JPH02257925A - Curved operation device for endoscope - Google Patents

Abstract

PURPOSE:To set a large degree of curve at a curved portion, prevent the diameter of an operating section from increasing and obtain secure curved operation by disposing a moving member on one side of the operating section, connecting an angle wire with the moving member, and disposing a guide member having a hole for passing and turning back the angle wire. CONSTITUTION:A connector device 4a is connected to a connector receptacle 6a of a camera control device 6, and a connector 7a is connected to a connector receptacle 8a of a light source device 8 to transmit illumination light in the direction of fore-end 11. Inserting an insertion section 3, the fore-end 11 is brought near to a portion to be observed. When a finger piece 25 is slid toward the fore-end 11, a rod member 24 is slid, a link member 31 is moved, and a fixed portion of an angle wire 21 is moved in the direction opposite to a movable member 26 and tensioned. The portion of the angle wire 21 located from the point where a link member 31 is secured to the fore-end 11 is relaxed, a curved portion 10 is bent downward for example according to the sliding distance of the movable member 26, and the fore-end 11 is directed toward a portion to be observed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an endoscope bending operation device that is capable of obtaining reliable bending operations.

[Prior art and problems to be solved by the invention] In recent years, the inside of a body cavity can be observed by inserting an elongated insertion section into the body cavity, and if necessary, processing using a processing tool can be performed. Alternatively, endoscope devices capable of inserting the insertion portion into a lumen and observing the inside of the lumen are widely used.

For example, a curved portion consisting of a plurality of joint rings that can rotate with respect to each other is provided on the distal end side of the insertion section, and both ends of the angle wire are fixed to the joint rings arranged on the distal end side. There is. The central part of this angle wire is extended into the operating section provided on the proximal end side of the insertion section, and this extended section is wrapped around a boob rotatably disposed within the operating section. ing. Then, the bow is rotated via an operating member such as a handle or a knob to pull or relax the angle wire, thereby bending the curved portion,
The distal end portion fixed to the distal end side of the curved portion is directed toward the site to be observed.

In such a configuration, the tension m of the angle wire must be increased when it is necessary to curve the curved portion to a large extent or when the curved portion is formed long. However, the operating member is generally operated with a finger such as a thumb of the hand holding the operating portion, and it is difficult to increase the rotation angle.

To deal with this, it may be possible to increase the rotation angle of the pulley by regripping and rotating the operating member many times, but the bending operation is complicated and it is not possible to obtain a predetermined bending angle. This not only increases the burden on the operator, but also increases the burden on the patient, especially in the case of a medical endoscope device.

On the other hand, it is conceivable to increase the diameter of the pulley and obtain a large tension (6) with a small number of turns, but if the diameter of the pulley is increased, the operation section will also become larger, making it difficult to grip. Or, for example, air supply.

Operability may deteriorate as it may interfere with other operations such as water supply.

Therefore, prior to the patent application in Japanese Patent Application No. 63-264942, the present applicant provided a movable member in the operating section that was movable approximately parallel to the axis of the operating section, and connected the movable member and the angle wire. We have applied for a technique in which the bending section can be operated to bend by engaging the distal end side of the pulley via an engagement member and moving the movable member.

However, if the angle wire is moved toward the pulley via the movable member using such a technique, there is a possibility that the angle wire stretched between the engagement portion and the pulley may become loose. When the movable member is moved toward the bobbin in this state, the loosened part of the angle wire is also moved toward the pulley, and the curvature of the angle wire becomes larger than the curvature forming the outer periphery of the pulley, causing the angle wire to move toward the pulley. There is a possibility that the wrapping state between the pulley and the pulley will be released, making it impossible to perform the bending operation.

To deal with this, for example, as disclosed in Japanese Utility Model Publication No. 60-24321, a part of the angle wire may be fixed to the pulley to prevent the angle wire and the pulley from being unwound. Conceivable.

However, with this configuration, the movable distance of the angle wire is limited to a half circle of the boe from the part where the pulley and the angle wire are separated to the part where the pulley and the angle wire on the opposite side are separated. Therefore, it becomes difficult to set a large amount of movement of the angle wire, that is, the curvature (2) of the curved portion. It is conceivable to increase the amount of movement of the angle wire by forming the pulley with a large diameter, but if the diameter of the pulley is increased, the diameter of the operating section must also be increased.

[Object of the Invention] The present invention has been made in view of these circumstances, and it is possible to set a large curved portion in the curved portion, and
It is an object of the present invention to provide a bending operation device for an endoscope that prevents the diameter of the operation section from increasing and allows for more reliable bending operation.

