Elastic waist rest assembly and seat

Abstract

The utility model provides an elastic waist rest assembly and a seat. The elastic waist rest assembly comprises a waist rest supporting piece, a waist rest plate and a linkage torsional spring, and the waist rest supporting piece is provided with connecting parts which are symmetrical left and right; the waist backup plate is arranged on the front side of the corresponding connecting part, the linkage torsion spring is arranged between the waist backup plate and the connecting part, the linkage torsion spring comprises a fixed arm and a rotating arm capable of rotating front and back, and the fixed arm is connected with the connecting part; the rotating arm is directly or indirectly connected with the waist backup plate; the linkage torsional spring can generate elastic force through a spiral structure of the linkage torsional spring after being stressed, and the breakage phenomenon cannot occur after repeated use; when a user sits, the linkage torsional spring can stably provide reset elastic force, so that the waist backup plate can elastically support the waist, and the maintenance cost of the seat is reduced.

Description

Technical Field

[0001] The utility model relates to the field of seats, in particular to an elastic lumbar support assembly and a seat. Background Art

[0002] The human waist is in a curved shape that bends forward. For this reason, some seats are provided with a lumbar support that can press against the waist at the backrest. The lumbar support is arranged at the lower end of the chair back and protrudes forward to form a support for the natural bending part of the waist, ensuring the lumbar health of office workers.

[0003] The existing lumbar support is usually arranged on the back bracket. The lumbar support is composed of two separate lumbar support plates. The back bracket and the lumbar support plate are connected by an elastic component. The elastic component is made of an elastic rubber block. When the support plate is stressed, the rubber block deforms and provides elastic support for the waist; however, such a design has deficiencies.

[0004] 1. Although the rubber block will deform by its own elasticity when the support plate is stressed, after repeated use, the material strength of the rubber will decrease, resulting in insufficient elastic force generated, affecting the elastic support effect of the support plate on the waist.

[0005] 2. Since the material strength of the rubber will decrease after repeated use and is prone to breakage, it needs to be frequently replaced, which will increase the maintenance cost of the seat. Summary of the Invention

[0006] In order to solve the above technical problems, the purpose of the utility model is to provide an elastic lumbar support assembly. By arranging a linkage torsion spring between the lumbar support member and the lumbar support plate, the linkage torsion spring can generate elastic force through its own spiral structure after being stressed and will not break after repeated use.

[0007] Furthermore, a seat is provided. By arranging the elastic lumbar support assembly on the seat, when the user sits down, the linkage torsion spring can stably provide a reset elastic force, enabling the lumbar support plate to form elastic support for the waist and reducing the maintenance cost of the seat.

[0008] The technical solution of the utility model is realized as follows:

[0009] An elastic lumbar support assembly, comprising:

[0010] A lumbar support member, on which symmetric connecting parts are arranged on the left and right;

[0011] A lumbar support plate, arranged on the front side of the corresponding connecting part. The lumbar support plate includes a bearing surface on its own front side;

[0012] A linkage torsion spring, arranged between the lumbar support plate and the connecting part. The linkage torsion spring includes a fixed arm and a rotatable arm that can rotate forward and backward. The fixed arm is connected to the connecting part; the rotatable arm is directly or indirectly connected to the lumbar support plate;

[0013] The lumbar support plate can elastically rotate in the front - rear direction under the leaning force of the waist and can reset when the leaning force disappears.

[0014] Preferably, the lumbar support plate is located directly in front of the connecting part, and thus an activity interval allowing the lumbar support plate to elastically rotate back and forth is formed between the lumbar support plate and the lumbar support member. The linkage torsion spring includes a spiral part, a fixed arm and a rotating arm are connected to the spiral part, and the spiral part is within the activity interval; the spiral part can provide a rotational support force for the lumbar support plate without setting a rotating shaft between the lumbar support plate and the lumbar support member.

[0015] Preferably, the connecting part and the lumbar support member are integrally formed; the integrally formed design can eliminate the installation process of the connecting part and the lumbar support member and simplify the assembly process.

