KR102088926B1 - electric attraction rotate type circuit breaker - Google Patents

Abstract

The present invention relates to a suction rotary type circuit breaker capable of improving driving reliability by rapidly blocking a current flow when an overcurrent occurs. The suction rotary type circuit breaker of the present invention comprises: a housing unit; a movable switching unit; a crossbar; a trip unit; a latch unit configured to press the crossbar downwardly; a handle unit having a pressing member connected to a lower end portion thereof; and a suction rotation device including a suction link unit and an interworking link unit, wherein the suction link unit includes a suction unit and an interworking rotation unit.

Description

{Electric attraction rotate type circuit breaker}

The present invention relates to a suction rotation type circuit breaker, and more particularly, to a suction rotation type circuit breaker with improved driving reliability by quickly blocking the flow of current when an overcurrent occurs while the configuration is simplified.

In general, the circuit breaker prevents damage to electrical products and lines connected to the load side by rapidly switching the opening and closing operation of the electric line when an overcurrent exceeding a set value or a short circuit occurs in the circuit to block the flow of current. Device. Such a circuit breaker is driven by manual or automatic operation, and preferably can be operated to automatically short circuit the current when an overcurrent occurs.

Here, in the related art, a bimetal type circuit breaker using a property in which two metal plates having different thermal expansion coefficients are attached and bend to a smaller thermal expansion rate when heat due to overcurrent is applied. In a bimetal circuit breaker, when a current is supplied to a circuit, a resistance is generated to heat the bimetal, and when an excess current of a certain level or more flows, the bimetal is bent and drives a trip portion that is in close contact. In addition, the contact terminal coupled to the lower portion of the bimetal is driven with a structure in which the flow of current is cut off by being separated from the input terminal.

However, the conventional bimetal type circuit breaker has a problem in that it does not immediately cut off the current and is delayed due to the time during which the bimetal is deformed. Moreover, as the speed at which the current is cut off is relatively delayed, there is a problem in that the components inside the circuit breaker as well as the electrical products connected to the load side and the line may be damaged.

Accordingly, in some cases, a circuit breaker of an image current transformer method that controls a trip bar to be driven through a signal transmitted when an overcurrent occurs is disclosed. However, such a video current transformer type circuit breaker has a problem in that the manufacturing cost and the manufacturing cost of the circuit breaker itself increase because it includes complicated and expensive parts such as the video current transformer, solenoid part, and printed circuit board. In addition, since complicated parts are densely installed inside the breaker, manufacturing difficulty increases, and there is a problem in that malfunction occurs due to excessively adjacent parts.

Korean Utility Model No. 20-0341427

In order to solve the above problems, the present invention solves the problem of providing a suction rotating circuit breaker with improved driving reliability by blocking current flow rapidly when an overcurrent occurs while the configuration is simplified.

In order to solve the above problems, the present invention, the power input unit and the load output unit is provided with a housing spaced apart at the front and rear sides; It is disposed between the power input unit and the load output unit, and the front end is connected to the power input unit to provide elastic recovery force to the upper side so as to be selectively spaced apart, and the rear end portion is formed with a magnetization facing portion formed in a portion extending in the upward direction. Switching unit; A crossbar formed on one side via a transverse opening which is opened such that the front end side of the movable switching portion is transverse, but supported by an elastic means provided at the lower end, and supported by a cross bar; A trip unit disposed opposite to the rear side of the magnetization facing portion and rotated back and forth around the lower end portion, but having an inclined step forward in the front portion; A front end portion facing the upper surface of the crossbar, but a rear end portion in contact with the upper surface of the inclined step so that the power input portion and the movable switching portion are in contact with each other; a latch portion for pressing the crossbar downward; A handle portion coupled to the housing portion to be rotated back and forth, and a pressing member connected to a lower portion to move upward and downward to press the latch portion downward according to a rotation direction; And a suction link part that is sucked and rotated in one direction around a rotation support part connected to the rear side of the trip part by the suction magnetic force generated in the magnetization facing part when an overcurrent occurs, and the rotation support part is connected to the suction link part in the form of a two-stage lever. It includes a suction rotation device including a linkage link for rotating the other side of the trip portion to retract the trip by pressing the handle mounting portion fixed to the housing portion so as to be spaced apart from the inclined step and the latch portion is rotated in the other direction to the center, The rotation support portion includes a first rotation axis and a second rotation axis spaced apart from each other at predetermined intervals, and the suction link portion is made of a magnetic material, but is disposed to face the rear surface of the magnetization facing portion. A portion is bently connected to the suction portion, but is generated in the magnetization-facing portion. Including the interlocking rotating portion is hinged to the inner end surrounding the outer surface of the first rotating shaft so as to rotate in one direction around the first rotating shaft by the suction magnetic force, the interlocking link portion is hinged to the second rotating shaft, the suction Provides a suction rotating circuit breaker characterized in that the link protrusion is linked to the inner end of the interlocking rotation part so that the link part rotates in the other direction when the link part rotates in one direction, and the protruding protrusion extends to the outer periphery so as to be pressed in a line contact with the handle mounting part. do.

