JP3413847B2 - Polarized relay - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seesaw amateur type polarized relay.

[0002]

2. Description of the Related Art A polarized relay of this type has the following structure. First, the configuration of the entire polarized relay will be described with reference to FIG. As shown in FIG. 6, the casing is a box-shaped base 11 that is opened upward, and a box-shaped cover that is opened downward and is fitted to cover the outside of the side wall of the base 11 from above the base 11. It is composed of 12 and.

The base 11 is made of a resin molded product,
On both side walls in the width direction, recesses 13 that are open upward and inward and outward of the base 11 are formed at the central portions in the longitudinal direction thereof. On the bottom surface of each recess 13, one end 21a of a common terminal 21 simultaneously formed on the base 11 is exposed. The common terminal 21 is exposed to the outside of both side walls of the base 11 and has the other end protruding below the base 11.

Ribs 14 whose upper ends are located below the upper surface of the base 11 are formed at the four inner corners of the base 11. The fixed contact 23 provided on the upper end of the fixed contact terminal 24 simultaneously formed on the base 11 is exposed on the upper surface of the rib 14, and the fixed contact terminal 24 is exposed to the outside of both side walls of the base 11 and is not exposed. The end is projected below the base 11.

Notches 15 are formed on both end walls of the base 11 so as to open upward and to the inside and outside of the base 11.
One end 26 a of a pair of coil connection terminals 26 formed on the base 11 at the same time is projecting upward from the bottom surface of each notch 15. The coil connection terminal 26 is exposed to the outside of both side walls of the base 11 and has the other end protruding below the base 11.

In the coil block 3, a coil 7 is wound around a horizontal piece of a substantially U-shaped iron core 6 which is opened upward, and
The leg pieces of the iron core 6 are covered with the brims 8 each made of an insulating material, and the distal end portions of the leg pieces are formed so as to be exposed from one place on the peripheral surface of the brim 8. A pair of coil terminals 9 connected to the coil 7 are provided corresponding to each of the collars 8 and project above the upper end of the collar 8 and at the same time as the coil connecting terminal 2
It is bent so as to abut on No. 6.

With the coil block 3 housed in the base 11, the coil terminal 9 and the coil connection terminal 26 are electrically and mechanically connected by welding or soldering. The permanent magnets 4 are arranged between the exposed portions of the leg pieces of the iron core 6 so that the magnetic poles are in contact with each other. The permanent magnet 4 is plate-shaped and is fixed to the coil block 3 by adhesion or the like. Both ends are magnetized to the same pole, and the central part is magnetized to a different magnetic pole. That is, both ends are N
If it is a pole, the central portion is magnetized so as to become an S pole.

The armature block 5 is made of a magnetic material and is formed in a substantially rectangular flat plate shape, a molding portion 16 formed in the width direction of the central portion of the armature 10, and the molding portion 1.
6 and 6, a movable contact spring piece 17 which is held by simultaneous molding and is arranged parallel to the side surface of the armature 10, and an elastic support piece 18 which is integrated with the movable contact spring piece 17 and is simultaneously molded in the molding portion 16. It consists of and. FIG. 7 shows a side sectional view of the armature block 5.

The movable contact spring piece 17 is formed of an elongated conductive leaf spring whose central portion is formed at the same time as the forming portion 16 and has its other end extended in both ends of the armature 10. The central portion of the movable contact spring piece 17 is a hinge spring. The support piece 18 is integrally formed. A slit 19 is formed at the other end, which is a free end, and a movable contact 20 corresponding to the fixed contact 23 is formed in a bifurcated shape.

The armature block 5 has an elastic support piece 18 fitted in a recess 13 formed in the side wall of the base 11 and is welded and fixed to one end 21a of the common terminal 21. The fulcrum portion 2 provided on the upper surface of the permanent magnet 4 is rotatably mounted on the upper surface of the permanent magnet 4 so as to be swingably supported and disposed in the base 11. As described above, the cover 12 is fitted on the base 11 with the coil block 3, the permanent magnets 4, and the armature block 5 housed in the base 11 as shown in FIG.

