Seat back-attaching waist rest capable of being steplessly adjusted in multiple directions and seat

Abstract

The invention relates to a multidirectional stepless adjustable chair back-attaching waist rest and a chair, which comprise a chair backrest framework, a waist rest body, a first support arm, a second support arm and a driving mechanism, and are characterized in that one end of the first support arm is fixed with the waist rest body, the other end of the first support arm is rotatably connected with the second support arm, and the second support arm is rotatably connected with the chair backrest framework; the driving mechanism comprises a driving end and a fixed end, the driving end faces the lower portion of the seat backrest framework, is rotationally connected with the seat backrest framework through the fixed end and is rotationally connected with the second supporting arm through the driving end, and the driving mechanism is further provided with a control element; the driving end of the driving mechanism can drive the second supporting arm to rotate relative to the first supporting arm along with opening and closing of the control element to achieve folding and unfolding, the first supporting arm is indirectly driven to turn over, and synchronous front, back, up and down displacement of the waist rest body is achieved. Stepless adjustment of the waist rest body in the vertical direction and the front-back direction is achieved, and circumferential multi-angle stepless adjustment of the waist and the back is further achieved.

Description

Technical Field

[0001] The invention relates to a seat backrest and a seat which can be adjusted steplessly in multiple directions, and belongs 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 invention 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 invention 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, and cannot achieve stepless adjustment of the waist and back up and down, and cannot achieve stepless adjustment of the waist and back at multiple angles in the circumferential direction. The present invention aims to solve this technical problem by changing the adjustment structure of the lumbar support and changing the assembly connection method to achieve convenient multi-directional stepless adjustment of the lumbar support. Summary of the invention

[0004] One of the objectives of the present invention is to solve the deficiencies of the prior art in that the seat lumbar support is fixedly non-adjustable, or manual adjustment of its angle and vertical position is required to reach a position suitable for the back posture, or only stepless adjustment of the upper and lower parts of the lumbar and back can be achieved, and to provide a seat lumbar support capable of convenient multi-directional stepless adjustment.

[0005] Another objective of the present invention is to provide a seat configured with the multi-directional stepless adjustment seat lumbar support of the present invention. Based on the adjustment structure of the lumbar support, the assembly connection method is changed to enable the lumbar support to be conveniently adjusted in multiple directions without steps, greatly improving the convenience and comfort of seat use.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0007] A seat back lumbar support capable of multi-directional stepless adjustment, comprising a seat back frame, a lumbar support body, a first support arm, a second support arm, and a driving mechanism. The feature is that one end of the first support arm is fixed to the lumbar support body, and the other end is rotatably connected to the second support arm. The second support arm is rotatably connected to the seat back frame. The driving mechanism includes a driving end and a fixed end. The driving end is arranged towards the lower part of the seat back frame, rotatably connected to the seat back frame through the fixed end, and rotatably connected to the second support arm through the driving end. The driving mechanism is further provided with a control element;

[0008] The driving end of the driving mechanism can drive the second support arm to rotate relative to the first support arm to realize folding and unfolding with the opening and closing of the control element, indirectly driving the flipping of the first support arm to realize the synchronous front, rear, up, and down displacement of the lumbar support body.

[0009] As described above, the seat lumbar support of the prior art is fixedly non-adjustable, or manual adjustment of its angle and vertical position is required to reach a position suitable for the back posture, or only stepless adjustment of the upper and lower parts of the lumbar and back can be achieved. The technical solution of the present invention, through the structural design and reasonable layout of the first and second support arms, can achieve efficient synchronous front, rear, up, and down four-range adaptive position conditions under the action of the driving mechanism, improving the comfort of users.

[0010] Preferably, the driving mechanism is a telescopic driving component, including any one of a pneumatic telescopic driving component, a hydraulic telescopic driving component, and an electric telescopic driving component. The seat back frame is provided with a driving component fixing part, and the fixed end of the driving mechanism is rotatably connected to the driving component fixing part. The pneumatic telescopic driving component, the hydraulic telescopic driving component, and the electric telescopic driving component are all common driving mechanisms, with simple structures, convenient maintenance and installation, and also convenient for manual operation.

[0011] Preferably, the telescopic drive assembly is a pneumatic telescopic drive assembly, the control element is a pneumatic telescopic rod 12 control cable, and the drive assembly fixing member is a fixed cross bar provided on the seat back frame.

