JP2003135395A - Endoscope system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an endoscope system wherein an expensive endoscope body side is prevented from being damaged even when an excessive impulse is applied from the restricted location for the turning operation wherein a relative location between a light source unit and an operating unit of the endoscope is changed. SOLUTION: This endoscope system is equipped with a rotation-restricting section 34e. In this case, the rotation-restricting section 34e restricts a relative turning final end location to the operating unit 6 of a battery type light source 4 when abutting against a tongue piece 27a which is positioned by the operating unit 6 of the endoscope body, when the battery type light source 4 is connected with the operating unit 6 of the endoscope body. Then, the mechanical strength of a member which forms at least one of the tongue piece 27a and the rotation- restricting section 34e is made smaller than the connecting strength to connect the battery type light source 4 with the operating unit 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope device suitable for portable use.

[0002]

2. Description of the Related Art Endoscopes have come to be widely used in various fields such as medical care and industry. Particularly, since the site to be diagnosed or inspected is inside a living body or a plant, a means for illuminating the inside thereof. Was needed.

In a general endoscope, a light source device is prepared as an external device separate from the endoscope, and light emitted from a lamp in the light source device is guided to a light guide fiber provided in the endoscope. I have to. The illumination light guided to the light guide fiber is emitted from the illumination window on the distal end side of the insertion portion and illuminates the inspection site. This type of endoscope light source device uses a power source supplied from a commercial power source to cause a light source lamp to emit light.

On the other hand, in the prior art, for example, Japanese Unexamined Patent Publication No. 20
Japanese Patent Publication No. 01-157368 discloses an endoscope apparatus in which a battery-type light source using a dry battery as a power source is detachably attached to an endoscope operation section. An endoscope to which such a battery-type light source is attached is easy to carry and can be used in a place without a power source, so it is optimal for emergency use.

To turn on and off the lamp provided in the battery type light source, after the connection part of the battery type light source is integrally attached to the endoscope operation part, the battery type light source body is attached to the endoscope. This is performed by rotating the operation unit so that it can be seen from the appearance whether or not the lamp is in the ON state. Then, the ON and OFF
The switch positions of (1) and (2) are defined as the regulating positions on one side and the other side of the range in which the relative position changes during the rotating operation.

[0006]

However, in the endoscope apparatus disclosed in Japanese Patent Laid-Open No. 2001-157368, the rotation restriction strength at the connecting portion between the battery type light source and the endoscope operation section, and the inside of the battery type light source. Since no special consideration was given to the interrelationship with the strength of the switch rotation restricting part, when the connection strength between the battery-type light source and the endoscope operating part is less than or equal to the switch rotation restricting strength, the switch is operated when the switch is operated. If excessive torque is applied, the battery-type light source connection part of the endoscope operation part may be destroyed.

In particular, in view of improving the performance of the battery type light source, the battery type is increased by enlarging the battery to be combined to increase the energy capacity, or by incorporating an additional function such as a battery remaining amount display circuit as in the prior art. When the size of the light source body is increased, an excessive torque is likely to be applied when the switch is operated, and thus the probability of occurrence of the above problem is high.

The present invention has been made in view of the above circumstances, and when an excessively large amount of force is applied from the restricted position of the rotation operation in which the relative position between the light source unit and the operation portion of the endoscope changes. However, it is an object of the present invention to provide an endoscope device in which the expensive endoscope body side is not destroyed.

[0009]

The invention according to claim 1 is
An endoscope body in which an incident end portion of a light guide that guides illumination light for illuminating an object is arranged in an operation portion, and an operation portion of the endoscope body is configured to be connectable, and the illumination light is emitted to the light guide. A light source unit including a light source to be supplied, a connecting portion that connects the light source unit to an operating portion of the endoscope body, and a connecting portion that is provided in the connecting portion, Rotation guide means for supporting the light source unit so that the endoscope body is rotated, and the endoscope main body when the light source unit is connected to the operation portion of the endoscope main body, which is provided in the connection portion. Of the light source unit, which is provided on the light source unit side, is rotated relative to the operation unit of the endoscope body, and abuts on the stopper unit. Rotation relative to the operating part A rotation restricting portion for restricting an end position, wherein a mechanical strength of a member forming at least one of the stopper portion and the rotation restricting portion is smaller than a connecting strength of the connecting portion. It is an endoscope device that does.

According to a second aspect of the present invention, there is provided a light source switch for switching ON / OFF of the light source by rotating the light source unit relative to an operation portion of the endoscope body. The endoscope apparatus according to claim 1.

The invention according to claim 3 is characterized in that a plurality of rotation restricting portions are arranged in the light source unit in a relative rotating direction of the light source unit and the operating portion. Item 2. The endoscope apparatus according to item 2.

With these configurations, even if the light source unit is rotated or the switch is switched with an excessive amount of force, the endoscope body is not damaged and can be replaced at a lower cost than the endoscope body. Since the battery-type light source is broken first, the damage can be minimized.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment] (Structure) FIGS. 1 to 11 are views relating to a first embodiment of the present invention. FIG. 1 is a perspective view showing the entire endoscope apparatus according to the present embodiment. 2 is a vertical cross-sectional view of the battery-type light source probe, FIG. 3 is an explanatory view showing the appearance of the operation portion of the endoscope and the connection portion of the battery-type light source, FIG. 4 is a perspective view showing the whole of the battery-type light source, and FIG. FIG. 7 is a longitudinal cross-sectional view of a portion of the battery-type light source mainly in the lamp chamber, and FIG. 6 is an explanatory view of a switch operation of the battery-type light source due to a difference in relative position between the operation section of the endoscope and the battery-type light source. Is an explanatory view showing a switch position in a switch off state, FIG. 8 is an explanatory view showing a switch position in a switch on state, FIG. 9 is an explanatory view showing another switch position in an on state, and FIG. 10 is a battery type FIG. 11 is an explanatory diagram showing the configuration of the power supply circuit of the light source. It is a disassembled perspective view of the components which comprise the click mechanism of an switch.

As shown in FIG. 1, an endoscope apparatus 1 includes an endoscope 2 having a watertight structure, a light guide cable 3 which is detachably connected to the endoscope 2, and an endoscope 2 which is attachable to and detachable from the endoscope 2. Watertight battery-type light source (light source unit) that can be freely connected
4 is provided.

The endoscope 2 is composed of an elongated insertion portion 5, an operation portion 6 provided at the base end of the insertion portion 5, and an eyepiece portion 7 provided at the rear end portion of the operation portion 6. ing. The insertion part 5
Is composed of a rigid tip portion 8, a bendable bending portion 9, and a flexible tube portion 10 which are arranged in this order from the tip end side.

