KR102142353B1 - contact-bar rotating type temperature detecting circuit breaker - Google Patents

Abstract

The present invention relates to a contact plate rotation-type temperature sensing circuit breaker. According to the present invention, the contact plate rotation-type temperature sensing circuit breaker comprises: a housing unit; a movable switching unit; a crossbar; a coil arranged to surround the outer circumference of a magnetic core; an armature including a suction end and a driving end; a trip bar; a latch unit having the lower end connected to the trip bar; a cradle; a handle unit; and a temperature sensing bimetal unit. According to the present invention, assemblability and productivity can be remarkably improved.

Description

Contact-bar rotating type temperature detecting circuit breaker

The present invention relates to a rotary temperature sensing circuit breaker of a contact plate portion, and more particularly, to a rotary temperature sensor circuit breaker of a contact plate portion having improved safety while heating is simplified.

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

Here, in the related art, a bimetal circuit breaker has been disclosed that uses two metal plates having different thermal expansion coefficients and bends to a small side when the heat due to overcurrent is applied. In a bimetal circuit breaker, when a current is supplied to a circuit, a resistance is generated to heat the bimetal, and when an excess current of a certain level or more flows, the bimetal bends to drive a trip bar that is in close contact. In addition, the contact terminal coupled to the lower portion of the bimetal is driven from the input terminal to a structure in which the flow of current is blocked.

However, the conventional bimetal circuit breaker has a problem in that the circuit breaker does not block current flow even if high heat is generated in 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 to block current flow, there is a serious problem that may cause a secondary safety accident in case of an internal fault or an external fire.

Korean Utility Model No. 20-0341427

In order to solve the above problems, the present invention is to solve the problem of providing a rotary temperature sensing circuit breaker of a contact plate portion with improved safety during heat generation while the configuration is simplified.

In order to solve the above problems, the present invention, the power input unit and the load output unit is provided with a housing spaced apart at the front and rear sides; A movable switching unit provided with a contact plate portion selectively connected 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 portion to selectively press the contact plate portion; A coil which is electrically connected between the rear portion of the contact plate portion and the load output portion and is disposed surrounding an outer periphery of a magnetic core that selectively forms a suction force; When the overcurrent occurs in the coil, the armature includes a suction end that is suction-rotated on the upper portion of the magnetic core and a driving end that is integrally downwardly bent from the front end side of the suction end and rotates integrally to perform a trip operation; A trip bar disposed opposite to the lower front of the driving end portion and disposed to move back and forth in a handle mounting portion provided in the housing portion; The latch bar is connected to the lower end, the central portion is provided with a latch portion that is rotated back and forth relative to the latch rotation axis connected to the handle mounting portion; A cradle having an upper end selectively engaged with the upper portion of the latch, and having a lower end rotated back and forth relative to a cradle rotation axis connected to the handle mounting portion; A handle part coupled to the handle mounting part provided in the housing part to be rotated back and forth, and linked to the cradle at the bottom, but a link part connected to a downwardly pressing the crossbar according to a rotation direction; And a fixed end coupled to and fixed to an upper portion of the crossbar, and a free end bent downwardly downward to be at an acute angle from the rear end of the fixed end is disposed opposite to the upper portion of the contact plate portion, and the ambient temperature of the housing portion is preset. When the free end is bent and deformed backwards based on the fixed end when it rises above the safety temperature, when the rear end portion of the contact plate portion is pressed downward, the contact plate portion is rotated so that the rear side has a lower thermal expansion coefficient than the front side so as to be separated from the power input portion. Provided is a rotary temperature sensing circuit breaker in a contact plate portion including a formed temperature sensing bimetal.

Through the above-described solution, the contact plate rotation temperature sensing circuit breaker according to the present invention provides the following effects.

First, when the ambient temperature of the housing part rises above a predetermined safety temperature, the free end of the temperature sensing bimetal fixed to the crossbar is deflected and thermally deformed backwards. Since the front end is separated from the power input by being rotated around the protrusion, it is possible to prevent the second safety accident by automatically blocking the current flow in the event of a fire.

Second, if the ambient temperature is above a predetermined safety temperature, the inclined support portion bent upward from the rear end of the contact plate portion remains pressed and rotated by the free end of the temperature-sensing bimetal, so that even if the handle portion is manipulated, the fixed contact portion and the movable contact point The safety structure in which the current is cut off by maintaining the negative separation state can significantly improve the safety of use.

Third, a simple assembly structure that aligns the first fixing hole formed through the fixed end of the temperature sensing bimetal with the second fixing hole formed through the upper part of the crossbar and fastens the fixed end of the temperature sensing bimetal to the upper part of the crossbar through a fastening member. Assembleability and productivity can be significantly improved.

1 is a perspective view showing a state in which the cover of the rotary temperature sensing circuit breaker of the contact plate according to an embodiment of the present invention is separated and the inside is exposed.
Figure 2 is a perspective view showing a state of use of the contact plate rotation temperature sensing circuit breaker according to an embodiment of the present invention.
3a and 3b is a side view showing a state of use of the contact plate portion rotary temperature sensing circuit breaker according to an embodiment of the present invention.
Figure 4 is a perspective view showing a cross bar in the contact plate portion rotary temperature sensing circuit breaker according to an embodiment of the present invention.
Figure 5 is an exemplary view showing the assembly process of the temperature sensing bimetal in the contact plate portion rotary temperature sensing circuit breaker according to an embodiment of the present invention.
6 and 7 is an exemplary view showing a state of use of the temperature sensing bimetal in the contact plate rotation temperature sensing circuit breaker according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a rotary temperature sensing circuit breaker of the contact plate according to a preferred embodiment of the present invention.

