JPH0333333B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in dental treatment equipment.

Many dental medical institutions have traditionally used dental treatment devices that use handpieces that perform dental treatment by driving and rotating a grinding tool using an air turbine. Due to the need to use different handpieces, many dental treatment devices are equipped with multiple handpieces.

However, with conventional devices, the supply of drive air for driving the air turbine, chip air for blowing away grinding debris, and cooling water for cooling the teeth to be ground, which are supplied to each handpiece, must be stopped when the handpiece is locked when not in use. This was done using a solenoid valve that was linked via a relay circuit to a hanger switch that was activated when If cooling water is applied to the hanger switch, it may cause an electrical leak, and if another handpiece is removed from the hanger switch while one handpiece is in use, drive air, etc. will be supplied to the handpiece that was removed later, and the grinding tool will be damaged. Since the drive rotates and cooling water blows out, it is not possible to replace the grinding tool attached to another handpiece while one handpiece is in use, which has the disadvantage that dental treatment takes time.

Therefore, the inventor of the present invention has developed a system that can be miniaturized, has no fear of electrical leakage, and that drive air, etc. is supplied only to the handpiece that is removed from the hanger first, and that drive air is supplied to the handpiece that is subsequently removed from the hanger. They conducted research to develop a dental treatment device that was not currently available and completed the present invention.

That is, in a dental treatment apparatus using a plurality of handpieces, the present invention moves the pilot air flow path from a communicating state to an open state to the atmosphere when each handpiece is removed from a locked state, which will be described later. A flow path switching type hanger valve that reduces the pressure of pilot air supplied to the air valve, and a flow path that changes the flow paths of drive air, chip air, and cooling water supplied to each handpiece from a blocked state to a state where they can flow. an air valve that operates by reducing the pressure of pilot air supplied from a hanger valve to which the handpiece is locked; and a solenoid valve provided in a pilot air flow path between the air valve and the hanger valve corresponding to each handpiece; A pressure detection switch is activated when the pilot air pressure decreases in the air valve corresponding to each handpiece, and the solenoid valve provided in the pilot air flow path corresponding to other handpieces is closed by the activation of the pressure detection switch. The present invention provides a dental treatment device characterized by being provided with a relay circuit.

Hereinafter, the present invention will be further explained based on the embodiments of the dental treatment apparatus according to the present invention shown in the drawings.

FIG. 1 is a piping explanatory diagram of one embodiment of the dental treatment apparatus according to the present invention, and FIG. 2 is a wiring diagram of one embodiment of a relay circuit used in the dental treatment apparatus according to the present invention.

In the drawing, 1 is a grinding tool 1 attached to its tip.
A plurality of hands are supplied with drive air for driving the air turbine, chip air for blowing off grinding debris from the vicinity of the tip, and cooling water for cooling the tooth to be ground. Piece 2 is a flow path switching type that changes the flow path from a communicating state to an atmosphere open state when each hand piece 1 is removed from a locked state to reduce the pressure of pilot air supplied to an air valve to be described later. Hanger valve 3 corresponds to each handpiece 1, and each handpiece 1
This is an air valve that changes the flow paths of the drive air, chip air, and cooling water supplied to the drive air from the blocked state to the flowable state by reducing the pressure of the pilot air. Although only air is shown, inflow holes for drive air, chip air, and cooling water to be supplied to the handpiece 1 through the diaphragm 3a are provided in one block, respectively. The other block facing the outflow holes via the diaphragm 3a is provided with a diaphragm chamber 3b to which pilot air is supplied via a hanger valve 2 to which the hand piece 1 is locked. If the pressure of the pilot air supplied to the diaphragm chamber 3b decreases while air and water are being supplied via a foot valve (not shown), etc., which separately supplies and stops air and water as necessary, As shown in the lowermost air valve 3 in FIG. 1, the diaphragm 3a is bent toward the diaphragm chamber 3b, and necessary components of drive air, chip air, and cooling water are supplied to the hand piece 1. Reference numeral 4 indicates a solenoid valve provided in a pilot air flow path between each air valve 3 and each hanger valve 2; 5 indicates a solenoid valve provided for pilot air between each solenoid valve 4 and each air valve 3; A pressure detection switch 6 is activated by a drop in pressure, and 6 is a relay circuit in which a switch provided in a relay 6a is closed by the activation of the pressure detection switch 5, thereby closing a solenoid valve 4 provided in another pilot air flow path. By changing the wiring on the switch side of the relay 6a, the pressure detection switch 5 can be used not as a switch that closes when the pilot air pressure decreases, but as a switch that opens when the pressure decreases, as shown in Figure 2. .

