JPH0321216Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a light emitting end holding mechanism of a laser fiber in a laser-type dental treatment instrument or the like.

(Prior Art) Recently, dental treatment instruments that utilize lasers have been developed and put into practical use. In this so-called laser-type treatment device, a conduit for loosely inserting and retaining the laser fiber is formed in the treatment device main body, and the light output end of the laser fiber inserted from the base end of the main body is connected to the tip of the conduit. held in the
The laser beam emitted from the light output end is appropriately refracted or condensed by a reflector provided within the head section, and is irradiated onto the affected area through the irradiation port of the head section.

(Problem to be solved by the invention) By the way, in the above-mentioned laser-type treatment device, if the optical axis of the laser beam transmitted by the laser fiber and the center of the reflector do not always match, the irradiation port cannot be accurately illuminated. Laser light is not irradiated,
Since this may impede the treatment, it is especially important to hold the light output end coaxially at the tip of the conduit. Conventional mechanisms for holding the light emitting end are generally complex, and the holding is not completely stable, and if used for a long time, the center of the light emitting end may become misaligned with the reflector, causing unexpected trouble in the treatment area. There were times when this occurred.

The present invention has been developed in view of the above, and it is an object of the present invention to provide a novel laser fiber light emitting end holding mechanism that can hold the light emitting end extremely simply and stably.

(Means and Embodiments for Solving the Problems) The structure of the present invention for achieving the above object will be explained based on the attached embodiment diagrams. FIG. 1 is a partially cutaway longitudinal sectional front view of a dental handpiece employing the mechanism of the present invention, and FIG. 2 is a partially cutaway enlarged exploded perspective view of the portion lined in FIG. That is, the light emitting end holding mechanism of the laser fiber of the present invention holds the fiber 2 at the distal end of the conduit 3 provided to loosely insert and hold the laser fiber 2 into the main body 1 of the laser treatment device along its longitudinal direction. This is a mechanism for holding the light emitting end 21 coaxially, and the inner surface of the distal end of the conduit 3 has a tapered part 31 whose diameter decreases toward the base end of the main body 1, and a tapered part 31 extending from the tapered part 31. A female thread 32 extending over the tip opening is formed at the tip of the fiber 2, and an insertion hole 41 that fits onto the glad coating 22 that covers the fiber 2, and an outer periphery of the glad coating 22 at the inner part of the insertion opening 41. A cylindrical holder 4 including a female screw 42 screwed into the holder 4 is integrally fitted with the external screw, and the tip of the conduit 3 into which the fiber 2 with the holder 4 screwed into the tip is loosely inserted has the above-mentioned A fastener 5 that has a tapered portion 51 whose diameter is reduced forward to align with the tapered portion 31 and a male screw 52 that is connected to the tapered portion 51 and screwed into the female screw 32, and that can be tightly fitted to the outer periphery of the holder 4. are screwed together, and by tightening the fastener 5, the light emitting end 21 of the fiber 2 is stably held coaxially with the tip of the conduit 3 via the holder 4. That is.

FIG. 1 shows a dental laser type handpiece, in which a laser beam from a laser fiber 2 housed in a main body 1 is refracted by a reflector 12 installed in a head section 11, and is directed to an irradiation port 13 of the head section 11. The attached laser female tip 14 focuses the light and irradiates the affected area. The laser fiber 2 is loosely inserted from the proximal end of the main body 1 into a conduit 3 provided coaxially with the axis of the main body 1, and its distal end extends into the head portion 11 and is covered with a glad coating at the distal end. 22 is peeled off and the core 23 is exposed to form the light emitting end 21.

The holder 4 is integrally screwed onto the light emitting end 21 of the laser fiber 2, and the laser fiber 2 is inserted into the conduit 3 from the proximal end of the main body 1 in this state. The holder 4 is made of a metal cylindrical body that includes an insertion port 41 that fits onto the fiber's graft coating 22, a female thread 42 that is also screwed onto the outer periphery of the graft coating 22, and a small diameter portion 44 connected thereto. Further, a circumferential groove 43 is formed on the outer periphery of the holder 4 at a position where the tip of the fastener 5 reaches when the fastener 5 is screwed and tightened. To attach this holder 4 to the tip of the laser fiber 2 with the core 23 exposed, insert the core 23 through the socket 41, fit the socket 41 onto the glad coating 22, push it in more strongly, and tighten the female screw 42. may be screwed onto the outer periphery of the glad coating 22 in a tapping manner. At this time, the small diameter portion 44 is surrounded by the core 23 at a distance 441.

