KR102155223B1 - amateur hanging type temperature detecting circuit breaker - Google Patents

Abstract

The present invention relates to an armature hanging-type temperature detecting circuit breaker. According to the present invention, the armature hanging-type temperature detecting circuit breaker comprises: a housing unit including a power input unit and a load output unit; a movable switching unit including a contact plate unit; a crossbar connected to the contact plate unit; an armature including a suction end and a driving end; a trip bar; a latch unit; a cradle; a handle unit; and a temperature detection bimetal. According to the present invention, operation precision can be remarkably improved.

Description

Amateur hanging type temperature detecting circuit breaker

The present invention relates to an armature locking type temperature sensing circuit breaker, and more particularly, to an armature locking type temperature sensing circuit breaker with improved safety during heat generation while the configuration is simplified.

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

Here, conventionally, a bimetal type circuit breaker has been disclosed that uses two metal plates having different coefficients of thermal expansion attached to each other and bends toward a lower coefficient of thermal expansion when heat due to an overcurrent is applied. In such a bimetal type circuit breaker, when current is supplied to a circuit, resistance is generated to heat the bimetal, and when an excessive current exceeding a certain standard flows, the bimetal bends and drives adjacent trip units. In addition, the contact terminal coupled to the lower portion of the bimetal is separated from the input terminal to block the flow of current.

However, the conventional bimetal type circuit breaker has a problem in that the circuit breaker does not block the current flow even if high heat is generated inside the case of the circuit breaker due to an internal defect or a fire generated from the outside.

Therefore, regardless of the ambient temperature of the circuit breaker, since the circuit breaker simply provides a function of blocking the current flow, there is a serious problem that may lead to a secondary safety accident in case of an internal defect or an external fire.

Korean Utility Model Registration No. 20-0341427

In order to solve the above problems, the present invention is a solution to provide an armature locking type temperature sensing circuit breaker with improved safety during heat generation while simplifying the configuration.

In order to solve the above problems, the present invention includes a housing unit provided with a power input unit and a load output unit spaced apart from each other at the front and rear sides; A movable switching unit provided with a contact plate selectively contacted to the power input unit for selective power connection between the power input unit and the load output unit; A crossbar connected to the contact plate to selectively press the contact plate; When an overcurrent occurs in the overcurrent detecting means electrically connected between the rear portion of the contact plate portion and the load output portion, a suction end portion which is sucked and rotated toward the overcurrent detecting means, and a drive extending downwardly bending integrally from the front end side of the suction end portion An armature including an end; A trip bar disposed opposite to the lower front surface of the driving end and disposed to move back and forth to a handle mounting portion provided in the housing portion; A latch part having the trip bar connected to the lower end and having a central part rotated back and forth with respect to a latch rotation shaft connected to the handle mounting part; A cradle having an upper end selectively engaged with an upper portion of the latch portion, and having a lower end thereof rotated back and forth based on a cradle rotation axis connected to the handle mounting portion; A handle portion coupled to the handle mounting portion provided in the housing portion so as to be rotated forward and backward, and connected to a link with the cradle at a lower portion thereof, and a link portion configured to press the crossbar downward in a rotation direction; And a fixed end is coupled and fixed to an upper end of one side in the width direction of the yoke disposed between the overcurrent sensing means and the driving end, and a free end from the fixed end extends toward the other side in the width direction of the yoke, and is located on the front side of the suction end. When the surrounding temperature of the housing unit rises above a preset safe temperature, the free end is bent and deformed, so that the suction end is pressed downward so that the contact plate is separated from the power input unit so that the rear surface is lower than the front surface. It provides an armature locking type temperature sensing circuit breaker including a temperature sensing bimetal formed by coefficient.

Through the above solving means, the armature locking type temperature sensing circuit breaker according to the present invention provides the following effects.

First, when the surrounding temperature of the housing unit rises above the preset safety temperature, the free end is bent backwards based on the fixed end of the temperature sensing bimetal fixed to the yoke, so when pressing the locking protrusion side of the suction end, the driving end moves the trip bar forward. As the trip operation is performed, the current flow is automatically blocked to prevent a secondary safety accident.

Second, since the inclined contact surface is formed to be inclined downward toward the front of the locking protrusion integrally protruding upward on the front side of the upper surface of the suction end and is disposed opposite to the rear side of the free end, the pressing force of the free end is deflected backward by the thermal expansion coefficient. Since it is stably transmitted to the suction end and the drive end, the operating precision can be remarkably improved.

Third, if the ambient temperature is higher than the preset safe temperature, the free end is bent backwards by the coefficient of thermal expansion based on the fixed end, and the state of pressing the driving end and the trip bar forward is maintained. Even if the handle is arbitrarily manipulated, the latch engaging projection and the cradle It is possible to significantly improve the safety of use with a safety structure in which the jam between the top and front sides of the top is released, and the state of separation of the fixed and movable contacts is maintained and current is cut off.

Fourth, simple assembly in which a temperature-sensing bimetal is installed in the yoke through a fastening member in a state in which the first fixing hole formed through the front-rear direction and the second fixing hole formed through the fixing end are aligned in the joint on one upper end of the width direction of the yoke. With the structure, assembly and productivity can be remarkably improved.

1 is a perspective view showing a state in which the cover of an armature locking-type temperature sensing circuit breaker according to an embodiment of the present invention is separated and the interior thereof is exposed.
2 and 3 are perspective views showing a state of use of an armature locking type temperature sensing circuit breaker according to an embodiment of the present invention.
Figure 4 is a side view showing a state of use of the armature locking type temperature sensing circuit breaker according to an embodiment of the present invention.
Figure 5 is an exemplary view showing an assembly process of the armature locking type temperature sensing circuit breaker according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail an armature locking type temperature sensing circuit breaker according to a preferred embodiment of the present invention.

1 is a perspective view showing a state in which the cover of an armature locking type temperature sensing circuit breaker according to an embodiment of the present invention is separated and exposed, and FIGS. 2 and 3 are an armature locking type temperature according to an embodiment of the present invention. A perspective view showing the state of use of the sensing circuit breaker, Figure 4 is a side view showing the state of use of the armature locking type temperature sensing circuit breaker according to an embodiment of the present invention, Figure 5 is an armature locking type temperature according to an embodiment of the present invention It is an exemplary diagram showing the assembly process of the sensing circuit breaker.

