Seat angle adjustment device and seat

Abstract

The present invention provides a seat angle adjustment device, comprising a connecting part and an adjustment base, wherein the adjustment base has a columnar cavity, the adjustment base is arranged below the seat cushion of the seat, the connecting part is arranged in the cavity, and an elastic buffer is filled between the connecting part and the adjustment base, and a limiting protrusion arranged along the connecting part or along the circumference of the adjustment base is also provided between the connecting part and the adjustment base, the length of the limiting protrusion is less than the distance between the connecting part and the adjustment base, and the connecting part of the seat is connected to the supporting foot of the seat. The present invention provides a seat angle adjustment device and a seat with a simple structure, a long service life, and the ability to achieve multi-directional tilt angle adjustment.

Description

Technical Field

[0001] The invention relates to the field of seats, and in particular to a seat angle adjustment device for seats. Background Art

[0002] Chairs are essential for modern work and life. For most people, the time spent sitting in a chair occupies the vast majority of the day. However, the negative impact of long-term sitting on the human body is also increasing, especially when sitting in the same posture for a long time. This negative impact on the human body is particularly obvious. In the case that it is impossible to change the fact that people need to sit for a long time, how to alleviate or reduce the harm of long-term sitting to the human body has become the direction of chair research and development. At present, office chairs basically have the function of height and angle adjustment, so that people can change their sitting posture and relieve the fatigue of sitting in a single posture for a long time. The methods of achieving seat height adjustment are relatively simple and mature, but there is no good solution to how to adjust the seat inclination while ensuring the life of the seat and the convenience of adjustment. Summary of the invention

[0003] The main purpose of the present invention is to provide a seat angle adjustment device, aiming to solve the problem of short service life of the current seat angle adjustment device.

[0004] To achieve the above-mentioned purpose, the seat angle adjustment device proposed in the present invention includes a connecting part and an adjustment base; the adjustment base is arranged under the seat cushion of the seat and has a columnar cavity; the connecting part is arranged in the columnar cavity, used to be connected to the support column of the seat, and an elastic buffer body is filled between the connecting part and the adjustment base; the adjustment base is provided with a limiting protrusion protruding into the columnar cavity, and the elastic buffer body is provided with an avoidance position, and the avoidance position is used for the limiting protrusion to be embedded; the limiting protrusion is an annular protrusion or a plurality of tooth-like protrusions evenly arranged in a ring shape; the protruding height of the limiting protrusion is less than the distance between the connecting part and the adjustment base.

[0005] Preferably, the limiting protrusion is arranged close to the upper end and / or the lower end of the columnar cavity.

[0006] Preferably, the columnar cavity is in the shape of an elliptical cylinder.

[0007] Preferably, the limiting protrusion is embedded in one side of the elastic buffer body.

[0008] Preferably, the protruding height of the annular protrusion or the tooth-shaped protrusion in the first direction is smaller than the protruding height in the second direction perpendicular to the first direction; or, the spacing between the tooth-shaped protrusions in the first direction is larger than the spacing between the tooth-shaped protrusions in the second direction.

[0009] The present invention also proposes another seat angle adjustment device, including a connecting part and an adjustment base; the adjustment base is arranged under the seat cushion of the seat, and has a columnar cavity; the connecting part is arranged in the columnar cavity, for connecting to the support column of the seat, and an elastic buffer body is filled between the connecting part and the adjustment base; the connecting part is provided with a limiting protrusion protruding outward, and the elastic buffer body is provided with an avoidance position, and the avoidance position is used for the limiting protrusion to be embedded; the limiting protrusion is an annular protrusion or a plurality of tooth-like protrusions evenly arranged in a ring shape; the protruding height of the limiting protrusion is less than the distance between the connecting part and the adjustment base.

[0010] Preferably, the limiting protrusion is arranged close to the upper end and / or the lower end of the connecting portion.

[0011] Preferably, the elastic buffer body is made of rubber material.

[0012] The present invention also provides another seat, comprising the above-mentioned seat angle adjustment device.

