JPS6144020B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dental handpiece that cuts teeth by rotating an air turbine or an air motor driven by pressurized air, and a dental handpiece that performs dental treatment by ejecting pressurized air from a tip nozzle. For example, in a dental unit equipped with a plurality of dental treatment instruments operated by pressurized air such as dental syringes, even when one treatment instrument is in use, parts of other treatment instruments such as the cutting bar of the handpiece can be easily removed. The present invention relates to a pressurized air control device for dental treatment instruments that allows for replacement of parts and repair of defective parts. Normally, dental units have a handpiece that is driven by multiple pressurized airs with different rotational speeds and rotational torques to cut teeth, etc., and a nozzle at the tip, which the technician can select according to the type of treatment. compressed air,
It is equipped with dental treatment instruments such as syringes that spray water or mist to dry and clean patients, etc., and all hangers that maintain the treatment instruments in their original state are equipped with air controls that control the supply of pressurized air. A signal switch is provided, and when the treatment instrument is removed from the hanger, the air signal switch is activated to supply pressurized air to the treatment instrument. Therefore, according to the conventional arrangement, when a technician is performing dental treatment with a treatment instrument that has been removed from the hanger, and when an assistant is removing it from the hanger, for example to replace a cutting bar on another handpiece, The handpiece is also driven by the supply of pressurized air from the air signal switch, making it difficult to perform tasks such as replacing parts of other treatment instruments while performing dental treatment with one treatment instrument. However, this method has the disadvantage of not being able to perform treatment, and this also has the disadvantage of impairing treatment efficiency.

Therefore, the present application provides a pressurized air control device for a treatment instrument that eliminates such drawbacks.The embodiments of the present application will be described in detail below with reference to the drawings. Further, the solid lines indicate pressurized air paths for control signals, and the pressurized air source 1 includes a normally closed foot controller 4 that controls the flow of pressurized air for driving via a filter 2 and a pressure reducing valve 3. is connected to the output side of this foot controller, and a plurality of dental handpieces 5 _a , 5 _b , 5 _c with different rotation speeds and rotation torques are connected to the output side of this foot controller.
and a dental syringe 6 that ejects pressurized air from a tip nozzle, and normally closed main valves 7 _a , 7 _b , 7 _c , and 7 _d that are electrically connected by corresponding air signals, respectively, and the treatment instrument 5 _a , 5 _b , 5 _c ,
6 is driven by conduction of main valves 7 _a , 7 _b , 7 _c , and 7 _d . Further, the output side of the pressure reducing valve 3 is closed when the treatment instrument is latched, and conducts when the latching is released, and the corresponding main valves 7 _a , 7 _b , 7 are connected to each other.
Hanger switch 8 that applies air signals to _c , 7 _d
a , _8b , _8c , and _8d are connected, respectively. And each of these hanger switches _8a , _8b , _8c , _8d
are pressurized air actuators _9a , which prevent the conduction state of the hanger switches _8a , _8b , _8c , and _8d when an air signal is input, regardless of whether the treatment instrument is unlatched.
9 _b , 9 _c , and 9 _d are respectively disposed, and each of these operating bodies 9 _a , 9 _b , 9 _c , and 9 _d receives air from other hanger switches other than the corresponding hanger switch. Control mechanism 10 for supplying signals respectively
_a , _10b , _10c , and _10d are connected, respectively.
This control mechanism has a plurality of inlets and one outlet, and this one outlet has a function of selecting the inlet with the highest pressure among the plurality of inlets, and the four treatment instruments 5 _a , 5 _b , _5c , 6, each control mechanism _10a , _10b ,
10 _c and 10 _d are connected to two shuttle valves 11 _a1 and 1, respectively.
1 _a2 , 11 _b1 , 11 _b2 , 11 _c1 , 11 _c2 , 11 _d1 ,
11 _d2 , each output side of which is connected to the signal input terminal of the corresponding actuating body 9 _a , 9 _b , 9 _c , 9 _d , and the three input sides of the control mechanism 10 a are connected to the three input sides of the control mechanism 10 _a . The signal output sides of the other hanger switches 8 _b , 8 _c , 8 _d that do not correspond to the respective signal output sides, and the three input sides of the control mechanism 10 _b are connected to the signal output sides of the other hanger switches 8 _a , 8 _c , 8 _d that do not correspond thereto. Each signal output side is connected to the three input sides of the control mechanism 10c, and each signal output side of the other hanger switches 8 _a , 8 _b , 8 _d that does not correspond thereto is connected to the three input sides of the control mechanism 10 d. is for other hanger switches 8 _a , 8 _b , 8 that do not correspond to it.
This shows the case where each signal output side of _c is connected respectively. FIG. 3 shows a vertical cross-sectional view of the hanger part of the dental unit, in which there is a gap between the distal end of the cylindrical body 12 which extends horizontally and has an open end with a diagonal notch, and the inner lower surface of the cylindrical body 12. to form a hollow part 13,
In addition, a base plate 15 having a hole 14 is fixed to the rear part. Reference numeral 16 denotes a mounting plate whose rear end is rotatably pivoted to a bearing plate 17 fixed to the lower surface of the cylindrical body 12 and whose tip extends to the tip of the upper surface of the base plate 15; The hollow portion 1 is located in the pivot portion 18 of the
A pressing piece 19 extending inside the mounting plate 16 is fixed thereto, and a reinforcing member 20 is provided which is bent in an L-shape along the front surface of the pressing piece 19 and the lower surface of the mounting plate 16. The plate 16 is constantly urged in the lifting direction by a spring 21. 22 is the aforementioned mounting plate 16
A member that operates the hanger switch so as to cut off the pressurized air signal by pressing the notch 23 when the hanger is in a prone state, and to project the notch 23 and conduct the pressurized air signal when the mounting plate 16 is tilted upward. and is fixed to the inner lower surface of the cylindrical body 12. Reference numeral 24 denotes a member that operates the actuating body so as to prevent the mounting plate 16 from being lifted up by protruding the holding note 25 and pressing the pressing piece 19 backward in response to a pressurized air signal; It is fixed to the inner lower surface of 12. 25 is a guide roller that guides a flexible hose 26 for supplying pressurized air.