[0016] Preferably, the connecting part and the lumbar support member are detachably connected; the detachable design can pre - assemble the connecting part, the lumbar support plate and the linkage torsion spring into a module. When assembly is required, the module is directly installed on the lumbar support member, improving the assembly efficiency.

[0017] Preferably, a first groove matching the fixed arm is provided at the front end of the connecting part, and the fixed arm is fitted into the first groove; this ensures the connection stability between the fixed arm and the connecting part and restricts the separation of the fixed arm from the connecting part.

[0018] Preferably, a first gland for closing the opening of the first groove is further connected to the front end of the connecting part; this restricts the fixed arm from disengaging from the connecting part along the opening of the first groove.

[0019] Preferably, the shape of the fixed arm is U - shaped, and the shape of the first groove matches that of the fixed arm; the U - shaped fixed arm stuck in the first groove can form a hooking and limiting effect between the fixed arm and the connecting part, better preventing the fixed arm from separating from the connecting part along its own length direction.

[0020] Preferably, the rear end of the lumbar support plate is indirectly connected to the rotating arm through a mounting seat; a second groove matching the rotating arm is provided at the front end of the mounting seat, and the rotating arm is fitted into the second groove; this ensures the connection stability between the rotating arm and the mounting seat and restricts the separation of the rotating arm from the mounting seat.

[0021] Preferably, a second gland for closing the opening of the second groove is further connected to the front end of the mounting seat; this restricts the rotating arm from disengaging from the mounting seat along the opening of the second groove.

[0022] Preferably, the shape of the rotating arm is two symmetric L - shaped, and the shape of the second groove matches that of the rotating arm; the L - shaped rotating arm stuck in the second groove can form a hooking and limiting effect between the rotating arm and the mounting seat, better preventing the rotating arm from separating from the mounting seat along its own length direction.

[0023] Preferably, a positioning groove matching the mounting seat is provided behind the lumbar support plate. The mounting seat is inserted into the positioning groove and connected to the lumbar support plate by screws. The positioning groove can play a role in installation positioning, enabling the lumbar support plate to be quickly connected to the mounting seat by screws.

[0024] Preferably, a protective sheath is provided on the outer cover of the linkage torsion spring; to prevent the linkage torsion spring from being exposed and affecting the appearance of the seat.

[0025] Preferably, a first gland is further connected to the front end of the connecting portion; the rear end of the lumbar support plate is connected to the rotating arm through a mounting seat; a second gland is further connected to the front end of the mounting seat; the front end of the protective sheath is clamped between the first gland and the connecting portion, and the rear end of the protective sheath is clamped between the second gland and the mounting seat; the clamping connection method does not require an opening on the protective sheath, and while covering the linkage torsion spring with the protective sheath, the structure of the protective sheath is not damaged.

[0026] Preferably, the protective sheath includes a protective sheath body and support feet connected to the front and rear ends of the protective sheath body. The support feet at the front end of the protective sheath body are clamped between the first gland and the connecting portion, and the support feet at the rear end of the protective sheath body are clamped between the second gland and the mounting seat.

[0027] Furthermore, a seat is provided, including the elastic lumbar support assembly described above.

[0028] The beneficial effects of the present invention adopting the above technical solutions are as follows:

[0029] 1. When the lumbar support plate is subjected to a leaning force, compared with the disordered elastic deformation of the rubber block, the spiral structure of the linkage torsion spring can better disperse stress. Therefore, the linkage torsion spring has better durability and a longer service life, thereby effectively reducing the maintenance cost of the seat.

