JP2587789B2 - Conductive fluid tube in dental handpiece unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a conductive fluid pipe used for flowing a fluid from a power source to a handpiece body in a dental handpiece unit. The present invention relates to a structure of a conductive fluid pipe in a dental handpiece unit having both of the above functions.

[0002]

2. Description of the Related Art When power is supplied to a heating lamp or a motor in a handpiece body, a so-called conductive wire in which a conductive wire is covered with an insulator is used as an energizing member between a power supply unit of a power source and the handpiece body. Is disposed in the outer cable together with a fluid pipe for flowing compressed air, water, chip air, or the like.

[0003]

Since the dental treatment using the handpiece is a very detailed operation, the conductive wires connecting the handpiece body and the power source and the cables as various pipes are required to have flexibility. In addition, since the cables are often pulled sharply, toughness is also required. Therefore, the weight of the entire outer cable incorporating these cables becomes heavy, and the burden on the dentist and the like who constantly handles the cables is large.

[0004] In addition, the conductive wire, which is a current-carrying member of the above-mentioned conventional example, often breaks in the above-mentioned dental treatment in which pulling and shearing forces are frequently applied. When the conductive wire is reinforced with a reinforcing member to prevent disconnection, there is a problem that the flexibility of the entire outer cable is reduced and the weight is increased, so that the operability of the handpiece is significantly adversely affected.

The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a conductive fluid pipe in a dental handpiece unit which is lightweight, has excellent durability and operability.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned object, and the gist thereof is as follows.
The conductive wire provided in the outer cable interposed between the handpiece body and the power source is discharged, and compressed air or water that has been conventionally provided in the outer cable is used as a current supply means instead of this. Utilizing flowing fluid pipes, one of these fluid pipes
An object of the present invention is to provide a conductive fluid tube for a dental handpiece unit which is lightweight, has excellent durability and operability by forming a linear or planar conductive film on the inner and outer surfaces using the above.

The power source includes a pump and a power source, and has a function of supplying compressed air or water, chip air or electricity to the handpiece body via an outer cable.

The above-mentioned outer cable is made of a tube made of a synthetic resin or a tube covered with a knitted fabric made of a flexible material. A fluid pipe made of an insulator made of a synthetic resin for supplying the fluid is provided.

The fluid pipe is an insulating pipe made of a synthetic resin through which a fluid such as compressed air, water, or chip air is disposed, which is disposed in the outer cable, and the resin is polyurethane. , A silicon resin, a Hyflon TPE resin or the like is preferably used.

[0010] The structure of the conductive fluid pipe of the present invention may be one of the above-mentioned compressed air supply fluid pipe or exhaust fluid pipe, one each on the inner surface and the outer surface, only the inner surface or only the outer surface. May be formed by using two conductive films, or by using both fluid tubes, by using both the inner and outer surfaces of each tube, or by forming a conductive film on only the inner surface or only the outer surface. .

Further, when a fluid pipe for supplying water is used, it is disadvantageous in comparison with a pipe through which compressed air flows from the viewpoint of insulation. In this case, however, the inner and outer surfaces of the pipe are electrically conductive. In addition to the formation of a conductive film, it is necessary to form an insulating film over the conductive film on the inner surface so as not to conduct water to the inside.

As a method of forming the conductive film, there are vapor deposition and electroless plating. In addition to the above-described method of forming a conductive film, a method of forming a conductive pattern on an electric circuit board, instead of forming a conductive film on the outer surface of a fluid pipe uniformly on the pipe, is used. There is also a method of forming a pattern of a conductive film on a tube by a certain etching or the like. As the conductor forming the conductive film,
Gold, silver, nickel and the like can be mentioned, and the film may have a linear shape in addition to a planar shape.

When a conductive film is formed on the outer surface of the above-mentioned tube, in addition to holding each tube such as a separator at a constant interval, furthermore, in order to prevent a short circuit of electricity due to the contact of the outer surface of each tube, furthermore, It is desirable to form an insulator film on the upper surface.

[0014]

The conductive fluid pipe in the dental handpiece unit of the present invention has one inner surface and one outer surface of this fluid pipe in addition to the original purpose of the fluid flow such as supply and discharge of compressed air and supply of water. Alternatively, by forming a conductive film on two inner or outer surfaces, the conductive film can be used as a current-carrying member for supplying power to the main body of the handpiece, and as a result, the conductive wire in the outer cable can be discharged. Therefore, the weight of the cable is reduced, and the operability of the handpiece can be improved.

Further, by using the above-mentioned fluid tube having flexibility originally, the durability of the outer sheath cable is improved as a whole.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic view of a dental handpiece unit.

