WO2021167379A1 - Resistor with integrated fuse - Google Patents

Resistor with integrated fuse Download PDF

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Publication number
WO2021167379A1
WO2021167379A1 PCT/KR2021/002082 KR2021002082W WO2021167379A1 WO 2021167379 A1 WO2021167379 A1 WO 2021167379A1 KR 2021002082 W KR2021002082 W KR 2021002082W WO 2021167379 A1 WO2021167379 A1 WO 2021167379A1
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WO
WIPO (PCT)
Prior art keywords
ceramic tube
fuse
lead wire
metal end
end cover
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PCT/KR2021/002082
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French (fr)
Korean (ko)
Inventor
권오철
차진우
Original Assignee
주식회사 케이포스
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Application filed by 주식회사 케이포스 filed Critical 주식회사 케이포스
Publication of WO2021167379A1 publication Critical patent/WO2021167379A1/en

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    • 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

Definitions

  • the present invention relates to a fuse-integrated resistor in which a temperature-sensitive fuse and a resistor are provided as one component.
  • FIG. 1 attached to this specification corresponds to FIG. 1 of the above Korean utility model registration application.
  • 1 shows a fuse-integrated resistor 200, and its components are as follows.
  • Reference numeral 202 denotes a first lead wire, 20 a fuse, 204 a second lead wire, 206 a first curved part, 208 a second curved part, 10 a ceramic tube, 30 a resistance wire, 40 a first metal end cover, 50 Silver is a second metal end cover, 402 is an external lead wire, 60 is a package cover, 102 is a filler.
  • a first metal end cover 40 and a second metal end cover 50 are mounted at the ends of the ceramic tube 10 of a closed and open type on one side, respectively, the first metal end
  • the cover 40 is a closed cover and the second metal end cover 50 is an open cover.
  • a fuse 20 is inserted into the ceramic tube 10 .
  • a first lead wire 202 is connected to the fuse 20 , and the first lead wire 202 is an open second metal end cover 50 .
  • extended outward through A second lead wire 204 is connected to the other side of the fuse 20 , and the second lead wire 204 is connected to two parts of the first curved portion 206 and the second curved portion 208 inside the ceramic tube 10 . It is curved in place and electrically connected to the outer surface of the second metal end cover 50 .
  • a resistance wire 30 is connected to the second metal end cover 50 , and the resistance wire 30 is wound on the outside of the ceramic tube 10 and electrically connected to the first metal end cover 40 .
  • An external lead wire 402 is connected to the first metal end cover 40 .
  • the integrated resistor 200 performs a function as a resistor, and heat generated by the resistance is transmitted to the inside of the ceramic tube 10, and when the heat exceeds a predetermined level, the fuse 20 is blown. do.
  • the present inventor has discovered a problem related to the arrangement of the fuse 20 inside the ceramic tube 10 in the integrated resistor of the structure shown in FIG. 1 and described above.
  • the fuse 20 since the second lead wire 204 connected to the fuse 20 is electrically connected to the second metal end cover 50 while being bent at two places 206 and 208 , the fuse 20 ) is arranged biased to one side inside the ceramic tube (10). That is, in the cross-sectional view of FIG. 1 , the second lead wire 204 is present between the upper wall of the ceramic tube 10 and the fuse 20 , whereas no lead wire is present between the lower wall of the ceramic tube 10 and the fuse 20 . There is an asymmetry in the placement of the fuse 20 inside the ceramic tube 10 , where this does not exist.
  • the fuse 20 is biased downward in the integrated resistor disposed on the left side of the PCB, and the fuse 20 is biased upward in the integrated resistor disposed at the right side on the PCB.
  • the fuse 20 of the integrated resistor disposed on the left receives relatively more heat than the fuse 20 of the integrated resistor disposed on the right. and it may be disconnected sooner than the desired time during design.
  • FIG. 3 is an actual product photograph of the fuse-integrated resistor shown in FIG. 1 .
  • a portion marked with a circle in the photo of FIG. 3 is a welding portion. This welding is being performed after setting the welding point by contacting the second lead wire 204 to any point on the outer surface of the second metal end cover 50 after the second bending of the second lead wire 204 . .
  • this method has the following problems.
  • An object of the present invention is to solve a problem in which disconnection occurs earlier or later than a desired time point during design by improving the asymmetry of the arrangement of fuses in the prior art.
  • Another object of the present invention is to reduce the size of the entire component, that is, the fuse-integrated resistor, through miniaturization of the ceramic tube.
  • a fuse-integrated resistor includes a hollow ceramic tube, a resistance wire wound on the ceramic tube, and a closed type that is installed at both ends of the ceramic tube and interconnected by the resistance wire a first metal end cover and an open second metal end cover, an external lead wire connected to the first metal end cover, and a fuse installed inside the ceramic tube and including a first lead wire and a second lead wire do.
  • the first lead wire is connected to the outside through the second metal end cover.
  • the second lead wire is curved in the extending direction of the first lead wire inside the ceramic tube to extend to the second metal end cover and is electrically connected to the second metal end cover without a secondary curve.
  • a groove is formed in the inner surface of the ceramic tube in a longitudinal direction, and the second lead wire is inserted into the groove.
  • the fuse is a thermal fuse, and is located substantially at the center of the inner space of the ceramic tube in the state of being inserted into the ceramic tube, whereby heat transferred to the fuse through the ceramic tube is deflected into the ceramic tube of the fuse. Not affected by location.
  • an additional configuration may be further included in the fuse-integrated resistor according to an embodiment of the present invention.
  • the size of the entire component that is, the fuse-integrated resistor, can be miniaturized through miniaturization of the ceramic tube.
  • FIG. 1 is a view showing the structure of a conventional fuse-integrated resistor.
  • FIG. 2 is a view illustrating a state in which a conventional fuse-integrated resistor is disposed on a PCB, and is a view for explaining asymmetry of the fuse arrangement.
  • FIG. 3 is a photograph of a state in which a second lead wire extending from a fuse disposed inside a ceramic tube is soldered onto a metal end cover in a prior art integrated resistor.
  • FIG. 4 is a diagram illustrating structural features of a fuse-integrated resistor according to an embodiment of the present invention.
  • FIG. 5 is a diagram illustrating a state in which a second lead wire is inserted into a groove formed in a ceramic tube in the fuse-integrated resistor according to an embodiment of the present invention in comparison with the prior art.
  • FIG. 6 is a cross-sectional view of a fuse-integrated resistor according to an embodiment of the present invention, and is a view showing features of the present invention in contrast to the cross-sectional view of the prior art of FIG. 1 .
  • FIG. 7 is a view showing a portion where a second lead wire is welded in the fuse-integrated resistor according to an embodiment of the present invention.
  • FIG. 8 is a photograph showing a state in which a second lead wire is welded in a prototype product according to an embodiment of the present invention.
  • FIG. 4 is a diagram illustrating structural features of a fuse-integrated resistor according to an embodiment of the present invention.
  • reference numerals 10, 40, and 50 are also used in the same manner in FIG. 1 for describing the prior art.
  • reference numeral 10 denotes a ceramic tube
  • 40 denotes a first metal end cover
  • 50 denotes a second metal end cover.
  • a characteristic of the present invention compared to the prior art that can be clearly seen from FIG. 4 is that the groove 11 is formed in the ceramic tube 10 in the longitudinal direction.
  • the second lead wire 204 is inserted into the groove 11 .
