Automatic resetting mechanism for chair and chair legs

Abstract

The utility model discloses an automatic resetting mechanism and a chair leg for a chair, which relate to the technical field of chair accessories, the automatic resetting mechanism comprises a mounting cylinder and a resetting component, the resetting component further comprises a rotating shaft, the lower end of the rotating shaft extends into the mounting cylinder and is rotatably connected with the mounting cylinder, a resetting gasket is fixed in the mounting cylinder, and the resetting gasket is fixedly connected with the rotating shaft. An annular inclined track surface is arranged at the upper end of the reset gasket, a walking piece walks on the inclined track surface, and the elastic piece applies downward elastic force to the lifting seat along the axial direction of the rotating shaft and forces the walking piece and the inclined track surface to be in tangent movable contact all the time. When the rotating shaft rotates, the walking piece walks on the inclined track face formed by the reset gasket, when the walking piece walks to the high point of the inclined track face, the elastic piece is compressed, at the moment, the elastic piece releases elastic potential energy, the walking piece returns to the lowest point from the highest point and finally stays at the lowest point, and the reset function is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of chair accessories, in particular to an automatic resetting mechanism for a chair and a chair foot. Background Art

[0002] Chairs are commonly used in offices and homes. In order to have a convenient sitting posture, the angle between the chair and the table is usually set in advance. In a crowded office area, when a colleague accidentally swings the chair after get off work, the angle between the chair and the table deviates. When going to work again, you need to swing it back manually, which is very time-consuming.

[0003] The existing patent (publication number: CN220343998U) proposes a chair with a reset function, a seat and a backrest, the seat includes a horizontally arranged installation box, a mounting groove is provided in the installation box, a plurality of supporting feet arranged in an outward-facing shape are provided at the bottom of the installation box, and an automatic reset mechanism is rotatably connected in the installation groove, including a reset spring.

[0004] The above-mentioned chair with reset function adopts a reset spring in the technical solution of resetting. One end of the reset spring is fixedly connected to the other end of the rotating plate, and the other end of the reset spring is connected to the mounting groove. The reset of the reset spring pulls back the rotating plate to reset the chair. The problem with this solution is that although it can solve the reset problem, when the user sits on the chair back and leaves in any direction, the automatic reset mechanism works to make the chair back rotate and turn on the seat, and the position of the chair back is rotated in the positive direction to reset the chair back. When the direction of the chair back is not in the original positive direction, it needs to be locked so as not to change the position of the chair back. At this time, the rotation locking mechanism works to lock the chair back to the top of the mounting box, and the direction of the chair back is locked for the user's use. It can be seen that the actual operation is relatively cumbersome. Therefore, we propose an automatic reset mechanism for a chair to solve the above problem. Utility Model Content

[0005] The utility model provides an automatic resetting mechanism for a chair, which solves the technical problem that the current automatic resetting operation of the chair is complicated.

[0006] In order to solve the above technical problems, the utility model provides an automatic reset mechanism for a chair, including a mounting tube and a reset assembly, the reset assembly also includes a rotating shaft whose lower end extends into the mounting tube and is rotatably connected to the mounting tube, a reset washer is fixed in the mounting tube, and the lower end of the rotating shaft passes through the reset washer, an annular inclined track surface is provided at the upper end of the reset washer, a lifting seat is axially slidably connected to the rotating shaft and the lifting seat and the rotating shaft are relatively fixed axially, a walking member that is tangentially in contact with the inclined track surface and walks on the inclined track surface is provided on the lifting seat, the automatic reset mechanism for the chair also includes an elastic member that applies an axial downward elastic force to the lifting seat along the rotating shaft and forces the walking member to always be tangentially in contact with the inclined track surface.

[0007] Preferably, the rotating shaft and the lifting seat are sleeved and slidably matched with each other.

[0008] By adopting the above technical solution, the rotating shaft and the lifting seat are sleeved and slidably matched with each other, so that when the walking member moves to the highest point and the lowest point of the inclined track surface opened on the reset washer, the lifting seat can slide relatively in the rotating shaft.

