JPS63198306A - Polarized electromagnet device - Google Patents

Abstract

PURPOSE:To obtain a polarized electromagnet device having excellent operation characteristics by mounting a permanent magnet in a specific magnetic path forming unit arranged between the inner surfaces of both right and left side legs of a core. CONSTITUTION:A permanent magnet 7 is secured to the center of a magnetic path forming unit 3 provided between the inner surfaces of both right and left side legs of a U-shaped core 1, and a movable iron piece 8 arranged over between both side legs 1a and 1b of the core 1 so that its center come into contact with the magnet 7 is rotatably set at the center. The left end 8a of the piece 8 is attracted to the left side leg 1a of the core 1 by the magnetic flux of the magnet 7 in the state that a coil 2 is not energized, an exciting magnetic flux to cancel the magnetic flux of the magnetic flux is generated when the coil 2 is energized, the piece 8 is rotated clockwise at its pivot 8c as a center, and the left end 8b is attracted to the right side leg 1b. Here, since the magnet 7 and the piece 8 are separately provided, the inertia of the piece 8 in case of rotatably displacing it becomes small. Thus, its operation time can be shortened, and the operation can be stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a polar electromagnet device used in a relay or the like.

<Prior art and its problems> As shown in FIG. 8, as a conventional device of this kind, a coil 1 is attached to the connecting piece portion 101c of a U-shaped iron core 101 which is formed by connecting left and right leg portions 101aj01b with a connecting piece portion 101c.
02 and a movable iron piece 104 with a permanent magnet 103 fixed to the lower surface is attached to both side legs 101a and 10 of the iron core 101.
1b, and the permanent magnet 10
There is one in which the central lower surface of the holder 3 is rotatably supported by a support member 105. In the non-excited state where the coil 102 is not energized, the magnetic flux of the permanent magnet 103 causes the movable iron piece 104 to
For example, the right end portion 104b is the right leg portion 101b of the iron core l.
When the coil 102 is energized and the coil 102 is energized, the permanent magnet 103 is attached to the right leg 101b.
Since the magnetic flux passing through the core 10 is canceled by the excitation magnetic flux, the movable iron piece 104 rotates to the opposite side, and the left end 104a touches the iron core 10.
It is adapted to be attracted to the left leg portion 101a of No. 1.

However, in the above-mentioned conventional device, since the permanent magnet 103 is integrated into the movable iron piece 104, the inertia of the movable iron piece 104 becomes large, which increases the operating time when configuring a relay, and also makes it difficult for the contact mechanism. The impact becomes large, which tends to cause malfunctions.Furthermore, since the lower surface of the permanent magnet 103 forms an open magnetic path, leakage of magnetic flux is large, resulting in low magnetic efficiency.

<Purpose of the Invention> This invention has been made to solve the problems of the above-mentioned conventional ones, and is a simple method in which permanent magnets are installed in specific magnetic path forming bodies arranged between the inner surfaces of the left and right legs of the iron core. It is an object of the present invention to provide a polarized electromagnet device that has excellent operability and high magnetic efficiency due to its configuration.

<Structure and Effects of the Invention> The polarized electromagnet device according to the present invention has a magnetic path forming body set such that a portion with high magnetic resistance exists in the central portion between the inner surfaces of both left and right sides of a U-shaped core. A permanent magnet whose upper and lower surfaces are magnetized with different polarities is fixed in the center, and a movable iron piece, which is disposed astride between both legs of the iron core and whose center abuts the permanent magnet, is rotated in the center. It is set to be movable.

According to this invention, since the permanent magnet and the movable iron piece are separated and made into separate bodies, the inertia of the movable iron piece is reduced, reducing operating time, and the impact on the contact mechanism is also reduced, resulting in stable operation. can be achieved.

In particular, since the permanent magnet is provided in the magnetic path forming body, the magnetic path of the permanent magnet and the magnetic path of the excitation magnetic flux are closed, and since there is a high magnetic resistance part in the center of the magnetic path forming body, the magnetic path forming body The magnetic flux passing through can be effectively utilized for magnetic attraction, and therefore the magnetic properties can be improved.

<Explanation of Examples> Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an example of a polarized electromagnet according to the present invention. In the figure, reference numeral 1 denotes a U-shaped iron core formed by connecting left and right leg portions 1a and lb by a connecting piece IC, and a coil 2 is wound around the connecting piece 1c. Reference numeral 3 denotes a magnetic path forming body disposed between the inner surfaces of the left and right leg portions of the iron core I, and is composed of a pair of left and right plate-shaped yokes 4 and 5. The base end sides of these yokes 4.5 are both leg portions 1a of the iron core 1, respectively.

1b, and a predetermined gap 6 is set between each tip, and this gap 6 constitutes a high magnetic resistance section in the center of the magnetic path forming body 3. .

A permanent magnet 7 is fixed across the tips of the yokes 4 and 5, and is magnetized to have an N pole on the upper surface and an S pole on the lower surface.

Reference numeral 8 denotes a plate-shaped movable iron piece disposed astride between both side legs 1a and lb of the above-mentioned iron core 1.
(M + communication: Buddha Tsuzuri Nakako Qing Koo q.Mo 1 pull ↓ By bringing it into contact with the magnet 7, the movable iron piece 8 is set to be rotatable in the central part.

Next, the operation of the above configuration will be explained.

