JPH0136497Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is connected to the rear of a treatment instrument (hereinafter referred to as an instrument) used for dental treatment or other medical treatment, and is supplied with a medium (hereinafter referred to as a medium) such as compressed air, water, electricity, etc. Regarding the improvement of a winding drum device for a flexible connecting pipe (hereinafter referred to as a hose) that incorporates a supply pipe in the axial direction of the body, the improvement is that a media coupling means is stored inside the hose winding drum. Therefore, it is aimed at enabling a compact device assembly and allowing easy replacement of various treatment instruments, hoses connected thereto, and hose winding sections.

Taking dental treatment as an example, the hose at the rear of a well-known handpiece supplies the handpiece with compressed air for driving a turbine, electric power for driving a micromotor, etc.
A supply pipe for media such as cooling water to prevent heat generation at the cutting site is built into the body axis, and the handpiece is pulled out to the required length and locked to maintain that length, and is automatically rolled up after the treatment is completed. The medium is constantly supplied to the handpiece during such hose feeding and feeding operations, and conventionally this medium is connected between the supply side and the load side. In order to do this, a separate coupling means from the hose feeding/feeding device including the hose winding drum was applied, which resulted in a large number of parts in the media supply system, which resulted in cost reductions in terms of space and maintenance. I was at a disadvantage from above.

The present invention is aimed at eliminating these disadvantages, and the general solution is to install a media rotary device inside the hose take-up drum that does not cause poor connections even when the hose is fed in and out. The purpose is to incorporate the means of connection. In a preferred embodiment, a hollow space inside the hose take-up drum includes a cylindrical connecting piece and a cylindrical support shaft which is held in a relative rotational relationship with the hose take-up drum 1 and is fitted over the connecting piece. A passage for a medium other than electricity is provided in communication between the connection piece and the support shaft, and the electric medium is connected to the ring electrode terminal which is fitted and fixed to the support shaft. The winding drum, the connection piece, and the sliding electrode terminal are connected by contact with a sliding electrode terminal fixed to the inner wall of the drum, and the winding drum, the connecting piece, and the sliding electrode terminal are configured to rotate relative to each other with the support shaft and the ring electrode terminal on the fixed side. ing. A preferred embodiment of the present invention will be described in detail below with reference to the drawings.
2 is an enlarged cross-sectional view taken along the line -- in FIG. 1, FIG. 3 is an exploded perspective view of only the connecting block, and FIG. 4 is an enlarged end view taken along the line -- in FIG.

As shown in the figure, the embodiment device includes a cylindrical connection block 2 in the hollow space of the hose winding drum 1 and a cylindrical support shaft 3 which is rotatably maintained relative to the cylindrical connection block 2 and is fitted into the rear part of the connection block 2. Winding drum 1
Internal passages 210, 220, 230 for media other than electricity, which do not lose mutual communication even when the two are rotated relative to each other, are installed inside the connecting block 2 and the support shaft 3 in a substantially coaxial manner. and corresponding internal passages 310, 320, 330, . The ring electrode terminal 5 is inserted into the ring electrode terminal 5, and both terminals 6, 5 are connected to each other.
are kept in constant contact, the winding drum 1 is placed on the rotating side, and the cylindrical support shaft 3 is placed on the stationary side, and the winding drum 1 is given restoring elasticity in the hose winding direction by a coil spring 14. Furthermore, the internal passages 310, 320...210,
Supply and derivation of medium other than electricity regarding 220... and the ring electrode terminal 5 and sliding electrode terminal 6
The invention is characterized in that electricity is appropriately supplied and derived.