FIG. 9 is an exploded perspective view showing the relationship among the armature 10, the permanent magnet 4, and the coil block 3. Since the base of the elastic support piece 18 with respect to the molded portion 16 is displaced from the central position of the armature block 5 in the longitudinal direction, the spring force of the elastic support piece 18 causes the armature 10 of the permanent magnet 4 to move the armature 10 to the core 6. By making the magnetomotive force to be attracted to the magnetic pole face of the armature block 10 against the attracting force between the armature 10 by the permanent magnet 4 and the magnetic pole face of the iron core 6, the armature block 10 can be returned and rotated to a constant state. it can. Therefore, in the illustrated example, a polarized relay that operates monostable is configured. Of course if no position of the base portion of the elastic supporting piece 18 is biased from the center position, Ru bistable operation is obtained.

With the above construction, normally, the end of the armature 10 on the side opposite to the bias of the elastic support piece 18 is stabilized in a state of being attracted to the permanent magnet 4, and the coil 32 is excited in a direction to cancel this attraction. Then, depending on the direction of magnetization, the armature 10
The other end of the armature is attracted to the corresponding magnetic pole of the iron core 31 and the armature block 5 swings, so that the iron core 6 → the armature 10 → the permanent magnet 4
→ A closed magnetic circuit of the iron core 6 is formed, and the movable contact 20 at one end of the movable contact spring piece 17 contacts the corresponding fixed contact 23. When the energization of the coil 32 is stopped in this state, the elastic support piece 18 returns to the original state by the restoring force.

[0013]

By the way, in the polarized relay having the above-mentioned structure, the distance between the central portion of the armature 10 of the armature block 5 and the central portion of the permanent magnet 4 is large and magnetic. Since the coupling is weak, there is almost no armature holding force at the central portion of the armature 10, and therefore the armature block 5 is held only by the elastic support piece 18 and the magnetic pole surface on the side attracted by the permanent magnet 4, and therefore There is a problem that the armature block 5 vibrates or rises due to external impacts, vibrations, etc. Due to this vibration and rise, the impact resistance of the polarized relay becomes low and contact sticks occur. There was a problem of doing.

Further, since the shunt effect for compensating the flow of the coil magnetic flux cannot be expected in the permanent magnet 4, there is a limit to the improvement in sensitivity. The present invention has been made in view of the above problems, and an object thereof is to provide a polarized relay having good magnetic characteristics.

[0015]

In order to achieve the above-mentioned object, the invention according to claim 1 has a coil block and an upper part of the coil block so as to be interposed between magnetic poles at both ends of an iron core of the coil block. Contact spring piece having a movable contact that is housed in a base and that has a movable contact that contacts and separates from a fixed contact provided in the base. the provided armature, the polarized relay is fixed to the tip to the base of the side walls and projecting integrally formed resilient support piece on both sides the center from the side of the armature to the movable contact spring piece, the permanent magnet The tops of both ends of
The magnetic metal bodies are attached to each .

According to a second aspect of the present invention, in the first aspect of the invention, the fulcrum portion of the armature supported by the permanent magnet is connected.
It is composed of a protrusion integrally protruding from the pole piece .

[0017]

According to the first aspect of the invention, the permanent magnet is used.
Since magnetic metal bodies were attached to both ends of the stone, magnetic metal bodies
Can supplement the flow of coil magnetic flux as a shunt,
Relay sensitivity ampere turn and open ampere turn
The magnetic attraction is increased to improve the magnetic characteristics and
It is possible to increase sensitivity.

According to the second aspect of the invention, the permanent magnet is
A protrusion in which the fulcrum of the supported armature is integrally projected from the armature.
The magnetic coupling between the armature and the permanent magnet
To improve the magnetic properties, resulting in
The holding force is increased, and even if external shock or vibration is applied, the contact pole
Support the child with the elastic support piece and the magnetic pole surface on the side attracted by the permanent magnet.
Hold it at the point and suppress the armature from trying to vibrate.
You can

[0019]

Embodiments of the present invention will be described below with reference to the drawings. Since the entire structure of the polarized relay is almost the same as that of the conventional example shown in FIG. 6 , only the essential part will be described.

(Embodiment 1) The basic structure of this embodiment is that the armature has a protrusion serving as a fulcrum portion 1 as shown in FIGS. 1 to 3 in the width direction on both sides of the lower surface of the central portion of the armature 10 of the armature block 5. It is projected integrally from 10.
The fulcrum portion 1 made of the magnetic material or al that are placed rotatably on the upper surface of the permanent magnet 4.

