Seat waist rest controlled by double driving mechanisms and seat

Abstract

The utility model relates to a seat waist rest and seat controlled by double driving mechanisms, which comprises a seat backrest framework, a waist rest body and driving mechanisms, and further comprises a control seat, the driving mechanisms comprise an upper driving mechanism and a lower driving mechanism, the upper driving mechanism and the lower driving mechanism respectively comprise a fixing part and a driving part, fixing parts of the upper driving mechanism and the lower driving mechanism are rotationally connected with the control seat, driving parts of the upper driving mechanism and the lower driving mechanism are rotationally connected with the upper portion of the seat backrest framework and the lower portion of the seat backrest framework respectively, the driving parts can stretch out and draw back relative to the fixing parts, and the upper driving mechanism and the lower driving mechanism are each provided with a control element. The waist rest body is fixedly connected with the control base and can be driven by the upper driving mechanism and the lower driving mechanism to be adjusted up and down in a stepless mode along with the control base. According to the seat, stepless adjustment of the elevation angle and the rotation angle of the waist and the back is achieved, convenient and fast multidirectional stepless adjustment of the waist rest can be achieved through a preferable scheme, and the using convenience and comfort of the seat are greatly improved.

Description

Technical Field

[0001] The utility model relates to a seat waist support and a seat controlled by a double driving mechanism, belonging to the technical field of seat components and seats. Background Art

[0002] As furniture closely related to human life, chairs bring convenience to human work and meet the needs of daily desk work. The lumbar support of existing chairs is either fixed and cannot be adjusted, or needs to be manually adjusted to achieve a position suitable for the back posture. However, during the adjustment process of the existing lumbar support, the user's back is away from the lumbar support (the reason is that the components that drive the lumbar support to rotate mostly use torsion springs that cannot support the weight of the back). Therefore, the user can only rely on repeated adjustments and repeated leaning. This method is extremely inconvenient and often cannot be adjusted to the most comfortable position. After adjustment, the lumbar support posture is fixed and will not change with the user's sitting posture, resulting in discomfort for long-term leaning. In addition, the existing lumbar support adjustment often changes the posture by rotating the hinge angle of the lumbar support and the seat cushion. When the adjustment range is large, it seriously affects the user's experience.

[0003] The Chinese utility model patent with authorization announcement date of July 12, 2022 and authorization announcement number CN216932462U discloses a self-adhering back-chasing lumbar support, including a support frame, a lumbar support board, and a support rod. The upper end of the support rod is hinged with an upper hinged accessory, one end of the upper hinged accessory is fixed to the middle part of the support frame, and the lower end of the support rod is hinged with a lower hinged accessory. The lumbar support board is fixed to the lower hinged accessory by bolts, and a drive assembly is hinged on the support frame, and one end of the drive assembly is hinged to the support rod through a hinge column. The utility model drives the pneumatic support rod (or hydraulic telescopic rod or electric telescopic rod) to move through a switch and drives the support rod to rotate around its upper end hinge point. Since the support rod has two parts that will ensure that the lumbar support board moves forward at an unchanged elevation angle under the action of reverse torsion, the lumbar support board can always be close to the user's waist and back, providing stable support for it and helping it to maintain a good sitting posture. The utility model still has the following shortcomings: it can only ensure that the lumbar support plate moves forward at a constant elevation angle under the action of reverse twisting by two supporting rods, so that the lumbar support plate can always be close to the user's waist and back, provide a stable support force and help the user maintain a good sitting posture, but cannot achieve stepless adjustment of the elevation angle of the waist and back body, and cannot achieve stepless adjustment of the circumferential multi-angle of the waist and back to facilitate the user to adjust the sitting posture adaptively. The utility model aims to solve this technical problem by changing the adjustment structure of the lumbar support and changing the assembly connection method to achieve stepless adaptive adjustment of the lumbar support. Utility Model Content

[0004] One of the purposes of the present utility model is to solve the shortcomings of the prior art that the lumbar support of a seat is fixed and cannot be adjusted, or that its angle and up and down position need to be manually adjusted to reach a position suitable for the back posture, or that it can only achieve stepless adjustment of the waist and back up and down, and to provide a seat lumbar support controlled by a dual drive mechanism that can conveniently achieve stepless adjustment of the waist and back reclining angle and rotation angle.

