JP4887748B2 - Resistor - Google Patents

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JP4887748B2
JP4887748B2 JP2005329654A JP2005329654A JP4887748B2 JP 4887748 B2 JP4887748 B2 JP 4887748B2 JP 2005329654 A JP2005329654 A JP 2005329654A JP 2005329654 A JP2005329654 A JP 2005329654A JP 4887748 B2 JP4887748 B2 JP 4887748B2
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resistor
surface portion
pair
electrodes
bent
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JP2007141906A (en
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浩樹 小中
岳 渡辺
清二 津田
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Description

本発明は、各種電子機器の電流値検出等に使用される抵抗器に関するものである。   The present invention relates to a resistor used for detecting a current value of various electronic devices.

従来のこの種の抵抗器は、図４に示すように、板状の金属で構成された抵抗体１と、この抵抗体１の両端部の下面に形成された金属からなる一対の電極２とを備えた構成としていた。   As shown in FIG. 4, this type of conventional resistor includes a resistor 1 made of a plate-like metal, and a pair of electrodes 2 made of metal formed on the lower surfaces of both ends of the resistor 1. It was set as the structure provided with.

なお、この出願の発明に関する先行技術文献情報としては、例えば、特許文献１が知られている。
特開２００２−１８４６０１号公報 As prior art document information relating to the invention of this application, for example, Patent Document 1 is known.
JP 2002-184601 A

上記した従来の抵抗器においては、電極２が金属で形成されているため、電流印加時に抵抗体１で発生した熱によって電極２が高温となり、これにより、電極２から伝導する熱によって抵抗体１も高温になるため、抵抗体１の抵抗値が変動してしまい、その結果、高電力印加時においては使用できないという課題を有していた。   In the above-described conventional resistor, since the electrode 2 is made of metal, the electrode 2 becomes high temperature due to the heat generated in the resistor 1 when a current is applied. However, the resistance value of the resistor 1 fluctuates, and as a result, there is a problem that it cannot be used when high power is applied.

本発明は上記従来の課題を解決するもので、高電力印加時においても使用可能な抵抗器を提供することを目的とするものである。   The present invention solves the above-described conventional problems, and an object thereof is to provide a resistor that can be used even when high power is applied.

上記目的を達成するために本発明は、以下の構成を有するものである。   In order to achieve the above object, the present invention has the following configuration.

本発明の請求項１に記載の発明は、金属板で構成した抵抗体と、この抵抗体の両端部において前記抵抗体と一体的に設けられた一対の電極と、前記抵抗体の少なくとも一部を覆うように設けられた保護膜とを備え、前記一対の電極を、下方に折り曲げられた第１側面部と、さらにその折り曲げられた部分の途中で前記抵抗体の中央部に向かって折り曲げられた底面部と、さらにその途中で上方に折り曲げられた第２側面部とにより構成するとともに、前記第２側面部の先端部を前記抵抗体の下面に接続して前記一対の電極に空隙部を形成したもので、この構成によれば、抵抗体で発生した熱を空隙部によって放熱させることができるため、抵抗体が高温になるのを防止でき、これにより、高電力印加時においても使用可能になるという作用効果が得られるものである。 According to a first aspect of the present invention comprises a resistor and a metal plate, a pair of electrodes disposed Oite to the resistor integrally at both ends of the resistor, at least of the resistor A protective film provided so as to cover a part of the pair of electrodes, a first side surface portion bent downward, and further toward the center of the resistor in the middle of the bent portion It is constituted by a bent bottom surface part and a second side surface part bent upward in the middle, and a tip part of the second side surface part is connected to the lower surface of the resistor so that a gap is formed between the pair of electrodes. According to this configuration, since the heat generated in the resistor can be dissipated by the gap, it is possible to prevent the resistor from becoming high temperature, and even when high power is applied. The effect of becoming usable It is those that can be obtained.

本発明の請求項２に記載の発明は、特に、空隙部に金属体を形成したもので、この構成によれば、抵抗体で発生した熱を金属体に蓄熱させることができるため、抵抗体の温度をより低下させることができ、これにより、さらなる高電力印加時においても使用可能になるという作用効果が得られるものである。   The invention according to claim 2 of the present invention is particularly a metal body formed in the gap, and according to this configuration, the heat generated in the resistor can be stored in the metal body. Thus, the effect of being able to be used even when a higher electric power is applied can be obtained.

