Swivel chair chassis with free lifting function

Abstract

The utility model relates to the technical field of swivel chair chassis, in particular to a swivel chair chassis with a free lifting function, which comprises a swivel chair chassis main body, a support plate is arranged at the top end of the swivel chair chassis main body, the support plate is connected with the swivel chair chassis main body through an auxiliary support mechanism, and an extension adjusting mechanism is arranged on the support plate. A support is arranged at the bottom end of the supporting plate, a connecting ball is arranged at the bottom end of the support, the connecting ball and the swivel chair chassis body are arranged in a clamped and embedded mode, the auxiliary supporting mechanism comprises a connecting plate arranged at the top end of the swivel chair chassis body, an outer rod is arranged on the connecting plate in a penetrating mode, and an inner rod is arranged in the outer rod. The device can adapt to installation of swivel chair cushions with different sizes, and the universality of the device is improved; by taking the connecting ball as the center and through the connecting effect of the auxiliary supporting mechanism, the bearing capacity of the swivel chair chassis main body 1 is further improved, the use stability of the swivel chair chassis main body 1 is improved, and the service life of the swivel chair chassis main body 1 is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of swivel chair chassis, in particular to a swivel chair chassis with a free lifting function. Background Art

[0002] Chairs are essential household furniture in people's daily lives and are widely used in families. There are many types of existing chairs, among which swivel chairs are a type of chair that is often used in daily offices. The composition of a swivel chair includes a swivel chair chassis, a lifting support rod, a seat cushion, etc. The swivel chair chassis is an important component installed under the swivel chair seat cushion. The lifting and lowering of the seat cushion and the adjustment of the tilt angle of the backrest are all completed by the chassis;

[0003] The following deficiencies exist in the prior art solution: the supporting stability of the swivel chair chassis is mainly increased by the connecting part and the mounting part, but since the connecting part and the limit plate are fixedly connected, the mounting part can only be installed for a seat cushion of a single size. When seat cushions of different sizes need to be installed, the chassis size needs to be replaced, thereby reducing the application range of the swivel chair chassis and increasing its actual use cost. At the same time, the seat seat is fixed in a horizontal position. When the user wants to tilt the body, the seat cannot tilt with the body, which will make the user feel uncomfortable. In addition, the service life of the seat is affected when it is twisted for a long time. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the support surface of the swivel chair chassis is limited and cannot be installed according to cushions of different sizes. At the same time, when the user needs to lean his body, the horizontal fixed setting of the seat reduces the comfort, and the service life of the seat is affected when it is twisted.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is: a swivel chair chassis with a free lifting function, including a swivel chair chassis body, a support plate is provided at the top of the swivel chair chassis body, the support plate and the swivel chair chassis body are connected by an auxiliary support mechanism, an extension adjustment mechanism is provided on the support plate, characterized in that a bracket is provided at the bottom end of the support plate, a connecting ball is provided at the bottom end of the bracket, the connecting ball and the swivel chair chassis body are in a card-embedded arrangement, the auxiliary support mechanism includes a connecting plate arranged at the top end of the swivel chair chassis body, an outer rod is penetrated on the connecting plate, an inner rod is provided inside the outer rod, a top plate is provided at the top end of the inner rod, a spring is provided on the outer wall of the outer rod, and the connecting plate is connected to the swivel chair chassis body by a threaded nail.

[0006] As an improvement, a collar is provided at the top of the connecting plate, and the bottom of the spring is sleeved on the outer wall of the collar.

[0007] As an improvement, the length of the inner rod is shorter than that of the outer rod, a card is provided at the bottom end of the outer rod, and a card slot matching the card is provided on the chassis body of the swivel chair.

[0008] As an improvement, the extension adjustment mechanism includes two extension plates arranged in the support plate, the support plate is provided with a limiting groove matching the extension plate, and baffles are provided on opposite sides of the two extension plates.

[0009] As an improvement, the support plate is provided with a first positioning hole, and the extension plate is provided with a plurality of second positioning holes.

[0010] As an improvement, the top end of the spring is connected to the bottom of the top plate, and the lower end is connected to the top of the connecting plate.

[0011] As an improvement, a circular groove is provided in the middle of the top of the swivel chair chassis body, the connecting ball is arranged in the circular groove, and a mounting groove is provided at the bottom of the swivel chair chassis body.

