Circuit breaking device

Abstract

The present invention provides a circuit breaking device capable of suppressing an increase in power of a power source and easily breaking a circuit, while being able to cope with an increase in the number of sections to be cut (fuse elements). A circuit breaking device (900) is provided with a housing part (200), external connection terminals (910) on both sides, a fuse element (100) housed in the housing part (200), and an arc extinguishing material (290), and is characterized by being provided with: a power mechanism (500) configured so as to apply a pulling force to an end part (110) of the fuse element (100) to break the fuse element (100); the electrical connection maintaining structure maintains an electrical connection between the fuse element (100) and the external connection terminal (910) until the fuse element (100) is broken.

Description

Technical Field

[0001] The invention of the present application mainly relates to a circuit breaking device that can be used in an electric circuit of an automobile or the like. Background Art

[0002] In the prior art, circuit breaker devices have been used to protect circuits and various electrical components connected to the circuits mounted on automobiles, etc. Specifically, when an abnormality occurs in the circuit, the circuit breaker device cuts off a part of the circuit to physically disconnect the circuit.

[0003] In addition, there are various types of circuit breaking devices. For example, the circuit breaking device of Patent Document 1 is a circuit breaking device including a housing, a cut-off portion (fuse element) arranged in the housing and constituting a part of the circuit, a power source arranged on one side of a first end of the housing, and a movable body moving between the first end and a second end on the side opposite to the first end in the housing. While the movable body moves from the first end toward the second end by the power source, a part of the movable body cuts off the cut-off portion to disconnect the circuit.

[0004] As the performance of automobiles and other equipment has improved in recent years, the voltage and current applied to the circuit have also tended to increase, so there are also cases where multiple cut-off parts (fuse elements) are used accordingly. However, since the moving body needs to cut off multiple cut-off parts (fuse elements), the number of cut-off positions increases and the shearing area of ​​the arc-extinguishing material contained inside increases. Then, the power used to cut off the cut-off part by the moving body must be increased, and as a result, the strength of the housing needs to be further improved in order to withstand the increased power (explosive force of gunpowder, etc.). In addition, there is also the problem of the housing becoming larger, the circuit breaker device becoming larger, and the price rising.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application No. 2020-080298 Summary of the invention

[0008] Technical problem to be solved by the invention

[0009] Therefore, in view of the above problems, the invention of the present application provides a circuit breaker device that can easily disconnect a circuit while suppressing an increase in the power of a power source, and can cope with an increase in the number of disconnected parts (fuse elements).

[0010] Technical solutions for solving technical problems

[0011] The circuit breaker device according to the invention of the present application is characterized in that it comprises a housing portion, external connection terminals on both sides, a fuse element housed in the housing portion, and an arc extinguishing material. The circuit breaker device comprises a power mechanism and an electrical connection maintaining structure. The power mechanism is configured to apply a pulling force to the end of the fuse element to disconnect the fuse element. The electrical connection maintaining structure maintains the electrical connection between the fuse element and the external connection terminals until the fuse element is disconnected.

[0012] According to the above-mentioned features, since the fuse element is disconnected and the circuit is broken by applying a pulling force to the fuse element, there is no need to shear the arc extinguishing material together with the fuse element as in the conventional case.

[0013] In addition, even when a plurality of fuse elements are provided, only the force for disconnecting the fuse elements increases, and unlike the conventional circuit breaker, the shearing area of ​​the arc extinguishing material does not increase, and the power of the power mechanism for generating the pulling force can be reduced compared to the conventional circuit breaker. As a result, according to the circuit breaker of the present invention, the increase in the power of the power source can be suppressed and the circuit can be disconnected easily, while the increase in the number of disconnected parts (fuse elements) can be coped with.

[0014] Furthermore, by the electrical connection maintaining structure, the current flowing through the circuit can stably flow until the end of the fuse element starts to move and the arc generated by breaking the fuse element is extinguished.

[0015] The circuit breaker device according to the invention of the present application includes a movable part, which is connected to the end of the fuse element. The movable part is moved by a power mechanism, and the moved movable part applies a pulling force to the end of the fuse element to disconnect the fuse element.

[0016] According to the above-described features, power can be efficiently transmitted to the end of the fuse element through the movable portion, and the fuse element can be efficiently disconnected.

[0017] In the circuit breaking device according to the invention of the present application, the power mechanism includes a power source and a moving body that moves by power generated by the power source, and the moving body moves the movable portion.

[0018] According to the above-mentioned features, power can be efficiently transmitted to the movable part through the moving body, and the fuse element can be efficiently disconnected.

[0019] In the circuit breaking device according to the invention of the present application, before the moving body moves, the moving body separates from the movable part, and after the moving body starts to move, the moving body abuts against the movable part, and the movable part moves.

[0020] According to the above features, the gap can be used to accelerate the moving body, and the moving body is fully accelerated from the initial speed to near the maximum speed at the moment when the moving body contacts the movable part. Then, since the fully accelerated moving body can instantly move the movable part laterally, the fuse element connected to the movable part can also be instantly disconnected, and the circuit can be cut off more quickly.

[0021] In the circuit breaking device of the invention of the present application, the electrical connection maintaining structure includes opposing clamping plates, and the movable portion includes a sliding portion that can move between the clamping plates while being sandwiched from both sides by the clamping plates and electrically connected.

[0022] According to the above features, the current flowing through the circuit can flow reliably and stably through the electrical connection maintaining structure via the clamping plate until the end of the fuse element starts to move and the arc generated by breaking the fuse element is extinguished.

[0023] In the circuit breaking device according to the invention of the present application, the sliding portion includes a conductive portion that can be electrically connected to the clamping plate and an insulating portion adjacent to the conductive portion. Before the movable portion moves, the conductive portion is located between the clamping plates, and after the movable portion moves, the insulating portion is located between the clamping plates.

[0024] According to the above-described feature, since the overcurrent (fault current) flowing from the external connection terminal and the clamping plate is disconnected by the insulating portion, the arc generated immediately after the fuse element is disconnected can be quickly extinguished.

[0025] In the circuit breaking device according to the invention of the present application, the electrical connection maintaining structure is formed of a plastically deformable conductor, and the conductor is connected to the external connection terminal and the movable portion.

[0026] According to the above features, by the electrical connection maintaining structure including the plastically deformable conductor, the current flowing through the circuit can flow reliably and stably until the end of the fuse element starts to move and the arc generated by breaking the fuse element is extinguished.

[0027] In the circuit breaker device according to the invention of the present application, a fastening portion for fastening the arc extinguishing material is accommodated in the accommodation portion, and the fastening portion is moved toward the periphery of the disconnecting portion of the fuse element by the power mechanism to fasten the arc extinguishing material.

[0028] According to the above feature, when the fuse element is disconnected to break the overcurrent, the arc extinguishing material fastened again by the fastening portion can efficiently extinguish the arc generated around the disconnected portion.

[0029] In the circuit breaking device according to the present invention, the fuse element includes a narrow portion, and the fuse element includes a tension auxiliary portion, and the tension auxiliary portion concentrates the tension on the narrow portion to break the narrow portion.

[0030] According to the above features, the tension assisting portion can define any narrow portion as a disconnecting portion according to the design, and can efficiently extinguish the arc generated during the disconnection.

[0031] Effects of the Invention

[0032] As described above, according to the circuit breaking device of the present invention, it is possible to easily break the circuit while suppressing an increase in the power of the power source, and to cope with an increase in the number of disconnected portions (fuse elements). BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is an overall perspective view of the circuit breaking device of the present invention according to the first embodiment.

[0034] Figure 2 is a top view of a circuit breaker device.

[0035] Figure 3 (a) is along Figure 2 A cross-sectional view taken along line AA, Figure 3 (b) is along Figure 2 A cross-sectional view taken along line BB.

