JPH0243488B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endoscope having a treatment tool guider operating means in the operating section.

2. Description of the Related Art An endoscope is known in which a treatment instrument guide is provided in a distal end component provided in an insertion portion of the endoscope, so that a treatment instrument such as a catheter or forceps can be guided to a target site within a body cavity. This treatment instrument guide is designed to be raised and lowered by an operating member provided in the operating section, and a rack and pinion type is often used as a conventional treatment instrument guide operating means. This rack pinion was installed along with the fluid transport tube, the treatment instrument channel, the air/water supply control member, and the suction control member on the outside of the curved wire advancing/retracting means in the operating section or on the opposite side of the curved wire advancing/retracting means.

That is, since the treatment instrument guide operating means is installed completely separate from the curved wire advancing/retracting means, there is a drawback that the operating section, especially the gripping section of the casing, is thick and the operability is poor. In addition, when assembling the operation part, inside the casing, the work of connecting the curved wire to the curved wire advance/retreat means, the work of joining the fluid transport tube between the distal end side and the operation part side, and the work of connecting the treatment instrument channel and the cleaning/disinfection channel. Although joining operations are performed, the treatment instrument guider operating means becomes an obstacle during these operations, impairing work efficiency.

This invention has been made in view of the above-mentioned circumstances, and its object is to provide a guide member in the middle of a curved wire advancing/retracting means provided in an operating section, and to connect an operating wire of a treatment instrument guide to this guide member. It is an object of the present invention to provide an endoscope in which the dead space is effectively utilized by providing the members so as to be movable back and forth, and the gripping portion of the operating portion is configured to be thin, thereby improving operability.

The present invention will be described below based on an embodiment shown in the drawings. Reference numeral 1 in FIG. 1 is an operating section of the endoscope. The operating section 1 is composed of a casing 2 formed in a hollow shape from a synthetic resin material and an operating section main body 3 housed inside the casing 2.
The distal end side of the casing 2 is formed with a grip part 4 that is gripped by the operator's left hand, and this grip part 4 is provided with a treatment instrument insertion opening body 5. Further, on the rear end side of the casing 2, an eyepiece 6, a universal cord 7, an air/water supply button 8, a suction button 9, a gas supply button 10, and bending operation knobs 11a, 11b are provided. An insertion section 12 is connected to this operation section 1.

Further, the bending operation knobs 11a and 11b are the second
As shown in the figure and FIG. 3, it is interlocked with a bending operation mechanism 13 built into the operation section 1. That is, reference numeral 14 denotes a support shaft installed upright in the operation section main body 3, which is a mounting hole 15 bored in the casing 2.
It penetrates and protrudes to the outside. An inner cylinder 16 and an outer cylinder 17 as curved shafts are rotatably fitted to the support shaft 14, and a first sprocket 18 is attached to the inner end of the inner cylinder 16. A second sprocket 19 is fitted to each end. Further, the bending operation knob 11a is fitted to the outer end of the inner cylinder 16, and the bending operation knob 11b is fitted to the outer end of the outer cylinder 17. 1. The second sprockets 18 and 19 can be selectively rotated. Further, a fixed cylinder 20 is fitted into the outer cylinder 17, and a rotating cylinder 21 serving as an operating shaft is fitted on the outside of the fixed cylinder 20. This fixed cylindrical body 20 is attached to a bracket 22.
The rotary cylinder body 21 is attached to the operating section main body 3 through a tightening ring body 24 fitted on the outside thereof and fixed to the attachment hole 15 of the casing 2 through an O-ring 23 so as to be freely rotatable. is supported by.
Furthermore, first and second annular grooves 25a and 25b are provided on the outer peripheral wall of the fixed cylinder 20, and third and fourth annular grooves 25c and 2 are provided on the outer peripheral wall of the rotating cylinder 21.
5d is provided. Elastic packings 26 are selectively accommodated in these first to fourth annular grooves 25a to 25d to adjust the rotational resistance of the rotary cylinder body 21. Further, a treatment instrument inductor operating lever 27 is fixed to the outer end of the rotary cylinder body 21 with a mounting screw 28, which is attached to the casing 2.
It extends along the outer surface of the. Further, a first link 30 constituting a connecting member 29 is fixed to the inner end of the rotating cylinder 21. As shown in FIG. 4, this first link 30 is formed of a metal plate, and has a plurality of mounting holes 31 provided at one end thereof.
It is formed of a mounting part 32 having... and a connecting part 35 which is integrally provided via a U-shaped curved part 33 protruding from the mounting part 32 and has a through hole 34 in a part thereof. The first link 30 is fixed to the rotary cylinder body 21 by the fixing screw 36 inserted through the mounting hole 31, and the connecting portion 35 has a pivot pin 37 inserted into the through hole 34. The distal end of the second link 38 is rotatably connected by the .

