KR101919710B1 - System for handpiece using dental suction device - Google Patents

Abstract

Disclosed is a handpiece system for supplying oil to a handpiece by using a dental suction device or for improving the driving force of the handpiece. According to the present invention, the handpiece system using a dental suction device comprises: a handpiece including a head part which has a rotor therein and a body part which generates a driving force to rotate the rotor and has an air supply pipe for supplying air into the head part when the rotor is rotated and an exhaust pipe for discharging the air passed through the head part; a suction unit including a suction pipe and a suction tip; and a connection unit having one end which is connected to the suction pipe or the suction tip and the other end which is connected to the exhaust pipe, and allowing the air in the handpiece to be sucked into the suction unit through the exhaust pipe when the suction unit is operated. According to the present invention, oil is supplied to the inside of the handpiece simply and conveniently without separating the handpiece such that the foreign matter introduced into the head of the handpiece can be easily and conveniently removed and discharged, and the handpiece can be managed. Furthermore, it is not necessary to be acquainted with a complicated management method for the management and maintenance of the handpiece, thereby providing convenience to a user. Further, the driving force of the handpiece can be improved by driving the handpiece and the suction device while the suction device is connected to the exhaust pipe of the handpiece, thereby providing convenience to the user.

Description

Technical Field [0001] The present invention relates to a handpiece system using a dental suction device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handpiece system, and more particularly, to a handpiece system for supplying oil to a handpiece using a dental suction device or improving a driving force of a handpiece.

In general, a dental handpiece is used to remove and remove a portion of a tooth to treat a tooth. Inside the handpiece, driving means for generating a driving force composed of a driving motor, a bearing, a shaft, And a burr (grinding tip) used to remove the teeth.

In order to solve this problem, when the burr is to be removed from the dental handpiece, there is a problem that the driving means, the rotor and the burr are infiltrated with the saliva, the blood or the foreign matter into the handpiece, After washing with oil injecting means, it is used by disinfection with a sterilizer.

However, in the case of cleaning through the oil injecting means, it is troublesome to separate the handpiece from the unit chair and fix it to the oil injector or the oil spray can for the oil injection. The washing process is often avoided.

Therefore, there is a need to search for a method for introducing oil into the interior of the handpiece by a simple and convenient process without complicated procedures, to remove and discharge foreign matter, and to supply oil to the components.

Korean Patent No. 10-1100242 (entitled "Dental Handpiece Lubricator")

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems as described above, and it is an object of the present invention to provide a suction device for a vacuum cleaner, which is capable of connecting a suction device to an exhaust pipe of a handpiece, The present invention provides a handpiece system in which oil is supplied to the inside of a handpiece simply and conveniently by utilizing the principle that oil is sucked.

Another object of the present invention is to provide a suction device for a vacuum cleaner in which suction force generated by a suction device is discharged through an exhaust pipe of a handpiece when the suction device is driven while a suction device is connected to an exhaust pipe while the handpiece is being driven by compressed air. And to improve the driving force of the handpiece by helping to discharge the air.

According to an aspect of the present invention, there is provided a handpiece system using a dental suction device, comprising: a head having a rotor therein; a driving unit for generating a driving force for rotating the rotor; A handpiece including an air supply pipe for supplying air to the head part and a body part having an exhaust pipe for discharging air passed through the head part; A suction unit including a suction pipe and a suction tip; And a connection unit which is connected to the suction pipe or the suction tip at one end and is connected to the exhaust pipe so that the suction air is sucked into the suction unit through the exhaust pipe when the suction unit operates, Lt; / RTI >

In the handpiece system using the dental suction device according to the present embodiment, when oil is sucked by the suction unit while the head unit of the handpiece is in a state of being accommodated in the oil, Wherein the suction unit is operated so that when the internal air is discharged to the suction unit, the internal pressure of the suction unit is lowered So that the oil can be introduced through the head portion.

The head unit includes: a bearing provided at an upper end and a lower end of the rotor to support and rotate the shaft of the rotor; And a cap provided on an upper side of a bearing provided at an upper end of the rotor and a lower side of a bearing provided at a lower end of the rotor, wherein the head unit is configured such that the suction unit When actuated, the oil may flow into the gap between the cap and the bearing.