  • the state in which the fuse 20 is inserted into the ceramic tube 10 is not shown in FIG. 4 , anyone skilled in the art can insert the second lead wire 204 into the groove ( 11), the positional relationship between the ceramic tube 10 , the fuse 20 , and the second lead wire 204 can be understood.
  • FIG. 5 is a view illustrating a state in which a second lead wire is inserted into a groove formed in a ceramic tube in the fuse-integrated resistor according to an embodiment of the present invention in comparison with the prior art, through which the understanding of the positional relationship is more clear will be done
  • FIG. 5 is a lateral cross-sectional view of the ceramic tube 10 in which the fuse 20 and the second lead wire 204 connected to the fuse 20 are disposed. Illustration of the remaining components has been omitted.
  • the second lead wire 204 that extends from the fuse 20 and is primarily curved occupies the inner space of the ceramic tube 10 .
  • the second lead wire 204 occupied a space together with the fuse 20 . Due to this, an empty space not occupied by the fuse 20 or the second lead wire 204 is relatively large inside the ceramic tube 10 .
  • the second lead wire 204 is inserted into the groove 11 of the ceramic tube 10 as shown in FIG.
  • the second lead wire 204 does not occupy the inner space of the ceramic tube 10 or the degree of occupying the inner space of the ceramic tube 10 can be minimized, so that the inner space of the ceramic tube 10 is almost mostly used for the fuse 20 . ) can be occupied by It is clear that the size of the ceramic tube 10 can be reduced compared to the structure of the prior art even when the same fuse 20 and the second lead wire 204 are used thanks to the presence of the groove 11 .
  • the package cover may be made of, for example, a mixture of an epoxy resin and a silicone polymer.
  • the cover can tightly wrap the ceramic tube 10 and the metal end covers 40 and 50 on which the resistance wire 30 is wound while being deformed by applying heat.
  • the miniaturized ceramic tube 10 when an external package cover having an increased thickness is used on the miniaturized ceramic tube 10 , it is possible to provide a fuse-integrated resistor having the same size and improved heating performance.
  • the fuse-integrated resistor acts as a heating element when mounted together with other components on the PCB. In order to pass the quality test, the level of heat generation must be suppressed.
  • the thermal insulation performance of the resistor is improved, so that a better level of heat suppression is possible while maintaining the same size of the entire component. becomes
  • the fuse 20 can be positioned at the center of the ceramic tube 10 having a reduced size. This central positioning of the fuse 20 makes it possible to solve the problem caused by the asymmetry of the arrangement of the fuses of the prior art described with reference to FIG. 2 .
  • FIG. 6 The structure of the fuse-integrated resistor according to the embodiment of the present invention shown in FIG. 6 is compared with the structure of the prior art shown in FIG. 1 , thereby clearly revealing the characteristics of the present invention.
  • a first metal end cover 40 and a second metal end cover 50 are respectively mounted at the ends of the ceramic tube 10 in the form of one closed and the other open, the first metal end cover 40 is a closed cover, and the second metal end cover 50 is an open cover.
  • a fuse 20 is inserted into the ceramic tube 10 .
  • a first lead wire is connected to the fuse 20 , and the first lead wire extends to the outside through the open second metal end cover 50 .
  • a second lead wire 204 is connected to the other side of the fuse 20 , and the second lead wire 204 is bent once inside the ceramic tube 10 .
  • the second lead wire 204 bent once is inserted into the groove 11 formed in the longitudinal direction of the ceramic tube 10 , and extends to the second metal end cover 50 in this inserted state.
  • the second lead wire 204 is electrically connected to the second metal end cover 50 by being electrically welded to the second metal end cover 50 without secondary bending as in the prior art of FIG. 1 .
  • a resistance wire is connected to the second metal end cover 50 , and the resistance wire is wound on the outside of the ceramic tube 10 and electrically connected to the first metal end cover 40 .
  • An external lead wire is connected to the first metal end cover 40 .
  • the package cover 60 may be formed of various synthetic resin materials, for example, may be made of a mixture of an epoxy resin and a silicone polymer.
  • the inside of the ceramic tube 10 may be filled with a filler. As the filler, silicone is preferably used.
  • the groove 11 of the ceramic tube 10 is formed.
  • the groove 11 is formed, but in the prior art, the groove is not formed.
  • the second lead wire 204 is inserted into the groove 11 of the ceramic tube 10 .
  • the second lead wire 204 is inserted into the groove 11 formed in the ceramic tube 10, but in the prior art, since there is no groove in the ceramic tube 10, the second lead wire 204 is inserted into this groove. It is not an embedded structure.
  • the second lead wire 204 is bent twice. In the prior art, it is bent twice, but in the present invention, it is the same up to the embodiment of the first bend, but after the first bend, the second lead wire 204 is bent again to contact the outer surface of the second metal end cover 50. and is welded at the point of contact with the inner surface of the second metal end cover 50 . Such a welding structure will be described in more detail with reference to FIGS. 7 and 8 .
  • FIG. 7 is a view showing a portion where a second lead wire is welded in the fuse-integrated resistor according to an embodiment of the present invention.
  • the second lead wire 204 (not shown) extends from the fuse 20 and is first curved in the direction of the first lead wire 202 from the side facing the first metal end cover 40 to form the ceramic tube 10 . It extends toward the second metal end cover 50 in a state inserted into the groove 11 .
  • the second metal end cover 50 is formed to protrude slightly forward than the ceramic tube 10 , unlike the embodiment shown in FIG. 6 .
  • the second lead wire 204 extending to the second metal end cover 50 comes into contact with the inner surface of the second metal end cover 50, and at this contact point, there is no secondary bending as in the prior art. This can be done. Since the contact point is formed between the end of the ceramic tube 10 and the end of the second metal end cover 50 , the welding point does not protrude outward. This point can be confirmed through FIG. 7 .
  • FIG 8 is a photograph confirming a state in which the second lead wire 204 is welded in a prototype product according to an embodiment of the present invention.
  • a portion marked with a circle in the photo of FIG. 8 is a welding portion. Since this welding is made at the inner contact portion with the second metal end cover 50 without the secondary bending of the second lead wire 204, the second metal end cover 50 after performing the secondary bending in order to perform welding. It is advantageous compared to the prior art in that it can omit the cumbersome process of positioning the welding point on the outer surface of the . In this welding process, the second lead wire 204 can be cut together, which is connected with an additional advantage of eliminating the lead wire cutting process. The fact that the secondary bending process for welding and the lead wire cutting process can be eliminated can lead to improved productivity. In addition, since the welding point is clearly specified, the possibility of occurrence of deviation of the welding point is greatly reduced compared to the prior art.

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Abstract

A resistor with an integrated fuse according to an embodiment of the present invention comprises: a ceramic tube having a hollow shape; a resistance wire wound on the ceramic tube; a closed first metal end cover and an open second metal end cover installed at the opposite ends of the ceramic tube respectively and connected to each other by the resistance wire; an external lead wire connected to the first metal end cover; and a fuse installed inside the ceramic tube and including a first lead wire and a second lead wire.

Description

퓨즈 일체형 저항기Fuse Integrated Resistor
본 발명은 온도 감응형 퓨즈와 저항기가 하나의 부품으로 제공되는 퓨즈 일체형 저항기에 관한 것이다.The present invention relates to a fuse-integrated resistor in which a temperature-sensitive fuse and a resistor are provided as one component.
