JPH06169884A - Curving operation device for endoscope - Google Patents

Abstract

PURPOSE:To provide high interchangeability allowing the use of a device in common, even for models or the like having a maximum curvature angle substantially different from each other. CONSTITUTION:This device is provided with the first slit 35b formed on the fixed part 14 of an operation section, a stationary member 32a screwed and fixed to the arbitrary position of the first slit 35b, and a stopper member 32b formed for restricting the motion range of a curving operation means in such a way as having the second slit 32c in the same direction as the first slit 35b, and allowing the screwing and fastening thereof to the arbitrary position of the stationary member 32a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending operation device for an endoscope.

[0002]

2. Description of the Related Art In a bending operation device for an endoscope, it is necessary to adjust the maximum bending angle of a bending portion during assembly.

Therefore, conventionally, a slit is formed in the side wall portion of the bending operation device protruding from the operation portion, and a stopper for restricting the rotation range of the bending operation knob is screwed at an arbitrary position of the slit. By making it possible to fix it and shifting the screw fixing position appropriately,
The maximum turning range of the bending operation knob is adjusted to adjust the maximum bending angle (Japanese Patent Laid-Open No. 63-130035).

[0004]

For example, the maximum bending angle of an endoscope for examining the digestive tract is 16 in the vertical direction.
Many products have specifications of 0 to 210 degrees.

Therefore, conventionally, the maximum bending angle adjusting device as described above is used to increase the maximum bending angle in the vertical direction from 160 degrees to 2 degrees.
It was configured to be adjustable within a range of about 10 degrees. But,
Even with an endoscope for digestive tract examination, depending on the model, the maximum bending angle is, for example, 210 degrees upward and 120 degrees downward.
There are also specifications such as degrees.

Then, the maximum bending angle as described above is 160
Since it is not possible to use a bending operation mechanism configured in an adjustment range of degrees to 210 degrees, a bending operation mechanism incorporating another stopper capable of setting the maximum bending angle to 120 degrees is prepared and used.

Therefore, due to the difference in the maximum bending angle,
A different type of bending operation mechanism is required, resulting in high manufacturing and management costs. Further, since the stopper cannot be seen from the outside of the bending operation mechanism, it is necessary to put an identification mark on each bending operation mechanism so that the bending operation mechanism is not mistakenly incorporated. Therefore, the management is very complicated.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a bending operation device for an endoscope, which has a high compatibility and can be commonly used even if there are models having different maximum bending angles.

[0009]

In order to achieve the above object, a bending operation device for an endoscope according to the present invention connects a bendable bending portion formed at a distal end of an insertion portion to a base end of the insertion portion. In the bending operation device for an endoscope, the operation wire is pulled through the operated operation part, and the bending operation means provided in the operation part is moved to pull the operation wire to bend the bending part. , A first slit formed in a fixed portion of the operation portion, a fixing member which is screwed and fixed at an arbitrary position of the first slit, and a screwing can be fixed at an arbitrary position with respect to the fixing member The second slit is provided in the same direction as the first slit, and a stopper member for restricting the movement range of the bending operation means is provided.

[0010]

Embodiments will be described with reference to the drawings. FIG. 2 shows the entire configuration of the endoscope, and the insertion portion 1 made of a flexible tube.
A bendable bending portion 2 is formed at the tip of the insertion portion 1, and an operation portion 3 is connected to the base end of the insertion portion 1.

A pair of up / down bending operation wires 4 and a pair of left / right bending operation wires 5 are inserted into a guide tube (not shown), and each of the bending portions 2 passes through the insertion portion 1 and inside the operation portion 3. Have been drawn to.

By rotating the up / down bending operation knob 6 and the left / right bending operation knob 7 which are the bending operation means projectingly superimposed on the operation portion 3, the operation wires 4 and 5 are pulled and bent. The part 2 can be bent at a desired angle in a desired direction.

FIG. 3 shows the construction of the bending operation device.
The present invention is embodied in a device for vertical bending. The operation unit main body 11 includes a bearing body 14 that serves as a bearing for vertical bending operation,
A shaft body 15, which serves as an axis for the left-right bending operation, is fixed by screws and is provided so as to project outward.

Further, the bottom plate 17 of the bending operation device and the frame 16 of the operation portion, which are formed in a flange shape on the shaft body 15, are fixed to the operation portion main body 11 with the screws.

The bearing body 14 forms a circular chamber in the operating portion main body 11 in which an open portion 14a is formed below, and a pulley 18 for vertical bending and a pulley 19 for horizontal bending rotate therein. It is freely accommodated.

Circumferential grooves 20 are formed in two rows on the outer peripheries of the pulleys 18 and 19, and the operation wires 4 and 5 are wound in the grooves 20 so that the operation wires 4 and 5 are wound. The ends are fixed to the pulleys 18 and 19.

Reference numeral 22 denotes a rotary shaft (hereinafter referred to as "vertical rotary shaft") for vertically bending operation, which is provided on the outside of the operation portion main body 11 so that the vertical bending operation knob 6 is screwed to the protruding end portion. It is fixed.