[0009] Preferably, a guide blind hole whose lower end is connected to the outside is provided inside the rotating shaft, the lifting seat is columnar and inserted into the guide blind hole, and the elastic member is provided between the bottom of the guide blind hole and the top of the lifting seat.

[0010] The above technical solution is adopted: a guide blind hole whose lower end is connected to the outside is provided inside the rotating shaft, the lifting seat is columnar and inserted into the guide blind hole, an elastic member is provided between the bottom of the guide blind hole and the top of the lifting seat, and the elastic member can be compressed and reset when the walking member walks to the highest point and the lowest point of the inclined track surface opened on the reset washer. When the elastic member is reset, the walking member moves to the initial starting point.

[0011] Preferably, an axis groove is provided on the wall thickness of the rotating shaft, a fixed shaft is provided in the radial direction of the lifting seat, the fixed shaft is inserted into the axis groove and the outer end of the fixed shaft extends beyond the outer wall of the rotating shaft, and the walking member is provided at the outer end of the fixed shaft.

[0012] The above technical solution is adopted: by providing an axis groove on the wall of the rotating shaft, providing a fixed shaft in the radial direction of the lifting seat, the fixed shaft is inserted into the axis groove and the outer end of the fixed shaft is extended beyond the outer wall of the rotating shaft, and a walking piece is provided at the outer end of the fixed shaft. The fixed shaft is clamped in the axis groove. When the elastic piece is compressed, it moves up along the clamping groove. When the elastic piece is reset, the fixed shaft moves down along the axis groove. The walking piece just moves to the lowest point of the inclined track surface to achieve reset.

[0013] Preferably, the thickness of the lifting seat is adapted to the size of the guide blind hole opened inside the rotating shaft.

[0014] By adopting the above technical solution, the thickness of the lifting seat is matched with the size of the guide blind hole opened inside the rotating shaft, so that when the lifting seat moves up and down, it will not shake due to the mismatch between the lifting seat and the guide blind hole.

[0015] Preferably, a bearing component is provided between the mounting cylinder and the rotating shaft.

[0016] By adopting the above technical solution, a bearing component is provided between the mounting cylinder and the rotating shaft, so that the mounting cylinder can be better fixed relative to the rotating shaft through the bearing component.

[0017] Preferably, a first bearing is provided between an upper end of a section of the rotating shaft inserted in the mounting tube and the mounting tube, and a second bearing is provided between a lower end of a section of the rotating shaft inserted in the mounting tube and the mounting tube.

[0018] The above technical solution is adopted: by providing a first bearing and a second bearing, the mounting cylinder can be better fixed relative to the rotating shaft through the first bearing and the second bearing, and the first bearing and the second bearing together constitute a bearing component.

[0019] Preferably, the reset washer is located between the first bearing and the second bearing, and the reset washer is fixedly connected to the inner wall of the mounting tube and / or the outer ring of the second bearing.

[0020] The above technical solution is adopted: the reset washer is located between the first bearing and the second bearing, and the reset washer is fixedly connected to the inner wall of the mounting tube and / or the outer ring of the second bearing, so that when the rotating shaft rotates, the reset washer is always fixed.

[0021] Preferably, a gasket groove is provided at the bottom of the rotating shaft, an anti-slip gasket is clamped on the gasket groove, and the anti-slip gasket abuts against the bottom of the inner ring of the second bearing.

[0022] The above technical solution is adopted: a gasket groove is opened at the bottom of the rotating shaft for clamping an anti-drop gasket, and an anti-drop gasket is clamped on the gasket groove. The anti-drop gasket presses against the bottom of the inner ring of the second bearing to prevent the second bearing and the reset gasket supported by the second bearing from falling off the rotating shaft.

[0023] The present application also provides a chair leg, which includes the automatic resetting mechanism for the chair.

