JP2862188B2 - Endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope having a plurality of switches.

[0002]

2. Description of the Related Art In recent years, by inserting an elongated insertion portion into a body cavity, it is possible to observe internal organs in the body cavity or to perform various treatments using a treatment tool inserted into a treatment tool channel as necessary. Endoscopes are widely used.

[0003] Various electronic endoscopes using a solid-state imaging device such as a charge-coupled device (CCD) as an imaging means are also used.

[0004] An operation unit serving also as a grip unit is provided on the hand side of the insertion unit of the endoscope. The operation unit is provided with an air supply / spray button for cleaning the objective lens system, a suction button for sucking the washing water, a gas button for sending gas into the body cavity, and the like provided at the distal end of the insertion unit. Further, in the electronic endoscope, in addition to the above, a freeze switch for stopping an observation image displayed on a monitor, a release switch for recording the still image, and a VTR switch for recording a moving image of the observation image are provided. Etc. are provided.

Hereinafter, a conventional example will be described with reference to the drawings.
18 and 19 relate to a conventional example, FIG. 18 is an explanatory diagram of an operation unit having a focus adjusting ring, and FIG. 19 is an explanatory diagram illustrating a configuration of the focus adjusting ring.

As shown in FIG. 18, a focus adjusting section 174 is provided at the rear end of the operation section 173, and a switch section 135 is provided at the rear of the focus adjusting section 174. An air supply / spray button 128 is provided on the side of the operation unit 173.
And a suction button 129 are provided.
Inside the tube 1 connected to each button 128, 129
76 are provided. Before the tube 176 or the like is attached to the rear end surface in the operation portion 173 so that the attachment is not hindered by the tube 176 or the like, the switch portion 13 is set in advance.
5 is provided with a long screw 177.

In FIG. 19, the screw 177 penetrates a fixing member 178 constituting a focus adjusting section 174. A focus adjusting ring 179 is rotatably provided on the outer periphery of the fixing member 178. A female screw 181 is threaded on the inner peripheral surface of the focus adjustment ring 179. A recess 182 is provided in a part of the outer peripheral surface of the fixing member 178, and a moving piece 183 is provided in the recess 182 so as to be slidable in the longitudinal direction of the endoscope insertion section. A screw portion 184 that is screwed into the female screw 181 is provided on an outer peripheral side surface of the moving piece 183, and a rear end portion of the moving wire 172 inserted through the insertion portion is connected to a side surface of the operating portion 173. I have.

The moving piece 183 has a focus adjusting ring 179.
Is rotated in the longitudinal direction of the insertion portion, whereby the movement wire 172 is pulled, and the focus of an objective lens system (not shown) provided at the distal end of the insertion portion can be adjusted.

A pin 180 is driven into the portion of the screw 177 that is exposed from the fixing member 178 on the side of the screw portion after the inside of the fixing member 178 is inserted.
The pin 180 prevents the screw 177 from dropping during other operations because the screw 177 is attached in advance.

The screw 177 is screwed into the switch unit 135 to fix the switch unit 135.

[0011]

However, at the time of observation with an endoscope, the operator first has to adjust the focus adjusting ring 1.
Rotate 79 to adjust the focus of the objective lens system. And
A desired observation site is observed, and if necessary, the air supply / spray button 128 and the suction button 129 are operated. In an electronic endoscope, a freeze switch for stopping the observation image or a still image is used. A plurality of switches, such as a release switch for recording an image and a VTR switch for recording an observation image as a moving image, are operated. That is, the frequency of operation of the focus adjustment ring 179 is extremely lower than the frequency of operation of the switch unit 135.

In the conventional endoscope, a focus adjusting mechanism composed of a focus adjusting ring 179 and the like is provided at the rear end of the operation unit 173, and a switch unit 135 is provided at the rear end of the focus adjusting ring 179. It is difficult to operate these switches and buttons with the fingers of the hand holding the operation unit.

The present invention has been made in view of the above circumstances, and has an optical system focus adjusting means and a plurality of operation switches. The plurality of switches can be easily operated by fingers of a hand holding an operation section. It is an object of the present invention to provide an endoscope that can be operated at any time.

