KR102088932B1 - instant elastic attraction type circuit breaker - Google Patents

Abstract

The present invention provides an instant elastic absorption-type circuit breaker which has a simplified constitution, rapidly blocks a flow of current when an overcurrent occurs, and improves driving reliability. According to the present invention, the instant elastic absorption-type circuit breaker comprises: a housing unit in which a power input unit and a load output unit are arranged on a front side and a rear side to be apart from each other; an operation switching unit which is arranged between the power input unit and the load output unit for selectively connecting power, and in which a linking wire is arranged on a rear end unit to be connected to the load output unit; a crossbar in which a passing unit is formed on one side to have an opening to allow a front end side of the operation switching unit to cross, and which is elastically supported upwards through an elastic means arranged on a lower end unit; a trip unit which is arranged on a rear surface side of the crossbar to face the crossbar, and which rotates forward and backward around a lower end unit, and in which an inclined end bump protrudes forward from a front surface unit; a latch unit in which a front end unit is arranged on an upper surface of the crossbar to face the upper surface, and a rear end unit comes in contact with and is supported by an upper surface of the inclined end bump to allow the operation switching unit to be connected by a contact point, thereby pressurizing the crossbar downwards; a handle unit which is joined with the housing unit to be rotated forward and backward and be operated, and in which a pressurizing member, which rises and falls to pressurize the latch unit downwards in a rotating direction, is connected to a lower end unit; a solenoid in which an input end is electrically connected to the load output unit but is disconnected from an output end, and a plunger hangs on and is connected to the trip unit to link and make the trip unit retreat to allow the latch unit, which pressurizes the crossbar, to be apart from the inclined end bump; and a pair of elastic absorption units which are arranged to be apart from each other by wrapping around an outer circumference of the linked wire, are respectively connected to an input end and an output end of the solenoid, and mutually apply current by being elastically absorbed when an overcurrent occurs.

Description

Instantaneous elastic attraction type circuit breaker

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

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

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

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

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

Korean Utility Model No. 20-0341427

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

In order to solve the above problems, the present invention, the power input unit and the load output unit is provided with a housing spaced apart at the front and rear sides; A movable switching unit arranged for selective power connection between the power input unit and the load output unit, and provided with an interlocking wire connected to the load output unit at a rear end; A crossbar formed on one side via a transverse opening which is opened such that the front end side of the movable switching portion is transverse, but supported by an elastic means provided at the lower end, and supported by a cross bar; A trip portion disposed opposite to the rear side of the crossbar and rotated back and forth around the lower end portion, but having an inclined step forward in the front portion; A front end portion facing the upper surface of the crossbar, but a rear end portion in contact with the upper surface of the inclined step so that the power input portion and the movable switching portion are in contact with each other; a latch portion for pressing the crossbar downward; A handle unit coupled to the housing unit to be rotated back and forth, and a pressing member connected to the lower end to move upward and downward to press the latch unit downward according to a rotation direction; A solenoid having an input terminal electrically connected to the load output unit, disconnected from the output terminal, and having a plunger hooked to the trip unit to retract the trip unit to separate the latch unit from the inclined step to press the crossbar; And a pair of elastic suction portions of a magnetic material that are provided in a pair and are spaced apart from each other surrounding the outer periphery of the interlocking wires and connected to the input and output terminals of the solenoid, and are elastically sucked and energized with each other when overcurrent occurs. The ends are electrically connected to the input and output ends of the solenoid, respectively, and the energizing ends are spaced apart from each other in the normal allowable current range, and the elastic suction part wraps the outer periphery of the interlocking wire between the fixed end and the energizing ends. It is formed to be rounded with a predetermined radius of curvature around the interlocking wire so as to be arranged, but suction portions are formed to be sucked elastically to the interlocking wire side by the suction magnetic force generated by the interlocking wire when overcurrent occurs, respectively, and the interlocking wire and the load output unit A loader that is electrically connected between It provides an instantaneous elastic suction type circuit breaker further comprising a terminal, and a lead wire electrically connected between the input terminal of the solenoid and the load terminal.

