JPH0214844B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present application relates to a mixed air generator in a tooth surface cleaning device that uses pressurized air to spray an abrasive onto teeth to clean and remove dental plaque and the like.

Conventionally, an abrasive such as baking soda (NaHCO ₂ ) is stored in a container having a funnel-shaped discharge part at the bottom, and a swirl chamber is formed by inputting pressurized air to the lower end of the discharge part. The abrasive and pressurized air are configured to mix the abrasive in the container with the pressurized air in a vortex chamber by exposing the abrasive to the pressurized air and energize electrical and mechanical vibrations, and to lead this mixed air to the outside. A mixing air generator is used to supply pressurized air from a pressurized air source, mixed air from the mixing air generator, and water from a water source to a pencil-shaped handheld device equipped with a blow-out nozzle, respectively. A tooth surface cleaning device that cleans and removes plaque and the like adhering to the tooth surface by ejecting these three components simultaneously from a jet nozzle and spraying them onto the tooth surface is known, for example, in JP-A-58-180144. It is.

However, the mixed air generator for the abrasive and pressurized air in the tooth surface cleaning device has an extremely complicated structure and high cost, and also generates unpleasant noises due to vibration, and the small diameter discharge port is difficult to clean. This has disadvantages such as clogging and insufficient stability of operation.

Therefore, the present application provides a mixed air generator that can improve the above-mentioned conventional defects and perform cleaning work efficiently.Examples of the device will be explained below with reference to the drawings. The whole mixed air generator A is shown cut out, and 1 is a casing consisting of a lid 2 and a main frame 3. The abrasive storage body 4 is attached. This abrasive storage body 4 has a columnar upper body 6 and a lower body 7 screwed together at the upper and lower positions of a cylindrical main body 5 to form _a hermetically sealed structure.
A powdered abrasive 8 such as the following is stored. A space 9 having a conical upper surface is provided at the center of the lower surface of the upper body 6, and a conical fumarole chamber 10 is provided at the upper surface of the lower body 7. An opening 11 is formed in the opening 11, and an air supply pipe 13 is connected to the opening 11 through a through hole 12a extending laterally.
4 extends, and a through hole 12b extending laterally thereto.
The discharge pipes 15 are connected to each other via. 16
is erected in the guide hole 14, and its upper end is the space part 9.
A conduit 17 facing inside is a piece piece fitted into the conduit 14 so as to be movable up and down, and a lower part thereof is connected to the fumarole chamber 10.
It is formed into a conical shape so as to coincide with the conduit 16, and the upward movement of the bridge piece 17 is regulated by a stopper piece 18 provided on the outer surface of the conduit 16. Reference numeral 19 denotes an input member installed inside the front end of the housing 1, and a supply hose 20 for supplying pressurized air and water via a connection mechanism known from, for example, Japanese Utility Model Publication No. 58-797, etc., is provided on the outer surface.
Connector 21 that is detachably and rotatably connected to
However, the inner surface is provided with a first terminal 22 for supplying chip air, a second terminal 23 for supplying mixed air, and a third terminal 24 for supplying water. The air pipe 13 is connected. Reference numeral 25 denotes an output member installed in the housing 1 in parallel with the input member 19, and an output hose 42, which will be described later, is connected to the outer surface of the housing 1 via the above-mentioned known connection mechanism, for example.
A connector 26 which is detachably and rotatably connected to the
A first terminal 22 for supplying the chip air is provided on the inner surface.
a first terminal 27 for leading out the chip air connected to the
A second terminal 28 for leading out mixed air and a third terminal 28 for leading out water.
The discharge pipe 16 is connected to the second terminal 28 for discharging mixed air, and the third terminal 24 for water supply is connected to the third terminal 29 for discharging water. FIG. 4 is a cross-sectional view showing the tip of a pencil-shaped hand tool B, which has a curved tip through a connecting tube 31 inside the tip of a long cylindrical grasping section 30. The rear end of the jet pipe 32 is fitted, and the jet pipe 32 has a jet hole 33 for mixed air at the tip, a jet hole 34 for chip air around it, and a jet hole 35 for water around it.
Each of the jet nozzles 36 is fitted therein, and inside the jet pipe 32 is connected a conduit 38 having a mixed air supply hose 37 connected to the rear end thereof, and a water supply hose 39 connected to the rear end thereof. A conduit 40 is provided, and the blowout pipe 32 is supplied with pressurized air for chip air. 41 is the mixed air supply hose 3
7 and the water supply hose 39, the flexible hose is led out to the rear of the grasping part 30, and has a connector (not shown) connected to the outlet hose 42 of the output member 25 of the housing 1 at its end. ) is provided.
FIG. 5 shows a schematic diagram of a configuration in which the above-mentioned mixed air generator A and handheld tool B are connected to supply sources 43, 44, and 45.

