JP7470998B2 - Substrate surface mount fuse and method for manufacturing the same - Google Patents

Substrate surface mount fuse and method for manufacturing the same Download PDF

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JP7470998B2
JP7470998B2 JP2021210141A JP2021210141A JP7470998B2 JP 7470998 B2 JP7470998 B2 JP 7470998B2 JP 2021210141 A JP2021210141 A JP 2021210141A JP 2021210141 A JP2021210141 A JP 2021210141A JP 7470998 B2 JP7470998 B2 JP 7470998B2
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terminal
fuse
relay
substrate
surface mount
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JP2023094693A (en
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史幸 川瀬
和樹 森下
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Pacific Engineering Corp
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Pacific Engineering Corp
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Priority to PCT/JP2022/037040 priority patent/WO2023119787A1/en
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    • 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
    • H01H85/143—Electrical contacts; Fastening fusible members to such contacts
    • H01H85/147—Parallel-side contacts

Description

本願発明は、主に自動車用電気回路等に用いられるヒューズに関し、特に、基板表面に実装される基板表面実装ヒューズ、及び基板表面実装ヒューズの製造方法に関する。 This invention relates to fuses that are primarily used in automotive electrical circuits, and in particular to surface mount fuses that are mounted on the surface of a substrate, and a method for manufacturing surface mount fuses.

従来から、ヒューズは、自動車等に搭載されている電気回路や、電気回路に接続されている各種電装品を保護するために用いられてきた。詳しくは、電気回路中に意図しない過電流が流れた場合に、ヒューズに内蔵されたヒューズエレメントの溶断部が過電流による発熱により溶断して、各種電装品に過度な電流が流れないように保護している。 Fuses have traditionally been used to protect electrical circuits installed in automobiles and the like, as well as various electrical equipment connected to the electrical circuits. More specifically, when an unintended overcurrent flows through an electrical circuit, the melting part of the fuse element built into the fuse melts due to heat generated by the overcurrent, protecting the various electrical equipment from excessive current flowing through them.

そして、このヒューズは様々な種類があり、例えば、特許文献１に示すような、基板に取り付けられるヒューズが知られている。このヒューズは溶断部と端子部とを備えており、当該端子部を、基板に設けられた音叉端子に差し込むように取り付けている。ただ、ヒューズを基板に取り付けて両者を中継するために、音叉端子を利用しているため、その分、部品点数が増加し、重量の増加と全体の高さが高くなるという問題があった。 There are various kinds of fuses, and for example, a fuse that is attached to a board is known, as shown in Patent Document 1. This fuse has a fusing part and a terminal part, and the terminal part is attached by being inserted into a tuning fork terminal provided on the board. However, because the tuning fork terminal is used to attach the fuse to the board and relay the two, there are problems with the number of parts increasing, which increases the weight and the overall height.

特開２０１５－１８５２４３号JP 2015-185243 A

そこで、本願発明は、部品点数を削減し、構成全体の軽量化及び低背化が可能な基板表面実装ヒューズ、及び基板表面実装ヒューズの製造方法を提供する。 The present invention provides a surface mount fuse that reduces the number of components and makes the overall structure lighter and thinner, and a method for manufacturing the surface mount fuse.

本願発明の基板表面実装ヒューズは、ハウジングと、当該ハウジング内に配置される溶断部と、当該溶断部の両端に連結される端子部とを備えた、基板の表面に実装される基板表面実装ヒューズであって、前記基板に接続される中継端子を備え、前記中継端子は、前記端子部と接続される接続部を備え、前記接続部には、凹部が形成されており、前記凹部内に、前記端子部の一部が入り込んで接合していることを特徴とする。 The surface mount fuse of the present invention is a surface mount fuse mounted on the surface of a substrate, comprising a housing, a fusing portion disposed within the housing, and terminal portions connected to both ends of the fusing portion, and is characterized in that it comprises an intermediate terminal connected to the substrate, the intermediate terminal comprises a connecting portion connected to the terminal portion, a recess is formed in the connecting portion, and a portion of the terminal portion is inserted into the recess and joined.

上記特徴によれば、中継端子が基板表面実装ヒューズに一体に設けられているため、従来の音叉端子のような中継部材を別途、基板に設ける必要がなく、部品点数の削減に寄与し、基板表面実装ヒューズ及び基板を含めた構成全体（例えば、基板を備えるヒューズボックスなど）の軽量化及び低背化が可能となる。さらに、溶断部の端子部の一部を凹部に入り込ませるように接合しているため、両者の接続固定が確実に実現できるのである。 With the above features, the relay terminal is integrally provided with the surface-mounted fuse, eliminating the need to provide a separate relay member, such as a conventional tuning fork terminal, on the board, which contributes to a reduction in the number of parts and enables the weight and height of the entire configuration including the surface-mounted fuse and board (e.g., a fuse box with a board). Furthermore, because part of the terminal portion of the fusing portion is joined so as to fit into the recess, the connection and fixation of the two can be reliably achieved.

本願発明の基板表面実装ヒューズは、前記中継端子の接続部を構成する金属の融点が、前記端子部を構成する金属の融点よりも高いことを特徴とする。 The surface-mounted fuse of the present invention is characterized in that the melting point of the metal constituting the connection portion of the relay terminal is higher than the melting point of the metal constituting the terminal portion.

端子部を溶融させた際に、端子部の一部が凹部によく入り込んで接合し、両者の接続固定がより確実に実現できるのである。 When the terminal is melted, part of the terminal penetrates well into the recess and joins, ensuring a more secure connection between the two.

