CN210727258U

CN210727258U - Backrest inclination angle adjusting mechanism for office chair

Info

Publication number: CN210727258U
Application number: CN201922021956.0U
Authority: CN
Inventors: 辛艺; 赵吉强; 苟华刚
Original assignee: Chongqing Yanfeng Adient Automotive Components Co Ltd
Current assignee: Chongqing Adient Automotive Components Co Ltd
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-06-12
Anticipated expiration: 2029-11-20

Abstract

The utility model discloses a back inclination adjustment mechanism for office chair, install the back on the bedplate including bedplate and rotation, the both sides of bedplate are equipped with the supporter, the upper end of supporter is equipped with armrest assembly, this armrest assembly include with supporter upper end normal running fit's handrail seat to and with handrail seat sliding fit's sliding part, install on the handrail seat and be used for restricting the gliding locking part of sliding part, the sliding part rear end is rotated and is connected on the back, install elasticity retaining element between bedplate and the back, it can be applyed towards the back and keep away from toppling over direction pivoted power. The utility model has the advantages that: not only can convenience of customers adjust, the atress of locking structure is reliable moreover, is difficult for damaging, can prolong seat life.

Description

Backrest inclination angle adjusting mechanism for office chair

Technical Field

The utility model relates to an adjusting device for seat, concretely relates to back inclination adjustment mechanism for official working seat.

Background

The office chair is office furniture, and for office workers, most of the working days are occupied by the office chair, and the office chair with reasonable structural design and good comfort has positive significance for relieving fatigue of long-time sitting.

In the product design of the existing office chair, a plurality of chairs with backrest adjusting function have appeared, and the adjusting mechanism is generally as follows: the backrest is rotatably installed at the rear end of the seat frame, and the adjusting device is installed at the switching position of the backrest and the seat frame to control the inclination angle of the backrest.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a back inclination adjustment mechanism for official working seat not only can convenience of customers adjusts, and locking structure's atress is reliable moreover, is difficult for damaging, can prolong seat life.

In order to achieve the above purpose, the utility model discloses technical scheme as follows:

a back inclination adjustment mechanism for an office chair, comprising a seat plate and a back rotatably mounted on the seat plate, which is characterized in that: the both sides of bedplate are equipped with the supporter, the upper end of supporter is equipped with handrail assembly, this handrail assembly include with supporter upper end normal running fit's handrail seat to and with handrail seat sliding fit's sliding part, install on the handrail seat and be used for restricting the gliding locking part of sliding part, the sliding part rear end rotates to be connected on the back, install elasticity retaining element between bedplate and the back.

By adopting the structure, all the parts of the backrest inclination angle adjusting mechanism are relatively fixed when the locking part is in a locking state, so that the backrest can not rotate relative to the seat plate, and a user can conveniently lean against the chair back of the chair; after the locking part is unlocked, a user pushes the backrest to rotate backwards by using the force of the back, so that the inclination angle of the backrest is adjusted; meanwhile, in the unlocking state, the back of the user does not apply thrust, and the backrest can automatically reset under the action of the elastic holding element. The locking component is arranged on the handrail, and can be operated by a user conveniently.

Preferably, the method comprises the following steps: the middle part of the armrest seat is hinged with the upper end of the support body, a sliding groove extending along the length direction of the armrest seat is arranged on the lower side of the armrest seat, and the sliding part is slidably mounted in the sliding groove. By adopting the structure, the seat is convenient to assemble.

Preferably, the method comprises the following steps: the upper side of the sliding component is distributed with lower locking teeth, the locking component is rotatably arranged on the armrest seat, one end of the locking component is provided with an operating lug, the other end of the locking component is provided with upper locking teeth matched with the lower locking teeth, the upper locking teeth are meshed with the lower locking teeth in a locking state of the sliding component, the operating lug is pressed, the locking component rotates, the upper locking teeth are separated from the lower locking teeth, and the sliding component is unlocked. By adopting the structure, the pressing operation lug drives the locking component to rotate, so that the upper locking teeth can be separated from the lower locking teeth on the sliding component, and the unlocking is finished.