[0024] Compared with the related art, the utility model has the following beneficial effects:

[0025] 1. Compared with the conventional method, the utility model is provided with a reset washer fixed in the installation cylinder, and the lower end of the rotating shaft passes through the reset washer, and the upper end of the reset washer is provided with a ring-shaped inclined track surface, and a lifting seat is slidably connected to the axial direction of the rotating shaft, and the lifting seat and the rotating shaft are relatively fixed in the axial direction, and a walking member that is tangentially in contact with the inclined track surface and walks on the inclined track surface is provided on the lifting seat, and the automatic reset mechanism for the chair also includes an elastic member that applies an axial downward elastic force to the lifting seat along the rotating shaft and forces the walking member to always be tangentially in contact with the inclined track surface. When the rotating shaft rotates, the walking member walks on the inclined track surface opened by the reset washer, and when it walks to the high point of the inclined track surface, the elastic member is compressed, and at this moment the elastic member releases elastic potential energy, so that the walking member returns from the highest point to the lowest point, and finally stays at the lowest point, thereby realizing the reset function.

[0026] 2. In the present invention, by providing the first bearing and the second bearing, the rotating shaft can be inserted into the inner ring of the first bearing and the second bearing, so that the rotating shaft is relatively fixed in the installation tube, which is convenient for the subsequent installation of the chair legs on the installation tube, and the seat surface is fixed on the rotating shaft, which is convenient for installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of an automatic reset mechanism for a chair;

[0028] Figure 2 A cross-sectional view of an automatic reset mechanism for a chair;

[0029] Figure 3 This is a partial structural diagram of an automatic reset mechanism for a chair;

[0030] Figure 4 The present invention is a disassembled diagram of a reset component in an automatic reset mechanism for a chair;

[0031] Figure 5 The present invention is a diagram of an automatic resetting mechanism and chair leg installation for a chair.

[0032] Numbers in the figure: 1. Mounting cylinder; 2. First bearing; 3. Reset assembly; 31. Rotating shaft; 32. Elastic member; 33. Lifting seat; 34. Fixed shaft; 35. Walking member; 36. Reset washer; 37. Anti-slip gasket; 38. Inclined track surface; 39. Guide blind hole; 4. Second bearing; 5. Shaft groove; 6. Gasket groove. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Embodiment 1

[0034] like Figure 1-Figure 5 As shown, an automatic reset mechanism for a chair comprises a mounting tube 1 and a reset assembly 3, wherein the reset assembly 3 further comprises a rotating shaft 31 whose lower end extends into the mounting tube 1 and is rotatably connected to the mounting tube 1, wherein the protruding portion of the rotating shaft 31 relative to the mounting tube 1 is in a cone-shaped columnar shape, a reset washer 36 is fixed in the mounting tube 1, and the lower end of the rotating shaft 31 passes through the reset washer 36, and an annular inclined track surface 38 is provided at the upper end of the reset washer 36, a lifting seat 33 is axially slidably connected to the rotating shaft 31, and the lifting seat 33 and the rotating shaft 31 are relatively fixed axially, and a walking member 35 is provided on the lifting seat 33, which is in tangential movable contact with the inclined track surface 38 and walks on the inclined track surface 38, and the automatic reset mechanism for a chair further comprises an elastic member 32 which applies an axial downward elastic force to the lifting seat 33 along the rotating shaft 31 and forces the walking member 35 to always be in tangential movable contact with the inclined track surface 38;

[0035] A reset washer 36 is fixed inside, and the lower end of the rotating shaft 31 passes through the reset washer 36. An annular inclined track surface 38 is provided at the upper end of the reset washer 36. The reset washer 36 is made of rubber and / or plastic and / or metal material. A lifting seat 33 is slidably connected to the axial direction of the rotating shaft 31, and the lifting seat 33 and the rotating shaft 31 are relatively fixed in the axial direction. A walking member 35 is provided on the lifting seat 33, which is in tangential and movable contact with the inclined track surface 38 and walks on the inclined track surface 38. The walking member 35 can be a bearing or a roller. The automatic reset mechanism for the chair also includes an elastic member 32 that applies an axial downward elastic force to the lifting seat 33 along the rotating shaft 31 and forces the walking member 35 and the inclined track surface 38 to always be in tangential and movable contact. When the rotating shaft 31 rotates, the walking member 35 moves on the inclined track surface 38 opened by the reset washer 36. When it moves to the highest point of the inclined track surface 38, the elastic member 32 is compressed. At this moment, the elastic member 32 releases its elastic potential energy, so that the walking member 35 returns from the highest point to the lowest point, and finally stays at the lowest point, thereby realizing the reset function. Embodiment 2