[0012] Preferably, a control handle for easy pulling is fixedly provided at the movable end of the control cable of the pneumatic telescopic rod 12 .

[0013] Preferably, the lumbar support body and the first support arm are indirectly fixed by 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 first support arm. Under this preferred solution structure, the lumbar support body can be adjusted in multiple directions in 360° circumferential direction.

[0014] 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.

[0015] Preferably, the seat back frame is fixedly provided with a second support arm fixing piece, the second support arm is rotatably connected to the second support arm fixing piece, and the second support arm fixing piece is another fixed cross bar provided on the seat back frame.

[0016] Preferably, the first support arm is provided with a receiving cavity, and when the first support arm and the second support arm are folded toward each other, the lower end of the second support arm and the driving end of the telescopic driving assembly can be embedded in the receiving cavity, so that the thickness of the side surface after storage is smaller, which is convenient for storage and space saving, and is easy to transport.

[0017] Preferably, the second support arm is in an arch shape and two groups are arranged in parallel, with the middle part protruding toward the side close to the seat back frame, so as to facilitate staggering with the first support arm structure when stored and improve the support toughness.

[0018] A seat includes a seat body and a lumbar support structure, which adopts the aforementioned multi-directional steplessly adjustable seat back lumbar support, 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.

[0019] The beneficial effects of the present invention are as follows: the present invention realizes stepless adjustment of the lumbar support body up, down, front and back, and further realizes stepless adjustment of the waist and back at multiple angles in the circumferential direction. By changing the adjustment structure of the lumbar support and changing the assembly connection method, the lumbar support can be conveniently and steplessly adjusted in multiple directions. The seat equipped with the multi-directional stepless adjustment seat lumbar support of the present invention, based on the adjustment structure of the lumbar support, changes the assembly connection method, realizes the convenient and multi-directional stepless adjustment of the lumbar support, greatly improving the convenience and comfort of the seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2 is a schematic structural diagram of the present invention;

[0023] Figure 3 is a schematic structural diagram of the present invention;

[0024] Figure 4 is a schematic side view structural diagram of the present invention in the unfolded state;

[0025] Figure 5 is a schematic side view structural diagram of the present invention in the stored state;

[0026] Figure 6 is a schematic rear view structural diagram of the present invention.

[0027] The reference numerals in the drawings are described separately as follows: 10, fixed cross bar; 11, pneumatic telescopic rod control cable; 12, pneumatic telescopic rod; 13, seat back frame; 14, frame fixing member; 15, second support arm; 16, first support arm; 17, lumbar support body; 18, flexible connecting member; 19, frame connecting member; 20, pull-out plate; 21, hinge joint. Detailed Embodiments

[0028] The following will elaborate on the preferred embodiments of the present invention in conjunction with the 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.

[0029] Embodiment: As Figure 1-6 shown, a seat back lumbar support that can be adjusted infinitely in multiple directions includes a seat back frame 13, a seat back frame 17, a first support arm 16, a second support arm 15, and a driving mechanism. One end of the first support arm 16 is fixed to the seat back frame 17, and the other end is rotatably connected to the second support arm 15. The second support arm 15 is rotatably connected to the seat back frame 13. The driving mechanism includes a driving end and a fixed end. The driving end is arranged below the seat back frame 13 and is rotatably connected to the seat back frame 13 through the fixed end and rotatably connected to the second support arm 15 through the driving end. The driving mechanism is also provided with a control element;

[0030] The driving end of the driving mechanism can drive the second support arm 15 to rotate relative to the first support arm 16 to achieve folding and unfolding with the opening and closing of the control element, indirectly driving the flipping of the first support arm 16 to achieve synchronous front, rear, up, and down displacements of the seat backrest frame 17.

[0031] As described above, the seat lumbar support of the prior art is fixedly non-adjustable, or it is necessary to manually adjust its angle and up and down position to reach a position suitable for the back posture, or it can only achieve the deficiency of stepless adjustment of the upper and lower parts of the waist and back. A seat lumbar support capable of convenient multi-directional stepless adjustment is provided. According to the technical solution of the present invention, through the structural design and reasonable layout of the first and second support arms, under the action of the driving mechanism, efficient synchronous front, rear, up, and down four-range adaptive position conditions can be achieved, improving the comfort of users.