[0005] The second purpose of the present invention is to provide a seat equipped with a lumbar support of the present invention. The seat changes the assembly connection method based on the adjustment structure of the lumbar support to achieve stepless adjustment of the waist and back reclining angle and rotation angle. The preferred solution can achieve convenient multi-directional stepless adjustment of the lumbar support, greatly improving the convenience and comfort of the seat.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A seat lumbar support controlled by a dual drive mechanism comprises a seat back frame, a lumbar support body and a drive mechanism, and is characterized in that it also comprises a control seat, the drive mechanism comprises an upper drive mechanism and a lower drive mechanism, the upper drive mechanism and the lower drive mechanism both comprise a fixing part and a driving part, the fixing parts of the upper drive mechanism and the lower drive mechanism are both rotatably connected to the control seat, the driving parts of the upper drive mechanism and the lower drive mechanism are respectively rotatably connected to the upper part of the seat back frame and the lower part of the seat back frame, the driving part can be extended and retracted relative to the fixing part, the upper drive mechanism and the lower drive mechanism are both provided with a control element, the lumbar support body is fixedly connected to the control seat, and can be steplessly adjusted up and down with the control seat under the drive of the upper drive mechanism and the lower drive mechanism.

[0008] As mentioned above, the existing seat lumbar support is fixed and cannot be adjusted, or needs to be manually adjusted to reach a position suitable for the back posture, or can only achieve stepless adjustment of the waist and back up and down. A seat lumbar support controlled by a dual drive mechanism that can achieve stepless adjustment of the waist and back reclining angle is provided. The technical solution of the utility model, through the structural design and reasonable layout of the upper and lower drive mechanisms, can achieve stepless adjustment of the waist and back body up and down under the action of the upper and lower drive mechanisms, thereby improving the comfort of the user.

[0009] Preferably, an upper rotating seat is fixedly provided on the upper part of the seat back frame, and an adaptive rotating part is provided on the end of the driving member, which is rotatably connected to the upper rotating seat through the cooperation of the rotating part; a lower rotating seat is fixedly provided on the lower part of the seat back frame, and an adaptive rotating part is provided on the end of the driving member, which is rotatably connected to the lower rotating seat through the cooperation of the rotating part.

[0010] Preferably, the control seat is provided with a rotating cavity at the position matched with the fixing member on the upper and lower sides, and the fixing member is provided with a rotating end, which is rotatably connected through the cooperation of the rotating cavity and the rotating end.

[0011] Preferably, the upper drive mechanism and the lower drive mechanism are selected from any one of a pneumatic telescopic drive assembly, a hydraulic telescopic drive assembly and an electric telescopic drive assembly. Pneumatic telescopic drive assembly, hydraulic telescopic drive assembly and electric telescopic drive assembly are all commonly used drive mechanisms with simple structure, convenient maintenance and installation, and convenient manual operation.

[0012] Preferably, the upper driving mechanism and the lower driving mechanism are both selected from pneumatic telescopic driving components, and the control element is a pneumatic telescopic rod control cable.

[0013] Preferably, the upper driving mechanism and the lower driving mechanism are controlled by a pneumatic telescopic rod control cable with one main circuit and two branches, and a control handle for easy pulling is fixed at the movable end of the pneumatic telescopic rod control cable.

[0014] Preferably, the lumbar support body and the control seat are indirectly fixed by a flexible connector made of a multi-directionally deformable flexible material, one end of the flexible connector is fixed to the lumbar support body, and the other end is fixed to the control seat. Under this preferred solution structure, the lumbar support body can be adjusted in 360° circumferential directions in multiple directions.