以上のように本発明の抵抗器は、金属板で構成した抵抗体と、この抵抗体の両端部において前記抵抗体と一体的に設けられた一対の電極と、前記抵抗体の少なくとも一部を覆うように設けられた保護膜とを備え、前記一対の電極を、下方に折り曲げられた第１側面部と、さらにその折り曲げられた部分の途中で前記抵抗体の中央部に向かって折り曲げられた底面部と、さらにその途中で上方に折り曲げられた第２側面部とにより構成するとともに、前記第２側面部の先端部を前記抵抗体の下面に接続して前記一対の電極に空隙部を形成しているため、抵抗体で発生した熱を空隙部によって放熱させることができ、これにより、抵抗体が高温になるのを防止できるため、高電力印加時においても使用可能になるという優れた効果を奏するものである。 Resistor of the present invention as described above, a resistor which is made of a metal plate, a pair of electrodes provided integrally with Oite the resistor at both ends of the resistor, at least one of the resistor A protective film provided to cover the portion, and the pair of electrodes is bent toward the central portion of the resistor in the middle of the first side portion bent downward and the bent portion. And a gap between the pair of electrodes by connecting a tip of the second side surface portion to the lower surface of the resistor. Since the heat generated in the resistor can be dissipated by the gap, and thus the resistor can be prevented from becoming high temperature, it can be used even when high power is applied. With the effect That.

図１は本発明の一実施の形態における抵抗器の斜視図、図２は同抵抗器の正面図である。   FIG. 1 is a perspective view of a resistor according to an embodiment of the present invention, and FIG. 2 is a front view of the resistor.

本発明の一実施の形態における抵抗器は、図１、図２に示すように、金属板で構成した抵抗体１１と、この抵抗体１１の両端部において折り曲げられて抵抗体１１と一体的に設けられた一対の電極１２と、前記抵抗体１１の少なくとも一部を覆うように設けられた保護膜１３とを備え、そして前記一対の電極１２の先端部１２ａを抵抗体１１の下面に接続するとともに前記電極１２に空隙部１４を形成しているものである。 As shown in FIGS. 1 and 2, a resistor according to an embodiment of the present invention is integrally formed with a resistor 11 formed of a metal plate and bent at both ends of the resistor 11. A pair of electrodes 12 provided and a protective film 13 provided so as to cover at least a part of the resistor 11 are provided, and tip portions 12 a of the pair of electrodes 12 are connected to the lower surface of the resistor 11. A gap 14 is formed in the electrode 12.

上記構成において、前記抵抗体１１は、ニクロム、銅ニッケル、マンガニン等の導電性の良好な板状の金属からなる金属板で構成され、その長さは１．０〜１５ｍｍ、幅は０．５〜１０ｍｍ、厚みは１００〜１０００μｍとなっている。さらに、この抵抗体１１の上面にはエポキシ樹脂、ポリイミド樹脂等の絶縁材からなる保護膜１３が形成されている。なお、前記抵抗体１１は一部に抵抗値調整用の切欠きを形成してもよいものである。   In the above configuration, the resistor 11 is made of a metal plate made of a plate-like metal having good conductivity such as nichrome, copper nickel, manganin, etc., and has a length of 1.0 to 15 mm and a width of 0.5. 10 mm and the thickness is 100 to 1000 μm. Further, a protective film 13 made of an insulating material such as epoxy resin or polyimide resin is formed on the upper surface of the resistor 11. The resistor 11 may be partially formed with a notch for adjusting the resistance value.

また前記一対の電極１２は、抵抗体１１の両端部において抵抗体１１と一体的に設けられ、かつ一部が下方に折り曲げられているもので、すなわち、この一対の電極１２は、抵抗体１１の両端部が下方に折り曲げられた第１側面部１２ｂと、さらにその折り曲げられた部分の途中で抵抗体１１の中央部に向かって折り曲げられた底面部１２ｃと、さらにその途中で上方に折り曲げられた第２側面部１２ｄとにより構成されている。また、前記第１側面部１２ｂ、底面部１２ｃ、第２側面部１２ｄの長さは、抵抗体１１の長さの１／１０〜１／３となっている。 Further, the pair of electrodes 12 are integrally provided with the resistor 11 at both ends of the resistor 11, and a part thereof is bent downward. A first side surface portion 12b whose both end portions are bent downward, a bottom surface portion 12c which is bent toward the central portion of the resistor 11 in the middle of the bent portion, and further bent upward in the middle thereof. And the second side surface portion 12d. The lengths of the first side surface portion 12b, the bottom surface portion 12c, and the second side surface portion 12d are 1/10 to 1/3 of the length of the resistor 11.