Through the above solution, the suction rotation type circuit breaker according to the present invention provides the following effects.

First, when the suction part of the suction rotating device is disposed opposite to the magnetizing face portion where suction magnetic force is generated when an overcurrent flows, when it is instantaneously rotated in one direction around the rotating support part, it is linked to it and the pressurized protrusion amplified by the two-stage lever structure It is possible to be provided with a circuit breaker having a faster current blocking speed than a bimetal that is bent through a conventional resistance heat by rotating the other direction to press the handle mounting portion and quickly retract the trip portion.

Second, the distance between the first rotation axis and the first rotation axis at the outer end of the suction part is formed longer than the distance between the first rotation axis and the second rotation axis, and the distance between the second rotation axis at the outer end of the link protrusion is second at the outer end of the pressure protrusion. It is formed shorter than the distance between the rotating shafts, so that when the overcurrent occurs, the suction magnetic force of the magnetizing face portion is amplified in two stages by the pressing force of the pressure protrusion for retracting the trip portion to the rear side by the lever principle, so the operational accuracy for instantaneous current blocking can be significantly improved. .

Third, since the link protrusion protrudes downwardly to the interlocking link portion hinged to the second rotating shaft and is linked to the inner end of the suction link portion hinged to the first rotating shaft, the distance between the first rotating shaft and the second rotating shaft in a narrow space is further increased. Since it can be formed closely, the suction magnetic force can be further amplified by the pressing force by the lever principle.

Fourth, when the pressing protrusion formed on the interlocking link part rotates and the inclined contact surface part of the handle mounting part fixed to the housing part is pressed in line, the trip part retracts and the restraint of the latch part supported on the front surface is physically released. Since it is blocked, expensive parts such as a video current transformer are not required, and thus economic efficiency can be significantly improved.

1 is a perspective view showing a state in which the cover of the suction rotation type circuit breaker according to an embodiment of the present invention is separated and the inside is exposed.
2 is an enlarged view of part 'A' of FIG. 1;
3 is an exploded perspective view showing a trip unit and a suction rotation device in the suction rotation type circuit breaker according to an embodiment of the present invention.
Figure 4 is a perspective view showing a combined state of the suction rotation device in the suction rotation type circuit breaker according to an embodiment of the present invention.
5 and 6 and 7 is an exemplary view showing the operating state of the suction rotary circuit breaker according to an embodiment of the present invention.

Hereinafter, a suction rotation type circuit breaker according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a state in which the cover of the suction rotation type circuit breaker is separated according to an embodiment of the present invention, and FIG. 2 is an enlarged view of part 'A' of FIG. 1, and FIG. 3 is a view of the present invention It is an exploded perspective view showing a trip unit and a suction rotation device in the suction rotation type circuit breaker according to an embodiment, and FIG. 4 is a perspective view showing a combined state of the suction rotation device in the suction rotation type circuit breaker according to an embodiment of the present invention. 5 and 6 and 7 is an exemplary view showing the operating state of the suction rotary circuit breaker according to an embodiment of the present invention. At this time, it is preferable to understand the suction rotary circuit breaker and the circuit breaker to be described below in the same sense. In addition, it is preferable to understand that the drawing of FIGS. 5 to 7 is omitted from the electric wire and the load output unit.

1 to 7, the suction rotation type circuit breaker 500 according to an embodiment of the present invention includes a housing part 10, a movable switching part 520, a cross bar 530, a trip part 540, It includes a latch part 50, a handle part 60 and a suction rotation device 570.

In detail, the housing part 10 includes an internal space in which components of the circuit breaker 500 are accommodated, and is preferably formed of an insulating and non-combustible synthetic resin material. A partition partition wall, an installation groove, or a hole is formed inside the housing part 10 so that each component is installed and assembled. Here, the front side of the housing portion 10 is provided with a power input unit 11 connected to the power supply side, a rear side is provided with a load output unit 12 connected to the load side, and the power input unit 11 has a fixed contact unit ( 13) is provided.

In addition, the movable switching unit 520 is disposed for selective power connection between the power input unit 11 and the load output unit 12. Here, the movable switching unit 520 is preferably provided with a first plate portion 521 and a second plate portion (522).

In detail, the first plate portion 521 may include an extended face portion 523 adjacent to the fixed contact portion 13 but extending rearward. Here, the front end portion of the extended facing portion 523 is provided with a movable contact portion 525 that is in contact with the fixed contact portion 13. That is, it is preferable to understand that the first plate portion 521 includes the extended facing portion 523 and the movable contact portion 525 provided on the front end side thereof. At this time, the extension facing portion 523 is preferably formed of a conductive metal material that provides elastic resilience so that the movable contact portion 525 is in contact with the fixed contact portion 13 so as to be electrically connected and selectively spaced apart.