[0036] like Figure 1-Figure 5As shown, the rotating shaft 31 and the lifting seat 33 are sleeved and slidably matched with each other, a guide blind hole 39 whose lower end is connected to the outside is provided inside the rotating shaft 31, the lifting seat 33 is columnar and inserted into the guide blind hole 39, an elastic member 32 is provided between the bottom of the guide blind hole 39 and the top of the lifting seat 33, an axis groove 5 is provided on the wall thickness of the rotating shaft 31, a fixed shaft 34 is provided in the radial direction of the lifting seat 33, the fixed shaft 34 is inserted in the axis groove 5 and the outer end of the fixed shaft 34 is extended beyond the outer wall of the rotating shaft 31, a walking member 35 is provided at the outer end of the fixed shaft 34, the thickness of the lifting seat 33 is adapted to the size of the guide blind hole 39 opened inside the rotating shaft 31, and a bearing is provided between the mounting cylinder 1 and the rotating shaft 31 A component, a first bearing 2 is provided between an upper end of a section of the rotating shaft 31 inserted in the mounting tube 1 and the mounting tube 1, a second bearing 4 is provided between a lower end of a section of the rotating shaft 31 inserted in the mounting tube 1 and the mounting tube 1, the first bearing 2 and the second bearing 4 together constitute a bearing component, a reset washer 36 is located between the first bearing 2 and the second bearing 4, and the reset washer 36 is fixedly connected to the inner wall of the mounting tube 1 and / or the outer ring of the second bearing 4, a gasket groove 6 is provided at the bottom of the rotating shaft 31 for clamping an anti-dropping gasket 37, an anti-dropping gasket 37 is clamped on the gasket groove 6, and the anti-dropping gasket 37 abuts against the bottom of the inner ring of the second bearing 4 to prevent the second bearing 4 and the reset gasket 36 supported by the second bearing 4 from falling off from the rotating shaft 31;

[0037] A guide blind hole 39 is provided inside the rotating shaft 31, the lower end of which is connected to the outside. The lifting seat 33 is cylindrical and inserted into the guide blind hole 39. An elastic member 32 is provided between the bottom of the guide blind hole 39 and the top of the lifting seat 33. When the moving member 35 moves to the highest point and the lowest point of the inclined track surface 38 opened on the reset washer 36, the elastic member 32 can be compressed and reset. When the elastic member 32 is reset, the moving member 35 moves to the initial starting point.

[0038] An axis groove 5 is provided on the wall of the rotating shaft 31, and a fixed shaft 34 is provided in the radial direction of the lifting seat 33. The fixed shaft 34 is inserted into the axis groove 5 and the outer end of the fixed shaft 34 is extended beyond the outer wall of the rotating shaft 31. A walking member 35 is provided at the outer end of the fixed shaft 34. The fixed shaft 34 is clamped in the axis groove 5. When the elastic member 32 is compressed, it moves up along the clamping groove. When the elastic member 32 is reset, the fixed shaft 34 moves down along the axis groove 5, and the walking member 35 just moves to the lowest point of the inclined track surface 38.

