A child's simple to install folding flat pack bed

Abstract

The utility model relates to furniture manufacturing technical field especially a simple installation folding and assembling bed of children, including the bedside assembly of workshop preassembling, the bed end assembly, the bed board assembly and the side rail assembly. Bedside assembly, bed end assembly and bed board assembly all are linked with the side rail assembly through the hinged mode. When the bed body assembly is flat, bedside assembly locking structure and bed end assembly locking structure are coordinated to lock the bed board assembly, when storage, bedside assembly locking structure and bed end assembly locking structure remove the locking state, and the bed board assembly can be turned up to fit the side rail assembly, and bedside assembly and bed end assembly are all folded inwards to fit the bed board assembly. In this way, on one hand, the unfolding and storage operation of the children's bed can be realized through simple operation, and the volume is greatly reduced after folding, on the other hand, since each component has been preassembled in the workshop, the consumer does not need to identify spare parts, use tools and the like after receiving the goods, which significantly reduces the installation difficulty and operation time.

Description

Technical Field

[0001] This utility model relates to the field of furniture manufacturing technology, and in particular to a children's easy-to-assemble folding bed. Background Technology

[0002] Most children's beds on the market are sold in individual packages, meaning that after receiving the product, consumers need to assemble it themselves by referring to the instruction manual or watching video tutorials, or pay an extra fee to hire a professional to assemble it at home. However, the above installation methods generally have problems with high operation difficulty and long time consumption, specifically: 1) There are many parts, and consumers not only need to accurately identify different specifications of parts such as screws, nuts, and connectors, but also need to use various tools such as wrenches and screwdrivers for assembly. The assembly process is cumbersome and is prone to structural instability due to incorrect or missing parts; 2) Hiring professional installers can ensure installation quality, but it will also increase the user's usage costs or the seller's expenses. Moreover, the appointment installation process is time-consuming and cannot meet the user's need for immediate use.

[0003] In recent years, some manufacturers have developed several children's beds with folding functions. However, their folding structure designs are often unreasonable, making the folding process difficult and resulting in a large folded size that is hard to store effectively. Therefore, it is urgent for technicians to solve these problems. Utility Model Content

[0004] The purpose of this utility model is to provide a children's easy-to-assemble folding bed. Through workshop pre-assembly, rotating hinge and linkage locking structure, it overcomes the problems of complicated installation and difficult folding operation of existing children's beds.

[0005] To solve the above-mentioned technical problems, this utility model relates to a children's easy-to-assemble folding and modular bed, which includes a headboard assembly, a footboard assembly, a bed board assembly, and a side railing assembly that are pre-assembled in the workshop stage.

[0006] The headboard assembly, footboard assembly, and bed board assembly are all connected to the side railing assembly via hinges.

[0007] The headboard assembly is equipped with a headboard locking mechanism, and the footboard assembly is equipped with a footboard locking mechanism.

[0008] When the headboard assembly, footboard assembly, and bed board assembly are all deployed to the working position, the headboard locking structure and the footboard locking structure work together to lock the bed board assembly through mechanical linkage.

[0009] When the headboard and footboard locking mechanisms are released, the bed board assembly flips upward and fits against the side rail assembly, while the headboard and footboard assemblies fold inward and fit against the bed board assembly.

[0010] As a further improvement to the technical solution disclosed in this utility model, the side railing assembly includes a left-side support leg and a right-side support leg. The left-side support leg and the right-side support leg each serve as the hinge base for the headboard assembly and the footboard assembly, respectively.

[0011] As a further improvement to the technical solution disclosed in this utility model, the side fence assembly also includes an upper side fence crossbeam, a lower side fence crossbeam, and vertical supports. The left and right side fence support legs, the upper and lower side fence crossbeams, and the lower side fence crossbeams are assembled into a frame structure. The upper and lower ends of the vertical supports are respectively abutted against and fixed to the upper and lower side fence crossbeams, and there are multiple vertical supports arranged linearly along the length of the upper side fence crossbeams.

