CN215382638U

CN215382638U - Seat chassis and seat

Info

Publication number: CN215382638U
Application number: CN202121124040.9U
Authority: CN
Inventors: 朱正根; 容锦昌
Original assignee: Foshan Sitzone Furniture Co ltd
Current assignee: Foshan Sitzone Furniture Co ltd
Priority date: 2021-02-08
Filing date: 2021-05-24
Publication date: 2022-01-04
Anticipated expiration: 2031-05-24
Also published as: CN113142862A

Abstract

The utility model discloses a seat chassis and a seat, which comprise a base, a connecting device, a resetting device and an adjusting device, wherein the connecting device comprises a connecting seat and a connecting shaft, the connecting shaft is fixedly connected with the base, the connecting seat is rotatably connected with the connecting shaft and is used for connecting with a seat back, the connecting seat is provided with a butting surface, the butting surface is arranged on one side of the connecting seat, which is far away from the seat back, the resetting device comprises a resetting unit and a butting shaft, the resetting unit is rotatably connected with the base and is used for applying resetting force to the butting shaft, the butting shaft is butted with the butting surface, the adjusting device comprises an eccentric gear, and the eccentric gear is connected with the connecting shaft, wherein one side of the butting surface, which is far away from the seat back, obliquely extends towards the direction of the resetting unit, the circumferential surface of the eccentric gear is butted with the butting shaft so as to adjust the butting position of the butting shaft and the butting surface. According to the seat chassis and the seat, the adjusting structure of the inclination angle of the seat back and the reset force of the seat back is optimized, and the adjusting convenience is improved.

Description

Seat chassis and seat

Technical Field

The utility model relates to the technical field of seats, in particular to a seat chassis and a seat adopting the seat chassis.

Background

The chair is a piece of furniture which is indispensable when people work and have a rest. The chair back is one of important parts on the chair, provides back support for people and provides a resetting force so as to improve the use comfort.

Due to the difference of sitting postures and body shapes of each person, the requirements on the inclination angle of the chair back and the reset force of the chair back are different. In the using process, the size of the inclination angle of the chair back and the size of the chair back reset force also need to be adjusted due to the change of the posture of a user so as to meet the using requirement.

The inclination angle adjustment of the chair back and the reset force adjustment of the chair back are mainly completed by the chassis. Therefore, in the design of the seat, the design of the seat pan is very critical. The traditional seat chassis is complex in structure and inconvenient to adjust, and cannot meet the market demand.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a seat chassis and a seat, which optimize the adjusting structure of the inclination angle of the seat back and the reset force of the seat back and improve the convenience of adjustment.

A seat pan according to an embodiment of the first aspect of the utility model comprises: a base; the connecting device comprises a connecting seat and a connecting shaft; the connecting shaft is fixedly connected with the base, and the connecting seat is rotatably connected with the connecting shaft; the connecting seat is used for connecting the chair back; the connecting seat is provided with an abutting surface which is arranged on one side of the connecting seat, which is far away from the chair back; the reset device comprises a reset unit and an abutting shaft; the reset unit is rotatably connected with the base and is used for applying reset force to the butting shaft; the abutting shaft abuts against the abutting surface; the adjusting device comprises an eccentric gear; the eccentric gear is connected with the connecting shaft; wherein one side of the abutting surface, which is far away from the chair back, extends obliquely to the direction of the reset unit; the circumferential surface of the eccentric gear is abutted to the abutting shaft so as to adjust the abutting position of the abutting shaft and the abutting surface.

The seat chassis according to the embodiment of the first aspect of the utility model has at least the following technical effects: the abutting shaft is clamped between the eccentric gear and the abutting surface, and the abutting positions of the abutting shaft and the abutting surface are adjusted by rotating the eccentric gear and utilizing the difference of the distances from all the circumferential surfaces of the eccentric gear to the axis, so that the force arm of the chair back is adjusted, and the inclination angle of the chair back and the reset force of the chair back are adjusted. Therefore, the utility model provides the seat chassis, optimizes the adjusting structure of the inclination angle of the chair back and the resetting force of the chair back, and improves the adjusting convenience.