본 발명의 배경기술로서 한국 실용신안등록출원 제20-2016-0005229호(발명의 명칭: 일체형 저항기)에 개시된 기술을 언급하기로 한다.As a background technology of the present invention, the technology disclosed in Korean Utility Model Registration Application No. 20-2016-0005229 (Title of the Invention: Integrated Resistor) will be referred to.
본 명세서에 첨부된 도 1은 위 한국 실용신안등록출원의 도 1에 상응한다. 도 1은 퓨즈 일체형 저항기(200)를 도시하며, 그 구성요소는 다음과 같다. 도면부호 202는 제1 리드 선, 20은 퓨즈, 204는 제2 리드 선, 206은 제1 만곡부, 208은 제2 만곡부, 10은 세라믹 튜브, 30은 저항선, 40은 제1 금속 단부 커버, 50은 제2 금속 단부 커버, 402는 외부 리드 선, 60은 패키지 커버, 102는 충진재이다.FIG. 1 attached to this specification corresponds to FIG. 1 of the above Korean utility model registration application. 1 shows a fuse-integrated resistor 200, and its components are as follows. Reference numeral 202 denotes a first lead wire, 20 a fuse, 204 a second lead wire, 206 a first curved part, 208 a second curved part, 10 a ceramic tube, 30 a resistance wire, 40 a first metal end cover, 50 Silver is a second metal end cover, 402 is an external lead wire, 60 is a package cover, 102 is a filler.
전체적인 구조를 보면, 한쪽은 폐쇄되고 다른 쪽은 개방된 형태의 세라믹 튜브(10)의 단부에 각각 제1 금속 단부 커버(40)와 제2 금속 단부 커버(50)가 장착되는데, 제1 금속 단부 커버(40)는 폐쇄형 커버이고, 제2 금속 단부 커버(50)는 개방형 커버이다. 세라믹 튜브(10) 내부에 퓨즈(20)가 삽입되는데, 퓨즈(20)로는 제1 리드 선(202)이 연결되고, 이 제1 리드 선(202)은 개방된 제2 금속 단부 커버(50)를 통하여 외부로 연장된다. 퓨즈(20)의 다른 쪽에는 제2 리드 선(204)이 연결되고, 이 제2 리드 선(204)은 세라믹 튜브(10) 내부에서 제1 만곡부(206)와 제2 만곡부(208)의 두 곳에서 만곡되면서 제2 금속 단부 커버(50)의 외부 표면에 전기적으로 연결된다. 제2 금속 단부 커버(50)에는 저항선(30)이 연결되고, 이 저항선(30)은 세라믹 튜브(10)의 외부에 권선되고 제1 금속 단부 커버(40)에 전기적으로 연결된다. 제1 금속 단부 커버(40)에는 외부 리드 선(402)이 연결된다. 이렇게 마련되는 저항기 반제품을 패키지 커버(60)에 내장하고 외부 리드 선(402) 및 제1 리드 선(202)은 각각 패키지 커버(60) 외부로 연장시키면 저항기 완제품이 완성된다. 패키지 커버(60)는 다양한 합성 수지 재료로 형성 가능하며, 예컨대 에폭시 수지와 실리콘 폴리머의 혼합물로 제조될 수 있다. 또한, 도 1에서 도면부호 102에 의하여 지시되는 것은 세라믹 튜브(10) 내부의 충진재인데, 이산화규소부 등이 충진재로 사용될 수 있다.Looking at the overall structure, a first metal end cover 40 and a second metal end cover 50 are mounted at the ends of the ceramic tube 10 of a closed and open type on one side, respectively, the first metal end The cover 40 is a closed cover and the second metal end cover 50 is an open cover. A fuse 20 is inserted into the ceramic tube 10 . A first lead wire 202 is connected to the fuse 20 , and the first lead wire 202 is an open second metal end cover 50 . extended outward through A second lead wire 204 is connected to the other side of the fuse 20 , and the second lead wire 204 is connected to two parts of the first curved portion 206 and the second curved portion 208 inside the ceramic tube 10 . It is curved in place and electrically connected to the outer surface of the second metal end cover 50 . A resistance wire 30 is connected to the second metal end cover 50 , and the resistance wire 30 is wound on the outside of the ceramic tube 10 and electrically connected to the first metal end cover 40 . An external lead wire 402 is connected to the first metal end cover 40 . When the resistor semi-finished product thus prepared is embedded in the package cover 60 , and the external lead wire 402 and the first lead wire 202 are respectively extended to the outside of the package cover 60 , the resistor finished product is completed. The package cover 60 may be formed of various synthetic resin materials, for example, may be made of a mixture of an epoxy resin and a silicone polymer. In addition, as indicated by reference numeral 102 in FIG. 1 is a filler inside the ceramic tube 10, silicon dioxide or the like may be used as the filler.
상술한 바와 같은 구조에 의하여 일체형 저항기(200)는 저항기로서의 기능을 수행하면서 저항에 의해 발생된 열이 세라믹 튜브(10) 내부로 전해지고, 이 열이 소정 수준을 넘어서게 되면 퓨즈(20)가 끊어지게 된다.According to the structure as described above, the integrated resistor 200 performs a function as a resistor, and heat generated by the resistance is transmitted to the inside of the ceramic tube 10, and when the heat exceeds a predetermined level, the fuse 20 is blown. do.
그런데, 본 발명자는 도 1에 도시되고 위에 설명된 구조의 일체형 저항기에 있어서 세라믹 튜브(10) 내부에서 퓨즈(20)의 배치와 관련한 문제점을 발견하였다. 도 1로부터 명백히 확인 가능하듯이, 퓨즈(20)에 연결되는 제2 리드선(204)이 두 곳(206, 208)에서 만곡되면서 제2 금속 단부 커버(50)에 전기적으로 연결되므로, 퓨즈(20)는 세라믹 튜브(10) 내부에서 한쪽으로 치우치게 배치된다. 즉, 도 1의 단면도에서 세라믹 튜브(10)의 위쪽 벽과 퓨즈(20) 사이에는 제2 리드선(204)이 존재하는 반면, 세라믹 튜브(10)의 아래쪽 벽과 퓨즈(20) 사이에는 아무런 리드선이 존재하지 않는, 세라믹 튜브(10) 내부에서의 퓨즈(20)의 배치에 있어서 비대칭성이 존재한다.However, the present inventor has discovered a problem related to the arrangement of the fuse 20 inside the ceramic tube 10 in the integrated resistor of the structure shown in FIG. 1 and described above. As can be clearly seen from FIG. 1 , since the second lead wire 204 connected to the fuse 20 is electrically connected to the second metal end cover 50 while being bent at two places 206 and 208 , the fuse 20 ) is arranged biased to one side inside the ceramic tube (10). That is, in the cross-sectional view of FIG. 1 , the second lead wire 204 is present between the upper wall of the ceramic tube 10 and the fuse 20 , whereas no lead wire is present between the lower wall of the ceramic tube 10 and the fuse 20 . There is an asymmetry in the placement of the fuse 20 inside the ceramic tube 10 , where this does not exist.
