JPH074340B2 - Scope objective swing structure - Google Patents

Description

The present invention relates to a scope-to-swing structure.

[Conventional technology]

Conventionally, a scope objective swing structure a as illustrated in FIG.
Is used. That is, the connecting tools f and g are fixed to the image guide e at both fulcrums b and c of the oscillating portion length l, and the oscillating wire h
The distal end of the wire is fixed to the most distal connecting tool f, the wire h is slidably inserted into the eccentric small hole of the other connecting tool g, and the outer tube i is covered.

Here, the function and necessity of the outer tube i will be described. In FIG. 7, if the wire h is pulled from the right side outside the drawing,
Since the oscillating portion length l of the image guide e is constant,
As shown in the figure, the image guide e is bent. In this way, the wire h is stretched like a bowstring and the image guide e
There is a part far away from. By preventing this, the parallel distance between the image guide e and the wire h is limited, and
In order to bend as shown, an outer tube i is required.

[Problems to be Solved by the Invention]

In such a conventional scope objective swing structure a, when the diameter of the outer tube i is large and the diameter of the scope-constituting insert such as the image guide e and other light guides is also large, the resistance to bending (swing) increases. However, the tension of the wire h must be increased accordingly. Therefore, as shown in FIG. 9 and FIG. 10, the wire h strongly tries to stretch in a straight line of the bow chord and is transformed into the outer tube i.
There is a problem in that a dragging deformation occurs, resulting in an unnatural bending (pivoting). There is also a problem that the outer tube i is damaged.

[Means for Solving the Problems]

In order to solve such a conventional problem, the present invention provides a spirally deformable spiral tube formed by spirally winding a band-shaped body, and a short tubular first connector connected to the tip of the tube. A scope objective swing structure having a tubular body composed of a short tubular second coupling tool coupled to a proximal end of the tube, wherein a plurality of channels are inserted into the tubular body, wherein the tubular body has a neck. An image in which a vibrating wire is inserted, the distal end of the wire is fixed to the inner peripheral surface side of the first connecting tool, and the vibrating wire is disposed in the tubular body at a position opposite to the wire center by about 180 °. A guide is inserted and the image guide is fixed to the inner peripheral surface side of the first and second connecting tools.

[Work]

If you pull the swing wire toward the base end, the image guide will
Since it is fixed to the short tubular first connecting tool and the short tubular second connecting tool, and is disposed at a position opposite by about 180 ° with respect to the swing wire, the first and second connecting tools. The image guide acts as a bulging member to bend the tubular body, and if the tensile force to the proximal end side of the swinging wire is released, the restoring force (elastic force) of the image guide causes the tubular body to move. Returns to a straight line.

In the straight state of the spiral tube, a gap with a predetermined interval is formed at a constant pitch, but if the wire is pulled, the tube will be bent until the gap on the wire side disappears. Do not bend. Moreover, since the wire is inserted into the first connector, the spiral tube, and the second connector, the wire does not directly contact the outer tube.

〔Example〕

 Hereinafter, embodiments will be described with reference to the drawings.

FIG. 1 shows a fiberscope objective used for observation by inserting it into a small-diameter tube such as a blood vessel, ureter, or lung for medical use, or in a pipe or various devices for industrial use. 1 shows a swing structure, which includes a tubular body composed of a pair of short tubular first and second connecting members 1 and 2 and a spiral tube 3 interposed therebetween. .

Then, the first connecting member 1 is made of a short-length metal (for example, stainless steel) cylindrical body, and as shown in FIG.
The wire pipe 4 so that it is at the opposite position with respect to the axis.
The image guide pipe 5 is fixed along the axial direction. Both pipes 4 and 5 are made of metal such as stainless steel like the first connector 1, and are fixed to the first connector 1 by soldering or the like.

The second connecting member 2 is the first connecting member 1 whose length dimension is slightly lengthened, and its configuration is the same as that of the first connecting member 1. That is, the wire pipe 6 and the image guide pipe 7 are fixed to the inner peripheral surface 2a.

Next, the spiral tube 3 is formed by spirally winding a band-shaped body made of metal such as stainless steel, as shown in FIG. 1, and having a predetermined pitch at regular intervals along the longitudinal direction. A gap 8 is formed so that it can be curved and deformed. The tip 3a of the spiral tube 3 is connected to the first connecting tool 1, and the base end 3b is connected to the second connecting tool 2. That is, the tip end 3a is externally fitted to the first connector 1 and adhered with an adhesive or the like, and the base end 3b is externally fitted to the second connector 2 and adhered with an adhesive or the like. The outer diameter of the spiral tube 3 can be changed by tightening or loosening the spiral tube 3 around the axis.

Then, the tip of the swinging wire 9 is inserted and fixed to the wire pipe 4 of the connector 1, and is inserted through the spiral tube 3 and the wire pipe 6 of the second connector 2. That is, the wire 9 is free in the tube 3 and the wire pipe 6. The tip of the wire 9 is fixed to the wire pipe 4 by an adhesive or the like.

Therefore, the wire 9 and the image guide are attached to the cylindrical body (consisting of the first and second connecting members 1 and 2 and the spiral tube 3).
12 is inserted, the tip of the wire 9 is fixed to the inner peripheral surface side of the first connecting member, and the image guide 12 is fixed to the inner peripheral surface side of the first and second connecting members 1 and 2, and Image guide 1
The wire 2 is disposed at a position opposite to the wire 9 by about 180 ° with respect to the axis.