[0013] The technical solution of the present invention fills an elastic buffer body between the adjustment base and the connecting part, and sets a limiting protrusion to limit the maximum inclination angle of the adjustment base, thereby reducing the deformation of the elastic buffer body when the seat angle changes, alleviating damage to the elastic buffer body, and extending the service life of the seat angle adjustment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of an embodiment of a seat angle adjustment device of the present invention;

[0016] Figure 2 This is a schematic structural diagram of an adjusting base of a seat angle adjusting device according to an embodiment of the present invention;

[0017] Figure 3 A schematic structural diagram of an elastic buffer body of an embodiment of a seat angle adjustment device of the present invention;

[0018] Figure 4 This is a schematic structural diagram of an adjusting base of another embodiment of a seat angle adjusting device of the present invention;

[0019] Figure 5 It is a schematic diagram of the structure of an elastic buffer body of another embodiment of the seat angle adjustment device of the present invention;

[0020] Figure 6 It is a structural schematic diagram of the connection part of an embodiment of the seat angle adjustment device of the present invention;

[0021] Figure 7 A schematic top view of the structure of a connecting portion of another embodiment of a seat angle adjustment device of the present invention.

[0022] Description of Figure Numbers:

[0023]

[0024] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] In order to increase the comfort of the chair and reduce the damage to the human body caused by long-term sitting, office chairs usually adopt an adjustable tilt angle design, and the tilt angle of the chair can be adjusted according to needs. Chairs with angle adjustment devices usually use elastic buffers filled between the connection part and the adjustment base. The tilt angle of the chair is dynamically adjusted according to the different forces on the elastic buffer to better fit the force surface when people sit on the chair, thereby increasing the comfort of the chair.

[0029] The present invention provides a seat angle adjustment device and a seat using the seat angle adjustment device, wherein, please refer to Figures 1 to 7 The seat angle adjustment device includes an adjustment base 100, a connecting part 200, an elastic buffer body 300 and a limiting protrusion 400; the adjustment base 100 is hollow and has an annular first inner connecting surface 101, and the annular first inner connecting surface encloses a cylindrical cavity, and the adjustment base 100 is used to connect and support the seat surface of the seat; the connecting part 200 is used to connect the support column 500 of the seat and the adjustment base 100, and the connecting part 200 is annular and has a second inner connecting surface 201 and an outer connecting surface 202, and the second inner connecting surface 201 is used to connect the support column 500; the elastic buffer body 300 is annular and is embedded between the first inner connecting surface 101 and the outer connecting surface 202 in a manner that matches the first inner connecting surface 101 and the outer connecting surface 202; the limiting protrusion 400 is embedded in the elastic buffer body 300 to reduce the maximum deformation of the elastic buffer body 300.

[0030] The seat surface inclination angle is adjusted dynamically, and needs to have an elastic recovery function. The seat angle adjustment device provided by the present invention uses an elastic buffer body 300 as a component that provides elastic recovery force. Under the same force, the thicker the elastic buffer body 300 is, the greater its deformation is, the greater the change in the seat surface angle is, and the easier it is to adjust the seat surface angle.

[0031] In order to achieve the difference in seat inclination adjustment in different directions, in a specific embodiment, the columnar cavity is in the shape of an elliptical cylinder, and the major axis direction of the ellipse is the direction in which the seat swings forward and backward, and the minor axis direction of the ellipse is the direction in which the seat swings left and right, thereby achieving the effect that the maximum inclination angle of the seat swinging forward and backward is greater than the maximum inclination angle of its swinging left and right.

[0032] The seat angle adjustment device provided by the present invention is suitable for a seat with a single support column. The connecting part 200 is connected to the support column 500 of the seat, and the adjustment base 100 is connected to the seat surface of the seat. An elastic buffer body 300 is arranged between the rigid adjustment base 100 and the rigid connecting part 200. When the seat surface is subjected to an unbalanced top-down force, the seat surface will deflect, and the elastic buffer body 300 will be subjected to lateral pressure due to the deflection of the seat surface, thereby undergoing elastic deformation and generating an elastic restoring force.

[0033] The elastic buffer 300 is preferably made of rubber with a thickness between 5mm and 25mm. After the elastic buffer 300 has undergone multiple deformation recovery, especially multiple deformation recovery with a large deformation amount, its elastic deformation ability will weaken, so that it will eventually fail to recover normally after deformation. In order to delay the reduction of the elastic deformation ability of the elastic buffer 300, increase the number of its elastic deformations, and extend its service life, the present invention is provided with a limiting protrusion 400 arranged along the connecting portion 200 or along the circumference of the adjusting base 100 between the connecting portion 200 and the adjusting base 100, and the limiting protrusion 400 is embedded in the avoidance position 301 in the elastic buffer 300, and the avoidance position 301 can be a give-way hole or a give-way groove; when the elastic buffer 300 undergoes lateral deformation, the limiting protrusion 400 can reduce the maximum deformation amount of the elastic buffer 300 while ensuring the overall thickness of the elastic buffer 300, thereby reducing the damage to the elastic buffer 300 and extending its service life. The limiting protrusion 400 may be a ring-shaped protrusion or a plurality of tooth-shaped protrusions uniformly arranged in a ring shape.