[0015] Preferably, the flexible connector is a rubber flexible connector or a silicone flexible connector or a spring flexible connector, and / or the flexible connector is provided with penetrating honeycomb structure holes.

[0016] Preferably, the lumbar support body is fixedly provided with a lumbar support fixing piece, and one end of the flexible connecting body is fixedly connected to the lumbar support fixing piece.

[0017] A seat comprises a seat body and a lumbar support structure, adopts the seat lumbar support controlled by the dual drive mechanism described above, a frame fixing piece is fixedly arranged at the lower end of the seat back frame, and the seat back frame is fixedly connected to the seat body through the frame fixing piece.

[0018] The beneficial effects of the utility model are as follows: the technical solution of the utility model, through the structural design and reasonable layout of the upper and lower driving mechanisms, can realize stepless adjustment of the waist and back body up and down under the action of the upper and lower driving mechanisms, thereby improving the comfort of the user. The seat equipped with the utility model multi-directional stepless adjustment seat waist support, the waist support body is in an upward tilted state, and conforms to the principle of ergonomics, and fits well with the back of the user. It is convenient and reliable to adjust the tilt angle, and when it needs to be reset, the user can easily achieve it by squeezing the waist support body with the back. The waist support body can be adaptively rotated to the angle required by the body according to the waist of the human body. In daily use, whether sitting forward or backward, the most comfortable distance can be achieved, and the waist support body is always kept in close contact with the waist and back. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the utility model.

[0024] The markings in the accompanying drawings are described as follows: 1. upper driving mechanism, 2. lower driving mechanism, 3. control element, 4. flexible connector, 5. lumbar support fixing part, 6. control seat, 7. M8 external hexagonal nut, 8. rivet, 91. upper rotating seat, 92. lower rotating seat, 10. first screw, 11. M6 external hexagonal nut, 12. second screw, 13. seat back frame, 14. lumbar support body, 15. third screw. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0026] Example: Figure 1-4 As shown, a seat lumbar support controlled by a dual drive mechanism includes a seat back frame 13, a lumbar support body 14 and a drive mechanism, and also includes a control seat 6. The drive mechanism includes an upper drive mechanism 1 and a lower drive mechanism 2. The upper drive mechanism 1 and the lower drive mechanism 2 both include a fixing member and a driving member. The fixing members of the upper drive mechanism 1 and the lower drive mechanism 2 are both rotatably connected to the control seat 6. The driving members of the upper drive mechanism 1 and the lower drive mechanism 2 are respectively rotatably connected to the upper part of the seat back frame 13 and the lower part of the seat back frame 13. The driving member can be telescopic relative to the fixing member. The upper drive mechanism 1 and the lower drive mechanism 2 are both provided with a control element 3. The lumbar support body 14 is fixedly connected to the control seat 6 and can be steplessly adjusted up and down with the control seat 6 under the drive of the upper drive mechanism 1 and the lower drive mechanism 2.

[0027] As mentioned above, the existing seat lumbar support is fixed and cannot be adjusted, or needs to be manually adjusted to reach a position suitable for the back posture, or can only achieve stepless adjustment of the waist and back up and down. A seat lumbar support controlled by a dual drive mechanism that can achieve stepless adjustment of the waist and back reclining angle is provided. The technical solution of the utility model, through the structural design and reasonable layout of the upper and lower drive mechanisms, can achieve stepless adjustment of the waist and back body up and down under the action of the upper and lower drive mechanisms, thereby improving the comfort of the user.

