JPH062189Y2 - Release type electromagnetic device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a release type electromagnetic device used for an earth leakage, a breaker, a breaker or the like.

[Conventional technology]

A conventional release type electromagnetic device of this type will be described with reference to FIGS. FIG. 5 is a perspective view, FIG. 6 is a partially cutaway top view of FIG. 5 seen from above, FIG. 7 is a rear view of FIG. 6 seen from above, and FIG. 8 is line VIII of FIG. It is a sectional view of -VIII. In the figure, (1) is a frame, (2) is a slider made of an insulating molded product that is held by the frame (1) by the pin (3), and can be moved along the pin (4) by the long hole (2a). It has become. (5) is frame (1) with pin (6)
With the release spring attached to the protrusion (2) of the slider (2)
b) and always move the slider (2) in the moving direction (arrow 7
Direction). (8) is an iron core fixed to the frame (1), (9) is a permanent magnet, (10) is a coil, (11)
Is a movable iron core, which is movably inserted into the coil (10) through the hole (8a) of the iron core (8). (12) is a movable plate fixed to the tip of the movable iron core (11), and the tip plate portion (12a) is in contact with the end surface (2c) of the slider (2). (13) is a torsion spring for returning the movable core inserted in the pin (6), one end of which is engaged with the movable plate (12) and the other end of which is engaged with the frame (1).

Next, the operation will be described. 5 to 8 all show the released state. Therefore, although not shown, the movable iron core (11) overcomes the release spring (5) and is always attracted to the permanent magnet (9). Then, when a current flows through the coil (10) due to the leakage signal, the magnetic force of the permanent magnet (9) disappears and the spring force of the release spring (5) acts. That is, the movable iron core (11) moves in the release direction, and at the same time, the slider (2) also moves in the direction of the arrow (7) via the movable plate (12), and the release in FIGS. It becomes a state.
The breaker is tripped by the movement of this slider (2).

[Problems to be solved by the invention]

Since the conventional release type electromagnetic device is constructed as described above, the distance between the center of the movable iron core (11) and the action point of the release spring (5) of the slider (2) is as shown in FIG. L) exists, and therefore the spring force of the release spring (5) causes the movable plate (12) to move.
When acting on the movable iron core (11) via the arrow (14)
Rotational moment acts as shown by. Since this rotational moment acts on the movable iron core (11), the movable iron core (11) that repeats release-adsorption (return) strongly slides against the end edge of the hole (8a) of the iron core (8), and the movable iron core (11). ), The outer peripheral surface is scratched, friction is increased, and the release-suction operation cannot be performed.

The present invention has been made to solve such a problem.By preventing the rotational moment due to the spring force of the release spring from acting on the movable iron core, external damage caused by the iron core of the movable iron core is eliminated and the inclination due to the rotation of the slider is eliminated. It is an object of the present invention to provide a release type electromagnetic device that can be moved normally by eliminating it and can obtain high reliability.

[Means for solving problems]

In the release type electromagnetic device according to the present invention, the intermediate piece is pivotally supported by the frame so that both end pieces rotate in the release direction. The movable member includes a character-shaped movable member, and an arcuate surface is formed on one end piece of the movable member. The arcuate surface is engaged at a position separated from the spring action point of the slider, and the other end piece is It is engaged with a movable iron core.

[Action]

In this device, Since the slider is moved together with the movable iron core by the spring force of the release spring via the character-shaped movable member, the spring force of the release spring is The character-shaped movable member directly acts on the center of the movable core, and no rotational moment acts on the movable core. Further, since the arcuate surface of the end piece of the movable member is engaged with the slider at a position away from the spring action point, the inclination due to the rotation of the slider disappears and the slider moves normally.

