A three-form foldable desk and chair structure

Abstract

This invention relates to a three-form foldable desk and chair structure, characterized by its three forms: a storage form, a desk and chair form, and a bed form, all of which can be converted without disassembly. This achieves a space-saving, multi-functional integrated design. The desk and chair form provides students with sufficient learning space and stable support; the bed form ensures rest for key body parts; and the storage form reduces the space occupied by the desk and chair for easy storage and relocation. A five-bar linkage mechanism is constructed using the desktop support, desktop support rod, desktop support plate, seat, and chair legs. This can be further simplified to a three-bar linkage mechanism by the constraints of two lower rods and the desktop support rod, ensuring structural strength in each form. Furthermore, the structure has been improved and optimized based on ergonomic design principles. This invention presents a three-form variable foldable structure, an integrated multi-functional structure that is stable and reliable in operation and possesses significant space-compressibility.

Description

Technical Field

[0001] This invention relates to the field of school desks and chairs technology, and in particular to a three-form foldable school desk and chair structure. Background Technology

[0002] Traditional school desks and chairs mostly adopt a split structure, with a relatively simple design and limited functionality. This has gradually failed to meet the needs of modern students for a richer classroom experience, greater learning comfort, and more spacious study areas. Furthermore, prolonged sitting in a single posture can cause fatigue and eye damage, directly leading to health problems for students. With the advancement of science and technology and the development of human society, folding desks and chairs have gradually come into view, demonstrating remarkable practical and research value. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a three-form foldable desk and chair structure that achieves an integrated design with significant space compression capabilities.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0005] A three-form foldable desk and chair structure is characterized by comprising a desk body and a seat body. The desk body includes a desktop, desk legs, a desktop support rod, a first rod, and a second rod. The desk legs are hinged to the underside of the desktop. The first rod and the second rod are fixedly connected between the two desk legs from top to bottom. One end of the desktop support rod is hinged to the underside of the desktop, and the middle part is movably connected to the first rod. The seat body includes a seat, a backrest, a first leg, a second leg, and a leg support rod. The backrest is hinged to the seat. The first leg is hinged to the underside of the seat away from the backrest. The second leg is fixedly connected to the underside of the seat near the backrest. One end of the leg support rod is hinged to the first leg, and the other end is movably connected to the second rod.

[0006] Furthermore, the desktop support rod has a first groove in the middle and a second groove at the end, the chair leg support rod has a third groove, and a third rod is provided at the hinge of the chair surface and the first chair leg. The first groove can be connected with the first rod, the second groove can be connected with the third rod, and the third groove can be connected with the second rod.

[0007] Furthermore, the seat portion also includes a folding pad, which is disposed on the seat surface and hinged to the end of the seat surface away from the backrest. The second seat leg is an electrically adjustable structure.

[0008] Furthermore, the hinge joint between the chair back and the seat is equipped with an adjustment wrench and a locking wrench to achieve self-locking of the chair back.

[0009] Furthermore, the first chair leg is a curved rod structure with a certain curvature.

[0010] Furthermore, all hinged structures are connected using bearings.

[0011] Compared with existing technologies, the beneficial effects of this invention are: 1. Through its unique structural design, this invention can form three forms: storage form, table and chair form, and bed form. These three forms can be seamlessly converted without disassembly, achieving a space-saving, multi-functional integrated design. The table and chair form provides students with sufficient learning functions and stable support; the bed form ensures that the main parts of the body can rest; and the storage form reduces the space occupied by the table and chair for easy storage and movement. 2. By utilizing a five-bar linkage mechanism consisting of a desktop support, desktop support rod, desktop support plate, seat, and chair legs, which can be further reduced to a three-bar linkage mechanism under the constraints of two lower rods and the desktop support rod, the structural support strength in each form is guaranteed. Its operation is stable and reliable, and it has significant space compression capabilities. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the form and structure of the table and chairs in an embodiment of the present invention. Figure 1 ;

[0013] Figure 2 This is a schematic diagram of the form and structure of the table and chairs in an embodiment of the present invention. Figure 2 ;

[0014] Figure 3 This is a schematic diagram of the bed morphology and structure in an embodiment of the present invention. Figure 1 ;

[0015] Figure 4 This is a schematic diagram of the bed morphology and structure in an embodiment of the present invention. Figure 2 ;

[0016] Figure 5 This is a schematic diagram of the storage structure in an embodiment of the present invention. Figure 1 ;

[0017] Figure 6 This is a schematic diagram of the storage structure in an embodiment of the present invention. Figure 2 .

[0018] Wherein: 1-tabletop, 2-table leg, 3-tabletop support rod, 4-first rod, 5-second rod, 6-chair seat, 7-chair back, 8-first chair leg, 9-second chair leg, 10-chair leg support rod, 11-first groove, 12-second groove, 13-third groove, 14-third rod, 15-folding pad, 16-adjusting wrench, 17-locking wrench. Detailed Implementation

[0019] To enhance understanding of the present invention, we will now describe it in further detail with reference to the accompanying drawings. These embodiments are for illustrative purposes only and do not constitute a limitation on the scope of protection of the present invention.

