JPH0975372A - Microengine handpiece for dental purpose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten an overall length and to facilitate the execution of operation by housing a revolving shaft which is freely attachably and detachably connected to the revolving shaft of a motor and a revolving shaft which is connected via a gear to this revolving shaft and rotates a rotor in a clamping part. SOLUTION: A revolving member 30 is mounted freely turnably with a driving power part 10 to the connecting section of this driving power part 10. A shank (grip part) 20 is connected to the revolving member 30. A shank part 20 turns relatively to the driving power part 10 integrally with a turning member 30 when this shank part 20 is connected to the driving power part 10. Only the shank part 20 turns without turning the driving power part 10. The shank part 20 is composed integrally with the head part 21 and is provided with the revolving shaft 22 which is connected to the revolving shaft 12 of the driving power part 10 when connected to the driving power part 10 on the connection side of the driving power part 10, a bearing 23 which rotatably supports the revolving shaft 22, a gear 24 which is disposed at the front end of the revolving shaft 22, etc. The head part 21 side is provided with the gear 25 and the revolving shaft 26 and the revolutions of the revolving shaft 22 are transmitted to the rotor in the head part 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental micro-engine handpiece used for cutting teeth in dental treatment.

[0002]

2. Description of the Related Art FIG. 3 is an exploded perspective view of an essential part for explaining an example of a conventional contra-angle type dental micro-engine handpiece. In the figure, reference numeral 1 denotes a micro-engine (motor). Power part, 2 is shank part,
Reference numeral 3 denotes a head portion, which are usually integrally connected and used. The micromotor in the power unit 1 is rotated by the electric power supplied through the power line arranged in the hose 4, and the rotation causes the rotation shaft 5, the power transmission shaft (not shown) in the shank unit 2 to rotate. The tooth cutting bar 7 is rotated by being transmitted to the rotary shaft 6 of the head portion 3 via the rotary shaft 6.

As described above, in the conventional contra-angle type micro engine handpiece, it is composed of the power unit 1, the shank unit 2, and the head unit 3, and the working unit of the cutting bar 7 is the rotating shaft. I try to bring it near the extension line of 5.

[0004]

In the above-mentioned conventional contra-angle type handpiece, since three parts are connected and used, especially when the shank portion 2 and the head portion 3 are connected. Therefore, the total length including the power unit 1 becomes longer, and the length from the power unit 1 to the cutting bar 7 becomes longer.
There is a problem that it is difficult to work because the length is long.

In the dental handpiece, both the straight type and the contra-angle type are well known, and the power unit 1 is placed on the bases of the thumb and the index finger in the same manner as when using the pencil and when holding the pencil. And shank part 2 with the middle finger
The work is done by grasping, but at this time, the direction of the cutting bar 7 may sometimes be changed. Thus, in the conventional handpiece, the power unit 1 and the shank unit 2 are non-rotatably connected, so that when the direction of the cutting bar 7 is changed, the power unit 1 and the shank unit 2 are used. , The entire head including the head 3 must be rotated, but since the hose 4 is integrally connected to the power unit 1, a large force is required to rotate these, and the work is It was hard to do.

Further, in the above-mentioned handpiece, the power unit 1 and the shank unit 2 are places that the operator's hand frequently touches, and it is necessary to sterilize the autoclave or the like from time to time. Since electric components such as a motor are housed in No. 1, there is a fear that the electric components may be deteriorated in insulation if the autoclave is frequently applied.

[0007]

According to a first aspect of the present invention, there is provided a grip having a power unit accommodating a motor, and a head unit having one end detachably attached to the power unit and the other end accommodating a rotor. And a grip portion for transmitting a rotation of the motor to the rotor to rotate a cutting tool detachably mounted on the rotor to cut a tooth or the like. Is a first rotating shaft that is detachably connected to the rotating shaft of the motor, and a second rotating shaft that is connected to the first rotating shaft via a gear to rotate the rotor.
The rotating shaft of is stored.

