An expandable, modular tiered chair back

Abstract

This application provides an expandable and modular tiered chair backrest, relating to the field of tiered chair technology. It includes two U-shaped clips, with several back panels inserted between them, stacked sequentially. A base plate is fixedly connected between the two U-shaped clips, located below the back panels. A top plate, located above the back panels, is also interlaced between the two U-shaped clips. Fasteners are provided between the top plate, back panels, and base plate. This application achieves a modular backrest design through the use of multiple back panels. Compared to traditional one-piece backrest structures, when a part is damaged, the user does not need to replace the entire backrest; only the damaged back panel needs to be replaced, reducing costs. It also reduces resource waste caused by discarding the entire backrest due to partial damage, as undamaged parts can continue to be used, aligning with the concept of sustainable development and promoting the rational use of resources and environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of tiered chair technology, and more specifically, to an expandable and modular tiered chair backrest. Background Technology

[0002] In the field of seat design and manufacturing, especially in the design of tiered chairs, the backrest is an important component of the seat. Its structure and durability directly affect the user experience and the maintenance cost of the product. At present, most of the backrests of tiered chairs on the market adopt an integrated structure design, that is, the entire backrest is manufactured and installed as an inseparable whole.

[0003] When a chair backrest suffers localized damage due to prolonged use, accidental impact, or other reasons, such as surface wear, cracks, or structural deformation, the only option is often to replace the entire backrest. This increases maintenance costs and wastes resources, as most undamaged parts are discarded along with the entire backrest. Therefore, we have proposed an improvement: an expandable, modular tiered chair backrest. Utility Model Content

[0004] This utility model provides an expandable and modular tiered chair back, including two U-shaped clips, several back panels inserted between the two U-shaped clips, the several back panels being stacked sequentially, a base plate fixedly connected between the two U-shaped clips, the base plate being located below the back panels, and a top plate located above the back panels being interlaced between the two U-shaped clips, with fasteners provided between the top plate, the back panels, and the base plate.

[0005] As a preferred technical solution of this application, the fastener includes a screw hole on the base plate, a through hole on the back plate, and a countersunk hole on the top plate, with a long bolt provided between the countersunk hole, the screw hole, and the through hole.

[0006] As a preferred technical solution of this application, the long bolt is threadedly connected to the screw hole, and the long bolt is interlocked with the countersunk hole and the through hole.

[0007] As a preferred technical solution of this application, the bottom of the top plate and several back plates are provided with slots, and the top of several back plates are provided with blocks, which are inserted into the slots above them.

[0008] As a preferred technical solution of this application, the U-shaped card strip is provided with a plurality of mounting holes for mounting the U-shaped card strip.

[0009] As a preferred technical solution of this application, an extension member is provided between the top plate and several back plates.

[0010] As a preferred technical solution of this application, the extension component includes an extension plate located above the top plate. Both the top plate and the back plate are provided with sockets. A connecting rod is fixedly installed at the bottom of the extension plate, and the outer surface of the connecting rod is inserted and connected to the socket.

[0011] As a preferred technical solution of this application, grooves are provided on both sides of the bottom of the expansion plate.

[0012] As a preferred technical solution of this application, a fastener is provided between the top plate and the connecting rod.

[0013] As a preferred technical solution of this application, the fastener includes a hand-tightening bolt threaded onto the top plate, one end of which is inserted into the socket and abuts against the connecting rod.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] In the scheme of this application:

[0016] This application achieves a modular backrest design by using several back panels. Compared to the traditional one-piece backrest structure, when a part is damaged, the user does not need to replace the entire backrest, but only the damaged back panel needs to be replaced, reducing costs. It also reduces the waste of resources caused by discarding the entire backrest due to partial damage, and the undamaged parts can continue to be used, which is in line with the concept of sustainable development and is conducive to the rational use of resources and environmental protection. Attached Figure Description

[0017] Figure 1 A structural schematic diagram of the expandable and modular tiered chair back provided in this application;

[0018] Figure 2 A rear view structural diagram of the expandable and modular tiered chair back provided in this application;

[0019] Figure 3 This is a schematic diagram of the screw hole provided in this application;

[0020] Figure 4 This is a schematic diagram of the card block provided in this application;

[0021] Figure 5 This is a schematic diagram of the card slot provided in this application.

[0022] The image shows:

[0023] 1. U-shaped retaining strip; 101. Back plate; 102. Base plate; 103. Mounting hole; 104. Top plate; 105. Countersunk hole; 106. Long bolt; 107. Screw hole; 108. Through hole; 109. Locking block; 110. Locking groove; 2. Socket; 201. Connecting rod; 202. Extension plate; 203. Hand-tightening bolt. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0025] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] For an example, please refer to... Figures 1-5 An expandable and modular tiered chair backrest includes two U-shaped clips 1, with several back panels 101 inserted between them. These back panels 101 are stacked sequentially. A base plate 102 is fixedly connected between the two U-shaped clips 1, located below the back panels 101. A top plate 104, located above the back panels 101, is also interlaced between the two U-shaped clips 1. Fasteners are provided between the top plate 104, the back panels 101, and the base plate 102. The modular design of the multiple back panels 101 enables a modular backrest. Compared to traditional one-piece backrest structures, when a part is damaged, the user does not need to replace the entire backrest; only the damaged back panel 101 needs to be replaced, reducing costs. This also reduces resource waste caused by discarding the entire backrest due to partial damage, as undamaged parts can continue to be used, aligning with the concept of sustainable development and promoting the rational use of resources and environmental protection.

