JPH0514371B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to an electromagnetic relay used mainly for automobiles.

"Conventional Technology" Recently, there is a need for further downsizing of automotive relays due to constraints on installation space. however,
When the device is miniaturized, it is generally difficult to assemble it, and for one thing, it is difficult to form the most important contact circuit. For example, the conventional electromagnetic relay shown in Japanese Utility Model Application Publication No. 57-50937 has been made smaller by fitting and press-contacting the protruding piece of the yoke in the electromagnetic mechanism unit to the tooth receiver of the common terminal in the base unit, thereby creating electrical continuity. This is aimed at ease of assembly, but since the yoke and the common terminal are only electrically connected by fitting, and the soft iron yoke is largely interposed in the contact circuit, it is common to these yokes. The resistance of the contact circuit passing through the terminals was large, and the yoke easily came off from the common terminal due to vibrations, resulting in concerns about reliability.

"Problems to be Solved by the Invention" The present invention has been made in view of the above-mentioned problems.The resistance of the contact circuit is small, and the electromagnetic mechanism unit can be stably fixed to the base unit. An object of the present invention is to provide an electromagnetic relay that can be easily assembled and miniaturized.

"Means for Solving the Problems" According to the present invention, a multi-pole Faston type connector is integrally molded, and two
A base is formed with a pillar-shaped built-up part, a bridge part is formed to bridge the upper parts of these pillar-shaped built-up parts, a terminal part is fitted into one connector pole of the base, and a body part is connected to the base. a movable contact terminal whose overlapped portion extends upward from the body along the upper surface and is located directly below the bridge portion of the base; and an electromagnetic coil disposed perpendicularly to the upper surface of the base. A yoke whose horizontal side is caulked and fixed by a rod-shaped core, whose hanging side runs along the side surface of the electromagnetic coil and is press-fitted and supported by both pillar-shaped built-up parts of the base, and a yoke whose horizontal side is caulked and fixed by a rod-shaped core, and whose hanging side is press-fitted and supported by both pillar-shaped built-up parts of the base; an L-shaped movable contact spring whose sides are joined and fixed, and whose lateral side to which a movable iron piece is fixed faces the lower surface of the core, the spring and the yoke are joined at the hanging side of the yoke; There is provided an electromagnetic relay characterized in that the overlapping portion of the movable contact terminal is fixedly connected to the yoke at a position close to the fixed portion.

"Function" According to the above configuration, since both the movable contact spring and the movable contact terminal are fixedly connected to the hanging side of the same yoke, the contact circuit becomes short.
The resistance of this contact circuit is reduced, and the joined and fixed portion is held down from above by the bridge portion of the base, so that the electromagnetic mechanism unit is stably fixed to the base unit and will not come off.

"Example" Next, an example of the present invention will be described with reference to the drawings.

Figure 1 is a front view of the assembled state of the electromagnetic relay according to this embodiment, Figure 2 is a perspective exploded view of the base unit, Figure 3 is a perspective exploded view of the electromagnetic mechanism unit, and Figure 4 is the base unit and the electromagnetic mechanism unit. Figure 5 is a front exploded view to explain how to assemble the
6 is a right side view of FIG. 1, and FIG. 6 is a left side view of FIG.

The electromagnetic device of this embodiment consists of a base unit and an electromagnetic mechanism unit. First, the structure of the base unit will be explained with reference to FIGS. 1 and 2. A 4-pole Faston type connector FC is integrally molded on a rectangular block-shaped base 1 made of resin molding. The base 1 has two columnar built-up parts 101 and 102 formed on one side of its upper surface.
A square hole portion 1C is formed on the other side of the top surface. Further, a bridge portion 1d is formed by bridging both columnar built-up portions 101 and 102, and both built-up portions 10
Grooves 1a and 1b are formed in the grooves 1 and 102, respectively. The movable contact terminal 2 and the terminal portions T of the coil terminals 3 and 4 are press-fitted into the Faston type connector FC of the base 1, thereby forming a base unit. The body P of the movable contact terminal 2 is along the upper surface of the base 1,
An overlapped portion 2b extending upward from the body portion P is located directly below the bridge portion 1d.

