JPH0315432A - Curved operation device of endoscope - Google Patents

Abstract

PURPOSE:To miniaturize and operating part and improve operability by disposing a motor in such a manner that the central axis of the motor is nearly parallel to the central axis of the operating part. CONSTITUTION:On end of a shaft 26 is protruded to the opposite side of a main frame 14a through a hole 28 formed in a sub-frame 14b, and a driven side bevel gear 29 is formed on this protruded part. A driving side bevel gear 30 engaged with the driven side bevel gear 29 is provided on the output shaft 31a of a motor 31 fixed to surface opposite to the main frame 14a of the subframe 14b by means of a machine screw, and constituted in such a manner that a sprocket 17 is rotated through a plurality of gears by the motor 31. The motor 31 is constituted as a DC motor, and fixed in such a manner that its central axis is parallel to the shaft core of an operating part 7. Therefore, the necessity of protruding the portion opposite to the output shaft 31a of the motor 31 over a case 13 forming the operating part 7, or curving this part of the case 13 outward is avoided, by which the extension in diameter of the operating part 7 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Applications] The present invention relates to an endoscope bending operation device that can reduce the size of the operation section and improve operability.

[Prior Art and Problems to be Solved by the Invention] In recent years, the site to be observed within the body cavity is observed by inserting an elongated insertion part into the body cavity, and treatment tools are used as necessary. BACKGROUND OF THE INVENTION Endoscope devices that can perform therapeutic treatments or observe the inside of a lumen by inserting the insertion section into the lumen are widely used.

This endoscope device is provided with a curved section made of, for example, a plurality of mutually rotatable joint rings on the distal end side of the insertion section, and by curving the curved section, the distal end portion having a phantom lens is provided. 1F so that you can put finger meat on the observed part.
There are some that have been 4Ilied.

In an endoscope device having such a structure, both ends of a traction member such as an angle wire are fixed to the distal end or a node ring disposed closest to the distal end, and the traction member is The center 81S of the lever extends into the operating section and is wound around a drum disposed in the operating section.

By rotating this drum and pulling or relaxing the pulling member, the curved portion can be bent.

The drum is connected to an operating member such as an angle operating knob provided on the outside of the operating section, and when the drum is rotated via this operating member, the traction member is pulled or relaxed. In particular, the curved portion is curved.

However, according to this technology, the operator needs to hold the operating section with one hand and operate the operating section with the other hand, which makes the sleep operation cumbersome and also makes it difficult to operate while bending the device. It is difficult to operate other equipment or tools because your hands are occupied.

For example, West German Patent No. 2507'1.
6 6 March statement or Japanese Patent Application Laid-Open No. 1983-12261
Publication No. 9 discloses a technique in which a motor such as a servo motor is disposed in the operating section, and the motor and the drum are connected in series. With such a structure, it is possible to operate the motor with the fingers of the hand holding the operating part.
Compared to the above-mentioned manual type, it is much easier to operate.

However, according to these prior art techniques, the axial center of the drum is not arranged to be perpendicular to the axial center of the operating section because it is necessary to wind the drawstring member that has been installed inside the operating section. Since it is common that the drum is connected to the drum, the axial center of the motor connected to the drum is also arranged perpendicular to the axial center of the operating section. Part I: The tail of this motor tends to protrude from the outer wall of the operating section, which tends to make the operating section larger. The operability of the device may be hindered.

[Purpose of the Invention] The present invention has been made in view of these circumstances, and provides an endoscope in which it is possible to downsize the operation section (and further improve operability). The purpose of this invention is to provide a bending operation device.

[Means and effects for solving the problem] 8! According to the present invention! The mirror bending operation device is provided with an operation section I'J on the proximal end side of the insertion section having a curve 1111, a movable member disposed within this operation section, and the movable member bends the curved section. A motor that engages the traction member and drives the moving member is provided in the operating section, and the motor is arranged so that the central axis of the motor is substantially parallel to the central axis of the operating section. There is a movable member with a pulling part hoist held there by a motor disposed in parallel to the axis of the operating part, and the bending part is bent by a movable lever.

[Embodiments of the invention] Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 relate to the first embodiment of the present invention, FIG. 1 is a side view of the bending operating device, FIG. 2 is a plan view of the bending operating device, and FIG. 3 is an endoscope device. The overall view and the second and third figures are explanatory views of the operating state of the bending section.

First, the outline of the endoscope device will be explained with reference to Fig. 3.
In this figure, numeral 1 is an endoscope, 2 is a light source device,
In this light source device 2, a light source lamp 3 provided with a reversal plate 3a is disposed.

