JPH05211987A - Push button apparatus for endoscope - Google Patents

Abstract

PURPOSE:To provide a push button apparatus for an endoscope pushing vertically an elastic contact when a finger hooking member is operated not only in the vertical direction but also in the transverse direction or even in the oblique direction. CONSTITUTION:A push button apparatus is formed with a finger hooking member 40 projecting to the side of an operating part 24, the first and the second stems 41 and 42 transmitting a press force actuating on this finger hooking member 40, a switch part 43 performing switching motion by being pressed by the second stem 42 and a holding part 44 providing this switch part 43 and holding the finger hooking member 40. On the recessed part of a switch main body 53, the first contact 55, the second contact 56 being apart from the first contact 55 and an elastic contact 57 connecting electrically the second contact 56 with the first contact 55 are provided. In addition, the elastic contact 57, the second stem 42 and the first stem 41 are always placed under a condition wherein they are brought into contact with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push button device provided in an operation section of an endoscope.

[0002]

2. Description of the Related Art In recent years, by inserting an elongated insertion portion into a body cavity, the inside of the body cavity and the bore of a boiler, a turbine, an engine, a chemical plant, etc. are observed, and a treatment tool is used as necessary. Endoscope devices capable of performing simple and easy procedures are widely used.

Generally, the operation section of these endoscope apparatuses is
Peripheral devices such as an angle knob for performing bending operation of a bending portion provided in an elongated insertion portion that is inserted into a body cavity or the like, a camera connected to an endoscope device, and an air / water / gas feeding means. There are provided a plurality of push button devices that enable the operation of.

When the operator operates the operation section of such an endoscope apparatus, for example, the operator holds the operation section with the left hand and operates the plurality of push button devices with the finger of the left hand. , The right hand finger is used to operate the angle knob.

However, since there are individual differences in the size of the hand that operates the operation section, depending on the operator, the fingers may not reach all the push button devices and the position of the hand that holds the operation section may vary. It may be difficult to operate the push button accurately. If the push button operation cannot be performed accurately, and if the push button device is configured to operate only when it is pressed in the vertical direction, an accurate push button operation is performed each time the push button device is pressed. Since it is necessary to change the operation unit to perform the operation, not only the operability is deteriorated, but also the work efficiency is lowered, and in the medical endoscope apparatus, the pain of the subject may be increased.

[0006] Therefore, the applicant of the present invention, the actual Kaihei 2-1350
No. 02 publication proposes a push-button device for an endoscope that performs a switching operation regardless of whether it is pressed from any of the upward, lateral, and diagonal directions. As shown in FIG. 7A, the push-button device 1 for an endoscope is provided inside the exterior plate 2 a that forms the outer shape of the operation unit 2.
While the holding member 4 having the switch portion 3 is arranged, on the opposite side of the holding member 4 that sandwiches the exterior plate 2a, a finger hooking member 5 formed of, for example, silicone rubber is provided from the side of the operation portion 2. It is protruding.

The switch section 3 has a first contact 6 and a second contact 7 provided apart from the first contact 6.
And an elastic contact 8 having elasticity for electrically connecting the first contact 6 and the second contact 7,
The elastic contact 8 is electrically connected to the second contact 7 and is formed in a diaphragm shape to cover the first contact 6.

The elastic contact 8 is provided on the finger hook member 5
The first contact 6 is deformed by being pressed by the stem 9 that transmits the pressing force of
The contact 6 and the second contact 7 are electrically connected. Further, the elastic contact 8 is arranged so as to always come into contact with the lower end portion of the stem 9, so that the stem 9 can be pushed even when the finger hook member 5 is pressed from any of the upward, lateral, and oblique directions. Elastic contact 8 corresponding to the displacement of
Can be deformed to contact the first contact 6.

That is, the push button device 1 is shown in FIG.
In order to ensure that the lower end of the stem 9 is displaced when the finger hanging member 5 is pressed from any direction such as upward, lateral, or diagonal as shown in FIG.
While the engaged portion 10 is provided on the upper end portion of the stem 9 and the flat surface portion is provided on the upper end surface shown in (a), a pressing portion 11 for pressing the upper end surface of the stem 9 is provided on the inner surface of the finger hook member 5. An operating member 13 having an engaging portion 12 surrounding the stem 9 and the pressing portion 11 is provided. Since the elastic contact 8 always urges the stem 9 to the side opposite to the first contact 6 by the elastic force of the elastic contact 8, the flange portion provided at the lower end of the stem 9 14 is locked to the switch cover 16. Further, at this time, the stem 9 is biased to the side opposite to the first contact 6 so that the elastic contact 8 and the first contact 6 are not electrically connected.

