CN107898200B

CN107898200B - Chair back

Info

Publication number: CN107898200B
Application number: CN201711402862.7A
Authority: CN
Inventors: 李婷
Original assignee: Shenzhen Microtouch Ergonomic Technology Co ltd
Current assignee: Shenzhen Microtouch Ergonomic Technology Co ltd
Priority date: 2017-12-22
Filing date: 2017-12-22
Publication date: 2024-06-04
Anticipated expiration: 2037-12-22
Also published as: CN107898200A

Abstract

The invention relates to a chair back, which comprises a supporting mechanism, a telescopic mechanism arranged on the supporting mechanism and a back board arranged on the telescopic mechanism, wherein the supporting mechanism comprises a supporting frame, an adjusting rod and a rotating wheel which are arranged on the supporting frame, a spring arranged on the adjusting rod and connected with the rotating wheel, and a pull rope penetrating and winding on the rotating wheel, one end of the pull rope is connected with the spring, and the other end of the pull rope is connected with the telescopic mechanism. The runner comprises a main body part and an adjusting part, and the pull rope passes through the main body part to be abutted with the main body part and the adjusting part. The chair back has the advantages of high comfort, elasticity in contraction, automatic adaptation to the position of a user, difficulty in damage, adjustment according to the use condition and contribution to the health of a person who uses the chair for a long time.

Description

Chair back

Technical Field

The invention relates to the technical field of office furniture, in particular to a chair back.

Background

With the development of economy, people have higher requirements on offices or living environments, office furniture and home furniture have wider markets in China, and seats are one of main office furniture and home furniture, so that comfort and attractiveness of the seats become important indexes when people select to use. The existing chair back is generally arranged on the chair back support through a fastener, the chair back can not move after being fixed, and people can only lean on the chair back in a fixed posture, so that the comfort level of the chair is greatly reduced. The common chair back does not have shrinkage elasticity, cannot automatically adapt to the position of a user, can not play a supporting role in many times, is used for a period of time or is too hard when leaning against, and is easy to damage fasteners, and the chair back is damaged and falls off, so that the chair is scrapped.

Disclosure of Invention

Based on the above, it is necessary to provide a chair back which has high comfort, has elasticity to retract and is not easily damaged, in order to solve the problems of the chair back.

A seat back comprising: the device comprises a supporting mechanism, a telescopic mechanism arranged on the supporting mechanism and a backboard arranged on the telescopic mechanism; the supporting mechanism comprises a supporting frame, an adjusting rod and a rotating wheel which are arranged on the supporting frame, a spring which is arranged on the adjusting rod and connected with the adjusting rod, and a pull rope which is wound on the rotating wheel in a penetrating way, wherein one end of the pull rope is connected with the spring, and the other end of the pull rope is connected with the telescopic mechanism; the rotating wheel comprises a main body part and an adjusting part, and the pull rope passes through the main body part to be abutted with the main body part and the adjusting part.

The chair back comprises a supporting mechanism, a telescopic mechanism arranged on the supporting mechanism and a backrest plate arranged on the telescopic mechanism, and is arranged on the corresponding part of the chair through the supporting mechanism when in use. The adjusting rod, the rotating wheel, the spring and the pull rope of the supporting mechanism form a force output system with relatively constant supporting force, and the starting state of the backboard is extended. When a user sits on the chair and presses the backboard, the telescopic mechanism can be compressed horizontally on the supporting mechanism until the user feels comfortable, and when the chair is not used, the telescopic mechanism can be reset to the starting state under the action of the force output system. Because the length of the arm of force of the adjusting part of the rotating wheel and the stay cord can be adaptively changed along with the stretching length of the spring, a relatively constant supporting force can be formed, and a user can obtain the relatively constant supporting force at different positions, so that the comfort level is high. The chair back has high comfort, elasticity and difficult damage, and is beneficial to the health of long-term chair work or learners.

In one embodiment, the device further comprises a pneumatic rod, wherein the pneumatic rod is installed in the supporting mechanism and connected with the telescopic mechanism.

In one embodiment, the device further comprises a locking clamp, and the locking clamp is installed on the telescopic mechanism and is arranged opposite to the supporting frame.

In one embodiment, the locking catch is provided with a plurality of catches.