[0012] As a further improvement to the technical solution disclosed in this utility model, the headboard assembly includes headboard support legs assembled into a frame structure, an upper headboard crossbeam, and a lower headboard crossbeam. The footboard assembly includes footboard support legs assembled into a frame structure, an upper footboard crossbeam, and a lower footboard crossbeam. The upper headboard crossbeam and the upper footboard crossbeam are hinged to the left and right side support legs respectively using ordinary pull-out hinges, while the lower headboard crossbeam and the lower footboard crossbeam are hinged to the left and right side support legs respectively using angled pull-out hinges.

[0013] As a further improvement to the technical solution disclosed in this utility model, in the headboard assembly, the fixed-angle pull-out hinge includes:

[0014] The hinged male seat has an outwardly protruding hinge part and a fixed connection part; the fixed connection part is fixedly connected to the left-side support leg of the side panel.

[0015] The hinge female seat has a concave hinge part and a mounting connection part; the mounting connection part is fixedly connected to the lower crossbeam of the headboard.

[0016] The hinge shaft passes through both the convex hinge portion and the concave hinge portion, allowing the male hinge seat and the female hinge seat to form a rotating pair.

[0017] The outer contour of the convex hinge matches the inner contour of the concave hinge and they interlock; when the headstock assembly is extended to 90°, the limiting end face of the convex hinge and the stop face of the concave hinge are fully in contact.

[0018] As a further improvement to the technical solution disclosed in this utility model, the relative height of the crossbeams at the head of the bed and / or at the foot of the bed is adjustable.

[0019] As a further improvement to the technical solution disclosed in this utility model, the side left support leg, side right support leg, headboard support leg, and footboard support leg are designed with adjustable height.

[0020] As a further improvement to the technical solution disclosed in this utility model, the left-side support leg, the right-side support leg, the headboard support leg, and the footboard support leg have the same design structure. The left-side support leg includes a left-side support leg body, a left-side ground contact leg, and a left-side height adjustment pin. After the left-side support leg body and the left-side ground contact leg are installed, the left-side height adjustment pin locks the assembly relationship between the two.

[0021] As a further improvement to the technical solution disclosed in this utility model, the bed board assembly is connected to the lower side beam by means of hinges. There are multiple hinges, arranged linearly along the length of the lower side beam.

[0022] As a further improvement to the technical solution disclosed in this utility model, the side railing assembly also includes stops. Multiple stops are arranged linearly along the length of the lower crossbeam of the side railing and are fixed. When the bed board assembly is laid flat, the multiple stops remain in a critical contact state with the bed board assembly.

[0023] As a further improvement to the technical solution disclosed in this utility model, the headboard locking structure includes a headboard pin that can slide laterally. The headboard assembly has a headboard transverse through hole that matches the headboard pin. The left side of the bed board assembly has a headboard locking hole that slides with the headboard pin. The footboard locking structure includes a footboard pin that can slide laterally. The footboard assembly has a footboard transverse through hole that slides with the footboard pin. The right side of the bed board assembly has a footboard locking hole that matches the footboard pin. When the headboard assembly, footboard assembly, and bed board assembly are all extended to the working position, the headboard pin and footboard pin respectively penetrate into their corresponding headboard locking holes and footboard locking holes, thus locking the bed board assembly.

[0024] In practical applications, the easy-to-assemble folding bed for children disclosed in this utility model can achieve at least the following beneficial technical effects, specifically:

[0025] 1) Whether for adults or teenagers with basic hands-on skills, the operation can be completed in simple steps, allowing the children's bed to be easily switched between daily use and storage needs. To unfold the bed, simply unfold the headboard and footboard components outwards to 90°, and flip the bed board component downwards to a horizontal position. The headboard and footboard locking mechanisms then quickly and accurately lock the bed board component, requiring no complicated adjustments. When folding away, simply release the headboard and footboard locking mechanisms. The bed board component flips upwards to fit against the side rail components, and the headboard and footboard components fold inwards to fit against the bed board component, significantly reducing the bed's size after folding.

[0026] 2) The headboard assembly, footboard assembly, bed board assembly, and side railing assembly are pre-assembled in the workshop. After receiving the goods, consumers do not need to perform complicated operations such as parts identification and tool use, which greatly reduces the difficulty of installation and saves installation time. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a three-dimensional schematic diagram (in the unfolded state) of the easy-to-assemble folding bed for children disclosed in this utility model.

