JPH0333335B2 - - 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, the conventional device has a structure as shown in FIG. 1, for example, and includes drive air for driving the air turbine supplied to the air turbine 1b of each handpiece 1, chip air for blowing off grinding debris, and cooling for cooling the teeth to be ground. To transition from the water supply stop state to the supply state, the hand piece 1 is connected to the hanger valve 2.
When the hanger valve 2 is changed from the locked state to the released state, the hanger valve 2 is opened and the pressure of the pilot air supplied via the throttle valve 3 is reduced, thereby changing the flow path from the blocked state to the flowable state. Because this was done by
When the hand piece 1 is removed from the hanger valve 2, drive air, etc. is also supplied to the hand piece 1 that is later removed from the hanger valve 2, and the grinding tool 1a is driven and rotated, and cooling water is blown out. Therefore, only one hand piece 1 is used. When replacing the grinding tool 1a attached to another handpiece 1,
The hanger valve 2 from which the hand piece 1 is removed later has to be brought into the same state as when the hand piece 1 is locked, which has the disadvantage that the work becomes complicated and dental treatment takes time.

The inventor of the present invention has conducted extensive research to solve these drawbacks, and has found that by combining a conventional device with an air-controlled on-off valve, drive air, etc. is supplied only to the handpiece that is removed from the hanger valve first. The present invention was completed by discovering that it is possible to provide a dental treatment apparatus in which drive air and the like are not supplied to the handpiece that is later removed from the hanger valve.

That is, in a dental treatment apparatus using a plurality of handpieces, the present invention limits the flow rate of pilot air supplied to each 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. It is installed in the pilot air flow path between the atmospheric release type hanger valve that reduces the pressure of the pilot air, and the throttle valve and hanger valve that correspond to each handpiece. An air valve that transitions the chip air/cooling water flow paths from a blocked state to a flowable state by reducing the pressure of the pilot air, and a pilot air flow path between the air valve and hanger valve corresponding to each handpiece. Each of the air control valves is provided with an air control opening/closing valve that changes each pilot air flow path corresponding to the remaining handpieces from a flowing state to a closed state when the pressure of pilot air in the air valve corresponding to a certain handpiece decreases. The present invention provides a dental treatment device characterized by:

EMBODIMENT OF THE INVENTION Hereinafter, the present invention will be described in detail based on the embodiments of the dental treatment apparatus according to the present invention shown in the drawings.

