SU1679623A1 - Optronic switch - Google Patents

Description

The invention relates to a pulse technique. The purpose of the invention is to miniaturize the switch and improve the display.

The switch includes a housing 1, on which is fixed a return spring 2 in the form of an L-shaped plate with flared 8. A key 5 of optically transparent material is fitted with a plate 5 with alphanumeric symbols, under which is placed a source of light radiation 6, illuminating it in the original and operating states of the switch. When n ?; Life on key 4, the horizontal plane 3 of the spring is tilted together with the flap 8, passing in the deepening 9 of the housing. At the same time, the light from the source 6, being reflected from the reflecting surface of the flange 8, hits the photodetector 10. The switch is activated. 1 hp f-ly, 3 ill.

7 to 9 10 Figure 1

1679623 A1

1679623

The invention relates to a pulse

technology and can be used in devices for processing and entering information in a computer, in the board, howl equipment.

The aim of the invention is to miniaturize the switch by reducing the height of the case and improving the display,

FIG. 1 shows an optoelectronic switch, a longitudinal section; in fig. 2 - the same, in the working position when acting on the key; in fig. 3 - spring return with flared (without a window in the plane of attachment to the housing and with a window in the plane of attachment to the housing and in the radius section).

The switch (Fig. 1) contains a housing

I, on which the return spring 2 is fixed in the form of an L-shaped plate made of a material with spring properties, for example steel 65G, beryllium bronze, etc. On the horizontal plane 3 return spring 2, the upper side of which has a reflective coating, the key is fixed 4 of the optically transparent material in which the plate 5 with alphanumeric symbols is installed, under the plate 5, in the key 4, a source of 6 light radiation is installed, the light from which propagates uniformly in different directions. Under the source 6 of the light radiation of the horizontal plane 3 of the spring, a window 7 is made, from one edge of which there is an inclined flange 8, the end of which is directed toward the body. The plane of the inclined flanging 8, the upper part of which is made with a reflective surface, overlaps the recess 9 in the housing 1.

A photodetector 10 is installed perpendicular to the axis of the recess in the case. In the return spring 2 (Fig. 36), a window can be made in its vertical plane with a transition to a radius surface

II, the dimensions of which, together with the spring thickness, determine the return force and depend on the key dimensions, the light source and the photodetector used, and on many other design and operational factors determined for each specific case.

The switch works as follows.

In the initial position (Fig. 1), the source of 6 light radiation is included. Its light, diffused in different directions, illuminates the plate 5 with alphanumeric symbols. Passing through the window 7, the light is reflected from the inclined flanging 8 and is scattered outside the housing 1. without falling on the photodetector

10. When pressing the key 4 (FIG. 2), the return spring 2 is bent, the horizontal plane 3 of the spring bends. Together with it, the inclined edge 8 deflects, while its end passes into the recess 9 of the housing 1, and the rays of the source of light 6, reflected from its reflecting surface, fall on the photodetector 10. The switch is activated. When removing the impact on the key, it returns to its original position, the oblique flange 8 overlaps the recess 9, the switch returns to its original state.

Claims (2)

Claim 1. Optoelectronic switch containing a movable key of optically transparent material, a plate with alphanumeric symbols of transparent material, a source of light radiation. a housing with a photodetector, a return spring, one end of which is fixed on the key, and the second is interconnected with the case, characterized in that, in order to miniaturize and improve the display, the return spring is made in the form of an L-shaped plate with a window in the middle part of the plane adjacent to the movable the key, one side of the window is made with an inclined flanging, the end of which is directed towards the recess in the body and overlaps it, the photodetector is installed perpendicular to the axis of the recess, the spring plane adjacent to the movable key e, and the flange formed with a reflecting surface, the light radiation source is installed in front of the movable key flanging with a reflective surface. 2. The switch according to claim 1, characterized in that the side surfaces of the keys are made optically opaque. 1679623 1 8 9 Yu Figure 2 Fig.Z