A children's nap bed that is easy to stack and store

Abstract

The present application discloses a children's nap bed that is easy to stack and store, and relates to the technical field of furniture. The children's nap bed that is easy to stack and store includes a rotating bracket and a bed body that is rotatably connected to the rotating bracket at one end. The rotating bracket includes multiple support rods, and the ends of the support rods are provided with pulleys. The bed body is rotatably provided with multiple bed legs at one end away from the rotating bracket. A driving assembly for driving the multiple bed legs to rotate simultaneously is slidably provided in the bed body, and the driving assembly is capable of locking the bed legs when the bed legs and the pulley are aligned away from the end of the support rod. The bed body is rotatably connected to the rotating bracket, so that the bed body can rotate around the rotating bracket, changing from a horizontal placement state to a vertical placement state, which facilitates the stacking and storage of multiple nap beds in kindergartens and reduces the stacking workload of operators.

Description

Technical Field

[0001] The present application relates to the technical field of furniture, and in particular to a children's nap bed that is easy to stack and store. Background Art

[0002] The importance of lunch break to the physical and mental development of young children is mainly reflected in improving attention, enhancing body resistance, and enhancing environmental adaptability. Ensuring children's lunch break time is crucial to their growth.

[0003] In order to ensure the comfort of children during their nap, kindergartens usually place nap beds for children to rest. However, most kindergartens place nap beds directly in the classroom. However, nap beds are only used for 1-2 hours a day. Too many nap beds placed in the classroom will occupy classroom area and reduce the indoor activity space for children.

[0004] In order to solve the problem of excessive space occupied by nap beds in classrooms, there is a type of nap bed that is easy to stack on the market. The bed includes a bed board, bed legs, and an enclosing guardrail arranged around the bed board. The four corners of the guardrail are provided with accommodating slots for the bed legs, so that multiple beds can be stacked up layer by layer to reduce the indoor area occupied by multiple nap beds. However, during the stacking process, the operator is required to lift the entire bed. The more nap beds there are, the higher the beds will be stacked, and it will be more difficult to stack the remaining nap beds. Summary of the Invention

[0005] In order to improve the convenience of stacking nap beds in kindergartens and allow operators to save more effort when stacking and storing nap beds, the present application provides a children's nap bed that is easy to stack and store.

[0006] The present application provides a children's nap bed that is easy to stack and store, and adopts the following technical solutions:

[0007] It includes a rotating bracket and a bed body with one end rotatably connected to the rotating bracket, the rotating bracket includes a plurality of support rods, and the ends of the support rods are provided with pulleys;

[0008] The bed body is rotatably provided with multiple bed legs at one end away from the rotating bracket, and a driving assembly for driving the multiple bed legs to rotate simultaneously is slidably provided in the bed body, and the driving assembly can lock the bed legs when the bed legs and the pulley are flush away from one end of the support rod.

[0009] By adopting the above technical solution, the bed body is rotatably connected to the rotating bracket, so that the bed body can rotate around the rotating bracket, changing from a horizontal placement state to a vertical placement state, reducing the occupied space, facilitating the stacking and storage of multiple nap beds against the wall in the kindergarten, and reducing the stacking workload of the operator; the rotating bracket includes multiple support rods for supporting the bed body, and the pulleys arranged at one end of the bed body in the eyes of the support rods facilitate the movement of the bed body; the bed legs arranged on the side of the bed board away from the rotating support can be rotated and folded back to the bottom of the support frame under the action of the driving assembly, which is convenient for the storage of the bed body.

[0010] Optionally, the bed includes a support frame, and the support frame is provided with a coaxial first sleeve and a second sleeve at one end close to the rotating bracket, and two second sleeves are provided and arranged on both sides of the first sleeve. The rotating bracket includes a connecting shaft passing through the first sleeve and the second sleeve, and the end of the support rod away from the pulley is fixedly connected to the connecting shaft.

[0011] By adopting the above technical solution, the connecting shaft on the rotating bracket is passed through and rotated in the first sleeve and the second sleeve, thereby realizing the rotating connection between the bed and the rotating bracket; the two second sleeves also play a limiting role, reducing the possibility of the connecting shaft detaching from the support frame.