本願発明の基板表面実装ヒューズは、前記端子部を構成する金属は、亜鉛合金であり、前記中継端子の前記接続部を構成する金属は、銅合金であることを特徴とする。 The surface-mounted fuse of the present invention is characterized in that the metal constituting the terminal portion is a zinc alloy, and the metal constituting the connection portion of the relay terminal is a copper alloy.

上記特徴によれば、所望の溶断特性が発揮できると共に、基板や外部端子との電気的接続の信頼性を担保できる。 The above features allow the desired fusing characteristics to be achieved while ensuring the reliability of electrical connections with the substrate and external terminals.

本願発明の基板表面実装ヒューズの製造方法は、前記端子部の一部を加圧しながら加熱することで、前記凹部内に接合させることを特徴とする。 The method of manufacturing a surface-mounted fuse of the present invention is characterized in that a portion of the terminal is heated while being pressurized, thereby bonding it into the recess.

上記特徴によれば、端子部の一部を加圧しながら加熱することで、溶融した端子部の一部が、中継端子の凹部に確実に流れ込むので、より強固に接合ができるのである。 According to the above feature, by applying pressure to a portion of the terminal while heating it, a portion of the molten terminal reliably flows into the recess of the intermediate terminal, resulting in a stronger bond.

上記のように、本願発明の基板表面実装ヒューズ及び基板表面実装ヒューズの製造方法によれば、部品点数を削減し、軽量化及び低背化が可能である。
 As described above, the surface mount fuse and the method for manufacturing the surface mount fuse of the present invention make it possible to reduce the number of parts and achieve a lighter, thinner fuse.

本願発明の基板表面実装ヒューズを分解した全体斜視図である。1 is an exploded overall perspective view of a surface mount fuse according to the present invention; （ａ）は、本願発明の基板表面実装ヒューズの中継端子の平面図、（ｂ）は、中継端子の正面図である。1A is a plan view of a relay terminal of a substrate surface mount fuse according to the present invention, and FIG. 1B is a front view of the relay terminal. （ａ）は、基板表面実装ヒューズの端子部を中継端子に取り付けた状態の平面図、（ｂ）は、基板表面実装ヒューズの端子部を中継端子に取り付けた状態の正面図である。1A is a plan view showing a state in which a terminal portion of a surface-mounted fuse is attached to a relay terminal, and FIG. 1B is a front view showing a state in which a terminal portion of a surface-mounted fuse is attached to a relay terminal. 各部品を組付けた状態の基板表面実装ヒューズの全体斜視図である。FIG. 2 is an overall perspective view of a surface mount fuse with all components assembled; 基板表面実装ヒューズを基板に取り付ける前の状態の全体斜視図である。FIG. 2 is an overall perspective view of a surface mount fuse before it is attached to a substrate. 基板表面実装ヒューズを基板に取り付けた状態の全体斜視図である。FIG. 2 is an overall perspective view of a surface mount fuse attached to a substrate.

１００ 基板表面実装ヒューズ
１１０ ハウジング
１２０ 溶断部
１３０ 端子部
１４０ 中継端子
１４１ 接続部
１４６ 凹部
１５０ 中継端子
１５１ 接続部
１５６ 凹部
３００ 基板
 REFERENCE SIGNS LIST 100 Substrate surface-mounted fuse 110 Housing 120 Fusing portion 130 Terminal portion 140 Relay terminal 141 Connection portion 146 Recess 150 Relay terminal 151 Connection portion 156 Recess 300 Substrate

以下に、本願発明の実施形態について、図面を用いて説明する。なお、以下で説明する実施形態における基板表面実装ヒューズの各部材の形状や材質等は、一例を示すものであって、これらに限定されるものではない。なお、本願明細書において、「上方向」とは、図６に示すように、基板表面実装ヒューズを基板の水平方向に広がる表面に固定した状態で、水平方向に対して直角に交わる方向、すなわち鉛直方向に沿った上方向のことであり、「下方向」とは、当該鉛直方向に沿った下方向のことである。 The following describes an embodiment of the present invention with reference to the drawings. Note that the shapes and materials of the components of the surface-mounted fuse in the embodiments described below are merely examples and are not intended to be limiting. Note that in this specification, the "upward direction" refers to the direction perpendicular to the horizontal direction, i.e., the upward direction along the vertical direction, when the surface-mounted fuse is fixed to the horizontally extending surface of the board as shown in FIG. 6, and the "downward direction" refers to the downward direction along the vertical direction.

まず、本願発明に係る基板表面実装ヒューズ１００を図１から図４に示す。図１は、基板表面実装ヒューズ１００を分解した全体斜視図、図２（ａ）は基板表面実装ヒューズ１００の中継端子（１４０、１５０）の平面図、図２（ｂ）は、中継端子（１４０、１５０）の正面図、図３（ａ）は、基板表面実装ヒューズ１００の端子部１３０を中継端子（１４０、１５０）に取り付けた状態の平面図、図３（ｂ）は、基板表面実装ヒューズ１００の端子部１３０を中継端子（１４０、１５０）に取り付けた状態の正面図、図４は、各部品を組付けた状態の基板表面実装ヒューズ１００の全体斜視図である。 First, the substrate surface-mounted fuse 100 according to the present invention is shown in Figs. 1 to 4. Fig. 1 is an overall perspective view of the substrate surface-mounted fuse 100 disassembled, Fig. 2(a) is a plan view of the relay terminals (140, 150) of the substrate surface-mounted fuse 100, Fig. 2(b) is a front view of the relay terminals (140, 150), Fig. 3(a) is a plan view of the state in which the terminal portion 130 of the substrate surface-mounted fuse 100 is attached to the relay terminals (140, 150), Fig. 3(b) is a front view of the state in which the terminal portion 130 of the substrate surface-mounted fuse 100 is attached to the relay terminals (140, 150), and Fig. 4 is an overall perspective view of the substrate surface-mounted fuse 100 with each component attached.

