CN217610180U

CN217610180U - Back of chair subassembly and swivel chair

Info

Publication number: CN217610180U
Application number: CN202221577018.4U
Authority: CN
Inventors: 彭汉强; 彭伟鸿
Original assignee: Zhejiang Yueqiang Furniture Technology Co Ltd
Current assignee: Zhejiang Yueqiang Furniture Technology Co Ltd
Priority date: 2022-06-23
Filing date: 2022-06-23
Publication date: 2022-10-21
Anticipated expiration: 2032-06-23

Abstract

The utility model belongs to the technical field of the chair, especially, relate to a back of the chair subassembly and swivel chair. It has solved the defect such as prior art design is unreasonable. The chair back component comprises a cushion connecting arm; the lower end of the rear supporting piece is hinged to the upper end of the cushion connecting arm; the front upper backrest frame is positioned on the front side of the rear supporting piece; the upper end of the front upper backrest frame is hinged to the upper end of the rear supporting piece, and the lower end of the front upper backrest frame is connected to the front side surface of the upper end of the cushion connecting arm through an elastic part; the lower end of the front lower backrest frame is hinged to the front side of the cushion connecting arm, the hinged point is positioned below the elastic part, the upper end of the front lower backrest frame extends upwards to form a free shape, and the upper end of the front lower backrest frame is positioned on the front side of the lower end of the front upper backrest frame; and the angle adjusting and locking control mechanism is arranged between the lower end of the front lower backrest frame and the cushion connecting arm. This application advantage: and angle locking and self-adaptive passive adjustment are realized.

Description

Back of chair subassembly and swivel chair

Technical Field

The utility model belongs to the technical field of the chair, especially, relate to a back of the chair subassembly and swivel chair.

Background

The chair is a seat.

The chair comprises a swivel chair and a fixed traditional chair.

The structure of a chair generally includes legs, a seat cushion and a backrest. The backrest of the existing chair is generally a one-piece frame structure. One problem is that: the backrest can not be locked at the corresponding position after the angle adjustment, so that when different users use the chair, the backrest is always in the original position, and the practicability is poor. The second problem is that: the backrest frame is of an integral structure, and the middle supporting position of the backrest can not make the front and back position passive self-adaptive adjustment when the backrest is leaned against the corresponding position of the back of a human body. For example, chinese patent No. CN200920199178.8, a liftable swivel chair back support, including installing in swivel chair tray support frame rear portion and the back support that upwards extends, the tip is connecting block movable mounting in swivel chair tray support frame rear portion under the back support, two upwards extending branches are being fixed to the both sides of connecting block, the upper end arc of branch is connected, branch installation sliding block, the sliding block is equipped with the spout of horizontal direction, the spout is being installed and is having the sliding pin that has vertical through-hole, the one end of sliding pin inserts in the pinhole of branch, the lower part of sliding block is equipped with the button, the batter post on button upper portion is installed in the through-hole of sliding pin, the upper end of batter post is equipped with the upper frame that compression spring pushed against the sliding block, the sliding block is equipped with a plurality of back mounting holes. The swivel chair backrest bracket has the beneficial effects that the height between the backrest and the seat cushion and the front and back position state can be adjusted, so that the swivel chair backrest bracket is suitable for people with different physiques. And chinese patent No. CN200820047226.7 a backplate connecting piece and backrest combination connection structure, including the backplate, its characterized in that: the back board connecting piece is connected with the back board through the bolt in a threaded manner. The scheme has the advantages of simple and reasonable structure, rapid and convenient assembly, firmness and reliability, and can be applied to the connection between the back board and the seat of the swivel chair.

Although the above solutions have the advantages as described above, the above technical problems are not solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above problem, provide a back of the chair subassembly and combination that can solve above-mentioned technical problem.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

the chair back component comprises a cushion connecting arm;

the lower end of the rear supporting piece is hinged to the upper end of the cushion connecting arm;

the front upper backrest frame is positioned on the front side of the rear supporting piece; the upper end of the front upper backrest frame is hinged to the upper end of the rear supporting piece, and the lower end of the front upper backrest frame is connected to the front side surface of the upper end of the cushion connecting arm through an elastic part; the elastic part is in a block shape.