When an arbitrary hand piece 5 _a is removed from the hanger for cutting a tooth, for example, the hanger switch 8 _a becomes conductive, and in this state, the mounting plate 1
6 is tilted upward by a spring 21, and the pressurized air passes through the hanger switch _8a corresponding to the handpiece 5a and the corresponding main valve 7a _.
is supplied to the signal input end of this main valve 7 _a
becomes conductive, and at the same time, hanger switch 8
The pressurized air output from _a is input to the control mechanisms 10 _b , 10 _c , and 10 _d other than the control mechanism 10 _a corresponding to the hanger switch 8 _a , so each of the operating bodies 10 _b corresponding to them is , 10 _c , 10 _d project the holding notches 25 by a pressurized air signal to maintain the horizontal state of the corresponding mounting plate 16 and prevent the notches 25 from protruding, thus preventing the other hanger switches 8 _b , 8 _c and 8 _d maintain the inoperative state irrespective of the release of the corresponding therapeutic instruments. From this state, if you step on the foot controller 4 to make it conductive, the hanger switch 8
Only _the hand piece 5 _a removed from the pressurized air supply source 1 receives pressurized air and is rotationally driven. On the other hand, in this state, the other handpieces 5 _b and 5 _c
Even if the syringe 6 is removed from the hanger for reasons such as replacing parts, the hanger switch 8
_b , _8c , and _8d are the corresponding actuating bodies _9b , _9c , and _9d, respectively.
Since the handpieces 5 _b , 5 _c or the syringe 6 are held inactive by the pressurized air, they are not actuated by pressurized air. This effect is exactly the same even when the other hand pieces 5 _b , 5 _c and one of the syringes 6 are removed from the hanger for treatment purposes.

