JPH0216529U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a plan view of a specific example of the transmission type optical path opening/closing means of the switch of the present invention, Fig. 2 is a plan view of the specific example of Fig. 1 with the push button of the switch pressed down, and Fig. 3 is a plan view of the specific example of the transmissive optical path opening/closing means of the switch of the present invention. FIG. 4 is a partial plan view of the specific example of the reflective optical path opening/closing means of the switch, FIG. 4 is a partial plan view of the specific example of FIG. FIG. 6 is a partial plan view of a specific example of the transmission prism type optical path opening/closing means shown in FIG. 5, and FIG. 6 is a partial plan view of the specific example of FIG.

Claims (1)

[Claims for Utility Model Registration] 1. A light source, an optical fiber that guides light from the light source to an optical path opening/closing means, and the same or one or more of the above for guiding light reflected by or passing through the optical path opening/closing means to a phototransistor. another optical fiber; and the phototransistor for receiving light and passing current from the same or another optical fiber. 2. The optical path opening/closing means includes a prism that changes the direction of the light from one optical fiber by 180 degrees and enters the other optical fiber, and a prism that moves at right angles to the optical path so as to freely open and close the optical path in front of the other optical fiber. It usually consists of a shutter offset to transmit light and a push button connected to the shutter, or it reflects light from a single optical fiber.
A mirror that allows light to enter the same optical fiber by changing its direction by 80 degrees, a support that moves the mirror in a direction perpendicular to the optical path to prevent reflection, and is connected to the support. Or, in the normal position, the light from the first optical fiber changes direction by 180 degrees and enters the second optical fiber, and in the moved position, the light from the first optical fiber changes direction by 180 degrees. a prism whose direction is changed so as to be incident on a third optical fiber; a support for the prism which is normally biased to the normal position and which can be moved from the normal position to the movement position by pressing a push button;
The electric switch according to claim 1, which is comprised of the push button connected to the support.