JP3920069B2 - Dental hose - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dental hose, and more particularly, between a dental handpiece or a dental motor unit and a dental unit having a predetermined fluid supply source for the dental handpiece or the dental motor unit. The present invention relates to an interposed dental hose.
[0002]
[Prior art]
The dental hose used for dental handpieces equipped with an electric motor has a water supply tube, a tip air tube, an air tube for cooling the motor, an illumination wiring, and an electric wiring for rotating the electric motor. It is generally provided as an inner tube, and all these inner tubes are bundled by an outer tube.
In addition, in a dental hose connected to a dental handpiece equipped with an air turbine, an air supply tube that supplies pressurized air to rotate the air turbine, an exhaust tube that discharges the pressurized air, and a water supply tube In addition to the tube for chip air, wiring for illumination is provided as an internal tube.
[0003]
[Problems to be solved by the invention]
As described above, since many inner tubes are inserted in the outer tube of the dental hose, the inner tube is used when connecting the dental hose and the dental handpiece or the dental hose and the dental motor unit. May be twisted and the outer tube may become wrinkled, resulting in poor appearance. This is because the inner tubes are twisted separately, so that they are entangled, or the outer tube and each inner tube, or the inner tubes are not slid.
[0004]
The present invention focuses on the drawbacks of the prior art described above and is intended to solve this problem. The problem is that dental use can prevent the entanglement of the inner tube and the generation of wrinkles in the outer tube. To provide a hose.
[0005]
[Means for Solving the Problems]
In the present invention, a plurality of inner tubes as fluid passages or electric wires, an outer tube that bundles all of the inner tubes, and a plurality of fluids of a dental handpiece or a dental electric motor are respectively connected to the front ends of the inner tubes. A connector to be connected to the passage and the electric wiring; a positioning member slidably inserted in the outer tube to position the plurality of inclusion tubes and prevent the mutual positional relationship; and the connector A connector ring that covers a distal end portion of the positioning member and the inner tube and is screwed to a rear end of a dental handpiece or a dental electric motor, and the connector ring is allowed to rotate. The outer tube is arranged so that it can rotate at a certain angle with the connector ring. Dental hose is provided, characterized in that the.
[0006]
In the present invention, a cylindrical hose guide may be inserted at the distal end of the outer tube, and the positioning member may be slidably disposed inside the hose guide.
In the present invention, the positioning member may be a cylindrical body in which grooves for inserting the plurality of inclusion tubes are formed in the axial direction.
The dental hose of the present invention can be applied to both a dental handpiece equipped with an electric motor and a dental handpiece equipped with an air turbine.
[0007]
【Example】
Hereinafter, although the example of the present invention is described based on an accompanying drawing, the present invention is not limited to this.
[0008]
FIG. 1 is a side view showing a dental hose 10 and a motor unit 1.
In the motor unit 1, a motor is built in the main body 3, a fluid passage or electrical wiring extends from the rear end 4 through the main body 3 to the front end 2, and a pipe or a pipe is connected to the front end 2 or the rear end 4. It has a terminal. A connecting mechanism (not shown) for connecting to a dental handpiece (not shown) is formed at the front end portion 2, and a terminal and a screw thread for connecting to the dental hose 10 are formed at the rear end portion 4. Yes.
[0009]
2 is an enlarged cross-sectional view of the distal end portion of the dental hose 10, FIG. 3 (a) is a cross-sectional view taken along line XX in FIG. 2, and FIG. 3 (b) is in FIG. It is an end view.
In the dental hose 10, all of the inner tubes 31 to 35 as fluid passages or electric wirings are bundled with the outer tube 15, and all these inner tubes 31 to 35 are positioned by the guide bush 20 at the distal end portion, and are positioned relative to each other. The connector 16 is connected to the distal ends of the internal tubes 31 to 35, and the internal tubes 31 to 35 are connected to corresponding fluid passages and electrical wires in the dental motor unit 1 by the connector 16. The distal ends of the connector 16, the guide bush 20 and the inner tube 31 to 35 are covered with the connector ring 17.
[0010]
As shown in the perspective view of FIG. 4, the guide bush 20 is a cylindrical body in which grooves 21 for inserting the inclusion tubes 31 to 35 are formed in the axial direction. Opened on the outer peripheral surface, this cylindrical body is made of elastic and slippery material, for example, resin such as fluoro rubber and silicon rubber, or synthetic resin such as polyamide resin, polypropylene resin and polyacetal resin. Is done. Further, the outer diameter of the guide bush 20 is formed to be slightly smaller than the inner diameter of the outer tube, whereby a clearance is provided between the outer peripheral surface of the guide bush 20 and the inner peripheral surface of the outer tube, so that the guide bush 20 slides. Enable.
[0011]
As shown in FIG. 2, the guide bush 20 is inserted at the distal end of the outer tube 15. The distal end of the outer tube 15 has a tubular hose guide 18 inside and a tubular joint cover outside. 16 is fitted. Here, the inner diameter of the hose guide 18 is formed larger than the outer diameter of the guide bush 20, a clearance 19 is secured between the hose guide 18 and the tip of the outer tube 15 is slightly enlarged, This facilitates insertion of the guide bush 20 during assembly of the dental hose 10 and facilitates sliding of the guide bush 20 in the outer tube 15. The joint cover 16 is engaged with the rear end portion 17 b of the connector ring 17, and is stopped and positioned at the front end of the outer tube 15.