[0028] Furthermore, the fasteners include screw holes 107 on the base plate 102, through holes 108 on the back plate 101, and countersunk holes 105 on the top plate 104. Long bolts 106 are provided between the countersunk holes 105, screw holes 107, and through holes 108. The long bolts 106 are threaded to the screw holes 107, and the long bolts 106 are interlocked with the countersunk holes 105 and through holes 108. Through the mutual cooperation of the long bolts 106, screw holes 107, through holes 108, and countersunk holes 105, the top plate 104, the base plate 102, and the back plate 101 can be fixed together, thereby achieving the fixation of the back plate 101.

[0029] Furthermore, the bottom of the top plate 104 and several back plates 101 are provided with slots 110, and the top of several back plates 101 are provided with blocks 109, which are inserted into the slots 110 above them. This arrangement can improve the stability between the several back plates 101.

[0030] Furthermore, the U-shaped clip 1 has several mounting holes 103, which are used for mounting the U-shaped clip 1. By using bolts to pass through the mounting holes 103, the U-shaped clip 1 can be fixed to the step chair to achieve the installation of this application.

[0031] Furthermore, an extension component is provided between the top plate 104 and several back plates 101. The extension component includes an extension plate 202, which is located above the top plate 104. Both the top plate 104 and the back plates 101 have slots 2. A connecting rod 201 is fixedly installed at the bottom of the extension plate 202. The outer surface of the connecting rod 201 is inserted and connected to the slots 2. The height of the extension plate 202 can be adjusted so that the overall height of this application can be adjusted to meet the usage needs of users of different heights.

[0032] Furthermore, grooves are provided on both sides of the bottom of the extension plate 202. The grooves facilitate the insertion of a hand between the extension plate 202 and the top plate 104 to push the extension plate 202 upward.

[0033] Furthermore, a fastener is provided between the top plate 104 and the connecting rod 201; the fastener includes a hand-tightening bolt 203 threaded onto the top plate 104, one end of the hand-tightening bolt 203 is inserted into the socket 2 and abuts against the connecting rod 201, the position of the connecting rod 201 can be fixed by the hand-tightening bolt 203, thereby fixing the position of the extension plate 202.

[0034] The expandable and modular tiered chair back provided by this utility model is used as follows:

[0035] After using bolts to pass through mounting holes 103, fix the U-shaped clips 1 to the step chair. Then, insert several back plates 101 sequentially between two U-shaped clips 1. Finally, insert the top plate 104 between two U-shaped clips 1. After passing the long bolt 106 through the countersunk hole 105 and the through hole 108, connect it to the screw hole 107. Insert the connecting rod 201 into the socket 2 and then unscrew the hand-tightening bolt 203. When disassembling, loosen the hand-tightening bolt 203 and pull the extension plate 202 upward to separate the connecting rod 201 from the socket 2. Rotate the long bolt 106 to separate the long bolt 106 from the screw hole 107. Then, pull the long bolt 106 upward to separate the screw hole 107 from the through hole 108 and the countersunk hole 105. At this time, pull the top plate 104 and the back plate 101 upward to remove the top plate 104 and the back plate 101 from between the two U-shaped clips 1.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. An extendable, spliced, step chair back, characterized by, It includes two U-shaped clips (1), and several back plates (101) are inserted between the two U-shaped clips (1). The several back plates (101) are stacked in sequence. A base plate (102) is fixedly connected between the two U-shaped clips (1). The base plate (102) is located below the back plate (101). A top plate (104) located above the back plate (101) is also inserted between the two U-shaped clips (1). A fixing member is provided between the top plate (104), the back plate (101), and the base plate (102).

2. The expandable, spliced ladder chair back of claim 1, wherein, The fasteners include a screw hole (107) on the base plate (102), a through hole (108) on the back plate (101) and a countersunk hole (105) on the top plate (104), and a long bolt (106) is provided between the countersunk hole (105), the screw hole (107) and the through hole (108).

3. The expandable, spliced ladder chair back of claim 2, wherein, The long bolt (106) is threaded to the screw hole (107), and the long bolt (106) is interlocked with the countersunk hole (105) and the through hole (108).

4. The expandable, spliced ladder chair back of claim 1, wherein, The bottom of the top plate (104) and several back plates (101) are provided with slots (110), and the top of several back plates (101) are provided with blocks (109), and the blocks (109) are inserted into the slots (110) above them.

5. The expandable, spliced ladder chair back of claim 1, wherein, The U-shaped clip (1) has several mounting holes (103) for mounting the U-shaped clip (1).

6. The expandable, spliced ladder chair back of claim 1, wherein, An extension piece is provided between the top plate (104) and several back plates (101).

7. The expandable, spliced ladder chair back of claim 6, wherein, The extension component includes an extension plate (202), which is located above the top plate (104). Both the top plate (104) and the back plate (101) are provided with sockets (2). A connecting rod (201) is fixedly installed at the bottom of the extension plate (202), and the outer surface of the connecting rod (201) is inserted and connected to the socket (2).

8. The expandable, spliced ladder chair back of claim 7, wherein, The expansion plate (202) has grooves on both sides of its bottom.

9. The expandable, spliced ladder chair back of claim 8, wherein, Fasteners are provided between the top plate (104) and the connecting rod (201).

10. The expandable, spliced ladder chair back of claim 9, wherein, The fasteners include a hand-tightening bolt (203) threaded onto the top plate (104), one end of which is inserted into the socket (2) and abuts against the connecting rod (201).

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