In the above embodiment, a control device is described in which four therapeutic instruments are provided, but FIG. 2 shows a circuit diagram of the control device in which two therapeutic instruments are provided. That is, in this embodiment, the output end of the hanger switch _8a ' is connected to the handpiece 5.
On the input side of the other actuating member 9 _b ′ that does not correspond to _a ′,
In addition, the output side of the other hanger switch 8 _b ′ is connected to the input side of one actuating member 9 ′ that does not correspond to the hand piece 5 _b ′, and the control mechanism is omitted. The operation in is similar to that in the embodiment shown in FIG.

In the above embodiment, a normally closed foot controller 4 that is turned on by foot operation is connected to the air source 1 as the controller section, but as shown in FIG. It is noted that the foot controller 4' may be composed of a foot controller 4' and an operating valve 4'' that conducts a pressurized air passage in response to an air signal when the foot controller 4' is stepped on. We have shown the case where the main valve is made conductive by the pressurized air signal from the hanger switch when the stop is released.
As shown in FIG. 5, an air operated switch which is normally closed and outputs a pressurized air signal is used as the hanger switch, and a valve 7 which is turned on by a zero air signal is used as the main valve.
It is further noted that the valve 7 may be configured to be energized by a zero pneumatic signal from the pneumatically actuated switch when the treatment instrument is unlatched, and that each of the above embodiments also provides an arrangement in which the hanger switch causes the treatment instrument to be placed on the hanger. We have described the case where the device closes when hung and becomes conductive when the treatment device is removed from the hanger, but for example, in the case of the support device for the treatment device shown in Japanese Utility Model Publication No. 51-45189, it closes when the treatment device is in its restored state. It goes without saying that the hanger switch is configured to be conductive when the hanger switch is closed and the support tube is tilted while gripping the treatment instrument.

As described above, according to the present application, when a technician is using any one treatment instrument for dental treatment,
It is extremely convenient to use, as a caregiver or the like can easily remove other treatment instruments from the hanger and replace parts or repair them as needed without interfering with the treatment work. It can improve treatment efficiency and operates using pressurized air. Since the hanger part that operates the hanger switch is fixed in an inoperative state by the air actuating body, the hanger part in the inactive state can be easily confirmed from the outside, making it convenient to use.
It also has the advantage of reliable operation.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a control circuit diagram when four treatment instruments are provided, FIG. 2 is a control circuit diagram when two treatment instruments are provided, and FIG. 3 is a hanger. The longitudinal cross-sectional view, FIGS. 4 and 5 are partial views showing other embodiments. In the figure, 1 is the air source, 4 is the foot controller, and 5 is the air source.
_a , 5 _a ', 5 _b , 5 _b ', 5 _c are hand pieces, 6 is a syringe, 7 _a , 7 _a ', 7 _b , 7 _b ', 7 _c , 7 _d are main valves, 8 _a , 8 _a ′, 8 _b , 8 _b ′, 8 _c , 8 _d are hanger switches, 9 _a , 9 _a ′, 9 b , 9 _{b ′} , 9 _c , 9
_d is an operating body, and 10 _a , 10 _b , 10 _c , and 10 _d are control members.

Claims (1)

[Scope of Claims] 1. An air source, a controller connected to the air source to control the supply of pressurized air, and a controller connected in parallel to the air source and configured to control the treatment equipment in correspondence with each treatment equipment. When held in hand from the holding state, a plurality of hanger switches are connected to each other by the movement of the corresponding hanger parts, and are connected to the output ends of the controller, and pressurized air is supplied by inputting an air signal from the corresponding hanger switches. a plurality of normally closed main valves that supply the corresponding treatment instruments; a plurality of pneumatic actuators that keep the hanger section movable in an inoperative state by inputting an air signal; and other hanger switches other than the above-mentioned hanger switches. 1. A pressurized air control device for a dental treatment instrument, comprising a plurality of shuttle valves that are actuated by air signals from and output air signals to corresponding air operating bodies. 2. The pressurized air control device for a dental treatment instrument according to claim 1, wherein the controller comprises a foot controller. 3. Pressurization of a dental treatment instrument according to claim 1 or 2, in which the hanger part is constantly lifted up by a spring and moves down against the spring due to its weight when the treatment instrument is placed. Air control device.