JPS6350594B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present application relates to a connecting device in a distribution system for fluids such as pressurized air and water, and in particular, the present invention relates to a connecting device in a distribution system for fluids such as pressurized air and water. The present invention provides a connection device for a fluid distribution system used in, for example, dental treatment instruments, which is easy to operate.

Generally, a dental handpiece has an air turbine driven by pressurized air built into the head, and a handpiece main body equipped with a flow path for pressurized air for driving and water for cooling the tooth cutting section inside. A joint member is connected to the rear end of a long flexible hose that houses pressurized air and water supply pipes, and in the case of dental syringes, pressurized air and water are simultaneously ejected from the tip of the dental syringe. The syringe body is equipped with an ejection nozzle and a heating heater that heats the pressurized air or water in addition to the pressurized air and water flow passages inside, and the pressurized air and water supply pipes and current-carrying conductors are attached to the syringe body. A joint member is connected to the rear end of a long flexible hose containing each of the teeth,
It is necessary for the two connected members to rotate relative to each other so that the flexible hose does not twist, and the handpiece body or the handpiece body has a different function or shape compared to the joint member that connects the flexible hose. It is necessary to replace the syringe body or replace the flexible hose for the dental unit or the like.

By the way, heretofore, for example, connection devices for dental handpieces have been proposed as disclosed in Japanese Utility Model Publications No. 11347-1987 to Publication No. 15196-1983, etc.
This known connection device has the disadvantage that the operation of attaching and detaching the handpiece body and the joint member is extremely troublesome, and the handpiece body cannot be easily replaced.
Furthermore, in the connection device shown in Japanese Utility Model Application Publication No. 56-11811, since a sphere is used, the rotational action at the connection part is performed smoothly, and the connection and removal operations of the connection part are easier than in the former device. Although this structure has the advantage of being easy to perform, it is troublesome to form a holding hole to hold the sphere so that it does not fall out of the joint tube when the handpiece body is detached from the joint member. Also, because the sphere is always kept partially protruding from the inner circumferential surface of the joint pipe due to the elasticity of the spring,
When inserting the connecting ring on the handpiece body into the joint pipe, it is necessary to push the coupler nut back against the spring again while inserting it, which not only makes the connection operation difficult, but also causes problems when the coupler nut is moved back. Since the sphere (the upper sphere) protrudes from the inner peripheral surface of the joint pipe due to its own weight, the connecting ring bumps against it and does not fit smoothly into the joint pipe, which is a problem that should be fully satisfied as a connecting device. It wasn't.

Therefore, the present application improves the defects of the conventional one, and the embodiment will be described in detail with reference to the drawings below.
A indicates, for example, one connecting member forming one of the members for leading out the handpiece body, the syringe body, or a flexible hose, and B indicates a joint for connecting the flexible hose to the handpiece body or the syringe body. The other connecting member for connecting the other flexible hose to the one member for leading out the member or the flexible hose is shown.