[0014]

An endoscope according to the present invention has a distal end.
Operation for remotely controlling the optical system
An insertion portion provided with a wire; and an insertion portion connected to the insertion portion.
A box provided with a gripper and multiple image operation switches from the side
An operation unit provided with a rotation operation unit provided on the opposite side of the insertion unit of the gripping unit for remotely adjusting the optical system;
This rotation operation of the rotation operation unit is performed by moving the operation wire forward and backward.
In an endoscope having an optical system adjusting means having a conversion mechanism for converting the even least <br/> conversion mechanism of the optical system adjusting means inside the box making body having a plurality of image manipulation switch A part is provided, and a rotation operation part of the optical system adjusting means is exposed from the box, and at least one of the image operation switches is constituted by an elastic push button and a switch body separate from the push button. The push button is provided integrally with the rotary operation unit on the rotation center axis of the rotary operation unit, and the switch body is separated from the lower side of the push button and fixed inside the box. .

[0015]

[ Operation ] The grip of the operation unit is gripped, and the rotation of the optical system adjustment unit is performed.
While operating the roll operation unit, the box is
And a switch provided on the rotation operation unit is operated.

[0016]

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

FIGS. 1 to 17 relate to an embodiment of the present invention. FIG. 1 is an exploded perspective view of a switch unit, FIG. 2 is a perspective view of a bottom side of a focus adjusting lever, and FIG. FIG. 4 is a perspective view of a rear end portion of the endoscope operation unit, FIG. 5 is a cross-sectional view taken along line AA ′ of FIG. 4, and FIG.
FIG. 7 is an explanatory view illustrating a connection means between the switch and the signal line, FIG. 8 is an explanatory view illustrating a state of the signal line in the switch unit, FIG. 9 is a perspective view illustrating a configuration of a moving piece, FIG.
0 is a sectional view taken along the line XX ′ of FIG. 5, and FIG.
FIG. 12 is a cross-sectional view taken along the line C ′, FIG. 12 is an explanatory diagram for explaining a connection state between the focus adjustment lever and the control member in the form of an occlusal clutch, FIG. 13 is an explanatory diagram for explaining a modification of FIG. FIG. 15 is a perspective view of an operation section showing a first modification of the endoscope, FIG. 15 is a perspective view of an operation section showing a second modification of the endoscope, and FIG. 16 is a view of the operation section showing a third modification of the endoscope. FIG. 17 is a perspective view of an operation unit showing a fourth modification of the endoscope.

As shown in FIG. 3, the endoscope apparatus 1 has a built-in electronic endoscope 3 and a light source unit for supplying illumination light of the electronic endoscope 3, and is transmitted from the electronic endoscope 2. Control device 5 for processing image signals output from the control device 5, a television monitor 7 for displaying an image signal output from the control device 5 on a screen, and a plurality of peripheral devices 5 such as a VTR connected to the control device 3.
a, 5b, 5c,...

The electronic endoscope 3 has an elongated and flexible insertion portion 9, and a large-diameter operation portion 11 is provided at the rear end of the insertion portion 9.
Are connected. A universal cord 25 extends from the side of the operation unit 11, and a light source and a signal connector provided at the tip of the universal cord 25 are provided.
27 is connected to the control device 5.

The insertion portion 9 has a long flexible tube portion 13, a bending portion 15 connected to the distal end of the flexible tube portion 13, which can be bent in the up / down / left / right directions. And a tip portion 17 connected to the tip portion.

A treatment tool insertion port 19 is provided on the side of the operation unit 11 and communicates with a treatment tool channel (not shown) provided in the insertion unit 9 . Furthermore, this insertion slot 1
An air supply / spray button 21 for cleaning an objective lens system (not shown) provided at the distal end of the insertion section 13 and a suction button 23 for sucking the cleaning water are provided behind the insertion section 13. On the other side of the operation section 11, two bending operation knobs 16 for bending the bending section 15 in the up / down / left / right directions are provided.
a and 16b are provided.

Further, a switch section 11a is provided at the rear end of the operation section 11, and on one side of the switch section 11a, for example, an observation image displayed on the television monitor 7 is stopped. A freeze switch device 20b is provided. Further, a release switch 20a for recording an image stopped by the freeze switch device 20b is provided on the rear end surface of the switch portion 11a, and a release switch 20a is provided on the other side opposite to the freeze switch device 20b. Is a VTR switch device 20c for recording a moving image of an observation image
Is provided.

