Seat bottom tray capable of flexibly replacing rollers

Abstract

The utility model provides a seat bottom tray capable of flexibly replacing rollers, which is characterized in that the seat bottom tray comprises a middle bottom tray body and roller assemblies, the bottom tray body comprises a central body, a plurality of cantilevers are arranged in the circumferential direction of the central body, and connecting holes are formed in one ends, far away from the central body, of the cantilevers; a connecting shaft is arranged on the roller assembly, an annular protrusion is arranged on the side face of the connecting shaft, and an annular groove matched with the annular protrusion is formed in the inner wall of the connecting hole. The cantilever is further provided with a dismounting mechanism, and the dismounting mechanism is used for applying jacking force to one end of the connecting shaft so that the annular protrusion on the connecting shaft can be disengaged from the annular groove. According to the roller assembly, the roller assembly is easy to mount and dismount, no extra tool is needed in the mounting and dismounting process, replacement of the roller assembly is greatly facilitated, and a user can quickly complete replacement of the roller assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to chair technical field, especially a kind of seat bottom tray of flexible replacement gyro wheel. BACKGROUND

[0002] The lower end of the bottom tray of some existing office chairs is provided with a plurality of gyro wheels, which can ensure the flexible movement of the chair and facilitate the use of the chair.

[0003] As a load-bearing and moving component, the gyro wheel is prone to damage during long-term use of the chair, and therefore needs to be replaced.

[0004] However, the gyro wheel mounting structure in some existing chairs is often not reasonably designed, making the replacement of the gyro wheel a relatively troublesome task. For example, in some chairs, the gyro wheel is connected by bolts, screws, clamping springs and other connecting components. In this installation mode, the installation and disassembly of the gyro wheel often require the use of tools such as screwdrivers, wrenches and clamping spring pliers. If these tools are not available, the gyro wheel cannot be replaced, which brings great inconvenience to the replacement of the gyro wheel. SUMMARY

[0005] The utility model aims at solving the deficiency in prior art, and provides a seat bottom tray with flexible replacement gyro wheel.

[0006] The utility model aims at solving the deficiency in prior art, and provides a seat bottom tray with flexible replacement gyro wheel.

[0007] Preferably, the dismounting mechanism includes a support seat arranged on the cantilever above the connecting hole, a cam, a rotating shaft and a top block. The cam is rotatably connected to the support seat by the rotating shaft. A rotating handle is arranged on the cam. The top block is arranged at the upper end of the connecting hole and located between the cam and the connecting shaft.

[0008] Preferably, the connecting hole is a stepped hole, which includes an upper hole body and a lower hole body. The hole diameter of the upper hole body is larger than that of the lower hole body. The top block is arranged in the upper hole body.

[0009] Preferably, a magnetic component is arranged on the rotating handle, and a magnet corresponding to the magnetic component is arranged on the cantilever.

[0010] Preferably, the magnetic member is made of iron.

[0011] Preferably, the cam is a cylindrical structure, and the rotating shaft is eccentrically arranged on the cam.

[0012] Preferably, five cantilevers are uniformly arranged in the circumferential direction of the center body.

[0013] The beneficial effects of the present application are as follows: In the present application, the installation and disassembly of the roller assembly are relatively simple, and no additional tools are required during the installation and disassembly process, greatly facilitating the replacement of the roller assembly, and enabling the user to quickly complete the replacement of the roller assembly. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The figure is a structural schematic view of the present application.

[0015] Figure 2 The figure is a structural schematic view of the roller assembly.

[0016] Figure 3 The figure is a partial sectional view of the present application.

[0017] Figure 4 The figure is a partial sectional view of the present application. Figure 3 The figure is an enlarged view of part A.

[0018] In the figure: 1, bottom tray body, 1-1, center body, 1-2, cantilever, 2, roller assembly, 2-1, connecting shaft, 2-2, annular protrusion, 3, support seat, 4, cam, 5, rotating handle, 6, rotating shaft, 7, top block, 8, magnet, 9, magnetic member. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0020] As Figures 1 to 4As shown, a seat bottom tray with replaceable rollers includes a bottom tray body 1 and a roller assembly 2. The bottom tray body 1 includes a center body 1-1, and a plurality of cantilever arms 1-2 are arranged in the circumferential direction of the center body 1-1. The end of the cantilever arm 1-2 away from the center body 1-1 is provided with a connecting hole. The roller assembly 2 is provided with a connecting shaft 2-1, and the side of the connecting shaft 2-1 is provided with an annular protrusion 2-2. The inner wall of the connecting hole is provided with an annular groove matched with the annular protrusion 2-2. The cantilever arm 1-2 is further provided with a dismounting mechanism for applying a thrust force to one end of the connecting shaft 2-1 to make the annular protrusion 2-2 on the connecting shaft 2-1 disengage from the annular groove.

