JPH04223016A - Relay structure - Google Patents

Abstract

PURPOSE:To enhance mechanical shock resistance in the case of a drop. CONSTITUTION:Projections 58 are projected from inside surfaces on both sides of a notch 57 of a spring supporter 53 of an armature block 5 in such a manner that a gap G between the tip ends of the projections 58 and side edge surfaces of a narrow hinge 55a of a supporting piece 55 becomes less than 0.1mm. Since the hinge 55a of the supporting piece 55 abuts against the projections 58 even though a mechanical shock such as a drop may be generated, deformation of the hinge 55a can be restrained to an extent of the gap G. Therefore, it is possible to enhance mechanical shock resistance.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relay structure in which an armature block is swingably supported by a hinge spring.

0002

2. Description of the Related Art First, a conventional relay of this type will be explained. As shown in FIG. 3, the casing 1 has a box-shaped base 11 that is open upward, and a box-shaped base 11 that is open downward, and is fitted from above the base 11 so as to cover the outside of the side wall of the base 11. It is composed of a cover 12.

The base 11 is a molded product made of an insulating material such as synthetic resin and has a substantially rectangular parallelepiped shape, and has recesses 13 with open upper and inner surfaces formed in the center of each side. A common terminal 2 is provided on the bottom of each recess 13.
The common terminal 21 is integrally formed of a conductive plate with a common terminal piece 22 that is exposed on the outside of the side wall in the width direction of the base 11 and protrudes downward.

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, respectively. A fixed contact 23 is provided on the upper surface of the rib 14.
The fixed contact plates 24 overlap each other, and the fixed contact plates 24 are integrally formed of a conductive plate with a fixed terminal piece 25 that is exposed on the outside of the side wall in the width direction of the base 11 and projects downward. A notch 15 is formed in the center of the side walls at both ends of the base 11 and is open upward and to the front and back sides of the side wall, and from the bottom of each notch 15 is a pair of coil terminal coupling pieces 2.
6 protrudes upward. Coil terminal coupling piece 2
Reference numeral 6 is formed of a conductive plate integrally with a coil terminal piece 27 that is exposed to the outside of both side walls in the width direction of the base 11 and projects downward.

[0005] In this way, the common terminal 21 and the common terminal piece 2
2. The fixed contact plate 24 and the fixed terminal piece 25, and the coil terminal coupling piece 26 and the coil terminal piece 27 are each formed integrally with a conductive plate, and the base 11 and each conductive plate are integrated by insert molding. . The conductive plate is routed within the side wall of the base 11 so that the conductive plate is installed within the side wall of the base 11 over substantially the entire length thereof. therefore,
The side walls of the base 11 are reinforced by the conductive plate, which increases the strength of the base 11 due to its box shape.

The cover 12, like the base 11, is a substantially rectangular parallelepiped molded product made of an insulating material such as synthetic resin, and has four partition pieces 16 suspended from the ceiling surface. A coil block 3, a permanent magnet 4, and an armature block 5 are disposed within a casing 1 formed by a base 11 and a cover 12. Coil block 3 is shown in Figure 4.
As shown in FIG. 2, a coil 32 is wound around the horizontal pieces of a substantially U-shaped iron core 31 that is open upward, and each leg piece of the iron core 31 is covered with a flange 33 made of an insulating material. The tip of the leg piece is exposed from one place on the circumferential surface of the leg piece. Coil terminal 34 connected to coil 32
are provided in pairs corresponding to each collar 33, protrude upward from the upper end of the collar 33, and are bent so as to come into contact with the coil terminal coupling piece 26.

[0007] With the coil block 3 housed in the base 11, the coil terminal 34 and the coil terminal coupling piece 26 are electrically and mechanically coupled by welding, soldering, or the like. The magnet block 4 is interposed between the exposed portions of the legs of the iron core 31 with its magnetic poles in contact with each other. The permanent magnet 4 located above the coil 32 is plate-shaped, and the surface is coated with an insulating material such as synthetic resin.
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 permanent magnet 4 is an inclined surface 42 that is thickest at the center in the longitudinal direction of the base 11 and is tapered so that the thickness gradually decreases toward the ends.