The push button device 1 configured as described above
When the finger hooking member 5 is vertically pressed, the pressing portion 11 of the finger hooking member 5 displaces the stem 9 in the vertical direction (arrow A) as shown in FIG. Is also pressed vertically to electrically connect the first contact 6 and the second contact 7.

Further, when a pressing force from the lateral direction acts on the finger hook member 5, the engaging portion 1 of the operating member 13 is pressed.
2, the engaged portion 10 of the stem 9 is engaged,
By moving in the lateral direction (arrow B) as shown in FIG. 7C, the lower end of the stem 9 formed in a curved shape with the contact portion between the flange 14 of the stem 9 and the switch cover 16 as a fulcrum. By displacing the portion, the elastic contact 8 is deformed in an oblique direction, thereby
The contact point 6 and the second contact point are electrically connected. Further, the pressing force from the oblique direction is applied to the finger hook member 5.
The same operation as when the above-mentioned lateral pressing force is applied is also applied to.

[0012]

However, in the push button device having such a structure, since the elastic contact is originally configured to be pressed in the vertical direction with respect to the stem,
When the elastic contacts are pressed only from the vertical direction, they have sufficient resistance, but they do not have sufficient resistance to the force from the lateral direction or the oblique direction. Therefore, when a force is applied repeatedly from the lateral direction or the diagonal direction to the elastic contact, a plastic deformation or the like may occur, and the elastic force of the elastic contact may be attenuated so that the original function of the switch cannot be achieved.

The present invention has been made in view of the above circumstances, and presses the elastic contacts not only when the finger-hanging member is operated not only in the vertical direction but also in the lateral direction or the oblique direction. It is an object of the present invention to provide a push button device for an endoscope in which a stem vertically presses the elastic contact.

[0014]

A push-button device for an endoscope according to the present invention is an push-button device for an endoscope that can be pushed in any of upward, lateral, and oblique directions, and has elasticity provided in an operating portion. A finger hook member, a first stem that is displaced in response to a pressing force applied to the finger hook member, and a second stem that is in contact with the first stem and that slides due to the displacement of the first stem A substrate receiving member having a sliding surface for sliding the second stem vertically to the elastic contact,
A switch unit is provided, which abuts on the second stem and performs a switching operation by vertically pressing the elastic contact corresponding to the displacement of the second stem.

[0015]

With this structure, no matter whether the finger-hanging member is pressed from above, sideways or diagonally, the first stem is displaced by the pressing force acting on the finger-hanging member, and the first stem is displaced.
The displacement of the stem is transmitted to the second stem. And
The second stem is vertically displaced with respect to the elastic contact provided in the switch part to vertically press and deform the elastic contact, whereby the switch part performs a switching operation.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. 1 and 2 relate to a first embodiment of the present invention,
FIG. 1 is a sectional view showing a schematic structure of a push button device, and FIG. 2 is an explanatory view showing a schematic structure of an endoscope device.

The endoscope 21 as shown in FIG.
An elongated and flexible insertion portion 22 that can be inserted into a body cavity or the like, and a grip portion 2 on the proximal end side of the insertion portion 22.
An operation portion 24 having a large diameter is provided. The insertion portion 22 includes a flexible portion 25, a bending portion 26, and a tip portion 27, and a universal cord 28 extends from the side of the operation portion 24. A connector 29 is provided at the tip of the universal cord 28, and a light source device (not shown) is connected via the connector 29. Illumination light generated by the light source device is adapted to irradiate an observation site through a light guide 30 which passes through the universal cord 28 and extends to the distal end portion 27 of the insertion portion 22. .. Further, a solid-state image pickup device 31 is arranged on the tip portion 27, and while the observed region irradiated through the light guide 30 is converted into an electric signal by the solid-state image pickup device 31, this electric signal is converted into an electric signal. The signal is transmitted to a video processor (not shown) via a plurality of signal lines 32 connected to the solid-state image pickup device 31, and the observed portion is displayed on a monitor screen. The operation unit 24
Includes an angle knob 3 for bending the bending portion 26.
3, the switch box 34 is provided with an air / water supply switch 35, a suction switch 36, or an operation switch 37 for operating a screen displayed on the monitor screen.
And so on.

