JPH0445212Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to an electromagnetic device used for opening and closing contacts of a polarized relay.

[Background technology]

Conventionally, electromagnet devices, such as those of the balanced armature type, have an armature block with a permanent magnet placed on the side of the coil of the electromagnetic block, and only a portion of both blocks are combined. . For this reason, progress has not been made in making electromagnetic devices smaller and thinner. Furthermore, even when a polarized relay is configured, it is difficult to make the relay smaller and thinner because in addition to the space for the electromagnet device, the electromagnet device also requires room for movement.

[Purpose of the invention]

In view of the above, the purpose of this invention is to provide an ultra-thin electromagnetic device.

[Disclosure of invention]

In order to achieve the above object, this device is provided with a yoke at one end of the core, and this yoke extends opposite the core on one side of the core, with its tip facing the free end of the core and a notch. It is divided into two left and right parts with the notch in between, and the parts facing each other with the notch in between are the opposing magnetic pole parts.On the other hand, there is an electromagnetic block whose free end of the iron core is also used as the magnetic pole part, and a notch hole in either side. The armature block is provided with an armature block in which the same side ends of the two magnetic pieces are formed in a U-shape with a permanent magnet sandwiched from both ends in the magnetization direction, and the iron core is arranged in a direction perpendicular to the magnetic pieces. It is flattened so that the thickness is thin, and the two magnetic pieces of the armature block fit into the notch to the extent that they do not come out of the yoke, and the magnetic pole part of the iron core fits between the two magnetic pieces of the armature block. The gist is an electromagnet device in which both blocks are assembled so as to fit between the pieces, and the armature block is moved in the forward and reverse directions within the notch by the action of the coil and the permanent magnet. Hereinafter, embodiments of this invention will be described in detail with reference to drawings.

FIG. 1 shows a first embodiment of this invention. As seen in the figure, this electromagnetic device is
It comprises an electromagnet block 1 and an armature block 2. In the electromagnetic block 1, a generally L-shaped yoke 4 is provided at one end of an iron core 3, and this yoke 4 extends opposite to the iron core 3, so that the electromagnetic block 1 has a generally U-shape as a whole. The distal end of the yoke 4 is divided into left and right parts toward the free end of the iron core 3, and protrusions 4b and 4c facing each other with a notch 4a in between serve as opposing magnetic pole parts. On the other hand, the iron core 3 is inserted into an axial hole of a coil frame 6 around which a coil 5 is wound, and its free end serves as a magnetic pole portion 3a. The armature block 2 has a U-shape in which two opposing magnetic pieces 7 and 8 sandwich one permanent magnet 9 from both ends in the direction of magnetization. Armature block 2
In this case, the sides of the two magnetic pieces 7 and 8 that sandwich the permanent magnet 9 enter into the notch 4a of the yoke 4. At the same time, the magnetic pole portion 3a of the iron core has entered into the armature block 2. In this way, the electromagnet block 1 and the armature block 2 are combined. Iron core 3 and its free end magnetic pole part 3
A is flattened so that the thickness in the direction perpendicular to the magnetic pieces 7 and 8 (vertical direction in FIG. 1) is thinner. The armature block 2 includes a coil 5 and a permanent magnet 9.
, the yoke 4 moves in the forward and reverse directions (directions of arrows A and B) within the notch 4a of the yoke 4.
That is, as shown in FIGS. 2a and 2b, a current of a certain polarity is passed through a coil (not shown), and the N pole of the magnetic pole part 3a at the free end of the core is connected to the opposing magnetic pole parts 4b and 4c.
When energized to the S pole, the armature block 2 moves in the direction of arrow B due to the repulsion of the same polarity and the attraction of the different polarity, resulting in the state shown in FIG. 2a. A current of opposite polarity is passed through the coil, and the magnetic pole part 3 at the free end of the iron core is
When a is excited to the S pole and the opposing magnetic pole parts 4b and 4c are excited to the N pole, the armature block 2 moves in the direction of arrow A due to repulsion of the same polarity and attraction of the different polarity, resulting in the state shown in Fig. 2b. . In this case, in this electromagnet device, the notch hole 10 is formed in one of the two magnetic pieces 7 and 8 of the armature block 2, so that the magnetic piece 7 is Its cross-sectional area is smaller than that of the other magnetic piece 8, and its magnetic resistance is larger than that of the other magnetic piece 8. When the armature block 2 is energized, it takes the two states mentioned above, but when it is not energized, it has a state with low magnetic resistance (the state shown in Figure 2b) and a state with high magnetic resistance (the state shown in Fig. 2b). Since this is a more magnetically stable state than the state shown in FIG. 2a), the state shown in FIG. 2b is maintained. On the contrary, a notch hole 10 is formed in the magnetic piece 8,
When it is not formed on the magnetic piece 7,
The state shown in FIG. 2a is the state in which the armature block 2 is stable. In other words, this electromagnetic device is of a single stable type.