On the other hand, the first and second sprockets 18, 1
Midway portions of first and second chains 39 and 40 serving as means for advancing and retracting the curved wire are spanned over 9 .
And these first and second chains 39, 40
Both ends of the wires are connected to curved wires 42 through connection mechanisms 41, 41, which will be described later. The connecting mechanisms 41, 41 are constructed as shown in FIGS. 5 to 9. That is,
Reference numeral 43 denotes a partition member provided on the operating section main body 3 corresponding to the gripping section 4. This has a U-shaped cross section, and a guide member 44 (described later) is inserted through its middle side.
It is attached and fixed along the longitudinal direction of the operating section main body 3. On the outside of both sides of the partition wall member 43, passages 46 are defined in two upper and lower stages by partition walls 45. The above partition wall 45
... is the inner partition wall 45 in the width direction of the passage 46...
a and an outer partition wall 45b, and each of the partition walls 45a, 45b has its midway portion in the longitudinal direction and its end on the side of the first and second sprockets 18, 19 erected in the operating section main body 3. The first and second support parts 4
7, 48 are supported and fixed.

A mounting plate 4 is provided on the side surface of the front end side of the partition wall member 43.
9 is erected, and this mounting plate 49 has a flat plate-shaped holding member 5 whose width dimension is larger than that of the partition wall member 43.
0 is bonded and fixed. Two notches 51 are formed at both ends of the holding member 50 in the width direction, corresponding to the passages 46, respectively. In this notch 51, a hollow cylindrical regulating member 52 having a small diameter step 52a formed in the middle part in the axial direction is attached to the step 52.
a is engaged so that movement in the axial direction is restricted. This regulating member 52 is held by the end of the outer partition wall 45b so as not to come off from the notch 51. Furthermore, the regulating member 5
2, a flexible wire guide pipe 53 made of a tightly wound coil or the like is inserted over the entire length of the insertion portion 12, and its base end is inserted into the brazing material 54a.
It is fixed by brazing. A curved wire 42 is inserted through the wire guide pipe 53. The distal end of the curved wire 42 is connected and fixed to a piece (not shown) constituting the curved portion, and the proximal end is led to the passage 46. A connecting piece 55 is connected to the proximal end of the curved wire 42 guided into the passage 46, and the ends of the first and second teeth 39, 40 are connected to this connecting piece 55.

A collision member 56 is implanted in the connecting piece 55 so as to be perpendicular to the axis of the bending wire 42 . A part of this collision member 56 is connected to the operation section main body 3.
The outer peripheral surface of this projecting portion is formed into a slope 57 forming an acute angle with the end surface thereof.

On the other hand, between the first support part 47 and the second support part 48 provided upright on the operation part main body 3, there is a wall formed by bending a part of the operation part main body 3 or a separate member into an L-shape. A section 58 is provided. A support hole 59 is bored in one side of the wall portion 58 along the width direction of the operating portion main body 3, and the support hole 59 has a screw 60 having a receiving portion 60c between the screw portion 60a and the head 60b.
0 is rotatably supported via the receiving portion 60c. That is, this screw 60 has its axis parallel to the axis of the curved wire 42 and parallel to the axis of the curved wire 42.
The distal end of the threaded portion 60a is engaged with a support hole 61 formed in the second support portion 48. A stopper 6 is attached to the threaded portion 60a of this screw 60.
2 is screwed on. The height of this stopper 62 is formed to be slightly smaller than the height of the passage 46, so when the screw 60 is rotated, the stopper 62 moves forward and backward through the passage 64 without rotating. There is. Note that the passage 46 in the portion where the screw 60 is provided is defined by an outer partition wall 45b. On one side of the stopper 62 facing the partition wall member 43, there is provided the collision member 56.
A slope 63 is formed at an angle corresponding to the slope 57 of the stopper 62, and the slope 57 of the collision member 56 collides with the slope 63 of the stopper 62, causing the curved wire 42 to collide with the slope 63 of the stopper 62.
In other words, the maximum bending angle of the curved portion in the vertical and horizontal directions is regulated.