The vertical rotation shaft 22 is rotatably fitted in the bearing body 14 and is connected to the vertical bending pulley 18 via an angular shaft 23 so as to rotate integrally.

A rotary shaft 25 for left / right bending (hereinafter referred to as a “rotary shaft for left / right”) 25 is freely rotatable on the shaft body 15 with an O-ring 24 for waterproofing being sandwiched inside the rotary shaft 22 for vertical movement. Is fitted to.

The left and right bending operation knob 7 is fixed to the projecting end with screws, and the left and right bending pulley 19 is connected to the other end through an angular shaft 26 so as to rotate integrally. ing.

With the above-described structure, when the vertical bending operation knob 6 is rotated, the pulley 18 is rotated via the vertical rotation shaft 22 to pull the operation wire 4, and the bending portion 2 is moved upward or downward. To bend. Similarly, when the left / right bending operation knob 7 is rotated, the bending portion 2 bends leftward or rightward.

The groove 2 around which the operation wires 4 and 5 are wound
0 has a depth which is several times the diameter of the operation wires 4 and 5, and the slack of the operation wires on the loose side is caused by the groove 20.
Is absorbed within.

Reference numeral 30 denotes a maximum bending angle adjusting mechanism for restricting the maximum rotation angle of the vertical bending operation knob 6,
4 and 5 show cross sections AA and BB of FIG.
Indicates a partial cross section of CC (inner portion). Figure 6
FIG. 3 is an exploded perspective view of components arranged inside the bearing body 14.

In this mechanism, as shown in FIG. 1, a pair of slits (oblong holes) are formed in the circumferential direction of the bearing body 14 which is a fixing member for the operating portion 3 along with the rotating direction of the vertical bending operation knob 6. ) 35a, 35b are formed.

An upward stopper 31 has two screws 40 in the slit 35a (for upward bending).
It is fixed in contact with the inner surface of the bearing body 14 by a. 36a is an auxiliary plate instead of a washer.

The interval between the two screws 40a is the slit 3
Since the two screws 40a are narrower than the length of 5a and are passed through the slit 35a, the upward stopper 31
Can be fixed to the position by shifting the screw 40a to an arbitrary position with respect to the slit 35a and tightening the screw 40a.

In the other slit 35b (for downward bending), the fixing member 32a is held by the two screws 40b with the downward stopper 32b interposed therebetween.
It is fixed in contact with the inner surface of 4. 36b is an auxiliary plate instead of a washer.

The interval between the two screws 40b is the slit 3
Since the two screws 40b are narrower than the length of 5b and are passed through the slit 35b, the fixing member 32a is displaced to an arbitrary position with respect to the slit 35b (movable range θ).
1) The screw 40b can be tightened and fixed in that position.

The downward stopper 32b is provided with a screw 4 in the same direction as the slit 35b formed in the bearing body 14.
A slit (long hole) 32c having a width longer than the interval of 0b is formed, and the two screws 40b are passed therethrough.

Therefore, the downward stopper 32b is
Shift the screw 40 to an arbitrary position with respect to the fixing member 32a.
b can be tightened and fixed in that position. Alternatively, a threaded rod formed with a male screw may be erected from the fixing member 32a, and the nut may be tightened from the outer end side of the threaded rod.

As a result, as shown in FIG. 1, the fixing member 32a can be adjusted with respect to the bearing body 14 within the range of θ1, and the downward stopper 3 can be adjusted with respect to the fixing member 32a.
Since 2b can be adjusted within the range of θ2, the fixed position of the downward stopper 32b with respect to the bearing body 14 is (θ1 + θ2).
Can be adjusted in a wide range of.

As shown in FIG. 6, a projection 37 is provided on the upper surface of the vertical bending pulley 18, and a floating member 34 is provided between the pulley 18 and the vertical direction stoppers 31 and 32b. Is rotatably inserted. 33 is the pulley 18 and the floating member 34 so that the floating member 34 does not tilt.
Is a spacer interposed between and.

The upper and lower stoppers 31 and 32b are each formed in a fan-shaped tube with a collar. On the other hand, the floating member 34 has a protruding piece 38 that abuts the protrusion 37 of the pulley 18 shown in FIGS. 6 and 4, and stoppers 31 and 3 for up and down directions shown in FIGS. 6 and 5.
The projecting piece 39 that abuts the 2b is formed by bending in opposite directions.

The maximum angle adjusting mechanism 3 constructed in this way
When the vertical bending operation knob 6 is rotated, the pulley 18 is rotated via the vertical rotation shaft 22, and the projection 37 pushes the protruding piece 38 of the floating member 34 to rotate the pulley 18.
And the floating member 34 rotate integrally, and the floating member 34
The protruding piece 39 of the upper stopper 31 or 3 for the upper or lower direction
Stop when you hit 2b.

