JPH0221523A - Release type electromagnetic tripping device - Google Patents

Abstract

PURPOSE:To make it possible to reset a plunger automatically with the mechanism of the device itself as well as to realize a compact size of the device by making the force of the plunger amplified with a latch, an actuator and a trip spring. CONSTITUTION:When a plunger 8a is released, a latch 13 is rotated counterclockwise against a latch spring 15, a pawel 13a is removed from an actuator 10, and the actuator 10 is projected by a trip spring 12. In this case, the circuit breaker is tripped by rotating a trip bar, for example. When the actuator 10 is projected by the trip spring 12 in such a way, a reset spring 16 is also moved to press in and reset the plunger 8a. By amplifying the force of the plunger 8a is such a way, the plunger 8a can be reset by the mechanism of the device itself automatically as well as a small size of the device can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a release type electromagnetic tripping device, and particularly to a release type electromagnetic bow removal device used as a tripping device for a circuit breaker.

[Prior Art] FIG. 8 is a side view showing a conventional release type electromagnetic tripping device disclosed in, for example, Japanese Patent Publication No. 49-34424.
In the illustrated example, it is installed inside the case (1) of the circuit breaker. If an overcurrent flows through the circuit breaker, the electromagnetic disconnect device (
When the plunger (3) of step 2) is released, the spring (4) causes the plunger (3) to protrude and rotate the trip bar (5), thereby tripping the circuit breaker. At this time, the member (6) is pushed up by the opening/closing mechanism (not shown) of the circuit breaker, and the reset bar (7) is rotated in the direction of the arrow.
The plunger (3) is reset against the spring (4).

[Problems to be Solved by the Invention] In the conventional release type magnetic tripping device as described above, the force of the plunger (3) is directly transmitted to the trip bar (5) without being amplified. ) is large in size, and since the plunger (3) is reset by the member (6) of the circuit breaker, it becomes difficult to set the position depending on the combination of the circuit breakers, etc.

This invention was made to solve these problems, and the device can be miniaturized by amplifying the plunger force, and the plunger can be automatically reset by its own mechanism. The purpose is to obtain.

[Means for Solving the Problems] A release type magnetic tripping device according to the present invention includes a release type electromagnetic device, a frame attached to the release type electromagnetic device,
an actuator that is attached to the frame and moves between a standby position and an extended position; a trip spring that biases the actuator in the direction of the extended position; a latch that engages with the actuator and whose other end engages with the unreleased plunger of the release type electromagnetic device; a latch spring that biases the latch to a position where it engages with the actuator; and a reset spring that pushes the plunger from the release position to reset the plunger when the actuator protrudes.

[Effect]

In this invention, when the plunger is released, the latch rotates against the latch spring and disengages from the actuator, and the actuator is projected by the trip spring, so that the plunger force is amplified by the latch, the actuator, and the trip spring. Furthermore, since the plunger is reset by being pushed in by the reset spring at the same time as the actuator protrudes, the plunger can be reset by itself.

[Embodiment of the Invention] An embodiment of the invention will be described with reference to FIGS. 1 to 7. Figure 1 is a side view, Figure 2 is a bottom view, Figure 3 is a top view,
Figure 4 is a cross-sectional view taken along line IV-rl/ in Figure 3, Figure 5 is the same figure as Figure 4 showing the completed state with the exception of the latch, and Figure 6 is the same as Figure 4 showing the protruding state of the actuator. 7 are half-sectional side views of the release type electromagnetic device. In the figure, (
8) is a release type electromagnetic device, which includes a plunger (8a), a plunger spring (8b), an outer yoke (8c), and a front yoke (8).
8d), bobbin (8e), winding (8f), and permanent magnet (8
g) and a transfer yoke (8h). (9) is the outer yoke (8c) of the release type electromagnetic device (8)
The frame (10) is attached to the frame (9) with two grooves (lla).