[0029] Figure 2 This is a three-dimensional schematic diagram (in the folded state) of the easy-to-assemble folding bed for children disclosed in this utility model.

[0030] Figure 3 This is a three-dimensional schematic diagram of the headboard component of the children's easy-to-assemble folding bed disclosed in this utility model.

[0031] Figure 4 yes Figure 2 A magnified view of part of I.

[0032] Figure 5 This is a three-dimensional schematic diagram of the footboard component of the easy-to-assemble folding bed for children disclosed in this utility model.

[0033] Figure 6 This is a three-dimensional schematic diagram of the bed board assembly in the children's easy-to-assemble folding bed disclosed in this utility model.

[0034] Figure 7 This is a three-dimensional schematic diagram of the side railing component in the easy-to-assemble folding bed for children disclosed in this utility model.

[0035] Figure 8 yes Figure 1 A magnified view of part II.

[0036] 1-Headboard assembly; 11-Headboard support leg; 111-Headboard transverse through hole; 12-Headboard upper crossbeam; 13-Headboard lower crossbeam; 2-Legboard assembly; 21-Legboard foot support leg; 211-Legboard transverse through hole; 22-Legboard upper crossbeam; 23-Legboard lower crossbeam; 3-Bedboard assembly; 31-Headboard locking hole; 32-Legboard locking hole; 4-Side railing assembly; 41-Side railing left support leg; 411-Side railing left support leg body; 412-Side railing left ground contact leg; 413-Side railing left height adjustment pin; 42 - Side right support leg; 43- Side upper crossbeam; 44- Side lower crossbeam; 45- Vertical brace; 46- Stop block; 5- Headboard locking structure; 51- Headboard pin; 6- Footboard locking structure; 61- Footboard pin; 7- Ordinary pull-out hinge; 8- Fixed angle pull-out hinge; 81- Hinge male seat; 811- Outwardly protruding hinge part; 8111- Limiting end face; 812- Fixed connection part; 82- Hinge female seat; 821- Inwardly concave hinge part; 8211- Stop surface; 822- Mounting connection part; 83- Hinge shaft; 9- Hinge. Detailed Implementation

[0037] In the description of this utility model, it should be understood that the terms "left", "right", "front", "back", "up", "down", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] The present invention will be further described in detail below with reference to specific embodiments. Figure 1 , Figure 2 The diagrams show two different states of the easy-to-assemble folding bed for children disclosed in this utility model. It can be seen that it is mainly assembled from several parts, including a headboard assembly 1, a footboard assembly 2, a bed board assembly 3, and a side rail assembly 4. The headboard assembly 1, footboard assembly 2, bed board assembly 3, and side rail assembly 4 are all assembled as a single unit during the manufacturing stage and packaged and shipped as independent units, eliminating the need for consumers to perform complex operations such as component identification and tool use upon receipt. The headboard assembly 1, footboard assembly 2, and bed board assembly 3 are all connected to the side rail assembly 4 via hinges. The bed board assembly 3 is connected to the side rail assembly 4 via multiple hinges 9 arranged linearly along the length of the bed board assembly 3. When subjected to rotational torque, the headboard assembly 1 and footboard assembly 2 can perform a lateral folding action, while the bed board assembly 3 can perform a vertical flipping action.

[0039] Whether you're an adult or a teenager with basic hands-on skills, you can easily assemble the children's bed in a few simple steps, making it versatile for both daily use and storage. To unfold the bed, simply unfold the headboard assembly 1 and footboard assembly 2 outwards to 90°, and flip the bed board assembly 3 downwards to a horizontal position. The headboard locking mechanism 5 and footboard locking mechanism 6 then quickly and accurately lock the bed board assembly 3 in place, without any complicated adjustments. When you need to fold it away, simply release the locking mechanisms 5 and 6. The bed board assembly 3 will then flip upwards to fit against the side rail assembly 4, while the headboard assembly 1 and footboard assembly 2 will fold inwards to fit against the bed board assembly 3, significantly reducing the bed's size after folding.