In this way, the maximum rotation angle of the vertical bending operation knob 6 is regulated, and the stoppers 31, 3 are fixed by the screws 40.
By adjusting the fixed position of 2b, it is possible to arbitrarily adjust the maximum bending angle of the bending portion 2 in the vertical direction.

In this case, the maximum bending angle in the upward direction can be adjusted, for example, in the range of 160 degrees to 210 degrees, whereas the maximum bending angle in the downward direction can be adjusted in the downward direction.
2b can be adjusted in a wide range, for example, 120 degrees to 2
It can be adjusted in a large range of 10 degrees.

Returning to FIG. 3, reference numeral 77 is a maximum angle adjusting mechanism 3 for vertical bending so that water does not enter the operating portion 3 from the outside.
0 is a cover cylinder for watertightly covering the outer surface,
0 and 81 are O-rings for sealing.

Inside the cover cylinder 77, screws 40a and 40b for fixing the adjusted state of the maximum angle adjusting mechanism 30.
Is located. Then, as shown in FIG. 7 showing a partial cross section (outer side portion) of CC in accordance with the positions of the screws 40a and 40b, a pair of tool passage slits 7
8 is provided in the cover cylinder 77 symmetrically by 180 degrees.

Reference numeral 60 denotes a seal lid for sealing the tool passage slit 78, which is arranged so as to surround the cover cylinder 77 from the outer peripheral surface side and fixed to the cover cylinder 77 by a seal lid fixing screw 61. There is.

The seal lid 60 is composed of an elastic packing 60a fitted in the tool passage slit 78 of the cover cylinder 77, and a metal or plastic pressing plate 60b provided on the outer surface side of the packing 60a. .

A pair of seal lids 60 are provided symmetrically with respect to the tool passage slit 78 in a 180-degree symmetry, and are held by seal lid fixing screws 61 near both ends of each holding plate 60b.

Further, at the mouth of the screw hole on the side of the cover cylinder 77 for receiving the seal lid fixing screw 61, a small sealing O is provided.
A ring 45 is attached to prevent water from entering the inside through the seal lid fixing screw 61.

As shown in FIG. 3, left and right rotating shafts 25
A case 52 is watertightly attached to the vicinity of the upper end of the case via an O-ring 54 for sealing. 53 is an E-shaped retaining ring. A non-rotating plate 91 is attached to the angular shaft 55 at the tip of the shaft body 15 so as not to rotate.

Reference numeral 50 denotes a left / right bending maximum angle adjusting mechanism for restricting the maximum rotation angle of the left / right bending operation knob 7,
Detailed description thereof will be omitted. Reference numeral 90 is a bending holding mechanism for left and right bending for holding the left and right bending operation knob 7 in an arbitrary rotating state, and by rotating the operating knob 94, the friction disc 92 is pressed against the rotating member 93, and As a result, a frictional resistance is applied to the left / right bending operation knob 7, and the knob 7 can be held in an arbitrary rotating state.

[0045]

According to the endoscope endoscope bending operation apparatus of the present invention, the fixing member can be screwed and fixed at an arbitrary position of the first slit formed in the fixing member of the operation portion. Since the stopper member for restricting the movement of the bending operation means is further formed with the second slit screwed and fixed at an arbitrary position with respect to the fixing member, the stopper member can be used as the fixing member of the operation portion. On the other hand, it can be fixed at an arbitrary position in a wide range including the adjustment ranges of both the first slit portion and the second slit portion.

Therefore, the same bending operation device can be commonly used for endoscopes having greatly different maximum bending angles, and the compatibility as a unit is high, so that the manufacturing cost and the management cost are greatly increased. It can be reduced.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view taken along line CC of the embodiment.

FIG. 2 is an external view of the endoscope of the embodiment.

FIG. 3 is a vertical cross-sectional view of the bending operation device according to the embodiment.

FIG. 4 is a sectional view taken along line AA of the example.

FIG. 5 is a sectional view taken along line BB of the example.

FIG. 6 is a partially exploded perspective view of the embodiment.

FIG. 7 is a CC partial exploded cross-sectional view of an example.

[Explanation of symbols]

 3 Operation part 6 Vertical bending operation knob (bending operation means) 14 Bearing body (fixed part) 32a Fixing member 32b Downward stopper (stopper member) 32c Slit (second slit) 35b Slit (first slit)

Claims (1)

[Claims] 1. An operation wire is drawn from a bendable bending portion formed at a distal end of an insertion portion to an operation portion connected to a proximal end of the insertion portion, and a bending operation means provided in the operation portion is moved. In the bending operation device for an endoscope in which the bending portion is bent by pulling the operation wire, the first slit formed in the fixed portion of the operation portion and the arbitrary first slit. Of the bending operation means, in which a fixing member which is fixed by screwing at the position of and a second slit which can be fixed by screwing at an arbitrary position with respect to the fixing member are formed in the same direction as the first slit. A bending operation device for an endoscope, comprising: a stopper member for restricting a movement range.