[0028] In this embodiment, an upper rotating seat 91 is fixedly provided on the upper portion of the seat back frame 13, and an adaptive rotating portion is provided on the end of the driving member, which is connected to the upper rotating seat 91 through the cooperation and rotation of the rotating portion. Specifically, as shown in the exploded view, rivets 8 are used for riveting; a lower rotating seat 92 is fixedly provided on the lower portion of the seat back frame 13, and an adaptive rotating portion is provided on the end of the driving member, which is connected to the lower rotating seat 92 through the cooperation and rotation of the rotating portion. Specifically, as shown in the exploded view, rivets 8 are used for riveting; the upper rotating seat 91 and the lower rotating seat 92 are both screwed and fixed to the seat back frame 13 by a second screw 12.

[0029] Specifically, a rotating cavity is provided at the parts of the upper and lower sides of the control seat 6 that are adapted to the fixing part, and the fixing part is provided with a rotating end, which is rotatably connected through the cooperation of the rotating cavity and the rotating end. As shown in the exploded diagram, the rotating end is provided with a rotating hole, and the rotating connection is achieved by the cooperation of the first screw 10 and the M6 ​​external hexagonal nut 11.

[0030] In this embodiment, the upper drive mechanism 1 and the lower drive mechanism 2 are selected from any one of a pneumatic telescopic drive assembly, a hydraulic telescopic drive assembly and an electric telescopic drive assembly. The pneumatic telescopic drive assembly, the hydraulic telescopic drive assembly and the electric telescopic drive assembly are all commonly used drive mechanisms with simple structures, convenient maintenance and installation, and convenient manual operation.

[0031] Specifically for the selection of this embodiment, the upper driving mechanism 1 and the lower driving mechanism 2 are both selected from pneumatic telescopic driving components, and the control element 3 is a pneumatic telescopic rod control cable.

[0032] In this embodiment, the upper driving mechanism 1 and the lower driving mechanism 2 are controlled by a pneumatic telescopic rod control cable with one main circuit and two branches, and a control handle for easy pulling is fixed at the movable end of the pneumatic telescopic rod control cable.

[0033] In this embodiment, the lumbar support body 14 and the control seat 6 are indirectly fixed by a flexible connector 4 made of a flexible material that can deform in multiple directions, one end of the flexible connector 4 is fixed to the lumbar support body 14, and the other end is fixed to the control seat 6. Under the structure of this preferred solution, the lumbar support body 14 can be adjusted in multiple directions in 360° circumferential direction.

[0034] Specifically, the flexible connector 4 is a rubber flexible connector or a silicone flexible connector or a spring flexible connector, and / or the flexible connector is provided with penetrating honeycomb structure holes.

[0035] In this embodiment, the lumbar support body 14 is fixedly provided with a lumbar support fixing member 5, and one end of the flexible connecting body 4 is fixedly connected to the lumbar support fixing member 5. As shown in the exploded view, both ends of the flexible connecting body 4 are respectively provided with polygonal connecting parts, such as hexagonal, and the lumbar support fixing member 5 is provided with a corresponding hexagonal hole, and the connecting part is inserted into the polygonal hole and locked by an M8 external hexagonal nut 7. Similarly, the flexible connecting member 4 and the control seat 6 also adopt the aforementioned connection method, and the lumbar support fixing member 5 is fixed to the lumbar support body by a third screw 15.

[0036] A seat comprises a seat body and a lumbar support structure, adopts the seat lumbar support controlled by the dual drive mechanism described above, a frame fixing piece is fixedly arranged at the lower end of the seat back frame, and the seat back frame is fixedly connected to the seat body through the frame fixing piece.

[0037] The beneficial effects of the utility model are as follows: the technical solution of the utility model, through the structural design and reasonable layout of the upper and lower driving mechanisms, can realize stepless adjustment of the waist and back body up and down under the action of the upper and lower driving mechanisms, thereby improving the comfort of the user. The seat equipped with the utility model multi-directional stepless adjustment seat waist support, the waist support body is in an upward tilted state, and conforms to the principle of ergonomics, and fits well with the back of the user. It is convenient and reliable to adjust the tilt angle, and when it needs to be reset, the user can easily achieve it by squeezing the waist support body with the back. The waist support body can be adaptively rotated to the angle required by the body according to the waist of the human body. In daily use, whether sitting forward or backward, the most comfortable distance can be achieved, and the waist support body is always kept in close contact with the waist and back.

