking mechanism for locking the bed frame in the unfolded state, and the bed frame Including the upper frame assembly, the support frame assembly and the lower frame assembly,

The upper surround frame assembly includes a left upper surround frame, a right upper surround frame, and two connecting frames connected between the left upper surround frame and the right upper surround frame and located on the front and rear sides respectively. The two left upper surrounding rods on the side, the left upper side rod pivotally connected between the left ends of the two left upper surrounding rods, the right end of the left upper surrounding rod is pivotally connected to the left end of the connecting frame on the same side; The upper right surrounding frame includes two upper right surrounding rods located on the front and rear sides respectively, and a right upper side rod pivotally connected between the right ends of the two right upper surrounding rods, and the left end of the right upper surrounding rod is pivotally connected to the same side of the right upper surrounding rod. the right end of the connecting frame;

The support frame assembly includes a left support frame and a right support frame. The left support frame includes left support rods respectively located on the front and rear sides and extending in the up and down direction. The upper ends of the left support rods are pivotally connected to the same side At the left end of the connecting frame, a left connecting rod is pivotally connected between the left support rod and the left upper surrounding rod on the same side; Right strut, the upper end of the right strut is pivotally connected to the right end of the connecting frame on the same side, and a right connecting rod is also pivotally connected between the right strut and the right upper wall bar on the same side. rod;

The lower surround frame assembly includes a left lower surround frame and a right lower surround frame. The left lower surround frame includes two left lower surround rods respectively located on the front and rear sides, and a left lower side pivotally connected between the left ends of the two left lower surround rods. The left lower surrounding rod is pivotally connected to the left support rod on the same side; the right lower surrounding frame includes two right lower surrounding rods respectively located The right lower side rod between the right ends of the lower surrounding rods, the right lower surrounding rod is pivotally connected to the right support rod on the same side, and the right end of the left lower surrounding rod on the same side is connected to the right lower surrounding rod The left end of the phase rotation connection,

When the bed frame is folded, the left lower surrounding frame and the right lower surrounding frame are turned over and folded in the left and right direction and drive the left support frame and the right support frame to be folded in the left and right direction, and at the same time, the left upper surrounding frame is turned downward and After the left support frame is folded together, the right upper surrounding frame is turned down and folded together with the right support frame to realize a fold of the bed frame, the left upper surrounding bar, left support bar, The lower left side bar, the lower right side bar, the right strut bar, the upper right side bar and the connecting frame are turned over in the front and back directions together and gathered above the left upper side bar, the left lower side bar, the right lower side bar and the right upper side bar to realize Secondary folding of the bed frame.

Preferably, the left strut and the right strut can be arranged telescopically along their own length direction respectively, and a left cross bar is pivotally connected between the lower parts of the left strut on both sides, and the two sides of the left strut There is also a right cross bar pivotally connected between the lower parts of the right struts. After the bed frame is folded once, the left strut and the right strut shrink along their own lengths respectively, so that the left transverse bar After the rod is moved closer to the upper left surrounding rod and the lower left surrounding rod, and the right cross bar is moved closer to the upper right surrounding rod and the lower right surrounding rod, the left upper surrounding rod, left support rod and left lower surrounding rod on the front and rear sides The rod, the lower right surrounding rod, the right strut, the right upper surrounding rod and the connecting frame are turned over in the front and rear directions together to realize the secondary folding.

Further, the left brace includes a left upper brace, a left lower brace that can slide and expand relative to the left upper brace, and the left lower brace is pivotally connected to the left upper brace; the right brace includes a right upper brace A support rod, a right lower support rod that can slide and expand relative to the right upper support rod, and the right lower surrounding rod is pivotally connected to the right upper support rod.

Further, the left support frame also includes a left leg rod that is respectively rotatably connected to the lower end of the left support rod, and the right support frame also includes a right leg rod that is respectively rotatably connected to the lower end of the right support rod, so After the first folding of the bed frame and before the second folding, the two left outriggers are turned over and folded together with the left cross bar, and the two right outriggers are turned over and folded with the right side. The crossbars are folded together.

