JP3278840B2 - Endoscope bending operation device - Google Patents

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, and more particularly to a bending operation of an endoscope insertion end by operating a left and right angle knob and a vertical angle knob attached to a hand operation portion of the endoscope. The present invention relates to an endoscope bending operation device that bends a section in a desired direction.

[0002]

2. Description of the Related Art A bending portion is connected to an insertion portion connected to a hand operation portion main body of an endoscope. The bending portion is provided with left and right angle knobs and up and down angle knobs provided on the hand operation portion main body. It is bent by operation, and the distal end hard portion of the bending portion is directed in a desired direction.

[0003] A D-type pulley 1 shown in FIG. 4 disposed in a hand operation unit is connected to the left and right angle knobs and the up and down angle knobs, and the pulley 1 is rotated by the angle knob. The hard distal end portion can be directed in a desired direction by the pulling wire 2 for bending operation wound around. Further, the pulling wire 2 is fixed to the pulley 1 by a screw 5 screwed into the flat surface portion 3 of the pulley 1 via a washer 4.

[0004]

However, in the conventional bending operation device for an endoscope, the screw 5 is screwed into the pulley 1 at a position behind the main body of the operation unit. When screwing into the handpiece 1, the eyepiece, the light guide cable, and the like attached to the rear of the hand operation unit main body must be removed.

[0005] As a result, the conventional bending operation device for an endoscope has the disadvantage that it takes time to fix the pulling wire. The present invention has been made in view of such circumstances,
An object of the present invention is to provide a bending operation device of an endoscope that can fix a pulling wire to a pulley without removing an eyepiece or the like from a hand operation unit of the endoscope.

[0006]

According to the present invention, in order to achieve the above object, a pulling wire for bending operation is attached to each of pulleys connected to the left and right angle knobs and the up and down angle knobs of the endoscope hand operation unit. The tow wire is wound in a bending operation device of an endoscope in which the bending portion at the distal end of the endoscope insertion portion is bent in a desired direction by rotating and fixing each of the angle knobs. A concave portion is formed in the outer peripheral portion of the pulley, and a tubular member having a through-hole for a pulling wire is fitted into the concave portion from a direction orthogonal to a winding direction of the pulling wire, and an endoscope corresponding to the concave portion. The pulling wire is fixed to the pulley by inserting a fixing member into the cylindrical member and fixing the pulling wire to the cylindrical member from an opening formed in a side portion of the hand operation unit.

[0007]

According to the present invention, first, the tubular member is fitted into the concave portion formed on the outer peripheral portion of the pulley, and then, the pulling wire is inserted into the through-hole for the pulling wire of the cylindrical member, and the pulling wire is inserted. The winding member is wound around a pulley, and then a fixing member is inserted into the tubular member through an opening formed on a side portion of the endoscope hand operation portion to fix the pulling wire to the tubular member.

Thus, in the present invention, since the pulling wire can be fixed to the pulley from the side of the endoscope hand operation unit, it is not necessary to remove the eyepiece and the like from the endoscope hand operation unit at the time of fixing. .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a bending operation device for an endoscope according to the present invention will be described below with reference to the accompanying drawings. FIG.
1 is an overall view of an endoscope to which a bending operation device for an endoscope according to the present invention is applied.

The insertion section 1 is provided on the main body 10 of the operation section of the endoscope.
2 are connected to a base end, and a distal end hard portion 16 is connected to a distal end of the insertion portion 12 via a curved portion 14. Further, a light guide 18 is connected to the hand operation unit main body 10. The distal end portion of the light guide 18 is inserted from the hand operating portion main body 10 to the distal end hard portion 16 via the insertion portion 12 and the bending portion 14, and illuminates an affected part or the like from the distal end portion of the distal end hard portion 16. Further, an eyepiece 20 is formed at the rear end of the hand operation unit main body 10.

A left and right angle knob unit 22 and a vertical angle knob unit 24 are mounted on both side surfaces of the hand operation unit main body 10. Since the left and right angle knob units 22 and the upper and lower angle knob units 24 are formed of the same member, only the configuration of the left and right angle knob units 22 will be described here, and the description of the upper and lower angle knob units 24 will be omitted.

