Seat angle adjustment device and seat

Abstract

The present invention discloses a seat angle adjustment device and a seat, wherein the seat angle adjustment device includes a base, a connecting portion and an elastic rubber pad; the base is used to connect and support the seat surface of the seat, and the base has a first inner connecting surface in the shape of an annular ring; the connecting portion is used to connect the pillar of the seat and the base, the connecting portion is annular and has a second inner connecting surface and an outer connecting surface, and the second inner connecting surface is used to connect the pillar; the elastic rubber pad is annular and is embedded between the first inner connecting surface and the outer connecting surface to match the first inner connecting surface and the outer connecting surface; the second inner connecting surface is a cylinder, and the first inner connecting surface is gradually tapered from the middle of the first inner connecting surface to the top in the seat height direction.

Description

Technical Field

[0001] The invention relates to the technical field of seats, and in particular to a seat angle adjustment device. 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 and a seat, 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 base, a connecting part and an elastic rubber pad; the base is used to connect and support the seat surface of the seat, and the base has a first inner connecting surface in the shape of an annular ring; the connecting part is used to connect the pillar of the seat and the base, the connecting part is annular and has a second inner connecting surface and an outer connecting surface, and the second inner connecting surface is used to connect the pillar; the elastic rubber pad is annular and is embedded between the first inner connecting surface and the outer connecting surface to match the first inner connecting surface and the outer connecting surface; the second inner connecting surface is a cylinder, and the first inner connecting surface is gradually tapered from the middle of the first inner connecting surface to the top in the seat height direction.

[0005] Preferably, the first inner connecting surface is arranged to be tapered from the middle portion to the bottom portion of the first inner connecting surface in the seat height direction.

[0006] Preferably, the first inner connecting surface is an arc-shaped surface with a middle portion convex outward.

[0007] Preferably, the first inner connecting surface is a conical surface with a middle portion convex outward.

[0008] Preferably, the first inner connecting surface is arranged to expand gradually from a middle position of the first inner connecting surface toward a bottom in the seat height direction.

[0009] Preferably, the first inner connecting surface is a tapered surface that gradually expands from top to bottom.

[0010] Preferably, the outer connecting surface is a cylindrical surface, the cross section of the first inner connecting surface is elliptical, and the major axis direction of the cross section of the first inner connecting surface is the front-to-back direction of the seat, and the minor axis direction of the cross section of the first inner connecting surface is the left-to-right direction of the seat.

[0011] Preferably, the cross-section of the first inner connecting surface is circular; the cross-section of the outer connecting surface is elliptical, and the major axis direction of the cross-section of the outer connecting surface is the front-to-back direction of the seat, and the minor axis direction of the cross-section of the outer connecting surface is the left-to-right direction of the seat.

[0012] The technical solution of the present invention limits the maximum adjustment angle of the seat surface and reduces the maximum deformation of the elastic pad by adopting a non-cylindrical elastic pad while facilitating the adjustment of the seat surface angle, thereby reducing damage to the elastic pad when the seat surface inclination angle changes and extending the service life.

[0013] The present invention also proposes a seat, which includes an angle adjustment device, and the angle adjustment device includes a base, a connecting part and an elastic rubber pad; the base is used to connect and support the seat surface of the seat, and the base has a first inner connecting surface in the shape of an annular ring; the connecting part is used to connect the pillar of the seat and the base, and the connecting part is annular and has a second inner connecting surface and an outer connecting surface, and the second inner connecting surface is used to connect the pillar; the elastic rubber pad is annular and is embedded between the first inner connecting surface and the outer connecting surface to match the first inner connecting surface and the outer connecting surface; the second inner connecting surface is a cylinder, and the first inner connecting surface is gradually tapered from the middle of the first inner connecting surface to the top in the seat height direction. 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 schematic diagram of the overall structure of an embodiment of a seat angle adjustment device of the present invention;

[0016] Figure 2-Figure 4 FIG. 1 is a schematic diagram of the structure of each component in an embodiment of a seat angle adjustment device of the present invention, wherein Figure 2 This is a schematic diagram of the base structure. Figure 3 This is the bottom view shown in the figure. Figure 4 This is a schematic diagram of the elastic rubber pad structure of this embodiment;

[0017] Figure 5 This is a schematic diagram of the structure of the connection part of the seat angle adjustment device of the present invention;

[0018] Figure 6 A schematic diagram of the base structure in an embodiment of the seat angle adjustment device of the present invention;

[0019] Figure 7 for Figure 6 A schematic diagram of the structure of the corresponding elastic rubber pad;

[0020] Figure 8 Schematic diagram of the structure of the elastic rubber pad in another embodiment of the seat angle adjustment device of the present invention.

