CN219720196U - Chair backrest adjusting structure - Google Patents
Chair backrest adjusting structure Download PDFInfo
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- CN219720196U CN219720196U CN202321086337.XU CN202321086337U CN219720196U CN 219720196 U CN219720196 U CN 219720196U CN 202321086337 U CN202321086337 U CN 202321086337U CN 219720196 U CN219720196 U CN 219720196U
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- Prior art keywords
- connecting piece
- control
- piece
- control arm
- backrest
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- 230000007246 mechanism Effects 0.000 claims abstract description 29
- 210000001503 joint Anatomy 0.000 claims abstract description 4
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 208000008035 Back Pain Diseases 0.000 description 1
- 208000028571 Occupational disease Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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Abstract
The utility model discloses a seat backrest adjusting structure, which comprises a seat frame and a backrest, wherein the seat frame is provided with a backrest adjusting mechanism which is connected with a control arm; the backrest adjusting mechanism comprises a shell, a movable connecting piece, a fixed connecting piece and a control piece, wherein the movable connecting piece, the fixed connecting piece and the control piece are arranged in the shell, the fixed connecting piece is connected with the chair frame, the backrest is connected with the movable connecting piece, the movable connecting piece is movably arranged on the fixed connecting piece through a shaft pin, and the control arm is also arranged on the fixed connecting piece through the shaft pin; the control piece is arranged opposite to the movable connecting piece through a fixed shaft, and the movable connecting piece and the control piece are respectively provided with opposite and matched racks; the control arm is in butt joint with the control piece, the control piece is connected with a spring, and the control piece is pulled to be clamped with the movable connecting piece through the spring. Therefore, the backrest positioning or stepless rotation adjustment can be realized, the structure is simpler than the existing backrest adjusting device, and the parts are fewer, so that the cost is lower, faults are less prone to occurring, and the service life is longer.
Description
Technical Field
The utility model relates to the technical field of seat products, in particular to a seat with an adjustable backrest.
Background
The seat is furniture which is indispensable in life, work and study of people, and the traditional seat has no special function and is only used for sitting. The sitting posture is easy to be uncomfortable and can generate a few direct occupational diseases such as waist soreness and back pain, cervical vertebra protrusion and the like. Therefore, people invent a plurality of seats capable of adjusting the angle of the backrest and even can use the backrest as a reclining chair when the backrest is laid down. However, the backrest angle adjusting means adopted by the current seat is generally complex in structure and numerous in parts, so that the cost is high, the seat is more likely to be broken down, and the service life is influenced, for example, the backrest angle adjusting means disclosed in patent CN 109080510B.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model provides the seat back adjusting structure which has the advantages of simpler structure, lower cost, difficult occurrence of faults, convenient use and longer service life.
In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a seat back adjustment structure, is including chair frame and back, installs back adjustment mechanism on the chair frame, and the back is connected with the chair frame through this back adjustment mechanism, and back adjustment mechanism is connected with the control arm, through the adjustment of control arm control back, its characterized in that: the backrest adjusting mechanism comprises a shell, a movable connecting piece, a fixed connecting piece and a control piece, wherein the movable connecting piece, the fixed connecting piece and the control piece are arranged in the shell, the fixed connecting piece is fixedly connected with the chair frame, the backrest is fixedly connected with the movable connecting piece, the movable connecting piece is movably arranged on the fixed connecting piece through a shaft pin, and the control arm is also arranged on the fixed connecting piece through the shaft pin to form a rotatable structure; the control piece is arranged into a rotatable structure opposite to the movable connecting piece through a fixed shaft, and the movable connecting piece and the control piece are respectively provided with arc racks which are opposite and matched; the control arm is in butt joint with the control piece, and the control piece is pushed by the control arm to be separated from the movable connecting piece, so that the backrest can rotate; the control piece is connected with a spring, and the rack of the control piece is clamped with the rack of the movable connecting piece through the elasticity of the spring to fix the backrest.