The lower end of the front lower backrest frame is hinged to the front side of the cushion connecting arm, the hinged point is positioned below the elastic part, the upper end of the front lower backrest frame extends upwards to form a free shape, and the upper end of the front lower backrest frame is positioned on the front side of the lower end of the front upper backrest frame;

the angle adjusting and locking control mechanism is arranged between the lower end of the front lower backrest frame and the cushion connecting arm; the angle adjustment locking control mechanism comprises a first concave-convex locking structure arranged at the lower end of the front lower backrest frame, a second concave-convex locking structure is arranged at the lower end of the cushion connecting arm, and the first concave-convex locking structure and the second concave-convex locking structure are matched.

In the chair back component, the elastic parts are distributed in a way that the elastic parts are inclined backwards from top to bottom.

In the above-mentioned back of the chair subassembly, the preceding side upper end of cushion linking arm is equipped with dodges the hole, the elastic component stretches into according to the incline direction dodge the hole.

In the above chair back assembly, the avoiding hole is a blind hole, the lower end rear side face of the elastic part is provided with a convex block inserted into the avoiding hole, the elastic part is provided with a bolt penetrating through the convex block in a penetrating manner, and the bolt is in threaded connection with a threaded hole at the bottom of the avoiding hole.

In the above chair back assembly, the first concave-convex locking structure comprises a rear convex seat arranged at the rear side of the lower end of the front lower back frame, and a plurality of first locking teeth distributed in a fan shape are arranged laterally on the rear convex seat; the second concave-convex locking structure comprises a left swinging block and a right swinging block, a plurality of second locking teeth distributed in a fan shape are arranged on the inner side surface of the left swinging block and the right swinging block, and the first locking teeth and the second locking teeth are meshed with each other.

In foretell back of the chair subassembly, the leading flank of cushion linking arm is equipped with and holds the blind hole, the back convex seat in place hold in the blind hole the lateral surface of cushion linking arm be equipped with hold the side direction through-hole of blind hole intercommunication, the left and right sides swing piece in place the side direction through-hole in.

In the chair back component, the left and right swinging blocks are connected to the control handle, and the control handle is hinged to the cushion connecting arm.

In foretell back of the chair subassembly, the back cam rear side is equipped with and dodges the groove the horizontal running through of back cam has the hinge, the hinge both ends stretch into respectively in the hinge hole on the cushion linking arm the cover is equipped with and is located on the hinge dodge in the groove and act on respectively dodge the groove tank bottom and hold the torsional spring at the bottom of the blind hole the left and right sides of back cam is equipped with arc orbit hole respectively, it has the spacing axle of orbit to run through in the arc orbit hole the pore wall that holds the blind hole is equipped with the confession the shaft hole that the spacing axle both ends of orbit stretched into one by one.

In the chair back assembly, a distance is reserved between the convex block and the bottom of the avoidance hole.

The present application further provides a swivel chair having the chair back assembly.

Compared with the prior art, the application has the advantages that:

when the back of a person leans against the upper front backrest frame and the lower front backrest frame, the upper side of the lower front backrest frame is free, and the elastic part designed on the lower side of the upper front backrest frame enables the back to lean against the upper front backrest frame, the relative position of the upper front backrest frame and the lower front backrest frame can be adjusted in a self-adaptive and passive mode, and the comfort of the back leaning against the upper front backrest frame is greatly improved.

The angle adjustment locking control mechanism is used for locking a corresponding angle after the angle of the front lower back rest frame is adjusted so as to be suitable for different crowds, and the upper side of the front lower back rest frame is in a free shape and can meet the use requirement that the back is elastically propped against.

Drawings

Fig. 1 is a schematic perspective view of a chair back assembly provided by the present invention.

Fig. 2 is a schematic side view of the chair back assembly provided by the present invention.

Fig. 3 is a schematic view of the front structure of the chair back assembly provided by the present invention.

Fig. 4 isbase:Sub>A schematic sectional view taken along linebase:Sub>A-base:Sub>A in fig. 3.

Fig. 5 is an exploded view of the backrest module according to the present invention.

Fig. 6 is a schematic view of the cushion connecting arm structure provided by the present invention.

Fig. 7 is a schematic structural view of the front lower back frame provided by the present invention.

Fig. 8 is a schematic view of the swivel chair structure provided by the present invention.