[0021] Description of Figure Numbers:

[0022] Label name Label name 100 Base 202 External connection surface 101 First inner connection surface 300 Elastic rubber pad 200 Connection 400 pillar 201 Second inner connection surface

[0023] 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

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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 a height-adjustable design. The height of the chair is adjusted and fixed as needed. Chairs with backrests usually also use backrests with elastic recovery devices. The inclination angle of the backrest is dynamically adjusted according to the different forces. The seat surface of the chair usually adopts a fixed angle, and the seat surface is a horizontal plane and cannot be adjusted. However, in some cases, the angle of the seat surface also needs to be dynamically adjusted to better fit the force surface when a person sits on the chair, thereby increasing the comfort of the chair.

[0028] The present invention provides a seat angle adjustment device and a seat using the angle adjustment device, wherein the seat angle adjustment device is used to adjust the inclination angle of a seat surface. Specifically, the seat angle adjustment device includes a base 100, a connecting portion 200 and an elastic rubber pad 300; the base 100 is used to connect and support the seat surface of the seat, and the base 100 has a first inner connecting surface 101 in an annular shape; the connecting portion 200 is used to connect a pillar 400 of the seat and the base 100; the connecting portion 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 pillar 400; the second inner connecting surface 201 is a cylinder, and the first inner connecting surface 101 is gradually reduced from the middle part to the top of the first inner connecting surface 101 in the seat height direction; the elastic rubber pad 300 is annular, and is embedded between the first inner connecting surface 101 and the outer connecting surface 202 to match the first inner connecting surface 101 and the outer connecting surface 202.

[0029] The base 100 is fixedly connected to the bottom of the seat surface, and rises and falls or tilts with the seat surface (the seat surface is tilted); the top end of the seat support 400 is inserted into the connecting part 200 and fixedly connected to the second inner connecting surface 201 of the connecting part 200; the connecting part 200 and the base 100 are connected through the elastic rubber pad 300, and the first inner connecting surface 101 gradually shrinks from the middle to the top, so the thickness of the elastic rubber pad 300 decreases from the middle of the first inner connecting surface 101 to the top. The thicker the elastic rubber pad 300 is, the greater its deformation will be when it is subjected to the same pressure, and the easier it is to adjust the inclination angle of the seat surface. In the present invention, the deflection angle of the seat surface is positively correlated with the deformation amount of the elastic rubber pad 300, but the greater the deformation amount of the elastic rubber pad 300, the greater the damage and the shorter the service life of the elastic rubber pad 300. In order to extend the service life of the elastic rubber pad 300, the present invention adopts a non-cylindrical elastic rubber pad 300, the top thickness of which is less than the middle thickness. When the seat surface deflects, the thinner part of the top of the elastic rubber pad 300 will limit the deflection angle of the seat surface. Because when the thickness of the elastic rubber pad 300 is low, when subjected to the same pressure, its deformation amount will be correspondingly lower, and the damage will be correspondingly lighter. The range required for the seat surface angle adjustment is itself small, and the thickness of the middle part of the elastic rubber pad 300 is greater than the thickness of the top. On the premise of facilitating the adjustment of the seat surface inclination angle, the maximum inclination angle that the seat surface can deflect can be reduced, thereby reducing damage to the elastic rubber pad 300 and extending the service life of the seat adjustment device. Specifically, in the present invention, the top thickness of the elastic rubber pad 300 is between 3mm-20mm, and the middle thickness is between 10mm-35mm, and rubber material is preferably used. For a specific elastic rubber pad 300, the middle thickness should be greater than the top thickness. For example, when the top thickness of the elastic rubber pad 300 is 15mm, the middle thickness is greater than 15mm and less than or equal to 30mm.

