JPS6051902B2 - dental treatment instruments - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to dental treatment instruments such as handpieces, and in particular to handpieces and the like that can facilitate treatment by irradiating the affected area in the oral cavity with light emitted from the tip head. The present invention relates to dental treatment instruments.

Conventionally, in the case of dental treatment instruments such as handpieces, when irradiating light from the tip head, an external light source is used,
Light is emitted from the tip of the dental treatment instrument by guiding the light between the tip and the tip of the dental treatment instrument using a long optical fiber.

However, with this configuration, a considerable length of optical fiber must be used, which makes the entire treatment device expensive, and there is also a large loss of light. In the structure in which the provided joint portions are connected in a separable manner, there were defects such as the need for a complicated means for connecting the optical fibers.

J This invention improves the drawbacks of the conventional ones as described above, and is constructed so that the light bulb serving as the light source can be easily replaced.This invention will be explained below based on the embodiments shown in the drawings. .

This dental treatment instrument is composed of a main body A having, for example, a driving part driven by pressurized air at its tip, and a joint member B having a flexible hose attached to its rear end. The main body A is formed by a shaft cylinder 5, and an optical fiber 1 whose tip extends to the tip of the main body A is located inside the shaft cylinder 5.
The rear end is held by the holding member 3 at the q-center position, and a fitting is provided that leads out the piping systems 2, 2 for water supply and air supply to the front, and communicates the rear interior with the piping systems 2, 2. A fitting cylinder 4 having a fitting recess 4a is provided. The fitting recess 4a has a small diameter through hole 4b extending along the axis at its tip, and the rear end of the optical fiber 1 faces into the through hole 4b. Further, a thin protrusion ring 4c is extended from the rear end of the fitting cylinder 4, and a connecting cylinder 6 is provided on the outer periphery of the ring 4c concentrically with the fitting cylinder 4. It is fixed to the shaft cylinder 5 by a tightening ring 7 screwed onto the inner periphery of the rear end, and the connecting cylinder 6
An annular groove 6a is formed around the outer periphery of the ring. On the other hand, the joint member B has a circumferential groove 8 formed at a suitable position on the outer periphery, and an air-liquid tight O-ring 9 is fitted into the circumferential groove 8 to fit into the fitting recess 4a of the main body A.
An insertion cylinder 10 whose front half is rotatably fitted and connected inside the insertion cylinder 10, and a connecting cylinder 6 of the main body A which is provided concentrically on the outer rear half of the insertion cylinder 10 and which is thinner than the insertion cylinder 10 at the front. A retaining ring 11 having an inner diameter slightly larger than the outer diameter is attached to an outer intubation tube 12 having a thin mounting ring 1 protruding from the rear thereof, and an outer intubation tube 12 between the outer intubation tube 12 and the insertion cylinder 10. The connecting tube 6 is located within the gap and is slidable in the axial direction.
a slide ring 13 having approximately the same thickness, an operating ring 14 held in the outer intubation tube 12 so as to be slidable in the axial direction so as to surround the retaining ring 11, and a rear portion of the outer intubation tube 12. The cover ring 15 is screwed onto the cover ring 15.

The operating ring 14 and the slide ring 13 are always urged forward by coil springs 16 and 17, respectively, and the distal end holding ring 11 of the external tube 12 has a plurality of through holes 18 in the circumferential direction. This through hole 18
A steel ball 19 having a diameter larger than the wall thickness of the outer tube 12 is fitted and held in each of the outer tube 12, and normally the steel balls 19 are in contact with the outer peripheral surface of the slide ring 13 located inside the outer tube 12. It is pushed outward.