In addition, the second plate portion 522 is connected to the rear end of the first plate portion 521 and is connected to the rear end portion of the first plate portion 521. ) Is preferably formed. Here, the rear end portion of the extended face portion 523 and the rear end portion of the magnetized face portion 524 overlap, but are fixed to the housing portion 10 through screws. The second plate portion 522 is formed of a conductive metal material like the extension face portion 523 and is electrically connected to the load output portion 12 through the electric wire 15. Therefore, when the front end portion of the first plate portion 521 is pressed downward, the fixed contact portion 13 and the movable contact portion 525 contact, and the power input unit 11, the first plate portion 521, Current flows through the second plate portion 522, the electric wire 15, and the load output portion 12.

Here, the extending face portion 523 and the magnetizing face portion 524 are preferably formed of a metal material that has conductivity while being magnetized through a current. Of course, in some cases, the magnetization facing portion 524 may be formed of a bimetal having a different thermal expansion coefficient, while the front and rear surfaces are magnetized. That is, when the temperature of the second plate portion 522 increases due to the resistance current passing through the overcurrent, it may be formed to be bent toward the rear side having a low coefficient of thermal expansion.

Meanwhile, the crossbar 530 is provided to press the front end portion of the first plate portion 521 downward. Here, the crossbar 530 is provided on the front end side of the first plate portion 521, and a transit portion 531 that is opened to cross the front end portion of the first plate portion 521 is formed. At this time, it is preferable to understand that the front end portion of the first plate portion 521 is substantially pressed as the front end portion of the extended facing portion 523 is pressed. The crossbar 530 is pressurized to the lower side by the pressing force applied from the upper side, but supported by the upper side through the elastic means 533 provided in the lower portion.

In detail, in the normal state, the force to which the crossbar 530 is pressed downward acts more than the elastic force of the elastic means 533. Therefore, the state in which the crossbar 530 is pressed downward is maintained, and the elastic means 533 is compressed. And, the front end portion of the first plate portion 521 disposed across the light oil portion 531 is bent and pressed downward. Through this, the movable contact portion 525 is contacted with the fixed contact portion 13. At this time, when an overcurrent occurs or the force pressing the crossbar 530 through operation of the handle unit 60 is lost, the crossbar 530 is moved upward through the elastic restoring force of the elastic means 533. At the same time, since the pressing force used to press the first plate portion 521 is lost, the movable contact portion 525 is spaced apart from the fixed contact portion 13 while the extended facing portion 523 is extended through the elastic restoration force.

On the other hand, the trip portion 540 is disposed opposite to the rear side of the magnetization facing portion 524, and is provided to be rotated back and forth around a rotating end portion 540a formed in the lower portion. At this time, an inclined step 541 is protruded forward on the front portion of the trip unit 540. In addition, the latch portion 50 has a front end portion 50a facing the upper surface of the crossbar 530 and a rear end portion 50b extending to a length facing the front portion of the trip portion 540. At this time, the rear end portion 50b of the latch portion 50 is formed to be in contact with or adjacent to the inclined step 541.

In addition, a support surface portion 542 extending from the lower side to the rear side direction is preferably formed on the rear side of the trip portion 540. In addition, the upper surface of the support surface portion 542 is provided with a rotational support portion 543 including a first rotational shaft 544 and a second rotational shaft 545 that are spaced apart from each other at predetermined intervals and disposed in the vertical direction, respectively. desirable.

Here, the first rotating shaft 544 and the second rotating shaft 545 may be provided with a diameter corresponding to each other, and are arranged side by side in the width direction of the trip portion 540, the first rotating shaft 544 The length in the vertical direction of the second rotation shaft 545 may be formed to be less than the length in the vertical direction. At this time, the first rotation shaft 544 and the second rotation shaft 545 may be fitted by being fitted into a groove formed in the support surface portion 542, and may be integrally formed with the trip portion 540. .

Further, the suction link part 571, which will be described later, is hinged to the first rotation shaft 544, and the interlocking link part 572, which will be described later, can be inserted into the second rotation shaft 545 to rotate. At this time, a pin insertion portion 545a may be recessed downwardly in a radially inner direction so that a cap portion 573 to be described later is coupled to an upper surface of the second rotation shaft 545.

In addition, the handle portion 60 is coupled to the front and rear rotation operation to the housing portion 10, the pressing member 61 is moved up and down to press the latch portion 50 in accordance with the rotation direction is connected to the lower portion . At this time, the rotational direction means that the movable contact portion 525 and the fixed contact portion 13 are operated in contact, and the movable contact portion 525 and the fixed contact portion 13 are operated apart from each other. It is desirable to understand that it covers the blocking direction. Hereinafter, the connection direction will be described and illustrated in the direction of rotation to the front, and the blocking direction will be described and illustrated in the direction of rotation to the rear.