In this case, it is preferable to understand that the cover and the housing part of the armature locking type temperature sensing circuit breaker in FIGS. 2 to 4 are separated and the interior is exposed as an example. In FIG. 4, the interior of the handle mounting part is exposed as an example. It is desirable to understand as shown. In addition, it is preferable that the armature-engaging temperature sensing circuit breaker and the circuit breaker to be described below are understood to have the same meaning.

As shown in Figs. 1 to 5, the armature locking type temperature sensing circuit breaker 600 according to an embodiment of the present invention includes a housing unit 10, a movable switching unit 20, a crossbar 30, an overcurrent sensing means, It includes an armature 550, a yoke 560, a trip bar 75, a latch part 70, a cradle 73, a handle part 80, and a temperature sensing bimetal 590.

In detail, the housing unit 10 includes an internal space in which the component parts of the circuit breaker 600 are accommodated, and is preferably formed of an insulating and non-flammable synthetic resin material. Partition partition walls, installation grooves, or holes are formed in the interior of the housing 10 so that each component is installed and assembled. Here, a power input unit 11 connected to the power side is provided at the front side of the housing unit 10, and a load output unit 12 connected to the load side is provided at the rear side, and the power input unit 11 has a fixed contact unit ( 13) is provided. In this case, it is preferable to understand that in an embodiment of the present invention, the power input unit 11 side is described forward, and the load output unit 12 side is described rearward.

In addition, the movable switching unit 20 is disposed between the power input unit 11 and the load output unit 12 for selective power connection. Here, the movable switching unit 20 is provided with a contact plate portion (21a) to which the front end portion is selectively connected to the power input unit (11).

In detail, it is preferable that the contact plate portion 21a is provided as a flat plate having a rectangular cross section so that the front end portion is disposed adjacent to the fixed contact portion 13 and extends rearward. Here, the movable switching part 20 includes a movable contact part 22 that is contactly connected to the fixed contact part 13 under the front end of the contact plate part 21a. That is, it is preferable to understand that the movable switching part 20 includes the contact plate part 21a and the movable contact part 22. In this case, the contact plate part 21a is preferably formed of a conductive metal material that provides elastic resilience so that the movable contact part 22 is in contact with the fixed contact part 13 so that energization is possible, but is selectively spaced apart.

In addition, the contact plate portion 21a is integrally formed with an inclined support portion that is bent and extended upwardly to have an obtuse angle from the rear end. In this case, a support spring 569, which will be described later, is in contact with the lower surface of the inclined support part, so that the contact plate part 21a may be elastically supported.

Meanwhile, the crossbar 30 is provided to press the front end portion of the contact plate portion 21a downward. Here, the crossbar 30 is provided on the front end side of the contact plate portion 21a, and a trip driving groove into which the contact plate portion 21a is inserted is formed.

In addition, the crossbar 30 is preferably connected to the contact plate portion 21a so as to selectively press the front end portion of the contact plate portion 21a downward. Here, a rotation center protrusion providing a reference rotation axis may protrude from the center side of the contact plate part 21a. In addition, the crossbar 30 is preferably coupled to the rotation center protrusion so as to selectively press the front end of the contact plate portion 21a downward.

In addition, a seating groove portion may be recessed in the upper portion of the crossbar 30 so that the pressure rod portion 83 connected to the lower portion of the handle portion 80 is seated and fixed. Such a crossbar 30 is pressed downward by a pressing force applied from the upper side through the handle part 80, and is integrally with the handle part 80 upward through the elastic means 80a of the handle part 80. It is elastically supported. A description of the link structure of the handle unit 80 will be described later.

Here, the crossbar 30 may be driven so that the contact plate portion 21a rotates with the rotation center protrusion as a rotation center point. Through this, the contact plate part 21a may be selectively pressed downward or moved upward by the driving force of the crossbar 30 to be contact-connected or separated from the load output part 12. Of course, in some cases, the crossbar may be provided to move upward and downward so that the contact plate portion 21a may be selectively connected to or disconnected from the load output portion 12.

Meanwhile, a case in which the overcurrent sensing means includes a coil 40 and a magnetic core 41 in an embodiment of the present invention is illustrated and described as an example. Here, the coil 40 is electrically connected between the rear portion of the contact plate portion 21a and the load output portion 12, and is disposed surrounding the outer circumference of the magnetic core 41 that selectively forms a magnetic attraction force. .

In detail, one end of the coil 40 is electrically connected to the rear part of the contact plate part 21a through a connection wire, and the other end is electrically connected to the load output part 12. Therefore, when power is supplied through the power input unit 11 when the front end of the contact plate part 21a is pressed downward and the fixed contact part 13 and the movable contact part 22 are in contact with each other, the contact plate part (21a), through the coil 40, a current flows to the load output unit 12.

In addition, the magnetic core 41 is formed of a metallic material such as iron having conductivity, and may be provided in a cylindrical shape. In this case, the magnetic core 41 is disposed in the vertical direction of the housing unit 10 between the power input unit 11 and the load output unit 12 and may be mounted and fixed to the yoke 560.

Here, the coil 40 is wound on the outer surface of the magnetic core 41. At this time, magnetic force may be formed in the magnetic core 41 by the coil 40 wound on the outer surface, and the armature 550 is formed by the magnetic force of the magnetic core 41. It may be sucked to come into contact with the suction contact part 41a formed on the upper end. In addition, when the armature 550 is sucked into the magnetic core 41, a trip operation to be described later may be performed as the armature 550 pushes the trip bar 75 to be described later to the front.

Meanwhile, the armature 550 is disposed between the power input unit 11 and the load output unit 12, and is disposed at the rear side of the trip bar 75. Here, the armature 550 is formed of a conductive metal material, and includes a base portion 551, the driving end 552, and the suction end 553. In detail, the base portion 551 is disposed in the vertical direction of the housing portion 10 and is provided so that the driving end portion 552 and the suction end portion 553 are integrally connected. In addition, the driving end 552 extends downward on one side of the lower end of the base part 551 in the width direction, and the spring alignment part 554 extends downward to the other side of the lower end in the width direction.

At this time, the driving end 552 and the spring alignment unit 554 are spaced apart from each other at a widthwise distance, and an alignment groove is formed between the driving end 552 and the spring alignment unit 554. Here, a return spring 555 is disposed on the side of the alignment groove, and the return spring 555 is disposed on the front side of the yoke 560, and both ends are connected to the armature 550 and the yoke 560 so that the armature After 550 is sucked and rotated by the magnetic core 41, an elastic restoring force capable of restoring a position is provided. At this time, the return spring 555 is provided in a hook shape at both ends, the upper end is connected to the upper engaging hole 551b formed in the base portion 551, and the lower end is engaged with the lower engaging hole formed in the yoke 560 Can be connected. Through this, the return spring 555 can be easily mounted so that the armature 550 and the yoke 560 are connected without a separate bonding process.

