CN220403537U

CN220403537U - Chair frame structure with linkage function

Info

Publication number: CN220403537U
Application number: CN202322031297.5U
Authority: CN
Inventors: 钱锟
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-07-31
Filing date: 2023-07-31
Publication date: 2024-01-30
Anticipated expiration: 2033-07-31

Abstract

The utility model provides a chair frame structure with a linkage function, which comprises a chair back connecting piece, wherein the upper end of the chair back connecting piece is hinged with a chair seat frame, the front end of the chair back connecting piece is hinged with a linkage frame through a fixed shaft assembly, the front end of the linkage frame is slidably connected with the front end of the chair seat frame in a certain range, a torsion spring is arranged on the fixed shaft assembly, one end of the torsion spring extends into the chair back connecting piece and is synchronously rotationally connected with the chair back connecting piece.

Description

Chair frame structure with linkage function

Technical Field

The utility model relates to the technical field of seats, in particular to a chair frame structure with a linkage function.

Background

In life, the use of chairs is indispensable, and nowadays, the types of chairs are more and more diversified, and along with the continuous development of technology, the comfort requirements of people on the chairs are also higher and higher. Most of existing chairs capable of adjusting the angle of the chair back only have an independent angle adjusting function of the chair back, and when the chair back is adjusted backwards, the chair is poor in comfort due to the fact that the position of the chair is unchanged, and the top legs of people can appear after sitting down.

In order to solve the technical problem, the Chinese patent application number 202220602212.7 discloses a rotary lifting chair chassis structure, which comprises a seat, wherein a backrest is arranged at the rear end position of the seat, a rotary waist pad is arranged on the backrest, armrests are arranged on two sides of the seat, a bottom shell is arranged at the bottom of the seat, casters are arranged at the bottom of the bottom shell, lifting adjusting pieces and locking adjusting pieces are arranged at the side of the seat, a movable adjusting block is arranged between the seat and the bottom shell, a backrest connecting frame is arranged at the connecting position of the bottom shell and the backrest, and a backrest connecting iron shaft is arranged between the backrest connecting frame and the bottom shell. In the scheme, although the problem that the front end of the chair leans upwards to prevent the top leg from occurring when the chair back leans back is realized, the problems of complex structure, multiple types of parts and high cost exist when the angle of the backrest is adjusted.

Disclosure of Invention

The utility model provides a chair frame structure with a linkage function, which aims to solve the problems of complex structure and high cost of the existing chair frame structure in the background technology.

The technical scheme of the utility model is realized as follows:

the utility model provides a chair frame structure with linkage function, includes back of the chair connecting piece, the upper end of back of the chair connecting piece articulates there is the seat frame, the front end of back of the chair connecting piece articulates there is the link frame through dead axle subassembly, the front end of link frame and the front end of seat frame sliding connection in a certain limit, install the torsional spring on the dead axle subassembly, the one end of torsional spring extends to back of the chair connecting piece inside and rotates with back of the chair connecting piece synchro, the other end of torsional spring extends to the link frame inside and rotates with the link frame synchro and be connected, when back of the chair connecting piece receives the exogenic action to rotate for the dead axle subassembly axis, the torsional spring can exert ascending effort to the link frame.

Preferably, the adjustable seat comprises a seat back connecting piece, and is characterized by further comprising a gear adjusting assembly for adjusting the rotation angle of the seat back connecting piece, wherein the gear adjusting assembly comprises a positioning frame sleeved on the fixed shaft assembly, the positioning frame is fixedly connected to the seat back connecting piece, one end of the positioning frame extends to the inside of the linkage frame, a plurality of positioning holes are formed in the end portion of the positioning frame along the vertical direction, a baffle capable of horizontally rotating is arranged in the linkage frame, and one end of the baffle can extend to the positioning holes in different positions so as to realize adjustment of the angle of the seat back connecting piece.

Preferably, the inside of linkage frame has outstanding first pin and spacing arch, the separation blade cover is established on first pin, the arc wall that uses first pin as the center has been seted up on the surface of separation blade, spacing protruding sliding connection is in the arc wall.

