KR101955327B1 - Pneumatic dental handpiece - Google Patents

Abstract

The present invention relates to a handpiece. More specifically, the present invention relates to a handpiece capable of regulating air pressure supplied to a head part. The handpiece used for dental treatment or dentistry, of the present invention, further has a coupling adapter embedded in a body part of the handpiece and fastened to a coupling part, to deliver compressed air and supply water to the head part. The coupling adapter further has an air pressure regulating part having a discharge hole connected to an air supply passage and, when the pressure of the air supplied through an air supply pipe is a set pressure or higher, the air pressure regulating part opens the discharge hole to enable the air pressure supplied through the air supply pipe to be maintained at a predetermined pressure or lower.

Description

[0001] Pneumatic dental handpiece [0002]

The present invention relates to a handpiece, and more particularly, to a dental handpiece capable of adjusting air pressure supplied to a head.

A handpiece used for dental treatment or treatment is usually rotatably driven by compressed air and has an air turbine or an air motor to utilize air pressure.

Fig. 1 shows an example of a conventional dental handpiece driven by air pressure. 1 is a cross-sectional view of a head portion of a conventional dental handpiece, which includes a verse sleeve 12 for receiving and releasably holding a dental treatment instrument 11 such as a drill or grinding tool, Which are supplied to the upper side and the lower side of the rotor 13 for rotatably supporting the rotor 13 and the burst sleeve 12 supplied on the burst sleeve 12 to rotatably drive the rotor 12, And a ball bearing 14.

These parts are all accommodated in the cartridge case 15, and the cartridge case 15 is also housed in the head housing 16. The head housing jacket 17 for supporting the head housing 16 includes therein an air supply passage 18a for supplying compressed air to the rotor 13 in the rotor 13 and an air supply passage 18a for supplying compressed air supplied to the rotor 13 And an exhaust passage 18b for exhausting the exhaust gas.

When the above-mentioned air turbine type dental handpiece is operated with air pressure exceeding the predetermined range set for each handpiece, the rotation speed of the turbine becomes too high, and the dental treatment instrument may be damaged. Also, the lubricant may be exhausted prematurely, causing wear of the bearing and shortening its service life.

In order to avoid such a problem, the dental unit for supplying compressed air to the handpiece has a function of adjusting the pressure of the compressed air supplied to the handpiece so as to keep the air pressure in the handpiece supply passage within a predetermined range.

However, since it is cumbersome and complicated to adjust the air pressure in the dental unit, the user is likely to cause the above-described problems while driving the handpiece with the same air pressure without adjusting the air pressure despite using other types of handpieces.

Japanese Patent Laid-Open No. 2003-019144 discloses a dental handpiece having a pressure-sensitive member. The prior art dental handpiece has a pressure-reducing member arranged in a coupling (connection member) which is connected to the handpiece body portion or to the base end portion of the handpiece body portion. Fig. 2 shows a dental handpiece 20 of the Japanese prior art.

The dental handpiece 20 includes a grip portion 21 and a head portion 22 supplied to the distal end portion of the grip portion 21. [ The head portion 22 accommodates and rotatably supports a burst sleeve (not shown) for receiving the dental treatment instrument 23. The grip portion 21 accommodates the air supply line 24, the exhaust passage 25 and the water supply line 26 and the decompression member D is disposed at an intermediate portion of the air supply line 24. A flexible tube (not shown) extending from the dental unit for supplying compressed air is connected to the base end of the grip portion 21 so that compressed air is supplied to the head portion 22 through the air supply tube 24, (23) is rotatably driven.

In the dental handpiece 20 described above, when the pressure of the compressed air supplied from the dental unit exceeds the aptitude range, the compressed air is discharged from the inside of the air supply duct 24 through the decompression member D to the exhaust passage 25 ), The air pressure is automatically adjusted.

However, according to the prior art, there is a problem that the usability of the user is not excellent and the satisfaction of use is low because the user can not adjust the air pressure with the pressure desired by the user.

Japanese Patent Laid-Open No. 2003-019144: A dental handpiece having a pressure-reducing member Korean Patent No. 10-1167208: Dental handpiece with a pressure regulating device

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a coupling adapter incorporated in a body part of a handpiece and coupled with a coupling, The present invention provides a dental handpiece capable of adjusting the air pressure to be able to be adjusted according to the size of the dental handpiece.