As shown in FIG. 1, the switch portion 11a includes a focus adjusting lever 2 having a protruding portion,
A control member 6 for controlling a rotation range of the focus adjustment lever 2, a helicoid member 8 having a helicoid screw formed on an inner wall, an outer wall member 10, and a groove 12a in which a moving piece described later moves up and down. Airway forming member 12 and bottom member 1
4 mainly on the central axis OO ′ of the operation unit 11 in this order.

The focus adjusting lever 2 has a plurality of, for example, 36 convex portions 2a as shown in FIG.
The control member 6 is connected in the form of an occlusal clutch of 18 concave portions 6a provided on the upper end surface, and is provided on the side surface of the control member 6 from a plurality of, for example, three holes 2b provided on the side surface of the focus adjustment lever 2. It is fixed by inserting a screw (not shown) into the groove 6c. The control member 6 is connected to the helicoid member 8 by screwing.
Further, the hollow path forming member 12 is inserted into the outer wall member 10 and fixed by screws (not shown). Furthermore,
The control member 6 is provided rotatably by fixing the fixing member 4 and the hollow path forming member 12 with screws (not shown).

FIG. 4 shows a rear end portion of the operation section 11 having such a switch section 11a. 4A is a top view of the rear end of the operation unit 11 as viewed from above, and FIG. 4B is a side view of the rear end of the operation unit 11 as viewed from the side. The bending section 16a, 16b and the universal cable 25 are provided on the side surface of the rear end of the operation section 11, and the bottom member 1 is provided on the rear end side.
4. An outer wall member 10 and a focus adjusting member 2 are provided.
The rotation range of the convex portion of the focus adjustment member 2 lever is indicated by an arrow.
Does not interfere with the operation of other bending operation levers, etc.
The focus adjustment member 2 is set
-Does not rotate.

Next, a detailed configuration of the switch section 11a will be described. FIG. 5 is a cross-sectional view taken along line AA ′ of FIG. FIG. 6 is a sectional view taken along line BB ′ of FIG.

As shown in FIG. 6, the switch unit 11a
The outer wall member 10 is fixed to the hollow path forming member 1 by the fixing screw 53.
It is fixed to 2. Further, when the helicoid member 8 screwed to the control member 6 connected to the focus adjustment lever 2 in the form of an occlusal clutch rotates, the outer wall member 10 is rotated.
In order to prevent the abrasion of the abrasion, a wear prevention member 52 is provided. Further, the focus adjustment lever 2, the fixing member 4, the control member 6, the helicoid member 8, the outer wall member 10,
The hollow path forming member 12 and the bottom member 14 are connected in a sealed state by an O-ring.

Further, in the structure of the switch device 20a, a mounting hole 38 is formed in the focus adjusting member 2, and a concave portion 39 is formed on the outer peripheral side of the mounting hole 38. In this concave portion 39, a waterproof film 41 formed in a substantially hat shape with rubber of an elastic material is provided by joining a peripheral flange portion 42. The flange portion 42 is provided with a support member 43 fitted in the mounting hole 38. Has been fixed by. The support member 43 is formed with a band-shaped protrusion 44 that contacts the inner surface of the flange portion 42 and a step 46 having a surface that joins the end surface and the inner surface of the flange portion 42. A screw 47 is formed on the protruding portion. This screw 47 has a nut body 4
8 is screwed. Therefore, when the nut body 48 is tightened, the flange portion 42 of the waterproof film 41 is
Is pressed down.

In this case, since the flange portion 42 is restricted from being elastically deformed in the radial direction by the step portion 46 of the support member 43, the outer surface of the flange portion 42 is strongly pressed against the concave portion 39. Further, the waterproof membrane 41
A plunger 49 protrudes from the center of the inner surface, and the tip of the plunger 49 faces a switch 18a provided on the outer wall member 10. Therefore, if the waterproof film 41 is pressed from the outer surface and deformed, the switch 18a can be operated. The plunger 49 is fitted with a metal tubular body 50 to prevent the plunger 49 from being deformed.

The configuration of the switch devices 20b and 20c is as follows: the focus adjusting member 2, the mounting hole 38 formed in the focus adjusting member 2, and the concave portion 39 formed on the outer peripheral side of the peripheral portion of the mounting hole 38. Instead, the fixing member 51 is integrally provided on the outer wall member 10. Other configurations are the same as those of the switch device 20a.

