CN215304363U

CN215304363U - Backrest height adjusting device

Info

Publication number: CN215304363U
Application number: CN202022192332.8U
Authority: CN
Inventors: 魏罡; 吴媛媛; 林玮; 吴涛; 董晓武; 林文荣
Original assignee: Zhangzhou Aojiahua Health Technology Co Ltd; Xiamen Lefan Health Technology Co ltd
Current assignee: Zhangzhou Aojiahua Health Technology Co Ltd; Xiamen Lefan Health Technology Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-12-28
Anticipated expiration: 2030-09-29

Abstract

The utility model relates to a backrest height adjusting device which comprises a back cushion assembly and a back plate, wherein the back plate is provided with at least one guide rod, the back cushion assembly is connected to the guide rod in a sliding mode, and a locking mechanism for locking the back cushion assembly to slide is arranged on the back plate or the back cushion assembly. The backrest height adjusting device provided by the utility model can adjust the comfortable backrest height suitable for the back of a user according to the body shape of the user, and is simple in structure and convenient to operate.

Description

Backrest height adjusting device

Technical Field

The utility model relates to a chair, in particular to a backrest height adjusting device.

Background

Along with the continuous improvement of the life quality of people, the living habits of people are changed along with the improvement, people can sit on a chair after going home, drive a car on the road, and go to a company to sit in an office, and the chair can bring great burden to the back of the waist after long-time sitting, and can generate strain of the lumbar vertebra over time to cause unrepairable diseases and pains. Therefore, in order to relieve fatigue or lumbar diseases and the like caused by sitting posture, backrest products have been produced.

The height of back product on the back of the chair can not be adjusted according to everybody's height to present back product, and the back travelling comfort influences to some extent, if will carry out altitude mixture control, needs borrow professional instrument and adjusts, wastes time and energy, influences the structural stability of back product simultaneously.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to overcome the above-mentioned deficiencies of the prior art and to provide a backrest height adjusting device.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

the utility model provides a back height adjusting device, includes back of the body pad subassembly and backplate, the backplate is equipped with two piece at least parallel guide bars, back of the body pad subassembly sliding connection in on the guide bar, the backplate or be equipped with the locking on the back of the body pad subassembly the gliding locking mechanism of back of the body pad subassembly.

Preferably, the back cushion assembly comprises a sliding plate, a left cushion plate and a right cushion plate, sliding grooves are formed in the back plate for assisting in limiting the two sides of the sliding plate, and the two sides of the sliding plate move in the sliding grooves.

Preferably, the locking mechanism is arranged on the back cushion assembly, the locking mechanism comprises a movable support piece and a propelling unit, the propelling unit is used for pushing the movable support piece to reciprocate, and the front end of the movable support piece is used for being supported on the guide rod.

Preferably, the left base plate and the right base plate are connected to the sliding plate through torsion springs respectively, and the torsion springs respectively provide circumferential torsion of the left base plate and the right base plate around the upper direction and the lower direction.

Preferably, the propulsion unit is a worm gear or a cam mechanism.

Preferably, one end of the movable supporting piece is a round rod head and is fixedly connected with the propelling unit, and the other end of the movable supporting piece is provided with a blocking handle which is used for being supported on the guide rod through friction force.

Preferably, the two sides of the back plate are respectively provided with a binding band mounting hole, and the binding band mounting holes are respectively connected to two ends of a binding band.

Preferably, the bottom of the back plate is also provided with an anti-slip strip or is connected with a seat plate.

The utility model also provides a chair with an adjustable backrest, which comprises the backrest height adjusting device.

Compared with the prior art, the utility model has the advantages that:

(1) the sliding plate and the back pad are connected to the back plate in a sliding mode through the double guide rods, the sliding grooves are formed in the two sides of the back plate to limit the two sides of the sliding plate, sliding is smooth, connection is reliable, the locking mechanism pushes the movable supporting piece to be supported on the guide rods through the pushing unit by means of friction force, the structure is simple, and locking is convenient;

(2) the back cushions are respectively connected to the sliding plate through the torsional springs, so that the back cushions can wrap the back of a user according to the back contour of the user when the user leans against the back, and the comfort level of the user is improved;

(3) the bottom of the back plate is provided with an anti-slip strip or is connected with a seat plate for preventing the bottom of the back plate from leaning backwards, so that the top of the back cushion is inclined forwards, and the inconvenience in adjustment is reduced.

Drawings

FIG. 1 is a schematic view of the construction of the present invention;

FIG. 2 is a schematic view of the installation of the skateboard;

FIG. 3 is an enlarged schematic view of FIG. 1A;

FIG. 4 is a schematic view of the construction of the movable support;

FIG. 5 is a schematic view of the installation of the torsion spring;

in the figure: 11-back cushion component, 2-back plate, 3-guide rod, 21-sliding groove, 22-binding belt mounting hole, 23-bolt hole, 24-seat plate, 31-movable supporting piece, 32-propelling unit, 41-round rod head, 42-blocking handle, 51-torsion spring, 52-first connecting plate and 53-second connecting plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, a backrest height adjusting device includes a back cushion assembly 11 and a back plate 12, the back plate 12 is provided with 2 parallel guide rods 3, the back cushion assembly 11 is slidably connected to the guide rods 3, and the back plate 12 or the back cushion assembly 11 is provided with a locking mechanism for locking the back cushion assembly to slide.

