Chair with automatic self-righting function and fixing mechanism

Abstract

The present invention provides a chair with an automatic self-aligning function and a fixing mechanism. Among them, the fixing mechanism includes a seat plate mounting seat, an automatic reset rotary shaft, and a locking mechanism; the seat plate mounting seat is provided with a card slot and a shaft hole that is axially vertical and communicates with the card slot; the top of the automatic reset rotary shaft is inserted into the shaft hole and is connected with the shaft hole in a mating manner; the locking mechanism includes a connecting screw, a clamping portion, and a connecting portion; the clamping portions are respectively fixed on both sides of the top end of the connecting portion and are clamped in the card slot; the bottom end of the connecting portion is provided with an inclined surface, the bottom of the connecting portion is inserted into the shaft hole, and the top of the automatic reset rotary shaft is in mating connection with the inclined surface; the connecting screw passes through the connecting portion and is in threaded connection with the automatic reset rotary shaft. This fixing mechanism has a novel structure, good versatility, and strong locking effect, and can ensure that the seat plate can be accurately self-aligned. The chair includes the fixing mechanism, a seat plate, and a base; the seat plate mounting seat is fixedly connected to the bottom surface of the seat plate; the bottom of the automatic reset rotary shaft is fixedly connected to the base.

Description

Technical Field

[0001] The present invention belongs to the technical field of chairs, and particularly relates to a chair with an automatic return function and a fixing mechanism. Background Art

[0002] At present, swivel chairs on the market can achieve lifting and rotation, are simple to use and convenient to operate, and are suitable for use in occasions such as bars, offices, schools, and families. Although having both lifting and rotation functions, the seat surface of the swivel chair can freely rotate 360° relative to the chair legs, which is very convenient. However, when the human body leaves after rotation, the seat surface still remains in the state after rotation is completed and will not automatically return to the set position (or automatic return).

[0003] With the development of technology, swivel chairs that can automatically rotate and reset have been developed. For example, the invention patent with the patent application number: 201520557103.8 discloses a swivel chair automatic reset rotating shaft, which can achieve automatic return to the set position.

[0004] Existing lift seats generally adopt a seat plate chassis as shown in Figure 3 The seat plate chassis is provided with through holes for installing air springs. By directly inserting the air springs into the through holes, the seat plate can be effectively supported, enabling the seat plate to lift and rotate 360° relative to the air springs. However, how to effectively utilize the automatic reset rotating shaft and combine it with the seat plate chassis of the lift seat, so that the automatic reset rotating shaft can be quickly, simply and stably fixed to the seat plate chassis, tightly and firmly, in order to achieve an excellent return effect, is a current problem.

[0005] It can be seen that the existing technology still needs to be improved. Summary of the Invention

[0006] In view of the deficiencies of the above-mentioned existing technology, one of the purposes of the present invention is to provide a fixing mechanism for connecting the base and the seat plate, which effectively utilizes the seat plate chassis of the current lift seat, is simple to disassemble and assemble, has a strong locking effect, good versatility, and can achieve a better automatic return function.

[0007] In order to achieve one of the above purposes, the present invention adopts the following technical solutions:

[0008] A fixing mechanism includes a seat plate mounting seat for connecting a seat plate and an automatically resetting rotating shaft. Among them, the fixing mechanism further includes a locking mechanism; the seat plate mounting seat is provided with a card slot and a shaft hole that is axially vertical and communicates with the card slot; the top of the automatically resetting rotating shaft is inserted into the shaft hole and is connected with the shaft hole in a matching manner; the locking mechanism includes a connecting screw, a clamping portion, and a connecting portion; the clamping portions are respectively fixed on both sides of the top end of the connecting portion and are clamped in the card slot; the bottom end of the connecting portion is provided with an inclined surface, the bottom of the connecting portion is inserted into the shaft hole, and the top of the automatically resetting rotating shaft is in contact with the inclined surface in a matching manner; the connecting screw passes through the connecting portion and is threadedly connected with the automatically resetting rotating shaft.

[0009] In the fixing mechanism, the seat plate mounting seat is the seat plate chassis of a lift chair.

[0010] In the fixing mechanism, the connecting screw is an internal hexagonal screw.

[0011] In the fixing mechanism, the clamping portion is provided with a limit screw that is vertically arranged and fixedly connected thereto, and the limit screw is clamped in the card slot.

[0012] In the fixing mechanism, the connecting portion is provided with a through hole that is vertically arranged, the connecting screw passes through the through hole, and the top of the automatically resetting rotating shaft is provided with a connecting screw hole for connecting with the connecting screw.

[0013] In addition, the second object of the present invention is to provide a chair with an automatic return function, which has a simple structure, is convenient to install, and has a good return effect.

[0014] In order to achieve the second object, the present invention adopts the following technical solutions:

[0015] The present invention also provides a chair with an automatic return function, which includes the fixing mechanism as described above, a seat plate, and a base; the seat plate mounting seat is fixedly connected to the bottom surface of the seat plate; the bottom of the automatically resetting rotating shaft is fixedly connected to the base.

[0016] In the chair with an automatic return function, the chair is provided with a backrest.