As shown in FIG. 1, for example, the operation switch 37 as a push button device acts on the finger hooking member 40 which is provided so as to project to the side of the operation section 24 and which is pressed by the operator. The first stem 41 and the second stem 42 for transmitting the pressing force, and the second stem 4
It is formed by a switch portion 43 that performs a switching operation by being pressed by 2, and a holding portion 44 that disposes the switch portion 43 and that holds the finger hanging member 40.

The finger hooking member 40 is formed in a tubular shape with one end closed by, for example, elastic silicon rubber, and the opening side end formed in the tubular shape is made of a hard material such as metal. An insert 45 formed by providing a plurality of female screw portions on the inner peripheral portion is provided. In addition, at the center upper part of the inner surface of the finger hanging member 40, the finger hanging member 4 is provided.
A pressing portion 46 and a hooking member 47 for transmitting the pressing force acting on 0 to the first stem 41 are provided.

The pressing portion 46 is for transmitting the pressing force to the first stem 41 when the pressing force from above is applied to the finger hanging member 40, and a flat surface portion is formed on the lower end surface thereof. It is formed by a cylindrical convex portion having. Also,
The hooking member 47 is for transmitting the pressing force to the first stem 41 when a pressing force is applied to the finger hanging member 40 from the lateral or diagonal direction, and will be described later. 1 has an engaging portion 47a for engaging the engaged portion 41a provided on the first stem 41, while surrounding the lower portion of the pressing portion 46 and the engaged portion 41a of the first stem 41. It is set up.

Next, the first stem 41, to which the pressing force when the finger hooking member 40 is operated, is transmitted, is formed in a substantially cylindrical shape having step portions at both ends. The upper end portion of the first stem 41 forms a flat upper end surface that abuts the pressing portion 46 of the finger hook member 40, while the upper end side surface is engaged with the engaging portion 47a of the hook member 47. The stepped portion serving as the engaged portion 41a is provided. Also,
A step portion 41b formed by bending the lower end surface is provided at the lower end portion.

Further, the second stem 42, which presses the switch portion 43 described later by transmitting the pressing force transmitted to the first stem 41, has a cylindrical portion which serves as a sliding portion and a flange portion 42a. And formed by the second
The upper end surface of the first stem 41 is formed flat so that the curved upper end surface of the first stem 41 abuts the upper end surface of the first stem 41, while the lower end surface has a substantially spherical shape for pressing the switch portion 43. The convex portion 42b is provided.

Finally, the holding portion 4 having the switch portion 43
Reference numeral 4 denotes a board 50 on which the switch section 43 is disposed, a board receiving section 51 formed in a substantially convex shape, the board receiving section 51 and the board 50 are fixed in parallel, and the switch 43 section is provided. It is composed of a spacer 52 that forms a space to be arranged.

The base 50 is provided with a switch body 53 which constitutes the switch portion 43 and a switch cover 54 which is fitted on the switch body 53. In the recess provided in the switch body 53, a first contact 55, a second contact 56 provided apart from the first contact 55, and a second contact 56.
And the elastic contact 5 for electrically connecting the first contact 55 with the first contact 55.
7 is provided, and the elastic contact 57 is electrically connected to the second contact 56 and the first contact 55.
It is formed in a diaphragm shape that covers the. Further, the second stem 42 is provided on the upper end surface of the switch cover 54.
Is provided with a through hole, and an eaves portion for locking the flange portion 42a of the second stem 42 is provided.

On the other hand, the base receiving member 51 formed in a substantially convex shape is transparent at a position corresponding to the female screw portion provided in the insert 45 arranged at the opening side end of the finger hanging member 40. The first stem 41 and the recess having a hole into which the sliding portion of the second stem 42 is fitted.
A through hole for inserting the through hole and an eave portion for locking the stepped portion 41b of the first stem 41 are provided.

That is, in the operation switch 37, first, the female screw portion provided on the finger-holding member 40 that is operated by the push button and the through hole of the substrate receiving member 51 are aligned and screwed by the connecting member 58. Operating part exterior plate 24a
Fixed to. Then, the first stem 41 is inserted into the through hole of the board receiving member 51, and the sliding portion of the second stem 42 arranged on the switch body 53 of the board 50 is inserted into the recess of the board receiving member 51. The board 50 and the board receiving member 51 are connected and fixed to each other through the spacer 52 by inserting the board 50 and a connecting member (not shown). At this time, the elastic contact 57 and the lower end surface of the second stem 42 come into contact with each other by the flange portion 42a of the second stem 42 being locked and positioned by the eaves portion of the switch cover 54. And the upper end surface of the second stem 42 and the lower end surface of the first stem 41 are
The stepped portion 41b of the first stem 41 is connected to the base receiving member 51.
It is arranged so as to come into contact with each other by being locked and positioned by the eaves portion. Thus, the elastic contact 57, the second stem 42, and the first stem 4
1 is arranged so as to be always in contact with each other.