Preferably, the right end of the left upper wall bar and the upper end of the left brace are respectively pivotally connected to the connecting frame, and the left upper wall bar, the connecting frame, the left support rod, and the left tie rod on the same side form a A four-bar linkage mechanism; the left end of the right upper surrounding rod and the upper end of the right support rod are respectively pivotally connected to the connecting frame, and the right upper surrounding rod, connecting frame, right supporting rod and right tie rod on the same side Another four-bar linkage is formed between them.

Preferably, the connecting frame is a U-shaped bar with the opening facing downward, the right end of the left upper surrounding bar and the left end of the right upper surrounding bar are respectively inserted in the opening of the connecting frame and pivoted with the connecting frame shaft connection.

Preferably, the locking mechanism includes a locking piece arranged between the left lower surrounding bar and the right lower surrounding bar for locking the two, and there is a locking piece between the front and rear sides for locking the two The unlocking handle for simultaneous unlocking.

Preferably, when the bed frame undergoes the first folding, the ends connected to the left lower surrounding bar and the right lower surrounding bar move upward so that the left lower surrounding frame and the right lower surrounding frame are turned and folded relative to each other along the left and right direction.

Preferably, after the first folding of the bed frame and before the second folding, on the same side of the front and rear sides of the bed frame, the rotation axis of the upper left side bar relative to the upper left side bar line, the axis of rotation of the left support bar relative to the left cross bar, the axis of rotation of the left lower surrounding bar relative to the left lower side bar, the rotation axis of the right lower surrounding bar relative to the right lower side bar The axis of rotation, the axis of rotation of the right support bar relative to the right cross bar, and the axis of rotation of the upper right side bar relative to the upper right side bar extend colinearly.

Preferably, after the first folding of the bed frame and before the second folding, the upper left side bar, the lower left side bar, the lower right side bar, the upper right side bar, the left cross bar and the right cross bar Folding to the same height, on the same side of the front and rear sides of the bed frame, the rotation axis of the left upper surrounding rod relative to the left upper side rod, the rotation axis of the left support rod relative to the left cross bar, The rotation axis of the left lower surrounding rod relative to the left lower side rod, the rotation axis of the right lower surrounding rod relative to the right lower side rod, and the rotation axis of the right brace relative to the right cross bar The center line and the rotation axis of the upper right side bar relative to the upper right side bar extend parallel or co-linearly with each other.

Preferably, when the bed frame undergoes the secondary folding, the left upper surrounding bar, the left support bar, the left lower surrounding bar, the right lower surrounding bar, the right support bar, the right upper surrounding bar and the connecting frame jointly After flipping inward and gathering above the left upper side bar, left lower side bar, right lower side bar, right upper side bar, left cross bar and right cross bar, the left upper encirclement bar, left support bar, left lower encirclement bar, The right lower surrounding bar, the right support bar, the right upper surrounding bar and the connecting frame are turned inward together to be laminated.

Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art: the folding bed of the utility model has a small number of rods, and each rod can be tightly folded together after folding. It is very compact and flat, and takes up very little space, which provides great convenience for users' daily storage and storage.

Description of drawings

Accompanying drawing 1 is the three-dimensional view under the unfolded state of the children's bed of the present utility model;

Accompanying drawing 2 is the schematic diagram of the rotating shaft of each bar on the children's bed frame of the present utility model;

Accompanying drawing 3 is the front view of the children's bed of the present utility model in the unfolded state;

Accompanying drawing 4 is the three-dimensional view of the children's bed of the present utility model after being folded once;

Accompanying drawing 5 is the left side view of the children's bed of the present utility model after being folded once;

Accompanying drawing 6 is the left side view of the children's bed of the present utility model after folding the left and right support frames;

