Waist support adjusting mechanism for office chair

Abstract

The utility model provides a waist support adjusting mechanism for an office chair, and belongs to the technical field of office chairs. A waist support adjusting mechanism for an office chair comprises a chair body, and the chair body comprises a seat, a backrest and a base; the chair seat is connected with the backrest, and the base is fixed at the bottom of the chair seat; an adjusting groove is formed in the center of the backrest, a plurality of hydraulic cylinders are fixed in the adjusting groove, the hydraulic cylinders are fixedly connected with pushing blocks, the pushing blocks are provided with first guide rails, and the first guide rails are slidably connected with a first waist rest; inclined parts are further symmetrically fixed to the two sides of the backrest, limiting frames are installed on the surfaces of the inclined parts, second guide rails are arranged in the limiting frames, second sliding blocks are connected to the second guide rails in a sliding mode, arc-shaped installation frames are fixed to the second sliding blocks, third guide rails are installed on the arc-shaped installation frames, and the third guide rails are connected to the second sliding blocks in a sliding mode. The third guide rail is connected with a second waist rest in a sliding mode. The chair has the advantage of being more comfortable.

Description

Technical Field

[0001] The utility model belongs to the technical field of office chairs, in particular to a lumbar support adjustment mechanism for office chairs. Background Art

[0002] As a common seat for company employees, office chairs are used very frequently. Existing office chairs are generally equipped with lumbar supports, but the lumbar supports of existing office chairs are set in the center of the chair. When people lean on the lumbar supports of office chairs, some people may need to turn their waists to work on the left or right side. When people turn to the left or right side, the lumbar supports on the office chairs cannot play a good role in supporting the waist, and one side of the waist will be empty, which is easy to cause waist pain over time. Summary of the invention

[0003] The utility model aims to solve the above problems in the prior art and proposes a lumbar support adjustment mechanism for an office chair, which has the advantage of being more comfortable.

[0004] The purpose of the utility model can be achieved through the following technical solutions: A lumbar support adjustment mechanism for an office chair, comprising a seat body, the seat body comprising a seat, a backrest and a base; the seat is connected to the backrest, and the base is fixed to the bottom of the seat;

[0005] An adjustment slot is provided in the center of the backrest, a plurality of hydraulic cylinders are fixed in the adjustment slot, a push block is fixedly connected to the hydraulic cylinder, a first guide rail is provided on the push block, and a first lumbar support is slidably connected to the first guide rail;

[0006] Inclined parts are symmetrically fixed on both sides of the backrest, a limit frame is installed on the surface of the inclined part, a second guide rail is provided in the limit frame, a second sliding block is slidably connected to the second guide rail, an arc-shaped mounting frame is fixed on the second sliding block, a third guide rail is installed on the arc-shaped mounting frame, and a second lumbar support is slidably connected to the third guide rail.

[0007] Preferably, the first lumbar support comprises a first sliding block, a lumbar support plate and a lumbar support cushion, the first sliding block is slidably matched with the first guide rail, the lumbar support plate is fixed on the first sliding block, and the lumbar support cushion is installed on the lumbar support plate.

[0008] Preferably, the first guide rail has a first sliding portion, the first sliding block has a first sliding groove, and the first sliding portion is slidably matched with the first sliding groove.

[0009] Preferably, the second guide rail has a second sliding portion, the second sliding block has a second sliding groove, and the second sliding portion is slidably matched with the second sliding groove.

[0010] Preferably, the backrest also has a headrest.

[0011] Preferably, adjustable armrests are symmetrically mounted on both sides of the seat.

[0012] Preferably, the base includes a lifting rod, a supporting foot and a universal wheel installed at the bottom of the supporting foot, a lifting rod for lifting is fixed to the bottom of the seat, a connecting column is fixed to one end of the bottom of the lifting rod, and a plurality of supporting feet are installed on the connecting column.

[0013] Compared with the prior art, the advantages of the utility model are:

[0014] 1. By arranging a first lumbar support that can move in the front-to-back direction and the up-down direction in the center of the backrest, it is convenient to flexibly adjust the position of the first lumbar support in the front-to-back direction and the up-down direction, so as to adjust it to the most comfortable position for the user, and it is more practical;

[0015] 2. At the same time, a second lumbar support that can move up and down and along the arc-shaped mounting frame is provided on the inclined parts added on both sides of the backrest; it is beneficial to adjust the second lumbar support on the inclined part according to the waist position of the user after turning the waist, and adjust it to the most comfortable position for the user, which is beneficial to be more comfortable, convenient and quick to adjust, and more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a side view of the utility model.

