JPH0119309Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to an electromagnetic relay.

[Conventional technology]

As for electromagnetic relays, the one shown in FIG. 12B has been proposed. That is, the armature 20 is disposed facing the free ends of a pair of yokes 10a, 10b around which the coil 7 is wound, and is moved (rotated) as shown by dotted lines when the coil 7 is energized.

At this time, the card 23 causes the movable spring 32 constituting the electrical switch to move as shown by the dotted line, and its free end is switched from the fixed contact 31 to the fixed contact 30. The fulcrum (terminal pin) 32a of this movable spring 32 is opposed to the fulcrum P side of the armature 20, and the free ends of the movable spring 32, that is, the fixed contacts 30 and 31 constituting the switch are connected to the armature 20.
It is configured to face the free end (movable end) side of 0.

[Problem that the invention attempts to solve]

As is clear from FIG. 12B, the armature 20
Since the movable end sides of the movable springs 32 and 32 face each other, a space corresponding to the sum of the respective moving distances is required, and the length (size) Lb of the armature 20 of the relay in the movable direction The problem is that this is relatively large.

[Means for solving problems]

In the present invention, the fulcrum of the movable spring 32 is arranged on the free end side of the armature 20, and the free end side of the movable spring 32 is arranged on the fulcrum side of the armature 20.

[Effect]

Since each free end, that is, a movable end of the armature 20 and the movable spring 32 corresponds to the fulcrum, that is, the fixed end of the other party, space can be used effectively.

〔Example〕

An example of the electromagnetic relay according to the present invention will be explained with reference to the drawings.

Referring to FIGS. 1, 2, and 6, 1 is a substrate made of an insulating material such as resin, and its four circumferences are surrounded by rising pieces 2 rising from these, and the substrate 1 is made of an insulating material such as resin. A relatively tall barrier 3 is provided on the substrate 1 to extend in the longitudinal direction of the substrate 1, and a notch 4 cut from the upper edge of the barrier 3 is provided approximately in the middle of the longitudinal direction of the barrier 3. is formed.
Note that this barrier 3 is located on the substrate 1.
The so-called input part 5 of the relay, which will be described later, is arranged in the wider area of the board 1 when viewed from the barrier 3, and the narrower area is A so-called output section 6 is arranged at.

First, the input section 5 will be explained. In FIG. 2, 7 is a coil wound on the bobbin 8.
Both ends of this coil 7 are electrically connected to terminal pins 9a and 9b attached to both ends of the bobbin 8. One end of each of a pair of yokes 10a and 10b is inserted into this bobbin 8 from both ends thereof, and are magnetically connected to each other within this bobbin 8, so that the yokes 10a and 10b The respective other ends extend along the axial direction of the bobbin 8 at the side portions of the coil 7, and these end surfaces are opposed to each other with an appropriate distance 1 between them.

The relay main body 11 in which the coil 7 and the yokes 10a and 10b are combined in this way is mounted on the substrate 1, but in this case, the extension direction of the axis of the bobbin 8 is aligned with the longitudinal direction of the barrier 3, and A pair of yokes 10a and 10b face the barrier 3,
and is installed at a distance from this. During this installation, the bobbin 8 is inserted into a small hole (not shown) previously formed at a predetermined position on the board 1.
The terminal pins 9a and 9b attached to the terminals are firmly inserted and attached. 12 is the main body 1 in this case
1, and is formed integrally with the substrate 1.

A magnetic pole piece 13 is attached to one end of the barrier 3 in the longitudinal direction, as shown in FIG. In this installation, one end of the lower part of the magnetic pole piece 13 is inserted into a wedge part (see FIG. 6) formed by a protrusion 14 provided on the board 1, and the other end is inserted into the wedge part 15 formed by the projection 14 provided on the board 1.
It is attached by being inserted into the gap between the protrusion 16 provided above and the base 3a of the barrier 3. These protrusions 14 and 16 are also formed integrally with the substrate 1.

The magnetic pole piece 13 mounted on the substrate 1 in this way and one yoke 10b of the main body 11 described above.
A magnet 17 is interposed between the two (see FIG. 4).
That is, this magnet 17 is arranged at a position perpendicular to each of the extension direction of the armature 20 and the movable direction of the armature 20. In this case, the direction of the magnetic field, that is, the direction of magnetization, is selected to be the direction from the yoke 10b toward the magnetic pole piece 13, or the opposite direction. Note that this magnet 17 is indicated by a dotted line in FIG.

