KR102169495B1 - button pressing type temperature detecting circuit breaker - Google Patents

Abstract

The present invention provides a button pressing type temperature detecting circuit breaker, which has a simplified structure and improved stability when emitting heat, including: a housing part having a power input unit and a load output unit disposed at a front portion and a rear portion thereof while being spaced apart from each other; a movable switching unit including a contact plate part selectively contact-connected with the power input unit for selective power connection between the power input unit and the load output unit; a cross-bar connected with the contact plate part to selectively press the contact plate part; a handle unit coupled to a handle mounting part disposed in the housing part such that the handle unit is rotated forward or rearward and connected with a link part to press down the cross-bar in a rotation direction; and a temperature detecting bimetal having a fixed end fixedly coupled to a lower end of the handle unit, and a free end extended rearward from the fixed end. In the temperature detecting bimetal, a top surface has a thermal expansion coefficient lower than that of a bottom surface such that the handle part is rotated together by traction force of the fixed end to separate the contact plate part from the power input unit, when a ceiling part of a cover coupled to a fixed upper portion of the housing part is pressed, as the fixed end is deformed to be curved upward when a surrounding temperature of the housing part is increased to be equal to or greater than a preset safety temperature.

Description

Button pressing type temperature detecting circuit breaker

The present invention relates to a button pressurization type temperature sensing circuit breaker, and more particularly, to a button pressurization 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 to provide a button pressurized 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 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; A handle portion coupled to the handle mounting portion provided in the housing portion so as to be rotated forward and backward, and to which a link portion for pressing the crossbar downward in a rotation direction is connected; And a fixed end is coupled and fixed to the lower end of the handle part, and the free end extends backward from the fixed end, and when the ambient temperature of the housing part rises above a preset safety temperature, the free end is fixed as the free end is bent upward. When pressing the ceiling side of the cover coupled to the upper side of the housing part, the handle part is interlockedly rotated by the traction force of the fixed end, so that the contact plate part is separated from the power input part, so that the upper surface is formed with a lower coefficient of thermal expansion than the lower surface. Including, wherein the cover is formed through a through hole in the vertical direction, is inserted through the through hole, the upper surface is exposed to the outside of the cover, and the lower surface is a high temperature sensing button disposed to face the upper surface of the rear end of the free end. It further includes, wherein the free end is configured to press the high temperature detection button upwardly when the ambient temperature of the housing part rises above a preset safety temperature and is bent upward with respect to the fixed end. Provides a button pressurized temperature sensing circuit breaker, characterized in that the upper surface of the rear end faces the lower surface of the high temperature sensing button and is formed in a straight line when the temperature is less than the set safety temperature.

Through the above solution means, the button pressurization 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 upward and thermally deformed based on the fixed end of the temperature sensing bimetal. When the high temperature sensing button on the top of the cover is pressed, the handle part and the link part As it rotates interlocked by the traction force, it automatically blocks the current flow to prevent secondary safety accidents.

Second, since the upper surface of the rear end of the free end faces to the lower surface of the high temperature sensing button inserted through the through hole of the cover, the high temperature sensing button pops up as the free end is bent upward, so that the ambient temperature of the housing part can be easily checked with the naked eye. When the temperature is lowered, the high temperature detection button can be pressed down and reused, so safety in use can be remarkably improved.

Third, when the extended portion of the free end is bent upwardly and thermally deformed by the coefficient of thermal expansion, the bent contact portion bent and extended at the rear end of the extended portion first presses the high temperature detection button upward, and the handle portion is rotated secondarily by the traction force of the fixed end. Thus, since the contact plate is separated from the power input unit through the link unit, operation precision can be remarkably improved.

Fourth, if the ambient temperature of the housing part is higher than the preset safe temperature, the free end is bent upward by the coefficient of thermal expansion based on the fixed end, presses the high temperature detection button, and the state of the fixed end pulling the handle toward the rear is maintained. Even if it is arbitrarily manipulated, the safety structure in which the fixed contact part and the movable contact part are kept separate and current is cut off can significantly improve safety in use.

1 is a perspective view showing a cover and a housing in a button pressurized temperature sensing circuit breaker according to an embodiment of the present invention.
2 is a perspective view showing a state in which a cover and a housing part of a button pressurized temperature sensing circuit breaker according to an embodiment of the present invention are separated to expose the inside.
3A to 4 are side views showing a state of use of a button pressurized temperature sensing circuit breaker according to an embodiment of the present invention.
5 and 6 are exemplary views showing an assembly process of a button pressurized temperature sensing circuit breaker according to an embodiment of the present invention.

