Chair back for seat and seat

Abstract

The utility model discloses a chair back for a chair and the chair, and belongs to the technical field of chairs, the chair back comprises a supporting plate, a plurality of connecting plates arranged on the supporting plate and elastic supporting pieces arranged between the connecting plates and the supporting plate, the connecting plate is configured to respond to external acting force to apply pressure to the elastic supporting piece and move relative to the supporting plate when the elastic supporting piece deforms. When the device is applied, the leaning acting force of a user can be transmitted to the elastic supporting piece through the connecting plate, the elastic supporting piece is pressed to deform, and the connecting plate can move relative to the supporting plate in the deformation process of the elastic supporting piece. Therefore, the chair back can adaptively adjust the overall shape of the plurality of connecting plates along with the adjustment of the sitting posture of the user, so that the plurality of connecting plates continuously keep large-area contact with the waist and the back of the user and provide support for the waist and the back of the user. In addition, an electric driving mechanism does not need to be arranged in the scheme, the structure is simple, and cost is low.

Description

Technical Field

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

[0002] Traditional chairs have the backrest fixed to the seat frame. Because the backrest cannot move relative to the seat frame, it only provides effective lumbar support when the user adopts a specific sitting posture. When the user adjusts their posture forward / backward or left / right, part of the lumbar region separates from the backrest, losing support. To address this, some existing chairs incorporate a drive mechanism to move the backrest relative to the seat frame, allowing the backrest to automatically adjust to the user's needs. However, this solution is costly and only allows the entire backrest to move or swing relative to the seat frame. When the user's posture is not adjusted forward / backward, the overall forward / backward movement of the backrest does not improve lumbar support. Utility Model Content

[0003] The purpose of this invention is to provide a chair back and seat that can adaptively deform to fit the user's sitting posture when leaned against, and at a low cost.

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

[0005] A seat back for a chair, the seat back including a support plate, a plurality of connecting plates disposed on the support plate, and an elastic support member disposed between the connecting plates and the support plate, the connecting plates being configured to apply pressure to the elastic support member in response to an external force and to move relative to the support plate when the elastic support member deforms.

[0006] Preferably, one end of the elastic support is fixed to the connecting plate, and the other end of the elastic support is fixed to the support plate.

[0007] Preferably, the chair back also includes a first pad fixed to one end of the elastic support member and a second pad fixed to the other end of the elastic support member. The first pad is detachably mounted on the connecting plate, and the second pad is detachably mounted on the support plate.

[0008] Preferably, the elastic support is a compression spring, and the two ends of the compression spring are welded and fixed to the first pad and the second pad respectively. The first pad and the second pad are respectively locked and fixed to the connecting plate and the support plate by screws.

[0009] Preferably, the multiple connecting plates are arranged along the height direction of the support plate; and / or, the multiple connecting plates are arranged along the width direction of the support plate.

[0010] Preferably, a first clearance gap is provided between two adjacent connecting plates, and a second clearance gap is provided between the connecting plate and the support plate.

[0011] Preferably, the chair back also includes a cover plate, the number of which is the same as the number of the connecting plates and the two are fixedly connected in a one-to-one correspondence, and the cover plate is located on the other side of the connecting plate relative to the support plate.

[0012] Preferably, the support plate includes a backrest and a lumbar support, the lumbar support being rotatably disposed at the lower end of the backrest and having a first position and a second position relative to the backrest, the lumbar support being located in the first position being forward relative to its position in the second position; the chair back also includes an elastic reset member disposed between the backrest and the lumbar support, the elastic reset member applying pressure to the lumbar support with a tendency to remain in the first position.

[0013] Preferably, the lower end of the backrest has a transition structure, and both ends of the transition structure along the width direction of the backrest have transition flanges and limiting protrusions. The lumbar support has a transition groove that matches the transition flange and a limiting groove that matches the limiting protrusion. The transition flange extends into the transition groove and the two are rotatably engaged. The limiting protrusion extends into the limiting groove and the two are engaged to limit the rotational travel of the lumbar support relative to the backrest. The elastic reset member is a torsion spring, one end of the torsion spring is positioned on the transition structure, and the other end of the torsion spring is positioned on the backrest.

[0014] In addition, to achieve the above objectives, the present invention also adopts the following technical solution:

[0015] A seat, including a seat frame, the seat further including a backrest as described in any one of the above technical solutions, the backrest being disposed on the seat frame.

