Temperature fuse for high voltage DC current

Abstract

A high-voltage DC thermal fuse is disposed between the contact portion of a fixed terminal and the contact portion of a movable terminal, and includes a small contact forming member having a plurality of small contacts formed on the contact portion facing the contact portion of the terminal requiring contact formation. When the movable terminal enters the direction of the fixed terminal, the small contact forming member makes divided contact with the contact portion of the facing terminal through the small contacts formed on the contact portion, thereby energizing the contact portion of the fixed terminal and the contact portion of the movable terminal through the divided small contacts, and when the movable terminal moves in the opposite direction of the fixed terminal, it is configured to disconnect the contact portion of the fixed terminal and the contact portion of the movable terminal by individually disconnecting the small contacts in contact with the contact portion.

Description

Technology Field

[0001] The present invention relates to a thermal fuse for high-voltage direct current, and more specifically, to a thermal fuse for high-voltage direct current that is placed on a circuit to which high-voltage direct current is applied and disconnects the circuit when the surrounding part overheats abnormally, thereby preventing damage to the circuit caused by the high-voltage direct current. Background Technology

[0002] As is well known, thermal fuses, also known as thermal links, are typically installed in electronic devices that tend to generate heat.

[0003] When the above device malfunctions, generates heat, or exceeds an abnormal temperature, the temperature fuse automatically melts to cut off the power supply to protect the electronic device from fire.

[0004] Recently, the aforementioned temperature fuse is installed in most home appliances whose primary function is heating, such as electric rice cookers, electric irons, and electric heaters.

[0005] When internal parts fail to operate, the power supply can be shut off in time by a thermal fuse that prevents further serious damage to the device, thereby avoiding becoming a source of fire. The thermal fuse is the same as a well-known fuse.

[0006] It is typically just a power supply path within a circuit. This has no effect on the circuit as long as the current does not exceed the rated value.

[0007] It has low resistance, small power loss, and low surface temperature during normal operation. It only cuts off the power supply circuit if the electronic device generates an abnormal temperature due to a malfunction.

[0008] The above temperature fuse serves as overheat protection within the power supply circuit when the temperature range reaches the melting temperature of the fusible alloy wire inside the temperature fuse at the temperature fuse location.

[0009] By means of a melting agent, the fusible alloy wire shrinks toward the leads at both ends to prevent further damage to other elements of the circuit due to abnormal temperatures.

[0010] Therefore, the above temperature fuse is applied to many circuits that require overheating prevention. Different circuits have different temperature fuses.

[0011] Recently, electric and electronic devices that apply high-voltage direct current, such as electric vehicles, are rapidly becoming widespread. Since these devices are configured to operate various electrical and electronic components, such as heaters, through high-voltage direct current, the role of thermal fuses in electrical safety is very important.

[0012] For example, if a high-voltage direct current is continuously applied to the electrical and electronic components while the surrounding area is overheated, electrical damage to the electrical and electronic components may occur, and if exacerbated, safety accidents such as fire may occur.

[0013] However, in a conventional thermal fuse in which a fusible alloy wire is placed between a simply spaced input lead and a first lead, when AC current or low-voltage DC current is passed, the fusible alloy wire formed between the spaced fixed terminals is disconnected due to overheating of the surrounding area, so the corresponding current flowing along the fusible alloy wire is no longer applied to the circuit, thereby ensuring the electrical safety of the circuit in the event of abnormal overheating of the surrounding area.

[0014] However, in the case of the above high-voltage DC current of 100V or higher, a phenomenon occurs in which the fusible alloy wire formed between the fixed terminals explodes due to overheating of the surrounding area, generating flames or fragments and breaking the wire, and

[0015] In particular, even after the soluble alloy wire melts and breaks, a phenomenon occurs in which a high-voltage DC current of 100V or more discharges in the form of an arc between the broken lead terminals and conducts current.

[0016] That is, in a DC circuit with a voltage level of 100V or higher, during the melting process of the fusible alloy wire of a conventional temperature fuse, the shrinkage speed of the molten alloy wire is slow, the gap between the two leads is very short, and an arc is generated, resulting in the circuit not being able to be cut off in time. The circuit may be removed due to the generation of an arc along with high-temperature combustion.

