JP2013161718A - Connection terminal and connection terminal unit - Google Patents

Connection terminal and connection terminal unit Download PDF

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JP2013161718A
JP2013161718A JP2012024319A JP2012024319A JP2013161718A JP 2013161718 A JP2013161718 A JP 2013161718A JP 2012024319 A JP2012024319 A JP 2012024319A JP 2012024319 A JP2012024319 A JP 2012024319A JP 2013161718 A JP2013161718 A JP 2013161718A
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connection terminal
elastic
extending
base
portions
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JP5856864B2 (en
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Takahiro Fujii
貴広 藤井
Koji Ishikawa
浩嗣 石川
Keiichi Ito
敬一 伊藤
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NHK Spring Co Ltd
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NHK Spring Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/481—Disposition
    • H01L2224/48135—Connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip
    • H01L2224/48137—Connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip the bodies being arranged next to each other, e.g. on a common substrate
    • H01L2224/48139—Connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip the bodies being arranged next to each other, e.g. on a common substrate with an intermediate bond, e.g. continuous wire daisy chain
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/49—Structure, shape, material or disposition of the wire connectors after the connecting process of a plurality of wire connectors
    • H01L2224/491—Disposition
    • H01L2224/4911—Disposition the connectors being bonded to at least one common bonding area, e.g. daisy chain
    • H01L2224/49111—Disposition the connectors being bonded to at least one common bonding area, e.g. daisy chain the connectors connecting two common bonding areas, e.g. Litz or braid wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/49—Structure, shape, material or disposition of the wire connectors after the connecting process of a plurality of wire connectors
    • H01L2224/491—Disposition
    • H01L2224/4911—Disposition the connectors being bonded to at least one common bonding area, e.g. daisy chain
    • H01L2224/49113—Disposition the connectors being bonded to at least one common bonding area, e.g. daisy chain the connectors connecting different bonding areas on the semiconductor or solid-state body to a common bonding area outside the body, e.g. converging wires

Abstract

PROBLEM TO BE SOLVED: To provide a connection terminal and a connection terminal unit which can establish stable conduction between contact objects and also have excellent spring properties and heat dissipation properties.SOLUTION: A conductive connection terminal 10 for connecting different boards together comprises: a base 11 which comes into contact with a connection terminal holder for holding the connection terminal 10; a first elastic part 12 which extends in a belt-like shape from one end of the base 11, and which is elastically deformable by an externally applied load, while making contact with one of the boards; and a second elastic part 13 which extends from the other end of the base 11 in a direction opposite to the extension direction of the first elastic part 12, and which is elastically deformable by the externally applied load, while making contact with the other board.

Description

本発明は、パワーモジュールに用いられる接続端子および接続端子ユニットに関するものである。   The present invention relates to a connection terminal and a connection terminal unit used in a power module.

従来より、産業用、自動車用などの電力制御からモータ制御まで、幅広い分野に使用される省エネルギー化のキーデバイスとして、パワーモジュールが挙げられる。このパワーモジュールは、複数の半導体チップが積載された基板と、その基板の各半導体にそれぞれ接続されて電力の入出力を行う複数の接続端子と、接続端子をそれぞれ保持する接続端子ホルダとを備える。   Conventionally, a power module is a key device for energy saving used in a wide range of fields from electric power control to motor control for industrial use and automobile use. The power module includes a substrate on which a plurality of semiconductor chips are stacked, a plurality of connection terminals that are connected to the respective semiconductors of the substrate to input and output power, and a connection terminal holder that holds the connection terminals. .

接続端子においては、外部の回路基板とパワーモジュールの基板との間の確実な電気的導通が求められる。この要望に対し、板状の接触ばねを用いて、外部の回路基板とパワーモジュールの基板との間を弾性力によって電気的に導通することが可能な接続端子が開示されている（例えば、特許文献１を参照）。この接続端子によれば、接触ばねを用いることによって、導体間距離のばらつき、温度変化、基板の反り等による導体間距離変動を吸収し、２つの接触対象物間の接触状態を維持することができる。   In the connection terminal, a reliable electrical continuity between the external circuit board and the power module board is required. In response to this demand, there has been disclosed a connection terminal capable of electrically connecting an external circuit board and a power module board by elastic force using a plate-like contact spring (for example, a patent). Reference 1). According to this connection terminal, by using the contact spring, it is possible to absorb the variation in the distance between the conductors due to the variation in the distance between the conductors, the temperature change, the warp of the substrate, etc., and maintain the contact state between the two contact objects. it can.

特開２００８−１９８５９７号公報JP 2008-198597 A

ところで、上述したパワーモジュールでは大電流を流すため、接続端子においても、その大電流に対応させなければならない。しかしながら、特許文献１が開示する接続端子では、例えば接続端子１本で２０〜３０Ａ程度の電流を流すに過ぎなかった。このため、１００Ａのような大電流を流す必要がある場合は、接続端子が５本必要であった。一方、接続端子１本で１００Ａの電流を流すために接続端子の板厚を厚くすると、ばね特性が確保できなくなる。   By the way, in the power module described above, since a large current flows, the connection terminal must be adapted to the large current. However, in the connection terminal disclosed in Patent Document 1, for example, a current of about 20 to 30 A is only passed through one connection terminal. For this reason, when it is necessary to flow a large current such as 100 A, five connection terminals are required. On the other hand, if the thickness of the connection terminal is increased in order to pass a current of 100 A with one connection terminal, the spring characteristics cannot be ensured.

また、良好な導電性を確保するために、通電により発生した熱を放熱することが挙げられるが、特許文献１が開示する接続端子では、放熱特性について考慮された構造にはなっておらず、例えば接続端子１本で２０〜３０Ａ程度の電流を導通させた場合であっても、発生した熱を効率よく放熱できずに、滞留する熱によって半導体チップの性能に悪影響を及ぼすおそれがあった。   In addition, in order to ensure good conductivity, it is possible to dissipate heat generated by energization, but the connection terminal disclosed in Patent Document 1 does not have a structure that takes heat dissipation characteristics into consideration, For example, even when a current of about 20 to 30 A is conducted with one connection terminal, the generated heat cannot be radiated efficiently, and the accumulated heat may adversely affect the performance of the semiconductor chip.

