JPH01215003A - Electromagnetic device - Google Patents

Abstract

PURPOSE:To reduce magnetic resistance in a coil frame and to improve electromagnetic attracting force, by positioning an auxiliary member consisting of a magnetic body at a fixed position between a coil frame and an armature at the side of a pole piece in the armature oscillation direction at an end opposite to an end into which the pole piece is inserted in the axial direction of the coil frame. CONSTITUTION:An auxiliary member 15 consisting of a magnetic body is arranged within the end of the opposite side of a pole piece 14 in a coil frame 10. The auxiliary member 15 is arranged at a position where it can be in contact with a part of an armature 13 and also does not prevent oscillation of the armature 13. When a coil 11 is excited, the left edge of the armature 13 is attracted to the pole piece 14 to form a closed magnetic circuit through a yoke 12 and the pole piece 14. When the closed magnetic circuit is formed, the pole piece 14 and the auxiliary member 15 are bridged through the armature 13, thus increasing the sectional area of magnetic path within the coil frame 10. Since the magnetic resistance is thereby reduced and magnetic saturation hardly develops, the attracting force can be increased.

Description

[Detailed description of the invention] [Industrial application field 1 The present invention is an electromagnet! ! It is related to the reason.

[Prior Art 1] Conventionally, an electromagnetic device has been provided which includes a yoke 12 and an armature 13 shaped as shown in FIG. 9-2
12 has a magnetic pole piece 14 at one end, and as shown in FIG. It extends along the outer surface of the frame 10 to near the other end of the coil frame 10 in the ring direction, and one end of the armature 13 is pivotally supported at this end.

The armature 13 has an abbreviated shape, and its half is the coil frame 10.
It is inserted into the inside so that it can swing freely. A part of the armature 13 forms a 7-king gap with the magnetic pole piece 14, and when the coil 11 is not energized, the armature 13
3 is spring biased away from the pole piece 14.

However, when the coil 11 is excited, the armature 13 is attracted to the magnetic pole piece 14, and a closed magnetic path passing through the yoke 12 and the armature 13 is formed.

[Problems to be Solved by the Invention] In the above configuration, in order to reduce power consumption, it is necessary to increase the coil constant (turn WL), and if coil frames of the same size are used, the coil frame It is necessary to reduce the inner diameter of the

In other words, because the cross-sectional area of the part of the armature that is inserted into the coil frame and the magnetic pole piece is limited, magnetic flux tends to concentrate in the part that is inserted into the coil frame, which tends to cause magnetic saturation and reduce the electromagnetic attraction force. There is a problem in that it causes a decrease in

The present invention aims to solve the above-mentioned problems, and provides an electromagnet device with improved electromagnetic attraction force as a structure that can reduce magnetic resistance within a coil frame.

[Means for Solving the Problems 1] In order to achieve the above-mentioned object, the present invention provides a structure in which a magnetic pole piece is inserted at an end in the axial direction of the coil frame opposite to the end in which the magnetic pole piece is inserted, and in the swinging direction of the armature. An auxiliary member made of a magnetic material is disposed at a fixed position between the coil frame and the armature on the same side as the magnetic pole piece.

Further, the main body of the coil frame may be formed of a permanent magnet magnetized with different polarities in the direction of the swinging force of the armature.

[Production m1 According to the above configuration, by arranging the auxiliary member made of a magnetic material within the coil frame, the cross-sectional area of the member forming the magnetic path within the coil frame increases, making it difficult for magnetic saturation to occur. Therefore, the electromagnetic attractive force increases.

In addition, in a configuration where the main body of the coil frame is made of a permanent magnet,
The magnetic force of the permanent magnet can be combined with the magnetic force of the coil, resulting in high magnetic efficiency.

[Example 11] As shown in FIG. 1, a coil 11 is placed in a cylindrical coil frame 10.
0g-212 is wound with one end inserted into one end of the coil frame 10 to form the magnetic pole piece 14, and the end Wl is inserted into the other end of the coil frame 10 along the outer periphery of the coil frame 10. It is extended to near the outer periphery.

One end of an abbreviated armature 13 is pivotally supported at the other end of the seek 12, and the other end of the armature 13 is inserted into the coil frame 10. That is, #: the pole 13 is the yoke 12
The coil frame 10 is arranged so as to be able to swing within the coil frame 10. Magnetic pole piece 1 within coil frame 10
In the end opposite to 4, there is an auxiliary member 1 made of a magnetic material.
5 is arranged. This auxiliary member 15 is arranged at a position where it can come into contact with a part of the armature 13 inserted into the coil frame 10 and at a position where it does not interfere with the swinging of the armature 13.

The auxiliary member 15 is attached to the coil frame 10 by adhering it to the coil frame 10 or molding it simultaneously with the coil frame 10. The armature 13 is appropriately biased by a spring away from the pole piece 14 when the coil 11 is not energized.

