JPH0819276A - Inductor - Google Patents

Abstract

PURPOSE:To improve induction on the head by transmitting the operation from one's hand to the head easily and surely, and also, to enable the downsizing and diameter thinning, and besides, to enable this inductor to be used as a micromachine capable of moving freely within a thin pipe. CONSTITUTION:A high polymer actuator 3, which has, for example, an ion exchanging resin molded item 4 and electrodes 4 and 5 and is constituted so that the ion exchanging resin molded item 4 may be transformed by applying voltage to these electrodes 5a and 5b, is joined to the head of a linear member 2, and also this high polymer actuator 3 and an operation controller for the actuator 3 are electrically connected with each other by the lead wires 6a and 6b extending in the longitudinal direction of the linear member 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a guide wire which is inserted into a catheter for inserting a blood vessel and guides the catheter to a target site, or inspection, repair of industrial facilities and equipment, or installation in a building. The present invention relates to an optimum derivative to be used as a guide member at the time of inspection or repair in a branched branch line.

[0002]

2. Description of the Related Art For example, in the case of the catheter for inserting a blood vessel, the catheter may be inserted into a thin peripheral blood vessel. To cope with such a case, the catheter is formed extremely thin and a derivative is provided inside the catheter. It is widely practiced that the guide wire is inserted through the guide wire to cover the weakness of the waist of the catheter itself, and the guide wire is used as a guide to guide the catheter to the target site.

Here, in the insertion work of inserting the catheter into the blood vessel by using the guide wire (derivative) as a guide, the guide wire is pushed or pulled by the operating portion on the proximal side or the rotational torque is transmitted to the guide wire. While manually manipulating the position of the tip of the catheter, a guide wire is inserted into a complicated or intricate detail, and the catheter is guided to the target site by using the guide wire as a guide.

On the other hand, with the advancement and complexity of plants such as power generation equipment or mechanical systems such as aircraft engines,
Improving reliability and reducing maintenance are major issues, and inspections and repairs should be performed without disassembling in a significantly restricted space such as the piping system in a plant or the engine of an aircraft. There is a strong demand for the development of technology that can

[0005]

However, when the guide wire of the above-mentioned conventional example is used as a guide of a catheter, the push-pull transmission force is exerted in the push-pull operation at the proximal side or the operation by transmitting the rotational torque. Of the guide wire and the operability of the distal end of the guide wire are extremely poor due to lack of power and rotational torque transmission force, making it difficult to insert intricately complicated or branched details into the target site. In addition, there is a problem in that the skill of the operator is required.

If a micromachine capable of freely moving in a narrow pipe is created, it is considered that the inspection and repair work in a complicatedly laid branch pipe can be facilitated inside a building, indoors or manhole.

In view of the above, the present invention transmits the operation from the hand side to the tip portion easily and surely to improve the guiding performance of the tip portion, and it is possible to reduce the size and the diameter, and further, in the thin tube. It is an object of the present invention to provide a machine that can be used as a micromachine that can move freely.

[0008]

In order to achieve the above object, a dielectric material according to the present invention has, for example, an ion exchange resin molded product and an electrode at the tip of a linear member, and a voltage is applied to this electrode. A polymer actuator configured to deform the ion-exchange resin molded product by application is joined, and the polymer actuator and an operation control unit of the actuator extend along the length direction of the linear member. It is characterized by being electrically connected by a lead wire.

Here, the outer diameters of the linear member and the polymer actuator are, for example, preferably 5 mm or less, and more preferably 1 mm or less.

[0010]

According to the present invention constructed as described above, by constructing the polymer actuator with, for example, an ion-exchange resin molded product and an electrode, the size and diameter of the polymer actuator can be reduced and the operation control section can be provided. It is possible to improve the guiding performance as a derivative by arranging the polymer actuator on the hand side and arbitrarily and positively deforming the polymer actuator joined to the distal end of the linear member by operating this operation control unit.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 and FIG. 2 show a first preferred embodiment for use as a guide wire for a catheter. In this embodiment, a guide wire 1 as a derivative is an elongated tube made of, for example, synthetic resin or stainless steel. The linear member 2 and the polymer actuator 3 bonded to the tip of the linear member 2 are mainly configured.

The polymer actuator 3 is constructed by joining a pair of electrodes 5a and 5b to both sides of an ion-exchange resin molded product 4 having a slightly elongated rectangular flat plate shape, and applying a voltage to the pair of electrodes 5a and 5b. By doing so, the ion-exchange resin molded product 4 is bent and deformed (bent) in two directions.

One end of a pair of lead wires 6a, 6b is electrically connected to each of the electrodes 5a, 5b, and each of the lead wires 6a, 6b is inside the linear member 2. It is located and extends over the entire length of the linear member 2, and the other ends of the lead wires 6a and 6b are connected to the operation control unit 7.

