JPS6331478Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of the Invention The present invention relates to a type of polarized relay in which a contact part is driven by a movable part that moves by exciting an electromagnet.

(b) Conventional technology and problems In recent years, this type of polarized relay is often used by being mounted on a printed circuit board together with general electronic components, and miniaturization has become an important issue.

By the way, as this type of polarized relay, there is, for example, Japanese Unexamined Patent Publication No. 57-30232. This bulletin includes
An electromagnet with a coil 33 wound around the central leg 32 of an E-shaped fixed iron core 31, a permanent magnet 35, and an iron piece 3.
6 and 37 and a movable element 34 disposed between a central leg 32 and outer legs 38 and 39, and a self-holding electromagnetic relay that further embodies this magnetic circuit. ing.
(See Figure 1) However, since the electromagnetic relay uses an E-shaped iron core to form the electromagnet, the outer legs 38 and 39 for forming the two magnetic gaps sandwich the coil winding part. Therefore, there was a drawback that the size of the electromagnet in the width direction (the moving direction of the mover 34) was larger than the size of the coil winding portion by the amount of the outer leg.

Furthermore, in this type of polarized relay,
Although it is structurally simple to arrange the contact mechanism in the width direction of the electromagnet (movement direction of the movable element), when using an electromagnet with an E-shaped core like the above-mentioned electromagnetic relay, the outer legs 38 and 39 of the core are Not only is this a problem, but the outer legs 38 and 39 also have the disadvantage that there is wasted space above them, which increases the size of the relay as a whole.

(c) Purpose of the invention The present invention is intended to eliminate the drawbacks of the above-mentioned conventional example, and focuses particularly on the structure of the core of the electromagnet, and by improving this, a smaller polarized relay can be created. The purpose is to provide.

(d) Structure and effects of the invention This invention consists of an iron core around which a coil is wound so that at least one end is exposed, and a tip formed in a U-shape and positioned so as to sandwich one end of the exposed iron core from both sides. an electromagnetic block consisting of a yoke that forms two magnetic gaps on both sides of one end and extends a U-shaped bottom and whose rear end is fixed to the other end of the iron core, and a pair of iron pieces at both ends of the permanent magnet. One end of each of the iron pieces contacts a movable element inserted into the magnetic gap, a movable block that holds the movable element and is made movable by excitation of the coil, and the movable block as the movable block moves. It is characterized by comprising a contact mechanism that can be separated.

According to this invention, the legs of the iron core are no longer present on both sides of the coil winding portion, and the size of the electromagnet, particularly in the width direction (movement direction of the movable element), can be reduced. Therefore, when configuring a polarized relay by placing contact mechanisms on both sides of an electromagnet, the contact mechanism can be placed right next to the electromagnet, and the space required for the legs is reduced compared to conventional ones. The width of the pole relay can be reduced. In addition, there is no wasted space due to the legs, and the conventional E
It is possible to form a smaller polarized relay compared to one using a letter-shaped iron core.

(E) Embodiment An embodiment of the present invention will be described below in detail with reference to figures.
In FIGS. 2 and 3, 7 is a coil spool around which a coil 8 is wound, and a collar 9 at the rear end is provided with a terminal 9a for drawing out the coil core wire, and a collar 1 at the front end is provided.
0 is provided with two guide protrusions 10a extending upward in an L shape at the same height. 11 is head 1
3, when the iron core 12 is inserted into the insertion hole 11, the head 13 protrudes from the front part of the collar 10, and the rear end 14 of the iron core is inserted into the rear part of the main body plate 16 of the yoke 15. It is fitted into the through hole 18 of the upright plate 17 provided in the. In this state, the main body plate 16 is parallel to the iron core 12 and the coil 8. The yoke 15 includes a rear end 17 of a T-shaped body plate 16 and both ends 1 of the T-shape.
The head 13 of the iron core 12 is located between opposing plates 19 and 19 which are bent at right angles and branched at the front end of the yoke, and there is a gap between both sides of the head 13 and the opposing plate 19. (working gap) is formed. Reference numeral 20 denotes a U-shaped movable block in which a permanent magnet 21 is sandwiched between two magnetic side plates 22 in the direction of magnetization, assembled in a U-shape when viewed from above, and fitted into a holding cylinder 23. The holding cylinder 23 is a short cylindrical body, and the rear lower half is removed, from which both side plates 22 are exposed. Reference numeral 24 denotes a card portion extending in both lateral directions at the upper rear end of the holding tube 23, and a notch 25 is provided at the lower edge of each card portion. When the card portion 24 is fitted into the groove formed by the guide protrusion 10a so as to be slidable laterally, both side plates 22, 2 of the movable block 20 are inserted.
2 are the head 13 of the iron core and the opposing plate 1 of the yoke, respectively.
9 and can move laterally. In this case, the movable contact plate 27 of the contact portion 26 is engaged with the notch 25 of the card portion 24 . 28 is a cover provided on the main body 29 of the relay.

The above relay has a coil 8 as shown in Figure 4.
When a current is applied to the iron core 12 and the iron core 12 is excited in the direction of the arrow m, the iron core head 13 becomes the south pole, the facing plates 19 of the yoke become the north pole, and the movable block 2
0 moves in the direction of arrow k1. In conjunction with this lateral movement of the block 20, the movable contact plate 27 moves to open and close the contact portion 26.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a conventional example, Fig. 2 is an exploded perspective view of an embodiment of the present invention, Fig. 3 is an exploded perspective view of the above when only the main parts are assembled, and Fig. 4 is an exploded perspective view of the present invention. FIG. 2 is a simplified perspective view of main parts for explaining the configuration of a polarized relay. In the figure, 7...Coil spool, 9...Brim portion,
10...Brim part, 11...Iron core insertion hole, 12...
Iron core, 15...Yoke, 16...Yoke main plate, 18...Fitting hole at rear end of iron core, 19...Yoke branch opposing plate, 20...Movable block, 21...
. . . Permanent magnet, 22 . . . Iron side plate, 23 .

Claims (1)

[Claims for Utility Model Registration] An iron core around which a coil is wound so that at least one end is exposed, and a tip formed in a U-shape and positioned so as to sandwich one end of the exposed iron core from both sides. an electromagnetic block consisting of a yoke that forms two magnetic gaps between the magnets and has a U-shaped bottom extending and whose rear end is fixed to the other end of the iron core; and a pair of iron pieces provided at both ends of the permanent magnet. a movable element in which one end of each iron piece is inserted into the magnetic gap; a movable block that holds the movable element and is movable by excitation of the coil; and a contact mechanism that is moved toward and away from the movable block as the movable block moves. A polarized relay equipped with the following.