[0030] In a specific embodiment, the first inner connecting surface 101 is gradually reduced from the middle of the first inner connecting surface 101 to the bottom in the seat height direction, and the first inner connecting surface 101 is an arc-shaped surface with the middle part convex outward. In this embodiment, the outer side surface of the elastic rubber pad 300 is an arc-shaped circular surface with the middle part convex outward, and its inner circumference is a cylindrical surface. In other embodiments, the first inner connecting surface 101 can also be a conical surface with the middle part convex outward. In this case, the elastic rubber pad 300 can be divided into two upper and lower conical parts (without the top angle part).

[0031] In addition, in another embodiment, the first inner connecting surface 101 is gradually expanded from the middle position of the first inner connecting surface 101 to the bottom in the seat height direction. Specifically, the first inner connecting surface 101 is a conical surface or an arc surface that gradually expands from top to bottom. At this time, the elastic rubber pad 300 is conical as a whole (without a top angle portion).

[0032] When the seat is in normal use, the user's demand for its front and rear tilt range is greater than its demand for its left and right tilt range. In order to better meet the actual needs of users, the present invention proposes another embodiment. In this embodiment, the outer connecting surface 202 is a cylindrical surface, the cross section of the first inner connecting surface 101 is an ellipse, and the long axis direction of the cross section of the first inner connecting surface 101 is the front and rear direction of the seat, and the short axis direction of the cross section of the first inner connecting surface 101 is the left and right direction of the seat; or, the cross section of the first inner connecting surface 101 is a circle; the cross section of the outer connecting surface 202 is an ellipse, and the long axis direction of the cross section of the outer connecting surface 202 is the front and rear direction of the seat, and the short axis direction of the cross section of the outer connecting surface 202 is the left and right direction of the seat. The elastic rubber pad 300 is filled between the outer connecting surface 202 and the first inner connecting surface 101. In this embodiment, the thickness of the elastic rubber pad 300 in the front and rear direction of the seat is greater than its thickness in the left and right direction of the seat, so that the maximum tilt angle of the seat in the front and rear direction can be greater than its maximum tilt angle in the left and right direction.

[0033] 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: include: A base, used to connect and support the seat surface of the chair; the base has a first inner connecting surface in an annular shape; A connecting portion, used to connect the pillar of the seat and the base; The connecting portion is annular and has a second inner connecting surface and an outer connecting surface, wherein the second inner connecting surface is used to connect the support pillar; An elastic rubber pad, which is annular and embedded between the first inner connecting surface and the outer connecting surface in a manner adapted to the first inner connecting surface and the outer connecting surface; the top thickness of the elastic rubber pad is smaller than the middle thickness; The second inner connecting surface is a cylindrical surface, and the first inner connecting surface is arranged to be gradually reduced from the middle portion to the top portion of the first inner connecting surface in the seat height direction.

2. The seat angle adjustment device according to claim 1, characterized in that: The first inner connecting surface is arranged to be gradually reduced from the middle portion to the bottom portion of the first inner connecting surface in the seat height direction.

3. The seat angle adjustment device according to claim 2, characterized in that: The first inner connecting surface is an arc-shaped surface with a middle portion convex outward.

4. The seat angle adjustment device according to claim 2, characterized in that: The first inner connecting surface is a conical surface with a middle portion protruding outward.

5. The seat angle adjustment device according to claim 1, characterized in that: The first inner connecting surface is gradually expanded from the middle position of the first inner connecting surface to the bottom in the seat height direction.

6. The seat angle adjustment device according to claim 5, characterized in that: The first inner connecting surface is a tapered surface that gradually expands from top to bottom.

7. The seat angle adjustment device according to any one of claims 1 to 6, characterized in that: The outer connecting surface is a cylindrical surface, the cross section of the first inner connecting surface is an ellipse, and the long axis direction of the cross section of the first inner connecting surface is the front-to-back direction of the seat, and the short axis direction of the cross section of the first inner connecting surface is the left-to-right direction of the seat.

8. The seat angle adjustment device according to any one of claims 1 to 6, characterized in that: The cross section of the first inner connecting surface is circular; the cross section of the outer connecting surface is elliptical, and the long axis direction of the cross section of the outer connecting surface is the front-to-back direction of the seat, and the short axis direction of the cross section of the outer connecting surface is the left-to-right direction of the seat.

9. A seat, characterized in that: It comprises a seat angle adjustment device as described in any one of claims 1-8.

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