KR101424760B1 - Handpiece - Google Patents

Abstract

Disclosed is a hand piece that is configured to inject a high-pressure fluid and is capable of adjusting a high-pressure fluid injection amount. The disclosed hand piece includes: a head unit that has an injection nozzle which is capable of injecting a fluid at a high pressure; and a switching unit that is capable of adjusting a flow rate of the fluid which is supplied to the head unit. The switching unit includes: a switch body where a roller receiving groove is formed on one side of an outer circumferential surface; a fluid tube that is connected to the head unit through the roller receiving groove so as to supply the fluid to the injection nozzle and is formed of an elastic material; a roller that is received in the roller receiving groove and pressurizes the fluid tube to close the fluid tube when an external force is applied; and a dial that surrounds the switch body and has a roller contact portion formed at a part of an inner circumferential surface for contact with the roller. When the dial is displaced in angle from the switch body, the point of contact with the roller in the roller contact portion is changed, and the external force applied to the roller and a pressurizing force at which the roller pressurizes the fluid tube are changed.

Description

Handpiece {Handpiece}

The present invention relates to a handpiece used for elaborate manual work in the fields of, for example, dental surgery, dental treatment, skin treatment and the like.

In the fields of dental surgery, dental treatment, skin treatment, etc., elaborate manual work is required, and various types of handpieces are used for various fields. Typically, the handpiece has a configuration for rotating a cutting or polishing tool at high speed or irradiating a laser. However, depending on the type of work to be performed using the handpiece, in addition to the handpiece, a means for injecting high-pressure air or water may be additionally required. In addition, There is also a case where only the means to do is required.

On the other hand, some handpieces having means for injecting fluids such as high-pressure air or water have been disclosed. However, all of them have a function of spraying or stopping fluid, that is, a function of ON / OFF And it is inconvenient because there is a lot of force in the on / off operation.

The present invention provides a handpiece having a configuration for injecting a high-pressure fluid and having a configuration capable of controlling the injection amount of a high-pressure fluid.

The present invention provides a head unit including a head unit having an injection nozzle capable of injecting a fluid at a high pressure and a switching unit capable of controlling a flow rate of a fluid supplied to the head unit, The unit includes a switch body having a roller seating groove on one side of the outer circumference, a fluid tube connected to the head unit through the roller seating groove for supplying fluid to the spray nozzle, A roller that is seated in the roller seating groove and presses the fluid tube in a direction of closing the fluid tube when an external force is applied, and a roller contact portion that is in contact with the roller at a portion of the inner circumferential surface Wherein when the dial is displaced angularly about the switch body, the roller contacts the roller in the roller contact portion, The contact point is changed so that an external force applied to the roller and a pressing force for pressing the roller against the fluid tube are changed.

The fluid tube may be made of silicone resin.

The plurality of fluid tubes may be provided to supply different fluids.

The roller contact portion may include an inclined groove portion that is formed in a deeper manner as it extends in the circular arc direction of the inner circumferential surface.

The roller contact portion may include a first roller mounting groove portion that is curved so that the roller can be seated without exerting an external force on the roller when facing the roller.

The roller contact portion may include a second roller mounting groove portion bent to apply an external force to the roller so as to close the fluid tube when the roller faces the roller and to allow the roller to be seated.

The handpiece of the present invention may further comprise means for fixing the working tool to one side and rotating the working tool at a high speed.

The handpiece of the present invention may further comprise means for projecting working light (light) to the outside.

According to the present invention, a high-pressure fluid such as water or air can be injected through the handpiece. Further, the flow rate can be easily adjusted by operating the switch with respect to the center of the handpiece, and the reliability of the flow rate adjustment function is high.

1 is a side view of a handpiece according to an embodiment of the present invention.
Fig. 2 and Fig. 3 are exploded perspective views of the front part of the handpiece of Fig. 1, viewed from different sides.
Fig. 4 is an enlarged perspective view of the dial of Fig. 3;
FIGS. 5 to 7 are cross-sectional views taken along line BB of FIG. 1, illustrating the process of rotating the dial of FIG. 4 to adjust the flow rate of the fluid.