In the above configuration, the internal passages 210 and 310 are aligned on a straight line along the longitudinal direction, and the internal passage 22
0 is a circumferential groove 320 provided in the support shaft 3 with an opening 2201 in the circumferential direction from the middle of the connecting piece 2.
The internal passages 230 and 330 are similarly opened to the opening 2301 and the circumferential groove 3301, and these circumferential grooves 3201 and 3301 are connected to the watertight/airtight packing 2.
4, 25, and 26. This ensures the continuity of each passage even through rotation. The sliding electrode terminal 6 has three electrode pieces 61 along the inner circumference of the end of the drum 1 as shown in FIGS. 1 and 2.
00, 6200, 6300 are electrically insulated and fixed in parallel, and each electrode piece 6100, 6200, 6300...
Spring contact pieces 610, 620, and 630 are connected in the circumferential direction of the electrode terminal 6, and each contact piece has a pair of contacts 6.
The electrode terminal 6 is fixed to a disk 7 fixed to the winding drum 1 with a mounting screw 65. On the other hand, the ring electrode terminal 5 has ring-shaped electrode pieces 51, 52, 53.
are connected in a horizontal column shape with a ring-shaped insulator 54 sandwiched between them, and each electrode piece 51, 52, 53 has input wires 6101, 6201, 6 supplied from a power source (not shown).
301 are insulatively connected to each other and fixed to the support shaft 3 with a mounting screw 55.
As shown in Fig. 2, the terminal connector 30 has three connection nozzles 311, 321, 331 on the hollow side and one on the outside.
Three connection short pipes 31, 32 in the main outlet pipe 34,
33 is housed coaxially, and the connection block 2
The electrode piece 610 is connected by a continuous hose (not shown) to the connection nozzles 21, 22, 23 attached to the entrances of the passages 210, 220, 230...
Lead wire from 0,6200,6300 (not shown)
is connected to this terminal connector 30 and the connector 30
It is connected to an electrical connector (not shown) while being attached externally. The terminal connector 30 is connected to the medium supply pipe for compressed air, water, mist, and electricity inside the hose at the end of the hose wound around the winding drum 1, and is separate from the medium supply source and the device of the present invention. terminal connector 4
Connected at This connector 4 is fitted onto the end of the support shaft 3 as shown in FIGS.
10, 420, 430, and the opening 410 is bent.
Connection nozzle 4 for introduction from 1,4201,4301
1, 42, and 43. Connection block 2
A ball bearing 9 is interposed between the connecting block 2 and the support shaft 3, and the connecting block 2 is connected to the mounting disc 7 by means of a mounting screw 72, which is connected to the end plate disc 11 by means of another mounting screw 71. The disk 11 is fitted into a recess 100 at the end of the winding drum 1. The support boss 16 is immovably connected to the mounting rotating plate 18 by a mounting screw 17, and a coil spring 14 is built in the recess 100, and the terminal end of the coil spring 14 is connected to the support boss 16 by a mounting screw 15. The tip is fixed to the inner wall of the end plate disk 11, and another ball bearing 19 is interposed between the end plate disk 11 and the support boss 16. Reference numeral 13 in FIG. 2 is a cover for the coil spring 14, which is connected to the disk 11 by a mounting screw 12. Further, reference numeral 8 denotes a hose guide plate fixed inside the winding drum 1, which allows hoses (not shown) to be inserted into the through holes 81, 82, etc. to properly connect the hoses to the connection nozzles 21, 22, etc. This prevents the hoses from tangling with each other and from contacting the electrode terminals 5).

The device of the present invention having the above configuration has a hose unwinding/stopping/winding mechanism (not shown), which locks the hose h to maintain its length after pulling out each treatment device to the length necessary for treatment. After finishing, the hose h is pulled out slightly, and the coil spring 14 is rapidly wound up by the restoring elasticity (the present applicant has filed a separate application for this mechanism). When the hose h is pulled out against the elasticity of the coil spring 14, the end plate disk 1 placed in a fixed relationship with the winding drum 1
1, mounting plate 7, connection block 2, sliding electrode terminal 6
is two ball bearings 19, with the support shaft 3, ring electrode terminal 5, and terminal connector 4 on the fixed side.
This rotation causes the coil spring 14 to contract and accumulate restoring elasticity. On the other hand, during this time, the passages 210, 220, 230 are also rotated.
330-430, the medium introduced into these passages is continuously supplied from the terminal fitting 30 into the hose h. On the other hand, power supplied from the sliding electrode terminal 6 which is in rotating and sliding contact with the ring electrode terminal 5 is also continuously supplied into the hose h via the terminal connector 31. aisle 210
-310, 220-320, and 230-330 are maintained in a mutually isolated relationship by gaskets 24, 25, and 26. Since the terminal connector 30 rotates together with the winding drum 1, its relative relationship to the hose h remains unchanged, so that the supply pipes for each medium to the hose h will not be twisted or tangled due to the above rotation. Of course, on the other hand, since the terminal fitting 4 does not rotate, the relationship of pipe connection with the supply side is also maintained immovably.

