CN115227059A - Back of chair subassembly and swivel chair of adjustable back of body and back of body - Google Patents

Abstract

The invention belongs to the technical field of chairs, and particularly relates to a chair back assembly capable of adjusting a lower back and an upper back and a swivel chair. It has solved prior art design defect such as unreasonable. The chair back component capable of adjusting the lower back and the upper back 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 block; 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 block, 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. The application has the advantages that: and angle locking and self-adaptive passive adjustment are realized.

Description

Back of chair subassembly and swivel chair of back of a body and adjustable back of a body

Technical Field

The invention belongs to the technical field of chairs, and particularly relates to a chair back assembly capable of adjusting a lower back and an upper back and a 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 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 branches that upwards extend 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 sliding pin that has vertical through-hole is being installed to the spout, 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 is pushing 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 backboard connector and backrest combination connection structure, including a backrest board, 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.

Disclosure of Invention

The present invention is directed to solve the above problems, and an object of the present invention is to provide a chair back assembly and a combination thereof capable of adjusting a lower back and an upper back.

In order to achieve the purpose, the invention adopts the following technical scheme:

the chair back component capable of adjusting the lower back and the upper back 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 block;

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 block, 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 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 with the adjustable lower back and the adjustable upper back, the elastic blocks are distributed in a way of inclining backwards from top to bottom.

In the back of the chair subassembly of foretell adjustable back of the body and back of the body, the preceding side upper end of cushion linking arm is equipped with dodges the hole, the elastic block stretches into according to the incline direction dodge the hole.

In the back of the chair subassembly of foretell adjustable back of the body and back of the body, dodge the hole for the blind hole, the lower extreme trailing flank of elasticity piece be equipped with insert in dodge the lug in the hole wear to be equipped with on the elasticity piece to run through the bolt of lug, the bolt with dodge the screw hole threaded connection at the hole bottom of the hole.

In the above seat back assembly with adjustable lower back and upper back, the first concave-convex locking structure includes 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 the back of the chair subassembly of foretell adjustable back and back of body, 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 the side direction through-hole that holds the blind hole intercommunication, the swing piece about place in the side direction through-hole in.

In the chair back assembly with the adjustable lower back and the adjustable upper back, the left-right swinging block is connected to the control handle, and the control handle is hinged to the cushion connecting arm.

In the back of the chair subassembly of the back of the body and last back under foretell adjustable, back cam rear side is equipped with and dodges the groove back cam transversely run through there is 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 above-mentioned back of the chair subassembly of adjustable back and upper back, the lug leaves the interval with the hole bottom of dodging the hole.

The present application further provides a swivel chair having the adjustable back-rest assembly of the lower back and the upper back.

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

when the back of a person leans against the front upper backrest frame and the front lower backrest frame, the upper side of the front lower backrest frame is free, and the elastic block designed on the lower side of the front upper backrest frame enables the back to lean against the upper backrest frame, the relative position of the front upper backrest frame and the front lower backrest frame can be adjusted in a self-adaptive and passive mode, and the comfort of the back leaning against the front upper 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 perspective view of a chair back assembly with adjustable lower and upper back according to the present invention.

FIG. 2 is a side view of the backrest assembly of the present invention with adjustable lower and upper back.

FIG. 3 is a schematic front view of the chair back assembly with adjustable lower and upper back.

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

Figure 5 is a schematic view of an exploded view of the adjustable lower and upper back chair back assembly of the present invention.

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

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

Fig. 8 is a schematic view of the structure of the swivel chair provided by the 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 block 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 are further described with reference to the drawings, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1 to 3, the chair back assembly for adjusting the lower back and the upper back comprises a cushion connecting arm 1, a rear supporting piece 2, a front upper back frame 3, a front lower back 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 block 4. The front upper backrest frame 3 and the elastic block 4 are integrally formed by injection molding.

As shown in fig. 4-5, the back side of the elastic block 4 contacts with the hinge point of the front upper back frame 3 and the cushion connecting arm 1, and when the back is pushed in, the elastic block 4 is passively deformed in the thickness direction.