A light guide base 11 formed of a member having good thermal conductivity is provided on the side surface of the operating portion 6 so as to project laterally. The connection portion 3a of the light guide cable 3 is detachably connected to the light guide base 11, or the connection portion 12 of the battery type light source 4 is detachably connected.

The operating portion 6 has a grip portion 1 which is grasped by an operator.
3 is provided. On the rear side of the grip portion 13, the light guide base 11, a bending operation lever 14 for performing a bending operation of the bending portion 9, and a suction button 1 for performing a suction operation.
5 are provided. Near the proximal end of the suction button 15, a suction mouthpiece 16 that passes through the inside of the insertion portion 5 from the operation portion 6 and communicates with a suction channel (not shown) opened in the tip portion 8 of the insertion portion 5 projects.

The suction cap 16 is connected to a suction device (not shown) via a tube (not shown), and the suction button 15 can be appropriately operated while the suction device is connected to the suction cap 16. Thus, the liquid and the like in the body cavity can be sucked and discharged through the suction channel (not shown) and the suction mouthpiece 16.

A forceps insertion port 17 communicating with the suction channel is provided on the front side of the grip portion 13 so as to project obliquely. Normally, a forceps plug (not shown) is attached to the forceps insertion port 17, and the forceps insertion port 17 is closed by the forceps plug. Also, the forceps insertion opening 1
A vent hole 19 is provided at a portion of the grip portion 13 located on the opposite side of 7, and the endoscope 2 immersed in water by sending air from the vent hole 19 into the endoscope 2 A water leak test of the endoscope 2 can be performed depending on the presence or absence of the generated bubbles.

Illumination light is guided (transmitted) into the insertion portion 5.
A light guide fiber (not shown) is inserted. The light guide fiber is bent inside the operation portion 6, and the base end portion (rear end) of the light guide fiber is fixed inside the light guide base 11, so that the incident end surface of the light guide fiber is guided. It is arranged on the base 11. On the other hand, the tip of the light guide fiber is fixed to the illumination window 20 provided in the tip portion 8 of the insertion portion 5.

As shown in FIG. 3, a connection cylinder 51 is provided on the outer peripheral portion of the light guide base 11, and the connection cylinder 5 is provided.
A male screw portion 51a for connection is provided on the outer peripheral surface of 1. The male screw portion 51a includes a connecting ring 3 rotatably provided on the outer peripheral side of the connecting portion 3a of the light guide cable 3 or the connecting portion 12 of the battery type light source 4.
The female screw portions formed on the inner peripheral surfaces of c and 24 are screwed together, and the endoscope 2 and the light guide cable 3 or the endoscope 2
And the battery type light source 4 are integrally connected.

As shown in FIGS. 3 to 5, the connection ring 24 of the battery type light source 4 has a screw body 24a formed with the female screw portion, and low heat such as rubber covering the outer periphery of the screw body 24a. The screw cover 24b is made of a transmissive and elastic material. The end portion of the screw cover 24b on the front end side extends and projects toward the front end side from the front end of the screw body 24a.
A convex portion 24c is integrally formed on the inner peripheral surface of b.

When connecting the endoscope 2 and the battery type light source 4, as shown in FIG. 3, an index 49 provided on the connecting cylinder 51 of the light guide base 11.
Then, the battery type light source 4 is attached to the light guide base 11 such that the indicator 4a provided on the battery type light source 4 is aligned with the index. By the positioning by the index, the positioning pin 26 provided on the battery-type light source 4 is engaged with the pin receiving portion 25 provided on the connection cylinder 51 of the light guide base 11, and the position is constant with the light guide base 11. The connection portion 12 of the battery-type light source 4 is positioned in relation to this.

In this positioning state, the connection ring 24 is rotated in a predetermined direction so that the female screw 24d formed on the inner peripheral surface of the screw body 24a and the male screw portion 51a of the connection cylinder 51 are screwed together. By this fixing, the endoscope 2 and the battery-type light source 4 are integrally connected, and the watertight ring 28 provided on the connection mouthpiece 27 made of a rigid body such as metal on the inner peripheral side of the connection ring 24 is provided inside the connection tube 51. The watertightness is secured in the connecting portion by closely contacting with the peripheral surface.

Incidentally, the positioning pin 26 and the connecting cylinder 5
Since 1 is made of a rigid body such as metal, the positioning pin 26 is integrally fixed to the connection mouthpiece 27, and the connection cylinder 51 is integrally fixed to a metal member forming the inside of the operation portion 6, Regulation of the rotation direction at the connecting portion between the endoscope 2 and the battery-type light source 4 becomes strong. At this time, the strength against the rotation direction in the connected state has a fixed strength with a sufficient margin for the torque applied when actual use such as switch operation described later is assumed,
Set the material and thickness of each part.

When the connection ring 24 and the connection cylinder 51 are screwed together, the protrusion 24c formed on the inner peripheral surface of the screw cover 24b is provided on the base 6c of the base 6c projecting from the side surface of the operation portion 6. Abuts the outer peripheral surface with elastic force. As a result, the screwed and fixed state of the connecting ring 24 and the connecting cylinder 51 is not easily loosened.

Further, during the screwing and fixing work, the battery type light source 4 is turned off so that the illumination lamp 21 does not light up. Here, the positional relationship shown by the alternate long and short dash line in FIG.
That is, the light source body 30 of the battery-type light source 4 is placed in a position parallel to the longitudinal axis direction of the endoscope 2. If the light source body 30 is placed at any position shown by the solid line or the broken line in FIG. 6 by rotating 90 ° in the forward or reverse direction with reference to the OFF state, the lighting lamp 21 is turned ON.
It comes to be in a state.

Therefore, for example, the battery type light source 4 is mounted on the light guide base 11, and the light source main body 30 is arranged at the position shown by the solid line or the broken line in FIG. The provided illumination lamp 21 emits light. Then, the illumination light of the illumination lamp 21 is condensed by the condenser lens 22 (see FIG. 5) in the battery-type light source 4.
And the endoscope 2 through a light guide cover (not shown) made of a transparent glass member provided on the light guide fiber light incident end surface of the light guide base 11.
The light guide fiber guides the light to the tip of the endoscope 2 and is emitted from the illumination window 20 of the tip 8 toward the front side to illuminate the examination site.

On the other hand, the light guide connector 3b provided at the rear end of the light guide cable 3 shown in FIG. 1 is connected to an existing light source device (not shown). Therefore, by connecting the light guide connector 3b to the light source device, the illumination light from the illumination lamp (not shown) provided inside the light source device is supplied to the light guide connector 3b.
b, it is supplied to the light guide fiber of the endoscope 2 via a light guide fiber (not shown) in the light guide cable 3 and the connecting portion 3a. By connecting the light guide cable 3 to the endoscope 2 in this manner, it is possible to perform an endoscopic examination by connecting to the light source device, as in the case of a normal endoscope.

