CN112205798A

CN112205798A - Automatic rotating tray for swivel chair

Info

Publication number: CN112205798A
Application number: CN202011249415.4A
Authority: CN
Inventors: 陈振杰
Original assignee: Jiangmen Yueligu Furniture Co ltd
Current assignee: Jiangmen Yueligu Furniture Co ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-01-12

Abstract

The invention discloses an automatic rotating tray for a swivel chair, which comprises an accommodating cavity formed by an upper supporting plate and a lower supporting plate, wherein a taper sleeve is rotationally fixed in the accommodating cavity, an eccentric wheel is also fixed on the taper sleeve, a reset swing arm and a reset spring are also arranged in the accommodating cavity, a connecting part on the reset swing arm is elastically abutted against a flange of the eccentric wheel, when the eccentric wheel rotates along with the taper sleeve, the abutting point of the connecting part and the flange of the eccentric wheel moves, the connecting part swings relative to the fixed end of the reset swing arm, the elasticity of the reset spring changes, and when the torque applied to the taper sleeve disappears, the eccentric wheel freely rotates under the action of the tension of the reset spring, and the connecting part returns to be clamped into a positioning groove. Therefore, the automatic rotary tray can ensure that the rotary chair with changed angles can be reset at any time, the environment for a plurality of people to use the rotary chair is more orderly, and the evaluation and the requirement of the people on the cleanliness of the public environment can be fully met.

Description

Automatic rotating tray for swivel chair

Technical Field

The invention relates to the technical field of swivel chair trays, in particular to an automatic rotary tray for a swivel chair.

Background

The structure of a common swivel chair comprises a bottom tray, a middle rotating shaft and an upper swivel chair, wherein the middle rotating shaft is connected with a taper sleeve in the bottom tray. When people sit on the chair seat and need to rotate by an angle, the chair seat is rotated by the aid of the force of feet or hands, and the chair seat rotates relative to the tray to realize angle change. The swivel chair is mainly used in offices and many public places, but the swivel chair has a problem that when a user leaves a seat after changing a certain angle, the state of the swivel chair is always kept at the leaving angle, and the swivel chair cannot return to a certain fixed angle, so that the environment in which a plurality of people use the swivel chair is messy, and the judgment and the requirement of the people on the cleanliness of the public environment are influenced.

Disclosure of Invention

In view of the above-mentioned deficiencies of the prior art, the present invention provides an automatic swivel tray for a swivel chair, which has a simple and reasonable structure and can make the direction of the swivel chair return to a preset position without external force.

The present invention achieves the above object by:

an automatic rotating tray for a swivel chair comprises an upper supporting plate, a taper sleeve and a lower supporting plate, wherein an upper through hole capable of penetrating through the taper sleeve is formed in the upper supporting plate, a containing cavity is formed between the upper supporting plate and the lower supporting plate, an upper supporting groove and a lower supporting groove which are coaxial are respectively arranged on the upper supporting plate and the lower supporting plate, the taper sleeve is respectively and rotatably connected with the upper supporting groove and the lower supporting groove through an upper bearing and a lower bearing, an eccentric wheel is further connected onto the taper sleeve, a reset swing arm and a pre-tightened reset spring are rotatably arranged in the containing cavity, the free ends of the reset swing arm and the reset spring are rotatably connected, a connecting part is arranged on the reset swing arm, the connecting part elastically abuts against a flange of the eccentric wheel, and a positioning groove capable of being.

Further, the positioning groove is located on the flange at the position closest to the axle center of the eccentric wheel, and the return spring is pre-tensioned.

Further, the eccentric wheel is clamped between the upper bearing and the lower bearing.

Furthermore, an elastic shock pad is arranged in the positioning groove.

Further, the connecting part comprises a fixing pin fixed on the reset swing arm and a reset bearing installed on the fixing pin.

Furthermore, the lower edge of the outer edge of the eccentric wheel protrudes in the radial direction to form a positioning convex edge, and the reset bearing is positioned on the positioning convex edge.

Furthermore, the shock absorption pads are silica gel columns fixed on two sides in the positioning grooves, and the outer contour of the reset bearing is in rolling connection with the positioning grooves and is in elastic contact with the silica gel columns.

Furthermore, the upper through hole is a flanging hole, and the upper bracket is positioned in the flanging hole.

Furthermore, the side wall of the lower bracket is a convex ring formed by extending the inner surface of the lower supporting plate upwards, the lower bearing is clamped in the convex ring, and the bottom of the eccentric wheel is sunken in to form a lower wheel cavity capable of containing the convex ring and the lower bearing.