Preferably, the method comprises the following steps: the handrail seat is provided with a strip-shaped groove, the locking part is rotatably arranged on the side wall of the strip-shaped groove, and the mounting position of the locking part is close to the upper locking tooth. By adopting the structure, the locking component can be conveniently installed, and the operating lug can be exposed, so that the unlocking by a user is facilitated.

Preferably, the method comprises the following steps: the back seat is characterized in that a lower connecting plate is arranged at the rear end of the seat plate, an upper connecting plate is arranged at the lower end of the backrest, and the upper connecting plate is hinged with the lower connecting plate.

Preferably, the method comprises the following steps: the lower connecting plate is disposed obliquely with respect to the horizontal plane of the seat plate, and the upper connecting plate extends downward from the rear side of the backrest. By adopting the structure, the space layout is reasonable, the assembly is facilitated, the movement interference of parts can not be caused, and the movement reliability of the mechanism is ensured.

Preferably, the method comprises the following steps: the elastic holding element is a torsion spring, a torsion spring supporting pin is arranged at the hinged position of the upper connecting plate and the lower connecting plate, an upper positioning column is arranged on the upper connecting plate, a lower positioning column is arranged on the lower connecting plate, the torsion spring is sleeved on the torsion spring supporting pin, and two ends of the torsion spring are respectively abutted to the upper positioning column and the lower positioning column. By adopting the structure, the torsion spring can be conveniently installed.

Preferably, the method comprises the following steps: the supporting body extends upwards from two sides of the seat board, a lower hinged seat is arranged at the top end of the supporting body, and an upper hinged seat matched with the lower hinged seat is arranged in the middle of the lower side of the armrest seat. By adopting the structure, the armrest seat is convenient to assemble.

Preferably, the method comprises the following steps: the both sides of back are equipped with the rotation installation department, the sliding component rear end is equipped with tilt up's connecting portion, and this connecting portion articulate on the rotation installation department. By adopting the structure, the sliding component is convenient to assemble.

Compared with the prior art, the beneficial effects of the utility model are that:

adopt the utility model provides a back inclination adjustment mechanism for official working seat, locking part set up on the handrail, can be convenient for user's unblock operation, and the atress position of locking also is in on the handrail, can prolong the resistance arm for locking structure's atress is more reliable, and spare part is difficult for bad damage, can play extension seat life's effect.

Drawings

FIG. 1 is an office chair with an adjusting mechanism according to the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at I;

FIG. 3 is a schematic view of the armrest assembly;

fig. 4 is a cross-sectional view of the armrest assembly.

Detailed Description

The present invention will be further described with reference to the following examples and accompanying drawings.

The front, rear, left, and right directions mentioned in the present embodiment are based on the front, rear, left, and right directions of the seat itself.

As shown in fig. 1 and 4, a backrest tilt angle adjusting mechanism for an office chair, the office chair main body structure comprises a seat plate 1, a backrest 2 and an armrest assembly 4, wherein the lower end of the backrest 2 is rotatably mounted at the rear end of the seat plate 1, two sides of the seat plate 1 are symmetrically provided with upwardly extending support bodies 3, the armrest assembly 4 is composed of an armrest seat 4a and a sliding component 4b slidably arranged in the armrest seat 4a, wherein the middle part of the armrest seat 4a is rotatably mounted at the upper end of the support body 3, the rear end of the sliding component 4b is rotatably connected to the backrest 2, the armrest seat 4a is further provided with a locking component 4c for limiting the sliding component 4b to slide, the upper side of the sliding component 4b is distributed with lower locking teeth 4b1, the locking component 4c is in a rod-shaped structure and rotatably mounted on the armrest seat 4a, the front end of the locking component 4c is provided with an operating projection 4, the rear end is provided with an upper locking tooth 4c2 corresponding to the lower locking tooth 4b1, and the elastic retaining element 5 is installed at the position where the seat plate 1 is rotatably connected with the backrest 2, wherein the elastic retaining element 5 is preferably a torsion spring in the embodiment.