Further, both ends of the permanent magnet 4 in the longitudinal direction of the base 11 are magnetized with the same polarity, and the central part is magnetized with different magnetic poles. That is, if both ends are north poles, the center part is magnetized to be south pole. Then, the magnetic poles at both ends of the coil block 3 are interposed between the legs of the iron core 31 in such a manner that they are in contact with the inner surfaces of the legs.

The armature block 5 includes an armature 51 made of a magnetic material and formed into a substantially rectangular flat plate shape, and movable contact springs disposed substantially on the same plane as the armature 51 on both sides of the armature 51 in the width direction. piece 52, armature 51 and movable contact spring piece 5
2 and a spring support 53 which is a molded article of an insulating material such as synthetic resin.

As shown in FIG. 5, on the bottom surface of the armature 51,
A fulcrum portion 54 having a substantially semicircular cross section is formed in the width direction of the armature 51 and is formed into a protrusion. The movable contact spring piece 52 is an elongated electrically conductive plate spring, and a support piece 55 that serves as a hinge spring and whose tip end is formed in a substantially T-shape in the width direction is integrally provided at the center in the longitudinal direction to protrude. ing. In addition, slits 56 each having a tip opening are provided at both ends in the longitudinal direction.
is formed so that the tip of the movable contact spring piece 52 is easily bent.

Notches 57 are formed in the spring support 53 and open at both ends of the armature 51 in the width direction. A support piece 55 is provided protruding from the inner end of this notch 57.
5 is connected to the spring support 5 in the width direction of the armature 51.
It protrudes outward more than 3. That is, since the movable contact spring piece 52 is fixed at the center portion in the longitudinal direction by the spring support 53 and the support piece 55 is provided protruding from the spring support 53, the movable contact spring piece 52 is fixed in the longitudinal direction. Spring force is applied to both ends of the support piece 55 and the support piece 55 independently. This armature block 5 is constructed by fitting the fulcrum part 54 provided on the lower surface of the armature 51 into the recessed groove 41 of the permanent magnet 4, and fitting the support piece 55 into the recess 13 provided on the side wall of the base 11. 1
The armature block 5 is arranged at a fixed position within the armature 1, and the armature block 5 can swing freely around the support piece 55.

As described above, the cover 12 is fitted onto the base 11 with the coil block 3, permanent magnet 4, and armature block 5 housed within the base 11. The four partition pieces 16 protruding from the inner circumferential surface of the cover 12 are inserted into the gaps between the armature 51 and the movable contact spring pieces 52, respectively, with the cover 12 fitted onto the base 11. An insulating partition piece 16 is interposed between the pole piece 51 and the movable contact spring piece 52, so that a large insulation distance can be maintained between the two.

With the above configuration, 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 according to the direction of magnetization, and the armature block 5
swings, iron core 31 → armature 51 → permanent magnet 4 → iron core 3
One closed magnetic path is formed, and one longitudinal end of the movable contact spring piece 52 contacts the corresponding fixed contact 23. When the current to the coil 32 is stopped in this state, the closed magnetic path is maintained by the magnetic force of the permanent magnet 4, and the state in which the armature 51 is in contact with one side of the iron core 31 is maintained.

Furthermore, if the direction of current to the coil 32 is reversed, the armature 51 will be attracted to the other leg of the iron core 31, and the other longitudinal end of the movable contact spring piece 52 will be connected to the corresponding fixed Contact point 23 is contacted. Even in this state, the same state is maintained after the power supply is stopped.
So-called bistable operation can be performed.

[0015]

[Problems to be Solved by the Invention] In such a conventional example, as shown in FIG. 6, the narrow hinge portion 55a of the support piece 55 is easily deformed by mechanical impact, and as a result, the touching and opening characteristics vary. There was a problem. The present invention has been provided in view of the above-mentioned points, and it suppresses the deformation of the hinge part against mechanical shocks such as drops, reduces fluctuations in the operating characteristics of the relay, and improves shock resistance in actual use. This provides a relay structure aimed at improving performance.

[0016]

SUMMARY OF THE INVENTION According to the present invention, a protrusion that narrows the gap between the side end surface of the support piece and the inner surface of the cutout is provided to protrude from the inner surface of the cutout.

