JPS6340007B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic relay. Conventionally, in this type of electromagnetic relay, as shown in Fig. 1, a pivot 2 is located on a straight line connecting the tip a of one armature plate 1a and the tip b of the other armature plate 1b, and the armature block A rotates. When this happens, the edges of both ends 3a and 3b of the yoke body 3 come into contact with the tips a and b of the armature plates 1a and 1b, respectively, but the shaft hole 4 is in contact with the armature block A.
If the armature plates 1a and 1b are deviated from the center, or due to variations in dimensions or warping of the armature plates 1a and 1b, the tip of the armature plate 1b may fall on the straight line connecting the tip a of the armature plate 1a and the pivot 2, as shown in FIG. If b is not located, one end 3b of the yoke body 3 is located as shown in the figure.
A gap x is formed between the edge of the armature block A and, for example, the tip b of the armature plate 1b, which changes the stroke and suction force of the armature block A, resulting in malfunction of the electromagnetic relay. Also,
As a countermeasure to the above-mentioned drawbacks, the present applicant proposed a long hole in the center of the base of the armature block in Japanese Utility Model Application Publication No. 50-5842, in order to be able to adjust even if the shaft hole is misaligned or the armature plate is warped. An electromagnetic relay was provided in which a shaft hole was formed and the shaft could be moved within the shaft hole. However, in this electromagnetic relay, the shaft hole was drilled long in the short direction of the armature block. If the spring force of the pair of movable contact plates or the suction force between the yoke body and the armature plate become unbalanced from side to side, the armature block has the drawback of moving to one side.

The present invention has been made in view of the above-mentioned drawbacks, and its purpose is to easily correct the misalignment between the armature plate and the yoke body caused by misalignment of the axis, dimensional error warpage of the armature plate, etc. To provide an electromagnetic relay capable of improving the contact state between an armature plate and a yoke body.

The present invention will be explained below with reference to Examples. FIG. 3 shows an exploded perspective view of one embodiment, in which two armature plates 1a and 1b are magnetized with different polarities by a permanent magnet 5, and the center portions of both are magnetized by a synthetic resin base 6.
The armature block A is constituted by this. Both amateur boards 1
Cards 7 molded from synthetic resin are provided on both sides of a and 1b. The yoke body 3 is formed in a U-shape, and an excitation coil is wound around a coil bobbin 8 provided in the central body, so that both ends 3a and 3b are magnetized with different polarities when the excitation coil is excited. A shaft hole drilled in the center of the base body 6 is rotatably inserted into a pivot shaft 2 protruding from the upper center surface of a separator 9 placed on top of the wound excitation coil, and both ends of the armature block A are Both ends 3a and 3b are inserted from below into the gap between the armature plates 1a and 1b (between opposing magnetic poles). 1 in the diagram
0 is a terminal block having a recess 11 in the center, into which an excitation coil with an armature block A placed on top is inserted. A plurality of terminal penetration holes 12 are bored on both sides of the recess 11, and each terminal penetration hole 12 has NC, NO.
A fixed contact plate 13 and a common terminal plate 14 are respectively inserted therethrough. Further, a terminal insertion hole 21 for inserting the coil terminal plate 15 is formed in the terminal block 10. 16 is a movable contact plate, and this movable contact plate 16
is driven by the card 7 to cause the movable contact 17 to open or contact the fixed contact 18. In the figure, 19 is a case, and 20 is a residial plate. By the way, in this embodiment, the shaft hole 4 drilled in the base 6 of the armature block A is constituted by a long hole that is long in the longitudinal direction of the armature block A, and the pivot shaft 2 inserted into the shaft hole 4 moves left and right inside the shaft hole 4. It is now possible to move to Therefore, even if the dimensions of the armature plates 1a and 1b change or there is warpage, by moving the armature block A from side to side, the yoke body 3 can be moved as shown in FIG.
The sides of both ends 3a and 3b of the armature plate 1a,
This means that it can be brought into contact with the tips a and b of 1b. Of course, the shaft hole 4 may be an elliptical long hole or a rectangular long hole.

The present invention is constructed as described above, and the shaft hole provided at the center of the base body is formed as a long hole extending in the longitudinal direction of the armature block, and the pivot shaft is inserted into this shaft hole so as to be movable left and right. Even if variations in plate dimensions or deviations such as warpage occur, by moving the armature block to the left or right, the fluctuations or deviations in dimensions due to warpage can be corrected, and both ends of the yoke body and the tip of the armature plate can be corrected by moving the armature block to the left or right. This type of electromagnetic relay can prevent arm strokes caused by gaps and changes in attraction force, and can eliminate malfunctions.Moreover, this type of electromagnetic relay uses the spring force of a pair of movable contact plates. In some cases, the suction force between the yoke body and the armature plate becomes unbalanced on the left and right, causing the armature block to easily move to one side. This prevents the armature block from moving in its lateral direction and creating a gap between the yoke body and the tip of the armature plate, and prevents rattling movement when the armature block rotates. This effect is achieved.

[Brief explanation of drawings]

1 and 2 are configuration explanatory diagrams of a conventional example, FIG. 3 is an exploded perspective view of an embodiment of the present invention, and FIG. 4 is an explanatory diagram of the use of the same. 3 is a pivot, 3 is a yoke body, 3a and 3b are both ends, 4 is a shaft hole, 5 is a permanent magnet, 6 is a base, and A is an amateur block.

Claims (1)

[Claims] 1 The center part of two parallel armature plates is connected by a base body, and the center of the armature block is magnetized with a permanent magnet so that both armature plates have different polarities from each other.The center of the armature block is rotatably supported horizontally. In electromagnetic relays, both ends of the yoke body are inserted from below into the gaps between the armature plates at both ends, and the armature block is rotated by magnetizing the yoke body with an excitation coil. An electromagnetic relay characterized in that it is formed with an elongated hole that is long in the longitudinal direction, and a pivot is inserted into the shaft hole so as to be movable left and right.