[0021] In the utility model, when installing the roller assembly 2, only need to insert the connecting shaft 2-1 on the roller assembly 2 into the connecting hole, make the annular protrusion 2-2 on the connecting shaft 2-1 be clamped into the annular groove on the inner wall of the connecting hole, thereby the installation of the roller assembly 2 is realized. When replacing the roller assembly 2, the damaged roller assembly 2 on the cantilever arm 1-2 needs to be dismounted first, and then the new roller assembly 2 is installed on the cantilever arm 1-2. Considering that the cooperation between the annular protrusion 2-2 and the annular groove causes the connecting shaft 2-1 on the roller assembly 2 to be difficult to pull out from the connecting hole when dismounting the roller, the utility model is provided with the dismounting mechanism on the cantilever arm 1-2, and a thrust force is applied to one end of the connecting shaft 2-1 by the dismounting mechanism to make the annular protrusion 2-2 on the connecting shaft 2-1 disengage from the annular groove. After the annular protrusion 2-2 disengages from the annular groove, the connecting shaft 2-1 can be pulled out from the connecting hole more easily, thereby the dismounting of the roller assembly 2 is facilitated.

[0022] In the embodiment, the bottom tray body 1 is made of high-strength engineering plastic as a whole, and the connecting shaft 2-1 is made of steel.

[0023] In the embodiment, five cantilever arms 1-2 are evenly arranged in the circumferential direction of the center body 1-1.

[0024] Specifically, the dismounting mechanism includes a supporting seat 3 arranged on the cantilever arm 1-2 and located above the connecting hole, a cam 4, a rotating shaft 6, and a top block 7. The cam 4 is rotationally connected to the supporting seat 3 through the rotating shaft 6, and a rotating handle is arranged on the cam 4. The top block 7 is arranged at the upper end of the connecting hole and located between the cam 4 and the connecting shaft 2-1. The cam 4 is a cylindrical structure, and the rotating shaft 6 is eccentrically arranged on the cam 4. The rotating shaft 6 is rotationally connected to the supporting seat 3. The connecting hole is a stepped hole including an upper hole body and a lower hole body, and a stepped surface is formed between the upper hole body and the lower hole body. The diameter of the upper hole body is larger than that of the lower hole body, and the top block 7 is arranged in the upper hole body.

[0025] When the roller assembly 2 is in the mounted state, the lower end of the upper end of the connecting shaft 2-1 is supported by the top block 7; when the roller assembly 2 is disassembled, the rotating handle 5 is first rotated, the rotating handle 5 drives the cam 4 to rotate, the cam 4 contacts the upper end of the top block 7 and exerts downward pressure on the top block 7 when rotating, and the connecting shaft 2-1 is moved downward by a certain distance under the action of the pressure, so that the annular protrusion 2-2 on the connecting shaft 2-1 is separated from the annular groove.

[0026] Further, the rotating handle 5 is provided with a magnetic attraction piece 9, and the cantilever 1-2 is provided with a magnet 8 corresponding to the magnetic attraction piece 9. When the rotating handle 5 is not in use, the rotating handle 5 is rotated to a near-horizontal state (as shown in Figure 1 , at this time the magnet 8 attracts the magnetic attraction piece 9 on the rotating handle 5, thereby fixing the rotating handle 5.

[0027] In the embodiment, the magnetic attraction piece 9 is made of iron.

[0028] In the utility model, the installation and disassembly of the roller assembly 2 are relatively simple, and any additional tool is not needed in the installation and disassembly process, so that the replacement of the roller assembly 2 is greatly facilitated, and the user can quickly complete the replacement of the roller assembly 2.

[0029] The utility model is not limited to the above-mentioned best implementation, and anyone can derive other various forms of products under the inspiration of the utility model, but no matter any change in shape or structure, any technical scheme with the same or similar application as the utility model falls within the protection scope of the utility model.

Claims

1. A seat bottom tray with flexible roller replacement, characterized by, The sole tray body comprises a center body, and a plurality of cantilever arms are arranged in the circumferential direction of the center body, and a connecting hole is arranged at the end of the cantilever arm away from the center body; the roller assembly is provided with a connecting shaft, and a ring-shaped protrusion is arranged on the side surface of the connecting shaft; a ring-shaped groove matched with the ring-shaped protrusion is arranged on the inner wall of the connecting hole; a dismounting mechanism is further arranged on the cantilever arm, and the dismounting mechanism is used for applying a pushing force to one end of the connecting shaft to make the ring-shaped protrusion on the connecting shaft separate from the ring-shaped groove.

2. A seat bottom tray with flexible roller replacement according to claim 1, characterized in that The dismounting mechanism comprises a supporting seat arranged on the cantilever arm and located above the connecting hole, a cam, a rotating shaft and a top block, the cam is rotationally connected to the supporting seat through the rotating shaft, a rotating handle is arranged on the cam, and the top block is arranged at the upper end of the connecting hole and located between the cam and the connecting shaft.

3. A seat bottom tray with flexible roller replacement according to claim 2, wherein, The connecting hole is a stepped hole, and the connecting hole comprises an upper hole body and a lower hole body, the hole diameter of the upper hole body is larger than the hole diameter of the lower hole body; and the top block is arranged in the upper hole body.

4. The seat bottom tray with flexible roller replacement of claim 2, wherein, A magnetic attraction piece is arranged on the rotating handle, and a magnet corresponding to the magnetic attraction piece is arranged on the cantilever arm.

5. A seat bottom tray with flexible roller replacement according to claim 4, wherein, The magnetic attraction piece is made of iron.

6. The seat bottom tray with flexible roller replacement of claim 2, wherein, The cam is a cylindrical structure, and the rotating shaft is eccentrically arranged on the cam.

7. The seat bottom tray with flexible roller replacement of claim 1, wherein, Five cantilever arms are uniformly arranged in the circumferential direction of the center body.

Images