Hereinafter, a button pressure type temperature sensing 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 cover and a housing part in a button pressurized temperature sensing circuit breaker according to an embodiment of the present invention, and FIG. 2 is a cover and a housing part of the button pressing temperature sensing circuit breaker according to an embodiment of the present invention. It is a perspective view showing a state in which the inside is exposed, and FIGS. 3A to 4 are side views showing a state of use of a button pressurized temperature sensing circuit breaker according to an embodiment of the present invention, and FIGS. 5 and 6 are an embodiment of the present invention It is an exemplary view showing the assembly process of the button pressurized temperature sensing circuit breaker according to. In this case, it is preferable to understand that the cover of the button pressurization type temperature sensing circuit breaker is partially shown in FIGS. 2 to 4 and the housing part is separated to show the interior exposed as an example. In FIG. 4, the interior of the handle mounting part is exposed. It is preferable to understand as shown as an example. In addition, it is preferable that the button pressurized temperature sensing circuit breaker and the circuit breaker to be described below are understood to have the same meaning.

As shown in Figures 1 to 6, the button pressurized temperature sensing circuit breaker 200 according to an embodiment of the present invention includes a cover (1), a housing part (10), a movable switching part (20), and a crossbar (30). , It is preferable to include a handle unit 180 and a temperature sensing bimetal 190. In addition, the handle button pressurization type temperature sensing circuit breaker 200 according to an embodiment of the present invention includes an overcurrent sensing means, an armature 50, a yoke 60, a trip bar 75, a latch part 70, and a cradle 73. ) May be further included.

In detail, the housing unit 10 includes an internal space in which the component parts of the circuit breaker 200 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 cover 1 is coupled to the upper side of the housing unit 10, the inside of which communicates with the inner space, and a hole through which the handle unit 180 is exposed and disposed is formed through.

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, 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 183 linked to the lower portion of the handle portion 180 is seated and fixed. Such a crossbar 30 is pressed downward by a pressing force applied from the upper side through the handle part 180, and is integrally with the handle part 180 upward through the elastic means 180a of the handle part 180. It is elastically supported. A description of the link structure of the handle unit 180 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 may be disposed in the vertical direction of the housing unit 10 between the power input unit 11 and the load output unit 12 and mounted on the yoke 60 to be fixed.

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 50 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 50 is sucked into the magnetic core 41, a trip operation to be described later may be performed as the armature 50 pushes the trip bar 75 to be described later to the front.

Meanwhile, the armature 50 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 50 is formed of a conductive metal material, and includes a base portion 51, the driving end 52 and the suction end 53. In detail, the base portion 51 is disposed in the vertical direction of the housing portion 10 and is provided so that the driving end 52 and the suction end 53 are integrally connected. In addition, the driving end 52 extends downward on one side of the lower end of the base part 51 in the width direction, and the spring alignment part extends downward to the other side of the lower end in the width direction.

At this time, the driving end 52 and the spring alignment portion are spaced apart from each other at a widthwise interval, and an alignment groove is formed between the driving end 52 and the spring alignment portion. Here, a return spring 55 is disposed on the side of the alignment groove, and the return spring 55 is disposed on the front side of the yoke 60, and both ends are connected to the armature 50 and the yoke 60, so that the armature 50 provides an elastic restoring force capable of restoring a position after being sucked and rotated by the magnetic core 41. At this time, the return spring 55 is provided in a hook shape at both ends, so that the upper end thereof is hooked to the upper hooking hole formed in the base part 51, and the lower part is hooked and connected to the lower hooking hole formed in the yoke 60. have. Through this, the return spring 55 can be easily mounted so that the armature 50 and the yoke 60 are connected without a separate process such as adhesion.

Here, the elastic restoring force of the return spring 55 is preferably set to be smaller than the magnetic force formed in the magnetic core 41. Through this, when the magnetic force of the magnetic core 41 acts, the suction end 53 may be sucked to contact the suction contact part 41a.

In addition, the driving end 52 extends from one side of the lower end of the base part 51 in the width direction to a length corresponding to the position of the trip bar 75. Through this, when the suction end 53 is sucked by the magnetic force of the magnetic core 41, the driving end 52 rotates the latch part 70 to perform a trip operation. Can be contacted under pressure.