そして、前記第２側面部１２ｄの先端部（電極１２の先端部１２ａ）は抵抗体１１の下面と当接しているもので、この当接した部分において第２側面部１２ｄと抵抗体１１とが溶接等により接続されることにより、電極１２にロ字状の空隙部１４が形成される。 The distal end portion of the second side surface portion 12d (the distal end portion 12a of the electrode 12) is in contact with the lower surface of the resistor 11, and the second side surface portion 12d and the resistor 11 are in contact with each other. By connecting by welding or the like, a square -shaped void portion 14 is formed in the electrode 12 .

さらに、前記電極１２の底面部１２ｃの下面にはすずめっきが施されるもので、これにより抵抗器は実装基板に実装される。なお、このすずめっきと電極１２の底面部１２ｃの下面との間には必要に応じてニッケルめっき、銅めっき、金めっきを形成してもよいものである。   Further, the lower surface of the bottom surface portion 12c of the electrode 12 is subjected to tin plating, whereby the resistor is mounted on the mounting substrate. Note that nickel plating, copper plating, or gold plating may be formed between the tin plating and the lower surface of the bottom surface portion 12c of the electrode 12 as necessary.

次に、本発明の一実施の形態における抵抗器の製造方法について説明する。   Next, a method for manufacturing a resistor according to an embodiment of the present invention will be described.

図１、図２において、まず、板状の金属に、切断加工、打ち抜き加工、プレス加工等を施すことにより、所定形状の金属板を形成する。   1 and 2, first, a metal plate having a predetermined shape is formed by subjecting a plate-like metal to cutting, punching, pressing and the like.

次に、この金属板の両端部を下方に折り曲げて第１側面部１２ｂを形成する。 Next, both end portions of the metal plate are bent downward to form the first side surface portion 12b .

次に、その折り曲げられた部分の途中で抵抗体１１の中央部に向かって折り曲げ、底面部１２ｃを形成する。   Next, the bottom portion 12c is formed by bending toward the center of the resistor 11 in the middle of the bent portion.

次に、その折り曲げられた部分の途中で上方に折り曲げて、第２側面部１２ｄを形成し、電極１２を設ける。このとき、第２側面部１２ｄの先端部（電極１２の先端部１２ａ）を抵抗体１１の下面と当接させる。 Next, the second side surface portion 12d is formed by bending upward in the middle of the bent portion, and the electrode 12 is provided. At this time, the distal end portion of the second side surface portion 12 d (the distal end portion 12 a of the electrode 12) is brought into contact with the lower surface of the resistor 11.

次に、電極１２の先端部１２ａを抵抗体１１の下面に溶接により接続する。   Next, the tip 12a of the electrode 12 is connected to the lower surface of the resistor 11 by welding.

次に、抵抗体１１の上面に、保護膜１３を熱圧着、超音波溶着等により形成する。このとき、抵抗体１１の下面に位置する電極１２の先端部１２ａ間に保護膜１３を形成してもよい。   Next, the protective film 13 is formed on the upper surface of the resistor 11 by thermocompression bonding, ultrasonic welding, or the like. At this time, the protective film 13 may be formed between the tip portions 12 a of the electrodes 12 positioned on the lower surface of the resistor 11.

最後に、電極１２の底面部１２ｃの下面にすずめっきを形成する。   Finally, tin plating is formed on the lower surface of the bottom surface portion 12 c of the electrode 12.

上記した本発明の一実施の形態においては、抵抗体１１の両端部において前記抵抗体１１と一体的に設けられた一対の電極１２を、下方に折り曲げられた第１側面部１２ｂと、さらにその折り曲げられた部分の途中で前記抵抗体１１の中央部に向かって折り曲げられた底面部１２ｃと、さらにその途中で上方に折り曲げられた第２側面部１２ｄとにより構成するとともに、前記第２側面部１２ｄの先端部１２ａを前記抵抗体１１の下面に接続して前記一対の電極１２に空隙部１４を形成しているため、この空隙部１４によって抵抗体１１で発生した熱を放熱させることができ、これにより、抵抗体１１が高温になるのを防止できるため、高電力印加時においても使用可能になるという効果が得られるものである。また、抵抗体１１は高温とならないため、小型化も可能となるものである。 In one embodiment of the present invention described above, a first side surface portion 12b of the pair of electrodes 12 provided above the resistor 11 and integrally Oite to both ends of the resistor 11, bent downward, Further, the second portion 12c is bent in the middle of the bent portion toward the central portion of the resistor 11 and the second side surface portion 12d is bent upward in the middle. Since the front end portion 12a of the side surface portion 12d is connected to the lower surface of the resistor 11, and the gap portion 14 is formed in the pair of electrodes 12, heat generated in the resistor 11 is radiated by the gap portion 14. As a result, it is possible to prevent the resistor 11 from becoming high temperature, so that the effect that the resistor 11 can be used even when high power is applied is obtained. Further, since the resistor 11 does not reach a high temperature, it can be downsized.