As shown in FIG. 7A, the switch device 2
The connection between the switch 18b and the signal line 35 is made by connecting the terminal 31 of the commercially available switch 18b directly fixed to the switch fixing position 30 of the outer wall member 10 with an adhesive or the like.
Are oriented in the direction in which the signal line 35 is pulled out.
This is done by soldering the signal line 35 to the
I have. By connecting in this manner, the switch 18b
And the signal line 35 can be compactly connected.
You.

The signal line 35 is connected to the terminal 3 at the time of soldering.
1 is hardened at the solder connection, so
You must turn a little distance to turn. Therefore, the connection between the switch 18c of the switch device 20c and the signal line 35 is as follows.
As shown in FIG. 7B, for example, the terminal 31 of the switch 18b is bent to be connected to the signal terminal 32 at right angles by soldering. Thus, soldering
Switch 18 which is usually mounted on a printed circuit board before performing
By bending the terminal 31 of FIG.
The hardening of the connection part makes it difficult for the terminal 31 to be bent,
The switch 18b and the signal line 35 are not damaged.
Connection can be made more compact. Ma
Also, connection by soldering is made even more compact
Therefore, according to the space, the switch 18a of the switch device 20a may be connected to a solder , for example, as shown in FIG.
Switches usually mounted on printed circuit boards before mounting
By bending the terminal 31 of 18b, the signal line 35
Are connected along the terminals 33 by soldering.
Note that, as shown in FIG.
By cutting off the unnecessary terminals 34 of the switches 18a, 18b and 18c of the switches 0b and 20c,
a, 18b and 18c can be arranged more compactly.

As shown in FIG. 8, the solder mass 36
Is connected through the hollow path 12b provided in the hollow path forming member 12, and the signal line 35 connected by the
Guided through the universal cable 25,
It is connected to the control device 5. Hollow path forming member 12
A hard adhesive 37 is filled between the upper end portion of the switch and the outer wall member to fix the signal line 35, thereby preventing an external force such as stress from directly acting on a connection portion between the signal line 35 and each switch. . Further, a gap generated between the outer wall member 10 and the bottom member 14 is filled with the hard adhesive 37, and the outer wall member 10 and the bottom member 14 are further bonded and fixed with, for example, a soft adhesive 55. . By doing so, unnecessary gaps are eliminated, and maintenance such as cleaning becomes easy.

In FIG. 6, the helicoid member 8 is provided in a groove 12a provided in the hollow path forming member 12.
The movable piece 60 is slidably moved in the longitudinal direction of the endoscope insertion section 7 by the helicoid screw 8a provided on the inner peripheral surface of the endoscope.

As shown in FIG. 9, a screw portion 61 screwed to the helicoid screw 8a is provided on the outer peripheral side surface of the moving piece 60.
Further, a hollow path 60a is provided at the center of the moving piece 60 so that the moving wire 64 can be inserted therethrough. A fixed portion 6 is provided at the rear end of the moving wire 64.
The moving wire 64 is rotatably held by the U-shaped member 62 with respect to the moving piece 60.

Therefore, the moving piece 60 moves in the longitudinal direction of the insertion portion by rotating the focus adjustment lever 2,
By this movement, the movement wire 64 is pulled so that the focus of an objective lens system (not shown) provided at the distal end of the endoscope 3 can be adjusted.

Next, control of the rotation range of the focus adjustment lever 2 by the control member 6 and connection by an occlusal clutch will be described.

FIG. 1 is a sectional view taken along line XX 'of FIG.
As shown at 0, first, the fixing member 4 is fixed to the hollow path forming member 12 by the screw 65, and the fixing member 4 holds the control member 6 rotatably. A control screw 66 is screwed into the control member 6 and is screwed and fixed to the hollow path forming member 12 shown by a broken line.
7, the rotation range of the focus adjustment lever 2 is regulated.

As shown in FIG. 11 which is a cross-sectional view taken along the line CC ′ of FIG. 10, a regulating screw 67 screwed and fixed to the hollow path forming member 12 connected to the focus adjusting lever 2 in the form of an occlusal clutch. A plurality provided on the side surface of the control member 6,
For example, two control screws 66 screwed into and fixed to a desired screw hole out of the 36 female screw holes.
And regulates the rotation range of the control member 6.