On the other hand, the suction end 53 is bent from the upper end of the base portion 51 and extends obliquely upward toward the rear side. At this time, the suction end 53 may be formed to have a width corresponding to the diameter of the suction contact portion (41a), and the lower surface portion is disposed to face the upper surface portion of the suction contact portion (41a).

Here, the suction end 53 is inserted into the mounting groove of the yoke 60 and mounted on both sides in the width direction adjacent to the portion bent from the upper end of the base portion 51 so as to be supported on the upper end of the yoke 60 The grooves 53a may be respectively recessed in the width direction. In addition, the width of the yoke mounting groove (53a) may be set to exceed the thickness of the yoke (60). Here, the armature 50 may be disposed so that the suction end 53 is rotatably supported in the mounting groove formed at the upper end of the yoke 60. Through this, the armature 50 can be driven by a seesaw as a rotation support point supported by the edge of the mounting groove.

That is, the suction end 53 may be rotated as a rotation support point by a magnetic force formed from the coil 40 by a magnetic force formed from the coil 40 and sucked into the suction contact part 41a. At this time, the driving end 52 may push the trip bar 75 forward as it rotates integrally with the suction end 53 in response to the rotation angle of the suction end 53, and the latch part The trip operation can be performed by rotating 70.

Meanwhile, the yoke 60 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 60 may be spaced apart in 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 60 is disposed between the armature 50 and the magnetic core 41 and may be coupled to be fixed to the housing unit 10. Here, the mounting groove is formed at the upper end of the yoke 60. In detail, the mounting groove may be recessed downward from the upper end of the yoke 60 to a predetermined width, and is formed in the center of the upper end of the yoke 60 so that the yoke 60 viewed from the front is formed in a'Y' shape. I can.

In this case, the width of the mounting groove may be set to correspond to the width of the portion of the suction end 53 where the yoke mounting groove 53a is formed. Through this, when the suction end 53 is inserted into the mounting groove portion, the edge portion of the suction end 53 may be slid and inserted into the yoke mounting groove 53a. In addition, the suction end 53 may have a width in which the yoke mounting groove 53a exceeds the thickness of the yoke 60. Therefore, even if the armature 50 is sucked by the magnetic force of the magnetic core 41, the armature 50 may be spaced so as to be rotated using a portion supported by the edge of the mounting groove as a rotation axis. That is, the armature 50 may be rotatably supported on the upper end of the yoke 60 so that the suction end 53 is accurately sucked into the suction contact part 41a by the magnetic force of the magnetic core 41. .

On the other hand, the yoke 60 is provided with a separation preventing protrusion protruding toward the inside of the mounting groove from the inner edge of the inlet side of the mounting groove. Here, the inner edge of the inlet side of the mounting groove is preferably understood as an edge of the opened portion of the mounting groove adjacent to the upper end of the yoke 60. In addition, the separation preventing protrusion may protrude from at least one side of the inner rims facing each other in the mounting groove.

In this case, the separation preventing protrusion is formed to have a thickness corresponding to the thickness of the yoke 60 and may be formed substantially in a continuous contour from the upper end of the yoke 60. In addition, the separation preventing protrusion may be formed to have a height at which the side portion of the suction end portion 53 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 53 may be maintained in a state in which the suction end 53 is arranged inclined toward the upper side toward the rear side by the restoring force of the return spring 55. have. That is, the separation preventing protrusion serves to constrain the suction end 53 to be prevented from being separated from the mounting groove.

Through this, the armature 50 is sucked into the magnetic core 41 due to an external shock or overcurrent, and then the mounting groove part by the departure preventing protrusion in the process of restoring the position by the return spring 55 Since it is prevented from being arbitrarily separated from, assembling property and durability may be further improved.

In addition, the support spring is mounted and provided at the lower end of the yoke 60. Here, the support spring 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. In addition, the holding portion of the yoke 60 is inserted into the hollow of each elastic portion so that the support spring may be mounted on the lower end of the yoke 60.

Meanwhile, the locking mounting portion is provided at the lower end of the yoke 60 so that the support spring is mounted. In detail, fixing cover portions may be provided on both sides of the lower end of the yoke 60, respectively. Here, each of the fixed cover portions may integrally extend from both sides of the lower end portion of the yoke 60 toward the front side. In this case, each of the fixed cover portions may extend so that the lower end is disposed further below the body lower end of the yoke 60. In addition, the locking mounting portion may be provided at a lower end of each of the fixing cover portions. Here, the interval between the facing surfaces of each of the locking mounting portions 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 extends in a direction facing each other from a lower end of each of the fixing cover portions. In this case, the width of the locking mounting portion may be set to be greater than or equal to the width of the elastic portion. Further, when the locking mounting part is inserted into the hollow side of the elastic part, the hollow inner surface of the elastic part may contact the locking mounting part to be stably mounted.

