JPH05298997A - Polarized relay - Google Patents

Abstract

PURPOSE:To restrain magnetization holding force from being deteriorated while avoiding abrasion of metal so as to realize stable operation as a whole for a long period. CONSTITUTION:A polarized relay is provided with an iron core 1; a coil 3 wound around the iron core 1; a permanent magnet 4 interposed between pole pieces of the iron core 1; an armature 5 oscillatably mounted on the permanent magnet 4 via a fulcrum P; and a contact spring 6 integrated with the armature 5 and having a movable contact 8 for free contact with or separation from a fixed contact 9. The fulcrum P is constituted of a metal portion P1 projected from the armature 5 and a resin portion P2 attached to the armature 5 and flush with the metal portion P1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called balanced armature type polarized relay in which an armature is swingably mounted.

[0002]

2. Description of the Related Art Conventionally, as a polarized relay of this type, for example, a coil block in which a coil is wound around a substantially U-shaped iron core, and a permanent magnet interposed between both side pieces of the iron core. The balance armature type is arranged on the permanent magnet so as to be swingable, and both ends thereof are opposed to both side pieces of the iron core. Then, in this type of polarized relay, when the coil is energized in the forward and reverse directions, the armature is attracted to one of the magnetic pole surfaces of the iron core, and the attracted state is maintained even when the energization of the coil is stopped. There are so-called bistable operation, and monostable operation type in which the armature returns so as to be attracted to a specific magnetic pole surface of the iron core when the current to the coil is stopped.
In such a polarized relay, the armature is oscillatably mounted on the permanent magnet via a ridge-shaped fulcrum.

[0003]

By the way, in the polarized relay having such a structure, the fulcrum protruding from the metal armature is swingably supported by the permanent magnet.
As described above, there has been a problem that the fulcrum or the armature portion with which the fulcrum abuts is abraded early due to the sliding contact between the metals, and the contact / separation function of the contacts is significantly deteriorated. By the way, the order in which abrasion is likely to occur is the order of sliding contact between metals, sliding contact between metal and resin, and sliding contact between resins. The impact resistance performance of the polarized relay is determined by how much force the armature is magnetically held, and in the sliding contact between the resins, the magnetic pole path is cut and the impact resistance performance is reduced. It is a thing.

The present invention has been made in view of the above problems, and an object of the present invention is to prevent the magnetic holding force of the armature from decreasing while avoiding wear of the metal.
As a whole, it is to provide a polarized relay capable of performing stable operation for a long period of time.

[0005]

According to the present invention, an iron core 1, a coil 3 wound around the iron core 1, a permanent magnet 4 interposed between magnetic pole pieces of the iron core 1, and a permanent magnet 4 are provided. An armature 5 is mounted on the armature so as to be swingable via a fulcrum P, and a contact spring 6 to which a movable contact 8 that is integrally attached to the armature 5 and that contacts and separates from a fixed contact 9 is fixed. It is a polarized relay, and the fulcrum P has a metal portion P ₁ formed by protruding a part of the fulcrum P from the armature 5 and a resin portion P attached to the armature 5 and substantially flush with the metal portion P _1. It is characterized by being composed of ₂ and.

[0006]

In the present invention, as described above, the fulcrum P is partially contacted.
Metal part P formed by projecting from the pole 5₁And the pole
Metal part P attached to the child 5₁Resin part that is almost flush with
P₂And the armature 5 and the permanent magnet 4 are
Metal part P protruding from the armature 5₁And this is almost the same
Made resin part P₂It becomes a sliding contact form with. Then,
Suppresses the degree of wear compared to sliding contact between metals on the whole surface
Control, resin part P ₂The sliding contact between the and permanent magnet 4
Control the mechanical strength and increase the mechanical life. Moreover, the permanent magnet 4 is a fulcrum
Metal part P in P₁Secure a magnetic circuit by sliding contact with
However, the magnetic holding force of the armature 5 is sufficiently maintained.
It

[0007]

1 to 3 show an embodiment of the present invention. In the polarized relay of this embodiment, as shown in FIG. 3, an iron core 1 is formed in a substantially U-shape, and the iron core 1 is arranged with both side pieces facing upward. A coil bobbin 2 made of synthetic resin is integrally formed with the iron core 1. That is, the iron core 1 is the coil bobbin 2
Is insert molded. Here, the tip ends of both side pieces that are magnetic poles of the iron core 1 are exposed from the coil bobbin 2.
A coil 3 is wound around the body of the coil bobbin 2.
A rectangular parallelepiped permanent magnet 4 is attached between both side pieces of the iron core 1 exposed from the coil bobbin 2. The permanent magnet 4 is magnetized with different polarities at the center and both ends.

Explaining the manufacturing process of each member described above, first, the coil bobbin 2 is manufactured by inserting the iron core 1,
The coil 3 is wound around the coil bobbin 2, and then the permanent magnet 4 is attached. In the following description, the member including the iron core 1, the coil bobbin 2, the coil 3 and the permanent magnet 4 is referred to as an electromagnet block. The electromagnet block has terminals 7
Together with this, they are molded with a synthetic resin to be integrally molded as the body block 11 shown in FIG. The terminal 7, and the fixed contact terminal ₇₁ to the fixed contact 9 to the base end is formed, the common contact terminal 7 the hinge spring pieces 6a of the contact spring 6 is fixed piece 7a which is fixed are formed to be described later to the proximal end _2, a coil terminal 7 ₃ for performing energization of the coil 3, on both sides of the electromagnetic block, the two fixed contact terminals _71, one of the common contact terminal 7
_Two and two coil terminals 7 ₃ are implanted respectively. In addition,
The upper surface of the base of the common contact terminal 7 ₂ is molded so as to be exposed from the upper surface of the body block 11. After the formation, the portions exposed from the molding portions of the respective terminals 7 are bent downward.

