WO2014061418A1 - 電線ヒューズ - Google Patents
電線ヒューズ Download PDFInfo
- Publication number
- WO2014061418A1 WO2014061418A1 PCT/JP2013/076090 JP2013076090W WO2014061418A1 WO 2014061418 A1 WO2014061418 A1 WO 2014061418A1 JP 2013076090 W JP2013076090 W JP 2013076090W WO 2014061418 A1 WO2014061418 A1 WO 2014061418A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat spot
- core wire
- heat
- spot portion
- section
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/055—Fusible members
- H01H85/08—Fusible members characterised by the shape or form of the fusible member
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/055—Fusible members
- H01H85/08—Fusible members characterised by the shape or form of the fusible member
- H01H85/11—Fusible members characterised by the shape or form of the fusible member with applied local area of a metal which, on melting, forms a eutectic with the main material of the fusible member, i.e. M-effect devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
- H01H69/02—Manufacture of fuses
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/055—Fusible members
- H01H85/08—Fusible members characterised by the shape or form of the fusible member
- H01H85/10—Fusible members characterised by the shape or form of the fusible member with constriction for localised fusing
Definitions
- the present invention relates to a wire fuse.
- a core wire 110 that is a fusible body, a heat spot portion 120, a recess portion 130, and a low melting point metal 140 (see Patent Document 1).
- the core wire 110 is a conductor connected in series to a circuit to be protected by connection terminals 200 provided at both ends.
- the core wire 110 is finished into a circular cross section having a predetermined outer diameter by twisting a plurality of copper wires.
- the heat spot portion 120 is a portion in which a part of the core wire 110 is formed into a rod shape (square column shape) having a rectangular cross-sectional shape smaller than other portions by heat forming. .
- the hollow portion 130 is a portion formed to be recessed in the outer peripheral surface of the heat spot portion 120 having a rectangular cross section.
- each of two parallel surfaces on the outer peripheral surface of the heat spot unit 120 is provided with a recess 130.
- the low melting point metal 140 is disposed in the recess 130 by melting a metal chip having a melting point lower than that of the core wire 110 with heat.
- the low melting point metal 140 is melted by the heat generated by the heat spot 120 when a rated current flows through the core wire 110.
- the low melting point metal 140 is provided to adjust the fusing time of the heat spot part 120.
- This electric wire fuse 100 protects the circuit to which the electric wire fuse 100 is connected by melting the low-melting point metal 140 and melting the heat spot portion 120 when a current exceeding the rated value flows through the core wire 110.
- the core wire 110 is cut due to stress concentration on the corner portion or the like. It was easy to cause a decrease in yield.
- an object of the present invention is to provide an electric wire fuse that can improve the product yield by suppressing the core wire from being cut by a load acting at the time of forming the heat spot portion, in solving the above-described problems. There is.
- a core wire connected in series to a circuit to be protected by connection terminals provided at both ends, and a circular cross section having a smaller cross-sectional area than other portions by thermoforming a part of the core wire with a thermoforming mold
- the both end portions of the heat spot portion are formed with tapered portions that are concentric with the core wire and whose outer diameter gradually changes from the outer peripheral surface of the core wire to the outer peripheral surface of the heat spot portion (1)
- the heat spot portion is formed into a rod shape having a circular cross section, so that there is no corner portion where stress concentration is likely to occur during heat forming. Therefore, it can suppress that a core wire is cut
- the recessed portion is formed at the same time as the heat forming of the heat spot portion, the number of processing steps can be reduced and productivity can be improved.
- taper portions concentric with the core wire are formed at both ends of the heat spot portion, so that even at the boundary portion between the heat spot portion and the core wire at the time of forming the heat spot portion, Stress concentration is less likely to occur, and it is possible to prevent the core wire from being cut at the boundary between the heat spot portion and the core wire, thereby further improving the product yield.
- FIG. 1 is a perspective view of an electric wire fuse according to an embodiment of the present invention.
- FIG. 2 is a side view of the electric wire fuse shown in FIG.
- FIG. 3 is a plan view of the electric wire fuse shown in FIG. 4 is a cross-sectional view taken along the line CC of FIG.
- FIG. 5 is a perspective view of the core wire arranged at the thermoforming position.
- 6 is a cross-sectional view taken along the line DD of FIG. 7 is a cross-sectional view taken along the line EE of FIG.
- FIG. 8 is a perspective view showing a state at the time of heat forming the core wire in one embodiment.
- FIG. 9 is a perspective view of a heat spot portion and a recess portion of one embodiment formed by thermoforming.
- FIG. 9 is a perspective view of a heat spot portion and a recess portion of one embodiment formed by thermoforming.
- FIG. 10 is an enlarged view of a portion F in FIG. 11 is a cross-sectional view taken along the line GG in FIG.