[0020] Figure 1-6 A specific embodiment of a three-form foldable desk and chair structure is shown, including a desk body and a chair body. The desk body includes a desktop 1, desk legs 2, desktop support rod 3, a first rod 4, and a second rod 5. The desk legs 2 are hinged to the underside of the desktop 1. The first rod 4 and the second rod 5 are fixedly connected between the two desk legs 2 from top to bottom. The desktop support rod 3 has a first groove 11 in the middle and a second groove 12 at the end. One end of the desktop support rod 3 is hinged to the underside of the desktop 1. The seat assembly includes a seat surface 6, a backrest 7, a first leg 8, a second leg 9, a leg support rod 10, and a folding pad 15. The backrest 7 is hinged to the seat surface 6. The first leg 8 is hinged to the lower side of the seat surface 6 away from the backrest 7. The second leg 9 is fixedly connected to the lower side of the seat surface 6 near the backrest 7. One end of the leg support rod 10 is hinged to the first leg 8. The folding pad 15 is disposed on the seat surface 6 and hinged to the end of the seat surface 6 away from the backrest 7. The second leg 9 is electrically adjustable. The leg support rod 10 has a third groove 13. A third rod 14 is provided at the hinge point between the seat surface 6 and the first leg 8. The first groove 11 can engage with the first rod 4, the second groove 12 can engage with the third rod 14, and the third groove 13 can engage with the second rod 5.

[0021] Preferably, all hinge structures are connected using bearings. An adjusting wrench 16 and a locking wrench 17 are provided at the hinge joint between the chair back 7 and the seat 6 to achieve self-locking of the chair back 7. The first chair leg 8 is a curved rod structure with a certain curvature.

[0022] like Figure 1 , 2 The diagram shows the structure when this embodiment is transformed into a table and chair. At this time, the first groove 11 in the middle of the tabletop support rod 3 engages with the first rod 4, forming a stable tabletop structure; the third groove 13 on the chair leg support rod 10 engages with the second rod 5, forming a stable chair structure; the folding pad 15 flips and adheres to the chair surface 6; the chair back 7 is flipped to a vertical position using the adjusting wrench 16 and locked using the locking wrench 17; the height of the second chair leg 9 is adjusted electrically to ensure that the folding pad 15 and the chair surface 6 remain parallel to the ground.

[0023] like Figure 3 , 4The diagram shows the structure when this embodiment is transformed into a bed. At this time, the third groove 13 on the chair leg support rod 10 separates from the second rod 5; the first groove 11 in the middle of the tabletop support rod 3 separates from the first rod 4; after the tabletop support rod 3 rotates around the hinge point, the second groove 12 at its end engages with the third rod 14; the folding pad 15 flips outwards to fit against the tabletop support rod 3; the adjusting lever 16 is pulled to adjust the backrest 7 to a suitable angle and locked with the locking lever 17; the height of the second chair leg 9 is adjusted by electric lifting to ensure that the folding pad 15 and the chair surface 6 remain parallel to the ground. The tabletop 1, folding pad 15, chair surface 6, and backrest 7 sequentially form a continuous surface, suitable for a person to lie down.

[0024] like Figure 5 , 6 The diagram shows the structure when the device is transformed into its storage form. At this time, the folding pad 15 flips inward to fit against the chair surface 6; the second groove 12 at the end of the tabletop support rod 3 separates from the third rod 14; after releasing the locking lever 17, the chair back 7 is folded towards the chair surface 6 and fitted against the folding pad 15; the table legs 2 flip and fit against the underside of the tabletop 1. This completes the transformation into the storage form, effectively compressing space.

[0025] The above specific embodiments are only for illustrating the technical concept and structural features of the present invention, and are intended to enable those skilled in the art to implement them. However, the above content does not limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit and essence of the present invention should fall within the scope of protection of the present invention.

Claims

1. A three-form foldable desk and chair structure, characterized in that: The device includes a table body and a seat. The table body includes a tabletop (1), table legs (2), a tabletop support rod (3), a first rod (4), and a second rod (5). The table legs (2) are hinged to the underside of the tabletop (1). The first rod (4) and the second rod (5) are fixedly connected between the two table legs (2) from top to bottom. One end of the tabletop support rod (3) is hinged to the underside of the tabletop (1), and the middle part is movably connected to the first rod (4). The seat includes... The chair seat (6), backrest (7), first chair leg (8), second chair leg (9), and chair leg support rod (10) are provided. The backrest (7) is hinged to the chair seat (6). The first chair leg (8) is hinged to the lower side of the chair seat (6) away from the backrest (7). The second chair leg (9) is fixedly connected to the lower side of the chair seat (6) near the backrest (7). One end of the chair leg support rod (10) is hinged to the first chair leg (8), and the other end is movably connected to the second rod (5). The desktop support rod (3) has a first groove (11) in the middle and a second groove (12) at the end. The chair leg support rod (10) has a third groove (13). The hinge of the chair surface (6) and the first chair leg (8) has a third rod (14). The first groove (11) can be connected with the first rod (4). The second groove (12) can be connected with the third rod (14). The third groove (13) can be connected with the second rod (5). The seat part also includes a folding pad (15), which is disposed on the seat surface (6) and hinged to the end of the seat surface (6) away from the backrest (7). The second seat leg (9) is an electrically adjustable structure.

2. The three-form foldable desk and chair structure according to claim 1, characterized in that: An adjustment wrench (16) and a locking wrench (17) are provided at the hinge of the backrest (7) and the seat (6) to achieve self-locking of the backrest (7).

3. The three-form foldable desk and chair structure according to claim 2, characterized in that: The first chair leg (8) is a curved rod structure with a certain curvature.

4. The three-form foldable desk and chair structure according to claim 3, characterized in that: All hinged structures use bearing connections.

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