In addition, the oil supply unit may be formed of a transparent material so that the suction of the oil and the degree of suction (degree) can be visually confirmed.

The oil supply unit may further include: an oil accommodating portion for accommodating oil therein; A cap portion mounted to cover the upper end of the oil receiving portion; And the oil accommodating portion is located on the upper side while the cap accommodating portion is mounted on the oil accommodating portion, and when the cap portion is positioned on the lower side, a predetermined amount of oil contained in the oil accommodating portion flows And the oil introduced through the oil inflow groove is received. Even if the position of the oil accommodating portion and the cap portion is restored, a part of the accommodated oil is not discharged to the oil accommodating portion located at the lower side And an oil cup provided with an oil receiving groove for maintaining the accommodated state, wherein the cap portion is provided at a lower center of the cap and pushes the oil cup downward when mounted on an upper end of the oil receiving portion; Wherein the oil supply unit is provided at a lower end of the oil cup, and when the cap is separated from the oil receiving portion, It may further include; by a flow pin, the oil cup of the compression spring such that the pressed state by the lower oil cup is restored to the original position.

The connecting unit is configured such that, when the handpiece and the suction unit are operated, the air passed through the head unit is sucked into the suction unit through the exhaust pipe by the operation of the suction unit, The driving force of the handpiece can be improved.

The connection unit may be arranged such that a plurality of paths through which the oil or the air are conveyed are formed, wherein a specific route among the plurality of routes is selected depending on whether the suction unit operates or not, Air can be transported.

And the connection unit includes: a first path tube having one end connected to the suction pipe or the suction tip; A second path tube having one end connected to the exhaust pipe; A third path tube having an exhaust port at one end thereof for allowing the air inside the handpiece to discharge air to the outside; And a path branching section connected to the other ends of the first, second, and third path tubes so as to select a specific path among the plurality of paths, A first valve and a third valve for controlling the opening and closing of the path are provided at the first and third terminals separately connected to the pipe and the third path pipe, and when the suction unit is operated, And the third valve is closed so that the air passing through the head portion is sucked into the suction unit through the exhaust pipe or the oil is introduced through the head portion by the operating suction unit, When the suction unit is not operated and only the handpiece is operated, the first valve is closed and the third valve is opened, so that air passed through the head portion is discharged to the third path Through it may be discharged to the outside.

As a result, the oil is supplied to the interior of the handpiece simply and conveniently without separating the handpiece, thereby removing and discharging the foreign matter introduced into the head of the handpiece conveniently and conveniently, It is possible to manage the handpiece so as to prevent abrasion, and furthermore, it is not necessary to know the complicated management method for the management and maintenance of the handpiece, thereby providing convenience to the user.

Further, the driving force of the handpiece is improved by driving the handpiece and the suction device in a state in which the suction device is connected to the exhaust pipe of the handpiece, thereby providing convenience to the user.

Further, the oil supplied to the handpiece is colored, and the oil supplying means is formed of a transparent material so that the supply of the oil and the supply process of the oil can be confirmed with the naked eye of the user, The oil is prevented from being excessively consumed, which can also be of benefit in economic terms.

1 is a schematic view of a handpiece system using a dental suction device according to an embodiment of the present invention.
FIG. 2 is a view for explaining the construction of a handpiece system using a dental suction device according to an embodiment of the present invention in more detail.
FIG. 3 is a view showing an oil inflow path when oil flows into the handpiece through a handpiece system using a dental suction device according to an embodiment of the present invention.
FIG. 4 is a view illustrating a handpiece of the handpiece system using the dental suction device according to an embodiment of the present invention. Referring to FIG.
FIG. 5 is a view showing the inflow path of oil when the oil flows into the inside of the head through the handpiece system using the dental suction device according to the embodiment of the present invention.
FIG. 6 is a view for explaining connection units among constituent elements of a handpiece system using a dental suction apparatus according to an embodiment of the present invention.
FIG. 7 is a view illustrating the oil supply unit among the components of the handpiece system using the dental suction device according to an embodiment of the present invention in more detail.
8 is a view for explaining the oil supply unit according to another embodiment of the present invention in more detail.

Hereinafter, the present invention will be described in detail with reference to the drawings. The embodiments described below are provided by way of example so that those skilled in the art will be able to fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below and may be embodied in other forms.