In the embodiment, one flexible hose 4a has inside thereof a supply pipe 1a for pressurized air, a supply pipe 2a for water, and a conductor 3a, respectively, and one flexible hose 4a corresponds to the supply pipes 1a, 2a and conductor 3a, respectively. FIG. 1 is a cross-sectional view of one of the connecting members A. This connecting member A has a shaft body 7 inside a hollow cylindrical body 6 having a connecting cylindrical part 5 protruding from the front end.
is inserted, and this shaft body 7 is tightened between a locking step 9 provided at the front end of the cylinder body 6 by a tightening ring 8 screwed onto the rear end of the cylinder body 6, and the cylinder body 6 is tightened. is fixed integrally to the The shaft body 7 extends in the axial direction and is open at the rear end, and has a small diameter portion 11, a medium diameter portion 12 with a larger diameter than the small diameter portion 11, and a large diameter portion 1 with a larger diameter than the small diameter portion 11.
A fitting recess 14 formed by sequentially communicating with 3 in the rear end direction.
a passage 16 having one end communicating with the medium diameter portion 12 and having a connecting pipe 15 for pressurized air at the other end; and a passage 16 having one end communicating with the large diameter portion 13 and having a water connecting pipe 17 at the other end. and a guide hole 20 which communicates with the tip of the small diameter portion 11 and has a conductive connector 19 therein, and the connecting pipe 15 has one of the pressurized air supply pipes. 1a, the one water supply pipe 2a is connected to the connection pipe 17, the one conductor 3a is connected to the conductive connector 19, and these supply pipes 1a, 2a and the conductor 3 are connected to each other.
One of the flexible hoses 4a, which is provided with a hose 4a inside, is attached to the connection cylinder portion 5. The shaft body 7
A support part 21 formed to be thinner than the outer diameter of the rear end is integrally provided so as to extend rearward from the rear end of the cylinder 6, and a fixing ring 23 having a collar 22 on the outer periphery is attached to the shaft body. 7 and the tightening ring 8.
A concave circumferential groove 24 is formed on the outer circumferential surface of the fixing ring 23 to fit a part of a sphere described later and guide the rolling movement of the sphere. FIG. 3 shows a sectional view of the other connecting member B connected to the one connecting member A configured as described above, and this connecting member B is connected to the fitting recess 14. It has a shaft member 33 in which an annular body 32 is fixed concentrically to a collar part 31 provided on the outer periphery of the rear end of the convex part 30. The fitting convex portion 30 is
It integrally has a small diameter shaft part 34, a medium diameter shaft part 35, and a large diameter shaft part 36 that fit into the small diameter part 11, medium diameter part 12, and large diameter part 13 of the fitting recess 14, respectively,
Further, the large diameter shaft portion 36 is extended so as to protrude further rearward from the rear end of the shaft body 33 when the fitting convex portion 30 is fitted into the fitting recess 14. Also, inside the fitting convex part 30 is a pressurized air passage 38 whose tip opens inside the medium diameter part 12 when the fitting convex part 30 is fitted into the fitting recess 14 and has a pressurized air connecting pipe 37 at its rear end. , a water passage 40 whose tip opens inside the large diameter portion 13 and has a water connection pipe 39 at its rear end; Through-holes 43 each having a conductor 42 having a conductive connector 41 connected to the connector 19 are provided, and the annular body 32 has an inner diameter at its front part that is equal to the outer diameter of the fixing ring 23. A retaining ring 45, which is slightly larger and has an outer diameter smaller than that of the annular body 32 and has a plurality of fitting holes 44 spaced apart in the circumferential direction and passing through the tip in the thickness direction, is also provided at the rear end. A connecting cylinder portion 46 having a smaller diameter than the outer diameter of the annular body 32 is integrally provided.

The connecting pipe 37 has the other pressurized air supply pipe 1b, the connecting pipe 39 has the other water supply pipe 2b, and the rear end of the electric conductor 42 has the other conducting wire 3b. The other flexible hose 4b, which is connected to each other and further includes the supply pipes 1b, 2b and the conducting wire 3b therein, is attached to the connection cylinder portion 46. An annular gap 47 corresponding to the height of the flange 31 is formed between the annular body 32, the inner circumferential surface of the series of retaining rings 45, and the outer circumferential surface of the large diameter shaft portion 36 of the fitting convex portion 30. A spring 48 and an operating ring 4 which is always pressed forward by the elasticity of the spring 48 are formed inside the spring 48.
9 is interposed. The operating ring 49 has an outer diameter equal to that of the fixed ring 23 and has a flange 49' at the rear end, which is a protrusion formed on the outer periphery of the large diameter shaft portion 36 of the fitting convex portion 30. ring 5
0 and forward movement is restricted. Further, a sphere 51 having a diameter sufficiently larger than the thickness of the retaining ring 45 is fitted and held in the fitting hole 44,
This sphere 51 is pushed outward by the outer peripheral surface of the actuating ring 49 in a state where the connecting member B is separated from the connecting member A. Furthermore, the annular body 3
An operating ring 52 is provided on the outer periphery of 2 so as to be slidable in the axial direction.
are fitted. A large-diameter first fitting portion 53 that allows the sphere 51 to fit in when the sphere 51 is pushed up by the operation ring 49 is connected to the inner circumferential surface of the tip end of the operation ring 52 via an inclined surface 54. The fitting recess 1 has a diameter smaller than that of the first fitting part 53.
4, the fitting protrusion 30 is fitted, and the sphere 51 is inserted into the circumferential groove 24.
A second fitting part 55 which holds the sphere 51 between the circumferential groove 24 when the sphere 51 is fitted into the circumferential groove 24 and a second fitting part 55 which has a smaller diameter than the second fitting part 55 and which holds the sphere 51 in the circumferential groove 24 when the sphere 51 is fitted into the circumferential groove 24 . 51, and a protruding ring 56 which restricts the forward protrusion of the operating ring 52 by contacting the operating ring 51. ring 52
A spring 58 is interposed to always press forward. Reference numeral 59 denotes a cover ring screwed onto the front end of the cylinder body 6 to cover the connection between one flexible hose 4a and the connection cylinder part 5, and 60 a cover ring which connects the other flexible hose 4b and the connection cylinder part 46. A cover ring 61 is threadedly connected to the annular body 32 to cover the connecting portion of the fitting convex portion 30, and a sealing member 61 is provided at a suitable position on the outer periphery of the fitting convex portion 30.

