JP2601994B2 - Rotating fulcrum type 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 rotary fulcrum type relay having a rotary fulcrum on an armature.

[0002]

2. Description of the Related Art As disclosed in Japanese Patent Application Laid-Open No. Hei 5-298997, a conventional rotary fulcrum type polarized relay includes a fulcrum part of an armature that rotates in contact with a permanent magnet, and a part of the armature. There is known a metal portion formed so as to protrude from the other portion, and the remaining portion is formed of a resin portion on the armature, so that the height of the resin portion and the height of the metal portion are substantially the same.

In the conventional rotary fulcrum type polar relay configured as described above, the fulcrum of the armature comes into contact with the permanent magnet, and the metal part and the permanent magnet of the fulcrum constitute a part of a magnetic circuit. Since the metal part of the fulcrum part and the resin part of the fulcrum part are in contact with the permanent magnet to form the fulcrum of the armature, compared to a rotating fulcrum type polar relay in which the fulcrum part is entirely made of a metal part,
It is said that the loss of the magnetic circuit is minimized, the wear of the fulcrum is reduced, the change in the magnetic resistance of the magnetic circuit is reduced, and the aging of the relay operation is improved, thereby stabilizing the operation.

[0004]

In the conventional rotary fulcrum type polarized relay, the metal portion and the resin portion of the fulcrum contact the permanent magnet at substantially the same height to form a fulcrum for the rotational movement of the armature. There is an advantage that the resin part is less worn than the contact part is composed only of metal part.However, if the relay operates frequently or the number of times of operation is large in the long term, the resin part of the fulcrum part Due to the wear, the metal part of the fulcrum also wears, and the magnetic resistance of the magnetic circuit changes, so that there is a problem that the sensing voltage and the open circuit voltage change.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a highly reliable rotating fulcrum type relay having a stable operation for a long period of time with little wear of a fulcrum of an armature. To provide.

[0006]

According to the present invention, there is provided a rotating fulcrum type polarized relay according to the present invention, wherein the top is flat and both sides are inclined at the center of the armature in the rotation axis direction with the rotation axis being symmetrical. And a rotation fulcrum that comes into contact with the permanent magnet at a predetermined interval from a flat portion of the armature protrusion at both ends in the rotation axis direction of the armature.

[0007] The rotary fulcrum type polarized relay according to the present invention is characterized in that the rotary fulcrum is made of a wear-resistant resin.

[0008]

The rotary fulcrum type polar relay according to the present invention is configured such that the armature has a flat top and a slant on both sides, and a permanent magnet which contacts the flat portion of the armature with a predetermined gap. Since the rotating fulcrum portion is provided, it is possible to prevent abrasion of the armature protrusion due to rotation of the armature.

Further, in the rotary fulcrum type polarized relay according to the present invention, since the rotary fulcrum is made of a wear-resistant resin, the abrasion of the armature convex portion can be prevented, and the stable operation of the relay can be realized.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show the configuration of a rotating fulcrum type polarized relay according to the present invention. FIG. 1 is a structural view of a contact spring block of a rotary fulcrum type polar relay according to the present invention, FIG. 2 is a structural sectional view of a polar electromagnet block and a contact spring block of a rotary fulcrum type polar relay according to the present invention, and FIG. FIG. 4 is an assembly diagram of a rotary fulcrum type polarized relay according to the present invention, and FIG. 4 is an overall configuration diagram of a rotary fulcrum type polar relay according to the present invention.

In FIG. 1, a contact spring block 2 includes an armature 6 provided with an armature projection 7, four contact springs 8A,
It comprises a rotating fulcrum 9A and a movable contact block 8 provided with a contact spring support 9, and the armature 6 and the movable contact block 8 are integrally formed.

The armature 6 is formed of a plate-shaped magnetic metal,
The end portions 6A and 6B at both ends in the longitudinal direction are configured to be in contact with the magnetic poles 12a and 12b formed by the substantially U-shaped iron core 12B of the polarized electromagnet block 3, respectively. Further, the armature 6 is provided with an armature projection 7 formed of the same magnetic metal as the armature 6 at the center of the contact spring block 2 in the rotation axis direction at the center in the longitudinal direction.

