Seat with adjustable seat angle

Abstract

The present invention discloses a seat with an adjustable seat inclination angle, comprising a base and a seat plate installed at the upper end of the base, arc-shaped tooth plates are provided on the left and right sides of the seat plate, and the two ends of the arc-shaped tooth plates are respectively connected to the lower sides of the front and rear ends of the seat plate, and a gear and a driving gear rotation drive mechanism are installed on the base, wherein the gear meshes with the tooth portion of the arc-shaped tooth plate, and at least two guide wheels are respectively installed on the left and right sides of the base, and the arc-shaped tooth plate is provided with an arc-shaped platform edge that is in rolling contact with the guide wheel. The beneficial effects of the present invention are: it can be automatically adjusted and is easy to operate. At the same time, the arc-shaped tooth plate is supported on the lower side of the seat plate in an inverted arch manner, which has the technical advantage of reliable force, can significantly improve the overall structural strength and supporting performance of the seat, the components are not easy to be damaged, and the service life of the seat is long.

Description

Technical Field

[0001] The invention relates to the technical field of seats, and in particular to a seat with an adjustable seat plate inclination angle. Background Art

[0002] An office chair is a piece of office furniture. Office workers spend most of their working day sitting on a chair. A chair with a reasonable structure and good comfort plays a vital role in alleviating fatigue from sitting for a long time.

[0003] In order to improve sitting comfort, some office chairs have some adjustment functions, such as adjusting the inclination of the seat plate, which allows users to adjust the sitting angle. In the prior art, the adjustment structure that can achieve similar functions is generally designed unreasonably, which is inconvenient to adjust, easy to damage, and lacks overall consideration in terms of force, resulting in poor product reliability. Summary of the invention

[0004] In view of this, the present invention provides a chair with an adjustable seat inclination angle to solve the technical defects of the traditional seat adjustment mechanism, such as being inconvenient to adjust, easy to be damaged and having poor reliability.

[0005] To achieve the above purpose, the technical solution of the present invention is as follows:

[0006] A chair with an adjustable seat inclination angle comprises a base and a seat plate installed at the upper end of the base, wherein the key point is that arc-shaped tooth plates are provided on the left and right sides of the seat plate, the two ends of the arc-shaped tooth plates are respectively connected to the lower sides of the front and rear ends of the seat plate, a gear and a driving mechanism for driving the gear to rotate are installed on the base, wherein the gear meshes with the tooth portion of the arc-shaped tooth plate, guide wheels are respectively installed on both sides of the base, and the arc-shaped tooth plate is provided with an arc-shaped table edge that is in rolling contact with the guide wheel.

[0007] With the above structure, the driving mechanism can control the rotation of the seat plate, thereby adjusting the inclination of the seat plate. In the adjustment mechanism, the arc-shaped tooth plate is supported on the lower side of the seat plate in an inverted arch shape, which has the technical advantage of reliable force, can significantly improve the overall structural strength of the seat, and thus extend the service life of the seat.

[0008] Preferably, a mounting seat is provided at the upper end of the base, and mounting plates extending upward are provided on both sides of the mounting seat, and a mounting cavity is formed between the mounting plates on both sides, the gear is rotatably mounted on the mounting plate, and the driving mechanism is located in the mounting cavity, which includes a motor, a reduction mechanism and a driving shaft that are connected in sequence, wherein the driving shaft passes through the mounting plate along the width direction of the mounting seat and is fixedly connected to the gear. With the above structure, the overall layout is reasonable and easy to assemble.

[0009] As a preferred embodiment, the guide wheel is rotatably mounted on the mounting plate. The above structure is convenient for installation.

[0010] Preferably, the mounting plate is provided with an anti-slip guide component at a position corresponding to the inner edge of the arc-shaped tooth plate, the anti-slip guide component is provided with a trapezoidal annular groove, and the inner edge of the arc-shaped tooth plate is provided with a positioning portion adapted to the trapezoidal annular groove. The above structure allows the arc-shaped tooth plate to be retained between the guide wheel and the anti-slip guide component, thereby enhancing the reliability of use.