The elastic contacts 57 are moved from the first contacts 55 to the elastic contacts 57 by the elastic force of the elastic contacts 57 when not pressed by the second stem 42.
Are separated from each other and are not electrically connected.

Further, since the hook member 47 is formed so that the lower end surface of the hook member 47 comes into contact with the upper end surface of the insert when the hook member 47 moves in the direction of the switch portion 43, the pressing portion is formed. 46 presses the upper end surface of the first stem 41 to electrically connect the switch portion 43,
Even if an attempt is made to press the upper part of the finger hook member 40, the lower end surface of the hook member 47 contacts the upper end surface of the insert, so that the first stem 41 and the second stem 4
2 is prevented from moving downward.

Further, the gap formed between the upper end surface of the first stem 41 and the lower end surface of the pressing portion 46 is formed between the lower end surface of the hook member 47 and the upper end surface of the insert. The gap formed between the lower end surface of the hook member 47 and the upper end surface of the insert is very small when the switch portion 43 is operated in the ON state by forming the gap smaller than the gap. It is set not to be performed.

The operation of the operation switch 37 configured as described above will be described. When the finger hook member 40 is vertically pressed, the operation switch 37 causes the side wall of the finger hook member 40 to buckle, the pressing portion 46 to move downward, and the upper end surface of the first stem 41 to be pressed. Displace vertically. On the other hand, the second stem that is in contact with the lower end surface of the first stem presses the second stem vertically as the first stem 41 is displaced. The lower end surface of the second stem 42 provided therein is also vertically displaced against the elastic force of the elastic contact 57 to deform the elastic contact 57, thereby deforming the first contact 5
The switch part 43 is turned on by contacting the switch 5.

Next, in the operation switch 37, when the finger hanging member 40 is laterally pressed, the upper end portion of the finger hanging member 40 moves substantially in parallel, so that the pressing portion 46 and the first stem. The engaging portion 47a of the hooking member 47 that is disposed surrounding the first stem 41
The first engaged portion 41a is engaged to bias the first stem 41 to incline it. The step portion 41 of the first stem 41 is tilted by tilting the first stem.
The second stem 42 also starts to be displaced by the curved lower end surface of the first stem 41 by being rotated about the contact portion between the b and the eaves. At this time, since the second stem 42 is displaced by sliding on the sliding surface of the concave portion provided in the substrate receiving member 51, the lower end surface of the second stem 42 is also elastic by the elastic contact 57. By vertically displacing against the force and deforming the elastic contact 57, the elastic contact 57 comes into contact with the first contact 55 and the switch portion 43 is turned on.

As described above, the same applies not only when the finger-hooking member 40 is pressed from the side but also when it is pressed obliquely, and from which direction in the entire circumferential direction of the operation switch 37 the finger-hooking member 40 is pressed. Even when a pressing force is applied to the second stem 42, the second stem 42 slides and displaces on the sliding surface of the recess provided in the substrate receiving member 51, so that the elastic contact is always in the vertical direction. Can be pressed.

In this embodiment, the finger hook member 40 is made of silicone rubber, but the finger hook member 40 is made of, for example, hard plastic.
It may be configured to be arranged on the exterior plate 24a of the operation unit 24 via a member having elasticity.

In this embodiment, the push button device is used for the operation switch 37. However, the push button device can be used for other switches.

Further, in the present embodiment, the switch section 43 is arranged inside the operation section 24, and the first stem 41 and the second stem 42 are arranged from the inside of the operation section 24.
However, the present invention is not limited to this example. By providing the switch portion 43 on the outside of the exterior plate 24a, the first stem 41 is provided.
It is also possible to dispose the second stem 42 only outside the operating portion 24.

Furthermore, the portion where the outer periphery of the finger hooking member 40 is provided inside the exterior plate 24a is the finger hooking member 4
0 is provided with a protrusion 40a, and the protrusion 40a
By fitting a into the recess 24b formed on the inner periphery of the exterior plate 24a, the finger hooking member 40 and the exterior plate 24a are formed.
The liquid-tightness between and is secured. Therefore, the endoscope 21
Even if a process such as cleaning or disinfecting is performed on, the liquid such as the cleaning liquid or the disinfecting liquid does not enter the operation unit 24 through the space between the finger hanging member 40 and the wall of the exterior plate 24a.

