JPH04343316A - Scope oscillating structure - Google Patents

Abstract

PURPOSE:To thin the diameter without increasing the number of parts. CONSTITUTION:The structure is provided with plural short cylindrical bodies 2 provided along the longitudinal direction, and a pair of oscillating wires 4, 5 inserted through a pair of axis center direction through-holes 3, 3 penetrated and. provided on a peripheral wall 5 of the short cylindrical body 2. On one end face 5a of the peripheral wall 5 of the short cylindrical body 2, a pair of opposed projecting parts 6, 6 of a semidisk shape are provided projectingly, and on the other end face 5b of the peripheral wall 5 of the short cylindrical body 2, a pair of opposed recessed parts 7, 7 are recessed and provided. When each short cylindrical body 2 is provided along the longitudinal direction, the projecting parts 6, 6 are fitted into the recessed parts 7, 7 of the short cylindrical bodies being adjacent to each other so as to be oscillatable.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swinging structure for a fiberscope.

0002

2. Description of the Related Art Conventional swinging structures shown in FIGS. 12 and 13 are known. That is, it includes a plurality of short cylindrical bodies a... and a spherical body b... interposed between the short cylindrical bodies a, a,
The circumferential wall c of each short cylindrical body a is provided with through holes e, e through which the oscillating wire d is slidably inserted. The sphere b has a through hole m therethrough as shown in FIG. 14, and a pair of recesses provided at a position shifted by 90 degrees in the circumferential direction with respect to the through hole e, as shown in FIG. It is fitted in f, f. In addition, a through hole n arranged on the same axis is provided in the peripheral wall of the short cylinder a, and a wire (not shown) is inserted into the through hole m of the sphere b and the through hole n of the short cylinder a. has been done.

As shown in FIG. 13, the fulcrums g, h
Fix the connectors i and j to an image guide (not shown), etc., fix the tips of the swinging wires d and d to the most advanced connector i, and insert the wire d into the small hole of the other connector j. , d were slidably inserted therethrough and covered the outer tube k.

Therefore, the adjacent short cylinders a, a can swing relative to each other via the sphere b, and if one swinging wire d is pulled toward the proximal end, as shown in FIG. As shown, the head can be swung toward the wire d.

[0005]

[Problems to be Solved by the Invention] In the conventional scope swinging structure described above, if the overall outer diameter is to be made small,
The outer diameter of each sphere b became small, the dimension between the short cylinders a became small, the possible swing angle became small, and the surface pressure became excessive, making it impossible to make the diameter very small. Another drawback was that it had many parts and was difficult to assemble.

Therefore, the present invention provides a scope that does not reduce the possible swing angle even though the outer diameter can be made small, reduces the number of parts, and has excellent durability. The purpose is to provide a swinging structure.

[0007]

[Means for Solving the Problems] In order to achieve the above-mentioned object, one scope oscillation structure according to the present invention has a pair of protrusions facing each other in the shape of a semi-disc or semi-ellipse on one end surface of a peripheral wall. a pair of axial through-holes protruding from the other end surface of the peripheral wall, with a pair of recesses positioned circumferentially the same as the protrusion, and 90° offset in the circumferential direction with respect to the protrusion and the recess; A plurality of short cylindrical bodies formed by penetrating through the peripheral wall are arranged in the longitudinal direction so that the protruding portions are fitted into the recesses so as to be swingable so that the adjacent short cylindrical bodies can swing relative to each other. The oscillation wires are arranged along the cylindrical body and slidably inserted into the pair of through holes of each short cylindrical body.

Another scope swinging structure according to the present invention has a pair of protrusions facing each other in the shape of a semi-disc or semi-ellipse protruding from one end surface of a peripheral wall, and a pair of protrusions facing each other in the shape of a semi-disk or a semi-ellipse. A plurality of short cylindrical bodies each having a pair of recesses shifted by 90 degrees in the other end surface of the peripheral wall, and four axial through holes corresponding to the protrusions or recesses extending through the peripheral wall. are arranged along the longitudinal direction so that the protruding part is swingably fitted into the recess and the adjacent short cylinders can swing relative to each other; A swinging wire is slidably inserted into each of the through holes.

[0009]

[Operation] In the above-mentioned first scope swinging structure, when one swinging wire is pulled toward the proximal end, each short cylinder swings toward the wire around the recessed portion. The head can be swung, and if another oscillating wire is pulled toward the proximal end, each short cylindrical body will oscillate toward the wire around the concave portion, and the head can be swung toward the wire. can. In other words, it is possible to make the head swing 180 degrees in the opposite direction.

Furthermore, even when the wall thickness of each short cylinder is made small and the outer diameter of each short cylinder is made small, the protrusion size of the protrusion does not become small, and the distance between the adjacent short cylinders does not decrease. The dimensions will not be small.

