KR20030039216A - external rotary handle of circuit breaker - Google Patents

Abstract

PURPOSE: An external operating handle of a molded case circuit breaker is provided to prevent the scratch and damage of the handle by installing a handle protector on a lever of the external operating handle. CONSTITUTION: A handle protector(200) is made of a synthetic resins identical to a material of a handle of a molded case circuit breaker. A stopper(202) is provided on each side of the handle protector(200) and inserted into a handle inserting hole of a lever. Where the handle protector(200) is inserted into the handle inserting hole of the lever, the handle protector(200) is pushed from lower to upper of the handle inserting hole and the stopper(202) is inserted into an inner of the handle inserting hole. An operating unit(201) is provided on an inner of the handle protector(200) to perform an ON/OFF operation.

Description

External rotary handle of circuit breaker

The present invention relates to an external operation handle of a circuit breaker, and in more detail, a handle protector is further provided on the lever of the external operation handle to which the handle of the circuit breaker is fitted so as to prevent the handle of the circuit breaker from being scratched or damaged between operations. .

In general, a circuit breaker is an electrical device that serves to protect circuits and loads by automatically cutting off circuits in the event of an overload or short-circuit. The circuit breaker and the extinguishing device part in a cover and a case forming an enclosure, As trip device is installed, it operates to cut off the accident current.

Such a circuit breaker detects this in the breaker and automatically cuts off the current regardless of artificial opening and closing of the breaker when an abnormal current occurs. This is called a normal trip.

In Figure 1, looking at the external appearance of such a circuit breaker, the cover (1) and the case (2) basically forming an enclosure, and the handle (3) provided in the center of the cover for the operator to artificially turn on / off Consists of

Therefore, when the worker grasps the handle 3 and rotates it upwards (on direction), the internal power is turned on and energized. When the abnormal current is generated thereafter, the handle 3 automatically moves downward ( It turns off while lowering to the off direction), so it operates to cut off the power.

However, when such a circuit breaker is installed in the panel of the switchboard, it is not easy to operate it externally. For this purpose, the circuit breaker is screwed to the front part of the circuit breaker as shown in FIGS. It is further provided with an external operation handle for easily turning on / off the handle 3 of the circuit breaker by rotating the rotary knob from the outside.

4 is a rear view illustrating a conventional external operation handle, which is briefly described as follows.

Conventional external operation handle configuration is provided on the front of the rectangular casing (4) is rotated in the state gripped from the outside by a rotary handle (5) for operating the on / off breaker, and the rotary handle in the casing (4) and The latch 7 is coupled by the fastening screw 6 and rotates together as the user rotates the rotary knob 5 in one direction, the roller 8 provided at one side of the latch, and one side in the casing 4. And a pin 9 fixed to the pin 9 and one end rotatably fitted to the pin, and the other end slidably fitted to the roller 8 to rotate together with the rotation of the latch 7. It consists of a lever 10 formed with a handle insertion hole 101 so that the handle 3 of the breaker is fitted, and a spring 11 fitted around the pin 9 to apply an elastic force to the lever 10.

Here, the detailed configuration of the lever 10, when referring to Figure 5, the iron piece of the metal material is bent in the U-shape, the upper surface of the bent portion for guiding this in the roller 8 is fitted A guide 100 is formed and a lower surface has a structure in which a handle insertion hole 101 of a predetermined shape is formed so that the handle 3 of the circuit breaker can be fitted.

Then, the operation of these components is as follows.

If the worker installs by screwing the external operation handle on the front of the circuit breaker, the handle of the circuit breaker (3) is inserted into the handle insertion hole 101 of the lever 10 which is a component of the external operation handle. ) Is inserted into the combined state.

In this state, when the operator wants to turn on the handle 3 of the wiring breaker, the operator grasps the rotary knob 5 provided on the front of the casing 4 of the external operation handle and moves to the right (clockwise in the drawing). As it rotates, it is understood that the latch 7 coupled by the rotary knob 5 and the fastening screw in the casing 4 is also rotated together in the same direction.

Subsequently, when the latch 7 is rotated in the same direction (clockwise in the drawing) as described above, the latch 10 and the lever 10 connected by the roller 8 at one end are rotated together in the same direction. In more detail, in consideration of the fact that one end of the lever 10 is rotatably fitted to the pin 9 and the other end is slidably coupled to the latch by the roller 8, the latch 7 is provided. Is rotated clockwise in the drawing, the lever 10 rotates in the same direction with the latch 7 with the pin 9 as the central axis.

Therefore, when the lever 10 is rotated at a predetermined angle in the clockwise direction, the handle 3 of the circuit breaker inserted into the handle insertion hole 101 of the lever is also raised upward, so that the circuit breaker is operated in the on state. Will be.

On the other hand, when the operator wants to switch the wiring breaker to the off state again by operating the external operation handle, the operator grabs the rotary knob 5 of the external operation handle and rotates it to the left side (counterclockwise in the drawing). At this time, the lever 10 is momentarily rotated downward by the elastic force of the spring (11).

Accordingly, the handle 3 of the wiring breaker inserted into the handle insertion hole 101 of the lever 10 is also lowered, so that the wiring breaker is switched off.

However, in the configuration of the external operation handle as described above, since the lever, which is a component thereof, is usually made of steel, when the handle of the wiring breaker is continuously turned on / off in the handle insertion hole of the lever, the handle This scratching or breakage problem occurred.

As a result, when the handle is substantially worn or broken, the circuit breaker malfunctions, causing a serious safety accident.