In the figure, the cushion connecting arm 1, the avoiding hole 10, the accommodating blind hole 11, the front convex anti-falling part 110, the lateral through hole 12, the shaft hole 13, the rear supporting piece 2, the front upper back frame 3, the elastic part 4, the convex block 40, the bolt 41, the front lower back frame 5, the angle adjusting locking control mechanism 6, the first concave-convex locking structure 60, the rear convex seat 600, the first locking tooth 601, the avoiding groove 602, the hinge shaft 603, the torsion spring 604, the arc-shaped track hole 605, the track limiting shaft 606, the second concave-convex locking structure 61, the left and right swinging block 610, the second locking tooth 611, the control handle 612, the cushion 7 and the chair foot 8.

Detailed Description

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

Example one

As shown in fig. 1 to 3, the chair back assembly includes a seat-cushion connecting arm 1, a rear support 2, a front upper back-rest frame 3, a front lower back-rest frame 5, and an angle-adjusting locking control mechanism 6.

The lower extreme of cushion linking arm 1 is connected in the cushion, and the upper end of cushion linking arm 1 is the freedom form.

The lower end of the rear supporting piece 2 is hinged to the upper end of the cushion connecting arm 1 through a first transverse hinged shaft. The rear support 2 is V-shaped, but may of course also be H-shaped.

The front upper backrest frame 3 is positioned on the front side of the rear supporting piece 2; the upper end of the front upper backrest frame 3 is hinged with the upper end of the rear supporting piece 2 through a second transverse hinged shaft, and the lower end of the front upper backrest frame 3 is connected with the front side surface of the upper end of the cushion connecting arm 1 through an elastic part 4. The front upper back frame 3 and the elastic portion 4 are integrally injection molded.

As shown in fig. 4 to 5, the rear side surface of the elastic portion 4 and the hinge point of the front upper back frame 3 and the seat cushion connecting arm 1 are in contact, and when the back portion is pushed in, the elastic portion 4 is passively deformed in the thickness direction.

When the back leans against the upper front backrest frame 3, the elastic part 4 deforms at the moment, so that the contact surface between the back and the upper front backrest frame 3 can be passively adjusted, and the comfort of the back leaning against the upper front backrest frame 3 is greatly improved.

When the person leaves the front upper backrest frame 3, the elastic part 4 automatically resets.

The elastic portion 4 functions like a seesaw.

The lower end of the front lower backrest frame 5 is hinged with the front side of the cushion connecting arm 1, the hinged point is positioned below the elastic part 4, the upper end of the front lower backrest frame 5 extends upwards to be free, and the upper end of the front lower backrest frame 5 is positioned on the front side of the lower end of the front upper backrest frame 3.

Preferably, as shown in fig. 4-7, the elastic portion 4 of the present embodiment is distributed from top to bottom in a backward inclined manner. An avoiding hole 10 is formed in the upper end of the front side edge of the cushion connecting arm 1, and the elastic part 4 extends into the avoiding hole 10 in the inclined direction. Secondly, the avoiding hole 10 is a blind hole, the rear side face of the lower end of the elastic part 4 is provided with a convex block 40 inserted into the avoiding hole 10, a bolt 41 penetrating through the convex block 40 is arranged on the elastic part 4 in a penetrating mode, and the bolt 41 is in threaded connection with a threaded hole at the bottom of the avoiding hole 10.

The rear side of the bump 40 is spaced from the bottom of the relief hole 10.

The inclined distribution of the elastic part 4 enables the lower side of the front upper back frame 3 to be reset to one side of the human body, so that the front upper back frame 3 is actively reset after the passive position is changed.

The design of the projection 40, the bolt 41 and the avoiding hole 10 enables the two ends of the elastic part 4 to be restrained, and the reliability of elastic deformation is ensured.

Secondly, the avoiding hole 10 prevents interference caused by the projection 40 protruding out of the front surface of the cushion connecting arm 1

As shown in fig. 4-7, the angle-adjusting locking control mechanism 6 is arranged between the lower end of the front lower back-rest frame 5 and the cushion connecting arm 1, and the angle-adjusting locking control mechanism 6 is used for locking the corresponding angle of the front lower back-rest frame 5 after angle adjustment, so as to be suitable for different people; the angle adjustment locking control mechanism 6 comprises a first concave-convex locking structure 60 arranged at the lower end of the front lower backrest frame 5, a second concave-convex locking structure 61 is arranged at the lower end of the cushion connecting arm 1, and the first concave-convex locking structure 60 is matched with the second concave-convex locking structure 61.

