KR101441446B1 - Fixing module for rotational stability and reducing of noise and dental clinic handpiece with the same - Google Patents

Abstract

The present invention relates to a buckling module having a buckling preventing function and a dental handpiece having the buckling prevention module. The buckling module eliminates sticking phenomenon in which burrs and buffers stick together without burring.
In the present invention, the bur fixing module includes a shaft having a sloped inclined region provided at a central portion of the impeller to rotate together when the impeller rotates, and having a larger inner diameter toward an upper portion of a portion of the inner peripheral surface, ; A burr holder inserted into the shaft in a state where the burr is sandwiched in an inner hollow and having a plurality of through holes for burrs arranged along the circumferential direction; A spring elastically supporting the burr holder downward from an inner upper portion of the shaft; And a plurality of burrs inserted into the through holes for the burr holes of the burr holder so as to be in contact with a plurality of burrs buried in the hollow of the burr holder so that the burrs are pushed inwardly toward the lower side, Wherein the bufine is surface-treated to prevent a sticking phenomenon due to contact between the burr and an inclined region of the shaft.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a buckling module having a rotation stability and a noise prevention function, and a dental handpiece including the buckling module,

The present invention relates to a dental handpiece, and more particularly, to a bur fixing module having a rotational stability and a noise preventing function for improving rotation stability and minimizing noise generated during rotation of a bur, and a dental handpiece having the same .

Generally, a dental handpiece is a necessity for dental tooth replacement in dentistry. It is used by inserting a bur in a handpiece.

The conventional structure and operation of such a dental handpiece will be described with reference to FIGS. 1 and 2. FIG.

1 and 2, a conventional dental handpiece H is installed at the center of the housing 5 so that the shaft 2 is rotatable while being supported by the bearing 6, and on the outer side of the shaft 2, And the impeller 1, which receives the air pressure and rotates, is coupled.

At this time, the bearings 6 are installed on the upper side and the lower side of the shaft 2, and on the outer side of the bearings 6, a role of holding the outer ring of the bearings 6 and a function of absorbing vibrations generated during rotation An O-ring damper 7 is provided.

A push button cap 8 is provided on the upper side of the housing 5 and a push button 9 is provided on the push button cap 8. The push button 9 is provided on the lower side of the push button 9, A bucket holder 10 is installed and a bucket 11 is installed below the bucket holder 10 to allow the buckle 12 to be detached by opening or closing the bucket with the bucket holder.

A spring 3 is provided on the lower portion of the bucket 11 so as to allow the bucket holder 10 and the bucket 11 to descend as the push button 9 is pressed. And a spring cap 4 is screwed on the lower end to prevent the spring 3 from coming off.

On the other hand, the inner circumferential surface of the shaft 2 is inclined with respect to the state before the spring 3 is compressed, and the upper portion of the buffer 11 is larger than the lower portion of the bucket 11 Diameter.

As shown in Fig. 2, in the conventional handpiece H configured as described above, when replacement of the burr 12 is required or removal of the burr 12 is desired in a state where the burr 12 is mounted, .

First, when the push button 9 is pressed, a pressing force is transmitted to the spring 3 through the buffer holder 10 and the buffer 11, and the buffer holder 10 and the buffer 11 are lowered.

As the bucket 11 and the bucket 11 descend out of the inclined plane and the inside of the shaft 2 is located at a larger diameter due to the lowering of the bucket holder 10 and the bucket 11, 12 can not perform the wedge action.

At this time, when the burr 12 is pulled out, the burr 11 is opened to the outside, so that the interference between the burr 12 and the burr 11 is relieved, and the burr 12 is completely disengaged from the handpiece.

When the burr 12 is inserted, the burr 12 is fully inserted in the state where the pushbutton 9 is pressed as described above. When the pushing force of the pushbutton 9 is removed, 3, the burr holder 10 and the bufin 11 rise, and the burr 12 is held by the buf pin.

