A dental sandblasting machine sand bottle sealing device

Abstract

The utility model discloses a dental sandblasting machine sand bottle sealing device. It relates to the field of sandblasting machines. It comprises an outer cover and an inner pad, wherein the inner pad is fixed in the outer cover and a sealing ring is arranged between the inner pad and the outer cover, and the cross section of the inner pad is arched. When the outer cover is closed on the sand bottle, the outer cover presses the inner pad, and the inner pad pushes the sealing ring to press against the inner wall of the sand bottle. It has the effect of improving the sealing performance of the sand bottle.

Description

Technical Field

[0001] The utility model relates to the field of sandblasting machines, in particular to a sand bottle sealing device for a dental sandblasting machine. Background Art

[0002] The sandblasting machine uses high-pressure airflow to spray dental sand powder onto the surface of teeth, thereby cleaning the teeth. When sandblasting teeth, you need to use dental sandblasting equipment. The sand bottle is an indispensable sand tool bottle for sandblasting. You need to unscrew the lid and pour the dental sandblasting powder into it.

[0003] The sand bottle cap in the prior art needs to be twisted multiple times to tighten or twist out the sand bottle cap, which is often required, greatly affecting the bad user experience. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a sand bottle sealing device for a dental sandblasting machine.

[0005] The utility model is implemented by the following technical scheme: a dental sandblasting machine sand bottle sealing device, comprising an outer cover and an inner pad, wherein the inner pad is fixed in the outer cover and a sealing ring is arranged between the inner pad and the outer cover, the cross section of the inner pad is arched, when the outer cover is closed on the sand bottle, the outer cover squeezes the inner pad, and the inner pad pushes the sealing ring to press against the inner wall of the sand bottle.

[0006] The outer cover is threadedly connected and fixed to the sand bottle. The outer cover is provided with an external thread, and the inner cover is provided with an internal thread. The external thread is provided with at least four external thread inlets. The positions of the internal threads corresponding to the external thread inlets are provided with internal thread inlets, and the external thread inlets correspond to the internal thread inlets one by one.

[0007] A gap for inserting a sand bottle is provided between the inner pad and the outer cover, an annular groove for accommodating a sealing ring is provided at the edge of the inner pad, a limiting step is provided on the inner wall of the sand bottle, and the limiting ring is pressed against the limiting step.

[0008] The limiting step is provided with a first guide surface, and the outer wall of the annular groove is provided with a second guide surface which abuts against the first guide surface.

[0009] A gap is provided between the outer cover and the inner pad.

[0010] Compared with the prior art, the outer cover of the utility model is provided with an outer thread, the inner cover is provided with an inner thread, the outer thread is provided with at least four outer thread entrances, the inner thread is provided with an inner thread entrance at the position corresponding to the outer thread entrance, and the outer thread entrance corresponds to the inner thread entrance one by one. Specifically, both the inner thread and the outer thread have four entrances, and only a very small number of turns are required to achieve good fixation. When the outer cover is closed, the limit ring will press against the limit step. As the outer cover is tightened, the outer cover moves downward, and then a pressure can be applied to the inner pad. Since the inner pad is arched, as the inner pad is deformed by the downward pressure of the outer cover, the edge of the inner pad moves outward, and the limit ring will press against the limit step, that is, the sealing ring presses against the inner wall of the sand bottle. When in use, the pressure in the sand bottle will also push the inner pad, and finally the inner pad will continue to expand, and the sealing ring will continue to press against the inner wall of the sand bottle, thereby improving the sealing performance of the sand bottle. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0012] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model in a compressed state;

[0013] In the figure: 1. inner pad; 2. outer cover; 3. sealing ring; 4. ring groove; 5. sand bottle; 6. limiting step. DETAILED DESCRIPTION

[0014] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0015] A sealing device for a sand bottle 5 of a dental sandblasting machine includes an outer cover 2 and an inner pad 1. The inner pad 1 is fixed in the outer cover 2 and a sealing ring 3 is provided between the inner pad 1 and the outer cover 2. The cross section of the inner pad 1 is arched. When the outer cover 2 is closed on the sand bottle 5, the outer cover 2 squeezes the inner pad 1, and the inner pad 1 pushes the sealing ring 3 against the inner wall of the sand bottle 5. The outer cover 2 and the sand bottle 5 can be fixed by a threaded connection. Specifically, the outer cover 2 is provided with an external thread, and the inner cover is provided with an internal thread. The external thread is provided with at least four external thread inlets. The position of the internal thread corresponding to the external thread inlet is provided with an internal thread inlet, and the external thread inlet corresponds to the internal thread inlet one by one. Specifically, both the internal thread and the external thread have four inlets, and only a very small number of turns are required to achieve good fixation.

