JPS5934525A - Camera adapter for endoscope - Google Patents

Abstract

PURPOSE:To generate a synchronizing signal without using a synchro cord and a double cable release, by providing an adapter body with a synchronizing signal generating means. CONSTITUTION:A camera 8 is connected to the connection part 4 of an endoscope 1 through the main body 7 of the adapter and when the shutter of the camera 8 is released, a reflecting mirror 22 is rotated from an observation position to a photographic position shown by a phantom line to vary the output of a photoreflector 39, and it is transferred to the control circuit 19 of a light source controller through an amplifier. Therefore, photographic light from a discharge tube 16 enters a light guide 12 through a lens 18 to illuminate an observation place (a), and an observation image sent from an objective 13 is inputted to the camera 8 through an image guide 11 to drive the shutter successively to the rotation of the reflecting mirror 22, exposing the observation image on a film surface 24.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endoscope camera adapter for connecting a camera to an endoscope.

Generally, when a camera is connected to an endoscope via an adapter to take a photograph, a synchronization signal is transmitted to a light source device connected to the endoscope in response to a release operation of the camera. The light source device that receives the synchronization signal emits all the photographing light, which is brighter than normal observation light, and guides it into the endoscope.

By the way, in order to transmit a synchronization signal to the full light source device in accordance with the release operation of the camera, conventionally the camera and the adapter have been connected via a synchronization cord, or a double cable release r'i has been used. However, if you connect the camera and adapter with a synchronization cord or double cable release, you will have to attach and detach the synchronization cord or double cable release each time you attach or detach the camera to the adapter, making operability extremely difficult. This has the problem of being bad and inconvenient. Moreover, there is a risk that a connection failure with the synchro-coated brag may cause a complete failure in shooting, and it may also be a hindrance when operating the camera.

This invention was made based on the above circumstances, and its purpose is to detect the release operation of a camera and transmit the synchronization signal to the light source device without using a synchronization cord or double cable release, and to improve operability. It is an object of the present invention to provide a camera adapter for an internal mirror, which can improve reliability, eliminate the possibility of electrical connection failure, and significantly increase reliability.

EMBODIMENT OF THE INVENTION Hereinafter, this invention will be explained based on the embodiments shown in the drawings. In FIG. 1, reference numeral 1 denotes an endoscope that is operated from an operating section 2 and an insertion section 3. As shown in FIG. The operating section 2 is provided with an eyepiece section 4, an angle knob 5, etc., and is also connected to a unilateral cord 6. A camera 8 is connected to the eyepiece section 4 via a main body 7 of an adapter as described later. In addition, the universal cord 6 has a connector 9 at the end.
is provided and connected to the light source device 10 via this connector 9. 1 Further, an image guide 11 and a light guide 12 are inserted through the inner mirror 1 as shown in FIG. The image guide 11 is provided at the tip of the gold insertion part 3 at one end.
It is made to face the C objective lens 13, and the other end is made to face the eyepiece lens 14 provided in the entire eyepiece section 4. Further, the light guide 12 has one end facing the distal end surface of the insertion portion 3 and the other end facing the end surface of the connector 9 via the universal cord 6. This light guide 12 receives observation light from an observation light source 15 built into the light source device 10, and a discharge tube 1.
Photographing light from 6 is made incident. That is, an optical path switching mirror 17 is provided in the light source device 10 so as to be rotatably driven by a drive section (not shown), and the optical path switching mirror 17 is not driven and the second optical path switching mirror 17 is not driven.
As shown by the solid line in the figure, when the light guide 1 is tilted at an angle of approximately 45 degrees, the observation light from the observation light source 15 is
2. Further, when the optical path switching mirror 17 is driven and rotated approximately horizontally as shown by the imaginary line in the figure, the photographing light from the discharge tube 16 enters the light guide 12 via the lens 18. Note that the driving section and the observation light source 15
The discharge tube 16 is connected to a control circuit 19 built into the light source device #10, and is controlled by signals from the control circuit 19 as described later.

Furthermore, as shown in FIG. 3, the camera 8 has a plurality of engaging claws 21 on the periphery of the opening 20 through which the interchangeable lens is attached/detached.
・Protrudes inward. Inside the camera 8, a reflecting mirror 22 is disposed facing the opening 20, and behind the reflecting mirror 22, a diagonal shutter and a film passage (not shown) are arranged. ing. Further, a pentaprism 23 is disposed above the reflecting mirror 22. Further, the reflecting mirror 22 is held at an angle of 45° with respect to the film plane 24 as shown by the solid line in FIG. From the observation position leading to the observation optical system formed by The rotation axis 2 moves to the shooting position where the observation image is guided to the film surface 24 side.
It is rotatable around 6. The reflecting mirror 22 is always held at the observation position, and
When the camera 8 is released, the reflecting mirror 22 is rotated to the photographing position by a drive mechanism (not shown), and then the shutter is driven and the film surface 24 is exposed.