[0040] like Figure 7 As shown, the side railing assembly 4 mainly consists of several parts, including the left side railing support leg 41, the right side railing support leg 42, the upper side railing crossbeam 43, the lower side railing crossbeam 44, and vertical supports 45. During the workshop manufacturing stage, the left side railing support leg 41, the right side railing support leg 42, the upper side railing crossbeam 43, and the lower side railing crossbeam 44 are first assembled into a rectangular frame structure, forming the basic skeleton of the side railing and ensuring the deformation resistance of the side railing assembly 4, suitable for the safety protection needs of children's beds. The upper end of the vertical support 45 contacts and is fixed to the upper side railing crossbeam 43, and the lower end contacts and is fixed to the lower side railing crossbeam 44 (e.g., by bolts or clips). Multiple vertical supports 45 are arranged linearly along the length of the children's bed, which helps to enhance the longitudinal strength and stability of the side railing assembly 4.

[0041] Furthermore, by Figure 7 As can also be clearly seen in the diagram, the side railing assembly 4 is also equipped with stops 46. There are multiple stops 46 arranged linearly along the length of the side railing assembly 4 and fixed in place; when the bed board assembly 3 is laid flat, the multiple stops 46 remain in a critical contact state with the bed board assembly 3. In this way, the load originally concentrated on the hinge 9 is distributed to the support points of multiple stops 46, effectively reducing the stress on a single hinge 9, reducing the risk of wear, deformation, or breakage due to long-term load, extending the service life of the hinge, and avoiding bed board wobbling or connection failure caused by excessive load on the hinge 9, thus facilitating a reasonable load distribution in the load-bearing structure.

[0042] As Figure 3 , Figure 4As shown, the headboard assembly 1 includes headboard support legs 11 assembled into a frame structure, an upper headboard crossbeam 12, and a lower headboard crossbeam 13. The upper headboard crossbeam 12 is hinged to the left side support leg 41 via a standard pull-out hinge 7, while the lower headboard crossbeam 13 is hinged to the left side support leg 41 via a fixed-angle pull-out hinge 8. In this way, on the one hand, while ensuring that the headboard assembly 1 can be adjusted to a certain angle, the limiting design prevents excessive rotation or tipping, enhancing the overall stability of the children's bed structure; and combined with the pre-assembled frame structure of the headboard assembly 1 and the coordinated support of the side rail assembly 4, the stress is effectively distributed. On the other hand, both the standard pull-out hinge 7 and the fixed-angle pull-out hinge 8 have a removable spindle, facilitating the disassembly and separation of the headboard assembly 1 and the side rail assembly 4, reducing later maintenance costs and difficulties.

[0043] like Figure 3 , Figure 4 As shown, the fixed-angle pull-out hinge 8 is composed of a male hinge seat 81, a female hinge seat 82, and a hinge pin 83. The male hinge seat 81 and the female hinge seat 82 are hinged by the hinge pin 83 to form a rotating pair. The male hinge seat 81 has a protruding hinge portion 811 and a fixed connection portion 812. The fixed connection portion 812 is fixedly connected to the left-side support leg 41 of the side frame. The female hinge seat 82 has a concave hinge portion 821 and a mounting connection portion 822. The mounting connection portion 822 is fixedly connected to the lower crossbeam 13 of the headboard. The outer contour of the protruding hinge portion 811 matches the inner contour of the concave hinge portion 821, they interlock, and are simultaneously penetrated by the hinge pin 83. When the headboard assembly 1 is extended to 90°, the limiting end face 8111 of the outwardly protruding hinge part 811 and the stop face 8211 of the inwardly concave hinge part 821 are completely in contact and locked together, so as to achieve precise angle limitation and have the advantages of stable structure and convenient disassembly and assembly.

[0044] like Figure 5 As shown, the footboard assembly 2 includes footboard support legs 21 assembled into a frame structure, an upper footboard crossbeam 22, and a lower footboard crossbeam 23. The upper footboard crossbeam 22 is hinged to the right-side support leg 42 via a standard pull-out hinge 7, and the lower footboard crossbeam 13 is also hinged to the right-side support leg 42 via a fixed-angle pull-out hinge 8. Figure 1 , Figure 2 As shown in the diagram, the folding and unfolding methods of the headboard assembly 1 and the footboard assembly 2 are the same, and will not be repeated here to avoid redundancy.