[0017] Therefore, existing temperature fuses used in DC circuits with a voltage level of 100V or higher not only fail to interrupt the protection circuit in time but also cause unnecessary problems.

[0018] Furthermore, it was confirmed that the high-voltage direct current flowing in the form of an arc discharge between the aforementioned disconnected fixed terminals continuously causes electrical damage not only to the fuse itself but also to the circuit and electronic / electrical components.

[0019] Therefore, in this field, there is an urgent need for the development and dissemination of a new type of thermal fuse capable of safely shielding not only low-voltage but also high-voltage direct currents through the heating of the periphery. Prior art literature

[0020] (Patent Document 0001) KR 10-1825866 B1(Patent Document 0002) KR 10-1116087 B1(Patent Document 0003) US 04948828 A(Patent Document 0004) US 04952900 A(Patent Document 0005) CN 2513223 Y The problem to be solved

[0021] The objective of the present invention, devised to resolve the above-mentioned problem, is to configure the fixed terminal and the movable terminal to conduct electricity through small contacts with narrow contact areas so that a sufficient current conduction area is secured between the fixed terminal and the movable terminal, and

[0022] In particular, the invention provides a high-voltage DC thermal fuse that minimizes the occurrence of a large-scale arc during the disconnection process of the contact area due to abnormal overheating of the surrounding area, thereby suppressing flame explosions caused by large-scale arc discharge and preventing the phenomenon in which high-voltage DC current is conducted in the form of an arc discharge between the disconnected fixed terminal and the movable terminal. means of solving the problem

[0023] The above objective is achieved by the following configuration provided in the present invention.

[0024] The temperature fuse for high-voltage direct current according to the present invention is,

[0025] A fixed terminal connected to the first lead and having a contact portion formed therein;

[0026] A movable terminal that is connected to and energized by a second lead, normally moves toward the fixed terminal, and advances toward the opposite direction of the fixed terminal when the surrounding area is abnormally heated, and has a contact portion formed therein; and

[0027] It is configured to include a small contact forming member disposed between the contact portion of the fixed terminal and the contact portion of the movable terminal, wherein a plurality of small contacts are formed on the contact portion facing the contact portion of the terminal requiring contact formation.

[0028] The above small contact forming member makes divided contact with the contact portion of the opposing terminal through small contacts formed in the contact portion of the contact portion when the movable terminal enters in the direction of the fixed terminal, and conducts current between the contact portion of the fixed terminal and the contact portion of the movable terminal through the divided small contacts.

[0029] It is characterized by being configured such that when the above-mentioned movable terminal moves in the opposite direction of the fixed terminal, the contact portion of the fixed terminal and the contact portion of the movable terminal are disconnected through the individual disconnection of small contacts in contact with the above-mentioned contact portion.

[0030] Specific embodiments include,

[0031] The device is characterized by comprising: a conductive case having a receiving space with one side open, formed by a cylinder body of a conductive material and connected to an output terminal; a fixed terminal connected to an input lead and installed in an insulated state from the conductive case through an insulating bushing on one side of the conductive case; a movable support installed on the other side of the receiving space of the conductive case and melting upon overheating; a movable terminal installed in a reciprocating structure in a space formed between the insulating bushing and the movable support when the conductive case is in a conductive state, which moves in the direction of the fixed terminal when supported by the movable support and moves out in the opposite direction of the fixed terminal when the support by the movable support is offset; and a small contact forming member disposed between the contact portion of the fixed terminal and the contact portion of the movable terminal, wherein a plurality of small contacts formed by contact wires are formed on the contact portion facing the contact portion of the terminal requiring contact formation.

[0032] Preferably, the small contact forming member comprises an insulating body having a length longer than a set discharge shielding distance, and an insulating core having a contact portion formed therein facing a contact portion of a terminal requiring contact formation;

[0033] It is configured to include a plurality of contact wires, each disposed on the insulating core, and each forming a plurality of small contacts that contact the contact portion of a terminal requiring contact formation at the contact portion. Effects of the invention

[0034] As described above, the temperature fuse for high-voltage DC current according to the present invention ensures sufficient current carrying capacity by allowing current to flow through small contacts formed by a small contact forming member, in normal operation, between the contact portion of the fixed terminal and the contact portion of the movable terminal.