[0036] Figure 4 It shows that the moving body Figure 2 The state shown is a top view of the state after the movement.

[0037] Figure 5 (a) shows the fuse element from Figure 3 The state shown in (a) is a cross-sectional view of the state after being broken, Figure 5 (b) shows the moving body from Figure 3 (b) is a cross-sectional view of the state after the state is moved.

[0038] Figure 6 This is an overall perspective view showing an exploded view of a power mechanism and an electrical connection maintaining structure of a circuit breaking device of the present invention according to a second embodiment.

[0039] Figure 7 is a top view of a circuit breaker device.

[0040] Figure 8 (a) is along Figure 7 A cross-sectional view taken along line CC of Figure 8 (b) is along Figure 7 A cross-sectional view taken along line DD.

[0041] Fig. 9 It shows that the moving body Figure 7 The state shown is a top view of the state after the movement.

[0042] Fig.10 (a) shows the fuse element from Figure 8 The state shown in (a) is a cross-sectional view of the state after being broken, Fig.10 (b) shows the moving body from Figure 8 (b) is a cross-sectional view of the state after the state is moved.

[0043] Fig.11 It is an overall perspective view showing an exploded view of a circuit breaking device according to the invention of the present application according to a third embodiment.

[0044] Fig.12 It is a top view of the circuit breaker device in an assembled state.

[0045] Fig.13 (a) is along Fig.12 A cross-sectional view taken along line EE of Fig.13 (b) is along Fig.12 A cross-sectional view taken along line FF.

[0046] Fig.14 It shows that the moving body Fig.12 The state shown is a top view of the state after the movement.

[0047] Fig.15 (a) shows the fuse element from Fig.13 The state shown in (a) is a cross-sectional view of the state after being broken, Fig.15 (b) shows the moving body from Fig.13 (b) is a cross-sectional view of the state after the state is moved.

[0048] Fig.16 It is a top view of the circuit breaking device of the invention of this application according to the fourth embodiment.

[0049] Fig.17 It is an overall stereoscopic diagram of the electromagnetic coil type tripping device of the power mechanism.

[0050] Fig.18 It is a plan view showing an enlarged view of a power mechanism and a moving body of the circuit breaker device.

[0051] Fig.19 Is a moving body from Fig.16 The state shown is a top view after movement.

[0052] Fig. 20 It is an overall perspective view of a circuit breaking device of the present invention according to a fifth embodiment.

[0053] Fig.21 is along Fig. 20 A cross-sectional view taken along line GG.

[0054] Fig. 22 It shows that the moving body Fig.21 The state shown is a top view of the state after the movement.

[0055] Fig.23 It shows that the moving body Fig. 22 The state shown is a top view of the state after further movement.

[0056] Fig.24 (a) is a side view of a fuse element of the invention of the present application according to a sixth embodiment, Fig.24 (b) is a side view of the fuse element of the invention of the present application according to the seventh embodiment, Fig.24 (c) is a side view of the fuse element of the invention of the application according to the eighth embodiment.

[0057] Fig.25 It is a top view of the circuit breaking device of the invention of this application according to the ninth embodiment.

[0058] Fig.26 It shows that the moving body Fig.25 The state shown is a top view of the state after the movement.

[0059] Description of Reference Numerals

[0060] 100: fuse element, 110: end portion, 200: accommodation portion, 290: arc extinguishing material, 300: movable portion 3, 900: circuit breaker device, 910: external connection terminal, F: tension. DETAILED DESCRIPTION

[0061] Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that the shapes, materials, etc. of various components of the circuit breaker device according to the following embodiments are merely examples and are not limited thereto.

[0062] <First Embodiment>

[0063] first, Figures 1 to 3 FIG. 9 shows a circuit breaker device 900 according to a first embodiment of the present invention. It should be noted that Figure 1 is an overall three-dimensional diagram of the circuit breaker device 900. Figure 2 is a top view of the circuit breaker device 900, Figure 3 (a) is along Figure 2 A cross-sectional view taken along line AA, Figure 3 (b) is along Figure 2A cross-sectional view taken along line BB.

[0064] like Figures 1 to 3 As shown, the circuit breaker device 900 has external connection terminals 910 on both sides, and the external connection terminals 910 are used to electrically connect to an external circuit. In addition, a plurality of fuse elements 100 are provided which are electrically connected to the external connection terminals 910 on both sides. Each fuse element 100 is formed of a thin sheet of metal plate made of a metal conductor such as copper, and has end portions 110 on both sides and a fuse portion 120 located between the end portions 110. Figure 3 As shown in (a), the fuse part 120 is formed with a plurality of small holes 121 in a part of the fuse element 100. These small holes 121 have a narrowed width, so when an unexpected overcurrent flows in a circuit, etc., heat is generated and melts, thereby disconnecting the overcurrent.

[0065] In addition, two fuse elements 100 are accommodated in each accommodating portion 200. The accommodating portion 200 is formed into a cylindrical shape with openings 210 at both ends, and the accommodating portion 200 can be composed of various materials such as ceramics and synthetic resins. In addition, each fuse element 100 is accommodated inside the accommodating portion 200, and the accommodating portion 200 is filled with granular arc-extinguishing material 290. It should be noted that although the accommodating portion 200 is filled with granular arc-extinguishing material 290 without gaps, only a part of the arc-extinguishing material 290 is shown in the figure in consideration of visibility.

[0066] The cover 920 as a part of the external connection terminal 910 closes one opening 210 of the accommodation portion 200 (the left side in the figure). The cover 920 and the end 110 of the fuse element 100 are connected and fixed to each other. In addition, the end 110 of the fuse element 100 and the cover 920 of the external connection terminal 910 are in an electrically connected state. On the other hand, the inner cover 930 as a part of the external connection terminal 910 closes the other opening 210 of the accommodation portion 200 (the right side in the figure). In addition, the end 110 of the fuse element 100 passes through the insertion hole 931 provided in the inner cover 930 and protrudes to the outside of the inner cover 930. The end 110 of the fuse element 100 is not connected and fixed to the insertion hole 931 of the inner cover 930, and the end 110 of the fuse element 100 can slide relative to the insertion hole 931, as described later.

[0067] The outer cover 940 made of metal is embedded in the outer side of the inner cover 930. The outer cover 940 is configured to be able to slide sideways when embedded in the outer side of the inner cover 930, and even when sliding, the outer cover 940 and the inner cover 930 are in a state of being electrically connected at the contact surface with each other. In addition, the inner cover 930 and the outer cover 940 constitute an electrical connection maintaining structure that maintains the electrical connection between the fuse element 100 and the external connection terminal 910. In addition, the end 110 of the fuse element 100 passes through the insertion hole 941 provided in the outer cover 940 and protrudes to the outside of the outer cover 940. The end 110 of the fuse element 100 is connected and fixed to the insertion hole 941 of the outer cover 940, and is also electrically connected.

[0068] In addition, the end 110 of the fuse element 100 protruding outside the outer cover 940 is connected and fixed to the movable part 300. The movable part 300 is an elongated metal plate and is electrically connected to the end 110 of each fuse element 100. In addition, the movable part 300 and the outer cover 940 are also connected and fixed, and are electrically connected to each other. As the movable part 300 moves laterally, the end 110 of each fuse element 100 and the outer cover 940 also move laterally as a whole.