1 is a perspective view showing a state in which the cover of the contact plate part rotary temperature sensing circuit breaker according to an embodiment of the present invention is separated, and FIG. 2 is a contact panel part rotary temperature sensor according to an embodiment of the present invention 3A and 3B are side views showing a use state of a contact-type rotary temperature sensing circuit breaker according to an embodiment of the present invention, and FIG. 4 is a contact view according to an embodiment of the present invention Figure 5 is a perspective view showing a crossbar in the rotating temperature sensing circuit breaker, Figure 5 is an exemplary view showing the assembly process of the temperature sensing bimetal in the contact plate rotating temperature sensing circuit breaker according to an embodiment of the present invention, Figures 6 and 7 It is an exemplary view showing a state of use of a temperature sensing bimetal in a contact-type rotating temperature sensing circuit breaker according to an embodiment of the present invention. At this time, FIGS. 1 to 7 is preferably understood as an example showing a state in which some components, such as a cover, a housing portion, or a handle mounting portion, are partially excluded to illustrate the configuration of the contact plate portion rotary temperature sensing breaker. In addition, it is preferable to understand the contact plate part rotary temperature sensing circuit breaker and circuit breaker to be described below in the same sense.

1 to 7, the contact plate according to an embodiment of the present invention, the rotary temperature sensing circuit breaker 100 includes a housing part 10, a movable switching part 20, a cross bar 30, a coil 40 ), armature 50, yoke 60, trip bar 75, latch portion 70, cradle 73, handle portion 80 and temperature sensing bimetal 90.

In detail, the housing part 10 includes an internal space in which components of the circuit breaker 100 are accommodated, and is preferably formed of an insulating and non-combustible synthetic resin material. In the interior of the housing part 10, partition partition walls, installation grooves or holes are formed to install and assemble each component. Here, the front side of the housing portion 10 is provided with a power input unit 11 connected to the power supply side, a rear side is provided with a load output unit 12 connected to the load side, and the power input unit 11 has a fixed contact unit ( 13) is provided. At this time, in one embodiment of the present invention, it is preferable to understand that 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 arranged for selective power connection between the power input unit 11 and the load output unit 12. Here, the movable switching portion 20 is provided with a contact plate portion 21a to which the front end portion is selectively contact-connected to the power input portion 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 portion 20 includes a movable contact portion 22 that is in contact with the fixed contact portion 13 below the front end of the contact plate portion 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. At this time, the contact plate portion 21a is preferably formed of a conductive metal material that provides elastic recovery force so that the movable contact portion 22 is in contact with the stationary contact portion 13 so as to be electrically connected and selectively spaced apart.

In addition, the contact plate portion 21a is integrally formed with an inclined support portion 21b that is bent upwardly to have an obtuse angle θ1 from the rear end. At this time, a support spring 69, which will be described later, is in contact with the lower surface of the inclined support portion 21b so that the contact plate portion 21a can be 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 side of the front end of the contact plate portion 21a, and the trip driving groove 31 into which the contact plate portion 21a is inserted is formed.

Further, the crossbar 30 is preferably connected to the contact plate portion 21a to selectively press the front end portion of the contact plate portion 21a. Here, the contact center portion 21a may protrude from the center of rotation 21c, which provides a reference axis of rotation from the central side. And, the crossbar 30 is preferably coupled to the rotation center projection (21c) to selectively press the front end portion of the contact plate portion (21a).

In addition, a seating groove 33 may be recessed at an upper portion of the crossbar 30 so that a pressure bar portion 83 that is linked to a lower portion of the handle portion 80 is seated and fixed. The crossbar 30 is pressurized downward by the pressing force applied from the upper side through the handle portion 80, but is integrally upward with the handle portion 80 through the elastic means 80a of the handle portion 80. It is supported. The link structure of the handle portion 80 will be described later.

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

On the other hand, 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 to surround the outer circumference of the magnetic core 41 which selectively forms a suction magnetic force. .

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

In addition, the magnetic core 41 is formed of a metal material such as iron having conductivity, and may be provided in a cylindrical shape. At this time, the magnetic core 41 is disposed in the vertical direction of the housing portion 10 between the power input unit 11 and the load output unit 12 may be fixed to be mounted on the yoke (60).

Here, the coil 40 is wound on the outer surface of the magnetic core 41. At this time, a magnetic force may be formed on the magnetic core 41 by the coil 40 wound on the outer surface, and the armature 50 may be formed by the magnetic force of the magnetic core 41. It may be sucked to contact the suction contact portion (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 described later forward.

On the other hand, the armature 50 is disposed between the power input unit 11 and the load output unit 12, and is disposed on 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 portion 52 and the suction end portion 53. In detail, the base portion 51 is disposed in the vertical direction of the housing portion 10 and is provided so that the drive end portion 52 and the suction end portion 53 are integrally connected. In addition, the driving end 52 extends downward on one side in the width direction of the lower end of the base 51, and the spring alignment unit 54 extends downward on the other side in the width direction of the lower end.