Further, a pushing pin is arranged on the side face of the control piece, a strip-shaped movable hole and a pushing hole are respectively arranged at the positions of the fixed connecting piece and the control arm, which are opposite to the pushing pin, the pushing pin penetrates into the pushing hole through the movable hole, the control piece and the rack of the movable connecting piece are separated from each other by pushing down the pushing pin by pushing down the control arm, and at the moment, the movable connecting piece can rotate relative to the fixed connecting piece, so that the backrest is adjusted.
Further, the front end of the control arm is connected with the shaft pin, a fixed pin is arranged between the front end of the control arm and the pushing hole, one end of the spring is connected with the fixed pin, and the other end of the spring is connected with the fixed shaft. After the control arm is loosened, the control piece can be reset to be clamped with the movable connecting piece under the action of the elasticity of the spring, so that the backrest is ensured not to be loosened.
Further, a guide pin is arranged on the movable connecting piece, an arc-shaped guide hole is formed in the fixed connecting piece, and the guide pin is inserted into the guide hole to form a guide structure when the movable connecting piece rotates, so that the backrest is more stable when rotating.
Preferably, the angle of the arc corresponding to the rack on the articulation piece is 70-90 degrees, so that the backrest can be adjusted between approximately vertical and lying.
Further, two backrest adjusting mechanisms are respectively arranged at two sides of the tail part of the chair frame, and the two backrest adjusting mechanisms are connected into a synchronous moving structure by adopting a linkage rod. Thus, according to the control arm on one side, the control pieces on two sides can be simultaneously separated from contact with the corresponding movable connecting pieces, and the backrest can be rotated downwards or upwards at the moment.
Further, the backrest adjusting mechanism on one side is connected with a control arm, the backrest adjusting mechanism on the other side is connected with a connecting arm, and the linkage rod is connected between the control arm and the connecting arm.
Further, the connecting arm has the same structure as the front section (i.e., the portion located in the housing) of the control arm, and the rear section of the control arm has an operation handle to form the control arm so as to be operated by hand.
Further, the racks of the movable connecting pieces are in convex arc structures, and the racks of the control pieces are in concave arc structures.
Further, the fixed connecting piece stretches out one section outside the shell and is connected with the chair frame, the movable connecting piece stretches out one section outside the shell and is connected with the backrest, and the control arm stretches out one section below the chair frame, so that the control arm is convenient to control by hand.
The utility model mainly makes the arc racks of the movable connecting piece and the control piece clamped or separated by the mutual matching of the movable connecting piece, the fixed connecting piece, the control arm and the control piece so as to realize the positioning or stepless rotation adjustment of the backrest.
Drawings
FIG. 1 is a diagram of the overall structure of the present utility model;
FIG. 2 is a block diagram of another aspect of the utility model;
FIG. 3 is a view showing the structure of the backrest of the present utility model after the backrest is reclined;
FIG. 4 is an internal structural view of the back rest adjustment mechanism;
fig. 5 is an exploded view of the internal body structure of the backrest adjustment mechanism.
In the figure, 1 is a chair frame, 2 is a seat cushion, 3 is a backrest adjusting mechanism, 31 is a shell, 311 is a fixed shaft, 32 is a movable connecting piece, 321 is a guide pin, 33 is a fixed connecting piece, 331 is a movable hole, 332 is a guide hole, 34 is a control piece, 341 is a pushing pin, 35 is a shaft pin, 36 is a spring, 4 is a backrest, 5 is a control arm, 51 is a pushing hole, 52 is a fixed pin, and 6 is a linkage rod.