Next, to explain the operation of the mixed air generator A of the present invention, in the inoperative state shown in FIG. As shown in Figure 1C, the piece 17 is pressed by pressurized air and floats up.
The pressurized air is blown into the container 4 from the conical gap between the blow hole 10 and the piece 17, and the powdered abrasive 8 stored in the container 4 is blown up while being stirred by the pressurized air. The abrasive 8 is mixed with pressurized air, and the mixed air is ejected from the ejection hole 33 via the conduit 16, the guide hole 14, the through hole 12a, and the discharge pipe 15. Further, the chip air supplied from the chip air supply source 43 is directly led to the jet pipe 32 via the first terminal 22 for chip air supply of the input member 19 and the first terminal 27 for leading out chip air of the output member 25, and is led from the jet hole 34. Also, the water supplied from the water supply source 45 is directly led to the conduit 40 via the third water supply terminal 24 of the input member 19 and the third water outlet terminal 29 of the output member 25, and is directly led to the water supply hole 3.
It erupts from 5.

FIG. 6 shows the use of a piece piece 17' which is formed into a conical shape so that the lower part coincides with the fumarole chamber 10, and whose upper part is also bulged out in a conical shape to form the whole like a Soroban ball. According to this configuration, the abrasive easily falls from the conical upper surface of the bridge piece 17' along the inclined surface, and the lower surface of the bridge piece 17' and the fumarole chamber. Mixing and agitation of the powdered abrasive 8 and the pressurized air ejected from the conical gap with the abrasive 10 is promoted.

Note that the above shows the case where the bridge pieces 17 to 17' are supported by the conduit 16 so as to be movable up and down, and with this configuration, the jet flow of pressurized air jetted out through the conical gap P and The mixing of the abrasive and the pressurized air is promoted by the floating action of the piece piece by pressurized air, but when the piece piece is placed between its conical lower part and the conical fumarole chamber 10, Even if it is fixed to the conduit 16 so that a small gap P is created, the object of the present application can be sufficiently achieved.

As described above, according to the present application, the powdered abrasive in the abrasive container is blown out of pressurized air from the small gap formed by the blow chamber formed on the inner surface of the lower part of the container and the bridge piece. The abrasive and the pressurized air are efficiently mixed by the jet flow, and mixed air can be easily and reliably generated, and there is no risk of clogging. Since the piece is floated by the pressurized air, the agitation of the abrasive is promoted by the floating action, and since it does not have a special vibrating part unlike conventional machines, there is no risk of generating unpleasant noises. It also has the advantage of being simple in structure and inexpensive to manufacture.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a longitudinal sectional view, FIG. 2 is a partially cutaway plan view of FIG. 1, and FIG. 3 shows a state in which the moving piece is raised in FIG. 1. 4 is an enlarged sectional view of the tip of the handheld tool, FIG. 5 is a schematic diagram of the connection between the mixed air generator, the handheld tool, and the supply source, and FIG. 61 shows another embodiment of the moving piece. FIG. 2 is a longitudinal sectional view of the abrasive storage body showing a state in which the movable piece is floating in FIG. 1. FIG. In the figure, 4 is an abrasive storage body, 5 is a main body, 8 is an abrasive, 10 is a fume chamber, 11 is an opening, 17, 17'
is the bridge piece, A is the mixing air generator, and P is the gap.

Claims (1)

[Scope of Claims] 1. A fume chamber and an opening through which pressurized air is supplied are provided on the inner surface of the lower part of the abrasive storage body formed in a sealed state, and the upper part of the fume chamber is provided. , a supply section for supplying pressurized air to the opening, and a supply section for supplying pressurized air to the opening, and a supply section for supplying pressurized air to the opening; A mixed air generator in a surface cleaning device, comprising: a discharge section for guiding the mixed air to the outside; 2 A fumarole chamber and an opening through which pressurized air is supplied are provided on the inner surface of the lower part of the abrasive storage body formed in a sealed state, and the lower part of the abrasive chamber matches the fumarole chamber. a supply part that supplies pressurized air to the opening, and a discharge part that guides the abrasive and pressurized air generated in the storage to the outside. Mixed air generator in surface cleaning equipment.