[0035] In addition, when the fixed terminal and the movable terminal are disconnected, the small contacts formed in the contact portion of the small contact forming member are individually disconnected, thereby preventing the occurrence of a large-scale arc discharge, and consequently, the reliability of the disconnection is reduced due to the occurrence of a large-scale arc discharge in the past, or secondary safety accidents caused by explosions are prevented. Brief explanation of the drawing

[0036] FIG. 1 schematically shows the overall structure of a temperature fuse for high-voltage direct current according to the present invention, and FIGS. 2 and 3 show the overall configuration of a cylindrical thermal fuse proposed as an embodiment of the present invention, and FIGS. 4 and 5 show the detailed configuration of a small contact forming member in a temperature fuse for high-voltage DC current proposed as a preferred embodiment of the present invention, and FIGS. 6 and 7 are operational state diagrams showing the current conduction state and the open circuit state of a high-voltage DC current through a temperature fuse for high-voltage DC current proposed as a preferred embodiment in the present invention. Specific details for implementing the invention

[0037] Hereinafter, a high-voltage direct current temperature fuse proposed as a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0038] FIG. 1 schematically shows the overall structure of a temperature fuse for high-voltage DC current according to the present invention, FIG. 2 and FIG. 3 show the overall configuration of a cylindrical temperature fuse proposed as an embodiment of the present invention, FIG. 4 and FIG. 5 show the detailed configuration of a small contact forming member in a temperature fuse for high-voltage DC current proposed as a preferred embodiment of the present invention, and FIG. 6 and FIG. 7 are operational state diagrams showing the conduction state and disconnection state of high-voltage DC current through a temperature fuse for high-voltage DC current proposed as a preferred embodiment of the present invention.

[0039] The temperature fuse (1) proposed as a preferred embodiment in the present invention is configured to include a fixed terminal (20) connected to a first lead (L1) as shown in FIG. 1; and a movable terminal (40) connected to a second lead (L2), which normally moves in the direction of the fixed terminal (20) and is connected to the fixed terminal (20), and when the surrounding area is abnormally heated, moves in the opposite direction of the fixed terminal (20) and is disconnected from the fixed terminal (20), thereby protecting the circuit from abnormal heating.

[0040] In this specification, as shown in FIGS. 2 to 3 and FIGS. 6 to 7, a cylinder-type thermal fuse (1) is described by exemplifying a cylinder-type thermal fuse (1) in which a fixed terminal (20), a movable terminal (40), and a movable support (70) that switches the support state of the movable terminal (40) according to abnormal heating are arranged in a cylinder-type thermal case (10), and depending on whether the movable support (70) melts due to abnormal heating, the movable terminal (40) enters toward the fixed terminal (20) or moves toward the opposite direction of the fixed terminal (20), thereby changing the current state between the fixed terminal (20) and the movable terminal (40). The technical concept proposed in this invention is not limited to application to cylinder-type thermal fuses.

[0041] The cylinder-type thermal fuse (1) proposed as an embodiment in the present invention comprises: a conductive case (10) having a receiving space (10a) with one side open, formed by a cylinder body of a conductive material to which a second lead (L2) is connected; a movable support (70) installed on the other side of the receiving space (10a) of the conductive case (10) and melting upon overheating; and a fixed terminal (20) connected to a first lead (L1), installed on one side of the conductive case (10) in an insulated state from the conductive case (10) through an insulating bushing (30). It includes a movable terminal (40) that is in contact with the above-mentioned conductive case (10) and is installed in a forward-and-backward structure between a fixed terminal (20) and a usable support (70), so that when moving in the direction of the fixed terminal (20), current flows between the conductive case (10) and the fixed terminal (20), and when moving out in the opposite direction of the fixed terminal (20), current flows between the conductive case (10) and the fixed terminal (20).

[0042] Preferably, a first spring (50) is installed between the insulating bushing (30) and the movable terminal (40) to apply force to the movable terminal (40) in the opposite direction to the fixed terminal (20), and a second spring (60) is installed between the movable support (70) and the movable terminal (40) to apply force to the movable terminal (40) in the direction of the fixed terminal (20).

[0043] At this time, the elastic force of the first spring (50) is configured to be smaller than the elastic force of the second spring (60), so that when the available support (70) is in a solid state, the first spring (50) is compressed by the elastic force of the second spring (60) and the movable terminal (40) enters in the direction of the fixed terminal (20).