[0011] Furthermore, in the above-mentioned other scope swinging structure, the protrusions of every other short cylinder are arranged at the same position in the circumferential direction, so that the two short cylinders are integrally formed. oscillate.

That is, when one oscillating wire is pulled toward the proximal end, each short cylindrical body swings toward the wire centering on the recessed portion circumferentially shifted by 90 degrees with respect to the wire. You can turn your head to the wire side.

Therefore, in this case, it is possible to make the head swing in four directions that are shifted by 90° in the circumferential direction, and, like the first scope swinging structure described above, the outer diameter dimension of each short cylinder can be adjusted. Even when it is made smaller, the protrusion dimension of the protrusion does not become smaller.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below based on drawings showing examples.

FIG. 1 shows a scope swinging structure according to the present invention, and this structure includes a plurality of short cylindrical bodies 2 housed in an outer tube 1, and each axis of the short cylindrical bodies 2. It is equipped with a pair of swinging wires 4, 4 that are slidably inserted into the directional through holes 3, 3, and is inserted into pipes or various devices for industrial use, for example, to perform observations, etc. .

As shown in FIG. 4, the short cylindrical body 2 includes a short cylindrical peripheral wall 5 and a pair of protrusions in the shape of a semi-disc or semi-elliptic disc protruding from one end surface 5a of the circumferential wall 5. Part 6, 6 and
A pair of recesses 7, 7 are provided in the other end surface 5b of the peripheral wall 5. Further, the protrusions 6, 6 are connected to the peripheral wall 5.
The recesses 7, 7 are located at symmetrical positions (that is, 180° opposite positions) with respect to the center of the recesses 7, 7 facing each other, and the recesses 7, 7 are provided at the same position in the circumferential direction as the protrusions 6, 6.

The axial through holes 3, 3 are provided at positions shifted by 90° in the circumferential direction with respect to the protrusions 6, 6. Incidentally, the protrusions 6, 6 are provided with through holes 8, 8 that open into the recesses 7, 7.

Thus, each short cylinder 2 has a concave portion 7 on the other end surface 5b of the short cylinder 2, where the protrusions 6, 6 on the one end surface 5a are adjacent to each other.
, 7 and arranged in the longitudinal direction. In this case, as shown in FIG. 2, the radius of curvature R1 of the recess 7 is set to be slightly larger than the radius of curvature R2 of the protrusion 6, and the center O1 of the recess 7 is set closer to the proximal end than the center O2 of the protrusion 6. , the protrusion 6 is aligned with the arrows A and B shown in FIG.
In addition, when the short cylinder bodies 2 are arranged on the same straight line, a gap 9 of a predetermined dimension L is provided between the adjacent short cylinder bodies 2. It is set. An image guide 28 (see FIG. 11) is inserted into the hole 2a of each short cylinder 2 disposed in the longitudinal direction. Note that, as shown in FIG. 4, the wall thickness t of the protrusions 6, 6 is
It is set to be approximately the same as the wall thickness dimension T of the peripheral wall 5.

As shown in FIG. 1, a wire holder 10 is installed at the tip of the outer tube 1, and a fulcrum member 11 that serves as a fulcrum for swinging is installed at the base end of the outer tube 1. has been done. That is, the wire holder 1
0 is a cylindrical body in the illustrated example, and the tip of an image guide 28 (see FIG. 11) is inserted and fixed into this hole 13, and the tips 4a, 4a of each wire 4, 4 are inserted and fixed into its peripheral wall 12. There is. Note that the holding body 10 is the outer tube 1
It is integrated by being glued to the tip with adhesive or the like. Further, the proximal end surface 10a of the holder 10 has a recess 7 of the short cylinder 2.
Recesses 14, 14, which are the same as those shown in FIG.

Furthermore, in this case, the wires 4, 4 may be held as shown in FIG. That is, a cylindrical body 27 having axial through holes 26, 26 through which the wires 4, 4 are inserted is attached to the distal end of the outer tube 1, and the distal end of the image guide 28 and the light guide 29 are attached to the cylindrical body 27. A distal end cylinder member 30 into which the distal end portion of the distal end portion is inserted is continuously provided. The cylindrical body 27 has a distal end cylindrical portion 27a and a proximal end cylindrical portion 2.
7b, and axial through holes 26, 26 are provided through the peripheral wall 31 of this proximal end cylinder portion 27b.
, 26, and the wire protrusions 32, 32 which protrude into the tip tube portion 27a through the wires 32, 32 are fitted with retaining members 33, 33. Note that 34 is an objective lens made of a rod lens attached to the tip of the image guide 28.

