JPS5812414Y2 - electromagnet device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a small electromagnet device used in electromagnetic relays and the like.

In order to miniaturize electromagnetic devices used in electromagnetic relays, etc., a thin metal plate is bent into a U shape and the iron core and yoke are integrally formed. The cross-sectional area is small, which has the disadvantage that the magnetic pole surface for armature attraction formed by its end face is small.

In order to eliminate this drawback, conventionally, a ring-shaped magnetic pole piece made of a magnetic material is fitted to the end of the iron core to increase the magnetic pole surface.

However, since the distance between the U-shaped core and the yoke is inherently narrow, if the pole piece is attached to the core as described above, the part of the pole piece that is closer to the yoke than the core can be connected to the yoke. A magnetic circuit with low magnetic resistance is formed between the magnet and the magnet, and therefore a large amount of magnetic flux flows through the core-yoke-pole piece path, which has the disadvantage of reducing the attractive force of the armature. ing.

The same can be said of the case where the iron core and the yoke are made into a 71J body and are later constructed integrally.

The present invention aims to solve the above-mentioned difficulties by attaching the magnetic pole piece without interposing it between the iron core and the yoke, in view of the slanting point.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

FIG. 1 shows a car drift-off type electromagnetic relay 14 equipped with an electromagnetic device 12 according to the present invention.

First, to briefly explain the electromagnetic relay 14, the relay includes a fixed contact 16, movable contacts 18 and 20 arranged on both sides of the contact, and an armature 2 of the electromagnetic device 12.
a card 26 that is connected to the armature 22 and selectively brings either one of the movable contacts 18, 20 into contact with the fixed contact 16 as the armature 22 is moved by the operation of the electromagnetic device; and a leaf spring 28 held between the two.

The electromagnet device 12. Fixed contact 16 and movable contact 1
8.20 each separately formed insulating support member 3
Each terminal 42.44.46.48 is supported by 2, 34, 36.38 and protrudes from the lower end surface of each support member.
are connected to each other.

These support members include respective base portions 32', 34',
It is assembled by overlapping 36' and 38' so that they are on the same plane, and inserting and fastening the fastening member 50.

In addition, in the figure, 51 indicates a cover.

Next, the electromagnet device 12 will be explained in detail.

First, the support member 32 of the electromagnetic device has first and second
As shown in the figure, a base portion 32', a terminal support portion 56.56 into which the terminal 42.42 is inserted, an armature hole 59 for inserting the attracted portion 22' of the armature 22, and a a magnetic pole piece mounting part 62 having a magnetic pole piece storage part 60 provided at an upper position and for storing the magnetic pole piece 58;
It is shaped like a staircase.

A cylindrical spool 64 is integrally connected to the upper surface of the magnetic pole piece mounting portion 62, and a coil 66 is wound around the spool, and a metal plate is bent into a U-shape and connected to the inner hole 68 of the spool. An electromagnet is constructed by press-fitting an iron core 72 formed integrally with iron 70.

The yoke 70 is provided in parallel to one side of the coil 66 at a predetermined interval.

The magnetic pole piece housing part 60 is opened on the side surface of the magnetic pole piece mounting part 62 on the yoke side together with the armature hole 59, and the magnetic pole piece housing part 60 is communicated with the inner hole 68 of the spool.

The magnetic pole piece 58 is inserted into the deep part of the magnetic pole piece housing 60 from the opening on the yoke side, and is inserted into the lower end 72' of the iron core 72.
extends into the storage portion 60 from the inner hole 68 of the spool 64 and is adapted to engage with the magnetic pole piece 58 inserted deeper into the lower end 72'. The magnetic pole piece 58 is not interposed between the lower end portion 72' and the yoke 70.

In the embodiment shown in FIG.
．． Press-fit parts 84 and 86, which are thinner than other parts, are protrudingly provided in 82, and are located between the armature hole 59 and the magnetic pole piece housing part 60, and protrude from the inner surfaces of both side walls of the magnetic pole piece mounting part 62 so as to face each other. A plate-shaped locking protrusion 90.92 is provided at a distance from the top surface of the pole piece storage portion 60 at a distance approximately equal to the thickness of the press-fit portion 84.86 of the magnetic pole piece 58. The locking protrusions 90 and 92 are inserted into the pole piece housing part 60 while being press-fitted between them and the top surface of the pole piece housing part 60, and then the iron core 72 is inserted into the inner hole 68 of the spool 64. A notch 98 provided in the lower end 72' is fitted with the intermediate protrusion 100 of the pole piece 58, and
Both side portions of the notch are sandwiched between the side portion 80 and the intermediate protrusion 100 of the magnetic pole piece 58 and between the side portion 82 and the intermediate protrusion 100.

In this case, as is clear from the above description, the magnetic pole piece 58
The central protrusion 100 and both side portions 80, 82 are prevented from protruding from the surface of the iron core 72 on the yoke 70 side toward the yoke.