[0016] A gap for inserting a sand bottle is provided between the inner pad 1 and the outer cover 2. An annular groove 4 is provided at the edge of the inner pad 1 for placing the annular groove 4 of the sealing ring 3. A limiting step 6 is provided on the inner wall of the sand bottle 5, and the limiting ring is pressed against the limiting step 6. When the outer cover 2 is closed, the limiting ring will press against the limiting step 6. As the outer cover 2 is tightened, the outer cover 2 moves downward, thereby applying pressure to the inner pad 1. Since the inner pad 1 is arched, as the inner pad 1 is subjected to the downward pressure of the outer cover 2, the inner pad 1 is deformed, so that the edge of the inner pad 1 moves outward, and the limiting ring presses against the limiting step 6, that is, the sealing ring 3 presses against the inner wall of the sand bottle 5. When in use, the pressure inside the sand bottle 5 will also push the inner pad 1, and eventually the inner pad 1 will continue to expand, and the sealing ring 3 will continue to press against the inner wall of the sand bottle 5, thereby improving the sealing performance of the sand bottle 5.

[0017] The limiting step 6 is provided with a first guide surface, and the outer wall of the annular groove 4 is provided with a second guide surface that abuts against the first guide surface. A gap is provided between the outer cover 2 and the inner pad 1. When the inner pad 1 expands outward, the sealing ring 3 is pressed against the inner wall of the sand bottle 5 to improve the sealing performance of the sand bottle 5.

[0018] When the outer cover 2 of the utility model is closed, the limiting ring will press against the limiting step 6. As the outer cover 2 is tightened, the outer cover 2 moves downward, thereby exerting pressure on the inner pad 1. Since the inner pad 1 is arched, as the inner pad 1 is deformed by the downward pressure of the outer cover 2, the edge of the inner pad 1 moves outward, and the limiting ring will press against the limiting step 6, that is, the sealing ring 3 presses against the inner wall of the sand bottle 5. When in use, the pressure in the sand bottle 5 will also push the inner pad 1, and finally the inner pad 1 will continue to expand, and the sealing ring 3 will continue to press against the inner wall of the sand bottle 5, thereby improving the sealing performance of the sand bottle 5.

[0019] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A dental sandblasting machine sand bottle sealing device, characterized in that: It includes an outer cover and an inner pad, wherein the inner pad is fixed in the outer cover and a sealing ring is arranged between the inner pad and the outer cover, the cross section of the inner pad is arched, when the outer cover is closed on the sand bottle, the outer cover presses the inner pad, and the inner pad pushes the sealing ring to press against the inner wall of the sand bottle.

2. A dental sandblasting machine sand bottle sealing device according to claim 1, characterized in that: The outer cover is threadedly connected and fixed to the sand bottle. The outer cover is provided with an external thread, the inner pad is provided with an internal thread, the external thread is provided with at least four external thread inlets, and the position of the internal thread corresponding to the external thread inlet is provided with an internal thread inlet, and the external thread inlets correspond to the internal thread inlets one by one.

3. A dental sandblasting machine sand bottle sealing device according to claim 1, characterized in that: A gap for inserting a sand bottle is provided between the inner pad and the outer cover, an annular groove for accommodating a sealing ring is provided at the edge of the inner pad, a limiting step is provided on the inner wall of the sand bottle, and the inner pad is pressed against the limiting step.

4. A dental sandblasting machine sand bottle sealing device according to claim 3, characterized in that: The limiting step is provided with a first guide surface, and the outer wall of the annular groove is provided with a second guide surface which abuts against the first guide surface.

5. A dental sandblasting machine sand bottle sealing device according to claim 4, characterized in that: A gap is provided between the outer cover and the inner pad.

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