Next, the connection ring 24 is connected to the connection cylinder 51 of the endoscope 2.
The configuration of the battery-type light source 4 that is detachably connected by means of will be specifically described.

As shown in FIG. 4, the battery type light source 4 includes a light source body 30, a lid 31 connected to the light source body 30 by a hinge, for example, so as to be openable and closable, and a light which can be mounted on the light source body 30. It is configured with a lamp holder 32 as a lamp mounting member that holds the lamp 21.

The dry battery 33 can be replaced by opening the lid 31, and the illumination lamp 21 can be replaced by removing the lamp holder 32 from the light source body 30. In this embodiment, two dry batteries 33 (for example, AA nickel-metal hydride rechargeable batteries) are used as the power source of the battery type light source 4.

The light source body 30 has an exterior member 34 formed of an electrically insulating resin member. The exterior member 3
4, a battery storage portion 35 for storing the dry battery 33 and a lamp chamber 36 for storing the illumination lamp 21 are formed.

A remaining amount detecting circuit 47 for detecting the remaining amount of the dry battery 33 to be used is provided inside the battery housing portion 35, and the detection result by the remaining amount detecting circuit 47 is operated by lighting a plurality of LEDs 29. The person is notified of the remaining amount of the dry battery 33. As shown in FIG. 3, a plurality of display windows 37 that transmit the light of the LED 29 are arranged at a position of the exterior member 34 that faces the LED 29, and the remaining amount display unit 3 is provided.
Make up eight. It should be noted that the display means by the LEDs 29 may be freely combined in terms of color, number and the like so that the operator can easily recognize them. Further, it may be displayed in the form of a bar graph by the liquid crystal.

Further, when the two dry batteries 33 are stored in the battery storage portion 35 and the lid 31 is closed, the dry batteries 33 are urged by the elastic force of the coil spring 44, which will be described later, and have a good conductivity. The conductive plate 41 formed in 1 is contacted and connected in series. Therefore, the directions when the two dry batteries 33 are loaded are different from each other.

As shown in FIG. 4, the lid 31 is provided with a fixed claw 31a. The exterior member 34 is provided with a lock claw 42 that engages with the fixed claw 31a when the lid 31 is closed. The lock claw 42 is rotatably provided on an opening lever 43 that rotates with respect to the exterior member 34. Therefore, the lock claw 42 is in a state of being fixed to the fixed claw 31a or in a state of being opened in association with the operation of the opening lever 43. That is, the lid 31
Is a so-called buckle type locking mechanism, and is a light source body 3
It is fixed integrally to 0.

A packing 46 is provided on the inner peripheral surface of the lid 31, and when the lid 31 is closed, the packing 46 comes into close contact with the opening of the battery housing 35 and the battery housing. Keep 35 watertight.

The two coil springs 44 made of a material having good conductivity are arranged at the bottom of the battery housing 35 and connected to the power supply circuit 45 (see FIG. 5), and the dry batteries 33 connected in series are connected to each other. The power is the power supply circuit 45.
Is supplied to. The power supply circuit 45 includes a transformer circuit 39 for converting the voltage of the dry battery 33 into the rated voltage of the illumination lamp 21.
Is installed.

Further, as shown in FIG.
A plurality of conductive contact plates 40a, 40b, 40c having elastic force are arranged in a region between the lamp chamber 36 and the lamp chamber 36.
These conductive contact plates 40a, 40b, 40c have their base end portions screwed and fixed to the exterior member 34 around the lamp chamber 36, and the other ends thereof project to the lamp chamber 36 side.

The protruding end portion of the conductive contact plate 40a is provided so as to be deformed within its elastic range by a switch operation described later and to get on and off the insulating block 52 provided outside the lamp housing cylinder 50. Figure 7 (b)
As shown in FIG. 5, the conductive contact plate 40a and the conductive contact plate 40b are separated when the insulating block 52 is mounted,
The switch is turned off. Further, as shown in FIGS. 8B and 9B, when the conductive contact plate 40a descends from the insulating block 52, the conductive contact plate 40a and the conductive contact plate 40b are in pressure contact with each other and the switch is in the ON state. become.

The conductive contact plate 40a slidingly contacting the insulating block 52 has a wide portion near the tip thereof so that the edge portion does not scrape the insulating block 52. Also,
The insulating block 52 is located near the center of the edge portion of the conductive contact plate 40a and has a sliding protrusion 52a. By providing the sliding convex portion 52a in this manner, the sliding convex portion 5 is provided at the central portion of the conductive contact plate 40a.
The contact of the contact 2a is prevented so as to prevent contact failure of the contact due to the generation of scraps. The wide tip of the conductive contact plate 40a is also a contact portion with the conductive contact plate 40b.

As the material of the insulating block 52, a material such as polyacetal resin having abrasion resistance and self-lubricating property is used so that the sliding surface is always kept smooth.

The conductive contact plate 40b is a lamp housing cylinder 50 made of a good conductive material regardless of the switch operation described later.
It is always pressed and in contact with the outer circumference of. The end of the conductive contact plate 40b, which is a contact portion with the lamp housing cylinder 50 and the conductive contact plate 40a, is formed wider than the conductive contact plate 40a. Further, as shown in FIG. 5, the ends of the conductive contact plates 40a and 40b are arranged at the same position where they can overlap each other, and the end of the conductive contact plate 40a is arranged outside the end of the conductive contact plate 40b. To be done.

When the switch operation is OFF, a part of the wide end of the conductive contact plate 40b goes under the insulating block 52, that is, in the gap provided between the outer periphery of the lamp housing cylinder 50. Fits, both conductive contact plate 40
a and 40b are separated from each other.

As shown in FIG. 5, the conductive contact plate 40c.
The projecting end portion is formed wide, and the bent portion 40d formed by bending the wide projecting end portion is arranged so as to enter the inside of the lamp chamber 36. The bent portion 40d of the conductive contact plate 40c is provided with a lamp contact spring 5 provided in the lamp holder 32 when the lamp holder 32 is mounted in the lamp chamber 36.
The ring-shaped portion 55a of No. 5 is pressed and contacted.

Further, the dry battery 33 in this embodiment is a nickel-hydrogen rechargeable battery and has an electromotive force of 1.2 V per unit cell. Therefore, as shown in FIG. 10, by connecting two dry batteries 33 in series, a power supply voltage of 2.4 V is obtained. The anode side of the dry battery 33 is connected to the transformer circuit 39, and the cathode side is connected to the conductive contact plate 40a.
The conductive contact plate 40b with which the conductive contact plate 40a contacts is connected to the transformer circuit 39, and a power supply circuit to the transformer circuit 39 is configured in a state where the conductive contact plate 40a and the conductive contact plate 40b are in contact with each other. In addition, the conductive contact plates 40b, 4
0c is electrically connected to the electrodes of the illumination lamp 21 (rated voltage 4.8V). Conductive contact plates 40b, 4
0c is an output line of the transformer circuit 39. With this circuit configuration, the transformer circuit 39 is activated by the switch operation of the conductive contact plate 40a, and the power boosted to 4.8V is supplied to the illumination lamp 21.

