JPH04328220A - Electromagnet fixing device for electromagnetic relay - Google Patents

Abstract

PURPOSE:To make fixation so that electromagnet will not slip off from the base. CONSTITUTION:Side edges 3b of a yoke 1 are inserted in grooves 7 in a base 4, and thus location is made. The shoulder 14 of each coil terminal 12 is combined with grooves 16 in the base 4, and projections 15 on the coil terminals 12 are inserted in holes 17 in a flange 10a provided on the bobbin 10 of a solenoid coil 9, wherein they 12 are fitted in such a way as striding over the flange 10a and base 4. Thereby the base 4 and flange 10a are pinched in a notch 13, and the electromagnet is fixed so that it will never slip off upward from the base 4.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay, and more particularly to a device for fixing the electromagnet to a base.

0002

2. Description of the Related Art FIG. 3 is an exploded perspective view of a yoke and a base showing a conventional structure. In the figure, 1 is an L-shaped yoke that constitutes a part of the electromagnet, and one leg 2 is connected to one end of a bar-shaped iron core (not shown) by caulking or the like, and this iron core has a wire (not shown) wound around a bobbin. An electromagnetic coil is attached. 2a is a hole into which the caulked portion of the iron core is inserted. Further, an L-shaped armature is rotatably held in the notch 3a of the other leg 3 of the yoke 1, and one of the legs faces the polarized surface of the other end of the iron core.

Reference numeral 4 denotes a base made of an insulating material, in which the electromagnet is accommodated in a box-shaped recess 5, while a pair of fixed contact terminals are fixed in the slit holes 4a and 4b, and a common terminal is fixed in the slit hole 4c by press fitting. be done. Here, a pair of left and right grooves 7 partitioned by a prismatic rib 6 is formed at one end of the recess 5, and the electromagnet is inserted into the groove 7 from above with both side edges 3b of the other leg 3 of the yoke 1. It is positioned on the base 4.

The common terminal is electrically connected to one end of a movable leaf spring mounted on the other leg of the armature, and the movable contacts attached to both sides of the other end of the movable leaf spring sandwich this and connect to the fixed contact terminal. The structure is such that it comes into contact with and separates from the fixed contact attached to the. The movable contact and the fixed contact constitute a so-called c-contact, and the illustrated conventional example is an electromagnetic relay having two c-contacts.

[0005]

[Problems to be Solved by the Invention] However, in such a conventional structure, the electromagnet positioned by inserting the leg 3 of the yoke 1 into the groove 7 is not connected to the wall of the recess 5 in the longitudinal and lateral directions of the base 4. 5a and ribs 6, but in the insertion direction, although it is held to some extent by the tightness due to press-fitting, there is no reliable means of fixing, and as a result, the electromagnet may be removed from the base 4 due to vibrations caused by the opening/closing operation of the electromagnetic relay. There is a problem in that the contact condition between the movable contact on the electromagnet side and the fixed contact on the base 4 side changes, affecting the operating characteristics of the electromagnetic relay. SUMMARY OF THE INVENTION An object of the present invention is to provide an electromagnet fixing device for an electromagnetic relay that has a simple structure to prevent the electromagnet from coming off the base and stabilizes the operating characteristics of the electromagnetic relay.

[0006]

[Means for Solving the Problems] In the present invention, a coil terminal of an electromagnet is fitted across the base and the collar of the bobbin of the electromagnetic coil on the side that contacts one leg of the yoke, and this electromagnet is connected to the base. It shall be fixed so that it does not slip out of the groove in the base.

[0007]

According to the present invention, since the bobbin of the electromagnetic coil is locked to the base via the coil terminal, there is no possibility of the electromagnet slipping out from the base. The coil terminal is essentially necessary for the electromagnetic relay, and since the above-mentioned locking is achieved by fitting the coil terminal, there is no need to add any special parts and the assembly work is simple.

[0008]

Embodiments Hereinafter, embodiments of the present invention will be explained based on FIGS. 1 and 2. Here, FIG. 1 is an exploded perspective view of the electromagnet and the base, and FIG. 2 is a perspective view of the assembled state. Note that the same reference numerals are used for parts corresponding to those in the conventional example. In the figure, 8 is a round bar-shaped iron core, and 9 is an electromagnetic coil attached to this core. The iron core 8 is caulked to the yoke 1 at the lower end in the figure, and a large-diameter head 8a is integrally formed at the upper end, the upper surface of which serves as an armature surface that attracts an armature (not shown).

