JPH0316264Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a polarized electromagnet device used in a polarized electromagnetic relay.

[Conventional technology]

Conventionally, as an electromagnet device for this type of polarized electromagnetic relay, an electromagnet device having a parallel movement structure as shown in FIG. 6 has been disclosed. (Utility Model Application Publication No. 59-171314) This electromagnet device has two movable cores 17a and 17c on the magnetic pole faces of a pair of permanent magnets 5a and 5b, respectively.
17b and 17d are attached to both ends of a connecting member 9 made of a non-magnetic material to constitute a movable block, and a magnetic pole made of a coil 3 wound around a rod-shaped fixed iron core 16 and a protruding piece. The structure is such that an electromagnet section consisting of a yoke 15 having a piece 18 is used as a fixed block, and the movable block is driven by exciting the coil 3.

[Problem that the invention attempts to solve]

When a polarized electromagnetic device with such a structure is used in a polarized electromagnetic relay, the movable block has a permanent magnet 5, a movable iron core 17, and a non-magnetic magnet (not shown in the drawing) to obtain the necessary magnetic resistance. Since the movable block itself is composed of a large number of parts, the total mass of the movable block itself becomes large. For this reason, when the electromagnetic relay is subjected to external forces such as vibrations or shocks, the moving block will follow very slowly.
It becomes very difficult to maintain good malfunction resistance characteristics against vibrations, shocks, etc. of the contact system interlocked with the movable block. In order to improve this malfunction resistance, the total mass of the moving block should be reduced, or
Alternatively, it is necessary to increase the holding power of the moving part by increasing the size of the permanent magnet, but in this type of structure, the permanent magnet is built into the moving block, so the permanent magnet cannot be used. If it is made larger, the total mass of the movable block will inevitably increase, and this increase in mass will further deteriorate the malfunction resistance, creating a vicious cycle.

Furthermore, when the movable block moves in the direction of arrow B in the state shown in FIG.
7a and 17b, and at the same time the movable cores 17c and 17d contact the surface of the fixed core 16.However, in reality, due to the size of the component parts, Due to variations, it is extremely rare for all of these armature surfaces to come into contact with each other; however, it is extremely rare for all of these armature surfaces to come into contact with each other. This has the disadvantage of increasing the loss of suction force and the variation.

[Means for solving problems]

In order to eliminate these drawbacks, the present invention disposes a permanent magnet in the fixed block part, and in order to reduce the mass of the movable block, transmits the motion of the movable block to the movable iron core and the spring system that contacts it. It consists of only connecting members.

[Function and Examples]

FIG. 1 is an exploded perspective view showing an embodiment in which the electromagnet device of the present invention is used in a polarized electromagnetic relay.
In the figure, 1 is a case, 2 is a coil bobbin, 3 is a coil, 4 is a movable iron core, 5a, 5b are permanent magnets, 6
a, 6c and 6b, 6d are L-shaped magnetic pole pieces, 7 is an end surface where L-shaped magnetic pole pieces 6a and 6b or 6c and 6d face each other, 7a and 7b are protrusions, 9 is a connecting member made of a non-magnetic material, and 10 is a connecting member made of a non-magnetic material. A movable spring, 11 a fixed contact terminal, and 12 a base.

2 and 3 are schematic perspective views for explaining the operation of the electromagnet device of the present invention, in which the coil 3 is in a non-excited state in FIG. 2, and in an energized state in FIG. be.

Hereinafter, the present invention will be explained in detail based on the drawings. When the coil 3 shown in FIG. Piece 6b → Movable iron core 4 → L-shaped magnetic pole piece 6a → Permanent magnet 5a → L-shaped magnetic pole piece 6c → Protrusion 7b → L-shaped magnetic pole piece 6d → In the magnetic circuit of permanent magnet 5b, the armature surfaces of L-shaped magnetic pole pieces 6a and 6b 13a and 13b
is maintained. Next, when the coil 3 is excited to generate a magnetic flux in the opposite direction to the magnetic flux Φ1, in the magnetic fluxes Φ2 and Φ3 generated by the coil 3, the magnetic flux Φ2 is as follows: movable iron core 4 → short space 1b → L-shaped magnetic pole piece 6d → protrusion 7b -> L-shaped magnetic pole piece 6c -> short space 1a -> constitutes a magnetic circuit of movable iron core 4, and generates an attraction effect on armature surfaces 13c and 13d,
In addition, the magnetic flux Φ3 changes from the movable iron core 4 to the L-shaped magnetic pole piece 6b to
The flow is from the protrusion 7a to the L-shaped pole piece 6a to the movable core 4, and a repulsion occurs on the armature surfaces 13a and 13b, causing the movable core 4 to move in parallel in the direction of arrow A, resulting in the state shown in FIG. As a result, the connecting member 9, which is fixed integrally with the movable core 4, is moved in parallel and transmitted to the contact spring system.