[0017] Beneficial effects:

[0018] The present invention provides a chair with an automatic return function and a fixing mechanism, which has a simple and unique structure, is easy to install, provides a strong locking effect, realizes the automatic return function, and has a good return effect.

[0019] The present invention effectively utilizes the existing seat board chassis of a lifting seat. On this basis, a fixing mechanism with strong locking function and easy installation is designed to connect the seat board chassis and the base. It has good versatility and completely eliminates the need to design a suitable seat board chassis and the mold for manufacturing the seat board chassis, greatly reducing the operating costs of production enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. is a schematic structural view of the connection between the automatic reset rotary shaft and the locking mechanism in the fixing mechanism provided by the present invention.

[0021] Figure 2 FIG. is a schematic structural view of the connection between the locking mechanism and the seat board mounting seat in the fixing mechanism provided by the present invention.

[0022] Figure 3 FIG. is a three-dimensional view of the structure of the seat board mounting seat in the fixing mechanism provided by the present invention.

[0023] Figure 4 FIG. is a working schematic view of the locking mechanism in the fixing mechanism provided by the present invention.

[0024] Figure 5 FIG. is a three-dimensional view of the structure of the chair with an automatic self-righting function provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The present invention provides a chair and a fixing mechanism with an automatic self-righting function. To make the objectives, technical solutions and effects of the present invention clearer and more definite, the following further describes the present invention in detail with reference to the accompanying drawings and by way of examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] Please refer to Figure 1 、 Figure 2 、 Figure 5 The present invention provides a fixing mechanism, including a seat board mounting seat 3 for connecting the seat board 12 and an automatic reset rotary shaft 2. Among them, the fixing mechanism further includes a locking mechanism 4.

[0027] As Figure 3 shown, the seat board mounting seat 3 is provided with a card slot 31 and a shaft hole 32 that is communicated with the card slot 31 and is vertically axially. Specifically, the seat board mounting seat 3 is the existing seat board chassis of a lifting seat, which is installed under the seat board 12 to support the seat board, as Figure 5 shown. Of course, it can also be other types of seat board chassis with shaft holes and card slots.

[0028] As Figure 3 、 Figure 5As shown in the figure, the top of the automatic reset swivel shaft 2 is inserted into the shaft hole 32 and is connected to the shaft hole 32 in a mating manner. The inner diameter of the shaft hole 32 is appropriately sized to match the outer diameter of the top of the automatic reset swivel shaft 2. After the automatic reset swivel shaft 2 is inserted into the shaft hole 32, the seat plate mounting seat 3 can only rotate along the automatic reset swivel shaft 2 without horizontal wobbling.

[0029] As Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown in the figure, the locking mechanism 4 includes a connecting screw 41, a clamping portion 43, and a connecting portion 42; the clamping portions 43 are respectively fixed on both sides of the top end of the connecting portion 42 and are clamped in the card slots 31; a slope 47 is provided at the bottom end of the connecting portion 42, the bottom of the connecting portion 42 is inserted into the shaft hole 32, and the connecting end 21 at the top of the automatic reset swivel shaft 2 is in mating contact with the slope 47. That is, after the connecting screw 41 connects the connecting portion 42 and the automatic reset swivel shaft 2, the slope 47 is in close contact with the slope 22 provided at the connecting end 21 at the top of the automatic reset swivel shaft 2. The connecting screw 41 passes through the connecting portion 41 and is threadedly connected to the automatic reset swivel shaft 2.

[0030] The projection of the connecting portion 41 on the horizontal plane is circular, and its diameter is smaller than that of the shaft hole 32, which facilitates the insertion of the connecting portion 42 into the shaft hole 32 and reduces the disassembly and assembly difficulty. In addition, a groove (not shown in the figure) is provided at the top of the automatic reset swivel shaft 2, and the connecting end 21 of the automatic reset swivel shaft 2 is located in the groove, and the connecting portion 42 is correspondingly inserted into the groove to be connected to the connecting end 21, hiding the connection between the automatic reset swivel shaft 2 and the connecting portion 42 in the groove.

[0031] Slopes 47 and 22 are respectively provided at the connection between the connecting portion 42 and the automatic reset swivel shaft 2, which increases the contact area, thereby increasing the friction force, facilitating strengthening the connection between the connecting portion 42 and the automatic reset swivel shaft 2, preventing the rotation and loosening between the connecting portion 42 and the automatic reset swivel shaft 2 from reducing the return effect, and eliminating the need for troublesome hole alignment during installation. When the slopes 47 and 22 are in close contact, the hole alignment is completed, facilitating the insertion of the connecting screw into the connecting portion 42 and screwing it into the connecting end 21, reducing the installation difficulty.

[0032] The present invention adopts a fixing mechanism with a unique structure and fixedly connects it to the existing seat plate mounting seat 3. It not only has a good locking effect, is easy to manufacture and install, but also has good versatility, eliminating the need to design a suitable seat plate mounting seat and corresponding manufacturing molds, greatly reducing the production cost of the enterprise.