The actuator is movably supported by (llb) and is positioned at the standby position shown in FIG. 4 and the protruding position shown in FIG. 6, respectively. (12) is a tripping spring that biases the actuator (10) in the direction of the protruding position, and (13) is a latch whose L-shaped middle part is rotatably supported on the frame (9) by a pin (14). , the claw portion (13a) at one end engages with the actuator (10) at the standby position, and the claw portion (13a) at the other end (13a) engages with the actuator (10) at the standby position.
3b) is set to engage the plunger (8a) before release. (15) is a latch spring that urges the latch (13) to a position where it engages with the actuator (10);
Reference numeral (16) denotes a reset spring provided on the actuator (lO), which is located at a position where when the actuator (10) projects, the plunger (8a) is pushed in from the release position to be reset.

Note that the tip (10a) of the actuator (10) functions as a stopper for the plunger (8a).

Next, the operation will be explained. Figures 1-4 and 7
In the state shown in the figure, the plunger (
8a) is not released, the latch (13) and the actuator (10) are held in engagement by the latch spring (15) and the trip spring (12), and the actuator (10) is set in the standby position. Ru. When the plunger (8a) is released, the latch (13) is rotated counterclockwise against the latch spring (15), and the claw (13a) engages the actuator (10) as shown in FIG.
deviate from The latch (13) is the actuator (10)
When the actuator (10) comes off the trip spring (
12) to protrude to the position shown in FIG. At this time, for example, the trip bar (5) in FIG. 8 is rotated to trip the circuit breaker. In this way, the actuator (
10) is projected by the tripping spring (12), the reset spring (16) also moves from the position shown in FIG. 5 to the position shown in FIG. 6 to push in and reset the plunger (8a).

To reset the entire device, push the actuator (10) against the tripping spring (12) and press the latch (13).
) is engaged by the latch spring (15).

As mentioned above, the force of the plunger (8a) is applied to the latch (13).
, actuator (10), and trip spring (12), the magnetic circuit can be made compact and highly sensitive.
Moreover, since the plunger (8a) is self-reset by the reset spring (16), there is no need to manually reset the plunger (8a), and since the reset spring (16) can absorb dimensional variations, the plunger (8a) can be reliably reset. Can be self-reset.

[Effect 1 of the Invention As described above, according to the present invention, the plunger force can be amplified, so the device can be made smaller, and the plunger can be automatically reset by the mechanism of the device itself.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the present invention, Fig. 2 is a bottom view, Fig. 3 is a top view, and Fig. 4 is a line TV-TV in Fig. 3.
Figure 5 is the same diagram as Figure 4 showing the latch completed and Figure 6 is the same diagram as Figure 4 showing the actuator in the protruding state.
The same figure as the figure, Figure 7 is a half-section side view of the release type electromagnetic device,
FIG. 8 is a side view showing a conventional device. In the figure, (8) is a release type electromagnetic device, (8a) is a plunger, (9) is a frame, (10) is an actuator, (12) is a tripping spring, (13) is a latch, and (15)
indicates a latch spring, and (16) indicates a reset spring. Note that the same reference numerals in the figures indicate the same or corresponding parts. Figure 1 Agent Masuo Oiwa, patent attorney Figure 3

Claims (1)

[Claims] (1) A release-type electromagnetic device, a frame attached to the release-type electromagnetic device, an actuator attached to the frame that moves between a standby position and an extended position, and an actuator that urges the actuator toward the extended position. a release spring, a latch rotatably supported by the frame and having one end engaged with the actuator in the standby position and the other end engaging the plunger of the release type electromagnetic device before release; a latch for engaging the latch with the actuator; a latch spring that urges the actuator to the mating position; and a reset spring that is provided on the actuator and pushes the plunger from the release position to reset it when the actuator projects, and when the plunger is released, the latch is pressed against the latch spring. The plunger is rotated against the pressure and removed from the actuator, and at the same time as the actuator is projected by the tripping spring, the plunger is pushed in and reset by the reset spring that moves together with the actuator. Release type electromagnetic trip device.