Further, the endoscope 1 has an insertion part 6 having a thin and flexible structure that can be inserted into a body cavity, etc., and a hand provided on the proximal end side of the insertion part 6. It has an operating part 7 formed in a relatively cylindrical shape that can be grasped by a child, etc., and a handle 8 extends from one side of the operating part 7. It is set up.

5 At the tip of this universal = 1-do 8, there is a connector attachment 1.
18a is provided, and the universal light source 8 is connected to the light source device Z? via this connector device 8a. It is configured so that it can be connected to 2. When this connector device @8a is connected to the light source device 2, the motor control unit 4 and video signal processing unit 5 disposed in the light source device 2 are connected to the endoscope 1 via the connector device 8a. At the same time, the illumination light input end 8b, which is connected to the connector device 8a, is opposite to the light source lamp 3, and the illumination light from the light source lamp 3 is connected to the connector device 8a. It is designed to be guided to the distal end side of the insertion section 6 via the universal cord 8.

A distal end portion 9 having a through-hole for illumination and a through-hole for observation is disposed on the distal side of the insertion section 6, and the illumination light is directed to the site to be observed such as inside the body cavity through the through-hole for illumination. It is designed to be misunderstood.

The image base of the observed part illuminated in this way is -1
The signal is transmitted to the video signal processing unit 5 in the light source unit 62 via the universal node 8, processed by the video signal processing unit 5, and output to the monitor 5a. The child who observed the video of the above-mentioned body part on the screen on July 5 was roaring with laughter.

Further, on the side closer to the operation part 7 than the tip part 9, a bending part 11 is provided which is composed of a plurality of joint rings, and the bending part 11 is configured of a plurality of joint rings, and the western part 11 can be operated to bend. The tip 9 can be directed toward the object 111 (position) by moving the object 111.

Of the number of nodes forming the curved portion 11, the node closest to the distal end 9 is fixed to the distal end 9, and the inside of this node 9 is arranged vertically and horizontally. , one end of each angle wire 12 is fixed (and the other end of these angle wires 12 is extended into the operating section 7 via the -12 insertion section 6).

As shown in FIG. 1, a case 13 constituting this operating section 7
The subframe 1/I is fixed in parallel to the main frame 14a with a predetermined gap 14c between the main frames 14a, which are set substantially parallel to the axis of the operating section 7.
A frame l) 11 consisting of b) is fixed.

The frame 14 is carved in the longitudinal direction of the operating section 7 and is symmetrically installed in pairs, and one frame 14 has a bending operating section 15 for vertically bending the bending section 11.
In addition, the other frame 14 (not shown) has a curved portion 1.
1 is provided with another bending operation section 15 for bending it left and right. Note that since these pair of bending operation parts 15 have the same structure, in this embodiment, the bending operation device 15 that bends vertically will be explained, and the explanation of the other bending operation device will be omitted.

A shaft 16 defined by a screw 16a is inserted between the main frame 14a and the main frame 14b, and is perpendicular to the axis of the operating section 7. Gap 1/l. A sprocket I-17, which is an example of a moving member, and a driven side gear 18 are rotatably fixed to the portion exposed at C. These sub [1//t1 to 17 and the driven side gear 18 are integrated into each other by press-fitting, for example.
A bushing 19 is wound around the cockpit 17. And when the endoscope 1 is operated, υBufreke 1 is located downward.
A plastic member 20 is interposed between the driven side gear 1718 and the driven side gear 1718 located on the side of the rib frame 14b. Care has been taken so that the sprocket 1-17 can rotate smoothly. As shown in FIG. 2, both ends of the bu-cone 19 are extended toward the insertion section, and the extended ends are connected to one end of the ampoule wire 2 via a link member 21. Fixed.

Therefore, when the gear 17 is rotated to the subblock 1 through the driven side gear 18, the angle wire 2 is pulled or relaxed through the chain 4-19, so that the curved shape is created as shown in FIG. The portion 11 is curved so that the tip portion 9 can be swung, for example, in the vertical direction. In addition, the angle wire 2, the chain 19 and the link part $J
2 1 is provided with a J:ri bow 9 member 22.

Both sides of the traction member 22 and the surface of the traction section 22 opposite to the main frame 14a are surrounded by a cover member 23 fixed to the main frame 22, and are surrounded by a cover member 23 fixed to the main frame 22. Another cover member 23a that surrounds the sprocket 17 in a semicircular shape is fixed on the side opposite to the insertion portion 6, and is disposed within the operating portion 7 when the traction member 22 moves. Care has been taken to prevent it from coming into contact with other parts. Further, a guide member 24 is provided at a portion where the sprocket 17 and the chain 19 are engaged or interlocked, so that the chain 19 can be smoothly separated from and separated from the sprocket 17.

