KR20220091062A - Molded case circuit breaker - Google Patents

Abstract

The present invention relates to a circuit breaker for wiring in which a shooter is rotated by gas pressure and trips the circuit breaker. A shooter coupled to the frame rotatably in the opposite direction to the frame, the shooter is coupled through the frame, the shooter is relatively rotatably coupled to one side of the frame disposed outside the frame, and the other side is inside the frame Disclosed is a circuit breaker for wiring, comprising a disposed pusher.

Description

Circuit breaker for wiring {Molded case circuit breaker}

The present invention relates to a circuit breaker for wiring, and more particularly, to a circuit breaker for which a shooter is rotated by the pressure of a gas and trips the circuit breaker.

A circuit breaker is a device that is designed to automatically cut off a circuit when a current exceeding the rated current flows in the circuit to prevent accidents due to overcurrent. Among them, a circuit breaker (MCCB, Molded Case Circuit Breaker) is provided in the wiring and accommodated in the mold case.

The circuit breaker for wiring includes a fixed terminal part energably connected to an external power source or load and a movable terminal part energably connected to or separated from the fixed terminal part. When an overcurrent flows through the circuit breaker, the fixed terminal part and the movable terminal part are separated and the current is cut off. This is called a trip process, and a device that performs the trip process is called a trip device.

In the circuit breaker for wiring according to the related art, when an overcurrent is applied, a shooter provided in the detection mechanism unit is rotated. With a steady current energized, the shooter restrains the nail. As the shooter is rotated, the nail is released from the shooter and rotates, and the mechanism connected to the nail is also rotated.

In the circuit breaker for wiring according to an embodiment of the prior art, the shooter is rotated by the pressure of the gas generated during the blocking operation.

However, in the circuit breaker for wiring, gas and carbonized material leak to the outside along the shooter in the trip process. Leaked carbonized material may contaminate the inside of the circuit breaker. When a carbide material adheres to the insulating material construction of a circuit breaker, the insulating performance is deteriorated and there is a possibility that a short circuit may occur between the different phases.

In addition, in the circuit breaker for wiring according to another embodiment of the prior art, the trip device is returned to the initial position by the return spring.

However, in the circuit breaker for wiring, the return spring may be deteriorated, which may cause malfunction of the trip device. Furthermore, this may cause a decrease in the reliability of the trip device return operation.

Korean Patent Publication No. 10-1027780 discloses an arc pressure trip device. In detail, an arc pressure trip device is disclosed that uses a high-pressure arc gas to quickly operate a reset lever to make a trip.

However, in this type of arc pressure trip device, gas and carbonized material are discharged along the trip member in the trip process. That is, a structure in which the space between the frame of the single-pole blocking unit and the trip member is blocked during the blocking operation is not disclosed.

Korean Patent Publication No. 10-0480008 discloses a circuit breaker. Specifically, disclosed is a circuit breaker including an opening/closing mechanism unit that moves depending on whether a trip bar into which a screw for adjusting a gap is inserted is constrained, and a detection mechanism unit having a bimetal.

However, in this type of circuit breaker, a return spring is required in performing the operation of returning the trip bar to the initial position. Accordingly, deterioration of the return spring and malfunction of the circuit breaker due to this may occur.

Korea Patent Publication No. 10-1027780 (Mar. 31, 2011) Korean Patent Publication No. 10-0480008 (2005.03.22.)

SUMMARY OF THE INVENTION One object of the present invention is to provide a circuit breaker in which the amount of gas and carbonized material leaking from the inside of the frame to the outside along the trip device and the resulting pollution are reduced.

Another object of the present invention is to provide a circuit breaker for wiring that does not require a separate return spring when a trip device returns to an initial position.

Another object of the present invention is to provide a circuit breaker for wiring in which coupling between components of a trip device is stably maintained and reliability of trip operation is improved.

In order to achieve the above object, a circuit breaker for wiring according to an embodiment of the present invention includes: a frame having a space formed therein, and a coupling protrusion protruding from an outer circumferential surface; a nail rotatably coupled to the frame to perform a trip operation; and a trip device positioned adjacent to the nail, rotatably coupled to the frame in a direction toward the nail or in a direction opposite to the nail, and provided with a shooter and a pusher, the trip device comprising: The shooter includes: a sliding bar extending in one direction, a coupling hole through which the coupling protrusion is inserted, and rotatably coupled to the frame with the coupling protrusion as an axis; a striking unit coupled to one end of the sliding bar toward the nail and collides with the nail when the trip device is rotated in a direction toward the nail; and a cross section coupled to the other end opposite to the one end of the sliding bar and extending in a direction different from the one direction, wherein the pusher is coupled to the frame through one side and disposed outside the frame The cross section is coupled through the relatively rotatably, and the other side and the other side are disposed inside the frame.

In addition, a reset lever coupled to the frame rotatably in a direction facing the shooter or in a direction opposite to the shooter; and a handle that is rotatably coupled to the frame in a direction facing the reset lever or opposite to the reset lever and collides with a portion of the reset lever when rotated in a direction facing the reset lever, the shooter comprising: includes a reset unit protruding from one surface of the shooter facing the reset lever, having a reset contact surface facing the reset lever, and rounded to be convex in a direction opposite to the reset lever, the reset lever The other portion opposite to the one portion may include an inclined surface that collides with the reset contact surface when the reset lever is rotated in a direction toward the shooter.

In addition, the handle is provided with a lever proximity contact surface that collides with the part of the reset lever when the handle is rotated in a direction toward the reset lever, and the part of the reset lever has a contact surface with the lever proximity A handle proximal contact surface formed in a shape of a can be formed.

In addition, the pusher, is disposed on the outside of the frame, is formed in a cylindrical shape, the bearing portion is rotatably coupled through the cross section therein; a pressure plate disposed inside the frame and formed in a plate shape; and a connection part positioned between the bearing part and the pressure plate, coupled to the bearing part and the pressure plate, respectively, and coupled through the frame.

In addition, in the frame, the receiving part into which the connection part is inserted may be formed through, and the cross-sectional area of the receiving part may be formed to be larger than the cross-sectional area of the connecting part.

Also, a cross-sectional area of the receiving part may be smaller than a cross-sectional area of the pressing plate.

In addition, the inner circumferential surface of the frame, a portion positioned adjacent to the pressure plate may be recessed in a direction opposite to the pressure plate, and may be formed in a shape corresponding to the pressure plate.

In addition, the surface of the cross section and the surface of the connecting portion may be polished.

In addition, the pressure plate may be formed of an elastic material.

In addition, the striking unit includes a striking surface that collides with the nail when the shooter is rotated in a direction toward the nail, and the nail is a shooter that collides with the striking surface when the shooter is rotated in a direction toward the nail A close contact portion may be provided, and the shooter proximity contact portion may be positioned adjacent to the striking surface and formed in a shape corresponding to the striking surface.

In addition, a width of a portion of the sliding bar adjacent to the coupling hole may be greater than a width of the remaining portion of the sliding bar.

In addition, the circuit breaker for wiring according to another embodiment of the present invention, a space for accommodating a current-carrying unit therein is formed, the frame having a coupling protrusion protruding from the outer circumferential surface; a nail rotatably coupled to the frame to perform a trip operation; and a shooter positioned adjacent to the nail and rotatably coupled to the frame in a direction toward the nail or in a direction opposite to the nail, wherein the shooter is formed in a pillar shape extending in one direction, a sliding bar that includes a coupling hole into which the coupling protrusion is inserted, and is rotatably coupled to the frame based on the coupling protrusion; a striking part coupled to one end of the sliding bar adjacent to the nail and collided with the nail when the shooter is rotated in a direction toward the nail; a transverse portion disposed outside the frame, coupled to the other end opposite to the one end of the sliding bar, and extending in a direction different from the one direction; a pressure plate disposed inside the frame and formed in a plate shape; And it is positioned between the cross section and the pressure plate is coupled to each of the cross section and the pressure plate, curved and extended in a direction from the cross section toward the striking portion, it includes a connection portion that is coupled through the frame.

In addition, a reset lever coupled to the frame rotatably in a direction facing the shooter or in a direction opposite to the shooter; and a handle that is rotatably coupled to the frame in a direction facing the reset lever or opposite to the reset lever and collides with a portion of the reset lever when rotated in a direction facing the reset lever, the shooter comprising: includes a reset unit protruding from one surface of the shooter facing the reset lever, having a reset contact surface facing the reset lever, and rounded to be convex in a direction opposite to the reset lever, the reset lever The other portion opposite to the one portion may include an inclined surface that collides with the reset contact surface when the reset lever is rotated in a direction toward the shooter.

In addition, the handle is provided with a lever proximity contact surface that collides with the part of the reset lever when the handle is rotated in a direction toward the reset lever, and the part of the reset lever has a contact surface with the lever proximity A handle proximal contact surface formed in a shape of a can be formed.

In addition, in the frame, the receiving part into which the connection part is inserted may be formed through, and the cross-sectional area of the receiving part may be formed to be larger than the cross-sectional area of the connecting part.

Also, a cross-sectional area of the receiving part may be smaller than a cross-sectional area of the pressing plate.

In addition, the inner circumferential surface of the frame, a portion positioned adjacent to the pressure plate may be recessed in a direction opposite to the pressure plate, and may be formed in a shape corresponding to the pressure plate.

In addition, the surface of the connection part may be polished.

In addition, the pressure plate may be formed of an elastic material.

In addition, the striking unit includes a striking surface that collides with the nail when the shooter is rotated in a direction toward the nail, and the nail is a shooter that collides with the striking surface when the shooter is rotated in a direction toward the nail A close contact portion may be provided, and the shooter proximity contact portion may be positioned adjacent to the striking surface and formed in a shape corresponding to the striking surface.

In addition, a width of a portion of the sliding bar adjacent to the coupling hole may be greater than a width of the remaining portion of the sliding bar.

Among the various effects of the present invention, the effects that can be obtained through the above-described solution are as follows.

First, the pressure plate of the pusher is disposed inside the frame, and is moved toward the inner circumferential surface of the frame by the gas generated during the blocking operation. That is, the gas generated during the blocking operation brings the pressure plate of the pusher into close contact with the inner circumferential surface of the frame.

Accordingly, the trip device receiving portion of the frame can be blocked by the pressure plate. That is, it is possible to prevent gas and carbonized material existing inside the frame from being discharged to the outside of the frame through the trip device accommodating part.

Accordingly, it is also possible to prevent contamination of the insulating material configuration of the circuit breaker due to the leaked carbonized material.

Furthermore, the insulation function of the circuit breaker for wiring is improved, and the possibility of malfunction can be further reduced.

Also, when the handle is rotated toward the reset lever, it collides with the reset lever and returns the trip device to the initial position. Specifically, when the reset lever collides with the handle and rotates, it comes into contact with the inclined surface of the shooter. The shooter in contact with the reset lever is rotated along the reset lever in a direction opposite to the tripping action. As a result, the pusher engaged with the shooter is returned to the initial position.

In summary, when the operation of returning the trip device to the initial position is performed, a separate return spring is not required.

Accordingly, a problem due to deterioration of the return spring can be prevented. Specifically, a malfunction of the trip device due to deterioration of the return spring can be prevented.

As a result, the operation of returning the trip device to the initial position can be performed with higher reliability.

In addition, the shooter and the pusher are connected in a link structure to perform a trip operation. Specifically, when the pusher is moved by the gas generated during the blocking operation, the shooter is rotated and a trip operation is performed while hitting the nail of the mechanism.

Accordingly, the coupling between the components of the trip device can be stably maintained. Accordingly, the reliability of the trip operation may be further improved.