The electromagnet device of this invention is not limited to the above-mentioned embodiments, and various types can be made. For example, the iron core and the yoke may be formed integrally from the beginning, or may be formed separately and then integrated by caulking or the like. The iron core and the magnetic pole part, and the yoke and the opposing magnetic pole part may be formed integrally from the beginning, or may be formed separately and then integrated. The shape of the coil frame is not limited to that shown in FIG. 1, but may be a normal thread-wound shape or other shapes. However, it is preferable if the shape of the coil frame is as shown in FIG. 1, since magnetic shielding from the outside on the iron core side can be achieved. Further, in the above example, the magnetic piece of the armature block fits into the notch of the U-shaped yoke so that it is flush with the notch, but it may naturally fit inside the cutout.

[Effect of idea]

As seen above, in the electromagnet device of this invention, an armature block having a permanent magnet is inserted into a notch at the tip of a yoke extending from one end of the iron core to face the iron core, and a magnetic pole at the free end of the iron core is The electromagnet block and the armature block are combined so that the armature block fits into the armature block,
The iron core is flattened so that the thickness in the direction perpendicular to the magnetic pieces of the armature block is thinner, and the armature block is constructed so as not to protrude outside the yoke. Therefore, this electromagnetic device
It is much thinner and smaller than conventional electromagnetic devices, and does not require any external movement space. When the electromagnet device of this invention is applied to a relay, a small and thin polarized relay can be obtained.

Furthermore, in the electromagnet device of this invention, by forming a notch hole in one of the two magnetic pieces of the armature block, a magnetic imbalance is created between the two magnetic pieces, and single stabilization is achieved. It is planned. For example, as shown in FIG. 3, this single stabilization is achieved by cutting out a part of one of the opposing magnetic pole parts 4b and 4c as shown by the dashed line in the figure, without providing a notch hole in the magnetic piece. , may cause magnetic imbalance, and although not shown in the diagram,
It is possible to create a magnetic imbalance by notching a part of the end facing one of the opposing magnetic poles of two pieces of magnetic material, but in such a case, it is possible to create a notch. This may cause problems in the contact of the notched opposing magnetic pole portion or the notched magnetic material piece with the other party. On the other hand, if the notch hole is provided inside the magnetic piece, the magnetic piece and the opposing magnetic pole part will come into perfect contact with each other, so that the stroke accuracy of the armature block will be extremely stable.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of this invention, FIGS. 2a and 2b are partial side views showing the operating state of the embodiment, and FIG. 3 is a perspective view of a comparative example of this invention. 1... Electromagnetic block, 2... Armature block, 3... Iron core, 3a... Magnetic pole part at the free end of the iron core,
4... Yoke, 4a... Notch, 4b, 4c...
Opposing magnetic pole portion, 5... Coil, 7, 8... Magnetic material piece, 9... Permanent magnet.

Claims (1)

[Scope of utility model registration request] A yoke is provided at one end of the iron core, and this yoke extends opposite the iron core on one side of the iron core, and its tip faces the free end of the iron core and is divided into left and right halves with a notch in between. An electromagnetic block in which the opposing parts are the opposing magnetic pole parts, and the free end of the iron core is also the magnetic pole part, and two magnetic pieces on the same side with a cutout hole formed in one of them. and an armature block whose ends are U-shaped with the permanent magnet sandwiched from both ends in the magnetization direction, and the iron core is flattened so that the thickness in the direction perpendicular to the magnetic material piece is thinner,
Both blocks are assembled so that the two magnetic pieces of the armature block fit into the notch to the extent that they do not come out of the yoke, and the magnetic pole part of the iron core fits between the two magnetic pieces of the armature block. An electromagnetic device in which an armature block is moved in forward and reverse directions within the notch by the action of a coil and a permanent magnet.