JPH0440251Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to the structure of a polarized electromagnet having an electromagnet part, a permanent magnet part, and the like.

[Background Art] In this type of conventional polarized relay, which consists of an electromagnet section, a permanent magnet section, etc., the permanent magnet section is arranged below the electromagnet section, which consists of a yoke, an iron core, a coil, etc. It was a structure. Therefore, since the electromagnet part and the permanent magnet part overlap in the vertical direction, there is a problem that the vertical dimension becomes large, making it difficult to reduce the size and thickness.

[Purpose of the invention] The present invention has been provided in view of the above-mentioned points, and provides a structure of a polarized electromagnet that is intended to be smaller and thinner.

[Disclosure of the invention] (Structure) The present invention forms a downwardly concave bent part in the center piece of a substantially U-shaped yoke, and the base end of the iron core, around which the coil is wound, is bent as described above. It is attached to the lower surface of the bent part of the central piece of the yoke, and a step portion recessed downward is formed on the top surface of the tip of the iron core, and a permanent magnet is disposed in the step portion of the iron core. It is characterized in that armatures are provided on both sides of the yoke, facing the magnetic pole surfaces of both end faces of the yoke.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.
FIG. 1 shows a perspective view of the polar electromagnet section, and first, the polar electromagnet section, which is the gist of the present invention, will be explained. The polar electromagnet shown in FIG. 1 is of a so-called latching stable type.

A yoke 1 forming a magnetic path is formed into a flat plate and substantially U-shaped, and a bent portion 2 recessed downward is formed in the center of the central piece 1a. The tips of both side pieces 1b, 1b of the yoke 1 laid flat are bent inward and facing each other, and the tips are formed with downwardly bent hanging pieces 1c, 1c, respectively. As shown in FIG. 1, the base end of the iron core 19, around which the coil 7 is wound, is located on the lower surface of the bent part 2 of the yoke 1, and the iron core 19 and the yoke 1 are welded or It is fixed by caulking. On the other hand, the tip of the iron core 19 is bent downward to form a step 20 recessed downward. Then, the iron core 1 in which the stepped portion 20 is formed
The tip end of 9 is located between the hanging pieces 1c, 1c of the yoke 1. A permanent magnet 22 is arranged above the stepped portion 20 of the iron core 19, and an armature 17 is provided on both sides of the permanent magnet 22, and the permanent magnet 22 and the armature 17 are integrally constructed. It has been done. The outer surface of the armature 17 and the outer surface of the hanging piece 1c of the yoke 1 face each other. Also, yoke 1
The upper surface and the upper surface of the permanent magnet 22 are substantially flush with each other, so that the permanent magnet 22 does not protrude above the yoke 1.

Next, the operation will be explained. 1 and 2, FIG. 1 shows a non-excited state, and the permanent magnet 22
The armature 17 on the N pole side is the vertical piece 1c of the yoke 1.
Furthermore, the iron core 19 and the right armature 17 are each attracted. Here, when the coil 7 is excited, the permanent magnet 22 and the armature 17 move to the right as shown by the arrow, as shown in FIG. That is, as shown in the figure, since the iron core 19 is magnetized to the S pole and the vertical piece 1c of the yoke 1 is magnetized to the N pole, the right armature 1
7 and the hanging piece 1c of the yoke 1, the left armature 1
7 and the iron core 19, and repulsive forces act between the left armature 17 and the hanging piece 1c, and between the iron core 19 and the right hanging piece 1c. , the permanent magnet 22 and the armature 17 are attracted to the right vertical piece 1c and moved to the right. The relay shown here is of the so-called landing stable type, and even if the current to the coil 7 is cut off, the contact state is maintained, and the relay is energized again by reversing the current direction of the coil 7. Therefore, iron core 1
9 is reversed by changing the magnetization pole.

FIG. 3 shows a so-called single stable type, in which the hanging piece 1c of the yoke 1 facing the armature 17 is provided only on one side. In other words, the right side hanging piece is eliminated and the left side hanging piece 1c is replaced.
The attraction force between both armatures 17, 17 and the yoke 1 is unbalanced. Therefore, in the non-excited state shown in FIG. 3, the attractive force with the armature 17 on the side where the vertical piece 1c is formed is greater than on the side with no vertical piece, so the armature 17 on the left side is attracted to the vertical piece 1c and maintains that state. When the coil 7 is excited, as shown in FIG. 4, attractive and repulsive forces act on each member in the same way as in FIG. 2, and the permanent magnet 22 and the armature 17
is attracted and moves to the right as shown by the arrow in FIG. When the power to the coil 7 is cut off, the vertical piece 1c and the left armature 1 are removed from the side of the yoke 1 where there is no vertical piece.
Since the attractive force with 7 is greater, the permanent magnet 22 and the armature 17 return to their original positions.

In this way, since the structure is such that the permanent magnet 22 is arranged on the stepped portion 20 of the iron core 19, and the permanent magnet 22 is not arranged above the iron core 19, it is possible to realize a reduction in size and thickness. Furthermore, when the coil 7 is energized, attractive force and repulsive force are exerted by four gaps as shown in FIGS. 2 and 4, so that energy can be used efficiently and high sensitivity can be achieved.

FIG. 5 shows an exploded perspective view of a relay block using a latching stable type polar electromagnet section of this embodiment, and FIG. 6 shows a perspective view of the relay block. The relay block will be explained with the help of a diagram.

Coil block 3 located below the electromagnet part
consists of a coil frame 6 and terminal parts 4 and 5 integrally formed on both sides of the coil frame 6, an iron core 19 is inserted into the coil frame 6, and a coil 7 is wound around the outer periphery of the coil frame 6. It is passed around. The base end of the iron core 19 is the first
As shown in the figure, the iron core 19 is located on the lower surface of the bent portion 2 of the yoke 1, and the iron core 19 and the yoke 1 are fixed by welding or caulking. On the other hand, the tip of the iron core 19 is bent downward to form a step 20 recessed downward. Then, the iron core 1 in which the stepped portion 20 is formed
The tip end of 9 is located between the hanging pieces 1c, 1c of the yoke 1.

A platform-shaped protrusion 13 on which the tip of the iron core 19 rests is integrally protruded from the center of one terminal portion 4 of the coil block 3, and a pair of protrusions 8 are provided at a predetermined interval on both sides. , 8 are integrally formed. These one set of protrusions 8, 8 have contact terminals 9, 10, 1
1 and 12 are each integrally molded and disposed. The upper portions of the pair of contact terminals 9, 10, 11, 12 are located inside the protrusions 8, 8 and face each other, and the lower portions are vertically provided from the lower surface of the terminal portion 4. Common terminals 14 are integrally molded on both sides of the other terminal portion 5, and a coil terminal 15 connected to the coil 7 is integrally molded in the center portion. Both terminal parts 4,
Between the ends of the terminal parts 4 and 5, where the protrusions 8 and 8 of 5 and the common terminal 14 are provided, there is a space 21 with open upper and lower surfaces and sides; A contact spring 18 having conductivity and elasticity is provided between the parts.
is crosslinked. That is, the base of the contact spring 18 is fixed to the upper connection piece 14a of the common terminal 14 by welding or the like, and the tip of the contact spring 18, which is bifurcated, is located between the contact terminals 9, 10, 11, and 12. It is in contact with one of the contact terminals 9, 11, 10, 12. Further, this contact spring 18 is located below the side piece 1b of the yoke 1 and above the cavity 21 whose lower surface is open.

The card block 16, which is composed of a card 16a, a permanent magnet 22, an armature 17, etc., is constructed as follows. That is, a mounting piece 16b is placed horizontally at approximately the center of the surface of the terminal portion 4 of the card 16a that presses against the inner surface of the contact spring 18 to drive the contacts.
are integrally molded, and a pair of armatures 17,
17 is integrally molded and attached to the card 16a. The permanent magnet 22 is press-fitted between the armatures 17 and 17, and is located on the upper surface of the mounting piece 16b. The outer surfaces of the armatures 17, 17, which serve as magnetic pole surfaces, are arranged to face the inner surfaces of the vertical pieces 1c, 1c of the yoke 1.

