JPS58140933A - Contactor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a permanent magnet driven contactor.

FIG. 1 is a longitudinal cross-sectional view of a conventional electromagnetic contactor, in which a fixed core 3 is built into the center of a lower case 2 attached to a pace 1, and an excitation coil 4 is wound around this fixed core 3. ing. An upper case 5 is attached to the upper part of the lower case 2, and a movable contact base 6 is housed in the upper case 5. A movable iron core 7 is supported at the lower part of the movable contact base 6 by a hinge pin 8. The movable contact base 6 is urged upward by a return spring 9, pressed against the inside of the upper case 5, and held in a slidable state.

At the upper end of the upper case 5, two fixed contacts 1o each having a fixed contact point in contact are screwed symmetrically as a pair.
A movable contact 11 is located at a position facing this pair of fixed contacts 10.
is arranged, and is set in such a manner that it is pressed under the window of the movable contact base 6 by a contact spring 12, and the contact installation portion is entirely covered with a protective cover 13.

By energizing the excitation coil 4 of this electromagnetic contactor, the fixed iron core 3 is magnetized and the movable iron core 7 is attracted to the movable contact base 6.
By pulling downward, the contact portions of the pair of fixed contacts 10 and the movable contact 11 are brought into pressure contact, and the pair of fixed contacts 1o
electrical continuity between the two. When the normal power to the excitation coil 4 is cut off, the repulsive force of the return spring 9 pushes the movable contact base 6 upward [7], returning it to its original state. In this type of electromagnetic contactor, it is necessary to energize the excitation coil 4 when the main contacts are conducting, which not only consumes energy, but also has the drawback of generating vibration and noise due to the pulsation of the attractive force caused by AC excitation. Ta.

The present invention has been made in view of the above-mentioned conventional circumstances, and
The object of the present invention is to provide a contactor which completely eliminates the drawbacks of the conventional method, reduces excitation loss during main contact conduction, and reduces vibration and noise.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a left half vertical cross-sectional view and a right half front view of the contactor of the present invention, FIG. 3 (A) is an enlarged front view of the main part of FIG. 2, and FIG. 3 (B) is a FIG. 3(A) and FIG. 3(H) show the non-magnetized state of the magnetization attraction mechanism of the present invention; figure(
C) is an enlarged front view of the main part showing the state at the time of magnetization in FIG. 3(A). As shown in FIG. 2, FIG. 3(A), and FIG. 3(B), the basic configuration of the present invention is that the yoke 14 is a pair of left and right yokes, which are integrated with a thin non-magnetic material 15 in between. Provided for.

Further, a center hole 16 is bored in the axial direction of the yoke 14 at a central position sandwiching the non-magnetic material 15.

The central hole 16 of the yoke 14 has a cylindrical shape, with both sides having a hole and the other both sides having a semicircular arc shape, and a magnetic pole N on the two sides.
, and a permanent magnet 17 formed therein is rotatably inserted and provided. Furthermore, a rotary shaft 18 is provided protruding from both axial ends of the cylindrical permanent magnet 17, and a nozzle 19 that can be operated from the outside is attached to one end. Thus, the integrated yoke 14 is inserted into the base 1 through a predetermined gap below the movable core 7a of the contactor, with the non-magnetic material 15 sandwiched in the middle.
Place it on top.

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

According to the present invention, the magnetic poles N and S of the permanent magnet 17 are
Fig. 3 (A) facing the non-magnetic material 15 on the joint surface of 4.
And in the case shown in FIG. 3(B), the end surface 14 of the yoke 14
No magnetic pole is generated in b, the permanent magnet movable core 7a separated by a predetermined gap is not attracted, and the permanent magnet movable core 7a is not attracted by the pressing force of the return spring 9 in the non-magnetized state shown in FIG. The movable contact base 6 is pushed upward along with the movable contact base 6, and the movable contact 11 is also pushed (-raised), and the pair of fixed contacts 10 become open-circuited.

Next, to close the contact, rotate the handle 19 by 90 degrees in the direction of the arrow 20 (which can be operated from the outside on one of the rotating shafts 18 of the cylindrical permanent magnet 17), as shown in Fig. 3 (C). When the magnetic poles N and S of the permanent magnet 17 are perpendicular to the submerged non-magnetic material 15, a secondary magnetic pole (
N) and (S) are generated, and the permanent magnet movable iron core 7a resists the pressing force of the return spring 9 and attracts the movable contact base 6 downward to the end face 14b of the descending yoke, and the contacts are joined and become a pair. The fixed contacts 10 are in a conductive state.

As described above, according to the present invention, the permanent magnet 17
By rotating the knob 19 by 90 degrees in the forward and reverse directions, there is an effect that the contacts can be opened or closed. or,
The rotating operation of the nozzle 19 of the permanent magnet 17 can also be performed remotely using, for example, another stepping motor. Further, according to the present invention, power is required only when rotating the permanent magnet 17, but no energy is required when the contacts are conducting, the loss is zero, there is no need to worry about temperature rise, etc. It has effects such as no suction, no pulsation of suction force, no noise, etc.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a conventional electromagnetic contactor, FIG. 2 is a left half vertical cross-sectional view and right half front view of the contactor of the present invention, and FIG. 3 (A) is a main view of FIG. Enlarged front view of the section, Figure 3 (B
) is a cross-sectional view taken along the toe-crest line in Fig. 3 (A),
FIG. 3(C) is an enlarged front view of the main part showing the state of magnetization in FIG. 3(A).

Claims (2)

[Claims] (1) A contactor in which a movable contact base equipped with a movable contact is engaged with a movable core using a hinge pin, and the movable core is moved up and down to make contact with and separate from a fixed contact placed opposite the movable contact. A contactor characterized in that a movable iron core is attracted by the attractive force of a permanent magnet. (2) The attraction of the movable iron core is provided by sandwiching and fixing a thin non-magnetic material between two yokes, and a cylindrical permanent magnet with chips on both sides is rotatably supported in the center hole. The contactor according to claim 1, characterized in that a magnetic pole is generated and eliminated on the end face of the yoke.