The light emitting end 21 of the laser fiber 2 to which the holder 4 is screwed together as described above is held at the tip of the conduit 3 by the fastener 5. The fastener 5 has a cylindrical shape with an inner periphery that matches the outer shape of the holder 4, and a tapered portion 5 that matches the tapered portion 31 formed on the inner surface of the tip end of the conduit 3.
1. The female thread 3 of the conduit 3 connected to the tapered part 51
2, and an outward flange 54 formed at the proximal end of the male thread 52. This flange portion 54 has a groove 541 recessed therein for applying a tool such as a screwdriver, and the tapered portion 51 is also provided with a plurality of slits 53 along the axial direction from its tip. There is.

The pipe line 3 is formed coaxially with the axis of a shaft body 6 built into the main body 1, and the shaft body 6 is further provided with a passage 61 for a working medium (water, air, etc.) necessary for dental treatment.
The passage 61 is configured such that the liquid is sprayed onto the affected area from a spout 63 provided near the head portion 11 through a circumferential groove 62. In addition, the above pipe line 3
A gap is maintained between the laser fiber 2 and the loosely inserted laser fiber 2, and this gap is filled with another working medium (air, air, etc.).
The working medium sent from this pipe 3 cools the laser fiber 2 while passing through the pipe 3 and coats the surface of the glad coating 22 at the tip of the laser fiber 2 along its length. Through the notches 221, 221 formed along the direction and the gap 441 between the core 23 of the holder 4, the tip of the female tip 14 is ejected from the spout 64 provided near the mounting portion of the laser female tip 14. It is designed to be sprayed towards the target. This spout 64
The working medium injected from the laser female chip 14 functions to cool the diseased part of the affected area, but there is a working medium passage (not shown) in the laser female chip 14 along its longitudinal direction. ), and a working medium can be introduced into the passage to cool the chip 14 from within and eject it from its tip.

(Function) In the handpiece having the holding mechanism configured as described above, when the holder 4 is attached to the light emitting end 21 of the laser fiber 2, the insertion port 41 is externally inserted into the glad coating 22 of the fiber 2, and then The female screw 42 of the holder 4 is connected to this glad coating 22.
This is done by screwing it onto the socket 41.
When the laser fiber 2 is externally inserted, the insertion port 41 serves as a guide hole, and the axes of the holder 4 and the laser fiber 2 coincide, and by subsequent screwing, the two are completely coaxially integrated. In this case, since the graft coating 22 is made of a soft material such as a synthetic resin, screwing can be easily accomplished by the tapping action of the female screw 42 without having to previously carve a male screw on its surface.

Then, the laser fiber 2 equipped with this holder 4 is inserted into the conduit 3 from the base end of the main body 1, and the light output end 21 is extended to the distal end of the conduit 3.
By screwing and tightening the fastener 5 to the tip of the conduit 3 with an appropriate tool, the light emitting end 21 is coaxially held at the tip of the conduit 3. At this time, the tapered part 51 of the fastener 5 advances along the inclined surface of the tapered part 31 on the inner surface of the pipe line 3 as the fastener 5 is tightened, and when the fastening is further strengthened, the tapered part 51 receives a reaction force from the tapered part 31, and the fastener A pressing force is applied to the distal end portion of the fastener 5 in the centripetal direction, and as a result, the distal end portion of the fastener 5 is pressed against the circumferential body of the holder 4, and the holder 4 and the fastener 5 are firmly integrated.