On the other hand, a bearing box 25 is fixed to the main frame 14a closer to the insertion portion 6 than the subrocket 17, and to this bearing box 25, there is attached another shaft parallel to the shaft 16 that pivots the sprocket 17. A shaft 26 is rotatably provided via a bearing 26a.

10 A drive-side gear 27 is mounted via a gear 27a to a portion of this shaft 7-no 1-26 that is sandwiched by the chain 19 and extends toward the frame 14b. , the driving side gear 27 and the driven side gear 18 are engaged with each other. The diameter of this driving side gear 27 is set smaller than the diameter of the driven side gear 118, so that the rotation of the driving side gear 27 is reduced in speed and transmitted to the driven side gear 18. ing.

Further, one end of the shaft 26 is connected to the subframe 1/l.
．． The main frame 14 is connected to the main frame 14 through the hole 28 formed in the shape b.
It protrudes to the side opposite to a, and this protruding part forms a driven side umbrella south l'29.

The driving side bevel gear 30 meshing with the driven side bevel gear 29 is as follows:
A motor 3 is fixed to the surface of the subframe 14b opposite to the main frame 14a with screws (not shown).
The motor 31 is configured to rotate the subblock 17 via the plurality of gears described above. , '11 This motor 31 is configured as a DC motor, and is fixed so that its central axis is parallel to the axis of the operating section 7. Therefore, the case 13 where the output shaft 31a of the motor 31 and the part on the opposite side constitute the operation part 7.
．． ．． The need for protruding or sloping this part of the case 13 outward is avoided, and the
This prevents the operating portion 7 from increasing in diameter.

Incidentally, the operation button 32 for operating the motor 31 is arranged outside the operation section 7. That is, as shown in FIG. 3, for example, four buttons are provided on the base end side of the operation section 7, and each one is an upward curve button 32a and a downward curve button 32b.
, a rightward curved button 32C, and a leftward curved button 32d.

These operation buttons 32 are connected to the motor 31 and another motor (not shown) arranged in parallel to this motor 31 via a motor control unit 4 arranged in the light source device IT 2. Operate the operation button 32 according to the
4, the motor 31 can be driven via the motor control unit 4.

In addition, near the operation button 32 (air/water supply button 33,
Suction buttons 34 and the like are also provided so that these buttons can be operated without having to grasp the operating section 32 again.

Next, the operation of the embodiment based on the structure of the first series will be explained.

] When the universal door 8 is connected to the light source device 2 through the connector device 8a, the illumination light input end 8b of the connector device 8a is connected to the light source lamp 3 in the light source device 2. In addition, a motor control unit 4 and a video signal processing unit 5 are connected to the endoscope 1.

Next, when the insertion section 6 of the endoscope 1 is inserted into a body cavity and the light source device 2 is turned on, the illumination light generated by the light source lamp 3 and repelled by the repulsion plate 3a is It is guided into the endoscope 1 via the autopsy end 8b, and the area to be observed such as the inside of the body cavity {f7
Heterudou Zareru.

The video transmission of this observed part ifl is through the observation river throughhole '1
3 a video signal processing unit 5 incorporated into the endoscope 1;
Heto no J Zareru. And the bidet 1 signal processing unit 5
By processing the signal and outputting it to the seventh monitor 5a, it becomes possible to observe the image of the region to be observed through the screen of the second monitor 5a.

If the site to be observed is located laterally with respect to the axis of the insertion section 6, the distal end portion 9 can be directed toward the site by operating the operation button 32 and curving the 'C' curved portion 11. .

That is, when the back of the operation button 32, for example, the downward bending operation button 32b, is turned on, current is supplied to the motor 31 configured as a DC motor via the motor control unit 4 in the light source device 2, and this motor 31 The output shaft 31a starts rotating in a predetermined direction.

Then, the drive side bevel gear 30 rotates on this output shaft 31a, and this rotation is transmitted to the shaft 2 via the driven side bevel gear 29.
6, and the drive side gear 172 is transmitted to the shafts 1 to 26.
7 is rotated. Further, the driven side 1' Then, the chain 19 is moved in the axial direction of the insertion portion 7 by this subrocket 17.
Then, the angle wire 12, which is fixed to the chain 19 via the link part A21, is pulled or relaxed.