FIGS. 1A to 1B are schematic views of a handpiece system using a dental suction apparatus according to an embodiment of the present invention. FIGS. 2A to 2B are views showing a hand using a dental suction apparatus according to an embodiment of the present invention. Lt; RTI ID = 0.0 > 1 < / RTI >

Hereinafter, a handpiece system using a dental suction device according to an embodiment of the present invention will be described with reference to FIGS. 1A and 2B.

When the handpiece 100 and the suction unit 200 are driven with the suction unit 200 connected to the exhaust pipe 113 of the handpiece, the suction force generated by the suction unit 200 Is transmitted to the head through the exhaust pipe (113) of the handpiece to improve the driving force of the handpiece (100).

To this end, the handpiece system may include a hand unit 100, a suction unit 200, and a connection unit 300 provided to connect the handpiece 100 and the suction unit 200. [

The handpiece 100 according to the present embodiment includes a head 123 provided with a rotor 123 for receiving air from a separately provided air supply means C and rotating the ball 123 to remove a portion of teeth, A body part 110 that generates a driving force for rotating the rotor 123 and the rotor 123 and supplies air and cooling water to the head part 120 when the rotor 123 rotates, And a burr 130 that rotates together with the rotor 123 to remove a portion of the tooth when the rotor 123 is rotated.

The suction unit 200 is provided with an air compressor 210 for compressing air to generate suction phenomenon of air by sucking various kinds of inhaled substances such as saliva, A sucking pipe 220 connected to the air compressor 210, and a suction tip (not shown) connected to the suction pipe 220 for sucking various inhaled substances.

Here, the air compressor 210 includes a vacuum tank (not shown) in which a vacuum is formed by compression means (not shown) for compressing air and a cooling means (not shown) for cooling the compressed air by a compression means .

The connection unit 300 connects the handpiece 100 and the suction unit 200 to allow air to be sucked from the suction unit 200 when the suction unit 200 operates, Not only the air but also the inside air of the connected handpiece 100 can be sucked.

For example, when the handpiece 100 and the suction unit 200 are operated, the connection unit 300 is configured such that the air passed through the head unit 120 is discharged to the discharge pipe 113 The turbo operation of the handpiece 100 can be performed more efficiently than when the handpiece 100 is operated without the assistance of the suction unit 200. [

To this end, the connection unit 300 includes a first path tube 310 connected to the suction pipe 220 or a suction tip (not shown), one end connected to the first path tube 310, And a second path tube 320 connected to the handpiece 100.

On the other hand, in the present handpiece system, the suction unit 200 is connected to the exhaust pipe 113 of the handpiece 100 to utilize the principle that the oil is sucked into the fine gap existing in the head of the handpiece 100, The suction unit 200 and the connection unit 300 in order to supply the oil to the inside of the handpiece 100. The handpiece 100 is connected to the handpiece 100 in addition to the handpiece 100, An oil supply unit 400 may be further provided for supplying oil to the oil supply unit 400.

The oil supply unit 400 is provided for supplying oil through the head part 120 of the handpiece. For example, the oil supply unit 400 may be made of a transparent material so as to receive oil therein, so that whether or not the oil is inhaled and the degree of suction (degree) can be visually confirmed. At this time, the oil is colored so that the transparent material and the colored oil can easily be contrasted with the naked eye.

The oil supply unit 400 may allow the oil to flow into the head unit 120 of the handpiece when the suction unit 200 operates while the head unit 120 of the handpiece is stationary.

This is because the internal air of the handpiece 100 is discharged to the suction unit 200 through the exhaust pipe 113 connected to the connection unit 300 and the air pressure inside the handpiece 100 is lowered, The oil is supplied from the oil supply unit 400 together with the air to be sucked.

3, 4A and 5 are views for explaining an oil inflow path when oil is introduced into the handpiece 100 through a handpiece system according to an embodiment of the present invention, FIG. 4B is a view for explaining a conveyance path of air when a turbo operation for improving the driving force of the handpiece 100 is performed through the handpiece system according to an embodiment of the present invention.

3 to 5, the process of supplying oil to the interior of the handpiece 100 and the process of performing the turbo operation to improve the driving force of the handpiece 100 will be described in more detail I will explain.