[Means and effects for solving the problem] The operating device for a curved section according to the present invention has a device on one side of an operating section provided on the proximal end side of an insertion section having a curved section, which is substantially parallel to the axis of the operating section. A movable member is provided that is movable, and one side of an angle wire for curving the bending portion is extended into the operating portion to connect the angle wire and the movable member;
A guide member is provided with a hole through which the angle wire is inserted and folded back.

With this configuration, when the movable member is moved approximately parallel to the axis of the operating section, the angle wire connected to the movable member is guided by the guide member and pulled or relaxed, thereby bending the curved portion. Ru.

[Embodiments of the invention] Hereinafter, the present invention will be described in detail with reference to the drawings.

1 to 5 relate to the first embodiment of the present invention, in which FIG. 1 is a cross-sectional side view of the operating section, FIG. 2 is a side view of section A in FIG.
3 is a diagram indicated by the ■ arrow in FIG. 2, FIG. 4 is a schematic configuration diagram of the endoscope system, and FIG. 5 is an explanatory diagram of the camera 111 control unit and the light source device.

First, an overview of the system will be explained with reference to FIGS. 4 and 5. The endoscope device 1 has a body cavity located on the distal end side of an operating section 2 that is formed into a substantially cylindrical shape and can be grasped with a hand or the like. It is configured to have an elongated insertion portion 3 that can be inserted into the inside of the tube or into a lumen.

A universal cord 4 extends from the rear end side of the operating section 2 . A connector device 4a is provided at the tip end of the universal cord 4, and the universal cord 4 is connected to a camera control device 6 to which a monitor 5 is connected via the connector device 4a. . Further, another universal cord 7 is branched from the connector assembly 274a. This universal code 7
Another connector device "Ml 7 a" is provided at the tip of the universal cord 7.
It is connected to the light source device rIi8 via a.

On the other hand, the insertion section 3 includes a flexible tube 9 connected to the distal end side of the operating section 2, and a curved section 1 provided at the distal end side of the flexible tube 9.
0, and a distal end portion 11 fixed to the distal end of the curved portion 10.

The distal end portion 11 is provided with an observation hole, an illumination hole, etc. (not shown), and image guide fibers 13. One end of the light guide fiber 14 is opposed to each other.

These imaged fibers 13 and light guide fibers 14 are guided into the universal cord 4 via the bending tube 9 and the operating section 2.

The other end of the image guide fiber 13 is connected to the connector device 4a of this universal cord 4, while the light guide fiber 14 is branched to another universal cord 7 via this connector device ri14a. 7a.

As shown in FIG. 5, the camera control device 6 is provided with a connector receiver 6a to which the connector assembly 2-4a is connected. Further, within this camera system U device 6, an imaging lens 1 is provided so as to face the output end surface of the image guide fiber 13 of the connector device 4a when the connector device 4a is connected.
5 is disposed, and a solid-state image conveying element 16 such as a COD as an example of an image conveying means is disposed at the image forming position of the image forming lens 15. Further, a signal processing circuit 17 is connected to this solid-state 1'l image element 16, and the observation image formed by the imaging lens 15 is subjected to signal processing in this signal processing circuit 17, and the above-mentioned It is now output to monitor 5.

Further, the light source device 8 is also provided with a connector receiver 8a to which the connector device 7a is connected, and a lamp 18 and a condensing lens 19 are provided in the light source device 8. The illumination light is collected by condensing lens 1.
9, the light is focused at the light i of the connector device fiR7a.
- 14 guide fibers are introduced into rjJtIa. The illumination light is transmitted to the tip 11 by the light guide fiber 14.

On the other hand, the curved portion 10 adjacent to the tip portion 11 is composed of, for example, a plurality of joint rings that are rotatable with respect to each other. Among these plurality of nodal rings, the one closest to the tip 11 is the tip i! 1ls11, and both ends of - angle wires 21 are fixed inside thereof, for example, above and below.

As shown in FIG. 1, the central part of the angle wire 21 is extended into the operating section 2 via the flexible member 'fJ9, and this extended portion is a guide member fixed within the operating section 2. 2
It is folded back and stretched at 2.

The guide member 22 is formed into a U-shape and is made of a material such as resin, which has low friction with the angle wire 21. Further, a hole 22a is formed along the bent axis of this guide portion 4422, and the angle wire 21 is folded back by being slidably inserted into this hole 22a. And this Angle Lie A722
can be moved to the distal end 11 side or the opposite side via this guide member 22, and along with this movement, the curved section 10 is curved, so that the distal end 11 can be moved toward the area to be observed, etc. It is becoming more oriented towards.

