JPH073563Y2 - Electromagnetic relay - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of the Invention> The present invention relates to an electromagnetic relay in which a contact is opened and closed by a movable block that swings in a seesaw type around a central portion as a fulcrum.

<Prior Art and Problems> There are electromagnetic relays of this type shown in FIGS. 4 and 5. In the figure, this electromagnetic relay is roughly divided into an electromagnet block 1, a movable block 2 and a flat terminal base 3.

The electromagnet block 1 is composed of a coil spool 12 around which an electromagnetic coil 11 is wound, an U-shaped iron core 13, and a permanent magnet 14 provided upright in the center of the iron core 13. That is, the iron core 13 is inserted into the shaft portion of the coil spool 12 made of electrically insulating synthetic resin, and both end portions 13a, 13b in the longitudinal direction (left-right direction) of the iron spool 13 are provided at both end flange portions 12a, 12b of the coil spool 12.
Exposed from outside. The permanent magnets 14 are magnetized to have different polarities at the top and bottom, and a part 12c of the shaft center of the coil spool 12 is
It is fixed by insert molding.

Coil connecting pieces 15 are planted by insert molding on the flanges 12a, 12b of the coil spool 12 and are connected to the inner ends of the coil terminals 6 (6A, 6B) set on the terminal base 3. There is.

The movable block 2 has a protrusion 17 that forms a fulcrum on the lower surface of the central portion.
A plate-shaped movable iron piece 17 having c, a movable base 18 fixed to the central portion of the movable iron piece 17, and a conductive member fixed to the movable base 18 extending to both sides in the width direction (front-back direction) of the movable iron piece 17. Support springs 19, 19 and two sets of movable contact pieces 20 (20A, 20B) integrally formed on the support spring 19 while being fixed to the movable base 18 by extending in the longitudinal direction of the movable iron piece 17. It is configured.

The support springs 19 and 19 are connected and fixed to the inner ends 21a of the common terminals 21A and 21B provided on both sides of the terminal base 3 in the width direction. Reference numerals 22 (22A, 22B) and 23 (23A, 23B) are fixed terminals provided on both sides of the terminal base 3 in the width direction.
The movable contact pieces 20A, 20B come into contact with and separate from fixed contacts 24A, 24B fixed to the inner ends 22a, 23a of the fixed terminals 22, 23, respectively. 25 is a cover.

Next, the operation of the above configuration will be described.

Now, due to the magnetic flux of the permanent magnet 14, the right end portion 17 of the movable iron piece 17 is
It is assumed that b is attracted to the right magnetic pole portion 13b of the iron core 13.

In this state, when the electromagnetic coil 11 is excited to generate an exciting magnetic flux that cancels the magnetic flux of the permanent magnet 14, an attracting force is generated on the left magnetic pole portion 13a of the iron core 13, and the left end portion 17a of the movable iron piece 17 is attracted. As a result, the movable block 2 is pivotally displaced about the protrusion 17c in the direction of arrow a in FIG. 5 and is in the set state, and the movable contact piece 20A contacts the fixed contact 24A. Even if the excitation to the electromagnetic coil 11 is released, the left magnetic pole portion 13 of the iron core 13 is
The set state is maintained by the magnetic flux of the permanent magnet 14 passing through a.

In the above state, when the electromagnetic coil 11 is reversely excited, the magnetic flux of the permanent magnet 14 passing through the left magnetic pole portion 13a of the iron core 13 is canceled by the reverse excitation magnetic flux, and the right end portion 17a of the movable iron piece 17 becomes the right magnetic pole portion 13b of the iron core 13. 5, the movable block 2 is pivotally displaced in the direction of arrow b in FIG. 5 around the protrusion 17c to be in the reset state, and the movable contact piece 20B comes into contact with the fixed contact 24B.