Here, the elastic restoring force of the return spring 555 is preferably set to be smaller than the magnetic force formed in the magnetic core 41. Through this, the suction end 553 may be sucked to come into contact with the suction contact part 41a when the magnetic force of the magnetic core 41 is applied.

Meanwhile, the driving end 552 extends from one side in the width direction of the lower end of the base part 551 to a length corresponding to the position of the trip bar 75. Through this, when the suction end 553 is sucked by the magnetic force of the magnetic core 41, the driving end 552 rotates the latch part 70 to perform a trip operation. Can be contacted under pressure.

On the other hand, the suction end 553 is bent from the upper end of the base portion 551 and is obliquely extended upward toward the rear side. At this time, the suction end 553 may be formed to have a width corresponding to the diameter of the suction contact portion 41a, and is disposed so that the lower surface thereof faces the upper surface portion of the suction contact portion 41a.

Here, the suction end 553 is inserted into the mounting groove 561 of the yoke 560 and supported on the upper end of the yoke 560 in the width direction adjacent to the portion bent from the upper end of the base 551 In the yoke mounting groove (553a) may be formed respectively recessed in the width direction inward. In addition, the width of the yoke mounting groove 553a may be set to exceed the thickness of the yoke 560. Here, the armature 550 may be disposed so that the suction end 553 is rotatably supported in the mounting groove 561 formed at the upper end of the yoke 560. Through this, the armature 550 may be driven by a seesaw as a rotation support point supported by the edge of the mounting groove 561.

That is, the suction end 553 may be rotated as a rotation support point by a portion supported on the edge of the mounting groove 561 by magnetic force formed from the coil 40 when an overcurrent occurs, so that it may be sucked into the suction contact part 41a. . At this time, the driving end 552 may push the trip bar 75 forward as it rotates integrally with the suction end 553 in response to the rotation angle of the suction end 553, and the latch part The trip operation can be performed by rotating 70.

Meanwhile, the yoke 560 may be provided in a plate shape having a predetermined thickness and is preferably formed of a metal material having conductivity. In addition, the yoke 560 may be spaced apart from the front of the magnetic core 41 so as to be parallel to the magnetic core 41 and extend in the vertical direction. In this case, the yoke 560 is disposed between the armature 550 and the magnetic core 41 and may be coupled to be fixed to the housing unit 10. Here, the mounting groove 561 is formed at the upper end of the yoke 560. In detail, the mounting groove 561 may be depressed downward from the upper end of the yoke 560 to a preset width, and formed at the center of the upper end of the yoke 560 so that the yoke 560 viewed from the front has a'Y' shape It can be formed as

In this case, the width of the mounting groove 561 may be set to correspond to the width of the portion of the suction end 553 in which the yoke mounting groove 553a is formed. Through this, when the suction end 553 is inserted into the mounting groove 561, the edge of the suction end 553 may be slid and inserted into the yoke mounting groove 553a. In addition, the suction end 553 may have a width in which the yoke mounting groove 553a exceeds the thickness of the yoke 560. Accordingly, even if the armature 550 is sucked by the magnetic force of the magnetic core 41, the armature 550 may be spaced so as to be rotated using a portion supported on the edge of the mounting groove 561 as a rotation axis. That is, the armature 550 may be rotatably supported on the upper end of the yoke 560 so that the suction end 553 is accurately sucked into the suction contact part 41a by the magnetic force of the magnetic core 41. .

On the other hand, the yoke 560 is provided with a separation preventing protrusion 562 protruding toward the inside of the mounting groove 561 from the inner edge of the inlet side of the mounting groove 561. Here, the inner edge of the inlet side of the mounting groove 561 is preferably understood as an edge of the opened portion of the mounting groove 561 adjacent to the upper end of the yoke 560. In addition, the separation preventing protrusion 562 may protrude from at least one side of the inner rims facing each other of the mounting groove 561.

In this case, the separation preventing protrusion 562 may be formed to have a thickness corresponding to the thickness of the yoke 560 and may be substantially formed in a continuous contour from the upper end of the yoke 560. In addition, the separation preventing protrusion 562 may be formed to have a height at which the side portion of the suction end 553 is caught at the lower end in a normal state. Here, the normal state is preferably understood as a state in which overcurrent does not occur, and the suction end 553 may be maintained in a state in which the suction end 553 is inclined toward the upper side toward the rear side by the restoring force of the return spring 555. have. That is, the detachment preventing protrusion 562 serves to restrain the suction end 553 from being caught and prevent detachment from the mounting groove 561.

Through this, the armature 550 is sucked into the magnetic core 41 due to an external shock or overcurrent, and then the position is restored by the return spring 555 by the departure preventing protrusion 562. Since it is prevented from being arbitrarily separated from the mounting groove 561, assembling property and durability may be further improved.

Further, the support spring 569 is mounted and provided at the lower end of the yoke 560. Here, the support spring 569 is provided including a contact portion and an elastic portion. In detail, the contact portion is provided to have a width greater than or equal to the width of the inclined support portion to stably support the lower surface of the inclined support portion, and is disposed along the width direction, and may be hooked to the lower surface of the inclined support portion. Through this, the contact portion may be kept in a stable contact with the inclined support portion.

In addition, the elastic portion is provided at both ends of the contact portion, respectively, and each elastic portion is connected by bending and extending a lower end portion from both ends of the contact portion. In this case, the elastic portion may have a hollow formed in the central portion, and may be wound in a spiral so that the central axis corresponds to the width direction of the contact portion, and when a pressing force is applied to the contact portion, an elastic recovery force may be provided. Further, the locking mounting portion 565 of the yoke 560 is inserted into the hollow of each elastic portion so that the support spring 569 may be mounted on the lower end of the yoke 560.

