CN106913100A - Seat chassis with inclination and elevation force adjusting device - Google Patents

Abstract

A seat chassis with a tilting force adjusting device, comprising a seat shell and a tilting force adjusting device, the tilting force adjusting device comprising an elastic pressure block, an elastic sheet, a rotating shaft, a retaining ring, a slider, a screw, and a pinion , an adjustment rod, a large gear and a backrest connecting piece, the seat shell and the backrest connecting piece are connected by a rotating shaft and fixed by a circlip, and the elastic pressing blocks are respectively fixed at both ends of the elastic piece, and the two ends of the elastic piece are respectively connected to the seat Shell and backrest connector, the present invention designs a chassis with tilting function through the principle of leverage, and at the same time realizes the adjustment of tilting force by adjusting the pretightening force of the end point, which can make the backrest of the office chair have a tilting function, and can The supporting force of the backrest on the user's back during the process of adjusting the reclining of the office chair meets the needs of users of different sizes, and has the characteristics of simple structure, low manufacturing cost and good effect.

Description

Seat chassis with reclining force adjustment device

technical field

The invention belongs to the field of office supplies and furniture, and in particular relates to a seat chassis with a reclining force adjustment device which is used in office chairs or resting at home, and whose backrest supporting force can be adjusted.

Background technique

At present, the working hours of office workers are generally more than eight hours, and about 60% of office workers spend their time on chairs every day. Due to sedentary, unhealthy seats and incorrect sitting postures, 75% of office Seat users suffer from cervical spondylosis, lumbar disc herniation, scoliosis, chest and back pain and other diseases to varying degrees. With the advancement of technology and the improvement of people's living standards, healthy life has gradually become the focus of people's attention. Mechanical office chairs can effectively reduce the probability of suffering from the above diseases, so healthy and comfortable office chairs are particularly important for office workers. Although the traditional office chair chassis on the market can realize the tilting function of the backrest, it does not take into account that users of different sizes have different needs for backrest support. If a constant support force is used, it may be possible for smaller users Users feel that the support force of the backrest is too large to lean on, while larger users feel that the support force of the backrest is too small and the support force is not enough.

Contents of the invention

In view of the above-mentioned defects and problems of the prior art, the technical problem to be solved by the present invention is to provide a seat chassis with a reclining force adjustment device, which has a simple structure and low manufacturing cost.

In order to achieve the above object, the present invention provides the following technical solutions:

A seat chassis with a reclining force adjusting device, comprising a seat shell and a reclining force adjusting device, the reclining force adjusting device comprising an elastic pressure block, an elastic sheet, a rotating shaft, a retaining ring, a slider, a screw, and a pinion , an adjustment rod, a large gear and a backrest connector, the seat shell and the backrest connector are connected by a rotating shaft and fixed by a circlip; Shell and backrest connector, the pinion is fixed on the screw, the large gear is fixed on the adjustment rod, the large gear and the small gear are toothed, the slider is screwed to the screw, and the elastic pressure block is closely attached to the slider combine.

In the above technical solution, the sliding block and the elastic pressing block are provided with slopes respectively, and the angle of the slope of the sliding block is consistent with the angle of the slope of the elastic pressing block.

In the above technical solution, the internal thread provided on the slider matches the external thread provided on the screw, and when the screw rotates, the slide block can be moved.

In the above technical solution, the adjusting rod is provided with a knob, and the adjusting rod positioning part fixes the adjusting rod on the seat shell.

In the above technical solution, the seat shell is provided with a fulcrum, and the fulcrum and the elastic sheet form a lever mechanism.

The present invention designs a chassis with a tilting function through the principle of leverage, and at the same time realizes the adjustment of the tilting force by adjusting the pretightening force of the end point, which can make the backrest of the office chair have a tilting function, and can adjust the tilting process of the office chair The supporting force of the middle backrest on the user's back meets the use requirements of users of different body types, and has the characteristics of simple structure, low manufacturing cost and good effect.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic structural diagram of a top view of a tilting force adjusting device of the present invention.

Fig. 2 is a structural schematic diagram of the bottom view of the reclining force adjusting device of the present invention.

Among them: 1. Seat shell; 2. Elastic pressure block; 3. Elastic sheet; 4. Rotating shaft; 5. Spring; 6. Backrest connector; 7. Slider; 8. Screw; 9. Pinion; 10. Adjustment Rod; 11, adjusting rod locator; 12, large gear.

detailed description

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

According to FIG. 1 and FIG. 2 , a seat chassis with a reclining force adjusting device shown as an embodiment includes a seat shell and a reclining force adjusting device.