また、特許文献１が開示する接続端子では、接触対象に対して、１つの接触ばねにより両端で接触するため、例えば外部の回路基板に反りや、振動等による変形がある場合、接触ばねの撓みにより接触ばねの荷重が変化し、パワーモジュールの基板側の接触にも影響を及ぼし、電気的導通が不安定になるおそれがあった。   In addition, since the connection terminal disclosed in Patent Document 1 is in contact with the contact target at both ends by one contact spring, for example, when the external circuit board is warped or deformed due to vibration or the like, the contact spring is bent. As a result, the load of the contact spring changes, which also affects the contact on the substrate side of the power module, which may cause unstable electrical continuity.

本発明は、上記に鑑みてなされたものであって、接触対象間で安定した導通を実現することができるとともに、良好なばね特性および放熱特性を有する接続端子および接続端子ユニットを提供することを目的とする。   The present invention has been made in view of the above, and provides a connection terminal and a connection terminal unit that can realize stable conduction between contact objects and have good spring characteristics and heat dissipation characteristics. Objective.

上述した課題を解決し、目的を達成するために、本発明にかかる接続端子は、異なる基板間を接続する導電性の接続端子であって、当該接続端子を保持する接続端子ホルダと接触する基部と、前記基部の一端から帯状をなして延び、一方の基板と接触するとともに、外部から加わる荷重に対して弾性変形可能な第１弾性部と、前記基部の他端から前記第１弾性部が延びる方向と反対方向に延び、他方の基板と接触するとともに、外部から加わる荷重に対して弾性変形可能な第２弾性部と、を備えたことを特徴とする。   In order to solve the above-described problems and achieve the object, the connection terminal according to the present invention is a conductive connection terminal that connects different substrates, and is a base that contacts a connection terminal holder that holds the connection terminal. A first elastic portion extending from one end of the base portion in contact with one substrate and elastically deformable with respect to a load applied from the outside, and the first elastic portion from the other end of the base portion. And a second elastic portion that extends in a direction opposite to the extending direction, contacts the other substrate, and is elastically deformable with respect to a load applied from the outside.

また、本発明にかかる接続端子は、上記の発明において、前記基部は、略平板状をなす平板部と、前記第１および第２弾性部が延びる方向と直交する方向に延出する２つの第１延出部と、を備えたことを特徴とする。   In the connection terminal according to the present invention, in the above invention, the base portion includes a flat plate portion having a substantially flat plate shape, and two second extensions extending in a direction orthogonal to a direction in which the first and second elastic portions extend. And 1 extension part.

また、本発明にかかる接続端子は、上記の発明において、前記第１延出部は、先端部分が前記平板部の主面に対して直交する方向にそれぞれ湾曲されていることを特徴とする。   In the connection terminal according to the present invention as set forth in the invention described above, the first extending portion has a distal end portion curved in a direction orthogonal to the main surface of the flat plate portion.

また、本発明にかかる接続端子は、上記の発明において、前記基部は、前記２つの第１延出部の各々に隣接して設けられ、前記第１延出部が延びる側面から延出する２つの第２延出部を有し、前記２つの第２延出部の先端の間の距離は、前記２つの第１延出部の先端の間の距離より大きいことを特徴とする。   In the connecting terminal according to the present invention, in the above invention, the base portion is provided adjacent to each of the two first extending portions, and extends from a side surface on which the first extending portion extends. There are two second extending portions, and a distance between the tips of the two second extending portions is larger than a distance between the tips of the two first extending portions.

また、本発明にかかる接続端子は、上記の発明において、前記第１弾性部の幅は、前記第２弾性部の幅より大きいことを特徴とする。   In the connection terminal according to the present invention, the width of the first elastic portion is larger than the width of the second elastic portion.

また、本発明にかかる接続端子は、上記の発明において、前記第１および第２弾性部は、板面に対して直交する方向に湾曲した形状をなすことを特徴とする。   The connection terminal according to the present invention is characterized in that, in the above invention, the first and second elastic portions have a shape curved in a direction perpendicular to the plate surface.

また、本発明にかかる接続端子は、上記の発明において、前記第１および第２弾性部は、前記平板部の主面を通過する平面上で凹凸が逆の湾曲部分を繰り返した形状をなすことを特徴とする。   Further, in the connection terminal according to the present invention, in the above invention, the first and second elastic portions have a shape in which a curved portion having concavities and convexities is repeated on a plane passing through the main surface of the flat plate portion. It is characterized by.

また、本発明にかかる接続端子ユニットは、上記の発明にかかる接続端子と、前記接続端子を収容する収容部を有する接続端子ホルダと、を備えたことを特徴とする。   Moreover, the connection terminal unit concerning this invention was equipped with the connection terminal concerning said invention, and the connection terminal holder which has an accommodating part which accommodates the said connection terminal, It is characterized by the above-mentioned.

また、本発明にかかる接続端子ユニットは、上記の発明において、前記基部は、略平板状をなす平板部と、前記第１および第２弾性部が延びる方向と直交する方向に延出する２つの第１延出部と、を有し、前記第１延出部が、前記収容部の内部壁面に接触することを特徴とする。   Further, in the connection terminal unit according to the present invention, in the above invention, the base portion includes two substantially flat plate-like plate portions and two directions extending in a direction orthogonal to a direction in which the first and second elastic portions extend. A first extending portion, wherein the first extending portion contacts an inner wall surface of the accommodating portion.

また、本発明にかかる接続端子ユニットは、上記の発明において、前記基部は、前記２つの第１延出部の各々に隣接して設けられ、前記第１延出部が延びる側面から延出する２つの第２延出部を有し、前記収容部は、一方の端面に開口を有する大径部、および該大径部よりも径が小さく、他方の端面に開口を有する小径部からなる段付き孔形状をなし、前記２つの第２延出部の先端の間の距離は、前記２つの第１延出部の先端の間の距離より大きく、前記第１延出部が、前記小径部の内部壁面に接触し、前記第２延出部が、前記大径部と前記小径部とがなす段部に当接することを特徴とする。   In the connection terminal unit according to the present invention as set forth in the invention described above, the base portion is provided adjacent to each of the two first extending portions, and extends from a side surface on which the first extending portion extends. The second housing has two second extending portions, and the accommodating portion includes a large diameter portion having an opening on one end surface, and a small diameter portion having a diameter smaller than the large diameter portion and having an opening on the other end surface. It forms a perforated shape, the distance between the tips of the two second extending portions is larger than the distance between the tips of the two first extending portions, and the first extending portion is the small diameter portion. The second extending portion is in contact with a step portion formed by the large diameter portion and the small diameter portion.

また、本発明にかかる接続端子ユニットは、上記の発明において、前記小径部は、内部壁面の一部が金属材料からなることを特徴とする。   In the connection terminal unit according to the present invention as set forth in the invention described above, a part of the inner wall surface of the small diameter portion is made of a metal material.