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

[0017] When a user leans back in the chair, the user applies force to the connecting plates through this leaning motion. Under this force, the connecting plates press against the elastic support members, causing the elastic support members to deform. During this deformation, the connecting plates move relative to the support plates. Thus, the multiple connecting plates can adaptively adjust their overall shape according to the user's posture, ensuring that the connecting plates maintain a large contact area with the user's back and provide support. Furthermore, the solution in this application does not require an electric drive mechanism, resulting in a simple structure and low cost. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the structure of a chair back for a seat provided in Embodiment 1 of this application;

[0019] Figure 2 Explosion of the chair back provided in Example 1 Figure 1 ;

[0020] Figure 3 Explosion of the chair back provided in Example 1 Figure 2 ;

[0021] Figure 4 for Figure 3 Another perspective on the exploded view;

[0022] Figure 5 This is an exploded view of the backrest and lumbar support plate in Embodiment 1;

[0023] Figure 6 for Figure 5 Another perspective from the exploded view;

[0024] Figure 7 An exploded view of the support plate, connecting plate, and elastic support member in the chair back provided in Embodiment 2.

[0025] The components include: 1. Support plate; 10. Backrest plate; 100. First adapter half-shell; 1000. Adapter flange; 101. Second adapter half-shell; 1010. Limiting protrusion; 1011. Arc groove; 103. Mounting block; 11. Waist support plate; 110. Adapter groove; 111. Limiting groove; 12. Second positioning groove; 2. Connecting plate; 20. First clearance gap; 21. Second clearance gap; 22. External connecting pipe; 23. First positioning groove; 3. Elastic support component; 4. First pad; 5. Second pad; 6. Cover plate; 60. Internal connecting pipe; 7. Elastic reset component; 8. Connecting rope; 9. End cap. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] 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.

[0029] Example 1: This example provides a chair back for a seat, such as... Figure 1 , Figure 2 and Figure 3 As shown, the chair back includes a support plate 1, a connecting plate 2, and an elastic support member 3. Multiple connecting plates 2 are provided, all mounted on the support plate 1. The elastic support member 3 is positioned between the connecting plates 2 and the support plate 1. In this embodiment, the connecting plates 2 are configured to apply pressure to the elastic support member 3 in response to external forces and to move relative to the support plate 1 when the elastic support member 3 deforms. Thus, when a user leans against the chair back, the user applies force to the connecting plates 2 through this leaning motion. Under this force, the connecting plates 2 press against the elastic support member 3, causing it to deform. During this deformation, the connecting plates 2 move relative to the support plate 1, allowing the overall shape of the multiple connecting plates 2 to adaptively adjust with the user's posture. This ensures that the multiple connecting plates 2 maintain a large contact area with the user's back and provides support. Furthermore, this solution eliminates the need for an electric drive mechanism, resulting in a simple structure and low cost.

[0030] It should be noted that the number of sets of elastic support members 3 in this embodiment can be the same as the number of connecting plates 2. Each connecting plate 2 and support plate 1 is provided with a set of elastic support members 3, and the number of elastic support members in each set of elastic support members 3 can be one or more. Specifically, as shown in the figure... Figure 3 As shown in the figure, the connecting plate 2 in this embodiment is provided with six pieces, and the elastic support member 3 is provided with six sets accordingly, with each set of elastic support member 3 having two elastic support members.

[0031] Of course, in other alternative implementations, the number of connecting plates 2 and the number of sets of elastic supports 3 can also be different. For example, six connecting plates can be set, but only three sets of elastic supports can be set, with each pair of connecting plates corresponding to one set of elastic supports.

[0032] In this embodiment, one end of the elastic support 3 is fixedly connected to the connecting plate 2, and the other end of the elastic support 3 is fixedly connected to the support plate 1. Specifically, in conjunction with... Figure 3 and Figure 4 As shown, the chair back also includes a first pad 4 fixedly connected to one end of the elastic support member 3 and a second pad 5 fixedly connected to the other end of the elastic support member 3. The first pad 4 is detachably installed on the connecting plate 2, and the second pad 5 is detachably installed on the support plate 1. Further, in this embodiment, the elastic support member 3 is a compression spring, and both ends of the compression spring are welded and fixed to the first pad 4 and the second pad 5 respectively. The first pad 4 and the second pad 5 are respectively locked and fixed to the connecting plate 2 and the support plate 1 by screws.