Hereinafter, the operation of the dental treatment apparatus according to the present invention provided with the above-mentioned apparatus will be explained.

In the dental treatment device according to the present invention, the first
As shown in the figure, when one hand piece 1 is removed from the hanger valve 2, the flow path in the hanger valve 2 changes from the communicating state to the atmosphere open state, and as a result, the pilot air that was being supplied to the air valve 3 is released to the atmosphere. As a result, the pressure in the pilot air flow path decreases, and the pressure detection switch 5 provided in the pilot air flow path is activated, and the handpiece is connected to the other handpiece 1 via the relay circuit 6 shown in FIG. When the solenoid valve 4 provided in the pilot air flow path is closed, the hanger valve 2
The diaphragm 3a of the air valve 3, which is supplied with pilot air released to the atmosphere, is bent toward the diaphragm chamber 3b as the pressure of the pilot air decreases, and if air and water are supplied to each inflow hole, As shown in the lowermost air valve 3 in FIG. 1, the diaphragm 3a is bent to allow each air and water to flow, causing the grinding tool 1a attached to the handpiece 1 to rotate and tip air and cooling water to blow out. Even if the other hand piece 1 is removed from the hanger valve 2 in this state, the pilot air in the diaphragm chamber 3 of the air valve 3 will not be released from the hanger valve 2 because its flow is blocked by the solenoid valve 4. Even if the air pressure does not drop and regulated air or water is supplied to the inflow hole, the diaphragm 3a does not bend toward the diaphragm chamber 3b, so the air and water cannot flow and the grinding tool 1a There is no rotation or chip air or cooling water blowing out.

Since the dental treatment device according to the present invention has the structure and operation described above, while the dentist is using one handpiece, the assistant can use the grinding tool attached to the other handpiece. Even when using two handpieces alternately, if you first lock the handpiece that was removed from the hanger valve to the hanger valve, the supply of each air, water, etc. will be automatically performed. The time required for dental treatment can be significantly shortened because the handpiece can be switched to the other handpiece at any time.Furthermore, by changing the handpiece locking device from a hanger switch to a hanger valve, there is no electrical leakage, and by using an air valve, relays and solenoid valves can be used. It was possible to significantly reduce the use of
This device has great industrial and practical value due to its miniaturization and economical efficiency.

[Brief explanation of the drawing]

FIG. 1 is a piping explanatory diagram of one embodiment of the dental treatment apparatus according to the present invention, and FIG. 2 is a wiring diagram of one embodiment of a relay circuit used in the dental treatment apparatus according to the present invention. 1...Handpiece, 1a...Grinding tool, 1b...
...Air turbine, 2...Hanger valve, 3...Air valve, 3a...Diaphragm, 3b...Diaphragm chamber, 4...Solenoid valve, 5...Pressure detection switch, 6...Relay circuit, 6a...Relay.

Claims (1)

[Claims] 1. In a dental treatment device that uses multiple handpieces, when each handpiece is removed from the locked state, the pilot air flow path is shifted from the communicating state to the atmosphere open state and is supplied to the air valve described later. The flow path switching type hanger valve reduces the pressure of the pilot air, and the drive air, chip air, and
An air valve that changes the flow of cooling water from a blocked state to a state where it can flow by reducing the pressure of pilot air supplied from a hanger valve that is locked to each handpiece, and an air valve and a hanger valve that correspond to each handpiece. A solenoid valve is provided in the pilot air flow path between the handpiece, a pressure detection switch that is activated by a drop in the pilot air pressure in the air valve corresponding to each handpiece, and a pressure detection switch that is activated by the pressure detection switch that A dental treatment device comprising a relay circuit for closing a solenoid valve provided in a pilot air flow path corresponding to a piece.