Meanwhile, a pair of spring support grooves may be formed at the lower end of the yoke 60. 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 60. 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 may be inserted into each of the spring support grooves to be latched. Here, the upper end of the support spring 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 may be inserted into the spring support groove to be latched while the locking mounting part is inserted into the hollow of the elastic part. Through this, when the pressing force is applied to the contact portion, the elastic portion is in a state in which 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 may be mounted on the locking mounting portion in the following manner. First, pressure is applied in a direction facing each other so that the spacing between the elastic parts is narrowed. Further, after inserting each of the elastic parts between the opposite surfaces of each of the locking mounting parts, the pressurized state is released. At this time, in the support spring, the elastically deformed bent portion may be restored to its original shape, and the locking mounting portion may be inserted into the hollow of each of the elastic portions. In addition, by inserting the upper end of the support spring into the spring support groove, the mounting of the support spring may be completed.

Accordingly, since the support spring can be easily mounted on the lower end of the yoke 60 by providing a pressing force, the assembling property can be further improved. Moreover, since a separate coupling member for fixing the support spring 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 is not only mounted to the yoke 60 by 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 may be mounted such that one locking mounting part is first inserted into the hollow of one elastic part of each of the elastic parts, and the other locking mounting part is inserted into the hollow by pressing the other elastic part.

On the other hand, the support spring is mounted on the lower end of the yoke 60 and is disposed at the rear side of the inclined support so that the contact portion contacts the lower surface of the inclined support. In this case, the support spring may be elastically deformed by rotating the contact portion relative to 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 resilient force is provided from the support spring. As safety accidents such as fire can be prevented in advance, the safety of the product can be further improved. Moreover, since the support spring is mounted on the lower end of the yoke 60, a separate structure for mounting on the body portion (not shown) is not required, so that the structure of the product is simplified, so that the productivity of the product can be further improved.

In addition, a core mounting portion extending vertically toward the rear is provided at the lower end of the yoke 60. In detail, the core mounting portion may be integrally extended from the body of the yoke 60 to be vertically bent, and a core insertion hole may be formed at an end thereof in a vertical direction. At this time, the inner diameter of the core insertion hole may be set to correspond to the outer diameter of the magnetic core 41, and the lower end of the magnetic core 41 may be fitted through the core insertion hole. 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 in which the lower part is fitted into the core insertion hole. Through this, the magnetic core 41 may be coupled to the core insertion hole to be fixed and disposed in parallel with the yoke 60 to have a predetermined distance apart from each other.

Here, the magnetic core 41 may be reinforced with magnetic force by the yoke 60 and the suction end 53 disposed in parallel. In detail, a magnetic flux is generated when an overcurrent of more than a predetermined reference value flows through the coil 40. In this case, the magnetic flux may be sequentially formed from the lower end of the magnetic core 41 to the core mounting portion, the yoke 60, the suction end 53, 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 53 disposed adjacent to the upper portion of the magnetic core 41 can be sucked by the magnetic force of the magnetic core 41.

Here, the yoke 60 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 so that the magnetic flux dispersion is minimized by the yoke 60 so that the suction end 53 is stably sucked into the suction contact part 41a. The driving reliability of the can be further improved.

On the other hand, the housing portion 10 includes a handle mounting portion 14 on which the trip bar 75, the latch portion 70, the cradle 73, and the assembly portion 180 are installed, the housing portion 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 180 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 183 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 52 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 181 and the second link unit 182 to be described later. ) It is preferable that the hinge is connected between the tops.

In addition, the handle unit 180 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 181 and 182 for pressing the crossbar 30 downward are connected.

Here, the link portions 181 and 182 have an upper end hinged to the lower end of the handle unit 180, and a lower end hinged to the upper end of the second link unit 182 using the locking link 74 as a rotation axis. It is preferable to include the first link unit 181.

At this time, a handle restoring means 180a is provided as a torsion spring or the like at a lower end of the handle unit 180 and an upper end of the first link unit 181 so that the handle unit 180 moves in a rearward direction, which is a current blocking direction. It can provide elastic resilience. Here, the central hollow of the handle restoring means (180a) is inserted into the shaft hingedly connecting the handle part 180 and the handle mounting part 14, but the fixed end is fixed to the handle mounting part 14, and the free end The lower end of the handle unit 180 and the upper end of the first link unit 181 may be connected to each other by a hinge connection.

