JPH0573840U - Display button drive structure of earth leakage breaker - Google Patents

Abstract

(57) [Abstract] [Purpose] An object is to provide a display button driving structure of an earth leakage breaker that drives a plunger of a magnet coil body and a display button by a single coil spring. A pitch winding torsion coil spring 20 is inserted into a plunger 18 of a magnet coil body 14 which is excited when an electric leakage occurs, and one end of the pitch winding torsion coil spring 20 is connected to the plunger 18 for earth leakage tripping. While being locked to the plate 24, the other end of the pitch winding torsion spring 20 is locked to a display button body 34 arranged so as to be movable back and forth in a direction intersecting with the moving direction of the plunger 18. The engagement between the earth leakage trip plate 24 and the display button body 34 is released by the excitation of the magnet coil body 14, and the display button body 34 is driven by the twisting force of the pitch winding torsion spring 20 inserted into the plunger 18.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 In the present invention, when a leakage occurs, the leakage trip device is driven by the exciting force of the leakage trip electromagnetic coil, and the leakage indicator button is projected from the indicator button hole provided on the body cover of the leakage breaker to cause leakage. The present invention relates to a display button drive structure of an earth leakage breaker, which is a mechanism for notifying the user of the fact.

[0002]

[Prior Art]

 Conventionally, for example, as a display button driving structure of this type of earth leakage breaker, a structure as shown in FIGS. 3 and 4 is known. In the structure shown in FIGS. 3 and 4, the magnet coil body 54 mounted between the front plate 50 and the rear plate 52 is attached to the U-shaped magnet frame 56, and the coil spring 60 is inserted into the plunger 58. Then, the magnet coil body 54 is inserted so as to move back and forth. Then, the earth leakage trip plate 62 is anchored to the neck portion of the plunger 58, and the rear bent piece 62b of the earth leakage trip plate 62 is loosely inserted into the notch opening 64 of the front plate 50 from the lower side of the frame 56. Therefore, the plunger 58 is also held so as to be movable back and forth in association with the movement of the plunger 58.

On the other hand, a display button body 70 in which an earth leakage display button 66 is integrally provided on the upper edge of a mounting plate 68 is provided between the front plate 56 a of the frame 56 and the front plate 50 of the magnet coil body 54. The coil spring 74 is slidably inserted in between, and one end of the coil spring 74 is anchored to the projection 72 provided on the mounting plate 68 of the display button body 70, and the other end of the coil spring 74 is on the front plate 56a of the frame 56. It is moored to the protrusion 76 provided in the.

At the lower end of the mounting plate 68, there is provided an engaging stepped portion 80 that can be inserted into a notch 78 provided in the rear bent piece 62 b of the earth leakage trip member 62, and pushes down the display button body 70. By passing the engaging stepped portion 80 through the cutout portion 78, the plunger 58 is advanced by the tension biasing force of the coil spring 60, and in conjunction with this, the earth leakage trip plate 62 is advanced to advance the engagement. The step portion 80 is set in a state of abutting against the lower surface of the rear bent piece 62b of the earth leakage trip plate 62 against the tensile urging force of the coil spring 74.

In the state in which the leakage trip device is set in this way, if leakage occurs now, the magnet coil body 54 is excited and the plunger 58 resists the pulling force of the coil spring 60. It is attracted to the magnet coil body 54, and at that time, the earth leakage trip plate 62 also moves rearward together.

At that time, the engaging stepped portion 80 of the display button body 70 is allowed to pass through the cutout portion 78 provided in the rear bent piece 62b of the earth leakage trip plate 62, and the display button body 70 and The engagement with the earth leakage trip plate 62 is released, and the pulling force of the coil spring 74 causes the display button body 70 to slide upward. As a result, the leakage display button 66 is projected from a display button hole provided in the body cover of the leakage breaker (not shown) to indicate that leakage has occurred.

[0007]

[Problems to be solved by the device]

 However, according to the display button drive structure configured as described above, two coil springs, that is, the coil spring 60 for the plunger 58 of the magnet coil body 54 and the coil spring 74 for the earth leakage display button 66 are required. ..

Therefore, when assembling this earth leakage breaker, one end of the coil spring 74 for the earth leakage display button is anchored to the protrusion 72 of the display button body 70 and the other end is anchored to the protrusion 76 of the frame 56. Therefore, the assembling work was very troublesome and time-consuming.

Further, a space for assembling the two coil springs 60, 74 on the front surface of the magnet coil body 54 is required, which requires a coil space, which prevents the structure from becoming compact. ..

The present invention has been made to solve the above-mentioned problems, and an object thereof is to drive a plunger of a magnet coil body and a display button body with a single coil spring. The purpose is to provide a display button drive structure for an earth leakage circuit breaker that is designed to operate. As a result, the work of assembling this earth leakage breaker will be simplified and made more compact.

[0011]

[Means for Solving the Problems]

 In order to achieve this object, the display button drive structure of the earth leakage circuit breaker according to the present invention is such that a pitch winding twist spring is inserted into the plunger of the magnet coil body that is excited when earth leakage occurs, One end of the torsion spring is locked to the magnet trip plate anchored to the plunger, and the other end of the pitch winding torsion spring is arranged so as to be movable back and forth in a direction crossing the moving direction of the plunger. It is locked to the display button body.