4. The operating ring 14 located on the outside of the front half of the external intubation tube 12 has a large diameter portion 20 with an enlarged inner diameter formed on the inner peripheral surface of its front end, and this large diameter portion 20 is connected to a small diameter portion via an inclined stepped portion 21. It is connected to section 22. Normally, the inclined stepped portion 21 is pushed up by the slide ring 13 and comes into contact with the exposed portion of the copper ball 19 received in the large diameter portion 20 due to the elasticity of the coil spring 16, whereby the operating ring 14 is prevented from detaching forward from the outer 7 intubation tube 12. Further, the rear end of the slide ring 13 has an inner flange 23 that protrudes inward, and this inner flange 23 normally serves as a stopper ring 24 provided on the outer periphery of the insertion cylinder 10.
It comes in contact with and prevents it from coming off forward. 9 Inside the insertion cylinder 10, there are provided an air supply path 25 and a water supply channel 26 that open at the tip thereof and communicate appropriately with the piping system 2 of the main body A, and a power cord provided in the center. 27
Seven insertion holes 28 communicate with fitting recesses 29 formed at the distal end of the insertion cylinder 10.

Inside this fitting recess 29 is a cylindrical housing 32 whose tip fits into the through hole 4b of the fitting cylinder 4 of the main body A via an O-ring 31 in a groove 30 provided on the outer peripheral surface. The rear end portion is located inside the rear end of the housing 32, and an insulating material 3
A cylindrical contact 34 is provided through the power cord 27 through the hole 2, and a part of the rear part of the contact 34 is connected to the hole 2 for inserting the power cord 27.
8 and also inside this contact 34.
A cylindrical contact 36 is provided concentrically through the contact 3.
6 also extends into the hole 28 for inserting the power cord 27. A lamp cartridge 37 is inserted into the housing 32, and the lamp cartridge 37 is a hollow cartridge body whose outer diameter is slightly smaller than the inner diameter of the housing 32 and whose front end is open. A bush 39 is disposed at the rear of the bush 38 and is made of an insulating material, the rear end of which has the same outer diameter and which fits into the hollow of the trigger body 38 at the tip end, and protrudes from the rear end of the bush 39. At the same time, a cylindrical contact 40 that can be fitted into the contact 34 is provided, and the rear end of the contact 40 is connected to the contact 4 through an insulating material 41.
A columnar contact 42 is provided that protrudes from the rear end of the housing 32 and can be fitted into the contact 36 in the housing 32. Also, a light bulb 43 is provided inside the front end of the cartridge body 38.
is arranged, and one end of the filament of the light bulb 43 is connected to the contact 40, and the other end of the filament is connected to the contact 42. The lamp cartridge 37 configured in this way is connected to the cartridge body. The housing 32 is inserted into the housing 32 such that the tip of the housing 38 protrudes from the tip of the housing 32. Note that 44 is a water supply connector connected to the water supply channel 26, to which the water supply hose 4 is connected.
5 is connected.

Reference numeral 46 denotes an air supply connector connected to the air supply path 25, and an air supply hose 47 is connected to this.

Reference numeral 48 denotes a flexible hose connected to the attachment ring 1'' of the external intubation tube 12, and the hoses 45 and 47 and the power cord 27 are provided inside.

49'' is a stopper 1 provided at the rear of the small diameter portion 21 of the operating ring 14.

When the main body A is removed from the joint member B, the slide ring 13 moves forward by the coil spring 17 and pushes the steel balls 19 outward, and the steel balls 19 are pushed into the large diameter portion 20 of the operating ring 14. positioned.

First, attach the lamp cartridge 3 to the tip of the joint member B.
7, from the state shown in FIG. 3, insert the lamp cartridge 37 into the housing 32 with its contacts first, and as shown in FIG.
The contacts 40 of the lamp cartridge 37 fit into the contacts 34, and the contacts 42 of the lamp cartridge 37 fit into the contacts 36, thereby electrically connecting them. From this state, connect body A to joint member B.
When connecting to the fitting recess 4a, the insertion cylinder 10 is pushed into the fitting recess 4a. Then, the connecting tube 6 presses the slide ring 13 against the coil spring 17, and the copper ball 19 falls into and engages the annular groove 7 provided in the connecting tube 6, and the inclined stepped portion 21 of the operating ring 14 Since it is removed from the steel ball 19, the operating ring 14 is moved forward by the coil spring 16 to the small diameter portion 22.
This presses the outer surface of the steel ball 19, thereby ensuring the engagement between the copper ball 19 and the annular groove 7, and the stopper 49 coming into contact with the copper ball 19. In this way, the insertion tube 10 is rotatably fitted into the fitting tube 4 via the O-ring 9, and the outer tube 12 is rotatably connected to the connecting tube 6 via the steel ball 19. Furthermore, within the through hole 4b, the rear end of the optical fiber 1 and the front end opening surface of the lamp cartridge 37 face each other. The pressurized air from the air supply hose 47 flows through the air supply path 25, and the water from the water supply hose 45 flows through the water supply path 2.
6 to the main body A, and the light from the light bulbs 43 turned on via the power cord 27 passes through the optical fiber 1 and reaches the tip of the main body A, illuminating the affected area in the oral cavity. .