As described above, according to the device of the present invention, media such as compressed air, water, mist, etc., and electric power are transmitted between the connecting block and the support cylinder, which are fitted in a hollow space of the winding drum in a substantially coaxial relationship. Since the device is designed to maintain the connection relationship correctly even when the winding drum rotates, it eliminates the difficulty of using a separate connection device in conjunction with the winding drum device as in the past, making it more compact and cost-effective. It provides cheap profits.

Although the above explanation was about the flexible hose of a dental handpiece, the present invention also applies to hoses attached to other medical treatment instruments that have a built-in conduit for the necessary medium. It is obvious that both apply equally.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of the device of the present invention;
2 is an enlarged cross-sectional view taken along the line -- in FIG. 1, FIG. 3 is an exploded perspective view of only the connecting block, and FIG. 4 is an enlarged end view taken along the line -- in FIG. Explanation of symbols, 1... Hose winding drum, 2...
Connection block, 3... Support shaft, 4, 30... Terminal connector, 5... Ring electrode terminal, 6... Sliding electrode terminal, 9... Ball bearing, 14... Coil spring, 16... Support boss, 18... Mounting frame, 51, 52, 53... Ring-shaped electrode piece, 54
... Ring-shaped insulator, 61, 62, 63 ... Contact, 181 ... Frame, 210, 220, 23
0,310,320,330...Inner passage, 61
0,620,630...Spring contact piece, 6100,6
200,6300...electrode piece.

Claims (1)

[Claims for Utility Model Registration] 1. A cylindrical connection block 2 in the hollow space of the hose winding drum 1, and a cylindrical support shaft 3 which is rotatably maintained relative to this and is fitted into the rear part of the connection block 2. is installed almost coaxially with the winding drum 1, and inside the connecting block 2 and the support shaft 3 there is an internal passage for a medium other than electricity that does not lose mutual communication even when the two rotate relative to each other. 21
0, 220, 230... and corresponding internal passages 310, 320, 330... are provided inside along the axial direction, and the sliding electrode terminal 6 is fixed along the inner wall of the winding drum 1 to correspond to this. A ring electrode terminal 5 is fitted onto the support shaft 3 to keep both terminals 6 and 5 in constant contact, and the winding drum 1 is placed on the rotating side and the cylindrical support shaft 3 is placed on the stationary side. At the same time, the winding drum 1 is provided with restoring elasticity in the hose winding direction by a coil spring 14, and the internal passage 31
0,320...210,220... A hose for a medical treatment instrument, characterized in that it appropriately supplies and draws out a medium other than electricity regarding the ring electrode terminal 5 and the sliding electrode terminal 6. Winding drum device. 2 The sliding electrode terminal 6 has a plurality of electrode pieces 6100, 6200, 630 along the inner circumference of the drum 1 terminal.
0... are electrically insulated and fixed in parallel, spring contact pieces 610, 620, 630... are coupled to each electrode piece in the circumferential direction of the arc piece 60, and each contact piece has a pair of contacts 61, 62. , 63... are arranged opposite each other, and each of the electrode pieces 6100, 6200, 6300... is connected to the connecting tool 30.
The ring electrode terminal 5 is made up of ring-shaped electrode pieces 51, 52, 53... connected to each other in a horizontal cylindrical shape with a ring-shaped insulator 54 sandwiched between each electrode piece 51, 52, 53... The apparatus according to claim 1, which is connected to the power supply side. 3. The device according to claim 1 or 2, in which a ball bearing 9 is interposed between the connecting block 2 and the support shaft 3.