また、本発明にかかる接続端子ユニットは、上記の発明において、前記接続端子は、前記接続端子ホルダと一体成型されることを特徴とする。   In the connection terminal unit according to the present invention as set forth in the invention described above, the connection terminal is integrally formed with the connection terminal holder.

本発明によれば、接続端子ホルダに固定される基部に対して、電極等と接触し、その荷重に応じて弾性変形する第１および第２弾性部を別個設けることによって電気的導通を確保するとともに、それぞれに加わる荷重に対して弾性変形するようにし、第１および第２弾性部間に配設される基部によって通電により発生した熱を外部に放出するようにしたので、接触対象間で安定した導通を実現することができるとともに、良好なばね特性および放熱特性を有するという効果を奏する。   According to the present invention, electrical continuity is ensured by separately providing the first and second elastic portions that are in contact with the electrode and the like and elastically deform according to the load with respect to the base portion fixed to the connection terminal holder. At the same time, it is elastically deformed with respect to the load applied to each, and the heat generated by energization is released to the outside by the base disposed between the first and second elastic portions, so that it is stable between contact objects. It is possible to realize the conduction that has been achieved and to have good spring characteristics and heat dissipation characteristics.

図１は、本発明の実施の形態１にかかるパワーモジュールの構成を示す斜視図である。FIG. 1 is a perspective view showing a configuration of a power module according to Embodiment 1 of the present invention. 図２は、図１に示すパワーモジュールの要部の構成を示す分解斜視図である。FIG. 2 is an exploded perspective view showing a configuration of a main part of the power module shown in FIG. 図３は、本発明の実施の形態１にかかるパワーモジュールの接続端子を示す側面図である。FIG. 3 is a side view showing the connection terminals of the power module according to the first embodiment of the present invention. 図４は、図１に示すパワーモジュールの要部の構成を示す断面斜視図である。4 is a cross-sectional perspective view showing a configuration of a main part of the power module shown in FIG. 図５は、図１に示すパワーモジュールの要部の構成を示す断面斜視図である。FIG. 5 is a cross-sectional perspective view showing a configuration of a main part of the power module shown in FIG. 図６は、本発明の実施の形態１にかかるパワーモジュールの接続端子への荷重が非荷重の場合を示す図である。FIG. 6 is a diagram illustrating a case where the load on the connection terminal of the power module according to the first embodiment of the present invention is not loaded. 図７は、本発明の実施の形態１にかかるパワーモジュールの接続端子に荷重が加わった場合を示す図である。FIG. 7 is a diagram illustrating a case where a load is applied to the connection terminal of the power module according to the first embodiment of the present invention. 図８は、本発明の実施の形態１の変形例１−１にかかる接続端子を示す側面図である。FIG. 8 is a side view showing the connection terminal according to the modified example 1-1 of the first embodiment of the present invention. 図９は、本発明の実施の形態１の変形例１−２にかかる接続端子を示す側面図である。FIG. 9 is a side view showing the connection terminals according to the modified example 1-2 of the first embodiment of the present invention. 図１０は、本発明の実施の形態１の変形例１−３にかかるパワーモジュールの要部の構成を示す断面斜視図である。FIG. 10 is a cross-sectional perspective view showing the configuration of the main part of the power module according to Modification 1-3 of Embodiment 1 of the present invention. 図１１は、本発明の実施の形態１の変形例１−３にかかるパワーモジュールの要部の構成を示す断面斜視図である。FIG. 11 is a cross-sectional perspective view showing the configuration of the main part of the power module according to Modification 1-3 of Embodiment 1 of the present invention. 図１２は、本発明の実施の形態２にかかるパワーモジュールの構成を示す斜視図である。FIG. 12 is a perspective view showing the configuration of the power module according to the second embodiment of the present invention. 図１３は、図１２に示すパワーモジュールの要部の構成を示す断面斜視図である。FIG. 13 is a cross-sectional perspective view showing a configuration of a main part of the power module shown in FIG. 図１４は、図１２に示すパワーモジュールの要部の構成を示す断面斜視図である。FIG. 14 is a cross-sectional perspective view showing a configuration of a main part of the power module shown in FIG.

以下、本発明を実施するための形態を図面と共に詳細に説明する。なお、以下の実施の形態により本発明が限定されるものではない。また、以下の説明において参照する各図は、本発明の内容を理解でき得る程度に形状、大きさ、および位置関係を概略的に示してあるに過ぎない。すなわち、本発明は各図で例示された形状、大きさ、および位置関係のみに限定されるものではない。なお、以下の説明では、接続端子ユニットの例としてパワーモジュールを説明する。   DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by the following embodiment. The drawings referred to in the following description only schematically show the shape, size, and positional relationship so that the contents of the present invention can be understood. That is, the present invention is not limited only to the shape, size, and positional relationship illustrated in each drawing. In the following description, a power module will be described as an example of the connection terminal unit.

（実施の形態１）
図１は、本実施の形態１にかかるパワーモジュール１の構成を示す斜視図である。また、図２は、図１に示すパワーモジュール１の要部の構成を示す分解斜視図である。図１，２に示すパワーモジュール１は、接触対象とそれぞれ接続して電力の入出力を行う複数の接続端子１０と、複数の接続端子１０をそれぞれ収容して保持する収容部２１を複数有する接続端子ホルダ２０と、複数の半導体チップＤが積載された基板３０と、を備える。 (Embodiment 1)
FIG. 1 is a perspective view showing the configuration of the power module 1 according to the first embodiment. FIG. 2 is an exploded perspective view showing a configuration of a main part of the power module 1 shown in FIG. The power module 1 shown in FIGS. 1 and 2 is a connection having a plurality of connection terminals 10 that respectively connect to a contact object and input / output power, and a plurality of accommodating portions 21 that respectively accommodate and hold the plurality of connection terminals 10. A terminal holder 20 and a substrate 30 on which a plurality of semiconductor chips D are stacked are provided.

