Backrest of seat and seat

Abstract

The utility model discloses a backrest of a seat and the seat. The backrest of the seat comprises a backrest support and a backrest outer frame located on the front side of the backrest support. The backrest outer frame comprises a top connecting cross beam, a bottom connecting cross beam and two supporting vertical beams, the tops of the two supporting vertical beams are connected to the two ends of the top connecting cross beam respectively, the bottoms of the two supporting vertical beams are connected to the two ends of the bottom connecting cross beam respectively, and the top connecting cross beam and the bottom connecting cross beam are connected with the backrest support; a flexible supporting piece is arranged in a space defined by the top connecting cross beam, the bottom connecting cross beam and the two supporting vertical beams. The supporting vertical beam comprises a plurality of rigid blocks arranged in the extending direction of the supporting vertical beam, and every two adjacent rigid blocks are connected through an elastic connecting part. According to different sitting postures of users and users with different body types, corresponding deformation can be generated to adapt to the back shapes of the users, so that the comfort of the seat is improved.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, specifically to a seat back and seat. Background Technology

[0002] Traditional chair backrests have a rigid structure that cannot adapt to the shape of the user's back and is difficult to provide good support. Existing office chairs and study chairs usually rely on flexible components such as mesh and shaping cotton to support the user's back. Although the flexible support components can adapt to the shape of the user's back, a rigid frame needs to be set around the perimeter of the backrest to provide a connection base for the flexible support components such as mesh and shaping cotton. The rigid frame cannot adapt to changes in the user's sitting posture and cannot fit users of different body types well, resulting in poor chair comfort. Utility Model Content

[0003] The purpose of this utility model is to provide a seat back and seat that can adapt to the user's different sitting postures and body shapes to improve the comfort of the seat.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The backrest of the seat includes a backrest support and a backrest frame located in front of the backrest support;

[0006] The backrest frame includes a top connecting beam, a bottom connecting beam, and two supporting vertical beams. The top of the two supporting vertical beams is connected to both ends of the top connecting beam, and the bottom of the two supporting vertical beams is connected to both ends of the bottom connecting beam. Both the top connecting beam and the bottom connecting beam are connected to the backrest support. Flexible support members are provided in the space enclosed by the top connecting beam, the bottom connecting beam, and the two supporting vertical beams. The supporting vertical beam includes multiple rigid blocks arranged along the extension direction of the supporting vertical beam, and adjacent rigid blocks are connected by elastic connecting parts.

[0007] Preferably, the elastic connection is wrapped with a flexible support block located between two adjacent rigid blocks, with the upper and lower ends of the flexible support block abutting against the two adjacent rigid blocks respectively.

[0008] Preferably, the elastic connecting part is sheet-like, and its thickness and width are both smaller than those of the rigid block.

[0009] Preferably, the rigid block includes a support wall, and reinforcing ribs extending forward are respectively provided on both sides of the support wall. The ends of the support wall and the reinforcing ribs form a support surface. The elastic connection part is connected to the support wall of the rigid block, and the two ends of the flexible support block abut against the two opposite support surfaces of two adjacent rigid blocks.

[0010] Preferably, the flexible support block has forward-protruding support ribs on both sides, and the support ribs are clamped between the reinforcing ribs of two adjacent rigid blocks.

[0011] Preferably, the front side of the support wall is provided with a forward-protruding connecting column, and the side of the flexible support is connected to the connecting column.

[0012] Preferably, the middle part of the bottom connecting beam is pivotally connected to the backrest support via a laterally extending pivot, and the two ends of the top connecting beam are respectively connected to the backrest support via a connecting bracket. One end of the connecting bracket is fixed to the backrest support, and the other end of the connecting bracket is pivotally connected to the top connecting beam via a laterally extending pivot.

[0013] Preferably, a connecting block is detachably fixed to the rear side of the middle part of the bottom connecting crossbeam, and the pivot is the first pair of locking screws that pass through the connecting block and the bottom of the backrest bracket; a connecting seat is provided on the rear side of each end of the top connecting crossbeam, the connecting bracket is long and strip-shaped, one end of which is detachably fixed to the backrest bracket, and the pivot is the second pair of locking screws that pass through the other end of the connecting bracket and the connecting seat.