[0012]

[Action]

 According to the display button drive structure of the earth leakage breaker according to the present invention having the above structure, when the earth leakage occurs, the magnet coil body is excited and the plunger resists the tension urging force of the pitch winding torsion spring. Be attracted. Then, the magnet trip plate is driven following the movement of the plunger, and the engagement between the display button body and the magnet trip plate is released. At that time, the display button body is moved in a direction intersecting the forward / backward movement direction of the plunger by the twisting force of the pitch winding twisting spring.

[0013]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an assembled state view of a display button driving structure of an earth leakage breaker according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof.

As shown in the figure, in this earth leakage breaker, a magnet coil body 14 mounted between a front plate 10 and a rear plate 12 is mounted on a lateral U-shaped frame 16. A pitch winding torsion spring 20 is inserted through a plunger 18 which is inserted into and retracted from the front end 14 of the frame 14, and the plunger 18 includes an upper edge recess 16b provided on a front plate 16a of the frame 16 and the front plate. It is attached to the magnet coil body 14 through a plunger insertion opening 22 formed in 10.

A notch 26 provided in the front plate 24 a of the L-shaped earth leakage trip plate 24 is moored to the neck of the plunger 18, and the rear bent piece 24 b of the earth leakage trip plate 24 is attached to the front portion. It is inserted and retained in a through hole 28 provided in the plate 10 so as to be movable back and forth.

On the other hand, a display button body 34 integrally provided with the earth leakage display button 30 on the upper end edge of the mounting plate 32 is provided between the front plate 16 a with the frame 16 and the plate 10 of the magnet coil body 14. It is inserted so as to be slidable vertically. Further, at the lower end of the mounting plate 32 of the above-mentioned display button body 34, an engaging step which can be inserted into the notch 36 provided in the bottom plate piece 24c extending rearward from the front plate 24a of the earth leakage trip plate 24. A section 38 is provided.

Thus, one end 20a of the pitch winding torsion spring 20 inserted through the plunger 18 is locked to the upper edge of the front plate 24a of the earth leakage trip plate 24, and the other end 20b of the pitch winding torsion spring 20 is The display button body 34 is anchored by being inserted into a pin hole 40 provided at one side edge of the mounting plate 32.

According to the display button drive structure having such a configuration, the display button body 34 is pushed down and the engaging step portion 38 provided on the lower end edge of the mounting plate 32 is attached to the bottom plate of the earth leakage trip plate 24. When the plunger 18 is passed through the notch 36 provided in the piece 24c, the plunger 18 is moved forward by the pulling biasing force of the pitch winding torsion spring 20, and the earth leakage trip plate 24 is moved forward in conjunction therewith.

As a result, the leakage trip mechanism is set in a state where the engagement step portion 38 is in contact with the lower surface of the bottom plate piece 24c of the leakage trip plate 24 against the twisting force of the pitch winding spring 20. To be done.

On the other hand, if leakage occurs in this set state, the magnet coil body 14 is excited and the plunger 18 is attracted to the magnet coil body 14 against the tensile force of the pitch winding torsion coil spring 20. Following the above, the earth leakage trip plate 24 also moves backward together.

At that time, a state in which the engagement step portion 38 of the display button body 34 can pass through the notch portion 36 provided in the bottom plate piece 24c of the earth leakage trip plate 24 is obtained, and the pitch winding torsion spring 20 The display button body 34 slides upward due to the twisting force, and the earth leakage display button 30 projects from the display button hole provided in the body cover of this earth leakage breaker (not shown). As a result, it is displayed that the leakage has occurred.

As described above, the pitch winding torsion coil spring 20 not only pulls and urges the plunger 18 inserted into the magnet coil body 14, but also moves the display button body 34 into the pitch winding torsion spring. Twisting force of 20 also pushes upward and biases. That is, one pitch winding torsion spring 20 provides a synergistic relationship between the drive of the plunger 18 inserted into the magnet coil body 14 and the drive of the display button body 34.

[0023]

[Effect of the device]

 As is apparent from the above description, according to the display button drive structure of the earth leakage breaker according to the present invention, one coil spring is used both for driving the plunger of the magnet coil body and for driving the display button body. Since this is done, the number of parts can be reduced and the parts management can be simplified. In the assembling work of this structure, one end of the coil spring inserted in the plunger of the magnet coil body is anchored to the trip plate, and the other end is anchored to the display button. In addition, it contributes to the efficiency of the assembling work, and also contributes to the reduction of the manufacturing cost together with the reduction of the number of parts mentioned above.

[Brief description of drawings]

FIG. 1 is an external perspective view of a display button drive structure according to an embodiment when the present invention is applied to an earth leakage breaker.

FIG. 2 is an exploded perspective view of the display button driving structure shown in FIG.

FIG. 3 is an external perspective view of a display button drive structure as a conventional example.

FIG. 4 is an exploded perspective view of the display button drive structure shown in FIG.

[Explanation of symbols]

 14 magnet coil body 18 plunger 20 pitch winding torsion spring 24 earth leakage trip plate 30 earth leakage display button 34 display button body

Claims (1)

[Scope of utility model registration request] 1. A pitch winding torsion spring is inserted into and attached to a plunger of a magnet coil body which is excited when an electric leakage occurs, and one end of the pitch winding torsion spring is locked to a trip plate moored to the plunger. The display button driving structure of the earth leakage breaker, characterized in that the other end of the pitch winding torsion spring is engaged with a display button body arranged so as to be movable back and forth in a direction intersecting with a moving direction of the plunger. ..