JPH0747778Y2 - Polarized relay - Google Patents

Description

[Technical Field] The present invention relates to a polarized relay, and more particularly to a polarized relay in which an armature is swingably arranged with its central portion as a fulcrum.

[Background technology]

Generally, in this type of polarized relay in which the armature is swingably arranged with its center as a fulcrum, mechanical stress from the outside, such as shock or vibration applied during transportation or handling, causes the armature block to move. It greatly affects the supporting piece spring part,
Since there were problems such as spring deformation that changed the characteristics and deteriorated the performance, as shown in FIG. 4, a projection provided opposite the intermediate portion 55a of the support piece 55 supporting the armature block to the inner surface of the cover. Although the support piece 55 is prevented from being deformed by forming 16, the size of the gap G between the protrusion 16 and the support piece intermediate portion 55a is difficult to set to a required value due to manufacturing variations. There was a problem that the deformation preventing effect of 55 was not sufficiently obtained.

[Purpose of device]

In view of the above circumstances, the present invention provides a polar relay having stable characteristics without deformation of the armature block support piece.

[Disclosure of device]

According to the present invention, a coil block in which a coil is wound around an iron core formed in a substantially U-shape, and both ends corresponding to the magnetic poles interposed between the magnetic poles of the iron core are magnetized to have the same pole. An armature having a magnet piece whose central portion is magnetized with different polarities, and an armature whose both ends face both magnetic poles of an iron core and whose central portion is swingably supported by the central portion of the magnet piece. The block is housed in a casing composed of a base and a cover, and the armature is integrally provided with a pair of movable contact spring pieces that are long in the direction of connecting the magnetic poles of the iron core. A polarized relay in which a support piece is provided at a position corresponding to the pivotal support portion so as to integrally project in a direction orthogonal to the longitudinal direction of the movable contact spring piece and to be locked in a recess formed in the casing. To the inner surface, a facing part that is installed facing the middle part of the support piece A protrusion having an abutting portion that abuts the fixed portion of the support piece is formed, whereby a relay having stable characteristics without deformation of the armature block support portion is configured. To do.

An embodiment of the present invention will be described below with reference to the drawings. First
In FIG. 2 and FIG. 2, 1 is a casing, such as synthetic resin,
It is composed of a base 11 made of an insulating material and a cover 12 fitted so as to cover the outer side wall of the base 11. Inside the casing 1, a coil block 3, a magnet piece 4, and an armature block 5 are provided.
And are provided.

The base 11 has a box-like shape that opens upward, and forms walls 14 to which fixed contact plates 24 having fixed contacts 23 are fixed at four inner corners, and the contacts are integrally formed by a conductive plate. Piece 21 and common terminal piece 22, fixed contact plate 24 and fixed terminal piece 2
5, and the coil terminal coupling piece 26 and the coil terminal piece 27 are integrally formed by insert molding.

Like the base 11, the cover 12 is made of an insulating material such as synthetic resin and has a box-like shape that opens downward, and a protrusion 16 is provided so as to project downward from the inner peripheral surface of the upper wall thereof. Protrusion 16
Is located on a support piece 55 described later, and an opposing portion 16a that is provided opposite to the intermediate portion 55a, and an abutment portion 16b that abuts the upper surface of an attachment portion 55b to which the support piece 55 is attached to the contact piece 21. Have.

The coil block 3 is a substantially U-shaped iron core opened upward.
The coil 32 is wound around a horizontal piece of 31, a coil terminal 34, which is the end of the coil 32, and a coil terminal piece 27 connected to the coil terminal 34 via a coil terminal coupling piece 26.

The magnet piece 4 is plate-shaped, and a groove 41 having a substantially semicircular cross section and running in the width direction of the base 11 is formed in the center of the upper surface. The upper surface of the magnet piece 4 is an inclined surface 42 that is inclined so that the central portion in the longitudinal direction of the base 11 has the largest thickness and the thickness gradually decreases toward the ends. Also the base
Both ends of the magnet piece 4 in the longitudinal direction of 11 are magnetized to the same pole, and the central part is magnetized to a different magnetic pole.