As shown in FIG. 1, the inner part (that is, the right end part) of the magnetic pole piece storage part 60 is closed by a wall 104, and the magnetic pole piece 58 is held between the wall and the iron core 72, and the magnetic pole piece 58 is held between the wall and the iron core 72. Although the installation is ensured, it is not necessarily necessary to provide the wall 104 if the connection between the iron core and the magnetic pole piece is made strong.

FIG. 3 shows another embodiment of the pole piece.

The pole piece 58 is similar to that shown in FIG.
8, and press-fit portions 84' and 86' on both sides. There are no portions 82.82 provided for this purpose.

The installation of the pole piece 58' is similar to that of FIG.

The armature 22 is formed by bending a metal plate into a substantially L-shape, and its installation is done by abutting the inner edge 110' of the bent portion 110 of the armature against the lower edge 112 of the yoke 70, and Both side edges 114.114 of the yoke 70
The lower portion 120 of the substantially T-shaped presser spring 118 that is locked by the locking claws 116, 116 provided on the
0, and by pressing the bent portion 110 against the lower edge 112 of the yoke 70 with the bent tip 124 of the lower portion 120, it can pivot about the edge. It is installed so that

Attracted portion 2 below the bent portion 110 of the armature 22
2' is inserted into the armature hole 59 of the support member 32 so as to face the magnetic pole surface formed by the aforementioned iron core 72 and the lower end surface of the magnetic pole piece 58.

Therefore, when the electromagnet device is activated, the attracted part 22'
is attracted to the magnetic pole surface, and as a result, the armature is rotated counterclockwise in the figure around the lower edge 112 of the yoke 70, and the card 26 is accordingly moved to the left, causing the fixed contact 16 to rotate. On the other hand, from the illustrated state where the left movable contact 18 is in contact, the movable contact 18 is released and the other movable contact 20 comes into contact.

Note that a pair of holes 1 are provided in the upper extending portion of the armature 22.
28 and 128 are for inserting and supporting one end of the card 26 described above, and a pair of holes 130 and 130 provided in the pressing spring 118 are for locking the pressing spring to the yoke 70. It is designed to fit into the locking claws 116, 116 of the yoke.

Further, a pair of circular holes 132, 132 provided in the support member 32
indicates a hole through which the aforementioned fastening member 50 is inserted.

As shown above, in the electromagnet device according to the present invention, the magnetic pole piece 58 or 58' to be attached to the iron core is housed in the housing part 60 provided at one end of the spool 64 around which the coil is wound, and the magnetic pole piece 58 or 58' is housed in the housing part 60 provided at one end of the spool 64 around which the coil is wound. Since the end of the iron core inserted in 68 is extended closer to the yoke than the magnetic pole piece and engaged with the magnetic pole piece, there is no need to interpose the magnetic pole piece between the iron core and the yoke. Therefore, in the conventional method in which a ring-shaped magnetic pole piece is fitted onto the iron core to form a magnetic pole surface, a part of the magnetic pole piece is interposed between the iron core and the yoke. A magnetic circuit with low magnetic resistance is formed between the two, which solves the problem of lowering the armature's attractive force.

[Brief explanation of drawings]

Fig. 1 is a side view of a car drift-off type electromagnetic relay to which the electromagnet device according to the present invention is attached; Fig. 2 is an exploded perspective view of the electromagnet device shown in Fig. 1; Fig. 3 is shown in Fig. 2. FIG. 4 is a perspective view showing another embodiment of a magnetic pole piece attached to an electromagnetic device. 22... Armature; 32... Support member; 58... Magnetic pole piece; 60... Magnetic pole piece housing; 64... Spool; 66...
・Coil; 68...Inner hole; 70...Yoke; 72...Iron core.

Claims (3)

[Scope of utility model registration request] (1) An iron core; a yoke running parallel to this; a spool having an inner hole for accommodating the iron core; a coil wound around the spool; an armature; engaged with the iron core for armature suction. In the electromagnet device, a magnetic pole piece is provided at one end of the spool, and the magnetic pole piece is stored in the housing part, and the end of the iron core stored in the inner hole of the spool is set. An electromagnet device, characterized in that a portion extends into the magnetic pole piece storage portion and is engaged with the magnetic pole piece in a state where the magnetic pole piece is not on the yoke side of the end of the iron core. (2) Scope of Utility Model Registration In the electromagnetic device according to claim 1, the storage section has an opening facing the yoke, and the magnetic pole pieces are inserted into the deep part of the storage section through the opening. An electromagnet device characterized in that an end portion of the iron core extends into the storage portion and engages with a magnetic pole piece located deeper than the end portion. (3) Scope of Utility Model Registration In the electromagnet device according to claim 1 or 2, the magnetic pole piece and the end of the iron core are provided with corrugations complementary to each other, and the grooves are engaged with the magnetic pole piece. An electromagnet device characterized by engaging an end portion of an iron core.