In one embodiment, the support frame is provided with a plurality of positioning tooth grooves, and the positioning tooth grooves are matched with the clamping teeth.

In one embodiment, the telescopic mechanism comprises a telescopic sleeve seat arranged on the supporting frame and a stress block arranged on the inner wall of the telescopic sleeve seat, and the stress block is connected with the pull rope.

In one embodiment, two pivoting seats are installed on the backboard, and the pivoting seats are pivoted with the telescopic sleeve seat.

In one embodiment, the support frame comprises a mounting seat, a first support arm and two second support arms, wherein the first support arm and the two second support arms are mounted on the mounting seat, the second support arms are connected with the first support arm, and the second support arms are connected with the rotating wheel.

In one embodiment, the adjusting rod is a threaded rod, a threaded hole is formed in the mounting seat, and the adjusting rod is mounted on the mounting seat through the threaded hole.

In one embodiment, the adjustment portion is provided in a scroll-like arrangement.

Drawings

FIG. 1 is a schematic view of a seat back according to a preferred embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the seat back of FIG. 1;

FIG. 3 is a schematic view of a chair back according to another embodiment of the present invention;

FIG. 4 is a schematic view of a seat back according to yet another embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of the seat back of FIG. 4;

FIG. 6 is a schematic view of a support bracket in the chair back of FIG. 1;

FIG. 7 is a schematic view of a support bracket in the seat back of FIG. 4;

FIG. 8 is an enlarged schematic view of the seat back of FIG. 5 at circle A;

FIG. 9 is a schematic view of a wheel in the seat back of FIG. 5;

FIG. 10 is a schematic diagram of a force analysis of the present invention;

FIG. 11 is a schematic diagram of another force analysis according to the present invention;

The drawings are marked with the following description:

100-chair back, 20-supporting mechanism, 21-supporting frame, 22-adjusting rod, 23-rotating wheel, 24-spring, 25-stay cord, 211-mounting seat, 212-first supporting arm, 213-second supporting arm, 214-travel opening, 215-positioning tooth socket, 231-main body part, 232-adjusting part, 233-threading hole, 234-supporting shaft, 30-telescopic mechanism, 31-telescopic sleeve seat, 32-stress block, 40-backboard, 41-pivoting seat, 42-supporting concave surface, 50-air pressure bar, 60-locking clamp, 61-clamping tooth, 200-chair back and 300-chair back.

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1 and 2, in an embodiment of the invention, a chair back 100 includes a support mechanism 20, a telescopic mechanism 30 mounted on the support mechanism 20, and a back rest 40 mounted on the telescopic mechanism 30, wherein the telescopic mechanism 30 can perform telescopic motion on the support mechanism 20, and the back rest 40 can rotate on the telescopic mechanism 30 to adjust an angle.

Referring to fig. 6 again, the supporting mechanism 20 includes a supporting frame 21, an adjusting rod 22 and a rotating wheel 23 mounted on the supporting frame 21, a spring 24 mounted on the adjusting rod 22 and connected with the adjusting rod, and a pull rope 25 wound on the rotating wheel 23, wherein one end of the pull rope 25 is connected with the spring 24, and the other end of the pull rope 25 is connected with the telescopic mechanism 30. Further, the support frame 21 includes a mounting base 211, a first support arm 212 mounted on the mounting base 211, and two second support arms 213, wherein the second support arm 213 is connected to the first support arm 212, and the second support arm 213 is connected to the rotating wheel 23. The adjusting rod 22 is a threaded rod, a threaded hole is formed in the mounting seat 211, the adjusting rod 22 is mounted on the mounting seat 211 through the threaded hole, and the initial strength of the spring 24 can be adjusted by rotating the adjusting rod 22 when the spring is used. In other embodiments, the adjusting lever 22 may be provided with a plurality of clamping grooves on the outside, and the clamping positioning is completed in combination with the movable clamping tongue installed on the mounting seat 211, so as to realize the initial strength of the adjusting spring. Wherein a travel opening 214 is formed between the two second support arms 213, the travel opening 214 facilitates the force applied by the telescopic mechanism 30 when it is telescopic and is not blocked.