[0039] Working principle: Figure 1-5As shown, the seat surface is installed on the top of the rotating shaft 31. When the seat surface rotates, the shaft groove 5 opened on one side of the bottom of the rotating shaft 31 is clamped with the fixed shaft 34, so that the fixed shaft 34 drives the walking member 35 to walk on the inclined track surface 38 opened on the reset washer 36. When walking to the highest point on the inclined track surface 38, the lifting seat 33 moves up, and the elastic member 32 is compressed, so that the elastic member 32 generates elastic potential energy and releases it, thereby pushing the lifting seat 33 to move down, forcing the walking member 35 to walk along the inclined track surface 38 to the lowest point, and finally stay at the lowest point, realizing the reset function. Embodiment 3

[0040] Based on the above-mentioned embodiment 1 and embodiment 2, as Figure 5 As shown, this embodiment further provides a chair leg, including the automatic reset mechanism for a chair of the first embodiment and the second embodiment, and a plurality of chair leg support members are provided on the outer wall of the mounting tube 1. The chair leg support members are fixed to the outer wall of the mounting tube 1 by detachable or welding methods. For details on the detachable method, please refer to the patent application number: 2023233834367 previously applied by the applicant.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic reset mechanism for a chair, comprising a mounting tube (1) and a reset assembly (3), wherein the reset assembly (3) further comprises a rotating shaft (31) whose lower end extends into the mounting tube (1) and is rotatably connected to the mounting tube (1), characterized in that: A reset washer (36) is fixed in the mounting tube (1), and the lower end of the rotating shaft (31) passes through the reset washer (36). An annular inclined track surface (38) is provided at the upper end of the reset washer (36). A lifting seat (33) is axially slidably connected to the rotating shaft (31), and the lifting seat (33) and the rotating shaft (31) are relatively fixed axially. A walking member (35) is provided on the lifting seat (33) and is in tangential and movable contact with the inclined track surface (38) and walks on the inclined track surface (38). The automatic reset mechanism for the chair also includes an elastic member (32) that applies an axial downward elastic force to the lifting seat (33) along the rotating shaft (31) and forces the walking member (35) to always be in tangential and movable contact with the inclined track surface (38).

2. The automatic resetting mechanism for a chair according to claim 1, characterized in that: The rotating shaft (31) and the lifting seat (33) are sleeved and slidably matched with each other.

3. The automatic reset mechanism for a chair according to claim 1 or 2, characterized in that: A guide blind hole (39) whose lower end is connected to the outside is provided inside the rotating shaft (31); the lifting seat (33) is columnar and inserted into the guide blind hole (39); and the elastic member (32) is provided between the bottom of the guide blind hole (39) and the top of the lifting seat (33).

4. The automatic reset mechanism for a chair according to claim 3, characterized in that: An axis groove (5) is provided on the wall of the rotating shaft (31), and a fixed shaft (34) is provided in the radial direction of the lifting seat (33). The fixed shaft (34) is inserted into the axis groove (5) and the outer end of the fixed shaft (34) extends beyond the outer wall of the rotating shaft (31). The walking member (35) is provided at the outer end of the fixed shaft (34).

5. The automatic reset mechanism for a chair according to claim 1, characterized in that: The thickness of the lifting seat (33) is adapted to the size of the guide blind hole (39) provided inside the rotating shaft (31).

6. The automatic reset mechanism for a chair according to claim 1, characterized in that: A bearing component is provided between the installation cylinder (1) and the rotating shaft (31).

7. The automatic resetting mechanism for a chair according to claim 6, characterized in that: A first bearing (2) is provided between an upper end of a section of the rotating shaft (31) inserted into the mounting tube (1) and the mounting tube (1), and a second bearing (4) is provided between a lower end of a section of the rotating shaft (31) inserted into the mounting tube (1) and the mounting tube (1).

8. The automatic resetting mechanism for a chair according to claim 7, characterized in that: The reset washer (36) is located between the first bearing (2) and the second bearing (4), and the reset washer (36) is fixedly connected to the inner wall of the mounting cylinder (1) and / or the outer ring of the second bearing (4).

9. The automatic resetting mechanism for a chair according to claim 4, characterized in that: A gasket groove (6) is provided at the bottom of the rotating shaft (31), an anti-slip gasket (37) is clamped on the gasket groove (6), and the anti-slip gasket (37) abuts against the bottom of the inner ring of the second bearing (4).

10. Chair legs, characterized in that: The chair legs include the automatic resetting mechanism for a chair as described in any one of claims 1-9.

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