JPH0595896A - Endoscope - Google Patents

Abstract

PURPOSE:To provide an endoscope, which can generate a certainly locked state and free state using a small, light, and simple structure and which can make sure curving operation even though an external load is applied at the time of curving operation. CONSTITUTION:A slidable motor frame 37 is fitted on the oversurface with motor for curving 38, 39 equipped with a driving gear and is provided with a can groove 50 for sliding motions, and a cam plate 51 is furnished which can work with this cam groove 50, and a locking shaft 58 and a hook 57 for suppressing sliding motions of the motor frame 37 are furnished in order to make holding so that the meshing of the driving gear with a driven gear is not disengaged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope in which a bending portion of a distal end of an insertion portion of an endoscope is bent by a driving device such as a motor.

[0002]

2. Description of the Related Art Recently, an electric motor is incorporated in an endoscope operating section, and the power of the electric motor is used to pull a bending member for bending operation to remotely bend the bending section in the insertion section. Such an endoscope is used.

As an electric endoscope equipped with such a drive device, for example, in Japanese Patent Laid-Open No. 53-39685, a power transmission mechanism composed of gears for transmitting power from a motor is used as a clutch mechanism. This clutch mechanism realizes a free state in which the curved portion can be freely bent by an external force, in contrast to a locked state in which gears are meshed to bend the curved portion by this clutch mechanism. ..

That is, one of the two gears connected in the transmission gear train constituting the power transmission mechanism in the axial direction is mechanically moved in the axial direction to release the connection, and the curved portion of the endoscope is bent. It is a free state.

However, since the gears constituting the transmission gear train are axially moved and meshed and separated from each other, the teeth of the gears cannot be smoothly meshed when the gears are actually separated and then meshed again. Occurs, which causes a problem that the locked state in which the power from the motor is transmitted cannot be reliably realized.

Further, even when the gears that are meshed with each other are separated from each other, particularly when a large load is applied to the teeth of the gears, the tooth surface of the gears that are meshed with each other has a large friction and a large amount of separation is required. There is a problem that it requires power and the operability deteriorates.

In order to solve these problems, therefore, one of the meshing gears of the transmission gear train constituting the power transmission mechanism is meshed with the meshing point in the direction substantially normal to the pitch circle and is made separable. An endoscope equipped with a clutch mechanism can be considered.

[0008]

However, in the endoscope provided with the clutch mechanism that meshes in the normal line direction and can be separated from each other, when a load is applied from the outside when the bending portion of the endoscope is bent, the transmission gear train is used. Since a force acts in the direction in which the gears are separated, the movable gears in the transmission gear train are separated, which may lead to a state in which the bending operation cannot be performed.

The present invention has been made in view of the above circumstances, and realizes a reliable locked state and a free state in an endoscope having a motor or the like as a drive source for bending operation, with a small size, a light weight, and a simple structure. At the same time, it is an object of the present invention to provide an endoscope capable of performing a reliable bending operation even when a load is applied from the outside during bending.

[0010]

In order to achieve the above object, an endoscope according to the present invention is provided with a pulling operation means for bending a bending portion provided in an insertion portion, and power from the bending operation driving means for the pulling operation. And a clutch means for connecting and disconnecting the power transmission of the power transmission means, and a locking means for keeping the connection state of the clutch means.

[0011]

[Operation] In the above configuration, first, when the insertion portion of the endoscope is inserted into the body cavity or the like to perform the bending operation, the power transmission means is brought into the connected state by the clutch means. Simultaneously with the connecting operation of the clutch means, the lock means also operates so as to maintain the connected state of the clutch means.

Then, the curving operation driving means is driven, and the power from the curving operation driving means is transmitted to the pulling operation means via the power transmission means.

Then, the bending portion provided in the endoscope insertion portion bends in accordance with the power from the bending operation driving means.

Since the power transmission means is kept connected by the locking means, the power transmission means will not be disconnected even if an external load is applied to the curved portion.