In detail, the pressing member 61 is moved downward while the handle portion 60 is rotated in the connection direction. At this time, the pressing member 61 is hinged to the elevating connecting portion formed on the central side of the latch portion 50. Therefore, when the pressing member 61 is moved downward, the latch portion 50 is moved in conjunction, but the rear end portion 50b of the latch portion 50 is supported in surface contact with the inclined upper surface of the inclined step 541. . Then, while the rear end portion 50b of the latch portion 50 is supported by the inclined step 541, the front end portion 50a is rotated downward to contact the latch pressing portion 32 and the crossbar 530. By pressing, the fixed contact portion 13 and the movable contact portion 525 are contact-connected.

Here, the circuit breaker 500 preferably includes a handle mounting portion 62 fixed to the housing portion 10 so that the handle portion 60 is hinged. At this time, a pin member may be inserted through the lower end of the handle unit 60 and the upper end of the handle mounting unit 62 to be hinged to each other. In addition, the handle portion 60 may be supported by an elastic member such as a torsion spring interposed in the pin member.

And, the rear portion of the handle mounting portion 62 is a pressure projection (572b) to be described later is selectively rotated and disposed facing the front side of the pressure projection (572b) so as to be pressed in a line contact, but toward the end in the rear and width direction inward direction It is preferable that the inclined contact surface portion 63 which extends backwards obliquely is formed. That is, it is preferable that the inclined contact surface portion 63 is disposed to be inclined so that the distance from the pressing protrusion 572b decreases as it goes toward the end. At this time, the handle portion 60 may be selectively seated on the inclined contact surface portion 63.

On the other hand, the suction rotation device 570 is suction rotated in one direction around the rotation support portion 543 connected to the rear side of the trip portion 540 by the suction magnetic force generated in the magnetization facing portion 524 when an overcurrent occurs. It is preferable to include a link portion 571.

In addition, the suction rotation device 570 is connected to the suction link portion 571 in a two-stage lever form, rotates in the other direction around the rotation support portion 543 and presses the crossbar 530. Including the interlocking link unit 572 for interlocking the trip unit 540 by pressing the handle mounting unit 62 fixed to the housing unit 10 so that the 50 is spaced apart from the inclined step 541. desirable.

Here, the suction link portion 571 is disposed opposite to the rear side of the magnetization facing portion 524, and in one direction around the rotation supporting portion 543 by the suction magnetic force generated in the magnetizing facing portion 524 when an overcurrent occurs. It is preferably rotated. At this time, the suction link portion 571 is rotated in one direction around the first rotation shaft 544, the interlocking link portion 572 is connected to the suction link portion 571, the second rotation shaft 545 It can be rotated in the other direction around.

In addition, the suction rotation device 570 is connected to the rotation support portion 543 so that the latch portion 50 that presses the crossbar 530 is spaced apart from the inclined step 541 and is interlocked to rotate, so that the pressure is applied. It is preferable that the projection 572b is provided so as to reciprocate the trip portion 540 by pressing the handle mounting portion 62. The suction rotation device 570 is preferably provided with a magnetic material. For example, the suction rotation device 570 may be provided with a metal containing a large amount of ferrous (Fe) components, such as pure iron or cast iron.

In detail, the suction rotation device 570 includes a suction link portion 571 made of a magnetic material hingedly connected to the first rotation shaft 544 and an interlocking link portion 572 inserted to rotate on the second rotation shaft 545. It is preferred to include.

Here, the suction link portion 571 is a flat plate-shaped suction portion 571a spaced apart from the rear surface of the magnetization facing portion 524 and the suction portion 571a is integrally bent and connected to the width direction. It is preferable that the inner end 571d surrounds the outer surface of the first rotation shaft 544 and includes an interlocking rotation part 571c that is hinged. At this time, the suction part 571a and the interlocking rotation part 571c are arranged along the width direction of the housing part 10, the width of the inner end of the suction part 571a and the width of the interlocking rotation part 571c Between the outer ends in the direction, it is preferable that the bent portions 571b are integrally bent along the front-rear direction. Accordingly, as the suction portion 571a is magnetically sucked in one direction, which is the blocking direction, by the suction magnetic force generated in the magnetization facing portion 524, the entire suction link portion 571 moves the first rotating shaft 544. It can be rotated in one direction to the center.

In this way, the suction link portion 571 is preferably the suction portion 571a, the bent portion 571b and the interlocking rotating portion 571c are integrally formed of a magnetic material. Therefore, since the suction link portion 571 for the net seat lip of the circuit breaker 500 is simply provided in a simple shape to be bent, manufacturability can be significantly improved.

In addition, it is preferable that the stopper 546 extends upwardly at the rear end of the support surface portion 542. At this time, the stopper 546 is arranged to be spaced apart at a predetermined distance from the rear of the interlocking rotating portion 571c in the initial arrangement position, the interlocking rotating portion 571c is located on the front portion of the stopper 546, the suction link portion ( 571) may be contacted after being rotated in one direction by a predetermined rotational angle around the first rotational shaft 544, and rotation may be restricted.

