JPH01316907A - Monostable type polarized electromagnet - Google Patents

Abstract

PURPOSE:To make a attraction force large both at an operation starting time and around an end of the operation by a method wherein a center iron core or one of ends of a yoke is made to extend to the side of a magnetic pole piece, and a second magnetic pole piece is so formed as to extend to a side opposite to the outside of the yoke. CONSTITUTION:A center iron core 2 of a core 1 nearly E-shaped is wound with a coil 3, and two spaces 6 and 7 are formed at one end of the coil 3 with yokes 4 and 5 and the iron core 2. Magnetic pole pieces 10 and 11 of a movable block 8 are positioned at the spaces 6 and 7 respectively to form main spaces g1, g2, g3, and g4. The end of the yoke 4 is made to extend and approach the magnetic pole piece 10 side at the space g1, the second magnetic pole piece 12 is made to extend from the magnetic pole 11 to the outside of the yoke 5 to provide fifth space g5. When excited, a magnetic flux decreases in the spaces g2 and g4, and a magnetic potential difference increases, so that a flux phi2 increases. A magnetic flux phi3 is generated to penetrate the space g5, and an attraction force induced by a flux which penetrates the spaces g1, g2, and g5 increases. By these processes, on attraction force grows large both at the operation starting time and near the end of the operation.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a monostable polar electromagnet applied to electromagnetic switching devices such as relays.

[Conventional technology]

As a conventional monostable polar electromagnet, there is one shown in FIG. 8 that was previously proposed by the inventor. In FIG. 8, the iron core 13 has a coil 14 wound around its outer periphery and is fixed to a substantially U-shaped yoke 15, so that the iron core 13 and the yoke 15 form two gaps 16 and 17. The movable block 18 has two magnetic pole pieces 20 and 21 fixed to both sides of the permanent magnet 19, and is formed into a substantially U-shape. The magnetic pole piece 20 of this movable block 18.
21 are respectively positioned in the two voids 16 and 17 described above to form four main voids. Here, one yoke 15
was formed extending on one side of the magnetic pole, not facing the magnetic pole piece 20.

[Problem to be solved by the invention]

Conventional monostable polar electromagnets are suitable for single b contact operation. However, when it has both an a contact and a b contact, there is a problem in that the excitation attraction force is weak. The present invention has been made in view of the above-mentioned points of the prior art, and its purpose is to increase both the suction force at the start of operation and the suction force near the completion of operation, and to The object of the present invention is to realize high sensitivity of an electromagnetic switching device having contacts.

[Means to solve the problem]

In order to achieve the above object, in the present invention, one main gap is not arranged facing each other, but one end of the central core or yoke is provided on one side of the magnetic pole, or the end of a magnetic pole piece is provided extending on the yoke side. At the same time, one magnetic pole piece is raised in a substantially U-shaped manner outside the yoke or on the opposite side of the central core from the magnetic pole piece! The $2 magnetic pole piece is extended and a fifth air gap is provided.

[Effect]

At the start of operation, the monostable polarized electromagnet configured as described above is located between the central core or the extended part of one end of the yoke and the magnetic pole piece, or between the end of the magnetic pole piece extended to the yoke side. Because it is close to the yoke, the magnetic flux increases when the coil is excited, which can increase the attractive force, or after the operation is completed, the attractive force can be increased by a second magnetic pole piece extending from one magnetic pole piece. You can make it bigger.