[0012] The advantages of the utility model compared with the existing technology are:

[0013] 1. By extending the setting of the adjustment mechanism, the device can be adapted to the installation of swivel chair cushions of different sizes, thereby improving the versatility of the utility model;

[0014] Second, with the connecting ball as the center, the connecting function of the auxiliary support mechanism is used to further improve the bearing capacity of the human body when sitting and tilting, improve the comfort of the swivel chair chassis, and help extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a structural schematic diagram of a swivel chair chassis with a free lifting function.

[0016] Figure 2 It is a schematic diagram of another side of a swivel chair chassis with a free lifting function of the utility model.

[0017] Figure 3 It is a structural schematic diagram of the auxiliary supporting mechanism of the utility model.

[0018] Figure 4 It is an exploded view of the auxiliary support mechanism of the utility model.

[0019] Figure 5 It is a structural schematic diagram of the extension plate of the utility model.

[0020] As shown in the figure: 1. Swivel chair chassis body; 2. Bracket; 3. Connecting ball; 4. Auxiliary supporting mechanism; 5. Support plate; 6. Extension plate; 7. Baffle; 101. Round groove; 401. Connecting plate; 402. Threaded nail; 403. Card; 404. Outer rod; 405. Spring; 406. Top plate; 407. Inner rod; 408. Ring; 501. Limiting groove; 502. Positioning hole 1; DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The present application fully explains the problems of the prior art in the technical background, and there are no superordinate or general problems. The problems to be solved by the present application are described in detail in the following utility model content and specific implementation methods, the technical problems to be solved by the technical scheme are clarified, and it is determined that the technical scheme of the present application has beneficial effects relative to the objective prior art.

[0023] See also Figure 1-Figure 5 , an embodiment provided by the utility model:

[0024] A swivel chair chassis with a free lifting function, comprising a swivel chair chassis body 1, a support plate 5 is provided at the top of the swivel chair chassis body 1, the support plate 5 and the swivel chair chassis body 1 are connected through an auxiliary support mechanism 4, an extension adjustment mechanism is provided on the support plate 5, a bracket 2 is provided at the bottom of the support plate 5, a connecting ball 3 is provided at the bottom of the bracket 2, the connecting ball 3 and the swivel chair chassis body 1 are embedded in each other, the auxiliary support mechanism 4 comprises a connecting plate 401 arranged at the top of the swivel chair chassis body 1, the connecting plate 40 1 is penetrated by an outer rod 404, and an inner rod 407 is arranged inside the outer rod 404. It should be noted that a gap is left between the inner rod 407 and the outer rod 404, that is, the diameter of the inner rod 407 is half of the diameter of the outer rod 404, so that when one corner of the support plate 5 is tilted, the auxiliary support mechanism 4 as a whole can be contracted or opened and tilted accordingly; a top plate 406 is arranged on the top of the inner rod 407, and a spring 405 is arranged on the outer wall of the outer rod 404. The connecting plate 401 is connected to the swivel chair chassis body 1 through a screw 402. Figure 2 A circular groove 101 is provided in the middle of the top of the swivel chair chassis body 1, and the connecting ball 3 is arranged in the circular groove 101. A mounting groove is provided at the bottom of the swivel chair chassis body 1.

[0025] Combined with Figure 3-Figure 4 , a collar 408 is provided at the top of the connecting plate 401, and the bottom of the spring 405 is sleeved on the outer wall of the collar 408; the length of the inner rod 407 is shorter than the length of the outer rod 404, and a card 403 is provided at the bottom of the outer rod 404. A card slot matching the card 403 is provided on the swivel chair chassis body 1, and the top of the spring 405 is connected to the bottom of the top plate 406, and the lower end is connected to the top of the connecting plate 401, so as to achieve the stability of the auxiliary support mechanism 4;

[0026] Combined with Figure 5 The extension adjustment mechanism includes two extension plates 6 arranged in the support plate 5, and a limiting groove 501 matching the extension plate 6 is opened in the support plate 5. Baffles 7 are provided on the opposite sides of the two extension plates 6. In order to increase the fixity between the extension plate 6 and the support plate 5, a positioning hole 1 502 is provided on the support plate 5, and a plurality of positioning holes 2 are provided on the extension plate 6.

