KR100555363B1 - Locking apparatus of circuit breaker having trip location - Google Patents

Abstract

The present invention relates to a lock device of a circuit breaker having a trip position, and controls the position of an operation handle that is turned on (on) or off (off) by using a mechanism for a position of a trip state due to an abnormal current when an accident or an abnormal current flows in. Therefore, there is an effect that can know the trip state due to the abnormal current from the outside.

The lock device of the breaker having the trip position according to the present invention for this purpose is a rotary handle (8), the mechanism (2) of the breaker is installed under the handle (8), the side plate for supporting the parts of the mechanism (2) (6), a handle gear (10) rotatably provided on the side plate, a latch (16) and a latch holder (22) provided on the side plate (6), and a latch (16) and a gear for connecting the handle. A circuit breaker comprising a U-shaped pin 14 that interlocks (10), wherein the U-shaped pin stops at a tripping position between ON and OFF when the breaker trips. A protruding portion 32 having an embossed shape for blocking 14 is formed on the side plate 6.

Description

LOCKING APPARATUS OF CIRCUIT BREAKER HAVING TRIP LOCATION}

1 is a perspective view showing a handle driving device in a blocked state of a circuit breaker according to the prior art;

Figure 2 is a perspective view of the handle driving device in a tripped state of the circuit breaker of Figure 1

3 is a perspective view showing the latch stopper and the state of the latch shown in FIG.

Figure 4 is a perspective view of the handle driving device in the closing state of the breaker according to the present invention

5 is a perspective view showing a handle driving device in a tripped state of the circuit breaker of FIG.

FIG. 6 is a perspective view illustrating a handle driving device in a reset or shut down state of FIG. 4; FIG.

7 is an explanatory diagram for explaining the correlation between the protruding portion 32 and the U-shaped pin 14 according to the present invention.

Explanation of symbols on the main parts of the drawings

2: mechanism 4: case

6: side plate 8: handle

10: gear for connecting handle 12: shaft

14 U-shaped pin 16 latch

18: upper locking part 20: lower part

22: latch holder 24: link

26: rotating plate 28: spring

30: protrusion 32: protrusion shape

The present invention relates to a lock of a circuit breaker, in particular, by controlling the position of the operation handle using a mechanism during a trip operation due to an abnormal current, so that the trip state of the circuit breaker having a trip position to know the trip state due to the abnormal current from the outside It relates to a locking device.

In general, a circuit breaker is an electrical device that protects property and human life by automatically cutting off a circuit using a detection device in the event of an electrical overload or a short circuit.

The circuit breaker is composed of a mechanism for driving a circuit breaker, a mechanism unit for detecting an overcurrent, a power supply side stand for connecting a power supply, a trip unit on a load side, a handle for driving an opening and closing mechanism, and a case and a cover surrounding such devices.

When the breaker is normally energized, the movable contact point and the fixed contact point of the contact part are connected to conduct current flowing into the power supply terminal to the load terminal, but when an overcurrent or a short circuit occurs, the trip unit detects this and drives the switching mechanism. The movable contact block is moved by the opening and closing mechanism so that the movable contact point is spaced apart from the fixed contact point of the fixed contact point to block current from flowing to the load side.

1 is a perspective view illustrating a handle driving device in a blocked state of a circuit breaker according to the prior art, and FIG. 2 is a perspective view illustrating a handle driving device in a tripped state of the circuit breaker of FIG. 1.

1 and 2, the mechanism 102 installed in the case of the circuit breaker is installed with a trip function and a blocking function.

The mechanism 102 is composed of a side plate 104, the side plate 104 is provided with a latch stopper 106 having a locking function, the latch stopper inclined surface 108 and the latch stopper engaging the upper end of the latch stopper 106 A latch stopper protrusion 112 is formed which together form the surface 110.

The latch holder 114 having a locking function is disposed at a position spaced apart from the upper end of the latch stopper 106 by a predetermined distance, and is rotatably installed on the side plate 104.

The latch holder 114 is provided with a bimetal (not shown) that provides an action force so that the locked state can be automatically released in the event of a short circuit or overload of the motor.

The bimetal provides an action force to the latch holder 114 in the event of a short circuit or overload of the motor.

On one side of the latch holder 114, a latch 116 for transmitting an action force is disposed to be movable on the side plate 104, wherein an upper end of the latch 116 is installed to be caught by the latch holder 114, and a latch 116 is located on the latch stopper 106.