4 and 5 show other embodiments of the present invention, and FIG. 4 shows the protrusion 7b shown in FIG.
It is a schematic perspective view in which a wide gap 8 is provided in the part,
The air gap 8 allows a required predetermined magnetic resistance to be obtained during this period.

Figure 5 shows an L-shaped magnetic pole piece 6 with only one magnetic pole piece.
a and 6b, and a U-shaped magnetic pole piece 19 formed integrally with the other.

With this configuration, when moving in the direction of arrow A, a difference is caused in the attractive force characteristics, and it can be used as an electromagnet device of a polarized current holding type electromagnetic relay.

[Effect of idea]

According to the present invention having the above configuration, the following great effects are achieved.

(1) The movable block consists only of a movable iron core placed in the center between the magnetic pole pieces and a connecting member that drives the contact spring system that connects the contact circuit to the movable block, so the total mass of the movable block is This makes it possible to significantly reduce the amount of damage caused by the contact circuit driven by the movable block, and it is possible to very easily improve the malfunction resistance against vibration and impact of the contact circuit driven by the movable block.

(2) Since the movable core and the magnetic pole piece are in reliable contact with the two contact surfaces, it is possible to reduce the loss and variation in attractive force, and the assembly size variation can be reduced by combining relatively simple parts. Since it is possible to reduce the amount of noise, it is possible to increase the sensitivity and reduce the size of polarized relays.

(3) By providing a protrusion on the contact portion of the L-shaped magnetic pole piece, a predetermined magnetic resistance can be obtained extremely easily, so that means such as interposing a non-magnetic plate are not required, and the number of parts can be reduced.

(4) By enlarging or unifying the air gap between the facing surfaces of one magnetic pole piece, differences in the attractive force characteristics when the movable core moves in the relative direction are created, and the polarized current holding type electromagnetic relay is It can also be used as an electromagnetic device, and its range of applications is extremely wide.

(5) By providing the L-shaped magnetic pole piece, the magnetic flux generated in the movable core by the coil efficiently flows through the contact surface between the movable core and the L-shaped magnetic pole piece, and the contact surface between the movable core and the L-shaped magnetic pole piece is fixed by the permanent magnet. We can expect polarized electromagnetic relays to be even more sensitive than conventional ones because they can efficiently cancel out the magnetic flux flowing through them.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a polarized electromagnetic relay showing an embodiment of the present invention, and FIGS. 2 and 3 are schematic perspective views for explaining the operation of the polarized electromagnet device of the present invention, respectively. The coil is shown in a non-excited state and the coil is shown in an excited state. 4 and 5 are schematic perspective views of a polarized electromagnet device showing other embodiments of the present invention, and FIG. 6 is a schematic perspective view of a conventional polarized electromagnet device. 3 is a coil, 4 is a movable iron core, 5 is a permanent magnet, 6
1 is an L-shaped magnetic pole piece, 7 is a protrusion, 8 is a gap, 9 is a connecting member, and 10 is a movable spring.

Claims (1)

[Scope of utility model registration request] Both poles of a permanent magnet are held between the corners of two L-shaped magnetic pole pieces to form one set of permanent magnet assemblies, and the other permanent magnet assembly is set in opposite directions. , the ends of both magnetic pole pieces are brought into opposing contact, a protrusion or a gap is provided on the opposing contact surfaces to provide a predetermined magnetic resistance, and a movable core inserted into the hollow part of the coil is placed in the space of the permanent magnet assembly. A polarized electromagnet device characterized in that a connecting member for driving a contact spring system is attached to both ends of the movable core so that the movable core moves in parallel between the magnetic pole pieces.