The armature projection 7 includes a flat portion 7A having a flat top and a sloping portion 7B having slopes on both sides with the rotation axis X being symmetrical. As shown in FIG. The magnetic circuit is configured such that the surface in contact with the rectangular permanent magnet 10 in the excited state is inclined so as to be wide, and the magnetic resistance of the magnetic circuit is sufficiently small.

The rotation fulcrum 9A is formed of a wear-resistant resin molded product, has a vertex on the rotation axis X that comes into contact with the rectangular permanent magnet 10, and is disposed on both sides of the armature projection 7 to rotate. The fulcrum of the moving contact spring block 2 is constituted. The vertex of the rotation fulcrum portion 9A is more than the flat portion 7A of the armature projection 7 by a distance d.
And contact the rectangular permanent magnet 10 with a gap of a predetermined distance d.
Is configured to prevent wear of the armature 6 that occurs when the armature rotates while contacting the rectangular permanent magnet 10, and to prevent a change in magnetic resistance due to wear of the armature 6.

The contact spring supporting portion 9 is formed of a resin integrally formed with the rotation fulcrum portion 9A, and supports and fixes four sets of contact springs 8A each having a contact 8B formed at its tip with a good conductor such as silver palladium. The configuration is as follows. As shown in FIG. 1, the two sets of contact springs 8A arranged on both sides in the longitudinal direction of the armature 6 adjust the inclination of the contact spring 8A and fix the fixing pieces 14 of the body block 4 shown in FIG. And is integrated with the fixed portion 8C to be electrically connected, and has electrical continuity.

In FIG. 2, the rotation fulcrum 9A rotates in contact with the rectangular permanent magnet 10, and the surface of the inclined portion 7B of the armature 6 contacts the surface of the rectangular permanent magnet 10 in a non-excited or excited state. With such a configuration, the magnetic resistance of the contact surface is small and maintains a stable value.

Further, the polarized electromagnet block 3 is fixed by inserting between a magnetic block 12a and 12b of a coil block 12 in which a coil 12A is wound around a substantially U-shaped iron core 12B. 12B, a flat yoke 11 forming a magnetic bypass circuit and a rectangular permanent magnet 10 mounted in a recess 11A provided in the flat yoke 11.

The flat yoke 11 is a single-stable type polarized electromagnet, and has a concave portion 11 formed asymmetrically with respect to the center of the flat yoke 11 (coinciding with the rotation axis X).
A, and a magnetic resistance adjusting portion 11B formed by cutting out a part of the plate-shaped yoke 11 to increase the magnetic resistance on the opposite side of the concave portion 11A, and the armature 6 always has the magnetic pole in the non-excited state. It is configured to form a stable state by contacting the side 12a. Also, by forming the recess 11A symmetrically with respect to the center of the plate-like yoke 11 and not providing the magnetoresistive adjuster 11B, a latching type polarized electromagnet that forms a bistable state may be formed. it can.

By pressing the flat yoke 11 between the opposed magnetic poles 12a and 12b of the iron core 12B, the flat yoke 11 forms a magnetic bypass circuit with the iron core 12B,
A power source whose polarity is determined in advance is applied to the coil block 12, and the polarities (N and S poles) of the magnetic poles 12a and 12b corresponding to the direction of the current flowing through the coil 12A (the rule of the right thumb) are set. A magnetic flux is generated that is proportional to the product (magnetomotive force) of the number of turns of the coil 12A and the current value flowing through the coil 12A, and is inversely proportional to the resistance (magnetic resistance) of the magnetic circuit.

The rectangular permanent magnet 10 is housed in a recess 11A provided in the flat yoke 11 so as to be accommodated in the recess 11A.
And magnetized so that the surface in contact with the bottom surface of the recess 11A becomes the S pole and the opposite surface becomes the N pole.

The magnetic bypass circuit of the polarized electromagnet block 3 is formed by a flat yoke 11 having a recess 11A.
Although the embodiment in which the rectangular permanent magnet 10 is mounted in the concave portion 11A has been described, the permanent magnet may be replaced with a permanent magnet as in the conventional embodiment.

In the assembly drawing of FIG.
Constitutes a case for accommodating the polarized electromagnet block 3, and includes two sets of power terminals (+) 16A and power terminals (-) 16B for applying power to the coil 12A of the polarized electromagnet block 3, and a contact spring. A fixed contact 13A that forms four circuit break contacts, a fixed contact 15A that forms two circuit make contacts, and two fixed contacts that are electrically connected to the fixed contact 13A. 2 electrically connected to terminal 13B and fixed contact 15A
Fixed contact terminals 15B, two fixed pieces 14 and a common terminal 14 that are electrically connected to the fixed portion 8C of the contact spring block 2.
B is provided.

A fixing portion 8C of the contact spring block 2 is fixed to the fixing piece 14 on the side surface of the body block 4 by laser welding or the like, and the movable contact 8B of the contact spring block 2 and the body block are fixed via the fixing portion 8C and the fixing piece 14. The four common contact terminals 14B are in an electrically conductive state.

The polarized electromagnet block 3 is attached to the body block 4.
The contact spring block 2 is disposed on the rectangular permanent magnet 10 of the polarized electromagnet block 3, and the fixing portion 8C of the contact spring block 2 is fixed to the fixing piece 14 of the body block 4.
Can be assembled in one direction by laser welding or the like, and can be covered with a cover 5 to form a rotating fulcrum type polarized relay 1 shown in FIG.

In the rotary fulcrum type polarized relay 1 assembled in one direction as described above, the rectangular permanent magnet 10 is provided so as to be biased toward the magnetic pole 12a, and constitutes a single stable type relay. In the non-excited state in which power is not applied to the coil 12A, the armature 6 of the contact spring block 2 has the end 6A in contact with the magnetic pole 12a due to the magnetizing action of the rectangular permanent magnet 10, and the rectangular permanent magnet Magnet 10-inclined portion 7B of armature projection 7-end 6 of armature 6
A-Magnetic pole 12a-Flat yoke 11-Rectangular permanent magnet 10
A magnetic circuit that generates magnetic flux in a loop is formed, and the armature 6
End 6A maintains a monostable (single stable) state in which the contact with the magnetic pole 12a is stable.

In the monostable state, the movable contact 8B arranged on the end 6A side of the armature 6 of the contact spring block 2 contacts the fixed contact 13A of the body block 4, and as a result, the fixed contact terminal of the body block 4 13B and common contact terminal 14
B forms an electrically conductive state.

On the other hand, the coil 12 of the polarized electromagnet block 3
In an excited state in which a power source having a predetermined polarity is applied to A, the polarized electromagnet block 3 forms an electromagnet, and the armature 6 shown in FIG. The end 6A is separated from the magnetic pole 12a and the armature 6 end 6B
Is in contact with the magnetic pole 12b, and the iron core 12B-the plate-like yoke 11
(Magnetic resistance adjusting portion 11B)-rectangular permanent magnet 10-inclined portion 7B of armature protrusion 7-end 6B of armature 6-magnetic pole 12
A magnetic circuit for generating magnetic flux is formed by the loop of the b-iron core 12B, and the end 6B of the armature 6 maintains a stable state of contact with the magnetic pole 12b as long as power is applied.

In this state, the movable contact 8B disposed on the end 6A side of the armature 6 of the contact spring block 2 is separated from the fixed contact 13A of the body block 4 and the end 6A of the armature 6 is moved.
The movable contact 8B arranged on the B side contacts the fixed contact 15A of the body block 4, and as a result, the fixed contact terminal 13B and the common contact terminal 14B of the body block 4 are electrically insulated (break state), and the fixed contact The terminal 15B and the common contact terminal 14B form an electrically conductive state (make state).

In this state, when the power applied to the coil 12A of the polarized electromagnet block 3 is removed, the armature 6 is inverted and returns to the first non-excited state, and the fixed contact terminal 13B of the body block 4 and the common contact terminal 14B returns to a stable state in which an electrical conduction state is formed.

The rotary fulcrum type polar relay 1 has been described as a single-stable type. However, as described above, the flat yoke 11 of the polarized electromagnet block 3 is provided with a concave portion 11A symmetrical about the center (rotation axis X). By providing only the fixed contact terminal 1 of the body block 4 in the non-excited state, for example,
3B and the common contact terminal 14B form an electrically conductive state,
In the excited state, the fixed contact terminal 15B and the common contact terminal 14B
Can form an electrically conductive state, and a latching (bistable) relay that maintains the same state even when the state is de-energized from this state.

[0031]

As described above, the rotary fulcrum type polarized relay according to the present invention has an armature projection having a flat top and inclined sides on the armature, and a predetermined distance from the flat portion of the armature projection. A rotation fulcrum that comes in contact with the permanent magnet with a gap of
Prevents mechanical wear of the armature protrusion and the rectangular permanent magnet due to the rotation of the armature, and makes it possible to contact the inclined surface of the armature protrusion with the rectangular permanent magnet surface. However, it is possible to stabilize the sensing voltage and the open-circuit voltage by reducing the magnetic resistance.

Further, in the rotating fulcrum type polarized relay according to the present invention, the rotating fulcrum portion is made of a wear-resistant resin, and the abrasion of the armature projection is prevented, so that the stable operation of the relay is improved. Can be.

Therefore, it is possible to provide a rotating fulcrum type polarized relay excellent in operation stability and reliability.

[Brief description of the drawings]

FIG. 1 is a structural view of a contact spring block of a rotating fulcrum type polarized relay according to the present invention;

FIG. 2 is a structural sectional view of a polarized electromagnet block and a contact spring block of the rotating fulcrum type polarized relay according to the present invention;

FIG. 3 is an assembly view of a rotating fulcrum type polarized relay according to the present invention;

FIG. 4 is an overall configuration diagram of a rotating fulcrum type polarized relay according to the present invention;

[Explanation of symbols]

Reference numeral 1: Rotary fulcrum type polarized relay, 2: Contact spring block, 3
... Polarized electromagnet block, 4 ... Body block, 5 ... Cover, 6 ... Apole, 6A, 6B ... End, 7 ... Protrusion,
7A: flat portion, 7B: inclined portion, 8: movable contact block,
8A: contact spring, 8B: movable contact, 8C: fixed part, 9 ...
Contact spring supporting portion, 9A: rotating supporting portion, 10: rectangular permanent magnet, 11: flat yoke, 11A: concave portion, 11B: magnetic resistance adjusting portion, 12: coil block, 12A: coil,
12B: iron core, 12a, 12b: magnetic pole, 13A, 15A
... fixed contacts, 13B, 15B ... fixed contact terminals, 14 ... fixed pieces, 14B ... common terminals, 16A, 16B ... power supply terminals.

Claims (2)

(57) [Claims] 1. A coil block in which a coil is wound around a substantially U-shaped iron core and opposing ends form magnetic poles, and an armature that rotates by electromagnetism of a polarized electromagnet block and contacts the magnetic pole. In a rotary fulcrum type polar relay provided with a contact spring block composed of a movable contact, an armature convex having a flat top and both sides inclined at the center of the armature in the rotation axis direction is symmetrical with respect to the rotation axis. A rotation fulcrum type, wherein a rotation fulcrum portion is provided at both ends of the armature in the rotation axis direction, the rotation fulcrum portion being in contact with the permanent magnet with a gap at a predetermined interval from the flat portion of the armature protrusion. Polarized relay. 2. The rotary fulcrum type relay according to claim 1, wherein the rotary fulcrum is made of a resin having wear resistance.