1 is a perspective view showing a circuit breaker for wiring according to an embodiment of the present invention.
FIG. 2 is a perspective view illustrating a single-pole blocking unit provided in the circuit breaker of FIG. 1 .
Fig. 3 is a right side view showing the single-pole blocking unit of Fig. 2;
FIG. 4 is a left sectional view showing the single-pole blocking unit of FIG. 2 .
5 is an exploded perspective view illustrating a frame part provided in the single-pole blocking unit of FIG. 2 .
Fig. 6 is an exploded front view showing the frame portion of Fig. 5;
7 is a perspective view illustrating a reset lever provided in the single-pole blocking unit of FIG. 2 .
Fig. 8 is a side view showing the reset lever of Fig. 7;
Fig. 9 is a plan view showing the reset lever of Fig. 7;
10 is a perspective view illustrating a trip device provided in the single-pole blocking unit of FIG. 2 .
Fig. 11 is a side view showing the trip device of Fig. 10;
Fig. 12 is a plan view showing the trip device of Fig. 10;
13 is a perspective view illustrating a shooter provided in the trip device of FIG. 10 .
Fig. 14 is a side view showing the shooter of Fig. 13;
Fig. 15 is a plan view showing the shooter of Fig. 13;
16 is a perspective view illustrating a shooter according to another embodiment of the present invention.
17 is a perspective view illustrating a pusher provided in the trip device of FIG. 10 .
Fig. 18 is a side view showing the pusher of Fig. 17;
Fig. 19 is a plan view showing the pusher of Fig. 17;
20 is a left cross-sectional view showing a single-pole blocking unit provided in a circuit breaker for wiring according to another embodiment of the present invention.
21 is a perspective view illustrating a trip device provided in the single-pole blocking unit of FIG. 20 .
22 is a left cross-sectional view illustrating a state of the circuit breaker for wiring according to an embodiment of the present invention (a) before performing a trip operation and (b) after performing a trip operation.
23 is a right side view showing the state of the circuit breaker of FIG. 22 before (a) performing a trip operation and (b) after performing a trip operation.
24 is a left cross-sectional view showing (a) a state in which a trip operation is performed and (b) a state in which the circuit breaker for wiring according to an embodiment of the present invention is returned to an initial state.

Hereinafter, the circuit breaker 1 for wiring according to an embodiment of the present invention will be described in more detail with reference to the drawings.

In the following description, in order to clarify the characteristics of the present invention, descriptions of some components may be omitted.

In the present specification, the same reference numerals are assigned to the same components even in different embodiments, and overlapping descriptions thereof will be omitted.

The accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical ideas disclosed in the present specification are not limited by the accompanying drawings.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

The terms "upper side", "lower side", left", "right", "front side", and "rear side" used in the following description refer to FIGS. 1, 5, 7, 10, 13, 16, It will be understood with reference to the coordinate system shown in FIGS. 17 and 21 .

1. Description of the circuit breaker (1) for wiring according to an embodiment of the present invention

Hereinafter, a circuit breaker 1 for wiring according to an embodiment of the present invention will be described with reference to FIGS. 1 to 9 . However, the rotation direction of each component will be understood with reference to FIG. 4 .

The circuit breaker 1 for wiring may allow or block an energized state between an external power source and a load. To this end, the circuit breaker 1 for wiring is connected to an external power source and load so as to conduct electricity. That is, the external power source and the load are connected to be energized by the circuit breaker 1 for wiring.

When a current higher than the rated current is passed, the fixed contact 212 and the movable contact 222 of the circuit breaker 1 for wiring may be spaced apart from each other. This process is called a trip process. In this case, the external power source and the load are not energized with each other, and damage to the power source or the load due to overcurrent can be prevented.

Hereinafter, the configuration of the circuit breaker 1 for wiring according to an embodiment of the present invention will be described with reference to the accompanying drawings, but the frame part 100, the energizing part 200, the arc extinguishing part 300, the mechanism (mechanism) 400 and trip devices 500 and 600 will be described in separate clauses.

(1) Description of the configuration of the circuit breaker (1) for wiring

The circuit breaker 1 for wiring is composed of a plurality of single-pole blocking units 10 . In this case, the two neighboring single-pole blocking units 10 are spaced apart from each other by a predetermined distance.

The single-pole blocking unit 10 is a part in which a trip operation is substantially performed when an overcurrent or a leakage current occurs.

The number of single-pole blocking units 10 may be determined according to the type of power system in which the circuit breaker 1 for wiring of the present invention is provided.

In one embodiment, the circuit breaker 1 for wiring is provided in a power system using a three-phase circuit of R-phase, S-phase and T-phase. Accordingly, three single-pole blocking units 10 are also provided according to the three-phase circuit.

In the illustrated embodiment, the circuit breaker 1 for wiring consists of three single-pole blocking units 10 . One single pole blocking unit 10 is provided with trip devices 500 , 600 and a mechanism 400 .

In the illustrated embodiment, the single pole blocking unit 10 includes a frame portion 100 , a energizing portion 200 , an arc extinguishing portion 300 , a mechanism 400 , and trip devices 500 , 600 . When an overcurrent is generated in the circuit breaker 1 for wiring, the trip devices 500 and 600 and the mechanism 400 are rotated and a trip operation is performed.

Hereinafter, the configuration of the single-pole blocking unit 10 will be described in more detail with reference to the accompanying drawings.

(2) Description of the frame part 100

Hereinafter, the frame unit 100 will be described with reference to FIGS. 5 and 6 .

The frame part 100 has a space formed therein. The space accommodates the conducting unit 200 and the arc extinguishing unit 300 . In addition, the mechanism 400 and the trip devices 500 and 600 are rotatably coupled to the frame part 100 .

In the illustrated embodiment, the frame part 100 is formed in a box shape.

Receptacles 111 and 121 into which the trip devices 500 and 600 are inserted are formed through the frame portion 100 . In the illustrated embodiment, the receiving portions 111 and 121 are formed through the front side of the frame portion 100 in the front-rear direction.

In the inner peripheral surface of the frame part 100 , a portion positioned adjacent to the trip devices 500 and 600 may be depressed in a direction opposite to the trip devices 500 and 600 . In this case, the one part may be formed in a shape corresponding to the trip devices 500 and 600 . Accordingly, the reliability of the operation in which the inner peripheral surface of the frame part 100 and the trip devices 500 and 600 are in close contact can be further improved.

A coupling protrusion 122 is formed to protrude from the outer peripheral surface of the frame part 100 . In the illustrated embodiment, the coupling protrusion 122 protrudes from the right side of the frame part 100 to the right.

A gas hole may be formed through one surface of the frame part 100 . The gas hole communicates with the internal space of the frame part 100 and the external space of the frame part 100 . In the illustrated embodiment, a plurality of gas holes are formed through one surface of the plurality of frame parts 100 facing each other.

When the mechanism 400 and the trip devices 500 and 600 are operated, the energizing part 200 accommodated in the inner space of the frame part 100 is rotated to generate an arc and gas. After the generated arc is extinguished while passing through the arc extinguishing unit 300 , it may flow into the outer space of the frame unit 100 through the gas hole.

In an embodiment, a plurality of frame units 100 may be provided. The plurality of frame units 100 may be arranged side by side in a predetermined direction. In this case, the two adjacent frame units 100 are spaced apart from each other by a predetermined distance.

In the illustrated embodiment, three frame units 100 are provided and are arranged side by side in the left and right direction. This is due to the three-phase current of R-phase, S-phase and T-phase passing through the circuit breaker 1 according to the embodiment of the present invention.

However, the frame part 100 may be changed according to the type of the phase of the current passed through the circuit breaker 1 for wiring.

The frame unit 100 may be formed of a plurality of components. In the illustrated embodiment, the frame unit 100 includes a left frame 110 and a right frame 120 . In the above embodiment, the left frame 110 and the right frame 120 are coupled to form a space for accommodating the current conducting unit 200 and the arc extinguishing unit 300 .

The left frame 110 forms the left side of the frame part 100 .

A portion of the inner peripheral surface of the left frame 110 adjacent to the trip devices 500 and 600 may be depressed in a direction opposite to the trip devices 500 and 600 . In this case, the one part may be formed in a shape corresponding to the trip devices 500 and 600 . Accordingly, the reliability of the operation in which the inner circumferential surface of the left frame 110 and the trip devices 500 and 600 are in close contact can be further improved.

A left accommodating part 111 into which the trip devices 500 and 600 are inserted is formed through the left frame 110 . In the illustrated embodiment, the left receiving part 111 is formed through the front side of the left frame 110 in the front-rear direction.

The left accommodating part 111 forms a passage through which the trip devices 500 and 600 are moved.

The right frame 120 forms the right side of the frame part 100 .

A portion of the inner peripheral surface of the right frame 120 adjacent to the trip devices 500 and 600 may be depressed in a direction opposite to the trip devices 500 and 600 . In this case, the one part may be formed in a shape corresponding to the trip devices 500 and 600 . Accordingly, the reliability of the operation in which the inner peripheral surface of the right frame 120 and the trip devices 500 and 600 are in close contact can be further improved.

A right receiving part 121 into which the trip devices 500 and 600 are inserted is formed through the right frame 120 . In the illustrated embodiment, the right receiving part 121 is formed through the front side of the right frame 120 in the front-rear direction.

The right receiving part 121 forms a passage through which the trip devices 500 and 600 are moved.

When the right accommodating part 121 is coupled to the left accommodating part 111 , one through hole is formed. The trip devices 500 and 600 are moved along the through hole.

In addition, a coupling protrusion 122 is formed to protrude from one surface of the right frame 120 . In the illustrated embodiment, the coupling protrusion 122 protrudes from the right side of the right frame 120 to the right.

The coupling protrusion 122 may extend at a predetermined angle with the right side of the right frame 120 . In an embodiment, the predetermined angle may be a right angle.

The coupling protrusion 122 is inserted into the trip devices 500 and 600 and serves as a rotation shaft of the trip devices 500 and 600 .

(3) Description of the energizing unit 200

Referring back to FIGS. 1 to 4 , the circuit breaker 1 for wiring according to the illustrated embodiment includes a conducting unit 200 .

The conduction unit 200 permits or blocks electricity between the circuit breaker 1 for wiring and an external power source or load. The energization is achieved by contacting the fixed terminal part 210 and the movable terminal part 220 . In addition, the blocking is achieved by separating the fixed terminal part 210 and the movable terminal part 220 from each other.

The conducting unit 200 is accommodated in the inner space of the frame unit 100 .

The conducting unit 200 is disposed adjacent to the arc extinguishing unit 300 .

The energizing unit 200 is energably connected to an external power source and a load.

A plurality of conducting units 200 may be provided. The plurality of energizing units 200 may be accommodated in the plurality of frame units 100 , respectively. In the illustrated embodiment, three current-carrying units 200 are provided, each accommodated in the three frame units 100 .

In addition, the conducting unit 200 is connected to the mechanism 400 . When the mechanism 400 is operated, the energization unit 200 is also operated to cut off electricity between the circuit breaker 1 for wiring and an external power source or load.

The conducting unit 200 may be formed of a conductive material. For example, the conducting part 200 may be formed of copper (Cu), silver (Ag), or the like.

In the illustrated embodiment, the conducting unit 200 includes a fixed terminal unit 210 , a movable terminal unit 220 , and a rotating shaft 230 .

The fixed terminal unit 210 and the movable terminal unit 220 are in contact with or spaced apart from each other, allowing or blocking the energization of the circuit breaker 1 for wiring. The contact or separation may be achieved by rotating the rotating shaft 230 .

The fixed terminal unit 210 is electrically connected to an external power source or load. Through the fixed terminal unit 210, the circuit breaker 1 for wiring may be connected to an external power source or load to be energized.

