JPS63174634A - Remote control apparatus of fiberscope - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention engages two wires at the tip of the objective section and bends the objective section to one side by pulling one of the wires. The present invention relates to a remote control device for a fiberscope that bends the objective side toward the other side by pulling the other wire.

(Prior art and its problems) A conventional remote control g-position is, for example, disclosed in Japanese Patent Publication No. 61-37925.
As shown in the drawings, if you connect both wires to one chain, wrap it around one sprocket, and pull the wire in one direction by rotating one sprocket, At the same time, loosen the other wire.

However, since the wire extends long from the grip to the objective part, the wire on the side that is being pulled stretches, while the wire on the side that is loosened cannot absorb the elongation of the wire on the side that is being pulled, causing the problem of sagging.

This phenomenon occurs as the degree of curvature of the objective section increases, the amount of slack increases, and the angle at which the die is wrapped around the subbutton becomes smaller, resulting in poor engagement, which reduces operational performance and affects the durability of the chino. A problem arises.

(Means for solving the problem) In order to solve the problem described in L, the present invention connects an interlocking cable to the grip-side tip of each wire, and connects two sprockets to the grip so that they can rotate freely. At the same time, the drive handle is rotatably supported, each of the meshing type cables is wound around each sprocket, and the tips of the cables are urged to pull the wire by a tension spring, and each sprocket is rotated. Each is operatively connected to a drive handle via a clutch R structure.

(Example) FIG. 9 shows an overall plan view of a fiberscope, in which a connecting tube 2 extending forward is connected to the grip 1, and an objective section 3 is provided at the front end of the connecting tube 2. An eyepiece section 5 is provided at the rear end of the grip 1. A flexible portion 2a having a certain length is formed at the front end of the connecting tube 2, and is bendable in the left-right direction as shown by the imaginary line.

In FIG. 10 showing an enlarged horizontal sectional view of the flexible portion 2a,
A large number of knot rings 6 are arranged on the same axis at intervals in the front-rear direction on the flexible portion 2a, and each knot ring 6
Arc-shaped receiving recesses 7 are formed at the upper and lower ends of both the front and rear surfaces of the roller, and a vertical roller shaft 8 is disposed between the four parts 1. The full ring 6 is connected in the axial direction by two L lower fastening wires 10 extending in the front-rear direction, and is rotatable in the left-right direction about each roller shaft 8 as a rotation fulcrum.

Operation wire offshore through holes 11 and 11 are formed at both left and right ends of each node ring 6, respectively.
The wire 15 and the second right collar wire 16 are inserted. The front end heads 15a, 16a of each operating wire 15.1G engage with the node ring 6 at the front end, and the operating wire 15.16
The rear end portion extends rearward within the connecting duplex 2.

Further, an image guide 18 and a light guide 19 are built into the connecting tube 2, and the front ends of both guides 18 and 19 extend into the objective part (objective hardware) 3 through the center hole of the node ring 6. The rear end of the image guide 18 extends to the eyepiece 5 in FIG. 9, and the light guide 19 in FIG. 10 passes through the grip 1 in FIG. 9 and is connected to a light source.

FIG. 8 shows a longitudinal cross-sectional view of the grip 1. The grip 1 is integrally provided with a transmission case 20 within a grip body 21, and a case lid 20a is fixed onto the transmission case 20. The wires 15 and 164 are inserted into the grip body 21 from the front of the grip 1.

In FIG. 1 showing the eighth I-I sectional view (horizontal sectional view), inside the transmission case 20 there are a pair of left and right first and second
Drive shafts 31 and 32 are rotatably supported, and each drive shaft #J shaft 3
1.32, respectively, are fixed to the first and second chains 33, 34. A bracket 24 is fixed to the portion of the grip body 21 in front of the transmission case 20, and A pair of left and right guide tubes 27.27 are fixed, and each guide tube 27.27
Outer tubes 22 and 23 extending forwardly at t and t are respectively fixed. Each wire 15.16 is inserted into the grip body 21 through an outer tube 22.23 and a guide tube 27.27, respectively.

At the rear end of each wire 15.16, first and second chains 28.29 each having a certain length are connected to a connecting terminal 26.2.
They are connected via 6. The first chain 28 extends tangentially and is wound around the rear half of the first sprocket 33 clockwise for half a turn, and the second chain 29 extends around the first chain 28.
The second sprocket 34 extends parallel to the rear immediately beside the second sprocket 34.
It is wrapped half a turn counterclockwise around the second half of the . Each block 1
First and second coil springs 35.
36 are connected to each other, and each spring 35, 36 extends forward and engages a locking pin 37 of the bracket 24, respectively.

The ■-■ cross section of Figure 1 is shown. In Figure 2, each drive shaft 3
1.32 is rotatably supported by the intermediate wall 20b of the transmission case 20 and the case lid 20a, and the sprockets 33, 34 are fixed to the drive shaft portion below the intermediate wall 20b.