接続端子ホルダ２０は、ＰＰＳ（ポリフェニレンサルファイド樹脂）、ＬＣＰ（液晶ポリマー）、ＰＰＥ（ポリフェニレンエーテル樹脂）などの樹脂、マシナブルセラミックスなどの絶縁性材料を用いて形成され、接続端子１０を所定パターンで収容して固定するための略矩形をなす収容部２１を有する。収容部２１は、略円の断面を有する柱状空間であって、配設する接続端子１０に対応して設けられ、接続端子１０の先端が接続端子ホルダ２０の上面から突出するように接続端子１０を収容する。なお、接続端子ホルダ２０は、空気よりも熱伝導率の高い材料を用いて形成される。   The connection terminal holder 20 is formed using an insulating material such as a resin such as PPS (polyphenylene sulfide resin), LCP (liquid crystal polymer), or PPE (polyphenylene ether resin), machinable ceramics, and the connection terminal 10 in a predetermined pattern. It has the accommodating part 21 which makes the substantially rectangular shape for accommodating and fixing. The accommodating portion 21 is a columnar space having a substantially circular cross section, is provided corresponding to the connecting terminal 10 to be disposed, and the connecting terminal 10 has a tip protruding from the upper surface of the connecting terminal holder 20. To accommodate. The connection terminal holder 20 is formed using a material having a higher thermal conductivity than air.

基板３０は、絶縁性の樹脂、またはセラミックスなどの絶縁性材料を用いて形成され、所定の機能を有する複数の半導体チップＤおよびこの半導体チップＤに接続される電極Ｅを有する。なお、基板３０は、金属板上に絶縁層を形成し、絶縁層上に配線パターンを形成するものであってもよい。   The substrate 30 is formed using an insulating resin or an insulating material such as ceramics, and includes a plurality of semiconductor chips D having a predetermined function and electrodes E connected to the semiconductor chips D. In addition, the board | substrate 30 may form an insulating layer on a metal plate, and may form a wiring pattern on an insulating layer.

半導体チップＤは、ダイオード、トランジスタ、ＩＧＢＴ（絶縁ゲートバイポーラトランジスタ）等の半導体素子によって実現される。なお、半導体チップＤは、使用の目的に合わせて基板３０上に複数個設けられる。   The semiconductor chip D is realized by a semiconductor element such as a diode, a transistor, or an IGBT (insulated gate bipolar transistor). A plurality of semiconductor chips D are provided on the substrate 30 in accordance with the purpose of use.

電極Ｅは、銅などを用いてパターニングすることによって、基板３０に積載された半導体チップＤなどに対して電気信号を伝達させるための回路パターンを形成する。半導体チップＤと電極Ｅとは、ワイヤーＷによって電気的に接続している。   The electrode E is patterned using copper or the like to form a circuit pattern for transmitting an electrical signal to the semiconductor chip D or the like mounted on the substrate 30. The semiconductor chip D and the electrode E are electrically connected by a wire W.

なお、接続端子ホルダ２０と基板３０とは、ネジ等によって接続されてもよく、接着剤またはシール部材によって接着されてもよい。すなわち、接続端子ホルダ２０と基板３０との接続形態は、電極と接続端子との接触を妨げなければ、如何なる接続形態でもよい。   The connection terminal holder 20 and the substrate 30 may be connected by screws or the like, or may be bonded by an adhesive or a seal member. That is, the connection form between the connection terminal holder 20 and the substrate 30 may be any connection form as long as the contact between the electrode and the connection terminal is not hindered.

図３は、本実施の形態１にかかるパワーモジュール１の接続端子１０を示す側面図である。図４は、図１に示すパワーモジュール１の要部の構成を示す断面斜視図である。図５は、図１に示すパワーモジュール１の要部の構成を示す断面斜視図である。図３〜５に示す接続端子１０は、りん青銅、クロム銅、ベリリウム銅またはコルソン銅などの銅合金からなる平板状の材料が用いられ、主面に沿って湾曲された形状をなす。   FIG. 3 is a side view showing the connection terminal 10 of the power module 1 according to the first embodiment. 4 is a cross-sectional perspective view showing a configuration of a main part of the power module 1 shown in FIG. FIG. 5 is a cross-sectional perspective view showing a configuration of a main part of the power module 1 shown in FIG. 3 to 5 is made of a flat plate material made of a copper alloy such as phosphor bronze, chromium copper, beryllium copper, or Corson copper, and has a curved shape along the main surface.

接続端子１０は、接続端子ホルダ２０に保持されて固定される基部１１と、基部１１の一端から帯状をなして延び、一方の基板と接触するとともに、外部から加わる荷重に対して弾性変形可能な第１弾性部１２と、基部１１の他端から第１弾性部１２が延びる方向と反対方向に延び、他方の基板と接触するとともに、外部から加わる荷重に対して弾性変形可能な第２弾性部１３と、を備える。第１弾性部１２は、基部１１の一端の側面から基部１１の幅より小さい幅の帯状をなして延びている。また、第２弾性部１３は、基部１１の他端の側面（第１弾性部１２と反対側の側面）から基部１１の幅と略同等の幅の帯状をなして延びている。   The connection terminal 10 is held and fixed to the connection terminal holder 20 and extends in a band shape from one end of the base 11 so as to be in contact with one substrate and elastically deformed against a load applied from the outside. A first elastic portion 12 and a second elastic portion that extends in the direction opposite to the direction in which the first elastic portion 12 extends from the other end of the base 11, contacts the other substrate, and is elastically deformable with respect to a load applied from the outside. 13. The first elastic portion 12 extends from a side surface of one end of the base portion 11 in a band shape having a width smaller than the width of the base portion 11. The second elastic portion 13 extends from the side surface of the other end of the base portion 11 (side surface opposite to the first elastic portion 12) in a band shape having a width substantially equal to the width of the base portion 11.

基部１１は、矩形をなす略平板状の平板部１１ａと、平板部１１ａの第１弾性部１２および第２弾性部１３に連なる側面と直交する側面（平板部１１ａの幅方向の側面）の第１弾性部１２側からそれぞれ延出し、先端側で平板部１１ａの主面に略直交する方向に湾曲された２つの第１延出部１１ｂと、２つの第１延出部１１ｂの各々に隣接して設けられ、第１延出部１１ｂの延出側面と同一側面の第２弾性部１３側からそれぞれ延出し、先端側で平板部１１ａの主面に略直交する方向に湾曲された２つの第２延出部１１ｃと、を有する。すなわち、接続端子１０において、２つの第１延出部１１ｂ間から幅方向と直交する方向に第１弾性部１２が延び、２つの第２延出部１１ｃ間から幅方向と直交する方向に第２弾性部１３が延びている。   The base portion 11 includes a substantially flat plate portion 11a having a rectangular shape, and side surfaces (side surfaces in the width direction of the plate portion 11a) orthogonal to the side surfaces of the flat plate portion 11a that are continuous with the first elastic portion 12 and the second elastic portion 13. Adjacent to each of the two first extending portions 11b and the two first extending portions 11b extending from the one elastic portion 12 side and curved in a direction substantially orthogonal to the main surface of the flat plate portion 11a on the tip side. Two extending from the second elastic portion 13 side of the same side surface as the extending side surface of the first extending portion 11b and curved in a direction substantially perpendicular to the main surface of the flat plate portion 11a at the tip side. 2nd extension part 11c. That is, in the connection terminal 10, the first elastic portion 12 extends in the direction orthogonal to the width direction from between the two first extension portions 11 b, and extends in the direction orthogonal to the width direction from between the two second extension portions 11 c. Two elastic portions 13 extend.