A portion of the fixed terminal unit 210 is accommodated in the inner space of the frame unit 100 .

At this time, the fixed terminal unit 210 does not move in the inner space of the frame unit 100 . Accordingly, contact and separation between the fixed terminal part 210 and the movable terminal part 220 is achieved by the movement of the movable terminal part 220 .

The rest of the fixed terminal part 210 except for the one part is exposed to the outside of the frame part 100 . The remaining portion may be electrically connected to an external power source or load by a conducting wire member (not shown).

A plurality of fixed terminal units 210 may be provided. In the illustrated embodiment, two fixed terminal units 210 are provided, and are respectively located on the front side and the rear side of the frame unit 100 . In addition, in the above embodiment, the two fixed terminal parts 210 are arranged to be point-symmetrical with respect to the central axis of the rotation shaft 230 .

The plurality of fixed terminal units 210 may be electrically connected to each other. The connection is formed by contacting each of the plurality of movable terminal units 220 with the plurality of fixed terminal units 210 .

The fixed terminal unit 210 is disposed adjacent to the arc extinguishing unit 300 . In the illustrated embodiment, the fixed terminal unit 210 disposed on the front side is located above the arc extinguishing unit 300 . In addition, the fixed terminal unit 210 disposed on the rear side is located below the arc extinguishing unit 300 .

In the illustrated embodiment, the fixed terminal unit 210 includes a fixed contact bar 211 and a fixed contact 212 .

The fixed contact point 211 is electrically connected to an external power source or load.

A portion of the fixed contact point is accommodated in the inner space of the frame portion 100 , and the remaining portion is exposed to the outside of the frame portion 100 .

In the illustrated embodiment, the fixed contact point is provided on the front side and the rear side of the frame part 100 , respectively. The fixed contact bar 211 disposed on the front side is exposed and extended toward the front side of the frame part 100 , and the fixed contact point disposed on the rear side is extended and exposed toward the rear side of the frame part 100 .

In the illustrated embodiment, the fixed contact bar 211 is formed in a U-shape.

The fixed contact bar 211 is electrically connected to the fixed contact 212 .

The fixed contact 212 is in contact with or spaced apart from the movable contact 222 . Accordingly, the circuit breaker 1 for wiring may be energized or cut off with an external power source or load.

The fixed contact 212 is electrically connected to the fixed contact stand 211 . The fixed contact 212 is disposed adjacent to the fixed contact stand 211 .

In the illustrated embodiment, the fixed contact 212 disposed on the front side is located below the fixed contact point 211 , and the fixed contact 212 disposed on the rear side is located above the fixed contact point 211 . do.

In an embodiment, the fixed contact 212 may be integrally formed with the fixed contact stand 211 .

The movable terminal part 220 is connected to or separated from the fixed terminal part 210 so as to be energized. Through the movable terminal part 220 , the plurality of fixed terminal parts 210 may be electrically connected to each other. As a result, the circuit breaker 1 for wiring can be electrically connected to an external power source or load.

The movable terminal part 220 is accommodated in the inner space of the frame part 100 . The movable terminal part 220 is movably coupled to the inner space of the frame part 100 .

The movable terminal part 220 is coupled to the rotation shaft 230 . When the rotation shaft 230 rotates, the movable terminal part 220 may also rotate together with the rotation shaft 230 .

The movable terminal part 220 is electrically connected to the rotation shaft 230 . Accordingly, the current flowing in through the fixed terminal unit 210 may be transmitted to the movable terminal unit 220 and the rotation shaft 230 .

A plurality of movable terminal units 220 may be provided. In the illustrated embodiment, the circuit breaker 1 for wiring is provided with two movable terminal units 220 , and is located at the front side and the rear side of the frame unit 100 , respectively. In addition, in the above embodiment, the two movable terminal units 220 are arranged to be point-symmetrical with respect to the central axis of the rotation shaft 230 .

The plurality of movable terminal units 220 may be in contact with or spaced apart from the plurality of fixed terminal units 210 to be energized, respectively. That is, the movable terminal unit 220 may be rotated to contact the fixed terminal unit 210 , or rotated to be spaced apart from the fixed terminal unit 210 . The contact and separation may be achieved according to the rotation of the rotation shaft 230 to which the movable terminal part 220 is connected.

The movable terminal unit 220 is disposed adjacent to the arc extinguishing unit 300 .

In the illustrated embodiment, the movable terminal part 220 disposed on the front side is disposed adjacent to the arc extinguishing part 300 at the lower side of the fixed terminal part 210 , and the movable terminal part 220 disposed on the rear side is a fixed terminal part It is disposed adjacent to the arc extinguishing unit 300 on the upper side of the 210 .

In the above embodiment, the movable terminal part 220 may be spaced apart from the fixed terminal part 210 as the rotating shaft 230 rotates clockwise. Conversely, when the rotation shaft 230 rotates counterclockwise, the movable terminal part 220 may come into contact with the fixed terminal part 210 .

In summary, as the rotation shaft 230 rotates, the plurality of fixed terminal units 210 and the movable terminal units 220 may be in contact with each other or spaced apart from each other to be energized.

In the illustrated embodiment, the movable terminal unit 220 includes a movable contact bar 221 and a movable contact 222 .

The movable contact point 221 is electrically connected to the rotation shaft 230 .

When the rotating shaft 230 is rotated, the movable contact point 221 may also be rotated. Accordingly, the movable contact bar 221 may be rotationally moved in a direction toward the fixed terminal unit 210 or in a direction opposite to the fixed terminal unit 210 .

In the illustrated embodiment, a plurality of movable contact points 221 are provided and are respectively connected to the front side and the rear side of the rotation shaft 230 . The movable contact bar 221 disposed on the front side is in contact with or spaced apart from the fixed terminal part 210 disposed on the front side to be energized. The movable contact bar 221 disposed on the rear side is in contact with or spaced apart from the fixed terminal unit 210 disposed on the rear side to be energized.

In the illustrated embodiment, the movable contact bar 221 is formed in a bar shape extending in a predetermined direction.

The movable contact point 221 is connected to the movable contact 222 so as to be energized.

The movable contact 222 is in contact with or spaced apart from the fixed contact 212 . Accordingly, the circuit breaker 1 for wiring may be energized or cut off with an external power source or load.

The movable contact 222 is electrically connected to the movable contact stand 221 . The movable contact 222 is positioned adjacent to the movable contact stand 221 .

In the illustrated embodiment, the movable contact 222 disposed on the front side is located on the upper side of the movable contact point 221 , and the movable contact point 222 disposed on the rear side is located on the lower side of the movable contact point 221 . do.

In one embodiment, the movable contact 222 may be integrally formed with the movable contact stand 221 .

The rotation shaft 230 is connected to the movable terminal part 220 and rotates together with the movable terminal part 220 . By rotation of the rotation shaft 230 , the movable terminal part 220 may be in contact with or spaced apart from the fixed terminal part 210 to be energized.

The rotating shaft 230 is rotatably coupled to the frame unit 100 . Specifically, the rotation shaft 230 is rotatably accommodated in the inner space of the frame unit 100 .

The rotation shaft 230 is connected to the movable terminal part 220 . In the illustrated embodiment, the front side of the rotation shaft 230 is connected to the movable terminal part 220 disposed on the front side, and the rear side of the rotation shaft 230 is connected to the movable terminal part 220 disposed on the rear side.

In addition, the rotating shaft 230 is electrically connected to the movable terminal part 220 . Accordingly, the current flowing into the circuit breaker 1 through the fixed terminal unit 210 may proceed toward the other fixed terminal unit 210 through the movable terminal unit 220 and the rotating shaft 230 .

In the illustrated embodiment, the rotation shaft 230 is formed in a disk shape.

When an overcurrent is applied to the circuit breaker 1 for wiring, the rotating shaft 230 is rotated to separate the movable terminal part 220 and the fixed terminal part 210 from each other. In the illustrated embodiment, the rotating shaft 230 may be rotated clockwise to cut off electricity between the circuit breaker 1 for wiring and an external power source or load.

(4) Description of arc extinguishing unit 300

The arc extinguishing unit 300 induces an arc generated when the fixed terminal unit 210 and the movable terminal unit 220 are spaced apart when the overcurrent is energized. After the generated arc passes through the arc extinguishing unit 300 and is extinguished, it may be discharged to the outside of the frame unit 100 through the gas hole of the frame unit 100 .

The arc extinguishing unit 300 is accommodated in the inner space of the frame unit 100 .

The arc extinguishing unit 300 is positioned adjacent to the fixed terminal unit 210 and the movable terminal unit 220 . In the illustrated embodiment, the arc extinguishing unit 300 may be disposed to overlap the fixed contact 212 and the movable contact 222 in the left and right directions.

A plurality of arc extinguishing units 300 may be provided. The plurality of arc extinguishing units 300 may be positioned adjacent to the plurality of fixed terminal units 210 and the plurality of movable terminal units 220 , respectively.

In the illustrated embodiment, two arc extinguishing units 300 are provided. Specifically, the arc extinguishing unit 300 is positioned adjacent to the terminal parts 210 and 220 disposed on the front side and the terminal parts 210 and 220 disposed on the rear side, respectively.

In an embodiment, the arc extinguishing unit 300 may include a plurality of grids (not shown) and a support plate (not shown) coupled thereto.

(5) Description of the mechanism (400)

The mechanism 400 operates together with the trip unit when an overcurrent is energized to cut off energization between the circuit breaker 1 for wiring and an external power source or load.

Mechanism 400 is coupled to the trip unit. When the trip portion is rotated to actuate, the mechanism 400 may also be rotated.

In addition, the mechanism 400 is also connected to the energizing unit 200 . When the mechanism 400 is rotated and actuated, the movable contact 222 may be spaced apart from the stationary contact 212 . Accordingly, the circuit breaker 1 for wiring is electrically separated from an external power source or load.

The arc generated in the inner space of the frame unit 100 during the operation of the mechanism 400 passes through the arc extinguishing unit 300 and is extinguished and then discharged to the outside through the gas hole of the frame unit 100 .

In the illustrated embodiment, the mechanism 400 includes a nail 410 , a pedal 420 , a crossbar 430 , a handle 440 , and a reset lever 450 .

The nail 410 is rotatably coupled to the frame part 100 .

The nail 410 may be rotated by the trip devices 500 and 600 in a direction toward the pedal 420 or in a direction opposite to the pedal 420 . A central axis on which the nail 410 is rotated may be defined as a nail rotation axis 411 .

In a state in which a normal current is applied, the nail 410 constrains the pedal 420 . At this time, arbitrary rotation of the pedal 420 is prevented by the restraint of the nail 410 .

As the nail 410 rotates, the pedal 420 is released from the nail 410 and rotates, and the crossbar 430 and the handle 440 connected to the pedal 420 are also rotated. Through the above process, when an overcurrent is passed through the circuit breaker 1 for wiring, the conduction between the external power source and the load may be cut off.

In addition, when the nail 410 is rotated opposite to the above process, the pedal 420 is again constrained to the nail 410 and may be returned to an initial state together with the crossbar 430 and the handle 440 .

The nail 410 may be formed of a material of high rigidity. For example, the nail 410 may be formed of a metal material. This is to prevent the nail 410 from being physically damaged when the pedal 420 is pressed or pressed by the trip devices 500 and 600 .

In the illustrated embodiment, the nail 410 includes a nail rotation shaft 411 and a nail body portion 412 .

The nail rotation shaft 411 is through-coupled to the nail body 412 and the frame 100, respectively.

In the illustrated embodiment, the nail rotation shaft 411 is formed in a cylindrical shape extending in the left and right direction.