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

First, a pair of elastic suction parts surrounding the outer periphery of the interlocking wires and being spaced apart from each other but connected to the input and output terminals of the solenoid are elastically sucked instantaneously when energized and energized, so that the plunger of the solenoid is operated. A circuit breaker with a high current blocking speed can be provided.

Second, the suction part of each elastic suction part formed roundly with a predetermined radius of curvature centering on the interlocking wire between the fixed end electrically connected to the input end and the output end of the solenoid and the energized end spaced apart from each other in the normal allowable current range. Since it is arranged to be spaced apart from each other, each elastic suction part that is elastically sucked only when an overcurrent occurs is energized, so that the solenoid is driven, so that the operation precision and driving reliability can be improved.

Third, when a pair of elastic suction parts are energized with each other, power is supplied to the solenoid through a lead wire that is electrically connected between the input terminal of the solenoid and the load terminal, so that the plunger of the solenoid contracts and the tripped part is quickly retracted and the current flow immediately As it is blocked, the current blocking speed can be significantly increased.

Fourth, the plunger of the solenoid is connected to the tripping part, and when the elastic suction of each elastic suction part is retracted, the current is cut in a simple way that the restraint of the latch part supported on the front is physically released. Since no parts are required, manufacturing cost is reduced and economic efficiency can be significantly improved.

1 is a perspective view showing a state in which the cover of the instantaneous elastic suction type circuit breaker according to an embodiment of the present invention is separated and the inside is exposed.
Figure 2 is a perspective view showing the coupling state of the components except the housing portion in the instantaneous elastic suction type circuit breaker according to an embodiment of the present invention.
3 is a perspective view showing an elastic suction unit in the instantaneous elastic suction type circuit breaker according to an embodiment of the present invention.
Figure 4 is an exemplary view showing the operating state of the instantaneous elastic suction type circuit breaker according to an embodiment of the present invention.
Figure 5 is an exemplary view showing the operating state of the elastic suction unit when an overcurrent occurs in the instantaneous elastic suction type circuit breaker according to an embodiment of the present invention.
Figure 6 is an exemplary view showing the operating state of the instantaneous elastic suction type circuit breaker according to an embodiment of the present invention.

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

1 is a perspective view showing a state in which the cover of the instantaneous elastic suction type circuit breaker according to an embodiment of the present invention is separated, and FIG. 2 is a housing part in the instantaneous elastic suction type circuit breaker according to an embodiment of the present invention 3 is a perspective view showing an elastic suction part in an instantaneous elastic suction type circuit breaker according to an embodiment of the present invention, and FIG. 4 is an instantaneous elastic suction type according to an embodiment of the present invention. An exemplary view showing the operating state of the circuit breaker, Figure 5 is an exemplary view showing the operating state of the elastic suction unit in the event of an overcurrent in the instantaneous elastic suction type circuit breaker according to an embodiment of the present invention, Figure 6 is an embodiment of the present invention It is an exemplary view showing the operating state of the instantaneous elastic suction type circuit breaker. At this time, it is desirable to understand the instantaneous elastic suction type circuit breaker and the circuit breaker in the same sense.

1 to 6, the instantaneous elastic suction type circuit breaker 900 according to an embodiment of the present invention includes a housing part 910, a movable switching part 920, a crossbar 930, and a trip part 940. , A latch part 50, a handle part 60, an elastic suction part 970 and a solenoid 990.

In detail, the housing part 910 includes an internal space in which components of the circuit breaker 900 are accommodated, and is preferably formed of an insulating and non-combustible synthetic resin material. A partition partition wall, an installation groove or a hole is formed inside the housing part 910 so that each component is installed and assembled. Here, the front side of the housing unit 910 is provided with a power input unit 911 connected to the power supply side, a rear side is provided with a load output unit 912 connected to the load side, and the power input unit 911 has a fixed contact unit ( 913) is provided.

In addition, the movable switching unit 920 is disposed for selective power connection between the power input unit 911 and the load output unit 912. Here, the movable switching unit 920 is preferably provided with a first plate portion 921 and a second plate portion (922).