【Example】

Examples will be explained with reference to the drawings. In Figure 1,
A coil 3 is wound around the central core 2 of the approximately E-shaped core 1, and the approximately E-shaped core 1 is wound with a coil 3.
Two air gaps 6.7 are formed at one end of the coil 3 by the yokes 4.5 on both sides of the character-shaped core 1 and the central core 2. The movable block 8 is formed by fixing two magnetic pole pieces 10, 11 on both sides of a permanent magnet 9. Movable block 8 in two gaps 6.7
By positioning the magnetic pole pieces 10 and 11 respectively, the main air gap g++
gx+gzrFi< is formed. In the upper air Fjt, the end of the yoke 4 is extended to the magnetic pole piece 10 side and close to it, and the second magnetic pole piece 12 is extended from the magnetic pole piece 11 to the outside of the yaw 25 to provide a fifth gap g5. . FIG. 1 shows a non-excited state, and since the main gap g2rg< is very small, most of the magnetic flux of the permanent magnet 9 passes through the loop φ1 and is held there. In this state, when the upper part of the coil 3 is excited to become the S pole, the magnetic flux decreases in the upper air Fjt gzrg4, and the main air gap gl+
Since the magnetic potential difference in gs increases, the magnetic flux φ2 increases. Here, in the main gap g+, since the end of the yoke 4 and the magnetic pole piece 10 are close to each other, the magnetic flux φ2 is larger than in the case of the opposing gap. On the other hand, a magnetic flux φ passing through the air gap gs is also generated, and the air gap g++
As the attractive force due to the magnetic flux passing through gt+[r5 increases, the movable block 8 moves to the left, and in the state shown in vJ2, the magnetic flux φ passes in addition to the magnetic flux φ2, resulting in a very large attractive force. FIG. 3 shows another embodiment of the present invention, in which the yoke 4 is shortened and the end of the magnetic pole piece 10 is bent toward the yoke 4 so as to be close to it, but the rest is the same as the embodiment shown in FIG. 1. . In this case, since the yoke 4i portion and the magnetic pole piece 10 are close to each other in the main gap g1, the magnetic flux when the coil 3 is excited increases and the attractive force can be increased. A very large attractive force can be obtained by the magnetic pole pieces 12. FIG. 4 shows another embodiment of the present invention, in which a part of the central core 2 is extended toward the magnetic pole piece 11 side, and the main air gap Fis is not opposed to each other but is close to each other. 3@Magnetic flux is large in the loop passing through the main gap g3, and the attractive force can be increased. FIG. 5 shows still another embodiment of the present invention, in which the yoke 5 is bent above the central core 3, and the end of the yoke 4 is bent to extend toward the magnetic pole piece 10. The state shown in FIG. 6 is reached, and the attraction force can be increased by the magnetic pole piece 11 and the yoke 5. FIG. 7 shows still another embodiment of the present invention, in which the yoke 5 is bent from the lower side toward the central core 2, and the same effect as the embodiment shown in FIG. 6 can be obtained. Effects of the Invention Since the present invention is configured as described above, both the suction force at the start of the operation and the suction force near the completion of the operation can be increased.
This has the effect of increasing the sensitivity of an electromagnetic switching device having contacts and b-contacts.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of an embodiment of the present invention in a state before the operation starts, FIG. 2 is a vertical cross-sectional view of the same after the operation is completed, and FIG.
4 is a longitudinal sectional view of another embodiment of the invention, FIG. 5 is a longitudinal sectional view of yet another embodiment of the invention before operation, FIG. 6 is a longitudinal sectional view of the same state after completion of the above operation, FIG. 7 is an exploded perspective view of still another embodiment of the present invention, and FIG. 8 is a longitudinal sectional view of the conventional example. 1 is a substantially E-shaped core, 2 is a central core, 3 is a coil, 4 is a yoke, 5 is a yoke, 6 is a gap, 7 is a gap, 8 is a movable block, 9 is a permanent magnet, 10 is a magnetic pole piece, 11 is a magnetic pole piece, 1
2 is the second magnetic pole piece, g, to g are the main gaps, and gs is the fifth gap. Agent Patent Attorney Ishi 1) 艮 7th Figure 7

Claims (1)

[Claims] (1) A coil is wound around the center core of a substantially E-shaped core, and two air gaps are formed at one end of the coil by the yokes on both sides of the substantially E-shaped core and the center core, and two air gaps are formed at one end of the coil. A monostable type having four main gaps formed by forming a substantially U-shaped movable block with magnetic pole pieces provided in the two gaps, and positioning the two magnetic pole pieces of the movable block in the two gaps, respectively. In a polarized electromagnet, one main gap is not arranged facing each other, but one end of the central core or yoke is extended to one side of the magnetic pole, or the end of a magnetic pole piece is extended to the yoke side, and the end of the central core or the yoke is extended to the yoke side, and the end of the central core or the yoke is extended to the yoke side, and the end of the central core or the yoke is extended to the yoke side, and the end of the central core or the yoke is extended to the yoke side. A monostable polarized electromagnet characterized in that a second magnetic pole piece is formed extending outside the yoke or opposite to the magnetic pole piece of the central core in a character shape, and a fifth air gap is provided.