CN115919097A - Seat chassis - Google Patents

Abstract

The invention discloses a seat chassis which comprises a seat back fixing frame, a base, a movable disc, a main spring and an adjusting handle, wherein the seat back fixing frame is used for fixing a seat back, the main spring is arranged below the base and used for controlling the inclination force of the seat back fixing frame and promoting the seat back to recover the original position, the seat chassis also comprises a hinged frame, the upper end of the hinged frame is abutted against the bottom surface of the movable disc, the hinged frame moves downwards relative to the base and drives the movable disc to overturn for a certain angle relative to the base, and meanwhile, the main spring is compressed, and when the seat back is arranged on the seat back fixing frame, the seat back can follow the action of the back of a person through the left-right swinging and up-down swinging of the back of the person, and can be tightly attached to the back of the person, so that the support of various sitting postures is provided, and the comfort of the seat is improved.

Description

Seat chassis

Technical Field

The invention relates to a furniture accessory, in particular to a seat chassis.

Background

The back of the chair on the market, it is generally fixed with the chassis, through operating handle adjustment, the adjustment of the compressive force of realization to the chassis spring, thereby can adjust the height of seat and the gradient of back of the chair, but can not realize the left and right sides slope of back of the chair, can not satisfy office staff front and back about the wrench movement when the health, back of the chair only pastes tightly with the health, the back of the chair is as the support of backbone, so need a back of the chair can be around, the chair of horizontal hunting, no matter the people who sits on the chair do any wrench movement, the back of the chair if can paste tight people's back, can improve the person's of sitting comfort degree, and improve office chair's grade.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a seat chassis capable of swinging a seat back forwards, backwards, leftwards and rightwards.

The purpose of the invention is realized by the following technical scheme:

a seat chassis comprises a seat back fixing frame, a base, a movable disc, a main spring and an adjusting handle, wherein the seat back fixing frame is used for fixing a seat back, the main spring is arranged below the base, the main spring controls the inclination force of the seat back fixing frame and enables the seat back to recover the original position, the seat chassis also comprises a hinged frame, one end of the hinged frame is hinged with the base, the other end of the hinged frame protrudes out of the edge of the base, a middle shaft is fixed on the axis of the hinged frame, the seat back fixing frame is installed on the middle shaft through a rolling bearing, the left side and the right side of one end of the hinged frame, which protrudes out of the edge of the base, are provided with sub springs, and spring seats of the sub springs are respectively arranged on the hinged frame or/and two sides of the seat back fixing frame; the movable disc floats in the base top, the upper end of articulated frame and the bottom surface butt of movable disc, articulated frame for the base moves down to order about the movable disc for the certain angle of base upset, compress main spring simultaneously.

As a further improvement of the scheme, the device also comprises a supporting lug hinged with the hinged frame, and a hinged point between the hinged frame and the supporting lug is arranged at one end of the protruding base.

In a further improvement of the above, the hinge frame has a reverse-L-shaped side, hinge points of the base, the supporting lug and the hinge frame are respectively located at two ends of an upper side of the reverse-L-shaped side, and an uppermost edge of the supporting lug is fixedly connected to a bottom of the movable plate.

As a further improvement of the above solution, the supporting lug is located outside the hinge bracket, and the free end of the supporting lug is provided with an avoiding hole for passing through the adjusting handle.

Preferably, the rolling bearing protrudes out of the edge of the hinged frame, the chair back fixing frame is provided with a mounting hole of the rolling bearing, a bearing sleeve is arranged below the mounting hole, and the bearing sleeve is used for fixing the rolling bearing and locking the sub spring in the spring seat.

Preferably, the base is further fixed with a gear rod for controlling the inclination angle of the movable disc, and the gear rod is provided with a plurality of parallel clamping grooves from high to low.

Preferably, the movable plate fixes a valve rod which penetrates through the main spring, and the bottom surface of the valve rod is larger than the diameter of the main spring.

Preferably, the inner surface of the needle bearing is provided with evenly distributed needle rollers.

Compared with the prior art, the invention has the following advantages and effects:

1. when the back of a person moves left and right, the chair back swings left and right, the rolling bearing rotates on the middle shaft through the swing of the chair back fixing frame, and the sub spring is compressed to impel the chair back to return to the initial position; when a person leans backwards, the chair back drives the chair back fixing frame to tilt backwards, the hinged frame drives the movable disc to press downwards through the force of the rolling bearing and the middle shaft, and a certain angle is formed between the hinged frame and the base, so that the main spring is compressed, the chair back is tilted, the chair back can swing left and right and tilt up and down simultaneously, and the comfort level of the seated person is improved.