In detail, the first plate portion 921 includes a first magnetization facing portion 923, the front end portion of which is adjacent to the fixed contact portion 913 but extends rearward. In this case, the first magnetization facing portion 923 may be provided by bonding one side to each other in a state in which a plurality of thin metal plates such as copper overlap. Here, a movable contact portion 925 which is selectively contact-connected to the fixed contact portion 913 is provided at a front end portion of the first magnetization facing portion 923. That is, it is preferable to understand that the first plate portion 921 includes the first magnetization facing portion 923 and the movable contact portion 925 provided on the front end side thereof. At this time, the first magnetization facing portion 923 is preferably formed of a conductive metal material that provides elastic resilience so that the movable contact portion 925 is in contact with the fixed contact portion 913 so as to be energized and selectively spaced apart. .

In addition, the second plate portion 922 has a second magnetization facing portion at a front end portion which is connected to a rear end portion of the first plate portion 921 and is bent upward in an intersection with the first plate portion 921. It is preferred that (924) is formed. Here, the rear end portion of the first magnetization facing portion 923 and the rear end portion of the second magnetizing facing portion 924 overlap, but are fixed to the housing portion 910 through screws. The second plate portion 922 is formed of a conductive metal material, like the first magnetization facing portion 923, and is electrically connected to the load output portion 912 through an interlocking wire 915. At this time, between the interlocking wire 915 and the load output unit 912, a rod terminal 914 bent in a 'b' shape may be electrically connected. At this time, the load terminal 914 is made of a magnetic material such as metal, one end is electrically connected to the interlocking wire 915, and the other end can be electrically connected to the load output unit 912.

Therefore, when the front end portion of the first plate portion 921 is pressed downward, the fixed contact portion 913 and the movable contact portion 925 contact, and the power input unit 911, the first plate portion 921, Current flows through the second plate portion 922, the interlocking wire 915, the load terminal 914, and the load output portion 912.

Here, the first magnetized face portion 923 and the second magnetized face portion 924 are preferably formed of a metal material that is conductive and is magnetized through a current. Of course, in some cases, the second magnetization facing portion 924 may be formed of a bimetal having a different thermal expansion coefficient at the front and rear sides, while being magnetized. That is, when the temperature of the second plate portion 922 rises due to the current resistance heat through the overcurrent, it may be formed to be bent toward the rear side having a low thermal expansion coefficient.

Meanwhile, the crossbar 930 is provided to press the front end portion of the first plate portion 921 downward. Here, the crossbar 930 is provided on the front end side of the first plate portion 921, and a light oil portion 931 is formed so that the front end portion of the first plate portion 921 crosses. At this time, it is preferable to understand that the front end portion of the first plate portion 921 is substantially pressed as the front end portion of the first magnetized face portion 923 is pressed. The crossbar 930 is pressurized to the lower side by the pressing force applied from the upper side, but is supported by the upper side through the elastic means provided in the lower portion.

In detail, in the normal state, the force to which the crossbar 930 is pressed downward acts more than the elastic force of the elastic means. Therefore, the state in which the crossbar 930 is pressed downward is maintained, and the elastic means is compressed. Then, the front end portion of the first plate portion 921 disposed across the light oil portion 931 is bent and pressed downward. Through this, the movable contact portion 925 is contacted with the fixed contact portion 913. At this time, when an overcurrent occurs or the force pressing the crossbar 930 through the manipulation of the handle unit 60 is lost, the crossbar 930 is moved upward through the elastic restoration force of the elastic means. At the same time, since the pressing force that pressurized the first plate portion 921 is lost, the movable contact portion 925 is spaced apart from the fixed contact portion 913 while the first magnetized face portion 923 is expanded through the elastic restoration force. do.

On the other hand, the trip portion 940 is disposed opposite to the rear side of the second magnetizing face portion 924, and is provided to be rotated back and forth around a pivoting end formed at the lower end. At this time, an inclined stepped portion 941 is protruded forward on the front portion of the trip unit 940. In addition, a locking groove may be recessed at one side of the trip unit 940 so that the plunger 991 of the solenoid 990, which will be described later, is engaged.