That is, the turning range of the focus adjusting lever 2 connected in the form of an occlusal clutch is adjusted by, for example, the projecting portion of the focus adjusting lever 2 being located on the side surface where the bending operation knobs 16a and 16b are provided. These bending operation knobs 16a, 16
When operating b, focus adjustment lever 2 once adjusted
The projection is restricted to the rotation range so that the focus adjustment is not disturbed.

As shown in FIG. 12, in the connection between the focus adjusting lever 2 and the control member 6 in the form of an occlusal clutch, the control member 6 is provided with a plurality of, for example, eighteen concave portions as described above. Correspondingly, 36 convex portions, which are double the concave portions, are formed inside the focus adjusting lever 2.
The recesses of the control member 6 have the same width as the recesses and the same pitch between the recesses, and the same pitch between the protrusions inside the focus adjustment lever 2 is the same pitch between the recesses. Half of it.

Therefore, as shown in FIG.
For example, the convex portion 2a1 of the focus adjusting lever 2 is engaged with the concave portion 6a1 of the control member 6, the convex portion 2a2 and the convex portion 2a3 of the focus adjusting lever 2 are engaged with the concave portion 6a2 of the control member 6, and then the focus adjustment is performed. By rotating the lever 2, FIG.
As shown in (B), the convex portion 2a1 and the convex portion 2a2 of the focus adjustment lever 2 engage with the concave portion 6a2 of the control member 6, and the convex portion 2a3 of the focus adjustment lever 2 can engage with the concave portion 6a3. At 10 °, the focus adjustment lever 2 can be engaged at a desired relative position of the control member 6.
Generally, the concave portion of the control member 6 is processed by the focus adjustment lever 2.
Although it is more difficult to form the convex portion of the control member 6 in this manner,
Even if the number of the concave portions is half of the number of the convex portions of the focus adjusting lever 2, the focus adjusting lever 2 can be adjusted to a desired relative position of the control member 6 without lowering the resolution. Although the concave portion of the control member 6 has a teaspoon shape as shown in FIG. 12, it is not limited to this, and may be a circular concave portion 6a 'of the control member 6' as shown in FIG. In this case, the shape of the convex portion 2a 'formed inside the focus adjusting lever is a leaf shape corresponding to the circular concave portion 6a'.

The operation of the endoscope configured as described above will be described.

The operator grasps the operation section 11 and inserts the insertion section 9 into the body cavity. When the surgeon observes the observation site while observing the television monitor 7 , the operator first rotates the focus adjustment lever 2 to move the moving piece 61, and the moving piece 61 is not provided on the distal end portion 17 of the endoscope 3. Adjust the focus of the optical lens system. Next, when recording a still image of the observation site, the operator holds the operation unit 11 of the endoscope 3 while pressing the freeze switch device 20b with the finger of the gripped hand to stop the image. When a still image is recorded by pressing the release switch device 20a, and when a moving image is recorded on the VTR, the moving image is recorded by pressing the VTR switch device 20c. Further, the air supply / spray button 21 and the suction button 23 are operated as needed.

As described above, in the endoscope of the present embodiment, the mechanism of the focus adjustment lever 2 is compactly provided in the switch section 11a of the operation section 11, so that the release switch device 20 is provided.
a, the operation of the freeze switch device 20b, the VTR switch device 20c, the air supply / spray button 21, the suction button 23, etc., is easily performed by the fingers of the gripped hand while holding the operation unit 11 of the endoscope 3. Can be done.

As a first modified example of this embodiment, as shown in FIG. 14, an eyepiece section 80 having an eyepiece lens system (not shown) is provided. A plurality of switches 80b and 80c provided in the operation unit with a mechanism for adjusting the diopter of the eyepiece system of the eyepiece 80 by rotating the diopter adjustment ring 80a of the eyepiece system of the eyepiece 80 are provided. An endoscope may be used.

As a second modification of this embodiment, FIG.
As shown in the figure, a focus adjustment mechanism is provided in the operation unit, and a focus adjustment lever 81 of an occlusal clutch type is switched to
a may be arranged on the side surface on which the universal cable 25 is provided.

