JPS58128624A - Electromagnetic relay - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a t-magnetic relay.

Conventionally, hinge-type electromagnetic relays have mainly been made by attaching a spool assembly with a coil wound around the iron core, and attaching a spool assembly with a coil wound around the iron core. It was provided with hinge support on the frame.

However, with this type of product, the number of parts is large and the assembly work is extremely complicated. Variations in the dimensional accuracy and assembly accuracy of the parts have a large negative impact on characteristics, and fine adjustments after assembly require a large amount of time. Ta.

This defense has been made in view of these shortcomings, and its purpose is to reduce the number of parts required for assembly work,
It is an object of the present invention to provide an electromagnetic relay that can be assembled with high precision and can omit all adjustment steps after assembly.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings, which are exemplary embodiments.

1. The electromagnetic relay according to the invention is schematically shown in Fig. 8 and Fig. 4.
As shown in the figure, a coil block 1 and a contact block 20
, the movable iron piece 40 , the contact driving force field 50 , the cover 60 , and
), and the card 50 is movable in the directions of arrows a and a as shown in FIGS. 1 and 2, and based on this movement, the movable contact 82 is switched with respect to the fixed contacts 84 and 86.

The coil block l has a spool lO fixed around a flat U-shaped iron core 2 by insert molding, and both ends of the iron core 20 protrude upward from the spool 10, and one side of this protruding part is the FiB pole surface. 3λ, 3b (see Figure 4)
It is said that In addition, both end flanges 11a, ll of the spool 10
A coil terminal 5 is attached to the base parts 12a and 12b formed at the lower part of b by insert molding, and the core wire of the coil 9 wound around the spool 10 is connected to this coil terminal 5 by soldering. ing.

The contact block 20 has a movable contact piece 30, a normally closed side fixed contact piece 38, and a normally open side fixed contact piece 35 fixed to an insulating base 21 by insert molding, and the lower part of each contact piece 80, 83, 85 is insulated. It protrudes downward from the stand 21. This insulating stand 21 has three side walls 21a and 21b as shown in FIG.
, 2IC, a substantially box-shaped plate having a recess 22 surrounded by a top surface 21d and a bottom surface 121e. In addition, each contact piece 8U
, B8゜35 is punched out of a single hoop 1 to a predetermined shape, the contacts 32, 84, 36 are fixed, and a predetermined bending process is performed (the shape is the same as that of the 6th hoop).
(shown by dotted lines in FIG.
1 protrudes above the upper surface portion 21d.

The coil block 1 and the contact block 20 are assembled by superimposing them in the direction of arrow a, which is the contact driving direction, that is, by storing the coil 9 of the coil block 1 in the four parts 2Z of the contact block 20. At this time, the flange 11 of the spool 10
The protrusion 14.14 protruding from a and llb is fitted into the hole 2B, ``lB'' formed in the side wall 21C of the insulating stand 21. Alternatively, the tips of the protrusions 14.14 may be melted by thermal caulking, ultrasonic welding, etc. Also, the protrusions of the iron core 2 may include the magnetic pole face 8a,
3b is opposite to II (7) 11 surfaces 4a and 4b are formed at both ends of the upper surface portion 21d of the insulating stand 21, forming a friend notch @24a.

The step portions 18a and 13b formed on the stand portions 12a and 12b of the spool 10 contact the bottom portion 21 of the insulating stand z1.
By coming into contact with notches 25a and 25b formed at the l+11 end of e, each block l and 20 move in the contact driving direction a.
is positioned.

The movable iron piece 40 is made of a rectangular rod-shaped member, and as shown in FIG.

11b, and both end sides are attached to the magnetic pole faces 3a, 3 of the iron core 2.
b. Specifically, one end of the movable iron piece 40 is attached to an elastic claw portion 15 formed on the collar portion 11a.
5 is attached by once elastically bending in the direction of the arrow. At this time, the lower surface of the movable iron piece 40 is the flange portion 11a.
c!
7 is positioned in the longitudinal direction, and the notch surface 43 abuts against the claw portion 15 to prevent upward removal.

In this way, one end of the movable iron piece 40 is supported with some play on the collar portion 11a, and is rotatable on the horizontal plane using this support portion as a fulcrum.