On the other hand, the main body 2 of the adapter is approximately cylindrical. As shown in FIG. 4, this main body 7 has a first connecting part 27 that removably connects the eyepiece 4 of the internal mirror at one end, and a first connecting part 27 that removably connects the camera 8 to the other end. The two connecting portions 2B are each provided with a hook. The first connecting portion 27 includes a plurality of engaging convex portions 30 that protrude inwardly from the cylindrical body 29. The second connecting portion 28 also has a plurality of engaging protrusions 6 to 33 protruding inwardly from the cylindrical body 32. A bayonet mount is formed by engaging grooves 34 formed inside these engaging protrusions 33. Further, inside the main body 7, a plurality of lenses 35... are arranged on the central axis, and the image guide 11 of the endoscope 1 and each lens 35... are all valved and sent. A spectroscope 36 is disposed to divide a part of the observed image in a direction perpendicular to the gold rectilinear movement direction. The observation image traveling straight through the spectrometer 36 is sent to the camera 8 side, and the observation image divided and captured by the spectrometer 36 is received by the light receiving element 38 via the lens 37. There is. This light-receiving element 38 is used, for example, to automatically set the exposure of the camera 8. moreover,
When the camera 8 is connected to the second connecting portion 28 and the camera 8 is released, the reflector 22 of the camera 8 rotates from the viewing position to the photographing position. A photoreflector (synchronizing signal generating means) 39 is provided for detecting the rotational movement of the reflecting mirror 22 and generating a synchronizing signal when detecting the rotational movement of the reflecting mirror 22. This photoreflector 391 is arranged at a portion facing the reflecting mirror 22 when the reflecting mirror 22 is moved to the photographing position during the release operation of the camera 8.

Next, the operation of the above configuration will be explained.

As shown in FIG. 1, a camera 8 is connected to the eyepiece 4 of the endoscope 1 through the entire main body 7 of the adapter, and when the camera 8 is released, the reflector 22 of the camera 8 changes as shown in FIGS. 4
A rotation operation is carried out from the observation position indicated by the solid line in the figure to the photographing position indicated by the imaginary line in the figure. When the reflecting mirror 22 rotates in this way and reaches the photographing position, the output of the photoreflector 39 changes, and this output change of the photoreflector 39 is transmitted to the control circuit of the light source device 10 via an amplifier (not shown). 19.

That is, when the photoreflector 39 detects the rotational movement of the reflecting mirror 22 accompanying the release of the camera 8, a synchronization signal is transmitted from the amplifier to the control circuit 19. In response to the synchronization signal, the control circuit 19 turns off the observation light source 15, rotates the optical path switching mirror 17, and fully discharges the discharge tube 16. Therefore, the photographing light from the discharge tube 16 enters the light guide 12 via the lens 18 and illuminates the observation area a, and the observation image sent from the n1 objective lens 13 passes through the entire image guide 11 and is introduced into the camera 8. Following the rotating operation of the reflecting mirror 22, the shutter is driven and removed, thereby exposing an observation image onto the film surface 24.

Thus, in the case of the above configuration, the main body 7 of the adapter
A photo reflector 39 is provided on the camera 80 and the reflecting mirror 22
Since the 0 rotation movement is detected and the synchronization signal is output based on this rotation movement of the reflector 220, the camera release movement can be detected without the need for a synchro cord or double cable release all the way around as in the past. , a synchronization signal can be transmitted to the light source device 10. Therefore, it is possible to omit the operation of attaching and detaching the synchro cord and double cable release when taking photographs, improving operability. No shooting failures,
Reliability can be significantly increased.

Note that the present invention is not limited to the above embodiments. For example, the mounting position of the photoreflector 39 may be changed as appropriate, and a configuration may be adopted in which the reflecting mirror 22 is detected during the rotation of the reflecting mirror 22. Further, in the above embodiment, a photoreflector 39 is provided as a synchronizing signal generating means to optically detect the rotational movement of the reflecting mirror 22. However, as a synchronizing signal generating means, the reflecting mirror 22 is
It may be configured to detect the rotational movement of. Furthermore, it goes without saying that various other modifications may be made without departing from the scope of the invention.

As explained above, according to the present invention, when a camera is connected to the adapter body and a photograph is taken, the entire rotational movement of the camera's reflector from the observation position to the photographing position is detected. 10- Also, since the adapter body is equipped with a synchro signal generation means that generates all synchro signals when this rotational movement is detected, all the release movements of the camera are detected and all synchro signals are generated without using a synchro cord or double cable release. This can significantly improve operability and reliability.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention. Figure 1 is a perspective view of the entire body, Figure 2 is a schematic diagram of the overall configuration, Figure 3 is a perspective view of the camera, and Figure 4 is a diagram of the adapter body. It is a schematic block diagram. DESCRIPTION OF SYMBOLS 1... Endoscope, 4... Eyepiece part, 7... Adapter body, 8... Camera, 22... Reflector, 39...
Photoreflector (synchronized signal generation means). Applicant's agent Patent attorney Takehiko Suzue 11-

Claims (1)

[Claims] An eyepiece part of the endoscope is attached to one end of the adapter body, and a camera is detachably connected to the other end of the adapter body.n1 An endoscope camera that guides an observation image sent from the endoscope side to the camera side. In an adapter, when a camera equipped with a rotatable reflector from an observation position that guides the observation image toward the observation optical system side to a photography position that guides the observation image toward the film surface side is connected to the adapter body, all photography is performed. The adapter body is provided with synchronization signal generating means for detecting a rotational movement of the reflector of the camera from the observation position to the photographing position and generating a synchronization signal when the rotational movement of the reflector is detected. An endoscope camera adapter featuring: