JPS596458B2 - lead relay - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a terminal arrangement of a polarized reed relay.

Conventionally, in this type of reed relay, both ends of a reed piece having a movable contact are located on opposite sides of the coil, so the common terminal is placed close to the control terminal (coil terminal). The drawback was that the insulation strength between the control side and the controlled side could not be increased.

The present invention aims to solve the above problems.

The following description will be given with reference to embodiment figures. In FIGS. 1 and 2, a case 1 consists of a base 2 and a case cover 3, and houses a coil frame 5 around which a coil 4 is wound.

A lead piece 6 is inserted into the hollow part of the coil frame 5, and at the free end of the lead piece 6, a normally open contact plate T made of a magnetic material and a normally closed contact plate 8 are arranged facing each other on the upper and lower sides, and a normally open contact terminal plate 9 A permanent magnet 11 is disposed between the contact plate 1.8 and the normally closed contact terminal plate 10, and a magnetic path is formed by both contact plates 1.8 and both terminal plates 9 and 10.

Figure 1 shows a permanent magnet connected to a normally closed terminal plate 1 to make it monostable.
It is shifted toward the 0 side.

In such a polarized reed relay, the common terminal plate 13
The middle part of the lead piece 6 is embedded in a synthetic resin coil frame 5 and protrudes from one end of the coil frame 5, and the fixed end of the lead piece 6 is fixed to this end 11, and the other end of the common terminal plate 13 is fixed. By making the side protrude downward from the other end of the coil frame 5, the common terminal 13 protruding from the lower surface of the case 1 can be arranged near the contact terminals 8, 90, and the controlled terminal groups 8, 9, 13 are gathered on the left side of the figure, and the position of the coil terminal 14, which is a control terminal, can be freely selected depending on the winding method of the coil, so the control terminal group 14 can be gathered on the right side, and the arrangement of each terminal can be controlled in this way. They can be grouped into a terminal group and a controlled terminal group.

Next, the operation of the present invention will be explained with reference to FIGS. 1 and 2.

For example, if the permanent magnet 11 is magnetized as shown in Figure 1 while no current is flowing through the coil 4, the normally closed contact plate 8 will become the S pole and the normally open contact plate 7 will become the N pole. However,
Due to the asymmetrical position of the permanent magnets, the magnetic flux passing through the normally closed contact plate 8 is greater than the magnetic flux passing through the normally open contact plate 7, and therefore the free end of the lead piece 6 is attracted to and comes into contact with the normally closed contact plate 8. However, the normally closed terminal 9 and the common terminal 13 are electrically connected.

Next, when an excitation current is applied to the coil 4 in the direction of the free end of the lead piece 6 or the south pole, the lead piece 6 reverses and attracts the normally open contact plate 7, until the current in the coil 4 is cut off. It will remain in that state.

When the current in the coil is cut off, the reed piece 6 is again attracted to the normally closed contact plate 8 by the permanent magnet and returns to its original state.

In this way, FIG. 1 constitutes a monostable relay.

In FIG. 1, if the north pole of the permanent magnet 11 is extended upward and both poles are brought into contact with both terminal plates 9 and 10, a bistable relay can be constructed.

In this way, the magnetic flux of both contact plates 7.8 will be the same, so the lead piece 6 will be attracted to one of the contact plates depending on the direction of the excitation current of the coil 4, and even if the excitation current is cut off, the reed piece 6 will be attracted to one of the contact plates. It remains in that state until an excitation current in the same direction is applied.

Conventionally, this type of reed relay has a configuration in which a lead piece with a movable contact is inserted through the coil, and both ends of the lead piece are located on opposite sides of the coil, so that the common terminal is separated from the contact terminal. However, there was a drawback that the coil terminal group on the control side and the contact terminal group on the controlled side could not be arranged separately, and the insulation strength between the control side and the controlled side could not be increased. According to the present invention, as described above, by embedding and molding the common terminal board in the synthetic resin coil frame, it is possible to make it protrude toward the contact side, and therefore, the group of controlled terminals can be grouped together on one side of the bottom surface of the case. In addition, since the coil winding can be drawn out at any point, the coil terminals can be grouped together on one side and the insulation strength between the control side and the controlled side can be increased.

Further, according to the present invention, the strength of the coil frame can be increased by embedding the common terminal plate as described above.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the same. 1...Case, 5...Coil frame, 6.
...Lead piece, 1...Normally open contact plate, 8.
...Normally closed contact board, 9...Normally open contact terminal board, 10...Normally closed contact terminal board, 11...
Permanent magnet, 13... Common terminal board.

Claims (1)

[Claims] 1. Insert a lead piece made of magnetic material into the coil housed in the case, and magnetize the normally open contact plate and normally closed contact plate made of magnetic material, which are arranged oppositely above and below the free end of the lead piece, with a permanent magnet. In the polarized reed relay, the intermediate part is embedded in a synthetic resin coil frame, and the other end of the common terminal plate is fixed to the fixed end of the lead piece on one end side of the coil frame. A reed relay characterized in that the arrangement of each terminal plate protruding from the lower surface of the case is divided into a control terminal group and a controlled terminal group by protruding from the other end of the coil frame.