The nail body part 412 forms the outer shape or body of the nail 410 .

The nail body 412 may be rotated clockwise or counterclockwise about the nail rotation shaft 411 .

When an overcurrent is applied to the circuit breaker 1 for wiring, the trip devices 500 and 600 strike the nail body portion 412 . Accordingly, the nail body 412 is rotated clockwise, and the pedal 420 is released from the nail body 412 . As a result, conduction between the external power source and the load connected to the circuit breaker 1 for wiring may be cut off.

In the illustrated embodiment, the nail body portion 412 extends in the left and right directions and extends downward from both sides of the central portion and the central portion into which the nail rotation shaft 411 is inserted, and may collide with the trip devices 500 and 600 . It can be distinguished by the wing part.

A shooter proximity contact portion 412a is formed on the front side of the nail body portion 412 based on the nail rotation shaft 411 , and a pedal proximity contact portion 412b is formed on the rear side thereof.

The shooter proximity contact portion 412a is a portion pressed by the trip devices 500 and 600 when the trip devices 500 and 600 are rotated.

Shooter proximity contact 412a is disposed adjacent to trip device 500 , 600 . In the illustrated embodiment, the shooter close contact portion 412a is disposed below the nail body portion 412 .

When the trip devices 500 and 600 are rotated toward the nail 410 , the shooter proximity contact 412a collides with the trip devices 500 and 600 . Accordingly, the nail 410 may be rotated in a direction opposite to the rotation direction of the trip devices 500 and 600 .

The pedal proximity contact portion 412b is a portion that collides with the pedal 420 when the nail 410 is rotated.

Pedal proximate contact 412b is disposed adjacent to pedal 420 . In addition, the pedal proximity contact portion 412b is disposed on the opposite side to the shooter proximity contact portion 412a with respect to the nail rotation shaft 411 . In the illustrated embodiment, the pedal proximity contact portion 412b is disposed on the upper side of the nail body portion 412 .

In a state in which a steady current is applied, the pedal proximity contact 412b constrains the pedal 420 .

When an overcurrent is applied to the circuit breaker 1 for wiring, as the pedal proximity contact 412b rotates, the pedal 420 is released from the restraint and rotates. Accordingly, the crossbar 430 and the handle 440 connected to the pedal 420 are also rotated. As a result, the energization between the external power supply and the load may be cut off by the circuit breaker 1 for wiring.

When the pedal proximity contact portion 412b is rotated in a direction opposite to the above process, the pedal 420 may be restrained again. Accordingly, the pedal 420 , the crossbar 430 , and the handle 440 may be rotated together.

The pedal proximity contact 412b may be formed in any shape capable of restraining the pedal 420 . In an embodiment, the pedal proximity contact portion 412b may be formed in a hook shape.

The pedal 420 is connected to the crossbar 430 and the handle 440 to transmit the rotational motion of the trip devices 500 and 600 to the crossbar 430 and the handle 440 . To this end, the pedal 420 is disposed between the crossbar 430 and the trip device 500 , 600 . That is, the trip devices 500 and 600, the pedal 420, and the crossbar 430 are sequentially disposed from the front to the rear.

Random rotation of the pedal 420 is prevented by the restraint of the nail 410 in a state in which a normal current is applied. Conversely, in a state in which the overcurrent is energized, the pedal 420 is released from the nail 410 and can be rotated in a predetermined direction.

The pedal 420 is connected to the crossbar 430 and the handle 440 . Accordingly, when the pedal 420 is rotated in the predetermined direction, the crossbar 430 and the handle 440 are also rotated in the predetermined direction.

In the illustrated embodiment, the pedal 420 includes a pedal coupling member 421 , a pedal body 422 and a pedal spring 423 .

The pedal coupling member 421 rotatably couples the pedal body 422 to the frame 100 . Specifically, the pedal coupling member 421 is coupled through the pedal body 422 and the frame 100, respectively. In the illustrated embodiment, the pedal coupling member 421 is coupled through the lower side of the pedal body 422 .

In addition, the pedal coupling member 421 serves as a rotation shaft of the pedal 420 .

In the illustrated embodiment, the pedal coupling member 421 is formed in a cylindrical shape extending in the left and right direction.

The pedal body 422 forms the outer shape or body of the pedal 420 .

The pedal body 422 is coupled to the frame 100 to be rotatable about the pedal coupling member 421 as an axis.

In the illustrated embodiment, the pedal body 422 extends in the left and right directions, the pedal 420 rotation shaft is coupled therethrough, and the crossbar 430 is directly coupled to the central portion thereof, and is formed to extend upward from both sides of the central portion. It can be divided into a wing that can collide with the devices 500 and 600 .

In addition, in the illustrated embodiment, a nail close contact portion 422a is formed on one side of the pedal body portion 422 , and a pedal concavo-convex portion 422b is formed on the other side of the pedal body portion 422 .

The nail proximity contact portion 422a is a portion directly constrained by the nail 410 when a normal current is applied thereto.

The nail proximal contact portion 422a is disposed adjacent to the pedal proximate contact portion 412b of the nail 410 . In the illustrated embodiment, the nail close contact portion 422a is disposed on the upper side of the pedal body portion 422 .

When the nail 410 is rotated, the nail proximal contact portion 422a of the pedal 420 is released from the restraint of the pedal proximate contact portion 412b of the nail 410 . Accordingly, the pedal 420 may be rotated in the same direction as the rotation direction of the nail 410 .

Also, when the nail 410 is rotated in the opposite direction to the above process, the nail proximity contact portion 422a may be constrained to the nail 410 again.

The pedal concavo-convex portion 422b is disposed adjacent to the crossbar 430 . In the illustrated embodiment, the pedal concavo-convex portion 422b is disposed on the rear side of the pedal body portion 422 .

The pedal concavo-convex portion 422b is formed to have a shape corresponding to the handle-proximal concavo-convex portion 432b of the crossbar 430 . Accordingly, when the pedal 420 is rotated, the pedal concavo-convex portion 422b and the handle-proximal concavo-convex portion 432b of the crossbar 430 may be engaged and rotated together.

The pedal spring 423 provides a driving force for rotating the pedal body 422 .

A pedal coupling member 421 is coupled through the pedal spring 423 . In addition, the pedal spring 423 is in contact with one side of the pedal body 422 , and applies a force to the pedal body 422 .

The pedal spring 423 is formed of an elastic material. In addition, the pedal spring 423 is provided in any form that can store the restoring force by shape deformation and transmit the stored restoring force to the pedal body 422 . In the illustrated embodiment, the pedal spring 423 is provided in the form of a coil spring.

In a state in which a normal current is energized, the pedal body 422 is restrained by the nail 410 and the pedal spring 423 is compressed to store restoring force. Thereafter, when the pedal body 422 is released from the nail 410 , the restoring force of the pedal spring 423 is transmitted to the pedal body 422 to rotate the pedal body 422 .

The crossbar 430 is disposed between the pedal 420 and the handle 440 , and transmits the rotational motion of the pedal 420 to the handle 440 . To this end, the crossbar 430 is respectively connected to the pedal 420 and the handle 440 .

The crossbar 430 is positioned on the opposite side of the nail 410 with respect to the pedal 420 . In the illustrated embodiment, the crossbar 430 is located on the rear side of the pedal 420 .

When an overcurrent is applied to the circuit breaker 1 for wiring, the pedal 420 is released from the nail 410 and rotates clockwise, and the crossbar 430 connected to the pedal 420 also rotates clockwise. As a result, the handle 440 associated with the crossbar 430 is also rotated clockwise together.

Also, when the handle 440 is rotated counterclockwise by external pressure, the crossbar 430 connected to the handle 440 may also be rotated counterclockwise to return to an initial state.

In the illustrated embodiment, the crossbar 430 includes a crossbar rotation shaft 431 and a crossbar body portion 432 .

The crossbar rotation shaft 431 is coupled through the crossbar body 432 and the frame 100, respectively. In the illustrated embodiment, the crossbar rotation shaft 431 is coupled through the rear side of the crossbar body portion 432 .

In the illustrated embodiment, the crossbar rotation shaft 431 is formed in a cylindrical shape extending in the left and right directions.

The crossbar body portion 432 forms an external internal tooth body of the crossbar 430 .

The crossbar body 432 is rotatably coupled to the frame 100 about the crossbar rotation shaft 431 . Specifically, the crossbar body 432 may rotate clockwise or counterclockwise about the crossbar rotation shaft 431 .

The crossbar body 432 is connected to the pedal 420 and the handle 440 to transmit rotational motion between the pedal 420 and the handle 440 .

A pedal proximity uneven portion 432a is formed on one side of the crossbar body portion 432 , and a handle proximity uneven portion 432b is formed on the other side of the crossbar body portion 432 . In the illustrated embodiment, the pedal proximity uneven portion 432a is formed on the front side of the crossbar body portion 432 , and the handle proximity uneven portion 432b is formed on the rear side.

The pedal proximity uneven portion 432a is disposed adjacent to the pedal 420 . Specifically, the pedal proximity uneven portion 432a is disposed adjacent to the pedal uneven portion 422b. In the illustrated embodiment, the pedal proximity concavo-convex portion 432a is disposed on the front side of the crossbar body portion 432 .

The pedal proximity concavo-convex portion 432a is formed to have a shape corresponding to the pedal concavo-convex portion 422b. Accordingly, the pedal proximal concavo-convex portion 432a and the pedal concave-convex portion 422b may be engaged and coupled to each other. When the pedal concavo-convex portion 422b is rotated in a predetermined direction, the pedal proximity concave-convex portion 432a is also rotated in the predetermined direction.

The handle proximity concave-convex portion 432b is disposed adjacent to the handle 440 . In the illustrated embodiment, the handle proximity concave-convex portion 432b is disposed on the rear side of the crossbar body portion 432 .

The handle proximity concavo-convex portion 432b may be coupled to the handle 440 and rotate together with the handle 440 .

In an embodiment, the handle proximity concavo-convex portion 432b may be formed in a hook shape. Accordingly, the handle proximity concavo-convex portion 432b may be inserted and coupled to the depression formed in the handle 440 .

The handle 440 is a device for a user to manually trip the circuit breaker 1 when an overcurrent occurs. The handle 440 is rotated by an external force to allow or cut off electricity between the circuit breaker 1 for wiring and an external power source and a load.

The handle 440 is rotatably coupled to the frame part 100 . Also, the handle 440 may be connected to the pedal 420 and the crossbar 430 to rotate together.

That is, when the trip devices 500 and 600 strike the nail 410 , the nail 410 is rotated and the pedal 420 is released. At this time, as the released pedal 420 and crossbar 430 are rotated, the lever is rotated together with the pedal 420 and crossbar 430 so that the user can easily recognize the state of the circuit breaker 1 from the outside. let there be

Also, in the above state, when the handle 440 is pressed again and rotated, it returns to the initial state before the trip operation is performed. To this end, the handle 440 is rotatably coupled to the frame unit 100 in a direction toward the reset lever 450 or in a direction opposite to the reset lever 450 . When the handle 440 is rotated toward the reset lever 450 , the handle 440 collides with the reset lever 450 to press the reset lever 450 .

The handle 440 is partially exposed on the outside of the housing. The user can easily recognize the operating state of the circuit breaker 1 for wiring through the exposed portion of the handle 440 .

In addition, the user may determine whether to operate the circuit breaker 1 through the handle 440 . That is, the user may manipulate the handle 440 to adjust the state of the circuit breaker 1 for wiring to “ON”, “OFF” or “TRIP”.

In the illustrated embodiment, the handle 440 includes a handle engaging member 441 , a handle cam 442 , and a handle body portion 443 .