図１に示すように、基板表面実装ヒューズ１００は、略直方体形状のハウジング１１０と、ハウジング１１０内に配置される溶断部１２０と、当該溶断部１２０の両側のそれぞれに連結固定されている端子部１３０と、当該端子部１３０と連結される中継端子（１４０、１５０）とを備える。ハウジング１１０は、絶縁性の合成樹脂によって略直方体形状に形成されており、内部は空洞となっている。そして、ハウジング１１０は、上面壁１１１と下面壁１１２とを備えており、溶断部１２０を上下から挟み込むように覆い、内部に溶断部１２０を収容できるようになっている。 As shown in FIG. 1, the substrate surface mount fuse 100 comprises a housing 110 having a generally rectangular parallelepiped shape, a fusing portion 120 disposed within the housing 110, terminal portions 130 connected and fixed to both sides of the fusing portion 120, and relay terminals (140, 150) connected to the terminal portion 130. The housing 110 is formed from an insulating synthetic resin into a generally rectangular parallelepiped shape, and is hollow inside. The housing 110 comprises an upper wall 111 and a lower wall 112, which sandwich and cover the fusing portion 120 from above and below, allowing the fusing portion 120 to be housed inside.

また、溶断部１２０は、亜鉛合金によって細く線状に形成されており、基板に接続された電気回路中に所定の過電流が流れた際に、溶断する特性を備える。さらに、溶断部１２０の両側のそれぞれに連結されている端子部１３０は、金属製の薄い板部材であって、溶断部１２０と電気的及び物理的に接続できるようになっている。図１に示す基板表面実装ヒューズ１００では、溶断部１２０と端子部１３０は一体形成されており、端子部１３０は、溶断部１２０と同様に、亜鉛合金によって形成されている。 Fusing portion 120 is made of a zinc alloy and is formed into a thin wire shape, and has the property of melting when a certain overcurrent flows in an electric circuit connected to the board. Furthermore, terminal portions 130 connected to both sides of fusing portion 120 are thin metal plate members that can be electrically and physically connected to fusing portion 120. In the board surface mount fuse 100 shown in FIG. 1, fusing portion 120 and terminal portion 130 are integrally formed, and terminal portion 130 is made of a zinc alloy, just like fusing portion 120.

なお、亜鉛合金は、合金を構成する構成元素のうち、最も多く含まれる構成元素が亜鉛（Ｚｎ）である合金のことである。また、溶断部１２０と端子部１３０は一体形成されているが、これに限定されず、溶断部１２０と端子部１３０を個別に製造しておき、両者を接合してもよい。さらに、溶断部１２０と端子部１３０は、異なる金属で構成されてもよい。 Note that a zinc alloy is an alloy in which the most abundant element among the constituent elements that make up the alloy is zinc (Zn). Furthermore, although the fusing portion 120 and the terminal portion 130 are integrally formed, this is not limited thereto, and the fusing portion 120 and the terminal portion 130 may be manufactured separately and then joined together. Furthermore, the fusing portion 120 and the terminal portion 130 may be made of different metals.

なお、溶断部１２０は、図１に示す形状及び構成に限定されず、所定の過電流が流れると溶断する特性を備えるものであれば、その他の形状及び構成であってもよい。また、端子部１３０は、溶断部１２０と電気的に接続可能で、後述するように中継端子と接合することができるのであれば、亜鉛合金以外の任意の金属によって形成してもよい。 The fusing portion 120 is not limited to the shape and configuration shown in FIG. 1, and may have other shapes and configurations as long as it has the property of fusing when a predetermined overcurrent flows. Furthermore, the terminal portion 130 may be formed of any metal other than a zinc alloy as long as it can be electrically connected to the fusing portion 120 and can be joined to a relay terminal as described below.

また、図１及び図２に示すように、中継端子１４０は、銅合金によって略コ字状に形成されており、端子部１３０及び基板３００に接続可能に構成されている。具体的には、中継端子１４０は、端子部１３０と重ねられて連結固定される平坦な接続部１４１と、接続部１４１から下方へ延出する脚部１４２と、基板上に接続される固定部１４３とを備える。固定部１４３は、後述する基板の表面に、ハンダ付け等によって固定される部分であり、当該固定部１４３は平坦面となっているので、基板の表面に密着し易くなっている。さらに、中継端子１４０の接続部１４１には、下方へ凹んだ凹部１４６が形成されている。この凹部１４６は、平坦な接続部１４１において、直線状に延出する溝の態様となっている。 1 and 2, the relay terminal 140 is made of a copper alloy and is formed in a generally U-shape, and is configured to be connectable to the terminal portion 130 and the substrate 300. Specifically, the relay terminal 140 includes a flat connection portion 141 that is overlapped with the terminal portion 130 and fixed, a leg portion 142 that extends downward from the connection portion 141, and a fixing portion 143 that is connected to the substrate. The fixing portion 143 is a portion that is fixed to the surface of the substrate, which will be described later, by soldering or the like, and the fixing portion 143 has a flat surface, so that it can be easily attached to the surface of the substrate. Furthermore, a recess 146 that is recessed downward is formed in the connection portion 141 of the relay terminal 140. This recess 146 is in the form of a groove that extends linearly in the flat connection portion 141.