The upper side of the front lower backrest frame 5 is in a free shape, which can meet the use requirement of elastically propping against the waist.

Specifically, the first concave-convex locking structure 60 of the present embodiment includes a rear boss 600 disposed at the rear side of the lower end of the front lower back frame 5, and a plurality of first locking teeth 601 distributed in a fan shape are disposed laterally on the rear boss 600; the second concave-convex locking structure 61 comprises a left swinging block 610 and a right swinging block 610, wherein a plurality of second locking teeth 611 distributed in a fan shape are arranged on the inner side surface of the left swinging block 610, and the first locking teeth 601 and the second locking teeth 611 are meshed with each other. Preferably, the total number of the first locking teeth 601 is greater than the total number of the second locking teeth 611, so as to reduce the thickness of the seat cushion connecting arm 1 in the front-rear direction. Secondly, the front side surface of the cushion connecting arm 1 is provided with a blind accommodating hole 11, the rear convex seat 600 is arranged in the blind accommodating hole 11, the lateral surface of the cushion connecting arm 1 is provided with a lateral through hole 12 communicated with the blind accommodating hole 11, and the left-right swinging block 610 is arranged in the lateral through hole 12. The built-in causes the second locking tooth 611 of the left and right swing block 610 and the first locking tooth 601 of the rear boss 600 to form a shield against deposition of dust and the like.

In addition, for the convenience of manipulation, the left and right swinging block 610 is connected to a control handle 612, and the control handle 612 and the cushion connecting arm 1 are hingedly connected by a fourth hinge shaft. A torsion spring is sleeved on the fourth hinge shaft so that the first locking teeth 601 and the second locking teeth 611 are always engaged together in a locking state.

As shown in fig. 4-7, in order to stably hinge the front lower backrest frame to the cushion connecting arm 1, an avoiding groove 602 is provided at the rear side of the rear boss 600, a hinge shaft 603 penetrates through the rear boss 600 in the transverse direction, two ends of the hinge shaft 603 respectively extend into hinge shaft holes on the cushion connecting arm 1, a torsion spring 604 which is positioned in the avoiding groove 602 and respectively acts on the bottom of the avoiding groove 602 and the bottom of the accommodating blind hole 11 is sleeved on the hinge shaft 603, arc-shaped track holes 605 are respectively provided at the left and right sides of the rear boss 600, a track limiting shaft 606 penetrates through the arc-shaped track holes 605, the track limiting shaft 606 relatively moves in the arc-shaped track holes 605 to play a guiding role, and shaft holes 13 for two ends of the track limiting shaft 606 to extend into one by one are provided on the hole wall of the accommodating blind hole 11.

The middle part of the torsion spring 604 is provided with a middle elastic arm, the two ends of the torsion spring 604 are provided with end elastic arms, the middle elastic arm acts on the bottom of the accommodating blind hole 11, and the two end elastic arms act on the bottom of the avoiding groove 602.

Next, a front protrusion retaining portion 110 is provided at the bottom of the accommodating blind hole 11, and the middle elastic arm acts on the front protrusion retaining portion 110.

The working principle of the embodiment is as follows:

when the angle of the front lower back frame needs to be adjusted, the control handle 612 is held to enable the second locking tooth 611 on the left and right swinging block 610 to be separated from the first locking tooth 601 at the lateral side of the rear boss 600, at this time, the angle of the front lower back frame can be adjusted to a required angle, and then the control handle 612 is reset to enable the second locking tooth 611 to be meshed with the first locking tooth 601 again.

When the back of a person leans against the upper front backrest frame 3 and the lower front backrest frame 5, the upper side of the lower front backrest frame 5 is free, and the elastic part 4 designed at the lower side of the upper front backrest frame 3 enables the back to be attached, the relative position of the upper front backrest frame 3 and the lower front backrest frame 5 can be adaptively and passively adjusted.

