JPS5822728Y2 - Attaching and detaching device for dental handpiece - Google Patents

Description

[Detailed description of the invention] The present invention provides a dental handpiece with a circumferential groove on the outer periphery of a connecting tube protruding from the rear end of the handle of the handpiece having an air turbine head, and a joint in the circumferential groove. By engaging the sphere fitted in the hole provided on the outer periphery of the front end of the member via the operating tube that is pressed forward by a spring, and then retracting the operating tube and pulling out the joint member, the circumference of the connecting tube is removed. In addition to releasing the engagement between the groove and the sphere, the slide inner tube prevents the sphere from protruding toward the inner surface of the joint member, so that the next connection between the grip handle and the joint member can be easily and quickly performed. This invention relates to an attachment/detachment device for a dental handpiece.

For dental treatment, multiple handpiece handles with drills of a predetermined shape attached to the head are prepared in advance, and these are attached to the dental unit or the handpiece installed on the treatment chair depending on the type of treatment. It is used by connecting the joint hose cover appropriately, but the connection between the rear end of the handle of the handpiece and the front end of the joint hose cover is usually made by directly screwing the male and female threads of each other. Moreover, since the pitch of the screw threads is narrow, the work of replacing the handle portion with respect to the joint hose cover is extremely cumbersome and time consuming, making it extremely inconvenient to use.

Therefore, the present invention was devised to eliminate the drawbacks of soft soil, and this will be explained in detail below with reference to drawings as an example.
The whole body is composed of a grip part A having an air turbine head 1 at its tip, and a joint member B having a threaded part 2 for attaching to a joint hose cover at its tail end.

The handle portion A is provided with a piping system 3 for water supply and air supply and exhaust in the front interior, and a fitting portion 4 communicating with the piping system 3 in the rear interior.

A fitting cylinder 5 and a concentric connecting cylinder 6 are protruded from the rear of the fitting part 4, and an annular groove 7 is formed on the outer periphery of the connecting cylinder 6. An exhaust passage 8 is formed between the cylinder 5 and the connecting cylinder 6.

On the other hand, the joint member B has an insertion cylinder 9 that fits into the fitting part 4 of the handle part A protruding from its tip, has a piping system 10 for water supply and air supply and exhaust inside thereof, and has a piping system 10 outside the insertion cylinder 9. , an external intubation tube 1 having an inner diameter approximately equal to the outer diameter of the connecting tube 6 of the handle portion A is provided.
1, and on the outside of the outer tube 11, there is an operation tube 12 that is slidable in the axial direction, and between the insertion tube 9 and the outer tube 11, there is an operation tube 12 whose diameter is approximately the same as that of the connecting tube 6 of the handle part A. Slide inner tubes 13 that are equally slidable in the axial direction are provided respectively.
4', a plurality of through holes 15 are formed in the circumferential direction at the distal end of the external intubation tube 11, and steel balls 16 are fitted into each of the through holes 15. and
Normally, even if the steel ball 16 comes into contact with the slide inner tube 13 located inside the outer tube 11 and is pushed outward, the operation tube 12 located outside the outer tube 11 has a large diameter on the inner surface of its front end. It has an enlarged large diameter part 17, and this large diameter part 17 is connected to a small diameter part 18 via an inclined stepped part 19, and this small diameter part 1
An annular flange 2 is provided at the rear end of 8 to protrude inward, and the inner diameter of this annular flange 20 is approximately equal to the outer diameter of the outer tube 11, so that the annular flange 20 contacts the exposed portion of the steel ball 16. There is also an inner flange 21 that protrudes inward at the rear end of the slide inner tube 13 so that the operation tube 12 does not come off from the outer intubation tube 11.
The inner flange 21 comes into contact with a stopper ring 22 provided on the outer periphery of the insertion tube 9 to prevent it from coming off in the axial direction.

Furthermore, an exhaust hole is formed in the inner flange 21, and compressed air after use is discharged to the atmosphere through the exhaust hole 23.

When the handle A and the joint member B are removed, the slide inner tube 13 pushes the steel ball 16 outward, as shown in FIG. Part 1
7, and when connecting the grip handle A and the joint member B from this state, when the insertion tube 9 is inserted into the fitting section 4, the connecting tube 6 connects the slide inner tube 13 with the coil spring 14'.
The steel ball 16 is pressed against the annular groove T provided in the inner tube 13.
At the same time, the steel ball 1 is disengaged from the inclined stepped portion 19 of the operating barrel 12 and pushed up by the small diameter portion 18.
6 does not come out of the through hole 15, and both are rotatably connected.

When separating the grip handle A and the joint member B, use the operation tube 12.
When the steel ball 16 is pulled backward against the coil spring 14, the steel ball 16 faces the large diameter portion 17, and therefore the insertion tube 9 can be pulled out from the fitting section 4, and as the insertion tube 9 is pulled out, the inside of the slide Since the tube 13 moves forward and receives the steel ball 16 on its outer peripheral surface, the steel ball 16 does not protrude from the inner surface of the outer tube 11, and the operation tube 12 remains retracted and waits.

Therefore, according to the present invention, the handle portion equipped with the air turbine head and the joint member can be quickly connected and disconnected by an extremely simple operation, and the connection state is reliable. It has the advantage that it is extremely convenient to use because the connection operation can be performed in that state without the need to once retract the operation tube and position the steel ball in the large diameter portion of the operation tube each time.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is an overall side view, Fig. 2 is a longitudinal sectional side view of the main part of the handle, and Fig. 3 is a longitudinal sectional side view of a part of the joint pipe. FIG. 4 is a longitudinal sectional view of the connected state. Figure sleep#'! Grip handle part, B is a joint member, 1 is an air turbine head, 2 is a threaded part, 4 is a fitting part, 5 is a fitting cylinder, 6 is a connecting cylinder, 7 is an annular groove, 9 is an insertion cylinder, 11 is an outer Intubation, 12 is the operation tube, 13 is the slide inner tube, 14.14' is the coil spring,
15 is a through hole, 16 is a steel ball, 17 is a large diameter portion, and 18 is a small diameter portion.

Claims (1)

[Scope of utility model registration request] An air turbine head is provided at the tip, a piping system is formed inside and a fitting part is formed at the rear end, and a fitting cylinder and a connecting cylinder are concentrically protruded from the rear end and are attached to the outer periphery of the connecting cylinder. The handle has a grip portion formed with an annular groove and an insertion tube that is fitted into the fitting portion having a piping system inside at the front end, and an external intubation tube is provided on the outer periphery of the front end, and an insertion tube is provided on the outer periphery of the front end. A steel ball that engages with the annular groove is fitted into the through hole, and the inner periphery of the outer tube is constantly pressed in the direction of the front end to push the steel ball outward, and the insertion tube is fitted into the fitting part. a slide inner tube that is pushed rearward by the connecting tube when the connection tube is inserted, and a large diameter section on the outer periphery of the outer tube that receives the steel ball that is pushed outward through an inclined step on the surface between the front ends. A dental clinic characterized in that it is composed of a joint member in which a small diameter part that presses the steel ball inward is connected to an operating cylinder that is always pressed forward, and each joint member is arranged so as to be slidable in the axial direction. attachment/detachment device for handpieces.