According to some embodiments of the utility model, the eccentric gear is provided with a plurality of arc-shaped grooves; the arc-shaped groove is abutted to the abutting shaft and used for positioning the abutting position of the abutting shaft and the abutting surface.

According to some embodiments of the utility model, the adjustment device comprises a knob and two pull wires; the eccentric gear is rotationally connected with the connecting shaft; the knob controls the eccentric gear to rotate through the two pull wires so as to adjust the abutting position of the abutting shaft and the abutting surface.

According to some embodiments of the utility model, the knob comprises an outer cover, a wire drum, a driving gear and a driven gear; the outer cover and the wire barrel are respectively and rotatably connected with the base; the driving gear is connected with the outer cover, and the driven gear is connected with the bobbin; the driving gear is meshed with the driven gear so as to realize that the outer cover drives the wire barrel to rotate; one ends of the two pull wires, which are far away from the eccentric gear, are connected with the wire barrel; the wire barrel is used for controlling the retraction of the pull wire so as to control the rotation of the eccentric gear.

According to some embodiments of the utility model, the adjustment device comprises a wire connection piece provided with a wire groove; one side of the eccentric gear, which is far away from the butting shaft, is fixedly connected with the wiring piece; the wire groove is arranged on one side of the wiring piece, which is far away from the eccentric gear; one ends of the two pull wires, which are far away from the knob, are respectively connected with two ends of the wiring piece; the stay wire is abutted against the groove wall of the wire groove.

According to some embodiments of the utility model, the number of the abutment surfaces, the reset unit and the eccentric gears is two; the two abutting surfaces, the two reset units and the two eccentric gears are symmetrically provided with two ends of the abutting shaft.

According to some embodiments of the utility model, the adjustment device comprises a linkage shaft; the linkage shaft is of a hollow structure, is sleeved outside the connecting shaft and is coaxially arranged with the connecting shaft; two ends of the linkage shaft are respectively connected with the two eccentric gears to realize linkage of the two eccentric gears.

According to some embodiments of the utility model, the reset unit comprises a rotating shaft, a sleeve, a connecting member and a compression spring; the rotating shaft is rotatably connected with the base; one end of the sleeve is fixedly connected with the rotating shaft; one end of the connecting piece is abutted against the inner wall of the sleeve and is arranged at one end of the sleeve far away from the rotating shaft; one end of the connecting piece, which is far away from the sleeve, is rotatably connected with the abutting shaft; the compression spring is sleeved outside the sleeve and the connecting piece; one end of the compression spring is connected with the sleeve, and one end of the compression spring, which is far away from the sleeve, is connected with the connecting piece.

According to some embodiments of the utility model, the connecting member comprises an abutment bar and a turning block; one end of the abutting rod abuts against the inner wall of the sleeve, and the end far away from the sleeve is fixedly connected with the rotating block; the rotating block is provided with a rotating groove; the rotating groove is arranged at one end of the rotating block, which is far away from the abutting rod; the abutting shaft comprises a rotating rod and a positioning block; the rotating rods penetrate through the two side walls of the rotating groove and are rotatably connected with the rotating groove; the positioning block is fixedly sleeved on the rotating rod and arranged in the rotating groove and used for positioning the position of the rotating block; the positioning block is abutted against the abutting surface.

A seat according to an embodiment of the second aspect of the utility model comprises: a seat pan according to an embodiment of the first aspect of the utility model; the chair back is arranged on the connecting seat and is arranged at one end, far away from the abutting surface, of the connecting seat.

According to the seat of the embodiment of the second aspect of the utility model, at least the following technical effects are achieved: by adopting the seat chassis provided by the embodiment of the first aspect of the utility model, the adjusting structure of the inclination angle of the chair back and the resetting force of the chair back is optimized, and the adjusting convenience is improved.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic cross-sectional view of a seat pan of an embodiment of the present invention;

FIG. 2 is a schematic view of an adjustment mechanism for a seat pan of an embodiment of the present invention;

FIG. 3 is an overall schematic view of a seat pan of an embodiment of the present invention;

FIG. 4 is a schematic view of a knob of a seat pan of an embodiment of the present invention;

FIG. 5 is an exploded view at A of FIG. 4;

FIG. 6 is a schematic cross-sectional view of a reduction device according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a resetting device according to an embodiment of the utility model.