[0012] Optionally, the bed leg includes a gear at one end, and the bed leg can rotate around the gear axis. The driving assembly includes two racks slidably arranged on the support frame, and the moving directions of the two racks are parallel to the connecting shaft, and are meshed with the gears in a one-to-one correspondence. The driving assembly also includes a pushing member for driving the two racks to move toward or away from each other.

[0013] By adopting the above technical solution, the pusher and the rack both slide in the support frame. When the pusher moves in the direction away from the connecting shaft, the two racks move away from each other, and at the same time, the drive gear rotates in the direction close to the pusher, and the bed leg rotates the assembly in the direction close to the pusher close to the rack, thereby reducing the floor space occupied by the bed when it is stored.

[0014] Optionally, the pushing member is a driving block that moves in a direction perpendicular to the connecting axis, and the two racks include a first guide surface close to one end of the driving block and abutting against the driving block. When the driving block moves in a direction away from the connecting axis, it pushes the two racks to move away from each other, and a reset member is provided on the support frame to reset the two racks to move toward each other.

[0015] By adopting the above technical solution, the first guide surface of the rack is against the driving block. When the driving block moves in the direction away from the connecting shaft, it can push the gear away along the first guide surface, driving the two gears to move away from each other; when the driving block moves in the direction close to the connecting shaft, the reset member drives the two racks to move toward each other, and at the same time, the rack drives the gear to rotate in the direction away from the driving block, and the bed legs expand outward in the direction away from the driving block to provide support for the bed board.

[0016] Optionally, the reset member includes a reset spring fixed to an end of the rack away from the driving block, and one end of the reset spring away from the rack is fixedly connected to the support frame.

[0017] By adopting the above technical solution, a reset member is provided on the rack. When the driving block moves toward the bed board, the driving block gradually approaches the first guide surface. The reset member can drive the rack to move toward the driving block until the first guide surface of the rack completely contacts the driving block.

[0018] Optionally, a locking rod is inserted into the driving block, the locking rod is perpendicular to the axis direction of the first sleeve and is threadedly connected to the driving block, and a side wall of the support frame is threadedly connected to the locking rod.

[0019] By adopting this technical solution, the locking rod is threadedly connected to the drive block and can also be threadedly connected to a side wall of the support frame to secure the position of the drive block. When the bed is placed horizontally from a vertical position, the drive block needs to be moved toward the bed board, causing the bed legs to be turned outward away from the bed board to support the bed. At this time, the locking rod is threadedly connected to the locking block to lock the position of the drive block, preventing the rack from moving and ensuring stable support of the bed by the bed legs.

[0020] Optionally, the bed body includes a bed board fixed to a support frame, and a protective plate is rotatably provided on the periphery of the bed board near the edge, there is rotational damping between the protective plate and the bed board, and the side of the protective plate away from the rotating end can be pressed against the bed board.

[0021] By adopting the above technical solution, the protective plate is connected to the bed board in rotation, and there is rotation damping between the protective plate and the bed board; when the bed is in use, the protective plate can be rotated to be perpendicular to the bed board to reduce the possibility of young children falling from the bed for nap; the protective plate can be folded close to the bed board when the bed is stored, and can clamp out the quilt placed on the bed board, and it is also convenient for the storage of the bed.

[0022] Optionally, a plurality of coaxial third sleeves are provided on the protective plate along the length direction of the side edge of the bed board, and a rotating shaft is fixedly provided on the bed board near each side edge, and the rotating shaft is passed through the third sleeve corresponding to the protective plate.

[0023] By adopting the above technical solution, the protective plate is rotationally connected to the bed board through the third sleeve and the rotating shaft passing through the third sleeve.

[0024] Optionally, there are multiple positioning rods sliding vertically on the bed board, and the third sleeve of the rotating shaft is provided with positioning holes for the positioning rods to be inserted into. When the driving block moves toward the direction close to the connecting axis, it can drive all the positioning rods to move and be inserted into the positioning holes.

[0025] By adopting the above technical solution, a positioning hole for the positioning rod to pass through is opened on the third sleeve, and the driving block can drive all the positioning rods to be inserted into the positioning hole, locking the protective plate and thus limiting the rotation of the protective plate, so that the protective plate is not easy to rotate when pushed by external force, thereby improving the protective performance of the protective plate.