[0069] Next, the configuration of the power mechanism 500 will be described. The power mechanism 500 is a substantially cylindrical body formed of an insulator such as a synthetic resin, and is provided with a housing portion 510 capable of accommodating the moving body 600 inside, and the power source 501 is provided at a first end portion 511 of the housing portion 510. In addition, an insertion hole 502 is provided on the second end portion 512 side of the housing portion 510, and a protrusion 610 of the moving body 600 is inserted. The moving body 600 is formed of an insulator such as a synthetic resin, and is provided with a sliding portion 620 that slides while contacting the inner surface of the housing portion 510, and a protrusion 610 that protrudes laterally from the sliding portion 620. In addition, the sliding portion 620 is provided with a recess 621, and is provided in a manner opposed to the power source 501. Power such as air pressure generated from the power source 501 is transmitted to the moving body 600, and the moving body 600 moves from the first end portion 511 to the second end portion 512 in the housing portion 510, which will be described in detail later.

[0070] Then, the circuit breaker device 900 is installed in the circuit to be protected for use. Specifically, the external connection terminals 910 on both sides of the circuit breaker device 900 are connected to a part of the circuit. In a normal state, the current I flowing out of the circuit flows from the inner cover 930 of the external connection terminal 910 to the outer cover 940. Because the inner cover 930 and the outer cover 940 are firmly electrically connected, the current I reliably flows from the external connection terminal 910 to the outer cover 940. In addition, because the outer cover 940 and the end 110 of the fuse element 100 are fixed, the current I flows from the outer cover 940 to the end 110 of the fuse element 100. Furthermore, the current I flows from one end 110 (right side in the figure) of the fuse element 100 to the other end 110 (left side in the figure), and flows from the other end 110 to the external connection terminal 910 via the cover 920.

[0071] Thus, in a normal state, the current I flows in the circuit via the circuit breaker 900. It should be noted that in a normal state, the power mechanism 500 does not work and the moving body 600 does not move. Therefore, the front end 611 of the protruding portion 610 of the moving body 600 does not abut against the movable portion 300 and is in a separated state. Figure 1 and Figure 2 In the figure, a total of four fuse elements 100 are connected and fixed to the movable part 300, but the present invention is not limited to this. Only one fuse element 100 may be connected and fixed to the movable part 300, or any number of more than two fuse elements 100 may be connected and fixed to the movable part 300.

[0072] Here, for example, when a relatively high abnormal current flows in the circuit, the fuse part 120 of the fuse element 100 of the circuit breaker device 900 generates heat and quickly blows, so that the circuit can be immediately disconnected. On the other hand, for example, when a relatively low abnormal current flows in the circuit, it takes time for the fuse part 120 of the fuse element 100 of the circuit breaker device 900 to generate heat and blow, and there is a possibility that the circuit cannot be immediately disconnected or the circuit cannot be disconnected because the fuse part 120 does not blow.

[0073] In this case, the external monitoring device detects that a relatively low abnormal current flows, and inputs an abnormal signal to the power source 501 of the power mechanism 500 of the circuit breaker device 900. When the abnormal signal is input from the external monitoring device, for example, the power source 501 detonates the gunpowder inside the power source 501, and the air pressure generated by the explosion instantly pushes out and moves the moving body 600 in the accommodating portion 510. It should be noted that the power source 501 is not limited to a power source using gunpowder, and other known power sources may also be used as long as it generates power for moving the moving body 600. In addition, the external monitoring device detects that a relatively low abnormal current flows, and inputs an abnormal signal to the power source 501 of the power mechanism 500 of the circuit breaker device 900, but is not limited to this. Even when a relatively high abnormal current flows in the circuit, the external monitoring device may input an abnormal signal to the power mechanism 500 of the circuit breaker 900, and in this case, after the fuse part 120 of the fuse element 100 of the circuit breaker 900 is heated and melted, the fuse element 100 is further disconnected, so that the circuit can be disconnected more reliably and more quickly. In addition, not limited to the case of detecting a relatively low abnormal current, when a specified abnormal current that is intended to be disconnected flows, the external monitoring device may also input an abnormal signal to the power mechanism 500 of the circuit breaker 900 to disconnect the fuse element 100.

[0074] Then, the gunpowder in the power source 501 explodes, and the air pressure generated by the explosion is transmitted to the recess 621 of the moving body 600. Then, as Figure 4 and Figure 5 As shown, the moving body 600 is forcefully blown from the first end 511 toward the second end 512 by air pressure, and instantly moves toward the second end 512 in the accommodation portion 510 . Figure 4 The moving body 600 is shown Figure 2 The top view of the state after the state is moved is shown. Figure 5 (a) shows the fuse element 100 from Figure 3 The state shown in (a) is a cross-sectional view of the state after being broken, Figure 5 (b) shows the moving body 600 from Figure 3 (b) is a cross-sectional view of the state after the state is moved.

[0075] like Figure 4 and Figure 5As shown in (b), when the moving body 600 moves toward the second end 512, the front end 611 of the protrusion 610 of the moving body 600 abuts against the movable part 300. Then, the movable part 300 is pressed by the moving body 600, and the movable part 300 moves laterally as a whole. Therefore, since the end 110 of the fuse element 100 is connected and fixed to the movable part 300 on both sides of the movable part 300, when the movable part 300 moves laterally, the fuse element 100 connected to the movable part 300 is pulled laterally. Then, the fuse element 100 is physically separated into a left part and a right part by the pulling force F to disconnect the overcurrent I. As a result, even when a relatively low abnormal current flows, the circuit can be immediately disconnected regardless of whether the fuse part 120 is blown. It should be noted that since the tensile force F is concentrated on the fuse portion 120 of the fuse element 100 where the width is locally narrowed, the periphery of the fuse portion 120 is disconnected. In addition, the arc generated after disconnecting the fuse element 100 is effectively extinguished by the arc extinguishing material 290.

[0076] As described above, according to the circuit breaker device 900 of the present invention, since it is configured to apply a pulling force to segment the fuse element 100 to break the circuit, it is not necessary to shear the arc extinguishing material 290 together with the fuse element 100. Therefore, compared with the case where the cut-off portion and the arc extinguishing material are cut off by a moving body in the conventional circuit breaker device, the force for cutting off the fuse element 100 can be smaller, and the power of the power mechanism for generating the pulling force can also be smaller. In particular, according to the circuit breaker device 900 of the present invention, even when a plurality of fuse elements 100 are provided, only the force for breaking the fuse element 100 is increased, and unlike the conventional circuit breaker device, the area to be sheared of the arc extinguishing material does not increase, so the power of the power mechanism for generating the pulling force can be reduced compared with the conventional circuit breaker device. As a result, according to the circuit breaker device 900 of the present invention, it is possible to suppress the increase in the power of the power source and easily break the circuit, and at the same time, it is possible to cope with the increase in the number of cut-off portions (fuse elements).

[0077] When the fuse element 100 is pulled, the end 110 of the fuse element 100 slides in the insertion hole 931 of the inner cover 930 of the external connection terminal 910, so the electrical connection between the fuse element 100 and the external connection terminal 910 is unstable. In addition, since the end 110 of the fuse element 100 is configured to be slidable in the insertion hole 931 of the inner cover 930 of the external connection terminal 910, the electrical connection between the end 110 of the fuse element 100 and the inner cover 930 of the external connection terminal 910 may be unstable even in the state before the fuse element 100 is pulled out.

[0078] However, if Figure 3As shown in (a), before the fuse element 100 is pulled, the outer cover 940 is firmly embedded in the outer side of the inner cover 930 and firmly maintains the state of electrical contact and physical contact. Figure 5 As shown in (b), even when the movable part 300 moves and the end 110 of the fuse element 100 slides, the outer cover 940 moves sideways together with the movable part 300, but the outer cover 940 and the inner cover 930 constituting the electrical connection maintaining structure are firmly embedded in each other and maintain a state of electrical and physical contact with each other. Therefore, the current I flows from the inner cover 930 of the external connection terminal 910 to the outer cover 940 until the end 110 of the fuse element 100 starts to move and the arc generated by breaking the fuse element 100 is extinguished, and then flows to the fuse element 100 connected and fixed to the outer cover 940, so that the current can flow stably in the circuit.

