JPH027323A - Solenoid relay - Google Patents

Abstract

PURPOSE:To provide stable characteristic and minimize dispersion in the electrical characteristic of individual product by forming either a recess or a boss near the two ends of a permanent magnet of a coil assembly, forming a boss or a recess in the center of an insulation fixing member constituting a movable contact spring block, and fitting them with a fine-gap reserved. CONSTITUTION:A movable contact spring block 1 consolidates a contact polar piece 1a, movable contact spring 1b, and hinge spring 1c by the use of an insulation fixing member 1d. The contact polar piece 1a is provided with a boss 1e, and a boss 1f is formed on the insulation fixing member 1d. A coil assembly 2 is composed of a channel-shaped core 2b with a coil 2a wound around, permanent magnet 2c, and insulation 2e, and a recess 2f is formed in this insulation 2e near the end of the permanent magnet 2c. These movable contact spring block 1 and coil assembly 2 are fitted together, and the boss 1f and recess 2f are fitted together with a fine-gap reserved, wherein a fulcrum for tilting motion lies on the oversurface of permanent magnet 2c and the contact polar piece boss 1e. The gives the tilting motion a stable characteristic, and a solenoid relay concerned is equipped with a strengthened impact resistance and enhanced anti-wear characteristic.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electromagnetic relay, and more particularly to an electromagnetic relay including a movable contact spring block and a coil assembly.

[Conventional technology]

Conventionally, this type of electromagnetic relay combines a movable contact spring block and a coil assembly, and the movable spring block is tilted by a permanent magnet provided in the coil assembly.

FIG. 5 is an exploded view of parts of an electromagnetic relay showing a conventional example.

As shown in FIG. 5, this electromagnetic relay has a coil assembly 2 in which a permanent magnet 2C fixed with an insulator 2e is arranged in the center of a U-shaped iron core 2b around which a coil 2a is wound.
An armature 1a arranged such that both ends thereof fit into both magnetic pole parts of the armature 1a.
and hinge spring] c.

A movable contact spring block 1 in which a movable contact spring 1b is integrally fixed with an insulating fixed body [d] is fixed, and tilting movement is performed using the armature central convex portion 1e formed on the armature 1a as a fulcrum. The movable contact spring block 1 is shown with its back side up, and when it is fixed to the coil assembly 2, this back side engages the top surface of the coil assembly 2. Note that 2d molded on the insulator 2e is a terminal for connecting the coil.

[Problem to be solved by the invention]

The conventional electromagnetic relay described above requires a small gap between the notches at both ends of the head-shaped core and the sides of both ends of the armature, and in order to secure this gap, the movable contact spring block and coil assembly are Special jigs and tools are required to determine the positional relationship.

In other words, the only thing that determines the positional relationship between the coil assembly and the movable contact spring block is the notch at both ends of the opening-shaped core, and the opening-shaped core and armature are separated by a permanent magnet located in the center of the opening-shaped core. Because it is a flow path for the generated magnetic flux, it is not possible to specify an accurate positional relationship, making it impossible to obtain stable characteristics, causing deviations in vertical dimensions due to wear, and poor impact resistance. It has the following disadvantages.

An object of the present invention is to provide an electromagnetic relay that achieves stable characteristics of such tilting motion, as well as strengthens impact resistance and improves wear resistance.

[Means to solve the problem]

The electromagnetic relay of the present invention includes a coil assembly including a permanent magnet arranged in the center of a square-shaped iron core around which a coil is wound, an armature arranged so that both ends thereof fit into both magnetic pole parts of the iron core, and A movable contact spring block includes a hinge spring that causes the armature to perform a tilting motion, a movable contact spring disposed near the armature, and a movable contact spring block that is integrally fixed to an insulating fixed body. In an electromagnetic relay that performs a tilting motion using a convex portion formed at the center of a pole as a fulcrum, a convex portion or a concave portion is formed in the insulator near both ends of the permanent magnet of the coil assembly, and the movable contact spring block is insulated. A concave portion or a convex portion is formed in the center of the fixed body, and the convex portion or the four portions are configured to fit each other with a small gap.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an exploded view of parts of an electromagnetic relay showing a first embodiment of the present invention.

As shown in FIG. 1, a movable contact spring block 1 constituting this electromagnetic relay is shown with its back side up as in the conventional example, and includes an armature 1a, a movable contact spring lb, and a hinge spring IC.
are integrally fixed by an insulating fixed body 1d, and a convex portion 1e is provided at the center of the armature 1a, and the insulating fixed body 1d
A convex portion 1f is formed on. The coil assembly 2 is composed of a square-shaped iron core 2b around which a coil 2a is wound, and an insulator 2e in which a permanent magnet 2C and a terminal 2d are molded. A recess 2f is formed in the body 2e. By matching the movable contact spring block 1 and the coil assembly 2 described above, the permanent magnet 2c
The upper surface and the armature convex portion 1e serve as fulcrums for the tilting motion, and the convex portion 1
f and the recess 2f fit with each other with a small gap.