[0011] As a preference, there are two anti-dropping guide components and two guide wheels, and each guide component is located above the corresponding guide wheel. The above structure can further increase the reliability of the arc-shaped tooth plate assembly.

[0012] Preferably, a protective cover is installed on the outside of the mounting plate, and at least part of the arc-shaped tooth plate and the gear are located between the mounting plate and the protective cover. The above structure can prevent flexible objects such as clothing from getting stuck in the gear meshing position, thereby increasing the safety performance of the seat.

[0013] Preferably, the base also includes a vertically arranged main force-bearing column, and the axis of at least one of the anti-slip guide components is located on the front side of the seat plate beyond the main force-bearing column. The above structure can ensure the effective meshing of the tooth portion 3a of the arc-shaped toothed plate with the gear, which is conducive to the motor driving the arc-shaped toothed plate to move.

[0014] Preferably, the tooth portion is externally or internally meshed with the gear.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The seat with adjustable seat plate inclination provided by the present invention can be automatically adjusted and is easy to operate. At the same time, the arc-shaped tooth plate is supported on the lower side of the seat plate in an inverted arch shape, which has the technical advantage of reliable force, can significantly improve the overall structural strength and supporting performance of the seat, the parts are not easy to be damaged, and the service life of the seat is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the structure of the seat;

[0018] Figure 2 It is a structural schematic diagram of the rotation connection position between the seat plate and the base;

[0019] Figure 3 for Figure 2 Schematic diagram of the decomposition structure;

[0020] Figure 4 It is a structural schematic diagram of the arc-shaped tooth plate. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with embodiments and drawings.

[0022] like Figures 1 to 4 As shown, a seat with an adjustable seat inclination angle is provided, the seat mainly consists of a base 1 and a seat plate 2 which is rotatably mounted on the upper end of the base 1, wherein arc-shaped toothed plates 3 are mounted on the left and right sides of the seat plate 2, a mounting seat 1a is provided on the upper end of the base 1, and mounting plates 1b extending upward are provided on both sides of the mounting seat 1a, and gears 4 meshing with the toothed portions 3a of the arc-shaped toothed plates 3 are rotatably mounted on the outer walls of the mounting plates 1b, a mounting cavity 1c is formed between the two groups of mounting plates 1b, a driving mechanism 5 is arranged in the mounting cavity 1c, the driving mechanism 5 comprises a motor 5a, a reduction mechanism 5b and a driving shaft 5c which are connected in sequence, wherein the driving shaft 5c passes through the mounting plate 1b along the width direction of the mounting seat 1a, and is fixedly connected to the gear 4 in a spline manner, at least two guide wheels 6 are respectively mounted on the outer walls of the two groups of mounting plates 1b, and an arc-shaped table edge 3b which is in rolling contact with the guide wheel 6 is provided on the arc-shaped toothed plate 3. When the inclination angle of the seat plate 2 needs to be adjusted, the motor 5a is started, and the output power generated by the motor 5a drives the gear 4 to rotate via the reduction mechanism 5b and the drive shaft 5c, thereby driving the arc-shaped toothed plate 3 to move on the two guide wheels 6, that is, driving the seat plate 2 to rotate back and forth relative to the base 1, thereby realizing the adjustment of the inclination angle of the seat plate 2.

[0023] For example Figure 2 As shown, the two ends of the arc-shaped tooth plate 3 are respectively located at the lower side of the front and rear ends of the seat plate 2, so that the arc-shaped tooth plate 3 can be supported on the lower side of the seat plate 2 in an inverted arched manner, thereby improving the reliability of the force support of the seat as a whole, so as to achieve the purpose of extending the service life of the seat. In this embodiment, the gear 4 is externally meshed with the tooth portion 3a of the arc-shaped tooth plate 3. Of course, according to different structural layouts, the gear 4 and the tooth portion 3a can also be driven by internal meshing.