Preferably, the linkage frame is internally provided with a protruding second pin, one end of the baffle plate is provided with a third pin, and the second pin is connected with the third pin through a tension spring.

Preferably, the stopper of I shape structure is installed to the front position of linkage frame, the spout with stopper position assorted is seted up to the front end of seat support frame, stopper sliding connection at the spout.

Preferably, the fixed shaft assembly comprises a main shaft, a shaft sleeve is sleeved on the main shaft, locking nuts are connected to two ends of the main shaft, and the torsion spring is sleeved on the shaft sleeve.

Preferably, the front end of the chair back connecting piece is provided with a mounting groove, and the mounting groove is internally provided with a mounting hole and a threaded hole.

Preferably, the linkage frame is internally provided with a mounting channel for accommodating the contact end at one side of the torsion spring, and a pressing plate is arranged above the mounting channel.

Preferably, a dust cover is arranged above the linkage frame.

By adopting the technical scheme, the utility model has the beneficial effects that:

the chair has the advantages that the design structure is simple, when the back of the chair leans upward, the chair back connecting piece can drive the chair seat frame and the linkage frame to synchronously move, the chair seat frame is inclined under the action of the chair back connecting piece, the problem of top legs when a user sits on the chair is avoided, the back elevation angle of the chair back can be adjusted at different angles through the gear adjusting component, and the chair has the advantages of simple structure, convenience in operation, less number of parts and low cost.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a perspective view of the present utility model;

FIG. 2 is an exploded view of the present utility model;

FIG. 3 is an internal block diagram of the present utility model;

FIG. 4 is a mounting block diagram of the shift position adjusting assembly of the present utility model;

FIG. 5 is an exploded view of the shift position adjustment assembly of the present utility model;

FIG. 6 is a perspective view of a seatback connector of the present utility model;

FIG. 7 is a perspective view of a seat frame of the present utility model;

FIG. 8 is a perspective view of the linkage frame of the present utility model;

FIG. 9 is a perspective view of a baffle according to the present utility model;

FIG. 10 is an exploded view of the dead axle assembly of the present utility model;

fig. 11 is a use state diagram of the present utility model.

Wherein:

1. a chair back connecting piece; 101. a mounting groove; 102. a mounting hole; 103. a threaded hole; 2. a seat frame; 3. a dead axle assembly; 301. a main shaft; 302. a shaft sleeve; 303. a lock nut; 4. a torsion spring; 5. a linkage frame; 501. a first pin; 502. a limit protrusion; 503. a second pin; 504. a mounting channel; 6. a limiting block; 7. a gear adjustment assembly; 701. a positioning frame; 7011. positioning holes; 702. a baffle; 7021. an arc-shaped groove; 7022. a plug end; 7033. a driving end; 703. a fixing plate; 704. a third pin; 705. a tension spring; 8. a pressing plate; 9. a dust cover.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in the figure, the chair frame structure with the linkage function comprises a chair back connecting piece 1, wherein the front end of the chair back connecting piece 1 is provided with a mounting groove 101, the mounting groove 101 is internally provided with a mounting hole 102 and a threaded hole 103, wherein the rear end of the chair back connecting piece 1 is used for fixedly connecting the chair back, and when a user backs up, the chair back can drive the chair back connecting piece 1 to synchronously move; the mounting hole 102 is used for extending the contact end of one side of the torsion spring 4 into the mounting hole 102, and the threaded hole 103 is used for fixing the positioning frame 701 in the mounting groove 101.

The upper end of the chair back connecting piece 1 is hinged with a chair seat frame 2, and the chair seat frame 2 is rotatably arranged above the chair back connecting piece 1 by adopting a pin shaft, so that rotatable connection of the chair back connecting piece and the chair seat frame is realized.

The front end of the chair back connecting piece 1 is hinged with a linkage frame 5 through a fixed shaft assembly 3, the front end of the linkage frame 5 is slidably connected with the front end of the chair seat frame 2 in a certain range, specifically, a limiting block 6 with an I-shaped structure is arranged at the front position of the linkage frame 5, a chute matched with the position of the limiting block 6 is formed in the front end of the chair seat frame 2, the limiting block 6 is slidably connected with the chute, when the chair back connecting piece 1 drives the linkage frame 5 to move, the upper end of the linkage frame 5 can move relative to the chair seat frame 2 in a certain range, namely, the limiting block 6 moves in the chute, and when the limiting block 6 moves to a limit position, the front end of the chair seat frame 2 is driven to move upwards.

