SU1203611A1 - Static switch - Google Patents

Description

The invention relates to electrical engineering, is intended for switching electrical circuits, and can be used in computing, telegraphy, hardware, instrument making as a device for manual input of information.

The purpose of the invention is to increase the reliability of switching.

The drawing shows a contactless switch, a longitudinal section.

The proximity switch comprises a housing 1 in which a permanent magnet 2 is located, which is connected to the key 3 by means of a slider 4. In the case 1, there is a fixed magnetic pipe 5, made of ferromagnetic material; 1a, consisting of plates of magnetically soft material located parallel to the surface of the poles of a permanent magnet 2.

At least one of the plates of magnetically soft material is made of two sections 6 and 7 (an embodiment is shown in which both plates consist of two sections). The upper part of the magnetic material magnet plate of section 6 of the magnet 5 is located at the pole of magnet 2 and its length B is chosen equal to the stroke of the key L to 2 mm from the hot position to Mo.Meirra of the magnetically sensitive element (B t

 mm full keystroke), and the second

The part 7 of the specified part of the magnetic material M1H01CH material is removed from the first section in the direction perpendicular to the redmagnetization of the permanent magnetite by the thickness of the magnetic sensitive element 8 installed on the surface of the specified section 7 of the magnetic material plate .

The proximity switch works as follows.

B isho; The position of the magnetic switch iK ToK of the permanent magnet 2 closes the magnetic conductor 5, forming a closed magnetic system. At the same time, the magnetic interaction of a permanent magnet with 2 s; 10 transverse components is yupgey of magpate duct 5 and with nepx iHMn parts 6 of its longitudinal ii.iac type ensures reliable retention of the movable part of the switch to its original position. In this position, the crossover, the 1st magnet, the magneto-controlled element 8 is practically out of action of the small magnetite magnetite flux 2, and the propagation of the magnetized 1t fields is scattered to the external editor O. Golovach Order 8425/56

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Compiled by M. Teh.I.I. Veres Circulation 678

VNIIPI State Committee of the USSR

for inventions and discoveries 113035, Moscow, F - 35, Rau1lska nab., 4/5 Branch PPP "Patent, Uzhtorod, ul. Design,

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n 5

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, five

L-transtvo is minimized, eliminating the p. Th most undesirable effects on neighboring devices.

When pressing the key 3, the permanent magnet 2 together with the slider 4 moves) along the switch axis in the directions of the lower ones (not shown) of the housing 1. At the same time, there is no resistance, key 3, as the magnet 2 leaves the area The arrangement of the upper parts 6 of the plates of the magnetic conductor 5 gradually increases and reaches a maximum value in the position of the passage of the upper plane of the magnet 2 of the lower ends of the upper parts 6 of the magnetothermal plates. Upon further movement of the magnet 2, the direction of the magnetic flux closure from the upper parts 6 of the plate of the magnet duct 5 to the lower parts 7 occurs. At the same time, due to the distance of the lower parts 7 of the plates from the upper parts 6, a certain distance increases. gaps by closing the magnetic flux, which leads to a sharp drop in the resistance to movement of the key 3. In this part of the key travel there is an abrupt change in the magnetic field. uktsii acting on the magnetically element 8 m. e. there is an operation pereklyuchate.ch.

At this m, the change in the magnitude of the resistance to movement of the clap and causes the operator to have a tactile sensitivity. The meter can trigger the switch.

In the position of maximum displacement- and clavinly 3, a permanent magnet 2, located in the lower limiting 1olog. is shielded by the lower parts of the 7 plates of the magnetic circuit 5, closing its magnetic fields, which, in this position of the switch, also distributes the propagation of the magnetic fields in the outer space.

After removing the force pressing the key 3, the movable part of the switch is due to the magnetic interaction of the permanent magnetite 2 with the lower parts of the 7 plates of the magnetic circuit 5 located in the zone of propagation of the magnetic field, and then due to the interaction of the magnet 2 with the top-; The parts of the 6 plates of the magnetic circuit 5 and the transverse component of each plate are returned to their original position.

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Claims (1)

Non-contact switch comprising a housing, a key associated with a permanent magnet, a magnetically sensitive element and a magnetic circuit with plates of soft magnetic material arranged so that at least their sections are parallel to the end surface of the poles of the permanent magnet, the size of the plates of soft magnetic material in the direction of movement of the permanent magnet is selected less than the magnitude of the maximum displacement of the permanent magnet, characterized in that, in order to increase the reliability of switching, on the edge at least one of the plates of soft magnetic material is made of two sections connected to each other, and the length of the section located directly at the end surface of the magnet pole is selected to be equal to the section of the key travel from the initial position to the moment the magnetically sensitive element is triggered, and the second section of this plate is made of soft magnetic material is removed from the first portion in a direction perpendicular to the direction of movement of the permanent magnet by the thickness of the magnetically sensitive element, and the gnositosensitive element is installed on the inner surface of the second section of the plate of soft magnetic material.