[0030] 2. The spiral portion of the linkage torsion spring is within the active range, providing rotational support between the lumbar support plate and the connecting portion, so that a rotational support shaft does not need to be provided between the lumbar support plate and the connecting portion, further reducing the cost of the seat and simplifying the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the elastic lumbar support assembly installed on the back bracket;

[0032] Figure 2 It is an exploded view of the elastic lumbar support assembly;

[0033] Figure 3 It is a schematic diagram of the first gland connected to the connecting portion;

[0034] Figure 4 It is a schematic diagram of the second gland connected to the mounting seat;

[0035] Figure 5 It is a schematic diagram of the protective sheath removed from the elastic lumbar support assembly;

[0036] Figure 6 It is a schematic diagram of the positioning groove on the lumbar support plate;

[0037] Each reference numeral is: 1 - lumbar support member, 2 - linkage torsion spring, 3 - mounting seat, 4 - sheath, 5 - back support, 6 - lumbar support plate, 1a - connecting portion, 11 - first groove, 12 - first gland, 13 - active range, 21 - fixed arm, 22 - rotating arm, 31 - second groove, 32 - second gland, 61 - positioning groove, 62 - supporting surface, 41 - support leg. Detailed implementation manners

[0038] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0039] Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0040] The detailed implementation manners of the present invention are as follows:

[0041] As Figure 1-6 shown, the present invention provides an elastic lumbar support assembly, including:

[0042] A lumbar support member 1, on which there are symmetrically arranged connecting portions 1a on the left and right;

[0043] A lumbar support plate 6, arranged on the front side of the corresponding connecting portion 1a, and the lumbar support plate 6 includes a supporting surface 62 located directly in front of itself;

[0044] A linkage torsion spring 2, arranged between the lumbar support plate 6 and the connecting portion 1a. The linkage torsion spring 2 is made of metal and includes a fixed arm 21 and a rotatable rotating arm 22. The fixed arm 21 is connected to the connecting portion 1a; the rotating arm 22 is directly or indirectly connected to the lumbar support plate 6;

[0045] The lumbar support plate 6 can elastically rotate in the front - rear direction under the leaning force of the waist, so that the supporting surface 62 fits the waist of the sitter, and can reset when the leaning force disappears.

[0046] Furthermore, while the linkage torsion spring 2 provides rotational and reset elastic forces for the lumbar support plate 6, it is also a rotational support member between the lumbar support plate 6 and the connecting portion 1a. Specifically, the lumbar support plate 6 is located directly in front of the connecting portion 1a, and thus an activity interval 13 allowing the lumbar support plate 6 to elastically rotate back and forth is formed between the lumbar support plate 6 and the lumbar support member 1. The linkage torsion spring 2 includes a helical portion, a fixed arm 21 and a rotating arm 22 connected to the helical portion, and the helical portion is within the activity interval 13; the helical portion can provide rotational support force for the lumbar support plate 6, and there is no need to provide a rotating shaft between the lumbar support plate 6 and the lumbar support member 1, reducing the manufacturing cost.

[0047] Furthermore, the connection manner between the connecting portion 1a and the lumbar support member 1 is diverse, and each has different beneficial effects. For example, the connecting portion 1a and the lumbar support member 1 are integrally formed; the integrally formed design can eliminate the installation process between the connecting portion 1a and the lumbar support member 1, simplifying the assembly process; or, the connecting portion 1a and the lumbar support member 1 are detachably connected; the detachable design enables the connecting portion 1a, the lumbar support plate 6, and the linkage torsion spring 2 to be pre-assembled into a module. When assembly is required, the module is directly installed on the lumbar support member 1, improving the assembly efficiency.

[0048] Furthermore, to prevent the fixed arm 21 from disengaging from the connecting portion 1a, a first fitting groove 11 matching the fixed arm 21 is provided at the front end of the connecting portion 1a, and the fixed arm 21 is fitted in the first fitting groove 11; this ensures the connection stability between the fixed arm 21 and the connecting portion 1a and restricts the separation of the fixed arm 21 from the connecting portion 1a; at the same time, a first pressing cover 12 that closes the opening of the first fitting groove 11 is also connected to the front end of the connecting portion 1a; this restricts the fixed arm 21 from disengaging from the connecting portion 1a along the opening of the first fitting groove 11.