Middle g! The first worm 4! is attached to the first drive shaft 31 portion above 20b. t740, 1st shift fh IJ-74
2 and the first fixing sleeve 45 are arranged in this order. The first worm gear T740 is rotatably fitted to the first drive @31, and the first moving sleeve 42 is rotatably and axially movably fitted to the first drive shaft 31,
It is always engaged with the first worm gear 40 so as to rotate integrally therewith (for example, spline engagement). 1st
A first clutch spring 50 is compressed between the worm gear A740 and the first moving sleeve 42, and urges the moving sleeve 42 upward. The first fixing sleeve 45 is fixed to the first drive shaft 31 with bolts. Both sleeves 42.
Sawtooth-shaped ratchet teeth 44 and 44 are formed on opposing surfaces of the sleeves 45 and 45, respectively, so that only the rotation of the first movable sleeve 42 in the direction of arrow A2 can be transmitted to the first fixed sleeve 45. There is.

In order to move the first moving sleeve 42 downward, the upper annular step 42a of the first moving sleeve 42 has a first
The switching fork 48 is in abutment.

That is, by pressing the first moving sleeve 42 downwardly against the flag-spring 50 with the first switching fork 48, the two wedge teeth 44, 44 can be kept in a non-meshing state.

The second drive shaft 32 is also provided with a second worm gear X741 on the same side as the first drive shaft 31, a second moving sleeve 43, a second clutch spring 51, a second fixed sleeve 46, and a second switching fork 49. Also both power 2 sleeve 43.4
6 are provided with respective sawtooth-shaped second ratchet teeth 47.47, the flanks of which are similar to the first ratchet teeth 44.44. The second movable sleeve 143 is tilted in the opposite direction, so that only the rotation of the second movable sleeve 143 in the direction of arrow B2 is transmitted to the second fixed sleeve 46.

Both ohms A! A horizontal worm 53 is rotatably supported by the gear 40.41, and meshes with both worm gears 40.41 at the same time.

A drive handle 54 outside the transmission case is integrally fixed to the worm 53.

In FIG. 3 showing the mm-m cross section of FIG. 2, the front ends of both switching forks 48 and 49 are supported on a horizontal support shaft 56 so as to be rotatable in the vertical direction, and the intermediate portions in the front and back direction are 1st, 20th-759. through bins 57.58, respectively.
60 is rotatably provided. Each L1-L59.
The free ends of leaf springs 61 and 62 are in contact with the lower surface of each of the leaf springs 60, and the elastic force of the leaf springs 61 and 62 causes [l
- The switching fork 48.49 is urged upward via the rubber 59.60.

The front ends of the leaf springs 61 and 62 are fixed to the transmission case 20, and the intermediate portions in the front-rear direction contact the upper surface of the support shaft 56, and the rear portions bend in the upward F direction (deflecting) using the contact portions as fulcrums.

A cam disk 66 is rotatably arranged above the rollers 59 and 60, and a [1-ra 59
．． An annular cam surface that abuts on 60 is formed.

In FIG. 4 showing the IV-IV cross section of FIG. 3, the cam disk 66 is fixed to a vertical shaft 67, and the shaft 67 is
It is rotatably supported on the L end of the knob 65.
The body has -.

The knob 65 can be placed in the neutral position as shown in Fig. 5, in the left lock position as shown in Fig. 7, which is rotated 45° from the neutral position toward the direction indicated by the arrow, and, although not shown, in the left lock position, which is rotated 45° from the neutral position toward the direction indicated by the arrow [11R]. It can be freely rotated to the right lock position.

A convex portion 71 and a concave portion 70 are formed on the annular cam surface of the cam disk 66, and when in the neutral position as shown in FIG.
The -ra 59 and 60 are in contact with the protrusion 71 and are pushed downward, and when the left lock position shown in FIG. 59 fits into the recess 70 and moves upward. In addition, when the right lock position is in place, the left side 11th collar 59 is in contact with the convex portion 71, contrary to the left side lock position shown in FIG.
- The rubber 60 fits into the recess 70 and moves upward.

Next, the operation will be explained.

Use the objective section 3 in a straight position as shown by the solid line in Figure 9]
In this case, the knob 65 is placed in the neutral position as shown in FIG. Since both rollers 59, 60 are pushed in the direction F by the convex portion 71, both switching forks 48, 4 push the first and second moving sleeves 42, 43 downward, respectively, as shown in FIG. Second ratchet tooth 44.44 and 47.4
7 is kept in a non-meshing state. Therefore, rotating the drive handle 54 in any direction will not rotate the sprockets 33,34. Moreover, as shown in FIG. 1, both wires 15 and 16 are pulled backward by the tensile force of the coil springs 35 and 36, and maintain their tension, so that the objective section 3 shown in FIG. The condition is maintained reliably, and there is no need to worry about it swinging from side to side.

When bending the objective section 3 to the left, the knob 65 is rotated in the direction indicated by the arrow to the left lock position as shown in FIG. As a result, the first U-ra 59 on the left side is fitted into the recess 70, and the first fork 48 is rotated upward by the elastic force of the leaf spring 61, as shown in FIG.

Thereby, the first moving sleeve 42 of FIG. 2 is moved upwardly by the elastic force of the first clutch spring 50, and the first ratchet teeth 44, 44 engage. That is, the first sprocket 33
The clutch engages. On the other hand, the force 2 radiet teeth 47 and 47 are kept in a non-meshing state.

When the drive handle 54 is rotated in the direction of arrow A1 in the above state, both the first and second worms 40141 move to A2.
The rotational force of the second worm 41 is interrupted at the second moving sleeve 43, but the rotational force of the first worm 40 is transferred to the first moving sleeve 42, the first radiant teeth 44, 44,
It is transmitted to the first sprocket 33 via the fixed sleeve 45 and the first drive shaft 31, and rotates the first sprocket 33 in the direction of arrow A2 in FIG. As a result, the first Y ~ 71
5 is pulled rearward through the first chain 28, bending the objective section 3 to the left as shown in phantom lines in FIG.

When the objective section 3 bends to the left, the second wire 16 in FIG. 1 is inevitably pulled forward because the second drive shaft 32 is in a rotatable state (so-called free state). . At this time, a constant tension is always applied by the action of the second tension spring 36, so that the second wire 16 does not slacken.

When bending the objective section 3 to the right, turn the switching knob 65 in FIG. Connect the clutch on the 34 side.

By rotating the drive handle 54 in the direction of arrow B1, both barley barley 1740, 41 are rotated in the direction of arrow B2. As a result, only the second sprocket 34 in FIG. 1 rotates in the direction of arrow 82, pulling the second wire 16 through the second chain 29.

(Another embodiment) (1) In the illustrated embodiment, a chain is used as the interlocking cable, but it is also possible to use a so-called timing belt or an interlocking cable with holes and protrusions. You can also do it.

(2) Due to the worm gear rock structure, it is also possible to use a bevel gear A7 type transmission mechanism in addition to the transmission mechanism.

(Effects of the Invention) As explained above, according to the present invention, two (1) interlocking cables such as the Cheno 28 (29) are connected to the Y-715 (16), and the cables are connected to the sub [ Since the object part 3 is curved by winding the wire 1-33 (34) and pulling the wire 15 (16), there is no slippage compared to the conventional structure in which the wire is wound directly. It can be reeled up reliably and has good operating performance.

(2) When the wire 15 is pulled by the sub-L"kerat 33 equipped with a pair of sprockets 33 and 34,
The wire 16 on the loose side is kept under a certain tension by the spring 36, so that the wire 71 on the loose side is kept in a free state.
6 will no longer sag.

In other words, compared to the conventional structure in which two wires are moved by one sprocket, the wires 15 and 16 are always kept in a constant state of tension, and the wires 15 and 16 are always kept in a good state with constant tension, and the wires 15 and 16 are always kept in a good state with a constant tension. The winding angle of the wires 15 and 16 can be kept constant at all times.Therefore, the reliability and responsiveness of the operation are improved, and the durability of the wires 15 and 16 is also improved.

(3) Each sprocket 33.34 is equipped with a clutch mechanism, and each chain 28.29 is connected to a spring 35.3.
6, so by disengaging both clutch mechanisms and keeping both sprockets 33 and 34 in a free state, approximately equal tension is applied to both wires 15 and 16, and the objective part 3 is accurately moved. can be kept straight.

That is, the return performance of the objective section 3 to the straight state is good.

[Brief explanation of the drawing]

Fig. 1 is a horizontal sectional view (II sectional view in Fig. 8) of a grip of a fiberscope to which the present invention is applied, Fig. 2 is a sectional view taken along ■ - ■ in Fig. 1, and Fig. 3 is a sectional view taken along ■-■ cross-sectional view of
Fig. 4 is a cross-sectional view taken along IV-IV in Fig. 3, Fig. 5 is a cross-sectional view taken along v-■ in Fig. 4, and Fig. 6 is a cross-sectional view taken along the line V-■ in Fig. 4.
Figure 7 is a cross-sectional view equivalent to IV-IV in Figure 6, and ■-Vl in Figure 6.
8 is a sectional view taken along the line 1--2 in FIG. 1, FIG. 9 is a plan view of the entire fiberscope, and FIG. 10 is a horizontal sectional view of the front end portion of FIG. 9. 1...Grip, 2...
Connection tube, 3... Objective part, 5... Eyepiece part, 15
．． 16... Operation wire, 28.29... Cheno (an example of interlocking cable), 33.34... Sprocket, 35.36... Spring, 42.43.44.47.・
・, Moving sleeve, ratchet teeth (an example of a clutch mechanism), 54... Drive handle

Claims (1)

[Claims] A fiberscope in which two wires are engaged with the tip of the objective section, and by pulling one wire, the objective section is curved to one side, and by pulling the other wire, the objective section is curved to the other side. In the remote control device, an interlocking cable is connected to the tip end of each wire on the grip side, the grip rotatably supports two sprockets, and the drive handle is rotatably supported, and each sprocket has the above-mentioned sprockets. As each meshing type cable is wrapped around the cable, the tip of the cable is biased to pull the wire by a tension spring, and each sprocket is interlocked and connected to the drive handle via a clutch mechanism. Features a fiberscope remote control device.