The conductive contact plate 40b is the dry battery 3
3, a common ground for the loop of the transformer circuit 39 and the loop of the transformer circuit 39 and the illumination lamp 21.

Although not shown, the power supply circuit 45 and the remaining amount detection circuit 47 are joined in an L shape, and the electromotive force of the remaining amount detection circuit 47 is supplied from the power supply circuit 45. .

On the other hand, as shown in FIG. 4, the lamp holder 3
Reference numeral 2 designates a holder main body 70 formed by providing a large diameter portion and a small diameter portion of an electrically insulating material such as a resin material, and the holder main body 7
No. 0 water-tight ring 56 arranged on the outer circumference of the large diameter portion, and ring-shaped portion 55 fitted and arranged on the small diameter portion of the holder main body 70.
a and the illumination lamp 2 from the ring-shaped portion 55a
Arm 55 that abuts the base end side electrode of 1 with spring elasticity
and a lamp contact spring 55 provided with b.

A male screw portion 70a screwed to a female screw portion block 66 (see FIG. 5) integrally fixed to the exterior member 34 on the outer periphery of the holder body 70 on the base side of the small diameter portion.
Are formed. The screw shape of the male screw portion 70a is formed as a so-called trapezoidal screw having a trapezoidal thread.
For this reason, the lamp holder 3 is attached to the female screw block 66.
Even when 2 is strongly screwed in, the screwed state does not become a strong bite state, and the lamp holder 32 can always be smoothly attached and detached.

The holder body 70 and the female screw block 66 are both made of non-conductive material. In addition, the hardness of the material of the holder body 70 is set to the female thread block 6
6 smaller than that of the male screw portion 70
If the width of the screw thread of a is formed smaller than that of the female thread block 66, and if it is screwed in with an excessive amount of force, the male thread 70a will be destroyed first, so that it is inexpensive. It is possible to deal with this by replacing the lamp holder 32, which is a large replacement part.

A lamp fixing claw 70b formed by providing a plurality of slits in a tubular portion is provided at the end of the tip of the small diameter portion of the holder main body 70, and the end of the lamp fixing claw 70b is formed. The inner peripheral surface has a lamp convex portion 21 protruding in a ring shape on the outer peripheral surface of the mounting portion of the illumination lamp 21.
A lamp locking portion 70c (see FIG. 5) for locking a is formed.

The inner diameter of the lamp fixing claw 70b is set to be slightly larger than the outer diameter of the mounting portion of the base end of the illumination lamp 21 that engages with the lamp fixing claw 70b, and the lamp locking portion 7 is provided.
0c is provided so as to be located between the lamp protrusion 21a and the stepped portion 21b of the illumination lamp 21 shown in FIG. Therefore, when the illumination lamp 21 is mounted on the lamp holder 32, the illumination lamp 21 can freely rotate around the optical axis direction of the illumination lamp 21 and can also move in the lamp optical axis direction.

Since the arm 55b of the lamp contact spring 55 is arranged at a position rearward of the lamp locking portion 70c, and the arm 55b is biased toward the front side by the spring, the lamp convex portion is formed. 21a is held over the lamp locking portion 70c (at this time, the female screw block 6
(The lamp holder 32 is not attached to 6)
Then, the lamp locking portion 70 is caused by the urging force of the arm portion 55b.
The lamp projection 21a is held so as to abut on c. On the other hand, when a force against the urging force of the arm portion 55b is applied, the lamp convex portion 21a can be moved to the deep side of the lamp fixing claw portion 70b.

The outer diameter of the lamp convex portion 21a is slightly larger than the inner peripheral surface of the lamp locking portion 70c, and the lamp convex portion 21a can be pushed in so as to be widened. By generating a click feeling at this time, the worker can recognize that the lamp mounting work has been reliably performed.

The lamp holder 32 holding the illuminating lamp 21 is screwed into the female threaded block 66 so that the illuminating lamp 21 abuts the lamp abutting portion 50a inside the lamp housing tube 50 and the lamp holder 32 of the lamp holder 32. In the mounted state in which the screwing is completed, each of the lamp locking portions 70c is set so as to fit between the lamp convex portion 21a and the stepped portion 21b which are within the moving range of the illumination lamp 21 with respect to the lamp holder 32 in the optical axis direction. The dimensions are set.

Further, the engagement of the lamp convex portion 21a of the illumination lamp 21 by the lamp engaging portion 70c is designed to be stronger than the spring force of the arm portion 55b of the lamp contact spring 55.

The arm portion 55b of the lamp contact spring 55 extends through the slit of the lamp fixing claw portion 70b to approximately the center of the holder body 70. When the illumination lamp 21 is mounted on the lamp holder 32, the arm portion 55b is The portion 55b elastically abuts one electrode on the bottom of the illumination lamp 21.

As shown in FIG. 5, a groove portion 70d into which a coin or the like can be inserted is formed at the base end of the holder main body 70, and the holder main body 70 is rotated by inserting the coin or the like into the groove portion 70d. The holder main body 70 can be attached and detached. Also, the lamp holder 3
The watertightness of the inside of the battery type light source 4 is maintained by the watertight ring 56 when the female screw block 2 is screwed on the female screw block 66.

The illuminating lamp 21 has a metal tube 21c forming one of the electrodes, and a non-conductive resin tube 57 which is hard to conduct heat to the outer peripheral portion of the metal cylindrical body 21c so as to expose the vicinity of the front end side of the lamp. .

In FIG. 5, the lamp holder 32 with the illumination lamp 21 is attached to the battery type light source 4, and the illumination lamp 2
The vicinity of the lamp chamber 36 in the state where 1 is turned on is shown. In this embodiment, there are two ON state switch positions,
The state shown in FIG. 8 (b) and the state shown in FIG. 9 (b), which are cross sections taken along the line BB of FIG. 5, are those ON states. The battery type light source 4 at this time is shown in FIG.
It is also the position indicated by the solid line and the broken line.

When switching the switch from the ON state to the OFF state, the exterior member 34 is rotated 90 ° in the forward and reverse directions with respect to the lamp housing cylinder 50 described below, and the state of FIG. 7B is obtained. To As a result, the switch is switched to the OFF state where the illumination lamp 21 is turned off.