When both connecting members A and B are separated, as shown in FIG.
The sphere 51 is received in the first fitting part 53 in a retracted state against the curve 8, and the inclined surface 54
The operating ring 52 is prevented from moving forward.

Next, from this state, the fitting protrusion 30 is inserted into the fitting recess 1.
4, the fixing ring 23 presses the operating ring 49 against the spring 48 and enters along the inner peripheral surface of the retaining ring 45, and when the circumferential groove 24 reaches just below the sphere 51, the sphere 51 is automatically fitted into the circumferential groove 24 by the pressing down force caused by the elastic force of the spring 58 acting on the contact portion with the inclined surface 54, and at the same time, the inclined surface 54
1, the operating ring 52 moves forward, and the sphere 51
When the protruding ring 56 comes into contact with the protruding ring 56, its forward movement is prevented, and the sphere 51 is brought into contact with the second fitting part 55.
At this position, the fitted state between the sphere 51 and the circumferential groove 24 is maintained. That is, the structure is configured in the state shown in FIG. 3, in which both the connecting members A and B are relatively rotatably connected, and the passages 16 and 38 for pressurized air and the passage 1 for water are connected.
8 and 40 and the conductive connector 19 and the conductor 42 communicate with each other.

Next, when separating the connecting members A and B from this state, they are moved back against the spring of the operating ring 52 so that the first fitting part 53 faces the position of the sphere 51, and in this state, both the connecting members A and B are separated. , B in opposite directions, the state shown in FIGS. 1 and 2 is obtained.

In addition, although the embodiment described above has been described in which flexible hoses are connected to each other, in a dental handpiece, one of the connecting members A is the handpiece body and the other connecting member B is the flexible hose. (In this case, the conductive terminal 19
and conductor 42 are omitted), and if it is a dental syringe, one of the connecting members A is a syringe body and the other connecting member B is a coupling member with a flexible hose. It is what it is.

In addition, in the above case, there is a fitting recess 1 on one side of the connecting member A.
4 and a fitting protrusion 30 to be fitted thereto are respectively provided on the other connecting member B side. It goes without saying that the fitting recess 14 may be provided on the B side.