At this time, the drive end portion 52 and the spring alignment portion 54 are spaced apart from each other in a widthwise direction, and an alignment groove 51a is formed between the drive end portion 52 and the spring alignment portion 54. Here, the return spring 55 is disposed on the alignment groove 51a side, and the return spring 55 is disposed on the front side of the yoke 60, but both ends are connected to the armature 50 and the yoke 60 By providing the elastic restoring force, the position can be restored after the armature 50 is sucked and rotated by the magnetic core 41. At this time, the return spring 55 has both ends provided in a hook shape so that the upper end is hooked to the upper catching hole 51b formed in the base part 51 and the lower end has a lower catching hole 63 formed in the yoke 60. ). Through this, the return spring 55 can be easily mounted so that the armature 50 and the yoke 60 are connected without a process such as a separate adhesion.

Here, it is preferable that the elastic restoring force of the return spring 55 is set smaller than the magnetic force formed on the magnetic core 41. Through this, when the magnetic force of the magnetic core 41 acts, the suction end portion 53 may be sucked in contact with the suction contact portion 41a.

On the other hand, the driving end portion 52 extends from one end in the width direction of the lower end portion of the base portion 51 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 is rotated so that the latch 70 is rotated to perform the trip operation. Can be pressed in contact with.

On the other hand, the suction end portion 53 is bent from the upper end portion of the base portion 51 and extends upward obliquely toward the rear side. At this time, the suction end portion 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 portion 53 is inserted into the mounting groove 61 of the yoke 60, 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 yoke mounting grooves 53a may be recessed inwards 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 arranged such that the suction end 53 is rotatably supported by the mounting groove 61 formed at the upper end of the yoke 60. Through this, the armature 50 can be driven to seesaw using a portion supported by the rim of the mounting groove 61 as a rotational support point.

That is, the suction end portion 53 is rotated as a rotational support point of the portion supported by the rim of the mounting groove 61 by magnetic force formed from the coil 40 when an overcurrent occurs and can be sucked to the suction contact portion 41a. . At this time, and, the driving end 52 may push the trip bar 75 forward as it is integrally rotated with the suction end 53 corresponding to the rotation angle of the suction end 53. The latch portion 70 is rotated to perform a trip operation.

Meanwhile, the yoke 60 may be provided in a plate shape having a predetermined thickness and is preferably formed of a conductive metal material. Further, the yoke 60 may be spaced apart in front of the magnetic core 41 to extend parallel to the magnetic core 41. At this time, the yoke 60 is disposed between the armature 50 and the magnetic core 41 and may be coupled to be fixed to the housing part 10. Here, the mounting groove portion 61 is formed at an upper end portion of the yoke 60. In detail, the mounting groove 61 may be recessed downward from the upper end of the yoke 60 to a predetermined width, and formed at the center of the upper end of the yoke 60 so that the yoke 60 viewed from the front is in a'Y' shape It can be formed as.

At this time, the width of the mounting groove portion 61 may be set to correspond to the width of the portion where the yoke mounting groove 53a of the suction end portion 53 is formed. Through this, when the suction end portion 53 is inserted into the inside of the mounting groove portion 61, the rim portion of the suction end portion 53 may slide into the inside of the yoke mounting groove 53a and be inserted. In addition, the suction end portion 53 may be formed with a width that the yoke mounting groove (53a) exceeds the thickness of the yoke (60). Accordingly, the armature 50 may be spaced to rotate by using a portion supported by the rim of the mounting groove portion 61 as a rotation axis even though being sucked by the magnetic force of the magnetic core 41. That is, the armature 50 can be rotatably supported on the upper end of the yoke 60 so that the suction end 53 is sucked into the suction contact portion 41a accurately by the magnetic force of the magnetic core 41. .

On the other hand, the yoke 60 is provided with a detachment preventing protrusion 62 protruding toward the inside of the mounting groove 61 from the inner edge of the inlet side of the mounting groove 61. Here, it is preferable to understand that the inner side edge of the mounting groove 61 is an edge of the opened portion of the mounting groove 61 adjacent to the upper end of the yoke 60. In addition, the departure-preventing projections 62 may protrude from at least one side of the mutually opposite inner rim of the mounting groove 61.

At this time, the departure preventing protrusion 62 is formed to have a thickness corresponding to the thickness of the yoke 60 and may be substantially formed as a continuous contour from the upper end of the yoke 60. In addition, the departure preventing protrusion 62 may be formed to have a height at which a side portion of the suction end portion 53 is locked at a lower end portion in a normal state. Here, the normal state is preferably understood as a state in which no overcurrent occurs, and the suction end portion 53 can be maintained in a state inclined toward the upper side toward the rear side by the restoring force of the return spring 55. have. That is, the departure preventing protrusion 62 serves to constrain the suction end 53 to be prevented from being detached from the mounting groove 61.

Through this, the armature 50 is sucked by the magnetic core 41 due to external shock or overcurrent, and then, by the return preventing protrusion 55, the departure preventing protrusion 62 is used to restore the position. Since it is prevented from being separated from the mounting groove portion 61, assembly and durability can be further improved.