Inside the lamp chamber 36, a substantially cylindrical lamp housing cylinder 50 made of a material having good conductivity is arranged. The base end portion of the lamp housing cylinder 50 has a flange shape, and the flange portion has elasticity,
A ring 48 that increases sliding resistance with the exterior member 34 is mounted. The lamp housing cylinder 50 is rotatably arranged with respect to the exterior member 34 with the ring 48 sandwiched between the lamp storage barrel 50 and the exterior member 34. An insulating block 52 that elastically deforms the conductive contact plate 40a is fixed to the outer periphery of the lamp housing cylinder 50 at a predetermined position. This fixed position corresponds to a switch position for turning ON / OFF the lighting of the illumination lamp 21 described later.

A substantially central portion of the inner hole of the lamp housing cylinder 50 is formed in such a size that the outer circumference of the cylindrical body 21c of the illuminating lamp 21 is fitted almost exactly, and a predetermined position of the inner circumference of the front end of the lamp housing cylinder 50. A lamp abutting portion 50a, which serves as a positioning portion for positioning the illumination lamp 21 by abutting the front end peripheral portion of the cylindrical body 21c of the illumination lamp 21, is formed protrudingly. The cylindrical body 21c is one electrode provided on the bottom side of the illumination lamp 21 and the other electrode.

As shown in FIG. 11, on the outer circumference of one end of the lamp housing cylinder 50 fitted into the lamp holder mounting opening 34b of the exterior member 34, a click mechanism is provided from an opening opposite to the lamp holder mounting opening 34b. The disk-shaped click plate 58, the spring 59, and the connection mouthpiece 27 for forming the part are inserted in this order. Further, since the positioning pin 26 is integrally screw-fixed to the connection mouthpiece 27 so as to protrude from the inner side surface of the connection mouthpiece 27 (see FIG. 5), the protruding portion 26a of the positioning pin 26 is fixed to the lamp. Storage cylinder 5
The connection base 27 is slid into the lamp housing cylinder 50 by engaging with the notch portion 50b provided at the end of No. 0. The click plate 58 has a substantially U-shaped slit 58 on the outer periphery thereof.
A is formed as a notch, and a tongue piece 27a having a part of its cylindrical portion extended from the base end side of the connection mouthpiece 27 is passed through and assembled to this slit 58a.

Further, the light guide base 11 of the endoscope 2
The connection base 27 is integrally fixed to the lamp housing cylinder 50 by screwing the lens holding cylinder 60, in which the condenser lens 22 is watertightly bonded and fixed to the inner bottom of the cylinder into which the lamp housing cylinder 50 is inserted. To be done.

The female screw block 66 is fitted and fixed to the lamp holder mounting opening 34b, and a watertight ring 61 is provided on the base end side of the connection base 27 fitted in the exterior member 34 to form a watertight structure. There is. A watertight ring 62 is inserted between the outer periphery of the front end side of the lens holding cylinder 60 and the connection mouthpiece 27 to ensure watertightness of this portion.

In such a state, the click plate 58 is urged by the spring elastic force of the spring 59 to cause the exterior member 34 to move.
It is always biased by the two protrusions 34d provided at two locations on the inner peripheral surface of the (see FIG. 11 and FIG. 7 (a)).

The click plate 58 has the spring 59.
It can move in the direction against the urging force of. Further, as shown in FIGS. 11 and 7 (a), the click plate 58 is formed with two groove portions 58b corresponding to the same angular positions (two places) as the protruding portion 34d, and by the switch operation. As shown in FIG. 7A, when the protrusion 34d falls into the groove 58b, a click feeling is provided.

The projecting portion 34d is formed in a stepped shape protruding inward from the inner diameter dimension into which the connection mouthpiece 27 is fitted, and is provided at a predetermined angle. Then, one side surface of the stepped portion protruding inward of the protrusion 34d serves as a rotation restricting portion 34e with which the tongue piece 27a of the connection mouthpiece 27 abuts.

As shown in FIG. 11, the projecting portion 34d is formed by a part of the resin exterior member 34, and the tongue piece 2 is made of a rigid body such as metal that abuts on the projecting portion 34d.
It is set to be inferior in strength to 7a. The mechanical strength of the protrusion 34d can be set by appropriately changing the width of the protrusion 34d, and the size is set to withstand the normal impact force applied to the rotation restricting portion 34e by the tongue piece 27a when the switch is operated. . However, the strength of the protrusion 34d forming the rotation restricting portion 34e should not exceed the connection strength of the connecting portion 12 connecting the connection mouthpiece 27 and the endoscope operating portion 6.

With the above rotation restricting structure, when rotating the exterior member 34 about the lamp housing cylinder 50 as an axis, the exterior member 34 is regulated to rotate within a predetermined angle range.
In the present embodiment, the click fixed position is set to the OFF state switch position, and the click fixed position is rotated in the forward and reverse directions within the range of 90 ° to move to the ON state switch position which is the restriction position. Has become. It is possible to appropriately change this rotation angle.

The exterior member 34 around the lamp chamber 36 is provided.
The outer surface of the concave and convex portion 6 for increasing the contact area with the atmosphere
7 is formed, and the heat generated from the illumination lamp 21 is efficiently radiated to the outside by the surface of the uneven portion 67.

Further, the endoscope apparatus 1 of this embodiment can be used by inserting the battery type light source probe 100 into the suction channel from the forceps insertion opening 17 of the endoscope 2.

As shown in FIG. 1, the battery type light source probe 100 is composed of a light guide probe portion 101 and a battery type light source main body portion 102. As shown in FIG. 2, the light guide probe unit 101 includes a light guide fiber 103 for transmitting light, an illumination window 104 provided at a tip of the light guide fiber 103, and a light guide fiber 103 for protecting the light guide fiber 103. It is composed of a tube 105 provided on the outer periphery of the light guide fiber 103.

As shown in FIG. 2, the battery type light source body 102 has a light source body 108 having a battery 106 and a lamp 107 therein.
A switch unit 109 that can be turned on and off by being rotated coaxially is provided at the rear end. The light guide probe unit 10 is provided at the front end of the light source body unit 108.
A fixing portion 111 for fixing 1 is provided. A screw is internally cut on the outer periphery of the front end of the light source main body 108, and an annular mounting portion 113 is provided to which the screw portion 112 can be screwed and mounted to the forceps insertion opening 17 of the endoscope 2. .

(Operation) The operation of the battery type light source 4 of this embodiment will be described. First, as shown in FIG. 4, the lid 31 of the light source body 30 is opened, and the two dry batteries 33 are housed in the battery housing portion 35 with their polarities reversed.
Close 1 After that, the lock claw 42 is engaged with the fixed claw 31a of the lid 31 while moving the opening lever 43,
The opening lever 43 is tilted to the side surface side of the exterior member 34, and the lid 31 is fixed by being pulled toward the light source body 30 side by the lock claw 42. As a result, the packing 46 provided on the lid 31 comes into close contact with the opening of the battery storage portion 35 to close the battery storage portion 35 in a watertight state.

