JPS5846608A - Polarized electromagnet - Google Patents

Abstract

PURPOSE:To eliminate the loss of magnetic flux by making the magnetic flux of a coil reach magnetic gaps without passing through a permanent magnet. CONSTITUTION:When magnetic flux shown by the broken line is generated within a yoke 1 by exciting a coil 4, the magnetic flux polarization arises in magnetic gaps 10 at both sides of an armature 12 because a permanent magnet 7 produces its magnetic flux in the direction shown by the solid line. This polarization causes the free end part of the armature 12 to rotate in the direction indicated by the arrow and more a movable frame 13 engaging the armature in the same direction, thereby making contact between a fixed contact 22 and a movable contact 20 while breaking contact between a fixed contact 21 and a movable contact 19. At this time the magnetic flux by the coil 4 does not pass through the inside of the parmanent magnet 7, therefore, all the magnetic flux acts upon the magnetic gaps 10, reducing the loss of the magnetic flux and improving the electromagnet's sensitivity and responsiveness.

Description

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

Recently, there has been a desire to provide a thin and highly sensitive polarized relay that is suitable for mounting on a PC board, but in general, in conventional polarized electromagnets, there is a permanent wire in the magnetic path through which the magnetic flux passes through the coil. 9. The structure has a magnet. Since the magnetic resistance of such a permanent magnet is almost as high as that of the air, most of the magnetic flux from the coil is lost in 1 minute except for the magnetic gear that generates the magnetic attraction, and this is due to the high sensitivity of the electromagnet. The circle that is causing the obstruction.

This proposal was made in consideration of the points stated in the work description of the present invention, and its purpose is to effectively utilize the magnetic flux by allowing the magnetic flux from the coil to reach the magnetic gap without passing through the permanent magnet, and to increase the efficiency of the magnetic flux. The object of the present invention is to provide a polarized electromagnet that enables sensitivity.

Therefore, the present invention combines the first invention shown in FIGS. 1 to 1O and the second invention capable of monostable operation shown in FIGS. 11 to 1U.
181 to 10 below.
Embodiments of the first invention will be described along with the drawings.

FIG. 1 shows the first embodiment. In the figure, a substantially C-shaped yoke 10 has a coil 4 wound around the base piece 2 via a coil frame 3. A permanent magnet 7 is disposed in between, in contact with the side pieces 5 and 6, and whose center portion and both end portions in the longitudinal direction are magnetized with different polarities. A pair of opposing pieces 8 and 9, each perpendicular to the strip 5.6 and parallel to the base piece 2, are arranged in a straight line with a magnetic gap 10i between them. An inverted type movable armature ν having a fulcrum 11 is disposed.

In Fig. 1 ←), a movable frame 13 made of a plastic product is arranged parallel to the facing piece 8.9, and a recess 14 formed approximately at the center in the length direction is located in the armature ν. Engaged to the free end.

In other words, as the amateur subject rotates, the movable frame U engaged in the recess 14 can move from side to side in the figure. The engaged holding springs 16 are connected to and supported by the side pieces 5 and 6 of the yoke 1, and the free ends of contact springs 17 and 18 are fixed at both ends of the movable frame 13. The movable contacts 19 and 2 are provided at the free ends of the movable contacts 19 and 2, respectively.
0 faces the fixed contacts 21 and 22, respectively.◎ However, the operation depends on the excitation of the coil 4, for example, the first
11N>, magnetic flux in the direction shown by the broken line is generated in the yoke 1, and the direction of the magnetic flux due to the permanent magnet 7 is as shown by the solid line. It causes bias, a! The free end of the chair will rotate in the direction of the arrow in the figure. Therefore, the movable frame n engaged with the armature ν also moves in the same direction,
The fixed contact n and the movable contact are closed, and the fixed contact 2 is closed.
1 and the movable rear point trout are separated.

At this time, in the present invention, since the magnetic flux from the coil 4 does not pass through the inside of the permanent magnet 7, all the magnetic flux acts on the magnetic gap 1G, so there is no loss of magnetic flux, and the sensitivity and responsiveness of the electromagnet are improved. There are advantages that can be achieved.

FIG. 2 shows a second embodiment. In this example, permanent magnets 7a and 7b are formed by dividing a permanent magnet into permanent magnets 7a and 7b whose opposing parts are magnetized with the same polarity, and the length of an inverted armature ν is The center part in the horizontal direction is pivotally supported at the fulcrum 11, and the armature 12
At once, move the free part of Tatsuyoshi between the gap lO and the permanent magnet r
*, tb, and its operation and structure of the movable frame and contact pads (not shown) are the same as in the first embodiment. '- Fig. 3 shows a third embodiment, in which a pair of permanent magnets 7a and 7b are connected by a U-shaped piece, and this iron piece 2
It is designed to be used as a 3t magnetic pole.

FIG. 4 shows a fourth embodiment, in which an amateur 12'
It has a kU-shape, and its curved part is a permanent magnet 7a.

7b supported by the fulcrum 11.
- 69 in the fifth embodiment of Figure 5. In this example, the Idw-ri 1 is formed into a U-shape, and the side pieces 5,
A T-shaped O armature 12YI having a piece extending between the open ends of 6 is supported on a fulcrum 11 between permanent magnets 7m and 7b.

FIG. 6 shows the sixth embodiment, and shows the C-shaped and U-shaped corners 1.
An armature ν having a length extending between the open ends of the side pieces 5 and 6 and having a central portion curved in a U-shape is pivotably supported by a fulcrum 11 at the curved portion of the U-shape. 〇In each of the previous embodiments, the permanent magnet 7 or Fi7a was used.

7b is arranged in the internal space of the yoke 1, but as described below, it is also possible to arrange the pair of permanent magnets 7a and 7b in the external space of the yoke 1. That is, as a seventh embodiment. As shown in FIG. 7, permanent magnets 7m and 7b, in which the opposing pieces 8 and 99Ill are magnetized to the same polarity, are mounted on the opposing pieces 8 and 9 of the yoke l, and the permanent magnets 7m and 7b have the other poles. A magnetic pole piece 24 is placed between them, a window hole is bored in the approximate center of the magnetic pole piece U, and the other end of the armature ν, one end of which is disposed in the magnetic gap lo, is made to protrude from the center of the window hole. . Incidentally, the magnetic pole arm is not single as in this embodiment, but may be formed in pairs and mounted on each of the permanent magnets 7m and 7b in a husband-and-wife pattern. However, the operation is such that when the coil 4 is energized and magnetic flux passes through the joke 1 in the direction of the broken line in FIG. 7(a), the permanent magnet 7a
, 7b is generated in the direction shown by the solid line in the figure, so the magnetic gap lO at the lower end of the armature ν
The magnetic flux is unevenly distributed, the lower end of the armature 12 is attracted to the right side in the figure, and the upper end moves in the direction of the arrow in the figure.

Fig. 8 shows an eighth embodiment in which the armature 12t is formed in an inverted U shape and employs a pair of magnetic pole pieces 24m and 24b, and Fig. 9 shows an armature 12 in the ninth embodiment in a T-shape. In the embodiment shown in Fig. 1O, the armature 12t is disposed parallel to the magnetic pole piece.

In each embodiment of the first invention described above, the permanent magnet 7
The magnetic flux due to e 7 a * 7 b passes through the armature 12 and the magnetic gap lOt to the magnetic gap 10'j-
It is configured so that the magnetic flux passes equally through both ends of the L-ri 1 to be formed.Similarly to the first invention described above, it has a configuration in which the magnetic flux from the coil does not pass through the permanent magnet, and has a monostable operation. 11 to tal II regarding the second invention that makes possible
FIG. 11 shows the first embodiment. In the figure, a permanent magnet 7m is placed on the opposing pieces 8 and 9 of the substantially C-shaped yoke 1, with the opposing pieces 8 and 9 having the same polarity *a.