In order to accomplish the above object, the present invention provides a dental treatment apparatus comprising: a head including a tool used for dental treatment or medical treatment; a body extending from the head and adapted to be held by a user; The handpiece includes a coupling part for supplying air and a supply water or a power supply. The handpiece is installed inside the body part, and is connected to the coupling part to deliver compressed air and water supplied from the coupling part to the head part Wherein the coupling adapter further comprises a coupling coupling part for coupling the coupling part to the rear end of the coupling adapter, and a coupling part for coupling the coupling part to the coupling part, A water supply pipe connection part connected to the head part and connected to a water supply pipe for supplying water to be supplied, And an exhaust unit formed to drive the air motor to drive the air motor and exhaust air exhausted from the head unit to be exhausted through the coupling, wherein the coupling adapter includes an air supply passage When the air pressure of the air supplied through the air supply tube is equal to or higher than a predetermined pressure, the air supply opening through the air supply opening to maintain the air pressure supplied through the air supply tube at a predetermined pressure or lower And an air pressure regulator.

Wherein the air pressure regulating portion includes a guide body formed in a front of the discharge hole and having a guide groove extending a predetermined length along the longitudinal direction, and a guide body provided movably in the guide body and having a front end inserted in the discharge hole, A fixing member fixed to one side of the guide main body, and a fixing member having one end supported by the fixing member and the other end supported by the opening / closing member so as to elastically support the opening / closing member in a direction closing the discharge hole It is preferable to include an elastic member.

Preferably, the fixing member is movable in a predetermined length along the guide groove of the guide body, and is configured to adjust the fixing position of the fixing member.

Wherein the fixing member is formed with a fixing hole at one side thereof and the guide body is formed with a plurality of fixing holes spaced apart from each other in the longitudinal direction by a predetermined distance and inserted into the fixing hole of the fixing member through the fixing hole, And a fixing pin for fixing the fixing member to one side of the hollow body.

The guide body may be detachably attached to one side of the coupling adapter.

The air pressure controllable dental handpiece according to the present invention has an advantage in that it can increase the satisfaction of the user and increase the service life of the handpiece because the air pressure can be adjusted according to the user's need.

1 is a sectional view showing a head portion of a conventional handpiece,
2 is a cross-sectional view of one embodiment of a bell-low pressure type handpiece,
3 is a perspective view of an embodiment of a dental handpiece capable of adjusting air pressure according to the present invention,
FIG. 4 is a perspective view illustrating the coupling adapter of FIG. 3,
Figure 5 is a side view of the coupling adapter of Figure 3,
Fig. 6 is a perspective view of the coupling adapter of Fig. 3,
7 is a perspective view of another embodiment of a coupling adapter;

Hereinafter, a dental handpiece capable of adjusting air pressure according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention in order to clarify the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

3 to 6, the dental handpiece 100 according to the present invention can adjust the air pressure so that the air pressure acting on the tool of the head 110 can be maintained at a predetermined pressure or less. And includes a head 110 and a body 120, a coupling 130, and a coupling adapter 200 installed inside the body 120.

The head portion 110 is configured to be mounted with a dental tool such as a drill or burr for dental treatment or medical treatment. The coupling portion 130 connects the dental care unit and the handpiece 100, Connect the water supply.

The body part 120 connects the coupling part 130 and the head part 110 and can be grasped by the user. The coupling part 130 can be connected to the coupling part 130, An internal space is formed in which an internal space can be built.

The body part 120 may be formed such that the head part 110 and the coupling part 130 are connected to each other in a straight line or may be formed in a shape where one side is bent to form a predetermined angle. The body 120 may be formed in various lengths and shapes depending on the purpose of the treatment, the treatment, and the location of the method.

A water supply pipe 150 and a water supply pipe 140 for connecting the coupling adapter 200 and the head unit 110 are installed in the body 120 so that compressed air and supply The water can be transmitted to the head 110 side.

In the present embodiment, in addition to a water supply pipe 140 for supplying compressed air and a water supply pipe 150 for supplying water to drive the tool of the head unit 110, An auxiliary air intake port 160 for injecting air is provided. A light guide member 170 is also provided to transmit light to illuminate light emitted from a lamp (not shown) provided in the coupling adapter 200 through the head unit 110. Such a configuration is the same as that of a conventional handpiece and may have various shapes and configurations according to the needs of the user.

The coupling adapter 200 is embedded in the body part 120 and is coupled to the coupling part 130. The coupling adapter 200 is coupled to the coupling part 130 at a rear end thereof, (Not shown).

The coupling adapter 200 is connected to the front portion of the coupling adapter 200 such that the air supply pipe 140, the water supply pipe 150 and the auxiliary air supply pipe 160 are fastened to each other. A light guide member 240 and a light guide member connection portion 250 are formed.