In addition, the latch portion 50 has a front end portion facing the upper surface of the crossbar 930, and a rear end portion extending to a length facing the front portion of the trip portion 940. At this time, the rear end portion of the latch portion 50 is formed to be in contact with or adjacent to the inclined step 941. In addition, the handle portion 60 is coupled to be rotated back and forth to the housing portion 910, and a pressing member 61 that is moved up and down to press the latch portion 50 downwardly according to a rotational direction is connected to the lower portion. . In this case, the rotational direction means a connection direction in which the movable contact portion 925 and the fixed contact portion 913 contact, and a movable direction in which the movable contact portion 925 and the fixed contact portion 913 are spaced apart. It is desirable to understand that it covers the blocking direction. Hereinafter, the connection direction will be described and illustrated in a direction that rotates to the front, and the blocking direction will be described and illustrated in a direction that rotates to the rear.

In detail, the pressing member 61 is moved downward while the handle portion 60 is rotated in the connection direction. At this time, the pressing member 61 is hinged to the elevating connecting portion formed on the central side of the latch portion 50. Therefore, when the pressing member 61 is moved downward, the latch portion 50 is moved in conjunction, but the rear end portion of the latch portion 50 is supported in surface contact with the inclined upper surface of the inclined step 941. Then, while the rear end of the latch portion 50 is supported by the inclined stepped 941, the front end rotates downward to contact the latch pressing portion 932 and press the crossbar 930, and the fixed contact portion ( 913) and the movable contact portion 925 are contact-connected.

On the other hand, the elastic suction unit 970 is provided in a pair surrounding the outer periphery of the interlocking wire 915 and spaced apart from each other but is electrically connected to the input terminal 994 and the output terminal 995 of the solenoid 990, respectively. Here, the elastic suction part 970 is provided in a pair, and is elastically sucked by the suction magnetic force generated in the interlocking wire 915 when an overcurrent occurs and is electrically connected to each other.

The elastic suction part 970 is preferably provided with a magnetic material. At this time, the magnetic material is preferably understood as a metal containing a large amount of ferrous (Fe) components, such as pure iron or cast iron. In addition, the elastic suction unit 970 may be provided in the form of a curved thin plate having a predetermined elastic elastic force to be elastically sucked by the suction magnetic force generated in the interlocking wire 915. Therefore, since the elastic suction part 970 for instantaneous current blocking of the circuit breaker 1100 is provided as a pair of simple shaped parts, manufacturability can be remarkably improved.

In detail, the elastic suction part 970 includes a first elastic suction part 971 and a second elastic suction part 972. At this time, the first elastic suction portion 971 and the second elastic suction portion 972 are arranged to be spaced apart from each other by surrounding the interlocking wire 915, and are spaced apart from each other on the upper and lower portions of the interlocking wire 915. desirable. At this time, in the embodiment of the present invention, the first elastic suction portion 971 and the second elastic suction portion 972 are respectively disposed on the upper and lower portions of the interlocking wire 915, as an example. However, it is not limited thereto.

In addition, the fixed end of each elastic suction unit 970 is electrically connected to the input terminal 994 and the output terminal 995 of the solenoid 990, respectively, and is insulated from each other, and the energizing terminals are spaced apart from each other in the normal allowable current range. do. Here, the first elastic suction unit 971 is a fixed end is electrically connected to the output terminal 995 of the solenoid 990, the second elastic suction unit 872 is a fixed end of the solenoid 990 It may be electrically connected to the input terminal 994. At this time, the input terminal 994 and the output terminal 995 of the solenoid 990 are disconnected from each other and are not driven in the normal allowable current range.

On the other hand, each of the elastic suction portion 970 has suction portions 971a and 972a, suction contacts 971b and 972b, stopper protrusions 971c and 972c, elastic bending portions 971d and 972d, and coupling portions 971e and 972e. ) Is preferably formed integrally with each other.

In detail, each elastic suction part 970 is formed between the fixed end and the energized end, and is rounded so as to surround the outer circumference of the interlocking wire 915 and is arranged to be spaced apart. Suction generated in the interlocking wire 915 when an overcurrent occurs It is preferable that the suction portions 971a and 972a which are elastically sucked to the side of the interlocking wire 915 by magnetic force are formed, respectively. At this time, the suction portion 971a, 972a includes a first suction portion 971a formed in the first elastic suction portion 971 and a second suction portion 972a formed in the second elastic suction portion 972. It is preferred to include.