Referring to fig. 9 again, the rotating wheel 23 includes a main body 231 and an adjusting portion 232, and the pulling rope 25 passes through the main body 231 and abuts against the main body 231 and the adjusting portion 232. The main body 231 is provided with a threading hole 233 and two support shafts 234, the threading hole 233 is used for the pull rope 25 to pass through, the support shafts 234 are supported on the second support arm 213, the adjusting part 232 is in a vortex shape, the distance from the outer edge of the vortex-shaped adjusting part 232 to the center of the support shaft 234 is gradually increased along the anticlockwise direction, and the length of a force arm formed by the pull rope 25 abutting against the adjusting part 232 along with the rotation of the rotating wheel 23 is also changed.

The telescopic mechanism 30 comprises a telescopic sleeve seat 31 arranged on the support frame 21 and a stress block 32 arranged on the inner wall of the telescopic sleeve seat 31, the stress block 32 is connected with the pull rope 25, and the pull rope 25 can provide force for the telescopic sleeve seat 31 through the stress block 32 under the action of the spring 24. The back board 40 is provided with two pivoting seats 41, the pivoting seats 41 are pivoted with the telescopic sleeve seat 31, and a user can adjust the angle of the back board 40 through the pivoting seats 41, so that the comfort level is improved. The back board 40 is provided with a supporting concave surface 42, the supporting concave surface 42 is positioned on one side of the back board 40, which is opposite to the telescopic sleeve seat 31, and the supporting concave surface 42 can prevent a user from sliding down to two sides when the user leans back.

The chair back 100 comprises a support mechanism 20, a telescopic mechanism 30 arranged on the support mechanism 20, and a backboard 40 arranged on the telescopic mechanism 30, and is arranged on the corresponding part of the chair through the support mechanism 20 when in use. The adjusting lever 22, the rotating wheel 23, the spring 24 and the pull rope 25 of the supporting mechanism 20 form a force output system with relatively constant supporting force, and the starting state of the backboard 40 is extended. When a user sits on the chair against the back plate 40, the telescopic mechanism 30 can be compressed horizontally on the support mechanism 20 until the user feels comfortable, and when not in use, the telescopic mechanism 30 can be reset to the starting state under the action of the force output system. Because the arm length of the adjusting part 232 of the rotating wheel 23 and the pull rope 25 can be adaptively changed along with the stretching length of the spring 24, a relatively constant supporting force can be formed, and a user can obtain the relatively constant supporting force at different positions, so that the comfort level is high. The chair back 100 has high comfort, elasticity, and is not easy to damage, and is beneficial to the health of a long-term chair work or a learner.

Referring to fig. 3, a seat back 200 according to another embodiment of the present invention is different from the seat back 100 in that a pneumatic rod 50 is further provided. The chair back 200 comprises a supporting mechanism 20, a telescopic mechanism 30 arranged on the supporting mechanism 20, a backboard 40 arranged on the telescopic mechanism 30 and a pneumatic rod 50, wherein the telescopic mechanism 30 can do telescopic motion on the supporting mechanism 20, and the backboard 40 can rotate on the telescopic mechanism 30 to adjust the angle. Because the pneumatic rod 50 is installed in the supporting mechanism 20 and is connected with the telescopic mechanism 30, when the telescopic mechanism 30 and the backrest plate 40 are stressed and compressed in use, the pneumatic rod 50 is stressed and compressed, the spring 24 is stressed and stretched, and the two are combined to provide larger supporting force, so that the telescopic mechanism is suitable for people with larger weight and has large supporting strength. When not in use, the telescoping mechanism 30 and the back plate 40 can be reset to the starting state under the action of the springs 24 and the pneumatic rods 50.