As shown in FIGS. 2 and 3, the U-shaped parallel portion of the guide member 22 is fixed to the member 20 via the fixing member 20a, and the member 20 is attached to the member 20 via the fixing member 20a. This guide portion 4422 is fixed by being fixed to the inner circumferential wall of the operating portion 2.

Incidentally, on one side of the operating section 2, there is provided a relatively long four section 23 parallel to the stretched angle wire 21.

A rod-shaped member 24 formed in a straight line is housed in the recess 23 in parallel with the recess 23, and both ends of the rod member 24 are inserted into the operating section 2 through holes 23b formed in the side wall 23a of the recess 23. has been inserted into.

Further, in the central part of the rod-shaped member 24 disposed in the recess 23, a finger rest slightly protruding from the outer surface of the operation part 2 is fixed with a member 25 using adhesive, solder, screws, etc. Fixed. This finger hook allows the rod-shaped member 24 to be slid in the longitudinal direction of the rod-shaped member 24 by operating the member 25 with a finger or the like. Note that these rod-shaped members 24 and finger rests are part of the member 2.
5 constitutes a movable member 26.

A large diameter M23c is formed inside the hole 23b, and an O-ring 27 is fitted into the large-diameter portion 23c, and the O-ring 27 establishes a watertight state between the hole 23b and the rod-shaped member 24. It is protected. Therefore, even when cleaning or disinfecting the endoscope device 1, cleaning liquid, disinfectant liquid, etc.
It is prevented from penetrating into the operating section 2 through 3b.

Further, stopper members 28 are fixed to both sides of the rod-shaped member 24 inserted into the operating portion 2 by, for example, solder, screws, adhesive, etc. so that the position can be adjusted.

This stopper member 28 allows the finger to rest when the rod-like member 24 is moved via the member 25. !
Before coming into contact with the side wall 23a of the first portion 23, the rod-like member 24 is fixed at a position where it can come into contact with the inside of the side wall 23a, which is set as a stop member 30, and stop the movement of the rod-shaped member 24.

Further, a link member 31 is provided at a portion of one end of the rod-shaped member 24 outside the portion to which the stopper member 28 is fixed.
is fixed, for example, with adhesive, solder, screws, etc., and the link member 31 is fixed closer to the tip end 11 than the guide member 22 of the angle wire 21, so that the movable member 26 and the angle wire 21 are connected to each other. is fixed.

Therefore, when the finger hook slides the rod-shaped member 24 through the member 25 within the range allowed by the stopper member 28,
Along with this sliding, the angle wire 21 is moved and the curved portion 10 is curved. The finger rest has the movable member 26 and the angle wire 21 fixed so that the curved part 10 is in a straight line when the member 25 is located at the center of the four parts 23, and the stopper member 28 is fixed. , the bending portion 10 is fixed at a position where it can come into contact with the stop member 30 and stop the movement of the rod-shaped member 24 before the bending portion 10 reaches a set allowable bending distance.

When performing observation with the endoscope device 1 having such a configuration, the connector device 4a is connected to the connector receiver 6a of the camera control device 6, and the other connector 7a is connected to the light source device 8.
The light source device 8 transmits illumination light from the light source device 8 toward the distal end portion 11 via the light guide fiber 14. In addition, inserting the insertion part 3 into a body cavity or a lumen,
The distal end portion 11 is positioned near the site to be observed.

In this state, the finger hook disposed in the recess 23 of the operating section 2 allows the member 25 to be slid, for example, in the direction of the distal end 11 with a finger or the like. Then 1. The rod-like members 24 of the movable member 26 are slid together, and the link member 31 inserted into the operating portion 2 of the rod-like member 24 is moved in the same direction. A portion of the angle wire 21 is fixed to the link member 31, and the fixed portion of the angle wire 21 is moved toward the tip portion 11 together with the rod-shaped member 24.

As a result, the angle wire 21 at the folded portion is moved in the direction opposite to the direction of movement of the movable member 26 via the guide member 22, so that the angle wire 172
1 is pulled, while the angle wire 21 on the side closer to the tip 11 than the link member 31 to which the link member 31 is fixed is relaxed. Since both ends of the angle wire 21 are fixed to the node closest to the tip 11 of the plurality of nodes constituting the curved portion 10, when each of the fixed portions is relaxed or stretched, the As shown by the broken line in FIG.
Directed to the detection area.