At the other end in the longitudinal direction of the barrier 3, that is, at the end opposite to the installation position side of the above-mentioned magnetic pole piece 13,
As is clear from FIG. 6, on the surface of the barrier 3 facing the yoke 10a, a bearing portion 19 whose inner surface is formed into a semi-cylindrical surface 18 is formed integrally with the substrate 1 and the barrier 3.

A pair of yokes 10a, 10 of the main body 11 described above
The armature 20 is inserted into the gap formed between b and the barrier 3.

As is clear from FIGS. 2, 8, 9, and 10, this armature 20 includes a rectangular armature 21 made of a magnetic material, a cover 22 that covers one surface 21a of the armature, and In order to mechanically connect a movable spring (movable contact) to be described later, a card 23 protrudes outward from one surface 21a of the contact piece 21 and a surface of the contact piece 21 at one longitudinal end of the contact piece 21. The hinge shaft 25 is formed to extend along the longitudinal direction of the contact piece 21 and in a direction substantially perpendicular to the longitudinal direction of the contact piece 21. The card 23 is formed in the longitudinal center of the contact piece 21 so as to protrude outward from the above-mentioned surface 21a of the contact piece 21, and as is clear from FIG. A holding portion 24 is formed to sandwich the spring. The upper and lower surfaces 21c and 21d of the contact piece 21 are also covered by the above-mentioned cover 22, and the other surface 21b side of the contact piece 21 is located at an approximately intermediate position in the longitudinal direction of the contact piece 21, that is, the above-mentioned card 23 and A portion of the cover 22 is extended at a corresponding position to form a wrapping portion 26 around the contact piece 21. The cover 22, card 23, hinge shaft 25, and wrapping portion 26 are integrally formed in advance with an insulating material such as resin.

Furthermore, as is clear from FIG. 10, the hinge shaft 25 described above is formed into a semi-cylindrical shape as a whole, and when viewed from the contact piece 21, one surface 21a side thereof is a cylindrical surface 25a, and the other surface 21b side is a flat surface 25b. .

Hinge shaft 2 of armature 20 configured in this way
The cylindrical surface 25a of the yoke 5 is in contact with the semi-cylindrical surface 18 of the bearing part 19, and the flat surface 25b is in contact with the yoke 1.
This bearing portion 19 and the yoke 10a are in contact with each other.
By inserting the armature 20 between the barrier 3 and the pair of yokes 10a and 10b, the armature 20 is moved between the first state shown in FIG. 3 and the fourth state about the hinge shaft 25. It is designed to be able to rotate to other states shown in the figure.

The input section 5 is configured as described above.

In this case, the card 23 of the armature 20 is
It protrudes toward the output section 6 through the notch 4 of the barrier 3 . Note that the protrusion 27 shown in FIGS. 2, 6, etc. serves as a so-called pillow for the armature 20, and the armature 20 slides on this protrusion 27.

Next, the output section 6 will be explained. As is clear from FIGS. 2 to 5, this is because a pair of fixed contacts 30 and 31 are mounted on the substrate 1 facing each other with a predetermined interval, and these fixed contacts 30 and 31 are In this case, the movable spring 32
The fulcrum, or terminal pin 32a, is located on the opposite side of the armature 20, ie, the hinge shaft 25, with respect to the longitudinal direction of the barrier 3. Therefore, the pair of fixed contacts 30 and 31 are located on the fulcrum side of the armature 20. and the card 2 of the armature 20 mentioned above.
The holding portions 24 of No. 3 hold the movable spring 32 from above. The pair of fixed contacts 30, 31 and the movable spring 32 are fixed by inserting their terminal pins 30a, 31a, and 32a into small holes (not shown) formed in advance in the substrate 1. Of course, in addition to this, a support part that supports these contacts may be configured on the substrate 1, although not shown.

According to this configuration, when no current is supplied to the coil 7, that is, when the coil 7 is off, the free end side of the armature 20 comes into contact with the magnetic pole piece 13 as shown in FIG. 3 due to the magnetic field of the magnet 17. This is yoke 10a and 10
b are magnetically connected to each other, and the armature 2
Since the hinge shaft 25 side of 0 is almost magnetically connected to the yoke 10a, the free end of the armature 20 is
This is because it is attracted to the magnetic pole piece 13, which is the opposite pole of the magnet 17.