And, the lower end of the yoke 60 is provided with the support spring 69 is mounted. Here, the support spring 69 is provided including a contact portion and an elastic portion. In detail, the contact portion is provided to have a width equal to or greater than the width of the inclined support portion 21b in order to stably support the lower surface portion of the inclined support portion 21b, and is disposed along the width direction, but is caught in the lower surface portion of the inclined support portion 21b. Can be connected. Through this, the contact portion can be maintained in a stable contact with the inclined support portion (21b).

In addition, each of the elastic portions is provided at both ends of the contact portion, and each elastic portion is connected to the lower end by bending and extending from both ends of the contact portion. At this time, the elastic portion is formed with a hollow in the center, the central axis may be wound in a spiral to correspond to the width direction of the contact portion, when the pressing force is applied to the contact portion can provide a resilient force. Then, the engaging portion 65 of the yoke 60 is inserted into the hollow of each elastic portion so that the support spring 69 can be mounted to the lower end of the yoke 60.

On the other hand, the lower portion of the yoke 60 is provided with the engaging portion 65 so that the support spring 69 is mounted. In detail, fixed cover portions 64 may be provided on both sides of the lower end of the yoke 60. Here, each fixing cover portion 64 may extend integrally from both sides of the lower end portion of the yoke 60 toward the front side. At this time, each of the fixed cover portion 64 may be extended so that the lower end is disposed further below the lower end of the body of the yoke 60. In addition, the engaging portion 65 may be provided at a lower end of each of the fixing cover portions 64. Here, the spacing between the opposing surfaces of each of the engaging portions 65 may be set to be less than the spacing between the outer portions of each of the elastic portions. Here, each of the engaging portion 65 is extended in a direction facing each other from the lower end of each of the fixed cover portion (64). At this time, the width of the engaging portion 65 may be set to be more than the width of the elastic portion. In addition, when the engaging portion 65 is inserted into the hollow side of the elastic portion, the hollow inner surface of the elastic portion may be in contact with the engaging portion 65 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 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 elastic portion.

At this time, the upper end of the support spring 69 may be inserted into each of the spring support grooves to be caught and supported. Here, the upper end of the support spring 69 is preferably understood as an end portion extending from the elastic portion in the opposite direction of the contact portion. Further, the upper end of the support spring 69 may be inserted into the spring support groove in the state in which the locking mounting portion 65 is inserted into the hollow of the elastic portion to be caught and supported. Through this, when the pressing force is provided to the contact portion, the upper end side is constrained by the spring support groove, so the elastic restoring force can be provided to the contact portion.

Here, the support spring 69 may be mounted on the engaging portion 65 in the following way. First, it presses in the direction facing each other so that the separation between the elastic parts is narrowed. In addition, after inserting each of the elastic parts between the opposing surfaces of each of the engaging parts 65, the pressure is released. At this time, in the support spring 69, the elastically deformed bent portion may be restored to its original shape, and the engaging portion 65 may be inserted into the hollow of each elastic portion. Then, the mounting of the support spring 69 can be completed by inserting the upper end of the support spring 69 into the spring support groove.

Accordingly, the support spring 69 can be easily mounted to the lower end of the yoke 60 simply by providing a pressing force, thereby improving assembly performance. Moreover, since a separate coupling member for fixing the support spring 69 is not required and additional processes for bonding such as adhesion are omitted, productivity and economics of the product can be significantly improved. Moreover, the support spring 69 is not only mounted on the yoke 60 with only the elastic restoring force, but also provided with a structure for supporting the contact plate portion 21a with a carbonized structure, so that the structure is simplified and the productivity of the product can be further improved. Of course, the support spring 69 may also be mounted such that the first attachment portion is inserted into the hollow portion of the elastic portion of each of the elastic portions, and the other elastic attachment portion is inserted into the hollow by pressing the other elastic portion.

On the other hand, the support spring 69 is disposed on the rear side of the inclined support portion 21b so that the contact portion is in contact with the lower surface portion of the inclined support portion 21b while being mounted on the lower end portion of the yoke 60. At this time, the support spring 69 may be elastically deformed by pressing and rotating the contact portion based on the central axis of the elastic portion by the inclined support portion 21b.

Here, as the elastic restoring force of the elastic portion is transmitted to the inclined support portion 21b through the contact portion, the contact plate portion 21a may act as a rotational force based on the rotation center projection 21c. At this time, the contact plate portion 21a may be more stably maintained in a state in which the movable contact portion 22 is in contact with the fixed contact portion 13 in a normal state by rotational force. Accordingly, since the contact plate portion 21a maintains a stable contact state between the movable contact portion 22 and the fixed contact portion 13 as continuous elastic recovery force is provided from the support spring 69, contact with each other Safety accidents such as fire due to defects can be prevented beforehand, and the safety of the product can be further improved. Moreover, since the support spring 69 is mounted on the lower end of the yoke 60, a separate structure for mounting on the body 10 is not required, so that the product structure is simplified, so that the productivity of the product can be further improved. have.

And, the lower end of the yoke 60 is provided with a core mounting portion 66 extending vertically toward the rear side. In detail, the core mounting portion 66 may be integrally extended vertically from the body of the yoke 60, and a core insertion hole penetrated vertically at an end thereof may be formed. 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, the lower end of the magnetic core 41 may be fitted through the core insertion hole. That is, in the magnetic core 41, the coil 40 may be wound on the outer surface of the upper portion from the lower end in a state where the lower end is fitted into the core insertion hole. Through this, the magnetic core 41 may be arranged parallel to each other in a spaced apart state to have a predetermined distance from the yoke 60 in a fixed state coupled to the core insertion hole.