The handle coupling member 441 serves as a central axis when the handle 440 is rotated.

The handle coupling member 441 is inserted into the handle cam 442 and is connected to the handle cam 442 and the handle body portion 443 . Specifically, the handle cam 442 is rotatably coupled to the handle coupling member 441 .

In addition, the handle coupling member 441 rotatably couples the handle cam 442 to the frame part 100 . To this end, the handle coupling member 441 is coupled through the frame part 100 to be coupled to the frame part 100 . In summary, the handle coupling member 441 serves as a rotation shaft of the handle cam 442 .

In the illustrated embodiment, the handle engaging member 441 is disposed below the handle cam 442 .

The handle cam 442 generates a rotational motion in the handle body portion 443 spaced apart from the handle coupling member 441 .

The handle cam 442 is disposed between the handle coupling member 441 and the handle body portion 443 , and is coupled to the handle coupling member 441 and the handle body portion 443 , respectively. In the illustrated embodiment, the handle body 443 is disposed on the upper side of the handle cam 442 , and the handle coupling member 441 is disposed on the lower side of the handle cam 442 . That is, the handle body portion 443 , the handle cam 442 , and the handle coupling member 441 are sequentially disposed from the upper side to the lower side.

The handle cam 442 is engaged with the handle body 443 and rotates together with the handle body 443 during rotation.

In the illustrated embodiment, the handle cam 442 is formed in a bent plate shape. Specifically, the handle cam 442 may be divided into a central portion extending in the left and right direction and contacting the handle body portion 443 , and a wing portion extending downward from both sides of the central portion and into which the rotation shaft is inserted.

In the illustrated embodiment, a cam recessed portion 442a is formed on a lower side of the handle cam 442 , and a cam concave-convex portion 442b is formed on an upper side of the handle cam 442 .

A handle coupling member 441 is inserted into the cam depression 442a. Specifically, the cam recessed portion 442a is recessed in a direction opposite to the handle coupling member 441 at the lower side of the handle cam 442 . At this time, the cam depression 442a is formed in a shape corresponding to the handle coupling member 441 . Accordingly, the cam recessed portion 442a may be slid and rotated along the handle coupling member 441 .

In an embodiment not shown, the cam depression 442a may be replaced with a through hole formed in the handle cam 442 .

The cam concave-convex portion 442b is spaced apart from the cam recessed portion 442a and is disposed adjacent to the handle body portion 443 .

In the illustrated embodiment, the cam concavo-convex portion 442b is formed by alternately arranging concave portions and protrusions along the top of the handle cam 442 . At this time, the cam concavo-convex portion 442b is formed in a shape corresponding to the handle body portion 443 . Accordingly, the cam concavo-convex portion 442b and the handle body portion 443 may be engaged and coupled. Accordingly, when the cam concavo-convex part 442b rotates, it may rotate together with the handle body part 443 .

The handle body portion 443 forms the outer shape or body of the handle 440 .

The handle body 443 is coupled to the frame 100 to be rotatable about the handle coupling member 441 . In addition, the handle body portion 443 is rotatably connected to the handle coupling member 441 relatively.

The handle body 443 may be rotated in a direction toward the reset lever 450 or in a direction opposite to the reset lever 450 . When the handle body 443 is rotated in a direction toward the reset lever 450 , it may collide with the reset lever 450 .

A part of the handle body part 443 is exposed to the outside of the frame part 100 . Accordingly, the user can operate the circuit breaker 1 for wiring through the handle 440 .

In one embodiment, the handle body portion 443 may be curved and extended toward the front side or the rear side. That is, the handle body 443 may be formed to have an arc-shaped cross section having a predetermined curvature.

In the illustrated embodiment, the handle body portion 443 includes a handle portion 443a.

The handle portion 443a is formed to protrude from the upper end of the handle body portion 443 .

The handle portion 443a is exposed to the outside of the frame portion 100 . Accordingly, the user may grip the handle portion 443a and press it toward the front side or the rear side. That is, the user can easily operate the circuit breaker 1 for wiring.

In addition, in the illustrated embodiment, the lower end of the handle body portion 443 is formed with a body concavo-convex portion (443b). Specifically, the body concavo-convex portion 443b is formed by alternately disposing concave portions and protrusions along the lower end of the handle body portion 443 .

The body concavo-convex portion 443b is formed in a shape corresponding to the cam concave-convex portion 442b of the handle cam 442 . Accordingly, the body concavo-convex portion 443b and the cam concave-convex portion 442b may be engaged and coupled. Accordingly, when the rotation cam rotates, the handle body 443 may be rotated together with the rotation cam.

In addition, a lever proximity contact surface 443c may be formed on the front side of the handle body portion 443 .

The lever proximity contact surface 443c is a portion that collides with the reset lever 450 when the reset lever 450 is rotated.

The lever proximity contact surface 443c may be defined as a surface facing the reset lever 450 among surfaces of the handle body 443 .

The shape of the lever proximity contact surface 443c may be formed in any shape that can be rotated to press the reset lever 450 .

When the handle 440 is pressed to return the circuit breaker 1 for wiring from the trip state to the initial state, the lever proximity contact surface 443c collides with the reset lever 450 and may be pressed.

Hereinafter, the reset lever 450 will be described in more detail with reference to FIGS. 7 to 9 .

The reset lever 450 returns the trip devices 500 and 600 that have performed the trip operation to an initial state.

The reset lever 450 is rotatably coupled to the frame unit 100 in a direction toward the trip devices 500 and 600 or in a direction opposite to the trip devices 500 and 600 .

When the handle 440 is rotated toward the reset lever 450 , it may collide with the reset lever 450 to press the reset lever 450 . In the above process, when the reset lever 450 is rotated toward the trip devices 500 and 600 , it may collide with the trip devices 500 and 600 to pressurize the trip devices 500 and 600 .

In the illustrated embodiment, the reset lever 450 includes a lever coupling member 451 and a lever body portion 452 .

The lever coupling member 451 rotatably couples the lever body part 452 to the frame part 100 . Specifically, the lever coupling member 451 is through-coupled to the lever body portion 452 and the frame portion 100 , respectively. In the illustrated embodiment, the lever coupling member 451 passes through the lever body portion 452 and the frame portion 100 in the left and right directions.

In addition, the lever coupling member 451 serves as a rotation axis of the reset lever 450 . Specifically, the lever coupling member 451 serves as a rotation axis of the lever body portion 452 .

The lever body portion 452 forms the outer shape or body of the lever.

The lever body part 452 is coupled to the frame part 100 to be rotatable about the lever coupling member 451 as an axis. Specifically, the lever body 452 may be rotated in a direction toward the trip devices 500 and 600 or in a direction opposite to the trip devices 500 , 600 .

The lever body 452 may be rotated by being pressed by the handle 440 . Also, the lever body 452 may rotate and collide with the trip devices 500 and 600 and press the trip devices 500 , 600 .

In one embodiment, the lever body portion 452 may be formed with wing portions protruding to the left at the front end and the rear end, respectively.

In the illustrated embodiment, an inclined surface 452a is formed at the front side end of the lever body portion 452 , and a handle close contact surface 452b is formed at the rear side end.

The inclined surface 452a is a portion that collides with the trip devices 500 and 600 when the trip devices 500 and 600 return to their initial states. When the handle 440 is pressed to return the circuit breaker 1 from the trip state to the initial state, the inclined surface 452a collides with the trip devices 500 and 600 and presses the trip devices 500 and 600 .

The inclined surface 452a may be defined as a surface facing the trip devices 500 and 600 among surfaces of the lever body 452 . In the illustrated embodiment, the inclined surface 452a may be defined as a front upper surface of the lever body portion 452 .

The handle proximity contact surface 452b is a portion pressed by the handle 440 when the handle 440 is rotated. Specifically, the handle proximal contact surface 452b collides with the lever proximal contact surface 443c of the handle 440 and is pressed.

The handle proximity contact surface 452b may be defined as a surface of the lever body 452 facing the handle 440 . Also, the handle proximity contact surface 452b may be defined as a surface of the lever body 452 opposite to the trip devices 500 and 600 . That is, the handle proximity contact surface 452b is located on the opposite side of the inclined surface 452a with the lever coupling member 451 as the center.

In the illustrated embodiment, the handle proximal contact surface 452b may be defined as the rear upper surface of the lever body portion 452 .

When the user grips and presses the handle 440 , the lever proximity contact surface 443c of the handle 440 is rotated to collide with the handle proximity contact surface 452b of the reset lever 450 . The impacted handle proximal contact surface 452b is rotated about the lever engaging member 451 . At this time, the inclined surface 452a is also rotated together and collides with the trip devices 500 and 600 .

In one embodiment, the handle proximity contact surface 452b may be formed in a shape corresponding to the lever proximity contact surface 443c of the handle 440 .

2. Description of the trip device 500 according to an embodiment of the present invention

Hereinafter, a trip device 500 according to an embodiment of the present invention will be described with reference to FIGS. 10 to 19 .

The trip device 500 is operated by means for detecting when an overcurrent is applied to the circuit breaker 1 for wiring to perform a trip operation. That is, the trip device 500 substantially performs the role of the circuit breaker 1 for wiring.

The trip device 500 is rotatably coupled to the frame part 100 . Specifically, the trip device 500 may be rotated in a direction toward the nail 410 or in a direction opposite to the nail 410 . In this case, the trip device 500 may be rotated using the coupling protrusion 122 of the frame part 100 as a rotation axis.

The trip device 500 is coupled to the mechanism 400 . When one of trip device 500 and mechanism 400 is rotated, the other can also be rotated. That is, the handle 440 may be rotated by the trip operation of the trip device 500 , and the trip device 500 may be returned to an initial state by the rotation of the handle 440 .

The trip device 500 is positioned adjacent to the nail 410 . When the trip device 500 rotates in a direction toward the nail 410 , the nail 410 is pressed and the nail 410 is rotated. Accordingly, when the trip device 500 is rotated, the mechanism 400 including the handle 440 may be rotated.

Also, the trip device 500 that has performed the trip operation may be returned to an initial state by the reset lever 450 . The trip device 500 pressed by the reset lever 450 may be rotated in a direction opposite to the trip process to return to an initial state. A more detailed description thereof will be given later.

The trip device 500 may be formed of a material with high rigidity. For example, the trip device 500 may be formed of a metal material. This is to prevent the trip device 500 from being physically damaged when it collides with the nail 410 and the reset lever 450 .

The trip device 500 according to the present embodiment includes a shooter 510 and a pusher 520 .

The shooter 510 is a part that transmits rotational motion to the mechanism 400 when the trip device 500 performs a trip operation.

The shooter 510 may press the nail 410 . When an overcurrent is applied to the circuit breaker 1 for wiring, the shooter 510 presses the nail 410 and the mechanism 400 including the handle 440 is rotated so that the user can easily recognize the circuit breaker 1 for wiring. have.

Conversely, when the handle 440 is pressed back to the initial state by an external force, the shooter 510 pressing the nail 410 may return to the initial state. Accordingly, the nail 410 may also be returned to the initial state.

The shooter 510 is positioned adjacent to the nail 410 .

The shooter 510 is rotatably coupled to the frame part 100 in a direction toward the nail 410 or in a direction opposite to the nail 410 . Specifically, the shooter 510 is inserted and coupled to the coupling protrusion 122 of the frame part 100 .

The shooter 510 may be rotated clockwise or counterclockwise around the coupling protrusion 122 . When the shooter 510 is rotated toward the nail 410 , it collides with the shooter proximity contact portion 412a of the nail 410 and presses the nail 410 . The rotational movement of the shooter 510 is terminated when the pusher 520 is in close contact with the inner circumferential surface of the frame unit 100 . That is, the shooter 510 is limited in rotational movement by the pusher 520 and the frame unit 100 .