Next, in the case where the endoscope insertion portion is removed from the body cavity or the like, in order to bring the curved portion into a free state in which it can be freely bent by an external force, the power transmission means is operated by the clutch means. In the cut state, the transmission of power from the bending operation drive means is released. Simultaneously with the disconnection operation of the clutch means, the lock means is released.

[0016]

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

First Embodiment FIGS. 1 to 5 show a first embodiment of the present invention, FIG. 1 is a schematic plan view showing the position of a driving device in the bending operation portion in a locked state, and FIG. 2 is an endoscope. 1 is a schematic view of the entire configuration of the device, FIG. 3 is a sectional view taken along line III-III of FIG.
FIG. 4 is a schematic plan view showing the position of the driving device in the bending operation section in the free state, and FIG. 5 is a VV sectional view of FIG.

In FIG. 2, reference numeral 1 indicates an electronic endoscope apparatus, which includes an electronic endoscope 2 and a light source apparatus 3 for supplying illumination light to the electronic endoscope 2. A video processor 4 for performing signal processing for the electronic endoscope 2, a monitor 5 for displaying a subject image by inputting a video signal output from the video processor 4, and an insertion portion 7 of the electronic endoscope 2. The bending motor control device 6 for controlling the bending of the bending portion 16 provided in the.

The electronic endoscope 2 has an insertion portion 7 formed in a slender shape so that it can be inserted into a subject, a large-diameter operation portion 8 connected to a rear end of the insertion portion 7, and an operation portion 8 having a large diameter. A universal cord 9 extending from a side portion of the operation portion 8 and a connector 10 provided at an end portion of the universal cord 9 and detachably connected to the light source device 3 are provided. From the side of this connector 10, the cord 11 for the video processor
And the motor control device cord 13 are extended.
A connector 12 is detachably connected to the video processor 4 at an end of the video processor cord 11.
Is provided, and a connector 14 detachably connected to the motor control device 6 is provided at an end of the motor control device cord 13.

Further, the insertion portion 7 of the electronic endoscope 2 is
A rigid tip forming portion 15, a bending portion 16 which is continuously provided at the rear end of the tip forming portion 15 and can be bent in each of the up, down, left and right directions, and in a combined direction thereof, and at the rear end of the bending portion 16. The flexible tube portion 17 is continuously connected to the flexible tube portion 17 and has a flexible end portion. The rear end of the flexible tube portion 17 is connected to the operation portion 8.

Further, the operation section 8 includes an air supply / water supply button 18, a suction button 19, a bending operation switch section 20 for bending operation, and a clutch for setting the bending section 16 in a free state or a locked state. An F / L lever 22 that constitutes the means is provided. Air supply, water supply button 1 above
8 is operated to supply air or water from an air supply / water supply port (not shown) provided in the distal end forming portion 15, and by operating the suction button 19, the electronic endoscope 2 is operated. Suction is performed through a suction channel (not shown) provided inside. The bending operation switch section 20 is a joystick type having a lever 21.
By operating 1 in a two-dimensional manner, the curved portion 16 can be curved in a desired direction. By operating the F / L lever 22, the curved portion 16 can be brought into a free state or a locked state.

The tip forming section 15 is provided with an illumination window and an observation window, which are not shown. An emission end face of a light guide (not shown) is arranged inside the illumination window. The light guide is inserted through the insertion portion 7, the operation portion 8 and the universal cord 9, and the incident end portion is connected to the connector 10. A light source (not shown) is provided in the light source device 3 to which the connector 10 is connected, and illumination light emitted from the light source is incident on the incident end face of the light guide, and passes through the light guide to the illumination window. It is designed to irradiate the part to be inspected.

Although not shown, an objective optical system and a solid-state image pickup device, for example, a CCD, arranged at an image forming position of the objective optical system are provided inside the observation window. The signal line (not shown) connected to this CCD includes an insertion portion 7, an operation portion 8, a universal cord 9, and a connector 1.
0 is inserted through the cord 11 and is connected to the connector 12.