Further, when it is necessary to curve the bending portion 10 to the opposite side, the finger hook of the movable member 26 causes the member 25 to slide in the opposite direction.

Then, the side of the angle wire 21 to which the link member 31 is fixed is pulled closer to the tip 11 than the link member 31, and the curved portion 101fi is bent in the opposite direction, while the link of the angle wire 21 Member 31
At the same time, the distance between the angle wire 21 and the guide member 22 is relaxed, and the portion of the angle wire 21 that is folded back by the guide member 22 is pulled by the node ring on the distal end portion 11 side.

In this case, even if the angle wire 21 between the link member 31 and the guide member 22 is loosened, this angle wire 21
Since the angle wire 21 is inserted into the hole 22a of the guide member 22, the engagement between the angle wire 21 and the hole 22a of the guide member 22 will not be released, and bending will not become difficult.

The stopper member 28 comes into contact with the stopper member 30 before the bending portion 10 is bent beyond the allowable amount, thereby preventing excessive stress from being placed on the angle wire 21 and the like.

When the bending portion 10 is bent in this manner, the illumination light from the light source device 8 is emitted through the illumination through hole formed in the tip portion 11, and the An image of the region to be observed is transmitted to the camera control device 6 via the image guide fiber 13 facing the observation hole. The observation image transmitted to the camera control device 6 is processed by the solid-state image sensor 16 and the signal processing circuit 17, and output to the monitor 5, so that observation can be performed on the monitor 5.

In this embodiment, the hole 22a is formed in a U-shape by forming the hole 22a along the axis of the U-shaped guide member 22, but the shape of the hole 22a is different from that in this example. The shape is not limited to this, and other shapes such as a W-shape or an α-shape are also possible.

In addition, in this embodiment, the present invention is applied to the image guide fiber 1.
Although the present invention is not limited to this embodiment, the solid-state image pickup device 16 such as a COD as an example of an image carrying means is used at the tip end. It is also possible to use it for a so-called electronic scope provided in 11.

Furthermore, in this embodiment, an example has been described in which the camera control device 6 is connected to the endoscope device 1, and the part to be observed is observed using the monitor 5. However, the endoscope device Pf1 has a steel It is also possible to configure it so that a camera can be connected.

Furthermore, when the link member 31 is configured to be able to swing in a predetermined R relative to the rod-shaped portion 'jjA24, the concave portion 23 formed on one side of the operating section 2 allows the four portions 23 to move in the tensioning direction of the angle wire 21 and the operating section. Even if the ax is not formed completely parallel to the axis of the ax and there is a misalignment within a certain range, the above-described effect can still be achieved.

Further, in this embodiment, an example has been described in which the bending portion 10 is bent only in the up and down directions by operating the movable member 26, but the direction of the bending is not limited to up and down. Of course, it is also possible to configure it so that the bending operation can be performed in four directions including left and right.

6 and 7 relate to a second embodiment of the present invention, FIG. 6 is a side view of the guide member, and FIG. 7 is a perspective view of the guide member. It should be noted that the same members and members having the same functions as those of the first embodiment described above are given the same reference numerals and their explanations will be omitted.

In this embodiment, the guide member 22 is formed of a steel pipe or the like, and the curved portion of the guide member 22 is connected to a single fixing member 2.
The attachment is fixed to the member 20 via 0a, which has the same effect as the first embodiment and has the advantage of being easy to form.

FIG. 8 is a side view of a guide member according to a third embodiment of the present invention.

In this embodiment, the guide member 22 is formed of a tightly wound coil, and has the same effect as the above-mentioned first and second embodiments.

9 and 10 relate to the fourth embodiment of the present invention, and FIG.
The figure is a sectional view of the guide member, and FIG. 10 is a perspective view of the guide member.

In this embodiment, the diameter of the hole 22a at both ends of the guide member 22 formed in a pipe shape is expanded in a tapered manner, and the angle wire 2
1 is moved into the hole 2Oa, the angle wire 21
The effect is that the movement is smooth.

FIG. 11 is a side view of a guide member according to a fifth embodiment of the present invention.

In this embodiment, the guide member 22 is made of resin or the like, and the diameter of both ends of the guide member 22 remains unchanged, and only both ends of the hole 22a formed in the guide member 22 are tapered. This embodiment has the same functions and effects as the fourth embodiment described above.

12 to 14 relate to the sixth embodiment of the present invention, in which FIG. 12 is a side view of the guide member, FIG. 13 is a sectional view of the guide member, and the fourteenth factor is indicated by the arrow X IV in FIG. 12. It is an illustration.