Conversely, when the reset lever 450 presses the shooter 510 , the shooter 510 is rotated in a direction opposite to the nail 410 . Accordingly, the shooter 510 may return to an initial state. The shooter 510 may be rotated until the pusher 520 comes into contact with the outer peripheral surface of the frame part 100 .

The shooter 510 may be formed in any shape capable of pressing the nail 410 .

In the illustrated embodiment, the shooter 510 includes a striking unit 511 , a reset unit 512 , a sliding bar 513 , and a cross section 514 .

The striking part 511 is a part where the shooter 510 and the nail 410 directly collide.

The striking unit 511 is formed at one end toward the nail 410 of the shooter 510 . The striking part 511 is formed to extend in a direction toward the nail 410 .

When the striking unit 511 rotates in a direction toward the nail 410 , it collides with the nail 410 and presses the nail 410 .

In the illustrated embodiment, the striking surface (511a) is formed on the rear side of the striking unit (511).

The striking surface 511a is a portion that presses the shooter close contact portion 412a of the nail 410 when the striking portion 511 is rotated.

The striking surface 511a may be defined as a surface facing the nail 410 among the surfaces of the striking unit 511 . In the illustrated embodiment, the striking surface (511a) may be defined as the rear side of the striking portion (511).

The shape of the striking surface 511a may be rotated and formed into any shape capable of pressing the nail 410 . In an embodiment, the striking surface 511a may be formed in a shape corresponding to the shooter proximity contact portion 412a of the nail 410 . In the illustrated embodiment, the striking surface (511a) is formed to be rounded so as to be convex in the direction toward the nail (410).

When the striking unit 511 is rotated in a direction toward the nail 410 , the striking surface 511a collides with the nail 410 . Specifically, the striking surface 511a collides with the shooter close contact portion 412a of the nail 410 . In the above process, the striking surface 511a presses the nail 410 and rotates the nail 410 . As a result, the pedal 420 connected to the nail 410, the crossbar 430, the handle 440, and the reset lever 450 are all rotated to perform a trip operation.

The reset unit 512 is a part that directly collides with the reset lever 450 when the shooter 510 that has performed the trip operation returns to its initial state.

The reset unit 512 is formed to protrude from one surface of the shooter 510 facing the reset lever 450 . In the illustrated embodiment, the reset unit 512 is formed to protrude from the left side of the shooter 510 .

When the reset lever 450 collides with the reset unit 512 , the reset unit 512 may be rotated along the inclined surface 452a of the reset lever 450 . That is, the shooter 510 may be rotated along the inclined surface 452a of the reset lever 450 .

In the illustrated embodiment, the reset unit 512 is formed to be rounded so as to be convex in a direction opposite to the reset lever 450 . In addition, in the above embodiment, the reset contact surface 512a is formed on the surface of the reset unit 512 facing the reset lever 450 .

The reset contact surface 512a is a portion in contact with the inclined surface 452a of the reset lever 450 when the reset lever 450 collides with the shooter 510 .

The reset contact surface 512a may be defined as a surface of the reset unit 512 facing the reset lever 450 . That is, the reset contact surface 512a faces the reset lever 450 . In the illustrated embodiment, the reset contact surface 512a may be defined as a rear lower surface of the reset unit 512 .

The shape of the reset contact surface 512a may be formed in any shape that can be slid along the inclined surface 452a of the reset lever 450 . In an embodiment, the reset contact surface 512a may be formed to have a shape corresponding to the inclined surface 452a of the reset lever 450 .

When the reset lever 450 is rotated toward the shooter 510 , the inclined surface 452a of the reset lever 450 collides with the reset contact surface 512a. The reset contact surface 512a colliding with the reset lever 450 slides along the inclined surface 452a of the reset lever 450 and rotates. The reset unit 512 on which the reset contact surface 512a is formed is also rotated and transmits rotational motion to the striking unit 511 and other components of the shooter 510 .

In summary, when the reset lever 450 and the reset contact surface 512a collide, the shooter 510 including the reset unit 512 is rotated. Accordingly, the shooter 510 that has performed the trip operation may return to the initial position.

The sliding bar 513 transmits the motion between the striking unit 511 and the cross section 514 .

The sliding bar 513 is positioned between the striking portion 511 and the cross section 514, and is coupled to the striking portion 511 and the cross section 514, respectively. That is, one end of the sliding bar 513 is coupled to the striking portion 511, the other end is coupled to the cross section (514). Specifically, the sliding bar 513 is coupled to one side opposite to the nail 410 of the striking unit 511 .

In the illustrated embodiment, the upper side of the sliding bar 513 is coupled to the striking portion 511, the lower side is coupled to the cross section (514). That is, the striking portion 511, the sliding bar 513, and the cross section 514 are sequentially arranged from the upper side to the lower side.

The sliding bar 513 is coupled to the striking unit 511 at a predetermined angle. The predetermined angle is preferably formed so that the striking unit 511 can collide with the nail 410 when the shooter 510 is rotated in the direction toward the nail 410 .

The sliding bar 513 may be rotated around the coupling protrusion 122 by inserting and coupling the coupling protrusion 122 . Specifically, the sliding bar 513 may be moved in a form in which a translational motion and a rotational motion are combined. A more detailed description thereof will be given later.

The sliding bar 513 stops when the pusher 520 is in close contact with the inner circumferential surface or the outer circumferential surface of the frame part 100 . That is, the movement of the sliding bar 513 is limited by the frame part 100 and the pusher 520 .

In an embodiment, the sliding bar 513 may be formed in a bar shape extending in one direction.

In the illustrated embodiment, the sliding bar 513 includes an inclined portion 513a, a straight portion 513b, and a coupling hole 513c.

The inclined portion 513a is formed at one end of the sliding bar 513 toward the striking portion 511 . In the illustrated embodiment, the inclined portion (513a) is formed to extend from the upper end of the sliding bar (513) toward the lower front end of the striking portion (511). That is, the inclined portion 513a extends from the upper end of the straight portion 513b while being inclined to the right.

The straight part 513b is a part directly coupled to the coupling protrusion 122 of the frame part 100 .

The straight part 513b is coupled to the lower side of the inclined part 513a. In addition, the straight portion 513b is formed to extend downward with respect to the inclined portion 513a.

In an embodiment, the straight part 513b may be disposed parallel to one surface of the frame part 100 facing the shooter 510 .

In the illustrated embodiment, a coupling hole 513c is formed through the straight portion 513b.

The coupling protrusion 122 of the frame part 100 is inserted into the coupling hole 513c. Therefore, the penetration direction of the coupling hole 513c is preferably the same as the extending direction of the coupling protrusion 122 .

The coupling hole 513c may be formed in any shape capable of striking the nail 410 while the shooter 510 is rotated.

In an embodiment, a cross-section of the coupling hole 513c may have an elliptical cross-section.

In the illustrated embodiment, the cross-section of the coupling hole 513c may be a rectangular cross-section in which corners are rounded and chamfered. In addition, in the above embodiment, the coupling hole 513c extends in the same direction as the extending direction of the sliding part.

Accordingly, the coupling protrusion 122 may be slid along the coupling hole 513c. That is, the sliding bar 513 coupled to the coupling protrusion 122 may be rotated while sliding with respect to the coupling protrusion 122 . In other words, the sliding bar 513 may be moved in a form in which a translational motion and a rotational motion are combined.

In the embodiment shown in FIG. 16 , the width of a portion adjacent to the coupling hole 513c of the sliding bar 513 is greater than the width of the remaining portion of the sliding bar 513 .

As the width of the part increases, the cross-sectional area of the part also increases, and the stress applied to the part decreases in inverse proportion to the cross-sectional area. Accordingly, the occurrence of deformation and breakage of the sliding bar 513 including the one portion may also be reduced.

The crosspiece 514 transmits motion between the sliding bar 513 and the pusher 520 .

The transverse portion 514 is coupled to one side opposite to the striking portion 511 of the sliding bar 513 . In the illustrated embodiment, the cross section 514 is coupled to the lower side of the sliding bar (513).

The cross section 514 may be formed in a cylindrical shape extending in a predetermined direction. The predetermined direction means a direction different from the extending direction (the one direction) of the sliding bar 513 . In the illustrated embodiment, the crosspiece 514 extends in the left-right direction.

In addition, the cross section 514 may extend at a predetermined angle with the sliding bar 513 . In an embodiment, the predetermined angle may be a right angle.

The crosspiece 514 is rotatably coupled to the pusher 520 . Specifically, the crosspiece 514 is coupled through the pusher 520 .

In one embodiment, the surface of the run may be polished. This is to more smoothly rotate the cross section 514 inserted into the pusher 520 .

The pusher 520 rotates the shooter 510 by being pressurized by the arc gas during the blocking operation of the circuit breaker 1 for wiring.

One side of the pusher 520 is disposed outside the frame part 100 , and the other side is disposed inside the frame part 100 . In the illustrated embodiment, the front side of the pusher 520 is disposed outside the frame part 100 , and the rear side is disposed inside the frame part 100 .

The pusher 520 is coupled through the frame part 100 . Specifically, the pusher 520 passes through the receiving portions 111 and 121 of the frame portion 100 . That is, the pusher 520 is inserted and coupled to the receiving portions 111 and 121 of the frame portion 100 .

A cross section 514 is inserted and coupled to the pusher 520 in a relatively rotatable manner. Accordingly, when the pusher 520 is translated, the shooter 510 including the crosspiece 514 may be rotated clockwise or counterclockwise.

During the blocking operation of the circuit breaker 1 for wiring, arc gas is generated in the inner space of the frame part 100 . In the above process, the pusher 520 is pressed by the arc gas and moved along the receiving portions 111 and 121 of the frame portion 100 . Accordingly, the shooter 510 coupled to the pusher 520 is rotated and a trip operation may be performed.

In addition, when the handle 440 is rotated and the reset lever 450 is pressed, the shooter 510 is rotated in a direction opposite to the trip process, and the pusher 520 coupled with the shooter 510 is returned to its initial state. can

The pusher 520 moves along the receiving portions 111 and 121 of the frame portion 100 , and moves along the penetrating direction of the receiving portions 111 and 121 . In the illustrated embodiment, the pusher 520 is moved in the front-rear direction.

However, the pusher 520 cannot move infinitely, and its movement is limited by the frame unit 100 . Specifically, when the pusher 520 is in close contact with the outer circumferential surface or the inner circumferential surface of the frame part 100 , the movement of the pusher 520 is terminated. A detailed description thereof will be provided later.

In the illustrated embodiment, the pusher 520 includes a bearing part 521 , a connection part 522 , and a pressure plate 523 .

The bearing part 521 is disposed outside the frame part 100 . Specifically, the bearing part 521 is disposed adjacent to the outer peripheral surface of the frame part 100 .

The bearing portion 521 is rotatably coupled to the horizontal portion 514 . In addition, the bearing part 521 is disposed to surround the horizontal part 514 of the shooter 510 .

During the trip process, the bearing part 521 is moved in a direction away from the outer peripheral surface of the frame part 100 . In the process of returning after the trip operation is performed, the bearing part 521 is moved toward the outer peripheral surface of the frame part 100 . In the above process, when the bearing part 521 is in contact with the outer peripheral surface of the frame part 100 , the movement of the pusher 520 including the bearing is stopped.

The bearing part 521 is formed in a cylindrical shape. The bearing part 521 extends in the same direction as the extension direction of the cross-beam part 514 . In the illustrated embodiment, the bearing portion 521 extends in the left-right direction.