On the other hand, the head 60b of the screw 60 is provided with an engagement hole 64 that passes through the head 60b in the radial direction. A locking spring 65 made of a wire bent into a wave shape is provided in the engagement hole 64 with one end engaged therewith.
Further, the other end of the locking spring 65 is pressed against the first support portion 47 in a compressed state.
As a result, the rotation of the screw 60 is restricted by the locking spring 65, and the end surface of the head 60b is brought into pressure contact with the side surface of the wall portion 58 by the restoring force of the locking spring 65, so that the screw 60 exits from the support hole 59. movement is regulated.

In the coupling mechanism 41 configured in this way,
a bending operation knob 11a for bending the curved portion;
11b, the first and second sprockets 18,
19, and the first and second chains 39, 4
0, the curved wire 42 on one passage 46 side in the width direction of the operation section main body 3 is pulled, and the curved wire 42 on the other passage 46 side is pushed. Therefore, the curved portion is curved in the direction of the curved wire 42 being towed.
When the bending wire 42 is further towed, the slope 57 of the collision member 56 provided on the connecting piece 55 connecting the proximal end of the bending wire 42 and the first and second chains 39 and 40 is moved to the stopper 62. Since the curved wire 42 collides with the slope 63 of That is,
The maximum bending angle of the curved portion is regulated by the stopper 62. Also, the collision member 5 is attached to the stopper 62.
6 collide with each other, the screw 60 is pressed toward the second support portion 48 via this stopper 62. However, this screw 60 has a head 60
The end face of b comes into contact with the side surface of the wall portion 58, and this contact prevents it from shifting in the axial direction together with the stopper 62, so that the maximum bending angle of the curved portion becomes larger than the initially set angle. There is no danger.

On the other hand, in order to change the maximum curve angle of the curved portion, a locking spring 65 is provided in a compressed state between the first support portion 47 and the engagement hole 64 of the head 60b of the screw 60.
Remove by further compressing. next,
After rotating the screw 60 and shifting the stopper 62 toward the second support portion 48, turn the bending operation knob 11a,
11b is rotated to curve the curved portion until it reaches a predetermined curve angle. In this state, the bending operation knobs 11a and 11b are fixed, and the stopper 62
The screw 60 is rotated in the opposite direction until the slope 63 of the collision member 56 comes into contact with the slope 57 of the collision member 56.
Next, the first support portion 47 and the head 60 of the screw 60
If the locking spring 65 is again provided between the engagement hole 64 of b, the stopper 62 will be fixed in a predetermined position via the screw 60.
The maximum curvature angle of the curved portion is determined by .

In order to engage the end of the locking spring 65 in the engagement hole 64, it may be necessary to slightly rotate the screw 60 from the predetermined position.
If the pitch of 0 is made small enough, this screw 6
Since the stopper 62 hardly moves due to the slight rotation of 0, the maximum bending angle of the curved portion is not affected.

Note that if two or more engagement holes 64 are bored in the head 60b of the screw 60 in a cross shape, the end of the locking spring 65 can be inserted without rotating the screw 60. can be engaged.

On the other hand, the guide member 44 provided within the partition wall member 43 has a U-shaped cross section, and an operating wire coupling member 66 is housed inside the guide member 44 so as to be movable back and forth. As shown in FIGS. 10 and 11, this operation wire coupling member 66 includes a cylindrical portion 67 and two mounting pieces 6 protruding from one end surface of the cylindrical portion 67.
8,68. Furthermore, an insertion hole 69 is bored in the axial direction of the cylindrical portion 67, and a screw hole 70 is bored in the direction perpendicular to the insertion hole 69, and the mounting pieces 68 have through holes 71, 71 is drilled. The tip of the second link 38 as the connecting member described above is inserted between the mounting pieces 68 and 68, and the through hole 7
1 and 71, and are rotatably connected to each other by a pivot pin 72 inserted into the parts 1 and 71. Therefore, this second link 38 is in a state where it intersects with the first and second chains 39 and 40 as the curved wire advancement/retraction means. Furthermore, the distal end of a connecting rod 73 constituting a part of the operating wire coupling member 66 is inserted into the insertion hole 69 of the cylindrical portion 67, and this distal end is engaged with a tightening screw 74 screwed into the screw hole 70. Therefore, the connection is fixed. Therefore, the operating wire coupling member 66 is connected to the guide member 44 by the second link 38.
The stroke is regulated by a stopper 75 that comes into contact with the cylindrical portion 67.

