Chair back structure with adjustable inclination angle

Abstract

The invention discloses a chair back structure with an adjustable inclination angle. The chair back structure comprises a cushion, a backrest, a push rod and a pushing and unfolding sheet, the backrest is hinged to the cushion through a pin shaft, the whole pushing and unfolding piece is splayed, the tail end of the pushing and unfolding piece is fixedly connected to the cushion, and the head end of the pushing and unfolding piece is movably connected to the backrest; the middle of the pushing and unfolding piece is connected with the push rod, the pushing and unfolding piece is pushed by the push rod to move towards the backrest, the pushing and unfolding piece deforms under stress to enable the head end and the tail end to be gradually separated, and the backrest is pushed to tilt through the head end of the pushing and unfolding piece. The device has the advantages of simple structure, compact matching, reasonable design and the like; therefore, the device is a product with excellent technical and economical performance.

Description

[Technical field]

[0001] The invention relates to a chair back structure with adjustable tilt angle. [Background technology]

[0002] The main reason why the backrest of a chair needs to be adjustable is to provide personalized support and comfort, as well as to promote correct sitting posture. According to the principles of ergonomics, different people have different body sizes and sitting preferences. The adjustable backrest can be adjusted according to the needs of the user to ensure that the waist is properly supported and reduce back and waist fatigue caused by long-term sitting. In order to facilitate the adjustment of the chair backrest, we propose a new structural solution. [Summary of the invention]

[0003] In order to solve at least one of the above problems, the present invention proposes a new structural solution. The chair back structure with adjustable tilt angle adopts the following technical solution:

[0004] A chair back structure with adjustable tilt angle, comprising a seat cushion, a backrest, a push rod and a push plate;

[0005] The backrest is hinged to the seat cushion through a pin shaft, and the pushing piece is in an eight-shaped shape as a whole. The end of the pushing piece is fixed to the seat cushion, and the head end is movably connected to the backrest; the middle part of the pushing piece is connected to the push rod, and the pushing piece is pushed by the push rod to move toward the backrest. The pushing piece is deformed by force so that its head and tail ends are gradually separated, so that the backrest can be pushed to recline through the head end of the pushing piece.

[0006] Preferably, the seat cushion is provided with a through cavity, the middle portion of the pushing piece is placed in the through cavity, and the head end and the tail end of the pushing piece extend out of the through cavity.

[0007] Preferably, an inserting cavity is provided in the backrest, and the head end of the pushing piece remains connected to the inserting cavity.

[0008] Preferably, the push rod is T-shaped as a whole, and comprises a rod portion and a pushing portion, and the push rod is connected to the pushing piece via the rod portion.

[0009] Preferably, sliding windows are provided on both sides of the seat cushion, the sliding windows are connected to the through cavity, the rod portion is located in the insertion cavity, and the push portion is located in the sliding window; the push portion moves along the sliding window to change the position of the push piece, thereby changing the deformation amount of the push piece.

[0010] Preferably, the sliding window is provided with latching teeth, and the push portion is connected to the latching teeth to limit the position of the push rod.

[0011] Preferably, the seat cushion is installed with a chassis bracket, and the chassis bracket is installed with universal wheels.

[0012] The beneficial effects of the present invention compared with the background technology are as follows:

[0013] In order to facilitate the adjustment of the tilt angle of the chair backrest, the present invention proposes a chair back structure with adjustable tilt angle, which includes a seat cushion, a backrest, a push rod, and a push piece; by pushing the push rod, the push piece connected to the push rod is controlled to move and retract in the through cavity, so that the tilt angle of the backrest can be adjusted, which is simple and convenient. It has the advantages of simple structure, compact fit, and reasonable design; therefore, it is a product with superior performance in both technical and economic performance.

Brief Description of the Drawings

[0014] Figure 1 A schematic diagram of a chair back structure with adjustable tilt angle in a preferred embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram of an exploded view of a chair back structure with adjustable tilt angle in a preferred embodiment of the present invention;

[0016] Figure 3 It is a schematic diagram of the abutment between the backrest and the push plate in the preferred embodiment provided by the present invention. [Specific implementation method]

[0017] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0018] In the present invention, unless otherwise specified and limited, the terms "assemble", "connect", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or the two elements can be internally connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] The following is a further description of the specific embodiments of the present invention in conjunction with the drawings of the specification, so that the technical solution and beneficial effects of the present invention are clearer and more explicit. The following description of the embodiments with reference to the drawings is exemplary and intended to explain the present invention, but cannot be understood as limiting the present invention.

[0020] The preferred embodiment provided by the present invention is as follows: Figure 1 to Figure 3 As shown, a chair back structure with adjustable tilt angle includes a seat cushion 1, a backrest 2, a push rod 3, and a push piece 4; the seat cushion 1 is installed with a chassis bracket 5, and the chassis bracket 5 is installed with universal wheels to facilitate the movement of the chair.