[0079] like Figure 2 and Figure 3 As shown in (b), in the state before the abnormal current flows and the power mechanism 500 operates, there is a gap X between the front end 611 of the moving body 600 and the movable part 300, and they are in a state of being separated from each other. Then, after the moving body 600 starts to move by the power generated by the power source 501, as shown in Figure 5 As shown in (b), the front end 611 of the moving body 600 abuts against the movable part 300 to move the movable part 300. Therefore, the moving body 600 can be accelerated by using the gap X, and at the moment when the moving body 600 abuts against the movable part 300, the moving body 600 is fully accelerated from the initial speed to near the maximum speed. Then, since the moving body 600 that has been fully accelerated can make the movable part 300 move laterally instantaneously, the fuse element 100 connected to the movable part 300 can be instantly disconnected, and the circuit can be disconnected faster. In the state before the power mechanism 500 works, the gap X exists between the front end 611 of the moving body 600 and the movable part 300, and they become a state away from each other, but the present invention is not limited to this. For example, even in the state before the power mechanism 500 works, there may be no gap X between the front end 611 of the moving body 600 and the movable part 300, and the front end 611 of the moving body 600 and the movable part 300 may contact each other. By using the moving body 600 , the power generated by the power source 501 can be efficiently transmitted to the movable part 300 , and as a result, the fuse element 100 connected to the movable part 300 can be effectively and quickly disconnected.

[0080] <Second Embodiment>

[0081] Next, we will refer to Figures 6 to 8 A circuit breaking device 900A of the present invention according to the second embodiment is described. Figure 61 is an overall perspective view showing the power mechanism 500A and the electrical connection maintaining structure of the circuit breaker device 900A in an exploded manner. Figure 7 is a top view of the circuit breaker device 900A, Figure 8 (a) is along Figure 7 A cross-sectional view taken along line CC of Figure 8 (b) is along Figure 7 In addition, the configuration of the circuit breaker device 900A according to the second embodiment is different from the configuration of the circuit breaker device 900 according to the first embodiment in that the configuration of the electrical connection maintaining structure and the movable portion 300A includes a sliding portion 310A, but the other configurations are substantially the same as the configuration of the circuit breaker device 900 according to the first embodiment, and thus the description of the same configuration is omitted.

[0082] The movable part 300A includes a plate-shaped sliding part 310A, and the protrusion 311A ​​of the sliding part 310A is engaged with the fixing hole 301A of the movable part 300A, so that the sliding part 310A is firmly connected and fixed to the movable part 300A. In addition, the sliding part 310A includes a metal conductive part 312A and an insulating part 313A, and the conductive part 312A and the insulating part 313A are connected in an adjacent state. Although the movable part 300A and the conductive part 312A of the sliding part 310A are electrically connected to each other, the movable part 300A and the insulating part 313A are electrically insulated from each other.

[0083] A pair of clamping plates 950A are fixed to the external connection terminal 910A. The clamping plates 950A are made of metal and clamp the sliding portion 310A so as to be able to slide. The clamping plates 950A are electrically connected to the conductive portion 312A of the sliding portion 310A and the external connection terminal 910A. The clamping plates 950A constitute an electrical connection maintaining structure that maintains the electrical connection between the fuse element 100A and the external connection terminal 910A.

[0084] The outer cover 940A is embedded in the outer side of the inner cover 930A, and the outer cover 940A is configured to be able to slide laterally when embedded in the outer side of the inner cover 930A. Since the outer cover 940A is made of an insulator, the inner cover 930A and the outer cover 940A are not electrically connected. Only the end 110A of the fuse element 100A protruding to the outer side of the outer cover 940A is connected and fixed to the movable part 300A, and the fuse element 100A is electrically connected to the movable part 300A.

[0085] Then, the circuit breaker device 900A is installed in the circuit to be protected for use. Specifically, the external connection terminals 910A on both sides of the circuit breaker device 900A are connected to a part of the circuit. In a normal state, the current IA flowing out of the circuit flows from the external connection terminals 910A to the clamping plate 950A. Figure 8As shown in (b). Since the clamping plate 950A is electrically connected to the conductive portion 312A of the sliding portion 310A, and the conductive portion 312A is also electrically connected to the movable portion 300A, the current IA reliably flows from the clamping plate 950A to the movable portion 300A via the conductive portion 312A. Figure 8 As shown in (a), since the movable part 300A and the end 110A of the fuse element 100A are fixed, the current IA flows from the movable part 300A to the end 110A of the fuse element 100A. In addition, the current IA flows from one end 110A of the fuse element 100A to the other end 110A, and flows from the other end 110A to the external connection terminal 910A via the cover 920A.

[0086] Thus, the current IA flows in the circuit via the circuit breaker 900A. In a normal state, the power mechanism 500A does not operate, and the moving body 600A does not move. Therefore, the front end 611A of the protruding portion 610A of the moving body 600A does not abut against the insulating portion 313A of the sliding portion 310A of the movable portion 300A, and is in a separated state.

[0087] Next, refer to Fig. 9 and Fig.10 , a case will be described where an external monitoring device detects abnormal current flow and inputs an abnormal signal to the power source 501A of the power mechanism 500A of the circuit breaking device 900A. Fig. 9 The moving object 600A is shown in FIG. Figure 7 The top view of the state after the state is moved is shown. Fig.10 (a) shows the fuse element 100A from Figure 8 The state shown in (a) is a cross-sectional view of the state after being broken, Fig.10 (b) shows that the moving body 600A has moved from Figure 8 (b) is a cross-sectional view of the state after the state is moved.

[0088] like Fig. 9 and Fig.10 As shown in (b), when the moving body 600A moves toward the second end 512A by the power of the power source 501A, the front end 611A of the protrusion 610A of the moving body 600A abuts against the sliding portion 310A of the movable part 300A. Then, the movable part 300A is pressed by the moving body 600A, and the movable part 300A moves laterally as a whole. When the movable part 300A moves laterally, the end 110A of the fuse element 100A connected to the movable part 300A is pulled laterally. Then, the fuse element 100A is physically separated into a left part and a right part by the pulling force FA to disconnect the overcurrent IA.

[0089] In addition, if Figure 8As shown, before the fuse element 100A is pulled, the clamping plate 950A firmly clamps the conductive portion 312A of the sliding portion 310A of the movable portion 300A to firmly maintain the state in which the fuse element 100A is electrically connected to the external connection terminal 910A. Figures 8 to 10 As shown, even when the movable part 300A moves and the end 110A of the fuse element 100A slides, the clamping plate 950A constituting the electrical connection maintaining structure firmly clamps the conducting portion 312A of the sliding portion 310A of the movable part 300A, and firmly maintains the state in which the fuse element 100A is electrically connected to the external connection terminal 910A. Therefore, the current IA flows from the external connection terminal 910A to the fuse element 100A via the clamping plate 950A and the movable part 300A, and can flow reliably and stably in the circuit until the end 110A of the fuse element 100A starts to move and the arc generated by breaking the fuse element 100A is extinguished.

[0090] In addition, if Fig.10 As shown in (b), after the fuse element 100 is disconnected, the insulating portion 313A of the sliding portion 310A replaces the conducting portion 312A and is positioned and clamped between the clamping plates 950A. Therefore, since the overcurrent IA (fault current) flowing out from the external connection terminal 910A and the clamping plate 950A is disconnected by the insulating portion 313A, the arc generated immediately after the fuse element 100 is cut off can be quickly extinguished. It should be noted that the sliding portion 310A has the conducting portion 312A and the insulating portion 313A, but the present invention is not limited to this, and the sliding portion 310A may not have the insulating portion 313A and may be completely formed by the conducting portion 312A.