[0014] Preferably, the connector is provided with a slot, and the other end of the connector bracket is provided with a forward-protruding connector ear. The connector ear is inserted into the slot, and a second pair of locking screws passes through the connector ear and the connector to pivotally connect the connector ear and the connector.

[0015] Seats, including the backrests of the aforementioned seats.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] In this invention, the two supporting vertical beams of the backrest outer frame are arranged with multiple rigid blocks and multiple elastic connecting parts at intervals. The supporting vertical beams have rigid structures at the rigid blocks, and the elastic connecting parts between adjacent rigid blocks form easily deformable structures. When using the chair, the user's back is supported by flexible support members. For different sitting postures and different body types of users, the elastic connecting parts on the supporting vertical beams can make adaptive deformations according to the user's back shape. That is, when the backrest outer frame is subjected to pressure from the user's back, it can produce corresponding deformations to adapt to the user's back shape, thereby improving the comfort of the chair. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is an assembly diagram of the present invention;

[0020] Figure 3 for Figure 2 Enlarged view at point A in the middle;

[0021] Figure 4 for Figure 2 Schematic diagram of the structure of the flexible support block;

[0022] The components are as follows: 10. Backrest support; 11. Connecting block; 20. Backrest outer frame; 21. Top connecting beam; 211. Connecting seat; 22. Bottom connecting beam; 23. Supporting vertical beam; 231. Rigid block; 2311. Supporting wall; 2312. Reinforcing rib; 2313. Connecting column; 2314. Supporting surface; 232. Elastic connection part; 233. Flexible support block; 2331. Supporting rib; 2332. Upper end face; 2333. Lower end face; 30. Connecting bracket; 31. Connecting ear. Detailed Implementation

[0023] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Unless otherwise specified, the materials and equipment used in this embodiment are all commercially available. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0024] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a connection through an intermediary, or a connection within two elements or an interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] like Figure 1 , 2As shown in Figures 3 and 4, this utility model discloses a seat backrest, which includes a backrest support 10 and a backrest outer frame 20. The backrest outer frame 20 is located in front of the backrest support 10 and provides support for the backrest outer frame 20 through the backrest support 10. The backrest outer frame 20 includes a top connecting crossbeam 21, a bottom connecting crossbeam 22, and two supporting vertical beams 23. The top ends of the two supporting vertical beams 23 are respectively connected to the two ends of the top connecting crossbeam 21, and the bottom ends are respectively connected to the two ends of the bottom connecting crossbeam 22. The top connecting crossbeam 21... Both the top and bottom connecting beams 21 and 22 are connected to the backrest support 10, thereby connecting the backrest outer frame 20 to the backrest support 10. The top connecting beam 21, bottom connecting beam 22, and two supporting vertical beams 23 form a closed space. A flexible support member is provided within this closed space. The flexible support member can be a mesh fabric or shaped cotton. The periphery of the flexible support member is connected to the top connecting beam 21, bottom connecting beam 22, and two supporting vertical beams 23, providing support for the user's back. The supporting vertical beam 23 includes multiple rigid blocks 231, which are arranged along the extension direction of the supporting vertical beam 23. Adjacent rigid blocks 231 are spaced a certain distance apart and are connected by an elastic connecting part 232.

[0027] In this invention, the two supporting vertical beams 23 of the backrest outer frame 20 are arranged with multiple rigid blocks 231 and multiple elastic connecting parts 232 at intervals. The supporting vertical beams 23 have a rigid structure at the rigid blocks 231, and the elastic connecting parts 232 between adjacent rigid blocks 231 form a structure that is easy to deform. When using the seat, the user's back is supported by the flexible support. For different sitting postures and different body types of users, the elastic connecting parts 232 on the supporting vertical beams 23 can make adaptive deformation according to the shape of the user's back. That is, when the backrest outer frame 20 is subjected to pressure from the user's back, it can produce corresponding deformation to adapt to the shape of the user's back, thereby improving the comfort of the seat.