Accompanying drawing 7 is the perspective view of accompanying drawing 6;

Accompanying drawing 8 is the three-dimensional view of the children's bed of the present invention after secondary folding;

in:

1. Upper left frame; 11. Upper left rod; 12. Upper left side rod; 2. Upper right frame; 21. Upper right rod; 22. Upper right rod; 3. Connecting frame;

4, left support leg; 41, left support bar; 41a, left upper support bar; 41b, left lower support bar; 42, left cross bar; 43, left foot bar; 5, right support leg; 51, right support bar; 51a, Right upper strut; 51b, right lower strut; 52, right cross bar; 53, right leg bar;

6. Lower left frame; 61. Lower left rod; 62. Lower left side rod; 7. Lower right frame; 71. Lower right rod; 72. Lower right rod; 8. Left connecting rod; 9. Right connecting rod ; 10, locking parts.

detailed description

The technical solution of the present utility model will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

Referring to the folding bed shown in Figures 1 to 7, it includes a bed frame having an unfolded state and a folded state, a locking mechanism for locking the bed frame in the unfolded state, the bed frame includes a top frame assembly, supported on The support frame assembly and the lower enclosure assembly under the enclosure assembly.

1 to 3, the upper frame assembly includes a left upper frame 1, a right upper frame 2, and two connecting frames 3 connected between the left upper frame 1 and the right upper frame 2 and located on the front and rear sides respectively. The left upper surrounding frame 1 includes two left upper surrounding rods 11 respectively located on the front and rear sides, a left upper side rod 12 pivotally connected between the left ends of the two left upper surrounding rods 11 (rotation axes a1, a1'), and the right end of the left upper surrounding rod 11 The pivot is connected to the left end (rotating axis F, F') of the connecting frame 3 on the same side as the left upper surrounding bar 11; The right upper side bar 22 (rotating axis a2, a2') between the right ends of the right upper surrounding bar 21, the left end of the right upper surrounding bar 21 is pivotally connected to the right end (rotating axis I, I') of the connecting frame 3 on the same side of the right upper surrounding bar 21 . In this way, the upper left frame 1, the connecting frame 3 on the front side, the upper right frame 2, and the connecting frame 3 on the rear side are enclosed in a closed frame shape along the circumference.

Referring to FIGS. 1 to 3 , the support frame assembly includes a left support frame 4 and a right support frame 5 .

The left support frame 4 includes left struts 41 respectively located on the front and rear sides and extending in the up and down direction, and a left cross bar 42 pivotally connected between the left struts 41 on both sides, wherein the left strut 41 includes a left upper strut 41a, The left lower strut 41b can slide and expand relative to the left upper strut 41a, and the left cross bar 42 is pivotally connected between the lower parts of the left lower strut 41b on both sides (rotation axes a5, a5'). The upper end of the left upper strut 41a is pivotally connected to the left end (rotation axis A, A') of the connecting frame 3 on the same side, and a left connecting rod 8 is also arranged between the left upper strut 41a and the left upper surrounding bar 11 on the same side. The upper end of the connecting rod 8 is pivotally connected to the left upper wall rod 11 (rotating axes G, G'), and the lower end of the left connecting rod 8 is pivotally connected to the left upper support rod 41a (rotating axes H, H'). Like this, on each side of bedstead front and rear side, form a four-bar linkage mechanism between the left upper surrounding bar 11, the left connecting rod 8, the left upper strut 41a, the connecting frame 3.