When the user unlocks, the manual pressing operation lug 4c1 drives the locking part 4c to rotate around the pivot a, so that the upper locking tooth 4c2 is separated from the lower locking tooth 4b1 to unlock the backrest, and then the user pushes the backrest 2 to rotate backwards by using the back force to complete the adjustment of the inclination angle of the backrest. After the inclination adjustment of the backrest is completed, the upper locking tooth 4c2 rotates downward around the fulcrum a after the user's hand leaves the operating protrusion 4c1, and the upper locking tooth 4c2 engages with the lower locking tooth 4b1 to lock the backrest 2 at the angle, wherein it should be specifically mentioned that a spring may be provided at the fulcrum a to automatically return the upper locking tooth 4c2 after the user's hand leaves the operating protrusion 4c 1. Of course, it is also possible to automatically reset by the gravity of the upper locking tooth 4c 2. Meanwhile, when the upper locking tooth 4c2 and the lower locking tooth 4b1 are separated, the back support 2 can be automatically reset under the action of the elastic holding element 5 without applying pushing force on the back of the user.

Locking part 4c sets up on the handrail, and not only user unblock convenient operation locks the stress point moreover and also lies in the handrail, compares traditional angle modulation unlocking structure, has prolonged the resistance arm under the locking state for locking structure's atress is more reliable, and spare part is also difficult damaged, can play the effect of extension seat life.

As shown in fig. 1 and 3, in order to facilitate the assembly of the armrest assembly 4, the top end of the support body 3 is provided with a lower hinged seat 3a, the middle of the lower side of the armrest seat 4a is provided with an upper hinged seat 4a3 corresponding to the lower hinged seat 3a, and the upper hinged seat 4a3 is rotatably mounted on the lower hinged seat 3 a; the lower side of the armrest seat 4a is also provided with a sliding groove 4a1 extending along the length direction, a sliding component 4b is slidably mounted in the sliding groove 4a1, two sides of the backrest 2 are provided with rotating mounting parts 2c, the rear end of the sliding component 4b is provided with a connecting part 4b2 inclining upwards, the connecting part 4b2 is hinged on the rotating mounting parts 2c, and the connecting part 4b2 is obliquely arranged, so that the assembly requirement can be met, and the mechanism movement interference can be prevented.

As shown in fig. 4, to facilitate the assembly of the locking member 4c, a strip-shaped groove 4a2 is formed on the armrest seat 4a, the locking member 4c is rotatably mounted on a side wall of the strip-shaped groove 4a2 at a position of a pivot point a, and after the locking member 4c is assembled, the operating protrusion 4c1 is exposed on the upper surface of the armrest seat 4a to facilitate the unlocking operation of the user.

As shown in fig. 2, in order to meet the requirement of spatial layout and prevent the mechanism from moving and interfering, the rear end of the seat plate 1 is provided with a lower connecting plate 1a, the lower connecting plate 1a is arranged obliquely relative to the horizontal plane of the seat plate 1, the lower end of the backrest 2 is provided with an upper connecting plate 2a, the upper connecting plate 2a extends downwards from the rear side of the backrest 2, the upper connecting plate 2a is hinged to the lower connecting plate 1a through a torsion spring support pin 6, the upper connecting plate 2a is further provided with an upper positioning column 2b, the lower connecting plate 1a is further provided with a lower positioning column 1b, the torsion spring is sleeved on the torsion spring support pin 6, and the two ends of the torsion spring are respectively abutted to the upper positioning column 2b and the lower positioning column 1b, and.

The sliding part 4b may also take the form of a rack directly, the teeth of which form the aforementioned lower locking teeth 4b 1.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and the scope of the present invention.