By the way, the endoscope device 21 is used for sterilization by immersing it in a chemical solution or the like in order to avoid infectious diseases caused by various bacteria adhering to the endoscope after using the endoscope. It has a waterproof structure. However, inside the endoscope, when the endoscope is immersed in water or a chemical solution to increase the humidity, a solid-state image pickup device 31 such as a CCD disposed inside the endoscope, an electric component, or the like is provided. There is a possibility that a defect may occur or the light guide fiber 30 may be broken easily. Therefore, it is necessary to prevent the humidity inside the endoscope from rising and to dry the solid-state imaging device 31, the electric components, and the light guide fiber 30 in a short time.

The method for removing moisture in the endoscope device 21 can be as follows. Figure 2
As shown in, the adapter mounting port 71 communicating with the inside of the endoscope
Is provided on the distal end side of the operation portion 24, and a dry air supply device 72 is connected to the adapter attachment port 71 to feed dry air into the endoscope, while, for example, an electrical connector attached away from the adapter attachment port 71. A suction device 74 for promoting diffusion and circulation of the dry air in the endoscope at the mouth 73.
Are connected.

With the above construction, the dry air sent into the endoscope can diffuse and circulate inside the endoscope by the operation of the suction device 74 to take in moisture. Therefore, the inside of the endoscope can be quickly dried.

In FIG. 4, the endoscope tip portion 27 is connected to the light source device 75 so that the heat source of the light source device 75 is used to evaporate and remove the moisture inside the endoscope. Is.

As shown in the drawing, an adapter 77 for connecting a light source device is connected to the endoscope distal end portion 27 in which the objective unit 76 and the solid-state image pickup device 31 are arranged. A recess 78 for fitting and fixing the adapter 77 is formed in the light source device 75. The adapter 77 includes a leaf spring 79 for attaching to the distal end portion 27 of the endoscope, and the adapter 77 can be securely fixed when the adapter 77 is inserted into the recess 78 of the light source device 75. An elastic O-ring 80 is disposed on the outer periphery of the. Further, in the light source device 75, the optical path of the light source device 75 and the axis of the objective unit 76 at the tip of the endoscope are made to coincide with each other, and the endoscope tip portion 27 is easily connected to the light source device 75. An air supply path 81 which also serves as a guide hole is provided so as to enable positioning. A guide rod 82a provided so as to project into a forceps channel 82 or the like provided in the endoscope distal end portion 27 can be inserted into the air supply path 81. By inserting 82a into the air supply passage 81, the distal end portion 27 of the endoscope can be easily connected to the light source device 75.

As described above, the moisture remaining in the endoscope connects the endoscope distal end portion 27 to the light source device 75 via the adapter 77 and turns on the light source of the light source device 75. The heat generated by the light source device 75 is conducted to the objective unit 76 and the solid-state image pickup device 31 to be evaporated and removed. Further, since the user can easily mount the tip end portion 27 of the endoscope on the light source device 75, it is possible for the user to dehumidify the solid-state image sensor or the like disposed at the tip portion of the endoscope. Since it can be performed frequently, the life of the solid-state image pickup device can be extended. .

Further, as shown in FIG. 5, dry air is circulated inside the endoscope as described above, or the distal end portion 27 of the endoscope is used.
In order to further reduce the work time of connecting the light source device 75 to the light source device 75 and dehumidifying the light source device 75, for example, a forceps insertion channel constituted by the endoscope tip body 27a, the forceps insertion connection pipe 83 and the forceps insertion tube 84 Reference numeral 82 denotes a forceps insertion tube 84 made of a PTFE member, and a forceps insertion through hole and a forceps connection pipe 8 in the endoscope distal end body.
The inner surface of 3 as well as the entire inner peripheral surface of each connection portion is coated with a water repellent material such as PTFE.

With this structure, body fluid or the like is less likely to adhere to the forceps insertion channel 82, and the inside of the forceps insertion channel 82 can be easily washed. In addition, the forceps insertion channel 8
Since the amount of the cleaning liquid for cleaning the inside of 2 also remains on the inner surface of the channel, the dehumidifying time is shortened. The present embodiment is not limited to the forceps insertion channel 82, but is applied to all conduits such as an air supply conduit and a water supply conduit not shown.