[0044] And, when the available support (70) melts due to abnormal heat generation of the device, the elastic force of the second spring (60) is offset, so the first spring (50) extends and the movable terminal (40) advances in the opposite direction of the fixed terminal (20).

[0045] Meanwhile, an arc discharge phenomenon occurs during the disconnection process of the fixed terminal (20) and the movable terminal (40) by a high-voltage direct current flowing between the fixed terminal (20) and the movable terminal (40) of the above-mentioned temperature fuse (1), and the arc discharge phenomenon has the characteristic that increases as the contact area (contact area) between the fixed terminal (20) and the movable terminal (40) becomes larger.

[0046] However, the fixed terminal (20) and the movable terminal (40) must have a sufficient contact area to conduct the required high-voltage direct current, but due to the increase in the contact area, a large-scale arc discharge occurs when the fixed terminal (20) and the movable terminal (40) are disconnected due to overcurrent.

[0047] That is, if the contact area between the fixed terminal (20) and the movable terminal (40) is reduced, arc discharge is reduced, thereby ensuring reliability and safety against open circuits, but the capacity for conducting high-voltage DC current is reduced.

[0048] On the other hand, if a high-voltage DC current is passed through a contact section with a wide contact area to secure a sufficient current-carrying area, a large-scale arc discharge occurs during the disconnection process due to the wide current-carrying area.

[0049] In this way, when a large-scale arc discharge occurs due to a large contact area when the fixed terminal (20) and the movable terminal (40) are disconnected, the disconnection of the fixed terminal (20) and the movable terminal (40) may be delayed or the fixed terminal (20) and the movable terminal (40) may become stuck, causing an overcurrent consisting of a continuous high-voltage DC current to flow between the fixed terminal (20) and the movable terminal (40). In particular, due to an explosion caused by a large-scale arc discharge, fragments or flames may scatter to the surrounding area, potentially causing secondary safety accidents such as fire.

[0050] In order to resolve these problems, the present invention does not directly contact the contact portion (21) of the fixed terminal (20) and the contact portion (41) of the movable terminal (40) to conduct electricity, and as shown in FIGS. 1 to 3, a small contact forming member (80) is arranged such that a plurality of small contacts (P) with a narrow contact area are formed between the contact portion (21) of the fixed terminal (20) and the contact portion (41) of the movable terminal (40).

[0051] Accordingly, the contact portion (21) of the fixed terminal (20) and the contact portion (41) of the movable terminal (40) are not energized through a single contact with a wide energizing area, but are divided and energized through narrow small contacts (P) with divided energizing areas, thereby securing a sufficient contact area required for the energizing of the required high-voltage DC current, while preventing the occurrence of a large-scale arc discharge through individual disconnection of the small contacts (P) with narrow energizing areas in the event of disconnection.

[0052] As shown in FIGS. 3 to 7, the above small contact forming member (80) is positioned between the fixed terminal (20) and the movable terminal (40) and forms a plurality of small contacts (P) with a narrow contact area with the contact portions (21, 41) of the terminals (20, 40) facing each other, so that the small contacts (P) are brought into contact with the contact portions (21, 41) of the terminals (20, 40) requiring contact formation, thereby allowing the fixed terminal (20) and the movable terminal (40) to be electrically connected through the plurality of small contacts (P).

[0053] Preferably, the small contact forming member (80) comprises an insulating body having a length longer than the set discharge shielding distance (L) and an insulating core (81) having a contact portion formed therein; and a plurality of contact wires (82) each disposed on the insulating core (81) and forming a small contact (P) that is divided and contacted at each contact portion (21, 41) of the terminal (20, 40) facing the contact portion (21, 41) of the terminal (20, 40) that requires contact formation.

[0054] Here, the insulating core (81) is composed of an insulating body made of any one of ceramic material, synthetic resin material, quartz, or glass.

[0055] In the first embodiment of the present invention, as shown in FIG. 4, a plurality of partition alignment paths (81a) shielded by partition shielding pieces (81a-a) are formed on the outer diameter surface of the insulating core (81), and a contact wire (82) is arranged in the longitudinal direction on the partition alignment paths (81a) to form a plurality of small contact points (P) protruding from the contact parts (S1, S2) formed on both sides of the insulating core (81).