[0017] Figure 2 It is a front view of the backrest and seat structure of the utility model.

[0018] Figure 3 It is a cross-sectional view of AA in the present utility model.

[0019] Figure 4 It is a structural diagram of one of the inclined portion upper mechanisms and the second lumbar support of the utility model.

[0020] In the figure, 2, seat; 21, adjustable armrest; 3, backrest; 31, adjustment slot; 32, hydraulic cylinder; 33, push block; 34, first guide rail; 341, first sliding part; 35, first lumbar support; 351, first sliding block; 3511, first sliding slot; 352, lumbar support plate; 353, lumbar support cushion; 36, inclined part; 361, limit frame; 362, second guide rail; 3621, second sliding part; 363, second sliding block; 3631, second sliding slot; 364, arc-shaped mounting frame; 365, third guide rail; 366, second lumbar support; 4, base; 41, lifting rod; 42, supporting foot; 43, universal wheel; 5, headrest. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figures 1 to 4 As shown, a lumbar support adjustment mechanism for an office chair comprises a seat body, the seat body comprises a seat 2, a backrest 3 and a base 4; the seat 2 is connected to the backrest 3, and the base 4 is fixed to the bottom of the seat 2; an adjustment slot 31 is provided in the center of the backrest 3, a plurality of hydraulic cylinders 32 are fixed in the slot of the adjustment slot 31, a push block 33 is fixedly connected to the hydraulic cylinder 32, a first guide rail 34 is provided on the push block 33, a first guide rail 34 is slidably connected to the first lumbar support 35; inclined portions 36 are also symmetrically fixed on both sides of the backrest 3, a limit position frame 361 is installed on the surface of the inclined portion 36, a second guide rail 362 is provided in the limit position frame 361, a second slide block 363 is slidably connected to the second guide rail 362, an arc-shaped mounting frame 364 is fixed to the second slide block 363, a third guide rail 365 is installed on the arc-shaped mounting frame 364, a second lumbar support 366 is slidably connected to the third guide rail 365.

[0023] In the present invention, the hydraulic cylinder 32 is prior art.

[0024] With the above structure, an adjustment slot 31 is provided at the central position of the backrest 3, and a hydraulic cylinder 32 is provided in the adjustment slot 31. The piston rod on the hydraulic cylinder 32 can drive the push block 33 to push forward or backward. At the same time, a first lumbar support 35 is provided on the first guide rail 34 of the push block 33 to slide upward or downward, which is conducive to flexible adjustment of the position of the first lumbar support 35 in the front-back direction and the up-down direction, and is convenient for adjusting to the most comfortable position for the user, and is more practical. At the same time, a limit frame 361 is provided on the inclined portion 36 added on both sides of the backrest 3, and the limit frame 361 is provided through the second guide rail 34. The rail 362 is provided with a second sliding block 363 which slides upward or downward. The third guide rail 365 which is added to the arc-shaped mounting frame 364 on the second sliding block 363 and along the surface of the arc-shaped mounting frame 364 can slide and cooperate with the second lumbar support 366. When the user turns his waist or body to the left or right, the second lumbar support 366 on the inclined portion 36 can be adjusted to the most comfortable position for the user according to the waist position of the user after turning his waist, which is conducive to greater comfort, convenient and quick adjustment, stronger practicality, and enhances the user's comfort.

[0025] Specifically, if Figures 1 to 4As shown, the first lumbar support 35 includes a first sliding block 351 , a lumbar support plate 352 and a lumbar support cushion 353 , the first sliding block 351 is slidably matched with the first guide rail 34 , the lumbar support plate 352 is fixed on the first sliding block 351 , and the lumbar support cushion 353 is installed on the lumbar support plate 352 .

[0026] By adopting the above structure, by setting the first sliding block 351 on the first lumbar support 35, the first sliding block 351 slides with the first guide rail 34, which is conducive to more conveniently adjusting the first lumbar support 35 in the form of an up and down direction on the pushing block 33. By setting the lumbar support cushion 353, it is conducive to making the user more comfortable when using the first lumbar support 35, thereby improving the user's comfort.

[0027] like Figures 1 to 4 As shown, the first guide rail 34 has a first sliding portion 341, the first sliding block 351 has a first sliding groove 3511, and the first sliding portion 341 and the first sliding groove 3511 are slidably matched, which is conducive to convenient adjustment and stable structure.

[0028] like Figures 1 to 4 As shown, the second guide rail 362 has a second sliding portion 3621, the second sliding block 363 has a second sliding groove 3631, and the second sliding portion 3621 slidably cooperates with the second sliding groove 3631. The second sliding portion 3621 slidably cooperates with the second sliding groove 3631, which facilitates the second sliding block 363 to quickly adjust upward or downward on the limit frame 361, which is more convenient and quick.

[0029] like Figures 1 to 4 As shown, the backrest 3 is also provided with a headrest 5. The headrest 5 is provided to improve the comfort of the user's head and neck.

[0030] like Figures 1 to 4 As shown, adjustable armrests 21 are symmetrically installed on both sides of the seat 2. By providing the adjustable armrests 21, it is convenient for the user to put his arms on the adjustable armrests 21, thereby improving the comfort of the arms.

[0031] like Figures 1 to 4 As shown, the base 4 includes a lifting rod 41, a supporting foot 42, and a universal wheel 43 installed at the bottom of the supporting foot 42. The lifting rod 41 for lifting is fixed at the bottom of the seat 2, and a connecting column is fixed at one end of the bottom of the lifting rod 41, and a plurality of supporting feet 42 are installed on the connecting column. By setting the lifting rod 41, the height of the seat 2 can be flexibly adjusted, so as to adapt to the sitting posture of users with different body shapes, and the practicability is stronger; at the same time, by setting the universal wheel 43, it is convenient to move the seat body.

[0032] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. At the same time, the meaning of "and / or" appearing in the full text is that it includes three schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] The above components are all common standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0035] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A lumbar support adjustment mechanism for an office chair, comprising a seat body, characterized in that: The chair body comprises a seat (2), a backrest (3) and a base (4); the seat (2) is connected to the backrest (3), and the base (4) is fixed to the bottom of the seat (2); An adjustment groove (31) is provided in the center of the backrest (3), a plurality of hydraulic cylinders (32) are fixed in the adjustment groove (31), a push block (33) is fixedly connected to the hydraulic cylinder (32), a first guide rail (34) is provided on the push block (33), and a first lumbar support (35) is slidably connected to the first guide rail (34); The backrest (3) is symmetrically fixed with inclined parts (36) on both sides, and a limit frame (361) is installed on the surface of the inclined part (36). The limit frame (361) has a second guide rail (362) in it, and a second sliding block (363) is slidably connected to the second guide rail (362). The second sliding block (363) is fixed with an arc-shaped installation frame (364), and a third guide rail (365) is installed on the arc-shaped installation frame (364). The third guide rail (365) is slidably connected to a second lumbar support (366).

2. The lumbar support adjustment mechanism for an office chair according to claim 1, characterized in that: The first lumbar support (35) comprises a first sliding block (351), a lumbar support plate (352) and a lumbar support cushion (353); the first sliding block (351) is slidably matched with the first guide rail (34); the lumbar support plate (352) is fixed on the first sliding block (351); and the lumbar support cushion (353) is installed on the lumbar support plate (352).

3. The lumbar support adjustment mechanism for an office chair according to claim 2, characterized in that: The first guide rail (34) has a first sliding portion (341), the first sliding block (351) has a first sliding groove (3511), and the first sliding portion (341) and the first sliding groove (3511) are slidably matched.

4. The lumbar support adjustment mechanism for an office chair according to claim 1, characterized in that: The second guide rail (362) has a second sliding portion (3621), the second sliding block (363) has a second sliding groove (3631), and the second sliding portion (3621) and the second sliding groove (3631) are slidably matched.

5. The lumbar support adjustment mechanism for an office chair according to claim 1, characterized in that: The backrest (3) is also provided with a headrest (5).

6. The lumbar support adjustment mechanism for an office chair according to claim 1, characterized in that: Adjustable armrests (21) are symmetrically mounted on both sides of the chair seat (2).

7. The lumbar support adjustment mechanism for an office chair according to claim 1, characterized in that: The base (4) comprises a lifting rod (41), a supporting foot (42) and a universal wheel (43) mounted at the bottom of the supporting foot (42); a lifting rod (41) for lifting is fixed at the bottom of the seat (2); a connecting column is fixed at one end of the bottom of the lifting rod (41), and a plurality of supporting feet (42) are mounted on the connecting column.

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