CN213940234U

CN213940234U - Foldable seat backrest

Info

Publication number: CN213940234U
Application number: CN202022924261.6U
Authority: CN
Inventors: 唐丽莉
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-08-13
Anticipated expiration: 2030-12-09

Abstract

The utility model relates to a chair especially relates to a folding backrest. It includes the cushion, install the handrail in the cushion both sides, and with the back that the handrail is connected, the handrail including the handrail portion that is used for gripping, with the back connecting portion that the back is connected, and with the cushion connecting portion that the cushion is connected, back connecting portion are equipped with the pivot, the back with the handrail passes through the pivot is rotated and is connected, the pivot will the back divide into back portion and ends shelves portion down, still including being used for ending shelves stop down the stopper of shelves portion antiport. The utility model discloses a design makes handrail and back rotate to be connected, have realized folding the stacking in transportation, the storage process, save space. Simultaneously, through the design stopper, reach the restriction back turned angle, provide the function of support for the human body when using to lean on.

Description

Foldable seat backrest

Technical Field

The utility model relates to a chair especially relates to a folding backrest.

Background

A chair is a seating device with a backrest and armrests, which is widely used in offices, meeting rooms, libraries and homes. In the prior art, the backrest and the cushion integrated chair are difficult to stack in the processes of storage, transportation, loading and unloading due to the fact that the backrest is not foldable, the occupied space is large, and finished products of storage and transportation are increased. Meanwhile, because the angle of the backrest is fixed, the requirements of different sitting postures in use cannot be met, and the comfort level and the applicability are lower.

In order to solve the problems, the patent document with the application number of CN201020286987.5 discloses a chair with a foldable backrest, which comprises a chair base, wherein the chair base is fixedly connected with the lower end of a vertical supporting column, the upper end of the supporting column is movably connected with a seat cushion tray, the upper surface of the seat cushion tray is fixedly connected with the lower surface of the seat cushion, two sides of the seat cushion are provided with handrails, the rear part of the seat cushion is provided with the backrest, the two sides of the rear lower part of the seat cushion are fixedly connected with the lower part of a connecting piece, the upper end of the connecting piece is movably connected with the side surface of the lower part of the backrest, the handrails are composed of vertical straight bars and horizontal cross beams, the lower ends of the straight bars are movably connected with the side surface of the middle part of the seat cushion, the rear ends of the cross beams are movably connected with the side surface of the middle part of the backrest, and the upper ends of the straight bars are movably connected with the front ends of the cross beams. Wherein, the chair need fold and expand through hasp control, and required part is more, complex operation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the above problem and provide a folding seat back that can solve transportation and use in the seat back can not fold, the big problem in occupation of land space.

The utility model provides a technical scheme of problem provides a folding seat back, including the cushion, install the handrail in the cushion both sides, and with the back that the handrail is connected, the handrail including the handrail portion that is used for gripping, with the back connecting portion that the back is connected, and with the cushion connecting portion that the cushion is connected, the back connecting portion are equipped with the pivot, the back with the handrail passes through the pivot is rotated and is connected, the pivot will the back divide into back portion and ends shelves portion down, still including being used for ending shelves stop portion antiport's stopper down.

The utility model discloses a design makes handrail and back rotate to be connected, have realized folding the stacking in transportation, the storage process, save space. Simultaneously, through the design stopper, reach the restriction back turned angle, provide the function of support for the human body when using to lean on.

As the utility model discloses preferably, the back including can supply the human body to lean on the face and with the back that the face is relative leans on, lean on the face with the stopper butt provides the support, the restriction for the human body back antiport.

As the utility model discloses preferentially the stopper is equipped with two, about cushion central line symmetric distribution makes the back atress is balanced, more firm.

As the utility model discloses preferably, cushion connecting portion are equipped with the connecting hole, the cushion passes through the connecting hole with cushion connecting portion connect.

In order to increase the use comfort of back makes human back curve of backrest laminating more provides the support for the waist, as the utility model discloses preferably, the back includes the frame and is located the inside support of frame, the leg joint has the regulation back cushion, the support is equipped with adjusts the back cushion, it is equipped with the mounting hole to adjust the back cushion, the support is equipped with the mount pad, adjust the back cushion with the support passes through the mounting hole with the mount pad is connected, and the user can select the installation or dismantle according to different in service behavior adjust the back cushion, and the accessible is in frame and the outside cladding sponge of support or other fillers make the back is softer, comfortable.

The utility model has the advantages that:

1. the utility model discloses a back and the handrail of connection are rotated in the design for the back can fold in seat transportation, storage process, saves space and transportation, storage cost.

2. The utility model discloses a design the stopper on the handrail and realize restricting back turned angle, for leaning on the function that the human body provided the support.