なお、銅合金は、合金を構成する構成元素のうち、最も多く含まれる構成元素が銅（Ｃｕ）である合金のことである。また、中継端子１４０では、接続部１４１と脚部１４２は一体形成されているが、これに限定されず、接続部１４１と脚部１４２を個別に製造しておき、両者を接合してもよい。さらに、接続部１４１と脚部１４２は、異なる金属で構成されてもよい。 Note that a copper alloy is an alloy in which the most abundant element among the constituent elements that make up the alloy is copper (Cu). In addition, in relay terminal 140, connection portion 141 and leg portion 142 are integrally formed, but this is not limited thereto, and connection portion 141 and leg portion 142 may be manufactured separately and then joined together. Furthermore, connection portion 141 and leg portion 142 may be made of different metals.

また、図１及び図２に示すように、中継端子１５０は、銅合金によって略Ｌ字状に形成されており、端子部１３０及び基板３００に接続可能に構成されている。具体的には、中継端子１５０は、端子部１３０と重ねられて連結固定される平坦な接続部１５１と、接続部１５１から下方へ延出する脚部１５２とを備える。脚部１５２は、後述する基板の挿通孔に挿入されて固定され、外部端子に接続可能に構成されている。さらに、中継端子１５０の接続部１５１には、下方へ凹んだ凹部１５６が形成されている。この凹部１５６は、平坦な接続部１５１において、直線状に延出する溝の態様となっている。また、中継端子１５０では、接続部１５１と脚部１５２は一体形成されているが、これに限定されず、接続部１５１と脚部１５２は個別に製造しておき、両者を接合してもよい。さらに、接続部１５１と脚部１５２は、異なる金属で構成されてもよい。 1 and 2, the relay terminal 150 is formed in a substantially L-shape from a copper alloy and is configured to be connectable to the terminal portion 130 and the substrate 300. Specifically, the relay terminal 150 includes a flat connection portion 151 that is overlapped with the terminal portion 130 and connected and fixed thereto, and a leg portion 152 that extends downward from the connection portion 151. The leg portion 152 is inserted and fixed into an insertion hole in the substrate described later, and is configured to be connectable to an external terminal. Furthermore, a recess 156 that is recessed downward is formed in the connection portion 151 of the relay terminal 150. This recess 156 is in the form of a groove that extends linearly in the flat connection portion 151. Furthermore, in the relay terminal 150, the connection portion 151 and the leg portion 152 are integrally formed, but this is not limited thereto, and the connection portion 151 and the leg portion 152 may be manufactured separately and then joined together. Furthermore, the connection portion 151 and the leg portion 152 may be made of different metals.

なお、中継端子（１４０、１５０）は、基板や外部端子等との電気的な接続信頼性を担保するために、電気伝導性や耐食性が良好な銅合金から構成されているが、これに限定されず、電気的な接続信頼性を担保できるのであれば、その他の任意の金属から構成してもよい。また、正面視で、一方の中継端子１４０は略コ字形状、他方の中継端子１５０は略Ｌ字形状に形成されているが、これに限定されず、中継端子（１４０、１５０）は、基板や外部端子等と電気的に接続できるのであれば、任意の形状であってもよい。また、凹部（１４６、１５６）は、直線状に延出する溝の態様となっているが、これに限定されず、凹部（１４６、１５６）は、下方へ凹んでおり、後述するように溶融した端子部１３０の一部が内部に入り込んで接合できるのであれば、任意の形状であってもよい。 In addition, the relay terminals (140, 150) are made of a copper alloy with good electrical conductivity and corrosion resistance in order to ensure the reliability of the electrical connection with the substrate, external terminals, etc., but are not limited to this, and may be made of any other metal as long as the reliability of the electrical connection can be ensured. In addition, when viewed from the front, one relay terminal 140 is formed in a substantially U-shape, and the other relay terminal 150 is formed in a substantially L-shape, but are not limited to this, and the relay terminals (140, 150) may be of any shape as long as they can be electrically connected to the substrate, external terminals, etc. In addition, the recesses (146, 156) are in the form of a groove extending linearly, but are not limited to this, and the recesses (146, 156) are recessed downward, and may be of any shape as long as a part of the molten terminal portion 130 can enter inside and be joined as described later.

では次に、図３を参照して、溶断部１２０に連結された端子部１３０を、中継端子（１４０、１５０）に連結固定する方法について説明する。また、端子部１３０を、中継端子（１４０、１５０）に連結固定する方法は、基板表面実装ヒューズ１００の各部材を組み付けて製造する方法の一部を構成している。 Next, referring to FIG. 3, a method for connecting and fixing the terminal portion 130 connected to the fusing portion 120 to the relay terminals (140, 150) will be described. The method for connecting and fixing the terminal portion 130 to the relay terminals (140, 150) constitutes part of the method for assembling and manufacturing the components of the substrate surface mount fuse 100.

