JPH058540B2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial field The present invention is an electromagnetic relay, in particular, a movable block having movable iron pieces arranged on both sides of an electromagnet fixed to a fixed block, which is connected in the moving direction by two leaf springs. This invention relates to an electromagnetic relay that is installed so that it can be reciprocated while being held in place by an electromagnetic relay, and that opens and closes a contact mechanism by moving a movable block in parallel based on the excitation and demagnetization of an electromagnet.

(B) Prior art and its problems Conventionally, in this type of electromagnetic relay, for example, a guide part was provided on the inner surface of the base constituting the fixed block, and the movable block was guided by this guide part and moved in parallel. .

However, in the conventional example, since it is unavoidable in manufacturing that a slight gap be created between the guide portion and the movable block, the movable block wobbles and moves back and forth in an inclined state. For this reason,
In the conventional example, there is a time lag in the contact/separation operation of the contacts, which deteriorates the operating characteristics of the electromagnetic relay, and as the movable block moves, the spring force applied to both ends of the leaf spring becomes unbalanced, resulting in uneven contact pressure. It had the disadvantage of becoming.

(c) Object of the Invention The object of the present invention was made in view of the above-mentioned drawbacks, and the movable block reciprocates in a parallel state, there is no time lag in the contact/separation operation of the contacts, and the operating characteristics are good. An object of the present invention is to provide an electromagnetic relay with uniform contact pressure.

(d) Structure and Effects of the Invention In order to achieve the above object, the electromagnetic relay according to the present invention has a fixing point formed by fixing the center portions of two leaf springs to a fixing block, and One end of the leaf spring on the same side is fixedly supported or rotatably supported on a movable block to form a parallelogram, while the other ends of the two leaf springs are also movable to the movable block. The configuration is supported by

Therefore, the electromagnetic relay according to the present invention has two
A parallelogram is formed by a fixed point formed by fixing the center portions of the two leaf springs to a fixed block and a support point formed by fixedly supporting one end of the two leaf springs in the same direction to a movable block. Since it is installed like this,
The movable block does not tilt, but reciprocates while maintaining a parallel state to the fixed block, and has the effect that the contact points can be brought into contact and separated at the same time.

Moreover, since the movable block can reciprocate while maintaining a parallel state, the spring force applied to both ends of the leaf spring will not be unbalanced.
This has the effect of making the contact pressure uniform.

(E) Description of Embodiments The embodiment shown in FIGS. 1 to 4 is an electromagnetic relay according to the present invention configured as a high-frequency relay, and roughly consists of a fixed block 1, an electromagnet part 10, and a movable block 20. , two reciprocating leaf springs 30 and 35, and a case 40.

The fixed block 1 is provided with contact terminals 9a, 9b, 9c via a ground plate 5 on the back surface of a base 2, which has rectangular long holes 3, 3 integrally molded with appropriate resin, and connecting portions 8a, 8b. , the terminal block 8 is press-fitted and fixed.

Contact part (tip) of each fixed terminal 9a, 9b, 9c
9a', 9b', 9c' and 9a'', 9b'', 9c'' are located in the elongated holes 3, 3, and the inner walls of the elongated holes 3, 3 have contact portions 9a', 9b', 9c' and 9a. Ground contacts 2a', 2b', ..., 2f' and 2
a″, 2b″, ..., 2f″ are installed as appropriate.

In addition, the ground 5 is made of a copper plate, and the connecting portions 5a,
5b, . . . , 5f are cut and raised, and ground contacts 6a, 6b, . . . , 6f are cut and raised on the back side thereof. The base 2 has fixing parts 7, 7 having fixing grooves 7a, 7b erected at the center of the upper end of the longitudinal side walls, and the entire surface thereof is plated with a conductive thin film.

Therefore, when the terminal block 8 is press-fitted and fixed into the elongated holes 3, 3 through the connection parts 5a, ..., 5f of the ground plate 5, the base 2 is connected to the base 2 through the conductive thin film of the base 2.
Since the ground plate 5 and the ground plate 5 are electrically connected and the connection area is increased, high frequency characteristics are improved. Note that, of course, the conductive thin film and the fixed terminals 9a, 9b, and 9c are insulated.

The electromagnet section 10 inserts the I-shaped iron core 11 into the body of the spool 12, winds the coil 17, and
It is a combination of a spool 12 and a yoke 19, and is mounted in the recess 4 of the base 2. The spool 12 is attached to the yoke 19 in the hole 13a of the base 13.
By protruding the protruding piece 19a, the yoke 1
It is combined with 9. In addition, the coil terminals 18, 1
8 is attached to the through holes 13b, 13b of the platform 13, and protrudes below the base 2.

The movable block 20 includes movable iron pieces 26a, 22, 22, and 22 frames of a movable stand 21 integrally molded with appropriate resin.
26b and the permanent magnets 27, 27 sandwiched therebetween are fixed, and the movable contact pieces 29a, 29b, 21c, 2
Insulating stands 28a, 28b, 28c, 2 with 9d
8d are inserted and fixed into holes 23a, 23b, 23c, and 23d.

Support portions 24 and 25 are provided at the corners of the frame portions 22 and 22 to protrude perpendicularly to the longitudinal direction. These support portions 24 and 25 have support grooves 24 and 25 for supporting leaf springs 30 and 35, which will be described later.
a, 24b, and support grooves 25a, 25b are formed to face each other.