On the other hand, the interlocking link portion 572 is preferably provided with a hollow cylindrical shape and is inserted to be rotated on the second rotating shaft 545 and is hinged. In addition, the interlocking link portion 572 is preferably linked to the inner end 571d of the interlocking rotating portion 571c so as to rotate interlocking in the other direction, which is the opposite direction of one direction, when the suction link portion 571 is rotated in one direction. .

In detail, the interlocking link portion 572 preferably includes a link body 572a through which an insertion hole 572e is penetrated in an up and down direction with an inner diameter corresponding to the outer diameter of the second rotating shaft 545 inside the radial direction. . At this time, it is preferable that the inner circumference of the insertion hole 572e is spaced apart from the outer circumference of the second rotation shaft 545 so that the link body 572a is rotated in the other direction. In addition, the link body 572a is preferably disposed more upward than the position of the suction link portion 571.

In addition, the upper portion of the interlocking link portion 572 and the second rotation shaft 545 is preferably fitted with a cap portion 573 provided to cover the upper portion of the interlocking link portion 571. At this time, the cap portion 573 covers the insertion pin formed with an outer diameter corresponding to the inner diameter of the pin insertion portion 545a and the upper portion of the interlocking link portion 572 so that it is forcibly fitted into the pin insertion portion 545a. So that it may include a head portion that extends radially outward along the circumferential direction from the top of the insertion pin. Accordingly, the cap portion 573 covers the upper portion of the interlocking link portion 572 and is fitted into the upper portion of the second rotating shaft 545 to prevent upward departure of the interlocking link portion 572, thereby improving durability. Can be.

In addition, the interlocking link portion 572 is inserted into the slot 571d formed on the inner end 571d of the interlocking rotating portion 571c so that the link is connected to the link protrusion 572c from the lower outer periphery of the link body 572a. It is desirable to protrude downward. In addition, the link protrusion 572c is inserted into the slot 571e, but both circumferential sides are preferably connected to the inner end 571d of the interlocking rotating part 571c.

At this time, it is preferable that the slot 571e for link connection is formed in the vertical direction at the inner end 571d of the interlocking rotation part 571c. That is, it is preferable that the inner end 571d of the interlocking rotating part 571c surrounds the outer surface of the first rotating shaft 544 and the slots 571e are formed at positions spaced apart from each end extending to both sides. Do. At this time, it is preferable that the outer surface of the portion where the slot 571e is formed is exposed while the outer surface of the first rotating shaft 544 is wrapped by the inner end 571d of the interlocking rotating part 571c.

Accordingly, when the suction link portion 571 is rotated in one direction in the blocking direction around the first rotation axis 544 by the suction magnetic force generated in the magnetization facing portion 524, the suction link portion 571 The linked linkage link part 572 may be rotated simultaneously in the other direction.

Here, the suction force so that the suction magnetic force is converted and amplified in two stages by the pressing force of the pressing protrusion 572b that presses the inclined contact surface portion 63 formed on the handle mounting portion 62 of the handle portion 60 by the lever principle The distance between the first rotational shaft 544 at the outer end of the portion 571a is preferably formed longer than the distance between the first rotational shaft 544 and the second rotational shaft 545. That is, the first rotation axis 544 acts as a support point in a lever principle, and the second rotation axis 545 is a distance between the first rotation axis 544 at the outer end of the suction part 571a which is a force point. And it is preferable to understand that it is formed longer than the distance between the first rotation axis (544).

In addition, the distance between the second rotating shaft 545 at the outer end of the link protrusion 572c is preferably formed shorter than the distance between the second rotating shaft 545 at the outer end of the pressing protrusion 572b. That is, the second rotating shaft 545 acts as a support point in the lever principle, the distance between the second rotating shaft 545 at the outer end of the link protrusion 572c, which is a force point, and the pressing projection 572b, which is an operating point, and It is preferable to understand that it is formed shorter than the distance between the second rotation shafts 545.

Therefore, when the overcurrent occurs, the relatively small suction magnetic force of the magnetizing face portion 524 is amplified in two stages by the pressing force for retracting the trip portion 540 to the rear side by the lever principle, thereby significantly improving the operational accuracy for instantaneous current blocking. Can be.

In particular, since the link protrusion 572c of the interlocking link portion 572 that is linked to the suction link portion 571 protrudes downward, the distance between the first rotation shaft 544 and the second rotation shaft 545 Since it can be formed closer, the suction magnetic force in a narrow space can be further amplified with a pressing force by the lever principle.

In addition, when the overcurrent occurs, the suction link portion 571 is rotated in one direction through the suction magnetic force of the magnetizing face portion 524, and at the same time it is linked to the suction link portion 571, but is interlocked with the force amplified by the lever principle. The link portion 572 is interlocked and rotated in the other direction. In this way, through the structure of the suction rotating device 570 in which the suction magnetic force is amplified by the lever principle, the current flow can be accurately and instantaneously blocked.

