Fuse element for power fuse and power fuse including same

Abstract

According to the present invention, the fuse element for a power fuse may comprises a melting plate, a pair of first terminal plates, and a pair of second terminal plates. The fusing plate may include a melting part having a melting pattern formed thereon and a pair of terminal parts disposed on both sides of the melting part. The pair of first terminal plates may be coupled to the upper surfaces of the pair of terminal parts of the melting plate. The pair of second terminal plates may be coupled to the bottom surfaces of the pair of terminal parts of the melting plate.

Description

Fuse element for a power fuse and a power fuse including the same

[0001] The present invention relates to a power fuse, and more specifically, to a fuse element for a power fuse that can reduce manufacturing costs by reducing the number of components and simplifying the labor cost.

[0002] Generally, a power fuse is a device that interrupts the current between a power source and a load when specific situations, such as overheating in the power source due to abnormal current, occur, and it is used as the most common circuit auxiliary device. Power fuses are widely used in electrical equipment such as power distribution systems and control systems, and they are one of the protective devices widely used as short-circuit and overcurrent protectors.

[0003] An example of such a power fuse is illustrated in FIGS. 1 and FIGS. 2. FIGS. 1 is a perspective view illustrating an example of a conventional power fuse (1), and FIGS. 2 is a perspective view illustrating only the fuse element (10) with the fuse body (20) removed from the power fuse (1) illustrated in FIGS. 1.

[0004] The power fuse (1) shown in FIGS. 1 and 2 comprises a fuse element (10) and a fuse body (20).

[0005] The fuse body (20) has a cylindrical shape with a hollow portion and is formed of a ceramic material.

[0006] The fuse element (10) includes a plurality of blowing plates (12), a pair of terminal bases (14) coupled to both sides of the blowing plates (12), and a pair of terminal members (16) extending outwardly from each terminal base (14).

[0007] The melting plate (12) is made of a material that has high electrical conductivity and a relatively low melting point compared to other metals, such as silver (Ag). At least one, for example, four melting plates (12) are accommodated within the hollow portion of the fuse body (20). The melting plate (12) is provided with a melting pattern (13) that can be melted when an overcurrent is applied. The melting pattern (13) may be composed of a plurality of holes (13a) extending in the width direction of the melting plate (12).

[0008] The hollow portion of the fuse body (20) in which the fuse element (10)'s cutting plate (12) is received is filled with an arc-extinguishing material (not shown), such as quartz sand.

[0009] The terminal bases (14) coupled to both sides of the fusion plate (12) close both ends of the fuse body (20) that accommodates the fusion plate (12). The terminal bases (14) are formed of a material with high electrical conductivity, such as aluminum or copper.

[0010] The cutting plate (12) and the terminal base (14) are joined to each other by welding, such as spot welding.

[0011] A terminal member (16) extends from the outer surface of the terminal base (14) to the outside of the terminal base (14). The terminal member (16) is also formed from a material with high electrical conductivity, such as aluminum, copper, or an alloy thereof. The terminal member (16) and the terminal base (14) are joined together by brazing.

[0012] In this power fuse (1), the fuse element (10) is manufactured by brazing the terminal member (16) and the terminal base (14) as described above, and then joining both ends of the fusion plate (12) to the terminal base (14) by spot welding. In particular, the spot welding operation for joining the fusion plate (12) to the terminal base (14) is performed several times along the width direction of the fusion plate (12) at both ends of the fusion plate (12).

[0013] Accordingly, the conventional fuse element (10) has the disadvantage of having a high manufacturing cost due to the large number of parts and labor costs.

[0014] The objective of the present invention, devised to solve the problems of the conventional technology mentioned above, is to provide a fuse element for a power fuse that can reduce manufacturing costs by reducing the number of parts and labor hours.

[0015] Another objective of the present invention is to provide a fuse element of a power fuse that is easy to assemble.

[0016] Another objective of the present invention is to provide a fuse element of a power fuse that can reduce material costs by parallelizing the melting plates.

