JPH0119310Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a polarized relay, and more particularly, to a polarized relay in which an armature is swingably disposed about its central portion as a fulcrum.

[Background technology]

In general, in this type of polarized relay in which the armature is arranged so as to be able to swing freely around the center of the armature,
Mechanical stress from the outside, such as shock and vibration applied during transportation or handling, can have a large effect on the armature block support piece spring, causing problems such as spring deformation, changes in characteristics, and performance deterioration. It was hot.

[Purpose of invention]

In view of the above circumstances, it is an object of the present invention to provide a polarized relay that has increased strength against mechanical stress at the intermediate portion of the support piece, withstands transportation and rough handling, and has stable characteristics.

[Disclosure of invention]

The present invention consists of a coil block in which a coil is wound around an iron core formed in a substantially U-shape, and a coil block that is interposed between the magnetic poles of the iron core and has both ends corresponding to the magnetic poles magnetized to the same polarity. A piece of magnet whose center part is magnetized with different polarities,
An armature block having an armature whose both ends face the magnetic poles of the iron core and whose center part is swingably supported by the center of the magnet piece is housed in a casing consisting of a base and a cover. 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, and each movable contact spring piece has a movable contact spring piece at a position corresponding to the pivot portion of the armature. In a polarized relay provided with a support piece that integrally projects in a direction perpendicular to the longitudinal direction and is locked in a recess formed in the casing,
The cover is characterized in that a protrusion is formed on the inner surface of the cover so as to be opposed to the central part of the support piece,
As a result, the mechanical strength of the supporting portion is increased, and the relay is constructed to withstand transportation and rough handling, and to have stable characteristics.

Embodiments of the present invention will be described below based on the drawings. In Fig. 1 and Fig. 2 a to c, 1 is a casing, and a base 1 made of an insulating material such as synthetic resin.
A coil block 3, a magnet piece 4, and an armature block 5 are arranged inside the casing 1.

The base 11 is box-shaped and open upward,
Fixed contact plate 2 having fixed contacts 23 at the four inner corners
A contact piece 21 and a common terminal piece 22, a fixed contact plate 24 and a fixed terminal piece 25, each formed integrally with a conductive plate, form a wall 14 to which 4 is fixed.
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 shape that is open downward.
6 is provided protrudingly. The protrusion 16 is connected to the support piece 5 described later.
The supporting piece 55, which is located on the intermediate portion 55a of the armature block 5 and supports the armature block, has the function of preventing deformation due to external mechanical stress.

The coil block 3 includes a coil 32 wound around a horizontal piece of a substantially U-shaped iron core 31 that is open upward;
It is formed of a coil terminal 34 that is the terminal thereof, and a coil terminal piece 27 that is connected to the coil terminal 34 via a coil terminal coupling piece 26.

The magnet piece 4 is plate-shaped, and a groove 41 with a substantially semicircular cross section 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 thick at the center in the longitudinal direction of the base 11 and gradually becomes thinner toward the ends. Also, base 11
Both ends of the magnet piece 4 in the longitudinal direction are respectively magnetized with the same polarity, and the central part is magnetized with different magnetic poles.