Figures 2A, B, C, D, and E show one of the dental treatment devices according to the present invention that can use two handpieces.
FIG. 3 is an explanatory diagram of piping and operation of an embodiment of the dental treatment device according to the present invention in which four handpieces can be used, and FIG.
FIG. 3 is a plan view of one embodiment of the air valve used in the device of the present invention in the state shown in FIG. Furthermore, the third
Since the drawings up to the figure are complicated, the flow path to the air valve and handpiece is represented by the flow path for drive air, and the symbol indicating the air control on-off valve is used for air, etc. in Figures 2A and 3. FIGS. 2B to 2E show the normal state in which the motor is supplied, and each operating state is shown in FIGS. In the drawing, reference numeral 1 houses an air turbine 1b that drives and rotates a grinding tool 1a attached to its tip, and includes drive air for driving the air turbine 1b, chip air that blows out grinding debris from the vicinity of the tip, and the object to be ground. a handpiece supplied with cooling water for cooling the teeth;
2, when each hand piece 1 is removed from the locked state, the pilot air flow path is changed from the closed state to the flowing state, and the pilot air supplied through the throttle valves, which will be described later, is released to the atmosphere and the pilot air is released. A hanger valve 3 is an atmosphere release valve type that reduces the air pressure. Reference numeral 3 is a throttle valve that is provided corresponding to each hanger valve 2 and restricts the flow rate of pilot air supplied to each hanger valve 2. The degree to which the flow rate of pilot air is restricted by the valve 3 is that when the flow path in the hanger valve 2 is in a circulating state and the pilot air is released to the atmosphere, the amount of pilot air that is supplied is much larger than the amount of pilot air that is released to the atmosphere. It is necessary to limit the amount so that the pressure of the pilot air decreases as little as possible, and in practice, it is necessary to select it appropriately depending on the pressure of the pilot air to be supplied and the condition of the flow path beyond the throttle valve 3. Reference numeral 4 has a structure as shown in FIG. 4, and one block is provided with inflow and outflow holes for drive air, chip air, and cooling water to be supplied to the handpiece 1 through a diaphragm 4a. The other block facing the inflow and outflow holes via the diaphragm 4a has its flow rate restricted by a throttle valve 3, and the flow path in the hanger valve 2 is changed to a flow state and opened to the atmosphere. This air valve is equipped with a diaphragm chamber 4b to which pilot air whose pressure decreases is supplied, and air is supplied to each inlet hole through a foot valve (not shown) that supplies and stops separate air and water as necessary. diaphragm chamber 4b while water is being supplied.
When the pressure of the pilot air being supplied to the air valve decreases, the diaphragm 4a bends toward the diaphragm chamber 4b as shown in the air valve 4 at the top of FIG. The air is then transferred to handpiece 1.
Necessities in water are supplied. Numerals 5 are provided in the pilot air flow path between the air valve 4 corresponding to each hand piece 1 and the hanger valve 2, the number of which corresponds to the other hand pieces 1, respectively. This is an air-controlled on-off valve that shifts each pilot air flow path corresponding to the remaining hand piece 1 from a flowing state to a closed state when the pressure of the pilot air decreases.

The operation of the dental treatment apparatus according to the present invention having the above configuration will be explained based on FIGS. 2A to 2E.

In the dental treatment apparatus according to the present invention, when the hand piece 1 is locked to all the hanger valves 2, the flow path in the hanger valve 2 is closed as shown in FIG. 2A, so the air valve 4 is closed. The pressure of the pilot air in the diaphragm chamber 4b is high and equal to the pressure of the pilot air supplied to the throttle valve 3, and the diaphragm 4a is pressed toward the inflow hole/outflow hole, so that drive air, etc. is supplied to the inflow hole. The handpiece 1 is not activated even when the handpiece is in use. From this state, as shown in Figure 2B, when the upper handpiece 1 is removed from the hanger valve 2,
The flow path in the upper hanger valve 2 is shifted to the flow state as shown by the broken line, and the pilot air is released to the atmosphere as shown by the arrow, so the pressure of the pilot air decreases and the pressure in the diaphragm chamber 4b of the upper air valve 4 decreases. 4a, the diaphragm 4a for each air and water becomes diaphragm chamber 4b as shown in FIG.
Since it is bent to the side, drive air, etc. can be supplied to the hand piece 1, and only the upper hand piece 1 can be operated, and the flow path in the lower air control on-off valve 5 is closed. Next, when the lower hand piece 1 is removed from the hanger valve 2 as shown in FIG. transferred from the state to the state of circulation. However, since the flow path of the lower air control on-off valve 5 is already blocked in the state shown in FIG. 2B, pilot air is discharged only in the area indicated by the arrow in FIG. 2C, and the diaphragm chamber of the lower air valve 4 High-pressure pilot air still exists in 4b, and the diaphragm 4a is pressed toward the inflow and outflow holes, so drive air, etc. is not supplied to the lower handpiece 1, and the lower handpiece 1 is activated. It's impossible. On the other hand, the upper hand piece 1 is operable because the corresponding air valve 4 maintains a state in which drive air and the like can be supplied as in the state shown in FIG. 2B. Next, from this state, when the upper hand piece 1 that was previously removed from the hanger valve 2 is locked again to the upper hanger valve 2, the upper hanger valve 2
Since the flow path of the pilot air inside is also shifted from the flowing state to the initial closed state, pilot air is filled through the throttle valve 3 as shown by the arrow in FIG. 2D, so that the diaphragm of the upper air valve 4 The pressure inside the chamber 4b increases and the diaphragm 4a is pressed toward the inflow hole/outflow hole side, and the upper handpiece 1
At the same time, the flow path in the lower air control on-off valve 5 changes from the closed state to the flowing state. Then, the pilot air is released to the atmosphere as shown by the arrow in Fig. 2E from the lower hanger valve 2 whose flow path remains in the state of flow as shown in Fig. 2C, so the pressure of the pilot air decreases, and the lower The pressure inside the diaphragm chamber 4b of the air valve 4 also decreases, and the diaphragm 4a is bent toward the diaphragm chamber 4b, so that drive air, etc. can be supplied to the lower handpiece 1, and the lower handpiece 1 can operate. At the same time, the flow path of the pilot air in the upper air control on-off valve 5 shifts from the flowing state to the closed state, and when the lower hand piece 1 is again locked to the lower hanger valve 2 from this state, the lower Since the flow path in the hanger valve 2 is shifted from the flowing state to the closed state, pilot air is filled through the throttle valve 3, and the pilot air flow path in the upper air control on-off valve 5 changes from the closed state to the flowing state. At the same time, the pressure in the diaphragm chamber 4b of the lower air valve 4 increases and the diaphragm 4a is pushed toward the inlet and outlet holes, making it impossible to supply drive air, etc. to the lower handpiece 1 (Fig. 2). Return to state A.