As shown in FIG. 3, the armature block 5 is made of a magnetic material and is formed in the shape of a substantially rectangular flat plate. The armature 51 is movable on both sides of the armature 51 in the width direction. It is composed of a contact spring piece 52 and a spring support body 53 which is integrally formed with the armature 51 and the movable contact spring piece 52 and is a molded product of an insulating material such as synthetic resin. A support piece 55 having a substantially T-shaped tip is integrally projectingly provided at the center of the movable contact spring piece 52 in the longitudinal direction in the width direction. The spring support 53 is formed with notches 57 that open at both edges of the armature 51 in the width direction. A support piece 55 is provided so as to project from the deep end of the notch 57, and the tip end portion of the support piece 55 projects outward from the spring support body 53 in the width direction of the armature 51. That is, the movable contact spring piece 52 is fixed by the spring support body 53 at the center in the longitudinal direction, and
Since 55 is projected from the spring support 53,
Both ends of the movable contact spring 52 in the longitudinal direction and the support piece 55 independently apply a spring force. As shown in FIGS. 2 (a) and 2 (b), the armature block 5 is an armature.
The ridge 54 provided on the lower surface of the magnet 51 is housed in the groove 41 of the magnet piece 4, and the support piece 55 is fitted into the recess 13 provided in the side wall of the base 11 and fixed to the contact piece 21. The armature block 5 is arranged in a fixed position inside and can swing about the support piece 55 as an axis. On the intermediate portion 55a of the support piece 55, the facing portion 1 of the protrusion 16 from the cover 12 is provided.
6a is formed so as to project, and the opposing portion 16a prevents the support piece 55 from jumping and being displaced from the pivotal support portion to change the characteristics. A gap G is provided between the two. The value of the gap G is based on the surface where the contact portion 16b formed on the protrusion 16 contacts the fixed portion 55b of the support piece 55, and the support piece 55 is formed.
Since it is determined by the dimensional difference between the contact portion 16b and the facing portion 16a facing each other, by managing the dimension between the two,
The required gap G size can be easily obtained. Therefore, conventionally, the problem that the required gap G cannot be obtained due to variations in manufacturing or the like is solved, and the supporting piece 5 by the facing portion 16a of the protrusion 16 is solved.
The deformation prevention effect of 5 can be maximized. When the mechanical stress from the outside such as vibration or shock received by the intermediate portion 55a during transportation or rough handling is slight, it is absorbed by the gap G, and when it is excessive, it collides with the protrusion 16 and again returns to the original state. Restore to. The gap G is arbitrarily set in consideration of spring elastic deformation of the support piece 55. Forming the opposing portion 16a in the intermediate portion 55a of the support piece 55 allows the deflection of the support piece 55 to be fully utilized.

The general operation of this embodiment is as follows.
When 32 is energized, one end of the armature 51 in the longitudinal direction is attracted by one leg piece of the iron core 31 depending on the direction of magnetization, and the armature block 5 swings to move the iron core 31 to the armature 51. → Magnet piece 4 → A closed magnetic path of the iron core 31 is formed, and one end of the movable contact spring piece 52 in the longitudinal direction contacts the corresponding fixed contact 23. When the energization of the coil 32 is stopped in this state, the closed magnetic path is maintained as it is due to the magnetic force of the magnet piece 4, and the armature 51 is fixed to the iron core 31
The state of being in contact with one side is maintained.

In addition, if the energization direction to the coil 32 is reversed, the armature
51 is attracted to the other leg piece of the iron core 31, and the movable contact spring piece 52
The other end in the longitudinal direction of each of the two contacts the corresponding fixed contact 23. Even in this state, the current state is maintained after the energization is stopped, and so-called bistable operation is performed.

[Effect of device]

According to the present invention, as described above, the inner surface of the cover is formed with the protrusion having the facing portion that is opposed to the intermediate portion of the support piece that supports the armature block and the contact portion that contacts the fixed portion of the support piece. Since it is easy to set the size of the gap between the opposing portion and the support piece to the required value, the effect of preventing deformation of the support piece is enhanced, and it is affected by mechanical stress such as external vibration or shock. In addition, a polarized relay having stable characteristics can be configured.

[Brief description of drawings]

FIG. 1 (a) is an exploded perspective view showing an embodiment of the present invention. FIG. 2B is an enlarged perspective view of the main part of the same. FIG. 2 (a) is a sectional view of the above. FIG. 3B is a plan view of the same. FIG. 13C shows a cross sectional view taken along the line C-D in FIG. FIG. 3 is a perspective view on the lower surface side showing the armature block used in the embodiment. FIG. 4 is a sectional view showing a conventional example. 1 ... Casing, 3 ... Coil block, 4 ... Magnet piece, 5 ... Armature block, 11 ... Base, 12 ... Cover, 13 ... Recess, 14 ... Rib, 16 ... Protrusion, 16a …… opposite part, 16b …… contact part, 31 …… iron core, 32 …… coil, 51
…… Armature, 52 …… Movable contact spring piece, 55 …… Support piece, 55
a …… Middle part.

Claims (1)

[Scope of utility model registration request] 1. A coil block in which a coil is wound around an iron core, and both ends corresponding to the magnetic poles interposed between the magnetic poles of the iron core are magnetized to have the same pole, and the central portion between the both magnetic poles has different polarities. The base and the cover include a magnetized magnet piece and an armature block whose both ends face both magnetic poles of the iron core and whose central portion has an armature pivotably supported by the central portion of the magnet piece. The armature is integrally provided with a pair of movable contact spring pieces that are long in the direction connecting the magnetic poles of the iron core, and each movable contact spring piece corresponds to the pivotal support portion of the armature. In a polar relay in which each of the positions is provided with a support piece that integrally projects in a direction orthogonal to the longitudinal direction of the movable contact spring piece and is locked in a recess formed in the casing, the support piece is attached to the inner surface of the cover. An opposing part that is opposed to the middle part,
A polarized relay comprising a protrusion having an abutting portion that abuts a fixed portion of the support piece.