JPS60934B2 - polar electromagnet device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a polarized electromagnet device.

Conventionally, as a polar electromagnet device, for example, Fig. 1, Fig. 2
As shown in the figure, two types are available: a single stable type and a latching type. In the single stable type (see FIG. 1), one end of the two yokes 70 and 71 facing each other is used as a magnetic pole surface, and a movable iron core 72 is placed between these ends.
At the same time, the permanent magnet 73 and the base of the movable iron core 72 are sandwiched between the other ends of the yokes 70 and 71, and the magnetic flux of the permanent magnet 73 is By applying an exciting current in the opposite direction, the movable iron 072 is moved downward in the figure, and when the energization to the coil 74 is stopped, the movable iron core 72 moves to the permanent magnet 73.
It is designed so that it returns upwards. on the other hand,
The latching type (see Figure 2) has yokes 80, 8
A coil 8 is wound around the outer periphery of the movable iron 084 with two permanent magnets 82 and 83 and the base of the movable iron 084 sandwiched between them.
Even if the movable iron 084 is reversed downward in the figure by applying a current that is excited in the opposite direction to the magnetic flux of the permanent magnet 82 that attracts the movable iron D84 to the coil 85, and the energization to the coil 85 is stopped. The movable iron core 84 is only turned upward in the figure by maintaining this state and passing a current in the opposite direction.

By the way, the temperature dependence of the magnetomotive force of an electromagnet is generally about 100
．． 4%/00, and the temperature dependence of the magnetic flux of the permanent magnet (ferrite type) is approximately 10.19%°C.

Therefore, in a latching type with two permanent magnets, the temperature dependence of both the magnetomotive force of the electromagnet and the magnetic flux of the permanent magnet cancel each other out, so the operating voltage hardly changes even if the temperature changes. However, in the case of the single stable type, the magnetomotive force of the electromagnet has a large temperature dependence, and fluctuations in the operating voltage due to temperature changes are unavoidable.

The present invention has been made in view of the above-mentioned drawbacks, and an object of the present invention is to provide a polar electromagnet device with good temperature characteristics by converting it into a single stable type by utilizing the characteristics of the latching type.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings, which are exemplary embodiments.

3 and 4 show a polarized electromagnetic relay in which the polarized electromagnet device according to the present invention is applied.

Reference numeral 1 denotes a first spool integrally molded from synthetic resin, which has a 1'2 cedar-shaped body part 2, collar parts 3a, 3b, and auxiliary winding parts 5a, 5b in the center, and has the above-mentioned winding parts at both ends. Self-auxiliary winding part 5a
, 5b.

Terminals 1 are provided on the walls 6a and 6b so as to protrude from both sides.
1, 12, 13, and 14 are insert molded. 1
6 is a lead piece (movable iron core) made of an elastic metal plate that is conductive and magnetic; 19 is a lead piece 1 made of a magnetic material;
This is an auxiliary plate that has approximately the same shape as the base 17 of No. 6, and both of them are similar to the base 17 of
, 19a are spot welded and integrated.

The lead piece 16 and the auxiliary plate 19 are inserted from above into the groove 4 provided in the eye 2 of the first spool, and their bases 17 and 19a are connected to the wall 6a of the first spool and the auxiliary winding. 5a, and the protruding piece 18 at the lower end of the lead piece 16 is connected to the insert terminal 11 by spot welding. 20 is a second spool in a 1'a formation which is vertically combined with the 8 parts of the first spool, the collar part and the auxiliary winding part, and the body part 21 has a groove part 22. Auxiliary winding portions 26a, 26b are provided on the outer surfaces of the flanges 23a, 23b, and recesses 24a, 24b, an introduction portion 25a, and a lead-out portion 25b are provided on the upper surfaces of the flanges 23a, 23b.

The second spool 2 is placed on the first spool 1 with the lead piece 16 in between, and a coil 28 is wound around the body parts 2 and 21. At this time, the winding beginning portion 29a of the coil 28 is
First, it is connected to the terminal 13, and after being wound several times in the auxiliary winding parts 5a and 26a, it is wound around the body parts 2 and 21 via the introduction part 25a, and the winding end part 29b of the coil 28 is
After being wound several times in the auxiliary winding portions 5b and 26b, it is connected to the terminal 14. 31 and 32 are ferrite-based permanent magnets having electrical insulation properties, and these permanent magnets are connected to the wall portion 6a and the auxiliary winding portion 5a so as to support the base 17 of the lead piece 16 and the base 19a of the auxiliary plate 19. , 26a.

Press in the S pole in the same direction. 37a and 37b are electrically conductive and magnetic yokes whose tips 38a and 38b are attached with contact material such as silver, and are connected to the walls 6a and 6 of the first spool 1.
b, its lower surface abuts the step portions 7a, 7b of the wall portions 6a, 6b, and the inner surface of the one end portion contacts the permanent magnet 31.
, 32, and the other end tips 38a, 38b.
The tips 16a of the overlapping blade pieces 16 are opposed to each other to form a magnetic pole surface.