Meanwhile, the locking mounting portion 565 is provided at the lower end of the yoke 560 so that the support spring 569 is mounted. In detail, fixing cover portions 564 may be provided on both sides of the lower end of the yoke 560, respectively. Here, each of the fixed cover portions 564 may integrally extend from both sides of the lower end portion of the yoke 560 toward the front side. In this case, each of the fixed cover portions 564 may extend so that the lower end is disposed further below the body lower end of the yoke 560. In addition, the locking mounting portion 565 may be provided at a lower end of each of the fixing cover portions 564. Here, the interval between the facing surfaces of each of the locking mounting portions 565 may be set to be less than the interval between the outer portions of each of the elastic portions. Here, each of the locking mounting portions 565 extends in a direction facing each other from a lower end of each of the fixing cover portions 564. In this case, the width of the locking mounting portion 565 may be set to be greater than or equal to the width of the elastic portion. In addition, when the locking mounting portion 565 is inserted into the hollow side of the elastic portion, the hollow inner surface of the elastic portion may contact the locking mounting portion 565 to be stably mounted.

Meanwhile, a pair of spring support grooves may be formed at the lower end of the yoke 560. In detail, each of the spring support grooves may be formed to be spaced apart from each other on one side and the other side in the width direction of the lower end of the yoke 560. In addition, the spacing between each of the spring support grooves may be set to correspond to the spacing between the outer portions of each of the elastic parts.

In this case, the upper end of the support spring 569 may be inserted into each of the spring support grooves to be supported. Here, the upper end of the support spring 569 is preferably understood as an end extending from the elastic portion in the opposite direction to the contact portion. In addition, the upper end of the support spring 569 may be inserted into the spring support groove while the locking mounting part 565 is inserted into the hollow of the elastic part to be supported. Through this, when the pressing force is applied to the contact portion, the elastic portion is in a state that the upper end side is constrained by the spring support groove, so that an elastic restoring force may be provided to the contact portion.

Here, the support spring 569 may be mounted on the locking mounting portion 565 in the following manner. First, pressure is applied in a direction facing each other so that the spacing between the elastic parts is narrowed. In addition, after inserting each of the elastic parts between opposite surfaces of each of the locking mounting parts 565, the pressurized state is released. At this time, in the support spring 569, the elastically deformed bent portion may be restored to its original shape, and the locking mounting portion 565 may be inserted into the hollow of each elastic portion. In addition, by inserting the upper end of the support spring 569 into the spring support groove, mounting of the support spring 569 may be completed.

Accordingly, since the support spring 569 can be easily mounted on the lower end of the yoke 560 by providing a pressing force, assembling property can be further improved. Moreover, since a separate coupling member for fixing the support spring 569 is not required, and an additional process for coupling such as adhesion is omitted, productivity and economy of the product can be remarkably improved. Moreover, since the support spring 569 is not only mounted to the yoke 560 with only elastic resilience force, but also has a structure to elastically support the contact plate portion 21a, the structure is simplified, so that the productivity of the product can be further improved. Of course, the support spring 569 may be mounted such that one locking mounting portion is first inserted into the hollow of one elastic portion of each of the elastic portions, and the other locking mounting portion is inserted into the hollow by pressing the other elastic portion.

Meanwhile, the support spring 569 is mounted on the lower end of the yoke 560 and is disposed at the rear side of the inclined support portion so that the contact portion contacts the lower surface of the inclined support portion. In this case, the support spring 569 may be elastically deformed by rotating the contact portion about the central axis of the elastic portion by the inclined support portion.

Here, as the elastic restoring force of the elastic portion is transmitted to the inclined support portion through the contact portion, the contact plate portion 21a may exert a rotational force based on the rotation center protrusion. At this time, the contact plate part 21a may be more stably maintained in a state in which the movable contact part 22 is in contact with the fixed contact part 13 in a normal state by a rotational force. Accordingly, the contact plate part 21a maintains a stable contact state between the movable contact part 22 and the fixed contact part 13 as a continuous elastic resilience force is provided from the support spring 569, so that the contact between each other Safety accidents such as fires due to defects can be prevented in advance, so the safety of the product can be further improved. Moreover, since the support spring 569 is mounted on the lower end of the yoke 560, a separate structure for mounting on the body (not shown) is not required, so the structure of the product is simplified, so that the productivity of the product can be further improved. I can.

In addition, a core mounting portion 566 extending vertically toward the rear is provided at the lower end of the yoke 560. In detail, the core mounting portion 566 may be integrally extended from the body of the yoke 560 so as to be vertically bent, and a core insertion hole 567 may be formed at an end thereof in a vertical direction. At this time, the inner diameter of the core insertion hole 567 may be set to correspond to the outer diameter of the magnetic core 41, and the lower end of the magnetic core 41 passes through the core insertion hole 567 and is fitted. I can. That is, the coil 40 may be wound on the outer surface of the upper part from the lower part of the magnetic core 41 in a state where the lower part is fitted into the core insertion hole 567. Through this, the magnetic core 41 may be coupled to the core insertion hole 567 and fixed in a state spaced apart from the yoke 560 so as to have a predetermined distance and disposed parallel to each other.

Here, the magnetic core 41 may be reinforced with magnetic force by the yoke 560 and the suction end 553 arranged in parallel. In detail, a magnetic flux is generated when an overcurrent of more than a predetermined reference value flows through the coil 40. At this time, the magnetic flux may be sequentially formed from the lower end of the magnetic core 41 to the core mounting portion 566, the yoke 560, the suction end 553, and the upper end of the magnetic core 41.

And. Magnetic force may be generated in the magnetic core 41 by the magnetic flux. In detail, the magnetic force generated in the magnetic core 41 may be applied in a vertical direction according to Fleming's left-hand rule, and a suction force for pulling the magnetic material may be generated in the suction contact portion 41a. Through this, the suction end portion 553 disposed adjacent to the upper portion of the magnetic core 41 may be sucked by the magnetic force of the magnetic core 41.

Here, the yoke 560 serves as a magnetic flux movement path, that is, a magnetic path, through which the magnetic flux can pass from the lower end to the upper end of the magnetic core 41. Through this, the magnetic core 41 can be formed with sufficient magnetic force to stably attract the suction end 553 to the suction contact part 41a by minimizing dispersion of the magnetic flux by the yoke 560 The driving reliability of the can be further improved.

On the other hand, the housing part 10 includes a handle mounting part 14 on which the trip bar 75, the latch part 70, the cradle 73, and the assembly part 80 are installed, and the housing part 10 It can be mounted on either side of one side and the other side. In this case, a case where the handle mounting portion 14 is disposed on the other side in the width direction of the housing portion 10 in an embodiment of the present invention will be illustrated and described as an example.