That is, due to the restoring force of the spring 3, a pushing force is applied to the bucket 11 located on the inclined surface of the shaft 2, so that the bucket 11 performs a wedge action, Is fixed to the bucket holder (10) by being hooked to the buffer (11).

However, in the handpiece according to the related art, the spring 3 is positioned between the bucket 11 and the spring cap 4. Since the spring 3 is directly exposed to the burr 12, The coaxial axis of the burr 12 is deformed and the burr 12 or the spring 3 is worn or a noise is generated.

Further, the spring cap 4 is coupled to the shaft 2 through a screw connection, which has a problem that when the spring cap 4 is screwed, the spring cap 4 acts as an element for deforming the coaxiality of the burr 12.

Further, according to a further conventional technique not shown, when the push button 9 is depressed, the shaft 2 and the bur holder 10 are lowered together so as to press or release the bur 12, The shaft 2 and the bur holder 10 are lowered together and friction with the bearing 6 or the O-ring damper 7 is generated. In this case, There was also a problem.

If the noise is generated or the coaxial shaft is deformed, the burr 12 and the parts for fixing the burr 12, the shaft 2, the bur holder 10, I had to replace it.

Further, the dental handpiece is a tool for cutting teeth by rotating the impeller 1 of the cartridge at high speed up to 400,000 rpm by using air, and the force in the direction opposite to insertion of the burr 12 due to coaxial deformation by continuous use There is a problem that a phenomenon of frequent departure occurs frequently. In addition, when the burr 12 is detached as described above during the treatment, the burr 12 may enter the patient's mouth and enter the airway, which may result in a dangerous situation.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the related art as described above, and an object of the present invention is to provide a noise reduction method and a noise reduction method, And a dental handpiece having the same.

According to an aspect of the present invention, there is provided a burr fixing module for fixing a bur in a dental handpiece according to an embodiment of the present invention is provided with a support end at a central portion of the impeller so as to rotate together when the impeller rotates, An end cap disposed at an upper end of an inner surface of the hollow shaft and having a sloped inclined oblique area to allow a larger inner diameter from a certain section of the inner circumferential surface toward an upper side; A burr holder inserted into the end cap in a state of being fitted in the hollow and having a plurality of through holes for burps arranged along the circumferential direction; And a plurality of burrs inserted into the through holes for the burrs of the burr holder to be in contact with a plurality of burrs inserted into the hollows of the burrs, And a spring which is provided between the support shaft and the hollow shaft and pushes the burr into the inclined region of the end cap toward the lower side as the inner diameter becomes narrower to perform the wedge action .

The upper end of the burr is inserted into the inner circumferential surface of the end cap and the lower end of the burr is screwed into the inner circumferential surface of the hollow shaft support end to be integrated with the hollow shaft.

The burr holder may be integrally fixed to the hollow shaft so as not to move relative to the hollow shaft, and the hollow shaft may be integrally formed with the housing so as not to move relative to the housing surrounding the outside of the burr fixing module Can be fixedly installed.

The end cap may be provided so as to be movable relative to at least one of the hollow shaft, the bur holder, and the bucket.

Further, the pressing force of the end cap can be transmitted only to the spring without being transmitted to the hollow shaft or the buffer holder.

And, when the bur buried in the inner hollow of the burr holder, a part of the bur buried in the inner hollow can be exposed only to the bur holder and the bur bur without being exposed to the end cap or the spring.

According to another aspect of the present invention, there is provided a dental handpiece comprising: a housing; An impeller rotatably installed inside the housing; A burr fixing module installed at a central portion of the impeller to rotate together with the impeller when the impeller rotates; A burr fixed by the bur fixing module; And a bearing installed at upper and lower portions of the bur fixing module to rotatably support the bur fixing module, wherein the bur fixing module may be the bur fixing module.

The bur fixing module and the dental handpiece having the same according to the present invention prevent the direct contact between the bur and spring and the direct contact between the bur and the shaft, thereby eliminating noise problems and rotational safety problems generated during high- There is an effect that can be done.