ここで、２つの第２延出部１１ｃの外縁間を結ぶ距離（平板部１１ａの板面と平行）は、２つの第１延出部１１ｂの外縁間を結ぶ距離と比して大きい。第１延出部１１ｂおよび第２延出部１１ｃは、接続端子１０を接続端子ホルダ２０から挿抜する際に把持される把持部としての機能を有する。   Here, the distance connecting the outer edges of the two second extending portions 11c (parallel to the plate surface of the flat plate portion 11a) is larger than the distance connecting the outer edges of the two first extending portions 11b. The first extending portion 11 b and the second extending portion 11 c have a function as a gripping portion that is gripped when the connection terminal 10 is inserted and removed from the connection terminal holder 20.

基部１１は、接続端子１０の構成要素のうち最も剛性が高く、外部から荷重が加わった際に接続端子１０を支持する支持部としての機能を有する。また、平板部１１ａには、平板部１１ａ（接続端子１０）の剛性を向上させるため、接続端子１０の短手方向（平板部１１ａの第１延出部１１ｂおよび第２延出部１１ｃが延びる辺と平行な方向）の中央部において長手方向（平板部１１ａの第１延出部１１ｂおよび第２延出部１１ｃが延びる辺と垂直な方向）に凸成形されて延びる凸部を形成してもよい。   The base 11 has the highest rigidity among the constituent elements of the connection terminal 10 and has a function as a support part that supports the connection terminal 10 when a load is applied from the outside. Moreover, in order to improve the rigidity of the flat plate part 11a (connection terminal 10), the short side direction of the connection terminal 10 (the first extension part 11b and the second extension part 11c of the flat plate part 11a extend to the flat plate part 11a. Forming a convex portion extending in the longitudinal direction (the direction perpendicular to the side in which the first extending portion 11b and the second extending portion 11c of the flat plate portion 11a extend) in the central portion of the central portion in the direction parallel to the side). Also good.

収容部２１は、貫通方向に沿って径が異なる段付き孔形状をなしている（図４，５参照）。すなわち、収容部２１は、接続端子ホルダ２０の上端面に開口を有する大径部２１１と、この大径部２１１よりも径が小さく、下端面に開口を有する小径部２１２と、からなる。大径部２１１は、小径部２１２の径と比して大きく、かつ２つの第２延出部１１ｃの外縁間を結ぶ距離と比して若干大きい径である。小径部２１２は、第１弾性部１２の幅と比して大きく、かつ２つの第１延出部１１ｂの外縁間を結ぶ距離と比して同等または若干小さい径である。   The accommodating portion 21 has a stepped hole shape with different diameters along the penetration direction (see FIGS. 4 and 5). That is, the accommodating portion 21 includes a large diameter portion 211 having an opening on the upper end surface of the connection terminal holder 20 and a small diameter portion 212 having a diameter smaller than that of the large diameter portion 211 and having an opening on the lower end surface. The large diameter portion 211 has a diameter that is larger than the diameter of the small diameter portion 212 and slightly larger than the distance connecting the outer edges of the two second extending portions 11c. The small diameter portion 212 has a diameter that is larger than the width of the first elastic portion 12 and is equal to or slightly smaller than the distance connecting the outer edges of the two first extending portions 11b.

図４，５に示すように、接続端子１０が収容部２１に収容された場合、第１延出部１１ｂが小径部２１２内に収容されるとともに、第２延出部１１ｃが大径部２１１および小径部２１２とがなす段部に当接する。これにより、接続端子１０の接続端子ホルダ２０に対する配設高さを決定することができる。ここで、２つの第２延出部１１ｃの外縁間を結ぶ距離は、大径部２１１の直径より小さく、かつ小径部２１２の直径より大きい。   As shown in FIGS. 4 and 5, when the connection terminal 10 is accommodated in the accommodating portion 21, the first extending portion 11 b is accommodated in the small diameter portion 212 and the second extending portion 11 c is in the large diameter portion 211. Further, it abuts on a step portion formed by the small diameter portion 212. Thereby, the arrangement | positioning height with respect to the connection terminal holder 20 of the connection terminal 10 can be determined. Here, the distance connecting the outer edges of the two second extending portions 11 c is smaller than the diameter of the large diameter portion 211 and larger than the diameter of the small diameter portion 212.

第１延出部１１ｂおよび第２延出部１１ｃは、基端（平板部１１ａの側面）から、平板部１１ａの主面を通過する平面と交わる方向にそれぞれ延びている。また、第１延出部１１ｂおよび第２延出部１１ｃは、平板部１１ａの主面を通過する平面に対し、同じ側に湾曲してそれぞれ延びている。ここで、第１延出部１１ｂの外周側面は、小径部２１２の内部壁面に沿った形状をなし、この開口面の直径と同等または若干大きい径のＲ形状をなすように湾曲している。なお、第１延出部１１ｂは、収容部２１の内部空間に対する挿入先端側（第１弾性部１２側）に設けられ、端部に向けて外縁間の距離が小さくなるよう面取りされていることが好ましい。   The 1st extension part 11b and the 2nd extension part 11c are each extended in the direction which cross | intersects the plane which passes along the main surface of the flat plate part 11a from the base end (side surface of the flat plate part 11a). Moreover, the 1st extension part 11b and the 2nd extension part 11c are each curved and extended to the same side with respect to the plane which passes along the main surface of the flat plate part 11a. Here, the outer peripheral side surface of the first extending portion 11b has a shape along the inner wall surface of the small diameter portion 212, and is curved so as to form an R shape having a diameter equal to or slightly larger than the diameter of the opening surface. In addition, the 1st extension part 11b is provided in the insertion front end side (1st elastic part 12 side) with respect to the internal space of the accommodating part 21, and is chamfered so that the distance between outer edges may become small toward an edge part. Is preferred.

