JPS5840722A - Electric contacting device magnetically operated - Google Patents

Abstract

1. An electric contact arrangement, to be operated magnetically, with two magnetically, electrically conductive contact springs forming a substantially closed magnetic circuit, each of which contact springs is fixed by one leg (4, 5) to an opposite side of an insulating spacer (6), and each connected to an electric terminal conductor (13, 14), and is opened or closed with elastic deformation depending on a magnetic field passing through them, characterised in that the contact springs consist of two U-shaped bent strips (1, 2) with their free ends inserted one in the other, and in that two legs (7, 8) belonging to different ones of the U-shaped bent contact springs, at least one of which is not fixed to the insulating spacer (6), lie alongside each other at a distance such that they touch or move apart with elastic deformation of at least one strip (1, 2), depending on the magnetisation of the magnetic circuit formed by the contact springs.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetically operated electrical contact device with an extensively closed magnetic circuit.

The object of the invention is to provide a contact device of this type which consists of a small number of parts and which can be manufactured particularly simply and with small dimensions.

Special C2 In this contact device, when iron, cobalt and nickel, or any of these as well as a non-metal such as boron or silicon, are contained in the alloy in an amount of 15 to 25 atoms, A band is used which consists of a highly amorphous alloy which can be obtained by quenching from the melt. Such materials are electrical conductors, have good soft-magnetic properties and are mechanically hard and therefore elastically deformable, so that they also have good spring properties.

Materials like this! A particularly advantageous electrical contact device according to the invention consists of two U-shaped bent bands in which the magnetic circuit is made of a soft magnetic material with good spring properties, the band being The two bands are mated on opposite sides, each band being connectable with a conducting wire, each arm of each band being attached to opposite sides of at least one insulating piece. and furthermore, the arms of each band, at least one of which is not connected to the insulating piece, are spaced apart, so that the arms elastically bind at least one band during magnetization of the magnetic circuit. This is obtained by closing the contact part with two twists.

FIG. 1 shows a contact device according to the invention, here configured as a relay. For this purpose, the two U-shaped bands 1 and 2 are fitted into each other and into the coil 3. The arm 4 of the band 1 is then attached to the lower side of the insulating piece 6, while the arm 5 of the band 2 is firmly connected to the upper side of the insulating piece 6. The remaining arms 7 and 8 of bands 1 and 2 C:
, contacts 9 and 1 made of a highly conductive and wearable material.
0. There is a gap between the arms of bands 1 and 2) and 8 when the coil 3 is not energized.

When the coil 3 is excited by the application of a DC or AC magnetic field, a magnetic flux is generated in the bands 1 and 2, and the arms 7 and 8 are arranged so that the contacts 9 and 1o are in contact and the bands 1 and 2 are electrically interchangeable. Suction until it connects to the Bands 1 and 2 are connected via connection points 11 and 12 with conductors 13 and 14, which constitute the 9-conductor for the electrical contact device.

In FIG. 2 again the bands 1 and 2 fit together on their upper surfaces and are provided with connection points 1 and 12 for connecting the conductors 13 and 14.

Unlike FIG. 1, the inner arms 4 and 8 are attached to both sides of the insulating piece 6. The upper arm 5 of the band 2 is fixed to the arm 4 of the band I - for example by attachment in the wall of the case 15. The case 15 has two notches 16i between the arms 4 and 5, and the disk-shaped permanent magnet 17 can be inserted into the notches C. This permanent magnet replaces the winding of the coil 3 of FIG. 1, so that the device can be used as a limit switch. Furthermore, it is also possible to pierce the band with individual magnetized sections 16, so that the contact device can be operated periodically. As in the embodiment according to FIG. 1, the magnetization causes an attractive force to appear between the arms 7 and 8. Of course, in the embodiment according to FIG. 2, only the arm 7 moves upwards until contact is made.

FIG. 3 shows an embodiment in which a contact device according to the invention can be used as a current sensor in an electrical cable. For this reason, the bands 1 and 2 are wrapped around the case with the internal hole 19 throughout the day. Through the internal bore 19 a conductor 20 or an electrical cable is inserted, the current of which produces a magnetic field in bands IM and 2 and a circuit of the contact device in the manner described above.