図３に示すように、両側の端子部１３０のそれぞれを、一方の中継端子１４０の接続部１４１上に、及び他方の中継端子１５０の接続部１５１上に重ねる。端子部１３０の裏面は平坦面であり、接続部１４１及び接続部１５１も平坦面となっているので、両者は密着した状態で重ね合わせられる。次に、端子部１３０の上から、加熱された押圧板等の押圧手段を押しあて、端子部１３０に下方への押圧力Ｆを加える。すると、各端子部１３０は加熱されながら、中継端子１４０の接続部１４１及び中継端子１５０の接続部１５１へ向けて押圧されることになる。 As shown in FIG. 3, each of the terminal portions 130 on both sides is placed on the connection portion 141 of one relay terminal 140 and on the connection portion 151 of the other relay terminal 150. The back surface of the terminal portion 130 is flat, and the connection portions 141 and 151 are also flat, so that the two are placed on top of each other in close contact. Next, a pressing means such as a heated pressing plate is pressed against the terminal portion 130 from above, applying a downward pressing force F to the terminal portion 130. Then, while being heated, each terminal portion 130 is pressed toward the connection portion 141 of the relay terminal 140 and the connection portion 151 of the relay terminal 150.

ここで、端子部１３０は亜鉛合金によって形成されているため、端子部１３０の融点は約４２０度であり、中継端子（１４０、１５０）は銅合金によって形成されているため、中継端子（１４０、１５０）の融点は約１０８５度となっている。つまり、端子部１３０は、中継端子（１４０、１５０）よりも融点の低い金属から構成されている。そして、押圧板等によって端子部１３０を加熱しながら押圧する際に、加熱温度を、端子部１３０の融点以上で、中継端子（１４０、１５０）の融点よりも低い温度（例えば、６００度）に設定することで、端子部１３０は溶融するが、中継端子（１４０、１５０）は溶融しないことになる。すると、溶融した端子部１３０の一部が、中継端子１４０の凹部１４６及び中継端子１５０の凹部１５６に流れ込む。その後、加熱を止めることで、中継端子１４０の凹部１４６及び中継端子１５０の凹部１５６に流れ込んだ端子部１３０の一部が固化し、端子部１３０の一部が各凹部（１４６、１５６）と接合することになる。このように、端子部１３０の一部が、各凹部（１４６、１５６）周辺の凹凸部分に回り込むように入り込んで固化することで、両者が強く接合して、しっかりと固定されるのである。 Here, since the terminal portion 130 is made of a zinc alloy, the melting point of the terminal portion 130 is about 420 degrees, and since the relay terminals (140, 150) are made of a copper alloy, the melting point of the relay terminals (140, 150) is about 1085 degrees. In other words, the terminal portion 130 is made of a metal with a lower melting point than the relay terminals (140, 150). When the terminal portion 130 is pressed while being heated by a pressing plate or the like, the heating temperature is set to a temperature (e.g., 600 degrees) that is higher than the melting point of the terminal portion 130 and lower than the melting point of the relay terminals (140, 150), so that the terminal portion 130 melts but the relay terminals (140, 150) do not melt. Then, a part of the molten terminal portion 130 flows into the recess 146 of the relay terminal 140 and the recess 156 of the relay terminal 150. Then, by stopping the heating, the part of the terminal portion 130 that flowed into the recess 146 of the relay terminal 140 and the recess 156 of the relay terminal 150 solidifies, and the part of the terminal portion 130 bonds to each recess (146, 156). In this way, the part of the terminal portion 130 wraps around the uneven parts around each recess (146, 156) and solidifies, so that the two are strongly bonded and firmly fixed.

特に、加熱しながら押圧することで、溶融した端子部１３０の一部が、中継端子１４０の凹部１４６及び中継端子１５０の凹部１５６に確実に流れ込むので、より強固に接合ができるのである。また、加熱しながら押圧する箇所を、端子部１３０のみに限定する、つまり、端子部１３０側のみに直接、熱や圧力を加え、接続部（１４１、１５１）側には直接、熱や圧力を加えないことで、効率的に接合作業を行える。また、端子部１３０の裏面は平坦面であり、接続部１４１及び接続部１５１も平坦面となっているので、その平坦面から下方へ窪んだ凹部（１４６、１５６）に、溶融した端子部１３０の一部が流れ込みやすい。 In particular, by applying pressure while heating, a portion of the molten terminal portion 130 reliably flows into the recess 146 of the relay terminal 140 and the recess 156 of the relay terminal 150, allowing for a stronger bond. In addition, by limiting the portion to be pressed while heating only to the terminal portion 130, that is, by applying heat and pressure directly only to the terminal portion 130 side and not directly to the connection portion (141, 151) side, the bonding operation can be performed efficiently. In addition, since the back surface of the terminal portion 130 is a flat surface, and the connection portions 141 and 151 are also flat surfaces, a portion of the molten terminal portion 130 easily flows into the recesses (146, 156) recessed downward from the flat surfaces.

なお、図３では、押圧板等によって端子部１３０を加熱しながら押圧していたが、これに限定されない。例えば、端子部１３０に超音波や温風等をあてて加熱するなど、任意の加熱手段によって加熱してもよい。そして、加熱手段とは別に、端子部１３０を押圧する押圧出段を備えてもよい。なお、押圧出段を備えない場合は、端子部１３０自体の自重によって下方へ押圧して、溶融した端子部１３０の一部を、中継端子１４０の凹部１４６及び中継端子１５０の凹部１５６に流れ込ませて接合させてもよい。 In FIG. 3, the terminal portion 130 is pressed while being heated by a pressing plate or the like, but this is not limited to this. For example, the terminal portion 130 may be heated by any heating means, such as by applying ultrasonic waves or hot air to the terminal portion 130. A pressing step for pressing the terminal portion 130 may be provided separately from the heating means. In addition, if a pressing step is not provided, the terminal portion 130 may be pressed downward by its own weight, and a part of the molten terminal portion 130 may flow into the recess 146 of the relay terminal 140 and the recess 156 of the relay terminal 150 to be joined.