Next, the base end side of the illumination lamp 21 is inserted into the lamp fixing claw portion 70b of the lamp holder 32 shown in FIG. 5 with a click feeling. And the lamp holder 3
The lamp holder 32 is rotated by inserting and locking a coin or the like into the groove portion 70d of the second groove 70d, and the portion of the male screw portion 70a of the lamp holder 32 is fixed to the female screw portion block 66 of the exterior member 34.
Screw it on. As a result, the illumination lamp 21 is loaded in the lamp chamber 36 of the light source body 30.

At this time, before the screwing of the lamp holder 32 to the exterior member 34 of the lamp holder 32 is completed, the other end of the illumination lamp 21, which is the distal end side peripheral portion, is provided in the lamp housing cylinder 50 for positioning. Lamp contact part 50a
Position it by abutting against. That is, the illumination lamp 21
The lamp holder 32 is screwed into the exterior member 34 in a state where the lamp convex portion 21a of the above is in contact with the lamp locking portion 70c.

The lamp contact portion 50a is the illumination lamp 21.
It has a function of positioning the illumination lamp 21 at a position where the light emitted from the light is most efficiently collected at the light guide fiber entrance end of the endoscope. At this time, the holder body 7
0 is integrally fixed to the exterior member 34, and the conductive contact plate 40c connected to the output of the transformer circuit 39 elastically contacts the ring-shaped portion 55a of the lamp contact spring 55 as shown in FIG. Further, the inside of the lamp chamber 36 in the loaded state of the illumination lamp 21 is kept watertight by the watertight ring 56.

Next, the light guide base 11 of the endoscope 2
The connection portion 12 of the battery-type light source 4 is connected to. As a result, the connecting cylinder 51 of the endoscope operating section 6 and the connecting section 12 are connected.
The connection base 27 is integrally fixed, and the lamp housing cylinder 50 integrated with the connection base 27 is also integrally fixed to the endoscope operation section 6.

When the battery type light source 4 is at the position shown by the alternate long and short dash line in FIG. 6 (the position where it overlaps with the endoscope operation section 6), the lamp lighting switch is in the OFF position. As shown in b), the conductive contact plate 40
a rides on the insulating block 52 and the conductive contact plate 40a,
Since 40b are separated from each other, the transformer circuit 39 does not start. That is, the illumination lamp 21 is not turned on. When the lamp is off, power is not supplied to the remaining amount detection circuit 25, so that the remaining amount display section 38 does not display the remaining amount.

In addition, similarly, the tongue piece 27a of the connection mouthpiece 27 when this lamp lighting switch is in the OFF state is shown in FIG.
As shown in (a), it is at an intermediate position between the two rotation restricting portions 34e, and at the same time, at a position where the projection 34d is fitted into and engaged with the groove 58b of the click plate 58. That is, the light source body 30 of the battery-type light source 4 is held by the click mechanism portion, and the switch O
The FF function is assigned.

Next, when the switch is turned on,
The light source body 30 of the battery-type light source 4 is rotated with respect to the operation unit 6 and is positioned at the solid line position (a) or the broken line position (c) shown in FIG. It should be noted that the rotation direction in which the remaining amount display portion 38 faces the eyepiece portion 7 side is defined as a positive direction. At this time, the rotation range of the exterior member 34 that rotates about the lamp housing cylinder 50 is determined by the rotation restricting portion 34e that contacts the tongue piece 27a as shown in FIG. 8A. OFF in this embodiment
It is set to an angle of about 90 ° from the position.

Further, the tongue piece 27a and the rotation restricting portion 3
If an excessive torque is applied from the abutting state of 4e, the protrusion 34d that is in contact with the tongue piece 27a before the connecting member between the endoscope operating portion 6 and the connecting portion 12 is destroyed. Destroys first. However, in this case, switch O
The use of the endoscope apparatus is not interrupted immediately because the main function of the switch is not affected because the rotation restriction at the N position is eliminated.

Further, as shown in FIG. 8B, in the positive ON state, the conductive contact plate 40a comes down from the insulating block 52 and contacts the conductive contact plate 40b. In this ON state, the power from the dry battery 33 is supplied to the transformer circuit 39, and the power boosted to the rated voltage is supplied to the illumination lamp 21. That is, the transformer circuit 39, the conductive contact plate 40c, the lamp contact spring 55, the illumination lamp 2
1, lamp housing cylinder 50, conductive contact plate 40b, transformer circuit 3
A closed circuit consisting of 9 is configured, and the illumination lamp 21 is turned on.

Simultaneously with the lighting of the illumination lamp 21, the remaining amount detection circuit 25 is also activated to monitor the output voltage value of the dry battery 33, and the remaining battery amount is converted from the voltage value to display the remaining amount display section at any time. 38.

The illumination light emitted from the illumination lamp 21 is condensed by the condenser lens 22 and efficiently incident on the light guide fiber arranged in the light guide mouthpiece 11 of the endoscope 2. Then, the illumination light that has entered the light guide fiber is transmitted to the tip side thereof, emitted from the illumination window 20 to the front side, and illuminates a subject such as a diseased part in the body cavity into which the insertion part 5 is inserted. An optical image of the subject illuminated by this illumination light is formed on the distal end surface of the image guide fiber by the objective lens 23, transmitted to the proximal end side of the image guide fiber, and observed by looking into the eyepiece 7. Thus, endoscopic diagnosis of the affected area or the like can be performed.

At this time, the heat generated while the illumination lamp 21 is turned on is transmitted to the lamp housing cylinder 50, and further from the connecting portion 12 to the light guide cap 11 and the connecting cylinder 51 of the endoscope 2. Then, the heat diffuses from the light guide cap 11 and the connection cylinder 51 to the internal metal parts of the operation portion 6.

In order to further improve the light-collecting efficiency, the glass bulb itself of the illumination lamp 21 may have a lens-like thickness so that the light emitted from the illumination lamp 21 is closer to a spot light. .

When the light source body 30 is turned to the OFF position after the observation is completed, the click mechanism positions and fixes the OFF position, and the conductive contact plate 40a is mounted on the insulating block 52 to display the illumination lamp 21 and the remaining amount. The part 38 is turned off at the same time.

