Adjustable chassis structure for rotary chair

Abstract

The utility model discloses an adjustable chassis structure for a rotary chair, which comprises a chassis main body, a chair seat arranged at the upper end of the chassis main body, a backrest arranged at the rear end of the chassis main body, a back connecting bracket connected between the chassis main body and the backrest, and a chassis frame positioned at the front end of the chassis main body, a frame body is integrally positioned on the side of the back connecting support, a seat support is arranged at the upper end of the chassis frame, a sliding seat is movably arranged on the seat support, and a second turning point is arranged between the frame body and the sliding seat. According to the adjustable chassis structure for the rotary chair, the chassis backward-moving adjusting structure with the turning points and the forward-leaning control structure are arranged, in the backrest backward-leaning process, through adjustment between the double turning points, the sliding grooves and the chassis, the chassis cannot lean backwards and tilt upwards, the adjustable chassis structure is more comfortable to use, forward-leaning control adjustment can be achieved in the working process, and the working efficiency is improved. The leg and the back can be better supported, and the chair is simple and practical.

Description

TECHNICAL FIELD

[0001] The utility model relates to swivel chair chassis technical field, especially a kind of adjustable chassis structure for swivel chair. BACKGROUND

[0002] Adjustable chassis structure for swivel chair is a base for supporting chair seat, which can support the hips of users, and can be lifted and rotated, facilitating office work, and is an important component of swivel chair. With the continuous development of science and technology, people have higher and higher requirements for the manufacturing process of adjustable chassis structure for swivel chair.

[0003] The existing chassis structure for swivel chair has certain drawbacks in use. First, the existing chassis structure for swivel chair is usually connected to the backrest in an integrated manner. When the backrest is tilted backward, the chassis will tilt backward with the backrest, causing the footboard to lift off the ground. Long-term use will reduce the comfort of use. When working, the feet, legs and waist are at a right angle. At this time, the back and backrest will have a certain distance, and the foot and leg positions are relatively uncomfortable, which brings certain adverse effects to the actual use process. Therefore, we propose an adjustable chassis structure for swivel chair. SUMMARY

[0004] To overcome the shortcomings of the prior art, the present utility model provides an adjustable chassis structure for swivel chair, which is provided with a rear-point chassis rearward adjustment structure and a forward tilting control structure. During the tilting of the backrest, the chassis is adjusted between the double turning points and the sliding groove, so that the chassis does not tilt backward and lift off the ground, and the use is more comfortable. When working, the forward tilting control adjustment can better support the legs and back, and the simple and practical structure can effectively solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of an adjustable chassis structure for swivel chair, which comprises a chassis main body, a seat is arranged at the upper end of the chassis main body, a backrest is arranged at the rear end of the chassis main body, a back connecting bracket is connected between the chassis main body and the backrest, a chassis frame is positioned at the front end of the chassis main body, a frame body is integrally positioned at the side of the back connecting bracket, a seat bracket is arranged at the upper end of the chassis frame, a sliding seat is movably arranged on the seat bracket, a second turning point is arranged between the frame body and the sliding seat, a sliding groove is arranged on the inner side of the seat bracket, and a first turning point is arranged between the back connecting bracket and the chassis main body.

[0006] Preferably, the backrest reclining angle is adjusted by the backrest reclining locking structure, the backrest forward angle is adjusted by the backrest forward locking structure, the inside of the chassis body is provided with the backrest reclining locking structure, the backrest forward locking structure, the lifting adjusting structure and the backrest reclining gravity adjusting structure, the side of the chassis body is provided with the backrest forward control wrench and the backrest reclining control wrench, and the side of the backrest reclining gravity adjusting structure is provided with the backrest reclining gravity adjuster.

[0007] Preferably, the back connecting support is fixed between the backrest and the backrest through a bolt, and the backrest is movably adjusted at the rear end position of the chassis body through the back connecting support and a first rotation point.

[0008] Preferably, the back connecting support and the frame body are integrally positioned, the frame body and the sliding seat are movably adjusted through a second rotation point, the sliding seat moves forward and backward in the inside position of the seat support through a sliding groove, the backrest drives the back connecting support and the frame body to move backward at the rear end of the chassis body when the backrest reclines, and simultaneously drives the sliding seat to move backward in the inside of the seat support through the second rotation point.

[0009] Preferably, when resting, the user leans on the backrest to recline backward, and is locked through the backrest reclining locking structure after reclining to a certain angle, and the backrest reclining gravity is adjusted through the backrest reclining gravity adjusting structure and the backrest reclining gravity adjuster.

[0010] Preferably, when working, the body is forward inclined, at this time, the backrest is forward inclined to support the back, is locked through the backrest forward locking structure, and is adjusted through the backrest forward control wrench.

[0011] Advantages: compared with the prior art, the adjustable chassis structure for a swivel chair has the following advantages: the adjustable chassis structure for a swivel chair is provided with a rotation point type chassis rear moving adjusting structure and a backrest forward control structure, the chassis cannot be upward inclined during the backrest reclining process, the use is more comfortable, the forward inclination control adjusting can be controlled when working, the leg and back support can be better, the back connecting support and the frame body are integrally positioned, the frame body and the sliding seat are movably adjusted through a second rotation point, the sliding seat moves forward and backward in the inside position of the seat support through a sliding groove, the backrest drives the back connecting support and the frame body to move backward at the rear end of the chassis body when the backrest reclines, and simultaneously drives the sliding seat to move backward in the inside of the seat support through the second rotation point, when resting, the user leans on the backrest to recline backward, and is locked through the backrest reclining locking structure after reclining to a certain angle, and the backrest reclining gravity is adjusted through the backrest reclining gravity adjusting structure and the backrest reclining gravity adjuster; when working, the body is forward inclined, at this time, the backrest is forward inclined to support the back, is locked through the backrest forward locking structure, and is adjusted through the backrest forward control wrench, the whole adjustable chassis structure for a swivel chair is simple in structure, convenient to operate, and has a better use effect relative to the traditional mode.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is the whole structure schematic view of the adjustable chassis structure for the swivel chair of the utility model.

[0013] Fig. 2 It is the structure schematic view of the chassis main body inside one of the adjustable chassis structure for the swivel chair of the utility model.

[0014] Fig. 3 It is the structure schematic view of the chassis main body inside two of the adjustable chassis structure for the swivel chair of the utility model.

[0015] In the drawing: 1, chassis main body;2, seat;3, backrest;4, first rotation point;5, back connecting support;6, frame body;7, second rotation point;8, sliding seat;9, sliding groove;10, seat support;11, chassis frame;12, back leaning locking structure;13, forward leaning locking structure;14, lifting adjusting structure;15, back leaning gravity adjusting structure;16, back leaning gravity adjuster;17, forward leaning control wrench;18, back leaning control wrench. DETAILED DESCRIPTION

[0016] The technical scheme of the utility model will be described clearly and completely below in combination with the drawings and specific embodiments.

[0017] As Figs. 1-3 shown, an adjustable chassis structure for a swivel chair, comprising a chassis main body 1, the upper end of the chassis main body 1 is provided with a seat 2, the rear end of the chassis main body 1 is provided with a backrest 3, the backrest 3 is connected between the chassis main body 1 and the back connecting support 5, the front end of the chassis main body 1 is positioned with the chassis frame 11, the side of the back connecting support 5 is integrally positioned with the frame body 6, the upper end of the chassis frame 11 is provided with the seat support 10, the seat support 10 is movably provided with the sliding seat 8, the second rotation point 7 is arranged between the frame body 6 and the sliding seat 8, the inner side of the seat support 10 is provided with the sliding groove 9, the first rotation point 4 is arranged between the back connecting support 5 and the chassis main body 1, the backrest leaning control structure and the forward leaning control structure are provided, in the process of backrest leaning, the adjustment is carried out between the double rotation points, the sliding groove and the chassis, the chassis will not appear the situation of leaning up, it is more comfortable to use, it can be controlled and adjusted when working, it can better support the legs and the back, it is simple and practical.

[0018] Further, the back leaning locking structure 12 adjusts the backrest 3 back leaning angle, the forward leaning locking structure 13 adjusts the backrest 3 forward leaning angle, the inside of the chassis main body 1 is installed with the back leaning locking structure 12, the forward leaning locking structure 13, the lifting adjusting structure 14 and the back leaning gravity adjusting structure 15, the side of the chassis main body 1 is provided with the forward leaning control wrench 17 and the back leaning control wrench 18, the side of the back leaning gravity adjusting structure 15 is provided with the back leaning gravity adjuster 16.

[0019] Further, the back connecting bracket 5 is fixed with the backrest 3 by bolts, and the backrest 3 is adjusted in the rear end position of the chassis body 1 through the back connecting bracket 5 and the first turning point 4.

[0020] Further, the back connecting bracket 5 is fixed with the backrest 3 by bolts, and the backrest 3 is adjusted in the rear end position of the chassis body 1 through the back connecting bracket 5 and the first turning point 4.

[0021] Further, when resting, the user leans on the backrest 3 and leans back, and after leaning back to a certain angle, the backrest 3 is locked by the back leaning locking structure 12, and the back leaning gravity is adjusted by the back leaning gravity adjusting structure 15 and the back leaning gravity adjuster 16.