The video processor 4 to which the connector 12 is connected is provided with a video signal processing circuit (not shown), and the input end of the video signal processing circuit is the connector 1 described above.
2 is connected to a receptacle (not shown), and the output terminal of the video signal processing circuit is connected to the monitor 5
It is connected to the. The CCD is driven by the video signal processing circuit, and an image of a subject such as an inspected part formed on the photoelectric conversion surface of the CCD is photoelectrically converted by the objective optical system, and the video signal processing is performed as an image signal. Input to the circuit. Then, the image signal is converted into a video signal by the video signal processing circuit, and an image of a portion to be inspected or the like is displayed on the monitor 5 by the video signal.

A space 33 is defined by a main frame A31 and a main frame B32 inside the operation portion 8. In the space 33, the main frame A3 is formed.
The shaft 34 is vertically fixed from 1 to the main frame B32. In addition, the shaft 34 has a vertical (UD) that is rotatable around the shaft 34.
Driven gear 35 for directional bending and as power transmission means
And the sprocket 36 are provided so as to rotate integrally.

Further, the sprocket 36 has a UD
A chain 25 for direction bending is wound, and this chain 2
A curved wire (not shown) is connected to the end portion of 5 through a wire connecting member (not shown), and the other end portion of the curved wire is connected to the tip forming portion 15. ..

A gear and a sprocket, which are not shown in the figure, as power transmission means for bending in the left-right (RL) direction are also used for the UD.
The directional bending gear 35 and the sprocket 36 are arranged in the same configuration, and a chain (not shown) for bending the RL direction is wound around the sprocket for bending the RL direction to form a bending wire (not shown). They are connected via a wire connecting member (not shown), and the other end of the curved wire is connected to the tip forming portion 15.

Further, a motor frame 37 is provided on the surface of the main frame A31 facing the main frame B32. On the motor frame 37, a UD angle motor 38 and a RL angle motor serving as bending operation driving means. 39 and 39 are fixed side by side so that their respective rotation shafts are inserted through the holes formed in the motor frame 37 and extend downward.

That is, the description will be given to the case of bending in the UD direction. The rotating shaft 40 of the UD angle motor 38 is
The drive gear 41 as a power transmission means is inserted into the space 33 through the hole formed in the motor frame 37 and faces the space 33. It is provided. The above R
The L-angle motor 39 is also provided with the same configuration.

At both ends inside the motor frame 37, substantially parallel to the line connecting the axis center of the rotary shaft 40 of the UD angle motor 38 and the axis center of the shaft 34,
A guide rail A42 that penetrates the motor frame 37 and guides the sliding movement of the motor frame 37.
And a guide rail B43 are provided. One ends of the guide rail A42 and the guide rail B43 are fixed to the main frame A31 by fixing members 44 and 45, respectively, and the other end has a spring hooking portion 46. , 47 are formed.

Guide rail A42, guide rail B
Coil springs 48 and 49 are provided on the outer circumference of the motor 43 between the spring retaining portions 46 and 47 and the motor frame 37. The coil springs 48 and 49 allow the motor frame 37 to be fixed to the fixing member. The drive gear 41, which is interlocked with the motor frame 37, is biased in the direction in which it meshes with the gear 35.

Further, on the end faces of the motor frame 37 on the side of the fixing members 44 and 45, the flat surface portion 50a and the movable slope portion 5 are provided.
A cam groove 50 composed of 0b is formed as a cutout.

On the main frame A31,
When the casing 54 of the operation portion 8 is inserted, the F /
An F / L lever shaft 53 connected to the L lever 22 is rotatably held, and a cam plate 51 is provided at a midway portion of the F / L lever shaft 53 with the motor frame 3
It is extended and fixed toward the cam groove 50 formed in 7. Furthermore, the lower side of the cam plate 51 (the side of the cam groove 50)
A cam pin 52 that presses the cam groove 50 is provided on the.

That is, in the clutch means of this embodiment, the F / L lever 22 is rotated to rotate the F / L lever shaft 53 to move the cam plate 51 to move the cam pin 52. The motor frame 37 is moved to act on the cam groove 50, and the motor frame 37 is moved to the guide rail A.
42, and is configured to slide along the guide rail B43.