On the other hand, the light source body 30 with respect to the endoscope 2 is
For example, it is possible to turn the second lamp in the ON state by rotating it in the direction opposite to the above and arranging it at the position (c) shown by the broken line in FIG. At this time, the rotation range of the exterior member 34 that rotates about the lamp housing cylinder 50 is the tongue piece 27a.
And a rotation restricting portion 34e that abuts against the rotation restricting portion 34e, and the rotation angle is set to about 90 ° from the OFF switch position. Therefore, the rotation angle of the light source body 30 with respect to the operation portion 6 of the endoscope 2 is 90 ° in each of forward and reverse directions, that is, 180 ° in total when the OFF switch position is the center. Further, the contact state of the conductive contact plates 40a and 40b when rotated in the reverse direction is as shown in FIG. 9 (b). Regarding the switch operation (mechanism) in the reverse direction, the switch operation in the forward direction described above is performed. Since it has the same configuration as the (mechanism) except for the rotation direction, the description thereof will be omitted.

The total rotation angle and the position of the OFF switch that is click-fixed can be appropriately adjusted by changing the angle at which the protrusion 34d is arranged and the position of the groove 58b of the click plate 58. In addition, the protrusion 3
It is also possible to set a plurality of click fixing positions within the entire rotation angle range by changing the number and arrangement positions of the 4d and the groove portions 58b, and assigning a plurality of switch functions which fulfill a predetermined function to the click fixing positions. You may do it.

The OFF switch position is set so that the light source main body 30 is parallel to the operating portion 6 so that the battery type light source 4 can be easily stored in a storage place while being attached to the endoscope 2. .

When the amount of illumination light is insufficient with only the battery type light source 4, the light guide probe portion 101 is inserted through the forceps insertion opening 17 of the endoscope 2 and the tip of the light guide probe portion 101 is inserted. The attachment portion 113 is attached and fixed to the forceps insertion opening 17 in a state where the attachment portion 113 extends to the tip of the endoscope. In this state, the switch 107 is rotated to turn on the lamp 107, and the light guide fiber 10
It is possible to illuminate the subject by transmitting light to the distal end portion of the endoscope via 3.

(Effect) In the present embodiment, the connection fixing strength between the endoscope operating portion 6 and the connecting portion 12 of the battery-type light source 4 is strong enough with respect to the force applied during the switch operation in actual use. Further, the mechanical strength of a member that is provided on the battery-type light source 4 side and that forms a rotation restricting portion 34e that restricts the rotation in the switch operation is determined as the mechanical strength of the endoscope operation portion 6 and the battery-type light source 4. Connection 1
When the switch operation is further performed from the rotation restricting position with an unnecessarily large amount of force, the rotation restricting portion 34e of the battery-type light source 4 is destroyed first, by configuring the connection restricting strength to be smaller than the connection fixing strength with 2. It is possible to prevent the expensive endoscope body from being destroyed.

Since the battery type light source 4 can be easily replaced, a spare light source can be prepared so that even if the above-mentioned portion is destroyed during use of the endoscope apparatus, it can be promptly dealt with. It is possible.

On the other hand, even when there is no spare battery type light source 4, if the rotation restricting portion 34e is destroyed, the rotation restriction at the switch operation ON position is simply eliminated, and the illumination lamp is turned on or off. Since there is no effect on the main function of, it is possible to continue the inspection.

Further, in the case where the illumination light quantity is insufficient with only the battery type light source 4, the illumination light quantity can be supplemented by using the present battery type light source probe 100, and the application cases can be expanded.

[Second Embodiment] (Structure) FIGS. 12 to 14 are views relating to a second embodiment of the present invention. FIG. 12 is a sectional view taken along the line AA in FIG. 5 in the switch. FIG. 13 is an explanatory view showing a switch position in an off state corresponding to FIG. 7, FIG. 13 is a cross-sectional view showing a relationship between a connection mouthpiece and a position pin pin screwed to the connection mouthpiece,
FIG. 14 is a cross-sectional view of another configuration of the connection mouthpiece and the positioning pin screwed to the connection mouthpiece.

In this embodiment, the projection 3 formed on the exterior member 34 of the battery type light source 4 in the first embodiment described above.
The second protrusion 65 is provided at a position adjacent to 4d, which is different from the first embodiment described above.

The second protrusion 65 is outside the rotation range in which the tongue piece 27a is guided, that is, the protrusion 34d is formed on the rotation direction side where the tongue piece 27a abuts the rotation restricting portion 34e of the protrusion 34d. Adjacent to each other. Therefore, the rotation range of the battery type light source 4 at the time of operating the switch is the same as that in the first embodiment.

Further, as shown in FIG. 12, the end of the second protrusion 65 is at a position deeper than the end of the protrusion 34d and does not contact the click plate 58. The second protrusion 65 is also a part of the exterior member 34 and is made of the same material as the protrusion 34d.

Further, as shown in FIG.
The connection mouthpiece 27 is provided with two positioning pins 26. Further, two pin receiving portions 25 of the connecting cylinder 51 are provided corresponding to the positioning pins 26. The number of the positioning pins 26 is not limited to this, and a plurality of positioning pins 26 may be arranged. When a plurality of positioning pins 26 are provided in this manner, the positioning pins 26 are arranged in an asymmetrical positional relationship as shown in FIG. Can be prevented.

With such a structure, the torque in the switch operating direction in the connected state of the battery type light source 4 and the endoscope operating section 6 is dispersed, and as a result, the mechanical strength of the connecting section 12 is improved. You can

Further, as shown in FIG. 14, even if the rotation restricting flat surface portion 27b which engages with the connection cylinder 51 of the operation portion 6 of the endoscope 2 is provided on the outer peripheral surface of the connection mouthpiece 27, the same effect as described above can be obtained. You can Other configurations are the same as those of the first embodiment described above.

(Operation) The switch operation is performed as in the first embodiment. At this time, when the protrusion 34d is damaged by excessive torque, the second protrusion 65 adjacent thereto is brought into contact with the tongue 27a, so that the rotation is restricted within a range in which the switch operation does not greatly exceed the specified position. . Other operations are the same as those of the first embodiment described above.

(Effect) According to the present embodiment, even if the first protrusion 34d is damaged, the rotation is restricted by the second protrusion 65, so that the switch rotation restricting portion 34e may be completely destroyed suddenly. Even if it occurs during use, it does not significantly hinder the operation.

By improving the connection strength between the battery-type light source 4 and the endoscope operating section 6 in the switch operating direction, the structure for preventing destruction of the endoscope can be taken even if the strength of the protrusion 34d is improved. It is possible to raise the level of overall resistance against switch operation.

The present invention is not limited to the above-described embodiments, but can be applied to other forms. Further, according to the above description, the items listed below and the items obtained by arbitrarily combining the items listed below can be obtained.