When current is supplied to the coil 7 in this state, the free end side of the armature 20 is attracted to the yoke 10b as shown in FIG. 4 due to the generated magnetic flux. That is, the armature 20 rotates around its hinge shaft 25. Of course, the strength of the magnetic field must be strong enough to overcome the attraction to the magnetic pole piece 13 described above. In this state,
The winding portion 26 of the armature 20 is a pair of yokes 10a.
and 10b are located within mutually opposing spacings.
When the current to the coil 7 is turned off, the coil magnetic flux disappears, and the armature 20 returns to the state shown in FIG. 3 due to the magnetic field of the magnet 17.

As the armature 20 is rotated as shown in FIGS. 3 and 4, the movable spring 32 is driven via the card 23, and this is switched into contact with the fixed contact 30 or 31. That is, the output section 6 performs electrical switching of the switch.

In the above description, the free end of the armature 20 is connected to the yoke 10 when current is supplied to the coil 7 (turned on).
When it is attracted to b and shuts off (off), the magnetic pole piece 13
Although the case has been described in which it is configured to be monostable, that is, it is configured to be adsorbed to , it can also be configured to be bistable.

That is, as shown in FIG. 11, the yoke 10b is configured in an L-shape, with a pair of magnetic pole pieces 13a and 13b facing each other at the end thereof, and a magnet 17 interposed between the pair of magnetic pole pieces 13a and 13b. This is the case. In this case, by changing the direction of the current supplied to the coil 7 and energizing it, the free end of the armature 20 is attracted to the magnetic pole piece 13a or 13b, and the attracted state is continued even after the current is turned off. can be done.

Incidentally, the magnet 17 can be long in the direction of extension of the bobbin 8, and in that case, it is possible to use a magnet with a relatively weak magnetizing force, that is, an inexpensive one. However, the length of the magnet 17 or the shape of the yoke 10a must be selected so as not to magnetically short-circuit the pair of yokes 10a and 10b.

In the above-described configuration, the input section 5 and the output section 6 are completely electrically isolated by the barrier 3 and the cover 22 of the armature 20, and the electrical influence of the input section 5 is obtained on the output section 6. Never.

Further, the contacts constituting the relay body 11 and the output section 6 can be attached to the board 1 by simply inserting their terminal pins into small holes previously formed in the board 1, and the armature 20 can also be attached to its hinge shaft 25. The bearing part 19
and the yoke 10a, the relay body can be easily manufactured.

[Effect of idea]

According to the present invention described above, since the free end side of the movable spring 32 faces the fulcrum side of the armature 20, the space on the fixed side of the armature 20 can be effectively utilized when viewed from the movable spring 32. Therefore, even if the armature 20 and the movable spring 32 move (rotate) by the same amount as in the conventional case shown in FIG. 12B, according to the present invention, as shown in FIG. 12A, , the length La of the relay is Lb in the case of Fig. 12B
It has the feature that it can be made smaller by 1 compared to , and thus the entire relay can be made smaller by that much.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an example of the electromagnetic relay according to the present invention with the lid removed, Fig. 2 is an exploded perspective view of the electromagnetic relay, Fig. 3 is a plan view of Fig. 1, and Fig. 4 shows its operation. 5 is a plan view of the state in which the armature is removed from FIG. 3, FIG. 6 is a perspective view of only the board, and FIG. 7 is a perspective view of the state in which the magnetic pole pieces are attached to the board. FIG. 8 is a perspective view of the armature, FIG. 9 is a central sectional view thereof, FIG. 10 is a bottom view thereof, FIG. 11 is a plan view showing a magnetic circuit of another embodiment, and FIG. 12 is a conventional relay. FIG. 3 is a schematic plan view comparing the sizes of the relay according to the present invention and the relay according to the present invention. 1 is the board, 3 is the barrier, 11 is the relay body, 1
0a and 10b are first and second yokes, 19 is a bearing part, 20 is an armature, 30 and 31 are fixed contacts,
32 is a movable spring.

Claims (1)

[Claims for Utility Model Registration] An armature is arranged so as to extend along the axis of a bobbin on which a coil is wound, and the armature extends on the opposite side of the armature from the coil. In an electromagnetic relay configured to drive a movable spring arranged in line with the armature, the fulcrum of the movable spring is arranged on the free end side of the armature, and corresponds to the free end side of the movable spring. fixed contacts,
An electromagnetic relay placed on the fulcrum side of the armature mentioned above.