Similarly, the right support frame 5 includes right struts 51 respectively located on the front and rear sides and extending in the up and down direction, and right cross bars 52 pivotally connected between the right struts 51 on both sides, wherein the right strut 51 includes a right upper support The rod 51a, the right lower strut 51b that can slide and expand relative to the right upper strut 51a, and the right cross bar 52 are pivotally connected between the lower parts of the right lower strut 51b on both sides (rotation axes a6, a6'). The upper end of the right upper strut 51a is pivotally connected to the right end (rotation axis E, E') of the connecting frame 3 on the same side, and a right connecting rod 9 is also arranged between the right upper strut 51a and the right upper surrounding bar 21 on the same side. The upper end of the connecting rod 9 is pivotally connected to the right upper wall bar 21 (rotating axes J, J'), and the lower end of the right connecting rod 9 is pivotally connected to the right upper strut 51a (rotating axes J, J'). Like this, on each side of bedstead front and rear side, another four-bar linkage mechanism is formed between the upper right surrounding bar 21, the right connecting rod 9, the upper right strut 51a, and the connecting frame 3.

Referring to the drawings, the left support frame 4 also includes left leg rods 43 (rotating shafts L, L') respectively rotatably connected to the lower end of the left strut rod 41, and the left leg rods 43 on both sides can face each other along the vertical direction. Flip over and gather under the left cross bar 42; similarly, the right support frame 5 also includes right leg rods 53 (rotating shafts M, M') respectively rotatably connected to the lower end of the right strut rod 51, and the right leg rods 53 on both sides It can be reversed vertically and folded under the right cross bar 52 . When setting, it can be set as the following structure: the locking structure between the left lower strut 41b and the left upper strut 41a is unlocked during the process of flipping and folding the left leg bar 43 relative to the left cross bar 42, so that the left strut 41 can slide along the length direction Contraction: during the process of flipping and folding the right leg bar 53 relative to the right cross bar 52, the locking structure between the right lower strut 51b and the right upper strut 51a is unlocked so that the right strut 51 can slide and shrink along the length direction.

Referring to the drawings, the lower frame assembly includes a left lower frame 6 and a right lower frame 7 . The left lower surround frame 6 includes two left lower surround rods 61 respectively located on the front and rear sides, and a left lower side rod 62 (rotation axis a3, a3') pivotally connected between the left ends of the left lower surround rods 61 on both sides. The left lower surround rod 61 pivots It is connected to the lower part of the upper left support bar 41a on the same side (rotating shafts B, B'); the lower right surrounding frame 7 includes two right lower surrounding bars 71 respectively located on the front and rear sides, pivotally connected to the right lower surrounding bars on both sides 71 between the right ends of the right lower side bar 72 (rotating shafts a4, a4'), and the right lower surrounding bar 71 is pivotally connected to the lower part of the right upper strut 51a on the same side (rotating shafts D, D'). On the same side of the front and rear sides of the bed frame, the right end of the left lower surrounding bar 61 is rotatably connected with the left end of the right lower surrounding bar 71, so that the left lower surrounding frame 6 and the right lower surrounding frame 7 can be turned over in the left and right directions. The right end of the left lower surrounding bar 61 and the left end of the right lower surrounding bar 71 are pivotally connected through the rotating shafts C and C' respectively, so that the left lower surrounding frame 6 and the right lower surrounding frame 7 are surrounded by a closed frame shape along the circumference. .

In this embodiment, the locking mechanism includes a locking piece 10 arranged between the left lower surrounding bar 61 and the right lower surrounding bar 71 for locking the two. 10 An unlocking handle (not shown in the figure) for synchronous unlocking.

The connecting frame 3 is a U-shaped bar with the opening facing downwards. The right end of the left upper surrounding rod 11 and the left end of the right upper surrounding rod 21 are respectively inserted in the opening of the connecting frame 3 and pivotally connected with the connecting frame 3, so that the connecting frame 3 The opening can limit the relative upward turning of the left upper surrounding rod 11 and the right upper surrounding rod 21 .