The contact drive card 50 is made of a suitable synthetic resin, and as shown in FIG. By engaging the formed groove portion 52 with the cutout projection piece 81 formed at the tip of the movable contact piece 30, it is attached between the movable iron piece 40 and the movable contact piece 30.At this time, the collar of the seven pools 10 The elastic claws 16, 26 formed on the portion 11b and the insulating base 21 are once bent in the direction of arrow C and engaged with the notches!$@58. By engaging with the notch groove 53, removal upward and in the direction of arrow C is prevented, and rotational movement in the direction of arrow a and a is guided.

That is, when assembled, the non-electromagnetic relay consists of the coil block 1, the contact block 20, the movable iron piece 40, the card 50, and the cover 60, and as described above, the two blocks 1 and 2 are assembled.
The movable iron piece 40 is integrated by overlapping in the 1Ji direction.
Attach the card 50 from above in this order, and cover the cover 60 from above. The cover 60 is fixed by having four parts (not shown) fitted to protrusions 27, 27 formed at both ends of the insulating stand 21.

In this case, the coil 9 is housed in the recess 2217 of the insulating stand 21, and the contact part and movable iron piece 40. The card 50 will be located above the coil 9. Therefore, the installation space (projected area) of this electromagnetic relay depends solely on the size of the coil 9, and the contact portion, movable iron piece 40, and card 50 do not increase the installation space.

1 and 5 when the coil 9 is not energized.
As shown in the figure, the card 50 is biased in the two directions of the arrows by the spring force of the movable contact piece 30 itself, and the movable iron piece 50
It rotates in the direction of arrow a using the 1a side as a fulcrum, and is possible @contact 32
is closing the normally closed II identification contact M. through coil 9.
4, the movable iron piece 50 rotates in the direction of the arrow 3 and the iron/U
The card 50 is attracted to the magnetic pole surface 31.3b of the arrow 3.
The movable contact 82 switches to the normally open internal contact, Q36.

In this example, block 1. Although the side surfaces 4a and 4b of the iron core 2 were used as one of the positioning and securing parts of zO,
Alternatively, part or all of the spool 10 may be used.

As is clear from the above description, the present invention enables a coil block including a coil and an iron core, and a contact block including a contact portion to be stacked in a seven-contact driving direction, and is secured to each other at the four corners of each block. Forming a positioning and retaining part L'f7:,
Therefore, the number of parts during assembly is greatly reduced, each block is integrated by insert molding with a resin molded product that can be made with high precision, and both blocks are stacked and connected in the contact drive direction. In addition, the accuracy after assembly is improved and the process of adjusting contact pressure etc. can be omitted.

[Brief explanation of the drawing]

The drawings show one embodiment of the electromagnetic relay according to the present invention.
2 are perspective views, FIGS. 8 and 4 are exploded perspective views, FIG. 5 is a plan view, FIG. 6 is a front view, and FIGS. 7 and 8 are left and right 11111 side views. l...Coil block, 2...Iron/shir, 3a
, 3b... magnetic pole surface, 4a, 4b... side surface,
9...Coil, IO...Spool, 13a, 18
b...Engaging step portion, 14...Fitting protrusion, 20...
Connection 7Q block, 21... Insulation stand, 23...
Fitting hole, z4a, 24b...Engagement notch, 25a
, 25b...Engagement notch, 3(J, 88.85...
Contact piece, 4o... Movable iron piece, 50... Contact drive card. Patent applicant: Tateishi Electric Co., Ltd. Agent: Patent attorney Hajime Aoyama and two others Figure 1

Claims (1)

[Scope of Claims] (II. A coil block in which a spool is fixed by insert molding around a flat U-shaped secondary iron core, a coil is wound around the spool, and at least one pair of coil blocks forming a contact part. Possible @ A contact piece and a fixed contact piece are fixed on an insulating stand by insert molding, and the coil block and contact block are stacked in the contact driving direction. 1. An electromagnetic relay, which is capable of being combined, and has fitting parts that fit into each other when stacked on each block, and positioning and securing parts that engage with each other are formed at the four corners of each block. (2) The electromagnetic relay according to claim 1, wherein one of the positioning and securing parts on the coil block side is engaged with a protruding part of an iron core attached to the spool.