The other end of the pin 118 that transmits the action force is coupled to the lower portion of the latch 116 installed as described above, and one end of the pin 118 is disposed on the rotating plate 120 that is movable on the side plate 104. Is coupled, the lower side of the rotating plate 120 is coupled to the fixed shaft 122 to be rotatable on the side plate (104).

In addition, one side of the rotating plate 120 is provided on the side plate 104 while the spring 124 for providing an acting force is coupled to one end of the tangerine piece, the other tungsten piece of the spring 124 is the side plate 104 It is coupled to the engaging piece 126 is bent on.

Therefore, the spring 124 provides the elastic force to the rotating plate 120 using the side plate 104 as a support point.

Meanwhile, an end portion of the U-shaped pin 128 is coupled to the middle portion of the latch 116, and the other end is coupled to the outside of the switch gear 130 rotatably installed on the side plate 104. At this time, the switch gear 130 is rotatably installed in the case while the gear 132 is coupled to the gear so that the user can operate the breaker arbitrarily.

Referring to the conventional circuit breaker having the above configuration is as follows.

First, when a short-circuit accident or overload occurs in the process of supplying the current supplied through the switchboard to the motor, the bimetal installed inside the motor rotates the latch holder 114 to release the locking state by causing the shape displacement. The movement of 116 is made free.

In the above state, the rotating plate 120 rotates about the fixed shaft 122 by the elastic force accumulated in the spring 124, and pulls the pin 118, and at the same time, the latch 116 by the pin 118. ) Will be pulled.

At this time, the upper part of the latch 116 is spaced apart from the latch holder 114 and is caught by the latching surface 110 of the latch stopper 106 to stop the movement.

At the same time, the switch gear 130 is pulled and rotated by another pin 128 coupled to the latch 116, and the handle 132 geared by the switch gear 130 rotates.

As described above, a trip state occurs when the switch is turned off while operating by the bimetal that is thermally deformed and the current flow is momentarily interrupted.

Unlike the above, the case where the user arbitrarily blocks the flow of current is as follows.

When the user rotates the handle 132, the switchgear 130 is rotated to transmit the action force to the latch 116 through the pin 128, the latch 116 is passed through the locking surface 110, the upper portion It is positioned on the latch stopper 106.

At the same time, the pin 118 coupled to the latch 116 transmits an action force to the pivoting plate 120 to rotate about the fixed shaft 122.

Therefore, the elastic force accumulated in the spring 124 is further extinguished.

As described above, the handle 132 is positioned in the blocked state or the tripped mode indicated on the case according to the degree of rotation.

On the other hand, the mechanism 102 of the open / close switch executes the latch stopper 106 and the latch stopper protrusion 112, separates the latch 116 from the latch stopper inclined surface 108, and slides the latch. When the reverse vibration is fixed from the stopper engaging surface 110, the latch stopper engaging surface 110 is provided on the latch stopper inclined surface 108 and the lower surface thereof, so that the latch 116 has the latch stopper engaging surface 110. Decide on trip position.

However, the conventional circuit breaker having the above configuration is forcibly released by rubbing the latch 116 having a metallic material on the inclined surface 108 and the engaging surface 110 of the latch stopper 106 made of a plastic material. Severe wear of the inclined surface 108 and the engaging surface 110 of the latch stopper 106 having the plastic material may occur. For this reason, the conventional circuit breaker has a problem of generating an error by leaving the trip position.

In addition, since the conventional circuit breaker forms a complicated structure, there is a problem that the productivity increases due to an increase in the work process, and the manufacturing cost increases.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide a lock device of a circuit breaker having a trip position to control the trip position so that the trip state of the breaker due to the abnormal current from the outside. It is.

Locking device of the circuit breaker having a trip position according to the present invention for achieving the above object,

A rotary handle, a mechanism of a circuit breaker provided below the handle, a side plate supporting the parts of the mechanism, a handle gear rotatably installed on the side plate, a latch and a latch holder provided on the side plate, and the latch and In the wiring breaker comprising a U-shaped pin for interlocking the handle connecting gear,

A protruding portion having an embossed shape for blocking the U-shaped pin to stop at the trip position between ON and OFF when the breaker is tripped is formed on the side plate.

The protruding portion is characterized in that the user gently releases the restraint of the U-shaped pin when the user resets the mechanism 2 of the breaker.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is a perspective view showing a handle driving device in the closing state of the breaker according to the present invention.