Claims

1. A back inclination adjustment mechanism for an office chair, comprising a seat plate (1) and a back (2) rotatably mounted on the seat plate (1), characterized in that: the both sides of bedplate (1) are equipped with supporter (3), the upper end of supporter (3) is equipped with handrail assembly (4), this handrail assembly (4) including with supporter (3) upper end normal running fit's handrail seat (4a) to and with handrail seat (4a) sliding part (4b) sliding fit, install on handrail seat (4a) and be used for restricting gliding locking part (4c) of sliding part (4b), sliding part (4b) rear end rotates to be connected on back (2), install elasticity holding element (5) between bedplate (1) and back (2).

2. A back rest tilt angle adjusting mechanism for an office chair according to claim 1, wherein: the middle part of the armrest seat (4a) is hinged with the upper end of the support body (3), a sliding groove (4a1) extending along the length direction of the armrest seat is arranged on the lower side of the armrest seat (4a), and the sliding part (4b) is installed in the sliding groove (4a1) in a sliding mode.

3. A back rest tilt angle adjusting mechanism for an office chair according to claim 2, wherein: lower locking teeth (4b1) are distributed on the upper side of the sliding component (4b), the locking component (4c) is rotatably installed on the armrest seat (4a), one end of the locking component (4c) is provided with an operating lug (4c1), the other end of the locking component is provided with upper locking teeth (4c2) matched with the lower locking teeth (4b1), the upper locking teeth (4c2) are meshed with the lower locking teeth (4b1) in the locking state of the sliding component (4b), the operating lug (4c1) is pressed, the locking component (4c) rotates, the upper locking teeth (4c2) are separated from the lower locking teeth (4b1), and the sliding component (4b) is unlocked.

4. A back rest tilt angle adjusting mechanism for an office chair according to claim 3, wherein: a strip-shaped groove (4a2) is arranged on the armrest seat (4a), the locking component (4c) is rotatably arranged on the side wall of the strip-shaped groove (4a2), and the installation position of the locking component is close to the upper locking tooth (4e 2).

5. A back rest tilt angle adjusting mechanism for an office chair according to claim 1, 2, 3 or 4, wherein: the chair is characterized in that a lower connecting plate (1a) is arranged at the rear end of the seat plate (1), an upper connecting plate (2a) is arranged at the lower end of the backrest (2), and the upper connecting plate (2a) is hinged to the lower connecting plate (1 a).

6. The back rest tilt angle adjustment mechanism for an office chair according to claim 5, wherein: elasticity keeps component (5) to be the torsional spring, upper junction plate (2a) and lower connecting plate (1a) articulated position are equipped with torsional spring supporting pin (6), are equipped with on upper junction plate (2a) reference column (2b), are equipped with down reference column (1b) on lower connecting plate (1a), and the torsional spring suit is on torsional spring supporting pin (6), and the both ends of torsional spring butt respectively on upper reference column (2b) and lower reference column (1 b).

7. The back rest tilt angle adjustment mechanism for an office chair according to claim 5, wherein: the lower connecting plate (1a) is arranged obliquely relative to the horizontal plane of the seat plate (1), and the upper connecting plate (2a) extends downwards from the rear side of the backrest (2).

8. A back rest tilt angle adjusting mechanism for an office chair according to claim 1, 2, 3 or 4, wherein: the supporting body (3) extends upwards from two sides of the seat board (1) and is provided with a lower hinged seat (3a) at the top end, and the middle part of the lower side of the armrest seat (4a) is provided with an upper hinged seat (4a3) matched with the lower hinged seat (3 a).

9. A back rest tilt angle adjusting mechanism for an office chair according to claim 1, 2, 3 or 4, wherein: the both sides of back (2) are equipped with rotation installation department (2c), sliding member (4b) rear end is equipped with tilt up's connecting portion (4b2), and this connecting portion (4b2) articulates on rotation installation department (2 c).