[0026] Optionally, a positioning bracket is slidably connected to the bed body, the positioning rod is vertically fixedly connected to the positioning bracket, a support boss is provided at one end of the positioning bracket away from the bed board, a driving boss is provided on the driving block, and the driving boss includes a second guide surface that is abutted against the support boss. When the driving block moves, the second guide surface is used to drive the positioning bracket to slide.

[0027] By adopting the above technical solution, when the driving block moves toward the connecting axis, the driving boss on the driving block lifts the supporting boss on the positioning bracket under the action of the second guide surface, driving the positioning bracket to move upward, thereby causing the positioning rod vertically fixed on the positioning bracket to move upward and be inserted into the third sleeve.

[0028] In summary, this application has at least one of the following beneficial effects:

[0029] 1. Rotate and connect the nap bed to the rotating bracket so that the nap bed can rotate with the connecting shaft on the rotating bracket. Turn the nap bed to change from a horizontal position to a vertical position, making it easier and more labor-saving to store and stack multiple nap beds.

[0030] 2. The bed is folded and located at the bottom of the bed, which reduces the floor space occupied when the bed is stored;

[0031] 3. A protective plate is installed around the edge of the bed board. The protective plate can not only protect the children during use and reduce the possibility of them falling from the bed during nap, but also can be used in conjunction with the bed board to clamp the mattress, quilt, etc. laid on the bed board to reduce the operator's tidying work.

[0032] 4. The arrangement of the driving boss on the driving block and the supporting boss on the positioning bracket enables the driving block to lift the positioning bracket in the process of driving the bed legs to be perpendicular to the bed board, so that the positioning rod is inserted into the third sleeve to fix the rotating shaft and the protective plate, making it difficult for the protective plate to rotate during the use of the bed body, thereby improving the protective performance of the protective plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the overall structure during use of the embodiment of the present application;

[0034] Figure 2 is a bottom-up schematic diagram of the embodiment of the present application during use;

[0035] Figure 3 is a side view schematic diagram of the embodiment of the present application when stored;

[0036] Figure 4 This is an exploded diagram of the embodiment of the present application when in use;

[0037] Figure 5 It is an exploded schematic diagram showing the structure of the positioning bracket and the driving block in the embodiment of the present application.

[0038] Explanation of the accompanying drawings: 1. Rotating bracket; 11. Pulley; 12. Support rod; 13. Connecting shaft; 2. Bed body; 21. Bed board; 211. Rotating shaft; 22. Support frame; 221. First sleeve; 222. Second sleeve; 23. Bed leg; 231. Gear; 24. Rotating shaft; 3. Driving assembly; 31. Rack; 311. First guide surface; 32. Driving block; 321. Driving surface; 322. Locking rod; 3221. Handle; 33. Driving boss; 331. Second guide surface; 4. Resetting member; 5. Protective plate; 51. Third sleeve; 511. Positioning hole; 6. Positioning bracket; 61. Positioning rod; 62. Supporting boss. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-5 This application is described in further detail.

[0040] The embodiment of the present application discloses a children's nap bed that is easy to stack and store, referring to Figure 1A children's nap bed that is easy to stack and store includes a rotating bracket 1 and a bed body 2 that is rotatably connected to the rotating bracket 1 at one end. The bed body 2 includes a bed board 21 and a support frame 22 fixed to the bottom of the bed board 21. A coaxial first sleeve 221 and two second sleeves 222 are fixedly provided on the side of the support frame 22 close to the rotating bracket 1, and the second sleeves 222 are respectively located on both sides of the first sleeve 221; the rotating bracket 1 includes a connecting shaft 13 that passes through the first sleeve 221 and the second sleeve 222 to achieve a rotational connection between the rotating bracket 1 and the bed body 2. The rotating bracket 1 also includes a support rod 12 fixed to the side wall of the connecting shaft 13 near the first sleeve 221. A pulley 11 is installed on the end of the support rod 12 away from the connecting shaft 13. In this embodiment, the pulley 11 is specifically a universal wheel with a braking function.

[0041] After the bed body 2 is used, it can be rotated around the connecting shaft 13 to a vertical position and placed against the wall. Multiple bed bodies 2 can be rotated to a vertical position and stacked together, making the storage of the nap bed easier and more labor-saving. Universal wheels are also provided to facilitate users to move the bed bodies.