However, when the coil 11 is excited, one end of the armature 13 (the left end in FIG. 1) is attracted to the magnetic pole piece 14, and an m magnetic path passing through the seek 12 and the magnetic pole piece 14 is formed. Here, when the closed magnetic path is formed, the magnetic pole piece 14 and the auxiliary member 15 are bridged via the armature 13, and the cross-sectional area of the magnetic path within the coil frame 10 becomes large. ,
Because magnetic resistance is reduced and magnetic saturation is less likely to occur,
This means that the suction power can be increased.

[Embodiment 21] In this embodiment, as shown in FIG. 2, the coil frame 10 is formed of a permanent magnet. This coil frame 10 has a third
As shown in the figure, the coil frame 10 is magnetized with different polarities across one plane including the pongee, so that the direction of magnetization and the direction of swing of the armature 13 match. Further, the auxiliary member 15 is not provided, and although it is preferable that the coil frame 10 be formed of a plastic magnet, it may also be configured such that a permanent magnet is embedded in a synthetic resin.

As shown in FIG.
Assuming that it is in contact with A, when the coil 11 is in a non-excited state, the tip i of the armature 13 comes into contact with the S pole of the coil frame 10, as shown in PIS 2 (a), so that A closed magnetic path from the north pole to the south pole of the coil frame 10 is formed through the yoke 12 and the armature 13, and at this point, the magnetic pole piece 14 and the armature 13 are separated. On the other hand, if the coil 11 is excited so that a magnetic field pointing to the right in FIG. is repelled by the S pole of the coil frame 10 and is attracted to the magnetic pole piece 14.

According to this configuration, since a permanent magnet is disposed within the coil 11, a highly efficient electromagnetic device with less leakage of magnetic flux can be realized. Furthermore, since the armature 13 is returned to its original position by the magnetic force of the permanent magnet, there is no need to provide a return spring, which has the advantage of reducing the number of parts. Moreover, if the coil frame 10 is made of a plastic magnet, the coil frame 1
Even though 0 is a permanent magnet, the coil frame 10 is prevented from cracking when the armature 13 and the coil frame 10 collide.

[Application example 1] In this configuration, as shown in FIG.
A swinging fulcrum is provided at the center in the longitudinal direction of the coil frame 1.
0 in the swinging direction of the armature 13 as in Example 2.
It is made of a permanent magnet that is magnetized to have a % polarity.

According to this configuration, the coil 11
When the coil 11 is excited so that the right end is Nm, the state shown in Fig. 4(b) is obtained, and when the coil 11 is excited from the state of tIS4(b) so that the left end is Nff1, the state shown in Fig. 4(a) is obtained.
This results in a state of In addition, in each state shown in FIG. 4(,)(b), both poles of the coil frame 11 are bridged via the armature 13, so the position of the #i pole 13 is maintained, resulting in bistable operation. This is what we do.

Effects of the Invention 1 As described above, the present invention provides a method for attaching a coil at the end opposite to the end where the magnetic pole piece is inserted in the axial direction of the coil frame and on the same side as the magnetic pole piece in the swinging direction of the armature. Since the auxiliary member made of magnetic material is placed at a fixed position between the coil frame and the armature, the cross-sectional area of the member forming the magnetic path within the coil frame increases, reducing magnetic resistance. This has the advantage that magnetic saturation is less likely to occur and electromagnetic attractive force increases.

In addition, if the main body of the coil frame is made of permanent magnets that are magnetized with different polarities in the swinging direction of the armature, the magnetic force of the permanent magnet can be applied in combination with the magnetic force of the coil, resulting in high This results in magnetic efficiency.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing Embodiment 1 of the present invention, and FIG. 2 (aH
b) is a cross-sectional view of a non-excited state and an energized state showing a second embodiment of the present invention, FIG. 3 is a perspective view showing a coil used in the same, FIG. 4 is an operation explanatory diagram showing an application example, and FIG. is a sectional view showing a conventional example,! FIG. 16 is an exploded perspective view showing a yoke and an armature used in the same. DESCRIPTION OF SYMBOLS 10... Coil frame, 12... Yoke, 13... Armature, 14... Magnetic pole piece, 15... Auxiliary member. Agent Patent Attorney Ishi 1) Ai ShichiQ rQ

Claims (2)

[Claims] (1) One end has a magnetic pole piece inserted into one end of the coil frame in the axial direction, and the other end is exposed outside the coil frame, and one end is a yoke outside the coil frame. The armature includes an armature that is pivotally supported and is swingably inserted into the coil frame, and a working gap is formed between the other end and the magnetic pole piece, and the magnetic pole piece is inserted in the axial direction of the coil frame. An auxiliary member made of a magnetic material is disposed at a fixed position between the coil frame and the armature at the end opposite to the end with which the armature swings and on the same side as the magnetic pole piece in the swinging direction of the armature. An electromagnetic device characterized by: (2) A yoke with a magnetic pole piece inserted into one axial end of the coil frame at one end and the other end exposed outside the coil frame, and a yoke with one end outside the coil frame. The main body of the coil frame is provided with an armature in which a working gap is formed between the other end portion which is pivotally supported and is swingably inserted into the coil frame and the magnetic pole piece. An electromagnetic device characterized in that it is formed of permanent magnets magnetized with different polarities by smell.