Here, the magnetic core 41 may be reinforced magnetic force by the yoke 60 and the suction end 53 disposed in parallel. In detail, magnetic flux is generated when an overcurrent of a predetermined reference value or more 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 66, 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 act in the vertical direction by Fleming's left-hand rule, and a suction force for pulling the magnetic body to the suction contact portion 41a may be generated. Through this, the suction end portion 53 disposed to be 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 60 serves as a magnetic flux moving 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 dispersion of the magnetic flux is minimized by the yoke 60 in the magnetic core 41 so that sufficient magnetic force can be formed so that the suction end 53 is stably sucked into the suction contact portion 41a. The driving reliability of the can be further improved.

On the other hand, referring to Figures 1 to 3b, the housing portion 10, the trip bar 75, the latch portion 70, the cradle 73 and the assembly 80, the handle mounting portion is installed ( 14) may be mounted on either one side of the housing portion 10 and the other side. At this time, in the embodiment of the present invention, a case where the handle mounting portion 14 is disposed on the other side in the width direction of the housing portion 10 is illustrated and described as an example.

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

On the other hand, the trip bar 75 is provided in a cylindrical shape of an insulating material with a length corresponding to the width of the housing portion 10 may be disposed along the width direction of the housing portion 10. Here, the trip bar 75, the outer portion is disposed opposite to the lower front of the drive end portion 52, it is preferable that the front and rear movement of the first through hole (14a) of the handle mounting portion (14). At this time, the first through hole (14a) is formed on the lower side of the side wall surface of the handle mounting portion 14 may be extended in the longitudinal direction. In addition, the trip bar 75 has a widthwise outer end disposed in the widthwise outer side of the first through hole 14a, and a widthwise inner end is disposed inside the handle mounting portion 14.

And, the latch portion 70 is disposed in the vertical direction on the inside of the handle mounting portion 14, the trip bar 75 is connected to the bottom, the central portion of the first alignment hole of the handle mounting portion 14 ( It is provided to be rotated back and forth with respect to the latch rotation shaft 71 hinged to 14d). At this time, it is preferable that the first alignment hole 14d is disposed above the first through hole 14a. Here, it is preferable that the latch restoration part 70a is provided on the latch rotation shaft 71 so as to provide the elastic restoration force when the latch part 70 rotates.

In addition, it is preferable that the latch catching protrusion 72 protruding downwardly from the protruding end extending forward is formed on the upper portion of the latch part 70. At this time, the latch engaging projection 72 is preferably caught in 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 cradle 73 is selectively engaged by the latch catching projection 72 formed on the upper portion of the upper latch portion 70, the lower end of the second alignment hole 14e of the handle mounting portion 14 It is preferably provided to be rotated back and forth based on the cradle rotating shaft (73b) connected to the hinge. At this time, it is preferable that the second alignment hole 14e is disposed under the second through hole 14b. In addition, it is preferable that the guide projection 73a is protruded backward so that the end of the latch engaging projection is selectively contacted and guided to the upper portion of the cradle 73.

In addition, one side of the locking link 74 is hinged to the central portion in the vertical direction of the cradle 73, but one side of the locking link 74 is from the outer side in the width direction of the second through hole 14b. It is preferably inserted into the hinge connection.

Here, the locking link 74 may be provided to be bent in a'U' shape, the other side of the locking link 74 is the lower end of the first link portion 81 to be described later and the second link portion 82 ) Is preferably hinged between the tops.

In addition, the handle portion 80 is hinged to the handle mounting portion 14 and coupled to be rotated back and forth, and is linked to the bottom through the cradle 73 and the engaging link 74, but in accordance with the rotation direction. 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 are hinged to the upper end of the handle portion 80, and the lower end is hinged to the upper end of the second link portion 82 using the locking link 74 as a rotation axis. It is preferable to include the first link portion 81 to be connected.

At this time, the lower end of the handle portion 80 and the upper end of the first link portion 81 are provided with a handle restoring means 80a, such as a torsion spring, so that the handle portion 80 is in a rearward direction that is a current blocking direction. It can provide elastic resilience. Here, the central portion of the handle restoring means (80a) is inserted into the shaft hinge connecting the handle portion 80 and the handle mounting portion 14, the fixed end is fixed to the handle mounting portion 14 and the free end is the The lower end of the handle portion 80 and the upper end of the first link portion 81 may be hungly connected to an axis connecting the hinge.

And, the link portion 81, 82 is the upper end is hinged to the lower end of the first link portion 81, the pressure bar portion 83 is inserted into the seating groove portion 33 of the crossbar 30 to the lower end It is preferable to include the second link portion 82 is connected.

Here, the pressing 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 pressing rod portion 83 presses the crossbar 30 to selectively move up and down to selectively connect and disconnect the movable switching portion 20 from the power input portion 11 (14c) is preferably extended in the vertical direction below the side wall surface of the handle mounting portion (14).

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

In addition, the breaker 100 preferably further includes a restoring means 84 provided as a coil spring or the like so that the upper end is connected to the spring fixing protrusion 14f and the lower end is engaged to the pressurizing rod portion 83. Do. At this time, the restoring means 84 is preferably provided so that the pressing rod 83 is restored to the upper side.