Next, a second embodiment will be described with reference to FIG. FIG. 3 is a schematic cross-sectional view of the configuration according to the second embodiment of the present invention. The same members as those in the first embodiment and members having the same functions as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In this embodiment, the flange portion 42a of the second stem 42 used in the first embodiment is deleted, and the second stem 42 is brought into contact with the elastic contact 57 without using the switch cover 54. It is possible to arrange.

That is, the length of the recess of the board receiving member 51 used in the first embodiment can be made longer by increasing the thickness of the flange of the board receiving member 51. Since the recess of the base receiving member 51 is elongated, the step portion of the second stem 41 and the sliding portion of the second stem 42 are internally provided in the recess to form the operation switch 37. The rest of the configuration is the same as in the first embodiment.

With the above-described structure, the fitting length between the second stem 42 and the recess of the base plate receiving member 51 is increased, so that the sliding performance of the second stem in the vertical direction is improved. .. Further, since the switch cover 54 is not required, it is possible to reduce the number of parts, so that the switch portion 43 can be made compact. Other functions and effects are similar to those of the first embodiment.

[0049]

As described above, in the push button device for an endoscope according to the present invention, when the finger hook member is operated not only in the vertical direction but also in the lateral direction or the oblique direction, The second stem has the effect of vertically pressing the elastic contact.

[Brief description of drawings]

1 and 2 relate to a first embodiment of the present invention, and FIG. 1 is a sectional view showing a schematic configuration of a push button device.

FIG. 2 is an explanatory diagram showing a schematic configuration of an endoscope apparatus.

FIG. 3 is a cross-sectional view showing a schematic configuration of a push button device according to a second embodiment.

FIG. 4 is an explanatory cross-sectional view showing a connection between a distal end portion of an endoscope and a light source device.

FIG. 5 is an explanatory sectional view showing the internal structure of the forceps insertion channel.

6 and 7 relate to a conventional example of the present invention, and (a) and (b) of FIG. 6 are explanatory views for explaining a pressing direction of a push button device.

FIG. 7A is a cross-sectional view showing a schematic configuration of a push button device. FIG. 7B is an explanatory view showing the action of the elastic contact when the stem is pressed from above. Explanatory diagram showing the action of the elastic contact

[Explanation of symbols]

 23 ... Gripping part 24 ... Operating part 37 ... Finger hanging member 41 ... First stem 42 ... Second stem 43 ... Switch part 51 ... Board receiving member 55 ... First contact point 56 ... Second contact point 57 ... Elastic contact point

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[Procedure amendment]

[Submission date] June 17, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0041

[Correction method] Change

[Correction content]

As shown in the drawing, an adapter 77 for connecting a light source device is connected to the endoscope distal end portion 27 in which the objective unit 76 and the solid-state image pickup device 31 are arranged. A recess 78 for fitting and fixing the adapter 77 is formed in the light source device 75. The adapter 77 includes a leaf spring 79 for attaching to the distal end portion 27 of the endoscope, and the adapter 77 can be securely fixed when the adapter 77 is inserted into the recess 78 of the light source device 75. An elastic O-ring 80 is disposed on the outer periphery of the. Further, in the light source device 75, the optical path of the light source device 75 and the axis of the objective unit 76 at the tip of the endoscope are made to coincide with each other, and the endoscope tip portion 27 is easily connected to the light source device 75. gas feed path 81 is provided which also serves as a positioning guide hole for enabling. A guide rod 82a provided so as to project into a forceps channel 82 or the like provided in the endoscope distal end portion 27 can be inserted into the air supply path 81. By inserting 82a into the air supply passage 81, the distal end portion 27 of the endoscope can be easily connected to the light source device 75.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] Explanation of code

[Correction method] Change

[Correction content]

[Explanation of Codes] 23 ... Gripping Part 24 ... Operation Part 40 ... Finger Hooking Member 41 ... First Stem 42 ... Second Stem 43 ... Switch Part 51 ... Board Receiving Member 55 ... First Contact Point 56 ... Second Contact Point 57 ... Elastic contact

Claims (1)

[Claims] 1. A push button device for an endoscope, which can be pressed from any of upward, lateral, and diagonal directions, wherein an elastic finger hook member is provided on an operation portion that also functions as a grip portion on the proximal side of the endoscope, A first stem that is displaced in response to the pressing force applied to the finger-hanging member; a second stem that is in contact with the first stem and that slides due to the displacement of the first stem; And a substrate receiving member having a sliding surface for vertically sliding the stem of the elastic contact to the elastic contact, and the elastic contact vertically presses against the displacement of the second stem while abutting against the second stem. A push button device for an endoscope, comprising: a switch section that performs a switching operation by doing so.