CS261354B1 - Connector for ferrite magnetic damper - Google Patents

Abstract

The ferrite magnetic flap coupling solves the problem of reducing the level of radio frequency interference in a simple way. This is achieved by galvanic connection of metal covers with the frame. The connection is ensured by the ferrite magnetic flap coupling, characterized in that the flexible sheet metal of rectangular shape is supported by the bent middle part against the pole piece of the flap magnet, while both extreme parts of the coupling are pressed against the device cover due to the flexibility of the coupling.

Description

BACKGROUND OF THE INVENTION The present invention relates to a coupling for a ferrite magnetic shutter used to attach covers.

Electronic devices increasingly contain circuits with micro-processors, pulse generators and pulse-controlled power supplies. In addition to the well-known advantages of using these circuits, tens of megahertz with steep pulse edges result in interfering signals. This generally wide spectrum of interference spreads across wires as well as through space as a disturbing electromagnetic field. This is unfavorable

Radio communication traffic is affected and the possibility of unwanted reception of information must also be taken into account.

Therefore, electronic devices must be suppressed. Advantages in the weight, volume and efficiency of today's electronic equipment are partially impaired by the cost of interference suppression.

Part of the measures to suppress the equipment is also galvanic interconnection of removable surface parts. Modified screw connections are used, usually in conjunction with single-purpose copper tapes, the parts of the covers that open are only grounded on the mounting side.

This method is expensive and due to unilateral grounding. disturbing stresses occur on these surfaces.

This disadvantage is remedied by a coupling for a ferrite magnetic shutter, characterized in that the central part of the rectangular sheet is bent at an angle of 20 to 40 degrees for contact with the pole piece of the magnetic shutter and both ends are bent at an angle of 70 to 100 degrees for galvanic connection. cover.

The advantage of the magnetic claw coupling is that, in conjunction with the magnetic claw, it not only fixes the housing to the device, but also electrically connects it.

261 354

Fig. 1 shows an exploded assembly of a clutch and a magnetic shutter; Fig. Z shows a particular embodiment of a clutch; Fig. 3 shows a variant of a clutch.

In FIG. 1, the actual damper 6 in the assembled state is supported by means of screws, washers and nuts of the central part against the coupling 1 which is pressed against its cover by its outer parts.

In a particular embodiment of the coupling of FIG. 2, a flexible, for example 0.1 to 0.3 mm, bronze sheet with good electrical conductivity is bent in the middle at an angle λ = 20 °. The outer parts are bent at an angle of -6 = 100 °. Another variant of the coupling, Fig. 3, has a bend of <= 40 ° in the middle, tfhel 6 = 70 ° · The outer parts are additionally bent at an angle = Z3 - Jr - 50 ° and provided with mounting holes with screws that connect the magnetic shutter to conductive cover.

Ferrite magnetic shutter couplings used to attach metal housings reduce the radiofrequency emission level in a simple and inexpensive manner.

Ferrite magnetic shutter couplings can be used wherever metal removable covers are used in equipment and at the same time the equipment needs to be suppressed.

Claims (2)

OBJECT OF THE INVENTION Ferrite magnetic claw coupling / characterized in that the central part of the rectangular shaped flexible plate (1) is bent at an angle = 20 to 40 ° for contact with the pole piece (2) of the magnetic claw and both ends are bent at an angle / 3 = 70 to 100 ° for galvanic connection with cover (3) · 2 drawings 261 354 Giant. of 261 354 Giant. 2