[0024] When the inclination angle of the seat plate 2 is adjusted, in order to keep the arc-shaped toothed plate 3 and the gear 4 always in meshing and ensure the reliability of the rotation of the seat plate 2, the mounting plate 1b is provided with an anti-slip guide component 8 at the position corresponding to the inner diameter edge of the arc-shaped toothed plate 3, and the anti-slip guide component 8 is provided with a trapezoidal annular groove 8a, and the inner diameter edge of the arc-shaped toothed plate 3 is provided with a positioning portion 3c adapted to the trapezoidal annular groove 8a. Furthermore, the anti-slip guide component 8 is adapted to the number of guide wheels 6, and is respectively located above each guide wheel 6. The anti-slip guide component 8 can be fixedly mounted on the mounting plate 1b, or it can be rotatably mounted on the mounting plate 1b in the form of a roller.

[0025] like Figure 1 As shown, in order to prevent flexible items such as clothes from getting stuck in the meshing position of the gear 4 and to increase the safety performance of the seat, a protective cover plate 7 is installed on the outer side of the mounting plate 1b, and at least part of the arc-shaped tooth plate 3 and the gear 4 are located between the mounting plate 1b and the protective cover plate 7.

[0026] For example Figure 1As shown, the base 1 also includes a vertically arranged main load-bearing column 1d. After the seat plate 2 is adjusted backward to a certain inclination angle, a human body sits on the seat, and more of the human body's weight is loaded on the rear side of the seat plate 2. At this time, in order to ensure the effectiveness of the engagement between the tooth portion 3a of the tooth plate 3 and the gear 4, the axial center lines of the two anti-slip guide components 8 are both located on the front side of the seat plate 2 beyond the main load-bearing column 1d.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A seat with an adjustable seat angle, comprising a base (1) and a seat (2) mounted on the upper end of the base (1), characterized in that: The left and right sides of the seat plate (2) are provided with arc-shaped toothed plates (3), and the two ends of the arc-shaped toothed plates (3) are respectively connected to the lower sides of the front and rear ends of the seat plate (2). The base (1) is provided with a gear (4) and a driving mechanism (5) for driving the gear (4) to rotate, wherein the gear (4) meshes with the tooth portion (3a) of the arc-shaped toothed plate (3). Two guide wheels (6) and two anti-slip guide components (8) are respectively installed on both sides of the base (1), and the guide wheels (6) are rotatably mounted on the side of the base (1). The arc-shaped toothed plate (3) is provided with an arc-shaped table edge (3b) that is in rolling contact with the guide wheel (6), and each anti-slip guide component (8) is respectively located above the corresponding guide wheel (6). The anti-slip guide component (8) is provided with a trapezoidal annular groove (8a), and a positioning portion (3c) adapted to the trapezoidal annular groove (8a) is provided on the inner diameter edge of the arc-shaped toothed plate (3); The upper end of the base (1) is provided with a mounting seat (1a), and the two sides of the mounting seat (1a) are provided with mounting plates (1b) extending upwards, and a mounting cavity (1c) is formed between the mounting plates (1b) on the two sides, and the gear (4) is rotatably mounted on the mounting plate (1b), and the driving mechanism (5) is located in the mounting cavity (1c), and comprises a motor (5a), a reduction mechanism (5b) and a driving shaft (5c) which are connected in sequence, wherein the driving shaft (5c) passes through the mounting plate (1b) along the width direction of the mounting seat (1a) and is fixedly connected to the gear (4); The anti-slip guide component (8) is arranged at a position of the mounting plate (1b) corresponding to the inner edge of the arc-shaped tooth plate (3); the guide wheel (6) is rotatably mounted on the mounting plate (1b); and the arc-shaped tooth plate (3) is movably clamped between the two guide wheels (6) and the two anti-slip guide components (8).

2. The seat with adjustable seat angle according to claim 1, characterized in that: The base (1) further comprises a main load-bearing column (1d) arranged vertically, and the axis center line of at least one of the anti-slip guide components (8) is located on the front side of the seat plate (2) beyond the main load-bearing column (1d).

3. The seat with adjustable seat angle according to claim 1, characterized in that: A protective cover plate (7) is installed on the outside of the mounting plate (1b), and at least a portion of the arc-shaped toothed plate (3) and the gear (4) are located between the mounting plate (1b) and the protective cover plate (7).

4. The seat with adjustable seat angle according to claim 1, characterized in that: The tooth portion (3a) is externally meshed or internally meshed with the gear (4).

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