FIG. 4 shows an arrangement in which the contact device according to the invention acts as a DC relay with stationary contacts. Unlike FIG. 1, the arm portion 4 of the band 1 is not directly attached to the underside of the insulating piece 6, and there is a permanent magnet 21 between the arm portion 4 and the insulating piece 6. As a result, when the coil 3 has no current, the contacts 9 and 10 of the arms 7 and 8
touch each other. Current! As it flows down through the coil 3, depending on the current direction C2, the magnetic flux is strengthened or weakened in the magnetic circuit formed by bands 1 and 2.

Since bands 1 and 2 are mechanically biased in the position shown in FIG.
A constant direct current force obtained in the windings will break the established contact between contacts 9 and 10. As the DC current in the coil 3 increases further, the direction of the magnetic flux in the magnetic circuit reverses and the contact is created again. This device is therefore used to indicate whether the current in the coil 3 or in the inserted conductor corresponding to FIG. 3 adheres to a certain range or not.

The two devices are arranged side by side as shown in FIG. 4, with the direction of magnetization of the permanent magnet 21! When choosing differently,
and when both devices are provided with a common coil, a contact device with 2-) contacts is obtained, both of which are closed at low currents and one of which is related to the current direction. It opens when the current increases. The same thing is achieved when the magnetization directions of both permanent magnets 21 are equal and the currents in different directions flow through the inside of the refined magnetic circuit formed by the magnetic circuits 1 and 2.

[Brief explanation of drawings]

1 to 4 each show an embodiment of the present invention. 1.2...band, 3. -・Coil, 4I5
．． F, 8... Arm portion, 6... Insulating piece, 9.1
0...Contact point, 11.12...Connection point, 13,1
4.20...Conductor, 15.18...Case, 1
6...notch. 17.21...Permanent magnet, 19...Hole. tmlIf) Engraving (no change in content) FIG + FIG 2 FIG 3 FIG 4 1 Display of the case 3 Person making the amendment 6 The number of inventions that will increase due to the amendment τ

Claims (1)

[Claims] l) The magnetic circuit consists of two U-shaped bent bands +1.2) of soft magnetic material with good spring properties, which are fitted with their open sides. A conductor Wp t13, 14) can be connected to each band, and the respective ttl arms (4, 5) of each band (1, 2) are connected to each band.
or 7. ,．． 8) are attached to opposite sides of at least one insulating piece (6), and one arm (7) of each band is attached to the opposite sides of at least one insulating piece (6), and at least one of the bands is not connected to the insulating piece (6). . 2) A band ('l, 2) bent in a U-shape for magnetization of the magnetic circuit is connected to a coil (3) f2. The contact device according to claim 1, characterized in that the contact device is pressed in. 3) The U-shaped bands (1, 2) have a case (1, 2) having a hole passing through the inside of the band. 18], and the contact device according to claim 1, characterized in that the hole (19,) of the case is penetrated by all the conductors (20). 4) are fitted into each other The inner arms (4, 8) of the U-shaped bands (1, 2) are attached to the mutually opposing side surfaces (g) of the insulating piece (6), and the U-shaped bands (1, 2) are fitted together. , 2) is provided with a notch (16) between this inner arm (4) and the adjacent outer arm (5), in which a permanent magnet (17) is provided.
2. Contact device according to claim 1, characterized in that a permanent magnet and a contact device can be inserted, so that the device formed by the permanent magnet and the contact device can be used as a limit switch. 5) Arms of the U-shaped bands (1, 2) fitted together (
A permanent magnet (21) is placed between the surfaces of the insulating piece (6) to which this arm is attached, and a coil is placed around the mutually fitted bands (1, 2) to demagnetize the magnetic circuit. The arms (7, 8) of the interdigitated bands (1, 2), around which the coil (3) is wound and provided for contact, act as a permanent magnet (21) when the coil (3) is de-energized. Contacting devices according to claim 1, characterized in that they adhere to each other under bias by means of magnetic induction created by the contacting devices. 6) At least two contacting devices with permanent magnets (21) are common. 6. A contact device according to claim 5, characterized in that the contact device comprises a coil (3) having the following characteristics, and the magnetization directions of both permanent magnets are different from each other.