In addition, the link parts 181 and 182 are hingedly connected to the lower end of the first link part 181, and the pressure rod part 183 inserted into the seating groove of the crossbar 30 is connected to the lower end. It is preferable to include a two-link unit 182.

Here, the pressure rod part 183 may be inserted through the third through hole 14c along the width direction. At this time, the third through hole so that the pressing rod part 183 presses the crossbar 30 so that the movable switching part 20 is selectively moved up and down to be 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 200 further includes a restoring means 184 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 part 183 Do. At this time, the restoration means 184 is preferably provided so that the pressure rod portion 183 is elastically restored upward.

On the other hand, the use state in the normal state in which the overcurrent does not occur of the circuit breaker 200 will be described.

First, in the initial state in which the pressure rod part 183 is disposed on the upper end of the third through hole 14c, the handle part 180 is so that the latch engaging protrusion 72 is engaged with 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 unit 180 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 fixed to the rear end of (14b), the pressure rod portion 183 interlocked therewith is pressed and moved to the lower end of the third through hole 14c. Accordingly, the pressure rod part 183 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 unit 180 is rotated from the front to the rear in a state where 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 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 pressing rod portion 183 interlocked therewith is passed through the third through the elastic recovery force of the restoration means 184. It moves to the top of the ball 14c. Accordingly, the pressure of the crossbar 30 by the pressure rod part 183 is released, and 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 mutually Separated.

On the other hand, the state of use of the circuit breaker 200 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 180 is rotated forward so that the movable contact part 22 and the fixed contact part 13 are mutually contacted. In the connected state, when overcurrent occurs in the coil 40, the suction end 53 is rotated integrally with the suction end 53 as the suction contact part 41a of the magnetic core 41 is rotated. The driving end 52 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 locking 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 pressure rod portion 183 is the elastic recovery force of the recovery means 184 Is moved to the upper end of the third through hole 14c, the pressure of the crossbar 30 by the pressure rod part 183 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 unit 180 is elastically restored to the rear and rotated. Through this, when an overcurrent occurs, the movable contact part 22 and the fixed contact part 13 may be momentarily separated from each other.

Meanwhile, in the temperature sensing bimetal 190, a fixed end 191 is coupled and fixed to the lower end of the handle unit 180, and a free end 192 extends backward from the fixed end 191. In this case, it is preferable to understand that the temperature sensing bimetal 190 has a fixed end 191 and a free end 192 integrally formed with each other.

In addition, when the ambient temperature of the housing unit 10 rises above a preset safety temperature, the temperature sensing bimetal 190 is the fixed state of the cover 1 as the free end 192 is bent upwardly. The upper surface is formed with a lower coefficient of thermal expansion than the lower surface so that the contact plate part 21a is interlockedly rotated by pressing the side of the ceiling part 1a so that the contact plate part 21a is separated from the power input part 11. 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. In addition, the cover 1 is preferably coupled to the upper side of the housing unit 180.

For example, the temperature-sensing bimetal 190 may be provided by having a flat plate made of a copper material disposed on a lower surface 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 upper surface to be bonded to each other. Accordingly, when the ambient temperature of the housing part 10 rises above a preset safe temperature, the free end 192 while the fixed end 191 of the temperature sensing bimetal 190 is fixed to the handle part 180 ) Can be thermally deformed by upward bending.

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, not due to an overcurrent, the contact plate unit 21a is separated from the power input unit 11 as the temperature sensing bimetal 190 is bent and thermally deformed. I can.

That is, the temperature sensing bimetal 190 directly rotates the handle unit 180 when the ambient temperature of the housing unit 10 rises above a preset safety temperature, and the link connected to the handle unit 180 It is a device that blocks the flow of current by the operation of the units 181 and 182 and the crossbar 30. In other words, independent of the function of blocking the current flow when the suction end 53 of the armature 50 generates an overcurrent, the temperature sensing bimetal when the ambient temperature of the housing 10 rises above a preset safety temperature ( 190) can be operated.

On the other hand, it is preferable that the cover 1 has a through hole 2 formed therethrough in the vertical direction on the upper side of the rear end side of the free end 192. In addition, the breaker 200 is inserted through the through hole 2, the upper surface is exposed to the outside of the cover 1, and the lower surface is a high temperature detection button disposed to face the rear end of the free end 192 It is preferable to further include (194).

