JPS6211857B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endoscope switch opening/closing device with an improved contact structure.

Generally, the synchronization contact on the endoscope side is exposed on the surface of the eyepiece of the operation part, and when the camera is attached to the eyepiece of the endoscope, it is connected to the contact on the camera side. ing.

However, since the synchro contacts on the endoscope side are exposed on the surface of the eyepiece, when the endoscope is sterilized with a chemical solution, the exposed synchro contacts corrode and are likely to cause poor conduction.

The present invention has been made focusing on the above circumstances,
The purpose is to provide a switch opening/closing device for an endoscope that will not corrode even if the endoscope is immersed in a chemical solution for disinfection.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

Reference numeral 1 in FIG. 1 is an endoscope eyepiece, and a main body 2 of the endoscope eyepiece 1 is formed into a cylindrical shape, and a lens barrel 4 of a camera 3 is fitted onto the outer periphery of the main body 2. It is designed to be detachably connected. Further, the endoscope eyepiece section 1 has an eyepiece lens 5 installed inside thereof, and is optically connected to a photographing optical system 6 on the camera 3 side. Further, a synchronizing contact 7 is built into the endoscope eyepiece section 1 and located on the side of the eyepiece lenses 5. That is, the synchro contact 7 is shielded from the outside by a transparent elastic membrane 9 stretched inside the front opening 8 of the main body 2 as a waterproof means. Thus, the synchronization contact 7 is installed in the endoscope eyepiece 1 in an airtight manner. Note that the front surfaces of the eyepieces 5 are covered with an elastic film 9, but since the elastic film 9 is transparent, it does not cause optical problems.

Further, the synchro contact 7 has a fixed side contact 10.
and a movable contact 11, the movable contact 11 is urged toward the elastic membrane 9 by a contact spring 12,
It is configured to move forward elastically and wait in a state away from the fixed side contact 10. Then, the movable contact 11 is pushed through the elastic membrane 9 as a waterproof means by the operation mechanism 13 on the camera 3 side, which will be described later, and is pressed against the fixed contact 10 to contact the synchronization contact 7.
It has become possible to close the

The operating mechanism 13 on the camera 3 side is, for example, a movable mirror 14 in a single-lens reflex camera.
It is configured to be driven by. That is, a push rod 15 is provided that can move forward in the axial direction of the lens barrel 4, and the push rod 15 is pushed forward by a cam 16. It is biased in the direction of retreat. Further, the cam 16 also has a separate return spring 18.
The push rod 15 is urged in the retracting direction by
It is waiting at the cam stopper 19. When the movable mirror 14 rotates in conjunction with the shutter release operation and jumps up from the state shown in FIG. 1 to the state shown in FIG. 2, the cam 16 is moved.

Note that 20 is a film installed inside the camera 3.

Next, the operation of the switch opening/closing device will be explained.

First, when the shutter button (not shown) of the camera 3 is pressed, the movable mirror 14 jumps up from the state shown in FIG. 1 to the state shown in FIG. As shown in Figure 2, it is moved to the right against the restoring force of the return spring 18. As a result, the push rod 15 is pushed up by the cam surface of the cam 16 and projected toward the endoscope eyepiece section 1 side.
Since the tip of the push rod 15 hits the elastic membrane 9 and pushes that part, the movable contact 11 of the synchro contact 7 can be pushed through the elastic membrane 9. As a result, as shown in FIG. 2, the movable contact 11 comes into contact with the fixed contact 10, and the synchro contact 7 is brought into a closed state. Therefore, a photographing illumination lamp (not shown) on the endoscope side can be turned on to take a photograph. The illumination lamp may be built into the end of the endoscope or provided in the light source device. Furthermore, since the elastic film 9 is transparent as described above, the light image can be transmitted through the film 20 without being blocked and can be photographed.

On the other hand, when the movable mirror 14 returns, the return spring 1
8, the cam 16 returns to the position of the cam stopper 19, and the push rod 15 also returns to the position of the return spring 1.
8, the elastic membrane 9 becomes flat, and the movable contact 11 returns due to the contact spring 12, leaving the fixed contact 10 and the synchro contact 7 in an open state.

According to the embodiment described above, the synchronizing contact 7 can be operated by the operating mechanism 13 on the camera 3 side while being sealed inside the endoscope eyepiece 1. Therefore, even when the endoscope is sterilized with a chemical solution, the synchronizing contact 7 will not be corroded by the chemical solution.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and may be, for example, as shown in FIG. 3 or 4. In the embodiment shown in FIG. 3, the eyepiece lens 5 is exposed as it is, and the synchronization contact 7
The elastic membrane 21 is provided only in the portion facing the . The elastic membrane 21 in this case does not necessarily have to be transparent. Further, even in the case of the above embodiment, only the portion facing the eyepiece 5 may be made transparent without making the entire elastic film 9 transparent.

Furthermore, in the embodiment shown in FIG. 4, instead of the elastic membrane 21 in the embodiment shown in FIG.
2 is provided so that it can be moved forward and backward. The contact operating rod 22 is fitted with an O-ring 23 so that it can move airtightly.

As explained above, in the present invention, since the synchronizing contacts on the endoscope side are not exposed to the outside, the synchronizing contacts are not corroded during chemical disinfection. Therefore, without causing conduction failure,
Stable and good connection status can be obtained over a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of essential parts showing a first embodiment of the present invention, FIG. 2 is a sectional view of the operating state of the same embodiment, and FIGS. FIG. 3 is a sectional view of main parts showing an example. DESCRIPTION OF SYMBOLS 1... Endoscope eyepiece, 2... Main body, 3... Camera, 4... Lens barrel, 5... Eyepiece, 6... Photographing optical system, 7... Synchronization contact, 8... Front opening Part, 9... Elastic membrane, 10... Fixed side contact, 11...
...Movable side contact, 12...Contact spring, 13...Operation mechanism, 14...Movable mirror, 15...Push rod,
16... cam, 17... return spring, 18... return spring, 19... cam stopper, 20... film, 21... elastic membrane, 22... contact operating rod,
22...O-ring.

Claims (1)

[Claims] 1. An eyepiece section with an eyepiece provided therein, and an external operation member that mechanically moves in conjunction with the release operation of the external imaging device when the external imaging device is attached to the eyepiece section. a synchronizing contact located in the eyepiece and opened and closed by mechanical movement of the external operating member via a waterproof means to be described later; and a synchronizing contact that transmits the movement of the external operating member to the synchronizing contact. 1. A switch opening/closing device for an endoscope, characterized in that the device is configured to close a contact and includes waterproofing means for waterproofing at least the synchronizing contact within the eyepiece.