[0022] Further, when working, the body is forward inclined, at this time, the backrest 3 is forward inclined, the backrest 3 supports the back, and is locked by the forward leaning locking structure 13, and is adjusted by the forward leaning control wrench 17.

[0023] Working principle: the utility model discloses a chassis main body 1, chair seat 2, backrest 3, first rotation point 4, back connecting support 5, frame body 6, second rotation point 7, sliding seat 8, sliding groove 9, seat support 10, chassis frame 11, back leaning locking structure 12, forward leaning locking structure 13, lifting adjusting structure 14, back leaning gravity adjusting structure 15, back leaning gravity regulator 16, forward leaning control wrench 17, back leaning control wrench 18, and back connecting support 5 and frame body 6 are integrated positioning, and frame body 6 and sliding seat 8 are adjusted through second rotation point 7, and sliding seat 8 moves back and forth in the inboard position of seat support 10 through sliding groove 9, and backrest 3 leans back and drives back connecting support 5, frame body 6 to lean back and move in the rear end of chassis main body 1, and simultaneously drive sliding seat 8 to move back in the inboard of seat support 10 through second rotation point 7, when resting, the user leans on backrest 3 and leans back, and leans back and locks through back leaning locking structure 12 after leaning back a certain angle, and leans back gravity is adjusted through back leaning gravity adjusting structure 15, back leaning gravity regulator 16, when working, body leans forward, backrest 3 leans forward, makes backrest 3 support back, and locks through forward leaning locking structure 13, and adjusts through forward leaning control wrench 17, is equipped with the back moving adjusting structure of rotation point type chassis and forward leaning control structure, leans back in the process of backrest, adjusts through double rotation point, sliding groove and chassis, and the chassis does not appear the situation of leaning back and up, is more comfortable to use, can lean forward control adjustment when working, can better carry out leg and back support, simple and practical. The basic principle and main features of the utility model and the advantages of the utility model are shown and described. The skilled person in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and the description in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed.

Claims

1. An adjustable base structure for a swivel chair, comprising a base body (1), a back reclining locking structure (12), and a front reclining locking structure (13), characterized in that: The upper end of the chassis body (1) is provided with a seat (2), the rear end of the chassis body (1) is provided with a backrest (3), the chassis body (1) and the backrest (3) are connected with a back connecting support (5), the front end of the chassis body (1) is positioned with a chassis frame (11), the inside of the chassis body (1) is installed with a back leaning locking structure (12), a forward leaning locking structure (13), the back leaning locking structure (12) adjusts the back leaning angle of the backrest (3), the forward leaning locking structure (13) adjusts the forward leaning angle of the backrest (3), the side of the back connecting support (5) is integrally positioned with a frame body (6), the upper end of the chassis frame (11) is provided with a seat support (10), the seat support (10) is movably provided with a sliding seat (8), the frame body (6) and the sliding seat (8) are provided with a second turning point (7), the inside of the seat support (10) is provided with a sliding groove (9), the back connecting support (5) and the chassis body (1) are provided with a first turning point (4).

2. The adjustable base structure for a swivel chair according to claim 1, wherein: The inside of the chassis body (1) is also installed with a lifting adjusting structure (14) and a back leaning gravity adjusting structure (15), the side of the chassis body (1) is provided with a forward leaning control wrench (17) and a back leaning control wrench (18), the side of the back leaning gravity adjusting structure (15) is provided with a back leaning gravity adjuster (16).

3. The adjustable base structure for a swivel chair according to claim 1, wherein: The back connecting support (5) and the backrest (3) are fixed by bolts, the backrest (3) is movably adjusted at the rear end position of the chassis body (1) through the back connecting support (5) and the first turning point (4).

4. The adjustable base structure for a swivel chair according to claim 1, wherein: The back connecting support (5) and the frame body (6) are integrally positioned, the frame body (6) and the sliding seat (8) are movably adjusted through the second turning point (7), the sliding seat (8) moves forward and backward in the inside position of the seat support (10) through the sliding groove (9), when the backrest (3) leans back, the back connecting support (5) and the frame body (6) lean back movably at the rear end of the chassis body (1), and at the same time, the sliding seat (8) is moved backward in the inside of the seat support (10) through the second turning point (7).

5. The adjustable base structure for a swivel chair according to claim 2, wherein: When resting, the user leans back on the backrest (3) and locks through the back leaning locking structure (12) after leaning back to a certain angle, and adjusts the back leaning gravity through the back leaning gravity adjusting structure (15) and the back leaning gravity adjuster (16).

6. The adjustable base structure for a swivel chair according to claim 2, wherein: When working, the body leans forward, at this time, the backrest (3) leans forward, the backrest (3) supports the back, and is locked through the forward leaning locking structure (13), and is adjusted through the forward leaning control wrench (17).

Images