JPS58128621A - 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 an electromagnetic relay, and particularly to a support structure for a movable iron piece thereof.

Conventionally, as a support structure for a movable iron piece in a hinge-type electromagnetic relay, as shown in FIG. A U-shaped movable iron piece 4 is inserted into the holes 3 and 3 formed in the
A device in which the protrusions 5, 5 were fitted was provided.

However, this method not only requires a separate part called the support metal fitting 2, but also requires complicated processing for fitting the support metal fitting 2 and the movable iron piece, making the assembly work complicated and reducing the dimensional accuracy of the parts. It also had the drawbacks of poor assembly accuracy and high cost.

The present invention has been made in view of these drawbacks, and its purpose is to be able to rotationally support a movable iron piece with a simple structure and with high accuracy without requiring separate parts such as supporting metal fittings. To provide an electromagnetic relay that is easy to assemble and can be manufactured at low cost.

Hereinafter, the present invention will be explained with reference to FIG. 2 and subsequent figures, which are one embodiment.

First, the electromagnetic relay according to the present invention is schematically shown in FIGS. 2 and 3.
As shown in the figure, a coil glock 1 and a contact block 20
, a movable iron piece 40 , a contact drive card 50 , and a cover 60 .
(see figure), and based on this movement, the movable contact 32 is switched with respect to the fixed contact 34 and 36.

The coil block 1 has a spool 10 fixed around a flat U-shaped iron core 2 by insert molding. Both ends of the iron core 2 protrude upward from the spool 10, and one side of this protruding portion is a magnetic pole face 31. .3b. Further, the flange portions 11a at both ends of the spool 10, and the base portion 12a formed at the lower part of the llb.

A coil terminal 5 is attached to 12b by insert molding, and the core wire of the coil 9 wound around the spool 10 is connected to this coil terminal 5 by /\\blade attachment.

The contact block 20 has a movable contact piece 30. A normally closed side fixed contact piece 33 and a normally open side fixed contact piece 35 are fixed to the insulating stand 21 by insert molding, and the lower part of each contact piece 30, 33, 35 projects downward from the insulating stand 21. As shown in FIG. 3, this insulating stand 21 has three side walls 21a, 21
It has a substantially box shape having a recess 22 surrounded by a top surface portion 21d and a bottom surface portion 21e. In addition, each contact piece 3
0.33゜35 is punched out into a predetermined shape from a piece of hoop material, the contacts 32, 34, and 36 are fixed and a predetermined bending process is performed (the shape is shown in Fig. 5).
(shown by dotted lines in FIG. 7), is integrally insert-molded with the insulating base 21, and each contact 32, 34.degree. 36 protrudes above the upper surface 21d of the insulating base 21.

The coil block 1 and the contact block 20 are assembled in such a way that the coil block 1 and the contact block 20 are superimposed in the direction of arrow a, which is the contact driving direction, that is, the coil 9 of the coil block 1 is housed in the recess 22 of the contact block 20. Tsuba part 1
1a, protrusion 14.14 protruding from llb or insulating stand 2
It is fixed by fitting into the holes 23.23 formed in the side wall portion 2IC of the first side. Fixation may be achieved not only by simple press-fitting, but also by using a bonding agent, or by temporarily melting the tips of the protrusions 14, 14 by heat caulking, ultrasonic welding, or the like. In addition, the protruding portions of the iron core 2 and the above-mentioned magnetic pole faces 3a, 3
The side surfaces 4a and 4b opposite to b are the upper surface portion 2 of the insulating stand 21.
Abuts on notches 24a and 24b formed at both ends of 1d,
A base portion 12a of the spool 10.

The step portions 13a and 13b formed on the insulating base 21 form a notch 25a at both ends of the bottom surface portion 21e.

25b, each block 1, 20 is positioned in an arbitrary drive direction a.