By the way, in the above electromagnetic relay, as shown in FIG. 6a, a plurality of sets are made into one set, two sets of external terminal frame pieces 101, 102 facing each other, and a connecting piece 103 integrally connecting these frame pieces 101, 102. After the lead frame 104 having the above is molded from a conductive plate material (not shown), both the frame pieces 10
The flat terminal base 3 is formed by molding with synthetic resin so that the inner ends of the respective 1,102 are implanted, and then the outer ends of both frame pieces 101,102 are cut along the predetermined cutting lines La, La. Then, the common terminal is cut by cutting the lead frame 104 from the lead frame 104 as shown in FIG. 6b, and bending the frame pieces 101 and 102 along the side surfaces of the terminal base 3, respectively.
External terminals such as 21A and 21B are used (Fig. 6c).

However, in the so-called flat type in which the external terminals such as the common terminals 21A and 21B are bent along the side surface of the flat terminal base 3 and arranged in a claw shape, the electromagnetic relay is connected to the wiring board (Fig. Terminal base 3 when attached to (not shown)
Therefore, the mounting occupancy area becomes relatively large.

For this purpose, the external terminals 16A on one side in the width direction of the terminal base 3,
21A, 22A and 23A are projected to the side of the terminal base 3 as shown in FIG. 7 (only the common terminals 21A and 21B are shown as external terminals in FIG. 7), and the external terminals 16B, 21B, 22B, 23
If B is bent along the outer surface of the bottom wall of the terminal base 3 and extended to a position parallel to the external terminals 16A, 21A, 22A, 23B on one side, it becomes a so-called vertical type.
It becomes possible to reduce the installation occupied area. But,
If left as it is, the external terminals 16B, 21B, 22B, 23B on the other side may be expanded and deformed as shown by the chain line in FIG.
It will take time and effort to mount it on the wiring board.

<Purpose of the Invention> The present invention has been made in order to solve the problems of the above-mentioned conventional ones, and an object thereof is to provide an electromagnetic relay that can improve the mounting density and that has a good mounting workability.

<Structure and Effect of the Invention> In the electromagnetic relay according to the present invention, an electromagnet block is arranged on a terminal base having a row of a plurality of external terminals on both sides in the width direction, and the central portion is pivotally supported so as to be swingable. In a system in which the contacts are opened and closed by a movable block driven by a block, the rows of external terminals on one side project from the side surface of the terminal base to the side, and the rows of external terminals on the other side Each outer end is bent along the outer surface of the bottom wall of the terminal base, and is extended to a position parallel to the external terminal on one side, and the terminal base is attached to one side wall together with the electromagnet block and the movable block. Inside the bottom wall of the case, a plurality of grooves are housed in an open box-shaped case and guide and position the outer ends of the external terminals on the other side of the terminal base when the terminal base is housed. It is formed on the surface.

According to this invention, since the external terminal rows on both sides of the terminal base are projected to one side of the terminal base, it is a vertical type, which occupies a small installation area and has a groove for positioning the external terminal. Since the terminal base is housed in the holding case, the expansion deformation of the external terminal does not occur and the mountability is improved.

<Description of Embodiments> An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 are an exploded perspective view and a front sectional view showing an example of an electromagnetic relay according to the present invention, respectively, and the same parts as those of the conventional one shown in FIGS. 4 and 5 are designated by the same reference numerals. The description is omitted.

In the figure, a plurality of external terminals implanted on one side in the width direction of the terminal base 3, that is, a coil terminal 16A, a common terminal 21A,
The fixed terminals 22A and 23A are projected laterally from the side surface of the terminal base 3. The outer ends of the plurality of external terminals, that is, the coil terminals 16B, the common terminals 21B, and the fixed terminals 22B and 23B, which are planted on the other side in the width direction of the terminal base 3, are the outer surfaces of the bottom wall of the terminal base 3. And is extended along with the external terminals 16A, 21A, 22A, and 23A.

Reference numeral 26 is a box-shaped case made of synthetic resin whose one side wall is open, and the terminal base 3 accommodating the electromagnet block 1 and the movable block 2 is accommodated through the opening 26a. On the inner surface of the bottom wall of the case 26, a plurality of grooves 27 for guiding and positioning the external terminals 16B, 21B, 22B, 23B on the other side are formed.