[0056] In addition, in the second embodiment of the present invention, as shown in FIG. 5, section alignment paths (81a) are formed that penetrate the insulating core (81) in the longitudinal direction, and a contact wire (82) is arranged to penetrate each section alignment path (81a), thereby forming a plurality of small contact points (P) protruding from the contact parts (S1, S2) formed on both sides of the insulating core (81).

[0057] In addition, in this embodiment, an end insertion groove (81c) is formed in the contact portion (S1, S2) of the insulating core (81) to receive the ends of the contact wires (82), so that the ends of the contact wires (82) aligned in each section alignment path (81a, 81b) are inserted into the end insertion groove (81c) and aligned.

[0058] Preferably, the contact wire (82), which is disposed on the insulating core (81) and forms small contacts (P) on the contact portions (S1, S2), is composed of a conductive wire having a thickness of 0.01 mm to 1 mm or less, and the set discharge shielding distance (L) formed by the small contact forming member (80) is preferably 1 mm to 20 mm or less, as shown in FIGS. 1 and FIGS. 5.

[0059] For example, if the set discharge shielding distance (L) is formed to be shorter than the reference value, an arc discharge occurs between the contact part (21) of the fixed terminal (20) and the contact part (41) of the movable terminal (40) during the disconnection process, so it is difficult to prevent a large-scale arc from occurring during the disconnection process.

[0060] Additionally, the above-mentioned small contact forming member (80) may be installed or formed in a state of being energized at the contact portion (21) of the fixed terminal (20) and dividedly energized with the contact portion (41) of the movable terminal (40) through a plurality of small contacts (P) formed at the contact portion contact portion (S2), or formed in a state of being energized at the contact portion (41) of the movable terminal (40) and dividedly energized with the contact portion (21) of the fixed terminal (20) through a plurality of small contacts (P) formed at the contact portion contact portion (S1), and all of these are intended to be within the scope of the present invention.

[0061] However, in this embodiment, a plurality of small contacts (P) composed of contact wires (82) are formed on each of the contact portions (S1, S2) formed on each side of the insulating core (81), so that the contact portion (21) of the fixed terminal (20) and the contact portion (41) of the movable terminal (40) form contacts through the small contacts (P) by the small contact forming member (80).

[0062] For example, one side of a small contact forming member (80), in which small contacts (P) are formed on each side of the insulating core (81), is placed in close contact with the contact portion (41) of the movable terminal (40), and a first spring (50) is used to resiliently hold the small contact forming member (80) and the insulating bushing (30) together, so that the small contacts (P) formed on one side of the insulating core (81) are fixed to the contact portion (41) of the movable terminal (40) by the resilient force provided through the first spring (50), thereby ensuring constant electrical connection with the movable terminal (40).

[0063] And, as shown in FIG. 6, the small contacts (P) formed on the side of the insulating core (81) facing the contact portion (21) of the fixed terminal (20) form a split contact state through the contact portion (21) of the fixed terminal (20) and the small contacts (P) when the movable terminal (40) enters the direction of the fixed terminal (20), thereby allowing the fixed terminal (20) and the movable terminal (40) to be electrically connected.

[0064] At this time, the fixed terminal (20) and the movable terminal (40) are divided into contacts through small contacts (P) formed by the small contact forming member (80), thereby ensuring sufficient current carrying capacity for the required high-voltage DC current.

[0065] In addition, as shown in FIG. 2, an insulating support member (83) is further disposed between the small contact forming member (80) and the first spring (50), so that an insulating support state is formed between the first spring (50) and the small contact (P) formed on the small contact forming member (80) by the insulating support member (83).

[0066] Additionally, as shown in FIG. 7, when the movable support (70) melts due to abnormal overheating of the peripheral area and the movable terminal (40) moves in the opposite direction of the fixed terminal (20), the small contacts (P) formed on the other side of the insulating core (81) are individually disconnected from the contact portion (21) of the fixed terminal (20), and thus the connection between the fixed terminal (20) and the movable terminal (40) is severed.

[0067] At this time, the contact portion (21) of the fixed terminal (20) is disconnected from the movable terminal (40) through individual disconnection with small contact points (P) with a narrow contact area, so a large-scale arc discharge phenomenon is prevented during the disconnection process with the fixed terminal (20).