On the other hand, on the motor frame 37, a hook shaft 56 for rotatably supporting a hook 57 which constitutes a locking means is vertically provided, and on the main frame A31, the drive gear 41 is provided. And the gear 3
At the position where 5 is meshed with, a lock shaft 58 capable of hooking the hook 57 is vertically provided.

A coil spring 59 for hook is inserted above the hook 57 of the shaft 56 for hook,
One arm 59a of the hook coil spring 59 is hooked on the lock shaft 58, and the other arm 59a is also hooked.
The hook b is hooked on a hook spring shaft 62 vertically provided on the upper surface of the hook 57, and constantly urges the hook 57 in a direction away from the locking shaft 58. In addition, the hook 57 is formed with a protrusion that can come into contact with the side surface of the RL angle motor 39 in order to prevent the hook 57 from rotating.

A cam coil spring 63 is inserted above the cam plate 51 of the F / L lever shaft 53, and one arm 63a of the cam coil spring 63 is inserted.
Is hooked on a cam plate spring shaft 64 hung vertically on the cam plate 51, and the other arm 63b is hooked on a spring shaft 65 hung vertically on the upper surface of the main frame A31. The cam plate 51 is constantly biased in the direction of pressing the hook 57.

The biasing force of the hook coil spring 59 is set to be weaker than that of the cam coil spring 63. When the hook 57 and the cam plate 51 come into contact with each other, the hook 57 causes the cam plate to move. Pressed by 51,
It is adapted to be hooked on the lock shaft 58.

Next, the operation of the embodiment having the above structure will be described.

When the operator inserts the insertion portion 7 of the electronic endoscope 2 into a body cavity or the like and bends the bending portion 16 in the vertical direction, the F / L lever 22 is first locked (L). , The cam pin 52 of the cam plate 51 to the motor frame 37
The drive frame 41 and the driven gear fixed to the rotation shaft 40 of the UD angle motor 38 by positioning the motor frame 37 on the fixing members 44 and 45 side of the cam groove 50 formed on the flat member 50a. 35 is in a meshed state. At this time, the left and right (RL) direction bending drive gear and the driven gear (not shown) are also in mesh with each other.

Simultaneously with the above operation, the cam plate 51
Pushes and rotates the hook 57, and the hook 57 is hooked on the locking shaft 58 to be in a locked state.

Then, the UD angle motor 38 is driven by inclining the lever 21 of the bending operation switch section 20 in the designated direction, and the UD angle motor 3 is driven.
The drive gear 41 fixed to the rotating shaft 40 of No. 8 rotates. The rotation of the drive gear 41 is transmitted to the driven gear 35 and a sprocket 36 fixed to the driven gear 35, the chain 25 wound around the sprocket 36 moves, and a wire connecting member and a bending wire (not shown) are formed. Is bent and pulled to bend the curved portion 16 in the vertical direction.

Similarly, when the bending portion 16 is bent in the left-right direction, the lever 2 of the bending operation switch portion 20 is similarly provided.
By tilting 1 in the designated direction, the RL angle motor 39 is driven. Since the operation of the components in the RL direction is the same as that in the UD direction, only the UD direction will be described.

Here, even when an external force that separates the engagement between the drive gear 41 and the driven gear 35 is generated during power transmission from the drive gear 41 to the driven gear 35, the hook 57 is locked by the lock. Shaft 5
Since the motor frame 37 is locked by being locked by the motor 8, the drive frame 41 and the driven gear 35 can be surely maintained in the meshed state without moving the motor frame 37.

Next, when the insertion portion 7 of the electronic endoscope 2 is to be removed from the body cavity or the like, the F / L lever 22 is rotated to the free (F) state side, and the F / L lever 22 is rotated. F /
The cam plate 51 is rotated via the L lever shaft 53, and the cam pin 52 of the cam plate 51 is moved along the moving slope portion 50b of the cam groove 50 formed in the motor frame 37. Then, along with the movement of the cam pin 52, the motor frame 37 is guided by the guide rail A4.
2, the fixing members 44, 4 along the guide rail B43
It is slid in the direction away from 5, and as a result, the engagement between the drive gear 41 and the driven gear 35 is cut.