In this embodiment, the guide member 22 is formed into a substantially rectangular shape, a 0-shaped groove is formed in the guide member 22, and a fixing member 20a having substantially the same size as the guide member 22 is attached to the groove. The opening of v! By plugging this groove into hole 22
a, and is fixed to the guide member 20.

In such a configuration, the rigidity of the hole 22a is increased, so that when the angle wire 21 is moved, the hole 22a
2a is prevented from deforming, and the movement of the curved portion 10 can accurately follow the movement of the movable member 26.

15 to 17 relate to the seventh embodiment of the present invention, FIG. 15 is a cross-sectional side view of the operating section, and FIG. 16 is B of FIG. 15.
FIG. 17 is a schematic configuration diagram of the endoscope system.

In this embodiment, the bending operation device according to the present invention is applied to the eyepiece section 3.
2 is used in the endoscope device 1 provided at the rear end of the operating section 2, and as shown in FIG. 15, the angle wire 21
A stopper member 21a having a diameter larger than the hole 22a of the guide member 22 is fixed to the cut part on the opposite side to the side to which the link member 31 is fixed.

Further, the finger hook member 25 of the movable member is the guide member 22.
It is fixed to the rod-shaped member 24 in a state where it is deviated toward the side farther apart, that is, the tip end 11 side.

According to such a configuration, the finger hook guides the member 25 to the guide member 2.
By moving the angle wire 21 to the second side, the angle wire 21 is moved within the range set by the stopper member 28, and the curved portion 10
is curved at a predetermined angle only in one direction, for example, the upward direction.

When the force for moving the member 25 is released, the finger hook uses its own elastic force to move the member 25.
0 returns to the 0 line, and the above possible a 'err material 2
5 is also returned to its original position.

In addition, in order to ensure the return, the above curvature i
A return spring may be provided at io, etc. In addition, in order to maintain the curved part in a curved state,
For example, a stop device may be attached to the movable member 26,
It is also possible to eliminate the stopper member 28 of the rod-shaped member 24 and provide only the angle wire 21 with a plurality of stopper members 21a.

The configuration of this embodiment has the effect that it is highly convenient to inspect the inside of a tube hole, etc., whose curvature is predetermined.

[Effect of the invention J As explained above, in the bending operation device for the inner 81 mirror according to the present invention, it is possible to set a large curvature li1 in the curved part, and it is possible to prevent the diameter of the operating part from increasing. In addition, it is possible to perform a reliable bending operation, and it is possible to prevent an increase in the burden on the operator and the patient.

[Brief explanation of drawings]

1 to 5 relate to the first embodiment of the present invention, in which FIG. 1 is a cross-sectional side view of the operating section, FIG. 2 is a side view of section A in FIG.
Fig. 3 is a diagram indicated by the ■ arrow in Fig. 2, Fig. 4 is a schematic configuration diagram of the endoscope system, Fig. 5 is an explanatory diagram of the camera control unit and light source device, and Figs. 6 and 7 are the invention of the present invention. Regarding the second embodiment, FIG. 6 is a side view of the guide member, FIG. 7 is a perspective view of the guide member,
FIG. 8 is a side view of a guide member according to a third embodiment of the present invention;
9 and 10 relate to the fourth embodiment of the present invention, and FIG.
The figure is a sectional view of the guide member, FIG. 10 is a perspective view of the guide member,
FIG. 11 is a side view of a guide member according to a fifth embodiment of the present invention, and FIGS. 12 to 14 are a side view of a guide member according to a sixth embodiment of the present invention.
FIG. 12 is a side view of the guide member, FIG. 13 is a sectional view of the guide member, FIG. 14 is a view taken along the line XIV in FIG. 12, and FIGS. 15 to 17 show a seventh embodiment of the present invention. 15 is a cross-sectional side view of the operating section, FIG. 16 is a side view of section B in FIG. 15, and FIG. 17 is a schematic configuration diagram of the endoscope system. 2... Operating section 9... Insertion section 10... Curved section 21... Angle wire 22... Guide member 22a... Hole 26... Movable member Fig. 2 Fig. 1 Lagoon 3 Figure 8 Figure 10 Figure 9 Cause Figure 12 g13

Claims (1)

[Claims] A movable member movable approximately parallel to the axis of the operating section is provided on one side of an operating section provided on the proximal end side of the insertion section having a curved section, and one side of an angle wire for bending the curved section is provided. An endoscope characterized in that a guide member is provided in the operating section, the guide member extending into the operating section to connect the angle wire and the movable member, and having a hole through which the angle wire is inserted and folded back. bending operation device.