[0068] The embodiments and other embodiments of the present invention described above are merely illustrative, and those skilled in the art will readily understand that various modifications and equivalent alternative embodiments are possible therefrom.

[0069] Therefore, it will be well understood that the present invention is not limited only to the forms mentioned in the detailed description above.

[0070] Accordingly, the true technical scope of protection of the present invention should be determined by the technical concept of the appended claims. Furthermore, the present invention should be understood to include all variations, equivalents, and substitutions within the spirit and scope of the invention as defined by the appended claims. Explanation of the symbols

[0072] 1. Thermal fuse 10. Conductive case 10a. Accommodation space 20. Fixed terminal 21. Contact part 30. Insulating bushing 40. Movable terminal 41. Contact part 50. First spring 60. Second spring 70. Usable support 80. Small contact forming member 81. Insulating core S1. Contact part contact part S2. Contact part contact part 81a. Open-type compartment alignment path 81a-a. Compartment shielding piece 81a-b. Insulating layer 81b. Through-type compartment alignment path 81c. End entry groove 82. Contact wire 82a. End 83. Insulating support member P. Small contact L1. First lead L2. Second lead

Claims

Claim 1 A fixed terminal connected to a first lead and having a contact portion formed therein; and a movable terminal connected to a second lead, normally moving toward the fixed terminal, and moving toward the opposite direction of the fixed terminal when the surrounding area is abnormally heated, with a contact portion formed therein; The device is configured to include a small contact forming member disposed between the contact portion of the fixed terminal and the contact portion of the movable terminal, wherein a plurality of small contacts are formed in a first contact portion facing the contact portion of the fixed terminal and a second contact portion facing the contact portion of the movable terminal; wherein the small contact forming member is configured such that when the movable terminal enters the direction of the fixed terminal, it makes divided contact with the contact portion of the fixed terminal through the small contacts formed in the first contact portion, thereby energizing the contact portion of the fixed terminal and the contact portion of the movable terminal through the divided small contacts, and when the movable terminal moves in the opposite direction of the fixed terminal, it disconnects the contact portion of the fixed terminal and the contact portion of the movable terminal through the individual disconnection of the small contacts in contact with the contact portion of the fixed terminal; and the small contact forming member is composed of an insulating body having a length longer than a set discharge shielding distance, and comprises an insulating core having the first contact portion facing the contact portion of the fixed terminal and the second contact portion facing the contact portion of the movable terminal formed therein; and wherein each of the insulating core A high-voltage direct current temperature fuse characterized by comprising a plurality of contact wires arranged to each form a plurality of small contacts that contact the contact portion of the fixed terminal requiring contact formation at the first contact portion and the contact portion of the movable terminal requiring contact formation at the second contact portion. Claim 2 A conductive case having a receiving space with one side open, formed by a cylinder body of a conductive material and connected to an output terminal; a fixed terminal connected to an input lead and installed on one side of the conductive case in an insulated state from the conductive case through an insulating bushing; a movable support installed on the other side of the receiving space of the conductive case and melting upon overheating; and a movable terminal that is electrically connected to the conductive case and installed in a reciprocating structure in a gap formed between the insulating bushing and the movable support, which moves in the direction of the fixed terminal when supported by the movable support and moves out in the opposite direction of the fixed terminal when the support by the movable support is offset. A high-voltage direct current temperature fuse comprising: a small contact forming member disposed between the contact portion of the fixed terminal and the contact portion of the movable terminal, wherein a plurality of small contacts are formed in a first contact portion facing the contact portion of the fixed terminal and a second contact portion facing the contact portion of the movable terminal; wherein the small contact forming member is made of an insulating body having a length longer than a set discharge shielding distance, and the first contact portion facing the contact portion of the fixed terminal and the second contact portion facing the contact portion of the movable terminal are formed; and an insulating core having a plurality of contact wires each disposed in the insulating core and each forming a plurality of small contacts that contact the contact portion of the fixed terminal requiring contact formation in the first contact portion and the contact portion of the movable terminal requiring contact formation in the second contact portion. Claim 3 A high-voltage direct current temperature fuse according to claim 2, characterized in that a first spring is installed to apply force to the movable terminal in the opposite direction to the fixed terminal, and a second spring is installed to apply force to the movable terminal in the direction of the fixed