Simultaneously with the above operation, the cam plate 51
Is separated from the hook 57, so that the hook 57 is rotated by the biasing force of the coil spring 59 for hook and separated from the shaft 58 for locking.

Here, the cam pin 52 is connected to the cam groove 5
Even if it is positioned on the moving slope 50b of 0, the coil spring 4
The urging forces of Nos. 8 and 49 act more strongly than the urging force of the cam coil spring 63, and the cam pin 52 causes the cam groove 50 to move.
It does not come off from the moving slope portion 50b.

Therefore, the sprocket 36 fixed to the driven gear 35 can be freely rotated by an external force applied to the bending portion 16, and a sprocket (not shown) for bending in the left-right direction is similarly attached to the bending portion 16. Since it can be rotated by such an external force, it is in a free state. In this free state, the insertion part 7 is removed from the body cavity or the like.

As described above, the clutch mechanism is such that one of the meshing gears of the transmission gear train constituting the power transmission mechanism is meshed with the meshing point in a direction substantially normal to the pitch circle and is separable. By providing a lock mechanism that keeps the mechanism connected, a compact, lightweight, and simple structure realizes a reliable locked state and free state, and even when a load is applied from the outside during bending, reliable bending operation is possible. It becomes possible to do it.

Although the present embodiment has been described as an embodiment applied to an electronic endoscope, the present invention is not limited to the electronic endoscope.
Other endoscopes such as a fiberscope may be used.

[Second Embodiment] FIG. 6 is a schematic plan view showing the position of the driving device in the bending operation portion in the locked state according to the second embodiment of the present invention.

In the second embodiment, a hook portion for stopping the movement of the motor frame is formed together with the cam groove in the motor frame without providing the hook mechanism as in the first embodiment. The cam plate that slides the frame is also used as a hook.

That is, as shown in FIG. 6, the end faces of the fixing members 44 and 45 of the motor frame 80 slidably provided on the main frame A31 inside the operation portion are
A groove 81 including a hook portion 81a, a flat surface portion 81b, and a moving slope portion 81c is cut out.

Further, as in the first embodiment, the F / L lever shaft 53 connected to the F / L lever (not shown) is connected.
A cam plate 82 is extended and fixed to the groove 81 in the middle part, and the lower side (the groove 81 side) of the cam plate 82 can press the groove 81 or can be locked. A cam pin 83 is provided.

With such a structure, in order to make the free state, the F / L lever (not shown) is rotated to move the cam plate 82, and the cam pin 83 of the cam plate 82 is moved. It is realized by locating on the moving slope portion 81c of the groove 81.

Then, in order to make it possible to bend, F /
The L-lever (not shown) is connected to the cam pin 83 and the groove 8
It is rotated in a direction (direction of the flat surface portion 81b of the groove 81) away from the first moving slope portion 81c. With the movement of the cam pin 83, the spring retaining portions 46 and 47 and the motor frame 37
The motor frame 37 is slid by the biasing force of the coil springs 48 and 49 interposed between the drive gear (not shown) and the driven gear (not shown).

Further, when the F / L lever is rotated to engage the cam pin 83 with the hook portion 81a of the groove 81, the spring retaining portions 46 and 4 of the motor frame 37 are provided.
The sliding movement to the 7 side is suppressed, and it is possible to maintain the positive engagement state between the drive gear and the driven gear.

As described above, by forming the hook portion together with the cam groove on the motor frame, the lock mechanism can be simplified and realized with a small number of parts.

The rest of the configuration and operation are the same as those of the first embodiment and will not be described.

{Third Embodiment} FIG. 7 is a schematic plan view showing the position of the driving device in the bending operation portion in the locked state according to the third embodiment of the present invention.

In the third embodiment, the cam plate, which has both the function of sliding the motor frame and the function of locking the motor frame in the second embodiment, is provided exclusively for the sliding movement of the motor frame. In addition, a lock plate for locking the motor frame is provided.

