Chair back support structure

Abstract

The utility model discloses a chair back support structure, and belongs to the technical field of seats. The chair back support structure further comprises a chair back angle adjusting device capable of adjusting the angle between the first fixing plate and the seat and the angle between the second fixing plate and the seat. The lower end of the fixed plate I is fixedly connected with a motor I; the output end of the first motor is fixedly connected with a first lead screw. The first lead screw is in threaded connection with the sliding block. The sliding block is fixedly connected with the base; a pair of polished rods is arranged between the upper seat and the base; the upper seat is fixedly connected with the base through a pair of polished rods; by arranging the first motor, the sliding block and the first lead screw, the output end of the first motor drives the first lead screw to rotate, so that the distance between the base and the body of a user is adjusted, the distance between the longitudinal spine and waist and back supporting part of the chair back and the body of the user is changed, the supporting strength is changed, the requirements for different figures and different supporting strength can be met, and practicability is higher; and the comfort level of the chair back support is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to chair technology field, more specifically, relate to a chair back support structure. BACKGROUND

[0002] Office chair is an indispensable article in people's daily work and study. Common office chairs generally include a seat base and a backrest, and some office chairs are additionally provided with a waist rest and a headrest to improve the comfort of sitting.

[0003] For example, patent application No. CN202220218728.1 discloses a chair back support and a seat, which comprises a connecting support for connecting a seat base, and a waist rest, a backrest and a headrest installed on the connecting support. The backrest comprises two left and right back frames capable of swinging inward and outward. The inner end of each back frame is rotationally connected to the connecting support through a rotating shaft, and the outer end is connected to the connecting support through an elastic support. The chair back support and the seat provided by the utility model have the characteristic that the opening angle of the left and right back frames can be adjusted, and the comfort of leaning against them is better.

[0004] Although the above-mentioned chair back support and seat can adjust the opening angle, they cannot control the distance from the support to the user's body, so the support intensity cannot be adjusted. UTILITY MODEL CONTENTS

[0005] The utility model provides a chair back support structure to solve the above technical problems, which changes the distance from the longitudinal chair back to the spine and waist support part to the user's body, thereby changing the support intensity. It can adapt to different body sizes and different support intensity requirements, is more practical, and improves the comfort of the chair back support.

[0006] The chair back support structure comprises a fixed block one, two fixed blocks one, a fixed plate one fixedly connected to the two fixed blocks one, a pair of supports fixedly connected to the upper end of the fixed plate one, a fixed plate two fixedly connected to the upper end of the two supports, a chair back angle adjusting device capable of adjusting the angle between the fixed plate one and the seat, a sliding groove two formed in the fixed plate one, a sliding groove one formed in the fixed plate two corresponding to the sliding groove two, an upper seat slidingly connected in the sliding groove one, a base slidingly connected to the sliding groove two, a motor one fixedly connected to the lower end of the fixed plate one, a lead screw one fixedly connected to the output end of the motor one, a sliding block threadedly connected to the lead screw one, the sliding block and the base being fixedly connected, a pair of light rods arranged between the upper seat and the base, and the upper seat and the base being fixedly connected through the pair of light rods.

[0007] Preferably, the two upper ends of the fixed plate are slidingly connected with a second motor; the output end of the second motor is fixedly connected with a second lead screw; the second lead screw is rotatably connected with the upper seat and the base; the second lead screw is threadedly connected with a support plate; and the support plate is slidingly connected with a pair of light rods.

[0008] Preferably, the chair back angle adjusting device comprises at least two fixed blocks two, the two fixed blocks two are fixedly connected with the fixed blocks one on the same side, an installation block is arranged between the two fixed blocks two, the installation block is rotatably connected with two gears one on both sides, the two gears one are fixedly connected to rotate synchronously, the two gears one are fixedly connected with the fixed blocks two on the same side respectively, and the installation block is fixedly connected with a third motor on both sides.

[0009] Preferably, the material of the support plate is high-toughness resin.

[0010] Preferably, a bearing is arranged at the upper end of the base, and the inner ring of the bearing is fixedly connected with the lower end of the second lead screw.

[0011] Compared with the prior art, the chair back adjusting device has the beneficial effects that:

[0012] (1) The first motor, the sliding block and the first lead screw are arranged, the output end of the first motor drives the first lead screw to rotate, thereby adjusting the distance between the base and the user's body, changing the distance between the chair back longitudinal direction and the user's body, and changing the supporting degree, so that the chair back adjusting device can adapt to different body shapes and different supporting strength requirements, is more practical, and the comfort of the chair back supporting is improved.