In the illustrated embodiment, a hollow portion 521a is formed in the center of the bearing portion 521 .

The hollow portion 521a is a space into which the horizontal portion 514 of the shooter 510 is inserted.

The hollow part 521a is formed to extend in the same direction as the extension direction of the bearing part 521 . In the illustrated embodiment, the hollow portion 521a extends in the left-right direction. Each end of the hollow portion 521a is formed to be open, respectively, and communicates with the outside.

The hollow portion 521a may be formed to have a shape corresponding to the horizontal portion 514 . In the illustrated embodiment, the cross-section of the hollow portion 521a is formed by extending in the left-right direction with a circular cross-section.

The connection part 522 transmits motion between the bearing part 521 and the pressure plate 523 .

The connection part 522 is disposed between the bearing part 521 and the pressure plate 523 , and is coupled to the bearing part 521 and the pressure plate 523 , respectively. That is, the bearing part 521 , the connection part 522 , and the pressure plate 523 are sequentially arranged in a predetermined direction. In the illustrated embodiment, the bearing portion 521 , the connecting portion 522 and the pressing plate 523 are sequentially disposed from the front to the rear.

The connection part 522 is coupled through the frame part 100 . Specifically, the connection part 522 is inserted into the receiving parts 111 and 121 of the frame part 100 . In this case, one side of the connection part 522 is disposed outside the frame part 100 , and the other side is disposed inside the frame part 100 . In the illustrated embodiment, the one side refers to the front side, and the other side refers to the rear side.

The connection part 522 is formed so that a predetermined cross-section extends along the receiving parts 111 and 121 of the frame part 100 . It is preferable that the cross-sectional area of the predetermined cross-section is smaller than the cross-sectional area of the receiving portions 111 and 121 of the frame part 100 .

The connection part 522 extends in the same direction as the receiving parts 111 and 121 of the frame part 100 . In addition, the connection part 522 extends in a direction different from the extension direction of the bearing part 521 . That is, the extension direction of the connection part 522 and the extension direction of the bearing part 521 cross at a predetermined angle.

In an embodiment, the surface of the connection part 522 may be polished. This is for smooth movement of the connection part 522 .

A pressure plate 523 is disposed on the opposite side of the bearing part 521 with the connection part 522 as the center.

The pressure plate 523 is a part in direct contact with the arc gas generated during the blocking operation.

The pressing plate 523 is disposed inside the frame part 100 . When an arc is generated in the inner space of the frame part 100 , the pressure plate 523 is pressed and moved by the arc gas. Specifically, the pressing plate 523 is moved along the receiving portions 111 and 121 of the frame portion 100 . In the above process, when the pressure plate 523 comes into contact with the inner circumferential surface of the frame part 100 , the movement of the pressure plate 523 is stopped.

At this time, the pressure plate 523 is in close contact with the inner circumferential surface of the frame part 100 , and the receiving parts 111 and 121 of the frame part 100 are blocked by the pressure plate 523 . Accordingly, the gas and the insulating material generated in the internal space of the frame part 100 may be prevented from being discharged to the external space through the accommodating parts 111 and 121 .

Accordingly, contamination of the circuit breaker 1 for wiring due to the leaked carbonized material can also be reduced. In particular, contamination of the insulating material configuration of the circuit breaker 1 for wiring can be prevented.

Furthermore, the insulation function of the circuit breaker 1 for wiring is improved, and the possibility of malfunction can be further reduced.

The pressing plate 523 may be formed in a plate shape. In an embodiment, the pressure plate 523 may be formed parallel to the inner circumferential surface of the frame part 100 .

It is preferable that the cross-sectional area of the pressing plate 523 is larger than the cross-sectional area of the receiving portions 111 and 121 of the frame part 100 . This is to block the receiving portions 111 and 121 of the frame portion 100 with high reliability when the pressure plate 523 is in close contact with the inner circumferential surface of the frame portion 100 .

In an embodiment, a concave portion (not shown) that is depressed in a direction opposite to the pressure plate 523 may be formed on a portion of the pressure plate 523 adjacent to the inner circumferential surface of the frame portion 100 . The concave portion may be formed in a shape corresponding to the pressing plate 523 .

Accordingly, the pressure plate 523 in close contact with the inner circumferential surface of the frame part 100 may be more stably seated on the inner circumferential surface of the frame part 100 . In addition, the pusher 520 may guide the movement direction so as not to derail in the designed movement direction. Furthermore, the receiving portions 111 and 121 of the frame portion 100 may be more easily blocked.

In one embodiment, the pressure plate 523 may be formed of an elastic material. This is for the pressure plate 523 and the inner peripheral surface of the frame part 100 to be in close contact with improved reliability.

In the illustrated embodiment, a frame adjacent surface 523a is formed on one side of the pressing plate 523 , and a pressing surface 523b is formed on the other side of the pressing plate 523 .

The frame adjacent surface 523a may be defined as a surface facing the connecting portion 522 of the pressure plate 523 . That is, the frame adjacent surface 523a is positioned adjacent to the connecting portion 522 . In the illustrated embodiment, the frame abutting surface 523a may be defined as the front side of the platen 523 .

In an embodiment, the frame adjacent surface 523a may be formed parallel to the inner peripheral surface of the frame part 100 .

When the pressure plate 523 is moved toward the inner circumferential surface of the frame part 100 , the frame adjacent surface 523a may be in close contact with the inner circumferential surface of the frame part 100 .

In an embodiment, a portion of the inner circumferential surface of the frame part 100 in contact with the frame adjacent surface 523a may be formed to have a shape corresponding to the frame adjacent surface 523a.

The pressing surface 523b is a portion that is pressurized by the arc gas in the trip process. The pressing surface 523b is pressurized by the gas generated in the inner space of the frame part 100 .

The pressing surface 523b may be defined as a surface opposite to the connecting portion 522 of the pressing plate 523 . That is, the pressing surface 523b may be defined as a surface opposite to the frame adjacent surface 523a among the surfaces of the pressing plate 523 . In the illustrated embodiment, the pressing surface 523b may be defined as the rear side of the pressing plate 523 .

When the arc gas generated during the blocking operation of the circuit breaker 1 collides with the pressing surface 523b, the pressing plate 523 having the pressing surface 523b is formed along the receiving portions 111 and 121 of the frame part 100 along the is exercised Accordingly, the shooter 510 coupled with the pusher 520 may rotate and perform a trip operation.

3. Description of the trip device 600 according to another embodiment of the present invention

Referring back to FIGS. 1 to 3 , the circuit breaker 1 for wiring according to an embodiment of the present invention includes a trip device 600 .

The trip device 600 according to the present embodiment corresponds to the trip device 500 according to the above-described embodiment in function and structure. However, the trip device 600 according to the present embodiment is different from the trip device 500 according to the above-described embodiment in some components.

Specifically, the trip device 600 according to the present embodiment is different from the trip device 500 according to the above-described embodiment in that the shooter 610 and the pusher are integrally formed without being divided into separate components. have.

Hereinafter, the trip device 600 according to the present embodiment will be described with reference to FIGS. 20 and 21 , focusing on differences from the trip device 500 according to the above-described embodiment.

The trip device 600 according to the present embodiment includes a shooter 610 .

In the illustrated embodiment, the shooter 610 includes a striking unit 611 , a reset unit 612 , a sliding bar 613 , a cross section 614 , a connection unit 615 , and a pressure plate 616 .

Among the components, the striking unit 611, the reset unit 612, and the pressing plate 616 are the striking unit 511, the reset unit 512 and the pressing plate 523 according to the above-described embodiment and their structures, functions, and The bonding structure and the like are the same. Further, the pressure plate 616 includes a frame adjacent surface 616a and a pressing surface 616b, and each component includes the frame adjacent surface 523a and the pressing surface 523b according to the above-described embodiment and its structure; The function and the bonding structure are the same.

The sliding bar 613 has almost the same structure and function as the sliding bar 513 according to the above-described embodiment. However, the sliding bar 613 according to the present embodiment is different in that the movement is stopped when the cross section 614 is in close contact with the outer circumferential surface of the frame part 100 .

Also, the sliding bar 613 according to the present embodiment is different in that it can be rotated without being translated.

The sliding bar 613 includes an inclined part 613a, a straight part 613b, and a coupling hole 613c, and each component is an inclined part 531a, a straight part 513b and a coupling according to the above-described embodiment. The hole 513c has the same structure, function, and coupling structure as the hole 513c.

The cross section 614 has the same structure and function as the cross section 514 according to the above-described embodiment. However, the cross section 614 according to the present embodiment is different in that it is disposed adjacent to the outer circumferential surface of the frame part 100 and can be in contact with the outer circumferential surface of the frame part 100 .

In the process of returning the circuit breaker 1 for wiring from a tripped state, the cross section 614 is rotated toward the frame portion 100 . When the cross section 614 is in contact with the outer circumferential surface of the frame part 100, the rotational movement is stopped. That is, the rotational motion of the cross section 614 is limited by the frame section 100 .

The connection unit 615 has the same structure and function as the connection unit 522 according to the above-described embodiment. However, the connection part 615 according to the present embodiment is different in that it is curved and extended in a direction from the horizontal part 614 to the striking part 611 .

The connection part 615 is inserted into the receiving parts 111 and 121 of the frame part 100 . Accordingly, the accommodating portions 111 and 121 of the frame portion 100 are also formed to extend and have a predetermined cross-section curved at the same curvature as that of the connecting portion 615 .

The connecting portion 615 is disposed between the crosspiece 614 and the pressure plate 616 and is coupled to the crosspiece 614 and the pressure plate 616 , respectively. That is, the horizontal portion 614 , the connecting portion 615 , and the pressing plate 616 are sequentially arranged in a predetermined direction. In the illustrated embodiment, the crosspiece 614 , the connecting portion 615 , and the pressure plate 616 are sequentially disposed from the front to the rear. Accordingly, the connecting portion 615 may transmit motion between the crosspiece 614 and the pressure plate 616 .

4. Description of the process in which the trip operation and the return operation are performed in the trip devices 500 and 600 and the circuit breaker 1 including the same according to an embodiment of the present invention

Hereinafter, a trip operation and a return operation of the trip devices 500 and 600 according to an embodiment of the present invention will be described with reference to FIGS. 22 to 24 . However, the rotation direction of each component will be understood with reference to FIGS. 22 and 24 .

First, a trip operation of the trip devices 500 and 600 will be described with reference to FIGS. 22 and 23 . 22A and 23A show the circuit breaker 1 in a state before the trip operation is performed, and FIGS. 22B and 23B show the circuit breaker 1 in a state in which the trip operation is performed.

When the circuit breaker 1 for wiring is in a blocking operation, the movable contact 222 is separated from the fixed contact 212 and an arc is generated. The generated arc gas collides with the pressure plates 523 and 616 and presses the pressure plates 523 and 616 to the front side. When the pressure plates 523 and 616 are moved to the front side, the connecting portions 522 and 615 connected to the pressure plates 523 and 616 are also moved to the front side.

The connection part 522 according to an embodiment of the present invention is moved forward together with the bearing part 521 . Accordingly, the transverse portion 514 rotatably coupled to the bearing portion 521 of the pusher 520 is rotated counterclockwise around the coupling protrusion 122 .

The connection part 615 according to another embodiment of the present invention is rotated around the coupling protrusion 122 and is moved to the front side. Accordingly, the cross section 614 coupled to the front side of the connecting section 615 is also rotated counterclockwise.

In summary, the transverse parts 514 and 614 according to the embodiment of the present invention are rotated counterclockwise as the connecting parts 522 and 615 are moved to the front side.