도 2를 참조하면, 이러한 비대칭적 퓨즈의 배치의 문제를 보다 쉽게 파악할 수 있다. 도 2에서 PCB 상 좌측에 배치된 일체형 저항기에서는 퓨즈(20)가 아래쪽으로 치우쳐 있으며, PCB 상 우측에 배치된 일체형 저항기에서는 퓨즈(20)가 위쪽으로 치우쳐 있다. 이러한 상황에서는, 예컨대 PCB 기판 표면에 열 발생 원인이 존재한다고 할 때, 좌측에 배치된 일체형 저항기의 퓨즈(20)는 우측에 배치된 일체형 저항기의 퓨즈(20)에 비하여 상대적으로 더 많은 열을 받게 될 것이며, 설계 시 원하는 시점보다 빨리 단선될 수 있다.Referring to FIG. 2 , the problem of disposition of such asymmetric fuses can be more easily understood. In FIG. 2 , the fuse 20 is biased downward in the integrated resistor disposed on the left side of the PCB, and the fuse 20 is biased upward in the integrated resistor disposed at the right side on the PCB. In such a situation, for example, when a heat generating cause exists on the surface of the PCB substrate, the fuse 20 of the integrated resistor disposed on the left receives relatively more heat than the fuse 20 of the integrated resistor disposed on the right. and it may be disconnected sooner than the desired time during design.
또한, 본 발명자는 도 1에 도시된 바와 같은 구조의 퓨즈 일체형 저항기의 또 다른 문제점을 인식하였다. 이는 제2 리드 선(204)의 제2 금속 단부 커버(50)로의 용접과 관련된다. 도 1에 도시된 바와 같이, 제2 리드 선(204)은 두번째로 만곡된 상태에서 제2 금속 단부 커버(50)의 외부 표면과 접하고, 이 상태에서 용접된다. 도 3은 도 1에 도시된 퓨즈 일체형 저항기의 실제 제품 사진이다.In addition, the present inventors have recognized another problem of the fuse-integrated resistor having the structure shown in FIG. 1 . This involves welding the second lead wire 204 to the second metal end cover 50 . As shown in Fig. 1, the second lead wire 204 is in contact with the outer surface of the second metal end cover 50 in the second curved state, and is welded in this state. FIG. 3 is an actual product photograph of the fuse-integrated resistor shown in FIG. 1 .
도 3의 사진에서 원형으로 표시된 부위가 용접 부위이다. 이러한 용접은 제2 리드 선(204)의 2차 만곡 후 제2 금속 단부 커버(50)의 외부 표면 상의 임의의 지점에 제2 리드 선(204)를 접촉시켜서 용접 지점을 설정한 후 실행되고 있다. 그런데, 이러한 방식에는 다음의 문제점이 있다.A portion marked with a circle in the photo of FIG. 3 is a welding portion. This welding is being performed after setting the welding point by contacting the second lead wire 204 to any point on the outer surface of the second metal end cover 50 after the second bending of the second lead wire 204 . . However, this method has the following problems.
먼저, 용접을 실시하기 위하여 2차 만곡을 실시한 후 제2 금속 단부 커버(50)의 외부 표면 상의 용접 지점으로 자리를 잡는 과정이 번거로웠다. 이러한 공정을 제거한다면 생산성 향상에 도움이 될 것이다. 또한, 용접 지점이 제2 금속 단부 커버(50)의 외부 표면 상의 임의의 지점이 되므로 용접의 실시 과정에서 편차의 발생이 비교적 빈번하게 이루어졌다. 구조 상 하나의 지점으로 특정되는 지점에 용접을 실시하는 것이 보다 유리할 것으로 생각되었다.First, it was cumbersome to perform a second bending to perform welding and then to position the welding point on the outer surface of the second metal end cover 50 . Eliminating these processes will help improve productivity. In addition, since the welding point is an arbitrary point on the outer surface of the second metal end cover 50, the occurrence of deviation in the course of welding is relatively frequent. It was thought that it would be more advantageous to perform welding at a point specified by a single point on the structure.
나아가, 도 1에 도시된 바와 같은 구조의 일체형 저항기에서는 만곡된 제2 리드선(204)이 퓨즈(20)와 세라믹 튜브(10)의 내벽 사이에 존재하기 때문에 세라믹 튜브(10)의 내경을 퓨즈(20)의 사이즈에 꼭 맞게 소형화 하는데 한계가 있었다.Furthermore, in the integrated resistor having the structure as shown in FIG. 1, since the curved second lead wire 204 exists between the fuse 20 and the inner wall of the ceramic tube 10, the inner diameter of the ceramic tube 10 is reduced to the fuse ( There was a limit to downsizing to fit the size of 20).
본 발명의 목적은 상술한 종래기술의 퓨즈 배치의 비대칭성을 개선함으로써 설계 시 원하는 시점보다 빨리 또는 늦게 단선이 이루어지는 문제점을 해결하는 것이다.SUMMARY OF THE INVENTION An object of the present invention is to solve a problem in which disconnection occurs earlier or later than a desired time point during design by improving the asymmetry of the arrangement of fuses in the prior art.
또한, 본 발명의 목적은 제2 리드 선(204)의 2차 만곡 공정을 제거하여 생산성을 향상시키고 제2 리드 선(204)의 제2 금속 단부 커버(50)로의 용접 방식을 개선하는 것이다.It is also an object of the present invention to improve productivity by eliminating the secondary bending process of the second lead wire 204 and to improve the welding method of the second lead wire 204 to the second metal end cover 50 .
또한, 본 발명의 목적은 세라믹 튜브의 소형화를 통해서 전체 부품, 즉 퓨즈 일체형 저항기 완제품 사이즈를 소형화 하는 것이다.Another object of the present invention is to reduce the size of the entire component, that is, the fuse-integrated resistor, through miniaturization of the ceramic tube.
본 발명의 일 실시예에 따른 퓨즈 일체형 저항기는, 중공 형상의 세라믹 튜브와, 상기 세라믹 튜브 상에 권선되는 저항선과, 상기 세라믹 튜브의 양 단부에 각각 설치되고, 상기 저항선에 의해 상호 연결되는 폐쇄형 제1 금속 단부 커버 및 개방형 제2 금속 단부 커버와, 상기 제1 금속 단부 커버에 연결되는 외부 리드 선과, 상기 세라믹 튜브의 내부에 설치되고, 제1 리드 선과 제2 리드 선을 포함하는 퓨즈를 포함한다. 상기 제1 리드 선은 상기 제2 금속 단부 커버를 통하여 외부로 연결된다. 상기 제2 리드 선은 상기 세라믹 튜브 내부에서 상기 제1 리드 선의 연장 방향으로 만곡되어 상기 제2 금속 단부 커버까지 연장하고 2차 만곡 없이 상기 제2 금속 단부 커버와 전기적으로 연결된다. 상기 세라믹 튜브의 내면에는 길이 방향으로 홈이 형성되고, 상기 제2 리드 선은 상기 홈에 삽입된다. 상기 퓨즈는 온도 퓨즈이고, 상기 세라믹 튜브 내부로의 삽입 상태에서 상기 세라믹 튜브의 내부 공간의 실질적으로 중앙에 위치하고, 이로써 상기 세라믹 튜브를 통해 상기 퓨즈에 전달되는 열이 상기 퓨즈의 상기 세라믹 튜브 내 편향된 위치에 따른 영향을 받지 않는다.A fuse-integrated resistor according to an embodiment of the present invention includes a hollow ceramic tube, a resistance wire wound on the ceramic tube, and a closed type that is installed at both ends of the ceramic tube and interconnected by the resistance wire a first metal end cover and an open second metal end cover, an external lead wire connected to the first metal end cover, and a fuse installed inside the ceramic tube and including a first lead wire and a second lead wire do. The first lead wire is connected to the outside through the second metal end cover. The second lead wire is curved in the extending direction of the first lead wire inside the ceramic tube to extend to the second metal end cover and is electrically connected to the second metal end cover without a secondary curve. A groove is formed in the inner surface of the ceramic tube in a longitudinal direction, and the second lead wire is inserted into the groove. The fuse is a thermal fuse, and is located substantially at the center of the inner space of the ceramic tube in the state of being inserted into the ceramic tube, whereby heat transferred to the fuse through the ceramic tube is deflected into the ceramic tube of the fuse. Not affected by location.