The reclining force adjustment device includes an elastic pressing block, an elastic sheet, a rotating shaft, a circlip, a slider, a screw, a pinion, an adjustment rod, a large gear and a backrest connector. The elastic sheet is made of glass fiber material, and the elastic pressing block It is a glass fiber sheet provided with a slope, and the slide block is also provided with a slope, and the slope angle of the slide block is consistent with the slope angle of the elastic pressing block.

The seat shell and the backrest connecting piece are connected by a rotating shaft and then fixed by a circlip. The seat shell and the backrest connecting piece are made of nylon. The function of the backrest connecting piece is to provide mounting holes for the backrest installation so that the backrest can rotate around the rotating shaft, For the function of reclining backward, the seat shell and the backrest connecting piece are connected by a rotating shaft and fixed with a circlip, and the backrest connecting piece rotates around the rotating shaft to realize the tilting of the backrest of the office chair.

The seat shell is provided with a fulcrum, the middle section of the elastic piece is arranged on the fulcrum, the fulcrum and the elastic piece form a lever mechanism, and the elastic action of the elastic piece can make the backrest tilted backward return to the initial position.

The elastic pressing block is two pieces, and the two elastic pressing blocks are respectively fixed at both ends of the elastic sheet, and the two ends of the elastic sheet are respectively connected to the seat shell and the backrest connector, and the fixed point on the seat shell to fix one end of the elastic sheet is adjustable and fixed. Point, the fixed point of one end of the fixed elastic sheet on the backrest connector is a non-adjustable fixed point. After the elastic sheet is installed, the elastic pressure block is locked on the backrest connector by screws, and finally the purpose of fixing the elastic sheet is achieved.

The large gear is fixed on the adjusting rod by a screw, and the adjusting rod positioning part fixes the adjusting rod on the seat shell. The adjusting rod is provided with a knob, and the knob is rotated to drive the large gear to rotate. When the gear rotates, the pinion is fixed on the screw by screws, and the rotation of the pinion drives the screw to start to rotate. The internal thread set by the slider matches the external thread set by the screw, and the screw connection between the slider and the screw. The slope angle is consistent with the slope angle of the elastic pressure block, so the elastic pressure block and the slider are closely attached. When the screw rotates, the slider can be moved. When the slider moves, a force is applied to the elastic pressure block. An adjustable pre-tightening force is formed on the sheet: when the elastic pressing block is pressed down, the pre-tightening force increases, and the supporting force of the backrest becomes larger, which is suitable for larger users; when the elastic pressing block rises, the pre-tightening force The smaller the size, the smaller the supporting force of the backrest, which is suitable for smaller users.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (5)

1. A seat chassis with a reclining force adjusting device, characterized in that: it comprises a seat shell and a reclining force regulating device, and the reclining force regulating device comprises an elastic pressing block, an elastic sheet, a rotating shaft, a retaining ring, a slide block, screw, pinion, adjusting rod, large gear and backrest connecting piece, the seat shell and backrest connecting piece are connected by a rotating shaft and fixed by a circlip, and the elastic pressing blocks are respectively fixed on both ends of the elastic sheet, and the elastic The two ends of the piece are respectively connected to the seat shell and the backrest connector, the pinion is fixed on the screw, the large gear is fixed on the adjustment rod, the large gear and the small gear are tooth-connected, the slider is screwed to the screw, elastically pressed The block fits snugly against the slider. 2. A seat chassis with a reclining force adjustment device according to claim 1, characterized in that: the slider and the elastic pressure block are provided with slopes respectively, and the angle of the slope of the slider is the same as the angle of the slope of the elastic pressure block. unanimous. 3. A seat chassis with a reclining force adjustment device according to claim 2, characterized in that: the internal thread provided on the slider matches the external thread provided on the screw, and when the screw rotates, the sliding Blocks move. 4. A seat chassis with a reclining force adjustment device according to claim 1, characterized in that: the adjusting rod is provided with a knob, and the adjusting rod positioning part fixes the adjusting rod on the seat shell. 5. A seat chassis with a reclining force adjustment device according to claim 1, characterized in that: the seat shell is provided with a fulcrum, and the fulcrum and the elastic piece form a lever mechanism.