[0027] During actual use, the above structure is connected to the external lifting cylinder through the installation groove at the bottom end of the swivel chair chassis body 1 to achieve the supporting effect of the swivel chair chassis body 1; when installing the swivel chair cushion, the extension plate is pulled out from the limiting groove 501, and the length of the extension plate 6 is pulled out according to the diameter of the swivel chair cushion to expand the bearing surface of the swivel chair chassis body 1. Specifically, the inner side of the baffle plate 7 is tangent to the outer edge of the swivel chair cushion to achieve the clamping effect of the swivel chair cushion, and finally the threaded nail is passed through the positioning hole 502 to achieve the installation effect of the swivel chair cushion. By adjusting the position of the extension plate 6, the support area between the entire swivel chair chassis body 1 and the swivel chair cushion is further increased, thereby improving the connection stability between the two. At the same time, through the setting of the auxiliary support mechanism 4, when When the user needs to tilt his body while sitting on the swivel chair cushion, with the connecting ball 3 as the center, one side of the support plate 5 is affected by the downward pressure of gravity, and part of the inner rod 407 enters more into the outer rod 404. At the same time, the spring 405 is forced to shrink. As one corner of the support plate 5 is affected by the force, the bottom end of the inner rod 407 is buckled against the inner wall of the outer rod 404 to limit the downward movement of the inner rod 407. Because there is a gap between the outer rod 404 and the inner rod 407, the inner rod 407 and the outer rod 404 are tilted, and the auxiliary support mechanism 4 shrinks to tilt the support plate 5. The auxiliary support mechanisms 4 on the other three sides extend or shorten the tilt according to the force situation in turn, completing the traction effect on the chassis body 1 of the swivel chair, which helps to improve the overall service life of the subsequent seat.

[0028] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope of the present application is indicated by the claims.

[0029] It should be understood that the present application is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present application do not constitute a limitation on the scope of protection of the present application.

Claims

1. A swivel chair chassis with a free lifting function, comprising a swivel chair chassis body (1), a support plate (5) is provided at the top of the swivel chair chassis body (1), the support plate (5) and the swivel chair chassis body (1) are connected via an auxiliary support mechanism (4), an extension adjustment mechanism is provided on the support plate (5), and the characteristics are: A bracket (2) is provided at the bottom end of the support plate (5), a connecting ball (3) is provided at the bottom end of the bracket (2), and the connecting ball (3) is embedded with the swivel chair chassis body (1). The auxiliary support mechanism (4) comprises a connecting plate (401) arranged at the top end of the swivel chair chassis body (1), an outer rod (404) is passed through the connecting plate (401), an inner rod (407) is provided inside the outer rod (404), a top plate (406) is provided at the top end of the inner rod (407), a spring (405) is provided on the outer wall of the outer rod (404), and the connecting plate (401) is connected to the swivel chair chassis body (1) through a screw nail (402).

2. The swivel chair chassis with free lifting function according to claim 1, characterized in that: A collar (408) is provided at the top of the connecting plate (401), and the bottom of the spring (405) is sleeved on the outer wall of the collar (408).

3. The swivel chair chassis with free lifting function according to claim 1, characterized in that: The length of the inner rod (407) is shorter than that of the outer rod (404); a card (403) is provided at the bottom end of the outer rod (404); and a card slot matching the card (403) is provided on the swivel chair chassis body (1).

4. The swivel chair chassis with free lifting function according to claim 1, characterized in that: The extension adjustment mechanism comprises two extension plates (6) arranged in the support plate (5), a limiting groove (501) matching the extension plates (6) is provided in the support plate (5), and baffles (7) are provided on opposite sides of the two extension plates (6).

5. The swivel chair chassis with free lifting function according to claim 4, characterized in that: The support plate (5) is provided with a first positioning hole (502), and the extension plate (6) is provided with a plurality of second positioning holes.

6. The swivel chair chassis with free lifting function according to claim 1, characterized in that: The top end of the spring (405) is connected to the bottom of the top plate (406), and the lower end is connected to the top of the connecting plate (401).

7. The swivel chair chassis with free lifting function according to claim 1, characterized in that: A circular groove (101) is provided in the middle of the top of the swivel chair chassis body (1), the connecting ball (3) is arranged in the circular groove (101), and a mounting groove is provided at the bottom of the swivel chair chassis body (1).

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