[0013] (2) The second motor, the second lead screw and the support plate are arranged, the height of the support plate is adjusted, the user's waist is more fitted, and the comfort of the chair back supporting is improved.

[0014] (3) The installation block, the second gear, the first gear and the third motor are arranged, the rotation of the first gear can be adjusted at any time through the third motor, thereby controlling the rotation of the chair back, and the comfort of the chair back supporting is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a whole structure schematic view of the utility model;

[0016] Figure 2 It is an internal structure schematic view of the utility model.

[0017] Explanation of reference numerals in the figure: 10, fixed block one; 11, fixed plate one; 12, motor one; 13, sliding block; 14, lead screw one; 15, base; 16, support plate; 17, support; 18, lead screw two; 19, light pole; 20, upper seat; 21, fixed plate two; 22, motor two; 23, sliding groove one; 24, mounting block; 25, gear one; 26, motor three; 27, gear two; 28, fixed block two; 29, bearing; 30, sliding groove two. DETAILED DESCRIPTION

[0018] Specific embodiment one: please refer to Figures 1-2 A chair back support structure, comprising a fixed block one 10; the fixed block one 10 is two in number; two fixed block one 10 is fixedly connected with fixed plate one 11; the upper end of the fixed plate one 11 is fixedly connected with a pair of supports 17; the upper end of two supports 17 is fixedly connected with fixed plate two 21; further comprising a chair back angle adjusting device capable of adjusting the angle between fixed plate one 11 and fixed plate two 21 and the seat; the fixed plate one 11 is provided with sliding groove two 30; the fixed plate two 21 is provided with sliding groove one 23 corresponding to the sliding groove two 30; the sliding groove one 23 is slidably connected with the upper seat 20; the sliding groove two 30 is slidably connected with the base 15; the lower end of the fixed plate one 11 is fixedly connected with motor one 12; the output end of the motor one 12 is fixedly connected with lead screw one 14; the lead screw one 14 is threadedly connected with sliding block 13; the sliding block 13 is fixedly connected with the base 15; a pair of light poles 19 is arranged between the upper seat 20 and the base 15; the upper seat 20 and the base 15 are fixedly connected through a pair of light poles 19; by setting motor one 12, sliding block 13 and lead screw one 14, the output end of motor one 12 drives lead screw one 14 to rotate, thereby adjusting the distance between base 15 and the user's body, changing the distance between the longitudinal chair back and the user's body and the waist and back support part, thereby changing the support intensity, adapting to different body shapes and different support intensity requirements, being more practical, and improving the comfort of chair back support.

[0019] Please refer to Figure 1 The upper end of the fixed plate two 21 is slidably connected with motor two 22; the output end of the motor two 22 is fixedly connected with lead screw two 18; the lead screw two 18 is rotatably connected with the upper seat 20 and the base 15; the lead screw two 18 is threadedly connected with the support plate 16; the support plate 16 is slidably connected with a pair of light poles 19; by setting motor two 22, lead screw two 18 and support plate 16, the height of the support plate 16 is adjusted, which is more suitable for the user's waist, and improves the comfort of chair back support.

[0020] Please refer to Figure 1The chair back angle adjusting device comprises at least two fixed blocks two 28, and the same side fixed blocks two 28 are fixedly connected with the fixed block one 10; the two fixed blocks two 28 are provided with an installation block 24; the installation block 24 is rotatably connected with gear one 25 on both sides; the two gear one 25 are fixedly connected to make the two gear one 25 rotate synchronously; the two gear one 25 are fixedly connected with the same side fixed blocks two 28 respectively; the installation block 24 is fixedly connected with motor three 26 on both sides; the output end of each motor three 26 is fixedly connected with gear two 27; the same side gear two 27 is engaged with the gear one 25; through the installation block 24, the gear two 27, the gear one 25 and the motor three 26, the rotation of the gear one 25 can be controlled at any time through the motor three 26, and then the rotation of the chair back is controlled, and the comfort of the chair back support is improved.

[0021] Please refer to Figure 1 The material of the support plate 16 is high toughness resin.

[0022] Please refer to Figure 2 The bottom 15 is provided with a bearing 29 at the upper end; the inner ring of the bearing 29 is fixedly connected with the lower end of the screw rod two 18.