terminal while being supported by the movable support. Claim 4 delete Claim 5 A conductive case having a receiving space with one side open, formed by a cylinder body of a conductive material and connected to an output terminal; a fixed terminal connected to an input lead, installed on one side of the conductive case in an insulated state from the conductive case through an insulating bushing; a movable support installed on the other side of the receiving space of the conductive case and melting upon overheating; and a movable terminal that is electrically connected to the conductive case and installed in a reciprocating structure in a gap formed between the insulating bushing and the movable support, which moves in the direction of the fixed terminal when supported by the movable support and moves out in the opposite direction of the fixed terminal when the support by the movable support is offset. A high-voltage direct current temperature fuse comprising a small contact forming member disposed between the contact portion of the fixed terminal and the contact portion of the movable terminal, wherein a plurality of small contacts are formed in a first contact portion facing the contact portion of the fixed terminal and a second contact portion facing the contact portion of the movable terminal, wherein the first and second contact portions are formed on both sides of an insulating core constituting the small contact forming member, wherein a plurality of small contacts are formed in the first contact portion formed on one side of the insulating core, the first contact portion is composed of contact wires and forms a small contact with the contact portion of the fixed terminal, and a plurality of small contacts are formed in the second contact portion formed on the other side of the insulating core, the second contact portion is formed, the second contact portion is formed, the second contact portion is formed, the second contact portion is formed, the second contacts are formed a small contact with the contact portion of the movable terminal. Claim 6 A conductive case having a receiving space with one side open, formed by a cylinder body of a conductive material and connected to an output terminal; a fixed terminal connected to an input lead and installed on one side of the conductive case in an insulated state from the conductive case through an insulating bushing; a movable support installed on the other side of the receiving space of the conductive case and melting upon overheating; and a movable terminal that is electrically connected to the conductive case and installed in a reciprocating structure in a gap formed between the insulating bushing and the movable support, which moves in the direction of the fixed terminal when supported by the movable support and moves out in the opposite direction of the fixed terminal when the support by the movable support is offset. A high-voltage direct current temperature fuse comprising a small contact forming member disposed between the contact portion of the fixed terminal and the contact portion of the movable terminal, wherein a plurality of small contacts are formed in a first contact portion facing the contact portion of the fixed terminal and a second contact portion facing the contact portion of the movable terminal, wherein the small contact forming member is formed in a state in which a contact wire is energized with either the contact portion of the fixed terminal or the contact portion of the movable terminal, and wherein the first contact portion facing the contact portion of the fixed terminal and the second contact portion facing the contact portion of the movable terminal are formed, while, wherein small contacts composed of a contact wire are formed in the first contact portion and are in split contact with the contact portion of the fixed terminal, and small contacts are formed in the second contact portion and are in split contact with the contact portion of the movable terminal. Claim 7 A high-voltage direct current temperature fuse according to claim 1 or 2, characterized in that a plurality of compartment alignment paths partitioned by compartment shielding pieces are formed longitudinally in the insulating core, and a contact wire is disposed in each compartment alignment path. Claim 8 A high-voltage direct current temperature fuse according to claim 1 or 2, characterized in that a plurality of compartment alignment paths are formed in the insulating core that penetrate in the longitudinal direction, and a contact wire is arranged to penetrate each compartment alignment path. Claim 9 A high-voltage direct current temperature fuse, characterized in that, in the first and second contact portions of the insulating core, an end inlet groove is formed to receive the ends of contact wires aligned in a compartment alignment path, and the ends of the contact wires aligned in each compartment alignment path are received into the end inlet groove and aligned. Claim 10 A high-voltage direct current temperature fuse, characterized in that, in the first and second contact portions of the insulating core, an end inlet groove is formed to receive the ends of contact wires aligned in a compartment alignment path, and the ends of the contact wires aligned in each compartment alignment path are received into the end inlet groove and aligned. Claim 11 A high-voltage direct current temperature fuse according to claim 3, characterized in that an insulating support member is further disposed between the small contact forming member and the first spring, and configured such that an insulating support state is formed between the first spring and the small contact formed on the small contact forming member by the insulating support member.

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