The operation control section 7 is provided with an operation lever 8 capable of switching operation. With the operation of the operation lever 8, a two-pole double-throw switch 9 built in the operation control section 7 is provided. Via the power source 10 to the pair of lead wires 6
The electrodes for the currents flowing through a and 6b can be switched.

That is, in FIG. 2, the double pole double throw switch 9
Is in the position shown by the solid line, one lead wire 6a is connected to the + electrode and the other lead wire 6b is connected to the-electrode, and the two-pole double-throw switch 9 is connected to the operation lever 8 of the operation control section 7. When the operation is switched from the neutral position as shown by the chain double-dashed line, the lead wire 6
a is connected to the negative electrode, and the other lead wire 6b is connected to the positive electrode.

Next, the polymer actuator 3 will be described. The actuator 3 is developed as an actuator element that can be easily miniaturized, has a high responsiveness, and operates with a small electric power (Japanese Patent Laid-Open No. 4-42). 27507
No. 8).

That is, as the ion-exchange resin molded product 4 of the polymer actuator 3, either a cation-exchange resin film or an anion-exchange resin film can be used. For example, the cation-exchange resin film is polystyrene. Examples thereof include a sulfonic acid membrane and a fluororesin ion exchange resin membrane having a sulfone group or a carboxyl group.

The electrodes 5a and 5b to be bonded to both sides of the ion-exchange resin molded product 4 are preferably noble metals such as platinum, iridium, palladium and ruthenium, but other conductive polymers such as graphite and graphite and corrosion resistance. A substance having both properties can also be used.

Ion-exchange resin molded product 4 of electrodes 5a, 5b
For the bonding to the polymer film, known methods such as chemical plating, electroplating, vacuum deposition, sputtering, coating, pressure bonding, and welding for attaching an electrode material to the polymer film can be used. The connection of the lead wires 6a and 6b to the electrodes 5a and 5b is
It can be performed by a general method such as conductive adhesive, metal welding, fitting, caulking, and adhesive.

The material of the lead wires 6a and 6b is copper,
Common conductive materials such as iron and aluminum can be used, and if necessary, plating or insulating coating can be applied. Further, the lead wires 6a and 6b are connected to the linear member 2
It is also possible to dispose the conductive ink on the outer surface of the linear member 2 or print the conductive ink on the inner peripheral surface or the outer peripheral surface of the linear member 2 to use it as a lead wire.

In this embodiment, the ion-exchange resin molded product 4 has a film thickness of 100 μm and a width of 300 μm.
Fluororesin-based ion exchange membrane Nafion with m and length of 14 mm
(Registered trademark, manufactured by Dipon) is used, and 3m on both sides
Chemically plated platinum of m / cm ² is used to configure the polymer actuator 3 using the platinum as the electrodes 5a and 5b, and the power source 10 is a DC power source of 3V.

Although the operating principle of the polymer actuator 3 is not always clear, the ion-exchange resin molded product 4 is used.
By applying a potential difference between the front and back of the positive electrode, positive ions in the ion-exchange resin molded product 4 move to the cathode side, and water molecules move along with the ions in the ion-exchange resin molded product 4. It is considered that the ion-exchange resin molded product 4 is curved due to a difference in water content on the side, swelling when the water content increases, and contraction when the water content decreases.

That is, by operating the operation lever 8 of the operation control section 7, one lead wire 6a is moved to the + side of the power source 10 and the other through the double pole double throw switch 9 as shown by a solid line in FIG. If the lead wire 6b is connected to the negative side at the same time, the electrode 5a connected to this lead wire 6a becomes an anode, and the electrode 5b connected to the other lead wire 6b becomes a cathode. As a result, the ion exchange resin The molded product 4 is curved upward from a linear neutral position shown by a solid line in the drawing as shown by a dotted line in the drawing.

Then, by operating the operation lever 8 in the operation control section 7, one lead wire 6a is placed on the negative side of the power source 10 and the other lead wire 6b is also placed on the positive side, as shown by the chain double-dashed line in FIG. , The electrode 5a connected to the lead wire 6a becomes a cathode, and the electrode 5b connected to the other lead wire 6b becomes an anode. As a result, the ion-exchange resin molded product 4 becomes two points in the drawing. It will curve downward as shown by the chain line.

In this way, the operation control unit 7 is placed on the hand side, and the operation lever 8 of the operation control unit 7 is operated so that the polymer actuator 3 bonded to the distal end of the linear member 2 can be arbitrarily moved. Guide wire 1 by actively deforming
As a result, the induction performance can be improved.

In the above embodiment, the outer diameter of the linear member 2 is preferably 5 mm or less, more preferably 1 mm or less in relation to the inner diameter of the catheter. In addition, the electrodes 5a,
The voltage applied to 5b is, for example, 10 V or less, and is preferably about 2 V when gas is generated depending on the kind of electrode material.