The fulcrum member 11 is made of a cylindrical body, and the image guide 28 and the like are inserted into the hole 15 of the fulcrum member 11.
The image guide 28 is fixed to the fulcrum member 11. Axial through holes 17, 17 are provided in the peripheral wall 16, and swing wires 4 are inserted into the through holes 17, 17, respectively.
, 4 are slidably inserted. Furthermore, surrounding wall 1
A pair of protrusions 18, 18 in the shape of a semi-disc or semi-ellipse are provided on the distal end surface 10b of the protrusion 6, which are pivotally fitted into the recess 7 of the short cylinder 2 at the proximal end. The outer circumferential surface of the fulcrum member 11 is fixed to the inner circumferential surface of the outer tube 1, and a jacket 19 is fitted onto the proximal end of the outer tube 1. Further, wires 20, 20 (see FIG. 3) are inserted through the through holes 8, 8, . . . of each short cylindrical body 2, and the short cylindrical bodies 2 are connected.

Therefore, according to the scope oscillating structure constructed as described above, one wire 4 can be pulled toward the proximal end as shown by arrow C from the state in which it is arranged in a straight line as shown in FIG. For example, the wire holder 10 is pulled toward the proximal end, but in this case, the short cylinder 2 at the proximal end is restricted from moving toward the proximal end by the fulcrum member 11, so as shown in FIG. Each short cylindrical body 2... centers around the recesses 7, 7, and connects one wire 4.
The structure swings toward the one wire 4 in the direction of arrow D shown in FIG. 3.

Furthermore, from the state shown in FIG. 1, the other wire 4
If the wire is pulled toward the proximal end as shown by arrow E, the head will swing toward the wire 4 as shown by arrow F in FIG.

Therefore, according to this structure, as shown in FIG. 3, it is possible to swing the head in two directions 180° opposite to each other.

Next, FIG. 6 shows another embodiment. In this case, as shown in FIG.
It is possible to swing the head in four directions: , I, and J.

That is, the short cylindrical body 2 in this case has a cylindrical peripheral wall 21 and one end surface 21 of the peripheral wall 21, as shown in FIG.
The peripheral wall 21 has a pair of protrusions 22 in the shape of a semi-disc or semi-ellipse protruding from the circumferential wall 21, and a pair of recesses 23, 23 are provided in the other end surface 21b of the peripheral wall 21. Further, the protrusions 22, 22 are located at symmetrical positions (that is, 180° opposite positions) with respect to the center of the peripheral wall 21, and face each other, and
The recesses 23, 23 are offset from the protrusions 22, 22 by 90° in the circumferential direction.

[0027] The peripheral wall 21 has protrusions 22, 2
2, the axial through holes 24, 24 and the recesses 23,
Axial direction through holes 25, 25 corresponding to 23 are provided therethrough.

Therefore, in this case, as in the above embodiment,
The protrusions 22, 22 on the one end surface 21a are fitted into the recesses 23, 23 on the other end surface 21b of the short cylindrical body 2 adjacent to each other, and are disposed in the longitudinal direction as shown in FIG. In this case as well, the protrusion 22 and the recess 23 have the same shape and size as the embodiment shown in FIG. 1, and when arranged in the longitudinal direction, as shown in FIGS. A gap 9 of a predetermined size L is formed in the short cylinders 2, 2, and the protrusions 22,
22 is allowed to swing in the directions of arrows A and B relative to the recesses 23 and 23.

If the short cylinders 2 arranged in the longitudinal direction as shown in FIG. 6 are housed in the outer tube 1 as shown in FIG. 1 or 11, the result will be as shown in FIG. It can swing its head in four directions.

That is, for example, as shown in FIG. 9, if one wire 4 is pulled toward the proximal end in the direction of arrow K, the recesses 23, 23 located at positions 90° apart from the wire 4 in the circumferential direction are centered. The short cylindrical body 2 swings toward the wire 4, and swings its head toward the wire 4 to which the tensile force is applied, as shown by the imaginary line in FIG. In other words, it shakes its head in the direction of arrow G in FIG. In this case, the protrusions 22, 22 of the short cylindrical bodies 2 are arranged at the same circumferential position every other time, so that the protrusions 22, 22 of the two short cylindrical bodies 2,
2 swing together.

Furthermore, if the other wire 4 is pulled toward the proximal end in the direction of arrow M from the state shown in FIG. You will have to shake it. In other words, it shakes its head in the direction of arrow H in FIG.

Furthermore, if one wire 4 is pulled toward the proximal end in the direction of arrow N from the state shown in FIG. 10, also in this case, the head swings toward the side of the wire 4 to which the tensile force is applied. In other words, it shakes its head in the direction of arrow J shown in FIG. Moreover, if another wire 4 is pulled toward the proximal end in the direction of arrow P from the state shown in FIG. 10, also in this case, the wire swings toward the side of the wire 4 to which the tensile force is applied. In other words, Figure 8
Shake your head in the direction of arrow I shown.