また、加熱温度を、端子部１３０の融点以上で、中継端子（１４０、１５０）の融点よりも低い温度に設定することで、端子部１３０を中継端子（１４０、１５０）に確実に接合させることができる。仮に、加熱温度を、端子部１３０の融点以上で、尚且つ、中継端子（１４０、１５０）の融点以上に設定して、両者を溶接しようとする場合、亜鉛合金の端子部１３０の融点は約４２０度であり、銅合金の中継端子（１４０、１５０）の融点は約１０８５度となっているので、銅合金の中継端子（１４０、１５０）が融点に達する前に、中継端子（１４０、１５０）に比べて融点が大きく低い亜鉛合金の端子部１３０が先に気化してしまう。そのため、融点が大きく異なる亜鉛合金の端子部１３０と、銅合金の中継端子（１４０、１５０）とは、互いに溶接することは難しい。 In addition, by setting the heating temperature to a temperature equal to or higher than the melting point of the terminal portion 130 and lower than the melting point of the relay terminal (140, 150), the terminal portion 130 can be reliably joined to the relay terminal (140, 150). If the heating temperature is set to a temperature equal to or higher than the melting point of the terminal portion 130 and equal to or higher than the melting point of the relay terminal (140, 150) to weld the two, the melting point of the zinc alloy terminal portion 130 is about 420 degrees, and the melting point of the copper alloy relay terminal (140, 150) is about 1085 degrees, so before the copper alloy relay terminal (140, 150) reaches its melting point, the zinc alloy terminal portion 130, which has a melting point significantly lower than that of the relay terminal (140, 150), will vaporize first. Therefore, it is difficult to weld the zinc alloy terminal portion 130 and the copper alloy relay terminal (140, 150), which have significantly different melting points, to each other.

なお、端子部１３０を亜鉛合金で構成し、中継端子（１４０、１５０）を銅合金で構成しているが、これに限定されず、中継端子（１４０、１５０）を構成する金属の融点が、端子部１３０を構成する金属の融点よりも高いのであれば、端子部１３０と中継端子（１４０、１５０）はそれぞれ任意の素材から構成してもよい。 Note that, although the terminal portion 130 is made of a zinc alloy and the relay terminals (140, 150) are made of a copper alloy, this is not limited thereto, and as long as the melting point of the metal constituting the relay terminals (140, 150) is higher than the melting point of the metal constituting the terminal portion 130, the terminal portion 130 and the relay terminals (140, 150) may each be made of any material.

次に、溶断部１２０を備えた端子部１３０と、中継端子（１４０、１５０）とを、接合させて固定した後に、図４に示すように、ハウジング１１０を取り付けて、基板表面実装ヒューズ１００の組み立てを完成させる。図４に示すように、基板表面実装ヒューズ１００のハウジング１１０は、溶断部１２０と端子部１３０を内部に収容しており、端子部１３０に連結固定された中継端子（１４０、１５０）は、ハウジング１１０から下方へ延出している。このように、組み立てられて製造された基板表面実装ヒューズ１００では、ハウジング１１０内に収容された溶断部１２０、端子部１３０、中継端子（１４０、１５０）が、一体となっている。 Next, the terminal portion 130 with the fusing portion 120 and the relay terminals (140, 150) are joined and fixed, and then the housing 110 is attached as shown in FIG. 4 to complete the assembly of the substrate surface-mounted fuse 100. As shown in FIG. 4, the housing 110 of the substrate surface-mounted fuse 100 accommodates the fusing portion 120 and the terminal portion 130 therein, and the relay terminals (140, 150) connected and fixed to the terminal portion 130 extend downward from the housing 110. In the substrate surface-mounted fuse 100 thus assembled and manufactured, the fusing portion 120, the terminal portion 130, and the relay terminals (140, 150) accommodated within the housing 110 are integrated.

次に、図５及び図６に、組み立てられて製造された基板表面実装ヒューズ１００を、基板３００に取り付けて実装した状態を示す。なお、図５は、基板表面実装ヒューズ１００を基板３００に取り付ける前の状態の全体斜視図、図６は、基板表面実装ヒューズ１００を基板３００に取り付けた状態の全体斜視図である。 Next, Figures 5 and 6 show the assembled and manufactured substrate surface-mounted fuse 100 mounted on a substrate 300. Note that Figure 5 is an overall perspective view of the substrate surface-mounted fuse 100 before it is mounted on the substrate 300, and Figure 6 is an overall perspective view of the substrate surface-mounted fuse 100 mounted on the substrate 300.