Reference numerals:

a seat chassis 100,

A base 200,

A connecting device 300, a connecting seat 310, a connecting shaft 320, an abutting surface 330,

Reset device 400, reset unit 410, rotating shaft 411, sleeve 412, connecting piece 413, compression spring 414, abutting rod 415, rotating block 416, rotating groove 417, abutting shaft 420, rotating rod 421, positioning block 422,

The adjusting device 500, the eccentric gear 510, the arc-shaped groove 511, the knob 520, the outer cover 521, the wire barrel 522, the driving gear 523, the driven gear 524, the wire connecting piece 530, the wire groove 531 and the linkage shaft 540.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

A seat pan 100 according to an embodiment of the present invention, and a seat employing the seat pan 100 are described below with reference to fig. 1 to 7.

As shown in fig. 1, the seat pan 100 according to the embodiment of the present invention includes a base 200, a connecting device 300, a returning device 400, and an adjusting device 500.

As shown in fig. 1, the connecting device 300 includes a connecting seat 310 and a connecting shaft 320, the connecting shaft 320 is fixedly connected with the base 200, the connecting seat 310 is rotatably connected with the connecting shaft 320, the connecting seat 310 is used for connecting the chair back, the connecting seat 310 is provided with an abutting surface 330, the abutting surface 330 is disposed on one side of the connecting seat 310, which is away from the chair back, the resetting device 400 includes a resetting unit 410 and an abutting shaft 420, the resetting unit 410 is rotatably connected with the base 200, and is used for applying a resetting force to the abutting shaft 420, the abutting shaft 420 abuts against the abutting surface 330, the adjusting device 500 includes an eccentric gear 510, the eccentric gear 510 is connected with the connecting shaft 320, wherein one side of the abutting surface 330, which is far away from the chair back, is inclined and extends towards the direction of the resetting unit 410, the circumferential surface of the eccentric gear 510 abuts against the abutting shaft 420, so as to adjust the abutting position of the abutting shaft 420 and the abutting surface 330.

As shown in fig. 1, the connecting seat 310 is rotatably connected to the connecting shaft 320, one end of the connecting seat 310 is connected to the seat back, one side of the connecting seat 310, which is away from the seat back, is provided with an abutting surface 330, the connecting shaft 320 is arranged between the seat back and the abutting surface 330, when a person leans on the seat back, a downward tilting force is applied to the seat back, and the seat back drives the connecting seat 310 to rotate around the connecting shaft 320, so that the abutting surface 330 mounted on the other side of the connecting shaft 320 moves upward in a tilting manner. When the abutting surface 330 moves to apply a backrest pushing force to the abutting shaft 420, the resetting device 400 acts to apply a resetting force opposite to the backrest pushing force to the abutting shaft 420, so that the tilting angle of the backrest can be fixed within a certain range.

The side end of the abutment surface 330 away from the seat back extends obliquely in the direction of the returning unit 410, i.e. the abutment surface 330 is inclined upward from the returning unit 410 in the direction of the seat back, so that the abutment surface 330 applies an upward pushing force to the returning device 400 and simultaneously applies an upward pushing force to the abutment shaft 420. The eccentric gear 510 and the coupling shaft 320 are disposed above the abutment shaft 420, and the circumferential surface of the eccentric gear 510 abuts against the abutment shaft 420 to apply a downward pushing force to the abutment shaft 420, thereby clamping the abutment shaft 420 between the abutment surface 330 and the eccentric gear 510 and fixing the abutment position between the abutment shaft 420 and the abutment surface 330. When the eccentric gear 510 rotates around the connecting shaft 320, due to the different distances from the circumferential surfaces of the eccentric gear 510 to the axis, the abutting shaft 420 is pushed to move upwards or downwards under the combined action of the abutting surface 330, so that the abutting positions of the abutting shaft 420 and the abutting surface 330 are adjusted, and the tilting angle of the chair back and the resetting force of the chair back are adjusted.