The structure of the electromagnetic mechanism unit will be described with reference to FIGS. 1 and 3. A yoke 5 forming a magnetic circuit is brought into contact with the upper surface of an electromagnetic coil 6 at its horizontal side P via a spool 7, and 5 and the electromagnetic coil 6 are caulked and fixed.
The fixed contact terminal 9 has a fixed contact 10 on its horizontal side P.
The fitting portion 9a at the base of the horizontal side P is press-fitted into the groove 7a of the spool 7, and the protrusion 9b at the tip is press-fitted into the square hole 7b of the spool 7. An L-shaped movable contact spring 12 having a movable contact 11 has a movable iron piece 1 on the upper surface of its horizontal side P.
3 is caulked and fixed, a joint portion 12a extending upward from this horizontal side P is joined and fixed to a hanging side V of the yoke 5 along the side surface of the electromagnetic coil 6 by welding. As a result, the horizontal sides P of the movable iron piece 13 and the spring 12 are opposed to the lower surface of the core 8,
The electromagnetic mechanism unit is completed.

``Operation'' With reference to FIGS. 4 to 6, the method of assembling the base units 1 to 4 shown in FIG. 2 and the electromagnetic mechanism units 5 to 13 shown in FIG. 3 will be explained as operations. As shown in FIG. 4, when the electromagnetic mechanism units 5 to 13 are pushed up in the vertical direction as shown by arrow D from above the base units 1 to 4, the base 1
The press-fitting part 9c of the fixed contact terminal 9 is press-fitted into the square hole part 1c of the base 1, and both columnar build-up parts 10 of the base 1
The electromagnetic mechanism units 5-13 are fixed to the base units 1-4 by press-fitting the protrusions 5a, 5b on both sides of the yoke 5 into the grooves 1a, 1b in the base units 1, 102, respectively. Coil wire terminals 6a and 6b of the electromagnetic coil 6 are connected to connecting portions 3a and 4a at the upper ends of the coil terminals 3 and 4, respectively. Furthermore, a movable contact terminal 2 located directly below the bridge portion 1d
The joint part 2c at the tip of the overlapping part 2b is joined and fixed to the side surface of the hanging side V of the yoke 5 by welding or the like. At this time, the overlapped portion 2b extending above the movable contact terminal 2 overlaps the joint portion 12a at the tip of the movable contact spring 12. The state after such joining is as shown in FIG.
is overlapped with the outer surface of the joint portion 12a of
The joint portion 2c of the movable contact terminal 2 is located directly below the bridge portion 1d of the base 1.

Further, a backstop 2a provided at the other end of the horizontal body P of the movable contact terminal 2 supports the tip of the movable contact spring 12 from below, as shown in FIG. 11
The gaps are adjusted so that they are at predetermined intervals. That is, the fixed contact 10 and the movable contact 11
constitutes a normally open contact, and when both coil terminals 3 and 4 shown in the lower part of FIG. Closed. Then, the load current flows from the fixed contact terminal 9 to the both contacts 1.
0, 11, spring 12 for movable contact, yoke 5
and flows to the contact circuit via the movable contact terminal 2.

Case 14 for storing the electromagnetic mechanism unit
As shown in FIG. 5, the convex portion 14a of the case 14 is engaged and fixed in the concave portion 1e of the base 1. The base 1 is also provided with a concave portion of the same shape in an axially symmetrical portion, and another convex portion 14a of the case 14 is locked therein.

Since the present embodiment has the above configuration, the joint part 2c of the movable contact terminal 2 and the joint part 12a of the movable contact spring 12 are both joined to the same hanging side V of the yoke 5, so that the quasi-electricity is low. There is an advantage that the contact circuit including the yoke 5 made of soft iron can be made as short as possible, the resistance of the contact circuit can be reduced, and heat generation can be suppressed to a low level.
Moreover, the overlapped portion 2b at the upper end of the movable contact terminal 2,
By overlapping the overlapping portion 12a of the movable contact spring 12, there is an advantage that the heat generated by the spring 12, which becomes high in temperature, can be dissipated through the movable contact terminal 2.