[0021] The backrest 2 is hinged to the seat cushion 1 through a pin shaft, and the push piece 4 is in an eight-shaped shape as a whole. The end of the push piece 4 is fixed to the seat cushion 1, and the head end is movably connected to the backrest 2. An insertion cavity 21 is provided in the backrest 2, and the head end of the push piece 4 remains connected to the insertion cavity 21. The middle part 41 of the push piece 4 is connected to the push rod 3, and the push piece 4 is pushed by the push rod 3 to move toward the backrest 2. The push piece 4 is deformed by force so that its head end and the end are gradually separated, so that the backrest 2 is pushed to recline through the head end of the push piece 4.

[0022] The seat cushion 1 is provided with a through cavity 11, and the middle part 41 of the pushing piece 4 is placed in the through cavity 11, and the head end and the tail end of the pushing piece 4 extend out of the through cavity 11. The moving path of the pushing piece 4 can be limited by the through cavity 11, and the middle part 41 of the pushing piece 4 should be kept in the through cavity 11.

[0023] The push rod 3 is T-shaped as a whole, and includes a rod portion 31 and a push portion 32. The push rod 3 is connected to the push piece 4 through the rod portion 31. Sliding windows 12 are provided on both sides of the seat cushion 1. The sliding windows 12 are connected to the through cavity 11. The rod portion 31 is located in the insertion cavity 21, and the push portion 32 is located in the sliding window 12. The push portion 32 moves along the sliding window 12 to change the position of the push piece 4, thereby changing the deformation of the push piece 4. The sliding window 12 is provided with a latch 13, and the push portion 32 is connected to the latch 13 to limit the position of the push rod 3, so that the backrest 2 maintains the current reclining angle.

[0024] The process of adjusting the backrest reclining angle is as follows: make the pushing portion 32 of the pushing rod 3 disengage from the position of the latch tooth 13, push the pushing rod 3 backward, and the rod portion 31 of the pushing rod 3 pushes the pushing piece 4 to extend out of the through cavity 11. Since the end of the pushing piece 4 is fixedly connected to the seat cushion 1, the pushing piece 4 is deformed under pressure and can only make the head end of the pushing piece 4 gradually penetrate into the insertion cavity 21. At this time, the angle formed by the head end and the end of the pushing piece 4 becomes larger and larger, and the inclination angle of the backrest 2 pushed by the head end of the pushing piece 4 also becomes larger. After adjusting the inclination angle, the pushing portion 32 is re-engaged in the position of the latch tooth 13 to limit the position of the pushing rod 3, thereby maintaining the inclination angle of the backrest 2.

[0025] In the description of the specification, the description with reference to the terms "one embodiment", "preferably", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention, and the schematic expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0026] Through the description of the above structure and principle, technicians in the relevant technical field should understand that the present invention is not limited to the above-mentioned specific implementation methods. Improvements and substitutions based on the present invention using the well-known technology in the field all fall within the protection scope of the present invention and should be defined by the claims.

Claims

1. A chair back structure with adjustable tilt angle, characterized in that: It includes a seat cushion, a backrest, a push rod, and a push piece; The backrest is hinged to the seat cushion through a pin shaft, and the pushing piece is in an eight-shaped shape as a whole. The end of the pushing piece is fixed to the seat cushion, and the head end is movably connected to the backrest; the middle part of the pushing piece is connected to the push rod, and the pushing piece is pushed by the push rod to move toward the backrest. The pushing piece is deformed by force so that its head and tail ends are gradually separated, so that the backrest can be pushed to recline through the head end of the pushing piece.

2. The chair back structure with adjustable tilt angle according to claim 1, characterized in that: The seat cushion is provided with a through cavity, the middle part of the pushing piece is placed in the through cavity, and the head end and the tail end of the pushing piece extend out of the through cavity.

3. The chair back structure with adjustable tilt angle according to claim 1, characterized in that: An inserting cavity is arranged in the backrest, and the head end of the pushing piece is kept connected in the inserting cavity.

4. The chair back structure with adjustable tilt angle according to claim 1, characterized in that: The push rod is T-shaped as a whole, and comprises a rod portion and a pushing portion, and the push rod is connected to the pushing piece through the rod portion.

5. The chair back structure with adjustable tilt angle according to claim 4, characterized in that: Sliding windows are arranged on both sides of the seat cushion, the sliding windows are connected with the through cavity, the rod is located in the insertion cavity, and the push part is located in the sliding window; the push part moves along the sliding window to change the position of the push piece, thereby changing the deformation amount of the push piece.

6. The chair back structure with adjustable tilt angle according to claim 5, characterized in that: The push-pull window is provided with latching teeth, and the push portion is connected with the latching teeth to limit the position of the push rod.

7. The chair back structure with adjustable tilt angle according to claim 1, characterized in that: The seat cushion is installed with a chassis bracket, and the chassis bracket is installed with a universal wheel.

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