When the driving force is generated through the body 110 of the handpiece 100, the generated driving force is transmitted to the head 120 to rotate the rotor 123, The rotor 130 is rotated and the air and the cooling water can be supplied to the head unit 120 provided with the rotor 123 when a part of the tooth is removed.

To this end, the body part 110 of the handpiece 100 is provided with driving means (not shown) for generating driving force, an air supply pipe 111 for supplying air to the head part 120, and an air supply pipe 111 A cooling water supply pipe 115 for supplying cooling water to the head unit 120 and a cooling water supply pipe 115 for supplying cooling water for supplying air to the cooling water supply pipe 115. [ An air supply pipe 117 may be provided.

The air supply pipe 111 is connected to a separate air supply means C so that the air supplied from the connected air supply means C is introduced into the handpiece 100 when the handpiece 100 is operated. And the inflow air can be transferred to the head part 120 via the body part 110. [

At this time, the air transferred to the head part 120 can be discharged through the exhaust pipe 113 via the rotor 123.

In addition, the exhaust pipe 113 is connected to the second path pipe 320 of the connection unit 300 so that when the handpiece 100 does not operate and only the suction unit 200 operates, The inside air is discharged and can be sucked into the suction unit 200 through the connection unit 300. At this time, the air supply pipe 111 does not operate the handpiece 100 but operates only the suction unit 200, so that the internal air of the handpiece 100 is sucked into the suction unit 200 through the exhaust pipe 113 The air is supplied from the separate air supply means C or the air is not discharged so that the exhaust pipe 113 discharges the internal air.

In addition, when the exhaust pipe 113 discharges the air inside the handpiece 100, the handpiece 100 having the internal air pressure lowered allows the outside air to flow through the head part 120. At this time, When the head unit 120 is mounted on the unit, oil can be introduced from the oil supply unit through the head unit 120. [

That is, when the air inside the handpiece 100 is discharged through the connection unit 300, the air pressure inside the handpiece 100 is lowered, and the handpiece 100 having the lower air pressure is moved to the head 120 To allow air to flow in, or to allow oil to flow from the oil supply unit 400.

When the handpiece 100 is driven, the cooling water supply pipe 115 is connected to a separately provided cooling water supply means (not shown) to allow the cooling water to flow into the handpiece 100, (Not shown) to the head unit 120 via the guide member 110.

The head unit 120 of the handpiece includes a head casing 121 provided to surround the outside of the rotor 123 in addition to the rotor 123 described above, a chamber 125 provided on the upper side of the rotor 123, A bearing 127 provided at the upper end and the lower end of the rotor 123 for supporting the shaft of the rotor 123 and allowing the rotor 123 to rotate and an upper side of the bearing 127 provided at the upper end of the rotor 123, And a cap 128 provided on the lower side of the bearing 127 provided at the lower end of the rotor 123.

More specifically, when the handpiece 100 does not operate and only the suction unit 200 operates, oil flows into the head unit 120. The path of the head unit 120 is such that the upper side of the head unit 120 is connected to the oil supply unit The oil flows in the order of the cap 128a on the upper side of the head casing 121 and the bearing 127 on the upper side and the upper side of the rotor 123 on the upper side of the head casing 121. Conversely, When the lower part of the head part 120 is placed adjacent to the oil supply unit 400, the cap 128b provided at the lower-> lower end of the head casing 121, the bearing 127, The oil can flow in the order of the lower side of FIG. At this time, the oil may be introduced into fine cavities generated inside the respective components of the head part 120 or in combination with other components.

6A to 6C are diagrams for explaining the connection unit 300 among the components of the handpiece system using the dental suction apparatus according to the embodiment of the present invention. Hereinafter, the connection unit 300 among the components of the handpiece system will be described with reference to FIGS. 6A to 6C.

The connection unit 300 according to the present embodiment is configured such that a plurality of paths through which the air or oil is delivered to the handpiece 100 are formed, The suction unit 200 is operated so that the oil is supplied through the head unit 120 or the oil is supplied to the suction unit 200 when the suction unit 200 is operated only. The turbo function of improving the driving force of the handpiece 100 is performed and the suction unit 200 is supplied to the handpiece 100 even when the suction unit 200 is not operated, The air discharged through the exhaust pipe 113 can be discharged to the outside via the head part 120. [

The connection unit 300 may further include a third path pipe 330 and a path branch pipe 340 in addition to the first path pipe 310 and the second path pipe 320 described above .