As shown in FIG. 2, the left and right angle knob unit 22 has an angle knob 26 and a brake lever 28 formed in an annular shape, and a knob seat 30 is fixed to the angle knob 26 by screws 32, 32. . An annular brake collar 34 is fixed to the brake lever 28 by screws 36, 36... A brake ring 38 is integrally fixed to the brake collar 34 by a set screw 40. The brake ring 3
The front end of the rotary shaft 42 is loosely fitted in the connector 8.

A flange 44 is formed substantially at the center of the outer periphery of the rotary shaft 42, and brake pads 46 and 48 formed in an annular shape are arranged on both sides of the flange 44. In addition, the rotating shaft 42 is configured such that the brake ring 38
It is arranged in the fixed seat 50 by being screwed to zero. As a result, the brake pad 46 is held between the brake ring 38 and the flange 44, and the brake pad 48 is held between the flange 44 and the fixed seat 50, and moves back and forth in the axial direction of the rotary shaft 42. It is possible.

The rotary shaft 42 has a front end portion having a screw 5
2 and the rear end portion is fixed to the knob seat 30 via a rotation restricting plate 56 by a screw 54.
It is rotatably mounted inside. As a result, the brake mechanism including the angle knob 26 and the brake lever 28 and the like are integrally assembled into a unit, and when the angle knob 26 is rotated, the rotation shaft 4 is rotated via the knob seat 30.
When the brake lever 28 is rotated, the brake ring 38 moves back and forth with respect to the fixed seat 50 by the action of the screw between the brake ring 38 and the fixed seat 50. The flange 44 can be pressed by the brake pads 46 and 48, and can be released (released). Thus, the rotation of the rotating shaft 42 is restricted by the pressing force of the brake pads 46 and 48.

On the other hand, the angle knob 26 is
The rotation range is regulated by a stopper pin 58 fixed to the rear end of the motor. The stopper pin 58 is located in a not-shown notch formed in the rotation restricting plate 56, and when the rotation restricting plate 56 rotates together with the rotary shaft 42, both side edges of the notch contact the stopper pin 58. Thereby, the rotation range of the rotating shaft 42 is restricted, so that the rotation range of the angle knob 26, that is, the bending range of the bending portion 14 shown in FIG.

The rotation range of the brake lever 28 is regulated by a stopper pin 64 fixed to the front surface of the fixed seat 50. This stopper pin 64
The brake collar 34 is located in a notch groove (not shown) formed in the brake collar 34. When the brake collar 34 rotates, both side edges of the notch groove contact the stopper pins 64. As a result, the rotation range of the brake collar 34 is restricted, so that the rotation range of the brake lever 28 is restricted.

Further, a driving force transmitting pin 74 is provided on the rotating shaft 42 through a hole 76 of the rotation regulating plate 56.
The pin 74 is used to pull the pulley 1 when the angle knob unit 22 is mounted on the mounting portion 11 of the hand operation unit main body 10.
00A is inserted into the pin hole 102. Hand operation unit body 1
The angle knob unit 22 attached to the screw 0
It is fixed to the hand operation unit main body 10 by 8, 78, 78. The cap 80 is engaged with the opening 26A of the angle knob 26.

The pulley 100A is arranged on one side of a main plate 104 fixed in the longitudinal direction in the main body 10 at the hand, and is connected to the upper and lower angle knob units 24 on the opposite side of the main plate 104. Pulley 100B
Is arranged. The pulleys 100 </ b> A and 100 </ b> B have shafts 108 fixed to the holes of the main plate 104 by screws 106.
Are rotatably supported at both ends, and pulling wires 110 and 112 for bending operation are wound respectively.

The pulleys 100A and 100B are formed in a disk shape as shown in FIG.
A concave notch 120 is formed in the outer periphery around which 0 and 112 are wound. A cylindrical collar 122 is fitted into the notch 120 from a direction perpendicular to the winding direction of the pulling wires 110 and 112. The collar 122 has a wire through hole 124 through which the pulling wires 110 and 112 are inserted.
And the pulling wires 110 and 112 are inserted through the wire through holes 124 so that the pulleys 100A and 100B
Wound around. In addition, pulling wires 110 and 112 are connected to pulleys 126 and 128 arranged in the operation unit main body 10 at hand.
130, with a turnbuckle 13 at each end.
2, 132, the pulling wires 134, 134 are connected. The distal ends of the pulling wires 134 are connected to the bending portion 14 via the insertion portion 12.