[0091] <Third Embodiment>

[0092] Next, we will refer to Figures 11 to 13 A circuit breaker device 900B according to the invention of the present application according to the third embodiment is described. It should be noted that Fig.11 1 is an exploded perspective view showing the entire circuit breaker device 900B. Fig.12 is a top view of the circuit breaker device 900B in an assembled state, Fig.13 (a) is along Fig.12 A cross-sectional view taken along line EE of Fig.13 (b) is along Fig.12In addition, the configuration of the circuit breaker device 900B according to the third embodiment is different from the configuration of the circuit breaker device 900 according to the first embodiment in that the configuration of the electrical connection maintaining structure is different, and the accommodating portion 200B and the power mechanism 500B are integrated, however, the other configurations are substantially the same as those of the circuit breaker device 900 according to the first embodiment, and therefore, the description of the same configuration will be omitted.

[0093] like Fig.11 As shown, the circuit breaker device 900B includes a lower housing 980B and an upper housing 990B, and can be assembled in a state where the fuse element 100B and the moving body 600B are accommodated inside by overlapping and fixing the lower housing 980B and the upper housing 990B up and down. Specifically, the fuse element 100B is accommodated in the accommodating portion 200B surrounded by the lower housing 980B and the upper housing 990B up and down. In addition, in the power mechanism 500B, the power source 501B is fixed to the first end 511B side, and the moving body 600B is accommodated inside the accommodating portion 510B surrounded by the lower housing 980B and the upper housing 990B up and down. As described above, in the circuit breaker device 900B, the accommodating portion 200B and the power mechanism 500B can be installed in an integrated state by overlapping the lower housing 980B and the upper housing 990B up and down, so that the circuit breaker device 900B can be easily assembled.

[0094] One external connection terminal 910B (left side in the figure) includes a connection plate 911B extending upward from the external connection terminal 910B and is electrically connected to the connection plate 911B. The connection plate 911B of one external connection terminal 910B is electrically and physically fixed to one end 110B of the fuse element 100B.

[0095] The other external connection terminal 910B (right side in the figure) includes a metal conductor portion 970B. The conductor portion 970B includes a base end portion 971B fixed to the external connection terminal 910B, a curved plastic deformation portion 972B, and a front end portion 973B connected and fixed to the movable portion 300B. In addition, the external connection terminal 910B is electrically connected to the conductor portion 970B, and the conductor portion 970B is also electrically connected to the movable portion 300B. In addition, the movable portion 300B is electrically and physically connected and fixed to the other end portion 110B of the fuse element 100B.

[0096] As will be described later, the plastic deformation portion 972B of the conductor portion 970B becomes a portion that is plastically deformable when the movable portion 300B slides laterally. Therefore, the conductor portion 970B constitutes an electrical connection maintaining structure that maintains the electrical connection between the fuse element 100B and the external connection terminal 910B. It should be noted that since the conductor portion 970B does not return to its original shape after plastic deformation, the movable portion 300B connected to the conductor portion 970B does not return to its original position before sliding.

[0097] In addition, the circuit breaker device 900B is attached to the circuit to be protected for use. Specifically, the external connection terminals 910B on both sides of the circuit breaker device 900B are connected to a part of the circuit. Fig.13 As shown in (b), the current IB flowing out of the circuit flows from the external connection terminal 910B to the conductor portion 970B. Since the conductor portion 970B is electrically connected to the movable portion 300B, the current IB reliably flows from the external connection terminal 910B to the movable portion 300B via the conductor portion 970B. Fig.13 As shown in (a), since the movable part 300B and the end 110B of the fuse element 100B are fixed, the current IB flows from the movable part 300B to the end 110B of the fuse element 100B. Then, the current IB flows from one end 110B of the fuse element 100B to the other end 110B, and from the other end 110B to the external connection terminal 910B via the connection plate 911B.

[0098] In this way, the current IB flows in the circuit via the circuit breaker device 900B. It should be noted that in a normal state, the power mechanism 500B does not work and the moving body 600B does not move. Therefore, the front end 611B of the protruding portion 610B of the moving body 600B does not abut against the movable portion 300B and is in a separated state.

[0099] Next, refer to Fig.14 and Fig.15 , a case will be described where an external monitoring device detects that an abnormal current is flowing and inputs an abnormal signal to the power source 501B of the power mechanism 500B of the circuit breaker device 900B. Fig.14 The moving body 600B is shown as Fig.12 The top view of the state after the state is moved is shown. Fig.15 (a) shows the fuse element 100B from Fig.13 The state shown in (a) is a cross-sectional view of the state after being broken, Fig.15 (b) shows that the moving body 600B is Fig.13 (b) is a cross-sectional view of the state after the state is moved.

[0100] like Fig.14 and Fig.15 As shown in (b), when the moving body 600B moves toward the second end 512B, the front end 611B of the protruding portion 610B of the moving body 600B abuts against the movable portion 300B. Then, the movable portion 300B is pressed by the moving body 600B, and the movable portion 300B moves laterally as a whole. When the movable portion 300B moves laterally, the end 110B of the fuse element 100B connected to the movable portion 300B is pulled laterally. Then, the fuse element 100B is physically separated into a left part and a right part by the pulling force FB to disconnect the overcurrent IB.

[0101] In addition, if Figures 13 to 15 As shown, when the movable part 300B moves and the end 110B of the fuse element 100B slides, the conductor part 970B constituting the electrical connection maintaining structure is plastically deformed, and the conductor part 970B maintains a state of being electrically and physically connected to the movable part 300B and the external connection terminal 910B. Therefore, the current IB flows from the external connection terminal 910B to the fuse element 100B via the conductor part 970B and the movable part 300B, and can flow stably in the circuit until the end 110B of the fuse element 100B begins to move and the arc generated by breaking the fuse element 100B is extinguished. It should be noted that the conductor part 970B is plastically deformable, but the present invention is not limited to this. For example, the conductor part 970B can be made of any material as long as the conductor part 970B can be deformed so that when the movable part 300B moves, the electrical connection between the external connection terminal 910B and the movable part 300B can be maintained.

[0102] <Fourth Embodiment>

[0103] Next, we will refer to Fig.16 and Fig.17 A circuit breaker device 900C of the present invention according to a fourth embodiment will be described. Fig.16 is a top view of the circuit breaker device 900C, Fig.17 This is an overall three-dimensional diagram of the electromagnetic coil type tripping device 800C of the power mechanism 500C. Fig.18 1 is a plan view showing an enlarged view of a power mechanism 500C and a moving body 600C of a circuit breaking device 900C. In addition, the configuration of the circuit breaking device 900C according to the fourth embodiment is different from the configuration of the circuit breaking device 900B according to the third embodiment in terms of the configuration of the power mechanism 500C and the moving body 600C, but the other configurations are substantially the same as the configuration of the circuit breaking device 900B according to the third embodiment, and thus the description of the same configurations is omitted.

[0104] The power mechanism 500C according to the fourth embodiment includes an electromagnetic coil type tripping device 800C and a compression spring 540C, instead of the power source 501B of the power mechanism 500B described in the third embodiment. The electromagnetic coil type tripping device 800C uses the existing principle used in the prior art, and the configuration of the electromagnetic coil type tripping device 800C will be described in detail. Specifically, as shown in FIG. Fig.17 As shown, the electromagnetic coil type tripping device 800C includes a fixed iron core 810C, a coil 820C wound around the fixed iron core 810C, and a working iron sheet 830C. Fig.16 As shown, one end 821C of the coil 820C is electrically connected to one external connection terminal 910C. The other end 822C of the coil 820C is electrically connected to the movable part 300C via a connector 960C.