Meanwhile, a use state in a normal state in which no overcurrent of the breaker 100 is generated will be described.

First, in the initial state in which the pressing rod portion 83 is disposed on the upper end of the third through hole 14c, the handle portion 80 so that the latch engaging projection 72 is engaged on the front side of the cradle 73. ) Is rotated backward. Accordingly, as the engaging link 74 is interlocked and moved to the rear end of the second through hole 14b, the latch engaging projection 72 is engaged at the front end of the cradle 73. At this time, it is preferable to understand that the trip operation is not performed even when the trip bar 75 is moved in the state in which the latch catching protrusion 72 is not caught in the upper front side of the cradle 73.

In addition, when the latch engaging protrusion 72 is locked at the upper front side of the cradle 73, when the handle portion 80 is rotated forward, the rear portion of the locking link 74 is the second through hole. In the state fixed to the rear end of (14b), as the front portion of the locking link 74 rotates downward, the pressing rod portion 83 linked thereto is moved to the lower end of the third through hole 14c. Accordingly, the pressing rod portion 83 presses the crossbar 30 downward, so that the front end of the contact plate portion 21a is interlocked and rotates, so that the movable contact portion 22 and the fixed contact portion 13 are connected to each other. do.

In addition, in the state in which the latch engaging projection 72 is engaged at the front end of the cradle 73, when the handle portion 80 is rotated from front to rear, the rear portion of the engaging link 74 is the second In the state fixed to the rear end of the through hole 14b, as the front portion of the locking link 74 rotates upward, the pressing rod portion 83 interlocked therewith is moved through the third through the elastic restoring force of the restoring means 84. It is moved to the top of the ball 14c. Accordingly, the crossbar 30 is released by the pressure bar portion 83, and the front end of the contact plate portion 21a is rotated interlocked so that the movable contact portion 22 and the fixed contact portion 13 mutually Is separated.

On the other hand, the state of use when the overcurrent of the circuit breaker 100 is generated will be described.

In detail, the latch engaging projection 72 is caught on the front side of the cradle 73 and the handle portion 80 is rotated forward so that the movable contact portion 22 and the fixed contact portion 13 are mutually contacted. In the connected state, when an overcurrent occurs in the coil 40, the suction end 53 is rotated with suction to the suction contact portion 41a of the magnetic core 41, and the rotation is integrally rotated with the suction end 53 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 catching protrusion 72 are rotated to the rear side around the latch rotation shaft 71. Here, when the latch engaging protrusion 72 is rotated and deviates from the upper front side of the cradle 73, the rear portion of the engaging link 74 is instantaneously shot from the rear end of the second through hole 14b to the front end. It is moved by resilience. At this time, the upper end of the latch restoring portion (70a) is caught on the upper rear side of the latch portion 70, but the lower end is engaged with the rear portion of the locking link (74) to provide elastic recovery force. 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 restoring portion 70a may be disposed in a state in which the cradle rotation shaft 73b is locked.

Accordingly, when the rear portion of the locking link 74 is instantaneously moved from the rear end of the second through hole 14b to the front end by the elastic recovery force, the pressing rod 83 is elastic recovery force of the restoration means 84 By this, it is moved to the top of the third through hole 14c, the pressure of the crossbar 30 is released by the pressing rod 83, and the front end of the contact plate portion 21a is rotated interlocked to move the contact point. 22 and the fixed contact portion 13 are separated from each other. At the same time, the handle portion 80 is elastically restored to the rear side and rotated. Through this, when the overcurrent occurs, the movable contact portion 22 and the fixed contact portion 13 can be instantaneously separated from each other.

On the other hand, the temperature-sensing bimetal 90 is fixed to the fixed end 91 is coupled to the upper portion of the crossbar 30, is bent downwardly extending downward to have an acute angle (θ2) from the rear end of the fixed end 91 The free end 92 is disposed opposite to the upper portion of the contact plate portion 21a. At this time, the temperature-sensing bimetal 90 is preferably understood as the fixed end 91 and the free end 92 are formed integrally with each other.

And, the temperature detection bimetal 90 is the free end 92 is bent and deformed in accordance with the fixed end 91 when the ambient temperature of the housing portion 10 rises above a predetermined safety temperature or higher. The rear side of the contact plate portion 21a is pushed downwardly so as to have an obtuse angle θ1 at the rear end portion of the contact plate portion 21a, so that the contact plate portion 21a is rotated to be spaced apart from the power input portion 11 It is formed with a lower coefficient of thermal expansion than the front. At this time, the ambient temperature of the housing part 10 is preferably understood as a concept encompassing the air temperature inside the housing part 10 and the temperature of each component disposed inside the housing part 10.

For example, the temperature-sensing bimetal 90 may be provided by placing a flat plate made of copper on the front side and a flat plate made of iron having a lower coefficient of thermal expansion than that of the copper material, and bonding to each other. Accordingly, when the ambient temperature of the housing portion 10 rises above a predetermined safety temperature, the fixed end 91 of the temperature sensing bimetal 90 is fixed to the crossbar 30, and the free end 92 This backward bending can be thermally deformed.