At this time, the front of the suction portion 571a is disposed facing the rear surface of the magnetization facing portion 524, so that the distances between them are close as they are rotated in one direction. Therefore, since the suction magnetic force of the magnetizing face portion 524 is amplified and converted to the pressing force of the pressing protrusion 572b through the lever principle, the suction rotating device 570 can be rotated more immediately. Through this, when the overcurrent occurs, the suction magnetic force is amplified and switched to the pressing force by the lever principle, so that the suction rotating device 570 is rapidly rotated and interlocked and retracts the trip unit 540 connected thereto, so that the current may be temporarily blocked.

Here, the separation distance between the suction portion 571a and the magnetization-facing portion 524 may be set by a length in the front-rear direction of the bending portion 571b. In detail, even if the magnetization facing portion 524 is magnetized by the flow of electric current, the suction rotation device 570 should be set not to rotate in the normal allowable current range. In addition, the suction rotation device 570 must be rotated by suction by the suction magnetic force formed in the magnetization facing portion 524 in an overcurrent state exceeding the normal allowable current range.

To this end, the separation interval between the suction portion 571a and the magnetization facing portion 524 is installed to maintain the calculated gap value. At this time, the calculated gap value means that the suction magnetic force affects the suction rotation device 570 so that the circuit breaker 500 is normally driven in response to a preset normal allowable current range and a cutoff current required to be cut off. It is desirable to understand the range of intervals. That is, when the cut-off current is measured as a small value, the separation interval is formed narrowly, and when the cut-off current is measured as a large value, the separation interval can be formed broadly.

At this time, when the calculated interval value and the interval operated through the actual test are different, the distance between the suction part 571a and the magnetizing face part 524 is varied by varying the length in the front-rear direction of the bent part 571b. By controlling the driving of the circuit breaker 500 can be precisely set. Through this, the breaker 500 can be clearly cut off when an overcurrent occurs, so that driving reliability can be significantly improved.

On the other hand, the circuit breaker 500 is inserted into the first rotation shaft 544, but further includes a torsion spring 574 provided on the upper portion of the interlocking rotation unit 571c so that the suction rotation device 570 is elastically restored. desirable. At this time, even if the magnetization-facing portion 524 is magnetized in the normal allowable current range, the torsion spring 574 has a predetermined elastic restoring force so that the suction portion 571a is prevented from being sucked and moved toward the magnetization-facing portion 524. It is preferably provided to have.

Here, the torsion spring 574 is one side (574a) is in contact with the front outer surface of the interlocking rotating portion (571c) is disposed in the vertical direction, the other side (574b) is the link body (572a) of the interlocking link portion (572) It is preferred that the outer surface is jammed and inserted into the rising preventing groove 572d that is recessed in the radial direction along the circumferential direction.

Therefore, the suction link portion 571 and the interlocking link portion 572 rotated interlocked in one direction and the other direction by the elastic restoring force of the torsion spring 574 can be restored to the initial arrangement position.

In addition, the other end portion 574b of the torsion spring 574 is inserted into the anti-rising groove 572d formed in the interlocking link portion 572 to prevent upward departure from the cap portion 573, so that the interlocking rotating portion Since it supports (571c), upward separation of the suction link part 571 is prevented without a separate device, and durability can be improved.

On the other hand, the interlocking link portion 572 is selectively rotated to the inclined contact surface portion 63 of the handle mounting portion 62 on the outer circumference of the link body 572a, and the pressing protrusion 572b is extended to be pressed in line contact. It is desirable to be snowy. At this time, the pressing projection (572b) is preferably formed to form a predetermined angle along the circumferential direction with the link projection (572c) about the second rotation axis (545).

Therefore, when the suction link portion 571 is rotated in one direction and the linkage link portion 572 is rotated in the other direction, the pressing protrusion 572b is rotated on the inclined contact surface portion 63 and is pre-contacted and pressed. You can. At this time, since the handle mounting portion 62 is fixed to the housing portion 10, the trip portion 540 may be retracted to the rear side as the pressing projection 572b is pressed to the inclined contact surface portion 63. have.

Moreover, since the inclined contact surface portion 63 is disposed to be inclined in correspondence to the other direction, which is the blocking direction of the interlocking link portion 572, the pressing force due to the line contact is continuously maintained even if the pressing protrusion 572b is continuously rotated. You can.

On the other hand, when current flows through the power input unit 11, the current flows to the first plate portion 521 and the second plate portion 522, thereby being magnetized. At this time, when the overcurrent flows in, the suction magnetic force to suck metal around the periphery increases in response to the current through which the first plate portion 521 and the second plate portion 522 flow.

Here, as the suction link portion 571 is provided with a magnetic material, it is sucked and rotated in one direction in the blocking direction around the first rotation axis 544 by the suction magnetic force. At the same time, the connection link portion 572 connected to the suction link portion 571 is interlocked and rotated in the other direction.