Reference numeral 28 denotes a protective cover that opens and closes the upper opening of the terminal base 3 and can be omitted if the case 26 can sufficiently protect the movable block 1 and the like.

In the step of forming the terminal of the electromagnetic relay, as shown in FIG. 3a, two sets of external terminal frame pieces 101 and 102, one of which is formed long and faces each other, and a connecting piece integrally connecting the frame pieces 101 and 102. Leadframe 1 with 103
After molding 04 from a conductive plate material (not shown), the flat terminal base 3 is formed by molding with synthetic resin so that the inner ends of the frame pieces 101 and 102 are implanted. The ends of the pieces 101 and 102 are cut along predetermined cutting lines La and Lb to separate them from the lead frame. Further, while leaving the one frame piece 101 as it is, the outer end portion of the other frame piece 102 is bent along the outer surface of the bottom wall of the terminal base 3 and extended to a position parallel to the one frame piece 101. I am doing it.

The electromagnetic relay 1 is assembled by mounting the electromagnet block 1 and the movable block 2 on the terminal base 3 and housing the terminal base 3 in the case 26 with the protective cover 28 closing the upper opening of the terminal base 3.

In the above configuration, the basic operation of the electromagnetic relay, that is, the contact opening / closing operation by the movable block 2 is the same as the conventional one, and the description thereof is omitted here.

Here, the outer ends of the common terminal 21B and the fixed terminals 22B and 23B, which are external terminals on the other side of the terminal base 3, are bent along the outer surface of the bottom wall of the terminal base 3 and extended to one side surface side. Since it is taken out, it is configured as a so-called vertical type, and the mounting occupying area in a state where it is mounted on a wiring board (not shown) is small, and the mounting density can be increased.

In particular, since the terminal base 3 is housed in the case 26, the external terminals 16B, 21B, 22B, 23B fixed to the other side of the terminal base 3 at the time of housing are housed in the case 2 respectively.
Guided by groove 27 of 6 for easy insertion and second
Since it is positioned by the groove 27 as shown in the figure, there is no possibility that the external terminals 16B, 21B, 22B and 23B will be expanded and deformed.
It becomes easy to attach to a wiring board (not shown).

Further, in the above example, since the terminal base 3 is covered with the protective cover 28 and is housed in the case 26, the vibration resistance and the heat resistance are excellent, and the noise can be reduced.

In the terminal molding step, if the lead frame 104 shown in FIG. 3a is cut along the cutting lines La, La, a flat type mold can be obtained with the same molding die.

[Brief description of drawings]

1 and 2 are an exploded perspective view and a side sectional view showing an example of an electromagnetic relay according to the present invention, and FIGS. 3a and 3b are explanatory views of a terminal forming process in the electromagnetic relay, FIG. 4 and FIG. FIG. 5 is an exploded perspective view and a front sectional view showing the structure of a conventional electromagnetic relay, respectively, FIGS. 6a and 6b.
FIG. 6 and FIG. 6c are explanatory views of the terminal forming process of the conventional electromagnetic relay, and FIG. 7 is an explanatory view when the terminal structure of the same electromagnetic relay is changed. 1 ... Electromagnetic block, 2 ... Movable block, 3 ... Terminal base, 16A, 16B, 21A, 21B, 22A, 22B, 23A, 23B ... External terminal, 26
… Case, 27… grooves.

Claims (1)

[Scope of utility model registration request] 1. An electromagnetic system in which an electromagnet block is arranged on a terminal base having a plurality of rows of external terminals on both sides in the width direction, and a central portion is pivotally supported so that the electromagnet block opens and closes contacts. In the relay, the rows of external terminals on the one side project from the side surfaces of the terminal base, respectively, and the outer ends of the rows of external terminals on the other side extend along the outer surface of the bottom wall of the terminal base. Along with bending,
The terminal base is extended to a position parallel to the external terminal on one side, and the terminal base is housed together with the electromagnet block and the movable block in a box-shaped case with one side wall open. A plurality of grooves for guiding and positioning the outer ends of the external terminals on the side are formed on the inner surface of the bottom wall of the case.