[0017] Another objective of the present invention is to provide a power fuse comprising a fuse element capable of achieving the above objectives.

[0018] To achieve this purpose, a fuse element for a power fuse may be provided, comprising a melting plate, a pair of first terminal plates, and a pair of second terminal plates. The melting plate may have a melting portion having a melting pattern formed thereon and a pair of terminal portions disposed on both sides of the melting portion. A pair of first terminal plates may be coupled to the upper surface of a pair of terminal portions of the melting plate. A pair of second terminal plates may be coupled to the lower surface of a pair of terminal portions of the melting plate.

[0019] In one embodiment, the cutting plate and the first terminal plate may have a plurality of coupling holes formed at the same location, and the second terminal plate may include a plurality of caulking protrusions protruding through the plurality of coupling holes. By caulking the plurality of coupling protrusions, the first terminal plate, the terminal portion of the cutting plate, and the second terminal plate may be integrally coupled.

[0020] In one embodiment, the coupling hole of the first terminal plate may have an inner portion having the same diameter as the coupling hole of the welding plate and an outer portion having a larger diameter than the coupling hole of the welding plate. The perimeter surface of the inner portion of the coupling hole of the first terminal plate may form a caulking surface where the caulking projection of the second terminal plate is caulked.

[0021] In one embodiment, a fastening hole to which a power-side or load-side busbar is fastened may be formed by penetrating the first terminal plate, the terminal portion of the cutting plate, and the second terminal plate, and a plurality of coupling holes and a plurality of caulking protrusions may be arranged along the circumference of the fastening hole.

[0022] In one embodiment, the fuse element of the present invention may further include a melting plate coupled to the bottom surface of a pair of second terminal plates; and a pair of first terminal plates coupled to the bottom surface of a pair of terminal portions of the melting plate coupled to the bottom surface of the pair of second terminal plates. A plurality of caulking protrusions may be formed on the bottom surface of the pair of second terminal plates, protruding through the coupling hole of the melting plate and the coupling hole of the first terminal plate, which are positioned on the lower side of the pair of second terminal plates.

[0023] In one embodiment, the caulking protrusion formed on the bottom surface of the second terminal plate is arranged in a circumferentially staggered manner with respect to the caulking protrusion formed on the bottom surface of the second terminal plate, and the coupling hole of the additional first terminal plate positioned on the lower side of the second terminal plate may be arranged in a circumferentially staggered manner with respect to the coupling hole of the first terminal plate positioned on the upper side of the second terminal plate. The cutting plates may have a number of coupling holes equal to the sum of the number of caulking protrusions formed on the upper and lower surfaces of the second terminal plate.

[0024] In one embodiment, the thickness of the second terminal plate may be thicker than the thickness of the first terminal plate.

[0025] In one embodiment, the cutting pattern of the cutting portion of the cutting plate may include one or more rows of one or more cutting holes extending along the width direction of the cutting plate.

[0026] In one embodiment, the cutting portion of the cutting plate may include at least two divided cutting portions spaced apart by one or more dividing grooves extending across the cutting portion from one end portion to the other end portion.

[0027] In addition, a power fuse may be provided comprising a fuse element having at least one of the features described above, and a fuse body that accommodates the melting portion of the melting plate of the fuse element.

[0028] According to a fuse element for a power fuse according to one embodiment of the present invention, the terminal base, where the melting plate was conventionally spot-welded, can be eliminated, thereby reducing the number of components. In addition, by eliminating the spot welding and brazing processes for joining components, material costs and process time can be reduced.

[0029] In addition, the fuse element according to one embodiment of the present invention can make the assembly process very simple by joining parts by a caulking process instead of conventional spot welding and brazing processes.

[0030] In addition, a fuse element according to one embodiment of the present invention may have two or more divided cutting sections provided in parallel on a single cutting plate. Accordingly, since the effect of a conventional fuse element having two cutting plates can be obtained with a single cutting plate, the effect of reducing material costs by reducing the number of cutting plates can also be obtained.