At this time, the pressing protrusion 572b of the connection link portion 572 is rotated on the inclined contact surface portion 63 of the handle mounting portion 62 fixed to the housing portion 10, and when the line contact is pressed, the trip portion 540 ) Is retracted. Accordingly, the rear end portion of the latch portion 50 is spaced apart from the inclined step 541, and the restraining force that pressurized and supports the latch portion 50 is lost. Through this, the pressing force applied to the crossbar 530 is removed, and the movable contact portion 525 and the fixed contact portion 13 may be spaced apart while the extension face portion 523 is recovered and unfolded.

In addition, when the movable contact portion 525 and the fixed contact portion 13 are separated, the suction magnetic force of the magnetization facing portion 524 is lost, so the suction link portion 571 and the interlocking link portion 572 are It is elastically restored by the torsion spring 574 and can be rotated interlocked in the other direction and one direction, respectively, and moved to the initial arrangement position.

On the other hand, the handle portion 60 is hinged to the handle mounting portion 62 provided in the housing portion 10, but when the restraining force supporting the latch portion 50 is lost, the return means provided on one side It is rotated in the blocking direction through the elastic restoration force. At this time, the return means may be provided with a torsion spring or plate spring. In addition, the pressing member 61 hinged to the lower end of the handle portion 60 is moved upward, and the latch portion 50 can be completely separated from the crossbar 530 and the trip portion 540.

At this time, when the handle portion 60 is rotated in the connection direction so that the current is reconnected, the pressing member 61 is moved downward, but the rear end portion 50b of the latch portion 50 is directed to the inclined step 541 side. It is supported to move and contact back to its upper surface. Then, when the pressing force of the pressing member 61 is continuously transmitted while the rear end portion 50b of the latch portion 50 is supported, the front end portion 50a of the latch portion 50 is moved downward. At this time, the first plate portion 521 is pressed downward as the front end portion of the latch portion 50 is contacted and the pressing force is transmitted to the lower side of the latch pressing portion 32, and the movable contact portion 525 and the The fixed contact portion 13 is manipulated to contact again.

In addition, a return means for returning the rotation angle of the trip portion 540 is further provided on the rotation end portion 540a side. Therefore, after the rear end portion 50b of the latch portion 50 is rotated in the rear direction so as to be separated from the inclined step 541, the position is immediately returned through the return means. At this time, when the position of the trip unit 540 is returned, the suction rotation device 570 is returned to the initial arrangement position, and at the same time, the position of the suction rotation device 570 is initially positioned by the torsion spring 574. Can be returned to. Here, the initial arrangement position of the suction rotation device 570 means that the suction portion 571a is spaced apart from the magnetization facing portion 524 and the pressing protrusion 572b is spaced apart from the inclined contact surface portion 63. It is desirable to understand that it is arranged in a state.

As described above, the suction rotation type circuit breaker 500 according to the present invention is disposed opposite to the rear side of the magnetization facing portion 524 where the suction portion 571a of the suction rotating device 570 is disposed in the longitudinal direction. In addition, when the overcurrent flows in, the pressing protrusion 572b linked to the rotating support part is instantaneously rotated in one direction through the suction magnetic force generated in the magnetizing face portion 524, and the housing part 10 is rotated in the other direction. ) To quickly press the handle mounting portion (62) fixed to the trip portion 540 to interlock retreat. Through this, it is possible to be provided with a circuit breaker 500 having a faster current blocking speed than a bimetal that is bent through a conventional resistance heat.

Here, the distance between the first rotating shaft 544 at the outer end of the suction portion 571a is longer than the distance between the first rotating shaft 544 and the second rotating shaft 545, and the link protrusion ( The distance between the second rotating shaft 545 at the outer end of 572c is shorter than the distance between the second rotating shaft 545 at the outer end of the pressing protrusion 572b. Therefore, when the overcurrent occurs, the suction magnetic force of the magnetizing face portion 524 is amplified in two stages by the pressing force of the pressing protrusion 572b for retracting the trip portion 540 to the rear side according to the lever principle, thereby blocking the instantaneous current. The operational accuracy of the can be significantly improved.

In particular, the link protrusion 572c is protruded downward from the interlocking link portion 572 hinged to the second rotating shaft 545 to the inside of the suction link portion 571 hinged to the first rotating shaft 544. It is linked to the stage 571d. Accordingly, the distance between the first rotational shaft 544 and the second rotational shaft 545 can be formed closer in a narrow space, so that the suction magnetic force can be further amplified by the lever principle.

Moreover, when the pressing protrusion 572b formed on the interlocking link portion 572 is rotated and the line contact pressure of the inclined contact surface portion 63 of the handle mounting portion 62 fixed to the housing portion 10 is pressed in advance, the trip portion ( 540) the current is cut off in a simple way that the restraint of the latch part 50, which is supported on its front surface, is physically released as the interlock retreats. Therefore, expensive parts such as a video current transformer are not required, and thus economic efficiency through manufacturing cost reduction and product compactness can be significantly improved.