Further, since the pressing force when the end cap (spring cap) is pressed is not transmitted to the burr holder or the shaft but only to the spring, the present invention does not require the end cap to be coupled to the shaft through the screw connection, There is an effect that the problem of coaxial deformation occurring when the end cap is screwed can be solved.

Further, since the pressing force when the end cap (spring cap) is pressed is not transmitted to the bur holder or the shaft but the bur holder or the shaft is fixed, the bearing or the O-ring damper There is an effect that the problem of friction can be solved.

FIG. 1 is a view for explaining the structure and operation of a conventional dental handpiece.
2 is a view for explaining the structure and operation of a conventional dental handpiece.
3 is a cross-sectional view of a main part of a dental handpiece according to an embodiment of the present invention.
4 is a cross-sectional view of a bur fixing module according to an embodiment of the present invention.
5 is an exploded perspective view of a burr fixing module according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a cross-sectional view of a main part of a dental handpiece according to an embodiment of the present invention.

As shown in the drawing, a dental handpiece according to an embodiment of the present invention includes a housing 170, an impeller 180 rotatably installed inside the housing 170, A burr fixing module M installed at the center of the impeller 180 to rotate the burr fixing module M and a burr 110 fixed by the burr fixing module M, And a bearing 190 rotatably supporting the bearing.

Here, the shaft fixing unit M is integrated with the shaft 120 and the bur holder 130 so as to solve the noise problem and the coaxial deformation problem generated at the time of high-speed rotation while firmly fixing the burr 110 The pressing force of the end cap 160 due to the push operation of the push button 171 is transmitted only to the spring 150 and is not transmitted to the shaft 120 and the burher holder 130 so that the bearing 190 or the O- There is no relative movement of the contrast shaft 120 and the end cap 160 and the shaft 120 do not have a coupling method such as a separate screw coupling.

As a result, since the coaxial axis of the burr 110 is deformed, it is possible to completely solve the problem of replacing the burr 110 or the burr fixing module M with a new one.

Hereinafter, the configuration of the dental handpiece according to the embodiment of the present invention will be described in more detail with reference to a buckling module (M).

FIG. 4 is a cross-sectional view of a burr fixing module according to an embodiment of the present invention, and FIG. 5 is an exploded perspective view of a burr fixing module according to an embodiment of the present invention.

The buffer fixing module M according to an embodiment of the present invention includes a shaft 120, a bur holder 130, a bufine 140, a spring 150, and an end cap 160 And the shaft 120 and the bur holder 130 are integrated and the shaft 120 or the bur holder 130 and the end cap 160 do not have a separate structure for unifying such as screw connection.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the respective constituent elements.

First, the shaft 120 has a hollow tube shape and is installed at a central portion of the impeller 180 so as to rotate together with the impeller 180 when the impeller 180 rotates, and has a support end 121 at a lower portion thereof. The shaft 120 is not moved relative to the bearing 190 or the O-ring damper 191 even when the push button 171 is pushed, so that the bearing 190 or the O- Friction between the damper 191 and the shaft 120 can be prevented.

The end cap 160 is disposed at the upper end of the inner surface of the hollow shaft 120 and does not have a separate coupling shape such as a screw connection with the shaft 120 or the bur holder 130. Particularly, even if the push button 171 located at the upper end is pushed, only the end cap 160 is lowered without affecting the shaft 120 or the bur holder 130 to press the spring 150, .

In addition, the end cap 160 is provided with an inclined oblique region which allows the inside diameter of the end cap 160 to have a larger inside diameter in a certain section of the inner circumferential surface. Then, the push button 171 and the upper opening of the shaft 120 are blocked.

The burr holder 130 is inserted into the end cap 160 in a state where the burr 110 is sandwiched between the inner hollows and has a plurality of burr holes 132 arranged along the circumferential direction. The burr hole 130 is a tubular member that supports the burr 110 with the burr 110 interposed therebetween. The burr hole 132 has a plurality of buffers 140 arranged in a predetermined position along the periphery of the burr 110 It is the role of the place to be. As a result, a plurality of buffers 140 seated through the through holes 132 for the buffers can stably press and support the burrs 110.