As described above, when the iron core 1, the permanent magnet 4 and the fixed contact 9 are integrally formed as the body block 11,
The positional accuracy of the swing surface on which the armature block 12 described later is swingably mounted, the magnetic pole surfaces that are the upper surfaces of both side pieces of the iron core 1, and the fixed contact 9 can be increased. That is, in the case of individually assembling each member as in the conventional case,
Although the positions of the oscillating surface, the magnetic pole surface, and the fixed contact 9 vary due to variations in the assembly state of the respective members, if integrally formed as the body block 11 as in this embodiment,
The positional accuracy of the oscillating surface, the magnetic pole surface, and the fixed contact 9 can be easily increased. Therefore, the quality of the product is stable.

An armature 5 is arranged on the permanent magnet 4 of the body block 11. The armature 5 is formed in the shape of a flat plate, and a protrusion 5a serving as a swing fulcrum is formed in the center of the lower surface as shown in FIG. 4, and is mounted on the permanent magnet 4 so as to be swingable.
A contact spring 6 is integrally attached to the armature 5.
In the case of this embodiment, since it is a two-circuit type polarized relay, two contact springs 6 are provided on both sides of the armature 5.
The movable contacts 8 are fixed to both ends of the contact spring 6,
A hinge spring piece 6a is provided so as to project from one side portion of the central portion.
The hinge spring piece 6a is fixed to the fixing piece 7a of the common contact terminal 7 ₂ so that the contact spring 6 is electrically connected to the common contact terminal 7 ₂ . In addition, this hinge spring piece 6
The a also has a function of imparting a restoring force to the armature 5 by the twist generated when the armature 5 is attracted to one of the side pieces of the iron core 1. Further, in the present embodiment, the armature 5 and the contact spring 6 are molded with a synthetic resin to integrally form the armature block 12.

With the armature block 12 mounted and mounted on the permanent magnet 4 of the body block 11 as described above, the cover 12 shown in FIG. 2 is fitted. This cover 12
Has a box shape with an open lower surface, and has a sealing portion 13a for sealing the inside formed at one corner of the upper surface. The operation of the polarized relay of the above embodiment will be briefly described. In this polarized relay, in a stationary state where the coil 3 is de-energized, the end of the armature 5 on the side opposite to the side where the extension position of the hinge spring piece 6a is displaced by the magnetomotive force of the permanent magnet 4 is the iron core. 1
It is in a state of being attracted to the magnetic pole surface of.

When the coil 3 is energized so that the end on the side where the armature 5 is not attracted is attracted to the magnetic pole surface of the iron core 1, the end of the armature 5 is attracted to the iron core 1. The armature block 12 swings, and the armature 5 is attracted to the side piece of the iron core 1. At this time, the movable contact 8 on one end side of the contact spring 6 contacts the fixed contact 9. This state is maintained while the coil 3 is energized.

When the power supply to the coil 3 is stopped,
The above-mentioned spring force of the hinge spring piece 6a causes the armature 5 to return to a constant state and rotate against the attraction force between the armature 5 and the magnetic pole surface of the iron core 1 by the permanent magnet 4. According to this embodiment, the extension position of the hinge spring piece 6a is set to the armature block 12.
It is possible to make a polarized relay that operates monostable by simply displacing it from the center. Therefore, you can easily manufacture a polarized relay of monostable type by changing the contact spring 6 to a polarized relay of bistable type. can do.

Then, in the armature block 12,
A part of the fulcrum P formed by the protrusions 5a is an armature 5.
The metal part P formed by protruding from the₁And armature 5
In the synthetic resin part 18 attached and holding the contact spring 6
Metal part P formed in series ₁Resin part that is almost flush with
P₂It consists of and. This resin part P₂Is the metal part
Minute P₁Same surface as or resin part P₂Has a weak crown
It

[0015]

As described above, according to the present invention, the fulcrum is composed of a metal portion formed by protruding a part of the fulcrum from the armature and a resin portion attached to the armature so as to be substantially flush with the metal portion. Since it is configured, the armature and the permanent magnet are in a sliding contact form between the metal part protruding from the armature and the resin part that is substantially flush with the armature, and the sliding contact form between the metals is entirely formed. Compared with the above, the degree of wear is suppressed, the degree of wear is suppressed by the sliding contact between the resin portion and the permanent magnet, and the mechanical life is increased. There is an advantage that the magnetic holding force of the armature can be sufficiently maintained.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, (a) is a rear perspective view of an armature, (b) is a perspective view of a magnetic body portion of the armature from the back, and (c) is a diagram in (a). It is a sectional view taken along line XY.

FIG. 2 is an exploded perspective view of the above polarized relay.

3 (a) to 3 (d) are horizontal sectional views, vertical sectional views,
A sectional view taken along the line AB in FIG. 10A, and CD in FIG.
It is a line sectional view.

FIG. 4 (a) is an operation explanation part of the above, and FIG. 4 (b) is an operation explanation view of another embodiment.

[Explanation of symbols]

1 iron core 3 coil 4 permanent magnet 5 armature 6 contact spring 8 movable contact 9 fixed contact P fulcrum P ₁ metal part P ₂ resin part

Claims (1)

[Claims] 1. An iron core, a coil wound around the iron core, a permanent magnet interposed between magnetic pole pieces of the iron core, and oscillatably mounted on the permanent magnet via a fulcrum. A polarized relay including a contact arm and a contact spring fixed to a movable contact that is integrally attached to the armature and that contacts and separates from a fixed contact, and a fulcrum is formed by partially projecting from the armature. And a resin portion attached to the armature so as to be substantially flush with the metal portion.