The transverse portion (514, 614) is connected to the sliding bar (513, 613) and the striking portion (511, 611), the sliding bar (513, 613) and the striking portion (511, 611) also a coupling protrusion (122) rotates counterclockwise around the center. Accordingly, the striking surfaces 511a and 611a of the striking units 511 and 611 may collide with the shooter proximity contact portion 412b of the nail 410 .

The nail 410 pressed by the striking parts 511 and 611 of the shooters 510 and 610 is rotated counterclockwise. Accordingly, the pedal 420 may be released from the nail 410 and rotate clockwise. As a result, the crossbar 430 and the handle 440 connected to the pedal 420 may also be rotated clockwise.

Through the above description, it can be confirmed that the trip devices 500 and 600 and the components of the mechanism 400 are sequentially connected and the trip process is performed. In the trip devices 500 and 600 according to an embodiment of the present invention, the coupling between the components and the components of the mechanism 400 may be stably maintained. Accordingly, the reliability of the trip operation may be further improved.

Hereinafter, an operation of returning the trip devices 500 and 600 from the trip state to the initial state will be described with reference to FIG. 24 . 24A shows the trip devices 500 and 600 in a state in which a trip operation is performed, and FIG. 24B shows the trip devices 500 and 600 returned to an initial state.

In a state in which the circuit breaker 1 for wiring is tripped, the user grips the handle portion 443a of the handle 440 and presses it forward. Accordingly, the handle 440 is rotated clockwise about the handle coupling member 441 .

When the handle 440 is rotated clockwise, the lever proximal contact surface 443c of the handle 440 collides with the handle proximal contact surface 452b of the reset lever 450 . That is, the handle 440 presses the rear side of the reset lever 450 .

The pressed reset lever 450 is rotated counterclockwise to collide with the reset units 512 and 612 of the shooters 510 and 610 . Specifically, the inclined surface 452a of the reset lever 450 collides with the reset contact surfaces 512a and 612a of the shooters 510 and 610 . In the above process, the reset units 512 and 612 of the shooters 510 and 610 slide along the inclined surface 452a of the reset lever 450 and rotate clockwise.

As a result, the pressure plates 523 and 616 connected to the reset units 512 and 612 are moved to the rear side. That is, the pressure plates 523 and 616 are moved in a direction opposite to the trip process, and returned to their initial state.

In the trip devices 500 and 600 according to an embodiment of the present invention, a return spring is not separately required when a return operation is performed. Accordingly, deterioration of the return spring and malfunction of the trip devices 500 and 600 due to this can be prevented. Furthermore, the return operation of the trip devices 500 and 600 can be performed with higher reliability.

Although the above has been described with reference to the preferred embodiment of the present invention, the present invention is not limited to the configuration of the above-described embodiments.

In addition, the present invention can be variously modified and changed by those of ordinary skill in the art to which the present invention pertains without departing from the spirit and scope of the present invention as set forth in the claims below.

Furthermore, the embodiments may be configured by selectively combining all or part of each embodiment so that various modifications can be made.

1: Breaker for wiring
10: single pole blocking unit
100: frame part
110: left frame
111: left receiving part
120: right frame
121: right receiving part
122: coupling protrusion
200: current unit
210: fixed terminal unit
211: fixed contact point
212: fixed contact
220: movable terminal unit
221: movable contact point
222: movable contact
230: rotation shaft
300: arc (arc) extinguishing unit
400: mechanism
410: nail (nail)
411: nail rotation axis
412: nail body portion
412a: shooter close contact
412b: pedal close contact
420: pedal
421: pedal coupling member
422: pedal body
422a: nail close contact
422b: pedal uneven portion
423: pedal spring
430: crossbar
431: crossbar rotation axis
432: crossbar body portion
432a: pedal proximal concavo-convex
432b: handle proximity irregularities
440: handle
441: handle engaging member
442: handle cam
442a: cam depression
442b: cam irregularities
443: handle body portion
443a: handle part
443b: body irregularities
443c: lever proximate contact surface
450: reset lever
451: lever coupling member
452: lever body
452a: inclined plane
452b: handle close contact surface
500: a trip device according to an embodiment of the present invention
510: shooter
511: hitting unit
511a: striking surface
512: reset unit
512a: reset contact surface
513: sliding bar
513a: inclined portion
513b: straight part
513c: mating hole
514: cross section
520: pusher (pusher)
521: bearing part
521a: hollow
522: connection
523: platen
523a: frame proximal surface
523b: pressure side
600: Trip device according to another embodiment of the present invention
610: shooter
611: striking part
611a: striking face
612: reset unit
612a: reset contact surface
613: sliding bar
613a: inclined portion
613b: straight part
613c: mating hole
614: cross section
615: connection
616: platen
616a: frame proximal side
616b: pressure side

Claims (21)

a frame having a space formed therein, and a coupling protrusion protruding from an outer circumferential surface;
a nail rotatably coupled to the frame to perform a trip operation; and
a trip device positioned adjacent to the nail, rotatably coupled to the frame in a direction toward the nail or in a direction opposite to the nail, and provided with a shooter and a pusher;
The shooter is
a sliding bar extending in one direction, having a coupling hole through which the coupling protrusion is inserted, and rotatably coupled to the frame with the coupling protrusion as an axis;
a striking unit coupled to one end of the sliding bar toward the nail and collides with the nail when the trip device rotates in a direction toward the nail; and
It is coupled to the other end opposite to the one end of the sliding bar, and includes a transverse portion extending in a direction different from the one direction,
The pusher is
Through-coupled to the frame, the cross section is relatively rotatably through-coupled to one side disposed outside the frame, the one side and the other side are disposed inside the frame,
circuit breaker for wiring. According to claim 1,
a reset lever coupled to the frame rotatably in a direction facing the shooter or in a direction opposite to the shooter; and
and a handle coupled to the frame to be rotatably coupled to the frame in a direction facing the reset lever or in a direction opposite to the reset lever, and which collides with a portion of the reset lever when rotated in the direction toward the reset lever,
The shooter is
a reset unit protruding from one surface of the shooter facing the reset lever, provided with a reset contact surface facing the reset lever, and rounded to be convex in a direction opposite to the reset lever;
The other part opposite to the part of the reset lever is,
An inclined surface colliding with the reset contact surface is provided when the reset lever is rotated in a direction toward the shooter,
circuit breaker for wiring. 3. The method of claim 2,
The handle is
a lever proximity contact surface that collides with the portion of the reset lever when the handle is rotated in a direction toward the reset lever;
In the part of the reset lever,
A handle proximity contact surface formed in a shape corresponding to the lever proximity contact surface is formed,
circuit breaker for wiring. According to claim 1,
The pusher is
a bearing portion disposed on the outside of the frame, formed in a cylindrical shape, and through which the cross section is rotatably coupled therein;
a pressure plate disposed inside the frame and formed in a plate shape; and
It is positioned between the bearing portion and the pressure plate, each coupled to the bearing portion and the pressure plate, comprising a connection portion that is coupled through the frame,
circuit breaker for wiring. 5. The method of claim 4,
The frame is
A receiving part into which the connection part is inserted is formed through,
The cross-sectional area of the receiving part is,
formed larger than the cross-sectional area of the connection part,
circuit breaker for wiring. 6. The method of claim 5,
The cross-sectional area of the receiving part is,
Formed smaller than the cross-sectional area of the pressing plate,
circuit breaker for wiring. 5. The method of claim 4,
The inner peripheral surface of the frame,
A portion positioned adjacent to the pressure plate is recessed in a direction opposite to the pressure plate, and is formed in a shape corresponding to the pressure plate,
circuit breaker for wiring. 5. The method of claim 4,
The surface of the cross section and the surface of the connection part are polished,
circuit breaker for wiring. 5. The method of claim 4,
The pressure plate is formed of an elastic material,
circuit breaker for wiring. According to claim 1,
The hitting unit,
When the shooter is rotated in a direction toward the nail, a striking surface that collides with the nail is provided;
The nail is
When the shooter is rotated in the direction toward the nail, a shooter close contact portion that collides with the striking surface is provided,
The shooter close contact portion,
Located adjacent to the striking surface, formed in a shape corresponding to the striking surface,
circuit breaker for wiring. According to claim 1,
The width of a portion adjacent to the coupling hole of the sliding bar is,
formed larger than the width of the remaining part of the sliding bar,
circuit breaker for wiring. a frame having a space for accommodating the current-carrying unit therein, and having a coupling protrusion protruding from an outer circumferential surface;
a nail rotatably coupled to the frame to perform a trip operation; and
and a shooter positioned adjacent to the nail and rotatably coupled to the frame in a direction toward the nail or in a direction opposite to the nail,
The shooter is
a sliding bar formed in a columnar shape extending in one direction, including a coupling hole into which the coupling protrusion is inserted, and rotatably coupled to the frame based on the coupling protrusion;
a striking part coupled to one end of the sliding bar adjacent to the nail and collided with the nail when the shooter is rotated in a direction toward the nail;
a transverse portion disposed outside the frame, coupled to the other end opposite to the one end of the sliding bar, and extending in a direction different from the one direction;
a pressure plate disposed inside the frame and formed in a plate shape; and
It is positioned between the cross section and the pressure plate, is coupled to the cross section and the pressure plate, respectively, is curved and extended in a direction from the cross section toward the striking portion, and includes a connecting portion that is coupled through the frame,
circuit breaker for wiring. 13. The method of claim 12,
a reset lever coupled to the frame rotatably in a direction facing the shooter or in a direction opposite to the shooter; and
and a handle coupled to the frame to be rotatably coupled to the frame in a direction facing the reset lever or in a direction opposite to the reset lever, and which collides with a portion of the reset lever when rotated in the direction toward the reset lever,
The shooter is
a reset unit protruding from one surface of the shooter facing the reset lever, provided with a reset contact surface facing the reset lever, and rounded to be convex in a direction opposite to the reset lever;
The other part opposite to the part of the reset lever is,
An inclined surface colliding with the reset contact surface is provided when the reset lever is rotated in a direction toward the shooter,
circuit breaker for wiring. 14. The method of claim 13,
The handle is
a lever proximity contact surface that collides with the portion of the reset lever when the handle is rotated in a direction toward the reset lever;
In the part of the reset lever,
A handle proximity contact surface formed in a shape corresponding to the lever proximity contact surface is formed,
circuit breaker for wiring. 13. The method of claim 12,
The frame is
A receiving part into which the connection part is inserted is formed through,
The cross-sectional area of the receiving part is,
formed larger than the cross-sectional area of the connection part,
circuit breaker for wiring. 16. The method of claim 15,
The cross-sectional area of the receiving part is,
Formed smaller than the cross-sectional area of the pressing plate,
circuit breaker for wiring. 13. The method of claim 12,
The inner peripheral surface of the frame,
A portion positioned adjacent to the pressure plate is recessed in a direction opposite to the pressure plate, and is formed in a shape corresponding to the pressure plate,
circuit breaker for wiring. 13. The method of claim 12,
The surface of the connection part is polished,
circuit breaker for wiring. 13. The method of claim 12,
The pressure plate is formed of an elastic material,
circuit breaker for wiring. 13. The method of claim 12,
The hitting unit,
When the shooter is rotated in a direction toward the nail, a striking surface that collides with the nail is provided;
The nail is
When the shooter is rotated in the direction toward the nail, a shooter close contact portion that collides with the striking surface is provided,
The shooter close contact portion,
Located adjacent to the striking surface, formed in a shape corresponding to the striking surface,
circuit breaker for wiring. 13. The method of claim 12,
The width of a portion adjacent to the coupling hole of the sliding bar is,
formed larger than the width of the remaining part of the sliding bar,
circuit breaker for wiring.

Images