Detailed Description
In this embodiment, referring to fig. 1 to 5, the seat back adjusting structure includes a seat frame 1, a seat cushion 2 and a backrest 4, the seat cushion 2 is mounted on the seat frame 1, a backrest adjusting mechanism 3 is mounted on the seat frame 1, the backrest 4 is connected with the seat frame 1 through the backrest adjusting mechanism 3, the backrest adjusting mechanism 3 is connected with a control arm 5, and the adjustment of the backrest 4 is controlled through the control arm 5; the backrest adjusting mechanism 3 comprises a shell 31, a movable connecting piece 32, a fixed connecting piece 33 and a control piece 34, wherein the movable connecting piece 32, the fixed connecting piece 33 and the chair frame 1 are fixedly connected, the backrest 4 and the movable connecting piece 32 are fixedly connected, the movable connecting piece 32 is movably arranged on the fixed connecting piece 33 through a shaft pin 35, and the control arm 5 is also arranged on the fixed connecting piece 33 through the shaft pin 35 to form a rotatable structure; the control piece 34 is arranged into a rotatable structure opposite to the movable connecting piece 32 through a fixed shaft 311, the movable connecting piece 32 and the control piece 34 are respectively provided with arc racks which are opposite and matched, and the fixed shaft 311 is penetrated on the shell; the control arm 5 is in butt joint with the control piece 34, and the control piece 34 is pushed by the control arm 5 to be separated from the movable connecting piece 32, so that the backrest 4 can rotate; the control member 34 is connected with a spring 36, and the rack of the control member 34 is clamped with the rack of the movable connecting member 32 by the elastic force of the spring 36 to fix the backrest 4, so that the backrest 4 can be positioned at a certain angle.
A pushing pin 341 is disposed on the side of the control member 34, a strip-shaped movable hole 331 and a pushing hole 51 are disposed at the positions of the fixed connection member 33 and the control arm 5 opposite to the pushing pin 341, the pushing pin 341 penetrates into the pushing hole 51 through the movable hole 331, the control arm 5 is pressed down to separate the control member 34 from the rack of the movable connection member 32, and at this time, the movable connection member 32 can rotate relative to the fixed connection member 33, so as to realize the adjustment of the backrest 4.
The front end of the control arm 5 is connected to the shaft pin 35, a fixing pin 52 is provided between the front end of the control arm 5 and the push hole 51, one end of the spring 36 is connected to the fixing pin 52, and the other end is connected to the fixing shaft 311. After the control arm 5 is released, the control piece 34 is restored to be clamped with the movable connecting piece 32 under the action of the elastic force of the spring 36, so that the backrest 4 is ensured not to be loosened.
The movable connecting piece 32 is provided with a guide pin 321, the fixed connecting piece 33 is provided with an arc-shaped guide hole 332, and the guide pin 321 is inserted into the guide hole 332 to form a guide limiting structure when the movable connecting piece 32 rotates, so that the backrest 4 can be adjusted within a limited range and cannot fall forward or backward.
The angle of the arc of a circle corresponding to the rack on the articulation 32 is 70-90 degrees, such as 85 degrees, so as to allow the backrest 4 to be adjusted between approximately vertical and lying.
Two backrest adjusting mechanisms 3 are respectively arranged at two sides of the tail part of the chair frame 1, and the two backrest adjusting mechanisms 3 are connected into a synchronous moving structure by adopting a linkage rod 6. Thus, by pressing one control arm 5, the control members 34 on both sides are simultaneously separated from contact with the corresponding movable connecting members 32, and the backrest 4 can be rotated downwards or upwards.
Wherein the backrest adjusting mechanism 3 on one side is connected with a control arm 5, the backrest adjusting mechanism 3 on the other side is connected with a connecting arm (not labeled), and the linkage rod 6 is connected between the control arm 5 and the connecting arm.
The connecting arm has the same structure as the front section (i.e., the portion located in the housing) of the control arm 5, and the rear section of the control arm 5 has an operating handle to form the control arm for manual operation.
The rack of the movable connecting piece 32 has a convex arc structure, and the rack of the control piece 34 has a concave arc structure.
The fixed connecting piece 33 extends out of the shell 31 to be connected with the chair frame 1, the movable connecting piece 32 extends out of the shell 31 to be connected with the backrest 4, and the control arm 5 extends out of the lower part of the chair frame 1 to be convenient to control by hand.
The utility model is especially suitable for school as student chair, thus, when students are in noon break, the chair backrest of the utility model can be put flat and then matched with a special desk (filed in another way), the desk can be put at an inclined position without moving the position of the desk and chair, and the comfortable noon break environment can be provided for students by utilizing the original seat space.
The foregoing detailed description of the utility model has been presented for purposes of illustration and description, but is not intended to limit the scope of the utility model, i.e., the utility model is not limited to the details shown and described.