FIG. 2 is a central cross-sectional view of the electromagnetic relay components shown in FIG. 1 in an assembled state.

As shown in FIG. 2, when the movable contact spring block 1 is assembled into the coil assembly 2 in reverse (with the back side facing the mating side), a convex portion 1e, a permanent magnet 2C5, a convex portion 1f and a concave portion 2f are assembled.
are respectively engaged.

FIG. 3 is an exploded view of parts of an electromagnetic relay showing a second embodiment of the present invention.

As shown in FIG. 3, the movable contact spring block 1 consists of an armature 1a, a movable contact spring lb, and a hinge spring 1c that are integrally fixed by an insulating fixed body 1d, and a convex portion 1e is formed at the center of the armature 1a. Also, a recess 1f' is formed in the insulating fixed body 1d. On the other hand, the coil assembly 2 is composed of a square-shaped iron core 2b around which a coil 2a is wound, and an insulator 2e in which a permanent magnet 2C and a locking terminal 2d are molded. A convex portion 2f' is formed on the body 2e. When the above-described spring block 1 and coil assembly 2 are fitted, the upper surface of the permanent magnet 2C and the armature convex portion 1e serve as fulcrums for tilting movement, and the concave portion 1f' and the convex portion 2f fit with each other with a small gap.

FIG. 4 is a central cross-sectional view of the electromagnetic relay components shown in FIG. 3 in an assembled state.

As shown in FIG. 4, this case is also similar to FIG. 2, except that the side forming the convex portion and the side forming the concave portion are reversed, and the operation of the relay is the same.

〔Effect of the invention〕

As explained above, the electromagnetic relay of the present invention has concave or convex portions formed near both ends of the permanent magnet of the coil assembly, and a convex or concave portion in the center of the insulating fixed body that constitutes the movable contact spring block. The following effects can be obtained by adapting the structure with a small gap.

(1) The magnetic gap between the notch at the end of the U-shaped core and the armature can be maintained at a constant distance, making it possible to obtain stable characteristics and reduce variations in the electrical characteristics of individual products. can be kept to a minimum.

(2) By setting the armature and two protrusions or recesses as fulcrums for the tilting movement of the movable contact spring block, it is possible to suppress vertical dimensional fluctuations due to wear and the generation of foreign objects. .

(3) Since the lateral movement of the movable contact spring block is restricted and deformation of the hinge spring caused by movement of the armature due to impact can be avoided, vibration resistance and impact resistance are greatly improved.

[Brief explanation of the drawing]

FIG. 1 is an exploded view of parts of an electromagnetic relay showing a first embodiment of the present invention, FIG. 2 is a central cross-sectional view of the assembled electromagnetic relay components in FIG. 1, and FIG. An exploded view of parts of an electromagnetic relay showing a second embodiment, Fig. 4 is a central cross-sectional view of the electromagnetic relay shown in Fig. 3 in an assembled state, and Fig. 5 shows parts of an electromagnetic relay showing a conventional example. This is a developed diagram. 1... Movable contact spring block, 1a... Armature, 1
b...Movable contact spring, 1c...Hinge spring, 1d.
...Insulating fixed body, 1e... Armature central convex portion, 1f...
・Insulating fixing body convex part, 1f'... Insulating fixing body concave part, 2・
... Coil assembly, 2a ... Coil, 2b ... U-shaped iron core, 2C ... Permanent magnet, 2d ... Karaoke terminal, 2e ... Insulator, 2f ... Insulator recess , 2f'・
...Insulator protrusion. Agent: Susumu Uchihara, Patent Attorney, 11!57

Claims (1)

[Claims] A coil assembly comprising a permanent magnet arranged in the center of a U-shaped iron core around which a coil is wound, an armature whose ends are arranged so as to fit both magnetic pole parts of the iron core, and a tilting motion of the armature. a movable contact spring block integrally fixed to an insulating fixed body, and a convexity formed in the center of the armature on the upper surface of the permanent magnet; In an electromagnetic relay that performs a tilting motion with a part as a fulcrum, a concave part or a convex part is formed in the insulator near both ends of the permanent magnet when the coil is not assembled, and a convex part is formed in the center part of the insulating fixed body of the movable contact spring block. Alternatively, an electromagnetic relay characterized in that a concave portion is formed, and the convex portion or the concave portion are fitted with each other with a small gap.