Referring to Fig. 1 to Fig. 3, when the bed frame is in the unfolded state, the upper left frame 1 and the upper right frame 2 are respectively located on the left and right sides of the connecting frame 3 and the three are surrounded by a frame shape, and the left support frame 4 is on the left side. The strut 41 is deployed along the length direction, and the lower left leg rod 42 is supported below the left strut 41; The left connecting rod 8 is supported between the left upper surrounding frame 1 and the left support frame 4, the right connecting rod 9 is supported between the right upper surrounding frame 2 and the right supporting frame 5, and the left lower surrounding frame 6 and the right lower surrounding frame 7 are surrounded by It is in the shape of a frame and is locked between the left support frame 4 and the right support frame 5 through the locking piece 10 .

When the bed frame needs to be folded up, as shown in Figure 3, the operator first pulls the unlocking handle to unlock the locking parts 10 on both sides, and drives the end of the left lower surrounding bar 61 connected with the right lower surrounding bar 71 upward Movement, so that the left lower frame 6 and the right lower frame 7 are turned over in the left and right directions and gradually move closer. The surrounding frame 1 turns downwards relative to the connecting frame 3 and gradually draws in with the left supporting frame 4, the right lower surrounding frame 7 turns downwards relative to the connecting frame 3 and gradually draws in with the right supporting frame 5, and finally, the left upper surrounding frame 1 and the left supporting frame 4. The lower left frame 6, the lower right frame 7, the right support frame 5, and the upper right frame 2 are folded along the left and right directions, and are in the state shown in Figure 4, which is a fold of the bed frame. After the one-time folding, the bed frame stands on the ground by relying on the two left outriggers 43 and the two right outriggers 53, which meets the general folding requirements.

Next, referring to FIG. 5 , the left lower leg bars 43 on the front and rear sides are relatively turned over and folded under the left cross bar 42 , and the right lower leg bars 53 on the front and rear sides are relatively turned over and folded under the right cross bar 52 , and then Sliding and shrinking the left upper strut 41a and left lower strut 41b of the left strut 41 along the length direction, and sliding and shrinking the right upper strut 51a and right lower strut 51b of the right strut 51 along the length direction, as shown in Fig. 6 and Fig. 7 state, at this time, on each side of the front and rear sides of the bed frame, the rotation axis of the upper left side bar 11 relative to the left upper side bar 12, the rotation axis of the left strut 41 relative to the left cross bar 42, and the left lower side bar 61 are opposite. The axis of rotation of the lower left side bar 62, the axis of rotation of the lower right side bar 71 relative to the lower right side bar 72, the axis of rotation of the right strut 51 relative to the right cross bar 52, the upper right side bar 21 relative to the upper right side bar The axis of rotation of 22 extends collinearly, that is, the axis lines of the rotating shafts a1, a5, a3, a4, a6, and a2 extend collinearly, that is, the axis line QQ', and the rotating shafts a1', a5', a3', The axis lines of a4', a6' and a2' also extend collinearly, that is, the axis line PP'.

Of course, in other embodiments, before the bed frame is folded once and folded twice, if the upper left side bar 12, the lower left side bar 62, the lower right side bar 72, the upper right side bar 22, the left horizontal bar 42 and the right horizontal bar Rod 52 is folded to the same height position, and the shaft centers of rotating shafts a1, a5, a3, a4, a6, a2 can also be arranged parallel to each other, and the shafts of rotating shafts a1', a5', a3', a4', a6', a2' The heart lines can also be arranged parallel to each other.

Finally, connect the rod groups on the front and rear sides (connector 3, left upper rod 11, left strut 41, left connecting rod 8, left lower rod 61, right lower rod 71, right connecting rod 9, right strut 51) Respectively turn inwardly around the common axis line and with the bar group on the bottom side (left upper side bar 12, left lower side bar 62, right lower side bar 72, right upper side bar 22, left cross bar 42 and right cross bar 52 ) close together, this is the secondary folding of the bed frame. During the specific operation, the rod group on the front side can be turned inward around its common axis line QQ' to make it close to the top of the rod group on the bottom side, and then the rod group on the rear side can be rotated around its common axis The wire PP' is turned inward to stack over the front set of poles. Finally, the bed frame is folded as shown in Figure 8. All the rods are tightly folded together, the structure is very compact and flat, it is very convenient to pack and store, and it takes up very little space, which provides great convenience for users’ daily storage and storage. convenient.

