JP3124654B2 - Dental instruments - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental instrument, and more particularly, to a method in which a pressurized fluid (for example, water) in use is stopped in a dental treatment when the pressurized fluid is stopped. Also, the present invention relates to an improvement in a dental instrument capable of minimizing the suction amount.

[0002]

2. Description of the Related Art In a dental treatment, as is well known, cooling water is supplied to a cutting portion to cool heat generated in a cutting portion of a tooth or the like, or to clean the cutting portion. Injecting has been done.

When the supply of these pressurized fluids is stopped, these pressurized fluids are sucked into the handpiece and pulled back to prevent them from dripping from the tip of the handpiece. However, at that time, the patient's saliva,
The cutting powder and the like are also sucked at the same time, and the saliva, the cutting powder and the like are discharged into the cavity of another patient at the next use, which is extremely unsanitary.

In order to solve the above-mentioned problem, Japanese Utility Model Publication No. 3-10977 discloses that when supply of pressurized fluid is stopped,
In a dental treatment unit that suctions a pressurized fluid, a fluid suction mechanism that minimizes the suction amount has been proposed.

FIG. 4 is a view for explaining an example of the dental treatment unit described in Japanese Utility Model Publication No. Hei 3-10977. In the figure, reference numeral 1 denotes a dental handpiece having a dental treatment instrument attached to the tip. , Are connected to the fluid switching mechanism 2. The fluid switching mechanism 2 is supplied with pressurized water as a pressurized fluid from a pressurized water source 3 via a water passage 4 as a fluid passage, a control valve 10, and a check valve 15. The control valve 10 is supplied with pressurized air from a pressurized air source 5 via an air passage 9, an opening / closing control valve 8, and a flow control valve 12. Then, the pressurized air and the pressurized water are transferred through the water passage 4 to the fluid switching mechanism 2.
Is to be fed to.

The pressurized air source 5 further includes a pressure control valve 1.
An air passage 6 is connected via the air passage 1 to supply pressurized air for driving an air turbine (not shown) of the handpiece 1 to the fluid switching mechanism 2 through the air passage 6. An air passage 7 is connected to the pressurized air source 5 via an opening / closing control valve 13 so that pressurized air for blowing off cutting chips, deposits and the like is sent to the fluid switching mechanism 2. I have.

FIG. 5 is a schematic sectional view showing the control valve 10 described above. Reference numeral 14 denotes a bypass passage from the air passage 6, 10 a denotes a rubber film which is pressed down by receiving pressurized air in the bypass passage 14, and 10 b denotes a rubber film A contact plate member 10c that slides in contact with the membrane 10a is a contact rod connected to the contact plate member 10b, 1
0d is a spring that pushes up the contact rod 10c upward, 10e is a tapered portion formed on the contact rod 10c, 10f is a tapered portion as a valve seat surface that opens and closes the water passage 4 by separating from and coming into contact with the tapered portion 10e, and 10g is a tapered portion. The groove communicates between the tapered portions 10e and 10f.

FIG. 6 is a view showing an example of the above-mentioned check valve 15. Reference numeral 17 denotes a hose as a part of a fluid passage which constitutes a water passage of the check valve 15, and includes a front insertion tube 15a and a rear insertion tube 15b. It is mounted so that it does not come off easily at each step. Reference numeral 15c denotes an intermediate connection tube as an intermediate connection portion that connects the front insertion tube 15a and the rear insertion tube 15b.
An elastic valve d is provided between the front insertion tube 15a and the rear insertion tube 15b via an intermediate connection tube 15c, and is made of an elastic material such as rubber or synthetic resin. Reference numeral 15e denotes a slit as an openable and closable valve hole formed near the center of the front tapered portion of the elastic body 15d.

When the foot controller 16 is operated by the foot operation of the dentist, one or more of the open / close control valves 8, 13 and the pressure control valve 11 are selectively opened, and the air passage 9, Air is supplied as compressed fluid to each of 7 and 6 from a source of pressurized air. The air passing through the opening / closing control valve 8 is supplied to the control valve 1 via the flow control valve 12.
0 is supplied. A pressurized body, which is a pressurized fluid, is also supplied from the pressurized water source 3 to the control valve 10 through the water passage 4, and the pressurized water is sent to the check valve 15 through the water passage 4 together with the air. ing.

That is, in the control valve 10 shown in FIG. 5, when compressed air for an air turbine is being sent to the air passage 6, the rubber film 10a is pressed down by receiving the air pressure, and the contact plate members 10b and 10b are pressed. The contact rod 10c is pushed down against the spring 10d. For this reason, the tapered portions 10e and 10f which have been joined so far are opened, the water channel 4 is also opened, and the mixed fluid passes through the control valve 10 and the check valve 1
5 and the handpiece 1. At this time, as shown in FIG. 6, a compressed fluid as a mixed fluid flows in the check valve 15 in the direction of the arrow, receives an extension force so that the elastic valve 15d expands, and a slit 15e as a valve hole is formed. Pushed open. For this reason, the fluid is supplied to the fluid switching mechanism 2 and the desired dental treatment by the handpiece 1 can be performed.