In FIG. 2, the hose guide 18 is formed shorter than the guide bush 20, but a hose guide 18 formed longer than the entire length of the guide bush 20 may be used.
[0012]
The connector ring 17 is formed with a thread on the inner peripheral surface 17a of the tip, and the connector ring 17 is screwed to the dental motor unit 1 by the thread. Further, a step is provided behind the screw thread on the inner peripheral surface 17a of the tip so that the connector 16 fitted therein is held, and the inner peripheral length of the rear end 17b is locked to the rear end of the joint cover 16. Protruding parts are formed. The connector 16 fixed to the connector ring 17 is arranged so that a slight rotation is allowed.
[0013]
As shown in FIGS. 3A and 3B, the internal tubes 31 to 35 drive a motor cooling air tube 31 that supplies air to cool the motor built in the motor unit 1, and the motor. Motor driving lead wire 32 for supplying electricity, tip air tube 33 for spraying tooth air for blowing tooth cutting powder and the like in the oral cavity, and water tube 35 for spraying at the tip of the dental handpiece It is an illumination lead wire 34 that supplies electricity to the illumination for illuminating the dental treatment site, and all of the inner tubes 31 to 35 are bundled with the outer tube 15, and the outer tube 15 is made of a good material coated with silicon. The inner tube 31 to the inner tube 15 is thereby formed. With 5 twist is being reduced, smooth sliding of the guide bush 20 is achieved.
The above-mentioned inclusion tubes 31 to 35 are connected to one surface of the connector 16, and pipes and terminals projecting from the other surface of the connector 16, that is, a motor cooling air pipe 31a, a motor driving terminal 32a, and a spray tip air 33a, the lighting terminal 34a, and the spray water pipe 35a are communicated or electrically connected.
In the dental hose 10, the fluid passages of the motor cooling air tube 31, the spray tip air tube 33, and the spray water tube 35 are larger in diameter than the electric wiring of the motor drive lead wire 32 and the illumination lead wire 34. Is formed. Moreover, the use of the inclusion tube demonstrated above is an example, and it does not specifically limit to this.
[0014]
Next, the operation when the dental hose 10 is connected to the dental motor unit 1 will be described. When the dental hose 10 in the state shown in FIG. 2 is connected to the dental motor unit 1, first, a pipe or terminal protruding from the front surface of the connector 16 of the dental hose 10 is connected to the rear end of the dental motor unit 1. Then, the connector ring 17 is rotated and screwed into the rear end portion 4 of the dental motor unit 1. When the connector ring 17 is tightened, the hose guide 18, the outer tube 15 and the joint cover 16 are held at the stepped portion of the connector ring 17, so that the connector ring 17 rotates at a certain angle. Therefore, the outer tube 15 and the inner tubes 31 to 35 are slightly twisted, but all of the inner tubes 31 to 35 are guided by the guide bush 20. In addition, since the guide bush 20 has a clearance between the hose guide 18 and the outer tube 15, the inner tube 31 to 35 rotate integrally with each other in a fixed positional relationship. . Therefore, the inclusion tubes 31 to 35 are prevented from being entangled with each other in the outer tube 15, and the generation of wrinkles in the outer tube is suppressed.
[0015]
【The invention's effect】
In the dental hose of the present invention, since the positioning member that maintains the mutual positional relationship between the inner tube is fixed in the outer tube, even if a force twisting the inner tube or the outer tube is applied. However, the entanglement of the inner tube is prevented, and the generation of wrinkles in the outer tube can be suppressed.
[Brief description of the drawings]
FIG. 1 is a side view showing a dental hose and a motor unit of the present invention.
FIG. 2 is an enlarged cross-sectional view of a distal end portion of a dental hose.
3A is a cross-sectional view taken along line XX in FIG. 2, and FIG. 3B is an end view in FIG.
FIG. 4 is a perspective view of a positioning member in the dental hose of the present invention.
[Explanation of symbols]
1 Dental motor 15 outer tube 16 connector 18 hose guide 20 guide bush (positioning member)
31-35 inclusion tube

Claims (3)

A plurality of inner tubes as fluid passages or electric wires, an outer tube that bundles all of the inner tubes, and a plurality of fluid passages and electric wires of a dental handpiece or a dental electric motor respectively at the front ends of the inner tubes A connector to be connected to each other, a positioning member that is slidably inserted into the outer tube in order to position each of the plurality of inner tube and prevent the mutual positional relationship from changing , the connector, the positioning member And a connector ring that covers the distal end portion of the inner tube and is screwed to the rear end of a dental handpiece or a dental electric motor,
A dental hose characterized in that the connector is disposed in a connector ring so as to be allowed to rotate, and the outer tube is provided so as to be able to rotate at a predetermined angle along with the connector ring .   The dental hose according to claim 1, wherein the positioning member is a columnar body in which grooves for inserting the plurality of internal tubes are formed in the axial direction.   The dental hose according to claim 2, wherein a tubular hose guide is inserted at the outer tube tip, and the positioning member is slidably disposed inside the hose guide.

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