An L-shaped magnetic pole piece 24m is disposed above one of the permanent magnets, for example 7&, and a magnetic gap is formed between one piece of this magnetic pole piece 24m and the end of the yoke 1. In addition, the other permanent magnet 7 is placed so as to face the other piece of the magnetic pole piece 24m across a magnetic gap.
A flat magnetic pole piece 24b is mounted on the magnetic pole piece 241. The magnetic attraction force of the other permanent magnet 7b is superior to that of the permanent magnet 7a, and the armature ν is lost through the magnetic gap part and the opposing piece 8 of the yoke 10.
It is stably attracted to 4b. When the coil 4 is energized and the magnetic flux passes through the yoke 1 in the direction shown by the broken line in the figure, the magnetic flux is unevenly distributed in the magnetic gap lG of the lower end of the armature, and the magnetic flux from the magnetic pole piece 24m is The upper end of the armature ν rotates in the direction of the arrow in the figure and is attracted to the magnetic pole piece 24m. When the excitation of the coil 4 is stopped, the armature is reversed and the coil is attracted to the magnetic pole piece 24b again. As mentioned above, the monostable operation is possible as shown in Fig. 0, ν, which is the second embodiment. One side piece 6 of the C-shaped yoke 1 is extended, and one opposing piece 9
A magnetic pole piece 24b is placed on the upper end of the permanent magnet 7b and opposed to the magnetic pole piece 24h through a magnetic gap, and a magnetic pole piece 24b is placed on the lower end of the permanent magnet 7b with the other opposing piece 8 placed on the lower end of the permanent magnet 7b through a magnetic gap lO. This is a conflict in which a magnetic gap 26' is formed between the end of the magnetic pole piece 24b and the side piece 6 while facing each other. With such a structure, a closed magnetic path is formed by the permanent magnet 7b], but a closed magnetic path by the rounded permanent magnet 7a with a magnetic gap of % is not formed, and when the coil 4 is not excited, the upper end of the armature ν is It is attracted to the opposing piece 9 side, and when the coil 4 is energized, it is attracted to the one end IB wire magnetic pole piece 24a side of the armature 12 due to the direction of each magnetic flux as shown in the figure, thereby achieving a monostable operation. 13111IIi Third embodiment Shown is a magnetic pole piece 24a.

By changing the plate thickness, width, length, material, etc. of 24b, the magnetic resistance between both magnetic poles 24 m, 241) and the armature ν can be changed, and the magnetomotive force can be increased by changing the external shape and material of the permanent magnet. When the coil 4 is not energized, the armature 12 is attracted to either the left or right magnetic pole pieces 24a, 24b, and when the coil 4 is energized, the armature 12 is reversed. In this way, in each embodiment of the second invention, the magnetic flux from the permanent magnets 7m, 7b is transferred to the magnetic pole pieces 24m, 24b, which are connected to the permanent magnets 7m, 7b.
According to the present invention, as described above, the first and second inventions In any of these? Because the magnetic flux from the coil reaches the magnetic gap without passing through the permanent magnet,
There is no loss of magnetic flux from the dill, and almost all the magnetic flux can contribute to the drive of the armature, which has the effect of increasing the sensitivity of polarized electromagnets and polarized electric appliances, and it is easy to create polarized electromagnets for monostable operation. There is a basic origin that can be constructed as follows.

[Brief explanation of the drawing]

1 to 1O show each embodiment of the first invention, FIG. 10) is a diagram showing the main part of the first embodiment, and FIG. FIGS. 2 to 6 are explanatory diagrams of the main parts of the second to sixth embodiments, respectively. FIG. 7(A) is a clear view of the main parts of the seventh embodiment. (B) is also a perspective view, and Figures 8 to io are 8th to 10th views, respectively.
11 to 13 are explanatory diagrams of the main parts of the embodiment.
FIG. 3 is an explanatory view of the main parts of seven embodiments of the invention, respectively. , 1... Yoke, 4... Coil, 7, 7, J, 7b...
・Permanent magnet, 10...Magnetic gap, Le...
...Amateur, 24m, 24b...Magnetic pole piece Patent applicant: Matsushita Electric Works Co., Ltd.

Claims (2)

[Claims] (1) When a rotatable armature -S is disposed within the magnetic gap of a substantially C-shaped yoke formed by winding a coil, the armature is magnetized so as to standby in a neutral state. A good permanent magnet is disposed outside the magnetic gap, and the magnetic flux from the permanent magnet is configured to uniformly pass through the armature and the magnetic gap to both ends of the yoke forming the magnetic gap. A polar electromagnet characterized by: (2) A part of a rotatable armature is placed within the magnetic gap of a substantially C-shaped yoke formed by winding a coil, and a pair of permanent magnets are placed outside the magnetic gap on both sides of the armature. so that the magnetic flux from the permanent magnet is passed unevenly through the magnetic pole pieces connected to the permanent magnet, the armature, and the magnetic gap to both ends of the magnetic field forming the magnetic gap. A polarized electromagnet characterized by having the following structure.