[0028] In a preferred embodiment, the elastic connecting portion 232 is externally wrapped with a flexible support block 233. The flexible support block 233 is located between two adjacent rigid blocks 231, and its upper and lower ends abut against the two adjacent rigid blocks 231 respectively. The flexible support block 233 protects the elastic connecting portion 232 by wrapping it. When the elastic connecting portion 232 deforms, the flexible support block 233 is compressed by the two adjacent rigid blocks 231, preventing the elastic connecting portion 232 from breaking due to excessive deformation. The flexible support block 233 can be made of soft plastic such as TPU, providing good support between the two adjacent rigid blocks 231 when the elastic connecting portion 232 deforms. The elastic connecting part 232 is sheet-shaped and has a relatively smaller radial dimension compared to the rigid block 231. Specifically, the thickness and width of the elastic connecting part 232 are smaller than those of the rigid block 231. The elastic connecting part 232 and the rigid block 231 can be integrally molded and are both made of hard plastics such as PA to ensure that the supporting vertical beam 23 can provide a certain supporting force, while ensuring that the elastic connecting part 232 can generate a certain deformation.

[0029] In this invention, the rigid block 231 includes a support wall 2311 forming its main body. Reinforcing ribs 2312 extending forward are respectively provided on both sides of the support wall 2311. The ends of the support wall 2311 and the reinforcing ribs 2312 form support surfaces 2314. An elastic connecting part 232 is connected to the support wall 2311 of the rigid block 231. The upper end surface 2332 and the lower end surface 2333 of the flexible support block 233 respectively abut against the support surface 2314 at the bottom of the upper rigid block 231 and the support surface 2314 at the top of the lower rigid block 231. Forwardly protruding support ribs 2331 are respectively provided on both sides of the flexible support block 233, and the support ribs 2331 are clamped between the reinforcing ribs 2312 of adjacent rigid blocks 231. The rigid block 231 is designed with a C-shaped cross section, which gives it better bending strength. When subjected to pressure from the user's back, the rigid block 231, which has high strength, is prevented from deforming. At the same time, the support ribs 2331 on the flexible support block 233 can increase the contact area between the flexible support block 233 and the rigid block 231, so that the flexible support block 233 can provide a larger damping force between two adjacent rigid blocks 231, thereby better protecting the elastic connection part 232.

[0030] A forward-protruding connecting post 2313 is provided on the front side of the support wall 2311. The periphery of the flexible support mesh or shaping cotton is connected to the connecting post 2313. Thus, the connection position between the support beam 23 and the flexible support avoids the elastic connection part 232, and avoids mutual interference between the elastic connection part 232 and the flexible support.

[0031] The middle part of the bottom connecting beam 22 is pivotally connected to the backrest support 10 via a laterally extending pivot. The two ends of the top connecting beam 21 are respectively connected to the backrest support 10 via a connecting bracket 30. One end of the connecting bracket 30 is fixedly connected to the backrest support 10, and the other end is pivotally connected to the top connecting beam 21 via a laterally extending pivot. The bottom connecting beam 22 and top connecting beam 21 of the backrest outer frame 20 are pivotally connected to the backrest support 10, giving the bottom connecting beam 22 and top connecting beam 21 the freedom to rotate relative to the backrest support 10. This allows the bottom connecting beam 22 and top connecting beam 21 to adapt to slight rotation when the elastic connection part 232 on the support vertical beam 23 deforms, ensuring that the support vertical beam 23 can deform sufficiently when pressed by the user's back. In addition, the top connecting beam 21 and the backrest support 10 are connected by the connecting bracket 30, forming a certain clearance space between the backrest support 10 and the backrest outer frame 20 to avoid interference between the backrest outer frame 20 and the backrest support 10 when deformed.

