JPS60241431A - Connection mechanism in dental treatment instrument - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present application relates to a connection mechanism for rotatably connecting a main body of a dental treatment instrument and a joint member from which a flexible hose is led out.

Conventional Technology and Problems Conventional dental endpieces or dental cylinders 2, etc., used in dental treatment consist of a main body of a treatment instrument and a device connected to a dental unit or treatment chair to supply fluid and electricity to the main body of the treatment instrument. and a coupling member having a flexible hose,
These are rotatably connected to the attachment/detachment hook via the connector 41I so that the flexible hose does not twist during treatment or the treatment is restricted by the twisting action, but the connection mechanism includes: For example, Utsukai 51
As shown in Japanese Patent No. 99994, the body of the therapeutic instrument to be connected is provided with a fitting cylinder having an annular groove formed on the outer surface of the end, and the outer circumference of the fitting cylinder is provided at the joint part. a retaining ring that fits into the retaining ring; a steel ball that is fitted and held in a plurality of through holes provided in the circumferential direction of the retaining ring and has a diameter larger than the thickness of the retaining ring; A connection mechanism is known in which the steel ball is provided with a slidably operating ring having a small diameter portion for pressing the steel ball inwardly, and the steel ball is merged into the annular groove in the connected state.

However, according to the configuration described above, in the unconnected state, the operating ring is pressed by the tin ring and presses the steel ball inward, so in this state, the fitting cylinder cannot be inserted into the retaining ring. When attempting to connect the main body and the coupling member by fitting, the operating ring must be slid against the spring, and in this state the fitting cylinder must be inserted into the retaining ring. The same applies to the case where the main body is removed from the joint member, and the operation of attaching and detaching the instrument main body and the joint member is extremely inconvenient for use.

OBJECTS, EMBODIMENTS, AND OPERATIONS OF THE INVENTION The present invention improves the deficiencies of the above-mentioned conventional devices, and examples thereof will be described below based on the drawings. The dental treatment instrument shown in the embodiment includes, for example, a main body A having a drive unit driven by pressurized air at its tip, and a joint member B having an additional flexible hose attached to its rear end. As shown in FIG. 2, the main body A is formed by a shaft cylinder (5), and inside the rear end of the energizing cord (1), the rear end of which extends to the distal end of the main body A is located at a central position. Holding member (3
), and the piping systems f2+ and 12+ for water supply and air supply are led out for assistance, and a fitting recess (4-) communicating with the piping systems (21, +21 A cylindrical body (41 is provided. The fitting recess (4-) has a small diameter through hole (4-) extending along the axis at the tip thereof.
4To, a conductive terminal (1)' connected to the energizing cord (1) is provided in the through hole (4)b,
Further, at the rear end of the fitting cylinder (41), a thinly formed protrusion ring (41c) is extended, and a connecting cylinder (6) is provided concentrically with the fitting cylinder (41) on the outer periphery of the protrusion ring (41c). , these are the tightening ring InK screwed onto the inner periphery of the rear end of the outer cylinder (5).
Therefore, it is fixed to the shaft cylinder (5), and an annular groove (6) & is formed around the outer periphery of the connecting cylinder (6).

On the other hand, as shown in FIG. 3, the joint member B has a circumferential groove (8) formed at a suitable location on the outer periphery, and an air-liquid tight O-ring (9) is fully fitted into the circumferential groove (8). An insertion cylinder (1α) whose front half is rotatably fitted and connected in the fitting recess (3) of the main body A, and an insertion cylinder (1α) provided concentrically on the outer rear half of the insertion cylinder 0α, The retaining ring 11 is thin and has an inner diameter slightly larger than the outer diameter of the connecting tube (6) of the main body A,
A thin extension ring (lit') is formed at the rear and protrudes from the multiplication intubation tube (121), and the outer intubation tube (121) is located in the gap between the insertion tube 0 and slides in the axial direction. A slide ring 03' that is movable and has approximately the same thickness as the connecting tube (6), and a retaining ring 11 on the outer nva'z.
The operating ring α4 is slidably held in the axial direction so as to surround the outer tube 11, and the cover ring is screwed to the rear of the outer tube (121).

The operation ring C141 and the slide ring q3 are always urged forward by the coil spring (171), and one tip retaining ring (111 has a plurality of rings in the circumferential direction). A through hole is opened, and steel balls 9 having a diameter larger than the wall thickness of the external tube az are fitted and held in the through hole Q8. It comes into contact with the outer peripheral surface of the slide ring U located at and is pushed outward.

Said external intubation I: i? The operation ring (14I) located on the outside of the front half of the operation ring (14I) has a large diameter part (■) formed by enlarging the inner diameter on the inner peripheral surface of its front end, and this large diameter part (■) is connected to the small diameter part through the inclined step part 121. They are installed consecutively. And usually the inclined stepped portion C! υ is pushed up by the slide ring 03 and comes into contact with the protruding part of the steel ball I received in the large diameter part φ due to the elasticity of the coil spring aO, and as a result, the operating ring (1
41 is prevented from separating forward from the external intubation tube (121).The rear end of the slide ring a3 has an inner flange θ that protrudes inward, and the inner flange θ is normally inserted. It comes into contact with a stopper ring α) provided on the outer periphery of the cylindrical body Oe to prevent it from coming off forward.