Therefore, according to this embodiment, there are 9 in the circumferential direction.
Although the head can be swung in four directions that are shifted by 0°, it also has the advantage of not requiring a large number of parts.

Note that the present invention is not limited to the above-described embodiments, and design changes may be made without departing from the gist of the present invention.
For example, the number of short cylinders 2 can be set freely, and the outer diameter, inner diameter, and height of the short cylinders 2 can also be changed freely. In addition, the sizes, shapes, etc. of the protrusions 6, 22 and the recesses 7, 23 are different from each other when the short cylinder 2 is disposed along the longitudinal direction as shown in FIG. 1 or 6. As long as the short cylindrical bodies 2 are able to swing relative to each other, the gap 9 between the adjacent short cylindrical bodies 2, 2 when disposed along the longitudinal direction is not limited to that of the embodiment. If the dimension L is small, the swingable range becomes narrow. Furthermore, if the short cylindrical body 2 is made of resin, it can be manufactured by injection molding, contributing to cost reduction.

[0035]

[Effects of the Invention] Since the present invention is constructed as described above, it produces the following effects.

According to the scope swinging structure according to claim 1, it is possible to swing the head in two directions opposite to each other by 180°, and the projecting dimensions of the projecting parts 6, 6 are equal to the wall thickness of the short cylinder 2. Since it is not related to the dimension T, even when the short cylinder 2 has a small diameter,
The protruding dimensions of the protrusions 6, 6 do not become small, so the dimension of the gap 9 between the adjacent short cylinders 2, 2 does not become small, and the swingable range does not become narrow. Further, since no sphere is required, the total number of parts is not increased, and it is easy to manufacture and has excellent durability.

According to the scope swinging structure according to claim 2, it is possible to make the head swing in four directions shifted by 90° in the circumferential direction, and moreover, the scope swinging structure according to claim 1 can be made to swing in four directions. Similarly, the wall thickness T of the short cylindrical body 2 is made small, and the short cylindrical body 2
Even if the outer diameter is made smaller, the possible swing range will not become narrower.
Moreover, the total number of parts does not increase, making it easy to manufacture and having excellent durability.

[Brief explanation of drawings]

FIG. 1 is a side view showing one embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional side view of essential parts.

FIG. 3 is an enlarged sectional front view of main parts.

FIG. 4 is a perspective view of a short cylinder.

FIG. 5 is a cross-sectional side view of the main part in a swinging state.

FIG. 6 is a side view of main parts of another embodiment.

FIG. 7 is a perspective view of a short cylinder.

FIG. 8 is an enlarged sectional front view of main parts.

9 is a sectional view taken along the line XX in FIG. 8. FIG.

10 is a sectional view taken along the line Y-Y in FIG. 8;

FIG. 11 is a sectional view of the tip of the scope swinging structure.

FIG. 12 is an enlarged cross-sectional side view of main parts of a conventional example.

FIG. 13 is a simplified diagram of main parts of a conventional example.

FIG. 14 is an enlarged perspective view of a sphere.

[Explanation of symbols]

2 Short cylinder 3 Axial through hole 4 Wire for swinging 5 Peripheral wall 5a One end surface 5b Other end surface 6 Protruding part 7 Recess 21 Peripheral wall 21a One end surface 21b Other end surface 22 Protruding part 23 Recessed part 24 Axial through hole 25 Axial through hole

Claims (2)

[Claims] Claim 1: A pair of protrusions facing each other in the shape of a semi-disc or semi-ellipse are protruded from one end surface of a peripheral wall, and a pair of recesses located at the same position in the circumferential direction as the protrusions are recessed from the other end surface of the peripheral wall. A plurality of short cylindrical bodies each having a pair of axial through holes penetrating the circumferential wall that are offset by 90 degrees in the circumferential direction with respect to the protruding part and the recessed part are inserted into the recessed part so that the protruding part can swing. The adjacent short cylinders are arranged along the longitudinal direction so that they can swing relative to each other, and the swinging wires are slid into the pair of through holes in each short cylinder. A scope oscillation structure characterized in that it can be inserted through the scope head. 2. A pair of protrusions facing each other in the shape of a semi-disc or semi-ellipse are provided protruding from one end surface of the peripheral wall, and a pair of recesses are provided on the other side of the circumferential wall and are offset by 90 degrees in the circumferential direction with respect to the protrusions. A plurality of short cylindrical bodies each having a concave end face and four axial through holes corresponding to the protruding portion or the concave portion penetrating the peripheral wall,
arranged along the longitudinal direction so that the protruding part is swingably fitted into the recess so that the adjacent short cylindrical bodies can swing relative to each other;
A scope oscillating structure characterized in that oscillating wires are slidably inserted into the four through holes of each short cylinder.