이외에도 추가적인 구성이 본 발명의 일 실시예에 따른 퓨즈 일체형 저항기에 더 포함될 수 있다.In addition, an additional configuration may be further included in the fuse-integrated resistor according to an embodiment of the present invention.
본 발명에 따르면 상술한 종래기술의 퓨즈 배치의 비대칭성을 개선함으로써 설계 시 원하는 시점보다 빨리 또는 늦게 단선이 이루어지는 문제점을 해결할 수 있다.According to the present invention, it is possible to solve the problem that the disconnection occurs earlier or later than a desired time point during design by improving the asymmetry of the arrangement of the fuses of the prior art.
또한, 본 발명에 따르면 제2 리드 선(204)의 2차 만곡 공정을 제거하여 생산성을 향상시키고 제2 리드 선(204)의 제2 금속 단부 커버(50)로의 용접 방식을 개선할 수 있다.In addition, according to the present invention, it is possible to improve productivity by eliminating the secondary bending process of the second lead wire 204 and to improve the welding method of the second lead wire 204 to the second metal end cover 50 .
또한, 본 발명에 따르면, 세라믹 튜브의 소형화를 통해서 전체 부품, 즉 퓨즈 일체형 저항기 완제품 사이즈를 소형화 할 수 있다.In addition, according to the present invention, the size of the entire component, that is, the fuse-integrated resistor, can be miniaturized through miniaturization of the ceramic tube.
도 1은 종래기술의 퓨즈 일체형 저항기의 구조를 도시하는 도면이다.1 is a view showing the structure of a conventional fuse-integrated resistor.
도 2는 종래기술의 퓨즈 일체형 저항기가 PCB 상에 배치되는 모습을 도시하는 도면으로서, 퓨즈 배치의 비대칭성을 설명하는 도면이다.FIG. 2 is a view illustrating a state in which a conventional fuse-integrated resistor is disposed on a PCB, and is a view for explaining asymmetry of the fuse arrangement.
도 3은 종래기술의 일체형 저항기에서 세라믹 튜브 내부에 배치되는 퓨즈로부터 연장되는 제2 리드 선이 금속 단부 커버 상에 납땜 되는 모습을 촬영한 사진이다.3 is a photograph of a state in which a second lead wire extending from a fuse disposed inside a ceramic tube is soldered onto a metal end cover in a prior art integrated resistor.
도 4는 본 발명의 일 실시예에 따른 퓨즈 일체형 저항기의 구조적 특징부를 도시하는 도면이다.4 is a diagram illustrating structural features of a fuse-integrated resistor according to an embodiment of the present invention.
도 5는 본 발명의 일 실시예에 따른 퓨즈 일체형 저항기에서 제2 리드 선이 세라믹 튜브에 형성된 홈에 삽입되는 모습을 종래기술과 대비하여 도시한 도면이다.5 is a diagram illustrating a state in which a second lead wire is inserted into a groove formed in a ceramic tube in the fuse-integrated resistor according to an embodiment of the present invention in comparison with the prior art.
도 6은 본 발명의 일 실시예에 따른 퓨즈 일체형 저항기의 단면도로서, 도 1의 종래기술의 단면도와 대비되어 본 발명의 특징을 나타내는 도면이다.6 is a cross-sectional view of a fuse-integrated resistor according to an embodiment of the present invention, and is a view showing features of the present invention in contrast to the cross-sectional view of the prior art of FIG. 1 .
도 7은 본 발명의 일 실시예에 따른 퓨즈 일체형 저항기에서 제2 리드 선이 용접되는 부위를 표시한 도면이다.7 is a view showing a portion where a second lead wire is welded in the fuse-integrated resistor according to an embodiment of the present invention.
도 8은 본 발명의 일 실시예에 따른 시제 제품에서 제2 리드 선이 용접된 상태를 확인할 수 있는 사진이다.8 is a photograph showing a state in which a second lead wire is welded in a prototype product according to an embodiment of the present invention.
도 4는 본 발명의 일 실시예에 따른 퓨즈 일체형 저항기의 구조적 특징부를 도시하는 도면이다. 본 발명의 구조에 대하여 도면을 참조하여 설명함에 있어서, 종래기술과 동일한 구성요소에 대해서는 동일한 도면부호를 사용하기로 한다. 도 4에서도 도면부호 10, 40 및 50은 종래기술에 대하여 설명하는 도 1에서도 동일하게 사용되었다. 종래기술에 대한 설명에서와 동일하게, 도면부호 10은 세라믹 튜브를 지시하고, 40은 제1 금속 단부 커버, 50은 제2 금속 단부 커버를 지시한다.4 is a diagram illustrating structural features of a fuse-integrated resistor according to an embodiment of the present invention. In describing the structure of the present invention with reference to the drawings, the same reference numerals will be used for the same components as those of the prior art. In FIG. 4, reference numerals 10, 40, and 50 are also used in the same manner in FIG. 1 for describing the prior art. As in the description of the prior art, reference numeral 10 denotes a ceramic tube, 40 denotes a first metal end cover, and 50 denotes a second metal end cover.
도 4로부터 명확히 확인할 수 있는 종래기술 대비 본 발명의 특징은 세라믹 튜브(10)에 길이 방향으로 홈(11)이 형성된다는 점이다. 이러한 홈(11)에는 제2 리드 선(204)이 삽입된다. 도 4에는 세라믹 튜브(10) 내부에 퓨즈(20)가 삽입된 상태가 도시되지 아니하나, 당업계의 통상적인 수준의 전문가라면 누구나 제2 리드 선(204)이 세라믹 튜브(10)의 홈(11)에 삽입된 상태에서 세라믹 튜브(10), 퓨즈(20) 및 제2 리드 선(204)의 위치 관계를 이해할 수 있다.A characteristic of the present invention compared to the prior art that can be clearly seen from FIG. 4 is that the groove 11 is formed in the ceramic tube 10 in the longitudinal direction. The second lead wire 204 is inserted into the groove 11 . Although the state in which the fuse 20 is inserted into the ceramic tube 10 is not shown in FIG. 4 , anyone skilled in the art can insert the second lead wire 204 into the groove ( 11), the positional relationship between the ceramic tube 10 , the fuse 20 , and the second lead wire 204 can be understood.