(Appendix) 1. An endoscope body in which an incident end portion of a light guide that guides illumination light for illuminating an object is arranged in an operation portion, and an operation portion of the endoscope body is configured to be connectable, and the illumination light is emitted to the light guide. A light source unit including a light source to be supplied, a connecting portion that connects the light source unit to an operating portion of the endoscope main body, and a connecting portion that is provided in the connecting portion and is relative to the operating portion of the endoscope main body. Rotation guide means for supporting the light source unit so that the endoscope body is rotated, and the endoscope main body when the light source unit is connected to the operation portion of the endoscope main body, which is provided in the connection portion. Is provided on the side of the light source unit that rotates relative to the operation unit of the endoscope body and the stopper unit positioned on the operation unit of the endoscope body, and the operation of the light source unit by abutting against the stopper unit. Times relative to the department A rotation restricting portion for restricting a terminal position, wherein the mechanical strength of a member forming at least one of the stopper portion and the rotation restricting portion is smaller than the connection strength of the connecting portion. Endoscope device.

2. The endoscope apparatus according to appendix 1, further comprising a light source switch that switches ON / OFF of the light source by rotating the light source unit relative to an operation unit of the endoscope body.

3. The endoscope apparatus according to appendix 1, wherein a plurality of the rotation restricting portions are arranged in a rotation direction relative to the operation portion of the light source unit.

4. The endoscope device according to appendix 1, wherein the rotation restricting portion is made of resin, and the rotation stopper portion is made of metal.

5. The endoscope device according to appendix 1, wherein the rotation restricting portion is a part of an exterior component that constitutes the light source unit.

6. The operation section of the endoscope body and the light source unit are connected by a positioning pin member provided on the light source unit side and a pin receiving section provided on the operation section side at a position corresponding thereto. The endoscope apparatus according to appendix 1, wherein relative rotation is restricted by engagement.

7. The endoscope apparatus according to appendix 6, wherein the pin member and a plurality of pin receiving portions corresponding to the pin member are provided.

8. The operation unit and the light source unit are connected to each other so that a relative rotation is regulated by a plane portion provided on the side of the light source unit and a plane portion provided on the side of the operation unit into which the plane unit is inserted. The endoscope apparatus according to appendix 1, which is being performed.

9. The endoscope apparatus according to appendix 1, wherein the light source unit has a built-in battery for supplying electric power for turning on a light source included in the light source unit.

[0121]

As described above, according to the present invention,
Even if the light source unit is rotated or switched with excessive force, the endoscope body will not be damaged, and the battery-type light source that is cheaper and replaceable than the endoscope body will break first. Therefore, the damage can be minimized.

[Brief description of drawings]

FIG. 1 is a perspective view showing an entire endoscope apparatus according to a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a battery-type light source probe in the endoscope device according to the first embodiment.

FIG. 3 is an explanatory diagram showing an outer appearance of an operation unit of an endoscope and a connection unit of a battery-type light source in the endoscope apparatus according to the first embodiment.

FIG. 4 is a perspective view showing an entire battery-type light source in the endoscope apparatus according to the first embodiment.

FIG. 5 is a longitudinal cross-sectional view of a portion mainly including the lamp chamber of the battery-type light source in the endoscope apparatus according to the first embodiment.

FIG. 6 is an explanatory diagram of a switch operation of the battery type light source due to a difference in relative position between the operation unit of the endoscope and the battery type light source in the endoscope apparatus according to the first embodiment.

FIG. 7 shows an off state of a switch in the endoscope apparatus according to the first embodiment, in which (a) is A in FIG.
-A sectional view taken along line A, and (b) is a sectional view taken along line BB in FIG.

FIG. 8 is a view showing an ON state of a switch in the endoscope apparatus according to the first embodiment, in which (a) is A in FIG.
-A sectional view taken along line A, and (b) is a sectional view taken along line BB in FIG.

9 shows another switch position when the switch is in the on state in the endoscope apparatus according to the first embodiment, and FIG. 9 (a) is a cross-sectional view taken along the line AA in FIG. ,
(B) is sectional drawing which follows the BB line in FIG.

FIG. 10 is an explanatory diagram showing a configuration of a power supply circuit of a battery-type light source in the endoscope apparatus according to the first embodiment.

FIG. 11 is an exploded perspective view of components forming a switch click mechanism in the endoscope apparatus according to the first embodiment.

FIG. 12 is an explanatory view showing a switch position in an off state corresponding to FIG. 7 taken along the line AA in FIG. 5 in the switch of the endoscope apparatus according to the second embodiment of the present invention.

FIG. 13 is a cross-sectional view showing a relationship between a connection mouthpiece and a positioning pin screwed to the connection mouthpiece in the endoscope apparatus according to the second embodiment.

FIG. 14 is a cross-sectional view of another embodiment of the connection mouthpiece and the positioning pin screwed to the connection mouthpiece in the endoscope apparatus according to the second embodiment.

[Explanation of symbols]

1 ... Endoscopic device 2 ... Endoscope 4 ... Battery type light source 5 ... insertion part 6 ... Operation part 12 ... Connection part 17 ... Forceps insertion port 21 ... Lighting lamp 32 ... Lamp holder 33 ... dry cell 34 ... Exterior member 34d ... Projection 34e ... Rotation restriction unit 35 ... Battery storage section 36 ... Lamp room 40a ... Conductive contact plate 40b ... Conductive contact plate 40c ... Conductive contact plate

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2H040 CA04 CA06 CA09                 4C061 AA00 BB01 CC04 FF07 GG01                       JJ06 JJ11 QQ09 RR30

Claims (3)

[Claims] 1. An endoscope main body in which an incident end portion of a light guide that guides illumination light for illuminating an object is arranged in an operation portion, and the endoscope main body is connectable to the operation portion, and the light is provided. A light source unit that includes a light source that supplies illumination light to a guide, a connection unit that connects the light source unit to an operation unit of the endoscope body, and an operation of the endoscope body that is provided in the connection unit. Rotation guide means for supporting the light source unit so as to rotate relatively to the section, and provided in the connection portion, when the light source unit is connected to the operation portion of the endoscope body, A stopper portion that is positioned on the operation portion of the endoscope body, and is provided on the light source unit side, rotates relative to the operation portion of the endoscope body, and abuts on the stopper portion. Pair with the operation unit of the light source unit. And a rotation restricting portion that restricts a relative rotation end position, wherein the mechanical strength of a member forming at least one of the stopper portion and the rotation restricting portion is smaller than the connection strength of the connecting portion. An endoscopic device characterized by having been performed. 2. The light source switch according to claim 1, further comprising a light source switch for switching on / off of the light source by rotating the light source unit relative to an operation unit of the endoscope body. Endoscopic device. 3. The light source unit according to claim 1, wherein a plurality of rotation restricting portions are arranged in a relative rotating direction of the light source unit and the operating portion. Endoscope device.