[0033] The above-mentioned assembly scheme for the elastic support 3 ensures the stability of its connection with the connecting plate 2 and the support plate 1, eliminating concerns that the elastic support 3 will detach from the connecting plate 2 or the support plate 1. Furthermore, the compression spring serving as the elastic support 3 can be pre-welded to the first pad 4 and the second pad 5 as a single unit. During assembly, only screws are needed to install the first pad 4 and the second pad 5 onto the connecting plate 2 and the support plate 1 respectively. The assembly operation is relatively simple and facilitates subsequent maintenance and disassembly.

[0034] In addition, to further enhance the stability of the first pad 4 and the second pad 5, this embodiment also provides a first positioning groove 23 on the connecting plate 2 and a second positioning groove 12 on the support plate 1. The first positioning groove 23 is adapted to the first pad 4, and the second positioning groove 12 is adapted to the second pad 5. When assembling the first pad 4 and the second pad 5, the first pad 4 can be placed in the first positioning groove 23, and the second pad 5 can be placed in the second positioning groove 12. Then, screws are used to tighten and fix the first pad 4 and the second pad 5 to the connecting plate 2 and the support plate 1. In this way, because the first pad 4 and the second pad 5 are respectively restricted by the inner walls of the first positioning groove 23 and the second positioning groove 12, the first pad 4 and the second pad 5 cannot loosen relative to the connecting plate 2 and the support plate 1.

[0035] In this embodiment, six connecting plates 2 are provided, and the six connecting plates 2 are arranged along the height direction of the support plate 1. In other optional embodiments, the number of connecting plates 2 can be changed as needed. In addition, the arrangement direction of the connecting plates 2 can also be changed as needed. For example, the connecting plates 2 can be arranged along the width direction of the support plate 1, or the connecting plates 2 can be arranged along both the height direction and the width direction of the support plate 1. For example, the number of connecting plates 2 can be set to twelve, and the twelve connecting plates 2 are symmetrically arranged in two groups along the width direction of the support plate 1, with six connecting plates 2 in each group. In this way, the six connecting plates 2 in each group are arranged along the height direction of the support plate 1, and at the same time, the two groups of connecting plates 2 are arranged relative to each other along the width direction of the support plate 1.

[0036] Furthermore, such as Figure 2 As shown in the diagram, in this embodiment, a first clearance gap 20 is provided between two adjacent connecting plates 2, and a second clearance gap 21 is provided between the connecting plate 2 and the support plate 1. By providing the first clearance gap 20 and the second clearance gap 21, the connecting plate 2 can have the required space to move, allowing it to move relative to the support plate 1 when subjected to external forces. Alternatively, in an optional configuration, adjacent connecting plates 2 can be made to contact each other, with the edges of the connecting plates 2 deformable under external forces. For example, the connecting plates 2 can be made of plastic with thinned edges to allow for deformation. Alternatively, a rubber sleeve can be fitted around the edges of the connecting plates 2. In this way, when the connecting plate 2 is subjected to external forces, its own edges and the edges of adjacent connecting plates 2 can deform under pressure, allowing the connecting plate 2 to move relative to the support plate 1 to adapt to changes in the user's sitting posture.

[0037] The chair back provided in this embodiment also includes cover plates 6. The number of cover plates 6 is the same as the number of connecting plates 2, and the two are fixedly connected in a one-to-one correspondence. The cover plates 6 are located on the other side of the connecting plates 2, opposite to the support plates 1. As mentioned above, for assembling the connecting plates 2 and the support plates 1, the hole structure and connecting screws are exposed on the side of the connecting plates 2 away from the support plates 1. By providing cover plates 6, the exposed hole structure and screws can be covered. At the same time, the surface of the cover plate 6 away from the support plates 1 can be designed as a smooth surface, which is more comfortable for the user. Optionally, the outside of the cover plate 6 can be covered with fabric or leather. Furthermore, sponge or silicone can be filled between the fabric or leather and the cover plate 6.

[0038] In this embodiment, an inner connecting tube 60 is provided on the side of the cover plate 6 facing the connecting plate 2, and an outer connecting tube 22 is provided on the side of the connecting plate 2 away from the cover plate 6. The outer connecting tube 22 has a stepped hole, and the inner connecting tube 60 extends into the outer connecting tube 22 such that the end of the inner connecting tube 60 abuts against the step in the stepped hole. Then, a self-tapping screw is inserted from the port of the outer connecting tube 22 and tightened into the outer connecting tube 22 and the inner connecting tube 60 to lock and fix the cover plate 6 and the connecting plate 2.

[0039] Of course, in optional embodiments, the cover plate 6 may not be provided. Instead, the connecting plate 2 may be directly covered with fabric or leather, and sponge or silicone or other filler may be filled between the fabric or leather and the connecting plate 2.