The above-mentioned embodiments are only to illustrate the technical conception and characteristics of the present utility model, and its purpose is to allow those familiar with this technology to understand the content of the utility model and implement it accordingly, and not to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model shall fall within the protection scope of the utility model.

Claims (11)

1. a kind of folding bed, including the bedstead with deployed condition and folded state, for the bedstead to be locked in into expansion shape Locking mechanism under state, it is characterised in that：The bedstead includes upper enclosure frame component, bracket assembly and lower enclosure frame component,

The upper enclosure frame component includes upper left peripheral frame, upper right peripheral frame, is connected between the upper left peripheral frame and upper right peripheral frame and divides Not Wei Yu before and after both sides two links, the upper left peripheral frame includes being located at two upper left railings, pivots of front and rear both sides respectively Axle is connected to the upper left side lever between railing left end in upper left described in two, and the right-hand member of the upper left railing is pivotally connected in and its homonymy The link left end；The upper right peripheral frame includes being located at two upper right railings of front and rear both sides respectively, is pivotally connected in Upper right side lever between upper right railing right-hand member described in two, the left end of the upper right railing is pivotally connected in the company with its homonymy Connect the right-hand member of frame；

Support frame as described above component includes left support frame and right support frame, and the left support frame includes being located at front and rear both sides and edge respectively The left strut of above-below direction extension, the left end of the pivotally connected link for being its homonymy in the upper end of the left strut, institute State left strut and also pivotally connected between the upper left railing of its homonymy have left connecting rod；The right support frame includes position respectively In front and rear both sides and vertically extending right strut, the upper end of the right strut is pivotally connected in the company with its homonymy Connect the right-hand member of frame, the right strut and also pivotally connected between the upper right railing of its homonymy have right connecting rod；

The lower enclosure frame component includes lower-left peripheral frame and bottom right peripheral frame, and the lower-left peripheral frame includes being located at the two of front and rear both sides respectively Root lower-left railing, the lower-left side lever being pivotally connected between railing left end in lower-left described in two, the lower-left railing are pivotally connected in With on the left strut of its homonymy；The bottom right peripheral frame includes being located at two bottom right railings of front and rear both sides, pivot company respectively The bottom right side lever between railing right-hand member in bottom right described in two is connected on, the bottom right railing is pivotally connected in the right support with its homonymy On bar, the right-hand member of the lower-left railing of homonymy rotates with the left end of the bottom right railing to be connected,

When the bedstead is folded, the lower-left peripheral frame with bottom right peripheral frame draw in and drive the left side in left-right direction by relative upset Support frame is drawn in left-right direction with right support frame, at the same the upper left peripheral frame downwardly turn over mutually drawn in the left support frame, The upper right peripheral frame is downwardly turned over and mutually drawn in and after realizing the once folding of the bedstead with the right support frame, front and rear both sides The upper left railing, left strut, lower-left railing, bottom right railing, right strut, upper right railing and link jointly along front and back Draw in above the upper left side lever, lower-left side lever, bottom right side lever and upper right side lever to opposite upset and then realize the bed The twice-folded of frame.

2. folding bed according to claim 1, it is characterised in that：The left strut, the right strut respectively can be along itself Length direction is telescopically set, also pivotally connected between the bottom of the left strut of both sides to have left cross bar, the right side of both sides It is also pivotally connected between the bottom of strut to have a right cross bar, the bedstead by it is described once fold after, the left strut with it is described Right strut shrinks along its length direction and the left cross bar is mutually drawn close with the upper left railing and lower-left railing respectively, institute State after right cross bar mutually draws close with the upper right railing and bottom right railing, the upper left railing of front and rear both sides, left strut, lower-left Railing, bottom right railing, right strut, upper right railing and link jointly overturn and realize described two in opposite directions along the longitudinal direction again It is secondary to fold.

