JPS6034251Y2 - Polishing device for dental technology - Google Patents

Description

[Detailed description of the invention] This invention relates to a polishing device for dental technology that polishes, for example, the inner surface of a cast metal tooth crown. A pressurized air outlet pipe connected to an air source and an abrasive outlet pipe connected to a container containing powdered abrasive material are installed, and the abrasive material is released using the negative pressure generated by the supply of pressurized air. Polishing devices for dental techniques are known that polish the inner surface of, for example, a cast metal tooth crown by suctioning and jetting an abrasive material together with pressurized air from a jet nozzle.

However, since the abrasive used for this is in powder form, the abrasive tends to harden due to moisture in the storage container, and combined with the small diameter of the abrasive outlet tube, the abrasive There has been a drawback in that the smooth outflow is impaired or the outflow is interrupted, and the polishing operation cannot be carried out effectively and efficiently.

This invention improves the above-mentioned conventional defects and improves the efficiency of polishing work.The embodiment is detailed below with reference to the drawings. , the regulator 3 and the pressure gauge 4 are sequentially connected to a normally closed first valve body 5 operated by foot operation, and pressurized air is provided at the outlet end of the valve body 5 in a pencil-shaped hand tool 6 to be described later. A lead-out pipe 7 is connected.

Reference numeral 8 denotes a storage container which is sealed with a lid 9 through a backing 10, the lower part of which is inclined in a conical shape, and a powdered abrasive material 11 is stored inside this container.

Further, the storage container 8 has a large number of pores 12 at its lower end, and the lower end thereof is buried in the abrasive material 11.
A spout pipe 14 extends vertically to near the bottom outlet 13 of the
is attached, and the upper end opening of this jet pipe 14 is branched and connected to the outlet end of the valve body 5 via an adjustment valve 15.

Further, a safety valve 17 and a second valve body 16 which is operated by foot operation to blow out the air inside the container to the outside air are connected to the storage container 8.

18 is a pressure gauge inside the storage container 8, and 19 is a desiccant box attached to the inner surface of the lid 9.

FIG. 3 shows an enlarged sectional view of the tip of the pencil-type hand tool 6, which has a support piece 21 fitted into the tip of a long cylindrical body 20. A central hole 22 having a large diameter in the front half is provided through the piece 21, and a jet nozzle 24 having a jet hole 23 is screwed to the tip of the central hole.

Further, in this cylindrical body 20, the pressurized air outlet pipe 7 and an abrasive material outlet pipe 25 connected to the bottom outlet 13 of the storage container 8 are disposed, and the pressurized air outlet pipe 7 The abrasive outlet tube 24 has its tip end penetrating through the center hole 22 and slightly connected to the rear end of the jetting hole 23 so that its tip opening communicates with the large diameter portion 22' of the center hole 22. They are each supported by the support piece 21 so as to communicate with each other with a gap left.

However, in use, when the first valve body 5 and the second valve body 16 are operated simultaneously by foot operation, the first valve body 5 opens.
When the second valve body 16 closes, the pressurized air from the pressurized air source 1 is guided to the pressurized air outlet pipe 7 and the jet pipe 14 via the refrigerated air dryer 2 and the regulator 3, and
Pressurized air is blown out from the pores provided in 4.

Therefore, the powdered abrasive material 11 stored in the storage container 8 is agitated by the jet of pressurized air, or if it is solidified, it is crushed, and the inside of the container 8 is pressurized and the abrasive material is 11 will assist in flowing down.

On the other hand, inside the handheld tool 6, the pressurized air flowing out from the tip of the pressurized air outlet pipe 7 causes the center hole 22 of the support piece 21 to
Negative pressure is generated within the large diameter portion 22' of the abrasive, which sucks the abrasive in the abrasive outlet tube 25, and the abrasive is ejected from the tip of the ejection nozzle 24 together with pressurized air.

In this manner, the polishing action is performed by spraying the abrasive material jetted from the jet nozzle 24 onto the material to be polished.

Then, when the foot pedal operation is stopped, the first valve body 5 returns to the closed position, and the second valve body 16 returns to the open position, and the pressurized air in the storage container 8 is released into the atmosphere.

In the above, it is of course possible to use the first valve body 5 and the second valve body 16 as electromagnetic valves, and to operate these electrically by a manual switch or a foot switch.

Therefore, according to the present application, the pressurized air for blowing out the abrasive material is used to guide it into the abrasive material storage container, thereby stirring and pulverizing the abrasive material in the storage container.
This has the advantage that the flow of the abrasive ejected from the ejection nozzle becomes smooth and the polishing work can be carried out efficiently.

[Brief explanation of the drawing]

The drawings show an example of the present invention; Fig. 1 is an overall view partially cut away, Fig. 2 is an enlarged view showing a part of the inside of the storage container, and Fig. 3 is an enlarged cross-sectional view of the tip of the handhold. be. In the figure, 1 is a pressurized air source, 5 is a first valve body, 6 is a handheld tool, 7 is a pressurized air outlet pipe, 8 is a storage container for powdered abrasive material, 11
12 is an abrasive, 12 is a pore of an ejection pipe, 13 is a bottom outlet, 14 is an ejection pipe, 16 is a second valve body, 24 is an ejection nozzle, and 25 is an abrasive outlet pipe.

Claims (3)

[Scope of utility model registration request] (1) A sealed storage container that stores an abrasive material, a pressurized air outlet pipe and an abrasive outlet pipe are arranged inside, and an ejection nozzle is provided at the tip, and the abrasive material is ejected together with pressurized air from this ejection nozzle. A hand-held tool configured as shown in FIG. A pressurized air source is connected to the pipe and the ejection pipe via a normally closed first valve body that is opened during operation, and the abrasive outlet pipe is connected to an abrasive outlet provided in the storage container. A polishing device for a dental technique, further comprising a second valve body connected to the storage container, the interior of which is always communicated with the atmosphere and closed during operation. (2) A polishing device for dental technology according to claim 1, which is a registered utility model and comprises a first valve body and a second valve body that are interlocked. (3) The polishing device for dental technology according to claim 1 or 2, wherein the first valve body and the second valve body are constituted by electromagnetic valves.