JP2997335B2 - Endoscope imaging device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope photographing apparatus for detachably mounting an eyepiece of an endoscope for photographing.

[0002]

2. Description of the Related Art An endoscope photographing apparatus has been conventionally automated by an electric motor in order to facilitate photographing operation. In such an endoscope photographing apparatus, generally, driving power of an electromagnetic shutter, a winding motor, and the like is supplied from a power source provided in the light source device via an electric wire in the endoscope, and automatically exposed. Sync signal is transmitted from the imaging device for the endoscope to the light source device via the wiring in the endoscope.

[0003] However, even with such automation, in order to press the release switch of the camera by hand, the bending operation, the biopsy sniper operation, and other endoscope operations must be interrupted. As a result, it is often necessary to perform a bending operation or the like after photographing. Conversely, if the operation of the endoscope is more important, a precious shutter chance is missed.

In view of this, there is a camera in which a release contact is provided on the outer surface of the photographing device, a foot switch is connected to the release contact, and the release operation can be performed with a foot (Japanese Patent Laid-Open No. 55-138436).

However, when a foot switch is connected to the photographing device, a long connection cord is dragged from the foot of the photographing device, and operability is increased when the photographing device is attached / detached, the endoscope is operated, and the foot switch is operated. It will significantly impair.

Therefore, recently, the photographing operation has been performed using a foot switch connected to the light source device side by keeping the shutter button of the photographing device pressed down with an annular rubber band. JP-A-2-85
No. 415).

[0007]

However, the reason why the shutter button of the photographing apparatus is kept pressed by the rubber band is that the shutter button is pressed down due to slight displacement of the rubber band or deterioration of the rubber. Is incomplete, the photographing operation is not performed even if the foot switch is depressed, and a shutter chance is lost, or the rubber band is lost, so that the foot switch becomes unusable.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an endoscope photographing apparatus capable of reliably performing a release operation using a foot switch connected to a light source device via an endoscope. .

[0009]

In order to achieve the above object, an endoscope photographing apparatus according to the present invention receives drive power from a light source device via an electric wire built into the endoscope. In the endoscope photographing device provided with the wiring of and the wiring for transmitting a synchro signal to the light source device, a contact group that is conductive to the wiring connected to the endoscope and a release contact that is conductive to a release switch. On the outer surface,
A cap for turning the release contact on at all times is provided detachably from the outside.

The cap may cover the contact group at the same time as the release contact is always turned on.

[0011]

An embodiment will be described with reference to the drawings.

FIG. 2 shows an external view of the apparatus, and FIG. 1 schematically shows electric wiring. In the figure, reference numeral 1 denotes an endoscope, 2 denotes an operation unit, 3 denotes a flexible insertion tube, 4 denotes an eyepiece, and 5 denotes a flexible end having a connector 12 connected to a light source device 10. Of the connecting pipe.

The eyepiece 4 and the connector 12 are provided with four contacts, respectively, for electrically connecting the four contacts.
The electric wires 21, 22, 23, and 24 are provided through the connection pipe section 5 and the operation section 2. 4a is a contact provided on the eyepiece 4.

Reference numeral 6 denotes an endoscope dedicated camera.
Is detachably attached to the eyepiece 4 by the mount 7. Reference numeral 7a denotes a contact piece that contacts the contact 4a of the eyepiece 4 when the mount 7 is attached to the eyepiece 4.

A release switch 8 is provided on the upper surface side of the camera 6. Normally, the photographing operation of the camera 6 is started by pressing the release switch 8.

Reference numeral 10 denotes a light source device for supplying illumination light to an illumination light guide fiber (not shown) of the endoscope 1, and a connector 12 is detachably connected thereto.

In the light source device 10, in addition to the light source lamp,
A power supply 13 for driving the camera, a control circuit 14, and the like are included. Then, by connecting the connector 12 to the light source device 10, the electric wires 21, 22, 23,
Drive power is supplied from the light source device 10 to the camera 6 via 24, and a synchro signal (FP signal) is transmitted from the camera 6 to the light source device 10.

Reference numeral 17 denotes a foot switch which is detachably connected to the light source device 10, and its operation will be described later.

Of the wires in the camera 6, two wires 33, 34
Is a power supply line for a motor drive or the like.
Books 31 and 32 are for synchro contacts, and are for sending FP signals to the light source device 10 side. The release switch 8 is shared with the negative line 34 of the power supply line. Reference numeral 35 denotes a drive circuit for causing a device in the camera 6 to perform a shooting operation.

A photographing signal connector 40 is provided so as to be exposed on the outer surface of the body of the camera 6. Shooting signal connector 4
0 has five contacts 41 to 45, of which four contacts 41 to 44 are electrically connected to four contacts 7 a of the mount 7. Therefore, when photographing is performed using an endoscope provided with no electric wire for photographing signals, this photographing signal connector 4 is connected to an adapter cable (not shown).
By connecting the light source device 10 to the light source device 10, a photographing operation can be performed. The fifth contact 45 is connected in parallel with the release switch 8 together with the fourth contact 44.