また、第１延出部１１ｂにおいて、２つの第１延出部１１ｂの外縁間の距離を、収容部２１の端子収容部分の開口面の径と同等または若干大きくして、接続端子１０を収容部２１に収容した際に、第１延出部１１ｂが収容部２１の内部壁面に圧接することで、収容部２１に対して、接続端子１０を固定するとともに、接続端子１０の２つの第１延出部１１ｂの外縁間を結ぶ方向の位置決めを行うことができる。   Further, in the first extending portion 11b, the distance between the outer edges of the two first extending portions 11b is made equal to or slightly larger than the diameter of the opening surface of the terminal accommodating portion of the accommodating portion 21 to accommodate the connection terminal 10. When the first extension portion 11 b is pressed against the inner wall surface of the housing portion 21 when housed in the portion 21, the connection terminal 10 is fixed to the housing portion 21, and the two first terminals of the connection terminal 10 are fixed. Positioning in the direction connecting the outer edges of the extending portion 11b can be performed.

第１弾性部１２および第２弾性部１３は、板面に対して直交する方向に湾曲した形状をなしている。第１弾性部１２は、基部１１との連結側と異なる側の端部に設けられ、弧状をなし、接触対象の電極と接触する接触部１２ａを有する。第１弾性部１２は、自身が延伸する方向に荷重変動を発生させる外乱振動を含む荷重によって弾性変形する。また、第２弾性部１３は、第１弾性部１２と同様、基部１１との連結側と異なる側の端部に設けられ、弧状をなし、接触対象の電極と接触する接触部１３ａを有する。第２弾性部１３は、自身が延伸する方向に荷重変動を発生させる外乱振動を含む荷重によって弾性変形する。ここで、第２弾性部１３の幅（延伸方向および板厚方向に直交する方向の距離）は、第１弾性部１２の幅と比して大きい。第１弾性部１２の幅は、収容部２１の小径部２１２の径に応じて決められる。   The 1st elastic part 12 and the 2nd elastic part 13 have comprised the shape curved in the direction orthogonal to a plate surface. The 1st elastic part 12 is provided in the edge part on the side different from the connection side with the base part 11, has an arc shape, and has the contact part 12a which contacts the electrode of contact object. The first elastic portion 12 is elastically deformed by a load including a disturbance vibration that generates a load variation in a direction in which the first elastic portion 12 extends. Moreover, the 2nd elastic part 13 is provided in the edge part different from the connection side with the base 11 similarly to the 1st elastic part 12, has an arc shape, and has the contact part 13a which contacts the electrode of contact object. The second elastic portion 13 is elastically deformed by a load including a disturbance vibration that generates a load variation in a direction in which the second elastic portion 13 extends. Here, the width of the second elastic portion 13 (the distance in the direction orthogonal to the stretching direction and the plate thickness direction) is larger than the width of the first elastic portion 12. The width of the first elastic part 12 is determined according to the diameter of the small diameter part 212 of the accommodating part 21.

基部１１、第１弾性部１２および第２弾性部１３が、帯状の部材を用いて形成されることによって、一つの接続端子１０で、４０Ａ以上の電流を流すことが可能となる。例えば、基部１１、第１弾性部１２および第２弾性部１３の板厚（主面に直交する方向の長さ）を０．２ｍｍ、最小部分の幅（主面の長手方向に直交する方向の長さ）を３．０ｍｍ以上とすることによって４０Ａ以上の電流を流すことができる。   By forming the base 11, the first elastic portion 12, and the second elastic portion 13 using a band-shaped member, it becomes possible to flow a current of 40 A or more with one connection terminal 10. For example, the thickness (length in the direction perpendicular to the main surface) of the base 11, the first elastic portion 12, and the second elastic portion 13 is 0.2 mm, and the width of the minimum portion (in the direction orthogonal to the longitudinal direction of the main surface). By setting the (length) to 3.0 mm or more, a current of 40 A or more can flow.

ここで、接続端子１０は、１枚の平板に対し、エッチングまたはプレスによって成形処理することで作製される。具体的には、平板から接続端子１０の外縁形状に応じた平面形状を成形した後、延出部、弾性部における各湾曲形状を形成して作製する。なお、構成要素ごとにエッチングまたはプレスによって成形し、その後連結することによって一体的に作製されるものであってもよい。   Here, the connection terminal 10 is produced by forming a single flat plate by etching or pressing. Specifically, after forming a planar shape corresponding to the outer edge shape of the connection terminal 10 from a flat plate, each curved shape in the extended portion and the elastic portion is formed. In addition, it may be integrally manufactured by forming each component by etching or pressing and then connecting the components.

図６は、パワーモジュールの接続端子への荷重が非荷重の場合を示す図である。図６の断面図は、図４の断面を正面からみた図に対応している。ここで、図６に示すように、接続端子１０は、第２弾性部１３の先端部分が、接続端子ホルダ２０の上面から突出するように収容部２１に収容されている。このとき、第１弾性部１２は、接続端子ホルダ２０と基板３０との固定によって、所定の接触圧により基板３０側の電極Ｅと接触している。このため、接続端子１０の上方から接続対象の電極を近づけた際に、電極と接触部１３ａとを接触させることができる。   FIG. 6 is a diagram illustrating a case where the load on the connection terminal of the power module is not loaded. The cross-sectional view of FIG. 6 corresponds to the front view of the cross section of FIG. Here, as shown in FIG. 6, the connection terminal 10 is accommodated in the accommodation portion 21 such that the tip portion of the second elastic portion 13 protrudes from the upper surface of the connection terminal holder 20. At this time, the first elastic portion 12 is in contact with the electrode E on the substrate 30 side by a predetermined contact pressure by fixing the connection terminal holder 20 and the substrate 30. For this reason, when the electrode to be connected is approached from above the connection terminal 10, the electrode and the contact portion 13a can be brought into contact with each other.