[0031] In addition, a power fuse according to one embodiment of the present invention includes a fuse element assembled by a caulking process instead of a spot welding and brazing process, thereby reducing material costs and achieving the effect of simple assembly.

[0032] FIG. 1 is a perspective view illustrating a conventional power fuse.

[0033] FIG. 2 is a perspective view illustrating the fuse element of the power fuse shown in FIG. 1.

[0034] FIG. 3 is a perspective view illustrating a fuse element according to a first embodiment of the present invention.

[0035] FIG. 4 is a plan view of a fuse element according to the first embodiment of the present invention shown in FIG. 3.

[0036] FIG. 5 is a side view of a fuse element according to the first embodiment of the present invention shown in FIG. 3.

[0037] FIG. 6 is an exploded perspective view of a fuse element according to the first embodiment of the present invention shown in FIG. 3.

[0038] FIG. 7 is a perspective view illustrating a fuse element according to a second embodiment of the present invention.

[0039] FIG. 8 is an exploded perspective view of a fuse element according to a second embodiment of the present invention shown in FIG. 7.

[0040] FIG. 9 is a perspective view illustrating a fuse element according to another third embodiment of the present invention.

[0041] Hereinafter, a fuse element of a power fuse according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments described herein are intended to enable those skilled in the art to easily understand and implement the present invention, and the technical concept and scope of the present invention are not limited by the preferred embodiments of the present invention illustrated in the accompanying drawings and described with reference thereto.

[0042] FIG. 3 is a perspective view illustrating a fuse element (100) according to a first embodiment of the present invention, FIG. 4 is a plan view illustrating a fuse element (100) according to a first embodiment of the present invention, FIG. 5 is a side view illustrating a fuse element (100) according to a first embodiment of the present invention, and FIG. 6 is an exploded perspective view illustrating a fuse element (100) according to a first embodiment of the present invention.

[0043] Referring to FIGS. 3 to 6, the fuse element (100) of the present invention includes a melting plate (110), a pair of first terminal plates (120), and a pair of second terminal plates (130).

[0044] In the illustrated example, a pair of first terminal plates (120) are disposed on the upper surface of the cutting plate (110), and a pair of second terminal plates (130) are disposed on the lower surface of the cutting plate (110). However, the positions of the first terminal plates (120) and the second terminal plates (130) can be swapped.

[0045] The melting plate (110) is a rectangular plate-shaped member in which a central melting portion (112) and a pair of terminal portions (114) arranged on both sides of the melting portion (112) are integrally formed. The melting plate (110) is made of a material that has high electrical conductivity and a relatively lower melting point compared to other metals, such as silver (Ag).

[0046] The severing portion (112) of the severing plate (110) is divided into at least two divided severing portions (113) by at least one dividing groove (112a) formed across the severing portion (112) in the longitudinal direction of the severing plate (110) between a pair of terminal portions (114) on both sides of the severing portion (112). By doing so, at least two divided severing portions (113) can form a parallel circuit in one severing plate (110).

[0047] Each divided cutting section (113) is provided with a cutting pattern (117) that can be cut when an overcurrent is applied. The cutting pattern (117) includes a row of multiple cutting holes (117a) arranged in the width direction of the divided cutting section (113), and at least one of these rows of cutting holes (117a) may be provided in the length direction of the divided cutting section (113).

[0048] In the illustrated example, the cutting portion (112) of the cutting plate (110) includes two divided cutting portions (113), and the cutting pattern (117) of each divided cutting portion (113) may include a row of two cutting holes (117a).

[0049] The terminal portion (114) of the terminal plate (110) is provided with a fastening hole (115) formed in the center of the terminal portion (114). A fuse element (100) can be coupled to a power-side bus and a load-side bus bar through a fastening group consisting of the fastening hole (115) of the terminal portion (114) and the corresponding fastening holes (122, 132) of the first and second terminal plates (130) described later.