As shown in FIG. 4, the handle driving device of the breaker is provided with a side plate 6 constituting the mechanism 2 and supporting and fixing a part inside the case 4, and an upper portion of the case 4. The rotary handle 8 is rotatably coupled to the distal end by forming a gear.

The handle 8 is coupled to the shaft 12 to be rotatably coupled to the side plate 6 while the gear coupling gear 10 for intermittent the flow of current to the handle (8), the working force outside the handle connection gear 10 One end of the U-shaped pin 14 for transmitting the coupling is coupled to the other end of the U-shaped pin 14, while the latch 16, which moves together by the acting force transmitted, forms the upper engaging portion 18 on the upper side. It is arranged on the side plate 6.

A latch holder 22 having a lower end portion 20 coupled to the upper end catching portion 18 at an end thereof is rotatably installed on the side plate 6, and a short circuit accident or a motor is disposed on the outer side of the latch holder 22. When an overload is generated and heat is generated, a bimetal (not shown) is installed to provide heat and deformation.

In addition, one end of the link 24 for transmitting an acting force is coupled to the lower side of the latch 16, and the other end of the link 24 is coupled to the rotating plate 26 moving together by the acting force transmitted to the side plate 6. Is placed on.

The spring 28 providing the acting force with the elastic force accumulated on the rotating plate 26 installed as described above is coupled to the protrusion 30 formed on the side plate 6, wherein the end of the fingering piece of the spring 28 Coupled to the copper plate 26, another bullet piece of the spring 28 is fixed on the side plate 6.

On the other hand, the protruding portion 32 which defines the position when the U-shaped pin 14 is moved is formed to protrude on the side plate 6 while being positioned outside the handle connecting gear 10.

The mechanism 2 engages the lower end 20 of the latch holder 22 by the accumulated force of the lower spring 28 when the latch holder 22 moves due to a short circuit accident or an overload of a motor. The upper locking portion 18 of the latch 16 is disengaged. At this time, due to the protruding portion 32 formed on the side plate 6 constituting the mechanism 2 and supporting and fixing the component, the latch 16 and the handle connecting gear 10 interlock with each other. The U-shaped pin 14 is stopped. This position represents the handle 8 in a trip state.

5 is a perspective view illustrating a handle driving device in a tripped state of the circuit breaker of FIG. 4, and FIG. 6 is a perspective view illustrating a handle driving device in a reset or disconnected state of FIG. 4.

The mechanism 2 that provided the trip state indicates that it is tripping outwards through the handle 8 at the top, as shown in FIG. 5 above.

And, when forcibly reset or blocked, as shown in FIG. 6, the U-shaped pin 14 gently rides over the protruding portion 32 to return to the blocked state.

7 is an explanatory diagram for explaining the correlation between the protruding portion 32 and the U-shaped pin 14 according to the present invention.

As shown in FIG. 7, the U-shaped pin 14 formed on the side plate 6 can be moved to the ON position and the OFF position forcibly on the protruding portion 32. It is free in the state which did not pass the said projection part 32.

Preferred embodiments of the present invention as described above are disclosed for purposes of illustration, and those skilled in the art will be able to make various modifications, changes, additions, etc. within the spirit and scope of the present invention, such modifications and changes belong to the following claims Should be seen.

As described above, the lock device of the breaker having a trip position according to the present invention, the operation handle for turning on (ON), off (OFF) the position of the trip state due to the abnormal current in the event of an accident or abnormal current inflow. By controlling the position of, the trip state due to the abnormal current from the outside can be known.                     

In addition, since the mechanism capable of controlling the trip position is configured without the addition of a latch stopper component that determines the trip position, there is an effect of reducing material cost and making stable trip position control.

Claims (2)

Rotary handle (8), mechanism (2) of the breaker provided under the handle (8), side plate (6) for supporting the components of the mechanism (2), and gears for the handle rotatably mounted on the side plate 10, a latch 16 and a latch holder 22 provided on the side plate 6, and a U-shaped pin 14 for interlocking the latch 16 and the handle connecting gear 10. In the circuit breaker for wiring, The side plate is provided with a protruding portion 32 having an embossed shape that stops the U-shaped pin 14 so that the handle 8 stops at the trip position between ON and OFF when the breaker trips. (6) A lock of a circuit breaker having a trip position, characterized in that formed on. The method of claim 1, wherein the protruding portion 32, The lock device of a breaker having a trip position, characterized in that the user gently resets the restraint of the U-shaped pin (14) when the user resets the breaker mechanism (2).

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