Further, it is preferable that each of the suction portions 971a and 972a is rounded to have a predetermined radius of curvature around the interlocking wire 915. Through this, the distance between the surfaces of the suction parts 971a and 972a from the interlocking wire 915 is formed substantially uniformly. Therefore, when overcurrent is generated, the suction magnetic force generated in the interlocking wire 915 is uniformly transmitted to each of the suction portions 971a and 972a, so that operational precision can be improved.

In addition, it is preferable that the suction contact points 971b and 972b that are energized to be extended to each other in opposite directions are formed on opposite sides of the elastic suction portion 970 in the direction opposite to each other. At this time, the suction contact (971b, 972b) is a first suction contact (971b) formed in the first elastic suction portion (971), and a second suction contact (972b) formed in the second elastic suction portion (972b) It is preferred to include.

Here, the suction contacts 971b and 972b are in contact with each other as the suction portions 971a and 972a are elastically sucked in opposite directions by the suction magnetic force generated in the interlocking wire 915 when an overcurrent occurs. At this time, the output terminal 995 and the input terminal 994 of the solenoids 990 that are mutually open in the normal allowable current range are electrically connected to the first elastic suction unit 971 and the second elastic suction unit 972. In the connected state, the solenoids 990 may be energized and driven as each of the suction contacts 971b and 972b contact each other when an overcurrent occurs.

In detail, even if the interlocking wire 915 is magnetized by the flow of electric current, in the normal allowable current range, each elastic suction unit 970 is elastically sucked and must be set so as not to be in contact with each other. In addition, each of the elastic suction unit 970 must be elastically sucked by the suction magnetic force formed in the interlocking wire 915 in an overcurrent state exceeding the normal allowable current range to be energized to each other.

To this end, the elastic restoring force of each elastic suction part 970 is greater than the suction magnetic force generated in the interlocking wire 915 in the normal allowable current range, and in the overcurrent state, it is greater than the suction magnetic force generated in the interlocking wire 915. It is preferably set small.

In addition, the spacing between each of the suction contacts (971b, 972b) is installed to maintain the calculated gap value. At this time, the calculated gap value means that the suction magnetic force affects each elastic suction unit 970 so that the circuit breaker 900 is normally driven in response to a preset normal allowable current range and a cutoff current required to be cut off. It is desirable to understand the range of intervals that can be given. That is, when the cut-off current is measured as a small value, the separation interval is formed narrowly, and when the cut-off current is measured as a large value, the separation interval can be formed broadly.

Then, each of the suction contact points (971b, 972b) is spaced apart from each other in the normal allowable current range, and is sucked and rotated to the side of the interlocking wire (915) where suction magnetic force is generated when an overcurrent occurs and elastically sucks in opposite directions to be energized. Can be. Through this, the breaker 900 can be clearly cut off when an overcurrent occurs, so that driving reliability can be significantly improved.

On the other hand, the stopper of the elastic suction portion 970 is protruded forward to bend integrally from the energized end, and the stoppers respectively engaged to both inner surfaces of the slits 992a formed in the PC portion 992 in the normal allowable current range. It is preferable that the projections 971c and 972c are formed. At this time, the stopper protrusions (971c, 972c) is a first stopper protrusion (971c) formed on the first elastic suction portion (971), and the second stopper protrusion (972c) formed on the second elastic suction portion (972c) It is preferred to include.

Here, the PCB portion 992 for driving the solenoid 990 is provided between the rear side of the solenoid 990 and the front side of the elastic suction portion 970, but is provided at an edge of the PCB portion 992. It is preferable that the slits 992a are recessed in correspondence with the spacing between the energizing ends of the elastic suction part 970 in the vertical direction. Through this, each of the elastic suction parts 970 in the normal allowable current range is spaced apart from each other by its elastic restoring force in the direction away from each other, that is, in the vertical direction, wherein each of the stopper protrusions 971c and 972c is the slit 992a. ).