Example two

As shown in fig. 8, the present embodiment provides a swivel chair having the chair back assembly of the first embodiment. The chair back component is arranged on the seat cushion 7, and the seat cushion 7 is arranged on the chair legs 8.

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. Back of the chair subassembly, including cushion linking arm (1), its characterized in that, back of the chair subassembly still include:

the lower end of the rear supporting piece (2) is hinged to the upper end of the cushion connecting arm (1);

a front upper backrest frame (3) positioned on the front side of the rear support (2); the upper end of the front upper backrest frame (3) is hinged to the upper end of the rear supporting piece (2), and the lower end of the front upper backrest frame (3) is connected to the front side surface of the upper end of the cushion connecting arm (1) through an elastic part (4);

the lower end of the front lower backrest frame (5) is hinged to the front side of the seat cushion connecting arm (1), the hinged point is positioned below the elastic part (4), the upper end of the front lower backrest frame (5) extends upwards to form a free shape, and the upper end of the front lower backrest frame (5) is positioned on the front side of the lower end of the front upper backrest frame (3);

and the angle adjusting and locking control mechanism (6) is arranged between the lower end of the front lower backrest frame (5) and the cushion connecting arm (1).

2. The assembly of claim 1, wherein the resilient portion (4) is inclined rearwardly from top to bottom.

3. The chair back assembly according to claim 1 or 2, wherein an avoidance hole (10) is formed in the upper end of the front side edge of the cushion connecting arm (1), and the elastic part (4) extends into the avoidance hole (10) in an inclined direction.

4. The chair back assembly according to claim 3, wherein the avoiding hole (10) is a blind hole, a protruding block (40) inserted into the avoiding hole (10) is arranged on the rear side face of the lower end of the elastic portion (4), a bolt (41) penetrating through the protruding block (40) is arranged on the elastic portion (4) in a penetrating mode, and the bolt (41) is in threaded connection with a threaded hole at the bottom of the avoiding hole (10).

5. The seat back assembly according to claim 1, wherein the angle-adjustment locking control mechanism (6) comprises a first male-female locking structure (60) provided at the lower end of the front lower back frame (5), and a second male-female locking structure (61) provided at the lower end of the seat cushion connecting arm (1), wherein the first male-female locking structure (60) and the second male-female locking structure (61) are engaged with each other.

6. The chair back assembly according to claim 5, wherein the first concavo-convex locking structure (60) comprises a rear boss (600) provided at a rear side of a lower end of the front lower back frame (5), and a plurality of first locking teeth (601) distributed in a fan shape are provided at a lateral side of the rear boss (600); the second concave-convex locking structure (61) comprises a left swinging block (610) and a right swinging block (610), a plurality of second locking teeth (611) distributed in a fan shape are arranged on the inner side face of the left swinging block (610) and the inner side face of the right swinging block (610), and the first locking teeth (601) are meshed with the second locking teeth (611).

7. The chair back assembly according to claim 6, wherein the front side surface of the seat cushion connecting arm (1) is provided with a blind accommodating hole (11), the rear convex seat (600) is arranged in the blind accommodating hole (11), a lateral through hole (12) communicated with the blind accommodating hole (11) is arranged on the lateral surface of the seat cushion connecting arm (1), and the left and right swinging block (610) is arranged in the lateral through hole (12).

8. The seat back assembly of claim 7, wherein the side-to-side swinging block (610) is connected to a control handle (612), and the control handle (612) is hingedly connected to the seat cushion connecting arm (1).

9. The chair back component of claim 8, wherein an avoiding groove (602) is formed in the rear side of the rear boss (600), a hinge shaft (603) penetrates through the rear boss (600) in the transverse direction, two ends of the hinge shaft (603) extend into hinge shaft holes in the cushion connecting arm (1), a torsion spring (604) is sleeved on the hinge shaft (603) and located in the avoiding groove (602) and acts on the groove bottom of the avoiding groove (602) and the hole bottom of the accommodating blind hole (11), arc-shaped track holes (605) are formed in the left side and the right side of the rear boss (600), track limiting shafts (606) penetrate through the arc-shaped track holes (605), and shaft holes (13) for the two ends of the track limiting shafts (606) to extend into are formed in the hole wall of the accommodating blind hole (11).

10. A swivel chair having a chair back assembly as claimed in any one of claims 1 to 9.