The invention has the beneficial effects that: the invention provides an automatic rotating tray for a swivel chair, which comprises an accommodating cavity formed by an upper supporting plate and a lower supporting plate, wherein a taper sleeve is rotationally fixed in the accommodating cavity, an eccentric wheel is also fixed on the taper sleeve, a reset swing arm and a reset spring are also arranged in the accommodating cavity, a connecting part on the reset swing arm is elastically abutted against a flange of the eccentric wheel, when the eccentric wheel rotates along with the taper sleeve, the abutting point of the connecting part and the flange of the eccentric wheel moves, the connecting part swings relative to the fixed end of the reset swing arm, the elasticity of the reset spring changes, and when the torque applied to the taper sleeve disappears, the eccentric wheel freely rotates under the action of the tension of the reset spring, and the connecting part returns to be clamped into a positioning groove. Therefore, the automatic rotary tray can ensure that the rotary chair with changed angles can be reset at any time, the environment for a plurality of people to use the rotary chair is more orderly, and the evaluation and the requirement of the people on the cleanliness of the public environment can be fully met.

Drawings

The invention is further illustrated with reference to the following figures and examples:

FIG. 1 is a schematic illustration of a split structure according to an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of the taper sleeve in FIG. 1;

fig. 3 is another structural view of the eccentric wheel in fig. 1.

In the figure, an upper supporting plate 1, an upper through hole 11, an upper bracket 12, a conical sleeve 2, an upper bearing 21, a lower bearing 22, a connecting pin shaft 23, a lower supporting plate 3, a lower bracket 31, a convex ring 32, a containing cavity 4, an eccentric wheel 5, a flange 51, a positioning groove 52, a damping pad 53, a lower wheel cavity 54, a reset swing arm 61, a reset spring 62, a connecting part 63, a fixing pin 64 and a reset bearing 65.

Detailed Description

Referring to fig. 1 to 3, an automatic swivel tray for a swivel chair, comprising an upper plate 1, a cone sleeve 2 and a lower plate 3, an upper through hole 11 which can pass through the taper sleeve 2 is arranged on the upper supporting plate 1, an accommodating cavity 4 is formed between the upper supporting plate 1 and the lower supporting plate 3, an upper bracket 12 and a lower bracket 31 which are coaxial are respectively arranged on the upper supporting plate 1 and the lower supporting plate 3, the taper sleeve 2 is respectively connected with the upper bracket 12 and the lower bracket 31 in a rotating way through an upper bearing 21 and a lower bearing 22, the taper sleeve 2 is also connected with an eccentric wheel 5, a reset swing arm 61 and a pre-tightened reset spring 62 are rotatably arranged in the accommodating cavity 4, the free ends of the reset swing arm 61 and the reset spring 62 are rotatably connected, the reset swing arm 61 is provided with a connecting part 63, the connecting part 63 elastically abuts against the flange 51 of the eccentric wheel 5, and the flange 51 is provided with a positioning groove 52 which can be clamped with the connecting part 63.

The reset swing arm 61 and the reset spring 62 are rotationally fixed on the lower supporting plate 3 and are respectively positioned at two sides of the eccentric wheel 5. When the swivel chair is not subjected to torque, the return spring 62 is subjected to a predetermined pulling force to ensure that the connecting portion 63 is caught in the positioning groove 52. Of course, the return spring 62 may also be arranged to urge the connecting portion into the positioning slot 52 in a pre-compressed state. Wherein the taper sleeve 2 is linked with the swivel chair, the eccentric wheel 5 is sleeved on the taper sleeve 2, and the eccentric wheel 5 is linked with the taper sleeve 2 through a connecting pin shaft. Form holding chamber 4 through upper plate 1 and bottom plate 2, can concentrate above-mentioned part and accomodate in holding chamber 4, make automatic tray structure of circling round compacter, it is more convenient to use.

Preferably, the positioning slot 52 is located on the flange 51 closest to the axial center of the eccentric 5, and the return spring 62 is pretensioned.

Since the positioning slot 52 is located on the flange 51 closest to the axial center of the eccentric 5, when the connecting part 63 is clamped in the positioning slot 52, the prestressed return spring 62 can make the eccentric 5 free from torque and make the swivel chair in a stable position relative to the base tray when no external force is applied. When the user rotates the swivel chair, the taper sleeve 2 drives the eccentric wheel 5 to rotate, under the action of the return spring 62, the connecting part 63 still abuts against the flange 51, but the connecting part 63 swings relative to the rotation centers of the return swing arm 61 and the return spring 62, the tension of the return spring 62 is gradually increased, and the connecting part 63 generates reverse torque relative to the eccentric wheel 5, but the reverse torque can be counteracted at any angle due to the action of the user, but when the user leaves the swivel chair, the reverse torque drives the eccentric wheel 5 to reversely rotate until the connecting part 63 is clamped back into the positioning groove 52 again, namely, the swivel chair is reset relative to the bottom tray.

Preferably, the eccentric 5 is clamped between the upper bearing 21 and the lower bearing 22.

Two clamp springs are clamped on the taper sleeve 2 and are respectively fixed on the upper bearing 21 and the lower bearing 22.

An elastic shock pad 53 is arranged in the positioning groove 52.

The shock-absorbing pad 53 can reduce noise generated when the connecting portion 63 is caught in the positioning groove 52.

Preferably, the connecting portion 63 includes a fixing pin 64 fixed to the reset swing arm 61 and a reset bearing 65 mounted on the fixing pin 64.