That is, as shown in FIG. 7, a lock plate shaft 90 is vertically provided on the upper surface of the main frame A31, and a lock plate 91 is formed on the motor frame 37 in the middle of the lock plate shaft 90. It is rotatably extended toward the groove 81.
Further, on the lower side (on the side of the groove 81) of the lock plate 91, a lock pin 92 capable of locking the hook portion 81a of the groove 81 is provided.

A coil spring 93 is inserted into the lock plate shaft 90 above the lock plate 91, and one arm 93a of the coil spring 93 is inserted.
Is hooked on a lock spring shaft A94 vertically provided on the upper surface of the lock plate 91, and the other arm 93b.
Is hooked on a lock spring shaft B95 vertically provided on the upper surface of the motor frame 37 and urges the lock plate 91 in a direction away from the hook portion 81a of the groove 81. With the rotation of the cam plate 82, they can be rotated together.

With such a structure, in order to make the curved state possible, the cam pin 83 of the cam plate 82 of the F / L lever (not shown) is brought into contact with the groove 81 of the motor frame 37.
Of the groove 81 (the plane portion 8 of the groove 81)
1b direction). Along with the movement of the cam pin 83, the motor frame 37 is slid by the urging force of the coil springs 48, 49 interposed between the spring retaining portions 46, 47 and the motor frame 37, and the driven gear (not shown) is driven. A drive gear (not shown) is engaged with the.

At this time, the cam plate 82 pushes and rotates the lock plate 91, and the lock pin 92 of the lock plate 91 is engaged with the hook portion 81a of the groove 81. Then, the spring retaining portion 4 of the motor frame 37 is
The sliding movement to the 6 and 47 sides is suppressed, and a reliable meshing state between the drive gear (not shown) and the driven gear can be maintained.

Further, in order to change from the bendable state to the free state, the F / L lever (not shown) is rotated to move the cam pin 83 of the cam plate 82 to the moving slope 81c of the groove 81. Position it. Then, the lock plate 9
1 is that the lock pin 92 of the lock plate 91 causes the hook portion 81 of the groove 81 by the biasing force of the coil spring 93.
The motor frame 37 is rotated so as to be disengaged from a, and the motor frame 37 is slid toward the spring retaining portions 46 and 47 to release the meshing between the driven gear and the drive gear (not shown).

As described above, by providing the lock plate for locking the motor frame, the locked state can be realized with a small amount of operation.

[0068]

As described above, according to the present invention, in an endoscope using a motor or the like as a drive source for the bending operation, a lock mechanism for keeping the clutch mechanism in the connected state is provided. With the structure, a reliable locked state and a free state are realized, and even when a load is applied from the outside during bending, it is possible to perform a reliable bending operation.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing a drive device position in a bending operation section in a locked state according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram of the entire configuration of an endoscope apparatus according to a first embodiment of the present invention.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a schematic plan view showing a drive device position in the bending operation unit in a free state according to the first embodiment of the present invention.

5 is a sectional view taken along line VV of FIG.

FIG. 6 is a schematic plan view showing the position of the driving device in the bending operation portion in the locked state according to the second embodiment of the present invention.

FIG. 7 is a schematic plan view showing the position of the drive device in the bending operation portion in the locked state according to the third embodiment of the present invention.

[Explanation of symbols]

 2 endoscope 7 insertion part 16 curved part 22 F / L lever 25 chain 35 driven gear 36 sprocket 37 motor frame 38 UD angle motor 39 RL angle motor 41 drive gear 42 guide rail A 43 guide rail B 50 cam groove 51 Cam plate 52 Cam pin 57 Hook 58 Shaft for lock

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[Procedure amendment]

[Submission date] April 1, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0036

[Correction method] Change

[Correction content]

A torsion coil spring 59 for hook is inserted above the hook 57 of the shaft 56 for hook, and one arm 59 of the torsion coil spring 59 for hook is inserted.
a is hooked on the lock shaft 58, and the other arm 59b is hooked on a hook spring shaft 62 vertically provided on the upper surface of the hook 57 to hook the hook 57.
Is always biased in a direction away from the lock shaft 58. The hook 57 has the hook 5
In order to prevent the rotation of 7, the RL angle motor 3
9 is formed with a protrusion that can come into contact with the side surface.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0037