図７は、図６の状態で接触部１３ａから荷重Ｆが加わった状態を示す断面図である。図７に示すように、接触部１３ａが基板の電極と接触して荷重Ｆ（図６参照）が加わると、弾性部１３が弾性変形する。ここで、破線Ｐ０は、接触部１３ａに荷重Ｆが加わっていない状態での接続端子１０の位置（図６参照）を示している。このとき、第２延出部１１ｃが収容部２１の段部と当接しているため、接触部１３ａにかかる荷重Ｆは、この荷重Ｆに応じて弾性変形する第２弾性部１３のみに加わることとになり、基部１１および第１弾性部１２が荷重Ｆによって弾性変形することはない。また、第１弾性部１２は、接触部１３ａに加わる荷重Ｆに関わらず、電極Ｅと所定の接触圧により接触している。この際、基板３０からの電気信号は、接触部１２ａから第１弾性部１２、基部１１（平板部１１ａ）、第２弾性部１３（接触部１３ａ）を経由して他方の基板の電極へ到達する。 FIG. 7 is a cross-sectional view showing a state in which a load F is applied from the contact portion 13a in the state of FIG. As shown in FIG. 7, when the contact portion 13a comes into contact with the electrode of the substrate and a load F (see FIG. 6) is applied, the elastic portion 13 is elastically deformed. Here, broken lines P 0 indicates the position of the connection terminal 10 in a state where the contact portion 13a is not applied load F (see Fig. 6). At this time, since the second extending portion 11c is in contact with the stepped portion of the housing portion 21, the load F applied to the contact portion 13a is applied only to the second elastic portion 13 that is elastically deformed according to the load F. Thus, the base 11 and the first elastic part 12 are not elastically deformed by the load F. The first elastic portion 12 is in contact with the electrode E with a predetermined contact pressure regardless of the load F applied to the contact portion 13a. At this time, the electrical signal from the substrate 30 reaches the electrode of the other substrate from the contact portion 12a via the first elastic portion 12, the base portion 11 (flat plate portion 11a), and the second elastic portion 13 (contact portion 13a). To do.

接続端子１０は、第２弾性部１３が伝達される荷重Ｆに応じて弾性変形することによって、導体間距離のばらつき、温度変化、基板の反り等による端子と接触対象物との間の距離の変動を吸収し、接触対象物との接触状態を維持することができる。また、第２弾性部１３の弾性変形によって、荷重Ｆによる基部１１や第１弾性部１２の弾性変形を防止することができるため、より安定した電極間の接触状態の維持を実現することができる。   The connection terminal 10 is elastically deformed according to the load F transmitted by the second elastic portion 13, so that the distance between the terminal and the contact object due to variations in the distance between conductors, temperature change, warpage of the substrate, etc. The fluctuation can be absorbed and the contact state with the contact object can be maintained. In addition, since the elastic deformation of the second elastic portion 13 can prevent the elastic deformation of the base 11 and the first elastic portion 12 due to the load F, more stable maintenance of the contact state between the electrodes can be realized. .

また、接続端子１０が、第２延出部１１ｃによって、空気よりも熱伝導率の高い収容部２１（小径部２１２）の内部壁面と接触しているため、通電によって接続端子１０の内部で発生した熱を、基部１１を介して接続端子ホルダ２０に伝達して外部に放出する。すなわち、基部１１は、第１弾性部１２および第２弾性部１３と比して、高い放熱特性を有する。   Further, since the connection terminal 10 is in contact with the inner wall surface of the accommodating portion 21 (small diameter portion 212) having a higher thermal conductivity than air by the second extending portion 11c, it is generated inside the connection terminal 10 by energization. The transmitted heat is transmitted to the connection terminal holder 20 through the base 11 and released to the outside. That is, the base 11 has higher heat dissipation characteristics than the first elastic portion 12 and the second elastic portion 13.

上述した実施の形態１によれば、接続端子ホルダに固定される基部に対して、電極等と接触し、その荷重に応じて弾性変形する第１および第２弾性部を別個設けることによって電気的導通を確保するとともに、それぞれに加わる荷重に対して弾性変形するようにし、第１および第２弾性部間に配設される基部によって通電により発生した熱を外部に放出するようにしたので、接触対象間で安定した導通を実現することができるとともに、良好なばね特性および放熱特性を有する接続端子を得ることができる。   According to the first embodiment described above, the base fixed to the connection terminal holder is electrically provided by separately providing the first and second elastic portions that come into contact with the electrodes and the like and elastically deform according to the load. The contact is ensured as well as elastically deforming with respect to the load applied to each, and the heat generated by energization is released to the outside by the base disposed between the first and second elastic portions. A stable continuity between objects can be realized, and a connection terminal having good spring characteristics and heat dissipation characteristics can be obtained.

また、接続端子１０において通電により発生した熱は、基部１１から接続端子ホルダ２０に伝達して外部に放熱させることができるため、発生した熱による電気抵抗の増大を抑制し、導電性の低下を抑制することができる。   In addition, since heat generated by energization in the connection terminal 10 can be transmitted from the base 11 to the connection terminal holder 20 to be radiated to the outside, an increase in electrical resistance due to the generated heat is suppressed, and conductivity is reduced. Can be suppressed.

また、上述した本実施の形態１によれば、基部１１が、収容部２１に圧入されて固定されるとともに、外部からの荷重に対しては第２弾性部１３が弾性変形し、基板３０からの荷重に対しては第１弾性部１２が弾性変形するため、例えば、外部からの荷重による、基板３０と第１弾性部１２との接触状態への影響が小さい。これにより、接触する接触対象間に対するそれぞれの接触状態を一段と確実なものとし、安定した接触状態を維持できるという効果を得ることができる。   Further, according to the first embodiment described above, the base portion 11 is press-fitted and fixed in the accommodating portion 21, and the second elastic portion 13 is elastically deformed against an external load, so Since the first elastic portion 12 is elastically deformed with respect to the load, for example, the influence of the external load on the contact state between the substrate 30 and the first elastic portion 12 is small. Thereby, each contact state with respect to the contact object which contacts can be made more reliable, and the effect that the stable contact state can be maintained can be acquired.

また、上述した本実施の形態１によれば、接続端子１０を接続端子ホルダ２０（収容部２１）に対して挿抜するのみで取り付けおよび取り外しができるため、接続端子の交換を容易に行うことが可能である。   Moreover, according to this Embodiment 1 mentioned above, since it can attach and detach only by inserting / extracting the connection terminal 10 with respect to the connection terminal holder 20 (accommodating part 21), replacement | exchange of a connection terminal can be performed easily. Is possible.

また、上述した本実施の形態１によれば、所定の位置に設けられた収容部２１に接続端子１０が取り付けられているため、接続端子ホルダ２０を基板３０に位置決めして固定するのみで複数の接続端子の基板上の位置決めを完了させることができ、位置決めにかかる労力を軽減することが可能である。   Further, according to the first embodiment described above, since the connection terminal 10 is attached to the accommodating portion 21 provided at a predetermined position, a plurality of connection terminals 20 can be simply positioned and fixed to the substrate 30. The positioning of the connection terminals on the substrate can be completed, and the labor for positioning can be reduced.

また、上述した本実施の形態１によれば、接続端子１０の板厚および板幅を調節することによって、接続端子１０のばね定数および電気抵抗値を容易に調整することができる。また、接続端子は、平板状の材料に対してプレス等の簡便な加工方法により形成することができるため、製造コストを抑制することができる。   Further, according to the first embodiment described above, the spring constant and electrical resistance value of the connection terminal 10 can be easily adjusted by adjusting the plate thickness and plate width of the connection terminal 10. Moreover, since the connection terminal can be formed on a flat plate material by a simple processing method such as pressing, the manufacturing cost can be suppressed.