After the reset bearing 65 is clamped on the fixing pin 64, the outer end of the fixing pin 61 is turned over again to rivet the reset bearing 65 tightly. The outer edge of the reset bearing 65 abuts against the flange 51 of the eccentric wheel 5, so that the reset bearing 65 and the flange 51 can rotate more smoothly when abutting against each other.

Preferably, the lower edge of the outer edge of the eccentric wheel 5 protrudes in the radial direction to form a positioning flange 55, and the reset bearing 65 is located on the positioning flange 65.

The positioning flange 65 can further act as a stop from the bottom of the reset bearing 65.

Preferably, the shock absorbing pads 53 are silica gel columns fixed at two sides in the positioning groove 52, and the outer contour of the reset bearing 65 is in rolling connection with the positioning groove 52 and is in elastic contact with the silica gel columns.

The silica gel columns are positioned at two sides in the positioning groove 52, so that the elastic silica gel columns can be contacted with the reset bearing 65 from which side enters the positioning groove 52 at first, and the functions of sound attenuation and shock absorption and impact balancing are achieved.

Preferably, the upper through hole 11 is a flanged hole, and the upper bracket 12 is located in the flanged hole.

The flanging hole singly reserves a space for the upper bracket 12, so that the height of the accommodating cavity 4 is not too high, and the outer part of the flanging hole is gradually reduced upwards and is in linear smooth transition, so that the upper bracket is naturally connected with the rotating shaft, and the appearance is more attractive.

Preferably, the side wall of the lower bracket 31 is a convex ring 32 formed by extending upwards from the inner surface of the lower supporting plate 3, the lower bearing 22 is clamped in the convex ring 32, and the bottom of the eccentric wheel 5 is recessed to form a lower wheel cavity 54 capable of accommodating the convex ring 32 and the lower bearing 22.

The lower bearing 22 is arranged in the lower wheel cavity 54, on one hand, the height of the required accommodating cavity 4 is reduced, and on the other hand, the eccentric wheel 5 and the lower bearing 22 are on the same rotating plane, so that the consistency of all points on the flange 51 of the eccentric wheel 5 can be kept during rotation.

It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the spirit and scope of the present invention should be covered by the appended claims.

Claims

1. The utility model provides an automatic tray that circles round for swivel chair, includes mounting plate (1), taper sleeve (2) and bottom plate (3), be equipped with on mounting plate (1) and pass through last through-hole (11) of taper sleeve (2), its characterized in that: an accommodating cavity (4) is formed between the upper supporting plate (1) and the lower supporting plate (3), an upper bracket (12) and a lower bracket groove (31) which are coaxial are respectively arranged on the upper supporting plate (1) and the lower supporting plate (3), the taper sleeve (2) is respectively connected with the upper bracket (12) and the lower bracket groove (31) in a rotating way through an upper bearing (21) and a lower bearing (22), the taper sleeve (2) is also connected with an eccentric wheel (5), a reset swing arm (61) and a pre-tightened reset spring (62) are rotatably arranged in the accommodating cavity (4), the free ends of the reset swing arm (61) and the reset spring (62) are rotatably connected, the reset swing arm (61) is provided with a connecting part (63), the connecting part (63) elastically abuts against a flange (51) of the eccentric wheel (5), a positioning groove (52) which can be engaged with the connecting part (63) is arranged on the flange (51).

2. The automatic swivel tray for a swivel chair according to claim 1, wherein: the positioning groove (52) is located on the flange (51) at the position closest to the axle center of the eccentric wheel (5), and the return spring (62) is pre-tensioned.

3. The automatic swivel tray for a swivel chair according to claim 1, wherein: the eccentric wheel (5) is clamped between the upper bearing (21) and the lower bearing (22).

4. The automatic swivel tray for a swivel chair according to claim 1 or 2, characterized in that: an elastic shock absorption pad (53) is arranged in the positioning groove (52).

5. The automatic swivel tray for a swivel chair according to claim 1 or 2, characterized in that: the connecting part (63) comprises a fixing pin (64) fixed on the reset swing arm (61) and a reset bearing (65) installed on the fixing pin (64).

6. The automatic swivel tray for a swivel chair according to claim 5, wherein: the lower edge of the outer edge of the eccentric wheel (5) protrudes along the radial direction to form a positioning convex edge (55), and the reset bearing (65) is positioned on the positioning convex edge (65).

7. The automatic swivel tray for a swivel chair according to claim 5, wherein: the shock absorption pads (53) are silica gel columns fixed on two sides in the positioning groove (52), and the outer contour of the reset bearing (65) is in rolling connection with the positioning groove (52) and is in elastic contact with the silica gel columns.

8. The automatic swivel tray for a swivel chair according to claim 1 or 2, characterized in that: the upper through hole (11) is a flanging hole, and the upper bracket (12) is positioned in the flanging hole.

9. The automatic swivel tray for a swivel chair according to claim 1 or 2, characterized in that: the side wall of the lower bracket (31) is a convex ring (32) formed by extending the inner surface of the lower supporting plate (3) upwards, the lower bearing (22) is clamped in the convex ring (32), and the bottom of the eccentric wheel (5) is sunken to form a lower wheel cavity (54) capable of accommodating the convex ring (32) and the lower bearing (22).