Next, when separating the main body A from the joint member B, pull the operation ring 14 backward against the coil spring 16, and the steel ball 1
9 faces the large diameter portion 20, and when the main body A is pulled forward from this state, the engagement between the steel ball 19 and the annular groove 7 is released, and the main body A can be pulled out.

With this pulling operation, the slide ring 13 is moved forward by the coil spring 17 and pushes up the copper ball 19 again with its outer peripheral surface, and the steel ball 19 and the inclined stepped portion 21 come into contact with each other while the operation ring 14 is retracted. The fitting cylinder 4 and the insertion cylinder 10 are now in a state where they can be fitted. When the main body A and the joint member B are separated, at the tip of the joint member B,
As shown in FIG. 2, since the tip of the cartridge body 38 protrudes from the tip of the housing 32, the bulb 43
When replacing the cartridge, the protruding tip of the cartridge body 38 is grasped and pulled out from the housing 32.

As described above, the present invention includes an optical fiber on the main body side and a lamp cartridge for supplying light on the joint member side, and the lamp cartridge is inserted into the housing such that the tip of the cartridge main body protrudes from the tip of the housing. Since the lamp cartridge is inserted into the cartridge body, the lamp cartridge can be easily attached and detached from the joint member by grasping the tip of the cartridge body, which is extremely convenient for replacing light bulbs.In addition, the light bulb is protected by the cartridge body. It is convenient to handle, the optical fibers can be short, there is little light guide loss, and the structure of the light guide system is simple, making the product inexpensive and providing good lighting effects. have

[Brief explanation of the drawing]

5 The drawings show an embodiment of the present invention, FIG. 1 is a longitudinal sectional view showing a connected state, FIG. 2 is an enlarged longitudinal sectional view of the connecting part between the joint member and the lamp cartridge, and FIG. 3 is FIG. 2. Fig. 4''0 is an enlarged longitudinal cross-sectional view showing a separated state in which the lamp cartridge is slightly moved from the state shown in Fig. 4'', and Fig. 4'' is a side view of the lamp cartridge.

Claims (1)

[Scope of Claims] 1. Consisting of a therapeutic instrument main body that is detachable and rotatably coupled when attached, and a joint member, and the therapeutic instrument main body is arranged in the rear part of the shaft cylinder and internally aligned with the axis. a fitting recess extending along the front end with a through hole communicating with the front end and opening at the rear end; a fluid piping system communicating with the fitting recess and extending in the distal direction; and a fluid piping system extending in the distal direction with the rear end facing into the through hole. A coupling member connected to the treatment instrument main body has a fluid passage therein that communicates with the piping system of the main body and connects a supply hose to the rear end thereof, and the fitting member is connected to the fitting recess. An insertion cylinder to be fitted, a cylindrical housing whose rear end fits into a fitting recess provided at the tip of the insertion cylinder, and a cylindrical housing interposed inside the rear end of the housing, a contact point connected to a power cord led into the body, and a contact point of the light bulb connected to the contact point protrudes from the rear end of a cylindrical cartridge body having a light bulb inside the housing. The lamp cartridge is inserted so that the tip of the cartridge body protrudes from the tip of the housing, and when the joint member to which the lamp cartridge is attached is connected to the treatment instrument body, the light guide system is inserted into the through hole. A dental treatment instrument characterized in that the rear end face and the front end opening of the cartridge body are configured to face each other. 2. The dental treatment instrument according to claim 1, wherein the piping system and fluid passage are two systems, one for pressurized air and the other for water.