In addition, the elastic bent portions 971d and 972d are bent in opposite directions so that elastic restoring force is provided to each of the elastic suction portions 970 in a direction spaced apart from the suction portions 971a and 972a and the fixed ends. It is preferred that each of the fork is formed. Here, it is preferable to understand that the elastic bent portions 971d and 972d are formed to be bent in a direction symmetric to the direction in which the round shape of the suction portions 971a and 972a is formed. At this time, the elastic bending portion (971d, 972d) is a first elastic bending portion (971d) formed on the first elastic suction portion (971d), and the second elastic bending portion (972d) formed on the second elastic suction portion (972d) It is preferred to include.

Through this, each of the suction portions 971a and 972a and each of the suction contacts 971b and 972b elastically sucked in directions opposite to each other by the suction magnetic force generated in the interlocking wire 915 when an overcurrent is generated is the fixed contact portion When the current flow is blocked as the 913 and the movable contact portion 925 are separated from each other, elastic recovery may be performed in a direction away from each other by the elastic bending portions 971d and 972d.

In addition, it is preferable that the coupling portions 971e and 972e which extend forward and protrude to be integrally bent from the fixed ends are formed at the fixed ends of the elastic suction parts 970, respectively. In this case, the coupling portions 971e and 972e include a first coupling portion 971e formed in the first elastic suction portion 971 and a second coupling portion 971e formed in the second elastic suction portion 972. It is preferred to include. Here, the first coupling portion 971e is preferably coupled to the output terminal 995 of the solenoid 990 through a method such as soldering, and the second coupling portion 972e is the input terminal of the solenoid 990 (994) is preferred.

Meanwhile, the solenoid 990 is preferably electrically connected to the load terminal 914 and the load output unit 912 through a lead wire 933 electrically connected to the input terminal 995 of the solenoid 990. Do. At this time, the lead wire 933 is preferably electrically connected between the input terminal 995 of the solenoid 990 and the load terminal 914.

Here, in the normal allowable current range, the solenoid 990 is electrically connected to the load terminal 914 through the lead wire 933, but the input terminal 994 and the output terminal 995 of the solenoid 990 mutually Since it is open, a closed circuit is not formed and is not driven.

In addition, the solenoid 990, the latch portion 50 for urging the crossbar 930 according to the optional power supply to interlock the trip portion 940 to be spaced apart from the inclined stepped 941 It is preferable that a plunger 991 is connected to the engaging groove of the trip unit 940.

At this time, the solenoid 990 is cut off the power supply in the normal allowable current range in which no current flow occurs in the elastic suction unit 970. Accordingly, the plunger 991 of the solenoid 990 is disposed in a state protruding from the solenoid 990 in the normal allowable current range. In addition, in the solenoid 990, when an overcurrent occurs, the plunger 991 is contracted and inserted into the solenoid 990.

Here, an end portion of the plunger 991 may be formed with an extended step extending radially outward along the circumferential direction. In addition, the extension step is disposed on the front portion of the trip portion 940, it is preferable that the engaging portion is connected to the engaging groove of the trip portion (940).

Meanwhile, when current flows through the power input unit 911, the first plate unit 921, the second plate unit 922, the interlocking wire 915, the load terminal 914, and the load output unit 912 ) As the current flows and becomes magnetized. At this time, when the overcurrent flows in, the suction magnetic force that sucks metal in the surroundings increases in response to the current through which the interlocking wire 915 flows. Here, each of the elastic suction portions 970 is provided with a magnetic material, and is electrically connected to each other as they are elastically suction rotated in directions opposite to each other by the suction magnetic force and electrically connected. Accordingly, when an overcurrent occurs, the load terminal 914, the lead wire 993, the input unit 994 of the solenoid 990, the winding unit of the solenoid 990, the output unit 995 of the solenoid 990 , Current flow may be sequentially formed to the elastic suction parts 970 and the load terminals 914 that are in contact with each other.

