JPH0333334B2 - - 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, in which a drive air for driving the air turbine is supplied to the air turbine 1b of each handpiece 1. Chip air blows away the grinding debris and cooling water cools the teeth to be ground. The transition from the supply stop state to the supply state is a flow in which the hand piece 1 is removed from the hanger valve 2, thereby changing the pilot air flow path from the communication state to the atmosphere open state. This was done using an air valve 3 that enabled the flow path to flow when the pilot air pressure decreased due to the path switching type hanger valve 2, so when one hand piece 1 was in use, it was impossible to connect the other hand piece 1 from the hanger valve 2. When removed, drive air, etc. is also supplied to the removed hand piece 1 later from the hanger valve 2, and the grinding tool 1a is driven and rotated, and cooling water is blown out. When replacing the grinding tool 1a attached to the handpiece 1, all hanger valves 2 must be in the same state as when the handpiece 1 is locked, which makes the work complicated and takes time for dental treatment. It had drawbacks.

The inventor of the present invention has conducted extensive research in order to solve these drawbacks, and has found that by combining a conventional device with an air-controlled on-off valve and a check valve, the drive air is applied 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 which is later removed from the hanger valve. 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 is provided in the flow path of pilot air between the air valve and the bunga valve corresponding to each handpiece, and the air valve is used when the pressure of the pilot air supplied from the hanger valve to which the handpiece is locked decreases. An air control on-off valve that changes the flow path corresponding to the remaining handpiece from a flowing state to a closed state when the pressure of the corresponding pilot air decreases, and each air control on-off valve is provided in parallel with each other, and the direction from the hanger valve to the air valve is The present invention provides a dental treatment device characterized in that it is provided with a check valve that allows pilot air to flow only between the teeth.

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

Fig. 2 is an explanatory diagram of the piping of one embodiment of the dental treatment device according to the present invention in which two handpieces can be used, and Fig. 3 A, B, C, and D each allow the use of two handpieces. FIG. 4 is an explanatory diagram of the operation of another embodiment of the dental treatment device according to the present invention, and FIG. Figure 5 shows one of the air valves used in the device of the present invention shown in Figure 2.
FIG. 3B is a plan view of the embodiment in the state shown in FIG. 3B;
Note that up to Figure 4, the drawings are too complicated, so the flow path to the air valve and handpiece is represented by the flow path for drive air, and the symbols indicating the air control on-off valve are used in Figures 2 and 4. 3 shows the normal state in which air, etc. is supplied, and each figure in FIG. 3 shows each operating state.

In the drawing, 1 is a grinding tool 1 attached to its tip.
The handpiece has a built-in air turbine 1b that drives and rotates the air turbine 1b, and is supplied with drive air for driving the air turbine 1b, tip air that blows out from the vicinity of the tip to blow away grinding debris, and cooling water that cools the teeth to be ground. , 2 is a flow path switch that changes the pilot air flow path from a communication state to an atmosphere open state when each handpiece 1 is removed from the locked state, thereby reducing the pressure of the pilot air supplied to the air valve described later. The type hanger valve 3 has a structure as shown in Fig. 5 and has a diaphragm 3.
Inflow holes and outflow holes for drive air, chip air, and cooling water that are supplied to the hand piece 1 through a diaphragm 3a are provided in one block through a diaphragm 3a.
The other block facing the air valve is equipped with a diaphragm chamber 3b, which is supplied with pilot air whose flow path is changed from a communication state to an open state to the atmosphere by a hanger valve 2. When the pressure of the pilot air supplied to the diaphragm chamber 3b decreases while air and water are being supplied via foot valves (not shown) that separately supply and stop air and water as necessary, the pressure of the pilot air decreases as shown in Fig. 5. As shown in the air valve 3 above, the diaphragm 3a is bent toward the diaphragm chamber 3b, and the necessary flow paths for each air/water are moved from the blocked state to the flowing state, and the hand piece 1 is allowed to flow through each air/water. The necessary things will be supplied. 4 are provided in the pilot air flow path between the hanger valve 2 and the air valve 3 corresponding to each hand piece 1 in the number corresponding to the other hand pieces 1. This is an air control on-off valve that shifts the flow paths corresponding to the remaining hand pieces 1 from a flowing state to a closed state when the pressure decreases. The flow path may be communicated anywhere between the hanger valve 2 and the air valve 3 corresponding to the remaining hand piece 1, as shown in FIG. 2 or 3. Reference numeral 5 designates a check valve which is provided in parallel with each air control on-off valve 4 and allows pilot air to flow only in the direction from the hanger valve 2 to the air valve 3.

The operation of the dental treatment apparatus according to the present invention having the above configuration will be explained based on FIGS. 3A to 3D.