[0042] Reference Figure 2 Two bed legs 23 are rotatably mounted on the side of the bottom of the support frame 22 away from the rotating bracket 1. A driving assembly 3 is slidably mounted within the support frame 22 for driving the bed legs 23 to rotate. The driving assembly 3 can simultaneously drive the two bed legs 23 to be lowered or retracted. The driving assembly 3 includes two colinear racks 31 slidably mounted on the side of the support frame 22 away from the rotating bracket 1, and a driving block 32 slidably mounted between the two racks 31. The driving block 32 is used to drive the two racks 31 to move toward or away from each other. A gear 231 is fixed to one end of the bed leg 23 close to the bed board 21. The gear 231 is rotatably connected to the bottom of the support frame 22 via a rotating shaft 24 and meshes with the rack 31. The bed leg 23 can rotate around the axis of the gear 231.

[0043] Reference Figure 2The rack 31 includes a first guide surface 311 near the side of the drive block 32, and the first guide surface 311 gradually moves away from the connecting shaft 13 in the direction of gradually approaching the drive block 32. The drive block 32 includes a drive surface 321 near the side of the rack 31, and the drive surface 321 is parallel to and can fit with the first guide surface 311. When the drive block 32 moves in the direction away from the connecting shaft 13, the drive block 32 can drive the gear 231 to rotate, thereby retracting the bed leg 23. The support frame 22 is provided with a reset member 4 for resetting the rack 31. When the drive block 32 moves toward the connecting shaft 13, the reset member 4 can drive the rack 31 to reset, causing the bed leg 23 to rotate in the direction away from the rack 31. A locking rod 322 is inserted into the drive block 32, and the locking rod 322 is perpendicular to the axis of the first sleeve 221 and is threadedly connected to the drive block 32. The locking rod 322 can penetrate into a side wall of the support frame 22 and be threadedly connected to the side wall of the support frame 22. A handle 3221 is fixed to the end of the locking rod 322 away from the rotating bracket 1, which facilitates the operator to rotate or push and pull the locking rod 322. In other embodiments of the present application, the locking rod 322 can also be rotatably connected to the driving block 32 and cannot move relative to the driving block 32. When the locking rod 322 is rotated so that the locking rod 322 is connected to the side wall of the support frame 22, the locking rod 322 can move together with the driving block 32.

[0044] Reference Figure 2 When the first guide surface 311 and the drive surface 321 completely overlap, the bed leg 23 is perpendicular to the bed board 21, and the bed leg 23 and the support rod 12 together support the bed board 21. In other embodiments, the bed leg 23 can also be rotated to form an acute angle with another bed leg 23, as long as the end of the bed leg is parallel to the bottom of the pulley. Twisting the locking rod 322 and screwing it into the side wall of the support frame 22 fixes the position of the locking rod 322, thereby restricting the position of the locking rod 322 and fixing the position of the bed leg 23; at this time, the position of the drive block 32, which is threadedly connected to the locking rod 322, is locked and prevented from sliding, thereby improving the support stability of the bed leg 23.

[0045] Reference Figure 1 and Figure 3 When the operator turns the locking rod 322, the end of the locking rod 322 away from the handle 3221 is disengaged from the side wall of the support frame 22; after the locking rod 322 is disengaged from the support frame 22, the driving block 32 is unlocked and can slide in the support frame 22. In the process of pulling the driving block 32 out of the support frame 22, the first guide surface 311 gradually slides away from the driving surface 321, and the two racks 31 move away from each other; at the same time, the rack 31 drives the gear 231 to rotate, causing the bed leg 23 to rotate toward the bed board 21 until it is folded on the rack 31, making it easy for the bed body 2 to be stored.

[0046] Reference Figure 2 and Figure 3The reset member 4 is specifically a reset spring, one end of which is connected to the rack 31 and the other end is fixed to the side wall of the support frame 22. During the next use, the bed leg 23 is folded close to the rack 31, and the reset spring is in a compressed state. When the operator pushes the drive block 32 into the support frame 22, the drive surface 321 contacts the first guide surface 311, and the first guide surface 311 moves toward the drive surface 321. The reset spring can drive the two racks 31 to move toward each other, and the rack 31 drives the gear 231 to rotate, causing the bed leg 23 to rotate away from the bed board 21. When the first guide surface 311 and the drive surface 321 completely overlap, the bed leg 23 is perpendicular to the ground again.

[0047] Reference Figure 2 and 4 A protective plate 5 is rotatably mounted near the edge of the bed board 21. Several third sleeves 51 are provided along the length of the side of the bed board 21 for rotational connection with the bed board 21. In this embodiment, two third sleeves 51 are provided, spaced apart on the protective plate 5. A rotating shaft 211, whose axis is parallel to the bed board surface, is fixed near each side of the bed board 21. Each rotating shaft 211 passes through the third sleeve 51 of the corresponding protective plate 5, achieving rotational connection between the protective plate 5 and the bed board 21. There is a certain amount of friction between the inner wall of the third sleeve 51 and the outer wall of the rotating shaft 211, requiring a certain degree of external force to rotate the protective plate 5.

[0048] During the use of the bed 2, the protective plate 5 is rotated so that the protective plate 5 is perpendicular to the bed board 21 to reduce the possibility of the child falling from the bed for nap; when the bed 2 needs to be stored, the protective plate 5 is rotated so that the protective plate 5 is folded on the bed board 21 to clamp the mattress, quilt, etc. placed on the bed board 21, which reduces the operator's tidying work and facilitates the next use of the bed 2.

[0049] Reference Figure 4 and Figure 5In order to improve the stability of the protective plate 5 during use and reduce the risk of the protective plate 5 being pushed or pulled by a child, which would reduce the protective effect, a positioning bracket 6 is slidably provided between the bed board 21 and the drive block 32. A number of positioning rods 61 are fixed to the positioning bracket 6. In this embodiment, eight positioning rods 61 are provided and are evenly arranged on each side of the positioning bracket 6. The third sleeve 51 is provided with corresponding positioning holes 511 for the positioning rods 61 to be inserted one by one. When the positioning rods 61 are inserted into the positioning holes 511, the position of the third sleeve 51 can be locked to limit the rotation of the protective plate 5. A support boss 62 is fixedly provided on the side of the positioning bracket 6 close to the drive block 32, and a drive boss 33 is fixedly provided on the side of the drive block 32 close to the bed board 21. The drive boss 33 includes a second guide surface 331 that abuts against the support boss 62. When the operator pushes the driving block 32 into the support frame 22, the driving boss 33 moves toward the direction close to the supporting boss 62, and the second guide surface 331 lifts the supporting boss 62 to drive the positioning bracket 6 to move upward; during the movement of the positioning bracket 6, it drives each positioning rod 61 to move upward, and the positioning rod 61 passes through the side wall of the third sleeve 51 into the positioning hole 511 to lock the protective plate 5, so that the protective plate 5 is not easy to rotate after being perpendicular to the bed board 21, thereby improving the protective performance of the protective plate 5.

[0050] The implementation principle of the embodiment of the present application is a children's nap bed that is easy to stack and store as follows: rotate each protective plate 5 so that the protective plate 5 is perpendicular to the bed board 21, push the handle 3221 to push the driving block 32 into the support frame 22, and rotate the bed leg 23 in the direction away from the rack 31; when the end of the locking rod 322 away from the handle 3221 begins to be inserted into the threaded hole opened in the side wall of the support frame 22, turn the handle 3221 to thread the locking rod 322 and the threaded hole and rotate it into the side wall of the support frame 22 until the bed leg 23 is perpendicular to the bed board 21; at the same time, the driving boss 33 on the driving block 32 gradually approaches the support boss 62 on the positioning bracket 6 to lift the support boss 62, so that the positioning rod 61 penetrates into the positioning hole 511 to lock the protective plate 5.

[0051] After the bed 2 is used, the handle 3221 is twisted to separate the locking rod 322 from the side wall of the support rod 12 at the end away from the handle 3221; the handle 3221 is pulled to partially pull the drive block 32 out of the support frame 22, driving the bed legs 23 to rotate toward the rack 31; the drive boss 33 also gradually moves away from the support boss 62, causing the positioning rod 61 to gradually disengage from the third sleeve 51; when the bed legs 23 are folded close to the rack 31, the drive boss 33 is completely separated from the support boss 62, and the positioning rod 61 is also disengaged from the rotating shaft 211, at which point the drive block 32 can be stopped. The protective plate 5 is rotated so that the protective plate 5 is folded onto the bed board 21 to clamp the quilt. The part of the drive block 32 outside the support frame 22 is pulled to rotate the bed 2 around the connecting shaft 13 to a vertical state, and the bed 2 is pushed and stacked against the wall.