According to a second aspect of the present invention, in the first aspect of the invention, when the handpiece is a contra-angle type handpiece, the gear provided on the first rotary shaft and the second rotary shaft are provided. The gear provided on the shaft means the second
With respect to the rotating shaft of (1), the second rotating shaft meshes at a point before the point where the second rotating shaft intersects with the first rotating shaft.

According to a third aspect of the present invention, in the first or second aspect of the invention, the power unit has a rotating member connected to the gripping unit, and the rotating member is rotatable with respect to the power unit main body. It is what

[0010] The invention of claim 4 is the invention of claim 1 or 2 or 3.
In the invention described above, a cover outer cylinder is detachably provided on the outer periphery of the power unit, and the cover outer cylinder is detached from the power unit and autoclaved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view showing the construction of an essential part for explaining an embodiment of a contra-angle type handpiece according to the present invention. FIGS. 2 (A) and 2 (B) are exploded views of FIG. In the figure, the handpiece according to the present invention comprises a power part 10 and a shank part 20, and a head part 21 has a shank part 20.
Are formed integrally. Power unit 10 and shank unit 2
As shown in FIGS. 2 (A) and 2 (B), 0 is configured to be disassembled, and when used, as shown in FIG. 1, they are integrally connected and used.

The power unit 10 includes a motor 11 and the motor 11
When the shank portion 20 is connected to the power unit 10, the rotary shaft 12 and the shank portion 20 are provided.
The rotation of the motor 11 is transmitted to the gear 24 through the rotation shafts 12 and 22, and then the rotation of the gear 24 is transmitted to the rotation shaft 26 via the gear 25. Is transmitted to the rotor inside. Head part 2
A well-known rotor that is rotated by a rotating shaft 26 is provided in the rotary shaft 1, and a cutting bar 27 that is removably mounted on the rotor is rotated, whereby the gear is cut.

In the present invention, the rotating member 30 is connected to the connecting portion of the power unit 10 via the bearing 31.
It is mounted rotatably with respect to 0, and the shank 20 is connected to the rotating member 30. Therefore, when the shank portion 20 is connected to the power unit 10, the shank portion 20 rotates integrally with the rotating member 30 with respect to the power unit 10. Therefore, during use, it is possible to rotate only the shank portion 20 without rotating the power unit 10. As described above, when changing the direction of the cutting bar 27, the power unit and the cord can be changed. Since it is not necessary to rotate, it is very light, that is, it can be rotated without using a large amount of power, and the operation is very easy.

In the present invention, the shank portion 20 is integrally formed with the head portion 21, and as shown in FIG. When connected, a rotary shaft 22 that is connected to the rotary shaft 12 of the power unit 10, a bearing 23 that rotatably supports the rotary shaft 22, and a gear 2 provided at the tip of the rotary shaft 22.
4, a gear 25 that meshes with the gear 24, and a rotary shaft 2 that is rotated by the gear 25 on the head portion 21 side.
6, the rotation of the rotary shaft 22 is transmitted to the rotor in the head portion 21 via the gears 24, 25 and the rotary shaft 26 so as to rotate the cutting bar 27 detachably attached to the rotor. Has become.

Reference numeral 28 denotes an optical fiber for illuminating the working portion (the tip portion of the cutting bar 27).
Light from a light bulb 32 provided on the rotating member 30 is introduced into the optical fiber 8, and the light from the light bulb 32 propagates in the optical fiber 28 and is radiated from the tip of the optical fiber 28. Illuminate the work area. Further, the rotating shafts 22 and 26 are connected by using a bevel gear or the like, and the gears 24 and 25 of the rotating shaft 22 and the rotating shaft 26 mesh with each other at a point before the extension line of the rotating shaft 26 intersects with the rotating shaft 22. By doing so, the length of the shank 20 can be shortened, and when the handpiece is held, the distance from the hand to the cutting bar is shortened to facilitate the work.