3. folding bed according to claim 2, it is characterised in that：The left strut include upper left strut, can be relatively described The lower-left strut of upper left strut sliding extension, the lower-left railing is pivotally connected on the upper left strut；The right strut bag Include upper right strut, can relatively described upper right strut sliding extension bottom right strut, the bottom right railing is pivotally connected in the right side On upper strut.

4. folding bed according to claim 2, it is characterised in that：The left support frame also includes rotationally being connected to respectively The left branch foot lever of the left strut lower end, the right support frame also includes the right side for being rotationally connected to the right strut lower end respectively Branch foot lever, the bedstead through it is described once fold after and before the twice-folded, left branch foot lever described in two in opposite directions upset and Mutually drawn in the left cross bar, right branch foot lever described in two overturns and mutually drawn in the right cross bar in opposite directions.

5. folding bed according to claim 1, it is characterised in that：The right-hand member of the upper left railing is upper with the left strut End is pivotally connected on the link respectively, structure between the upper left railing of the same side, link, left strut, left lever Into a quadric chain；The upper end of the left end of the upper right railing and the right strut is pivotally connected in the link respectively On, constitute another quadric chain between the upper right railing, link, right strut and right pull bar of the same side.

6. folding bed according to claim 1, it is characterised in that：The link is in downward opening U-shaped bar, the left side The right-hand member of upper pole, the left end of the upper right railing be plugged in respectively in the opening of the link and with the link phase pivot Axle is connected.

7. folding bed according to claim 1, it is characterised in that：The locking mechanism include located at the lower-left railing with Being used to be provided between the locking piece for locking both, the locking piece of front and rear both sides between the bottom right railing is used to incite somebody to action both The unblock carry hand of synchronizing unlocking.

8. according to any described folding bed of claim 1 to 7, it is characterised in that：The bedstead through described in once fold when, The end that the lower-left railing is connected with bottom right railing is up and causes the lower-left peripheral frame with bottom right peripheral frame in left-right direction Relative upset is drawn in.

9. according to any described folding bed of claim 2 to 4, it is characterised in that：The bedstead is after the once folding And before through the twice-folded, before and after the bedstead on the same side of side, the relatively described upper left side lever of the upper left railing The rotational axis line of the relatively described left cross bar of rotational axis line, the left strut, the relatively described lower-left side lever of the lower-left railing Rotational axis line, the rotational axis line of the relatively described bottom right side lever of the bottom right railing, the relatively described right horizontal stroke of the right strut The rotational axis line of the relatively described upper right side lever of the rotational axis line of bar, the upper right railing collinearly extends.

10. according to any described folding bed of claim 2 to 4, it is characterised in that：The bedstead is after the once folding And before through the twice-folded, the upper left side lever, lower-left side lever, bottom right side lever, upper right side lever, left cross bar and right cross bar are received Hold together to sustained height, before and after the bedstead on the same side of side, the center of rotation of the relatively described upper left side lever of the upper left railing The rotational axis line of the relatively described left cross bar of line, the left strut, the rotary shaft of the relatively described lower-left side lever of the lower-left railing Heart line, the bottom right railing relative to the rotational axis line of the bottom right side lever, the right strut relative to the right cross bar rotation The rotational axis line of the relatively described upper right side lever of axial line, the upper right railing is parallel to each other or collinearly extended.

11. according to any described folding bed of claim 1 to 7, it is characterised in that：The bedstead is through the twice-folded When, the upper left railing, left strut, lower-left railing, bottom right railing, right strut, upper right railing and the link of side are jointly After inwardly upset is collapsed to above the upper left side lever, lower-left side lever, bottom right side lever and upper right side lever, the upper left of opposite side is enclosed Jointly inwardly upset is laminated again for bar, left strut, lower-left railing, bottom right railing, right strut, upper right railing and link.