JPS6157022B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present application relates to a dental anesthesia device, and more particularly to a cooled dental anesthesia device using the Hirsch tube principle.

The embodiments of the present application will be described in detail below with reference to the drawings.
Reference numeral A denotes a hand-held member, which is composed of a shaft tube 1, into which a cooling member 2 based on the Hirsch tube principle is fitted in the middle part. This cooling member 2 is made of a short cylindrical body, and has a spiral space 3 formed in a spiral cross section in the longitudinal center thereof as shown in FIG. An air supply hole 7 that extends in the diametrical direction from the center and communicates with a communication hole 6 that communicates with an air supply path 14 to be described later to eject pressurized air into the vortex space 3 communicates with the entire rear surface of the vortex space 3. A hot air hole 8 opens at the front surface of the vortex-shaped space 3 and extends to the rear. It is composed of a disk-shaped aperture plate 11 provided with a pore 10 that communicates with the center of the shaped space 3. 12
is a cooling pipe whose tip end protrudes from the narrow diameter end of the hand-held member A and whose rear end is screwed into the cold air hole 9, and through this cooling pipe 12 the cold air generated in the cooling member 2 is transferred to the hand-held member A. It is ejected from the tip. Reference numeral 13 includes an air supply passage 14 communicating with the communication hole 6 and a communication hole 15' communicating with the hot air hole 8.
A passage member having a rectangular outer shape as shown in FIG. The cooling member 2 is fitted into the shaft cylinder 1 in a state in which it is pressed into contact with the rear surface of the cooling member 2 via a holding piece 17 by an attached ring 16 . Reference numeral 18 denotes a thermoseal that is attached to the outer periphery of the tip of the hand-held member A and whose color changes depending on the temperature. B is a joint member rotatably and detachably connected to the rear part of the hand-held member A via a connecting mechanism 19, which internally communicates the air supply passage 20 communicating with the air supply passage 14, the exhaust passage 15, and the outside air. A flexible hose connected to a pressurized air source is attached to the rear end of the air supply passage 14.

Therefore, pressurized air is transferred from the pressurized air source to the air supply passage 2.
0. When the air flows into the vortex space 3 through the air supply path 14, the communication hole 6, and the air supply hole 7, cold air is generated at the center of the vortex space 3 and hot air is generated at the outer periphery due to the Hirsch tube principle. , the cold air in the center flows into the cooling pipe 12 through the pores 10 of the diaphragm plate 11 and passes through the hand-held member A.
It squirts out from the tip and applies it to the area to be anesthetized. On the other hand, the hot air at the outer periphery of the spiral space 3 is released through the hot air holes 8.
From the exhaust passage 15 to the inner circumference of the shaft cylinder 1 and the exhaust passage 21
is discharged to the outside air through the

As described above, the present dental anesthesia device uses pressurized air, which is used as a driving source for a dental air turbine handpiece or an air micromotor, as a cooling medium, so it can be handled in exactly the same way as conventional dental treatment instruments. Therefore, it is extremely convenient to use, has a simple structure, and has a thermoseal on the outer periphery of the tip of the handheld member, making it convenient to check the anesthesia temperature. It has the advantage that there is no risk of damaging the body.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a partially cutaway side view, FIG. 2 is an enlarged sectional view of the main part, and FIG.
Figures A, B and C are respectively cross-sectional views taken along the - line in Figure 1;
They are a - line sectional view and a - line sectional view. In the figure, 3 is a spiral space, 7 is an air supply hole, 8 is a hot air hole, 11 is a throttle plate, 12 is a cooling pipe, 15 is an exhaust path, 18 is a thermoseal, and A is a handheld member.

Claims (1)

[Scope of Claims] 1. A vortex-shaped space portion in which pressurized air supplied from an air supply hole is guided in a vortex shape in a cylindrical hand-held member, a hot air hole communicating with the entire rear surface of this vortex-shaped space portion, A cooling member having a cold air hole that communicates with the center of the spiral space through a diaphragm plate having an opposing fine hole is fitted on the front surface of the spiral space, and communicates with the hot air hole to direct hot air to the outside air. A dental anesthetic tool comprising: an exhaust path for discharging the air; and a cooling pipe communicating with the cold air hole and spouting cold air from the tip of the hand-held member. 2. A vortex-shaped space that spirally guides pressurized air supplied from an air supply hole in a cylindrical hand-held member, a hot air hole that interlocks with the entire rear surface of this vortex-shaped space, and a front surface of the vortex-shaped space. an exhaust passage fitted with a cooling member having a cold air hole that communicates with the central part of the cooling member through a diaphragm plate having a pore facing the cooling member, and that communicates with the hot air hole to discharge hot air to the outside air; Each of the cold pipes communicates with the cold air holes and blows out cold air from the tip of the hand-held member A, and a thermoseal whose color changes depending on the temperature is attached to the outer periphery of the tip of the hand-held member A. Dental anesthesia tools.