[0049] Furthermore, to make the connection between the fixed arm 21 and the connecting portion 1a more stable, the shape of the fixed arm 21 is U-shaped, and the shape of the first fitting groove 11 matches that of the fixed arm 21; the U-shaped fixed arm 21 being stuck in the first fitting groove 11 can cause a hooking and limiting effect between the fixed arm 21 and the connecting portion 1a, better preventing the fixed arm 21 from separating from the connecting portion 1a along its own length direction.

[0050] Furthermore, the lumbar support plate 6 can be directly connected to the rotating arm 22 of the linkage torsion spring 2, or can be indirectly connected through a mounting seat 3; in this embodiment, an example of indirect connection is given. Among them, a second fitting groove 31 matching the rotating arm 22 is provided at the front end of the mounting seat 3, and the rotating arm 22 is fitted in the second fitting groove 31; this ensures the connection stability between the rotating arm 22 and the mounting seat 3 and restricts the separation of the rotating arm 22 from the mounting seat 3; at the same time, a second pressing cover 32 that closes the opening of the second fitting groove 31 is also connected to the front end of the mounting seat 3, and the second pressing cover 32 can restrict the rotating arm 22 from disengaging from the mounting seat 3 along the opening of the second fitting groove 31.

[0051] Furthermore, to make the connection between the rotating arm 22 and the mounting base 3 more stable, the rotating arm 22 is in the shape of two symmetrical L-shapes, and the shape of the second slot 31 matches that of the rotating arm 22. The L-shaped rotating arm 22 being stuck in the second slot 31 can form a hooking and limiting effect between the rotating arm 22 and the mounting base 3, better preventing the rotating arm 22 from separating from the mounting base 3 along its own length direction.

[0052] Furthermore, to facilitate the connection between the mounting base 3 and the lumbar support plate 6, a positioning slot 61 matching the mounting base 3 is provided behind the lumbar support plate 6. The mounting base 3 is inserted into the positioning slot 61 and connected to the lumbar support plate 6 by screws. The positioning slot 61 can play a role in installation positioning, enabling the lumbar support plate 6 to be quickly connected to the mounting base 3 by screws.

[0053] Furthermore, since the spiral part of the linkage torsion spring 2 is exposed in the active area 13, to ensure the appearance of the seat, a protective cover 4 is provided outside the linkage torsion spring 2. The protective cover 4 is made of flexible rubber material, which can prevent the linkage torsion spring 2 from being exposed and affect the appearance of the seat. At the same time, for safety considerations, the protective cover 4 can also cover the linkage torsion spring 2 to avoid contact with the seated person.

[0054] Furthermore, the protective cover 4 is connected to the elastic lumbar support assembly in the following way: the front end of the protective cover 4 is clamped between the first gland 12 and the connecting part 1a, and the rear end of the protective cover 4 is clamped between the second gland 32 and the mounting base 3. The protective cover 4 includes a protective cover body and support feet 41 connected to the front and rear ends of the protective cover body. The support feet 41 at the front end of the protective cover body are clamped between the first gland 12 and the connecting part 1a, and the support feet 41 at the rear end of the protective cover body are clamped between the second gland 32 and the mounting base 3. The clamping connection method does not require an opening in the protective cover 4, and while covering the linkage torsion spring 2 with the protective cover 4, the structure of the protective cover 4 is not damaged.

[0055] Furthermore, a seat is provided, which includes the elastic lumbar support assembly described above, and also includes a backrest bracket 5. The lumbar support member 5 is provided on the backrest bracket 5. When the lumbar support plate 6 receives a backward leaning force, the linkage torsion spring 2 can provide a stable elastic force to make the supporting surface 62 fit the waist.

[0056] The above has schematically described the present invention and its implementation manners. This description is not restrictive, and what is shown in the drawings is only one of the implementation manners of the present invention. The actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the creation of the present invention, design structurally similar ways and embodiments to this technical solution without creative efforts, they should all fall within the protection scope of the present invention.

