JPS5827468Y2 - Electromagnetic structure of electromagnetic relay - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a magnetic circuit for an electromagnetic relay, and particularly to an electromagnet structure that is effective when applied to an assembly process.

An electromagnetic relay is formed from an input coil, a magnetic circuit that magnetically couples the coil, and a contact circuit that serves as an output section.
The purpose of the present invention is to realize a low-cost relay by reducing the loss of the magnetic circuit, simplifying the assembly method, and reducing the number of man-hours.

A conventional configuration diagram of such a relay magnetic circuit is shown in FIG.

In the side sectional view of FIG. 1, 1 is a coil wound around an insulating frame, 2 is an iron core of the coil, 3 is a yoke, and the iron core 2 is connected to the iron core 2 at a location 7 by tightening or the like.

Reference numeral 4 denotes a movable armature, which is movably supported between the yoke 3 and 8, and a magnetic gap 5 is created between the iron core (magnetic pole) 2 and the armature 4 by the action of a coiled spring 6. be.

These 2, 3.4 and 5 form an excitation magnetic circuit for the relay coil 1.

The circuit is in the state shown in the figure when there is no excitation input, but when it is manually operated, it closes the gap 5 due to the magnetic attraction force, and although not shown, opens and closes the contact circuit of the relay.

In magnetic circuits or electromagnets with such a configuration, the choke joint requires magnetic coupling to a highly precise mechanical bend.
The joining operation requires a large number of assembly man-hours due to the precision in fitting the pieces together.

The purpose of the present invention is to solve these problems, improve the efficiency of the magnetic circuit, and reduce the number of assembly steps.

Its feature is the electromagnetic structure of the relay, in which the core is formed by bending a part of a punched magnetic plate into a U-shape, and the core and yoke are integrally formed.

This will be explained below with reference to the figures from FIG. 2 onwards.

FIG. 2 is a perspective view of a magnetic piece into which the iron core is integrally formed when the yoke is punched out.

In the figure, the same numbers as in the previous figure refer to the same functional components.

The figure shows a state in which a soft magnetic plate is, for example, pressed out and then bent in the subsequent process.
), 11 is a bent part for attaching the piece to the housing, 12 is a part forming a U-shaped iron core near the center of the piece, and 8 is a recessed part for receiving and supporting the armature 4. It is.

The U-shaped bend forming portion 12 is the shaded portion in FIG.

Figure 3 shows the drive coil 1 attached to the front piece, and Figure 2A.
-A' line shows the rear part where the cut can be made.

A feature is that the illustrated plurality of iron cores 12 are formed as one body with the yoke 3.

Reference numeral 13 is a space, and if a magnetic plate of a corresponding size is inserted therein, a single core of a magnetic circuit that is improved over the conventional one can be formed.

For this reason, in FIG. 4, a magnetic pole forming body 15 with a protruding collar (FIG. This shows an example.

According to the electromagnet structure of the present invention, the joint parts that are used for yoke and iron core constriction in the conventional structure are eliminated by integrating them, and the assembly process of the relay magnetic circuit is simplified and the circuit part It can be expected that the magnetic loss of the relay will be eliminated and the operating sensitivity of the relay will be made uniform, which is advantageous in terms of manufacturing.

Furthermore, by inserting both ends of the U-shaped portion toward the center of the coil, a stable insertion state between the iron core and the coil can be realized.

As a natural result, a low-cost relay was realized, which has great practical effects.

[Brief explanation of drawings]

Fig. 1 is a side cross-sectional view showing the magnetic circuit configuration of a conventional relay, Fig. 2 is a perspective view of a magnetic piece that integrates the yoke and iron core of the present invention, and Fig. 3 is a cross-sectional view of the magnetic circuit structure of a conventional relay. FIG. 4 is a diagram illustrating a cut section of the core part taken along the line A-A' and a coil mounting state, and FIG. 4 is a diagram in which a magnetic pole forming member is added to the core part shown in FIG. 3. In the diagram, 1... Coil, 2... Iron core, 3
...Yoke, 4...Movable armature, 7.
... Joint location between 3 and 4, 12 ... Iron core part (U-shaped cross section) of the present invention 13 ... Space, 15
and 16... magnetic pole forming member and magnetic pole forming plate.

Claims (1)

[Scope of utility model registration request] When forming a yoke in the iron core part of the magnetic circuit of an electromagnetic relay, a part of a punched magnetic plate is bent into a U-shape to form an iron core part, and both ends of the U-shape are aligned in the direction of the coil center. An electromagnetic structure for an electromagnetic relay, characterized in that an iron core and a yoke are integrally formed by inserting the iron into the yoke.