Hereinafter, a handpiece according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The terminology used herein is a term used to properly express the preferred embodiment of the present invention, which may vary depending on the intention of the user or operator or the custom in the field to which the present invention belongs. Therefore, the definitions of these terms should be based on the contents throughout this specification.

FIG. 1 is a side view of a handpiece according to an embodiment of the present invention, FIGS. 2 and 3 are exploded perspective views of a front part of the handpiece of FIG. 1, An enlarged view is a perspective view. Referring to FIG. 1, the handpiece 10 according to the embodiment of the present invention has a cylindrical bar shape extending in one direction, and is used for dental pore work. The handpiece 10 has means for fixing the workpiece 2 in front and for rotating the tool 2 at a high speed. A cutting or polishing operation can be performed using the handpiece 10 according to the shape of the replaceable tool 2. [

The handpiece 10 has a head unit 20, a switching unit 45 (see Fig. 2), a center cover 11, and a rear cover 13 from the front. The rear cover 13 is provided with a drive air inlet pipe 15 into which compressed air for high speed rotation of the tool 2 flows and an air inlet pipe 15 into which the tool 2 is rotated at a high speed And a drive air outlet pipe 16 for discharging the compressed air to the outside of the handpiece 10 is provided. The pipes 15 and 16 may each be connected to an air compressor (not shown). The rear cover 13 is provided with a distributor inlet pipe 17 through which water sprayed from the head unit 20 flows and a distributing air inlet pipe 18 through which compressed air injected from the head unit 20 flows .

2 and 3, the head unit 20 includes a head housing 24 and a front cover 21 surrounding the head housing 24. The turbine 42 is supported by the first and second bearings 39 and 40 and is rotatably inserted and mounted in the head housing 24 with a rearwardly open turbine seating groove 25 formed therein. The tool chuck 36 is disposed in front of the first bearing 39 and is coaxially connected to the rotational axis of the turbine 42. The tool 2 can be inserted into the head housing 24 and fixed by the tool chuck 36 through the tool attachment and detachment opening 34 formed in the front of the head housing 24, The tool 2 rotates at high speed as the compressed air that has flowed forward to the handpiece 10 through the turbine 42 (see FIG. 1) rotates the turbine 42 at a high speed. The compressed air that has rotated the turbine 42 moves to the rear of the handpiece 10 and flows out through the driving air outlet pipe 16.

An air injection nozzle 31 in which air is injected at a high pressure and a water injection nozzle 32 in which water is injected at a high pressure are provided around the tool attachment and detachment opening 34 of the head housing 24, First and second guide pipes 27 and 28 connected to the air injection nozzle 31 and the water injection nozzle 32 so as to be fluidly connected are inserted into the rear of the air injection nozzle 31 and the water injection nozzle 32, respectively.

A switching unit 45 regulates the flow rates of fluids, that is, air and water, supplied to the head unit 20 so that they can be injected through the nozzles 31 and 32. The switching unit 45 has a switch body 55, a distributing air tube 57 and a dispensing tube 58, a roller 67 and a dial 46.

The switch body 55 is a cylindrical member and includes a driving air inlet hole 61 and a driving air outlet hole 62 penetrating the inside in the longitudinal direction, The head housing receiving portion 60 is provided so as to be able to be fitted and engaged with the head housing receiving portion 60. The driving air inlet pipe 15 (see FIG. 1) at the rear of the handpiece 10 guides the high pressure air through the driving air inlet hole 61 to the turbine 25 inside the head housing 24. The high pressure air having rotated the turbine 25 moves rearward of the handpiece 10 through the driving air outlet hole 62 and is discharged to the outside through the driving air outlet pipe 16 (see FIG. 1). Or the driving air outlet pipe 16 extends to the inside of the head housing 24 through the driving air outlet hole 62 to induce the high pressure air rotating the turbine 25 to the outside of the handpiece 10 You may. On the other hand, a roller seating groove 65 is formed on one side of the outer circumferential surface of the switch body 55.