[0050] A plurality of coupling holes (116), for example, eight coupling holes (116), may be arranged along the circumference of the coupling hole (115) around the fastening hole (115) of the terminal portion (114). The number of coupling holes (116) may be more or less than this. The caulking projection of the second terminal plate (130), which will be described later, may pass through the coupling hole (116) of the cutting plate (110) and protrude to the coupling hole (124) of the first terminal plate (120).

[0051] A pair of first terminal plates (120) are each disposed on the upper surface of a pair of terminal portions (114) of a melting plate (110). The first terminal plates (120) are formed in the same shape as the terminal portions (114) of the melting plate (110). The first terminal plates (120) may be formed from a material with high electrical conductivity, such as aluminum, copper, or an alloy thereof.

[0052] In the first terminal plate (120), a fastening hole (122) corresponding to the fastening hole (115) of the terminal portion (114) of the cutting plate (110) is formed at the same location and with the same size as the fastening hole (115) of the terminal portion (114).

[0053] A plurality of coupling holes (124), for example, eight coupling holes (124), may be arranged along the circumference of the fastening hole (122) of the first terminal plate (120). The number of coupling holes (124) may be more or less than this. The number and location of the coupling holes (124) of the first terminal plate (120) correspond to the number and location of the coupling holes (116) of the cutting plate (110).

[0054] The coupling hole (124) of the first terminal plate (120) has an inner part having the same diameter as the coupling hole (116) of the terminal part (114) of the fusion plate (110), and an outer part having an expanded shape having a larger diameter than the coupling hole (116) of the terminal part (114) of the fusion plate (110). In the illustrated example, the inner part of the coupling hole (124) is the lower part of the coupling hole (124), and the outer part of the coupling hole (124) is the upper part of the coupling hole (124). The lower part of the coupling hole (124), that is, the circumferential surface of the inner part, can form a caulking surface (124a) on which the caulking projection of the second terminal plate (130), described later, is caulked.

[0055] A pair of second terminal plates (130) are each disposed on the bottom surface of a pair of terminal portions (114) of a melting plate (110). The second terminal plates (130) are formed with the same planar shape as the terminal portions (114) of the melting plate (110). The second terminal plates (130) may be formed from a material with high electrical conductivity, such as aluminum, copper, or an alloy thereof. The second terminal plates (130) may be formed from the same material as the first terminal plate (120) or from a different material.

[0056] In the second terminal plate (130), a fastening hole (132) corresponding to the fastening hole (115) of the terminal portion (114) of the cutting plate (110) and the fastening hole (122) of the first terminal plate (120) is formed at the same location and of the same size.

[0057] Additionally, a plurality of caulking protrusions (134) corresponding to a plurality of coupling holes (116) of the terminal portion (114) of the cutting plate (110) and a plurality of coupling holes (124) of the first terminal plate (120) are formed along the circumference around the fastening hole (132) of the second terminal plate (130). The plurality of caulking protrusions (134) protrude from the upper surface of the second terminal plate (130) through the coupling hole (116) of the terminal portion (114) of the cutting plate (110) to the upper part of the coupling hole (124) of the first terminal plate (120).

[0058] The caulking protrusion (134) of the second terminal plate (130) can be formed by embossing. In this case, the second terminal plate (130) can be formed thicker than the first terminal plate (120) so that the caulking protrusion (134) can protrude up to the upper part of the coupling hole (124) of the first terminal plate (120). In an alternative example, when the second terminal plate (130) is manufactured by casting, the caulking protrusion (134) can be cast integrally with the second terminal plate (130).

[0059] In the drawing, unexplained reference numerals 118, 126, and 136 are positioning holes for aligning the coupling positions of the fuse body and the fuse element (100) when coupling the fuse body to the fuse element (100) according to the first embodiment of the present invention.