[0105] like Fig.17 and Fig.18 As shown, the working iron piece 830C is pivotally supported by the base 801C via the rotating shaft 831C, and the working iron piece 830C can rotate around the rotating shaft 831C. In addition, since the end 832C of the working iron piece 830C is pulled by the tension spring 802C fixed to the base 801C, the front end 833C on the opposite side of the end 832C is away from the head 461C of the shaft 460C.

[0106] The shaft 460C is coupled to the head 660C of the moving body 600C, and the shaft 460C is inserted through the through hole 551C of the first partition wall 550C and the through hole 561C of the second partition wall 560C of the accommodating portion 510C. In addition, the compression spring 540C is embedded in the outer periphery of the shaft 460C, and the compression spring 540C is sandwiched and compressed between the first partition wall 550C and the head 660C of the moving body 600C. Therefore, the force applied toward the second end 512C acts on the moving body 600C through the compression spring 540C.

[0107] The head 461C of the shaft 460C is locked to the fixing plate 480C, and the fixing plate 480C is fixed to the second partition wall 560C of the accommodating portion 510C. Specifically, the fixing plate 480C is provided with a locking hole 481C narrower than the width of the head 461C and an insertion hole 482C wider than the width of the head 461C. The locking hole 481C and the insertion hole 482C are continuous, and as will be described later, the state in which the head 461C is locked to the periphery of the locking hole 481C can be changed to a state in which the head 461C moves to the insertion hole 482C and the head 461C is separated from the insertion hole 482C downward.

[0108] In a normal state, the electromagnetic coil type trip device 800C of the power mechanism 500C does not work. Therefore, the applied force toward the second end 512C acts on the moving body 600C through the compression spring 540C, but the head 461C of the shaft 460C fixed to the moving body 600C is engaged with the fixed plate 480C, so the moving body 600C does not move toward the second end 512C. It should be noted that the front end 611C of the protruding portion 610C of the moving body 600C does not abut against the movable portion 300C and is in a separated state.

[0109] Next, we will refer to Fig.18 and Fig.19 The state in which the circuit breaker device 900C disconnects the circuit when an abnormality such as an overcurrent flowing through the circuit occurs is described. It should be noted that Fig.19 It is a mobile body 600C from Fig.16 The state shown is a top view after movement.

[0110] The overcurrent flowing from the circuit to the external connection terminal 910C flows from the conductor part 970C to the movable part 300C. Then, part of the overcurrent flows from the movable part 300C to the coil 820C via the connector 960C. When the overcurrent flowing through the coil 820C exceeds the predetermined threshold value, the working iron piece 830C is attracted to the fixed iron core 810C by the magnetic field generated in the fixed iron core 810C. Because the adsorption force at this time is greater than the tension of the tension spring 802C, the working iron piece 830C rotates toward the fixed iron core 810C with the rotating shaft 831C as the center. Then, the front end 833C of the working iron piece 830C abuts against the head 461C of the shaft 460C, and moves the head 461C from the locking hole 481C to the insertion hole 482C.

[0111] When the head 461C of the shaft 460C is pulled out from the insertion hole 482C toward the through hole 561C, the engagement between the shaft 460C and the fixing plate 480C is released. Fig.19 As shown, the force applied toward the second end portion 512C acts on the moving body 600C through the compression spring 540C, so that the moving body 600C moves toward the second end portion 512C.

[0112] When the moving body 600C moves toward the second end 512C, the front end 611C of the protrusion 610C of the moving body 600C abuts against the movable part 300C. Then, the movable part 300C is pressed by the moving body 600C, and the movable part 300C moves laterally as a whole. When the movable part 300C moves laterally, the end 110C of the fuse element 100C connected to the movable part 300C is pulled laterally. Then, the fuse element 100C is physically separated into a left part and a right part by the pulling force FC to disconnect the overcurrent. When the movable part 300C moves laterally, the connector 960C connected to the coil 820C is detached from the movable part 300C, and the coil 820C and the movable part 300C are not electrically connected.

[0113] As described above, according to the circuit breaker device 900C of the invention of the present application, it is not necessary to shear the arc extinguishing material 290C together with the fuse element 100C, because the fuse element 100C is disconnected by applying a pulling force to disconnect the circuit. Therefore, compared with the case where the disconnected portion and the arc extinguishing material are disconnected by a moving body in the existing circuit breaker device, the force for disconnecting the fuse element 100C can be smaller, and the power of the power mechanism for generating the pulling force can also be smaller. In particular, according to the circuit breaker device 900C of the present invention, even when a plurality of fuse elements 100C are provided, only the force for disconnecting the fuse element 100C increases, and unlike the existing circuit breaker device, the area to be sheared of the arc extinguishing material does not increase, so the power of the power mechanism for generating the pulling force can be reduced compared with the existing circuit breaker device. As a result, according to the circuit breaker device 900C of the present invention, it is possible to suppress the increase in the power of the power source and easily disconnect the circuit, while being able to cope with the increase in the number of disconnected portions (fuse elements).

[0114] <Fifth Embodiment>

[0115] Next, we will refer to Fig. 20 and Fig.21 A circuit breaking device 900D of the invention of the present application according to the fifth embodiment is described. Fig. 20 This is an overall three-dimensional diagram of the circuit breaker device 900D. Fig.21 It is along Fig. 20 In addition, the configuration of the circuit breaker device 900D according to the fifth embodiment is different from the configuration of the circuit breaker device 900 according to the first embodiment in that a fastening portion 700D is provided and the shapes of the power mechanism 500D and the moving body 600D are different, but the other configurations are basically the same as the configuration of the circuit breaker device 900 according to the first embodiment, so the description of the same configuration is omitted.

[0116] The power mechanism 500D has the same basic configuration as the power mechanism 500 of the circuit breaking device 900 according to the first embodiment, but is different in shape from the power mechanism 500 according to the first embodiment. Specifically, the power mechanism 500D is a substantially rectangular parallelepiped formed of an insulator such as a synthetic resin, and includes a housing portion 510D capable of housing the moving body 600D inside, and a power source 501D is provided at a first end portion 511D of the housing portion 510D. In addition, an insertion hole 502D is provided at a second end portion 512D of the housing portion 510D, and a protrusion 610D of the moving body 600D is inserted. Furthermore, an insertion hole 503D is provided at a second end portion 512D of the housing portion 510D, and a fastening portion 700D is inserted. The sliding portion 620D of the moving body 600D has a large lateral width, and when the moving body 600D moves toward the second end portion 512D, the sliding portion 620D can abut against the fastening portion 700D to move the fastening portion 700D.

[0117] The fastening portion 700D is a long rod-shaped body formed of an insulator such as a synthetic resin, is accommodated in the accommodation portion 200D, and is disposed adjacent to the fuse element 100D. Fig.21 As shown, the base end portion 710D of the fastening portion 700D passes through the insertion hole 921D of the cover 920 and extends to the power mechanism 500D. In addition, the base end portion 710D passes through the insertion hole 503D of the power mechanism 500D and protrudes into the accommodating portion 510D. On the other hand, the front end portion 720D of the fastening portion 700D is adjacent to the periphery of the fuse portion 120D of the fuse element 100D. Since the fuse element 100D has a narrow width around the fuse portion 120D, when the fuse element 100D is pulled, the periphery of the fuse portion 120D becomes the part where the fuse element 100D is disconnected, as described below.

[0118] It should be noted that, in a normal state, the power mechanism 500D does not work, and the moving body 600D does not move. Therefore, the front end 611D of the protruding portion 610D of the moving body 600D does not abut against the movable portion 300D, and is separated by a distance L1. In addition, the sliding portion 620D of the moving body 600D does not abut against the base end portion 710D of the fastening portion 700D, and is separated by a distance L2.