2. Articulated frame forms triangle-shaped with the fixed point of first pin joint, second pin joint, support lug and activity dish, and the three can increase the overall stability of the fixed 1 of the back of the chair, and the rotation angle of activity dish = the rotation angle at the relative articulated frame rotation degree of support lug 11 + the relative end of articulated frame to improve the inclination of the back of the chair, improve the travelling comfort more.

3. The bearing sleeve can be locked on the rolling bearing and the sub-spring, so that the whole structure is simplified, and the disassembly is convenient.

Drawings

Fig. 1 is a perspective view of a seat pan.

Fig. 2 is an exploded view of the seat pan.

Fig. 3 is a plan view of the seat pan (with the movable tray omitted).

Fig. 4 is a side view of fig. 3.

Fig. 5 is a side view of the chair back holder.

Wherein, 1-the chair back fixing frame; 2-a base; 3-a movable disc; 4-adjusting the handle; 5-a spring sleeve; 6-a hinged frame; 7-the middle axis; 8-rolling bearings; 9-a sub-spring; 10-a spring seat; 11-a support lug; 12-a bearing sleeve; 13-gear lever; 14-a card slot; 15-bolt; 16-a gasket; 17-a screw; 18-rolling needles; 19-avoiding holes; 20-upper edge; 21-a first hinge point; 22-second hinge point.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the embodiments of the present invention are not limited thereto.

Referring to fig. 1-4, a seat chassis comprises a seat back fixing frame 1, a base 2, a movable disc 3, a main spring and an adjusting handle 4, wherein the seat back fixing frame 1 is used for fixing a seat back, a mounting hole for fixing the seat back is formed in the seat back fixing frame 1, the main spring is arranged below the base 2 and is installed in a spring sleeve 5, when the seat back inclines, the movable disc 3 can compress the main spring, and the main spring controls the inclination force of the seat back fixing frame 1 and enables the seat back to recover the original position. In order to facilitate the installation of the chair back fixing frame 1, the device also comprises a hinged frame 6, one end of the hinged frame 6 is hinged with the base 2, the other end of the hinged frame protrudes out of the edge of the base 2, a middle shaft 7 is fixed on the axis of the hinged frame 6, the chair back fixing frame 1 is installed on the middle shaft 7 through a rolling bearing 8, the left side and the right side of the end, protruding out of the edge of the base 2, of the hinged frame 6 are both provided with sub-springs 9, the two sides of the hinged frame 6 or/and the chair back fixing frame 1 are respectively provided with spring seats 10 of the sub-springs 9, when the chair back fixing frame 1 is installed on the hinged frame 6, the sub-springs 9 are locked between the spring seats 10, the chair back fixing frame 1 can swing left and right on the middle shaft 7 and returns to an initial position (horizontal position) through the sub-springs 9; the utility model discloses a chair back, including base 2, articulated frame 3, antifriction bearing 8, axis 7, main spring, movable disc 3 floats in base 2 top, the upper end of articulated frame 6 and the bottom surface butt of movable disc 3 make articulated frame 6 push down through the power of borrowing of antifriction bearing 8 and axis 7 when the back of the chair mount pushes down to drive movable disc 3 and deflect an angle downwards, compress main spring, realize the slope of the back of the chair, when the back of the chair initial position is replied to needs, main spring orders about movable disc 3 and resumes horizontal position. In conclusion, when the back of a person moves left and right, the chair back swings left and right, the rolling bearing 8 rotates on the middle shaft 7 through the swing of the chair back fixing frame 1, the sub spring 9 is compressed, and the sub spring 9 prompts the chair back to return to the initial position; when a person leans backwards, the chair back drives the chair back fixing frame 1 to tilt backwards, the hinged frame 6 drives the movable disc 3 to press downwards through the aid of the rolling bearing 8 and the middle shaft 7, and a certain angle is formed between the movable disc and the base 2, so that the main spring is compressed, the chair back is tilted, and the chair back can swing left and right and tilt up and down simultaneously.