[0060] A fuse element (100) according to the first embodiment of the present invention, configured as described above, can be assembled into one by placing a first terminal plate (120) and a second terminal plate (130) on the upper and lower surfaces, respectively, of the terminal portion (114) of the fusion plate (110), and riveting or caulking the caulking projection (134) of the second terminal plate (130). A power fuse can be completed by attaching a fuse body to the fuse element (100) to accommodate the fusion portion of the fusion plate (110) and filling the internal space of the fuse body with an arc extinguishing material.

[0061] As such, the fuse element (100) according to the first embodiment of the present invention can reduce the number of parts by eliminating the terminal base where the conventional fusion plate was spot welded, and can reduce material costs and process time by eliminating the spot welding and brazing processes for joining parts.

[0062] In addition, the fuse element (100) according to the first embodiment of the present invention can make the assembly process very simple by joining the parts by a caulking process instead of a conventional spot welding and brazing process.

[0063] In addition, the fuse element (100) according to the first embodiment of the present invention may have two or more divided cutting sections (113) arranged in parallel on a single cutting plate (110). Accordingly, since the effect of a conventional fuse element having two cutting plates can be obtained with a single cutting plate (110), the effect of reducing material costs by reducing the number of cutting plates (110) can also be obtained.

[0064] FIG. 7 is a perspective view illustrating a fuse element (100) according to a second embodiment of the present invention, and FIG. 8 is an exploded perspective view illustrating a fuse element (100) according to a second embodiment of the present invention.

[0065] A fuse element (100) according to a second embodiment of the present invention illustrated in FIGS. 7 and 8 comprises two fuse plates (110), two pairs of first terminal plates (120a, 120b), and a pair of second terminal plates (130), and is formed in a two-layer structure in which a pair of second terminal plates (130) are disposed between two fuse plates (110), a pair of first terminal plates (120a, 120b) are disposed on the upper surface of the upper fuse plate (110), and another pair of first terminal plates (120a, 120b) are disposed on the lower surface of the lower fuse plate (110).

[0066] That is, the fuse element (100) according to the second embodiment of the present invention additionally includes a melting plate (110) and a pair of first terminal plates (120a, 120b) in addition to the configuration of the fuse element (100) according to the first embodiment of the present invention described above with reference to FIGS. 3 to 6. For convenience and clarity of explanation, descriptions that overlap with the first embodiment described above are omitted, and only the parts that differ are described.

[0067] In the case of the second embodiment, an additional cutting plate (110) is disposed on the bottom surface of the second terminal plate (130), and an additional first terminal plate (120a, 120b) is disposed on the bottom surface of the terminal portion (114) of the additional cutting plate (110).

[0068] As described below, the first terminal plate (120a) and the first terminal plate (120b) have the same shape except that the coupling holes (124) are formed in a circular direction and are staggered from each other, and a pair of first terminal plates (120a, 120b) are paired and respectively placed on the upper and lower sides of the second terminal plate (130).

[0069] Additionally, a plurality of caulking protrusions (134) may also be provided on the bottom surface of the second terminal plate (130). The caulking protrusions (134) provided on the bottom surface of the second terminal plate (130) penetrate the coupling hole (116) of the terminal portion (114) of the additional cutting plate (110) and protrude to the lower part of the coupling hole (124) of the lower first terminal plate (120a, 120b).

[0070] When the caulking protrusions (134) of the second terminal plate (130) are formed by embossing, the caulking protrusions (134) provided on the upper surface and the caulking protrusions (134) provided on the lower surface of the second terminal plate (130) can be formed in an alternating manner in the circumferential direction so as to form caulking protrusions (134) on both the upper surface and the lower surface of the second terminal plate (130). In FIG. 8, the recesses (135) shown between the caulking protrusions (134) formed on the upper surface of the second terminal plate (130) are formed by embossing to form caulking protrusions (134) on the lower surface of the second terminal plate (130).