Drawings

FIG. 1 is a schematic view of a foldable seat back structure

FIG. 2 is a schematic view of the armrest structure

FIG. 3 is a schematic view of a backrest structure

FIG. 4 is a schematic view of a headrest mounting structure

In the figure: the seat cushion comprises a seat cushion 1, armrests 2, armrest parts 21, a backrest connecting part 22, a seat cushion connecting part 23, a connecting hole 231, a limiting block 24, a backrest 3, an upper backrest part 31, a lower stop part 32, a backrest surface 33, a back surface 34, an outer frame 35, a support 36, a mounting seat 361, a rotating shaft 4, an adjusting headrest 5 and a mounting hole 51.

Detailed Description

The following are embodiments of the present invention and the accompanying drawings are used to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

A foldable seat backrest, as shown in fig. 1-3, comprising a seat cushion 1, armrests 2 installed on two sides of the seat cushion 1, and a backrest 3 connected with the armrests 2, wherein the armrests 2 comprise armrest parts 21 for holding, backrest connecting parts 22 connected with the backrest 3, and a seat cushion connecting part 23 connected with the seat cushion 1, the backrest connecting parts 22 are provided with rotating shafts 4, the backrest 3 and the armrests 2 are rotatably connected through the rotating shafts 4, the rotating shafts 4 divide the backrest 3 into an upper backrest part 31 and a lower stop part 32, and further comprise limit blocks 24 for stopping the reverse rotation of the lower stop part 32; back 3 including can supply the human body to lean on face 33 and with lean on the back 34 that face 33 is relative, lean on face 33 with stopper 24 butt, stopper 24 is equipped with two, about 1 central line symmetric distribution of cushion, cushion connecting portion 23 is equipped with connecting hole 231, cushion 1 passes through connecting hole 231 with cushion connecting portion 23 is connected.

In this embodiment, the backrest 3 is formed by injection molding, and is externally wrapped with sponge and canvas, so that the softness and comfort of the backrest 3 are increased, and the backrest 3 is in a curved surface shape, so that the backrest 3 is fitted with the curve of the waist of a human body; the cushion 1 is a square wood board, and is coated with sponge and canvas to increase softness; the handrail 2 is in a shape of a Chinese character kou, the middle part of the handrail is hollow, round corners are arranged on the periphery of the handrail, and the handrail is integrally formed by injection molding; the seat cushion 1 and the armrest 2 are in threaded connection through the connecting hole 231; the backrest 3 and the armrest 2 are provided with through holes at the backrest connecting part 22, one end of the rotating shaft 4 is inserted into the through hole of the armrest 2, the other end of the rotating shaft is inserted into the through hole of the backrest connecting part 22, so that the backrest 3 and the armrest 2 form rotating connection, and a bearing is arranged in the through hole of the backrest connecting part 22 to reduce friction resistance.

As shown in fig. 4, the backrest 3 includes an outer frame 35 and a bracket 36 located inside the outer frame 35, and the bracket 36 is connected with the adjusting headrest 5. Adjust the back cushion 5 and be equipped with mounting hole 51, support 36 is equipped with mount pad 361, adjust the back cushion 5 with support 36 passes through mounting hole 51 reaches mount pad 361 connects.

In this embodiment, adjust back cushion 5 injection moulding, for the arc, the outside cladding is by sponge and canvas, increases compliance, can install as required, through the screw connection adjust back cushion 5 the mounting hole 51 with support 36 the installation can be accomplished to the mount pad 361.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a folding seat back, includes cushion (1), install handrail (2) in cushion (1) both sides, and with back (3) that handrail (2) are connected, its characterized in that: handrail (2) including handrail portion (21) that is used for gripping, with back connecting portion (22) that back (3) are connected, and with cushion connecting portion (23) that cushion (1) are connected, back connecting portion (22) are equipped with pivot (4), back (3) with handrail (2) pass through pivot (4) are rotated and are connected, pivot (4) will back (3) divide into back portion (31) and lower gear portion (32), still including being used for the gear stop down gear portion (32) antiport's stopper (24).

2. A foldable seat back according to claim 1, wherein: the backrest (3) comprises a leaning surface (33) for leaning on by a human body and a back surface (34) opposite to the leaning surface (33), and the leaning surface (33) is abutted to the limiting block (24).

3. A foldable seat back according to claim 1, wherein: the number of the limiting blocks (24) is two, and the limiting blocks are symmetrically distributed about the central line of the seat cushion (1).

4. A foldable seat back according to claim 1, wherein: cushion connecting portion (23) are equipped with connecting hole (231), cushion (1) pass through connecting hole (231) with cushion connecting portion (23) are connected.

5. A foldable seat back according to claim 1, wherein: the backrest (3) comprises an outer frame (35) and a support (36) located inside the outer frame (35), and the support (36) is connected with an adjusting back cushion (5).

6. A foldable seat back according to claim 5, wherein: adjust back cushion (5) and be equipped with mounting hole (51), support (36) are equipped with mount pad (361), adjust back cushion (5) with support (36) pass through mounting hole (51) and mount pad (361) are connected.