JPH0333332B2 - - 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 equipment that uses a handpiece that performs 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 impossible 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, etc. is supplied only to the handpiece that is removed from the hanger after that. The present invention was completed through research to develop a dental treatment device that was not available.

That is, in a dental treatment apparatus using a plurality of handpieces, the present invention limits the flow rate of pilot air supplied to a hanger valve (to be described later) in which each handpiece is locked, for each flow path corresponding to each handpiece. When the throttle valve and each handpiece are removed from the locked state, the pilot air flow path changes from the closed state to the flowing state, and the pilot air supplied through the respective throttle valves is released to the atmosphere and the pilot is operated. The drive air/chip air is installed in the pilot air flow path between the air release type hanger valve that reduces the air pressure, and the throttle valve and hanger valve that correspond to each handpiece, and is supplied to each handpiece.・Air valves that shift the cooling water flow paths from the blocked state to the flowable state by reducing the pressure of the pilot air mentioned above, and the pilot air flow paths between the air valves and hanger valves corresponding to each handpiece. Operation of the pressure detection switch and pressure detection switch that are installed in the pilot air flow path between the provided solenoid valve and the air valve and solenoid valve corresponding to each handpiece and are activated by a drop in pilot air pressure. The present invention provides a dental treatment device characterized in that it is provided with a relay circuit for closing a solenoid valve provided in a pilot air flow path corresponding to another handpiece.

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 air turbines 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 teeth to be ground. It's a hand piece. Reference numeral 2 indicates a throttle valve that limits the flow rate of pilot air supplied to a hanger valve (to be described later) where each hand piece 1 is locked, for each flow path corresponding to each hand piece 1, and 3 indicates a throttle valve when the hand piece 1 is locked. When the pilot air is removed from the air condition, the pilot air flow path is changed from the blocked state to the flowing state, and the pilot air is released to the atmosphere to reduce the pressure of the pilot air. The drive air, chip air, and cooling water flow paths that are installed in the pilot air flow path between the handpieces 1 and 1 and are supplied to each handpiece 1 are changed from a blocked state to a flowable state by a decrease in the pilot air pressure. Although the structure of this air valve 4 is shown only for drive air in FIG. 1, it is used to separate the drive air, chip air, and cooling water that are supplied to one block via the diaphragm 4a to the handpiece 1. The handpiece 1 is secured to the other block, which is provided with inflow holes and outflow holes for air and water, respectively, and is opposed to the air and water inflow holes and outflow holes through a diaphragm 4a. A diaphragm chamber 4b is provided to which the pilot air supplied to the hanger valve 3 is supplied via the throttle valve 2, and a foot valve (not shown) is provided to supply and stop the separate supply of air and water to each inlet hole as necessary. When the pressure of the pilot air being supplied to the diaphragm chamber 4b decreases while air or water is being supplied to the diaphragm chamber 4b through the By bending to the side, the necessary components of drive air, chip air, and cooling water are supplied to the hand piece 1. Note that the throttle valve 2 may be provided integrally with the air valve 4 or may be provided as a completely separate member. 5 is a solenoid valve provided in a pilot air flow path between each air valve 4 and each hanger valve 3; 6 is a solenoid valve provided in a pilot air flow path between each solenoid valve 5 and each air valve 4. A pressure detection switch 7, which is activated by a drop in pilot air pressure, is provided in a pilot air flow path corresponding to another handpiece 1 when a switch provided in a relay 7a is closed by the activation of the pressure detection switch 6. This is a relay circuit that closes the solenoid valve 5 that is connected to the relay 7.
By changing the wiring on the switch side of a, the pressure detection switch 6 can be used not as one that closes when the pilot air pressure decreases, but also one that opens when the pressure decreases, as shown in FIG.

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, when one hand piece 1 is removed from the hanger valve 3 as shown in FIG. The pilot air is released into the atmosphere. Then, the pressure in the pilot air flow path in the hanger valve 3 decreases significantly because the flow rate of the pilot air supplied by the throttle valve 2 is restricted, and the pressure detection switch installed in the pilot air flow path decreases. 6 is activated, the solenoid valve 5 provided in the pilot air flow path corresponding to the other hand piece 1 is closed via the relay circuit 7 shown in FIG. The diaphragm 4a of the air valve 4, through which air is flowing, is bent toward the diaphragm chamber 4b as the pressure of the pilot air decreases, and if air and water are supplied to each inlet hole, the diaphragm 4a is at the lowest position in FIG. The diaphragm 4a, like the air valve 4 shown in FIG. Even if the other hand piece 1 is removed from the hanger valve 3 in this state, the pilot air in the diaphragm chamber 4b of the air valve 4 will not be released from the hanger valve 3 because its flow is blocked by the solenoid valve 5. Even if the air pressure does not drop and regulated air or water is supplied to the inflow hole, the diaphragm 4a does not bend toward the diaphragm chamber 4b, so air and water cannot flow, and the grinding tool 1a The chip does not rotate and the chip air and cooling water do not blow 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, each air, water, etc. supply will be automatically supplied. Being able to switch to the other handpiece greatly reduces the time required for dental treatment, and changing the handpiece lock from a hanger switch to a hanger valve eliminates electrical leakage.
By using an air valve, the use of relays, solenoid valves, etc. can be significantly reduced, and the device is compact and economical, which is of great industrial and practical value.

[Brief explanation of 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. 1...Handpiece, 1a...Grinding tool, 1b...
... Air turbine, 2 ... Throttle valve, 3 ... Hanger valve, 4 ... Air valve, 4a ... Diaphragm, 4b ... Diaphragm chamber, 5 ... Solenoid valve, 6
...Pressure detection switch, 7...Relay circuit, 7a
……relay.

Claims (1)

[Claims] 1. In a dental treatment device that uses multiple handpieces, a throttle valve that limits the flow rate of pilot air supplied to a hanger valve (to be described later) where each handpiece is locked, for each flow path corresponding to each handpiece. When each handpiece is removed from the locked state, the pilot air flow path changes from the blocked state to the flowing state, and the pilot air supplied through the respective throttle valves is released to the atmosphere to reduce the pilot air pressure. It is installed in the pilot air flow path between the atmospheric release valve type hanger valve that lowers the air pressure, and the throttle valve and hanger valve that correspond to each handpiece. An air valve is provided in the pilot air flow path between the air valve and the hanger valve corresponding to each handpiece, which causes each flow path to transition from a blocked state to a flowable state by reducing the pressure of the pilot air described above. A pressure detection switch is installed in the pilot air flow path between the solenoid valve and the air valve corresponding to each handpiece and the solenoid valve, and is activated when the pilot air pressure decreases. A dental treatment device comprising a relay circuit for closing a solenoid valve provided in a pilot air flow path corresponding to a handpiece.