[0071] The second terminal plate (130) can be formed thicker than the first terminal plate (120) so that the cutting plates (110) positioned on the upper and lower sides of the second terminal plate (130) are sufficiently spaced apart to prevent problems such as short circuits from occurring.

[0072] As the caulking protrusions (134) provided on the bottom surface of the second terminal plate (130) are formed in an alternating manner with the caulking protrusions (134) provided on the top surface, the coupling holes (116) of the lower cutting plate (110) through which the caulking protrusions (134) provided on the bottom surface of the second terminal plate (130) pass can also be formed in an alternating manner in the circumferential direction with the coupling holes (116) of the upper cutting plate (110), and the corresponding coupling holes (124) of the lower first terminal plate (120a, 120b) can also be formed in an alternating manner in the circumferential direction with the coupling holes (124) of the upper first terminal plate (120a, 120b).

[0073] In the illustrated example, the coupling holes (116) of the terminal portion (114) of the cutting plate (110) may be formed in 16 places, which is twice the 8 places exemplified in the first embodiment, so as to accommodate all the positions of the caulking protrusions (134) formed on the upper and lower surfaces of the second terminal plate (130). Accordingly, the same cutting plate (110) can be used on the upper and lower sides of the second terminal plate (130), thereby achieving cost reduction effects through parts commonization.

[0074] In the case of the first terminal plate, two types of first terminal plates (120a, 120b) may be provided in which the positions of the coupling holes (124) are formed to be staggered relative to each other in the circumferential direction.

[0075] In the example illustrated in FIGS. 7 and 8, a pair of second terminal plates (130) are arranged in an inverted manner relative to each other, and accordingly, the caulking protrusions (134) formed on the upper surface of the pair of second terminal plates (130) are arranged in an alternating manner relative to each other.

[0076] And a pair of first terminal plates (120a, 120b) are positioned on the upper side of the second terminal plate (130) in alignment with the position of the caulking projection (134) positioned on the upper surface of the pair of second terminal plates (130), and another pair of first terminal plates (120a, 120b) are positioned on the lower side of the second terminal plate (120) in alignment with the position of the caulking projection (134) positioned on the lower surface of the pair of second terminal plates (130).

[0077] In order for the caulking projection (134) provided on the bottom surface of the second terminal plate (130) to be caulked into the coupling hole (124) of the lower first terminal plate (120a, 120b), the lower first terminal plate (120a, 120b) may be arranged in an inverted form relative to the upper first terminal plate (120a, 120b). That is, in the lower first terminal plate (120), the inner part of the coupling hole (124) may become the upper part of the coupling hole (124), and the outer part of the coupling hole (124) may become the lower part of the coupling hole (124).

[0078] The fuse element (100) according to the second embodiment of the present invention, which is formed in a two-layer structure as described above, has two divided cutting sections (113) on each of the two cutting plates (110), for a total of four divided cutting sections (113). Accordingly, it can replace the conventional fuse element (100) having four cutting plates (110) with a simplified structure.

[0079] FIG. 9 is a perspective view illustrating a fuse element (100) according to a third embodiment of the present invention.

[0080] The fuse element (100) according to the third embodiment of the present invention illustrated in FIG. 9 is identical to the fuse element (100) according to the second embodiment of the present invention described with reference to FIG. 7 and FIG. 8, except that it includes three divided cutting sections (113) in which each cutting plate (110) is arranged in parallel, and thus has a total of six divided cutting sections (113).

[0081] In addition, by housing the melting portion of the fuse element according to the above-described embodiments in a fuse body, sealing it, and filling the inside with an arc extinguishing material, a power fuse having the above-described effect can be provided.

[0082] The embodiments described above illustrate the best embodiments for implementing the present invention, and those skilled in the art will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Therefore, these embodiments are merely for illustrative purposes, not for limiting the technical concept of the present invention. Consequently, it should be understood that the scope of the technical concept of the present invention is not limited by these embodiments. That is, the scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention.