The third path pipe 330 is provided at one end with an exhaust port for discharging the internal air of the handpiece 100 to the outside.

The path branch pipe 340 is connected individually to the first path pipe 310, the second path pipe 320 and the third path pipe 330 so that the oil or the air And the internal air of the handpiece 100 is transported only by the selected route.

The path branch pipe 340 has a first terminal connected to the first path tube 310, a second terminal connected to the second path tube 320, a third terminal connected to the third path tube 330, And a first valve 341a and a third valve 343a may be provided on the first and third terminals to determine whether to open or close the path, respectively.

Specifically, when the suction unit 200 is operated, the path branch pipe 340 opens the first valve 341a, closes the third valve 343a, and operates the suction unit 200 The suction unit 200 is operated so that the air passing through the head part 120 is sucked into the suction unit 200 through the exhaust pipe 113 or the oil is introduced through the head part 120, The first valve 341a is closed and the third valve 343a is opened so that the air passed through the head part 120 passes through the third path tube 330, So that it can be discharged to the outside.

FIG. 7 is a view illustrating the oil supply unit among the components of the handpiece system using the dental suction device according to an embodiment of the present invention in more detail. Hereinafter, the oil supply unit 400 among the components of the present handpiece system will be described in more detail with reference to FIG.

The oil supply unit 400 may include an oil receiving unit 410 for receiving oil therein. The oil receiving unit 410 includes a mounting member 411 for mounting the head unit 120 The oil accommodated in the head portion 120 may be introduced into the head portion 120 through the upper side or the lower side of the head portion 120 in a state where the head portion 120 is mounted. At this time, it is preferable that the oil receiving portion is formed so as to receive the amount of oil of about 2 to 3 drops, and is formed so as not to be difficult to mount on the upper side or the lower side of the head portion 120.

In addition, since the oil supply unit 400 is formed of a transparent material, the process of supplying the colored oil to the head unit 120 can be visually confirmed, thereby providing convenience to the user.

8 is a view for explaining the oil supply unit according to another embodiment of the present invention in more detail.

The oil supply unit 400 according to the present embodiment includes a cap unit 420 that is implemented as a container type and includes an oil receiving unit 410 and a cap unit 420 mounted to cover the upper end of the oil receiving unit 410, And an oil cup 430 and a compression spring 440 positioned between the oil receiving portion 410 and the cap portion 420 may be additionally provided.

The cap portion 420 is provided with a pressing pin 421 at the lower center of the cap portion 420 and can push the oil cup 430 downward through the pressing pin 421 when the cap portion 420 is mounted on the upper end of the oil receiving portion 410.

The oil cup 430 is positioned such that the oil receiving portion 410 located at the lower end of the oil supply unit 400 is located on the upper side while the cap portion 420 is mounted on the oil receiving portion 410, An oil inflow groove 431 for allowing a predetermined amount of oil contained in the oil accommodated in the oil accommodating portion 410 to flow into the oil accommodating portion 410, Even if the positions of the oil accommodating portion 410 and the cap portion 420 are restored, the oil accommodating groove 433 (not shown) is formed so that a part of the accommodated oil is not discharged to the oil accommodating portion 410 located below, May be provided.

The compression spring is provided at the lower end of the oil cup 430. When the cap portion 420 is separated from the oil receiving portion 410, the oil cup 430 is pushed downward by the pressing pin 421, 430) can be restored to the home position.

When the cap part 420 is removed and the oil cup 430 is returned to its original position, the head part 120 is received in the oil cup 430 restored to its original position, It is possible to supply the oil to the inside of the handpiece 100 easily and conveniently and to prevent the oil from being excessively introduced into the head part 120 can do.