Further, as shown in FIG. 3, a wire outer 10 made of a coil spring is inserted and fixed to the opening of the base end of the wire pipe 6 of the second connector 2, and further, the wire outer is attached to the pipe 6. A stopper pipe 11 with which the tip of 10 abuts is fitted inside. The pipe 11 and the wire outer 10 are adhered to each other with an adhesive.

The tip of the image guide 12 is inserted and fixed in the image guide pipe 5 of the first connector 1, and
The spiral tube 3 and the image guide pipe 7 of the second connector 2 are inserted. In the image guide pipe 7, the image guide 12 is fixed to the pipe 7 (adhesion by an adhesive or the like).

Here, the image guide 12 is composed of a glass portion composed of a large number of pixels including a core and a clad, and a precoat layer, and an objective lens 13 is attached to the tip thereof. Further, a tube 14 made of polyimide or the like is loosely fitted over the image guide 12 between the connecting tools 1 and 2. That is, the tube 14 prevents the precoat layer from being damaged by rubbing in the spiral tube 3.

Further, as shown in FIGS. 1 and 2, various channels 15, 16, 17 and a light guide 18 are provided in the cylindrical body (consisting of the first and second connecting tools 1, 2 and the spiral tube 3). , 18 have been inserted. That is, the channels 15, 16 and 17 are each made of a urethane tube, and the light guides 18 and 18 are inserted into the urethane tubes 19 and 19, respectively. Of course, other than these, it is also possible to insert a laser fiber or the like, and further, the wire 9 and the image guide 12
Only need be. Here, the light guide 18 is composed of a plurality of optical fiber strands. In FIG. 2, S indicates an epoxy resin adhesive.

2 and 3, reference numeral 20 denotes an outer tube, and the tube 20 is connected to the tip 20a corresponding to the first connector 1 to the second connector 2 and the tip 20a. The main body portion 20b and the tip portion 20a are made of urethane tube.

Next, a swing operation of the structure constructed as described above will be described.

As shown in FIG. 4, when the wire 9 is pulled toward the base end side as shown by the arrow A, the image guide 12 is fixed to the first connecting tool 1 and the second connecting tool 2, and the image guide 12 between them is therefore fixed. Acts as a tension member, the first connector 1 is pulled in the direction of the arrow B, and the spiral tube 3 is bent and deformed as shown in FIG. In this case, the gap 8 on the wire 9 side of the spiral tube 3 can be deformed until it disappears. In other words, it regulates the limit of the bending deformation, and the image guide
It is possible to prevent damage such as 12. Further, since the wire 9 is inserted into the tube 3, the wire 9 does not come into contact with the outer tube 20, and unlike the conventional case,
The outer tube 20 is not deformed.

Further, if the pulling force of the swinging wire 9 toward the proximal end side is released, the bending of the cylindrical body is linear due to the elastic force of the image guide 12 between the first and second connecting members 1 and 2. Return to.

Thus, according to the above-described embodiment, the first connecting member 1 and the second connecting member 1
Since the connector 2 is different only in the length dimension, it has an advantage that it can be mass-produced at a low cost when manufacturing, and the first and second connectors 1 and 2 and the spiral tube 3 are provided. Are made of metal such as stainless steel, and therefore, when pulling the wire 9, the frictional resistance is small and the wire is easy to operate. Further, the pulling force applied to the wire 9 is small, so that The durable life is extended.

〔The invention's effect〕

Since the present invention is configured as described above, it has the following effects.

Even if the spiral tube 3 is bent and deformed, the inner diameter of the spiral tube 3 is not reduced to a predetermined dimension or less, so that the internal image guide 12 and the like can be effectively prevented from being damaged.

Since the swinging wire 9 does not come into direct contact with the outer tube 20 (which covers the tubular body), the frictional resistance generated during the pulling operation of the wire 9 does not become large, and the pulling force is reduced. In addition to being easy to operate,
The life of the wire 9 and the outer tube 20 can be extended, and the outer tube 20 does not undergo deformation due to dragging or the like and does not swing unnaturally.

The structure is simple, and the storage space for inserts such as image guides is relatively large, and various channels can be inserted. Conversely, if there are few inserts, the outer diameter should be extremely small. You can

The outer diameter of the spiral tube 3 can be changed by tightening or loosening it by twisting it around the axis, so that it can be applied to various sizes of the connecting tools 1 and 2, and the outer diameter is different. What is done can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is an enlarged sectional front view of an essential part, FIG. 3 is a sectional side view, and FIGS. 4 and 5 are explanatory views of a swing operation. . 6 to 10 are explanatory views showing problems of the conventional example. 1 ... Short tubular first connector, 2 ... Short tubular second connector, 3
…… Spiral tube, 3a …… Tip, 3b …… Base end, 9
…… Swing wire, 12 …… Image guide.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideyuki Ogaku, 4-3 Ikejiri, Itami City, Hyogo Prefecture Mitsubishi Cable Industries, Ltd. Itami Works (72) Shinichi Okuno 4-3 Ikejiri, Itami City, Hyogo Prefecture Mitsubishi Electric Wire Industry Co., Ltd. Itami Works (56) Bibliography Sho 42-22615 (JP, Y1)

Claims (1)

[Claims] 1. A spirally deformable spiral tube formed by spirally winding a strip, a short tubular first connector connected to the tip of the tube, and a short tube connected to the proximal end of the tube. A scope objective swing structure including a tubular body made of a second coupling member, and a plurality of channels inserted through the tubular body, wherein a swing wire is inserted into the tubular body, and The tip is fixed to the inner peripheral surface side of the first connecting tool, and an image guide disposed at a position opposite to the wire shaft by about 180 ° is inserted into the cylindrical body. A scope objective swing structure characterized by being fixed to the inner peripheral surface side of the first and second connecting tools.