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 of the pilot air is in a communicating state by the hanger valves 2 as shown in FIG. As a result, the pressure of the pilot air does not decrease and is directly supplied to the diaphragm chamber 3b of the air valve 3 and presses the diaphragm 3b, so the flow path for drive air etc. is blocked and the hand piece 1 is Never activated. From this state, when the upper hand piece 1 is removed from the hanger valve 2 as shown in FIG.
As the pilot air is discharged into the atmosphere as shown by the arrow and the pressure of the pilot air decreases, the pressure inside the diaphragm chamber 3b of the upper air valve 3 also decreases, and the diaphragm 3a for each air and water is moved to the diaphragm chamber 3b side. Since the hand piece 1 is in a bending state and drive air etc. can be supplied to the hand piece 1, only the upper hand piece 1 can be operated, while the pilot air flow path of the lower air control on-off valve 4 is blocked. Next, when the lower hand piece 1 is removed from the hanger valve 2 as shown in FIG. As shown by the broken line, the state is changed to open to atmosphere. However, since the lower air control on-off valve 4 has already blocked the pilot air flow path in the state shown in Fig. 3B, the pilot air is only discharged within the range indicated by the arrow in Fig. 3C. , high-pressure pilot air still exists in the diaphragm chamber 3b in the lower air valve 3, and drive air etc. are not supplied to the lower handpiece 1, and the upper pilot air flow path is In the state shown in Figure B, the pilot air flow path of the air control on-off valve 4 is closed while the pilot air pressure has decreased, and the pressure inside the diaphragm chamber 3b in the upper air valve 3 is reduced. Since the diaphragm 3a remains low and the diaphragm 3a is still bent toward the diaphragm chamber 3b, drive air etc. can be supplied to the upper hand piece 1, and only the upper hand piece 1 is operable. hold. Next, from this state, as shown in FIG. 3D, when the upper hand piece 1 that was previously removed from the hanger valve 2 is relatched to the upper hanger valve 2, the pilot air flow path of the upper hanger valve 2 is changed from the open state to the atmosphere. Since the communication state is established and pilot air is again supplied to the air control on-off valve 4 and check valve 5, pilot air is supplied into the diaphragm chamber 3b in the upper air valve 3 via the upper check valve 5. The diaphragm 3a is pressed so as to close the air/water inflow and outflow holes, making it impossible to supply drive air to the upper handpiece 1, and at the same time, the flow of pilot air from the lower air control valve 4 is interrupted. The passage is shifted to a flowing state, and the high-pressure pilot air remaining on the lower air valve 3 side from the lower air control on-off valve 4 is discharged as shown by the arrow, and is discharged from the diaphragm chamber 3b in the lower air valve 3. Since the pressure decreases, the diaphragm 3a is bent toward the diaphragm chamber 3b, and drive air, etc. can be supplied to the lower hand piece 1.
only becomes operational. Also, if the lower hand piece 1 is locked to the hanger valve 2 in this state,
The pilot air flow path in the lower hanger valve 2 is shifted from the atmosphere open state to the communicating state, and pilot air is again supplied to the pilot air flow path between the lower hanger valve 2 and the air valve 3. The pilot air flow path of the air control on-off valve 4 is shifted to the flow state, and pilot air is supplied into the diaphragm chamber 3b in the lower air valve 3 via the lower air control on-off valve 4 and the check valve 5, and the diaphragm is closed. 3a is pressed so as to close each air/water inflow hole and outflow hole, returning to the state shown in FIG. 3A in which drive air etc. cannot be supplied to the hand piece 1 below.

The dental treatment device according to the present invention has the structure and operation as described above, and whether the number of handpieces used is two or three or more, only the handpiece that is removed from the hanger valve first is supplied with drive air, etc. is supplied, and 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 re-latched 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, significantly reducing dental treatment time. In addition, it has a simple structure that simply adds a new device consisting of an air-controlled on-off valve and a check valve to a conventional dental treatment device, so it can be replaced with a conventional dental treatment device with a slight modification. It has great practical and industrial value, as it can be applied to

[Brief explanation of the drawing]

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

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 shifts each cooling water flow path from a blocked state to a flowable state when the pressure of pilot air supplied from a hanger valve locked to each handpiece decreases, and an air valve and hanger valve corresponding to each handpiece. an air control on-off valve that is provided in each pilot air flow path between the handpieces and shifts the flow paths corresponding to the remaining handpieces from a flowing state to a closed state when the pilot air pressure corresponding to a certain handpiece decreases; A dental treatment device characterized in that a check valve is provided in parallel with each air control on-off valve and allows pilot air to flow only in the direction from the hanger valve to the air valve.