[0017]

[Function] The protrusion protruding from the inner surface of the notch suppresses deformation due to mechanical shock to less than the gap between the protrusion and the side end surface of the support piece, improving mechanical impact resistance. There is.

[0018]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. Incidentally, since the overall configuration of the relay is the same as the conventional one, only the gist will be described in detail. As shown in FIG. 1, protrusions 58 are provided protruding from the inner surfaces on both sides of the notch 57 of the spring support 53 of the armature block 5, and the tips of the protrusions 58 and the narrow hinge portion 55a of the support piece 55 are connected to each other. The protrusion 58 is provided so as to protrude so that the gap G between the protrusion 58 and the side end face is 0.1 mm or less.

[0019] Even if there is a mechanical shock such as a fall,
Since the hinge portion 55a of the support piece 55 hits the protrusion 58,
Deformation of the hinge portion 55a can be suppressed to about the gap G, and mechanical impact resistance can be improved. Here, because it is not possible to narrow the entire gap G due to the molding die for the spring support 53, the gap G is partially narrowed in a portion close to the most effective portion.

The thickness of the protrusion 58 is made sufficiently larger than the plate thickness of the movable contact spring piece 52, and the thickness of the protrusion 58 is set so that the spring supporter can contact the protrusion 58 even if the movable contact spring piece 52 is slightly displaced in the plate thickness direction. The thickness is the same as that of 53. Also, the portion A of the support piece 55 is made as large as possible, and the hinge portion 55
The strength is improved against the deformation of a.

By the way, in this embodiment, as shown in FIG. 2, the structure of the base 11 is also improved in mechanical impact resistance. That is, the rib 18 is formed on the inner surface below the recess 13 of the base 11, and the notch 57 of the armature block 5 is formed.
The inner surface of the notch 57 of the spring support body 53 comes into contact with the rib 18, thereby preventing deformation of the hinge portion 55a due to mechanical impact.

In this manner, deformation of the hinge portion of the armature block 5 can be suppressed to a small level even at the moment of impact, and mechanical impact resistance can be improved.

[0023]

Effects of the Invention As described above, the present invention is provided with a protrusion projecting from the inner surface of the notch to narrow the gap between the side end surface of the support piece and the inner surface of the notch. Due to the more protruding protrusions, even at the moment of impact, the deformation of the hinge portion of the armature block is suppressed to less than the gap between the protrusions and the side end surface of the support piece, improving mechanical impact resistance. Therefore, it is resistant to drop impact.
This has the effect of improving vibration resistance and impact resistance.

[Brief explanation of the drawing]

FIG. 1(a) is a plan view of an armature block according to an embodiment of the present invention. (b) is a sectional view taken along line AB in FIG. 1(a).

FIG. 2 is an exploded perspective view of the entire relay.

FIG. 3 is an exploded perspective view of the entire conventional relay.

FIG. 4 is a sectional view of a conventional relay.

FIG. 5 is a perspective view of a conventional armature block.

FIG. 6(a) is a plan view of a conventional armature block. (b) is a sectional view taken along line AB in FIG. 6(a).

[Explanation of symbols]

4 Permanent magnet 5 Armature block 31 Iron core 32 Coil 51 Armature 52 Movable contact spring piece 53 Spring support 55 Support piece 57 Notch 58 Protrusion

Claims (1)

[Claims] Claim 1: A permanent magnet interposed between magnetic poles of an iron core around which a coil is wound, and an armature block pivotally supported on the upper surface of the permanent magnet located above the coil. ,
A relay that opens and closes contacts by swinging the armature when the end of the armature is attracted to the magnetic pole surface of the iron core when the coil is energized, and includes the armature and a movable contact that opens and closes the contacts. A spring support made of a molded material that holds a spring piece, an armature and a movable contact spring piece at an intermediate portion thereof, and a support piece that protrudes laterally from a notch opened in an end face of the spring support and serves as a hinge spring. A structure of the relay comprising the armature block described above, characterized in that a protrusion that narrows the gap between the side end surface of the support piece and the inner surface of the notch projects from the inner surface of the notch.