Since both columnar build-up parts 101 and 102 provided on one side of the upper surface of the base 1 are bridged and connected by the bridge part 1d, both columnar build-up parts 101 and 102 are reinforced, so that the yoke 5 It is possible to improve the pull-out strength of the yoke 5.
It is possible to prevent deformation of both the built-up parts 101 and 102 having the grooves 1a and 1b during press-fitting, and there are advantages such as the ability to stabilize the pull-out strength of the yoke 5 and minimize the decrease in strength due to environmental changes. .

By positioning the joint portion 2c at the upper end of the movable contact terminal 2 directly below the bridge portion 1d of the base 1, it is possible to prevent the movable contact terminal 2 from being press-fitted into the Faston type connector FC of the base 1 by falling or vibration. When a pull-out load opposite to the
It can come into contact with and act as a stopper.
Similarly, both built-up parts 101 and 10 on the yoke 5
Since the movable contact terminal 2 and the yoke 5 are connected to each other even when a pull-out load is applied in the opposite direction to the press-fitting direction to the yoke 5, the bridge portion 1d has the advantage that it can act as a stopper as described above. There is.

"Other Embodiments" In the above-described embodiments, the fixed contact terminal 9 of the electromagnetic mechanism unit was press-fitted into the spool 7 of the electromagnetic coil 6. You may do so.

"Effects" As stated above, since the electromagnetic relay of the present invention has the above configuration, the resistance of the contact circuit is small.
Moreover, the electromagnetic mechanism unit can be stably fixed to the base unit, and there are many excellent effects such as ease of assembly and miniaturization.

[Brief explanation of drawings]

Fig. 1 is a front view of an assembled state of an electromagnetic relay according to an embodiment of the present invention, Fig. 2 is a perspective exploded view of the base unit, Fig. 3 is a perspective exploded view of the electromagnetic mechanism unit, and Fig. 4 shows the base unit and electromagnetic relay. 5th front exploded view for explaining the assembly direction with the mechanical unit.
The figure is a right side view of FIG. 1, and FIG. 6 is a left side view of FIG. 1. 1... Base, 1d... Bridge part, 101, 10
2... Column build-up part, 2... Movable contact terminal, 2b... Overlapping part, 2c... Joint part, 5... Yoke, 6... Electromagnetic coil, 8... Core, 12... Spring for movable contact, 1
2a...Joint part, 13...Movable iron piece, FC...Faston type connector.

Claims (1)

[Claims] 1. A multi-pole Faston type connector FC is integrally molded, and two columnar padding parts 10 are provided on one side of the top surface.
1 and 102 are formed, and bridge portion 1d bridges the upper portions of both columnar built-up portions 101 and 102.
A base 1 in which a terminal part is fitted into the FC1 pole of the connector of the base 1, a body part runs along the upper surface of the base 1, and an overlapping part 2b extending upward from the body part is connected to the base 1. The horizontal side of the movable contact terminal 2 located directly below the bridge portion 1d of 1 and the upper surface of the electromagnetic coil 6 disposed perpendicularly to the upper surface of the base 1 is caulked and fixed by a rod-shaped core 8. , a yoke 5 whose hanging side follows the side surface of the electromagnetic coil 6 and is press-fitted and supported by both columnar built-up parts 101 and 102 of the base; a vertical side of the yoke 5 is bonded and fixed to the hanging side; L-shaped movable contact spring 1 in which the horizontal side on which the movable iron piece 13 is fixed faces the lower surface of the core 8
2, and the overlapping portion 2 of the movable contact terminal 2 is located on the hanging side of the yoke 5 at a position close to a fixed joint portion between the spring 12 and the yoke 5.
An electromagnetic relay characterized in that b is bonded and fixed to the yoke 5.