Taking the abutting shaft 420 as an example of moving downward, when the eccentric gear 510 rotates around the connecting shaft 320, the radius of the abutting portion between the eccentric gear 510 and the abutting shaft 420 becomes larger, and when the axial position of the eccentric gear 510 is fixed, the eccentric gear 510 pushes the abutting shaft 420 to move to a position away from the connecting shaft 320, that is, the eccentric gear 510 applies a downward pushing force to the abutting shaft 420, so that the abutting shaft 420 moves downward, and the abutting position between the abutting shaft 420 and the abutting surface 330 moves downward. Because of human lean on the back of the chair some distance to the butt position, for the arm of force of human application of force, when the lean on point position is fixed, the butt position downstream for the lean on point is to the distance grow of butt position, thereby makes the arm of force grow of human application of force, and when the power of restoring to the throne is fixed, the back of the chair will reach predetermined angle of leaning on, and required manpower application of force diminishes, thereby the adjustment back of the chair power of restoring to the throne size. It is conceivable that, correspondingly, when the eccentric gear 510 rotates reversely, the radius of the abutting part of the eccentric gear 510 and the abutting shaft 420 becomes smaller, the abutting surface 330 applies an upward pushing force to the abutting shaft 420, so that the abutting position moves downward, thereby the distance from the leaning point to the abutting position becomes smaller, the force arm of the force applied by the human body becomes smaller, when the reset force is constant, the chair back reaches a predetermined tilting angle, the required manual force is increased, and thereby the reset force of the chair back is adjusted.

In the seat chassis 100 according to the embodiment of the utility model, the abutting shaft 420 is clamped between the eccentric gear 510 and the abutting surface 330, and by rotating the eccentric gear 510, the abutting position between the abutting shaft 420 and the abutting surface 330 is adjusted by utilizing the difference of the distances from the circumferential surfaces of the eccentric gear 510 to the axial center, so as to adjust the force arm of the seat back, and further adjust the tilt angle of the seat back and the reset force of the seat back. Therefore, the present invention provides the seat chassis 100, which optimizes the adjustment structure of the tilt angle of the seat back and the return force of the seat back, and improves the adjustment convenience.

In some embodiments of the present invention, as shown in fig. 2, the eccentric gear 510 is provided with a plurality of arc-shaped grooves 511, and the arc-shaped grooves 511 are abutted with the abutment shaft 420 for positioning the abutment position of the abutment shaft 420 and the abutment surface 330. The abutting shaft 420 is clamped in the arc-shaped groove 511, the abutting area 330 between the abutting shaft 420 and the eccentric gear 510 is enlarged, and the abutting position between the eccentric gear 510 and the abutting shaft 420 is favorably fixed, so that the abutting position between the abutting shaft 420 and the abutting surface 330 is better positioned. Furthermore, the two arc grooves 511 are connected by an arc surface, so that the eccentric gear 510 rotates more smoothly, the operation convenience is improved, and the noise generated in the operation process is reduced. It is conceivable that the circumferential surface of the eccentric gear 510 may be provided in a stepped tooth manner, or a positioning protrusion may be provided on the circumferential surface of the eccentric gear 510 to position the abutting position of the abutting shaft 420 and the abutting surface 330. The embodiment adopts the arc-shaped groove 511, so that the abrasion of parts in the using process can be reduced, the service life is prolonged, and the maintenance cost is reduced.