In addition, at one side of the coupling adapter 200, an exhaust part 260 through which the compressed air supplied to the head part 110 can be discharged is formed. The compressed air that has been supplied to the inside of the head unit 110 through the air supply unit 140 is discharged after being used for operating the tool. The compressed air, which is supplied to the body unit 120 through the exhaust hole formed in the head unit 110, As shown in FIG. The air discharged into the body part 120 may be discharged to the outside of the handpiece 100 through the exhaust part 260 of the coupling adapter 200.

The coupling adapter 200 is provided with an air pressure regulator 300 to prevent the supply of air with a pressure higher than the set air pressure.

The air pressure regulator 300 is for opening and closing the discharge hole 270 formed at one side of the coupling adapter 200 to maintain the pressure of air supplied to a certain pressure or lower.

The discharge hole 270 is formed at one side of the coupling adapter 200 and is connected to an air supply passage formed inside the coupling adapter 200 to transfer the compressed air to the air supply tube connection part 220. Therefore, the compressed air moving through the air supply passage may be supplied to the outside of the coupling adapter 200 through the discharge hole 270 while being supplied to the air supply tube 140 through the air supply tube connecting portion 220.

The air pressure regulator 300 regulates the air pressure of the compressed air supplied through the supply hole by opening and closing the discharge hole 270. The air pressure regulator 300 includes a guide body 310 installed in front of the discharge hole 270, An opening and closing member 350 which is installed in the main body 310 so as to be able to move forward and backward and which opens and closes the discharge hole 270 and a fixing member 320 and an opening and closing member 350 which are fixed to one side of the guide body 310, And an elastic member 340 provided between the member 320 and elastically supporting the opening and closing member 350 in a direction blocking the discharge hole 270.

The guide body 310 has a guide groove 311 formed in the front of the discharge hole 270 and extending in the longitudinal direction. The guide groove 311 guides the moving direction in which the opening and closing member 350 and the fixing member 320 move in the longitudinal direction. The guide hole 311 is formed with a plurality of fastening holes 312 spaced along the longitudinal direction of the guide groove 311. The fastening holes 312 are formed in the guide groove 311, Respectively. Although four fastening holes 312 are shown in the present embodiment, the number and spacing of the fastening holes 312 may be variously set as needed.

The opening and closing member 350 is formed to be able to move along the guide groove 311 in the guide body 310 and to block the discharge hole 270 as described above. The opening and closing member 350 is formed to have a conical shape gradually increasing in diameter as it extends from the front end toward the rear end toward the discharge hole 270. The rear end of the opening and closing member 350 corresponds to the inner diameter of the guide groove 311 And a body portion is formed. An extension portion extending a predetermined length rearward from the rear end of the body portion is formed, and the extension portion is formed to have a smaller outer diameter than the body portion.

The fixing member 320 is fixed to the rear portion of the guide body 310 so that the opening and closing member 350 can be elastically supported by the elastic member 340.

The fixing member 320 is formed in a cylindrical shape corresponding to the inner diameter of the guide groove 311 and has a fixing hole 321 formed on one side thereof. The fixing member 320 is inserted into the fixing hole 321 through the fixing hole 312 so that the fixing member 320 can be fixed in position. The shape and size of the fixing member 320 may be different from the shape and size of the guide body 310 and the guide groove 311 in the present embodiment, Shape, and size of the substrate.

One end of the elastic member 340 is supported by the fixing member 320 and the other end is supported by the opening and closing member 350. In this embodiment, a compression spring is applied. The other end of the elastic member 340 is fastened so that the extension of the opening and closing member 350 is inserted therein. The fastening member 320 may also be formed with a protrusion that is inserted into a predetermined length inside one end of the elastic spring.

The elastic member 340 urges the opening and closing member 350 toward the discharge hole 270 so that the discharge hole 270 is elastically supported by the opening and closing member 350 to be in a closed state. When the pressure of the air becomes larger than the elastic force of the elastic member 340, the elastic member 340 is compressed by the air pressure to be discharged through the discharge hole 270 so that the opening and closing member 350 retracts, Lt; / RTI > A part of the compressed air inside the coupling adapter 200 is discharged to the outside of the coupling adapter 200 through the discharge hole 270 and the pressure of the compressed air supplied through the air supply pipe 140 is lowered to a certain level Lt; / RTI >

Further, by adjusting the fixing position of the fixing member 320, the set value of the air pressure can be adjusted. That is, when the fixing member 320 is moved and fixed in the direction of approaching the discharge hole 270, the magnitude of the elastic force by the elastic member 340 increases, so that the magnitude of the air pressure supplied through the air supply tube 140 becomes large . On the contrary, when the fixing member 320 is moved and fixed in the direction away from the discharge hole 270, the elastic force by the elastic member 340 is reduced, so that compressed air can be discharged through the discharge hole 270 even at a small air pressure The pressure of the air supplied through the air supply pipe 140 can be maintained at a low level.

