SU736199A1 - Contact-free coding change-over switch - Google Patents

Description

I

The invention relates to contactless switching technology and can be applied to devices for processing and entering information in computers, in telemetry systems, as well as in all areas of industry where software control of production processes is used.

Known contactless coding switches operating on galvano-magnetic effect 1.

These devices have complex, metal-intensive structures, low-tech in production.

The closest in their own. The technical entity is a coding switch that contains an insulating body, a rotating limb of insulating material, in a cylindrical cavity of which insulating rings are rigidly fixed with coding tracks made on the inner surface of the latter in the form of grooves and projections of various types. lengths A magnetic system comprising a stationary permanent magnet in the form of a square plate fixed in the housing with

INSULATION washer, magnetic conductor plates fixed on opposite ends (poles) of a magnet. At the short ends of these plates, four rocker arms made of a magnetically conducting material are hinged. The magnetic components are fixed on the magnetically conductive plates close to the magnet poles and opposite the ends of the long arm of the rocker arms. For turning the rocker arms, the design provides impacting rollers that are freely placed in the windows of the insulation washer and lies on the curved, short ends of the arm. Moreover, the rollers are opposite coding tracks (grooves,

15 ledges) insulating rings 2.

The main disadvantage of this switch should be its constructive complexity. The magnetic system includes a number of metal parts, including movable rocker arms.

Claims (2)

20 In addition, there are rollers in the switch design that, when turning the dial, move in the windows of an insulating washer and act on the rocker arms. Progressive downward movement of the rollers is reported by coding tracks (protrusions); the return movement of the rollers is obtained due to the attraction of the long ends of the rocker arms to the magnet pole. Large metal capacitance increases the weight, and the slightest moving pairs are: coding rollers; rollers; The rocker arms are magnetically conducting plates that reduce the durability of the switch operation. The purpose of the invention is to simplify the construction. And increase the reliability of the switch operation is achieved by using a permanent magnet, a magnetic sensitive element with screens placed on an insulated flat disk, encoding tracks located in a contactless coding switch that contains a rotary isolating limb with coding tracks In the form of alternating magnetic and insulating arcuate sections of various lengths placed on the end surface of the limb, the magnetic sections are magnetized in directions limb axis, and the screens are made in the form of magnetically conducting plates, the magnetically sensitive Hbie elements being placed between the magnetically conducting plates of the screens opposite the corresponding coding tracks. FIG. G shows a general view of the described switch; in fig. 2 - a limb with coding tracks made in a vvde arc-shaped, alternating with grooves of permanent magnets; in fig. 3 shows an embodiment of a switch with a limb containing a permanent magnet in the form of a disk with arcuate grooves forming coding tracks; in fig; 4 is a permanent magnet in the form of a disk with arcuate grooves. The contactless coding switch comprises a housing 1 in which a rotary insulating limb 2 is placed, on the end surface of which coding tracks are made in the form of alternating magnetic and insulating arcuate portions of various lengths. The coding tracks can be made in the form of arcuate alternating with the grooves of 3 permanent magnets 4 of various lengths (phi-1. 2), or in the form of a permanent magnet in the form of a disk 5 with arcuate grooves 6 (Fig. 4). The permanent magnets 4 and 5 of the coding tracks are magnetized in the direction of the axis of the limb and are oriented with the same poles to the end surface of the limb 2 In the housing 1 of the switch there are also screens made in the form of magnetically conducting plates 7 located on the insulating disc 8 Both storuns from the magnetically / secured elements 9, located opposite to the corresponding coding tracks. The described switch for battery sledun) is an image of it. By turning dial 2, it encodes the digits of the decimal number. Coding lanes rotate with limb. Each new position of limb 2, corresponding to a digit of a tenth of a row, is fixed in the housing 1 by mechanical means and is observed visually. When this happens, the magnetic flux is irradiated with a specific code combination of the magnetically sensitive elements 9 corresponding to this digit of the decimal row. Magnetic elements control the electrical circuit, the output of which produces the code of the corresponding digit in its binary representation. At the zero position of the limb in the first version of the design, the magnetically sensitive elements (Hall sensors) are not in the state irradiated by the magnetic flux. According to the second embodiment, the zero position of the limb corresponds to the irradiated state of the Hall sensors. The use of Hall sensors with high sensitivity to weak magnetic fields made it possible to eliminate a closed magnetic system including a permanent magnet with a magnetic core. In this case, the Hall sensors are irradiated directly by a magnet. Orientation of the magnets with like poles is necessary to eliminate the mutual closure of the fields of the magnets. Screens in the form of magnetic conductor strips are necessary in the design to exclude the irradiation of Hall sensors by adjacent coding tracks. Invention Non-contact coding switch containing a rotating insulating limb with coding tracks placed in a housing, a STANDING magnet, a magnetically sensitive element with screens placed on an insulating disk, in order to simplify the design and increase the reliability of the switch, encoding the tracks performed) 1-1,1,1 and the form of alternating magnetic and July arrays of different lengths. PJ; massed on the end surface of the limb, with the magnetic sections magnetized to the HJ direction of the axis of the limb, and the screens are made to wake the magnetically conducting plates, and the magnetic sensitive elements are placed in the MSA-CH 57361946 the magnetic circuit ischmi plates of screens-}. US Patent No. 3568180, cl. 340-347, against the corresponding coding tracks. 1971. Information sources, 2. US Patent No. 3626349, cl. 338-32, taken into account in the examination of 1971 (prototype). 12 7378 Fig.)