The fixed shaft assembly 3 is provided with a torsion spring 4, one end of the torsion spring 4 extends into the chair back connecting piece 1 and is in synchronous rotation connection with the chair back connecting piece 1, the other end of the torsion spring 4 extends into the linkage frame 5 and is in synchronous rotation connection with the linkage frame 5, and when the chair back connecting piece 1 rotates relative to the axis of the fixed shaft assembly 3 under the action of external force, the torsion spring 4 can apply upward acting force to the linkage frame 5; specifically, the inside of the linkage frame 5 is provided with a mounting channel 504 for accommodating the contact end at one side of the torsion spring 4, a pressing plate 8 is mounted above the mounting channel 504, the contact end of the torsion spring 4 extending to the inside of the linkage frame 5 is arranged at the mounting channel 504, and the contact end of the torsion spring 4 is limited by the pressing plate 8.

Specifically, the adjustable seat back mechanism further comprises a gear adjusting assembly 7 for adjusting the rotation angle of the seat back connecting piece 1, the gear adjusting assembly 7 comprises a positioning frame 701 sleeved on the fixed shaft assembly 3, the positioning frame 701 is fixedly connected to the seat back connecting piece 1, one end of the positioning frame 701 extends to the inside of the linkage frame 5, a plurality of positioning holes 7011 are formed in the end position along the vertical direction, a baffle 702 capable of horizontally rotating is arranged in the linkage frame 5, one end of the baffle 702 can extend into the positioning holes 7011 in different positions, so that the adjustment of the angle of the seat back connecting piece 1 is realized, one end of the baffle 702 close to the positioning frame 701 is a plug end 7022, when the plug end 7022 is inserted into different positioning holes 7011, the adjustment of the rotation angle of the seat back connecting piece 1 relative to the linkage frame 5 can be completed, and then the angle adjustment of the seat back is realized.

Specifically, the inside of the linkage frame 5 has a protruding first pin 501 and a limiting protrusion 502, the blocking piece 702 is sleeved on the first pin 501, an arc-shaped slot 7021 with the first pin 501 as the center is formed on the surface of the blocking piece 702, the limiting protrusion 502 is slidably connected in the arc-shaped slot 7021, that is, the blocking piece 702 can rotate around the center of the first pin 501, and in the rotating process, the limiting protrusion 502 is located in the arc-shaped slot 7021 of the blocking piece 702, so that the rotating stroke of the blocking piece 702 can be limited.

Specifically, the linkage frame 5 is internally provided with a protruding second pin 503, one end of the baffle plate 702 is provided with a third pin 704, the second pin 503 is connected with the third pin 704 through a tension spring 705, more specifically, one end of the baffle plate 702 provided with the third pin 704 is provided with a driving end 7033, under the action of the tension spring 705, the driving end 7033 of the baffle plate 702 can be pulled towards the direction of the tension spring 705 all the time, so that the driving end 7033 of the baffle plate 702 is always positioned in one of the positioning holes 7011; the fixed plate 703 limiting the up-and-down movement of the baffle 702 is arranged above the baffle 702, the fixed plate 703 is fixed inside the linkage frame 5 through bolts, in addition, a pull rope can be connected to the third pin 704, and when the pull rope is pulled, the baffle 702 can be rotated, so that the adjustment of the gear is realized.

Specifically, the fixed shaft assembly 3 includes a main shaft 301, a shaft sleeve 302 is sleeved on the main shaft 301, two ends of the main shaft 301 are connected with locking nuts 303, the torsion spring 4 is sleeved on the shaft sleeve 302, and the arrangement is to avoid abrasion of the main shaft 301 caused by direct contact of the torsion spring 4 with the main shaft 301, and in actual use, the center line of the main shaft 301 is always in a fixed state; the torsion spring 4 is provided to provide a resilient force when the backrest is restored.