In order to correspond to the inclined oblique area of the end cap 160 of the above-described end cap 160, the bur holder 130 has an area having a larger diameter toward the upper side in a part of its outer circumferential surface, Stage 131 is provided.

Of course, even if the burher holder 130 does not have a separate support end 131, the burr holder 130 is coupled to the shaft 120 having the separate support end 121 through the coupling protrusion Therefore, it may be assumed that the holder 130 does not have the support end 131.

It goes without saying that the same logic can be applied when the bur holder 130 has the support end 131 and the shaft 120 does not have the support end 121. [

Even if the shaft 120 does not have a separate support end 121 and the burr holder 130 does not have a separate support end 131 as shown in the figure, The present invention can be applied to a case where the holder 130 is fixed to the stopper 172 of the holder 130 and the holder 130 is coupled to the shaft 120. [

The buffers 140 are inserted into the through holes of the burr holder 130 to be seated thereon and are provided so as to surround a plurality of burrs 110 fitted in the hollow of the burr holder 130, ) From the outside.

The burr 140 is disposed radially surrounding the burr 110 by the burr holes and is pushed inward by the inclined area 141 of the inner circumferential surface of the shaft 120 to press the burr 110 To perform a wedge action.

The spring 150 is provided between the lower end of the end cap 160 and the hollow shaft supporting end 121 inside the hollow shaft 120 to elastically support the end cap 160, And the wedge action is performed by pushing the burr 110 while being pushed inward toward the lower side where the inner diameter becomes narrower from the inclined area of the cap 160. [

As described above, since the shaft 120 and the bur holder 130 are fixed by the support ends 121 and 131, the end cap 160 is directly exposed to the burr 110 when the end cap 160 descends The shaft 120 to be brought into contact is fixed without moving and the pressing force of the end cap 160 is transmitted only to the spring 150 which is not in direct contact with the burr 110.

The empty space generated by the spring 150 and the spring 150 that are contracted / relaxed does not directly touch the burr 110 but is blocked by the burr holder 130, Since the hollow is formed deep inside the burr fixing module M in a long shape so as to guide the entrance path of the burr 110 by the empty space between the spiral spring 150 and the spiral spring 150, It is possible to prevent a noise generation phenomenon or a coaxial deformation phenomenon.

It is also not necessary to screw the end cap 160 to the shaft 120 or the bur holder 130 because it is not necessary to secure the end cap 160 and the shaft 120 or the bur holder 130 to each other And it is possible to prevent the coaxial deformation phenomenon occurring when the screw is engaged.

The process of mounting the bur in the dental handpiece according to the present invention will be described.

First, in the state where the burr 110 is mounted, it is required to replace the burr 110 or to remove the burr 110 as follows.

When the user presses the push button 171, a pushing force is transmitted to the end cap 160 in contact therewith, and the end cap 160 is lowered by pressing the spring 150.

When the end cap 160 is lowered, the burr holder 130 is fixed by the support end 131, so that the inclined area of the end cap 160 is inclined with respect to the inclined area of the end cap 160 Relative to the bucket holder 130 and the bucket 140 having an inclined region.

Accordingly, the position of the buffer 140 is shifted to a relatively large diameter in the inclined region of the inner peripheral surface. That is, as the end cap 160 is continuously lowered in the state where the buffer holder 130 is stopped, the same result as that of the buffer holder 130 relative to the end cap 160 is obtained, The buf pin 140 is no longer able to perform a wedge action with respect to the burr 110 as the upper portion of the beveled region is located in a larger diameter region.

Accordingly, when the bur 110 is gripped and pulled out, it easily comes out of the fixing module of the handpiece.

Next, the mounting process of the burr 110 according to the replacement of the new burr 110 in the dental handpiece of the present invention will be described.