As shown in FIGS. 1 and 2, a cap 50 is detachably provided on the photographing signal connector 40.

FIG. 3 shows a state in which a cap 50 is attached to the photographing signal connector 40. The cap 50 is attached to the photographing signal connector 40 by a tightening nut 51 screwed to the photographing signal connector 40 side. Then, in the mounted state, the contacts 44 and 45 connected in parallel with the release switch 8 are short-circuited via the short-circuit member 52, and the state is the same as the state where the release switch 8 is always turned on.

However, as shown in FIG. 4, the other terminals 41 to 43 which are not electrically connected to the release switch 8 are also provided.
The electrical connection and the like are not performed by the cap 50, only the exposed portion is covered, and the intrusion of water droplets and dust is prevented by the cap 50.

FIG. 5 is a block diagram showing the internal configuration of the control circuit 14 provided in the light source device 10. The operation and the operation will be described with reference to the time chart of FIG.

A three-second reset pulse generator 181 and a three-second off pulse generator 182 are connected to the foot switch 17. When the foot switch 17 is turned on, a three-second timer reset pulse and a three-second timer off pulse are generated. Occurs, turns off the three-second timer 183 once,
In response to a signal from the second off pulse generator 182, a three second timer trigger pulse is generated in the three second trigger pulse generator 184, and the three second timer 183 is started.

Then, the motor drive power controller 185
Then, for example, a power supply of 4.5 V is turned on. When the release switch 8 is turned on, the turning on of the power of 4.5 V has the same effect as the turning on of the release switch.
If the release switch 8 is not on,
These operations are not started.

[0027] At this time, the time _{T 1} of the from 4.5V power supply is turned on until the sync signal of the camera 6 (FP signal) is started is a time determined by the camera 6, for example 0.1 seconds It is about. Then, the time T ₂ of the up FP signal ends is set to the exposure time of the camera 6 itself, when the exposure condition is manually set T ₂
It is fixed, in the case of automatic exposure T ₂ are made variable.

[0028] In the waveform of the motor drive power control unit 185, the range of T ₃ that is started by the end of the FP signal is the time of the automatic film winding fried, for example, about 0.4 seconds.

[0029] becomes the next photographing is performed a double take in the above-mentioned range of T ₂ and T _3. Therefore, in the present embodiment, the above-described T
A pulse equivalent to ₃ is generated and input to the double shooting prevention pulse generation section 187 to cause the double shooting prevention pulse generation section 187 to
, The anti-double shooting pulse T ₄ synchronized with the range between T ₂ and T ₃ is output to the 3-second timer 183.

As a result, even if the foot switch 17 is stepped on during that time, the 4.5 second power supply is not turned off by keeping the three-second timer 183 on so that
Prevents double shots.

[0031] After the double take prevention pulse T ₄ is released, by stepping on the foot switch 17, the operation is repeated. Then, when the last frame of the film is shot and the film is wound up on the winding side,
The motor is driven until the 3-second pulse is turned off, and stops after 3 seconds. Therefore, there is no disadvantage that the motor keeps running if the film is wound up as in the conventional case.

In the above embodiment, the set time of the timer is set to 3 seconds. However, the present invention is not limited to this, and may be 3 seconds or more or 3 seconds or less.

In the above embodiment, the camera 6 is of the motor drive type. However, the present invention is not limited to this. For example, an electromagnetic release switch may be used to control only the release operation. A camera or the like configured to perform the above may be used.

[0034]

According to the imaging device for an endoscope of the present invention, the release switch is always turned on by simply attaching a detachable cap to the contact provided on the outer surface of the camera, and the connection to the light source device is made. The release operation can be performed using the foot switch that has been set, so that it is possible to use the existing endoscope to take a picture at the best shutter chance without disturbing the operation of the endoscope. It has an excellent effect that the ON state can be stably and reliably maintained.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an electric wiring of an embodiment.

FIG. 2 is a configuration perspective view of an embodiment.

FIG. 3 is a partial side sectional view of the embodiment.

FIG. 4 is a partial front sectional view of the embodiment.

FIG. 5 is a block diagram of a control circuit according to the embodiment.

FIG. 6 is a time chart illustrating an operation of the control circuit according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Endoscope 6 Camera 10 Light source device 21-24 Electric wire 31-34 Wiring 41-44 Contact 44, 45 Release contact 50 Cap 52 Short-circuit member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G02B 23/26 A61B 1/04 360 A61B 1/04 362

Claims (1)

(57) [Claims] An imaging system for an endoscope provided with wiring for receiving supply of driving power from a light source device via an electric wire built into the endoscope and wiring for transmitting a synchro signal to the light source device. In the apparatus, a contact group connected to the wiring connected to the endoscope and a release contact connected to a release switch are provided on an outer surface, and the contact group and the release contact are simultaneously shielded from the outside.
Constantly cap for the ON state, endoscopic imaging apparatus characterized by comprising from the outside to disengageably the release contacts.