At this time, the terms "include", "compose", "have" or "have" as described above mean that the corresponding component can be intrinsic, unless otherwise stated. It should be construed that other components may be included rather than excluded. All terms, including technical or scientific terms, have the same meaning as generally understood by a person skilled in the art to which the present invention pertains, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted as being consistent with the contextual meaning of the related art, and are not to be interpreted as ideal or excessively formal meanings unless explicitly defined in the present invention.

As described above, the present invention is not limited to each of the above-described embodiments, and it is possible to be modified by a person skilled in the art to which the present invention pertains without departing from the scope of the claims of the present invention. And, these modifications are within the scope of the present invention.

10: housing unit 520: movable switching unit
530: Crossbar 540: Trip section
543: rotation support 544: first rotation shaft
545: 2nd rotation shaft 50: latch part
60: handle portion 570: suction rotating device
571: suction link unit 572: interlocking link unit
500: suction rotating circuit breaker

Claims (5)

A housing unit provided with a power input unit and a load output unit spaced apart at the front and rear sides;
It is disposed between the power input unit and the load output unit, and the front end is connected to the power input unit to provide elastic recovery force to the upper side so as to be selectively spaced apart, and the rear end portion is formed with a magnetization facing portion formed in a portion extending in the upward direction. Switching unit;
A crossbar formed on one side via an opening through which the front end side of the movable switching portion is transverse, but supported by an elastic means provided at a lower portion, to be supported upwards;
A trip unit disposed opposite to the rear side of the magnetization facing portion and rotated back and forth around the lower end portion, but having an inclined step forward in the front portion;
A front end portion facing the upper surface of the crossbar, but a rear end portion in contact with the upper surface of the inclined step so that the power input portion and the movable switching portion are in contact with each other; a latch portion for pressing the crossbar downward;
A handle portion coupled to the housing portion to be rotated back and forth, and a pressing member connected to a lower portion to move upward and downward to press the latch portion downward according to a rotation direction; And
When an overcurrent occurs, the suction link part rotates in one direction with respect to the rotation support part connected to the rear side of the trip part by the suction magnetic force generated in the magnetization facing part, and the suction link part is linked in a two-stage lever to form the rotation support part A suction rotation device including an interlocking link portion that rotates in the other direction and presses the handle mounting portion fixed to the housing so that the latch portion pressing the crossbar is spaced apart from the inclined stepped portion and interlocking the trip portion.
The rotation support part includes a first rotation axis and a second rotation axis that are spaced apart from each other at predetermined intervals and are respectively disposed in the vertical direction,
The suction link portion is provided with a magnetic material but is disposed on the back side of the magnetization facing portion and is spaced apart from the suction portion, and is bently connected to the suction portion, but is centered around the first rotational axis by the suction magnetic force generated in the magnetization facing portion. The inner end of the first rotation shaft so as to rotate in one direction includes an interlocking rotation part that is hinged and connected,
The interlocking link part is hinged to the second rotating shaft, and a link protrusion is linked to an inner end of the interlocking rotation part so as to be interlocked in the other direction when the suction link part rotates in one direction. A suction rotation type circuit breaker characterized in that the pressurized projection is protruded. delete The method of claim 1,
By the lever principle, the suction magnetic force is amplified in two stages by the pressing force of the pressurizing projection which pressurizes the handle portion,
The distance between the first rotation axis at the outer end of the suction part is formed longer than the distance between the first rotation axis and the second rotation axis,
The distance between the second rotating shaft at the outer end of the link protrusion is shorter than the distance between the second rotating shaft at the outer end of the pressure protrusion. The method of claim 1,
A slot for link connection is formed at the inner end of the interlocking rotation unit in the vertical direction, and the link protrusion protrudes downwardly at the lower portion of the interlocking link unit so as to be inserted into the slot.
The handle portion of the handle portion further comprises a handle mounting portion fixed to the housing portion to be hinged,
A suction rotating circuit breaker, characterized in that the rear portion of the handle mounting portion is disposed on the front side of the pressing protrusion so that the pressing protrusion is selectively rotated and pressed in a line contact, but an inclined contact surface portion is formed to extend backward to the rear side toward the end. The method of claim 1,
It is inserted into the first rotary shaft, but further comprises a torsion spring provided on the upper portion of the interlocking rotating unit so that the suction rotation device is elastically restored,
The torsion spring, one side is in contact with the outer surface of the front side of the interlocking rotation part and is disposed in the vertical direction, the other side is inserted into the anti-lift groove formed in the radially inner depression along the circumferential direction on the outer surface of the interlocking link part,
A suction rotating circuit breaker characterized in that the cap portion provided to cover the upper portion of the interlocking link portion is fitted into the upper portion of the second rotating shaft.

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