図５に示すように、基板３００は、ヒューズボックス等の一部に設けられており、自動車等に搭載されている電気回路に電気的に接続されている。そして、当該電気回路に接続された複数の電極３１０が、基板３００の表面上に設けられている。また、外部端子と接続するために、基板表面実装ヒューズ１００の中継端子１５０の脚部１５２が挿通可能な挿通孔３２０が、電極３１０と相対する位置に設けられている。そして、基板表面実装ヒューズ１００を基板３００に取り付けて実装する際は、基板表面実装ヒューズ１００の一方の中継端子１４０の平坦な固定部１４３を電極３１０の表面に密着させ、当該密着部分をハンダ付け等の方法で固定する。また、基板表面実装ヒューズ１００の他方の中継端子１５０の脚部１５２を基板３００の挿通孔３２０へ挿通させ、中継端子１５０の脚部１５２が基板３００の裏面へと突出するように取り付ける。すると、図６に示すように、基板表面実装ヒューズ１００が基板３００に取り付けられて実装された状態となる。 As shown in FIG. 5, the substrate 300 is provided in a part of a fuse box or the like, and is electrically connected to an electric circuit mounted on an automobile or the like. A plurality of electrodes 310 connected to the electric circuit are provided on the surface of the substrate 300. In addition, in order to connect to an external terminal, an insertion hole 320 through which the leg 152 of the relay terminal 150 of the substrate surface-mounted fuse 100 can be inserted is provided at a position opposite the electrode 310. When the substrate surface-mounted fuse 100 is mounted on the substrate 300, the flat fixing portion 143 of one relay terminal 140 of the substrate surface-mounted fuse 100 is brought into close contact with the surface of the electrode 310, and the contact portion is fixed by a method such as soldering. In addition, the leg 152 of the other relay terminal 150 of the substrate surface-mounted fuse 100 is inserted into the insertion hole 320 of the substrate 300, and the relay terminal 150 is attached so that the leg 152 protrudes to the back surface of the substrate 300. Then, as shown in FIG. 6, the substrate surface mount fuse 100 is attached and mounted on the substrate 300.

図６に示すように、基板表面実装ヒューズ１００の中継端子１５０の脚部１５２には、外部端子４００が取り付けられる。外部端子４００は、中継端子１５０の脚部１５２を挿入して電気的に接続可能な接続孔４２０と、外部の各種電装品に電気的に接続された接続線４１０とを備えている。そして、電気回路と外部の各種電装品は、電気回路に接続された電極３１０と、基板表面実装ヒューズ１００と、外部端子４００とを介して電気的に接続された状態となる。電極３１０に接続された電気回路に異常な過電流が流れると、基板表面実装ヒューズ１００の溶断部１２０が溶断して電気回路を遮断し、基板表面実装ヒューズ１００と外部端子４００を介して接続された各種電装品を保護している。なお、図６に示す基板表面実装ヒューズ１００では、一方の中継端子１４０が基板３００の電極３１０に接続され、他方の中継端子１５０が外部端子４００に接続されているが、これに限定されず、両方の中継端子（１４０、１５０）が、基板３００の相対する電極３１０に接続されるなど、任意の接続態様であってもよい。 As shown in FIG. 6, an external terminal 400 is attached to the leg 152 of the relay terminal 150 of the substrate surface mount fuse 100. The external terminal 400 has a connection hole 420 into which the leg 152 of the relay terminal 150 can be inserted for electrical connection, and a connection wire 410 electrically connected to various external electrical equipment. The electric circuit and the various external electrical equipment are electrically connected via the electrode 310 connected to the electric circuit, the substrate surface mount fuse 100, and the external terminal 400. When an abnormal overcurrent flows through the electric circuit connected to the electrode 310, the fusing portion 120 of the substrate surface mount fuse 100 melts to cut off the electric circuit, thereby protecting the various electrical equipment connected to the substrate surface mount fuse 100 via the external terminal 400. In the substrate surface-mounted fuse 100 shown in FIG. 6, one relay terminal 140 is connected to an electrode 310 of the substrate 300, and the other relay terminal 150 is connected to an external terminal 400, but this is not limited thereto, and any connection may be used, such as both relay terminals (140, 150) being connected to opposing electrodes 310 of the substrate 300.

このように、本願発明の基板表面実装ヒューズ１００によれば、中継端子（１４０、１５０）が基板表面実装ヒューズ１００に一体に設けられており、その中継端子（１４０、１５０）を、基板３００に直接取り付けることができる。そのため、従来のように、基板表面実装ヒューズと基板との間を中継して接続させるために、基板に音叉端子等を別途設ける必要がない。したがって、本願発明の基板表面実装ヒューズ１００によれば、音叉端子のような中継部材を別途用意する必要がなく、部品点数の削減に寄与し、基板表面実装ヒューズ１００及び基板３００を含めた構成全体（例えば、基板３００を備えるヒューズボックスなど）の軽量化及び低背化が可能となる。 In this way, according to the substrate surface-mounted fuse 100 of the present invention, the relay terminals (140, 150) are integrally provided on the substrate surface-mounted fuse 100, and the relay terminals (140, 150) can be directly attached to the substrate 300. Therefore, unlike the conventional method, it is not necessary to provide a separate tuning fork terminal or the like on the substrate to relay and connect between the substrate surface-mounted fuse and the substrate. Therefore, according to the substrate surface-mounted fuse 100 of the present invention, there is no need to separately prepare a relay member such as a tuning fork terminal, which contributes to reducing the number of parts and makes it possible to reduce the weight and height of the entire configuration including the substrate surface-mounted fuse 100 and the substrate 300 (for example, a fuse box including the substrate 300).