The end of the angle wire 12 opposite to the link member 21 (i.e., the end of the angle wire 12 is fixed to the joint located closest to the distal end 9 of the plurality of joint rings constituting the curved part 11. When each of the fixed parts is pulled or relaxed, the bending part 11 is bent downward, for example, according to the rotation angle of the spout 17, as shown in FIG. 4. As a result, the tip part 9 is directed toward the region to be observed, and this region to be observed can be observed on the monitor 58.

Then, when the tip 9 is directed toward the site to be observed,
When the operation of the downward inward curve button 32b is stopped, the motor 3
By stopping the operation of 15+h, the bending part 11 is stopped in the curved state.
It is i'i1 ability to continue observing the above-mentioned site to be observed.

Such an effect is the same when the bending section is bent in the left-right direction via a bending operation section (not shown).

On the other hand, when it becomes necessary to make the western part of the bay 11 straight, it can be easily made straight by operating the upward curving button 32a. The configuration is such that the position in the rotating direction can be detected, and when the position in the rotating direction of the subrocket 17 returns to its initial state, an indicator lamp disposed on the operating section 7 etc. lights up. , the above curvature is 11
It becomes possible to easily know the status of

In this embodiment, an example in which a DC motor is used as the motor 31 has been described, but the motor 31 need not be limited to a DC motor, and may be, for example, an AC motor, a pulse motor, or a standing wave type ultrasonic motor. Other types of motors are also acceptable.

16? In this embodiment ■, the pulling part 22 is the angle wire 1.
2. Although an example has been described in which the chain is configured as a composite body of chains 19 and one of the chains is engaged with the subrocket 17, which is an example of a moving member, the above-mentioned suspension member 22 and moving member are not limited to this structure. For example, it is also possible to configure the movable member as a drum, and to wrap a traction member made only of Wire 1712 around this drum. It is also possible to use a rack-shaped member, or to move this rack-shaped member by means of a feed screw disposed in the axial direction of the operating portion 7.

In this embodiment, since the portion of the traction member 22 disposed on the operating section 7 is covered by the cover member 22.22a, when the traction member 22 is moved, the operating section 7
There is no possibility of contact with other members disposed inside. In addition, since the guide member 24 is disposed at the part where the subrocket 17 and the chain 19 separate, the chain 1
9 sprockets 1 to 17 can be easily connected,
This has the effect that the bending operation of the curved portion 11 is smoother.

5 and 6 relate to a second embodiment of the present invention, in which FIG. 5 is a side view of the bending operation device, and FIG. 6 is a plan view of the bending operation device. Incidentally, the same parts and members having the same functions as those described in the first embodiment are given the same reference numerals, and the explanation thereof will be omitted.

In this embodiment, the bending operation device according to the present invention is
It is used in fiberscopes with
The motor 31 is disposed at a portion sandwiched between the chains 19.

That is, as shown in FIG. 5, an opening 36 is formed closer to the insertion portion 6 than the part of the main frame 14a where the sprocket 17 is disposed, and a part of the motor 31 is inserted into this opening 36. The part is inserted and fixed. The motor 31 is configured as a geared motor having a gear head 31b at its head, and can rotate the output @31a with increased torque.

)) As shown in Figure 6, this 7-ku 31 il'l rod E)
[11B] The diameter of the sub [J-kett 17, 111] and the r. lj#l. A predetermined gap is formed between both sides of the motor 30 and the traction member 22 such as the chain 19.
Even if the motor 2 is moved, it will not come into contact with the motor 30.

In addition, the above main knob frame 14a etc. 4 knob frame 1
4. A bearing box 25 is fixed to each of the bearing boxes 25 and 26, and the Nos. 1 and 26 are movably provided in the bearing box 25 via bearings 25a. A driven-side umbrella pulley 29 is fixedly provided, for example, by press-fitting, at a substantially central portion disposed within the gap 14C of the shaft 26, and the output of the driven-side umbrella pulley 29 is controlled by the output of the motor 31. Drive side bevel gear 30 provided on shaft 31a
It is meshed with.

The driven side bevel gear 29 of the shaft 26 and the subframe 1
4b, a drive side gear 27 is fixed by a gear 27a, etc., and a brass section made of engineered plastic material {A20 is interposed so that the drive-side gear 27 rotates smoothly.

Further, the drive side gear 27 is engaged with a driven side gear 18 which is rotatably disposed in the gap 14c, and the sprocket 1 with the gear 19 engaged with the driven side gear ψ18.
7 is press-fitted into 61Y.