In some embodiments of the present invention, as shown in fig. 3, the adjusting device 500 includes a knob 520 and two pulling wires, the eccentric gear 510 is rotatably connected to the connecting shaft 320, and the knob 520 controls the eccentric gear 510 to rotate through the two pulling wires to adjust the abutting position of the abutting shaft 420 and the abutting surface 330. The eccentric gear 510 is rotatably connected with the connecting shaft 320, the eccentric gear 510 and the connecting shaft 320 are coaxially arranged, two pull wires are respectively connected with two ends of the eccentric gear 510, and when the pull wires are pulled to be retracted, the pull wires with the eccentric gear 510 rotate around the connecting shaft 320, so that the contact position of the eccentric gear 510 and the abutting shaft 420 is adjusted. By rotating the knob 520, the retraction of the two wires is controlled, and the forward rotation or the reverse rotation of the eccentric gear 510 is realized, so that the abutting position of the abutting shaft 420 and the abutting surface 330 is adjusted. It is conceivable that a rotary handle is also adopted, the eccentric gear 510 is fixedly connected with the connecting shaft 320, the eccentric gear 510 is coaxially arranged with the connecting shaft 320, the rotary handle is connected with the end of the connecting shaft 320 and extends out of the base 200, the eccentric gear 510 is driven to rotate by directly rotating the rotary handle, and the abutting position of the abutting shaft 420 and the abutting surface 330 is adjusted. The embodiment adopts a wire control mode, so that the installation position of the knob 520 can be conveniently adjusted, and the convenience of operation is improved.

In some embodiments of the present invention, as shown in fig. 4 and 5, the knob 520 includes an outer cover 521, a wire drum 522, a driving gear 523 and a driven gear 524, the outer cover 521 and the wire drum 522 are respectively rotatably connected to the base 200, the driving gear 523 is connected to the outer cover 521, the driven gear 524 is connected to the wire drum 522, the driving gear 523 is engaged with the driven gear 524 to enable the outer cover 521 to drive the wire drum 522 to rotate, one ends of the two pull wires far away from the eccentric gear 510 are connected to the wire drum 522, and the wire drum 522 is used to control the retraction of the pull wires to control the rotation of the eccentric gear 510. The knob 520 rotates to drive the driving gear 523 to rotate, and the driving gear 523 drives the driven gear 524 to rotate, so that the driven gear 524 is driven. Through the mode of gear drive, realize knob 520 to the rotation control of eccentric gear 510, more save power, improve the convenience of operation. It can be understood that when the number of the driven gears 524 is multiple, for example, the number of the driven gears 524 is three, and the driven gears 524 are uniformly distributed around the driving gear 523, when the driving gear 523 rotates, the three driven gears 524 are driven to rotate at the same time, so that the rotating force can be further saved, and the operation convenience can be improved.

In some embodiments of the present invention, as shown in fig. 2, the adjusting device 500 includes a wire connection member 530, the wire connection member 530 is provided with a wire slot 531, one side of the eccentric gear 510 away from the abutting shaft 420 is fixedly connected to the wire connection member 530, the wire slot 531 is provided on one side of the wire connection member 530 away from the eccentric gear 510, one ends of two pulling wires away from the knob 520 are respectively connected to two ends of the wire connection member 530, and the pulling wires abut against a slot wall of the wire slot 531. Through installing wiring piece 530 additional, act as go-between and wiring groove 531 butt to the fixed installation route of acting as go-between in eccentric gear 510 junction makes the application of force more effective, improves the operation convenience.

In some embodiments of the present invention, the number of the abutting surfaces 330, the reset unit 410 and the eccentric gears 510 is two, and the two abutting surfaces 330, the two reset units 410 and the two eccentric gears 510 are symmetrically disposed to abut both ends of the shaft 420. Due to the arrangement, the chair back is stressed more uniformly, the use comfort is improved, and the service life is prolonged.

In some embodiments of the present invention, as shown in fig. 2, the adjusting device 500 includes a linkage shaft 540, the linkage shaft 540 is a hollow structure, and is sleeved outside the connecting shaft 320 and is coaxially disposed with the connecting shaft 320, and two ends of the linkage shaft 540 are respectively connected to the two eccentric gears 510 to realize linkage of the two eccentric gears 510. The linkage shaft 540 is additionally arranged, so that the two eccentric gears 510 can be ensured to rotate synchronously.