[Example of device]

An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view, FIG. 2 is a perspective view of a movable member, FIG. 3 is a perspective view of a movable iron core, and FIG. 4 is a back view similar to FIG. The reference numerals are given and the description is omitted. In the figure, (15) is a groove cut into the end of the movable iron core (11), and (16) is a groove (1
5) It is fixed to both holes (11a), (11a) of the movable iron core (11) by crimping with a head (16a) with a pin attached to the end of the movable iron core (11).
(17) is An intermediate piece (17a) is rotatably supported by a pin (6) and a tip of one end piece (17b) is inserted into a groove (15) of a movable iron core (11) by a character-shaped movable member. Pin (1
6) and has an arc surface (18) at the tip of the other end piece (17c). This circular arc surface (18) is a spring action point (line 1) on the end surface (2c) of the slider (2).
It is engaged by a line contact at a position (downward) farther outward than 9).

in this way When the slider (2) and the movable iron core (11) are connected to each other by the character-shaped movable member 17, the spring force of the release spring (5) is increased. Since the character-shaped movable member 17 directly acts on the center of the movable core (11), the rotational moment (direction of arrow 14) in FIG. 6 does not act on the movable core (11). Further, when the circular arc surface (18) of the end piece portion (17c) of the movable member (17) is positioned below the spring action point on the end surface (2c) of the slider (2), the arrow ( 20) The circular arc surface (18) receives the rotation of the slider (2) (in the direction of arrow 21) due to the spring force of the release spring (5), so that the slider (2) does not rotate and does not tilt, and the slider (2) does not move normally. To do.

[Effect of device]

As described above, according to the present invention, since the spring force of the release spring acts directly on the center of the movable core, the rotation moment due to the release spring does not act on the movable core, and the damage caused by the iron core of the movable core is eliminated and Since the circular arc surface receives the rotation of the slider, the inclination due to the rotation of the slider is eliminated, and the current flowing to release the movable iron core itself does not vary, which has the effect of achieving high reliability.

[Brief description of drawings]

1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a perspective view of a movable member, FIG. 3 is a perspective view of a movable iron core, FIG. 4 is the same rear view as FIG. 7, and FIG. Is a perspective view showing a conventional device,
FIG. 6 is a partially cutaway top view of FIG. 5 seen from above, FIG. 7 is a rear view of FIG. 6 seen from above, and FIG. 8 is a line of FIG.
It is a sectional view of VIII-VIII. In the figure, (1) is a frame, (2) is a slider, (5) is a release spring, (6) is a pin, (11) is a movable iron core, (13)
Is a torsion spring, (15) is a groove, (16) is a pin, (1
7) is a movable member, (17a) is an intermediate piece, (17b),
(17c) is one end portion, (18) is an arc surface, and (19) is a spring action point. The same reference numerals in each figure denote the same or corresponding parts.

Claims (4)

[Scope of utility model registration request] 1. A movable iron core, a slider that moves in the same direction as the releasing direction of the movable iron core, and a release spring that is engaged with the slider and constantly biases the movable iron core in the releasing direction. In a release type electromagnetic device in which the slider moves together with the movable iron core by the spring force of the release spring when the movable iron core is released, an intermediate piece is pivotally supported by a frame so that both end pieces rotate in a release direction. Ru The movable member includes a character-shaped movable member, and an arcuate surface is formed on one end piece of the movable member. The arcuate surface is engaged at a position separated from the spring action point of the slider, and the other end piece is A release type electromagnetic device, wherein the slider is moved together with the movable iron core via the movable member by the spring force of the release spring when the movable iron core is engaged with the movable iron core. 2. A groove is cut into the end of the movable core, a pin is attached to the end of the movable core so as to cross the groove, and the pin is engaged with the end piece of the movable member inserted in the groove. The release type electromagnetic device according to claim 1, wherein the utility model is registered. 3. A pin on the frame into which the release spring is inserted,
The electromagnetic release device according to claim 1, wherein the movable member is rotatably supported. 4. A twist spring for returning the movable iron core is inserted into a pin for pivotally supporting the movable member, and one end of the twist spring is engaged with one end piece of the movable member and the other end is engaged with the frame. The release type electromagnetic device according to claim 1 of the utility model registration claim.