JPH0355134B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present application relates to a dental treatment instrument equipped with a light source and a light guide wire therein so as to illuminate the affected area in the oral cavity by emitting light from the distal head to facilitate treatment. In particular, the light source section provided inside the device is configured to be cooled using pressurized air after driving a driving section such as an air turbine or an air motor provided inside the device. In detail, this dental treatment instrument has, for example, a tip head a.
A hand-held member A having a drive unit such as an air turbine driven by pressurized air, and a joint member B having a flexible hose b attached to its rear end are connected via a connecting mechanism C. . The hand-held member A is formed by a shaft tube 1 in which front and rear cylinders are screwed together, and a light guide 2 made of an optical fiber whose tip extends to the tip head a of the hand-held member A at the center position of the rear end. The rear end portion of is held by a holding cylinder 3. This holding cylinder 3 is made of a short cylinder fitted into the middle part of the shaft cylinder 1 and having a protruding part 4 extending from the front central part,
The holding tube 3 is notched in the axial direction at its diametrically opposed outer circumferential portion, and forms exhaust passages 5, 5 with the inner circumferential surface of the shaft tube 1. Sleeve 6 into which the rear end of 2 is fitted
A small-diameter holding hole 7 into which the holding hole 7 is inserted is provided, and a large-diameter fitting hole 8 communicating with the holding hole 7 is provided in the body, respectively.
Further, inside the shaft tube 1, as shown in FIG. 4, outer peripheral side portions 10', 10' facing each other in the diametrical direction are cut out and communicate with the passages 5, 5 through the inner peripheral surface of the shaft tube 1. A fitting cylinder 10 forming the exhaust passages 9, 9 is fitted successively to the rear surface of the holding cylinder 3, and the front part of the outer parts 10', 10' of this fitting cylinder 10 is provided with an exhaust passage. Rectangular openings 11, 11 are provided to communicate the passages 9, 9 with the inside, and a thin protrusion ring 12 extends from the rear end of the fitting cylinder 10. A connecting cylinder 14 is provided on the outer periphery and is concentric with the projection ring 12 and has an annular groove 13 around the outer periphery. A cylindrical exhaust port 16 is formed between the protrusion ring 12 and the connecting tube 14 and communicates with the exhaust passage 9. First and second air supply pipes 17 and 18 for guiding pressurized driving air and tip air to the tip head a of the hand-held member A are connected to the thick side portions of the fitting cylinder 10 that are not cut out. first and second air holes 19 and 20, and a water pipe 2 that guides water to the tip head a of the hand-held member A.
A water hole 22 connected to the holding cylinder 3 at the tip is provided through the water hole 22 along the axial direction, and a through hole 23 having approximately the same diameter as the fitting hole 8 of the holding cylinder 3 is provided at the tip. A fitting recess 24 having a slightly larger diameter than that of the fitting recess 24 extends therethrough.

On the other hand, the joint member B is fitted with an air-liquid tight O-ring 25 at a proper position on the outer periphery of the fitting recess 25 of the hand-held member A.
An insertion cylinder 26 into which the front half is rotatably fitted.
is provided in a protruding manner at the front end of a cylinder 29 forming the coupling member B via attachment rings 27 and 28, and the front end surface facing the rear surface of the light guide 2 is opened at the tip of this insertion cylinder 26. The rear end of a cylindrical light source section 31 housing a light bulb 30 therein is removably screwed together with the mounting ring 28, and the mounting ring 28 is provided with an exhaust notch 36 that communicates between the front and rear surfaces. There is. The light source section 31 has an engagement recess 32 in the center of the front surface, and a pair of cylindrical contacts 33, 33 provided around the engagement recess 32 in the front end of the insertion cylinder 26 is inserted into the engagement recess 32. a plug member 35 having a pair of rod-shaped contacts 34, 34; and a light bulb 30 whose rear end protrusion fits into the engagement recess 32 and is electrically connected to the pair of rod-shaped contacts 34, 34, respectively. It is comprised of a cylindrical lamp housing 37 that surrounds the light bulb 30 and whose rear end is screwed onto the outer periphery of the tip of the plug member 35, and a cartridge holder 38 that surrounds the cylindrical lamp housing 37. The rear end of the insertion tube 26 is connected to an air supply source via a flexible hose b, so that pressurized air is guided into the insertion tube 26 and communicated with the outer surface of the tip. The rear end is connected to an air supply source via a flexible tube 40, and the tip is connected to the outer surface of the middle part of the insertion cylinder 26. A second air supply path 41 opens at the end and communicates with the second air hole 20, a rear end connects to a water supply source via a flexible tube 42, and a tip opens at the side surface of the intermediate portion of the insertion cylinder 26. A water supply channel 43 communicating with the water hole 22 is provided. The cylinder body 2
The other side of the coupling mechanism C is formed at the front end of the cylinder 29, and the other side is provided with an external tube 44 on the outer periphery of the cylindrical body 29, and a steel ball that engages with the annular groove 13 in a through hole 45 opened therein. 46 and is constantly pressed in the front end direction by the inner periphery of the outer tube 44 so that the steel ball 46
Push the cylinder body 2 outward and insert it into the fitting recess 24.
6 is inserted, the outer ring is pressed against the connecting tube 14 and the bearing 47, which moves rearward, is attached to the outer periphery of the outer tube 44 via the inclined stepped portion 48 between the front end of the large diameter portion 49 and the small diameter portion 50. and an operation cylinder 51 which is always pressed forward and which are connected to each other are arranged so as to be slidable in the axial direction. A contact holder 52 is screwed onto the front end of the insertion cylinder 26 so as to close the inner hole thereof, and the plug member 35 is attached to this contact holder.
A cylindrical contact 3 into which rod-shaped contacts 34, 34 are inserted
3 and 33 are provided.