Claims (10)
1. The utility model provides a seat back adjustment structure, is including chair frame and back, installs back adjustment mechanism on the chair frame, and the back is connected with the chair frame through this back adjustment mechanism, and back adjustment mechanism is connected with the control arm, through the adjustment of control arm control back, its characterized in that: the backrest adjusting mechanism comprises a shell, a movable connecting piece, a fixed connecting piece and a control piece, wherein the movable connecting piece, the fixed connecting piece and the control piece are arranged in the shell, the fixed connecting piece is fixedly connected with the chair frame, the backrest is fixedly connected with the movable connecting piece, the movable connecting piece is movably arranged on the fixed connecting piece through a shaft pin, and the control arm is arranged on the fixed connecting piece to form a rotatable structure; the control piece is arranged into a rotatable structure opposite to the movable connecting piece through a fixed shaft, and the movable connecting piece and the control piece are respectively provided with arc racks which are opposite and matched; the control arm is in butt joint with the control piece, and the control piece is pushed by the control arm to be separated from the movable connecting piece, so that the backrest can rotate; the control piece is connected with a spring, and the rack of the control piece is clamped with the rack of the movable connecting piece through the elasticity of the spring to fix the backrest.
2. The seat back adjustment structure according to claim 1, characterized in that: the control arm is also installed on the fixed connecting piece through the shaft pin, a pushing pin is arranged on the side face of the control piece, a strip-shaped movable hole and a pushing hole are respectively arranged at the positions of the fixed connecting piece and the control arm, which are opposite to the pushing pin, the pushing pin penetrates into the pushing hole through the movable hole, and the pushing pin is pressed down by pressing the control arm so that the control piece and the racks of the movable connecting piece are separated from each other.
3. The seat back adjustment structure according to claim 2, characterized in that: the front end of the control arm is connected with the shaft pin, a fixed pin is arranged between the front end of the control arm and the pushing hole, one end of the spring is connected with the fixed pin, and the other end of the spring is connected with the fixed shaft.
4. The seat back adjustment structure according to claim 1, characterized in that: the movable connecting piece is provided with a guide pin, the fixed connecting piece is provided with an arc-shaped guide hole, and the guide pin is inserted into the guide hole to form a guide structure when the movable connecting piece rotates.
5. The seat back adjustment structure according to claim 1, characterized in that: the arc angle corresponding to the rack on the movable connecting piece is 70-90 degrees.
6. The seat back adjustment structure according to claim 1, characterized in that: two backrest adjusting mechanisms are respectively arranged at two sides of the tail part of the chair frame, and the two backrest adjusting mechanisms are connected into a synchronous movable structure by adopting a linkage rod.
7. The seat back adjustment structure according to claim 6, characterized in that: wherein the backrest adjusting mechanism on one side is connected with a control arm, the backrest adjusting mechanism on the other side is connected with a connecting arm, and the linkage rod is connected between the control arm and the connecting arm.
8. The seat back adjustment structure according to claim 7, characterized in that: the connecting arm and the front section of the control arm have the same structure, and the rear section of the control arm is provided with an operating handle to form the control arm.
9. The seat back adjustment structure according to claim 5, characterized in that: the racks of the movable connecting pieces are in convex arc structures, and the racks of the control pieces are in concave arc structures.
10. The seat back adjustment structure according to claim 1, characterized in that: the fixed connecting piece stretches out one section outside the shell and is connected with the chair frame, the movable connecting piece stretches out one section outside the shell and is connected with the backrest, and the control arm stretches out one section below the chair frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321086337.XU CN219720196U (en) | 2023-05-06 | 2023-05-06 | Chair backrest adjusting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321086337.XU CN219720196U (en) | 2023-05-06 | 2023-05-06 | Chair backrest adjusting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219720196U true CN219720196U (en) | 2023-09-22 |
Family
ID=88059439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321086337.XU Active CN219720196U (en) | 2023-05-06 | 2023-05-06 | Chair backrest adjusting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219720196U (en) |
-
2023
- 2023-05-06 CN CN202321086337.XU patent/CN219720196U/en active Active
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