- FIG. 12 is a perspective view of a conventional electric wire fuse.
- 13 is a cross-sectional view taken along the line AA in FIG.
- FIG. 14 is an enlarged view of a portion B in FIG.
- the electric wire fuse 1 includes a core wire 10 that is a fusible member, a heat spot portion 20, a recess portion 30, and a low melting point metal 40. ing.
- the core wire 10 is a bare conductor (conductor not covered with an insulation coating) used for the electric wire, and is connected in series to a circuit to be protected by connection terminals 200 provided at both ends.
- the core wire 10 is finished in a circular cross section having a predetermined outer diameter as shown in FIG. 6 by twisting a plurality of copper wires.
- the heat spot part 20 is a part where a part of the core wire 10 is formed by thermoforming into a rod shape having a circular cross section having a smaller cross-sectional area than other parts.
- the heat forming for forming the heat spot portion 20 is performed on the core wire 10 to which the connection terminals 200 are connected at both ends.
- thermoforming dies 51 and 52 sandwiching the core wire 10 as shown in FIG.
- the pair of thermoforming dies 51 and 52 are molding dies that are heated to a predetermined heating temperature suitable for thermoforming the core wire 10 when energized.
- the pair of thermoforming dies 51 and 52 have pressure forming surfaces 51a and 52a that press against the outer periphery of the core wire 10, as shown in FIG.
- the pressure molding surfaces 51 a and 52 a are molding surfaces having a semicircular cross section, and are formed on a semi-cylindrical surface having an inner diameter that is an outer diameter of the heat spot portion 20. Further, a depression forming projection 52 b is provided on the pressure molding surface 51 a of one thermoforming mold 52.
- the depression forming protrusion 52 b bites into the surface (outer peripheral surface) of the heat spot portion 20 when the pressure molding surfaces 51 a and 52 a compress the core wire 10 to form the heat spot portion 20.
- the recess 30 is formed. That is, in the electric wire fuse 1 of the present embodiment, the heat spot portion 20 is heat-formed into a rod shape having a circular cross section, and the recess portion 30 is formed at the same time when the heat spot portion 20 is heat-formed into a rod shape having a circular cross section.
- the hollow portion 30 is a void formed by being recessed in the outer peripheral surface of the heat spot portion 20.
- the pair of thermoforming dies 51, 52 forms the tapered portions 21 at both ends of the heat spot portion 20 (parts that are boundaries with the core wire 10).
- the tapered portion 21 is a tapered structure that is concentric with the core wire 10 and has an outer diameter that gradually changes from the outer peripheral surface of the core wire 10 to the outer peripheral surface of the heat spot portion 20.
- the low melting point metal 40 is disposed in the recess 30 by melting a metal chip having a melting point lower than that of the core wire 10 with heat.
- the low melting point metal 40 is disposed in the recess 30 so as to be melted by the heat generated by the heat spot 20 when a rated current flows through the core wire 10.
- the low melting point metal 40 is provided to adjust the fusing time of the heat spot portion 20.
- the electric wire fuse 1 of this embodiment protects the circuit to which the electric wire fuse 1 is connected by melting the heat spot portion 20 due to melting of the low melting point metal 40 when a current exceeding the rating flows through the core wire 10. .
- the heat spot portion 20 is formed in a rod shape having a circular cross section, so that there is no corner portion where stress concentration is likely to occur during heat forming. Therefore, it is possible to prevent the core wire 10 from being cut by the load of the thermoforming dies 51 and 52 that acts when the heat spot portion 20 is molded, and to improve the product yield.
- the recessed portion 30 is formed at the same time when the heat spot portion 20 is formed by heating, the number of processing steps can be reduced and productivity can be improved.
- the taper portions 21 concentric with the core wire 10 are formed at both ends of the heat spot portion 20, so that the heat spot portion 20 is formed when the heat spot portion 20 is formed. Stress concentration is less likely to occur at the boundary between the core wire 10 and the core wire 10, and it is possible to prevent the core wire 10 from being cut at the boundary between the heat spot portion 20 and the core wire 10, thereby further improving the product yield. .
- connection terminals 200 connected to both ends of the core wire 10 are not limited to the connection terminals (LA terminals) for screwing, and tab terminals that can be fitted and connected to the circuit side can also be adopted.
- the heat spot part (20) formed into a rod shape having a circular cross section with a smaller cross-sectional area than other parts, and the outer periphery of the heat spot part (20) simultaneously when the heat spot part (20) is thermoformed
- the outer diameter gradually increases from the outer peripheral surface of the core wire (10) to the outer peripheral surface of the heat spot portion (20), concentrically with the core wire (10).
- the electric wire fuse (1) according to the above [1], wherein the taper portion (21) that changes is formed.