In some embodiments of the present invention, as shown in fig. 6 and 7, the reset unit 410 includes a rotating shaft 411, a sleeve 412, a connecting member 413, and a compression spring 414, wherein the rotating shaft 411 is rotatably connected to the base 200, one end of the sleeve 412 is fixedly connected to the rotating shaft 411, one end of the connecting member 413 abuts against an inner wall of the sleeve 412 and is disposed at one end of the sleeve 412 away from the rotating shaft 411, one end of the connecting member 413 away from the sleeve 412 is rotatably connected to the abutting shaft 420, the compression spring 414 is sleeved outside the sleeve 412 and the connecting member 413, one end of the compression spring 414 is connected to the sleeve 412, and one end of the compression spring 414 away from the sleeve 412 is connected to the connecting member 413. When a person leans against the back of the chair, the abutting surface 330 exerts a pushing force on the abutting shaft 420, the abutting shaft 420 pushes the connecting member 413, so that the connecting member 413 moves towards the inside of the sleeve 412, meanwhile, the connecting member 413 exerts a pushing force towards the rotating shaft 411 on the compression spring 414, and the compression spring 414 exerts an opposite restoring force on the connecting member 413, thereby realizing that a restoring force is exerted on the back of the chair. So set up, simple structure is convenient for maintain.

It is conceivable that when the number of the abutting surfaces 330 is two, the abutting surfaces 330 are symmetrically disposed on two sides of the abutting shaft 420, and accordingly, the number of the sleeves 412, the connecting members 413 and the compression springs 414 is also two, and the sleeves 412 are symmetrically disposed on two sides of the rotating shaft 411, so that the stress on the chair back is more uniform, the use comfort is improved, and the service life is prolonged. It will be appreciated that the number of eccentric gears 510 is also two, which also results in a smoother adjustment and more uniform force applied to the abutment shaft 420.

In some embodiments of the present invention, as shown in fig. 7, the connection piece 413 includes an abutting rod 415 and a rotation block 416, one end of the abutting rod 415 abuts against an inner wall of the sleeve 412, one end of the abutting rod 415 far away from the sleeve 412 is fixedly connected to the rotation block 416, the rotation block 416 is provided with a rotation groove 417, the rotation groove 417 is disposed at one end of the rotation block 416 far away from the abutting rod 415, the abutting shaft 420 includes a rotation rod 421 and a positioning block 422, the rotation rod 421 is disposed through two sidewalls of the rotation groove 417 and is rotatably connected to the rotation groove 417, the positioning block 422 is fixedly sleeved on the rotation rod 421 and is disposed in the rotation groove 417 for positioning a position of the rotation block 416, and the positioning block 422 abuts against the abutting surface 330. When the abutting shaft 420 moves, the rotating block 416 is driven to rotate around the rotating rod 421, and the sleeve 412 is driven to rotate around the rotating shaft 411, so that the adjustment is smoother, and the operation convenience is improved. It can be understood that the positioning block 422 is made of plastic, and when the positioning block 422 contacts the abutting surface 330, noise generated during the adjustment process can be reduced. It is contemplated that the abutment surface 330 is made of plastic, which reduces noise generated during adjustment.

A seat according to an embodiment of the second aspect of the utility model comprises: a seat pan 100 and a seat back according to an embodiment of the first aspect of the utility model. The chair back is arranged on the connecting seat and is arranged at one end of the connecting seat far away from the abutting surface.

In the seat according to the second aspect of the present invention, the abutting shaft 420 is clamped between the eccentric gear 510 and the abutting surface 330, and by rotating the eccentric gear 510, the abutting position between the abutting shaft 420 and the abutting surface 330 is adjusted by utilizing the difference in the distance from each position of the circumferential surface of the eccentric gear 510 to the axial center, so as to adjust the force arm of the seat back, and further adjust the tilt angle of the seat back and the return force of the seat back. Therefore, the present invention provides a seat, and by using the seat base 100 according to the embodiment of the first aspect of the present invention, the adjustment structure for the tilt angle of the seat back and the return force of the seat back is optimized, so as to improve the convenience of adjustment.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A seat pan, comprising:

a base;

the connecting device comprises a connecting seat and a connecting shaft; the connecting shaft is fixedly connected with the base, and the connecting seat is rotatably connected with the connecting shaft; the connecting seat is used for connecting the chair back; the connecting seat is provided with an abutting surface which is arranged on one side of the connecting seat, which is far away from the chair back;

the reset device comprises a reset unit and an abutting shaft; the reset unit is rotatably connected with the base and is used for applying reset force to the butting shaft; the abutting shaft abuts against the abutting surface;

the adjusting device comprises an eccentric gear; the eccentric gear is connected with the connecting shaft;

wherein one side of the abutting surface, which is far away from the chair back, extends obliquely to the direction of the reset unit; the circumferential surface of the eccentric gear is abutted to the abutting shaft so as to adjust the abutting position of the abutting shaft and the abutting surface.

2. The seat pan of claim 1, wherein the eccentric gear is provided with a plurality of arcuate grooves; the arc-shaped groove is abutted to the abutting shaft and used for positioning the abutting position of the abutting shaft and the abutting surface.

3. The seat pan of claim 1, wherein the adjustment device comprises a knob and two pull wires; the eccentric gear is rotationally connected with the connecting shaft; the knob controls the eccentric gear to rotate through the two pull wires so as to adjust the abutting position of the abutting shaft and the abutting surface.

4. The seat pan of claim 3, wherein the knob includes an outer cover, a spool, a drive gear, and a driven gear; the outer cover and the wire barrel are respectively and rotatably connected with the base; the driving gear is connected with the outer cover, and the driven gear is connected with the bobbin; the driving gear is meshed with the driven gear so as to realize that the outer cover drives the wire barrel to rotate; one ends of the two pull wires, which are far away from the eccentric gear, are connected with the wire barrel; the wire barrel is used for controlling the retraction of the pull wire so as to control the rotation of the eccentric gear.

5. A seat pan according to claim 3, wherein the adjustment means comprises a wiring member provided with a wire slot; one side of the eccentric gear, which is far away from the butting shaft, is fixedly connected with the wiring piece; the wire groove is arranged on one side of the wiring piece, which is far away from the eccentric gear; one ends of the two pull wires, which are far away from the knob, are respectively connected with two ends of the wiring piece; the stay wire is abutted against the groove wall of the wire groove.

6. The seat pan of claim 1, wherein the number of the abutment surface, the reset unit, and the eccentric gear is two; the two abutting surfaces, the two reset units and the two eccentric gears are symmetrically provided with two ends of the abutting shaft.

7. The seat pan of claim 6, wherein the adjustment device comprises a linkage shaft; the linkage shaft is of a hollow structure, is sleeved outside the connecting shaft and is coaxially arranged with the connecting shaft; two ends of the linkage shaft are respectively connected with the two eccentric gears to realize linkage of the two eccentric gears.

8. The seat pan of claim 1, wherein the reset unit comprises a rotating shaft, a sleeve, a connecting member and a compression spring; the rotating shaft is rotatably connected with the base; one end of the sleeve is fixedly connected with the rotating shaft; one end of the connecting piece is abutted against the inner wall of the sleeve and is arranged at one end of the sleeve far away from the rotating shaft; one end of the connecting piece, which is far away from the sleeve, is rotatably connected with the abutting shaft; the compression spring is sleeved outside the sleeve and the connecting piece; one end of the compression spring is connected with the sleeve, and one end of the compression spring, which is far away from the sleeve, is connected with the connecting piece.

9. The seat pan of claim 8, wherein the connector comprises an abutment bar and a pivot block; one end of the abutting rod abuts against the inner wall of the sleeve, and the end far away from the sleeve is fixedly connected with the rotating block; the rotating block is provided with a rotating groove; the rotating groove is arranged at one end of the rotating block, which is far away from the abutting rod; the abutting shaft comprises a rotating rod and a positioning block; the rotating rods penetrate through the two side walls of the rotating groove and are rotatably connected with the rotating groove; the positioning block is fixedly sleeved on the rotating rod and arranged in the rotating groove and used for positioning the position of the rotating block; the positioning block is abutted against the abutting surface.

10. A seat, comprising:

the seat pan of any of claims 1 to 9;

the chair back is arranged on the connecting seat and is arranged at one end, far away from the abutting surface, of the connecting seat.