도 5는 본 발명의 일 실시예에 따른 퓨즈 일체형 저항기에서 제2 리드 선이 세라믹 튜브에 형성된 홈에 삽입되는 모습을 종래기술과 대비하여 도시한 도면이며, 이를 통하여 상기 위치 관계의 이해가 더욱 명확해질 것이다.5 is a view illustrating a state in which a second lead wire is inserted into a groove formed in a ceramic tube in the fuse-integrated resistor according to an embodiment of the present invention in comparison with the prior art, through which the understanding of the positional relationship is more clear will be done
도 5는 세라믹 튜브(10)에 퓨즈(20)와 퓨즈(20)에 연결된 제2 리드 선(204)이 배치된 상태의 횡방향 단면도이다. 나머지 구성요소들의 도시는 생략되었다. 도 5를 참조하면, 퓨즈(20)로부터 연장되어 1차 만곡된 제2 리드 선(204)이 세라믹 튜브(10) 내부 공간을 차지하는 양상을 확인할 수 있다. 종래기술에서는 제2 리드 선(204)이 퓨즈(20)와 함께 공간을 차지하였다. 이로 인하여 세라믹 튜브(10)의 내부에는 퓨즈(20)나 제2 리드 선(204)에 의해 점유되지 않는 빈 공간이 상대적으로 크게 발생한다. 이에 반해, 본 발명에서는 제2 리드 선(204)이 도 4에 도시된 바와 같은 세라믹 튜브(10)의 홈(11)에 삽입된다. 이러한 삽입 상태에서, 제2 리드 선(204)은 세라믹 튜브(10)의 내부 공간을 차지하지 않거나 내부 공간의 차지 정도가 최소화될 수 있어서, 세라믹 튜브(10)의 내부 공간은 거의 대부분 퓨즈(20)에 의해 점유될 수 있다. 이와 같은 홈(11)의 존재에 힘입어 동일한 퓨즈(20)와 제2 리드 선(204)을 사용하더라도, 종래기술의 구조에 비하여 세라믹 튜브(10)의 크기를 감소시킬 수 있음은 명확하다.5 is a lateral cross-sectional view of the ceramic tube 10 in which the fuse 20 and the second lead wire 204 connected to the fuse 20 are disposed. Illustration of the remaining components has been omitted. Referring to FIG. 5 , it can be seen that the second lead wire 204 that extends from the fuse 20 and is primarily curved occupies the inner space of the ceramic tube 10 . In the prior art, the second lead wire 204 occupied a space together with the fuse 20 . Due to this, an empty space not occupied by the fuse 20 or the second lead wire 204 is relatively large inside the ceramic tube 10 . In contrast, in the present invention, the second lead wire 204 is inserted into the groove 11 of the ceramic tube 10 as shown in FIG. In this inserted state, the second lead wire 204 does not occupy the inner space of the ceramic tube 10 or the degree of occupying the inner space of the ceramic tube 10 can be minimized, so that the inner space of the ceramic tube 10 is almost mostly used for the fuse 20 . ) can be occupied by It is clear that the size of the ceramic tube 10 can be reduced compared to the structure of the prior art even when the same fuse 20 and the second lead wire 204 are used thanks to the presence of the groove 11 .
본 발명의 일 실시예에 따른 퓨즈 일체형 저항기에서도 세라믹 튜브(10) 상에 저항선(30)이 권선된 후에 그 외부가 패키지 커버에 의해 감싸진다. 이러한 패키지 커버는 에폭시 수지와 실리콘 폴리머의 혼합물 등으로 제조될 수 있다. 이러한 커버는 열을 가하는 것에 의하여 변형되면서 저항선(30)이 권선된 세라믹 튜브(10) 및 금속 단부 커버(40, 50)를 빈틈없이 감쌀 수 있다. 세라믹 튜브(10)의 크기를 감소시킴과 동시에 종래와 동일한 두께의 외부 패키지 커버를 사용할 경우 완성품인 퓨즈 일체형 저항기의 소형화가 가능하다. 또한, 소형화 된 세라믹 튜브(10) 위에 증가된 두께의 외부 패키지 커버를 사용할 경우 동일한 크기에 발열 성능이 개선된 퓨즈 일체형 저항기의 제공이 가능하다. 퓨즈 일체형 저항기는 PCB 상에 다른 부품들과 함께 장착된 상태에서 발열체로 작용하는데, 품질 테스트를 통과하기 위해서는 발열 수준을 억제하여야 한다. 감소된 크기의 세라믹 튜브(10)를 사용하면서 증가된 두께의 외부 패키지 커버를 적용하는 경우 저항체에서 발생하는 열의 단열 성능이 향상되므로 전체 부품의 크기를 동일하게 유지하면서도 보다 양호한 수준의 발열 억제가 가능해진다.Even in the fuse-integrated resistor according to the embodiment of the present invention, after the resistance wire 30 is wound on the ceramic tube 10 , the outside thereof is covered by the package cover. Such a package cover may be made of, for example, a mixture of an epoxy resin and a silicone polymer. The cover can tightly wrap the ceramic tube 10 and the metal end covers 40 and 50 on which the resistance wire 30 is wound while being deformed by applying heat. When the size of the ceramic tube 10 is reduced and an external package cover having the same thickness as in the prior art is used, it is possible to reduce the size of the fuse-integrated resistor, which is a finished product. In addition, when an external package cover having an increased thickness is used on the miniaturized ceramic tube 10 , it is possible to provide a fuse-integrated resistor having the same size and improved heating performance. The fuse-integrated resistor acts as a heating element when mounted together with other components on the PCB. In order to pass the quality test, the level of heat generation must be suppressed. When the reduced-size ceramic tube 10 is used and the outer package cover of increased thickness is applied, the thermal insulation performance of the resistor is improved, so that a better level of heat suppression is possible while maintaining the same size of the entire component. becomes
나아가, 이와 같이 감소된 크기의 세라믹 튜브(10)의 중앙에 퓨즈(20)를 위치시킬 수 있다는 점이이해 되어야 한다. 이와 같은 퓨즈(20)의 중앙 위치 설정은 도 2와 관련하여 설명한 종래기술의 퓨즈 배치의 비대칭성으로 인한 문제를 해소할 수 있게 해준다. Furthermore, it should be understood that the fuse 20 can be positioned at the center of the ceramic tube 10 having a reduced size. This central positioning of the fuse 20 makes it possible to solve the problem caused by the asymmetry of the arrangement of the fuses of the prior art described with reference to FIG. 2 .
이제, 도 6을 참조하여, 본 발명의 일 실시예에 따른 퓨즈 일체형 저항기의 전체 구조를 설명하도록 한다. 도 6에 도시된 본 발명의 일 실시예에 따른 퓨즈 일체형 저항기의 구조는 도 1에 도시된 종래기술의 구조와 대비됨으로써 본 발명의 특징을 명확히 드러낼 것이다.Now, the overall structure of the integrated fuse resistor according to an embodiment of the present invention will be described with reference to FIG. 6 . The structure of the fuse-integrated resistor according to the embodiment of the present invention shown in FIG. 6 is compared with the structure of the prior art shown in FIG. 1 , thereby clearly revealing the characteristics of the present invention.