The present invention has been made to solve the above-described problems, in the external operation handle mounted on top of the circuit breaker, corresponding to the inner shape of the handle insertion hole of the latch which is a component of the external operation handle, for wiring It is an object of the present invention to provide an external operation handle of a circuit breaker further comprising a handle protector formed of a synthetic resin mold to prevent scratches or breakage upon contact with the handle of the breaker.

1 is a perspective view showing a general shape of a circuit breaker

Figure 2 is a perspective view showing the general shape of the external operation handle

Figure 3 is a perspective view showing a state in which the external operation handle coupled to the circuit breaker

Figure 4 is a rear view showing the configuration of a conventional external operation handle

5 is an enlarged perspective view of the shape of the lever in FIG.

Figure 6 is a rear view showing the configuration of the external operation handle in accordance with the present invention

Figure 7 is an enlarged perspective view of the shape of the handle protector according to the present invention

8 is a side view and a rear view showing a state in which the handle guard according to the invention coupled to the lever

<Explanation of symbols for the main parts of the drawings>

3: handle 4: casing

5: rotary knob 7: latch

8: roller 9: pin

10: lever 11: spring

101: handle insertion hole 200: handle guard

201: jamming

According to the present invention for achieving the above object, a casing mounted on the front portion of the circuit breaker, a rotary handle provided on the front of the casing, a latch provided in the casing and rotated together when operating the rotary handle, A pin is fixed inside the casing, and one end is rotatably fitted to the pin, and the other end is slidably fitted to a roller provided at one side of the latch, and a handle insertion hole is inserted at the center to fit the handle of the breaker. A lever and a spring inserted into the pin to apply elastic force to the lever, wherein the handle inserting hole of the lever is further provided with a handle guard formed of a synthetic resin mold to insert the handle of the breaker through the handle inserting hole. In the state that the handle is not in direct contact with the lever due to the interference of the handle protector The external operating handle of a circuit breaker that is provided.

Hereinafter, the present invention will be described in more detail with reference to FIGS. 6 to 8.

6 is a rear view showing the configuration of the external operation handle according to the present invention, Figure 7 is a perspective view showing an enlarged shape of the handle protector according to the present invention, Figure 8 is a handle protector according to the present invention to the lever As a side view and a rear view showing the combined state, the description thereof will be omitted in the same configuration as the conventional components among the components of the present invention, but the numbers given in the related art will be given as they are.

Hereinafter, the present invention will be described in more detail. In the lever 10 which is a component of the external operation handle of the present invention, the handle insertion hole 101 of the lever into which the handle 3 of the breaker is fitted is formed in the inner shape thereof. Correspondingly, a handle guard 200 formed of a synthetic resin mold is further provided.

Here, the handle protector 200 is preferably formed of a synthetic resin material of the same series as the handle 3 of the circuit breaker so as to minimize scratches or breakage when contacting the handle 3 of the circuit breaker.

In addition, the locking projections 202 are formed at each side of the handle protector 200 to be inserted into and detached from the handle inserting hole 101 of the lever 10. As a result, the handle protector 200 is pushed to the lever 10. When mounted to the handle insertion hole 101 of the handle insertion hole 200 is pushed down from below the handle insertion hole, the locking projection 202 is fitted into the inside of the handle insertion hole 101, respectively.

Once the handle protector 200 is inserted into the handle insertion hole 101 of the lever 10 as described above, the handle protector 200 is easily separated from the handle insertion hole 101 by the locking protrusion 202. It is understandable that no deviation occurs.

Thus, when the handle protector 200 is coupled to the front of the circuit breaker in a state where the handle protector 200 is mounted inside the handle insertion hole 101 as described above, the handle 3 of the circuit breaker is disposed in the handle protector 200. It is protected in the fitted state, it is understood that the on / off operation is made in the state in which the handle 3 of the breaker is in contact with the operation unit 201 protruding inside the handle protector.

In this state, when the rotary knob 5 of the external operation handle is turned left and right to turn on / off the wiring breaker, the handle 3 of the wiring breaker contacts the handle protector 200 during the on / off operation. This prevents scratching or breakage by touching the lever directly.

The external operation handle of the circuit breaker of the present invention is protected so that the handle of the circuit breaker is not directly scratched or damaged by the lever when it is used. Therefore, even if the external operation handle is continuously used, the closed end of the circuit breaker is worn or broken. Is prevented.

Therefore, there is a very economical advantage to prevent the wiring breaker malfunction and safety accidents caused by the above, and to simply replace the handle protector fitted to the lever when used for a long time.

Claims (2)

A casing mounted on the front side of the circuit breaker, a rotary handle provided on the front of the casing, a latch provided inside the casing to be rotated together when the rotary handle is operated, a pin fixed inside the casing, and one end of the casing A lever having a handle insertion hole so that the other end is slidably fitted to the pin and the other end is slidably fitted to the roller provided at one side of the latch, and the center part has a handle insertion hole for fitting the handle of the breaker, and the elastic force is applied to the lever. In consisting of a spring to add, The handle insertion hole of the lever is further provided with a handle protector formed of a synthetic resin mold so that the handle is not in direct contact with the lever due to the interference of the handle protector when the handle of the breaker is fitted through the handle inserting hole. External operation handle of wiring breaker. The method of claim 1, The handle protector is an external operation handle of the circuit breaker, characterized in that formed of a synthetic resin material of the same series as the handle of the circuit breaker.