Further, a cover outer cylinder 40 is removably provided on the outer periphery of the power unit 10, and the cover outer cylinder 40 is sometimes removed to autoclave the cover outer cylinder 40. In this way, the motor disposed in the power unit 10 and its wiring, and further, the electric parts including the electric contacts are not autoclaved, and therefore these are not deteriorated by the autoclave, Only the cover outer cylinder, which the surgeon frequently touches, can be autoclaved.

[0017]

According to the first aspect of the present invention, there is provided a power unit for accommodating a motor, and a gripping unit having a head portion, one end of which is detachably attached to the power unit and the other end of which is a rotor. A dental micro-engine handpiece that has rotation of the motor and transmits a rotation of a cutting tool that is detachably attached to the rotor to cut teeth, etc. A first rotation shaft detachably connected to the rotation shaft of the motor and a second rotation shaft that is connected to the first rotation shaft via a gear and rotates the rotor are housed. Therefore, it is possible to provide a handpiece that has a smooth outer shape of the grip portion, is smart in appearance, and is easy to use.

According to the invention of claim 2, in the invention of claim 1, the gear provided on the first rotary shaft and the gear provided on the second rotary shaft are the second rotary shaft. With respect to the shaft, since the second rotary shaft is meshed at the front point by the point where the second rotary shaft intersects with the first rotary shaft, in the contra-angle type handpiece, the length of the handpiece is shortened, It can be easy to use.

According to the invention of claim 3, claim 1 or 2
In the invention, the power unit has a rotary member connected to the grip unit, and the rotary member is rotatable with respect to the power unit main body, so that the power unit can be gripped without rotating. Since the direction of the cutting bar can be changed by rotating only the part, the work is very easy.

According to the invention of claim 4, claim 1 or 2
Or, in the invention of 3, the cover outer cylinder is detachably provided on the outer periphery of the power unit. Therefore, only the cover outer cylinder needs to be autoclaved, and it is not necessary to autoclave the electric parts in the power unit. It is possible to eliminate deterioration of parts.

[Brief description of drawings]

FIG. 1 is an overall schematic diagram of a main part for explaining an embodiment of a dental microengine handpiece according to the present invention.

2 is an exploded view of the dental microengine handpiece shown in FIG. 1. FIG.

FIG. 3 is an exploded perspective view of a main part for explaining an example of a conventional contra-angle type micro engine handpiece.

[Explanation of symbols]

10 ... Power part, 11 ... Motor, 12 ... Rotating shaft, 20 ... Shank part, 21 ... Head part, 22 ... Rotating shaft, 23 ... Bearing, 24, 25 ... Gear, 26 ... Rotating shaft, 27 ... Cutting bar, 28 ... optical fiber, 30 ... rotating member, 31 ... bearing, 32 ... light bulb, 40 ... cover outer cylinder, 50 ... hose.

Claims (4)

[Claims] 1. A power unit for accommodating a motor, and a gripping unit having one end removably attached to the power unit and a head part for accommodating a rotor at the other end, for rotating the motor. In a dental micro-engine handpiece that transmits to the rotor and rotates a cutting tool that is detachably attached to the rotor to perform tooth cutting and the like, the gripping portion is detachably attached to a rotation shaft of the motor. A first rotation axis connected
A dental microengine handpiece, which houses a second rotary shaft that rotates the rotor by being connected to the first rotary shaft via a gear. 2. A gear provided on the first rotating shaft,
The gear provided on the second rotating shaft meshes with the second rotating shaft at a point before a point where the second rotating shaft intersects the first rotating shaft. Claim 1
Contra-angle type dental micro-engine handpiece described in. 3. The power unit has a rotating member connected to the grip unit, and the rotating member is rotatable with respect to the power unit main body. Dental Micro Engine Handpiece. 4. The dental microengine handpiece according to claim 1, further comprising a cover outer cylinder detachably attached to an outer periphery of the power unit.