한쪽은 폐쇄되고 다른 쪽은 개방된 형태의 세라믹 튜브(10)의 단부에 각각 제1 금속 단부 커버(40)와 제2 금속 단부 커버(50)가 장착되는데, 제1 금속 단부 커버(40)는 폐쇄형 커버이고, 제2 금속 단부 커버(50)는 개방형 커버이다. 세라믹 튜브(10) 내부에 퓨즈(20)가 삽입되는데, 퓨즈(20)로는 제1 리드 선이 연결되고, 이 제1 리드 선은 개방된 제2 금속 단부 커버(50)를 통하여 외부로 연장된다. 퓨즈(20)의 다른 쪽에는 제2 리드 선(204)이 연결되고, 이 제2 리드 선(204)은 세라믹 튜브(10) 내부에서 1회 만곡 된다. 1회 만곡이 이루어진 제2 리드 선(204)은 세라믹 튜브(10)에 길이 방향으로 형성된 홈(11)에 삽입되고, 이러한 삽입 상태에서 제2 금속 단부 커버(50)까지 연장된다. 제2 리드 선(204)은 도 1의 종래기술에서와 같이 2차 만곡됨이 없이 제2 금속 단부 커버(50)에 전기 용접됨으로써 제2 금속 단부 커버(50)에 전기적으로 연결된다. 제2 금속 단부 커버(50)에는 저항선이 연결되고, 이 저항선은 세라믹 튜브(10)의 외부에 권선되고 제1 금속 단부 커버(40)에 전기적으로 연결된다. 제1 금속 단부 커버(40)에는 외부 리드 선이 연결된다. 이러한 상태에서 패키지 커버(60)를 씌우고 외부 리드 선(402) 및 제1 리드 선(202)을 각각 패키지 커버(60) 외부로 연장시킨다. 패키지 커버(60)는 다양한 합성 수지 재료로 형성 가능하며, 예컨대 에폭시 수지와 실리콘 폴리머의 혼합물로 제조될 수 있다. 패키지 커버(60)로 씌워지기 전에 세라믹 튜브(10) 내부는 충진재로 충진될 수 있다. 충진재로는 실리콘이 사용되는 것이 바람직하다.A first metal end cover 40 and a second metal end cover 50 are respectively mounted at the ends of the ceramic tube 10 in the form of one closed and the other open, the first metal end cover 40 is a closed cover, and the second metal end cover 50 is an open cover. A fuse 20 is inserted into the ceramic tube 10 . A first lead wire is connected to the fuse 20 , and the first lead wire extends to the outside through the open second metal end cover 50 . . A second lead wire 204 is connected to the other side of the fuse 20 , and the second lead wire 204 is bent once inside the ceramic tube 10 . The second lead wire 204 bent once is inserted into the groove 11 formed in the longitudinal direction of the ceramic tube 10 , and extends to the second metal end cover 50 in this inserted state. The second lead wire 204 is electrically connected to the second metal end cover 50 by being electrically welded to the second metal end cover 50 without secondary bending as in the prior art of FIG. 1 . A resistance wire is connected to the second metal end cover 50 , and the resistance wire is wound on the outside of the ceramic tube 10 and electrically connected to the first metal end cover 40 . An external lead wire is connected to the first metal end cover 40 . In this state, the package cover 60 is covered and the external lead wire 402 and the first lead wire 202 are extended to the outside of the package cover 60 , respectively. The package cover 60 may be formed of various synthetic resin materials, for example, may be made of a mixture of an epoxy resin and a silicone polymer. Before being covered with the package cover 60 , the inside of the ceramic tube 10 may be filled with a filler. As the filler, silicone is preferably used.
이와 같은 본 발명의 일 실시예에 따른 퓨즈 일체형 저항기의 구조는 도 1에 도시된 종래기술과 대비하여 다음의 점에서 다르다는 점을 알 수 있다.It can be seen that the structure of the fuse-integrated resistor according to the embodiment of the present invention is different from that of the prior art illustrated in FIG. 1 in the following respects.
먼저, 세라믹 튜브(10)의 홈(11) 형성 여부에서 차이가 있다. 본 발명에서는 홈(11)이 형성되나, 종래기술에서는 홈이 형성되지 않는다.First, there is a difference in whether the groove 11 of the ceramic tube 10 is formed. In the present invention, the groove 11 is formed, but in the prior art, the groove is not formed.
다음으로, 세라믹 튜브(10)의 홈(11)으로의 제2 리드 선(204)의 삽입 여부에서 차이가 있다. 본 발명에서는 세라믹 튜브(10)에 형성된 홈(11)에 제2 리드 선(204)이 삽입되나, 종래기술에서는 세라믹 튜브(10)에 홈이 없으므로, 제2 리드 선(204)은 이러한 홈에 삽입되는 구조가 아니다.Next, there is a difference in whether the second lead wire 204 is inserted into the groove 11 of the ceramic tube 10 . In the present invention, the second lead wire 204 is inserted into the groove 11 formed in the ceramic tube 10, but in the prior art, since there is no groove in the ceramic tube 10, the second lead wire 204 is inserted into this groove. It is not an embedded structure.
또한, 제2 리드 선(204)의 2회차 만곡의 실시 여부에 차이가 있다. 종래기술에서는 2회차 만곡되나, 본 발명에서는 1회차 만곡의 실시 형태까지는 동일하지만, 1회차 만곡 이후 제2 리드 선(204)은 제2 금속 단부 커버(50)의 외부 표면에 접촉하도록 재차 만곡되지 않고, 제2 금속 단부 커버(50)의 내부 표면과의 접촉 지점에서 용접된다. 이러한 용접 구조를 도 7과 도 8을 참조하여 보다 구체적으로 설명하기로 한다.Also, there is a difference in whether the second lead wire 204 is bent twice. In the prior art, it is bent twice, but in the present invention, it is the same up to the embodiment of the first bend, but after the first bend, the second lead wire 204 is bent again to contact the outer surface of the second metal end cover 50. and is welded at the point of contact with the inner surface of the second metal end cover 50 . Such a welding structure will be described in more detail with reference to FIGS. 7 and 8 .
도 7은 본 발명의 일 실시예에 따른 퓨즈 일체형 저항기에서 제2 리드 선이 용접되는 부위를 표시한 도면이다. 여기서 도시 생략된 제2 리드 선(204)은 퓨즈(20)로부터 연장되어 제1 금속 단부 커버(40)를 향하는 쪽에서 제1 리드 선(202)의 방향으로 1차 만곡되어 세라믹 튜브(10)의 홈(11)에 삽입된 상태에서 제2 금속 단부 커버(50)를 향해 연장된다. 도 7에 도시된 실시예는 도 6에 도시된 실시예와 달리 제2 금속 단부 커버(50)가 세라믹 튜브(10)보다 약간 앞으로 돌출 형성되어 있다. 이로 인하여, 제2 금속 단부 커버(50)까지 연장되는 제2 리드 선(204)은 제2 금속 단부 커버(50)의 내측면에 접하게 되는데, 이러한 접촉점에서 종래기술에서와 같은 2차 만곡 없이 용접이 이루어질 수 있다. 이러한 접촉점은 세라믹 튜브(10)의 단부와 제2 금속 단부 커버(50)의 단부 사이에 형성되므로 용접점이 외부로 돌출 형성되지 않는다. 이 점은 도 7을 통해 확인 가능하다.7 is a view showing a portion where a second lead wire is welded in the fuse-integrated resistor according to an embodiment of the present invention. The second lead wire 204 (not shown) extends from the fuse 20 and is first curved in the direction of the first lead wire 202 from the side facing the first metal end cover 40 to form the ceramic tube 10 . It extends toward the second metal end cover 50 in a state inserted into the groove 11 . In the embodiment shown in FIG. 7 , the second metal end cover 50 is formed to protrude slightly forward than the ceramic tube 10 , unlike the embodiment shown in FIG. 6 . Due to this, the second lead wire 204 extending to the second metal end cover 50 comes into contact with the inner surface of the second metal end cover 50, and at this contact point, there is no secondary bending as in the prior art. This can be done. Since the contact point is formed between the end of the ceramic tube 10 and the end of the second metal end cover 50 , the welding point does not protrude outward. This point can be confirmed through FIG. 7 .
도 8은 본 발명의 일 실시예에 따른 시제 제품에서 제2 리드 선(204)이 용접된 상태를 확인할 수 있는 사진이다.8 is a photograph confirming a state in which the second lead wire 204 is welded in a prototype product according to an embodiment of the present invention.