That is, when the overcurrent occurs, the solenoid 990 is supplied with power through the lead wire 993 as each elastic suction unit 970 contacts and energizes. Here, as power is supplied to the solenoid 990, the plunger 991 is contracted and inserted into the solenoid 990 when an overcurrent occurs. At the same time, the trip portion 940, which is connected to the plunger 991, is instantaneously retreated. Accordingly, the rear end portion of the latch portion 50 is spaced apart from the inclined stepped portion 941, and the restraining force that pressurized and supports the latch portion 50 is lost. Through this, the pressing force applied to the crossbar 930 is removed, and the movable contact portion 925 and the fixed contact portion 913 can be spaced apart while the first magnetization facing portion 923 is recovered and unfolded. have.

Accordingly, when the overcurrent occurs, each of the elastic suction units 970 rapidly energizes each other, and the trip unit 940 interlocked therewith is quickly interlocked and retracted, so that the current may be temporarily blocked.

In addition, each of the elastic suction unit 970, the fixed contact portion 913 and the movable contact portion 925 are spaced apart from each other, and when the current flow is blocked, the suction magnetic force of the interlocking wire 915 is lost. The elastic restoring force of the bent portions 971d and 972d may be elastically restored to the initial arrangement position. Here, the initial placement position of the elastic suction part 970 is preferably understood as a position where each of the suction contacts 971b and 972b are spaced apart from each other in the normal allowable current range.

On the other hand, the handle portion 60 is hinged to the support frame provided in the housing portion 910, when the restraining force was pressed and supported by the latch portion 50 is lost through the elastic recovery force of the return means provided on one side It is rotated in the blocking direction. At this time, the return means may be provided with a torsion spring or plate spring. In addition, the pressing member 61 hinged to the lower end of the handle portion 60 is moved upward, and the latch portion 50 can be completely separated from the crossbar 930 and the trip portion 940.

At this time, when the handle portion 60 is rotated in the connection direction so that the current is reconnected, the pressing member 61 is moved downward, but the rear end portion of the latch portion 50 moves toward the inclined step portion 941 and its upper surface. It is supported in contact again. Then, when the pressing force of the pressing member 61 is continuously transmitted in a state where the rear end portion of the latch portion 50 is supported, the front end portion of the latch portion 50 is moved downward. At this time, the first plate portion 921 is pressed downward as the front end portion of the latch portion 50 is contacted and the pressing force is transmitted to the lower side of the latch pressing portion 932, and the movable contact portion 925 and the The fixed contact portion 913 is manipulated to contact again.

In addition, a return means for returning the rotation angle of the trip unit 940 is further provided on the rotation end side. Therefore, after the rear end of the latch portion 50 is rotated in the rear direction so as to be spaced apart from the inclined step 941, the position is immediately returned through the return means.

As described above, the instantaneous elastic suction type circuit breaker 900 according to the present invention is provided in a pair and surrounds the outer periphery of the interlocking wire 915 and is spaced apart from each other, but connected to the input terminal 994 and the output terminal 995 of the solenoid 990, respectively. The elastic suction part 970 made of a magnetic material is provided. In addition, when the overcurrent occurs, power is supplied to the lead wire 993 as each of the elastic suction units 970 is instantaneously elastically sucked in the direction opposite to each other by the suction magnetic force generated in the interlocking wire 915 and energized with each other. do. Through this, since the plunger 991 of the solenoid 990 electrically connected to the lead wire 993 is operated, it is possible to be provided with a circuit breaker 900 having a faster current blocking speed than a bimetal bent through a conventional resistance heat.

In addition, a predetermined radius of curvature centered on the interlocking wire 915 between a fixed terminal electrically connected to the input terminal 994 and the output terminal 995 of the solenoid 990 and a conductive terminal spaced apart from each other in a normal allowable current range. The suction portions 971a and 972a of each of the elastic suction portions 970 formed to be round are wrapped around the outer circumference of the interlocking wire 915 and are spaced apart. Accordingly, the energization end side of each of the elastic suction units 970 is energized with each other only when an overcurrent occurs, so that power is supplied to the solenoid 990 to be driven, thereby improving operational precision and driving reliability.