そしてまた、前記電極１２においては、金属板が空隙部１４を介して抵抗体１１と底面部１２ｃとの上下に存在しているため、この金属板に上下方向の弾性を持たせることができ、これにより、上下方向の応力を緩和できるため、はんだが受ける力を低減でき、その結果、はんだの長寿命化も可能になるという効果も期待できるものである。   In addition, in the electrode 12, since the metal plate exists above and below the resistor 11 and the bottom surface portion 12c through the gap portion 14, the metal plate can be given elasticity in the vertical direction, Thereby, since the stress in the vertical direction can be relieved, the force received by the solder can be reduced, and as a result, the effect that the life of the solder can be extended can also be expected.

さらに、電極１２の先端部１２ａ（第２側面部１２ｄの先端部）と抵抗体１１とを接続することにより、実装基板から流れる電流が、第１側面部１２ｂと第２側面部１２ｄの両方に並列で流れるため、抵抗値を下げることができる。   Further, by connecting the tip portion 12a of the electrode 12 (tip portion of the second side surface portion 12d) and the resistor 11, the current flowing from the mounting substrate is applied to both the first side surface portion 12b and the second side surface portion 12d. Since it flows in parallel, the resistance value can be lowered.

なお、図３に示すように、空隙部１４に金属体１５を形成すれば、抵抗体１１で発生した熱を金属体１５に蓄熱させることができるため、抵抗体１１の温度をより低下させることができ、これにより、さらなる高電力印加時においても使用可能となるものである。このとき、金属体１５は底面部１２ｃの上面に載置し、はんだ等で接続する。   As shown in FIG. 3, if the metal body 15 is formed in the gap portion 14, the heat generated in the resistor 11 can be stored in the metal body 15, so that the temperature of the resistor 11 is further reduced. Thus, it can be used even when higher power is applied. At this time, the metal body 15 is placed on the upper surface of the bottom surface portion 12c and connected with solder or the like.

本発明に係る抵抗器は、高電力印加時においても使用が可能となるものであり、各種電子機器の電流値検出等に使用される抵抗器において有用となるものである。   The resistor according to the present invention can be used even when high power is applied, and is useful in resistors used for detecting the current value of various electronic devices.

本発明の一実施の形態における抵抗器の斜視図The perspective view of the resistor in one embodiment of this invention 同抵抗器の正面図Front view of the resistor 同抵抗器の他の例を示す正面図Front view showing another example of the same resistor 従来の抵抗器の斜視図A perspective view of a conventional resistor

１１ 抵抗体
１２ 一対の電極
１２ａ 電極の先端部
１３ 保護膜
１４ 空隙部
１５ 金属体 DESCRIPTION OF SYMBOLS 11 Resistor 12 A pair of electrodes 12a The front-end | tip part of an electrode 13 Protective film 14 The space | gap part 15 Metal body

Claims (2)

金属板で構成した抵抗体と、この抵抗体の両端部において前記抵抗体と一体的に設けられた一対の電極と、前記抵抗体の少なくとも一部を覆うように設けられた保護膜とを備え、前記一対の電極を、下方に折り曲げられた第１側面部と、さらにその折り曲げられた部分の途中で前記抵抗体の中央部に向かって折り曲げられた底面部と、さらにその途中で上方に折り曲げられた第２側面部とにより構成するとともに、前記第２側面部の先端部を前記抵抗体の下面に接続して前記一対の電極に空隙部を形成した抵抗器。 A resistor which is made of a metal plate, a pair of electrodes provided integrally with Oite the resistor at both ends of the resistor, and a protective film provided so as to cover at least a portion of the resistor A pair of electrodes, a first side surface portion bent downward, a bottom portion bent toward the center of the resistor in the middle of the bent portion, and further upward in the middle And a second side surface portion bent into a pair, and a tip end portion of the second side surface portion is connected to a lower surface of the resistor to form a gap in the pair of electrodes. 空隙部に金属体を形成した請求項１記載の抵抗器。 The resistor according to claim 1, wherein a metal body is formed in the gap.
JP2005329654A 2005-11-15 2005-11-15 Resistor Expired - Fee Related JP4887748B2 (en)

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US8325007B2 (en) * 2009-12-28 2012-12-04 Vishay Dale Electronics, Inc. Surface mount resistor with terminals for high-power dissipation and method for making same
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