A pair of fluid tubes 57 and 58 serving as a pair of fluid tubes provided inside the handpiece 10 are connected to the air inlet pipe 18 for one minute (See FIG. 1), and the front ends thereof are fluidly connected to the first guide pipe 27 and the second guide pipe 28, respectively. The minute use air tube 57 and the dispensing water tube 58 penetrate the switch body 55 in the longitudinal direction of the handpiece 10 and in particular through the roller seat groove 65. When the external force is applied, the flow path is closed, and when the external force is released, the elasticity restored and the flow path is opened again. For example, the material of the pair of tubes 57 and 58 may be a silicone resin having high elastic restoring force and harmless to the human body.

The roller 67 is a cylindrical member and is seated in the roller seating groove 65 so that the rotational axis of the roller is parallel to the longitudinal extension of the handpiece 10. The roller 67 protrudes slightly in the radial direction than the outer circumferential boundary of the switch body 55 because the roller 67 is accommodated on the pair of fluid tubes 57 and 58 in the roller seat groove 65. [ When an external force is applied to the roller 67 in the direction toward the center of the switch body 55, the roller 67 moves toward the center of the switch body 55 and presses the pair of fluid tubes 57, The flow path of the fluid tubes 57 and 58 becomes narrow (refer to Fig. 6), and the flow of the fluid tubes 57 and 58 becomes fully closed when the external force becomes wider (see Fig. 7).

The dial 46 is a ring-shaped member enclosing the switch body 55. Referring to Figs. 2 to 4, the dial 46 is formed with a roller contact portion 50 which is in contact with a roller 67 on a part of the inner circumferential surface 48 thereof. The roller contact portion 50 is in the form of a groove or a groove which is widened from the inner circumferential surface 48 of the dial 46 to the outer circumferential surface side and has an inclined groove portion 53, a first roller mounting groove portion 51, (52).

The inclined groove 53 extends in the circular arc direction of the inner peripheral surface 48 and is formed so as to be inclined deeper as it extends in the arc direction. The first roller engaging groove portion 51 is formed to be connected to one side end portion deeper out of the end portions on both sides of the inclined groove portion 53 and is connected to a roller 67 protruding outward beyond the outer circumferential boundary of the switch body 55 And is formed so as to be bent so that a portion thereof can be seated. The second roller engaging groove 52 is formed to be connected to the other end of the inclined groove 53 which is shallower than the other end of the inclined groove 53, And is formed so as to be bent so that a portion thereof can be seated.

FIGS. 5 to 7 are cross-sectional views taken along line B-B of FIG. 1, illustrating the process of rotating the dial of FIG. 4 to adjust the flow rate of the fluid. 1 and 5 to 7, when the dial 46 is angularly displaced about the switch body 55, the handpiece 10 rotates in the roller contact portion 50, The point of contact with the pair of fluid tubes 67 and 58 is changed so that the external force applied to the roller 67 and the pressing force of the roller 67 to press the pair of fluid tubes 57 and 58 are changed. The operator of the handpiece 10 can hold the dial 46 with his or her fingers and twist about the center cover 11 to change the angle of the dial 46 about the switch body 55.

5, when the roller 67 is seated in the first roller mounting groove portion 51 and the first roller mounting groove portion 51 and the roller 67 are opposed to each other, No external force is applied to the roller 67 by the roller 51 and the pair of fluid tubes 57 and 58 are not pressed by the roller 67. [ That is, the pressing force by which the roller 67 presses the pair of fluid tubes 57 and 58 is zero. At this time, the atomizing air and the water that have flowed into the handpiece 10 pass through the pair of fluid tubes 57 and 58 and pass through the pair of spray nozzles 31 and 32 (see FIG. 2) (10).

On the other hand, when the operator changes the angle of the dial 46 counterclockwise on the basis of FIGS. 5 to 7, the roller 67 is disengaged from the first roller mounting groove portion 51 as shown in FIG. 6, 53). An external force is applied to the roller 67 facing the inclined groove 53 in the direction toward the center of the switch body 55 and the pair of fluid tubes 57 and 58 is pressed and crushed. The roller 67 is moved to the pair of fluid tubes 57 and 58 as the point at which the roller 67 and the inclined groove 53 face each other is moved from the first roller mounting groove portion 51 to the second roller mounting groove portion 52, So that the pair of fluid tubes 57 and 58 are further distorted and the flow path is gradually narrowed.