-==r The moving 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.
It 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.
It is supported by the upper end surface, the civil part 41 abuts against the vertical surface of the flange part 11a, and the notch surface 42 abuts against the claw part 15, thereby being positioned in the longitudinal direction ◆.
By coming into contact with this, upward removal is prevented. In this manner, 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 bale point drive card 50 is made of a suitable synthetic resin, and from above, a recess 51 formed at one end is engaged with a step 44 formed at the tip of the T-moving iron piece 40, and a groove 52 formed at the other end is engaged with the movable part 51 formed at one end. ] Notched projection piece 31 formed at the tip of the concubine touch piece 30
By engaging with the movable iron piece 40 and the movable contact piece 3
It is installed between 0 and 0. At this time, the claw portion 1 having elasticity formed on the collar portion 11b of the spool 10 and the insulating stand 21
6 and 26 are once bent in the direction of arrow C and engaged with the notch groove 53. That is, the card 50 is prevented from being removed upward and in the direction of arrow C by engaging with the claws 16 and 26 or the notch groove 53, and is guided from moving in the directions of arrows a and a.

That is, when assembled, this electromagnetic relay consists of a coil block 1, a contact block 20, a movable iron piece 40, a card 50, and a cover 60.
The movable iron piece 40 and the card 50 are attached from above in this order, and a cover 60 is covered from above. Note that the cover 60 is fixed by engaging the not-shown recesses with the protrusions 27, 27 formed at both ends of the insulating stand 21.

In this case, the coil 9 is housed in the recess 22 of the insulating stand 21, and the contact portion, the movable iron piece 40, and the card 50 are located above the coil 9. Therefore, the installation space (projected area) of this electromagnetic assembly 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.

2 and 4 when the coil 9 is not energized.
As shown in the figure, the card 50 is biased in the direction of the arrow I by the spring force of the movable contact piece 30 itself, and the movable iron piece 50 rotates in the direction of the arrow I with the flange 11a as a fulcrum, and the movable contact 3
2 closes the normally closed fixed contact 34. When the coil 9 is energized, the movable iron piece 50 rotates in the direction of the arrow 3 and the iron core 2
The card 50 is attracted to the magnetic pole surfaces 3a and 3b of the card 50, moves in the direction of the arrow a, and the movable contact 32 is switched to the normally open fixed contact 36.

That is, in one aspect of the present invention, one end of the movable iron piece 40 is connected to the flange 11.
It is rotatably supported on a horizontal plane in a loosely fitted state by an elastic pawl 15 integrally protruding from the upper end surface of a and this flange 11a, and does not require any particular support metal fittings or the like. Moreover, the claw part 1
The coil block 1 (
The overall structure of this electromagnetic relay is improved by making it easy to install, by making the coil part and contact part into blocks so that they can be connected laterally, and by making it possible to install the card 50 from above. Assembly work can be extremely simplified.

Note that the movable iron piece 40 is not necessarily limited to that of the above embodiment, and may be replaced with the cutout surface 42.

A pin may be provided protruding from the upper surface of one end of the movable iron piece 40 and this pin may be engaged with the claw portion 15.

As is clear from the above description, the present invention provides an elastic claw part integrally provided at one end flange of a spool provided around a flat U-shaped iron core. Since one end of the movable iron piece is rotatably supported by the end face and one of the magnetic pole faces of the iron core, the movable iron piece can be freely rotated with a simple configuration without the need for separate parts such as the conventional support fittings mentioned above. The assembly can be easily supported and manufactured at low cost. Moreover, since the pawl portion is integrally provided with the flange portion at one end of the spool, the dimensional accuracy is excellent and the movable iron piece can be assembled with high accuracy.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing the main parts of a conventional electromagnetic relay, and Fig. 2 and the following show an embodiment of the electromagnetic relay according to the present invention.
Fig. 2 is a perspective view, Fig. 3 is an exploded perspective view, Fig. 4 is a plane view, Fig. 5 is a front view, and Figs. 6 and 7 are left and right side views. l...Coil block, 2...Iron core, 3a, 3b
... Magnetic pole surface, 10... Spool, lla... Flange part, 15... Claw part, 20... Contact block, 40...
- Movable iron piece, 41...stepped portion, 42.43...notch surface, 50...contact drive card. Patent applicant: Tateishi Electric Co., Ltd. Agent: Patent attorney Hajime Aoyama and 2 others

Claims (1)

[Claims] (1) An elastic claw is integrally provided on the flange at one end of the spool provided around the flat U-shaped iron core, and the claw, the upper end surface of the flange at one end, and one magnetic pole surface of the iron core are connected to each other. An electromagnetic relay characterized by having one end of a movable piece of iron rotatably supported.