Claims

1. A cutting plate having a cutting portion having a cutting pattern formed thereon and a pair of terminal portions disposed on both sides of the cutting portion; A pair of first terminal plates coupled to the upper surface of a pair of terminal portions of the above-mentioned cutting plate; and A fuse element for a power fuse comprising a pair of second terminal plates coupled to the bottom surface of a pair of terminal portions of the above-mentioned fusion plate.

2. In Paragraph 1, The above-mentioned cutting plate and the above-mentioned first terminal plate are provided with a plurality of coupling holes formed at the same location, and The second terminal plate includes a plurality of caulking protrusions that protrude through the plurality of coupling holes, and A fuse element for a power fuse in which the first terminal plate, the terminal portion of the cutting plate, and the second terminal plate are integrally combined by the caulking of the plurality of caulking protrusions.

3. In Paragraph 2, A fuse element for a power fuse, wherein the coupling hole of the first terminal plate has an inner portion having the same diameter as the coupling hole of the fusion plate and an outer portion having a larger diameter than the coupling hole of the fusion plate, and the inner circumferential surface of the coupling hole of the first terminal plate forms a caulking surface to which the caulking projection of the second terminal plate is caulked.

4. In Paragraph 2, A fastening hole to which a power-side or load-side busbar is fastened is formed penetrating the first terminal plate, the terminal portion of the cutting plate, and the second terminal plate, and The plurality of coupling holes and the plurality of caulking protrusions are fuse elements for a power fuse arranged along the circumference of the fastening holes.

5. In Paragraph 4, A cutting plate coupled to the bottom surface of the above pair of second terminal plates; and It further includes a pair of first terminal plates coupled to the bottom surface of a pair of terminal portions of a cutting plate coupled to the bottom surface of the pair of second terminal plates, and A fuse element for a power fuse, wherein a plurality of caulking protrusions are formed on the bottom surface of the pair of second terminal plates, protruding through the coupling hole of a cutting plate positioned below the pair of second terminal plates and the coupling hole of a first terminal plate.

6. In Paragraph 5, The caulking protrusion formed on the bottom surface of the second terminal plate is arranged to be staggered relative to the caulking protrusion formed on the top surface of the second terminal plate in the circumferential direction, and The coupling hole of the first terminal plate positioned on the lower side of the second terminal plate is arranged to be staggered relative to the coupling hole of the first terminal plate positioned on the upper side of the second terminal plate in the circumferential direction, and The above-mentioned cutting plates are fuse elements for power fuses having a number of coupling holes equal to the sum of the number of caulking protrusions formed on the upper and lower surfaces of the above-mentioned second terminal plate.

7. In Paragraph 6, The coupling hole of one of the pair of first terminal plates positioned on the upper side of the second terminal plate is arranged to be staggered relative to the coupling hole of the other first terminal plate in the circumferential direction, and the coupling hole of one of the pair of first terminal plates positioned on the lower side of the second terminal plate is arranged to be staggered relative to the coupling hole of the other first terminal plate in the circumferential direction. A fuse element for a power fuse in which a pair of first terminal plates disposed on the upper side of the second terminal plate and a pair of first terminal plates disposed on the lower side of the second terminal plate have coupling holes that are staggered in the circumferential direction, and the first plates are disposed to face each other on the upper and lower sides of the second terminal plate.

8. In Paragraph 5, A fuse element for a power fuse in which the thickness of the second terminal plate is thicker than the thickness of the first terminal plate.

9. In Paragraph 1, A fuse element for a power fuse in which the melting pattern of the melting portion of the above melting plate includes one or more rows of one or more melting holes extending along the width direction of the above melting plate.

10. In Paragraph 1, A fuse element for a power fuse comprising at least two divided cutting sections spaced apart by one or more split grooves extending across the cutting section from one terminal section to the other terminal section of the above-mentioned cutting plate.

11. A fuse element pursuant to paragraph 1; and A power fuse comprising a fuse body that accommodates the melting portion of the melting plate of the fuse element.

Images