Claims

1. An elastic lumbar support assembly, characterized in that it comprises: A lumbar support member (1), on which there are symmetrically arranged connecting parts (1a) on the left and right; A lumbar support plate (6), arranged on the front side of the corresponding connecting part (1a), and the lumbar support plate (6) includes a supporting surface (62) on its own front side; A linkage torsion spring (2), arranged between the lumbar support plate (6) and the connecting part (1a), the linkage torsion spring (2) includes a fixed arm (21) and a rotatable arm (22) that can rotate back and forth, and the fixed arm (21) is connected to the connecting part (1a); the rotatable arm (22) is directly or indirectly connected to the lumbar support plate (6); The lumbar support plate (6) can elastically rotate in the front-back direction under the leaning force of the waist and can reset when the leaning force disappears.

2. The elastic lumbar support assembly according to claim 1, wherein: The lumbar support plate (6) is located directly in front of the connecting part (1a), and thus forms an activity interval (13) that allows the lumbar support plate (6) to elastically rotate back and forth with the lumbar support member (1). The linkage torsion spring (2) includes a spiral part, the fixed arm (21) and the rotatable arm (22) are connected to the spiral part, and the spiral part is within the activity interval (13).

3. The elastic lumbar support assembly according to claim 1, wherein: The connecting part (1a) and the lumbar support member (1) are integrally formed.

4. The elastic lumbar support assembly according to claim 1, characterized in that: The connecting part (1a) and the lumbar support member (1) are detachably connected.

5. The elastic lumbar support assembly according to claim 1, characterized in that: The front end of the connecting part (1a) is provided with a first slot (11) that matches the fixed arm (21), and the fixed arm (21) is fitted into the first slot (11).

6. The elastic lumbar support assembly according to claim 5, characterized in that: The front end of the connecting part (1a) is also connected with a first gland (12) that closes the opening of the first slot (11).

7. The elastic lumbar support assembly according to claim 5, characterized in that: The shape of the fixed arm (21) is U-shaped, and the shape of the first slot (11) matches the fixed arm (21).

8. The elastic lumbar support assembly according to claim 1, characterized in that: The rear end of the lumbar support plate (6) is indirectly connected to the rotatable arm (22) through a mounting seat (3); the front end of the mounting seat (3) is provided with a second slot (31) that matches the rotatable arm (22), and the rotatable arm (22) is fitted into the second slot (31).

9. The elastic lumbar support assembly according to claim 8, wherein: The front end of the mounting seat (3) is also connected with a second gland (32) that closes the opening of the second slot (31).

10. The elastic lumbar support assembly according to claim 8, characterized in that: The shape of the rotatable arm (22) is two symmetric L-shaped, and the shape of the second slot (31) matches the rotatable arm (22).

11. The elastic lumbar support assembly according to claim 8, characterized in that: There is a positioning slot (61) behind the lumbar support plate (6) that matches the mounting seat (3), and the mounting seat (3) is inserted into the positioning slot (61) and connected to the lumbar support plate (6) by screws.

12. The elastic lumbar support assembly according to claim 1, wherein: The linkage torsion spring (2) is externally provided with a sheath (4).

13. The elastic lumbar support assembly according to claim 12, characterized in that: The front end of the connecting part (1a) is also connected with a first gland (12); the rear end of the lumbar support plate (6) is connected to the rotatable arm (22) through a mounting seat (3); the front end of the mounting seat (3) is also connected with a second gland (32); the front end of the sheath (4) is clamped between the first gland (12) and the connecting part (1a), and the rear end of the sheath (4) is clamped between the second gland (32) and the mounting seat (3).

14. An elastic lumbar support assembly according to claim 13, characterized in that: The sheath (4) includes a sheath body and feet (41) connected to the front and rear ends of the sheath body. The feet (41) at the front end of the sheath body are clamped between the first gland (12) and the connecting part (1a), and the feet (41) at the rear end of the sheath body are clamped between the second gland (32) and the mounting seat (3).

15. A seat, characterized in that: Including the elastic lumbar support assembly according to claim 1.

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