Here, the handle mounting portion 14 is formed in an inverted'U' shape including a pair of sidewall surfaces spaced apart from each other, so that the trip bar 75, the latch portion 70, the cradle 73 and the A space for arranging the assembly unit 80 is formed. At this time, a pair of first through holes 14a in which the trip bar 75 is disposed, and a pair of second through holes 14b in which the cradle 73 is disposed on the pair of side wall surfaces of the handle mounting portion 14 , It is preferable that a pair of third through holes 14c in which the pressure rods 83 are disposed are respectively formed through symmetrical positions. In addition, a first alignment hole 14d into which the latch rotation shaft 71 of the latch part 70 is inserted, and a cradle rotation shaft 73b of the cradle 73 are inserted into the pair of sidewall surfaces of the handle mounting part 14 It is preferable that the second alignment holes 14e are formed through each other at positions symmetrical to each other.

Meanwhile, the trip bar 75 may have a length corresponding to the width of the housing unit 10 and have a cylindrical shape of an insulating material and may be disposed along the width direction of the housing unit 10. Here, the trip bar 75 is preferably disposed so that the outer portion faces the lower front surface of the driving end portion 552 and moves back and forth in the first through hole 14a of the handle mounting portion 14. In this case, the first through hole 14a is formed under the side wall surface of the handle mounting portion 14 and may be elongated in the front-rear direction. In addition, the trip bar 75 has an outer end in the width direction exposed to the outer side in the width direction of the first through hole 14a, and an inner end in the width direction is disposed inside the handle mounting portion 14.

In addition, the latch portion 70 is disposed in the vertical direction inside the handle mounting portion 14, the trip bar 75 is connected to the lower end, and the center portion of the first alignment hole of the handle mounting portion 14 ( It is provided to rotate back and forth based on the latch rotation shaft 71 hinged to 14d). In this case, the first alignment hole (14d) is preferably disposed above the first through hole (14a). Here, it is preferable that a latch restoration part 70a is provided on the latch rotation shaft 71 to provide an elastic restoration force when the latch part 70 rotates.

In addition, it is preferable that a latch engaging protrusion 72 protruding downward from an end protruding protruding forwardly is formed on the upper portion of the latch part 70. In this case, it is preferable that the latch engaging protrusion 72 is engaged with the upper front side of the cradle 73 in a state in which the cradle 73 is disposed behind the second through hole 14b.

On the other hand, the upper front side of the cradle 73 is selectively engaged with the latch engaging protrusion 72 formed on the upper side of the latch part 70, and the lower end is the second alignment hole 14e of the handle mounting part 14 It is preferable to be provided to rotate back and forth based on the cradle rotation shaft (73b) hinged to. In this case, the second alignment hole 14e is preferably disposed below the second through hole 14b. In addition, it is preferable that the guide protrusion 73a protrudes backwards so that the end of the latch engaging protrusion is selectively contacted and guided above the cradle 73.

In addition, one side of the engaging link 74 is hingedly connected to the central portion in the vertical direction of the cradle 73, and one side of the engaging link 74 is the cradle 73 from an outer side in the width direction of the second through hole 14b. ) Is preferably inserted into the hinge connection.

Here, the locking link 74 may be provided to be bent in a'c' shape, and the other side of the locking link 74 is the lower end of the first link unit 81 and the second link unit 82 to be described later. ) It is preferable that the hinge is connected between the tops.

In addition, the handle unit 80 is hinged to the handle mounting unit 14 and coupled to be rotated back and forth, and is linked to the lower portion through the cradle 73 and the locking link 74, but according to the rotation direction, the It is preferable that the link portions 81 and 82 for pressing the crossbar 30 downward are connected.

Here, the link portions 81 and 82 have an upper end hinged to the lower end of the handle unit 80, and the lower end is hinged to the upper end of the second link unit 82 using the locking link 74 as a rotation axis. It is preferable to include the first link unit 81 to be connected.

At this time, a handle restoring means (80a) is provided at the lower end of the handle unit 80 and at the upper end of the first link unit 81 as a torsion spring, so that the handle unit 80 moves in the rearward direction in the current blocking direction. It can provide elastic resilience. Here, the central hollow of the handle restoring means (80a) is inserted into the shaft connecting the handle portion 80 and the handle mounting portion 14 to the hinge, but the fixed end is fixed to the handle mounting portion 14, and the free end The lower end of the handle unit 80 and the upper end of the first link unit 81 may be connected to each other by a hinge connection.

In addition, the link portions 81, 82 have an upper end hingedly connected to the lower end of the first link portion 81, and the pressure rod portion 83 inserted into the seating groove of the crossbar 30 is connected to the lower end. It is preferable to include the second link unit 82.

Here, the pressure rod portion 83 may be inserted through the third through hole 14c along the width direction. At this time, the third through-hole so that the pressure rod part 83 presses the crossbar 30 so that the movable switching part 20 is selectively moved up and down so that the movable switching part 20 is gradually connected and separated from the power input part 11. (14c) is preferably extended in the vertical direction under the side wall surface of the handle mounting portion 14.

On the other hand, it is preferable that the spring fixing protrusion 14f extends outward in the width direction on the outer surface of the handle mounting portion 14 in the width direction. At this time, the protrusion length of the spring fixing protrusion 14f may be set to exceed the diameter of the locking link 74.

In addition, the breaker 600 further comprises a restoring means 84 provided as a coil spring, etc. so that the upper end is connected to the spring fixing protrusion 14f, and the lower end is connected to the pressure rod 83 Do. At this time, the restoration means 84 is preferably provided so that the pressure rod portion 83 is elastically restored to the upper side.

Meanwhile, a state of use in a normal state in which the overcurrent of the circuit breaker 600 does not occur will be described.

First, in the initial state in which the pressure rod part 83 is disposed on the upper end of the third through hole 14c, the handle part 80 so that the latch engaging protrusion 72 is caught on the upper front side of the cradle 73. ) Is rotated backwards. Accordingly, as the locking link 74 is interlocked with the rear end of the second through hole 14b, the latch engaging protrusion 72 is caught on the upper front side of the cradle 73. In this case, it is preferable to understand that the trip operation is not performed even when the trip bar 75 is moved when the latch engaging protrusion 72 is not caught on the upper front side of the cradle 73.