[0040] Combination Figure 1 , Figure 5 and Figure 6 As shown in the diagram, the support plate 1 in this embodiment includes a backrest 10 and a lumbar support plate 11. It is easily understood that the backrest 10 is used to conform to the user's back and provide support for the user's back, while the lumbar support plate 11 is used to conform to the user's waist and provide support for the user's waist. In this embodiment, the lumbar support plate 11 is rotatably disposed at the lower end of the backrest 10 and has a first position and a second position relative to the backrest 10. The lumbar support plate 11 is forward when in the first position compared to when it is in the second position. The chair back also includes an elastic reset member 7 disposed between the backrest 10 and the lumbar support plate 11. The elastic reset member 7 applies pressure to the lumbar support plate 11 to maintain its position in the first position.

[0041] With the above structural design, the lumbar support plate 11 is in the first position when no user is leaning against it. When the user leans against the chair back, if the user is leaning further back, the lumbar support plate 11 can be pushed to swing relative to the backrest plate 10 towards the second position. Thus, not only can the connecting plate 2 in the chair back move relative to the support plate 1 as the user leans against it to better support the user's back, but the lumbar support plate 11 in the chair back can also swing relative to the backrest plate 10 as the user leans against it to better support the user's waist.

[0042] In other alternative embodiments, the support plate 1 may also be a single plate structure.

[0043] In this embodiment, a transition structure is formed at the lower end of the backrest plate 10. Both ends of the transition structure along the width direction of the backrest plate 10 have transition flanges 1000 and limiting protrusions 1010. The lumbar support plate 11 has a transition groove 110 adapted to the transition flange 1000 and a limiting groove 111 adapted to the limiting protrusion 1010. The transition flange 1000 extends into the transition groove 110 and the two are rotatably engaged. The limiting protrusion 1010 extends into the limiting groove 111 and the two are engaged to limit the rotational travel of the lumbar support plate 11 relative to the backrest plate 10. The elastic reset member 7 is a torsion spring. One end of the torsion spring is positioned on the transition structure, and the other end of the torsion spring is positioned on the lumbar support plate 11. In this way, when the lumbar support plate 11 swings relative to the backrest plate 10 under the action of external force, the torsion spring can be compressed and deformed to store energy. When the user reduces the pressure on the lumbar support plate 11, the lumbar support plate 11 will swing to the first position under the action of the torsion spring.

[0044] To facilitate the assembly of the torsion spring, the adapter structure described in this embodiment includes a first adapter half-shell 100 formed at the lower end of the backrest plate 10 and a second adapter half-shell 101 detachably mounted on the first adapter half-shell 100. The aforementioned adapter flange 1000 is formed on the first adapter half-shell 100, the aforementioned limiting protrusion 1010 is formed on the second adapter half-shell 101, and a groove structure for placing the torsion spring is formed on the first adapter half-shell 100. During assembly, the torsion spring is first placed into the first adapter half-shell 100, then the adapter groove 110 of the waist support plate 11 is aligned with the adapter flange 1000, and then the waist support plate 11 is rotatably connected to the adapter flange 1000 using a locking stud. This allows the waist support plate 11 to swing relative to the backrest plate 10 around the axis of the locking stud. Finally, align the limiting protrusion 1010 on the second adapter half-shell 101 with the limiting groove 111 and insert it, then use screws to lock and fix the second adapter half-shell 101 to the first adapter half-shell 100. Additionally, an arc-shaped groove 1011 is provided on the second adapter half-shell 101, and the torsion arm on the torsion spring, positioned on the waist support plate 11, passes through the arc-shaped groove 1011 and is inserted into the waist support plate 11. The torsion arm positioned on the waist support plate 11 slides in conjunction with the arc-shaped groove 1011, and can slide relative to the arc-shaped groove 1011 during the energy storage process of the torsion arm's deformation.

[0045] The chair back provided in this embodiment can be applied to a seat, which includes a seat frame and a chair back disposed on the seat frame. Specifically, the chair back provided in this embodiment has a mounting block 103 on the backrest panel 10, and the chair back can be fixedly connected to the connecting bracket on the seat frame through the mounting block 103. Of course, the chair back and the seat frame can also be slidably connected so that the chair back can be adjusted relative to the seat frame in the front-back direction or height direction of the seat. The solution of adjusting the chair back relative to the seat frame in the front-back direction or height direction of the seat is prior art and will not be described in detail here.