Thus, the coil block 3 is provided with an iron core 19, and as shown in FIG. 6, the permanent magnet 22 of the card block 16 is placed at or above the stepped portion 20 at the tip of the iron core 19. Armatures 17, 17 are located on both sides of the tip of the iron core 19. In addition, the base end of the iron core 19 is the center piece 1a of the yoke 1.
is fixed to the lower surface of the bent portion 2 as described above, and the hanging pieces 1c, 1c are located between the protrusion 13 and the protrusion 8. The central part of the card block 16 has an iron core 19
A notch is cut out for escape, and the cards 16a on both sides can be moved laterally between the outer surface of the collar 6a of the coil frame 6 and the end surface of the protrusion 8, 8 on the side of the coil frame 6. The card 16a is inserted into the tsuba 6a.
It will be guided by the outer surface of and the end surfaces of the protrusions 8, 8.

FIG. 7 shows the state in which the above-mentioned relay block is placed on the base 23 and covered with the cover 25. At both ends of the base 23, there are corresponding insertion holes 24 through which the respective terminals 9 are inserted. The terminals 9 of the relay block are inserted into the insertion holes 24, and a box-shaped cover 2 with an opening on the bottom is placed on top of the terminals 9 of the relay block.
We are trying to cover up 5.

Next, the operation of the relay will be briefly explained. FIG. 6 shows a non-excited state, in which the armature 17 on the N pole side of the permanent magnet 22 is attached to the vertical piece 1c of the yoke 1, and the iron core 1
9 and the right armature 17 are each attracted.
Therefore, the contact spring 18a is pressed against the card 16a, and the tip end of the contact spring 18a, which serves as a movable contact, contacts the upper inner surface of the contact terminal 12, which serves as a fixed contact. Since the other contact spring 18b is not pressed against the card 16a, its elastic return force causes the tip of the contact spring 18b to touch the contact terminal 10.
is in contact with the inner surface of the upper part of the Here, when the coil 7 is energized, the card block 16 moves to the right as shown by the arrow as shown in FIG. 2, thereby driving the contact spring 18b in reverse and switching the contacts.
At this time, the other contact spring 18a returns due to its elastic return force and switches the contact point. Even if the excitation of the coil 7 is cut off, the state is maintained as described above, and by excitation of the coil 7 in the opposite direction, the card block 16 is attracted in the opposite direction, and the contact spring 18a is driven in reverse to return to the initial state. Further, the contact spring 18b returns to its original state due to its elastic restoring force and switches the contact point.

[Effects of the invention] As described above, the present invention forms a downwardly concave bent part in the center piece of the approximately U-shaped yoke, and the proximal end of the iron core around which the coil is wound approximately in the center part. The above-mentioned yoke is attached to the lower surface of the bent part of the center piece, and at the same time, a step portion recessed downward is formed on the top surface of the tip of the iron core, and a permanent magnet is placed in the step portion of the iron core. Since armatures are provided on both sides of the magnet, facing the magnetic pole faces on both end faces of the yoke, the tip of the iron core By arranging the permanent magnets in the step portion recessed below the part, the permanent magnets are arranged in parallel with the iron core, which has the advantage of making the whole part smaller and thinner.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the electromagnet part of the embodiment of the present invention;
Figure 2 is an explanatory diagram of the operation when the same as the above is excited, Figure 3 is a perspective view of the electromagnet section when the same as the above is used as a single stable type, Figure 4 is an explanatory diagram of the operation when the same as the above is excited, and Figure 5 is the same as the above. FIG. 6 is an exploded perspective view of the same relay block, and FIG. 7 is an exploded perspective view of the entire relay. 1 is a yoke, 1a is a center piece, 1b is a side piece, 2 is a bent part, 7 is a coil, 17 is an armature, 20 is a stepped part, and 22 is a permanent magnet.

Claims (1)

[Scope of utility model registration request] A downwardly concave bent portion is formed in the center piece of the roughly U-shaped yoke, and the base end of the iron core, around which the coil is wound, is placed on the lower surface of the bent portion of the center piece of the yoke. At the same time, a step portion recessed downward is formed on the top surface of the tip of the iron core, and a permanent magnet is placed in the step portion of the iron core, and magnetic poles on both end surfaces of the yoke are placed on both sides of the permanent magnet. A polarized electromagnet structure with an armature facing the surface.