Here, the high temperature detection button 194 has a button portion 194a whose upper surface is exposed to the outside of the cover 1 and extends downward from the button portion 194a, but is elastic at a predetermined interval along the circumferential direction. It is preferable that a slit is formed so as to be deformed and includes a coupling portion 194b that is inserted into the through hole 2 and clamped. At this time, the diameter of the button part 194a may be set to exceed the diameter of the through hole 2, and the button part 194a may be selectively seated on the upper edge of the through hole 2 . In addition, the high temperature detection button 194 is disposed in a state in which the button portion 194a is seated on the upper edge of the through hole 2, and is popped up when the free end 192 presses upward. I can. At this time, when the high temperature detection button 194 pops up, the user can easily visually confirm that the ambient temperature of the housing 10 is equal to or higher than a preset safety temperature.

In detail, the free end 192 upwards the high temperature detection button 194 as the free end 192 is bent upward with respect to the fixed end 191 when the ambient temperature of the housing part 10 rises above a preset safe temperature. In order to pressurize, when the ambient temperature of the housing unit 10 is less than a preset safe temperature, it is preferably formed in a straight line, and the upper surface of the rear end faces the lower surface of the high temperature detection button 194.

At this time, as the free end 192 is bent upward when the ambient temperature of the housing part 10 rises above a preset safety temperature, the handle part is in a state in which the high temperature detection button 194 is first pressed upward. An extension part 192a that extends backward from the fixed end 91 to an extension length opposite to the lower side of the high temperature detection button 194 so that 180 is rotated secondarily, and from the end of the extension part 192 It is preferable to include a bent contact portion 192b extending to be bent so as to be disposed to face parallel to the lower surface of the high temperature sensing button 194.

On the other hand, it is preferable that a fastening groove 186 is recessed in the vertical direction at the lower end of the handle part 180, and a fastening hole 191a is formed through the fixing end 191 so as to be aligned with the fastening groove 186. Do.

In addition, the circuit breaker 200 further includes a fastening member 193, wherein the fastening member 193 includes a fastening portion 193a that is simultaneously fastened to the fastening groove 186 and the fastening hole 191a, and the It is preferable to include a head portion 193b which is extended radially outward from the end of the fastening portion 193a in the circumferential direction, and is engaged with the lower surface of the fixed end 191.

Accordingly, as the fastening member 193 is fastened in a state in which the fastening groove 186 and the fastening hole 191a are aligned, the fixing end 191 of the temperature sensing bimetal 190 becomes the handle part 180 ) Can be fixed.

On the other hand, referring to FIGS. 2 to 3A, when the ambient temperature of the housing part 10 is less than a preset safety temperature while the handle part 180 is rotated forward, the bent contact part of the free end 192 ( 192b is disposed to face the lower surface of the high temperature sensing button 194, and the fixed contact part 13 and the movable contact part 22 are kept in a contact-connected state.

At the same time, when the ambient temperature of the housing unit 10 is less than a preset safety temperature while the handle unit 180 is rotated forward, the lower end of the handle unit 180 and the first link unit 181 are The link connecting portion 181a between the upper ends is disposed on the rear side of the displacement line k connecting the handle rotation shaft 185 and the other side of the locking link 74. At this time, it is preferable to understand that the other side of the locking link 74 is hinged between the lower end of the first link unit 181 and the upper end of the second link unit 182.

And, referring to FIGS. 3B to 4, when the ambient temperature of the housing part 10 is higher than a preset safety temperature while the handle part 180 is rotated forward, the free end of the temperature sensing bimetal 190 192 is bent upwardly and thermally deformed based on the fixed end 191 by the coefficient of thermal expansion.

Subsequently, as the free end 192 of the temperature sensing bimetal 190 is bent upwardly and thermally deformed, the high temperature sensing button 194 is first pressed upward. Accordingly, the high temperature detection button 194 pops up upward.

And, as the free end 192 is further bent upwardly and thermally deformed in a state in which the high temperature sensing button 194 is popped upward, the free end 192 is subjected to a pressing force that presses the high temperature sensing button 194. By this, the fixed end 191 is rotated interlockingly.

Through this, the fixed end 191 is rotated interlockingly, and the handle part 180 is pulled so that the handle part 180 is rotated rearward by the traction force of the fixed end 191, so that the handle part 180 is rotated backward. The link connection part (181a) between the lower end of the part 180 and the upper end of the first link part 181 is a displacement line (k) connecting the handle rotation shaft 185 and the other side of the locking link 74 It moves forward.