도 8의 사진에서 원형으로 표시된 부위가 용접 부위이다. 이러한 용접은 제2 리드 선(204)의 2차 만곡 없이 제2 금속 단부 커버(50)와의 내측 접촉 부위에서 이루어지므로, 용접을 실시하기 위하여 2차 만곡을 실시한 후 제2 금속 단부 커버(50)의 외부 표면 상의 용접 지점으로 자리를 잡는 번거로운 과정을 생략할 수 있다는 점에서 종래기술에 비하여 유리하다. 이러한 용접 과정에서 제2 리드 선(204)의 절단이 함께 이루어질 수 있고, 이는 리드 선 절단 공정을 제거할 수 있다는 추가적인 이점과 연결된다. 용접을 위한 2차 만곡 공정 및 리드 선 절단 공정이 제거될 수 있다는 점은 생산성 향상으로 이어질 수 있다. 또한, 용접 지점이 명확히 특정되므로, 종래기술에 비하여 용접 지점의 편차 발생 가능성이 대폭 줄어든다. A portion marked with a circle in the photo of FIG. 8 is a welding portion. Since this welding is made at the inner contact portion with the second metal end cover 50 without the secondary bending of the second lead wire 204, the second metal end cover 50 after performing the secondary bending in order to perform welding. It is advantageous compared to the prior art in that it can omit the cumbersome process of positioning the welding point on the outer surface of the . In this welding process, the second lead wire 204 can be cut together, which is connected with an additional advantage of eliminating the lead wire cutting process. The fact that the secondary bending process for welding and the lead wire cutting process can be eliminated can lead to improved productivity. In addition, since the welding point is clearly specified, the possibility of occurrence of deviation of the welding point is greatly reduced compared to the prior art.

Claims (3)

  1. 퓨즈 일체형 저항기로서,A fuse-integrated resistor comprising:
    중공 형상의 세라믹 튜브와,A hollow ceramic tube,
    상기 세라믹 튜브 상에 권선되는 저항선과,a resistance wire wound on the ceramic tube;
    상기 세라믹 튜브의 양 단부에 각각 설치되고, 상기 저항선에 의해 상호 연결되는 폐쇄형 제1 금속 단부 커버 및 개방형 제2 금속 단부 커버와,a closed first metal end cover and an open second metal end cover respectively installed at both ends of the ceramic tube and interconnected by the resistance wire;
    상기 제1 금속 단부 커버에 연결되는 외부 리드 선과,an external lead wire connected to the first metal end cover;
    상기 세라믹 튜브의 내부에 설치되고, 제1 리드 선과 제2 리드 선을 포함하는 퓨즈를 포함하고,and a fuse installed inside the ceramic tube and including a first lead wire and a second lead wire,
    상기 제1 리드 선은 상기 제2 금속 단부 커버를 통하여 외부로 연장되고,The first lead wire extends outwardly through the second metal end cover,
    상기 제2 리드 선은 상기 세라믹 튜브 내부에서 상기 제1 리드 선의 연장 방향으로 만곡되어 상기 제2 금속 단부 커버까지 연장하고 2차 만곡 없이 상기 제2 금속 단부 커버와 전기적으로 연결되고,The second lead wire is curved in the extension direction of the first lead wire inside the ceramic tube to extend to the second metal end cover and is electrically connected to the second metal end cover without a secondary curve,
    상기 세라믹 튜브의 내면에는 길이 방향으로 홈이 형성되고, 상기 제2 리드 선은 상기 홈에 삽입되고,A groove is formed in the inner surface of the ceramic tube in a longitudinal direction, and the second lead wire is inserted into the groove,
    상기 퓨즈는 온도 퓨즈이고, 상기 세라믹 튜브 내부로의 삽입 상태에서 상기 세라믹 튜브의 내부 공간의 실질적으로 중앙에 위치하고, 이로써 상기 세라믹 튜브를 통해 상기 퓨즈에 전달되는 열이 상기 퓨즈의 상기 세라믹 튜브 내 편향된 위치에 따른 영향을 받지 않는,The fuse is a thermal fuse, and is located substantially at the center of the inner space of the ceramic tube in the state of being inserted into the ceramic tube, whereby heat transferred to the fuse through the ceramic tube is deflected into the ceramic tube of the fuse. not affected by location,
    퓨즈 일체형 저항기.Fuse-integrated resistor.
  2. 제1항에 있어서, 상기 제2 금속 단부 커버는 상기 세라믹 튜브로부터 돌출 형성되고, 상기 제2 리드 선은 상기 세라믹 튜브로부터 빠져나와 상기 돌출된 제2 금속 단부 커버의 내측면에 전기적으로 접촉한 상태로 용접되는,The state of claim 1 , wherein the second metal end cover protrudes from the ceramic tube, and the second lead wire comes out of the ceramic tube and electrically contacts the inner surface of the protruding second metal end cover. welded with
    퓨즈 일체형 저항기.Fuse-integrated resistor.
  3. 제2항에 있어서,3. The method of claim 2,
    상기 퓨즈가 내부에 장착된 상태로 상기 세라믹 튜브의 내부 공간이 실리콘으로 충진되며,With the fuse mounted therein, the inner space of the ceramic tube is filled with silicon,
    이와 같은 충진이 완료된 상기 세라믹 튜브, 상기 저항선 및 상기 제1 및 제2 금속 단부 커버는 패키지 커버에 의해 감싸지는,The ceramic tube, the resistance wire, and the first and second metal end covers that are filled in this way are wrapped by a package cover,
    퓨즈 일체형 저항기.Fuse-integrated resistor.
PCT/KR2021/002082 2020-02-21 2021-02-18 Resistor with integrated fuse WO2021167379A1 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0834077B2 (en) * 1990-02-01 1996-03-29 内橋エステック株式会社 Alloy type thermal fuse
KR20140082061A (en) * 2012-12-21 2014-07-02 스마트전자 주식회사 Fuse resistor and manufacturing method thereof
US20160086757A1 (en) * 2013-06-28 2016-03-24 Zhonghou Xu Device Comprising a Thermal Fuse and a Resistor
KR20170000981U (en) * 2015-09-06 2017-03-15 동구안 베터 일렉트로닉스 테크놀로지 씨오., 엘티디. Combined type resistor
KR20180101108A (en) * 2017-03-03 2018-09-12 아벨정밀(주) Power type thermal fuse resistor and method of manufacturing same
KR102139261B1 (en) * 2020-06-03 2020-07-29 주식회사 케이포스 fuse combined resistor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0834077B2 (en) * 1990-02-01 1996-03-29 内橋エステック株式会社 Alloy type thermal fuse
KR20140082061A (en) * 2012-12-21 2014-07-02 스마트전자 주식회사 Fuse resistor and manufacturing method thereof
US20160086757A1 (en) * 2013-06-28 2016-03-24 Zhonghou Xu Device Comprising a Thermal Fuse and a Resistor
KR20170000981U (en) * 2015-09-06 2017-03-15 동구안 베터 일렉트로닉스 테크놀로지 씨오., 엘티디. Combined type resistor
KR20180101108A (en) * 2017-03-03 2018-09-12 아벨정밀(주) Power type thermal fuse resistor and method of manufacturing same
KR102139261B1 (en) * 2020-06-03 2020-07-29 주식회사 케이포스 fuse combined resistor

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