In the above embodiment, the catheter (not shown) is inserted into the blood vessel by inserting the guide wire 1 as a derivative into the catheter with the polymer actuator 3 at the tip exposed. Then, while the polymer actuator 3 is arbitrarily deformed by the operation of the operation control unit 7, the guide wire 1 is inserted into the intricately complicated or branched details, and the guide wire 1 is used as a guide to guide the catheter to the target site. Done by.

FIG. 3 shows the second embodiment, and the difference of this embodiment from the first embodiment is as follows. That is, in this guide wire (derivative) 11, a composite tube composed of a stainless coil 12a and a stainless tube 12b is used as the linear member 12, and the stainless coil 12a and the stainless tube 12b are used as one lead wire 16a. Further, the other lead wire 16b is composed of, for example, a 30 .mu.m iron stranded wire covered with an insulating coating, and this lead wire 16b is inserted into the linear member 12.

Then, the stainless steel coil 12a and the stainless steel tube 12b (lead wire 16a) are pressure-bonded to the base of the ion-exchange resin molded product 4 at the tips thereof, and the one surface of the ion-exchange resin molded product 4 is pressed. The lead wire 16 is electrically connected to the formed electrode 5a.
b and the electrode 5b formed on the other surface of the ion-exchange resin molded product 4 are electrically connected by tin solder 40 or the like.

Further, the linear member 12 is bonded to the ion-exchange resin molded product 4 with an epoxy adhesive 41, and tin solder between the lead wire 16b and the electrode 5b is bonded via the epoxy adhesive 51. Insulating the part,
The lead wires 16a and 16b are prevented from being short-circuited with each other.

Then, the stainless steel coil 12a is pushed into the inside of the stainless steel tube 12b at the base end portion side thereof, and is fixedly adhered with an epoxy adhesive, and the base end portion of the stainless steel tube 12b (lead wire 16a) is electrically fixed. The lead wire 16c connected to the lead wire 16c, and the lead wire 16c and the lead wire 16b are connected to a control operation part 17 having a two-pole double-throw switch built-in and an operation lever 18. It is connected to the power supply unit 20.

As a result, by operating the operating lever 18 of the control operating portion 17, the ion-exchange resin molded product 4 can be arbitrarily and positively curved in two directions as in the first embodiment. It is configured to be able to.

In the case of this embodiment, the stainless steel coil 12a and the stainless steel tube 12b constituting the linear member 12 are formed.
By using and as one of the lead wires, only one lead wire extending along the linear member can be used.

In the second embodiment, the power supply unit 20
Although it is configured separately from the operation control unit 17, it is a matter of course that the power supply unit may be built in the control operation unit as in the first embodiment.

FIG. 4 shows the third embodiment. The guide wire (derivative) 21 in this embodiment is a linear member 12 made of the composite tube in the second embodiment.
The prism-shaped polymer actuator 23 is bonded to the tip of the.

That is, the polymer actuator 23 is
For example, an ion exchange resin molded product 24 in the shape of a regular square pole having a 300 μm square and a length of 14 mm, and this ion exchange resin molded product 2
4 is composed mainly of two pairs (4) of electrodes 25a, 25b, 35a, 35b which are electrically insulated from each other on the four side faces of the electrodes 25a, 25b, 35a, 3
5b is electrically connected to one end of lead wires 26a, 26b, 36a, 36b made of, for example, an insulating coated iron wire of 30 μm via tin solder or the like, and is opposed to each other with the ion exchange resin molded product 24 interposed therebetween. Electrodes 25a, 25
By applying a voltage to b, 35a, and 35b, it is curved in four directions.

In this embodiment, the electrodes 25a,
25b, 35a and 35b are ion exchange resin molded products 24
It is formed by uniformly applying platinum plating or the like to the four side surfaces excluding both end surfaces of the above, and then removing the platinum plating located at the four corners along the length direction.

In this embodiment, the ion-exchange resin molded product 24 is used.
Two pairs of electrodes 25a, 25b, 3 facing each other with
5a and 35b, like the above-mentioned respective embodiments, by applying a voltage to these electrodes 25a, 25b, 35a and 35b, they can be arbitrarily curved in four directions,
Moreover, it is possible to rotate by combining the bending directions.

Although it can be configured to rotate by providing three electrodes, four electrodes (two pairs) are provided.
This electrode can be rotated more smoothly by providing the electrode.

In the case of this embodiment, each of the lead wires 26
a, 26b, 36a, 36b are located inside the linear member 12 and extend along this length method, and reach the operation control section 17 shown in FIG. 3, for example. , 26b, 36a, 36b are arranged outside the linear member 12, or the linear member is formed of a double tube and arranged at this joint interface as in the fourth embodiment below. good.