On the other hand, when the dentist stops the operation of the foot controller 16, the supply of air pressure from the pressure control valve 11 to the air passage 6 is cut off. Therefore, the compressed air to the bypass 14 of the control valve 10 in FIG. 4 is also shut off, and the pressing action of the compressed air on the rubber film 10a is also eliminated. Therefore, the contact plate member 10b receives the repulsive force of the spring 10d.
And the contact rod 10c slides upward, and each taper 10c
e and 10f are closed. At this time, a slight negative pressure is generated in the outlet water passage 4 of the control valve 10 by the return operation of the rubber film 10a, that is, the resilient operation from the downward protruding state to the flat state and further to the upward protruding state. For this reason, this negative pressure becomes a force for sucking water or air remaining in the handpiece 1 in the opposite direction.

The suction force is applied to the check valve 15 shown in FIG.
It acts immediately on the inside of the elastic valve 15d inside as well, and the extension operation of the elastic valve 15d is released, and the pushing / opening force on the slit 15e is also released, which closes. Therefore, the suction operation by the control valve 10 is performed by the check valve 1.
5 restricts only the amount necessary for suction, that is, the suction amount due to the volume difference between the expansion and the contraction, so that suction of saliva and cutting powder from the tip of the handpiece 1 can be suppressed.

[0013]

According to the above-mentioned prior art, the elastic valve 15d is provided in the pressurized liquid flow path leading to the handpiece 1. There is a possibility of adhesion and propagation, and it is preferable to perform sterilization work such as an autoclave from time to time. In addition, during long-term use, it is fatigue-damaged and cannot withstand use. Have to do it.

However, according to the prior art, the elastic valve is incorporated in the middle of the hose of the pressurized fluid flow path, which is inconvenient for autoclaving. It had to be disconnected once, which made the task cumbersome.

The present invention has been made in view of the above circumstances, and particularly when the above-mentioned elastic valve is autoclaved or replaced, without disconnecting the hose from the hose forming the pressurized fluid flow path. The purpose is to simplify the autoclave and replacement work of the elastic valve.

[0016]

In order to achieve the above object, the present invention provides (1) a handpiece part and a hose part for supplying water to the handpiece part, wherein the hose part is provided with the hand. What is claimed is: 1. A dental instrument in which pieces are detachably connected to each other so that water can be supplied to the handpiece. A male mouthpiece for supplying water to the handpiece is provided on an end surface of the hose. A dental instrument having a female cap which is engaged with the male cap in a liquid-tight manner on an end face of the hand piece section opposite to the end face of the hose section, wherein the female cap is By the pressurized fluid supplied through the male metal port, the distal end is opened in the supply direction of the pressurized fluid, and when the pressurized fluid is stopped, a valve body made of an elastic member closing the valve hole is detachably attached. The hand is attached The valve body is characterized in that the valve body is formed integrally with the female mouth in a fluid passage that is detachable from the handpiece section, or (2) the handpiece section. A power unit detachably connected to the handpiece unit; and a hose unit detachably connected to the power unit and supplying water to the handpiece unit through the power unit. A dental instrument configured to detachably connect the handpiece portion to the hose portion so that water can be supplied from the hose portion to the handpiece portion via the power portion. A male ferrule for supplying water to the handpiece is provided, and a female ferrule which is liquid-tightly engaged with the male ferrule is detachably attached to an end face of the handpiece opposite to the end face of the power part. Dental instruments Oite, the female die is by pressurized fluid supplied through the male ferrule, the direction of supplying the pressurized fluid to open the valve hole, wherein the time of stopping the pressurized fluid, the elastic member to which the tip is closed The valve body consisting of is detachably mounted, inside the hand piece portion,
The valve body is formed in a fluid passage that is detachable from the handpiece part integrally with the female mouthpiece.

[0017]

In the pressurized fluid flow path formed in the handpiece portion, a check valve which is detachably mounted only when the handpiece portion is disconnected from the hose portion or the power portion is provided. Only when the part was disconnected, the check valve could be replaced without disconnecting the pressurized fluid flow path.

[0018]

FIG. 1 is a sectional view showing a main part of a dental instrument according to an embodiment of the present invention. FIG. Is omitted.

2 (a) and 2 (b) show examples of the configuration of a dental instrument to which the present invention is applied. In the figures, I is a hose, II is a handpiece, and III is a power unit. And Figure 2
(A) shows an example of an air turbine, and as is well known, a hose part I and a handpiece part II are detachably connected,
The turbine provided at the tip (head) of the handpiece part II is rotated at high speed by pressurized air supplied through the hose part I and the handpiece part II, and the blade (bar) attached to the turbine is used to remove teeth. It performs cutting and the like.

FIG. 2B shows an example of a micro engine. As is well known, the hose I, the power III, and the handpiece II are detachably connected to each other, and the power supplied from the hose I is provided. By rotating the motor provided in the power section III, the rotation of the motor is transmitted to the head section of the handpiece section II through the spindle mechanism, and the blade mounted on the head section is rotated to rotate the tooth blade. For cutting and polishing.