As described above, the power source 3 is provided with a pump and a power supply.
(One in the figure).

The outer cable 2 relays the power source 3 and the handpiece body 1, and has a fluid pipe 4 and a conductive fluid pipe 5 disposed therein. The conductive fluid pipe 5 of the present invention is obtained by adding conductivity to one or two of the fluid pipes 4.

FIGS. 2, 3 and 4 are detailed views of the conductive fluid pipe of the present invention.

In the example shown in FIG. 2, a partly enlarged portion of the conductive fluid pipe 5 is assumed, utilizing a conventional fluid pipe 4 in which a non-conductive fluid such as compressed air flows in the direction of the arrow. doing. A conductive film 6 is provided on the inner and outer surfaces of the fluid pipe 4.
6 'is formed, and by using this, electricity can be supplied from the power source 3 to the handpiece body 1.

In order to supply electricity, two positive and negative conduction routes are required. In this example, conductive films 6 and 6 'are formed on the inner and outer surfaces of the fluid pipe 4, respectively. Therefore, electricity can be supplied by one tube.

In addition, the outermost surface is coated with an insulator 7 in order to prevent a short circuit of electricity when a conductive fluid pipe is used together.

In the example of FIG. 3, it is assumed that the conductive fluid pipe 5 uses a conventional fluid pipe 4 in which a conductive fluid such as water flows in the direction of an arrow in the internal fluid. In this case, since the internal fluid is conductive, there is a possibility of an electrical short circuit. Therefore, in this example, after the conductive films 6, 6 'are formed on the inner surface and the outer surface of the fluid pipe 4, the innermost surface is covered with the insulator 7'.

In FIG. 3, similarly to the example of FIG. 2, the outermost surface of the tube is coated with an insulator 7 to prevent an electric short circuit with another conductive fluid tube.

In this case as well, it is possible to energize with one pipe, but the conductive pipe 7 is formed on the outer surface of the fluid pipe.
There is also a method in which electricity can be supplied using a tube.

In the example of FIG. 4, since the conductive film is not formed on the inner surface, the conductivity of the internal fluid does not matter. In this example,
Although the conductive film 6 is formed only on the outer surface of the fluid pipe, the conductive film is not formed on the entire surface, but a pattern of parallel conductive films is formed at regular intervals so as not to cause a short circuit as shown in FIG. The pattern of the conductive film is used as two energization routes.

[0028]

As described above, the conductive fluid pipe of the present invention eliminates the need for a conductive wire conventionally used as a means for supplying electricity to the handpiece body, and as a result, reduces the weight of the outer cable. Therefore, the operability of the handpiece can be improved. Also, since the conductive fluid pipe is a synthetic resin pipe covered with a conductive film,
The outer sheath cable is more flexible than the conventional case where there is a conductive wire, and has an effect such that disconnection hardly occurs as compared with the case where a conductive wire is used.

[Brief description of the drawings]

FIG. 1 is a schematic view of a dental handpiece unit.

FIG. 2 is a partially cutaway enlarged view of a conductive fluid pipe according to the present invention.

FIG. 3 is a partially cutaway enlarged view of a conductive fluid pipe according to the present invention.

FIG. 4 is an enlarged cross-sectional view of a conductive fluid pipe according to the present invention.

[Explanation of symbols]

 4. Fluid pipe 5. Conductive fluid pipe 6, 6 '. Conductive film 7, 7 '. Insulator

Claims (4)

(57) [Claims] In a dental handpiece unit, a structure of a conductor in an outer cable for conducting electricity and flowing fluid from a power source to a handpiece body, the structure comprising compressed air as the fluid. A conductive fluid tube in a dental handpiece unit, wherein a conductive film is formed on one or both of an inner surface and an outer surface of a tube made of a flowing insulator. 2. The method according to claim 1, wherein said compressed air flows through an insulator.
2. The dental handpiece unit according to claim 1, wherein a conductive film is formed on each of the inner surface or the outer surface of the two tubes, or on one of the two outer surfaces and the other inner surface. Conductive fluid pipe. 3. A structure of an electric conductor in an outer cable for conducting electricity and flowing fluid from a power source to a handpiece body in a dental handpiece unit, the structure comprising: flowing water as the fluid. The dental hand according to claim 1, wherein a conductive film is formed on an inner surface and an outer surface of a tube made of an insulating material, and the insulator is coated on the conductive film on the inner surface. Conductive fluid pipe in piece unit. 4. The method according to claim 1, wherein an insulator is coated on the upper surface of the conductive film formed on the outer surface of the tube made of the insulator. Conductive fluid tubing in dental handpiece unit of United States.