As described above, according to the present application, when the two connecting members are separated, the sphere is pushed outward by the operating ring, and the operating ring is placed in a retracted state, so when the two connecting members are connected, the fixed ring is In addition to smooth entry, the operating ring automatically advances to ensure that the connected state is maintained, making it extremely easy to connect and separate the two connecting members, especially if the connecting and disconnecting operations are not frequent. This invention is extremely useful as a fluid system connection device used in the field.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a sectional view of one connecting member, FIG. 2 is a sectional view of the other connecting member, and FIG. 3 is a sectional view showing the connected state of both connecting members. be. In the figure, A and B are connection devices, 1a, 1b, 2b, 2
b is a supply pipe, 4a, 4b are flexible hoses, 6
1 is a cylinder body, 7 is a shaft body, 11 is a small diameter portion, 12 is a medium diameter portion, 13 is a large diameter portion, 14 is a fitting recess, 15, 1
7, 37, 39 are connecting pipes, 16, 18, 38, 4
0 is a passage, 19 is a conductive connector, 23 is a fixing ring, 24 is a circumferential groove, 30 is a fitting convex portion, 32 is an annular body, 34 is a small diameter shaft portion, 35 is a medium diameter shaft portion, 36 is a large diameter shaft part, 41 is a conductive connector, 42 is a conductor, 44
is a fitting hole, 47 and 57 are voids, 48 and 58 are springs, 49 is an actuation ring, 51 is a sphere, and 52
53 is an operating ring, 53 is a first fitting portion, 54 is an inclined surface, 55 is a second fitting portion, and 56 is a protruding ring.

Claims (1)

[Claims] 1. One of the connecting members has a fitting recess that opens at the rear end or a fitting protrusion that protrudes from the rear end, and extends in the distal direction in communication with the fitting recess or the fitting protrusion. It has a fluid passage, a fixing ring that is concentric with the fitting recess or the fitting protrusion and projects rearward, and a circumferential groove is formed on the outer circumferential surface of the fixing ring, and the other connecting member includes: a fitting protrusion or a fitting recess that has a passage therein that communicates with the fluid passage of the one connecting member and is connected to a fluid supply pipe at the rear end thereof, and that fits into the fitting recess or the fitting protrusion; , a retaining ring is provided on the outer periphery of the rear end of the fitting convex portion or the fitting concave portion, extends forward so that a gap exists between the retaining ring, and has an inner diameter large enough to allow entry of the fixing ring. an annular body; a spherical body that is fitted and held in a plurality of fitting holes provided in the annular body and has a diameter larger than the thickness of the retaining ring; and a sphere located within the gap and having an outer diameter of the retaining ring. an actuating ring that is approximately equal to the inner diameter of the ring, has a thickness that is in contact with the end surface of the fixed ring, and is capable of moving forward to the position of the fitting hole; a spring that constantly presses the actuating ring in the forward direction; a first fitting part that is slidably fitted in the axial direction on the outer periphery of the body and that allows the sphere to fit when the sphere is pushed up by the outer circumferential surface of the actuating ring; a second fitting part that is connected to the first fitting part and which holds the sphere therebetween when fitted into the circumferential groove of the ring; and a protruding ring that is located at the rear of the second fitting part and comes into contact with the sphere. 1. A fluid system connection device comprising: an operating ring having a plurality of actuating rings; and a spring positioned in a gap formed between the operating ring and the ring and constantly pressing the operating ring forward. 2. The fluid system connection device according to claim 1, wherein the first fitting part and the second fitting part are connected by an inclined surface. 3. A fluid system connection device according to claim 1 or 2, wherein both connection members are provided with a fluid passage for pressurized air and a fluid passage for water, respectively. 4. The fitting recess consists of a small diameter part, a medium diameter part, and a large diameter part, and the fitting convex part consists of a small diameter shaft part, a medium diameter shaft part, and a large diameter shaft part, and the fitting convex part consists of a small diameter shaft part, a medium diameter shaft part, and a large diameter shaft part. Claims 1 and 2, wherein one fluid passage is communicated through the large diameter portion, and the other fluid passage is communicated through the large diameter portion.
A fluid system connection device according to item 1 or 3. 5. The fluid system connection device according to claim 1, 2, 3, or 4, wherein the outer diameters of both connecting members are approximately equal. 6 One of the connecting members is the handpiece body,
A fluid system connection device according to claim 1, 2, 3, 4 or 5, wherein the other connection member is a joint member. 7 Claim 1, wherein one connecting member is a syringe body and the other connecting member is a joint member.
The fluid system connection device according to item 2, item 3, item 4, or item 5.