Inside the insertion cylinder (101), there are provided an air supply path j and a water supply channel 4 which are open at the tip and communicate with the piping system (2) of the main body A as appropriate), and a power cord is installed in the center. A hole for insertion is provided, and a preliminary conductive end protruding from the tip thereof is connected to the power cord and is in a male-female relationship with the conductive terminal (11'). Note that (to) is a water supply connector connected to the above-mentioned supply channel (C), and the water supply hose ω' is connected to this. (3) 1 is an air supply liquid reservoir connected to the above-mentioned air supply channel (■) The air supply hose 01)' is connected to this. 03 is a flexible hose connected to the mounting ring a11' of the external tube (1?), and each hose ■' and G1)' and the power source are connected inside. A cord is built in. The east side is operated by a stopper installed at the rear of the small diameter part si 1 of the 14+.

When the main body A is removed from the joint member B, as shown in FIG. When connecting the main body A to the joint member B from this state, insert the inserted cylinder α into the fitting part (3).
Push in. Then, the connecting tube (6) is attached to the slide ring tl.
:l The coil presses against the spring t171, and the steel ball port 9 falls into and engages the annular groove (7) provided in the connecting tube (6), and the inclined stepped portion t21+ of the operating ring (141) Since it is removed from the steel ball a9, the operating ring 041 moves forward and the outer surface of the steel ball (19) is pressed by the small diameter portion (2), thus ensuring the engagement of the steel ball (a9) and the annular groove (7). Also, the stopper (T) comes into contact with the steel ball (2).In this way, the insertion cylinder 01 is rotatably fitted into the fitting cylinder (41) via the O ring (9), and the outer tube +13 is contact ff s
It is rotatably connected to f6+ via a steel ball a9, and a pair of conductive terminals (1)' and 2 are slidably connected within the through hole (JTo).

The pressurized air from the air supply hose Cγ is supplied to the main body A via the air supply path G, and the water from the water supply hose C11l' is supplied to the main body A via the water supply channel @, and the light is turned on via the power cord @. The light from the light bulb (to) is transmitted through an optical fiber (1
1t, 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 operating ring 41t backward against the coil spring surround, and the steel ball (1!
- When pulled forward, the engagement between the steel ball stud and the annular groove (7) is released, and the main body Ae can be pulled out. Along with this pulling operation, the slide ring (131 is a coil spring (171)
moves forward and pushes up the steel ball a9 again with its outer circumferential surface, and with the operation ring 04 retracted, the steel ball α9 and the inclined stepped portion (211) come into contact with each other, and the fitting tube is inserted into the machine shown in Fig. 3. body +4
1 and the insertion cylinder a1 become fitable.

In the above, it is noted that the main body All may be provided with an insertion cylinder sleeve, and the joint member Bg@ may be provided with a fitting recess (4)a, and furthermore, in the above, a retaining ring α] may be provided on the main body A side.
), steel ball (19, slide ring n3+, operation ring I
Of course, it is also possible to provide the springs (161, n71, respectively) and the connecting tube (6) having the annular groove (61a) on the joint member B side.

Effects of the Invention As described above, according to the present application, when the operation ring is fully slid and the main body and the joint member are separated, the steel balls pressed inward by the slide ring are exposed to the inner periphery of the operation ring. The small diameter section provided locks and prevents the operating ring from restoring.
When connecting the main body to the joint member from the position of the housing, the length of the mating cylinder is such that it can be inserted into the retaining ring, and the steel ball and the annular groove are engaged. It is extremely convenient to use because it can be attached and detached from the joint member very easily.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; Fig. 71 is a longitudinal sectional front view showing a connected state, Fig. 2 is a longitudinal sectional front view showing a part of the main body, and Fig. 3 is a partially longitudinal sectional front view showing a joint member. It is a diagram. In the drawings, A is a different body of the treatment device, B is a joint member, (1
) is the energizing cord, (1)′ is the conductive terminal, (41 is the fitting cylinder, (5) is the shaft cylinder, (61 is the connection cylinder, (71 is the annular groove,
H is the insertion cylinder, 011 is the retaining ring, a1 is the mounting ring, 02 is the external tube, 031 is the slide ring, 041 is the operation ring, (161, Q7+ is the coil spring, (18 is the through hole, 0 is the steel ball) , the kiln is the large diameter part, Gl+ is the sloped step part, (
221 is the small diameter part, ■ is the air supply path, ■ is the water supply channel, @ is the power cord, (c) is the conductive terminal, 艷′ is the water supply hose, C311
' is an air supply hose, and r3z is a flexible hose. Patent applicant: Yoshida Seigaijun Co., Ltd.

Claims (1)

[Claims] A fitting cylindrical body having an annular groove formed on the outer circumferential surface of the end is provided on one of the instrument body and the joint member to be connected, and the other member is fitted with the outer periphery of the fitting cylindrical body. a retaining ring, a steel ball that is fitted and held in a plurality of through holes provided in the circumferential direction of the retaining ring and has a diameter larger than the thickness of the retaining ring; A connecting device 11 for a mycological treatment instrument comprising a slidably operating ring having a small diameter portion that presses the steel ball inward, and engaging the steel ball in the annular groove in a connected state, The inner periphery of the retaining ring is always pressed toward the end to press the steel balls outward in the unconnected state, and is suppressed by the fitting cylindrical body to keep the steel balls in the suppressed state when connected. A connection mechanism in a dental treatment instrument characterized by a slidable slide ring.