Accordingly, the rotation of the handle part 180 to the rear is accelerated by the elastic resilience force of the elastic means 180a, and the pressure rod part 183 is rotated to the third by the resilience resilience force of the restoring means 184. It is moved to the upper end of the through hole 14c, the pressure of the crossbar 30 by the pressure rod part 183 is released, and the front end of the contact plate part 21a is rotated interlockingly, so that the movable contact part 22 and the The fixed contact portions 13 are separated from each other. At the same time, the handle unit 180 is elastically restored to the rear and rotated. Through this, the movable contact portion 22 and the fixed contact portion 13 may be momentarily separated from each other.

That is, when the ambient temperature of the housing unit 10 is higher than a preset safety temperature, the temperature sensing bimetal 190 presses the high temperature sensing button 194, and the handle unit 180 and the link unit linked thereto The fixed contact part 13 and the movable contact part 22 are separated from each other through the rotational operation of 181 and 182, so that the flow of current is quickly cut off.

At this time, even if the user arbitrarily manipulates and rotates the handle unit 180, the free end 192, which is bent upwardly and deformed with respect to the fixed end 191, presses the high temperature detection button 194 upwardly, and the fixed end Since the traction force of 191 is maintained, the rotational movement of the handle unit 180 toward the front 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 192 of the temperature sensing bimetal 190 in an upwardly bent state is turned to an initial state. Is restored. At this time, the user presses the high temperature detection button 194 popped up upward and rotates the handle part 180 forward to connect the fixed contact part 13 and the movable contact part 22 I can make it.

As such, in the handle button pressurized temperature sensing circuit breaker 200 according to the present invention, a fixed end 191 is coupled and fixed to the lower end of the handle unit 180, and the free end 192 is rearward from the fixed end 191 The temperature sensing bimetal 190 is extended, and the upper surface has a lower coefficient of thermal expansion than the lower surface.

Through this, when the ambient temperature of the housing part 10 rises above a preset safe temperature, the ceiling part 1a in a fixed state as the free end 192 is bent upward with respect to the fixed end 191. The high temperature sensing button 194 disposed on the) side is pressed to rotate the handle unit 180 interlockingly so that the contact plate unit 21a is separated from the power input unit 11 to block current flow.

Therefore, when the ambient temperature of the housing unit 10 rises above a preset safe temperature, the free end 192 is bent upwardly and thermally deformed based on the fixed end 191 of the temperature sensing bimetal 190, so the high temperature sensing button When 194 is pressed, the contact plate part 21a is separated from the power input part 11 as the handle part 180 and the link parts 181 and 182 are rotated interlocked by the traction force of the fixed end 191 In the event of a fire, the current flow can be automatically blocked to prevent secondary safety accidents. Through this, the safety of use of the product can be remarkably improved.

In addition, the upper surface of the rear end of the free end 192 is disposed facing the lower surface of the high temperature detection button 194 inserted through the through hole 2 formed through the cover 1, so that the free end 192 is As the high temperature detection button 194 pops up as it is bent upward, the ambient temperature of the housing 10 can be easily checked with the naked eye, and when the temperature decreases, the high temperature detection button 194 can be pressed down and reused. Safety can be significantly improved.

In addition, as the free end 192 is bent upward when the ambient temperature of the housing part 10 rises above a preset safety temperature, the handle part 194 is first pressed upwardly. An extension part 192a extending backward from the fixed end 191 so that 180 is rotated secondarily, and an extension part 192a that faces parallel to the lower surface of the high temperature detection button 194 from the rear end of the extension part 192a. It includes a bent contact portion (192b) extending to be bent as possible.

Accordingly, when the extended portion 192a of the free end 192 is bent upwardly and thermally deformed by the thermal expansion coefficient, the bent contact portion 192b extended bent at the rear end of the extended portion 192a becomes the high temperature sensing button 194 ) Is first pressed upward, the handle unit 180 is rotated secondarily by the traction force of the fixed end 191, so that the contact plate unit 21a through the link units 181 and 182 becomes the power input unit ( Since it is separated from 11), the operating precision can be remarkably improved.

