JPH0212671Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electromagnetic relay, particularly a small electromagnetic relay.

[Summary of the idea]

In this invention, a guide part for guiding a contact spring driving card is added to one of the winding frame molds at both ends of the winding. By including the winding terminal so as to protrude from the position, a compact electromagnetic relay with stable operation and easy handling of the winding terminal can be obtained.

[Prior art and problems] Various types of compact electromagnetic relays have been proposed in the past, but the smaller the relay, the closer the winding section and the contact section are, causing problems with the dielectric strength between them. At the same time, the spacing between the winding terminals also becomes smaller, making it difficult to handle the terminals when mounting the electromagnetic relay on a board. If the winding part and the contact part are separated by an insulating wall to increase the dielectric strength, the distance between the armature (movable iron piece) and the contact spring becomes longer, and if a contact spring drive card is used, the length will also be longer. As a result, operation becomes unstable.

Figure 4 shows a situation in which a large number of conventional electromagnetic relays are mounted close together on a board, where 40 is a board;
8' is a winding terminal. However, the terminal 8' indicates its lower end position. As the electromagnetic relay becomes smaller, the mutual spacing between the terminals 8' becomes smaller, making it difficult to process the terminals for connection to the pattern on the board.

[Means for solving problems]

This invention adds a guide part for guiding the contact spring drive card to one of the winding frame molds at both ends of the winding, and also includes a winding terminal in this guide part, so that the lower end of one terminal is in the direction of the winding axis. In contrast, the terminal was made to protrude at a position shifted from the bottom edge of the other terminal.

[Effect]

With the above configuration, it is possible to obtain a compact electromagnetic relay whose operation is stable and whose winding terminals can be easily processed.

〔Example〕

FIG. 1 is an exploded perspective view showing a preferred embodiment of the present invention. In the same figure, A is an electromagnet assembly;
B shows an insulating base, C shows an armature part, and D shows a contact spring drive card part.

In the electromagnet assembly A, 1 is an iron core, 2 and 2' are yokes, 3 is a winding, 4 and 4' are winding frame molds integrally formed with the yokes 2 and 2' at both ends of the winding, 5 and Reference numeral 6 indicates guide blocks (guide portions) added to both sides of one winding frame mold 4, 7 indicates a stepped portion, and 8 indicates a winding terminal. Iron core 1 and yoke 2, 2'
are integrated, and the actual number of turns of the winding 3 is many, and both ends of the winding 3 are soldered to the exposed upper end of the terminal 8 (not shown). One of the guide blocks 5 has a larger width in the winding axis direction than the other block 6, and the winding terminal in the guide block 5 is bent diagonally as shown by the broken line so that its lower end connects to the winding in the guide block 6. It is arranged to protrude at a position shifted from the lower end of the wire terminal 8 in the winding axial direction. In this way, as shown in Fig. 3, when a large number of electromagnetic relays are mounted close to each other on a board, the positions of the lower ends of the large number of winding terminals 8 are staggered and the distance between them increases, making it difficult to process the terminals. It becomes easier.

In the armature portion C, 9 is an armature, 10 is a hinge spring, and 11 is an engagement piece for attaching a contact spring driving card. Contact spring drive card part D
In the figure, 12 is a hole that engages with the engaging piece 11 of the armature, 13 is a card body, and 14 is a contact spring driving protrusion.

In the insulating base B, 15, 16 and 17 are insulating walls between the winding 3 and the contact spring, 18, 19 and 20
Reference numerals 21 and 22 indicate the insulating walls between the yokes 2 and 2' and the contact springs, and the guides 21 and 22 of the guide blocks 5 and 6 of the bobbin mold 4.

FIG. 2 is a perspective view of the insulating base B of FIG. 1 viewed from the opposite side. In the figure, 23 is a contact spring storage space, 24 is a set of contact springs, 25 is a contact spring terminal, 26 is a hole that engages with the driving protrusion 14 of the card, and 33 is a bottom plate. The insulating base is integrally molded, and the contact spring set 24 and its terminals 25 are fixed in their respective housings.

Next, I will explain how to assemble it. First, the card 13 is attached to the tip of the armature 9 using the engagement piece 11 and the engagement hole 12, the card 13 is inserted between the guide blocks 5 and 6, and the tip (lower) end of the hinge spring 10 is placed in the winding frame mold. 4' and the insulating wall 18,
Guide blocks 5 and 6 are the base guides 21 and 2.
Push in according to 2. At this time, the protrusion 27 of the winding frame mold 4' engages with the recess 28 provided in the insulating wall 18, and the recess 29 of the guide portion 5 and the protrusion 30 of the insulating wall 20 engage. Further, the insulating wall 19 is fitted into a space formed by the winding frame mold 4, the stepped portion 7, and the guide portion 6. Therefore, the electromagnet assembly A, the insulating base B and the armature C can be assembled with one touch. In this state, the armature 9 is connected to the hinge spring 1
The card 13 side is urged upward by the elasticity of the card 13, and the card 13 slides upward between the guide blocks 5 and 6, but the step 31 of the card 13 and the stopper inside the guide blocks 5 and 6 32
(only one side is shown) and the armature 9 is stopped.
The distance between the tip and the yoke 2 is kept constant. That is, the stepped portion 31 and the convex portion 32 serve as a backstop for the armature 9.

When current flows through the winding 3, the electromagnet is energized, the armature 9 is attracted to the yoke 2, and the card 13 slides downward between the guide blocks 5, 6 of the bobbin mold 4. Therefore, the drive protrusion 14 of the card 13
engages with the hole 26 at the tip of the contact spring to drive the contact spring set 24.

[Effect of idea]

As can be seen from the above description, according to the present invention, the following remarkable effects can be obtained.

1. Guide parts 5 and 6 are provided in the winding frame mold 4, and by including the winding terminal 8 in the guide part, a small and slim (narrow width) electromagnetic relay can be obtained by effectively utilizing the space. It will be done.

2 At that time, since the lower end of one of the winding terminals 8 comes out at a position shifted from the lower end of the other terminal in the winding axial direction, terminal processing when mounting on the board 40 is facilitated.

3 The contact spring drive guard 13 is connected to the guide portions 5 and 6.
Since the guard 13 slides smoothly, stable operation can be obtained even if the guard 13 becomes long. This results in
This also solves the problem of dielectric strength.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing a preferred embodiment of the present invention, FIG. 2 is a perspective view of the insulating base shown in FIG. FIG. 4 is a diagram showing the usage status of the conventional example. 3... Winding wire, 4... Winding frame mold, 5, 6...
Guide portion, 8... Winding terminal, 9... Armature, 13
...Contact spring driving card, 24...1 set of contact springs.

Claims (1)

[Scope of utility model registration request] A contact spring driving card is attached to the tip of the armature, and a guide part for guiding the operation of the contact spring driving card is added to one of the winding frame molds formed at both ends of the winding, and the winding is attached to the guide part. An electromagnetic relay characterized in that terminals are included such that the lower end of one terminal protrudes at a position shifted from the lower end of the other terminal with respect to the winding axis direction.