[0045] like Figure 1 As shown, the main body of the headboard locking structure 5 is a laterally sliding headboard pin 51. The headboard support leg 11 has a lateral through hole 111 that matches the headboard pin 51. The left side of the bed board assembly 3 has a headboard locking hole 31 that engages with the sliding headboard pin 51 (e.g., ...). Figure 6 (As shown in the figure). The main body of the bed foot locking structure 6 is a horizontally sliding bed foot pin 61. The bed foot support leg 21 has a bed foot horizontal through hole 211 that slides with the bed foot pin 61. The right side of the bed board assembly 3 has a bed foot locking hole (not shown in the figure) that matches the bed foot pin 61. When the headboard assembly 1 and the bed foot assembly 2 are unfolded to the working position, the headboard pin 51 and the bed foot pin 61 pass through the headboard horizontal through hole 111 and the bed foot horizontal through hole 211, respectively, and are inserted into the headboard locking hole 31 and the bed foot locking hole on the left and right sides of the bed board assembly 3 to form a mechanical limiting structure. This effectively prevents the bed board assembly 3 from shifting or shaking due to load or external force during use, ensuring the stability and safety of the overall structure of the children's bed. At the same time, the pin design is easy to operate manually, and the locking and unlocking operations can be completed quickly, taking into account both ease of use and structural reliability.

[0046] Folding and modular beds provide infants and toddlers with independent sleeping spaces and are convenient for parents to care for them. However, in the current market, the headboard component 1 and footboard component 2 are designed with fixed heights and cannot be adjusted, making it inconvenient to put in / take out infants and toddlers, which is detrimental to practical use and interaction. Therefore, as a further optimization of the above technical solution, such as... Figure 3 , Figure 5 As shown, the relative height of the headboard crossbeam 12 and / or the footboard crossbeam 22 is adjustable. It is known, based on common design knowledge, that various design structures can be adopted to achieve the adjustment of the relative height of the headboard crossbeam 12 and / or the footboard crossbeam 22, such as positioning hole-pin type adjustment, slide rail-slot type adjustment, rotary locking type adjustment, hydraulic / pneumatic rod type adjustment, threaded lifting type adjustment, etc. Furthermore, our company has filed a patent application for one preferred adjustment method, application number CN2024227406944. For space considerations, further details will not be elaborated here.

[0047] Finally, it should be noted that the easy-to-assemble folding bed for children also features an adjustable height to better adapt to the changing needs of children as they grow, improving safety and convenience while enhancing the product's practicality and cost-effectiveness. As a preferred design, such as... Figure 1 , Figure 2 As shown, the side left support leg 41, side right support leg 42, headboard support leg 11 and footboard support leg 21 are designed with adjustable height and adopt the same adjustment design concept.

[0048] To save space, this section will only provide a detailed explanation of the design structure using the left-side support leg 41 as an example. Figure 8As shown, the left-side support leg 41 mainly consists of several parts, including the left-side support leg body 411, the left-side ground contact leg 412, and the left-side height adjustment pin 413. In practical applications, the left-side ground contact leg 412 is placed directly on the ground. Its top wall extends downwards with an insertion hole for the left-side support leg body 411 to be inserted vertically, and its circumferential sidewall has multiple height adjustment holes (not shown in the figure) arranged linearly along the height direction for the left-side height adjustment pin 413 to be inserted laterally. Near its lower end, the left-side support leg body 411 has a limiting hole (not shown in the figure) for the left-side height adjustment pin 413 to pass laterally. After the left-side support leg body 411 and the left-side ground contact leg 412 are inserted, the left-side height adjustment pin 413 simultaneously adjusts the height and limits the hole to lock the designed height of the left-side support leg 41.

[0049] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A simple folding and modular bed for children, characterized in that, This includes headboard components, footboard components, bed board components, and side railing components that are pre-assembled in the workshop stage; The headboard assembly, the footboard assembly, and the bed board assembly are all connected to the side railing assembly by hinges. The headboard assembly is equipped with a headboard locking structure, and the footboard assembly is equipped with a footboard locking structure; When the headboard assembly, the footboard assembly, and the bed board assembly are all deployed to the working position, the headboard locking structure and the footboard locking structure work together to lock the bed board assembly through mechanical linkage. When the linkage between the headboard locking structure and the footboard locking structure is released, the bed board assembly flips upward and fits against the side rail assembly, while the headboard assembly and the footboard assembly fold inward and fit against the bed board assembly.