[0119] Next, refer to Fig. 22 and Fig.23 , a case where an external monitoring device detects abnormal current flow and inputs an abnormal signal to the power source 501D of the power mechanism 500D of the circuit breaker device 900D will be described. It should be noted that Fig. 22 The moving object 600D is shown Fig.21 The top view of the state after the state is moved is shown. Fig.23 The moving object 600D is shown Fig. 22The state shown is a top view of a state further moved.

[0120] like Fig. 22 As shown, when the moving body 600D moves toward the second end 512D, the front end 611D of the protruding portion 610D of the moving body 600D abuts against the movable portion 300D. Then, the movable portion 300D is pressed by the moving body 600D, and the movable portion 300D moves laterally as a whole. When the movable portion 300D moves laterally, the end 110D of the fuse element 100D connected to the movable portion 300D is pulled laterally. Then, the fuse element 100D is physically separated into a left part and a right part by the pulling force FD to disconnect the overcurrent. The fuse element 100D has a locally narrow width near the fuse portion 120D, and becomes a disconnection portion 190D that is disconnected by the pulling force FD.

[0121] In addition, if Fig.21 As shown, the accommodating portion 200D is filled with arc extinguishing material 290D, and the periphery of the fuse portion 120D before being disconnected is firmly filled with arc extinguishing material 290D. Fig. 22 As shown in FIG. 1 , when the periphery of the fuse portion 120D is disconnected, a cavity not filled with the arc extinguishing material 290D is formed in the periphery of the disconnection portion 190D. Fig. 22 In the illustrated state, the sliding portion 620D of the moving body 600D does not abut against the base end portion 710D of the fastening portion 700D, and the fastening portion 700D does not move.

[0122] Next, if Fig.23 As shown, when the moving body 600D moves further toward the second end 512D, the sliding portion 620D of the moving body 600D abuts against the base end portion 710D of the fastening portion 700D. Then, the fastening portion 700D is pushed and moved by the sliding portion 620D, and the front end portion 720D of the fastening portion 700D moves so as to be pushed toward the periphery of the disconnecting portion 190D. Therefore, the arc extinguishing material 290D around the front end portion 720D of the fastening portion 700D is pushed out to fill the cavity around the disconnecting portion 190D, and the arc extinguishing material 290D is fastened around the disconnecting portion 190D again. As a result, when the fuse element 100D is disconnected to disconnect the overcurrent, the arc generated around the disconnecting portion 190D can be efficiently extinguished by the arc extinguishing material 290D that is fastened again.

[0123] It should be pointed out that by adjusting Fig.21The distance L1 and the distance L2 shown can appropriately change the moving timing and moving distance of the fastening part 700D. Thus, the timing, force and amount for fastening the arc extinguishing material 290D around the disconnecting part 190D can be adjusted, so that the arc can be extinguished more efficiently. In addition, although the power source 501D is used as the power for moving the moving body 600D, the present invention is not limited thereto, and the power mechanism 500D may include the electromagnetic coil type trip device 800C and the compression spring 540C described in the fourth embodiment instead of the power source 501D.

[0124] <Sixth Implementation Method>

[0125] Next, we will refer to Fig.24 (a) describes a fuse element 100E of a circuit breaking device 900E of the invention of the present application according to the sixth embodiment. Fig.24 (a) is a side view of the fuse element 100E. In addition, the configuration of the circuit breaker device 900E according to the sixth embodiment is different from the configuration of the circuit breaker device 900 according to the first embodiment in terms of the configuration of the fuse element 100E, but the other configurations are basically the same as the configuration of the circuit breaker device 900 according to the first embodiment, so the description of the same configuration is omitted.

[0126] like Fig.24 As shown in (a), the fuse element 100E does not include the fuse part 120 of the fuse element 100 according to the first embodiment. By not including the fuse part 120, the resistance of the fuse element 100E can be reduced, and the power loss can be suppressed to a low level. Specifically, the fuse element 100E is formed by a thin sheet of metal plate composed of a metal conductor such as copper, and includes end portions 110E on both sides. In addition, unlike the fuse element 100 according to the first embodiment, the fuse element 100E does not have a function of disconnecting the overcurrent by melting the fuse part 120 when the overcurrent flows, however, when the abnormal current flows, the movable part 300E moves laterally, and the end portion 110E connected to the movable part 300E is pulled laterally, so that the fuse element 100E can be disconnected at any position to disconnect the overcurrent. Furthermore, the notch 101E can be provided at any position of the fuse element 100E to form a narrow portion 102E that is more susceptible to external forces than other portions. By providing the narrow portion 102E, the force when the end 110E is pulled sideways can be concentrated in the narrow portion 102E and disconnected, so that the disconnection position can be limited to a specific position of the design. This makes it possible to efficiently extinguish the arc generated during disconnection.

[0127] <Seventh Embodiment>

[0128] Next, we will refer to Fig.24(b) describes a fuse element 100F of a circuit breaker device 900F of the present invention according to the seventh embodiment. It should be noted that, Fig.24 (b) is a side view of the fuse element 100F. In addition, the configuration of the circuit breaker device 900F according to the seventh embodiment is different from the configuration of the circuit breaker device 900 according to the first embodiment in terms of the configuration of the fuse element 100F, but the other configurations are basically the same as the configuration of the circuit breaker device 900 according to the first embodiment, so the description of the same configuration is omitted.

[0129] like Fig.24 As shown in (b), the fuse element 100F is formed of a sheet of thin metal plate made of a metal conductor such as copper, and includes end portions 110F on both sides, a plurality of narrow portions (fusing portions) 120F located between the end portions 110F, and tension assisting portions 150F on both sides of the central narrow portion 120F. The narrow portion 120F is formed by having a plurality of small holes 121F in a portion of the fuse element 100F, and these small holes 121F have a narrowed width to generate heat and fuse when an unexpected overcurrent flows in a circuit, etc., thereby disconnecting the overcurrent. In addition, the front end 151F of the tension assisting portion 150F is connected to be adjacent to the central narrow portion 120F. The end 152F of one tension assisting portion 150F is fixed to a portion of the accommodating portion 200F that accommodates the fuse element 100F, and the end 152F of the other tension assisting portion 150F is fixed to the movable portion 300F.

[0130] Then, when an abnormal current flows, the movable part 300F moves laterally, and the end 110F connected to the movable part 300F is pulled laterally, so that the vicinity of the narrow part 120F at the center of the fuse element 100F is disconnected, and the overcurrent can be disconnected. At this time, since the central narrow part 120F is pulled to both sides by the tension auxiliary parts 150F on both sides, the tension can be concentrated on the central narrow part 120F instead of other narrow parts 120F, and the central narrow part 120F can be preferentially disconnected. Thus, the central narrow part 120F can be defined as the designed disconnection part, and the arc generated at the time of disconnection can be efficiently extinguished. It should be noted that although the central narrow part 120F is defined as the disconnection part, the present invention is not limited thereto, and when the tension auxiliary part 150F is set at any position on both sides of the narrow part 120F, the narrow part 120F at any position can be defined as the disconnection part.

[0131] <Eighth Implementation Method>

[0132] Next, we will refer to Fig.24 (c) describes a fuse element 100G of a circuit breaking device 900G of the invention of the present application according to the eighth embodiment. Fig.24 (c) is a side view of the fuse element 100G. In addition, the configuration of the circuit breaker device 900G according to the eighth embodiment is different from the configuration of the circuit breaker device 900 according to the first embodiment in terms of the configuration of the fuse element 100G, but the other configurations are substantially the same as the configuration of the circuit breaker device 900 according to the first embodiment, so the description of the same configuration is omitted.

