SU782008A1 - Change-over switch - Google Patents

Description

(54) SWITCH This invention relates to the radio industry and is intended for use in small-sized equipment for switching low-voltage electrical circuits. Switches are known that contain movable contacts in the form of rollers or balls, designed to close stationary contact elements, and clamps necessary to hold the contacts in a closed position p. Also known is a switch comprising a stator on which at least two pairs of fixed contacts are installed, a rotor with at least one moving contact mounted on it and a locking element 2. However, a mechanical, electrical, or some other external actuator is required to activate known switches, which complicates the device in which the switch is installed. The purpose of the invention is to provide switching without mechanical efforts. The goal is achieved by the fact that in a known switch.

.V., - containing a stator, in which at least two pairs of fixed contacts are installed, a rotor with at least one movable contact and a fixing element installed on it, permanent magnets are introduced according to the number of pairs of fixed contacts, fixed on the stator by longitudinal axes parallel to each other and oriented in pairs in opposite directions in one direction, the fixed contacts are made in the form of pole pieces located on the poles of permanent magnets facing the moving contact, and The movable contacts are made in the form of tubular rollers of magnetic material, and in the initial state, the movable contacts close the pairs of fixed contacts and are displaced relative to the open pairs of fixed contacts by a distance that ensures their switching. FIG. 1 shows a switch, 1 cut A-A in FIG. 2; FIG. 2 shows a switch, a section BB in FIG. 1. The switch can be made both with linear movement of moving contacts, and with rotary.

The switch is rotated by moving the movable contacts (more simple constructively and technologically advanced in manufacturing) - it has a housing 1 with fixed magnets 2 fixed therein, oppositely opposed poles opposite each other, the pole tips of which are fixed contacts 3, and a sleeve 4, in which the bearing 5 is mounted, the cover b with an insulating gasket 7 and a ball bearing 8, rolled in it, an axis 9 with a hole for the locking pin, on which the disk 10 with pa- is fixed; you. In these paeax there are sub-contacts 11 in the form of tubular rollers made of magnet of a flexible material, having a galvanic pokry1Tyo D

reduced electrical resistance (e.g. silver plating). The same coating has fixed contacts.

The housing 1 and the key -b are fastened together by a sleeve 12, screwed into the sleeve 13, fixed in the case.

In the initial STATE, the pairs of fixed contacts are in the closed state, and some are open, in open pairs, base, and the contacts 11 are shifted relative to the lightly fixed contacts 3 by a distance not exceeding the radius of the permanent magnets of these 2 pairs fixed contacts. At the same time, the sum of the attractive forces of magnetically coupled gthars of the immobile contacts is less than the sum of the attractive forces of open-pair magnets. This is an inequality of forces. The magnetism in the switch is ensured by the fact that the Fisclo open pairs are larger than those closed with completely identical permanent magnets in all pairs of fixed contacts, and with the same number. closed and open pairs by the fact that permanent. magnets in open POTS pairs or larger dimensions, greater than the magnetic energy, than magnets in closed pairs of contacts. A switch having one pjr of fixed contacts and one movable contact turns into off-load, closing ONE open contact.

The switch works as follows.

In the initial state, the axis 9 s behind the disk with the captive disk 10 and the movable contacts 11- (tubular roller) / {located in the grooves of the disk is held by a locking element, for example with a pin (not shown) inserted into the hole of the axis

782008

9. When released, the axis 9 under the action of the difference between the attractive forces of the magnets of open and closed pairs of fixed contacts, and also as a result of the fact that the moving contacts 11 in open pairs are sumen relative to the fixed contacts 3, rotates in the direction of open contacts (shown by arrow) and occupies such a position in which closed contacts are open and open contacts closed. In this position, the axle is held by the action of the forces of attraction of the gn.trv on the movable arms, while ensuring reliable electrical contact in a pair of roller (sub-contact) -. sweat lugs (fixed contact).

Thus, in the switch, an external LED drive providing contact switching is replaced by the force of attraction of the permanent magnets placed inside the switch, which simplifies the design of the device in which the switch is mounted.

Claims (2)

1. US patent W 3792210, Cl. H 01 H 3/16, 1974. 2. USSR author's editorship No. 136806, Cl. H 01 H 21/66, 1960 (prototype). P w A Fig-2