In addition, the suction portion (971a, 972a) of each of the elastic suction portion 970 is formed to be rounded with a predetermined radius of curvature around the interlocking wire 915 and spaced apart from the outer periphery of the interlocking wire 915. When the overcurrent occurs, it is quickly elastically attracted to each other. Accordingly, since each of the suction contacts 971b and 972b protruding and extending in a direction opposite to each other on the outside of each elastic suction part 970 is accurately energized, operation precision and driving reliability can be improved.

In addition, when each of the elastic suction parts 970 are energized with each other, the solenoid 990 is connected to the solenoid 990 through the lead wire 993 electrically connected between the input terminal 995 of the solenoid 990 and the load terminal 914. Power is supplied. Through this, the plunger 991 of the solenoid 990 contracts and the trip portion 940 connected thereto is rapidly retracted, so that the current flow is immediately blocked, so that the current blocking speed is significantly increased and driving reliability is significantly improved. You can.

Moreover, when the plunger 991 of the solenoid 990 is hooked and connected to the trip unit 940, when the elastic suction of each elastic suction unit 970 is retracted, the trip unit 940 is retracted and supported on its front surface. The current is cut off by a simple method in which the restraint of the latch part 50 is physically released. Therefore, expensive parts such as a video current transformer are not required, and thus economic efficiency through manufacturing cost reduction and product compactness can be significantly improved.

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

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

910: housing unit 920: movable switching unit
930: Crossbar 940: Trip section
50: latch portion 60: handle portion
970: elastic suction part 990: solenoid
991: plunger 800: instantaneous elastic suction type 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 disposed for selective power connection between the power input unit and the load output unit, and provided with an interlocking wire connected to the load output unit at a rear end;
A crossbar formed on one side via an opening through which the front end side of the movable switching portion is transverse, but supported by an elastic means provided at a lower portion, to be supported upwards;
A trip portion disposed opposite to the rear side of the crossbar and rotated back and forth around the lower portion, but having an inclined step forward in the front portion;
A front end portion facing the upper surface of the crossbar, but a rear end portion in contact with the upper surface of the inclined step so that the power input portion and the movable switching portion are in contact with each other; a latch portion for pressing the crossbar downward;
A handle portion coupled to the housing portion to be rotated back and forth, and a pressing member connected to a lower portion to be moved upward and downward to press the latch portion downward according to a rotation direction;
A solenoid having an input terminal electrically connected to the load output unit, disconnected from the output terminal, and having a plunger hooked to the trip unit to retract the trip unit to separate the latch unit from the inclined step to press the crossbar; And
It is provided as a pair and surrounds the outer periphery of the interlocking wire and is spaced apart from each other, and is connected to the input and output terminals of the solenoid, respectively, and includes an elastic suction part made of a magnetic material that is elastically sucked and energized with each other when an overcurrent occurs,
The fixed end of each elastic suction part is electrically connected to the input and output ends of the solenoid, respectively, and the energized ends are spaced apart from each other in the normal allowable current range.
Each of the elastic suction portions is formed to be rounded with a predetermined radius of curvature around the interlocking wire so as to surround the outer circumference of the interlocking wire between the fixed end and the energizing end, and to be spaced apart from each other. Each of the suction portion is elastically sucked to the interlocking wire side by,
And a load terminal electrically connected between the interlocking wire and the load output unit, and a lead wire electrically connected between the input terminal of the solenoid and the load terminal. delete The method of claim 1,
Instantaneous elastic suction-type circuit breakers, characterized in that the elastic suction portions are formed integrally with each other to bend in the mutually opposite directions so as to provide elastic restoring force in a direction spaced apart from each other between the suction portion and the fixed end. The method of claim 1,
Instantaneous elastic suction-type circuit breakers, characterized in that each of the elastic suction portions extends and protrudes in a direction opposite to each other in a direction opposite to the energized end, and suction contacts that are energized with each other when overcurrent occurs are formed. The method of claim 1,
Between the rear side of the solenoid and the front side of the elastic suction part, a PCB part is provided, and a slit is formed in the rim of the PCB part corresponding to the separation distance between the energized ends of the elastic suction parts,
Instantaneous elastic suction-type circuit breaker, characterized in that a stopper projection is formed on each of the inner surfaces of the slit in a normal allowable current range by bending forwardly extending at the energizing end of each elastic suction unit.

Images