[0133] like Fig.24 As shown in (c), the fuse element 100G is formed of a thin sheet of metal made of a metal conductor such as copper, and includes end portions 110G on both sides and a plurality of narrow portions (fusing portions) 120G located between the end portions 110G. The narrow portion 120G is formed by opening a plurality of small holes 121G in a portion of the fuse element 100G, and these small holes 121G have a narrowed width, so that when an unexpected overcurrent flows in a circuit, etc., heat is generated and melted, thereby disconnecting the overcurrent. In addition, a tension auxiliary portion 150G is attached to both sides of the central narrow portion 120G. The tension auxiliary portion 150G is an inorganic rope-shaped body, and the front end 151G of the tension auxiliary portion 150G is connected to the adjacent central narrow portion 120G. The end 152G of one tension auxiliary portion 150G is fixed to a portion of the accommodating portion 200G accommodating the fuse element 100G, and the end 152G of the other tension auxiliary portion 150G is fixed to the movable portion 300G. In addition, the tension auxiliary portion 150G is in a stretched state so as not to bend, and is made of a material that does not stretch when the fuse element 100G is pulled.

[0134] Then, when an abnormal current flows, the movable part 300G moves laterally, and the end 110G connected to the movable part 300G is pulled laterally, so that the vicinity of the central narrow part 120G of the fuse element 100G is disconnected, and the overcurrent can be disconnected. At this time, since the central narrow part 120G is pulled to both sides by the tension auxiliary parts 150G on both sides, the tension can be concentrated in the central narrow part 120G instead of other narrow parts 120G, and is preferentially disconnected. Thus, the central narrow part 120G can be defined as the designed disconnection part, and the arc generated during disconnection can be efficiently extinguished. It should be pointed out that although the central narrow part 120G is defined as the disconnection part, the present invention is not limited to this. When the tension auxiliary parts 150G are set on both sides of the narrow part 120G, the narrow part 120G at any position can be defined as the disconnection part. Furthermore, the tension assisting portion 150G is not limited to an inorganic string-like body, and may be set to any shape made of any material as long as both sides of the narrow portion 120G at any position can be stretched.

[0135] <Ninth Embodiment>

[0136] Next, we will refer to Fig.25 and Fig.26 A circuit breaking device 900H of the present invention according to a ninth embodiment is described. Fig.25 is a top view of the circuit breaker device 900H. Fig.26 The moving body 600H is shown Fig.25 The top view of the state after the state shown is moved. In addition, the configuration of the circuit breaking device 900H according to the ninth embodiment is different from the configuration of the circuit breaking device 900B according to the third embodiment in the configuration of the conductor part 970H constituting the electrical connection maintaining structure and the configuration of the movable part 300H. However, the other configurations are basically the same as the configuration of the circuit breaking device 900B according to the third embodiment, and therefore, the description of the same configurations is omitted.

[0137] like Fig.25 As shown, the base end portion 971H of the metal conductor portion 970H composed of an electric wire is connected to another external connection terminal 910H (right side in the figure), and the front end portion 973H is electrically and physically connected and fixed to the end portion 110H of the fuse element 100H. In addition, the movable portion 300H is physically connected to the end portion 110H of each fuse element 100H, but the movable portion 300H is not electrically connected to the end portion 110H of each fuse element 100H because the movable portion 300H is made of an insulator such as resin.

[0138] As will be described later, the conductor portion 970H formed of an electric wire can be deformed in a curved manner when the movable portion 300H slides laterally. Therefore, the conductor portion 970H constitutes an electrical connection maintaining structure that maintains electrical connection between the fuse element 100H and the external connection terminal 910H.

[0139] Next, refer to Fig.26 , a case will be described in which an external monitoring device detects abnormal current flow and inputs an abnormal signal to the power source 501H of the power mechanism 500H of the circuit breaking device 900H.

[0140] like Fig.26 As shown, when the moving body 600H moves toward the second end 512H, the front end 611H of the protruding portion 610H of the moving body 600H abuts against the movable portion 300H. Then, the movable portion 300H is pressed by the moving body 600H, and the movable portion 300H moves laterally as a whole. When the movable portion 300H moves laterally, the end 110H of the fuse element 100H connected to the movable portion 300H is pulled laterally. Then, the fuse element 100H is physically separated into a left part and a right part by the pulling force FH to disconnect the overcurrent.

[0141] Furthermore, when the movable portion 300H moves and the end portion 110H of the fuse element 100H slides, the conductor portion 970H constituting the electrical connection maintaining structure bends, but the conductor portion 970H maintains a state of being electrically and physically connected to the end portion 110H of the fuse element 100H and the external connection terminal 910H. Therefore, the current flows from the external connection terminal 910H to the fuse element 100H via the conductor portion 970H, and can flow stably in the circuit until the end portion 110H of the fuse element 100H starts to move and the arc generated by breaking the fuse element 100H is extinguished.

[0142] The movable part 300H is made of an insulator such as a resin, but the present invention is not limited thereto, and it can be made of a conductor such as a metal. Because no matter whether the movable part 300H is an insulator or a conductor, the end 110H of each fuse element 100H can be pulled simultaneously with an equal pulling force, so each fuse element 100H can be efficiently disconnected. In addition, the conductor part 970H is composed of an electric wire that can be deformed in a bending manner, but the present invention is not limited thereto, as long as the conductor part 970H can be deformed so that the electrical connection between the external connection terminal 910H and the end 110H of the fuse element 100H can be maintained until the end 110H of the fuse element 100H is pulled and disconnected, the conductor part 970H can have any form, such as a bus bar with flexibility.

[0143] Furthermore, the circuit breaking device of the present invention is not limited to the above-described embodiments, and various modifications and combinations are possible within the scope described in the claims and the scope of the embodiments, and these modifications and combinations are also included in the scope of the rights.

Claims

1. A circuit breaker device, characterized in that: The invention comprises a housing portion, external connection terminals on both sides, a fuse element and an arc extinguishing material housed in the housing portion, The circuit breaker device comprises: a power mechanism configured to apply a pulling force to an end of the fuse element to disconnect the fuse element; and An electrical connection maintaining structure maintains the electrical connection between the fuse element and the external connection terminal until the fuse element is disconnected.

2. The circuit breaker device according to claim 1, characterized in that: The circuit breaker device includes a movable portion connected to an end of the fuse element. The movable part is moved by a power mechanism, The moved movable portion applies a pulling force to the end of the fuse element, thereby disconnecting the fuse element.

3. The circuit breaker device according to claim 2, characterized in that: The power mechanism includes a power source and a moving body that moves by power generated by the power source. The moving body moves the movable portion.

4. The circuit breaker device according to claim 3, characterized in that: Before the moving body moves, the moving body is separated from the movable part, After the moving body starts to move, the moving body comes into contact with the movable portion, and the movable portion moves.

5. The circuit breaker device according to any one of claims 2 to 4, characterized in that: The electrical connection maintaining structure comprises opposing clamping plates, The movable portion includes a sliding portion capable of moving between the clamping plates while being sandwiched by the clamping plates from both sides and electrically connected.

6. The circuit breaker device according to claim 5, characterized in that: The sliding portion includes a conductive portion that can be electrically connected to the clamping plate and an insulating portion adjacent to the conductive portion. Before the movable part moves, the conductive part is located between the clamping plates, and after the movable part moves, the insulating part is located between the clamping plates.

7. The circuit breaker device according to any one of claims 2 to 4, characterized in that: The electrical connection maintaining structure is composed of a conductor capable of plastic deformation, The conductor is connected to the external connection terminal and the movable portion.

8. The circuit breaker device according to any one of claims 1 to 4, characterized in that: A fastening portion for fastening the arc extinguishing material is accommodated in the accommodation portion, The fastening portion is moved toward the periphery of the disconnecting portion of the fuse element by the power mechanism to fasten the arc extinguishing material.

9. The circuit breaker device according to any one of claims 1 to 4, characterized in that: The fuse element has a narrow portion, The fuse element includes a tension assisting portion configured to concentrate the tension on the narrow portion to break the narrow portion.

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