2. The easy-to-assemble folding bed for children according to claim 1, characterized in that, The side railing assembly includes a left-side support leg and a right-side support leg; the left-side support leg and the right-side support leg respectively serve as the hinge base for the headboard assembly and the footboard assembly.

3. The easy-to-assemble folding bed for children according to claim 2, characterized in that, The side fence assembly also includes an upper side fence crossbeam, a lower side fence crossbeam, and vertical supports; the left side fence support leg, the right side fence support leg, the upper side fence crossbeam, and the lower side fence crossbeam are assembled into a frame structure; and the upper and lower ends of the vertical supports are respectively abutting and fixed to the upper side fence crossbeam and the lower side fence crossbeam, and there are multiple of them, arranged linearly along the length direction of the upper side fence crossbeam.

4. The easy-to-assemble folding bed for children according to claim 2, characterized in that, The headboard assembly includes headboard support legs assembled into a frame structure, an upper headboard crossbeam, and a lower headboard crossbeam; the footboard assembly includes footboard support legs assembled into a frame structure, an upper footboard crossbeam, and a lower footboard crossbeam; the upper headboard crossbeam and the upper footboard crossbeam are hinged to the left and right side support legs respectively by means of ordinary pull-out hinges, while the lower headboard crossbeam and the lower footboard crossbeam are hinged to the left and right side support legs respectively by means of fixed-angle pull-out hinges.

5. The easy-to-assemble folding bed for children according to claim 4, characterized in that, In the headboard assembly, the fixed-angle pull-out hinge includes: The hinged male seat has an outwardly protruding hinge portion and a fixed connection portion; the fixed connection portion is fixedly connected to the left-side support leg of the side enclosure. The hinge female seat has a concave hinge part and a mounting connection part; the mounting connection part is fixedly connected to the lower crossbeam of the headboard. The hinge shaft passes through both the convex hinge portion and the concave hinge portion, thereby forming a rotating pair between the male hinge seat and the female hinge seat. The outer contour of the convex hinge matches the inner contour of the concave hinge and they interlock; when the headboard assembly is extended to 90°, the limiting end face of the convex hinge and the stop face of the concave hinge are fully in contact.

6. The easy-to-assemble folding bed for children according to claim 4, characterized in that, The relative height of the crossbeam at the head of the bed and / or the crossbeam at the foot of the bed is adjustable.

7. The easy-to-assemble folding bed for children according to claim 4, characterized in that, The left-side support leg, the right-side support leg, the headboard support leg, and the footboard support leg are all height-adjustable.

8. The easy-to-assemble folding bed for children according to claim 3, characterized in that, The bed board assembly is connected to the lower side beam by means of hinges; there are multiple hinges, which are arranged in a linear array along the length of the lower side beam.

9. The easy-to-assemble folding bed for children according to claim 8, characterized in that, The side railing assembly also includes a number of stops; the number of stops is multiple, arranged linearly along the length of the lower crossbeam of the side railing and fixed; when the bed board assembly is laid flat, the multiple stops remain in a critical contact state with the bed board assembly.

10. The easy-to-assemble folding bed for children according to any one of claims 1-9, characterized in that, The headboard locking structure includes a headboard pin that can slide laterally; the headboard assembly has a headboard transverse through hole that matches the headboard pin; the left side of the bed board assembly has a headboard locking hole that slides with the headboard pin; the footboard locking structure includes a footboard pin that can slide laterally; the footboard assembly has a footboard transverse through hole that slides with the footboard pin; the right side of the bed board assembly has a footboard locking hole that matches the footboard pin; when the headboard assembly, the footboard assembly, and the bed board assembly are all extended to the working position, the headboard pin and the footboard pin respectively penetrate into the corresponding headboard locking hole and the footboard locking hole, thereby locking the bed board assembly.

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