[0023] In work, the installation block 24 is fixed to the seat, the motor three 26 is started, the output end of the motor three 26 drives the gear two 27 to rotate, the gear two 27 drives the gear one 25 to rotate in the rotating process, the gear one 25 drives the fixed block two 28 to rotate in the rotating process, so that the fixed block one 10, the fixed plate one 11 and the fixed plate two 21 are rotated, and the angle of the chair back relative to the seat is changed;

[0024] The motor two 22 is started, the output end of the motor two 22 drives the screw rod two 18 to rotate, and the height of the support plate 16 is changed due to the threaded connection between the screw rod two 18 and the support plate 16, so as to adapt to the waist support of people with different body shapes;

[0025] When the user feels that the support strength of the support plate 16 is not comfortable, the motor one 12 is started, the output end of the motor one 12 drives the screw rod one 14 to rotate, and the bottom 15 moves in the rotating process of the screw rod one 14; according to the adjustment of the user, the bottom 15 is controlled to move forward or backward, so as to change the distance from the support plate 16 to the waist of the user, realize the purpose of controlling the support strength of the support plate 16 to the waist, change the distance from the longitudinal support to the waist of the user to control the support strength, and be more practical.

[0026] As used in the specification and claims, certain terms have particular meanings. Those of skill in the art will understand that one or more embodiments described herein can be implemented without those particular terms. Terms, such as those defined in the Dictionary of

[0027] It is to be understood that the terms "including", "comprising", "consisting" and "consisting essentially of" or any variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises, has, or consists of any feature recited herein is not limited to consisting only of the feature or consisting only of the feature plus sub-features.

[0028] The foregoing description discloses and describes a few preferred embodiments of the present application only, and it is understood that the application is not limited to these preferred embodiments, but is applicable to many other combinations, modifications and environments within the scope of the application as described in the appended claims.

Claims

1. A chair back support structure, comprising a fixed block one (10); the number of said fixed block one (10) is two; two said fixed block one (10) is fixedly connected with a fixed plate one (11); the upper end of said fixed plate one (11) is fixedly connected with a pair of supports (17); the upper end of two said supports (17) is fixedly connected with a fixed plate two (21); characterized in that, It also includes the backrest angle adjusting device capable of adjusting the angle of the fixed plate one (11), the fixed plate two (21) and the seat; the fixed plate one (11) is provided with a sliding groove two (30); the fixed plate two (21) is provided with a sliding groove one (23) corresponding to the sliding groove two (30); the sliding groove one (23) is slidably connected with the upper seat (20); the sliding groove two (30) is slidably connected with the base (15); the lower end of the fixed plate one (11) is fixedly connected with the motor one (12); the output end of the motor one (12) is fixedly connected with the lead screw one (14); the lead screw one (14) is threadedly connected with the sliding block (13); the sliding block (13) is fixedly connected with the base (15); a pair of light rods (19) are arranged between the upper seat (20) and the base (15); the upper seat (20) and the base (15) are fixedly connected through the pair of light rods (19).

2. A backrest support structure according to claim 1, wherein: The upper end of the fixed plate two (21) is slidably connected with the motor two (22); the output end of the motor two (22) is fixedly connected with the lead screw two (18); the lead screw two (18) is rotatably connected with the upper seat (20) and the base (15); the lead screw two (18) is threadedly connected with the support plate (16); the support plate (16) is slidably connected with the pair of light rods (19).

3. A backrest support structure according to claim 2, wherein: The backrest angle adjusting device at least includes the fixed block two (28); the number of the fixed block two (28) is two, and the fixed block two (28) on the same side is fixedly connected with the fixed block one (10); the mounting block (24) is arranged between the two fixed block two (28); the mounting block (24) is rotatably connected with the gear one (25) on both sides; the two gear one (25) are fixedly connected, so that the two gear one (25) rotate synchronously; the gear two (27) is fixedly connected with the fixed block two (28) on the same side; the mounting block (24) is fixedly connected with the motor three (26) on both sides; the output end of each motor three (26) is fixedly connected with the gear two (27); the gear two (27) on the same side is engaged with the gear one (25).

4. A backrest support structure according to claim 3, wherein: The material of the support plate (16) is high-toughness resin.

5. A backrest support structure according to claim 4, wherein: The upper end of the base (15) is provided with a bearing (29); the inner ring of the bearing (29) is fixedly connected with the lower end of the lead screw two (18).

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