The dental treatment device according to the present invention has the structure and operation described above, and whether the number of handpieces used is two or three or more, the drive air is only applied to the handpiece that is removed from the hanger valve first. etc., and the drive air etc. will not be supplied to the handpiece that is later removed from the hanger valve unless the handpiece that was removed from the hanger valve is first reattached to the hanger valve. While treating a patient using one handpiece, the assistant can change the grinding tool attached to the other handpiece for the next treatment, saving time on dental treatment. In addition to being able to shorten the time considerably, it has a simple structure that simply adds a new device consisting of an air-controlled opening/closing valve to a conventional dental treatment device, so it can be applied to conventional dental treatment devices with slight modifications. It has great practical and industrial value.

[Brief explanation of the drawing]

Fig. 1 is a piping explanatory diagram of one embodiment of a conventional dental treatment device, and Fig. 2 A, B, C, D, and E are diagrams of a dental treatment device according to the present invention in which two hand pieces can be used. FIG. 3 is an explanatory diagram of piping and operation of one embodiment of the dental treatment device according to the present invention in which four handpieces can be used, and FIG. FIG. 2B is a plan view of one embodiment of the air valve in the state shown in FIG. 2B; 1...Handpiece, 1a...Grinding tool, 1b...
...Air turbine, 2... Hanger valve, 3... Throttle valve, 4... Air valve, 4a... Diaphragm, 4b... Diaphragm chamber, 5... Air control opening/closing valve.

Claims (1)

[Claims] 1 In a dental treatment device that uses multiple handpieces, a throttle that limits the flow rate of pilot air supplied to each hanger valve (to be described later) where each handpiece is locked, for each flow path corresponding to each handpiece. When the 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 to reduce the pilot air pressure. Drive air, chip air, and cooling water supplied to each handpiece are installed in the pilot air flow path between the hanger valve, which is an atmospheric release valve, and the throttle valve and hanger valve corresponding to each handpiece. An air valve is provided in each of the pilot air flow paths between the air valve and the hanger valve corresponding to each hand piece, and the air valve changes the flow path from the blocked state to the flowable state by reducing the pressure of the pilot air. An air control on-off valve is provided that shifts each pilot air flow path corresponding to the remaining handpiece from a flowing state to a closed state when the pressure of pilot air in the air valve corresponding to the remaining handpiece decreases. A dental treatment device featuring: