JPS6346941B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a polarized reed relay.

Conventionally, in this type of reed relay, as shown in FIGS. 7 and 8, a glass tube reed switch 6' having a coil 2' wound therein is housed in a casing 1', and the lead piece of the glass tube reed switch 6' is housed in a casing 1'. Output terminals 19' and 19'' of 18' and 18'' are fixed to contact terminals 15' and 16', respectively, and a permanent magnet 17' is attached to one of the outgoing terminals 19'. Therefore, when the coil 2' is energized, the reed pieces 18', 1 of the reed switch 6'
8'' is operated to open and close.

However, in this case, although the magnetic flux of the permanent magnet 17' flows as shown by the arrow A, the gap between the permanent magnet 17' and the lead terminal 19'' of the lead piece 18'' that does not make contact with the permanent magnet 17' is large, so the opening/closing operation is performed. was not carried out smoothly. Furthermore, if another magnetic body approaches this magnetic circuit, there is a risk that magnetic flux will leak to the magnetic body, reducing the flow of magnetic flux in the gap between the lead pieces 18' and 18'' and reducing sensitivity. It was not possible to arrange relays in a high density.

Furthermore, when a pair of glass tube reed switches 6' and 6' are used, when the coil 2' is energized, the magnetic flux is concentrated in the gap between the parallel reed pieces 18' and 18'', which has smaller magnetic resistance. There was a fear that even if one reed switch 6' was activated, the other reed switch 6' would become inoperable.

SUMMARY OF THE INVENTION An object of the present invention is to provide a polarized reed relay that can eliminate the above-mentioned drawbacks, prevent magnetic leakage, and improve sensitivity.

The reed relay of the present invention will be explained below with reference to the drawings.

In FIGS. 1 to 5, reference numeral 1 denotes a base, and a hollow coil frame 3 around which a coil 2 is wound is placed on one side. Further, an iron core 4 is held through the coil frame 3, and both ends of the iron core 4 protrude from flange parts 5, 5 at both ends of the coil frame 3. Furthermore, in the vicinity of each end of the other side of the base 1, there are first guide projections 6, 7 extending horizontally from the flange parts 5, 5 away from each other and toward both ends of the other side of the base 1. , second magnetic pole plates 8 and 9 are arranged in pairs, respectively. The first and second magnetic pole plates 8, 9 of each set described above
is bent downward and upward into an L shape,
fixed contact parts 11 facing each other with a contact gap 10 in between;
12 and extends horizontally inward beyond the flange portions 5, 5 of the coil frame 3.
It is equipped with 4. In this case, the magnet facing portions 13 and 14 of the first and second magnetic pole plates 8 and 9 of each set are located above and below the center of the other side of the base 1, that is, the center of one side of the coil 2 wound around the coil frame 3. They separate from each other and face each other. In addition, each of the first and second magnetic pole plates 8 and 9 has terminal portions 15 and 1 that are bent downward and pass through the base 1.
6 has been extended.

Reference numeral 17 denotes a permanent magnet that has two sets of magnetic poles and is provided so that different poles are adjacent to each other, and the magnetic poles of each set are connected to the magnet facing portions 13 and 1 of the first and second magnetic pole plates 8 and 9 of each set, respectively.
4, and the first of both sets.
It is placed on the magnet facing parts 13, 13 of the magnetic pole plates 8, 8 and is spaced apart from the magnet facing parts 14, 14 of the second magnetic pole plates 9, 9. The permanent magnet is divided into two pieces, and the magnet facing portions 13 and 1 of the first and second magnetic pole plates 8 and 9 of each set are divided into two pieces.
4 may be matched respectively. 18, 18 are movable contacts, one end of which extends into the contact gap 10, 10 defined between the fixed contact portions 11, 12 of the first and second magnetic pole plates 8, 9 of each pair, and the other end of which extends to the iron core. 4 and extends toward one side of the base 1 below or beyond each end of the base 1. Further, one end portion of a contact fixing piece 19 having a spring property is integrally fixed to the lower surface of each of the movable contacts 18.
The other end of the movable contact 9 extends parallel to the movable contact 18 via an inclined portion adjacent to the movable contact 18, and is embedded in a lower guide protrusion 6 protruding from the flange portions 5, 5. Further, the contact fixing piece 19 is provided with a common terminal portion 20 extending from the guide protrusion 6, bent downward, and passing through the base 1. Further, the movable contact 18 may be formed by forming one end of a copper material, for example, and the other end of a steel material, for example, by combining these different materials. Reference numeral 21 denotes a coil terminal, and the drawn end of the coil 2 can be wound and fixed to a coil winding part 22 that projects upward from the base 1. 23 is a cover attached to the base 1.

Further, the operation of the present invention will be explained in detail. Now coil frame 3
When the coil 2 is excited, the iron core 4 is magnetized, and the other end of each movable contactor 18 is attracted to each end of the iron core 4. At the same time, one end of each movable contact 18 moves upward and separates from the fixed contact portion 11 of each first magnetic pole plate 8 within each contact gap 10, and each second magnetic pole plate 9
The fixed contact portion 12 of In this case, the permanent magnet 17 is in contact with the magnet facing portion 13 of each first magnetic pole plate 8, but is spaced apart from the magnetic pole facing portion 14 of each second magnetic pole plate 9, so that when the coil 2 is de-energized, Each movable contact 18 is connected to the fixed contact portion 11 of the first magnetic pole plate 8.
At the same time, the spring force of the contactor fixing piece 19 is also biased to return to its original position and be attracted.

On the other hand, when the coil 2 is excited, the magnetic flux of the coil 2 flows to the iron core 4, the movable contact 18, the second magnetic pole plate 9, the contact gap 10, the movable contact 18, and the iron core 4, and the magnetic flux of the permanent magnet 17 flows to the permanent magnet 17. , second magnetic pole plate 9,
Movable contactor 18, contact gap 10, first magnetic pole plate 9,
The current flows to the permanent magnet 17. Therefore, since the members constituting the magnetic circuit are in contact with each other or are closely adjacent to each other, the magnetic circuit can be formed without a large gap, that is, magnetic resistance, and other magnetic bodies can come close to each other. There is virtually no magnetic leakage. Also 2
A set of first and second magnetic pole plates 8, 9 and a movable contactor 1
Since it is provided with a contact opening/closing part consisting of 8, and both contact opening/closing parts are operated through the same iron core 4, the two contact gaps 10, 10 are arranged in series with respect to the magnetic flux of the coil 2 as a whole. A magnetic circuit will be constructed. However, one set of movable contacts 1
8 operates and the magnetic resistance of the contact gap 10 changes, the magnetic resistance changes immediately in the contact gap 10 of the other set, and both movable contacts 1
8 and 18 substantially always begin operation at the same time.

In addition, according to the present invention, as shown in FIG. 6, the coil 2 is excited and the movable contact 18 moves from the fixed contact portion 11 of the first magnetic pole plate 8 toward the fixed contact portion 12 of the second magnetic pole plate 9. When moving upward, the movable contact 18 receives an attractive force acting between the iron core 4 and the movable contact 18 as shown by curve A, and an attractive force acting in the contact gap 10 as shown by curve B. The suction force shown by the synthesized curve C is added, and a larger suction force is provided compared to conventional products. In FIG. 6, the straight line D represents the spring force of the contact fixing piece 19 that holds the movable contact 18, and the curve E represents the spring force between the iron core 4 and the movable contact 1 when the coil 2 is not energized.
8, the curve F is the attraction force that acts in the contact gap 10 when not energized, and the curve G is the combined attraction force when not energized.

According to the polarized reed relay of the present invention configured as described above, a magnetic circuit can be configured without having a large magnetic resistance, and the magnetic flux in the coil and permanent magnet flows through the contact gap, so that Opening/closing operation can be guaranteed b. There is no magnetic leakage even if other magnetic materials are placed close to each other, so many reed relays of the same type can be arranged, allowing for high-density mounting. c. High attractive force allows high contact points. It is possible to achieve remarkable effects such as the ability to obtain high voltage, to be operable even with small current excitation, and to improve reliability.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a part of the polarized reed relay of the present invention cut away, FIG. 2 is a horizontal cross-sectional view of the same half body cut at different positions, and FIG.
The same vertical cross-sectional view taken along the line, Figure 4 is the second
A vertical sectional view taken along the line - in the figure, Figure 5 is a longitudinal sectional view taken along the - line in Figure 2,
FIG. 6 is an explanatory view of the same operation, FIG. 7 is a longitudinal sectional view of the conventional example, and FIG. 8 is a horizontal sectional view of the same. 1...base, 2...coil, 3...coil frame, 4...
Iron core, 5...flange part, 6, 7...guide protrusion, 8
...First magnetic pole plate, 9... Second magnetic pole plate, 11, 12... Fixed contact part, 13, 14... Magnet facing part, 15, 16
...Terminal part, 17...Permanent magnet, 18...Movable contactor,
19...Contactor fixing piece, 20...Common terminal part, 21...
Coil terminal, 22...Coil winding part, 23...Cover.

Claims (1)

[Claims] 1 A base 1, a coil frame 3 around which a coil 2 is wound and placed on one side of the base 1 in a direction perpendicular to the axis, and an iron core 4 inserted into the coil frame 3.
and a movable contact 18 which is provided at both ends of the iron core 4, and whose one end side is slightly spaced apart from the end of the iron core 4 and is disposed so as to be able to come into contact with and be separated from the end of the iron core 4.
A contact gap 1 is provided for each of the two movable contacts 18 and is disposed on the other side of the base 1 to position the other end side of the movable contact 18.
The first and second magnetic pole plates 8 and 9 are opposed to each other through the
and a permanent magnet 17 disposed between the first and second magnetic pole plates 8 and 9.