The push button 171 is fully pressed and the burr 110 is pushed into the burr holder 130 as much as possible and then the pressing force against the push button 171 is removed.

When the pushing force on the push button 171 is removed, the end cap 160 descending due to the elastic restoring force rises again because the bucket holder 130 descends relative to the end cap 160 The buckle 140 is positioned in an inclined region of the inner circumferential surface of the end cap 160 so that the burr 110 inserted into the burr holder 130 is held and fixed to the buf pin 140.

That is, due to the restoring force of the spring 150, a pushing force is applied to the buffer 140 so as to be positioned in an inclined region in the inner circumferential surface of the end cap 160, And is fixed to the end cap 160 by being attached to the bufine 140.

As described above, the dental handpiece according to the embodiment of the present invention eliminates the problem of noise generation and coaxial deformation while fixing the burr 110 with the bur fixing module M stably, The problem can be solved completely.

In the above, since the shaft 120 and the bur holder 130 are integrally formed, there is no problem such as friction between them, but surface treatment and surface machining can be performed between parts where friction may occur.

For example, the surface treatment may include nitriding heat treatment, metal plating, ceramic coating, and the like, which can improve the adhesiveness.

In the surface machining, the surface of the end cap 160, which moves absolutely by pressurization, the surface of a relatively moving buffet 140, or the like, or the end cap 160 which moves in the absolute direction or the buff pin 140 And a method of inserting lubricant by forming a plurality of grooves on the surface of the piston.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is clear that the present invention can be suitably modified and applied in the same manner. Therefore, the above description does not limit the scope of the present invention, which is defined by the limitations of the following claims.

110: Burr 120: Shaft
121: Support stage 130: Bur holder
131: Supporting end 132:
140: Buffer 150: Spring
160: end cap 170: housing

Claims (7)

A burr fixing module for fixing a burr in a dental handpiece,
A hollow shaft installed at a central portion of the impeller to rotate together with the impeller when the impeller rotates,
An end cap disposed at an upper end of an inner surface of the hollow shaft and having a sloped inclined region that has a larger inner diameter from a certain section of the inner peripheral surface toward an upper portion;
A burr holder inserted into the end cap with the bur buried in the inner hollow and having a plurality of through holes for burrs arranged along the circumferential direction;
A plurality of burrs inserted into the through holes for the burrs and inserted into the hollows of the burrs,
Wherein the end cap is provided between the lower end of the end cap and the hollow shaft support end to elastically support the end cap, the inner end of the end cap is inclined downward from the inclined area of the end cap toward the lower end, And a spring for pressing the burr to perform a wedge action. The method according to claim 1,
Wherein the burr holder comprises:
Wherein the upper end of the bur is inserted into the inner circumferential surface of the end cap and the lower end of the bur is screwed into the inner circumferential surface of the hollow shaft support end to be integrated with the hollow shaft. The method according to claim 1,
Wherein the burr holder is integrally fixed to the hollow shaft so as not to move relative to the hollow shaft,
Wherein the hollow shaft is integrally fixed to the housing so as not to move relative to a housing surrounding the outside of the burr fixing module. The method according to claim 1,
Wherein the end cap is provided so as to be movable relative to at least one of the hollow shaft, the bur holder, and the bucket. The method according to claim 1,
Wherein the pressing force of the end cap is transmitted to the spring without being transmitted to the hollow shaft or the burher holder. The method according to claim 1,
When the bur buried in the inner hollow of the burr holder,
Wherein a portion of the burr embedded in the inner hollow is exposed only to the burr holder and the burp without being exposed to the end cap or the spring. A housing;
An impeller rotatably installed inside the housing;
A burr fixing module installed at a central portion of the impeller to rotate together with the impeller when the impeller rotates;
A burr fixed by the bur fixing module;
And a bearing installed at upper and lower portions of the bur fixing module to rotatably support the bur fixing module,
Wherein the bur fixing module is the bur fixing module according to any one of claims 1 to 6.

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