[0046] Example 2: This example also provides a chair back for a seat, such as... Figure 7 As shown, the difference between this embodiment and the first embodiment above is that the assembly method of the elastic support 3 with the connecting plate 2 and the support plate 1 is different in this embodiment.

[0047] Specifically, in combination Figure 3 , Figure 4 and Figure 7 As shown in the diagram, the elastic support 3 in this embodiment is also a compression spring. One end of the compression spring is placed directly in the first positioning groove 23 and abuts against the connecting plate 2, while the other end is placed directly in the second positioning groove 12 and abuts against the support plate 1. A connecting rope 8 is threaded through the inner ring of the compression spring, with both ends of the connecting rope 8 passing through the connecting plate 2 and the support plate 1, respectively. End caps 9 are provided at both ends of the connecting rope 8. One end cap 9 abuts against the side of the connecting plate 2 away from the support plate 1, and the other end cap 9 abuts against the side of the support plate 1 away from the connecting plate 2. The two end caps 9 work together to compress the compression spring. At the same time, the inner walls of the first positioning groove 23 and the second positioning groove 12 can create a circumferential limiting effect with the end of the compression spring. This cooperation ensures that the connecting plate 2 is mounted on the support plate 1 without falling off, and the connecting plate 2 can also adaptively adjust the overall shape of the multiple connecting plates 2 according to the user's sitting posture.

[0048] In this embodiment, the connecting rope 8 can be a steel wire rope or a plastic rope. The connecting rope 8 should be able to bend and deform adaptively when the compression spring deforms. The end of the connecting rope 8 can be fixed to the end cap 9 by welding, clamping, or other methods according to the material properties.

[0049] 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. A chair back for a seat, characterized in that, The chair back includes a support plate, multiple connecting plates disposed on the support plate, and an elastic support member disposed between the connecting plates and the support plate. The connecting plates are configured to apply pressure to the elastic support member in response to external forces and to move relative to the support plate when the elastic support member deforms.

2. The chair back as described in claim 1, characterized in that, One end of the elastic support is fixed to the connecting plate, and the other end of the elastic support is fixed to the support plate.

3. The chair back as described in claim 2, characterized in that, The chair back also includes a first pad fixed to one end of the elastic support member and a second pad fixed to the other end of the elastic support member. The first pad is detachably mounted on the connecting plate, and the second pad is detachably mounted on the support plate.

4. The chair back as described in claim 3, characterized in that, The elastic support is a compression spring, and the two ends of the compression spring are welded and fixed to the first pad and the second pad respectively. The first pad and the second pad are respectively locked and fixed to the connecting plate and the support plate by screws.

5. The chair back as described in any one of claims 1 to 4, characterized in that, Multiple connecting plates are arranged along the height direction of the support plate; And / or, multiple connecting plates are arranged along the width direction of the support plate.

6. The chair back as described in claim 5, characterized in that, A first clearance gap is provided between two adjacent connecting plates, and a second clearance gap is provided between the connecting plate and the support plate.

7. The chair back as described in any one of claims 1 to 4, characterized in that, The chair back also includes a cover plate, the number of which is the same as the number of the connecting plates and the two are fixedly connected in a one-to-one correspondence, and the cover plate is located on the other side of the connecting plate relative to the support plate.

8. The chair back as described in any one of claims 1 to 4, characterized in that, The support plate includes a backrest and a lumbar support. The lumbar support is rotatably disposed at the lower end of the backrest and has a first position and a second position relative to the backrest. The lumbar support is located in the first position and is forward relative to its position in the second position. The chair back also includes an elastic reset member disposed between the backrest and the lumbar support, the elastic reset member applying pressure to the lumbar support to maintain it in the first position.

9. The chair back as described in claim 8, characterized in that, The lower end of the backrest has a transition structure. Both ends of the transition structure along the width direction of the backrest have transition flanges and limiting protrusions. The lumbar support has a transition groove that matches the transition flange and a limiting groove that matches the limiting protrusion. The transition flange extends into the transition groove and the two are rotatably engaged. The limiting protrusion extends into the limiting groove and the two are engaged to limit the rotational travel of the lumbar support relative to the backrest. The elastic reset element is a torsion spring, with one end of the torsion spring torsion arm positioned on the adapter structure and the other end of the torsion spring torsion arm positioned on the backrest plate.

10. A seat, including a seat frame, characterized in that, The seat further includes a backrest as described in any one of claims 1 to 9, the backrest being disposed on the seat frame.

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