As shown in FIG. 1, openings 136 and 136 (one of the openings 136 are not shown) are formed on both sides of the main body 10 at the hand. This opening 136
Is the notch 12 of the pulleys 100A and 100B shown in FIG.
0, and the opening 13
Screws 138, 138 are inserted from 6, 136. The screws 138, 138 are screwed into the collars 122, 122 shown in FIG. 2 from the outside of the hand operation unit main body 10, and can fix the pulling wires 110, 112 to the collars 122, 122. Thereby, the pulling wires 110, 1
12 is wound around pulleys 100A and 100B and fixed.

As described above, the bending operation device for an endoscope according to the present embodiment includes the screws 138, 1
38 to insert the pulling wires 110 and 112 into the pulley 10
0A and 100B can be fixed. Therefore, in this embodiment, the pulling wire can be easily fixed to the pulley as compared with a conventional endoscope bending operation device in which the eyepiece and the like must be removed from the hand operation unit main body when the pulling wire is fixed. Can be.

In this embodiment, since the pulling wire 110 (112) is inserted through the wire through hole 124 of the collar 122, even if an axial force is applied to the collar 122, the pulley 100A (100B) ) Will not fall out. The pulley 100 is attached to the collar 122.
A (100B) even when a tangential force is applied
22 is guided by the notch 120, so that the color 1
22 does not fall off the pulley 100A (100B). Therefore, after assembly of the bending operation device, the collar 122
And the pulling wire 110 (112) is connected to the pulley 100A (10
0B) or falling off.

In the bending operation device for an endoscope according to the present embodiment, the screws 138 are loosened and the pulling wires 110 and 112 are slid with respect to the pulleys 100A and 100B, thereby pulling the pulleys 100A and 100B without rotating them. Wire 11
Fine adjustments of 0 and 112 can be made. This allows
Since the fine adjustment can be performed while maintaining the neutral position of the angle knob 26, each time the fine adjustment is performed, the angle knob 2 can be adjusted.
6 can be saved in comparison with a conventional bending operation device of an endoscope, which has to be reattached to a neutral position.

[0024]

As described above, according to the bending operation device for an endoscope according to the present invention, the tubular member is fitted into the concave portion formed on the outer peripheral portion of the pulley, and the tubular member is inserted through the pulling wire. Insert the pulling wire through the hole, wind the pulling wire around the pulley, insert the stopper member into the tubular member from the opening formed on the side of the endoscope hand operation unit, and fix the pulling wire to the tubular member I do. That is, according to the present invention, since the towing wire can be fixed to the pulley from the side of the endoscope hand operation unit, the tow wire is fixed to the pulley without removing the eyepiece and the like from the endoscope hand operation unit. be able to.

[Brief description of the drawings]

FIG. 1 is an overall view of an endoscope to which a bending operation device for an endoscope according to the present invention is applied.

FIG. 2 is a cross-sectional view of a bending operation device for an endoscope according to the present invention.

FIG. 3 is an assembled perspective view of a pulley applied to the bending operation device of the endoscope according to the present invention.

FIG. 4 is a perspective view of a pulley applied to a conventional bending operation device for an endoscope.

[Description of Signs] 10: Hand operation unit main body 22, 24 ... Angle knob unit 100A, 100B ... Pulley 110, 112 ... Pulling wire 120 ... Notch 122 ... Collar 124 ... Wire through hole 138 ... Screw

Claims (1)

(57) [Claims] 1. A pulling wire for bending operation is wound around and fixed to each pulley connected to the left and right angle knobs and the up and down angle knobs of the endoscope hand operation unit, and the inner knob is rotated by rotating each angle knob. In a bending operation device of an endoscope that bends a bending portion at a distal end of an endoscope insertion portion in a desired direction, a concave portion is formed in an outer peripheral portion of the pulley around which the pulling wire is wound, and the concave portion is pulled. A tubular member having a wire through-hole formed therein is fitted in a direction perpendicular to the winding direction of the pulling wire, and a fixing member is inserted through an opening formed in a side portion of the endoscope hand operation unit corresponding to the concave portion. A bending operation device for an endoscope, wherein the pulling wire is fixed to the pulley by inserting the wire into the cylindrical member and fixing the pulling wire to the cylindrical member.