[0032] In this embodiment, the driving mechanism is a telescopic driving assembly, including any one of a pneumatic telescopic driving assembly, a hydraulic telescopic driving assembly, and an electric telescopic driving assembly. The seat backrest frame 13 is provided with a driving assembly fixing member, and the fixed end of the driving mechanism is rotatably connected to the driving assembly fixing member. The pneumatic telescopic driving assembly, the hydraulic telescopic driving assembly, and the electric telescopic driving assembly are all common driving mechanisms, with simple structures, convenient maintenance and installation, and also convenient for manual operation.

[0033] Specifically in this embodiment, the telescopic driving assembly is a pneumatic telescopic driving assembly, the control element is a pneumatic telescopic rod 12 controlling a wire 11, and the driving assembly fixing member is a first fixed cross bar 10 provided on the seat backrest frame 13.

[0034] Specifically in this embodiment, a manipulation handle convenient for pulling is fixedly provided at the movable end of the pneumatic telescopic rod 12 controlling the wire 11.

[0035] Specifically in this embodiment, the seat backrest frame 17 and the first support arm 16 are indirectly fixed through a flexible connection body made of a flexible material capable of multi-directional deformation. One end of the flexible connection body is fixed to the seat backrest frame 17, and the other end is fixed to the first support arm 16. Under the structure of this preferred solution, 360° circumferential multi-directional adjustment of the seat backrest frame 17 can be achieved.

[0036] Specifically in this embodiment, the flexible connection body is a rubber flexible connection body, a silicone flexible connection body, or a spring flexible connection body, and / or a honeycomb-like structure hole is provided through the flexible connection body.

[0037] Specifically in this embodiment, the seat backrest frame 13 is fixedly provided with a second support arm 15 fixing member, and the second support arm 15 is rotatably connected between the second support arm 15 fixing members. The second support arm 15 fixing member is a second fixed cross bar 10 provided on the seat backrest frame 13.

[0038] Specifically in this embodiment, the first support arm 16 is provided with a receiving cavity, and when the first support arm 16 and the second support arm 15 are folded toward each other, the lower end of the second support arm 15 and the driving end of the telescopic driving assembly can be embedded in the receiving cavity, so that the thickness of the side surface after storage is smaller, which is convenient for storage and space saving, and is easy to transport.

[0039] Specifically in this embodiment, the second support arm 15 is in an arch shape and is arranged in two groups in parallel, with the middle portion protruding toward the side close to the seat back frame 13. This facilitates staggering with the first support arm 16 structure when stored and improves the support toughness.

[0040] The present invention further discloses a seat, including a seat body and a lumbar support structure, which adopts the aforementioned multi-directional stepless adjustable seat back lumbar support, and a frame fixing member 14 is fixedly arranged at the lower end of the seat back frame 13, and the seat back frame 13 is fixedly connected to the seat body through the frame fixing member 14. The frame fixing member 14 includes a frame connecting member 19 fixed to the seat back frame 13 by bolts, and a pull-out plate 20 vertically slidably inserted in the frame connecting member 19, wherein the lower end of the pull-out plate 20 is provided with a threaded hole and is fixed to the seat base by bolts, and two threaded holes are provided on the frame connecting member 19 for fixing the relative position between the pull-out plate 20 and the frame connecting member 19, so that the height of the seat back frame 13 and the integral components arranged on the seat back frame 13 can be adjusted to make the applicable adjustment range of the lumbar support larger.

[0041] In specific implementation, after the device is installed on the adapted seat frame, the height of the seat back frame 13 can be adjusted to a certain extent by loosening the bolts to stretch the frame connector 19 relative to the drawer plate 20, so as to adapt to people of different heights, and then sit on the chair and lean back on the lumbar support body 17. When we do not pull the pneumatic telescopic rod control pull line 11, the position of the lumbar support body 17 is limited to a specified position under the support of the pneumatic telescopic rod 12 to provide strong support for our back. In addition, the design of the flexible connector 18 can make the lumbar support body 17 twisted by its own flexible deformation under slight adjustment of the back twisting left and right, so as to better fit the back, reduce muscle tension and improve comfort.

[0042] When we pull the pneumatic telescopic rod control pull wire 11, the pneumatic telescopic rod 12 can be in a floating state. At this time, the lumbar support body 17 can always fit the back and adjust its position accordingly. When we release the pneumatic telescopic rod control pull wire 11, the position of the lumbar support body 17 is adjusted, which is very convenient.