また、基板表面実装ヒューズ１００の溶断部１２０側を構成する素材には、溶断部１２０の所望の溶断特性が発揮できる金属が採用され、基板表面実装ヒューズ１００の中継端子（１４０、１５０）側を構成する素材には、基板３００や外部端子４００との電気的接続の信頼性を担保できる金属が採用されている。そのため、溶断部１２０側を構成する金属と中継端子（１４０、１５０）側を構成する金属とが、互いに異なる金属から構成されているため、異なる金属間での接続固定が難しい場合がある。例えば、上述したように、それぞれの金属の融点が大きく異なる場合は、溶接して互いに接続固定するのが難しい場合ある。そこで、本願発明の基板表面実装ヒューズ１００では、中継端子（１４０、１５０）に凹部（１４６、１５６）を設け、溶断部１２０側の端子部１３０の一部を凹部（１４６、１５６）に入り込ませるように接合している。そのため、溶断部１２０側の端子部１３０と中継端子（１４０、１５０）とが異なる金属から構成されていても、両者の接続固定が確実に実現できるのである。 In addition, the material constituting the fusing portion 120 side of the substrate surface-mounted fuse 100 is a metal that can exhibit the desired fusing characteristics of the fusing portion 120, and the material constituting the relay terminal (140, 150) side of the substrate surface-mounted fuse 100 is a metal that can ensure the reliability of the electrical connection with the substrate 300 and the external terminal 400. Therefore, since the metal constituting the fusing portion 120 side and the metal constituting the relay terminal (140, 150) side are made of different metals, it may be difficult to connect and fix the different metals. For example, as described above, if the melting points of the respective metals are significantly different, it may be difficult to connect and fix them to each other by welding. Therefore, in the substrate surface-mounted fuse 100 of the present invention, recesses (146, 156) are provided in the relay terminals (140, 150), and a part of the terminal portion 130 on the fusing portion 120 side is joined so as to enter the recesses (146, 156). Therefore, even if the terminal portion 130 on the fusing portion 120 side and the relay terminals (140, 150) are made of different metals, the two can be reliably connected and fixed.

なお、本願発明の基板表面実装ヒューズ、及び、基板表面実装ヒューズの製造方法は、上記の実施例に限定されず、特許請求の範囲に記載された範囲、実施形態の範囲で、種々の変形例、組み合わせが可能であり、これらの変形例、組み合わせもその権利範囲に含むものである。 The surface mount fuse and method of manufacturing the surface mount fuse of the present invention are not limited to the above examples, and various modifications and combinations are possible within the scope of the claims and the scope of the embodiments, and these modifications and combinations are also included in the scope of the rights.

Claims (4)

ハウジングと、当該ハウジング内に配置される溶断部と、当該溶断部の両端に連結される端子部とを備えた、基板の表面に実装される基板表面実装ヒューズであって、
前記基板に接続される中継端子を備え、
前記中継端子は、前記端子部と接続される接続部を備え、
前記接続部には、凹部が形成されており、
前記凹部内に、前記端子部の一部が入り込んで接合していることを特徴とする、基板表面実装ヒューズ。
 A substrate surface mount fuse comprising a housing, a fusing portion disposed within the housing, and terminal portions connected to both ends of the fusing portion, the fuse being mounted on a surface of a substrate,
A relay terminal connected to the board is provided.
the relay terminal includes a connection portion connected to the terminal portion,
The connection portion has a recess formed therein,
A surface mount fuse, characterized in that a part of the terminal portion is inserted into and joined to the recess.
 前記中継端子の接続部を構成する金属の融点が、前記端子部を構成する金属の融点よりも高いことを特徴とする請求項１に記載の基板表面実装ヒューズ。
 2. The substrate surface mount fuse according to claim 1, wherein the melting point of the metal constituting the connection portion of the relay terminal is higher than the melting point of the metal constituting the terminal portion.
 前記端子部を構成する金属は、亜鉛合金であり、
前記中継端子の前記接続部を構成する金属は、銅合金であることを特徴とする、請求項２に記載の基板表面実装ヒューズ。
 the metal constituting the terminal portion is a zinc alloy,
3. The substrate surface mount fuse according to claim 2, wherein the metal constituting the connection portion of the relay terminal is a copper alloy.
 請求項１から３のいずれかに記載の基板表面実装ヒューズの製造方法であって、
前記端子部の一部を加圧しながら加熱することで、前記凹部内に接合させることを特徴とする基板表面実装ヒューズの製造方法。 4. A method for manufacturing a substrate surface mount fuse according to claim 1, comprising the steps of:
A method of manufacturing a surface mount fuse, comprising the steps of: applying pressure to a portion of the terminal portion while heating the portion, thereby bonding the portion into the recess portion.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001327043A (en) 2000-05-10 2001-11-22 Hitachi Cable Ltd Terminal-welded laminated bus bar
JP2002163974A (en) 2000-11-22 2002-06-07 Taiheiyo Seiko Kk Blade type fuse
JP2010033790A (en) 2008-07-28 2010-02-12 Panasonic Corp Electronic component and method of manufacturing same
JP2015185243A (en) 2014-03-20 2015-10-22 住友電装株式会社 Tuning-fork terminal

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4537329B1 (en) * 1967-08-28 1970-11-27
JP2747506B2 (en) * 1992-04-02 1998-05-06 矢崎総業株式会社 Resistance welding method for dissimilar metal terminals

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001327043A (en) 2000-05-10 2001-11-22 Hitachi Cable Ltd Terminal-welded laminated bus bar
JP2002163974A (en) 2000-11-22 2002-06-07 Taiheiyo Seiko Kk Blade type fuse
JP2010033790A (en) 2008-07-28 2010-02-12 Panasonic Corp Electronic component and method of manufacturing same
JP2015185243A (en) 2014-03-20 2015-10-22 住友電装株式会社 Tuning-fork terminal

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