With this configuration, when the output shaft 31a is rotated via the gear head 30b of the motor 30, this rotation is transmitted to the sprocket 1 via the drive side gear 27, driven side gear 18, etc.
It will be transmitted to 7. Then, as the subrocket 17 is rotated, the pulling member 22 is pulled or relaxed, and the curved portion 11 is curved di+.

In this embodiment, the motor 31 is connected to the main frame 14a and the subframe 1=1. bGap between 1/I. C
Not only is the motor 31 disposed in the main frame 14a, but also a part of the motor 31 is formed in the main frame 14a! ζ Listen 1] Part 32
Since there are 1111 people in 0.6, it is possible to reduce the diameter of the operating section 7.

Furthermore, since the motor 31 is set as a gear/sword motor, it is possible to set the output to a large value even if the voltage supplied to the motor 31 is low. Miniaturization 1 Rudoga Shun Noichi C
At the same time, it is possible to further reduce the size of the operating section 7.

FIG. 7 is a side view of a bending operation section according to a third embodiment of the present invention.

In this embodiment, the driven side gear integrated with the sprocket 17 is configured as a crown gear 18, while
A motor 31 configured as a geared motor is fixed to the surface of the main frame 14a on the subframe side 14b side, and a pinion 30 that meshes with the crown gear 18 is, for example, press-fitted onto the output j-shaft 31a of the motor 31. It is established by

When the output shaft 31a of the motor 31 rotates, the pinion gear 30 of the output shaft 31a rotates the crown gear 18, and the sprocket 17, which is rested on the crown gear 18, is rotated. In particular, the traction portion 22 is pulled and relaxed, and the curved portion 11 is curved.

If the structure is as in this embodiment, it is convenient to omit the driven side bevel gear, the drive side gear, etc., and the structure can be simplified accordingly, and the operation section 7 It is possible to further reduce the diameter and weight.

The means for driving the sprocket 17 by the motor 30 includes a pinion 30 and a crown gear 1 as in this embodiment.
Not only can it be configured with 8, but it can also be configured as a friction cow.

FIG. 8 is a side view of a bending operation device according to a fourth embodiment of the present invention.

In this embodiment, a sprocket 17 and a driven side gear 18 temporarily rested on the sprocket 17 are arranged on the insertion section 6 side of the operating section 7, and a driving side gear 27 and a driven side gear 18, which are pivotally fixed to a shaft 26, are disposed on the insertion section 6 side of the operation section 7. The driven side bevel gear 30 and the like are arranged on the side opposite to the entry portion 6 of the middle 22 of the subblocks 1 to 17. Also, the above C? 7
A frontage part 6 is formed in the matchmaker part 6 of 1 to 26 and the main frame 14a on the opposite side 4, and a part of the motor 31 configured as a card motor is inserted into this opening 36 and fixed. There is.

According to such a configuration, the distance between both ends of the chain 19 wound around the subrocket 17 (distance 111t shown as "b" in FIG. 6) can be made small regardless of the diameter of the motor 31. Therefore, the diameter of the spout 1 cut 17 can be made smaller, and the operation part 7 can be made smaller accordingly.
It becomes possible to reduce the diameter.

[Effects of the Invention] As explained above, according to the endoscope bending operation device of the present invention, the motor that drives the movable member is disposed approximately parallel to the axis of the operation section. A vertically elongated motor can be used, and the operating section can be made smaller in diameter, and operability can be improved by reducing the diameter of the operating section.

[Brief explanation of the drawing]

1 to 4 relate to the first embodiment of the present invention, and FIG. 1 shows the bending operation S! ! A side view of i@, Fig. 2 is a plan view of the bending operation device, Fig. 3 is an overall view of the endoscope casing, Fig. 4 is an explanatory diagram of the operating state of the bending part, and Figs. 5 and 6 are 5 is a side view of the bending operation device according to the second embodiment of the present invention, FIG. 6 is a plan view of the bending operation device 'It, and FIG. 7 is a bending operation device according to the third embodiment of the present invention. FIG. 8 is a side view of a bending operation device according to a fourth embodiment of the present invention. 7...Operation section 9...Insertion section 11...Bending section 17...Moving section shrine 22...Traction section system 31...Motor 23 2/I Procedure Neho official document (voluntary)

Claims (1)

[Claims] An operating section is provided on the proximal end side of the insertion section having a curved section, a movable member is disposed within the operating section, and a traction member that curves the curved section is engaged with the moving member. Also, in the bending operation device for an endoscope, in which a motor for driving a moving member is provided in the operating section, the motor is arranged so that the central axis of the motor is substantially parallel to the central axis of the operating section. A bending operation device for an endoscope.