At this time, the predetermined safety temperature may be set to 70 ~ 100 ℃, most preferably 80 ℃. That is, when the ambient temperature of the housing portion 10 rises rather than the temperature rise due to the overcurrent, the contact plate portion 21a is separated from the power input portion 11 as the temperature sensing bimetal 90 deforms thermally by bending. Can.

That is, the temperature sensing bimetal 90 operates independently of the armature 50 that blocks current flow when an overcurrent occurs, and blocks current flow when the ambient temperature of the housing portion 10 rises above a predetermined safety temperature. Device.

Meanwhile, referring to FIG. 5, a first fixing hole 91a is formed in the vertical direction through the fixing end 91, and the first fixing hole 91a is arranged at an upper portion of the crossbar 30. 2 It is preferable that the fixing hole 32 is formed through the vertical direction.

In addition, the breaker 100 preferably further includes a fastening member 93 fastened to the first fixing hole 91a and the second fixing hole 32. Accordingly, the fixed end 91 of the temperature-sensing bimetal 90 can be fastened and fixed to the upper part of the crossbar 30 through the fastening member 93.

On the other hand, when the ambient temperature of the housing portion 10 rises above a predetermined safety temperature, the free end 92 is deflected backwards relative to the fixed end 91 to press the inclined support portion 21b, The rear end of the fixed end 91 is disposed opposite to the upper side of the inclined support portion 21b, and the free end 92 is the inclined support portion 21b when the ambient temperature of the housing portion 10 is less than a predetermined safety temperature It is preferred to be spaced parallel to the top of the.

At this time, if the free end 92 is the ambient temperature of the housing portion 10 is less than the preset safety temperature, the ambient temperature of the housing portion 10 is set to be spaced apart parallel to the inclined support portion 21b. The sum of the acute angle θ2 and the obtuse angle θ3 when the temperature is lower may be set to substantially 180°.

On the other hand, referring to Figure 6, the latch engaging projection 72 is caught in the upper front side of the cradle 73 and the ambient temperature of the housing portion 10 while the handle portion 80 is rotated forward When it is less than a predetermined safety temperature, the free end 92 of the temperature sensing bimetal 90 is spaced apart from the inclined support portion 21b, and the fixed contact portion 13 and the movable contact portion 22 are connected in contact. State is maintained.

And, referring to Figure 7, the latch engaging projection 72 is caught on the upper front side of the cradle 73 and the ambient temperature of the housing portion 10 while the handle portion 80 is rotated forward When it is equal to or greater than a preset safety temperature, the free end 92 of the temperature-sensing bimetal 90 is thermally deformed backwardly based on the rear end of the fixed end 91 by a thermal expansion coefficient.

Subsequently, as the free end 92 of the temperature-sensing bimetal 90 undergoes backward deflection thermal deformation, the ambient temperature of the housing 10 between the fixed end 91 and the free end 92 is a predetermined safety temperature. The acute angle θ3 in the above case is increased than the acute angle θ2 when the ambient temperature of the housing part 10 is less than a predetermined safety temperature.

Accordingly, as the free end 92 pushes the inclined support portion 21b backward, the inclined support portion 21b is rotated downward about the rotation center protrusion 21c and at the same time, the contact plate portion 21a is the The fixed contact portion 13 and the movable contact portion 22 are separated from each other by being rotated upward about the rotation center protrusion 21c.

That is, when the ambient temperature of the housing portion 10 is greater than or equal to a predetermined safety temperature, the fixed contact portion 13 and the movable contact portion through pressure rotation of the contact plate portion 21a by the temperature sensing bimetal 90 (22) are separated from each other, regardless of the on/off state of the circuit breaker 100, the current flow is quickly blocked.

At this time, even if the user arbitrarily rotates the handle portion 80, the free end 92 maintains a state in which the inclined support portion 21b is pressed, so that the fixed contact portion 13 and the movable contact portion 22 ) Are separated from each other.

Then, when the ambient temperature of the housing portion 10 is lowered from above a predetermined safety temperature to less than a predetermined safety temperature, the free end 92 of the temperature sensing bimetal 90 in a backward deflection deformed state is turned to an initial state. Is restored. That is, the angle between the fixed end 91 and the free end 92 is restored to the acute angle θ2 when the ambient temperature of the housing part 10 is less than a preset safety temperature.

As described above, a fixed end 91 is coupled and fixed to an upper portion of the crossbar 30 in the contact plate rotation temperature sensing breaker 100 according to the present invention, so that it has an acute angle θ2 from the rear end of the fixed end 91. A free end 92, which is bent downwardly and extended downward, is disposed opposite to the upper portion of the contact plate portion 21a, and the temperature sensing bimetal 90 is provided with a rear surface having a lower coefficient of thermal expansion than the front side.

Through this, when the ambient temperature of the housing portion 10 rises above a predetermined safety temperature, the rear end of the contact plate portion 21a is bent as the free end 92 is flexibly deformed based on the fixed end 91. When the portion is pressed downward, the contact plate portion 21a is rotated around the rotation center protrusion 21c, so that the front end is spaced apart from the power input portion 11 to block current flow.

Accordingly, when the ambient temperature of the housing part 10 rises above a predetermined safety temperature, the free end 92 is bent backwards based on the fixed end 91 of the temperature sensing bimetal 90 fixed to the crossbar 30. When the contact plate portion 21a is pressed as the heat is deformed, the contact plate portion 21a is rotated to be spaced apart from the power input portion 11, thereby automatically blocking current flow during a fire to prevent a secondary safety accident. Through this, the safety of use of the product can be significantly improved.