In addition, when the ambient temperature of the housing unit 10 is higher than a preset safe temperature, the free end 192 is bent upwardly by a thermal expansion coefficient based on the fixed end 191 to press the high temperature detection button 194. And a state in which the fixed end 191 pulls the handle part 180 backward is maintained, so that even if the handle part 180 is arbitrarily operated, the fixed contact part 13 and the movable contact part 22 are separated. It is a safety structure in which the current is cut off by maintaining the safety structure, so the safety of use can be remarkably improved.

In addition, as the fastening member 193 is fastened in a state in which the fastening hole 191a formed through the fixing end 191 is aligned with the recessed fastening groove 186 at the lower end of the handle part 180, the temperature With a simple assembly structure in which the sensing bimetal 190 is fixed to the handle unit 180, assemblyability and productivity can be remarkably improved.

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 a person 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 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 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.

1: cover 10: housing
11: power input unit 12: load output unit
20: movable switching unit 30: crossbar
40: coil 41: magnetic core
50: amateur 60: york
70: latch unit 73: cradle
75: trip bar 80: handle
190: temperature sensing bimetal 194: high temperature sensing button
200: button pressurized 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;
A handle portion coupled to the handle mounting portion provided in the housing portion so as to be rotated forward and backward, and to which a link portion for pressing the crossbar downward in a rotation direction is connected; And
A fixed end is coupled and fixed to the lower end of the handle part, and the free end extends backward from the fixed end, and when the ambient temperature of the housing part rises above a preset safe temperature, the free end is in a fixed state as the free end is bent and deformed upward. When pressing the ceiling side of the cover coupled to the upper side of the housing part, the handle part is rotated interlockedly by the traction force of the fixed end, so that the contact plate part is separated from the power input part, so that the upper surface is formed with a lower thermal expansion coefficient than the lower surface. Include,
Through holes are formed through the cover in the vertical direction,
Further comprising a high temperature detection button inserted through the through hole, the upper surface is exposed to the outside of the cover and the lower surface is disposed to face the rear end upper surface of the free end,
In the case where the ambient temperature of the housing part is less than a preset safe temperature, the free end presses the high temperature detection button upwards as the surrounding temperature of the housing part rises above a preset safe temperature, as it is bent upwardly and deformed with respect to the fixed end. A button pressurized temperature sensing circuit breaker formed in a straight line, wherein the upper surface of the rear end faces the lower surface of the high temperature sensing button. delete The method of claim 1,
The free end extends backward from the fixed end so that the handle part is rotated secondarily in a state in which the high temperature detection button is first pressed upward when the ambient temperature of the housing part rises above a preset safety temperature, as it is bent upward. With an extension that becomes
A button pressurized temperature sensing circuit breaker comprising a bent contact portion extending to be bent so as to be disposed to face parallel to a lower surface of the high temperature sensing button from an end of the extended portion. The method of claim 1,
A fastening groove is formed in the lower end of the handle part in the vertical direction, and a fastening hole is formed through the fixing end so as to be aligned with the fastening groove,
The fastening member further comprises a fastening member that is simultaneously fastened to the fastening groove and the fastening hole, and a fastening member that extends radially outward from the end of the fastening part in a circumferential direction and is engaged with a lower surface of the fastening end. Button pressure type temperature sensing circuit breaker characterized by. The method of claim 1,
When an overcurrent occurs in the overcurrent sensing means electrically connected between the rear portion of the contact plate portion and the load output portion, a suction end that is sucked and rotated toward the overcurrent sensing means and a driving end that is integrally bent downwardly extending from the front end side of the suction end An armature including a, a trip bar disposed opposite to the front of the lower end of the driving end, and disposed to move back and forth to a handle mounting portion provided in the housing portion, and a latch connected to the trip bar at the lower end, and a central portion connected to the handle mounting portion. Further comprising a latch portion provided to rotate back and forth with respect to the rotation axis, and a cradle having an upper end selectively engaged with the upper portion of the latch portion, and having a lower end rotated back and forth with respect to the cradle rotation axis connected to the handle mounting portion,
A latch engaging protrusion protruding downwardly bent from the protruding end of the latch part is formed on the upper part of the latch part, and a second through hole extending in the front-rear direction is formed in the handle mounting part through the width direction so that the cradle is rotated back and forth, At the top of the cradle, a guide protrusion protrudes rearward so that the end of the latch engaging protrusion is in contact and guided while the cradle is disposed in front of the second through hole, and the latch engaging protrusion protrudes from the cradle to the second through hole. A button pressurized temperature sensing circuit breaker, characterized in that it is disposed at the front of the top of the cradle in a state disposed at the rear of the cradle.

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