[0043] The beneficial effects of the present invention are as follows: The present invention realizes stepless adjustment of the upper, lower, front and rear of the seat backrest frame, and it is even more impossible to realize stepless adjustment of the waist and back in multiple circumferential angles. By changing the adjustment structure of the lumbar support and the assembly connection method, it is realized that the lumbar support can be conveniently adjusted steplessly in multiple directions. For a seat configured with the multi-directional stepless adjustment seat lumbar support of the present invention, based on the adjustment structure of the lumbar support, the assembly connection method is changed, so that the lumbar support can be conveniently adjusted steplessly in multiple directions, greatly improving the convenience and comfort of seat use.

[0044] The above-described embodiments are only a preferred solution of the present invention, and do not impose any form of limitation on the present invention. There are other variants and modifications without exceeding the technical solutions recorded in the claims.

Claims

1. A seat back lumbar support that can be adjusted infinitely in multiple directions, comprising a seat back frame, a lumbar support body, a first support arm, a second support arm, and a driving mechanism, characterized in that, One end of the first support arm is fixed to the lumbar support body, and the other end is rotatably connected to the second support arm. The second support arm is rotatably connected to the seat backrest frame. The driving mechanism includes a driving end and a fixed end. The driving end is arranged towards the lower part of the seat backrest frame, is rotatably connected to the seat backrest frame through the fixed end, and is rotatably connected to the second support arm through the driving end. The driving mechanism is also provided with a control element; The driving end of the driving mechanism can drive the second support arm to rotate relative to the first support arm to realize folding and unfolding with the opening and closing of the control element, indirectly driving the flipping of the first support arm to realize the front, rear, up and down displacement of the lumbar support body.

2. The multi-directional steplessly adjustable seat back lumbar support according to claim 1, characterized in that: The driving mechanism is a telescopic driving assembly, including any one of a pneumatic telescopic driving assembly, a hydraulic telescopic driving assembly and an electric telescopic driving assembly. The seat backrest frame is provided with a driving assembly fixing part, and the fixed end of the driving mechanism is rotatably connected to the driving assembly fixing part.

3. The multi-directional steplessly adjustable seat back lumbar support according to claim 2, wherein: The telescopic driving assembly is a pneumatic telescopic driving assembly, the control element is a pneumatic telescopic rod control wire, and the driving assembly fixing part is a fixed cross bar arranged on the seat backrest frame.

4. The multi-directional steplessly adjustable seat back lumbar support according to claim 3, characterized in that: The movable end of the pneumatic telescopic rod control wire is fixedly provided with a manipulation handle for easy pulling.

5. A multi-directional steplessly adjustable seat back lumbar support according to claim 1, characterized in that, The lumbar support body and the first support arm are indirectly fixed through a flexible connection body made of a flexible material that can be deformed in multiple directions. One end of the flexible connection body is fixed to the lumbar support body, and the other end is fixed to the first support arm.

6. The multi-directional steplessly adjustable seat back lumbar support according to claim 5, characterized in that, The flexible connection body is a rubber flexible connection body or a silicone flexible connection body or a spring flexible connection body, and / or the flexible connection body is provided with a through honeycomb structure hole.

7. The multi-directional steplessly adjustable seat back lumbar support according to claim 1, characterized in that, The seat backrest frame is fixedly provided with a second support arm fixing part, and the second support arm is rotatably connected between the second support arm fixing parts. The second support arm fixing part is another fixed cross bar arranged on the seat backrest frame.

8. The multi-directional steplessly adjustable seat back lumbar support according to claim 4, wherein, The first support arm is provided with a receiving cavity. When the first support arm and the second support arm are folded towards each other, the lower end of the second support arm and the driving end of the telescopic driving assembly can be embedded in the receiving cavity.

9. The multi-directional steplessly adjustable seat back lumbar support according to claim 1, wherein The second support arm is in an arc shape, and two groups are arranged in parallel, and the middle part thereof bulges towards the side close to the seat backrest frame.

10. A seat, comprising a seat main body and a lumbar support structure, characterized in that, The multi-directional steplessly adjustable seat back lumbar support according to any one of claims 1-9 is adopted, and a frame fixing part is fixedly arranged at the lower end of the seat backrest frame, and the seat backrest frame is fixedly connected to the seat body through the frame fixing part.

Images