Also in this oil supply unit 400, since the oil receiving portion and the oil cup 430 are formed of a transparent material, the process of supplying the colored oil to the head portion 120 can be visually confirmed, can do.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

100: Handpiece 110: Body part
111: air supply pipe 113: exhaust pipe
115: Cooling water supply pipe 117: Air supply pipe for supplying cooling water
120: head part 121: head casing
123: rotor 125: chamber
127: bearing 128: cap < RTI ID = 0.0 >
130: bar
200: suction unit 210: air compressors
220: Suction pipe 300: Connection unit
310: first path tube 320: second path tube
330: Third path tube 340: Path tube tube
341a: first valve 343a: third valve
400: oil supply unit 410: oil receiving portion
411: mounting member 420: cap part
421: push pin 430: oil cup
431: Oil inflow groove 433: Oil receiving groove
440: Compression spring

Claims (8)

An air supply pipe for supplying air to the head portion and an exhaust pipe for discharging air passed through the head portion when the rotor rotates are formed in the head portion having a rotor inside and a driving force for rotating the rotor, A handpiece including a body part provided;
A suction unit including a suction pipe and a suction tip; And
A connecting unit connected to one end of the suction pipe or the suction tip and connected to the exhaust pipe so that the suction air is sucked into the suction unit through the exhaust pipe when the suction unit operates; / RTI >
And an oil supply unit for allowing the oil contained in the inside of the handpiece to be introduced through the head unit when air is sucked by the suction unit in a state where the head unit of the handpiece is accommodated, and,
The handpiece includes:
When the suction unit is operated and the internal air is discharged to the suction unit, the internal air pressure is lowered so that the oil is introduced through the head unit
The oil supply unit includes:
An oil receiving portion for receiving oil therein;
A cap portion mounted to cover the upper end of the oil receiving portion; And
The oil accommodating portion may be positioned on the upper side while the cap accommodating portion is mounted on the oil accommodating portion so that the oil accommodating portion is positioned on the upper side and the cap portion is positioned on the lower side, And the oil introduced through the oil inflow groove is received. Even if the position of the oil accommodating portion and the cap portion is restored, a part of the accommodated oil is not discharged to the oil accommodating portion located at the lower side, And an oil cup provided with an oil receiving groove for maintaining the accommodated state,
The cap unit includes:
And a push pin provided at a central lower end to push the oil cup downward when mounted on an upper end of the oil accommodating portion
The oil supply unit includes:
And a compression spring which is provided at a lower end of the oil cup and restores the oil cup in a state in which the oil cup is pushed downward by the push pin when the cap part is separated from the oil accommodation part. Handpiece system using suction device. delete The method according to claim 1,
Wherein:
A bearing provided on the upper and lower ends of the rotor for supporting and rotating the shaft of the rotor; And
And a cap provided on the upper side of the bearing provided at the upper end of the rotor and the lower side of the bearing provided at the lower end of the rotor,
Wherein:
Wherein when the suction unit is operated in a state that the oil supply unit is stationary, the oil flows into a space between the cap and the bearing. The method according to claim 1,
The oil supply unit includes:
Characterized in that it is made of a transparent material so that the suction of the oil and the degree of suction (degree) of the oil can be visually confirmed. delete The method according to claim 1,
The connecting unit includes:
When the handpiece and the suction unit are operated, the air passed through the head unit is sucked into the suction unit through the exhaust pipe by the operation of the suction unit, So as to improve the driving force of the dental suction device. 7. The method according to claim 1 or 6,
The connecting unit includes:
Wherein a predetermined path is selected among the plurality of paths depending on whether the suction unit is operated or not, and the inner path of the handpiece is formed along the selected specific path, Wherein the oil or the oil is transferred to the air or the oil. 8. The method of claim 7,
The connecting unit includes:
A first path tube having one end connected to the suction pipe or the suction tip;
A second path tube having one end connected to the exhaust pipe;
A third path tube having an exhaust port at one end thereof for allowing the air inside the handpiece to discharge air to the outside; And
And a path branching unit connected to the other ends of the first, second, and third path tubes to select a specific one of the plurality of paths,
Wherein the path branching means comprises:
A first valve and a third valve for controlling whether the path is opened or closed are provided at first and third terminals individually connected to the first path tube and the third path tube, The first valve is opened and the third valve is closed so that the air passed through the head portion is sucked into the suction unit through the exhaust pipe by the operating suction unit or the oil is sucked through the head unit, Respectively,
When the suction unit is not operated and only the handpiece is operated, the first valve is closed and the third valve is opened so that the air passed through the head portion is discharged to the outside through the third path tube Wherein the dental suction device comprises:

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