[Correction method] Change

[Correction content]

A cam torsion coil spring 63 is inserted above the cam plate 51 of the F / L lever shaft 53, and one arm 63a of the cam torsion coil spring 63 is on the cam plate 51. It is hooked on a cam plate spring shaft 64 that is vertically installed on the
Is hooked on a spring shaft 65 vertically provided on the upper surface of the main frame A31 to constantly urge the cam plate 51 in a direction of pressing the hook 57.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction content]

The biasing force of the hook torsion coil spring 59 is set to be weaker than that of the cam torsion coil spring 63, and when the hook 57 and the cam plate 51 come into contact with each other, the hook 57 causes the hook 57 to move. It is adapted to be pressed by the cam plate 51 and hooked on the lock shaft 58.

[Procedure correction 4]

[Document name to be amended] Statement

[Correction target item name] 0046

[Correction method] Change

[Correction content]

Simultaneously with the above operation, the cam plate 51
Is separated from the hook 57, so that the hook 57 is rotated by the urging force of the hook torsion coil spring 59 and separated from the locking shaft 58.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0047

[Correction method] Change

[Correction content]

Here, the cam pin 52 is connected to the cam groove 5
Even if it is positioned on the moving slope 50b of 0, the coil spring 4
The biasing forces of Nos. 8 and 49 act more strongly than the biasing force of the cam torsion coil spring 63, and the cam pin 52 does not come off the moving slope portion 50b of the cam groove 50.

[Procedure Amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0063

[Correction method] Change

[Correction content]

The lock plate shaft 90 has a torsion coil spring 9 above the lock plate 91.
3 is inserted, one arm 93a of the torsion coil spring 93 is hooked on a lock spring shaft A94 vertically provided on the upper surface of the lock plate 91, and the other arm 93b is connected to the motor frame 37. The lock plate 91 is hooked by a lock spring shaft B95 vertically provided on the upper surface, and urges the lock plate 91 in a direction away from the hook portion 81a of the groove 81, so that the lock plate 91 rotates the cam plate 82. Along with this, they can be rotated together.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0065

[Correction method] Change

[Correction content]

At this time, the cam plate 82 presses and rotates the lock plate 91, and the lock pin 92 of the lock plate 91 is engaged with the hook portion 81a of the groove 81. Then, the spring retaining portion 4 of the motor frame 37 is
The sliding movement to the 6 and 47 sides is suppressed, and a reliable meshing state between the drive gear (not shown) and the driven gear can be maintained. Here, the cam pin 83 of the cam plate 82 is
Since it is located on the moving slope 81c of the groove 81,
The lock plate 91 of the groove 81 is
It is in a state of being biased toward the hook portion 81a side. Therefore,
The arm 93a of the torsion coil spring 93 locks the lock plate.
91 pushes the cam pin 83 to hook 81 a of the groove 81.
It does not deviate from.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Name of item to be corrected] 0066

[Correction method] Change

[Correction content]

Further, in order to change from the bendable state to the free state, the F / L lever (not shown) is rotated to move the cam pin 83 of the cam plate 82 to the moving slope 81c of the groove 81. Position it. Then, the lock plate 9
1 is rotated by the urging force of the torsion coil spring 93 so that the lock pin 92 of the lock plate 91 is disengaged from the hook portion 81a of the groove 81, and the motor frame 37 is attached to the spring hooking portions 46 and 47. The driven gear and the drive gear (not shown) are disengaged by being slid to.

Claims (1)

[Claims] 1. A pulling operation means for bending a bending portion provided in an insertion portion, a power transmission means capable of transmitting power from a bending operation driving means to the pulling operation means, and a power transmission of the power transmission means. An endoscope comprising: a clutch means for connecting and disconnecting, and a lock means for maintaining a connected state of the clutch means.