In addition, when the ambient temperature of the housing portion 10 rises above a predetermined safety temperature, the free end 92 is deflected backwards relative to the fixed end 91 to be obtuse from the rear end of the contact plate portion 21a. The inclined support portion 21b, which is bent upwardly to have (θ1), is pressed. At this time, the rear end of the fixed end 91 is disposed opposite to the upper side of the inclined support portion (21b), the free end 92 is the inclined support portion when the ambient temperature of the housing portion 10 is less than a predetermined safety temperature It is spaced parallel to the upper part of (21b). Therefore, even if the user arbitrarily rotates the handle portion 80, the inclined support portion 21b is kept pressed and rotated by the free end 92, so that the fixed contact portion 13 and the movable contact portion ( As 22) is kept separated from each other, the current is cut off, so the safety of use can be significantly improved.

In addition, since the sum of the acute angle (θ2) and the obtuse angle (θ1) when the ambient temperature of the housing part 10 is less than a predetermined safety temperature is set to a substantially 180°, the free end 92 is the housing part ( When the ambient temperature of 10) is less than a predetermined safety temperature, the operation precision can be remarkably improved by being spaced apart from the inclined support portion 21b.

In addition, by aligning the first fixing hole 91a formed through the fixing end 91 with the second fixing hole 32 formed through the upper portion of the crossbar 30, the temperature is sensed through the fastening member 93. With a simple assembly structure for fastening the fixed end 91 of the bimetal 90 to the upper part of the crossbar 30, assembling performance and productivity can be remarkably improved.

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

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

10: housing unit 11: power input unit
12: load output section 20: movable switching section
30: crossbar 40: coil
41: magnetic core 50: amateur
60: yoke 70: latch
73: cradle 75: trip bar
80: handle 90: temperature sensing bimetal
100: rotary temperature sensor circuit breaker

Claims (5)

A housing unit provided with a power input unit and a load output unit spaced apart at the front and rear sides;
A movable switching unit provided with a contact plate portion selectively connected 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 portion to selectively press the contact plate portion;
A coil which is electrically connected between the rear portion of the contact plate portion and the load output portion and is disposed surrounding an outer periphery of a magnetic core that selectively forms a suction force;
When the overcurrent occurs in the coil, the armature includes a suction end that is suction-rotated on the upper portion of the magnetic core and a driving end that is integrally downwardly bent from the front end side of the suction end and rotates integrally to perform a trip operation;
A trip bar disposed opposite to the lower front of the driving end portion and disposed to move back and forth in a handle mounting portion provided in the housing portion;
The latch bar is connected to the lower end, the central portion is provided with a latch portion that is rotated back and forth relative to the latch rotation axis connected to the handle mounting portion;
A cradle having an upper end selectively engaged with the upper portion of the latch, and having a lower end rotated back and forth relative to a cradle rotation axis connected to the handle mounting portion;
A handle part coupled to the handle mounting part provided in the housing part to be rotated back and forth, and linked to the cradle at the bottom, but a link part for downwardly pressing the crossbar according to a rotation direction; And
A fixed end is fixedly coupled to an upper portion of the crossbar, and a free end that is bent downwardly downwardly extending to have an acute angle from a rear end of the fixed end is disposed opposite to the upper portion of the contact plate portion, and the ambient temperature of the housing portion is preset. When the free end is bent and deformed backwards based on the fixed end when the temperature rises above the temperature, when the rear end portion of the contact plate portion is pressed downward, the contact plate portion is rotated so that the rear surface is formed with a lower coefficient of thermal expansion than the front side. Includes temperature sensing bimetal,
The contact plate portion is formed with an inclined support portion that is bent and extended upward to have an obtuse angle from the rear end,
When the ambient temperature of the housing portion rises above a predetermined safety temperature, the free end is flexibly deformed backward with respect to the fixed end to press the inclined support, so that the rear end of the fixed end is disposed opposite to the upper side of the inclined support , The free end is a contact plate portion rotary temperature sensing circuit breaker, characterized in that spaced apart parallel to the upper portion of the inclined support portion when the ambient temperature of the housing portion is less than a predetermined safety temperature. delete According to claim 1,
The sum of the acute angle and the obtuse angle when the ambient temperature of the housing portion is less than a preset safety temperature is substantially 180° so that the free end is spaced apart from the inclined support portion when the ambient temperature of the housing portion is less than a preset safe temperature. It is set to the contact plate rotation temperature sensing circuit breaker. According to claim 1,
A first fixing hole is formed in the vertical direction through the fixing end, and a second fixing hole is formed in the vertical direction through the upper portion of the crossbar so that the first fixing hole is aligned.
A contact plate rotation temperature sensing circuit breaker further comprising a fastening member fastened to the first fixing hole and the second fixing hole. According to claim 1,
The contact center portion protrudes from the center of rotation to provide a reference axis of rotation from the central side so that the free end presses the inclined support portion so that the contact plate portion is spaced from the power input portion,
The crossbar is a contact plate portion rotating temperature sensing circuit breaker, characterized in that coupled to the rotation center projection to selectively press the front end portion of the contact plate portion.

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