Therefore, the air supply source is inserted into the insertion cylinder 26 and into the second air supply path 41 via the flexible hose b and the flexible tube 40.
When pressurized air is supplied to the insertion cylinder 2 and water is supplied from the water supply source to the water supply channel 43 through the flexible pipe 42, the insertion cylinder 2
The pressurized air that has flowed into the first air pipe 17 flows into the first air pipe 17 through the first air hole 19, is guided to the tip head a of the hand-held member A, and drives, for example, an air turbine. After driving the pressurized air, the pressurized air reaches the exhaust passages 9, 9 through the passages 5, 5 in the shaft cylinder 1, and cools the outer peripheral surface of the light source part 31 exposed through the openings 11, 11. The air is discharged from the rear end of the joint member B to the atmosphere through the exhaust port 16 and the inside of the cylinder 29. Also, the second air hole 20
The water flows into the second air supply pipe 18 through the water supply pipe 18, is guided toward the tip of the hand-held member A, and is supplied to the jet nozzle provided at the tip head a. The water flows into the water pipe 21 through the water pipe 21, is guided toward the distal end of the hand-held member A, and is supplied to the water nozzle provided at the distal end head a.

The above embodiment shows a configuration in which the outer circumferential surface of the light source section 31 is air-cooled using pressurized air after the turbine is driven, but in FIG. This shows the most preferred embodiment of the present invention in which the light source section 31 is air-cooled inside the light source section 31 to increase the air cooling effect. The plug member 35 is provided through the air inlet hole 61 and is provided with an annular gap 62 between the outer peripheral surface of the light bulb 30 and the lamp housing 37 surrounding it.
A ventilation hole 63 opens in communication with the engagement recess 32 at the axis of the engagement recess 32 , and a ventilation hole 63 opens along the outer periphery of the engagement recess 32 .
A slit 64 communicating with the fitting cylinder 1 is provided between the cartridge holder 38 and the holding cylinder.
This is because a gap 65 communicating with the opening 11 of 0 and 10 is formed.

According to this embodiment, a portion of the pressurized air supplied from the air supply source into the insertion cylinder 26 is transferred to the air intake hole 6.
1 flows into the annular gap 62 between the light bulb 30 and the lamp housing 37 through the ventilation hole 63 and slit 64 of the plug member 35, contacts the outer circumferential surface of the light bulb 30, and removes heat from the light bulb 30. The pressurized air that has passed forward through the section 62 and then cooled the gap 65 flows out into the openings 11, 11, merges with the exhaust air that has air-cooled the outer periphery of the cartridge holder 38, and flows from the rear end of the joint member B. released into the atmosphere.

Although the above embodiment shows the case where the light source section 31 is provided on the side of the joint member B, it is also possible to provide an electrical connection between the hand-held member A and the joint member B that conducts when they are connected. Of course, a light source section can be provided on the hand-held member A side.

As described above, according to the present application, in addition to air cooling the outer periphery of the light source using the pressurized air before and after driving the drive unit of the treatment instrument, the air is also applied to the annular gap between the light bulb and the light source. Since pressurized air is supplied to air-cool the entire circumference of the bulb, the cooling effect is remarkable and the lamp has the advantage of being able to withstand long-term use.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is an overall side view, FIG. 2 is an enlarged sectional view of the main part, FIG. 3 is an enlarged sectional view of the main part cut at a different position from FIG. 2, and FIG. 4 is a perspective view of the fitting cylinder, and FIG. 5 is a sectional view of another embodiment corresponding to FIG. 2. In the figure, 2 is a light guide, 3 is a holding cylinder, 9 is an exhaust passage,
10 is a fitting cylinder, 11 is an opening, 30 is a light bulb, 3
1 is a light source part, 35 is a plug member, 61 is an air intake hole,
62 is a gap, and 65 is a gap.

Claims (1)

[Scope of Claims] 1. A light source section that includes a rotating section of a cutting bar and houses a light bulb connected to a power source through a plug member, and a rear surface that extends toward the tip of the light bulb, facing the light bulb. a light guide that emits light from a hand-held member to the outside; a holding tube that holds the rear end of the light guide so that its rear surface faces the light bulb; a front end surface is joined to the rear end surface of the holding tube; and a dental treatment instrument comprising a fitting cylindrical body in which the light source part is fitted inside the tip, and an exhaust passage for exhausting pressurized air after driving the driving part, the fitting cylindrical body being in contact with the exhaust passage; An opening that exposes the outer wall of the light source is provided in a part of the outer side of the combined tube, and an annular gap is formed between the light bulb and the inner wall of the light source, and the plug member is provided with an opening in the gap. A dental treatment instrument comprising an air intake hole for introducing pressurized air supplied from an air supply source, and a gap in the holding cylinder that communicates the gap and the opening. 2. A hand-held member and a joint member having a flexible hose at the rear thereof are removably connected, and the hand-held member is provided with a fitting cylinder portion, and the joint member is provided with a light source. The dental treatment instrument according to item 1.