FIG. 3 is an enlarged view for explaining an example of a portion to which the present invention is applied. FIG. 3 is an exploded view of the micro engine shown in FIG. 2B. In FIG. 3, II denotes a handpiece portion, III denotes a power portion, and II 'denotes a junction sleeve. As is well known, a water circuit, an air circuit, an illumination light circuit, and the like are integrally incorporated in the junction sleeve II'. After these necessary members are assembled, they are incorporated into the handpiece part II and integrated.

According to the present invention, the valve body 20 can be detachably mounted on the end face of the junction sleeve II '(accordingly, the end face of the handpiece II) by means of the valve retainer 21 and the stop screw 22. Thereby, the valve body 20 can be autoclaved integrally with the handpiece II, and further, the valve body 20 can be easily replaced.

In FIG. 1, reference numeral 30 denotes a male base provided on the power unit III. The male base 30 is provided on a hose in the case of an air turbine. A pressurized fluid, for example, cooling water, is supplied from a source.

Reference numeral 20 denotes a valve body which is detachably disposed in the junction sleeve II '. The valve body 20 is a female base 20a.
And an elastic valve 20b detachably attached to the outlet side of the female mouthpiece 20a. This valve element 20 is detachably attached to the junction sleeve II 'by the valve retainer 21 and the stop screw 22 as described above.

However, when it is desired to replace the elastic valve 20b, when the valve retainer 21 is removed, the valve body 20 can be taken out from the junction sleeve II ', and at the same time, the elastic valve 20b can be taken out. After being taken out, the elastic valve 20b is replaced with a new one, returned to the junction sleeve II 'again, and held by the valve retainer 21, so that it can be used in the same manner as a normal handpiece thereafter. When the handpiece is autoclaved, the valve body 20 is also autoclaved.

The operation of the elastic valve 20b is exactly the same as that of the elastic valve 15d shown in FIG. 6, and during a dental treatment, while a pressurized fluid such as cooling water or spray is supplied, a valve hole (slit) is provided.
When the cooling water or spray is injected and the treatment is completed and the supply of these pressurized fluids is stopped, the valve hole 20b 'is immediately closed, the suction amount is minimized, and the pressure from the head portion is reduced. Drops of droplets can be eliminated.

[0027]

As is apparent from the above description, according to the present invention, the elastic valve can be incorporated in the handpiece with a simple structure, and the autoclave can be integrally formed with the handpiece. The replacement can be easily performed by a simple operation.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of a dental handpiece according to the present invention.

FIG. 2 is a diagram showing an example of a dental instrument to which the present invention is applied.

FIG. 3 is an exploded view of an instrument for explaining a place to which the present invention is applied.

FIG. 4 is a diagram showing a schematic configuration of a dental treatment unit to which the present invention is applied.

FIG. 5 is a detailed view of the control valve 10 shown in FIG.

FIG. 6 is a detailed view of the check valve 15 shown in FIG.

[Explanation of symbols]

I ... Hose part, II ... Handpiece part, III ... Power part, I
I '... Junction sleeve, 20 ... Valve, 20a ...
Female base, 20b ... elastic valve, 20b '... valve hole, 21 ... valve stop member, 22 ... stop screw, 30 ... male base.

Claims (2)

(57) [Claims] 1. A handpiece part and a hose part for supplying water to the handpiece part, wherein the handpiece part is detachably connected to the hose part to supply water to the handpiece part. The dental instrument as described above, wherein the end portion of the hose portion has a male base for supplying water to the handpiece portion, and the end surface of the handpiece portion facing the end portion of the hose portion, In a dental instrument for detachably attaching a female base which is liquid-tightly engaged with the male base, the female base is provided with a pressurized fluid supplied through the male base, and a supply direction of the pressurized fluid. its in
When the pressurized fluid stops, the tip of the
A valve body made of an elastic member whose part is closed is detachably mounted, and inside the handpiece portion, the valve body is formed integrally with the female mouth as a fluid passage that is detachable from the handpiece portion. A dental instrument characterized by that: 2. A handpiece part, a power part detachably connected to the handpiece part, and a hose detachably connected to the power part and supplying water to the handpiece part through the power part. A dental instrument comprising a power unit, the handpiece unit detachably connected to the power unit, and water supplied from the hose unit to the handpiece unit via the power unit. The power part end face has a male base for supplying water to the handpiece part, and the end face of the handpiece part facing the power part end face is liquid-tightly engaged with the male base. In a dental instrument which makes a female base detachable, the distal end of the female base is opened in a supply direction of the pressurized fluid by a pressurized fluid supplied through the male base, and the female cap is opened. When pressurized fluid is stopped A valve body made of an elastic member whose front end is closed is detachably mounted, and a fluid passage in which the valve body can be attached to and detached from the handpiece section integrally with the female mouthpiece in the handpiece section. A dental instrument characterized by being formed in.