When the operator rotates the dial 46 further in the counterclockwise direction and the roller 67 is seated against the second roller mounting groove 52 as shown in Fig. 7, An external force applied to the roller 67 by the roller 52 and a pressing force for pressing the pair of fluid tubes 57 and 58 by the roller 67 are maximized, Is closed. On the other hand, when the operator changes the angle of the dial 46 in the opposite direction, that is, in the clockwise direction, with the pair of fluid tubes 57, 58 closed, the flow path of the pair of fluid tubes 57, Lt; / RTI > In this manner, the operator can adjust the flow rate of the fluid injected through the pair of fluid passages 57 and 58 by slightly changing the angle of the dial 46 with a finger.

On the other hand, the handpiece of the present invention is not limited to the handpiece 10 having means for rotating the tool 2 at a high speed as shown in Figs. 1 to 3. It may further comprise a means for projecting work light such as a laser to the outside of the handpiece instead of means for rotating the tool 2 at a high speed. Alternatively, it may not include means for rotating the tool 2 at a high speed or means for projecting working light to the outside of the handpiece.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

10: Handpiece 20: Head unit
21: front cover 24: head housing
31, 32: injection nozzle 42: turbine
45: switching unit 46: dial
50: roller contact portion 55: switch body
57, 58: fluid tube 67: roller

Claims (9)

A head unit having an injection nozzle capable of injecting a fluid at a high pressure; And a switching unit capable of adjusting a flow rate of the fluid supplied to the head unit,
The switching unit includes: a switch body having a roller seat groove formed on one side of the outer circumference; A fluid tube connected to the head unit through the roller seating groove to supply fluid to the spray nozzle, the fluid tube being made of an elastic material; A roller that is seated in the roller seating groove and presses the fluid tube in a direction of closing the fluid tube when an external force is applied; And a dial which surrounds the switch body and has a roller contact portion which is in contact with the roller at a portion of the inner circumferential surface,
Wherein when the dial is angularly displaced about the switch body, a point of contact with the roller in the roller contact portion is changed so that an external force applied to the roller, The pressing force is changed,
Wherein the roller contact portion includes a first roller mounting groove portion bent so that the roller can be seated without exerting an external force on the roller when facing the roller. The method according to claim 1,
Wherein the fluid tube is made of silicone resin. The method according to claim 1,
Wherein the plurality of fluid tubes are provided to supply different fluids. The method according to claim 1,
Wherein the roller contact portion includes an inclined groove portion which is extended deeper along the circular arc of the inner circumferential surface. delete The method according to claim 1 or 4,
Wherein the roller contact portion includes a second roller mounting groove portion bent to apply an external force to the roller so as to close the fluid tube when the roller faces the roller and to seat the roller. The method according to claim 1,
Further comprising means for fixing the work tool to one side and rotating the work tool at a high speed. The method according to claim 1,
Further comprising means for projecting working light to the outside.
A head unit having an injection nozzle capable of injecting a fluid at a high pressure; And a switching unit capable of adjusting a flow rate of the fluid supplied to the head unit,
The switching unit includes: a switch body having a roller seat groove formed on one side of the outer circumference; A fluid tube connected to the head unit through the roller seating groove to supply fluid to the spray nozzle, the fluid tube being made of an elastic material; A roller that is seated in the roller seating groove and presses the fluid tube in a direction of closing the fluid tube when an external force is applied; And a dial which surrounds the switch body and has a roller contact portion which is in contact with the roller at a portion of the inner circumferential surface,
Wherein when the dial is angularly displaced about the switch body, a point of contact with the roller in the roller contact portion is changed so that an external force applied to the roller, The pressing force is changed,
Wherein the roller contact portion includes a second roller mounting groove portion bent to apply an external force to the roller so as to close the fluid tube when the roller faces the roller and to seat the roller.

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