In addition, if the circumferential groove 43 is recessed on the outer periphery of the holder 4 as in the embodiment, the tip of the fastener 5 may partially sink into the circumferential groove 43 by tightening the tool more. This completely prevents the fastener 5 from loosening or coming off. In addition, if slits 53 along the axial direction are provided in the tapered portion 51 of the fastener 5 as shown in the illustration, the tongue-shaped portions partitioned by the slits 53 retain flexibility. In order to become
The above-mentioned pressing force acts effectively, and the fastener 5 and the retainer 4
This will further strengthen the integration. These slits 53... and the circumferential groove 43 are connected to the fastener 5 and the holder 4.
It is extremely effective in making the integration more powerful and is preferably adopted.

Thus, the light emitting end 2 of the laser fiber 2
1 is held coaxially and stably at the tip of the conduit 3 by a holder 4 and a fastener 5, and the light output end 21
The emitted laser light is always directed toward the center of the reflector 12 and is accurately irradiated onto the affected area through the irradiation port 13.

Incidentally, in the above embodiment, a dental handpiece was taken as an example, but it is of course applicable to other therapeutic instruments. It goes without saying that other changes may be made without departing from the scope of the present invention.

(Effect of the invention) As described above, the laser fiber light output end holding mechanism of the present invention is such that the holder 4 and the laser fiber 2 are completely coaxially integrated, and the holder 4 and the conduit 3 are are coaxially and extremely firmly integrated by the fastener 5, the light output end 21 is connected to the conduit 3.
The tip of the laser beam is always held in a fixed position, and the optical axis of the laser beam emitted from the light output end portion 21 does not deviate, ensuring accurate laser treatment. also,
The structures of the holder 4 and the fastener 5 are simple, and holding by these can be performed by extremely simple operations, making them extremely useful. In addition, if the circumferential groove 43, slit 53, etc. are employed as in the embodiment, even more stable and firm holding can be achieved.
Further advantages are increased accuracy and extended service life.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway longitudinal sectional front view of a dental handpiece employing the mechanism of the present invention, and FIG. 2 is a partially cutaway enlarged exploded perspective view of the portion lined in FIG. Explanation of symbols, 1... Treatment device body, 2... Laser fiber, 21... Light output end, 22... Grad coating, 3... Conduit, 31... Tapered part, 3
2...Female thread, 4...Holder, 41...Socket, 4
2... Female thread, 43... Peripheral groove, 5... Fastener, 51
...Tapered part, 52...Male thread, 53...Slit.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. The light emitting end 21 of the fiber 2 at the distal end of the conduit 3 provided to loosely insert and hold the laser fiber 2 along the longitudinal direction within the main body 1 of the laser type treatment device. It is a mechanism for coaxially holding the pipe line 3, and the inner surface of the distal end of the conduit 3 has a tapered part 31 whose diameter decreases toward the proximal end of the main body 1, and a tapered part 31 extending from the tapered part 31 to the distal opening. A female thread 32 is formed on the tip of the fiber 2, and a glad coating 2 covering the fiber 2 is formed.
A cylindrical holder 4 including an insertion opening 41 that is externally fitted into the socket 2 and a female screw 42 that is screwed onto the outer periphery of the glad coating 22 at the inner part of the insertion opening 41 is externally fitted and integrated into the holder. At the tip of the conduit 3 into which the fiber 2 is loosely inserted, there is a tapered part 51 whose diameter is reduced forward to align with the tapered part 31, and a tapered part 51 connected to the tapered part 51 and connected to the female thread 32. A fastener 5 that has a male thread 52 and can be tightly fitted to the outer periphery of the holder 4 is threaded onto the holder 4. By tightening the fastener 5, the light emitting end 21 of the fiber 2 connects to the holder 4. A laser fiber light emitting end holding mechanism characterized in that it is stably held coaxially at the tip of a conduit 3 through a laser fiber. 2. The holding mechanism according to claim 1, wherein a circumferential groove 43 is recessed in the outer periphery of the holding tool 4 at a position where the tip of the fastening tool 5 in the screwed and tightened state extends. 3. The holding mechanism according to claim 1 or 2, wherein the tapered portion 51 of the fastener 5 is provided with a plurality of slits 53 along the axial direction.