SU849325A1 - Contact-free change-over switch - Google Patents

Description

(54) CONTACTLESS SWITCH

I

This invention relates to electrical engineering; and, in particular, to input and output devices (control panels) ,; used in ACS and EVM.I

Non-contact switches are known, containing a set of one-type non-contact buttons, integrated into one design and having a common electromagnetic on / off fixation system 1J.

The use of such switchboards, widely used in control panels: ACS and computers, complicates electrical and wiring diagrams, since a large number of connecting wires are required not only for transmitting control signals, but also supplying power to each light source of a contactless button, Moreover, their caloric status is proportional to the number of buttons used in the myopia switch.

The closest are contactless switches containing a drum with code holes, rotatably mounted, a light source placed inside the drum, light-receivers, a spring-loaded button mounted on a base (2). i Known contactless switches. : DOES have limited functionality.

J The purpose of the invention is to expand the functionality. This goal is achieved by the fact that an | infinite switch, comprising: a drum with code holes, installed rotatably, a source of light located inside the drum, light receivers, a spring button mounted on the base, provided with light guides, other spring loaded Kiopkam and light-proof shields, spring-loaded buttons made of

 Translucent material, each lightproof screen is made with a hole, and the base is made with slots,

- light guides are arranged perpendicular to the axis of the drum shaft and installed on the base slots, all spring-loaded buttons are installed in rows and a base, and each fiber is inserted between the rows of spring-loaded buttons, each light receiver located opposite the fiber for the corresponding light permeable screen which is fixed on the button, and the light source is placed along the axis of the drum.

FIG. 1 schematically depicts a proximity switch; in fig. 2 - a pair of rows of spring-loaded buttons with a light guide between them; in fig. 3 - drum with code holes and a source of light; in fig. 4 - spring-loaded button and light guide.

The device includes a light source 1 installed inside the drum 2 with code holes 3, light-emitting diodes 4 of rectangular shape made of a transparent material (for example, organic glass) a row of buttons 5, pressed by springs 6, a light-tight screen is attached to each spring-loaded button 5 7 with an opening 8 for transmitting the light flux from the light guide 4 to the light receivers 9, in which photodiodes, phototrioids and photoresistances can be used. Above each light guide 4 in the base 10, slots 11 are made, which ensure continuous monitoring of the health of the light source 1 and signaling the activation of individual rows (registers) of spring-loaded buttons 5.

The operation of the device is as follows.

When the device is switched on, the luminous flux from the light source 1 is directed to those optical fibers 4, against which the code holes 3 of the reel 2 are located at a specific moment of time. Due to incomplete internal reflection in the optical fiber, the luminous flux is supplied through the side surfaces of the optical fiber to the opaque 7 spring-loaded screens buttons 5, located along the fiber, i.e., the push-button register is activated. At the same time, the luminous flux through the upper surface of the optical fiber is reflected in the slot 11 of the base 10, which ensures control of the operability of the light source and signaling the activation of the corresponding button register. When any button of the register is pressed, the hole 8 of the opaque screen 7 is tired between the side surface of the light guide 4 and the light receiver 9, while the light flux is also transmitted to the button body, creating a glow of the button face, i.e., inducing it to turn on. Under the influence of light in the light-receiving device 9, a control signal is generated, i.e., the pressed button is switched on. Likewise, any button of the enabled register of the contactless switch is turned on. The control of the inclusion of knochny registers is carried out by discrete movement (rotation) of the drum 2 around the axis of the light source 1, and this rotation can be achieved by using, for example, pulsmotors, stepper motors, etc., widely used in practice.

Claims (2)

Invention Formula A contactless switch comprising a drum with code holes, mounted rotatably, a light source placed inside the drum, light-receivers, a spring-loaded button mounted on the base, characterized in that, in order to expand 5 features, it is provided with light guides, other spring-loaded buttons and light-proof screens, spring-loaded buttons are made of a transparent material, each light-tight screen is made with a hole, and the base is made with slots, the light guide is arranged perpendicular to the axis of rotation of the drum and installed opposite the base slots, all spring-loaded buttons are installed in rows on the base, and each light guide is inserted between a pair of rows of spring-loaded buttons, with each light receiver p zmeschen in front of the light guide for the respective opaque screen, which is attached to the button, and the light source is placed 0 along the axis of the drum. Sources of information taken into account during the examination 1. Application No. 2684695 / 24-07, cl. H 01 H 13/64, 1978. , 2. USSR author's certificate No. 599290, cl. H 01 H 13/64, 1976.