In order to make the angle of the swinging of the chair back larger, the chair chassis also comprises a supporting lug 11 which is hinged with the hinged frame 6, the hinged point of the hinged frame 6 and the supporting lug 11 is arranged at one end of the protruding base 2, and the supporting lug 11 is hinged with the base 2 through a bolt 15 and a gasket 16. The hinge frame 6 has a reverse-L-shaped side, hinge points of the base 2, the support lug 11 and the hinge frame 6 are respectively located at both ends of an upper side of the reverse-L-shaped side, and an upper edge 20 of the support lug 11 is fixedly connected to a bottom of the movable plate 3. On the one hand, so articulated frame 6 and the first pin joint 21 of base 2, articulated frame 6 and the second pin joint 22 of supporting lug 11, the fixed point of supporting lug 11 and activity dish 3 forms triangle-shaped, the three can increase the overall stability of back of the chair mount 1, on the other hand, when the back of the chair pushes down, back of the chair mount 1 pushes down, it is rotatory that supporting lug 11 is articulated frame 6 relatively, and hold activity dish 3, the rotation angle of activity dish 3 = the rotation angle of supporting lug 11 relative articulated frame 6 rotation degree + the relative end 2 of articulated frame 6, thereby improve the inclination of the back of the chair, further improve the chair travelling comfort.

In order to be able to avoid excessive swinging of the free end of the supporting lug 11, said supporting lug 11 is located outside the articulated frame 6, the free end of the supporting lug 11 is provided with an escape hole 19 for passing through the adjustment handle 4, and when the supporting lug 11 swings, its free end moves within the aperture of the escape hole 19.

Referring to fig. 5, another simplified structure of the seat chassis has the function that the rolling bearing 8 protrudes out of the edge of the hinge frame 6, the seat back fixing frame 1 is provided with a mounting hole for the rolling bearing 8, a bearing sleeve 12 is arranged below the mounting hole, and the bearing sleeve 12 is used for fixing the rolling bearing and simultaneously locking the sub-spring 9 in the spring seat, so that the bearing sleeve 12 can be locked on the rolling bearing 8 and the sub-spring 9. When the sub-spring 9 or the rolling bearing 8 needs to be dismounted, the screw 17 below the bearing sleeve 12 can be dismounted.

In order to adapt to different demands of different crowds on the inclination angle of the chair back, the base 2 is also fixed with a gear rod 13 for controlling the inclination angle of the movable plate 3, and the gear rod 13 is provided with a plurality of clamping grooves 14 in parallel from high to low.

The valve rod that passes main spring is fixed to the activity dish, and the diameter of main spring is greatly crossed to the bottom surface of valve rod, and when activity dish 3 pushed down, the other end of activity dish 3 pulled down the valve rod, and the bottom surface compression main spring of valve rod.

In order to control the left-right swinging angle of the chair back and realize the stepped swinging, the rolling bearing 8 is a needle bearing, and the inner surface of the needle bearing is provided with evenly distributed needle rollers 18.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (8)

1. A seat chassis comprises a seat back fixing frame, a base, a movable disc, a main spring and an adjusting handle, wherein the seat back fixing frame is used for fixing a seat back, the main spring is arranged below the base, and the main spring controls the inclination force of the seat back fixing frame and enables the seat back to recover the original position; the movable disc floats in the base top, the upper end of articulated frame and the bottom surface butt of movable disc, articulated frame for the base moves down to order about the movable disc for the certain angle of base upset, compress main spring simultaneously.

2. The seat pan of claim 1, further comprising a support lug hingedly connected to the hinge bracket, wherein a hinge point between the hinge bracket and the support lug is provided at one end of the protruding base.

3. The seat chassis of claim 2, wherein the hinge frame has a reverse-L-shaped side, hinge points of the base, the supporting lug and the hinge frame are respectively located at two ends of an upper side of the reverse-L-shaped side, and an uppermost edge of the supporting lug is fixedly connected to a bottom of the movable plate.

4. A seat pan according to claim 3, characterised in that the support lug is located on the outside of the hinge bracket, the free end of the support lug being provided with an escape hole for passing through the adjustment handle.

5. The seat chassis of claim 1, wherein the rolling bearing protrudes out of the edge of the hinge bracket, the seat back fixing bracket is provided with a mounting hole of the rolling bearing, and a bearing sleeve is arranged below the mounting hole and used for fixing the rolling bearing and locking the sub spring in the spring seat.

6. The seat chassis of claim 1, wherein the base further fixes a shift lever for controlling the inclination angle of the movable plate, and the shift lever is provided with a plurality of parallel slots from high to low.

7. The seat pan of claim 1, wherein the movable plate holds a valve stem that passes through the main spring, the bottom surface of the valve stem being larger than the diameter of the main spring.

8. The seat pan of claim 1, wherein the rolling bearing is a needle bearing having an inner surface provided with evenly distributed needles.

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