Further, a first pipe fixing member 7 is provided at the front end of the guide member 44, that is, at the front end of the partition member 43.
6 is installed, and furthermore, a second pipe fixing member 77 is installed in front of the partition member 43. The first pipe fixing member 76 is attached to the mounting plate 7.
The second pipe fixing member 77 is attached to the operating section main body 3 via a mounting plate 79. Further, the first pipe fixing member 76 includes a guide body 81 having a through hole 80 through which the connecting rod 73 passes.
1, a recess 83 that accommodates an O-ring 82 inside, and a cylindrical part 8 having a threaded part 84 on the outside.
5 and a tightening ring 86 screwed onto the threaded portion 84 of the cylindrical portion 85. This first pipe fixing member 76 is connected to the connecting rod 7.
3 is held in a fluid-tight manner so as to be slidable in the axial direction. Further, the second pipe fixing member 7
7 is composed of a pipe fixing part 90 having a pipe fixing hole 87 inside and an annular groove 89 for accommodating an O-ring 88 outside, and a fitting cylinder part 91 that fits into this pipe fixing part 90. . The fitting cylinder portion 91 of the second pipe fixing member 77 and the guide body 81 of the first pipe fixing member 76 are connected by a connecting pipe 92. Therefore, the connecting rod 73 is inserted into the connecting pipe 92 so as to be movable in the axial direction.
The distal end of an operating wire 93 that raises and lowers a treatment instrument guide (not shown) is connected to the distal end of the handle. The operating wire 93 is inserted into a guide pipe 94 fixed in the pipe fixing hole 87 of the second pipe fixing member 77, and the guide pipe 94 is installed inside the insertion portion 12.

Furthermore, a communication hole 95 is bored in the guide body 81 of the first pipe fixing member 76 in a direction perpendicular to the through hole 80 . One end of this communication hole 95 communicates with the guide pipe 94 via the through hole 80 and the connecting pipe 92, and one end of a cleaning tube 96 is connected to the other end. This cleaning tube 96 is led from one side of the operating section main body 3 to the back side thereof, and is connected to a cleaning and disinfecting inlet body 97 provided in a part of the casing 2. As shown in FIG. 12, this cleaning/disinfecting inlet body 97 is composed of a cap 99 inserted into a mounting hole 98 of the casing 2 and a tightening ring 100 screwed onto the cap 99. The inside of the guide pipe 94 can be cleaned and disinfected by inserting a syringe or the like containing cleaning water or disinfectant into the mouthpiece 99 and pumping it.

Next, the operation of the above embodiment will be explained.

First, in the bending operation mechanism 13, the first
When the sprocket 18 is rotated and the first chain 39 runs, the curved wire 42 on one passage 46 side in the width direction of the operation section main body 3 is pulled, and the curved wire 42 on the other passage 46 side is pushed. . Therefore, the curved portion is curved in the direction of the curved wire 42 being towed. When the curved wire 42 is further towed, the slope 57 of the collision member 56 provided on the connecting piece 55 connecting the base end of the curved wire 42 and the first chain 39 collides with the slope 63 of the stopper 62. Therefore, the curved wire 42 can no longer be towed. That is, the maximum bending angle of the curved portion is regulated by the stopper 62. Also, when the collision member 56 collides with the stopper 62, the screw 6
0 is pressed toward the second support portion 48 side. However, the end surface of the head 60b of this screw 60 contacts the side surface of the wall 58, and this contact prevents it from shifting in the axial direction together with the stopper 62, so that the maximum bending angle of the curved portion is There is no danger that the angle will be larger than the originally set angle.

In addition, as shown in FIGS. 2 and 3, when you put your finger on the treatment tool inductor operating lever 27 and rotate it counterclockwise, the rotating barrel 21 rotates in the same direction with the fixed barrel 20 as the axis. Rotate in the direction. Therefore, the second link 38 is retracted via the first link 30 fixed to the inner end of the rotating cylinder 21, and the operating wire coupling member 66 connected to the second link 38 is moved back. It is guided by the guide member 44 and retreats. Since the distal end of the operating wire coupling member 66 is connected to the operating wire 93 via the connecting rod 73, as the operating wire coupling member 66 moves backward, the operating wire 93 also retreats within the guide pipe 94, allowing treatment. A tool inductor (not shown) can be raised. Conversely, when the treatment instrument inductor operating lever 27 is rotated clockwise, the rotating barrel 21 is rotated in the same direction. Therefore, the second link 38 moves forward via the first link 30, and the operating wire coupling member 66 moves forward guided by the guide member 44. Therefore, the operating wire 93 can move forward within the guide pipe 94 and cause the treatment instrument guide to fall down. In this case, the first and second links 30 and 38 constituting the connecting member 29 are connected to the first and second chains 39 and 38 as the curved wire advancement and retreat means.
Since they intersect at the upper part of the wires 40, they do not interfere with each other, and the operating wire coupling member 66 can be smoothly advanced and retreated by utilizing the dead space between the coupling mechanisms 41, 41.