Referring to fig. 1 and 2, the back cushion assembly 11 includes a sliding plate, a left cushion plate and a right cushion plate, the back plate is provided with sliding grooves 21 for assisting in limiting two sides of the sliding plate, and two sides of the sliding plate move in the sliding grooves 21.

Adopt two guide bar 3 with slide and back of the body pad subassembly 11 sliding connection on backplate 12 to both sides are equipped with spout 21 on backplate 12 and are used for spacing slide both sides, and it is smooth and easy to slide, connect reliably, and locking mechanism promotes movable support piece 31 through propulsion unit and utilizes frictional force to support on guide bar 3, simple structure, and the locking is convenient.

Referring to fig. 3, the locking mechanism is disposed on the back pad assembly 11, the locking mechanism includes a movable support 31 and a pushing unit 32, the pushing unit 32 is used for pushing the movable support 31 to reciprocate, the front end of the movable support 31 is used for being supported by the guide rod 3, and the pushing unit 32 is a worm gear or a cam mechanism.

Referring to fig. 4, one end of the movable support 31 is a round rod head 41 fixedly connected to the propulsion unit 32, and the other end of the movable support is provided with a stop handle 42 for supporting the guide rod 3 by friction.

Referring to fig. 5, the left base plate and the right base plate are respectively connected to the sliding plate through a torsion spring 51, a first connecting plate 52 and a second connecting plate 53, the torsion spring 51 respectively provides the circumferential torsion force of the left base plate and the right base plate around the upper direction and the lower direction, and the back cushion is respectively connected to the sliding plate through the torsion spring 51, so that the back cushion can cover the back of a user according to the back contour of the user when leaning back, and the comfort level of leaning back is improved.

Referring to fig. 2, the two sides of the back plate are respectively provided with a binding band mounting hole 22, the binding band mounting holes 22 are respectively connected to two ends of a binding band, the binding band can be used for being bound on a seat with a backrest, the bottom of the back plate is connected with a seat plate, and the seat plate is used for increasing the friction area and playing a role in skid resistance.

The working principle of the utility model is as follows: the guide rod is kept away from one end of the movable support piece by using the propelling unit, the sliding plate and the back cushion are not limited by friction force, the sliding plate and the back cushion are manually slid up and down to enable the sliding plate and the back cushion to reach the required height, the movable support piece is close to the guide rod by the propelling unit, the sliding plate is supported on the guide rod by the friction force of the movable support piece and cannot slide, the structure is simple, and the adjustment is convenient.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.

Claims

1. A backrest height adjusting device characterized in that: including back of the body pad subassembly and backplate, the backplate is equipped with two piece at least parallel guide bars, back of the body pad subassembly sliding connection in on the guide bar, the backplate or be equipped with the locking on the back of the body pad subassembly the gliding locking mechanism of back of the body pad subassembly.

2. The backrest height adjusting apparatus of claim 1, wherein: the back cushion assembly comprises a sliding plate, a left base plate and a right base plate, sliding grooves are formed in the back plate for assisting in limiting the two sides of the sliding plate, and the two sides of the sliding plate move in the sliding grooves.

3. The backrest height adjusting apparatus of claim 1, wherein: the locking mechanism is arranged on the back cushion assembly and comprises a movable supporting piece and a propelling unit, the propelling unit is used for pushing the movable supporting piece to reciprocate, and the front end of the movable supporting piece is used for supporting the guide rod.

4. The backrest height adjusting apparatus of claim 2, wherein: the left base plate and the right base plate are connected to the sliding plate through torsion springs respectively, and the torsion springs respectively provide circumferential torsion of the left base plate and the right base plate which is axial in the vertical direction.

5. The backrest height adjusting apparatus of claim 3, wherein: the propulsion unit is a worm gear or a cam mechanism.

6. The backrest height adjusting apparatus of claim 3, wherein: one end of the movable support piece is a round rod head and is fixedly connected with the propelling unit, and the other end of the movable support piece is provided with a blocking handle which is used for being supported on the guide rod through friction force.

7. The backrest height adjusting apparatus of claim 1, wherein: the two sides of the back plate are respectively provided with a binding belt mounting hole, and the binding belt mounting holes are respectively connected to two ends of a binding belt.

8. The backrest height adjusting apparatus of claim 1, wherein: the bottom of the back plate is also provided with an anti-slip strip or is connected with a seat plate.

9. A seat with an adjustable backrest is characterized in that: comprising the backrest height adjusting device of any one of claims 1 to 8.