Specifically, the dust cover 9 is installed above the linkage frame 5, which mainly plays a role in dust prevention and attractive appearance.

Working principle: when the chair frame structure with linkage function is used, as shown in fig. 11, the center line of the fixed shaft assembly 3 is in a fixed state, the chair back connecting piece 1 is mainly connected with the chair back, when a user sits and leans back, the chair back drives the chair back connecting piece 1 to move, under the action of the torsion spring 4, the front end of the driven linkage frame 5 moves upwards around the center of the fixed shaft assembly 3, so that the front end of the chair seat frame 2 is driven to move upwards, the whole chair seat frame 2 is in an inclined state, the problem of leg propping of the user is avoided, and the comfort during sitting is improved.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A chair frame structure with linkage function, its characterized in that: including back of the chair connecting piece (1), the upper end of back of the chair connecting piece (1) articulates there is seat frame (2), the front end of back of the chair connecting piece (1) articulates there is link frame (5) through dead axle subassembly (3), the front end of link frame (5) is connected in the sliding in certain limit with the front end of seat frame (2), install torsional spring (4) on dead axle subassembly (3), the one end of torsional spring (4) extends to back of the chair connecting piece (1) inside and with back of the chair connecting piece (1) synchronous rotation and be connected, the other end of torsional spring (4) extends to link frame (5) inside and with link frame (5) synchronous rotation and be connected, when back of the chair connecting piece (1) receives external force effect for dead axle subassembly (3) axis rotation, torsional spring (4) can apply ascending effort to link frame (5).

2. The chair frame structure with linkage function according to claim 1, wherein: still including being used for carrying out gear adjustment subassembly (7) of adjustment to back of the chair connecting piece (1) rotation angle, gear adjustment subassembly (7) are established locating rack (701) on dead axle subassembly (3) including the cover, locating rack (701) fixed connection is on back of the chair connecting piece (1), a plurality of locating holes (7011) have been seted up along vertical direction to inside and the tip position of locating rack (701) extension to link frame (5), are equipped with in link frame (5) inside can horizontal pivoted separation blade (702), in locating hole (7011) of different positions can be extended to the one end of separation blade (702) to realize back of the chair connecting piece (1) angle's adjustment.

3. A chair frame structure with linkage function according to claim 2, wherein: the inside of link frame (5) has outstanding first pin (501) and spacing arch (502), separation blade (702) cover is established on first pin (501), arc wall (7021) with first pin (501) as the center have been seted up on the surface of separation blade (702), spacing arch (502) sliding connection is in arc wall (7021).

4. A chair frame structure with linkage function according to claim 3, wherein: the linkage frame (5) is internally provided with a protruding second column pin (503), one end of the baffle piece (702) is provided with a third pin (704), and the second column pin (503) is connected with the third pin (704) through a tension spring (705).

5. The chair frame structure with linkage function according to claim 1, wherein: the limiting block (6) with the I-shaped structure is arranged at the front position of the linkage frame (5), a sliding groove matched with the position of the limiting block (6) is formed in the front end of the seat frame (2), and the limiting block (6) is connected to the sliding groove in a sliding mode.

6. The chair frame structure with linkage function according to claim 1, wherein: the fixed shaft assembly (3) comprises a main shaft (301), a shaft sleeve (302) is sleeved on the main shaft (301), locking nuts (303) are connected to two ends of the main shaft (301), and the torsion spring (4) is sleeved on the shaft sleeve (302).

7. The chair frame structure with linkage function according to claim 1, wherein: the front end of the chair back connecting piece (1) is provided with a mounting groove (101), and the mounting groove (101) is internally provided with a mounting hole (102) and a threaded hole (103).

8. The chair frame structure with linkage function according to claim 1, wherein: the inside of the linkage frame (5) is provided with an installation channel (504) for accommodating one side contact end of the torsion spring (4), and a pressing plate (8) is installed above the installation channel (504).

9. The chair frame structure with linkage function according to claim 1, wherein: a dust cover (9) is arranged above the linkage frame (5).