Furthermore, this movable base 21 has a movable iron piece 26a,
26b is installed so as to face both protruding ends of the iron core 11 protruding from the spool 12 with a certain gap, and is movable back and forth in parallel in the directions of arrows A and B by leaf springs 30 and 35. It is held in place by a clamp.

Note that 21a and 21b fit into the guide protrusions 14a and 14b of the electromagnet section 10 described above, and the movable base 21
This is a guide hole that guides the

The leaf springs 30 and 35 have their center portions 31 and 36 pressed into the fixing grooves 7a and 7b of the fixing portion 7 or fixed with an adhesive or the like to serve as fixing points, while the end portions 32
a, 32b and the ends 37a, 37b to the support part 2
4, 25 support grooves 24a, 24b and support groove 2
5a and 25b. One end portion on the same direction side, for example, the end portions 32a and 37a, is rotatably supported or fixedly supported in the support grooves 24a and 25a of the support portions 24 and 25 so that the fulcrum does not shift, and is used as a support point.

Note that the end portions 32b and 37b are movably supported, and as shown in FIG.
0 and 35 are attached to the fixed block 1 and the movable block 20 so that the support points 32a and 37a and the fixed points 31 and 36 form a parallelogram.

Next, the operation of the electromagnetic relay according to this embodiment will be explained.

Now, when the coil 17 is not energized, the movable block 20 is pressed by the leaf springs 30 and 35,
Both end magnetic pole surfaces of the iron core 11 and movable iron pieces 26b, 26b
A suction force is applied between the movable block 20 and the movable block 20 to move in the direction of arrow A. Therefore, both ends of the movable contact piece 29a contact the ground contacts 2d' and 2f',
Both ends of the movable contact piece 21b are in contact with the contact portions 9a' and 9b'.

Further, both ends of the other movable contact piece 29c are connected to the contact portion 9.
b'', 9c'', and both ends of the movable contact piece 29d are in contact with ground contacts 2b'', 2d''.

Here, when the coil 17 is excited, an attractive force acts between the magnetic pole surfaces at both ends of the iron core 11 and the movable iron pieces 26a, 26a, the movable block 20 moves in the direction of arrow B, and both ends of the movable contact piece 29b are grounded. Contact 2
a', 2c', and both ends of the movable contact piece 29a contact the contact portions 9b', 9c'.

In addition, the other movable contact piece 29c is the ground contact 2
c″, 2e″, the movable contact piece 29d contacts the contact portion 9
Contact a″, 9b″.

That is, in this embodiment, the movable block 20 moves in the direction of arrow B based on the excitation/demagnetization of the coil 17.
direction, returns to the direction of arrow A, and contacts 9a',
9b', 9b', and 9c' are switched, and the contact portions 9a'', 9b'' and 9b'', 9c'' are switched.

At this time, as shown in FIG.
If the center parts 31 and 36 of 35 are fixed points, and the one ends 32a and 37a are used as support points, when the movable block 20 moves, the support points 3
2a, fixed point 31, support point 37a and fixed point 3
Since the movable blocks 6 are always in a relationship that approximately constitutes a parallelogram, the movable block 20 performs the approach and separation operations while maintaining the parallel state. As a result, there is no time lag in the contact/separation operations, improving the operating characteristics of the electromagnetic relay and making the contact pressure uniform.

Furthermore, in this embodiment, the other ends 32b and 37b of the leaf springs 30 and 35 are movably supported, so that
As the movable block 20 moves back and forth, the leaf spring 3
One end portion 32a, 37a of 0,35 is fixed point 31,
Draw an arc centered on 36. Therefore, the movable block 20 moves slightly in the left-right direction in FIG. 4 while maintaining its parallel state. Therefore, the movable contact piece 29
a, 29b, 21c, 29d are contact parts 9a', 9
It has the advantage of performing a wiping action on b', 9c' and 9a'', 9b'', 9c''.

Note that the support means for one end of the leaf spring is a fixed support,
Alternatively, as described above, it may be a rotational support in which the fulcrum does not shift.

[Brief explanation of the drawing]

The drawings show an embodiment of the electromagnetic relay according to the present invention, in which Fig. 1 is an exploded perspective view, Fig. 2 is a perspective view of a movable base, Fig. 3 is a perspective view of the base, and Fig. 4 is a plan view. . 1... Fixed block, 10... Electromagnet part, 20
... Movable block, 26a, 26b... Movable iron piece, 30, 35... Leaf spring, 31, 36... Fixed point, 32a, 37a... Support point.

Claims (1)

[Claims] 1. A movable block with movable iron pieces arranged on both sides of an electromagnet portion fixed to a fixed block is installed so as to be movable back and forth by being held in the moving direction by two leaf springs, and the electromagnet In an electromagnetic relay that opens and closes a contact mechanism by moving a movable block based on excitation and demagnetization of the parts, a fixed point is formed by fixing the central parts of the two leaf springs to a fixed block, and One end of the spring on the same side is fixedly supported on a movable block to form a parallelogram, while the other end of the two leaf springs is movably supported on the movable block. Features of electromagnetic relay. 2. The electromagnetic relay according to claim 1, wherein the fixed support means for fixing one end of the leaf spring to the movable block is a rotational support that does not shift the fulcrum.