[0033] As Figure 1 , Figure 4As shown, specifically, the connecting portion 42 is provided with a vertically arranged through hole 44, the connecting screw 41 is inserted through the through hole 44, and the top of the automatic reset swing shaft 2 is provided with a connecting screw hole (not shown in the figure) connected to the connecting screw 41.

[0034] As Figure 2 shown, specifically, the connecting screw 41 is an internal hexagonal screw. An internal hexagonal wrench is used to turn the connecting screw, which is labor-saving and convenient, and can speed up the installation speed. Of course, it can also be other types of screws, such as external hexagonal screws.

[0035] As Figure 2 shown, the clamping portion 43 is provided with a limit screw 45 arranged vertically and fixedly connected thereto, and the limit screw 45 is clamped in the card slot 31.

[0036] As Figure 1 、 Figure 2 、 Figure 3 shown, after inserting the top of the automatic reset swing shaft 2 into the shaft hole 32, insert the connecting portion 42 into the shaft hole 32 and place the clamping portion 43 in the card slot 31, and use the connecting screw 41 to realize the connection between the automatic reset swing shaft 2 and the connecting portion 42; then use the limit screw 45, screw it into the connecting hole 46 provided in the clamping portion 43, and the edge of the limit screw 45 is in contact with the inner wall surface of the card slot 31, realizing that the clamping portion 43 is clamped in the card slot 31, thereby ensuring that the seat plate mounting seat 3 can drive the locking mechanism 4 to rotate simultaneously. Moreover, since a strong locking effect is established between the locking mechanism 4 and the top of the automatic reset swing shaft 2, the top of the automatic reset swing shaft 2 will rotate synchronously with the seat plate mounting seat 3. After the person leaves, it will automatically rotate in the reverse direction and reset.

[0037] As Figure 5 shown, on the other hand, the present invention also provides a chair with an automatic return function, which includes the fixing mechanism as described above, as well as a seat plate 12 and a base (not shown in the figure); the seat plate mounting seat 3 is fixedly connected to the bottom surface of the seat plate 12 by bolts; the bottom of the automatic reset swing shaft 2 is fixedly connected to the base. In this embodiment, the chair has no backrest and can be used in places such as bars.

[0038] Specifically, the chair is provided with a backrest 11. In this embodiment, the chair can be applied to teaching places, offices and other occasions.

[0039] The chair provided by the present invention adopts the fixing mechanism as described above and has an automatic return function. After rotation, it can automatically return to its original position.

[0040] In summary, the present invention provides a chair and a fixing mechanism with an automatic self-aligning function, which have a simple and unique structure, are easy to install, provide a strong locking effect, realize the automatic self-aligning function, and have a good self-aligning effect.

[0041] The present invention effectively utilizes the seat plate chassis of the existing lift chair, and on this basis, designs a fixing mechanism with characteristics such as a strong locking effect and easy installation to connect the seat plate chassis and the base. It has good versatility and completely eliminates the need to design a suitable seat plate chassis and the mold for manufacturing the seat plate chassis, greatly reducing the operating costs of production enterprises.

[0042] It can be understood that for those of ordinary skill in the art, equivalent substitutions or changes can be made according to the technical solutions and inventive concepts of the present invention, and all such changes or substitutions should fall within the protection scope of the appended claims of the present invention.

Claims

1. A fixing mechanism, comprising a seat plate mounting seat for connecting a seat plate and an automatically resetting swivel shaft, characterized in that, the fixing mechanism further comprises a locking mechanism; the seat plate mounting seat is provided with a card slot and a shaft hole that communicates with the card slot and is vertically axially; the top of the automatically resetting swivel shaft is inserted into the shaft hole and is connected in cooperation with the shaft hole; the locking mechanism comprises a connecting screw, a clamping portion, and a connecting portion; the clamping portions are respectively fixed on both sides of the top end of the connecting portion and are clamped in the card slot; a slope is provided at the bottom end of the connecting portion, the bottom of the connecting portion is inserted into the shaft hole, and the top of the automatically resetting swivel shaft is in contact with the slope in cooperation; the connecting screw passes through the connecting portion and is threadedly connected to the automatically resetting swivel shaft.

2. The fixing mechanism according to claim 1, characterized in that, the seat plate mounting seat is the seat plate chassis of a lift chair.

3. The fixing mechanism according to claim 1, characterized in that, the connecting screw is an internal hexagonal screw.

4. The fixing mechanism according to claim 1, characterized in that, the clamping portion is provided with a limiting screw vertically arranged and fixedly connected thereto, and the limiting screw is clamped in the card slot.

5. The fixing mechanism according to claim 1, characterized in that, the connecting portion is provided with a vertically arranged through hole, the connecting screw passes through the through hole, and the top of the automatically resetting swivel shaft is provided with a connecting screw hole connected to the connecting screw.

6. A chair with an automatic self-righting function, characterized in that, it comprises the fixing mechanism according to any one of claims 1 to 5, a seat plate, and a base; the seat plate mounting seat is fixedly connected to the bottom surface of the seat plate; the bottom of the automatically resetting swivel shaft is fixedly connected to the base.

7. The chair with an automatic self-righting function according to claim 6, characterized in that, the chair is provided with a backrest.

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