[0034] In other embodiments using an annular protrusion, the protruding height of the annular limiting protrusion in the first direction is less than its protruding height in the second direction, wherein the first direction is the front-back swinging direction of the seat, and the second direction is the left-right swinging direction of the seat. In this embodiment, the limiting effect of the limiting protrusion 400 on the front-back swinging of the seat is less than the limiting effect on the left-right swinging of the seat, so that the maximum inclination angle of the seat in the front-back direction is greater than the maximum inclination angle in the left-right direction. To achieve the same purpose, in other embodiments using tooth-shaped protrusions, the protruding height of the tooth-shaped protrusion in the first direction is less than its protruding height in the second direction, or the spacing of the tooth-shaped protrusions in the first direction is greater than the spacing in the second direction.

[0035] When the seat surface angle changes, the elastic buffer body 300 has the largest deformation at its upper and lower ends. Therefore, in the present invention, the limiting protrusion 400 is arranged at the upper and / or lower end of the columnar cavity, and the limiting protrusion 400 is a metal part.

[0036] In a specific embodiment, the limiting protrusion 400 is disposed on the first inner connecting surface 101 of the adjusting base 100, and the protruding height of the limiting protrusion 400 is less than the distance between the connecting portion 200 and the adjusting base 100. The circumferentially arranged limiting protrusions 400 are embedded from the outer side surface of the elastic buffer body 300.

[0037] In another specific embodiment, the limiting protrusion 400 is disposed on the outer connecting surface 202 of the connecting portion 200, and the protruding height of the limiting protrusion 400 is less than the distance between the connecting portion 200 and the adjusting base 100. The circumferentially arranged limiting protrusions 400 are embedded from the inner side surface of the elastic buffer body 300.

[0038] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A seat angle adjustment device, characterized in that: It includes a connecting part and an adjusting base; the adjusting base is arranged under the seat cushion of the seat and has a columnar cavity; the connecting part is arranged in the columnar cavity and is used to be connected to the supporting column of the seat, and an elastic buffer body is filled between the connecting part and the adjusting base; the adjusting base is provided with a limiting protrusion protruding into the columnar cavity, and the elastic buffer body is provided with an avoidance position, and the avoidance position is used for the limiting protrusion to be embedded; the limiting protrusion is an annular protrusion or a plurality of tooth-like protrusions evenly arranged in a ring shape; the protruding height of the limiting protrusion is less than the distance between the connecting part and the adjusting base.

2. The seat angle adjustment device according to claim 1, characterized in that: The limiting protrusion is arranged close to the upper end and / or the lower end of the columnar cavity.

3. The seat angle adjustment device according to claim 1, characterized in that: The columnar cavity is in the shape of an elliptical column.

4. The seat angle adjustment device according to claim 1, characterized in that: The limiting protrusion is embedded in one side of the elastic buffer body.

5. The seat angle adjustment device according to claim 1, characterized in that: The protruding height of the annular protrusion or the tooth-shaped protrusion in the first direction is smaller than the protruding height in the second direction perpendicular to the first direction; or, the spacing between the tooth-shaped protrusions in the first direction is larger than the spacing between the tooth-shaped protrusions in the second direction.

6. A seat angle adjustment device, characterized in that: It comprises a connecting part and an adjusting base; the adjusting base is arranged under the seat cushion of the seat and has a columnar cavity; the connecting part is arranged in the columnar cavity and is used to be connected to the supporting column of the seat, and an elastic buffer body is filled between the connecting part and the adjusting base; the connecting part is provided with a limiting protrusion protruding outward, and the elastic buffer body is provided with an avoidance position, and the avoidance position is used for the limiting protrusion to be embedded; the limiting protrusion is an annular protrusion or a plurality of tooth-like protrusions evenly arranged in a ring shape; the protruding height of the limiting protrusion is less than the distance between the connecting part and the adjusting base.

7. The seat angle adjustment device according to claim 6, characterized in that: The limiting protrusion is arranged close to the upper end and / or the lower end of the connecting portion.

8. The seat angle adjustment device according to claim 1 or 6, characterized in that: The elastic buffer body is made of rubber material.

9. A seat, characterized in that: It comprises a seat angle adjustment device as described in any one of claims 1 to 7.

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