[0038] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A seat lumbar support controlled by a dual drive mechanism, comprising a seat back frame, a lumbar support body and a drive mechanism, characterized in that: It also includes a control seat, the driving mechanism includes an upper driving mechanism and a lower driving mechanism, the upper driving mechanism and the lower driving mechanism both include a fixing part and a driving part, the fixing parts of the upper driving mechanism and the lower driving mechanism are both rotatably connected to the control seat, the driving parts of the upper driving mechanism and the lower driving mechanism are respectively rotatably connected to the upper part of the seat back frame and the lower part of the seat back frame, the driving part can be extended and retracted relative to the fixing part, the upper driving mechanism and the lower driving mechanism are both provided with a control element, the lumbar support body is fixedly connected to the control seat, and can be driven by the upper driving mechanism and the lower driving mechanism, and can be adjusted up and down steplessly with the control seat.

2. The seat lumbar support controlled by the dual drive mechanism according to claim 1, characterized in that: An upper rotating seat is fixedly provided on the upper part of the seat back frame, and an adaptive rotating part is provided on the end of the driving member, which is connected to the upper rotating seat through the cooperation and rotation of the rotating part; a lower rotating seat is fixedly provided on the lower part of the seat back frame, and an adaptive rotating part is provided on the end of the driving member, which is connected to the lower rotating seat through the cooperation and rotation of the rotating part.

3. The seat lumbar support controlled by the dual drive mechanism according to claim 1, characterized in that: The upper and lower sides of the control seat are provided with rotation cavities at the locations matched with the fixing piece, and the fixing piece is provided with a rotation end, which is rotationally connected through the matching of the rotation cavity and the rotation end.

4. A seat lumbar support controlled by a dual drive mechanism according to claim 1, 2 or 3, characterized in that: The upper driving mechanism and the lower driving mechanism are both selected from any one of a pneumatic telescopic driving assembly, a hydraulic telescopic driving assembly and an electric telescopic driving assembly.

5. A seat lumbar support controlled by a dual drive mechanism according to claim 4, characterized in that: The upper driving mechanism and the lower driving mechanism are both selected from pneumatic telescopic driving components, and the control element is a pneumatic telescopic rod control cable.

6. A seat lumbar support controlled by a dual drive mechanism according to claim 5, characterized in that: The upper driving mechanism and the lower driving mechanism are controlled by a pneumatic telescopic rod control cable with one main circuit and two branches, and a control handle for easy pulling is fixed at the movable end of the pneumatic telescopic rod control cable.

7. A seat lumbar support controlled by a dual drive mechanism according to claim 1, 2 or 3, characterized in that: The lumbar support body and the control seat are indirectly fixed via a flexible connector made of a flexible material that can deform in multiple directions. One end of the flexible connector is fixed to the lumbar support body, and the other end is fixed to the control seat.

8. A seat lumbar support controlled by a dual drive mechanism according to claim 7, characterized in that: The flexible connector is a rubber flexible connector or a silicone flexible connector or a spring flexible connector, and / or the flexible connector is provided with penetrating honeycomb structure holes.

9. A seat lumbar support controlled by a dual drive mechanism according to claim 7, characterized in that: The lumbar support body is fixedly provided with a lumbar support fixing piece, and one end of the flexible connecting body is fixedly connected to the lumbar support fixing piece.

10. A seat, comprising a seat body and a lumbar support structure, characterized in that: A seat lumbar support controlled by a dual drive mechanism as described in any one of claims 1 to 9 is adopted, a frame fixing piece is fixedly arranged at the lower end of the seat back frame, and the seat back frame is fixedly connected to the seat body through the frame fixing piece.

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