As shown in FIG. 3, the armature block 5 includes a magnetic armature 51 formed in a substantially rectangular flat plate shape, and a movable armature disposed substantially on the same plane as the armature 51 on both sides of the width of the armature 51. It is composed of a contact spring piece 52 and a spring support 53 which is a molded article of an insulating material such as synthetic resin and is integrally molded with the armature 51 and the movable contact spring piece 52. A supporting piece 55 having a substantially T-shaped distal end protrudes in the width direction from the center of the movable contact spring piece 52 in the longitudinal direction. Spring support 53
Notches 57 are formed in the armature 51 to open at both end edges in the width direction of the armature 51 . A support piece 55 is provided protruding from the inner end of this notch 57, and the tip of the support piece 55 is aligned with the spring support 55 in the width direction of the armature 51.
It protrudes outward. That is, since the movable contact spring piece 52 is fixed at the center portion in the longitudinal direction by the spring support body 53, and the support piece 55 is provided protruding from the spring support body 53,
Both ends of the movable contact spring 52 in the longitudinal direction and the support piece 55 each independently apply a spring force. As shown in FIGS. 2a and 2b, the armature block 5 fits the protrusion 54 provided on the lower surface of the armature 51 into the groove 41 of the magnet piece 4, and the support piece 55
The armature block 5 is disposed at a fixed position in the base 11 by fitting into a recess 13 provided in the side wall of the base 11.
It can swing freely around the axis. The protrusion 16 is formed on the intermediate portion 55a of the support piece 55 so as to protrude from the cover 12, and the protrusion 16 prevents the support piece 55 from jumping and being deviated from the pivot portion and changing its characteristics. . Further, a gap G is provided between the two. If the external mechanical stress such as vibration or impact that the intermediate part 55a receives during transportation or rough handling is slight, it will be absorbed by this gap G, and if it is excessive, it will collide with the protrusion 16 and return to its original state. Restore to. The gap G is arbitrarily set in consideration of the spring elastic deformation of the support piece 55. Providing the protrusion 16 oppositely to the intermediate portion 55a of the support piece 55 makes it possible to fully utilize the deflection of the support piece 55.

To describe the general operation of this embodiment, when the coil 32 is energized, one end of the armature 51 in the longitudinal direction is attracted to one leg of the iron core 31 depending on the direction of magnetization, and the armature Block 5 swings, iron core 31 → armature 51 → magnet piece 4 → iron core 31
A closed magnetic path is formed, and one longitudinal end of the movable contact spring piece 52 contacts the corresponding fixed contact 23. When the coil 32 is de-energized in this state, the closed magnetic path is maintained by the magnetic force of the magnet piece 4, and the armature 51 remains in contact with one of the iron cores 31.

Furthermore, if the current direction to the coil 32 is reversed, the armature 51 is attracted to the other leg of the iron core 31, and the other longitudinal end of the movable contact spring piece 52 connects to the corresponding fixed contact 23. come into contact with. Even in this state, the current state is maintained after the energization is stopped, resulting in so-called bistable operation.

[Effect of idea]

As described above, by forming a protrusion on the inner surface of the cover that is opposite to the middle part of the support piece that supports the armature block, the present invention is able to prevent external vibrations and shocks received during transportation or rough handling. This is advantageous in that it is possible to prevent the support piece from being deformed due to mechanical stress, and to construct a polarized relay that has stable characteristics without changing its operating characteristics.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing one embodiment of the present invention. FIG. 2a is a sectional view of the same as above. Figure b is a plan view of the same as above. Figure c is C-D in figure b.
Represents a cross-sectional view. FIG. 3 is a bottom perspective view of the armature block used in the same embodiment. 1...Casing, 3...Coil block, 4
... Magnet piece, 5 ... Armature block, 11 ... Base, 12 ... Cover, 13 ... Recess, 14 ...
Rib, 16...Protrusion, 31...Iron core, 32...Coil, 51...Archive, 52...Movable contact spring piece, 55...Support piece, 55a...Intermediate portion.

Claims (1)

[Scope of utility model registration request] A coil block is formed approximately in a U-shape and has a coil wound around an iron core, and a coil block is inserted between the magnetic poles of the iron core, and both ends corresponding to the magnetic poles are magnetized with the same polarity, and the central part between the two magnetic poles is different. The base consists of a magnet piece that is magnetized to a pole, and an armature block that has both ends facing the magnetic poles of the iron core and an armature whose center part is swingably supported in the center of the magnet piece. 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, and each movable contact spring piece has a In the polarized relay, support pieces are provided at corresponding positions, respectively, to protrude integrally in a direction perpendicular to the longitudinal direction of the movable contact spring pieces and to be latched in recesses formed in the casing. A polarized relay characterized by forming opposing protrusions in the middle of one side.