Note that the protrusion 39b on the lower surface of the yoke 37b is connected to the member 12 by spot welding. Reference numeral 47 denotes a shield plate bent into a substantially U-shape, which is fitted from the side into the recess 8 on the outer surface of the wall 6a of the first spool 1, and is inserted between the lower surface of the collar 3a of the first spool and the second spool. The recesses 24a and 24b on the upper surface of the collar portions 23a and 23b of 20 are sandwiched from above and below.

The drive unit main body assembled as described above is mounted on a board frame 50 that has been punched out into a predetermined shape, and the terminals 11, 12 and wings 3, 14 inserted into the first spool 1 are connected to the lead terminals 51, 54, 55, respectively. , 56, yoke 37
The protrusion 39a on the lower surface of a is connected to the lead terminal 53, and the protrusion 48 of the shield plate 47 is connected to the lead terminal 52 by spot welding.

In this state, as shown by the dotted chain line in FIG. 3, the main body of the drive section is molded at low pressure using epoxy resin to completely seal the main body and form the outer shape portion 59.

After the low-pressure molding, the frame portion 57 of the lead frame 50 is cut to separate the lead terminals 51 to 56, and each lead terminal is bent to form a desired polarized electromagnetic fiber.

The polarized electromagnetic relay having the above structure is of a single stable type, and under normal conditions, the tip 16a of the reed piece 16 is moved to the yoke by the deflection force of the auxiliary plate 19 and the magnetic flux of the permanent magnet 32.
7b is in contact with the tip 38b of lead terminal 51 and 5.
4 are conductive, and the lead piece 16, the yoke 37b, and the permanent magnet 32 constitute a magnetic circuit.

Now, when an exciting current is applied to the coil 28 in the direction opposite to the magnetic flux of the permanent magnet 32, the tip 16a of the reed piece 16 repels the tip 38b of the yoke 37b, and the permanent magnet 3
1 is attracted to the tip 38a of the yoke 37a, and the tip 16a of the reed piece 16 is attracted to the tip 38a of the yoke 37a.
8a, the lead terminals 51 and 53 are electrically connected, and the lead piece 16, the iron 37a, and the permanent magnet 31 constitute a magnetic circuit. Next, when the power supply to the coil 28 is stopped, the tip 16a of the lead piece 16 is attached to the permanent magnet 31.
Although the lead piece 16 tries to be held while being attracted to the tip 38a of the yoke 37a due to the magnetic flux, the force of returning the lead piece 16 to the right in FIG. , the lead piece 16 returns to the right in FIG. 3 due to its own springiness, and the tip 16a of the lead piece 16 comes into contact with the tip 38b of the yoke 37b. In this way, the lead piece 16 is displaced in the left-right direction in FIG. 3 as the coil 28 is excited and demagnetized to open and close the contact, thereby performing a single stipple type operation. In the above polarized electromagnetic relay, the auxiliary plate 19 may be made of a non-magnetic material, but a magnetic material increases the supermagnetic force of the electromagnet and is preferable in terms of magnetic properties.

Further, the auxiliary plate 19 may be made of a spring material like the reed piece 16.
The deflection force may be appropriately set in consideration of the distance between the tips of the tips a and 37b. Note that the method for attaching the auxiliary plate 19 to the lead piece 16 may be spot welding or full-surface adhesion. Furthermore, in the above embodiment, the tips 3 of the yokes 37a and 37b
Although 8a and 38b are configured to have two functions as a magnetic pole surface and a fixed contact, the present invention is not limited to this. For example, a card that is movable by engaging with the lead piece 16 may be provided, and the The contact piece may be operated to open and close the contact.

As is clear from the above explanation, according to the present invention, since two permanent magnets are provided and the structure is similar to the latching type, "the mutual temperature dependence of the electromagnet and the permanent magnet cancels out,"
A single stable type polar electromagnet device with stable temperature characteristics can be obtained.

[Brief explanation of the drawing]

1 and 2 are principle explanatory diagrams of conventional single stable type and latching type polarized electromagnet devices, and FIG. 3 is a partial cross-sectional plan view of a polarized electromagnetic relay to which the polarized electromagnet device according to the present invention is applied. 4 are exploded perspective views of essential parts. 1...First spool, 2...Body part, 3a,
3b...'flange, 4...groove, 6a, 6
b... Wall part, 11, 12, 13, 14...
...Insert terminal, 16...Lead piece (movable core), 17...Base, 19... Auxiliary plate, 20...Second spool, 21...
Body part, 22...Groove part, 23a, 23b...
Flange part, 28... Coil, 31, 32... Permanent magnet,
37a, 37b... Yoke, 38a, 38b...
...Tip, 50...Lead frame, 51-56...Lead terminal, 59...Outline part. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. The base of an elastic movable iron core is clamped between two permanent magnets with N and S poles facing the same direction, and the outer surface of the permanent magnets is held at one end of two yokes. At the same time, the other end of the yoke is set as a magnetic pole face with the movable iron core facing in between, and the movable iron core approaches and separates the above magnetic pole faces by exciting a coil wound around the outer periphery of the movable iron core. A polar electromagnet device as described above, characterized in that an auxiliary plate, which is shorter than the movable core and which deflects the movable core in the direction of one magnetic pole surface, is attached to the base of the movable core. 2. The polar electromagnet device according to claim 1, wherein the auxiliary plate is made of a magnetic material.