And, when the handle portion 80 is rotated forward while the latch engaging protrusion 72 is engaged with the upper front side of the cradle 73, the rear portion of the engaging link 74 is the second through hole. As the front portion of the locking link 74 rotates downward while being fixed to the rear end of (14b), the pressure rod portion 83 interlocked therewith is pressed and moved to the lower end of the third through hole 14c. Accordingly, the pressure rod part 83 presses the crossbar 30 downward so that the front end of the contact plate part 21a is rotated interlockingly, so that the movable contact part 22 and the fixed contact part 13 are connected to each other. do.

In addition, when the handle portion 80 is rotated from the front to the rear in a state where the latch engaging projection 72 is engaged with the upper front side of the cradle 73, the rear portion of the engaging link 74 is As the front portion of the locking link 74 is rotated upward in a state fixed to the rear end of the through hole 14b, the pressure rod portion 83 interlocked therewith is penetrated by the elastic recovery force of the restoring means 84. It moves to the top of the ball 14c. Accordingly, the pressure of the crossbar 30 by the pressure rod portion 83 is released, and the front end of the contact plate portion 21a is rotated interlockingly, so that the movable contact portion 22 and the fixed contact portion 13 are mutually Separated.

Meanwhile, a state of use of the circuit breaker 600 when an overcurrent occurs will be described.

In detail, the latch engaging protrusion 72 is caught on the upper front side of the cradle 73 and the handle part 80 is rotated forward so that the movable contact part 22 and the fixed contact part 13 are mutually contacted. In the connected state, when an overcurrent occurs in the coil 40, the suction end 553 is rotated by suction to the suction contact part 41a of the magnetic core 41, thereby rotating integrally with the suction end 553. The driving end 552 presses the trip bar 75 forward.

In addition, when the trip bar 75 is pressed forward, the upper end of the latch part 70 and the latch engaging protrusion 72 are rotated rearward around the latch rotation shaft 71. Here, when the latch engaging protrusion 72 is separated from the upper front side of the cradle 73 as the latch engaging protrusion 72 is rotated, the rear portion of the engaging link 74 is momentarily expelled from the rear end of the second through hole 14b to the front end. It is moved by restoring force. At this time, the upper end of the latch restoring part 70a is engaged with the upper and rear side of the latch part 70, but the lower end of the latch restoring part 70a is engaged with the rear part of the retaining link 74 to provide elastic resilience. In addition, when the rear portion of the locking link 74 is moved to the front end of the second through hole 14b, the lower end of the latch restoration portion 70a may be disposed in a state that is engaged with the cradle rotation shaft 73b.

Accordingly, when the rear portion of the engaging link 74 is momentarily moved from the rear end of the second through hole 14b to the front end by the elastic recovery force, the pressing rod portion 83 is the elastic recovery force of the restoration means 84 Is moved to the upper end of the third through hole 14c, the pressure of the crossbar 30 by the pressure rod part 83 is released, and the front end of the contact plate part 21a is rotated interlockingly to the movable contact part (22) and the fixed contact portion 13 are separated from each other. At the same time, the handle portion 80 is elastically restored and rotated to the rear side. Through this, when an overcurrent occurs, the movable contact part 22 and the fixed contact part 13 may be momentarily separated from each other.

On the other hand, the temperature-sensing bimetal 590 is a fixed end at the top of one side in the width direction of the yoke 560 disposed between the coil 40 and the driving end 552 to reinforce the magnetic force of the magnetic core 41 Doedoe 591 is coupled and fixed, the free end 592 from the fixed end 591 extends toward the other side in the width direction of the yoke 560 and is disposed opposite to the front side of the suction end 553. At this time, the temperature sensing bimetal 590 is preferably understood as the fixed end 591 and the free end 592 are integrally formed with each other.

In addition, when the ambient temperature of the housing unit 10 rises above a preset safe temperature, the temperature sensing bimetal 590 is configured to bend the free end 592 with respect to the fixed end 591. When the driving end 552 is rotated by pressing the suction end 553 downward, the trip bar 75 is pushed forward and interlocked, so that the contact plate 21a is separated from the power input unit 11 so that the rear surface is It is formed with a lower coefficient of thermal expansion than the front surface. In this case, the ambient temperature of the housing unit 10 is preferably understood as a concept encompassing the air temperature inside the housing unit 10 and the temperature of each component disposed inside the housing unit 10.

For example, the temperature-sensing bimetal 590 may be provided by having a flat plate made of a copper material disposed on the front side and a flat plate made of an iron material having a lower coefficient of thermal expansion than that of a copper material disposed on the rear side and bonding to each other. Accordingly, when the ambient temperature of the housing part 10 rises above a preset safe temperature, the free end 592 in the state where the fixed end 591 of the temperature sensing bimetal 590 is fixed to the yoke 560 This can be thermally deformed by bending backwards.

At this time, the preset safety temperature may be set to 70 ~ 100 ℃, most preferably set to 80 ℃. That is, when the ambient temperature of the housing unit 10 is increased rather than due to an overcurrent, the contact plate unit 21a is separated from the power input unit 11 as the temperature sensing bimetal 590 is bent and thermally deformed. I can.

That is, the temperature sensing bimetal 590 presses the suction end 553 of the armature 550 when the ambient temperature of the housing unit 10 rises above a preset safety temperature, thereby performing an interlocked trip operation. It is a device that blocks the flow. In other words, independent of the function of blocking the current flow when the suction end 553 of the armature 550 generates an overcurrent, the temperature sensing bimetal when the ambient temperature of the housing 10 rises above a preset safety temperature ( 590) can be operated.

On the other hand, it is preferable that the locking protrusion 556 is integrally protruded upwardly on the front side of the upper surface of the suction end 553. In this case, the cross section of the locking protrusion 556 may be formed in a rectangular shape, but is not limited thereto.

In addition, in the front portion of the locking protrusion 556, an inclined contact surface 556a is formed to be inclined downwardly toward the front, and the inclined contact surface 556a is preferably disposed opposite to the rear side of the free end 592.

Here, when the ambient temperature of the housing unit 10 rises above a preset safe temperature, the free end 592 is bent backwards based on the fixed end 591 to press the inclined contact surface 556a downward. , The free end 592 is preferably disposed opposite to the inclined contact surface 556a in a flat plate shape when the ambient temperature of the housing 10 is less than a preset safety temperature.

Accordingly, even when the free end 592 presses the inclined contact surface 556a and the suction end 553 rotates integrally, the contact between the free end 592 and the inclined contact surface 556a continues Can be maintained.