Referring to fig. 4,5, 7 and 8, a chair back 300 according to another embodiment of the present invention is shown, and the chair back 300 is different from the chair back 100 in that a locking catch 60 is further provided. The chair back 300 comprises a supporting mechanism 20, a telescopic mechanism 30 arranged on the supporting mechanism 20, a backboard 40 arranged on the telescopic mechanism 30 and a locking clamp 60, wherein the telescopic mechanism 30 can do telescopic motion on the supporting mechanism 20, and the backboard 40 can rotate on the telescopic mechanism 30 to adjust the angle. It is conceivable that in the present embodiment, the air pressure lever 50 may be installed inside the supporting mechanism 20 to form a new solution for improving the supporting strength. Further, the locking clamp 60 is mounted on the telescopic sleeve seat 31 of the telescopic mechanism 30 and is opposite to the supporting frame 21, a plurality of clamping teeth 61 are arranged on the locking clamp 60, a plurality of positioning tooth grooves 215 are arranged on the supporting frame 21, and the positioning tooth grooves 215 are matched with the clamping teeth 61. When the locking clamp hand 60 is broken to separate the clamping teeth 61 from the positioning tooth grooves 215, the telescopic mechanism 30 and the backboard 40 can be telescopic, and when the locking clamp hand 60 is broken to clamp the clamping teeth 61 into the positioning tooth grooves 215, the telescopic mechanism 30 is fixed and does not move under stress.

Referring to fig. 10 and 11, schematic diagrams of the generation of the supporting force provided in the internal force output system of the supporting mechanism 20 according to the present invention are shown. As shown in fig. 10, when the spring 24 is shorter and the seatback is longest, the moment m1=l1×f1 at the spring end, where f1=kx1, m1=l1×f1×x1 (where K is a fixed spring constant, L1 is the moment arm length at the current position, M1 is the moment at the current position, and X1 is the spring extension at the current position). As shown in fig. 11, when the spring 24 is long and the seatback level is shortest, the moment m2=l2×f2 at the spring end, where f2=kx2, m2=l2×f2×x2 (where K is a fixed spring constant, L2 is the moment arm length at the current position, M2 is the moment at the current position, and X2 is the spring extension at the current position).

Since the spring constant K of the same spring in the above two different states is unchanged, m1=m2 if l1×x1=l2×x2, if we are in the different extension states Xn of the spring, we set the adjusting portion 232 of the wheel 23 to provide the corresponding arm length Ln, ensuring ln×xn=l1×x1=l2×x2, and mn=m1=m2. By the principle, the moment of the spring can be kept basically constant (relatively constant and can be influenced by factors such as friction force) at any length, and meanwhile, the supporting force of the output end is relatively constant, so that the comfort level is improved.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. A chair back, characterized in that it comprises: a support mechanism, a telescopic mechanism installed on the support mechanism, and a backrest plate installed on the telescopic mechanism; a support concave surface is provided on the backrest plate, and the support concave surface is located on the side of the backrest plate facing away from the telescopic mechanism; the support mechanism comprises a support frame, an adjustment rod and a rotating wheel installed on the support frame, a spring installed and connected to the adjustment rod, and a pull rope passed through the rotating wheel, one end of the pull rope is connected to the spring, and the other end of the pull rope is connected to the telescopic mechanism; the rotating wheel comprises a main body and an adjusting part, and the pull rope passes through the main body and abuts against the main body and the adjusting part.

2. The chair back according to claim 1 is characterized in that it also includes a gas pressure rod, which is installed in the supporting mechanism and connected to the telescopic mechanism.

3. The chair back according to claim 1 or 2, characterized in that it also includes a locking latch, wherein the locking latch is installed on the telescopic mechanism and is arranged opposite to the support frame.

4. The chair back according to claim 3, characterized in that the locking handle is provided with a plurality of teeth.

5. The chair back according to claim 4, characterized in that a plurality of positioning tooth grooves are provided on the support frame, and the positioning tooth grooves are adapted to the latch teeth.

6. The chair back according to claim 3, characterized in that the telescopic mechanism comprises a telescopic sleeve mounted on the support frame, a force-bearing block mounted on the inner wall of the telescopic sleeve, and the force-bearing block is connected to the pull rope.

7. The chair back according to claim 6, characterized in that two pivot seats are installed on the backrest plate, and the pivot seats are pivotally connected to the telescopic sleeve.

8. The chair back according to claim 1, characterized in that the support frame includes a mounting seat, a first support arm mounted on the mounting seat, and two second support arms, the second support arm is connected to the first support arm, and the second support arm is connected to the rotating wheel.

9 . The chair back according to claim 8 , wherein the adjusting rod is a threaded rod, the mounting seat is provided with a threaded hole, and the adjusting rod is mounted on the mounting seat through the threaded hole.

10 . The seat back according to claim 1 , wherein the adjusting portion is arranged in a spiral shape.