According to the basic construction of this embodiment, the fulcrum portion 1 of the armature 10 supported by the permanent magnet 4 can enhance the degree of magnetic coupling between the armature 10 and the permanent magnet 4. As a result, the holding force of the armature 10 can be increased. However, in FIGS. 1 to 3 , the permanent magnets 4 are anisotropically magnetized in the directions of both ends of the permanent magnets 4 in the order of S → N → S, so that the magnetizing after assembly is impossible. Therefore, it is necessary to mount the armature 10 after magnetizing it with the armature 10 removed, but this causes a problem of demagnetization.
Further, Fe—Cr—Co magnets that can be anisotropically magnetized must be used. Therefore, the permanent magnets 4 have a large thickness due to the low saturation magnet density, which makes it difficult to reduce the height of the relay. is there.

Therefore, by magnetizing the permanent magnet 4 in the vertical direction as shown in FIG. 4, it is possible to magnetize after assembly to eliminate the problem of characteristic deterioration due to demagnetization. The height may be reduced by using a high ferrite magnet such as barium ferrite or strontium ferrite or a rare earth magnet such as samarium / cobalt. In FIG. 4, a indicates the flow of magnetic flux of the permanent magnet 4, and b indicates the flow of coil magnetic flux.

[0023] Then, if no role shunt to attach the magnetic metal member 22 to the upper surface of both ends of the permanent magnet 4 as shown in FIG. 5, it is possible to compensate for the flow of the coil flux, the sensitivity of the relay The width of the attractive force between the ampere-turn and the open ampere-turn is increased to improve the magnetic characteristics, and the sensitivity of the relay can be increased.

[0024]

According to the invention of claim 1 , both ends of the permanent magnet are
Since the magnetic metal bodies were attached to the
Can supplement the flow of coil magnetic flux as
Sensitivity ampere turn and suction force at open ampere turn
The width of the relay to improve the magnetic characteristics, and
There is an effect that it becomes possible to improve.

According to the second aspect of the present invention, a permanent magnet is supported.
The fulcrum of the armature
As a result, the degree of magnetic coupling between the armature and the permanent magnet is increased.
To improve the magnetic properties, resulting in the holding force of the armature.
The armature is repelled even when shock or vibration is applied from the outside.
And the pole faces of the side and the fulcrum portion is sucked sexual support piece and the permanent magnet
Hold at to suppress the armature from trying to vibrate.
There is an effect that can be.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of the basic configuration of an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of the armature block of the above.

FIG. 3 is an exploded perspective view showing a schematic configuration for explaining a main part of the above.

FIG. 4 is an explanatory view of the essential parts of the basic configuration of another embodiment of the present invention.

5 is an explanatory view showing main components of a real施例of the present invention.

FIG. 6 is an exploded perspective view of a conventional example.

FIG. 7 is an enlarged sectional view of the above.

FIG. 8 is an enlarged sectional view of the armature block of the above.

FIG. 9 is an exploded perspective view showing a schematic configuration for explaining a main part of the above.

[Explanation of symbols]

1 fulcrum 3 coil block 4 permanent magnet 5 Armature block 10 Armature

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Fumihiro Kasano 1048 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd. (56) References JP-A-2-60020 (JP, A) JP-A-59-211929 ( (58) Fields surveyed (Int. Cl. ⁷ , DB name) H01H 51/24 H01H 50/16

Claims (2)

(57) [Claims] 1. A coil block, a permanent magnet disposed above the coil block so as to be interposed between magnetic poles at both ends of an iron core of the coil block, and a contact disposed swingably above the permanent magnet. A movable contact spring piece having a movable contact point that contacts and separates from a fixed contact provided in the base is provided in the armature, and an elastic support piece integrally formed with the movable contact spring piece is provided in the armature. In a polarized relay with the ends protruding from the center of both sides and fixing the tips to both side walls of the base , magnetic metal bodies are attached to the upper surfaces of both ends of the permanent magnet.
Polarized relays characterized by being attached to each other . 2. A fulcrum portion of an armature supported by a permanent magnet
The polarized relay according to claim 1, wherein the polarized relay is constituted by a protrusion integrally projecting from an armature .