On the other hand, it is preferable that a first fixing hole 568a is formed at an upper end of one side in the width direction of the yoke 560 through a coupling portion 568 formed therethrough in the front and rear direction. In this case, the coupling portion 568 is preferably protruded upwardly to have a predetermined width from an upper end of one side in the width direction of the yoke 560.

In addition, it is preferable that a second fixing hole 591a is formed through the fixing end 591 so as to be aligned with the first fixing hole 568a. In addition, it is preferable that the breaker 600 further includes a fastening member 593 fastened to the first fixing hole 568a and the second fixing hole 591a.

Here, the fixed end 591 is in surface contact with the rear surface of the coupling part 568, and the free end 592 is preferably disposed from the fixed end 591 toward the other side in the width direction of the yoke 560 Do. In this case, a space is formed between an upper end of one side in the width direction and an upper end of the other side of the yoke 560 so that the rear side of the free end 592 may be disposed opposite to the upper front side of the suction end 553.

Further, the free end 592 may have an extended end protruding stepwisely extending from the upper end toward the other side in the width direction of the yoke 560.

In addition, a seating portion 568b is formed at the upper end of the other side in the width direction of the yoke 560 so that the lower surface of the extended end portion is seated and supported, and the seating portion 568b is formed at a lower position than the coupling portion 568 desirable.

Meanwhile, referring to FIGS. 1 to 3, the latch engaging protrusion 72 is caught on the upper front side of the cradle 73, and the handle unit 80 is rotated forward. When the ambient temperature is less than a preset safety temperature, the free end 592 is disposed opposite to the inclined contact surface 556a in a flat plate shape, and the front surface of the driving end 552 is disposed opposite to the rear side of the trip bar 75 And the fixed contact part 13 and the movable contact part 22 are maintained in a contact-connected state.

And, referring to Figures 4 to 5, the latch engaging protrusion 72 is caught on the upper front side of the cradle 73, and the handle unit 80 is rotated to the front of the housing unit 10 When the ambient temperature is greater than or equal to a predetermined safety temperature, the free end 592 of the temperature sensing bimetal 590 is subjected to a backward bending thermal deformation based on the fixed end 591 by a thermal expansion coefficient. At this time, it is preferable to understand that the armature 550 is not rotated when no overcurrent occurs and maintains an initial state.

Subsequently, when the inclined inclined contact surface 556a is pressed backward as the free end 592 of the temperature-sensing bimetal 590 is bent and thermally deformed backward, the suction end 553 is pressed downward, and the driving end 552 The trip bar (75) as the armature 550 including) is integrally rotated around the base portion 551 and the driving end portion 552 pushes and presses the trip bar 75 forward. Is pushed forward and is moved to the front side of the first through hole 14a.

Through this, when the trip bar 75 is pushed forward, the upper end of the latch unit 70 and the latch engaging protrusion 72 are rotated rearward around the latch rotation shaft 71. Here, when the latch engaging protrusion 72 is separated from the upper front side of the cradle 73 as the latch engaging protrusion 72 is rotated, the rear portion of the engaging link 74 is momentarily expelled from the rear end of the second through hole 14b to the front end. It is moved by restoring force. At this time, the upper end of the latch restoring part 70a is engaged with the upper and rear side of the latch part 70, but the lower end of the latch restoring part 70a is engaged with the rear part of the retaining link 74 to provide elastic resilience. In addition, when the rear portion of the locking link 74 is moved to the front end of the second through hole 14b, the lower end of the latch restoration portion 70a may be disposed in a state that is engaged with the cradle rotation shaft 73b.

Accordingly, when the rear portion of the engaging link 74 is momentarily moved from the rear end of the second through hole 14b to the front end by the elastic recovery force, the pressing rod portion 83 is the elastic recovery force of the restoration means 84 Is moved to the upper end of the third through hole 14c, the pressure of the crossbar 30 by the pressure rod part 83 is released, and the front end of the contact plate part 21a is rotated interlockingly to the movable contact part (22) and the fixed contact portion 13 are separated from each other. At the same time, the handle portion 80 is elastically restored and rotated to the rear side. Through this, when an overcurrent occurs, the movable contact part 22 and the fixed contact part 13 may be momentarily separated from each other.

That is, when the ambient temperature of the housing part 10 is higher than a preset safety temperature, the temperature sensing bimetal 590 presses the suction end 553 and the tripping operation of the trip part 75 causes the latch locking stone The locking between the device 72 and the upper front side of the cradle 73 is released, and the fixed contact part 13 and the movable contact part 22 are separated from each other, regardless of the on/off state of the breaker 600 Current flow is quickly cut off.

At this time, even if the user arbitrarily manipulates and rotates the handle unit 80, the free end 592, which is bent and deformed backwards with respect to the upper end of the fixed end 591, presses the inclined contact surface 556a backward to suck the suction. The end 553 is pressed downward so that the driving end 552 presses the trip bar 75 forward, so that the latch engaging protrusion 72 is engaged with the upper front side of the cradle 73 ( The movement of 75) to the rear side of the first through hole 14a is blocked. Accordingly, the fixed contact part 13 and the movable contact part 22 are kept separated from each other.

And, when the ambient temperature of the housing unit 10 re-falls from a preset safe temperature or higher to less than a preset safe temperature, the free end 592 of the temperature sensing bimetal 590 in a backward bending and deformed state is turned to an initial state. It is restored, the suction end 553 and the driving end 552 are restored to their initial state, and the trip bar 75 is moved to the rear side of the first through hole 14a.

As such, the width of the yoke 560 disposed between the coil 40 and the driving end 552 so that the magnetic force of the magnetic core 41 is reinforced in the armature locking type temperature sensing circuit breaker 600 according to the present invention. A fixed end 591 is coupled and fixed to the coupling portion 568 formed at the upper end of the direction, and the free end 592 extends toward the other side in the width direction of the yoke 560 and is at the front side of the suction end 553. A temperature sensing bimetal 590 is disposed opposite and has a lower thermal expansion coefficient than the front.

Through this, when the ambient temperature of the housing part 10 rises above a preset safe temperature, the free end 592 is formed in the suction end 553 as the free end 592 is bent backwards based on the fixed end 591. When the driving end 552 is rotated by pressing the inclined contact surface 556a backward, the trip bar 75 is pushed forward and interlocked, so that the contact plate 21a is spaced apart from the power input unit 11 to flow current. Block.