In addition, the operation wire coupling member 66 and the operation wire 9
3, insert the operating wire 93 into the guide pipe 94 built into the insertion section 12,
Its distal end slightly protrudes from the distal end of the guide pipe 94. Then, the end of the guide pipe 94 is inserted into the pipe fixing hole 87 of the second pipe fixing member 77 and fixed by soldering. Next, the tip of the connecting rod 73 is soldered and fixed to the end of the operating wire 93. On the other hand, a fitting tube 91 is fixed to one end of the connecting pipe 92 and a guide body 81 is fixed to the other end, and the connecting rod 73 is fitted from the distal end thereof. Then, this fitting cylinder part 91 is fitted to the pipe fixing part 90 via the O-ring 88, and the pipe fixing part 90 and the fitting cylinder part 91 are held liquid-tight. Next, the O-ring 82 is accommodated in the recess 83 of the guide body 81, and the tightening ring 86 is screwed onto the threaded portion 84 to hold the connecting rod 73 and the guide body 81 liquid-tight. In this state, the first pipe fixing member 7
6 to the partition wall member 43 via the mounting plate 78,
Further, the insertion hole 69 provided in the cylindrical portion 67 of the operation wire coupling member 66 is inserted into the distal end of the connection rod 73, and the two are connected and fixed by the tightening screw 74.

As explained above, the present invention provides a guide member between the curved wire advancing and retreating means provided in the operating section,
The operating wire connecting member of the treatment instrument guide is provided on this guide member so as to be movable back and forth, and the operating wire connecting member and the operating shaft are connected by a connecting member consisting of a link, and then the dead space can be used effectively. , the grip part in the operation part can be configured to be thin.
Therefore, operability can be improved, and the work of connecting the fluid transport tube in the operating section, the treatment instrument channel and the suction tube on the operating section side, the curved wire and the curved wire advancing/retracting means, and the stopper that defines the curve angle can be improved. This has the effect of not interfering with position adjustment work, etc., and facilitating assembly work.

[Brief explanation of drawings]

The drawings show one embodiment of the invention.
The figure is a partially cutaway side view of the operating section of the endoscope.
The figure is a vertical side view of the bending operation mechanism, FIG. 3 is a plan view showing the installed state of the treatment instrument guide control lever, and FIG.
The figure is a plan view of the first link, FIGS. 5 to 9 show the connecting mechanism, and FIG. 5 is a partially cutaway plan view.
Fig. 6 is a sectional view taken along the line of Fig. 5, Fig. 7 is a side view thereof, Fig. 8 is a sectional view taken along the line of Fig. 5, Fig. 9 is a side view thereof, and Fig. 10 is an operating wire. FIG. 11 is a perspective view of the coupling member, FIG. 11 is a longitudinal sectional side view showing a state in which the operating wires are coupled, and FIG. 12 is a sectional view of the cleaning and disinfecting inlet body. DESCRIPTION OF SYMBOLS 1... Operation part, 11a, 11b... Curved operation knob, 16... Inner cylinder (curved axis), 17... Outer cylinder (curved axis), 21... Rotating cylinder (operating axis), 29... Connection Member, 30...First link, 38...Second link, 39, 40...Chain (curved wire advance/retreat means), 44...Guide member, 66...Operation wire coupling member, 93...Operation wire .

Claims (1)

[Claims] 1. An operating section of an endoscope, at least a pair of curved wire advancing/retracting means provided on this operating section and movable back and forth in the axial direction of the endoscope by operation of a curved operating knob, and a curved wire advancing/retracting means provided between these curved wire advancing/retracting means. a guide member, an operating wire coupling member provided on the guide member so as to be movable back and forth and having one end connected to the operating wire of the treatment instrument guide; an operating shaft provided coaxially with the curved axis of the curved operating knob; An endoscope comprising: a link member that is connected to the operating shaft and whose other end is connected to the operating wire coupling member.