The electromagnetic coil 9 is composed of a bobbin 10 having flanges at both ends and a winding 11 wound around the body of the bobbin, and is attached to the iron core 8 from its lower end before connecting the yoke 1 and the iron core 8. Thereafter, the core 8 is caulked to be held between the yoke 1 and the core head 8a. Such an electromagnet is housed in the recess 5 of the yoke 1,
At this time, both side edges 3b of the other leg 3 of the yoke 1 are inserted into a pair of left and right grooves 7 cut into the side wall of the base 4 from the upper end, and positioning is performed in the front and rear and left and right directions.

On the other hand, reference numeral 12 designates a pair of coil terminals connected to the lead wire of the winding 11, which are fitted across the base 4 and the collar 10a of the bobbin 10 on the side that contacts the leg 2 of the yoke 1. It looks like this. That is, the edge of the coil terminal 12 on the base 4 side has a shoulder 14 and a protrusion 1 with the notch 13 in between.
5 is formed. On the other hand, an L-shaped groove 16 corresponding to the shoulder 14 is formed at the end of the base 4 from the front surface to the bottom surface, and a hole 17 corresponding to the protrusion 15 is formed in the collar 10a, and a hole 17 corresponding to the protrusion 15 is formed on the front surface thereof. Connecting upper and lower grooves 1
8 is formed.

Therefore, after inserting the electromagnet into the base 4,
The coil terminal 12 is fitted to the base 4 and the collar portion 10a by assembling the shoulder portion 14 with the groove 16 and inserting the protrusion 15 into the hole 17. As a result, the coil terminal 12 sandwiches the base 4 and the flange 10a inside the notch 13, and inserts the electromagnet into the base 4 in the direction of insertion (vertical direction in the figure).
Fixed to. In addition, the rising portion 12 of the coil terminal 12
a fits within the groove 17, and its back surface is flush with the collar portion 10a and the front surface of the base 4. Although not shown in the drawings, the upper end of the rising portion 12a of the coil terminal 12 is mechanically held by being engaged with a pair of left and right terminal fittings insert-molded in the upper collar portion 10b of the bobbin 10. electrically connected. This terminal fitting has 11 windings.
The lead wire is tangled.

According to the illustrated configuration, the electromagnet consisting of the yoke 1, the iron core 8 and the electromagnetic coil 9 is attached to the collar 1 of the bobbin 10.
Since it is locked to the base 4 by the coil terminal 12 that fits across the 0a and the base 4, it is completely fixed to the base 4 in all directions, up and down, front and back, left and right, and the electromagnetic relay can be opened and closed. Unlike conventional configurations, there is no need to worry about the device falling out of the base 4 due to vibrations during operation. Moreover, since this locking is done by the coil terminal 12, no additional parts are required.
Furthermore, since fitting is possible by insertion from one direction, assembly work is simple and automation is also easy.

[0013]

[Effects of the Invention] According to the present invention, the coil terminal is fitted across the collar of the electromagnetic coil bobbin and the base, thereby ensuring that the electromagnet can be removed from the base without increasing costs. It is possible to prevent this and stabilize the operating characteristics of electromagnetic relays.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of an electromagnet and a base showing an embodiment of the invention.

FIG. 2 is a perspective view of the assembled electromagnet and base of FIG. 1;

FIG. 3 is an exploded perspective view of a yoke and a base showing a conventional example.

[Explanation of symbols]

1 York 4 Base 7 Groove 8 Iron core 9 Electromagnetic coil 10 Bobbin 10a Brim 12 Coil terminal

Claims (1)

[Claims] [Claim 1] One leg of an L-shaped yoke is connected to one end of a bar-shaped iron core to which an electromagnetic coil is attached, and an armature whose polarization surface is the other end of the iron core is held by the other leg of the yoke. The electromagnet is positioned by inserting both side edges of the other leg of the yoke into a groove in the base of the insulator, and the electromagnet is positioned in the bobbin of the electromagnetic coil on the side in contact with one leg of the yoke. 1. An electromagnet fixing device for an electromagnetic relay, characterized in that a coil terminal of the electromagnet is fitted across the flange of the electromagnet and the base, and the electromagnet is fixed so as not to slip out of the groove of the base.