Therefore, when the ambient temperature of the housing unit 10 rises above a preset safe temperature, the free end 592 is bent backwards based on the fixed end 591 of the temperature sensing bimetal 590 fixed to the yoke 560 As the thermal deformation is performed, the driving end 552, which is rotated interlockingly, pushes the trip bar 75 forward when pressing the locking protrusion 556 of the suction end 553 backward, and the trip operation is instantaneously performed. Since the contact plate part 21a is rotated and separated from the power input part 11, it is possible to prevent a secondary safety accident by automatically blocking current flow in case of a fire. Through this, the safety of use of the product can be remarkably improved.

In addition, the inclined contact surface 556a is formed to be inclined downwardly toward the front of the locking protrusion 556, which is integrally protruded upwardly on the front side of the upper surface of the suction end 553, so that the rear side of the free end 592 It is placed opposite to. Therefore, since the pressing force of the free end 592, which is bent and deformed backwards by the thermal expansion coefficient, is stably transmitted to the suction end 553 and the driving end 552, operation precision can be remarkably improved.

In addition, the free end 592 is disposed opposite to the inclined contact surface 556a in the form of a flat plate when the ambient temperature of the housing part is less than a preset safety temperature, so that the ambient temperature of the housing part 10 is higher than a preset safe temperature. When rising, the inclined contact surface 556a is pressurized by bending backwards based on the fixed end 591 by the coefficient of thermal expansion. Therefore, even if the user arbitrarily rotates the handle unit 80, the latch locking protrusion 72 by the free end 592 is blocked from being caught on the upper front side of the cradle 73, and the fixed contact Since the part 13 and the movable contact part 22 are kept separated from each other, current is cut off, the safety of use can be remarkably improved.

Moreover, the first fixing hole 568a formed through the coupling portion 568 at the upper end of the width direction of the yoke 560 in the front and rear direction and the second fixing hole 591a formed through the fixing end are aligned. In a simple assembly structure in which the temperature sensing bimetal 580 is installed on the yoke 560 through the fastening member 593, assembling property and productivity can be significantly improved.

In addition, in the free end 592, the lower surface of the extended end protruding stepwisely extending from the upper end of the yoke 560 is seated on the seating portion 568b formed on the other side in the width direction of the yoke 560, so the free end 592 The operation precision can be improved by accurately guiding the rotation direction during the forward and backward bending deformation.

At this time, the terms such as "include", "consist", "have" or "have" described above mean that the corresponding component can be present unless otherwise stated otherwise, It should be construed as not excluding components, but as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by those of ordinary skill in the art, unless otherwise defined. Terms generally used, such as terms defined in the dictionary, should be interpreted as being consistent with the meaning of the context of the related technology, and are not interpreted in an ideal or excessively formal meaning 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 and implemented by those of ordinary skill in the art without departing from the scope claimed in the claims of the present invention. And, these modifications are within the scope of the present invention.

10: housing part 11: power input part
12: load output unit 20: movable switching unit
30: crossbar 40: coil
41: magnetic core 550: amateur
560: yoke 70: latch portion
73: cradle 75: trip bar
80: handle part 590: temperature sensing bimetal
600: armature jammed temperature sensing circuit breaker

Claims (5)

A housing portion provided to be spaced apart from the front and rear sides of the power input unit and the load output unit;
A movable switching unit provided with a contact plate selectively contacted to the power input unit for selective power connection between the power input unit and the load output unit;
A crossbar connected to the contact plate to selectively press the contact plate;
When an overcurrent occurs in the overcurrent detecting means electrically connected between the rear portion of the contact plate portion and the load output portion, a suction end portion which is sucked and rotated toward the overcurrent detecting means, and a drive extending downwardly bending integrally from the front end side of the suction end portion An armature including an end;
A trip bar disposed opposite to the lower front surface of the driving end and disposed to move back and forth to a handle mounting portion provided in the housing portion;
A latch part having the trip bar connected to the lower end and having a central part rotated back and forth with respect to a latch rotation shaft connected to the handle mounting part;
A cradle having an upper end selectively engaged with an upper portion of the latch portion, and having a lower end thereof rotated back and forth based on a cradle rotation axis connected to the handle mounting portion;
A handle portion coupled to the handle mounting portion provided in the housing portion so as to be rotated forward and backward, and connected to a link with the cradle at a lower portion thereof, and a link portion configured to press the crossbar downward in a rotation direction; And
A fixed end is coupled and fixed to an upper end of one side in the width direction of the yoke disposed between the overcurrent detecting means and the driving end, and a free end from the fixed end extends toward the other side in the width direction of the yoke and faces the front side of the suction end. It is disposed, and when the ambient temperature of the housing unit rises above a preset safety temperature, the free end is bent and deformed, and the suction end is pressed downward so that the contact plate is separated from the power input unit. Including a temperature sensing bimetal formed of,
A locking protrusion is integrally protruding upwardly extending on the front side of the upper surface of the suction end, and an inclined contact surface is formed in a downward slope toward the front of the locking protrusion, and the inclined contact surface is disposed opposite to the rear side of the free end,
When the ambient temperature of the housing unit rises above a preset safe temperature, the free end is bent backwards based on the fixed end to press the inclined contact surface downward, and the free end has an ambient temperature of the housing unit at a preset safe temperature. If it is less than the armature locking type temperature sensing circuit breaker, characterized in that disposed opposite to the inclined contact surface in the form of a flat plate. delete The method of claim 1,
An upper end of one side in the width direction of the yoke has a first fixing hole formed therethrough in the front and rear direction, and a second fixing hole is formed through the fixing end so as to be aligned with the first fixing hole, and the first fixing hole And a fastening member fastened to the second fixing hole. The method of claim 3,
The free end has an extended end protruding stepwisely extending from the upper end thereof,
A seating portion is formed at an upper end of the other side in the width direction of the yoke so that a lower surface of the extended end portion is seated and supported, and the seating portion is formed at a lower position than the coupling portion. The method of claim 1,
A latch engaging protrusion protruding downward from an end protruding protruding forwardly extending is formed on the upper portion of the latch unit,
The handle mounting portion is formed with a second through hole extending in the front-rear direction by penetrating in the width direction so that the cradle rotates back and forth,
At the top of the cradle, a guide protrusion protrudes rearward so that the end of the latch engaging protrusion contacts and guides while the cradle is disposed in front of the second through hole, and the latch engaging protrusion protrudes the cradle through the second through hole. Armature locking type temperature-sensing circuit breaker, characterized in that in the state of being arranged at the rear of the ball is arranged to be hooked to the upper front side of the cradle.

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