5 to 7 show the fourth embodiment, and the guide wire (derivative) 31 in this embodiment is shown.
Is a double tube composed of an inner tube 32a and an outer tube 32b used as the linear member 32, and a cylindrical polymer actuator 33 is joined to the tip of the linear member 32.

That is, the polymer actuator 33 is
For example, inner diameter 600μm, outer diameter 800μm and length 15mm
Cylindrical ion-exchange resin molded product 34, and four pairs (8) of electrodes 45a, 45b, 5 formed on the inner peripheral surface and the outer peripheral surface of the ion-exchange resin molded product 34 at positions facing each other.
5a, 55b, 65a, 65b and 75a, 75b, and each of these electrodes 45a, 45b, 55a,
55b, 65a, 65b and 75a, 75b, for example, a lead wire 46 made of an insulating coated iron wire of 30 μm.
a, 46b, 56a, 56b, 66a, 66b and 76
Electrodes 45a, 45b, 55a, 55b, 65a, 6 that are electrically connected to one ends of a and 76b through tin solder or the like and face each other with the ion exchange resin molded product 34 in between.
By applying a voltage to 5b and 75a, 75b,
It is curved in four directions.

In this case, in order to prevent the curving directions from canceling each other, the electrodes located on the sides facing each other, that is, the electrodes 45a and 45b and the electrodes 65a and 65b,
It is necessary to apply a voltage so that the electrodes 55a and 55b and the electrodes 75a and 75b move in the same direction.

Further, the electrodes 45a, 45b, 55a, 55
b, 65a, 65b and 75a, 75b are platinum-plated uniformly on the outer peripheral surface and the inner peripheral surface of the ion-exchange resin molded product 34, and then the outer peripheral surface and the inner peripheral surface are formed along the lengthwise direction of each other. It is formed by providing platinum-plating removal portions at four opposing locations.

In the case of this embodiment, a total of eight lead wires 46a, 46b, 56a, 56b, 66a, 66 are provided.
Since b and 76a, 76b run along the linear member 32, as shown in FIG.
46b, 56a, 56b, 66a, 66b and 76a,
76b is arranged at the joint interface between the inner pipe 32a and the outer pipe 32b,
As a result, these lead wires 46a, 46b, 56
The a, 56b, 66a, 66b and 76a, 76b are designed to be out of the way.

In this case, for example, by forming the double tube using the outer tube 32b as a heat-shrinkable resin, the inner tube 32
a and the lead wires 46a, 46 arranged between the outer tube 32b and
b, 56a, 56b, 66a, 66b and 76a, 76
b can be pinched and held immovably.

[0047]

Since the present invention has the above configuration,
The polymer actuator bonded to the tip of the linear member
By the operation by the operation control unit, the guide performance is improved by arbitrarily and positively curving, whereby, for example, when used as a guide wire for a catheter,
The catheter can be inserted into the target site quickly and easily without requiring skill.

Moreover, the size reduction and the diameter reduction can be achieved by configuring the polymer actuator with, for example, an ion exchange resin molded product and an electrode.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing a main part of FIG. 1 in an enlarged manner.

FIG. 3 is a schematic diagram showing a second embodiment.

FIG. 4 is an enlarged perspective view of an essential part showing a third embodiment.

FIG. 5 is an enlarged perspective view of essential parts showing a fourth embodiment.

6 is an enlarged sectional view taken along line AA of FIG.

7 is an enlarged sectional view taken along line BB of FIG.

[Explanation of symbols]

1, 11, 21, 31 Guide wire (derivative) 2, 12, 32 Linear member 3, 23, 33 Polymer actuator 4, 24, 34 Ion exchange resin molded product 5a, 5b, 25a, 25b, 35a, 35b, 45
a, 45b, 55a, 55b, 65a, 65b, 75
a, 75b electrodes 6a, 6b, 26a, 26b, 36a, 36b, 46
a, 46b, 56a, 56b, 66a, 66b, 76
a, 76b Lead wire 7, 17 Control operation unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kinji Azumi 1-831 Midorigaoka, Ikeda City, Osaka Prefecture Industrial Technology Institute, Osaka Institute of Technology Inoguchi 2806-4

Claims (3)

[Claims] 1. A polymer actuator that deforms due to a potential difference is joined to the tip of the linear member, and the polymer actuator and the operation control unit of the actuator extend along the length direction of the linear member. A derivative characterized by being electrically connected by a lead wire. 2. The polymer actuator has an ion-exchange resin molded product and an electrode, and the ion-exchange resin molded product is deformed by applying a voltage to the electrode. The derivative according to claim 1. 3. The dielectric according to claim 1, wherein the linear member and the polymer actuator have an outer diameter of 5 mm or less, preferably 1 mm or less.