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

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

The elastic block 4 acts like an elastic 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 block 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 blocks 4 of the present embodiment are 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 block 4 extends into the avoiding hole 10 in the inclined direction. Secondly, the avoiding hole 10 is a blind hole, the rear side surface of the lower end of the elastic block 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 block 4 in a penetrating manner, 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 blocks 4 enables the lower side of the front upper back-rest frame 3 to be reset towards one side of a human body, so that the front upper back-rest frame 3 is actively reset after the passive position is changed.

The design of the convex block 40, the bolt 41 and the avoidance hole 10 enables the two ends of the elastic block 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 arranged at the lower end of the cushion connecting arm 1, and the first concave-convex locking structure 60 and the second concave-convex locking structure 61 are matched.

The upper side of the front lower backrest frame 5 is free, 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 male and female locking structure 61 includes a left and right swinging block 610, a plurality of second locking teeth 611 distributed in a fan shape are disposed on the inner side surface of the left and right swinging block 610, and the first locking teeth 601 and the second locking teeth 611 are engaged 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 containing blind hole 11, the rear convex base 600 is arranged in the containing blind hole 11, the lateral surface of the cushion connecting arm 1 is provided with a lateral through hole 12 communicated with the containing blind hole 11, and the left and right swinging block 610 is arranged in the lateral through hole 12. The second locking tooth 611 of the leftward and rightward swinging block 610 and the first locking tooth 601 of the rear boss 600 are built in such a way as 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 engaged together all the time 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 block 4 designed on the lower side of the upper front backrest frame 3 enables the back to lean against, the relative position of the upper front backrest frame 3 and the lower front backrest frame 5 can be adjusted passively in a self-adaptive mode.

Example two

As shown in fig. 8, the present embodiment provides a swivel chair having a back assembly with adjustable lower and upper backs of the first embodiment. The back of the chair subassembly of adjustable back of body and back of body is installed in cushion 7, and cushion 7 is installed on chair foot 8.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims (10)

1. Back of the chair subassembly of back and last back under the adjustable, including cushion linking arm (1), its characterized in that, the 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 block (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 block (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);

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

2. The adjustable lower and upper back chair back assembly according to claim 1, wherein the resilient blocks (4) are distributed in a manner inclined backwards from top to bottom.

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

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

5. The adjustable back-rest assembly according to claim 1, wherein the first concavo-convex locking structure (60) comprises a rear convex seat (600) disposed at the rear side of the lower end of the front lower back-rest frame (5), and a plurality of first locking teeth (601) distributed in a fan shape are disposed laterally on the rear convex seat (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).

6. The chair back assembly with the adjustable lower back and the adjustable upper back according to claim 5, characterized in that a containing blind hole (11) is formed in the front side surface of the cushion connecting arm (1), the rear convex seat (600) is arranged in the containing blind hole (11), a lateral through hole (12) communicated with the containing blind hole (11) is formed in the lateral surface of the cushion connecting arm (1), and the left and right swinging blocks (610) are arranged in the lateral through hole (12).

7. The adjustable back-rest assembly as claimed in claim 6, wherein the left and right swing blocks (610) are connected to a control handle (612), and the control handle (612) is hingedly connected to the seat cushion connecting arm (1).

8. The adjustable back of chair subassembly of back and upper back of claim 7, characterized in that, back boss (600) rear side is equipped with dodges groove (602) the horizontal through-going of back boss (600) has hinge (603), hinge (603) both ends stretch into respectively in the hinge hole on cushion linking arm (1) hinge (603) go up the cover and be located dodge in groove (602) and act on respectively dodge groove (602) tank bottom and torsional spring (604) that hold blind hole (11) hole bottom the left and right sides of back boss (600) is equipped with arc orbit hole (605) respectively, it has spacing axle of orbit (606) to run through in arc orbit hole (605) the pore wall that holds blind hole (11) is equipped with the shaft hole (13) that supplies spacing axle of orbit (606) both ends stretch into one by one.

9. The adjustable lower back and upper back chair back assembly according to claim 4, wherein the projection (40) is spaced from the bottom of the relief hole (10).

10. Swivel chair, characterized in that it has a back assembly with adjustable lower and upper back according to any of claims 1-9.

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