[0052] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A children's nap bed that is easy to stack and store, characterized by: It comprises a rotating bracket (1) and a bed body (2) one end of which is rotatably connected to the rotating bracket (1), wherein the rotating bracket (1) comprises a plurality of support rods (12), and pulleys (11) are provided at the ends of the support rods (12); A plurality of bed legs (23) are rotatably provided at one end of the bed body (2) away from the rotating bracket (1), and a driving assembly (3) for driving the plurality of bed legs (23) to rotate simultaneously is slidably provided in the bed body (2), and the driving assembly (3) is capable of locking the bed legs (23) when the bed legs (23) and the pulley (11) are aligned away from one end of the support rod (12); The bed (2) includes a support frame (22), and a coaxial first sleeve (221) and a second sleeve (222) are provided at one end of the support frame (22) close to the rotating bracket (1). Two second sleeves (222) are provided and are arranged on both sides of the first sleeve (221). The rotating bracket (1) includes a connecting shaft (13) passing through the first sleeve (221) and the second sleeve (222). The end of the support rod (12) away from the pulley (11) is fixedly connected to the connecting shaft (13). The bed leg (23) includes a gear (231) at one end, and the bed leg (23) can rotate around the axis of the gear (231). The driving assembly (3) includes two racks (31) slidably arranged on the support frame (22). The two racks (31) move in parallel with the connecting shaft (13) and are meshed with the gear (231) in a one-to-one correspondence. The driving assembly (3) also includes a pushing member for driving the two racks (31) to move toward or away from each other. The pushing member is a driving block (32) that moves in a direction perpendicular to the connecting shaft (13). The two racks (31) include a first guide surface (311) close to one end of the driving block (32) and abutting against the driving block (32). When the driving block (32) moves in a direction away from the connecting shaft (13), the two racks (31) are pushed to move away from each other. A reset member (4) is provided on the support frame (22) to reset the two racks (31) to move toward each other.

2. The foldable and storable children's nap bed according to claim 1, characterized in that: The reset member (4) comprises a reset spring fixed to one end of the rack (31) away from the driving block (32), and one end of the reset spring away from the rack (31) is fixedly connected to the support frame (22).

3. The foldable and storable children's nap bed according to claim 2, characterized in that: A locking rod (322) is provided in the driving block (32), the locking rod (322) being perpendicular to the axial direction of the first sleeve (221) and being threadedly connected to the driving block (32), and a side wall of the support frame (22) is threadedly connected to the locking rod (322).

4. The foldable and easily foldable children's nap bed according to claim 1, characterized in that: The bed body (2) comprises a bed board (21) fixed to a support frame (22); a protective plate (5) is rotatably provided on a peripheral side of the bed board (21) near an edge thereof; rotational damping exists between the protective plate (5) and the bed board (21), and a side of the protective plate (5) away from a rotating end can be pressed against the bed board (21).

5. The foldable and storable bed for children's nap according to claim 4, characterized in that: A plurality of coaxial third sleeves (51) are provided on the protective plate (5) along the length direction of the side edge of the bed plate (21); a rotating shaft (211) is fixedly provided near each side edge of the bed plate (21), and the rotating shaft (211) is passed through the third sleeve (51) corresponding to the protective plate (5).

6. The foldable and easily storable children's nap bed according to claim 5, characterized in that: A plurality of positioning rods (61) are vertically slidably provided on the bed plate (21), and positioning holes (511) for the positioning rods (61) to be inserted into are provided on the third sleeve (51), and when the driving block (32) moves toward the direction approaching the connecting shaft (13), it can drive all the positioning rods (61) to move so as to be inserted into the positioning holes (511) in a one-to-one correspondence.

7. The foldable and easily storable children's nap bed according to claim 6, characterized in that: A positioning bracket (6) is slidably connected to the bed body (2), the positioning rod (61) is vertically fixedly connected to the positioning bracket (6), a support boss (62) is provided at one end of the positioning bracket (6) away from the bed board (21), a driving boss (33) is provided on the driving block (32), and the driving boss (33) includes a second guide surface (331) that abuts against the supporting boss (62), and when the driving block (32) moves, the second guide surface (331) is used to drive the positioning bracket (6) to slide.

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