[0032] A connecting block 11 is detachably fixed to the rear side of the middle of the bottom connecting beam 22. The aforementioned pivot is a pair of locking screws that pass through the connecting block 11 and the bottom of the backrest bracket 10. During assembly, the connecting block 11 is fixed to the rear side of the middle of the bottom connecting beam 22, and the first pair of locking screws are installed from the left and right sides to pivotally connect the connecting block 11 and the backrest bracket 10 together. A connecting seat 211 is provided on the rear side of each end of the top connecting beam 21. The connecting bracket 30 has a long strip structure, and one end of it is detachably fixed to the backrest bracket 10. The pivot is a second pair of locking screws that pass through the connecting bracket 30 and the connecting seat 211. During assembly, one end of the connecting bracket 30 is fixed to the upper part of the backrest bracket 10, so that the connecting bracket 30 extends forward at an angle. The other end of the connecting bracket 30 is connected to the connecting seat 211, and the second pair of locking screws are installed from the left and right sides to pivotally connect the other end of the connecting bracket 30 to the connecting seat 211 together. A slot is provided on the connector 211, and a forward-protruding connector ear 31 is provided on the other end of the connector bracket 30. The connector ear 31 is inserted into the slot of the connector 211, and a second pair of locking screws pass through the connector ear 31 and the connector 211 to pivotally connect the connector ear 31 and the connector 211 together.

[0033] The seat of this utility model includes the backrest of the aforementioned seat. The other structures of the seat are the same as those in the prior art and will not be described in detail here.

[0034] Finally, it should be noted that the above embodiments are only optional embodiments of this utility model and should not be used to limit the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. The backrest of a seat, characterized in that, Includes a backrest support and a backrest frame located at the front of the backrest support; The backrest frame includes a top connecting beam, a bottom connecting beam, and two supporting vertical beams. The top of the two supporting vertical beams is connected to both ends of the top connecting beam, and the bottom of the two supporting vertical beams is connected to both ends of the bottom connecting beam. Both the top connecting beam and the bottom connecting beam are connected to the backrest support. Flexible support members are provided in the space enclosed by the top connecting beam, the bottom connecting beam, and the two supporting vertical beams. The supporting vertical beam includes multiple rigid blocks arranged along the extension direction of the supporting vertical beam, and adjacent rigid blocks are connected by elastic connecting parts.

2. The backrest of the seat as described in claim 1, characterized in that, The elastic connection is wrapped with a flexible support block located between two adjacent rigid blocks. The upper and lower ends of the flexible support block abut against the two adjacent rigid blocks respectively.

3. The backrest of the seat as described in claim 2, characterized in that, The elastic connecting part is sheet-like, and its thickness and width are smaller than those of the rigid block.

4. The backrest of the seat as described in claim 3, characterized in that, The rigid block includes a support wall, with reinforcing ribs extending forward on both sides of the support wall, and the ends of the support wall and the reinforcing ribs forming a support surface; the elastic connection part is connected to the support wall of the rigid block, and the two ends of the flexible support block abut against the two opposite support surfaces of two adjacent rigid blocks.

5. The backrest of the seat as described in claim 4, characterized in that, The flexible support block has forward-protruding support ribs on both sides, and the support ribs are clamped between the reinforcing ribs of two adjacent rigid blocks.

6. The backrest of the seat as described in claim 4, characterized in that, The front side of the support wall is provided with a forward-protruding connecting column, and the side of the flexible support is connected to the connecting column.

7. The backrest of the seat as described in claim 1, characterized in that, The middle part of the bottom connecting beam is pivotally connected to the backrest support via a laterally extending pivot. The two ends of the top connecting beam are respectively connected to the backrest support via a connecting bracket. One end of the connecting bracket is fixed to the backrest support, and the other end of the connecting bracket is pivotally connected to the top connecting beam via a laterally extending pivot.

8. The backrest of the seat as described in claim 7, characterized in that, A connecting block is detachably fixed to the rear side of the middle of the bottom connecting beam, and the pivot is the first pair of locking screws that pass through the connecting block and the bottom of the backrest bracket; a connecting seat is provided on the rear side of each end of the top connecting beam, and the connecting bracket is long and narrow, with one end of it detachably fixed to the backrest bracket, and the pivot is the second pair of locking screws that pass through the other end of the connecting bracket and the connecting seat.

9. The backrest of the seat as described in claim 8, characterized in that, The connector has a slot, and the other end of the connector bracket has a forward-protruding connector ear. The connector ear is inserted into the slot, and a second pair of locking screws passes through the connector ear and the connector to pivotally connect the connector ear and the connector.

10. A seat, characterized in that, Includes the backrest of the seat as described in any one of claims 1-9.

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