- the heat spot portion is formed into a rod shape having a circular cross section, so that there is no corner portion where stress concentration is likely to occur during heat forming. Therefore, it can suppress that a core wire is cut
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fuses (AREA)
Abstract
Description
(1) 両端に装備された接続端子によって保護対象の回路に直列に接続される芯線と、該芯線の一部を熱成形型による加熱成形によって他の部位よりも断面積が小さな円形断面を有する棒状に成形されたヒートスポット部と、該ヒートスポット部が加熱成形される時に同時に前記ヒートスポット部の外周面に凹んで形成された窪み部と、定格電流が流れた時の前記ヒートスポット部の発熱によって溶融するように前記窪み部に配置された低融点金属と、を備えて、前記芯線に定格以上の電流が流れた時に前記ヒートスポット部が溶断する電線ヒューズ。
20 ヒートスポット部
21 テーパ部
30 窪み部
40 低融点金属
200 接続端子
Claims (2)
- 両端に装備された接続端子によって保護対象の回路に直列に接続される芯線と、
該芯線の一部を熱成形型による加熱成形によって他の部位よりも断面積が小さな円形断面を有する棒状に成形されたヒートスポット部と、
該ヒートスポット部が加熱成形される時に同時に前記ヒートスポット部の外周面に凹んで形成された窪み部と、
定格電流が流れた時の前記ヒートスポット部の発熱によって溶融するように前記窪み部に配置された低融点金属と、を備えて、
前記芯線に定格以上の電流が流れた時に前記ヒートスポット部が溶断する電線ヒューズ。 - 前記ヒートスポット部の両端部には、前記芯線と同心で、且つ前記芯線の外周面からヒートスポット部の外周面まで外径が徐々に変化するテーパ部が形成される請求項1に記載の電線ヒューズ。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112015006314A BR112015006314A2 (pt) | 2012-10-17 | 2013-09-26 | fusível de fio elétrico |
CN201380048421.5A CN104641443A (zh) | 2012-10-17 | 2013-09-26 | 电线熔丝 |
KR20157007206A KR20150046243A (ko) | 2012-10-17 | 2013-09-26 | 전선 퓨즈 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012-230111 | 2012-10-17 | ||
JP2012230111A JP5986878B2 (ja) | 2012-10-17 | 2012-10-17 | 電線ヒューズ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014061418A1 true WO2014061418A1 (ja) | 2014-04-24 |
Family
ID=50487991
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/076090 WO2014061418A1 (ja) | 2012-10-17 | 2013-09-26 | 電線ヒューズ |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP5986878B2 (ja) |
KR (1) | KR20150046243A (ja) |
CN (1) | CN104641443A (ja) |
BR (1) | BR112015006314A2 (ja) |
WO (1) | WO2014061418A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102442331B1 (ko) | 2018-05-25 | 2022-09-08 | 주식회사 엘지에너지솔루션 | 다단형 퓨즈 모듈 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08111163A (ja) * | 1994-10-07 | 1996-04-30 | Yazaki Corp | ヒューズおよびその製造方法 |
JP2011181445A (ja) * | 2010-03-03 | 2011-09-15 | Yazaki Corp | ヒューズ及びヒューズの製造方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB775977A (en) * | 1953-04-13 | 1957-05-29 | Brush Electrical Eng | Improvements in fusible elements for cartridge fuse-links for electrical circuits |
JP2796294B2 (ja) * | 1987-06-24 | 1998-09-10 | 株式会社日立製作所 | 過負荷保護装置 |
JP3165713B2 (ja) * | 1991-09-11 | 2001-05-14 | 日本高圧電気株式会社 | ヒュ−ズ素子 |
-
2012
- 2012-10-17 JP JP2012230111A patent/JP5986878B2/ja active Active
-
2013
- 2013-09-26 WO PCT/JP2013/076090 patent/WO2014061418A1/ja active Application Filing
- 2013-09-26 CN CN201380048421.5A patent/CN104641443A/zh active Pending
- 2013-09-26 KR KR20157007206A patent/KR20150046243A/ko not_active Application Discontinuation
- 2013-09-26 BR BR112015006314A patent/BR112015006314A2/pt not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08111163A (ja) * | 1994-10-07 | 1996-04-30 | Yazaki Corp | ヒューズおよびその製造方法 |
JP2011181445A (ja) * | 2010-03-03 | 2011-09-15 | Yazaki Corp | ヒューズ及びヒューズの製造方法 |
Also Published As
Publication number | Publication date |
---|---|
CN104641443A (zh) | 2015-05-20 |
BR112015006314A2 (pt) | 2017-07-04 |
JP2014082128A (ja) | 2014-05-08 |
KR20150046243A (ko) | 2015-04-29 |
JP5986878B2 (ja) | 2016-09-06 |
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