As a third modification of the present embodiment,
As shown in FIG. 16, the eyepiece camera diopter adjustment ring unit 84
A release switch device 85a for controlling the television camera, wherein a mechanism for adjusting the diopter of the lens system of the television camera connected to the eyepiece diopter adjustment ring portion 84 is provided in the operation section; In an endoscope provided with the switch device 85b, the focus adjustment lever 86 in the form of an occlusal clutch may be provided concentrically with the bending operation knobs 16a and 16b of the switch section 11a.

Further, as a fourth modified example of the present embodiment, as shown in FIG. 17, a focus adjusting mechanism is provided in the operating section, and a plurality of projections 83a of the focus adjusting lever 83 of an occlusal clutch type are provided. Three, a plurality of image control switch devices 82a, 82b, 82c, 82d may be provided.

Also in these modified examples, since the adjusting mechanism of the optical lens system is provided inside the operation unit 11 of the endoscope 3, the operation unit 11 of the endoscope 3 can be downsized.
Needless to say, while the operation unit 11 of the endoscope 3 is gripped, the operation of each switch device can be easily performed with the fingers of the gripped hand.

[0051]

As described above, according to the present invention, the operation is
Hold the grip of the working unit, and rotate the operating unit of the optical system
The finger of one hand that operates and grips the grip of the operation unit
Thus, there is an effect that switches provided on the housing and the rotary operation unit can be easily operated.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a switch unit according to one embodiment.

FIG. 2 is a bottom perspective view of a focus adjustment lever according to one embodiment.

FIG. 3 is a configuration diagram illustrating a schematic configuration of an endoscope apparatus according to one embodiment.

FIG. 4 is a perspective view of a rear end portion of the endoscope operation section according to one embodiment.

FIG. 5 is a sectional view taken along line AA ′ of FIG. 4 according to one embodiment.

FIG. 6 is a sectional view taken along line BB ′ of FIG. 5 according to one embodiment.

FIG. 7 is an explanatory diagram illustrating connection means for connecting a switch and a signal line according to one embodiment.

FIG. 8 is an explanatory diagram illustrating a state of a signal line in a switch unit according to one embodiment.

FIG. 9 is a perspective view showing a configuration of a moving piece according to one embodiment.

FIG. 10 is a sectional view taken along line XX ′ of FIG. 5 according to one embodiment.

FIG. 11 is a cross-sectional view taken along line CC ′ of FIG. 10 according to one embodiment.

FIG. 12 is an explanatory diagram illustrating a connection state between a focus adjustment lever and a control member in the form of an occlusal clutch according to one embodiment.

FIG. 13 is an explanatory diagram illustrating a modification of FIG. 12 according to an embodiment.

FIG. 14 is a perspective view of an operation unit showing a first modification of the endoscope according to one embodiment.

FIG. 15 is a perspective view of an operation unit showing a second modification of the endoscope according to one embodiment.

FIG. 16 is a perspective view of an operation unit showing a third modification of the endoscope according to one embodiment.

FIG. 17 is a perspective view of an operation unit showing a fourth modification of the endoscope according to one embodiment;

FIG. 18 is an explanatory diagram of an operation unit having a focus adjustment ring according to a conventional example.

FIG. 19 is an explanatory diagram illustrating a configuration of a focus adjustment ring according to a conventional example.

[Explanation of symbols]

 2 Focus adjusting lever 4 Fixing member 6 Control member 8 Helicoid member 10 Outer wall member 11 Operating part 11a Switch part 12 Hollow path forming member

Claims (1)

(57) [Claims] An optical system is provided at a tip, and said optical system is remotely controlled.
An insertion portion provided with an operation wire for making
Connected to the insertion part, and a plurality of image operation switches from the insertion part side.
An operation unit having a box provided with a switch, and an insertion unit for the gripping unit
For remotely adjusting the optical system
Rotation operation part and the rotation operation of this rotation operation part
An endoscope having an optical system adjustment unit having a conversion mechanism for converting the operation into a wire advance / retreat operation , wherein at least a part of the conversion mechanism of the optical system adjustment unit is provided inside a box provided with the plurality of image operation switches. Provided, while exposing the rotation operation unit of the optical system adjustment means from the box, at least one of the image operation switches is configured by a push button having elasticity and a switch body separate from the push button, Press the push button on the rotary operation unit.
The rotation operating portion and integrally provided on the rotation center axis, wherein a box body spaced the switch body below the push button
An endoscope fixed to a part .