In the non-excited state where the coil 2 is not energized, the magnetic flux φA of the permanent magnet 7 as shown in FIG.
A magnetic path from the left end 8a of the movable iron piece 8 to the permanent magnet 7 via the left leg 1b and the left yoke 4 of the iron core 1. is formed. As a result, the left end portion 8a of the movable iron piece 8 is attracted to the left leg portion 1a of the iron core l.

When the coil 2 starts to be energized, an excitation magnetic flux φ8 is generated that cancels the permanent magnetic flux φ^ as shown in FIG. The adsorption force against the movable iron piece 8 is lost, and the movable iron piece 8 begins to rotate clockwise about the pivot portion 8c. Along with this, the magnetic flux φC of the permanent magnet 7 reaches the permanent magnet 7 from the right end 8 of the movable iron piece 8 through the right leg ib of the iron core l, the connecting piece 1c, the left leg la, and the left yoke piece. magnetic path and
” From the right end 8b of the movable iron piece 8 to the right leg 1 of the iron core 1
b. A magnetic path is formed that passes through the right yoke 5 and reaches the permanent magnet 7.

When the coil 2 is in an energized state by being energized, the right end 8b of the movable iron piece 8 is attracted and held on the right leg 1b of the iron core 1 by the magnetic path of the excitation magnetic flux φB and the magnetic path of the magnetic flux φC of the permanent magnet 7.

Here, since the permanent magnet 7 and the movable iron piece 8 are constructed as separate bodies, the inertia of the movable iron piece 8 during rotational displacement is reduced, and the operating time can be shortened. Moreover, when a relay etc. is configured.

The movable iron piece 8 is prevented from impacting the contact mechanism, thereby stabilizing the operation. In other words, it becomes possible to cope with shocks and the like.

Also, since the permanent magnet 7 is installed on the yoke 4 and 5,
The magnetic paths of the magnetic fluxes φA and φC of the permanent magnets 7 and the magnetic path of the excitation magnetic flux φB are closed, and since there is a high magnetic resistance part due to the air gap 6 between the yoke 4.5, the above magnetic flux becomes an attractive force. It is supplied in the effective direction, and the magnetic efficiency can be improved.

On each fixed end side of the pair of yokes 4 and 5, a third
Horizontal bent piece 3 along the movable iron piece 8 as shown in the figure
1.32, the adsorption area with the movable iron piece 8 becomes larger, and the magnetic attraction force can be further improved.

FIGS. 4(A) and 4(B) show another embodiment of the present invention, in which the magnetic path forming body 3 is attached to both side legs 1a of the iron core 1.

It is composed of one yoke 40 installed between the yoke 3 and the yoke 3, and a rectangular hole 41 forming a high magnetic resistance part is formed in the center of the yoke 3.

This configuration has the advantage of not only producing the same effects as those of the embodiments described above, but also reducing the number of parts and making assembly easier.

The high magnetic resistance part formed in the center of the yoke 40 may be formed of an oblong hole 51 as shown in FIG. Various modifications are possible, such as configuring it with the grooved portion 71 shown in the figure. It is also possible to connect the pair of yokes 3.4 with a magnetically non-permeable material and integrate them.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a polar electromagnet device according to the present invention, FIGS. 2(A) to (G) are operation explanatory diagrams of the same polar electromagnet device, and FIG. A perspective view showing a deformed structure of a pair of yokes; FIGS. 4A and 4B are an exploded perspective view and an assembled perspective view showing other embodiments of the invention; FIGS. 5 and 6; 7 and 7 are diagrams showing modified examples of the high magnetic resistance portion of the yoke, respectively, and FIG. 8 is a schematic configuration diagram of a conventional polarized electromagnet device. l...iron core, la, lb...both legs, IC...
Connection piece portion, 2... Coil, 3... Magnetic path forming body, 4
,5゜40... Yoke, 6... High magnetic resistance part, 7...
・Permanent magnet, 8... Movable iron piece, 41... Rectangular hole,
51...Oval hole portion, 61a, 61b...Notch portion, 7
1...Groove section. Fig. 1 4.52g<shi = (- Fig. 2 Fig. 3 Fig. 4 (A) 1 41: Notch shape)
Figure 4 (B)

Claims (3)

[Claims] (1) A U-shaped iron core formed by connecting the left and right legs with a connecting piece, a coil wound around the connecting piece of the iron core, and a coil arranged between the inner surfaces of the legs on both sides of the iron core, A magnetic path forming body having a high magnetic resistance portion in the center, a permanent magnet fixed to the center of the upper surface of the magnetic path forming body and magnetized with different polarities on the upper and lower surfaces, and between the left and right legs of the iron core. A polarized electromagnet device comprising: a movable iron piece arranged astride the permanent magnet and configured to be rotatable at a central portion that abuts the upper surface of the permanent magnet. (2) The magnetic path forming body is constituted by a pair of yokes whose proximal ends are cantilevered to the inner surfaces of the left and right legs of the iron core 1, and whose distal ends face each other with a predetermined gap, A polar electromagnet device according to claim 1, wherein the air gap is set as a high magnetic resistance section. (3) The above-mentioned magnetic path forming body is constituted by one yoke installed between the inner surfaces of the left and right legs of the above-mentioned iron core, and the hole, notch, or groove formed in the center of this yoke has a high magnetic field. A polarized electromagnetic device configured as a resistor.