Accordingly, the user can set the position of the fixing member 320 in advance in accordance with the treatment or the therapeutic purpose or the user's tendency to be used, so that the magnitude of the air pressure supplied to the head unit 110 can be kept below a certain level.

7 shows another embodiment of the air pressure regulator 300. In this embodiment, the guide body 310 is formed to be detachably coupled to one side of the body of the coupling adapter 200. [ In the present embodiment, guide bodies 310 having different numbers or spacing intervals may be selectively attached to the coupling holes 200 and the guide body 310 may be integrally formed with the coupling adapter 200 Mechanical machining can be made easier than it is.

In addition, when the guide body 310 is integrally formed with the coupling adapter 200, the guide body 310 must be formed of the same material as the coplanar adapter. However, as in the present embodiment, The guide body 310 may be formed of a material that is comparatively easy to mold, such as plastic, or a variety of molding methods such as die casting and casting may be applied even when the guide body 310 is made of a metal material.

In the dental handpiece 100 according to the present invention described above, the discharge hole 270 through which the compressed air to be supplied through the coupling damascene air supply unit 140 can be discharged is formed, When air pressure is applied to the air pressure regulating unit 300 including the opening and closing member 350 that opens and closes the discharge hole 270 by the elastic member 340 at a predetermined pressure or more, the discharge hole 270 is opened, The air pressure of the compressed air supplied to the head portion 110 can be maintained at a predetermined level or less by discharging the air to the outside of the ring adapter 200. In particular, since the size of the air pressure to which the compressed air is discharged can be adjusted by adjusting the fixing position of the fixing member 320, the user can select the size of the air pressure acting on the head 110 according to his or her needs, It rises remarkably.

The description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features presented herein.

100: Dental handpiece with adjustable air pressure
110: head part 120:
130: coupling portion 140:
150: water pipe 160: auxiliary water pipe
170: light guiding member
200: Coupling adapter
210: coupling coupling part 220:
230: water pipe connection part 240: auxiliary water pipe connection part
250: light guide member connection part 260: exhaust part
270: discharge hole
300: air pressure regulator
310: guide body 311: guide groove
312: fastening hole 320: fastening member
321: Fixing hole 330: Fixing pin
340: elastic member 350: opening / closing member

Claims (5)

A body portion extending from the head portion and capable of being held by a user, and a body portion connected to a rear end of the body portion to supply compressed air and a supply water or a power source In a handpiece including a coupling portion,
And a coupling adapter which is embedded in the body and is coupled to the coupling part to transmit the compressed air and the supply water transmitted from the coupling part to the head part,
Wherein the coupling adapter has a coupling portion for coupling with the coupling portion at a rear end thereof, a coupling portion for coupling the coupling portion to the head portion, And an exhaust pipe connected to the water pipe for connecting the water pipe to the water pipe. The exhaust pipe is connected to the water pipe, and the exhaust air discharged from the head unit after the air motor is driven to drive the tool, However,
Wherein the coupling adapter is formed with a discharge hole connected to an air supply passage communicating with the air supply tube connection portion, and when the air pressure of the air supplied through the air supply tube is equal to or higher than a set pressure, Further comprising an air pressure regulator for maintaining the pressure of the air supplied through the air inlet at a predetermined pressure or less.
The method according to claim 1,
Wherein the air pressure regulating portion includes a guide body formed with a guide groove extending a predetermined length along the longitudinal direction in front of the discharge hole,
An opening / closing member provided in the guide body so as to be movable forward and backward and having a front end fitted in the discharge hole to open / close the discharge hole,
A fixing member fixed to one side of the guide body,
And an elastic member having one end supported by the fixing member and the other end supported by the opening and closing member to elastically support the opening and closing member in a direction to close the discharge hole.
3. The method of claim 2,
The fixing member is movable a predetermined length along the guide groove of the guide body,
Wherein the fixing member is configured to adjust a fixing position of the fixing member.
The method of claim 3,
The fixing member has a fixing hole formed at one side thereof,
The guide body is formed with a plurality of fastening holes spaced apart from each other along the longitudinal direction,
Further comprising a fixing pin inserted into the fixing hole of the fixing member through the coupling hole to fix the fixing member to one side of the main body of the dental appliance.
5. The method of claim 4,
Wherein the guide body is detachably attached to one side of the coupling adapter.

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