なお、上述した実施の形態１では、第１延出部１１ｂおよび第２延出部１１ｃが、基部１１を通過する平面に対して同じ側に延びるものとして説明したが、この平面に対して異なる側にそれぞれ延びるものであってもよい。また、第１延出部１１ｂおよび第２延出部１１ｃが、平板部１１ａの主面に直交する方向に湾曲されるものとして説明したが、第１および第２延出部の外縁間を結ぶそれぞれの距離が上述した距離を満たせば、湾曲形状は、これに限定されることはなく、湾曲していない形状であってもよい。ここで、第１延出部１１ｂにおいては、挿入時の摩擦等による小径部２１２の損傷を抑制するため、湾曲形状が形成されていることが好ましい。   In the first embodiment described above, the first extending portion 11b and the second extending portion 11c are described as extending on the same side with respect to the plane passing through the base portion 11, but are different from this plane. Each may extend to the side. Moreover, although the 1st extension part 11b and the 2nd extension part 11c demonstrated as what curves in the direction orthogonal to the main surface of the flat plate part 11a, it connects between the outer edges of a 1st and 2nd extension part. As long as each distance satisfies the above-described distance, the curved shape is not limited to this, and may be a shape that is not curved. Here, in the 1st extension part 11b, in order to suppress the damage of the small diameter part 212 by the friction at the time of insertion, etc., it is preferable that the curved shape is formed.

図８は、本実施の形態１の変形例１−１にかかる接続端子１０ａを示す側面図である。なお、上述したパワーモジュールにかかる構成と同一の箇所には、同一の符号が付してある。上述した実施の形態１では、第１弾性部１２および第２弾性部１３が、板面に対して直交する方向に湾曲した形状において、複数回湾曲を繰り返した形状をなすものとして説明したが、その形状に限定されるものではない。図８に示す接続端子１０ａのように、上述した実施の形態１の第１弾性部１２および第２弾性部１３と比して、緩やかな弧状をなす第１弾性部１４および第２弾性部１５であってもよい。なお、第１弾性部１４および第２弾性部１５において、接続端子１０ａが延びる方向の先端部には、接触対象と接触する接触部１４ａおよび１５ａが設けられる。   FIG. 8 is a side view showing the connection terminal 10a according to the modified example 1-1 of the first embodiment. In addition, the same code | symbol is attached | subjected to the location same as the structure concerning the power module mentioned above. In Embodiment 1 described above, the first elastic portion 12 and the second elastic portion 13 have been described as having a shape in which the first elastic portion 12 and the second elastic portion 13 are curved in a direction orthogonal to the plate surface, and are repeatedly bent multiple times. The shape is not limited. As shown in the connection terminal 10a shown in FIG. 8, the first elastic portion 14 and the second elastic portion 15 that form a gentle arc as compared with the first elastic portion 12 and the second elastic portion 13 of the first embodiment described above. It may be. In the first elastic portion 14 and the second elastic portion 15, contact portions 14 a and 15 a that come into contact with the contact target are provided at the tip end portions in the direction in which the connection terminals 10 a extend.

図９は、本発明の実施の形態１の変形例１−２にかかる接続端子１０ｂを示す側面図である。第１弾性部１６および第２弾性部１７は、基部１１の板面が通過する平面上で、凹凸が逆の湾曲部分を繰り返したジグザグ状に基部１１の基端からそれぞれ延びている。第１弾性部１６および第２弾性部１７は、基部１１の幅方向に往復して、基部１１の幅方向に直交する方向と平行な方向に延びる形状をなす。なお、第１弾性部１６および第２弾性部１７において、接続端子１０ｂが延びる方向の先端部には、接触対象と接触する接触部１６ａおよび１７ａが設けられる。また、第１弾性部１６および第２弾性部１７は、基部１１の板面が通過する同一の平面上で延びていることが好ましい。   FIG. 9 is a side view showing the connection terminal 10b according to the modified example 1-2 of the first embodiment of the present invention. The first elastic portion 16 and the second elastic portion 17 extend from the base end of the base portion 11 in a zigzag shape in which curved portions having opposite concavities and convexities are repeated on a plane through which the plate surface of the base portion 11 passes. The first elastic portion 16 and the second elastic portion 17 have a shape that reciprocates in the width direction of the base portion 11 and extends in a direction parallel to the direction orthogonal to the width direction of the base portion 11. In the first elastic portion 16 and the second elastic portion 17, contact portions 16 a and 17 a that are in contact with the contact target are provided at the distal end portion in the direction in which the connection terminal 10 b extends. Moreover, it is preferable that the 1st elastic part 16 and the 2nd elastic part 17 are extended on the same plane through which the plate | board surface of the base 11 passes.

変形例１−２によれば、第１弾性部１６および第２弾性部１７が、基部１１の板面が通過する平面上でそれぞれ延びているため、上述した実施の形態と比して、接続端子の板厚方向の厚みを薄くすることができる。   According to the modified example 1-2, the first elastic portion 16 and the second elastic portion 17 extend on a plane through which the plate surface of the base portion 11 passes, and therefore, compared with the above-described embodiment. The thickness of the terminal in the plate thickness direction can be reduced.

図１０は、本実施の形態１の変形例１−３にかかるパワーモジュールの要部の構成を示す断面斜視図である。図１１は、本実施の形態１の変形例１−３にかかるパワーモジュールの要部の構成を示す断面斜視図である。上述した実施の形態１では、接続端子ホルダが、シリコンなどの樹脂、マシナブルセラミックなどの絶縁性材料を用いて形成されるものとして説明したが、その構成に限定されるものではない。図１０，１１に示す接続端子ホルダ２０ａは、貫通方向に沿って径が異なる段付き孔形状をなす収容部２１ａを有する。収容部２１ａは、接続端子ホルダ２０の上端面に開口を有する大径部２１３と、この大径部２１３よりも径が小さい小径部２１４と、からなる。小径部２１４は、大径部２１３側で拡径された段付き形状をなし、この拡径部分には、金属材料からなる充填部２１５が設けられる。充填部２１５は、銅等を用いて形成される円環状をなす。これにより、収容部２１ａは、小径部２１４の内部壁面の一部が金属材料からなる段付き形状をなす。   FIG. 10 is a cross-sectional perspective view showing the configuration of the main part of the power module according to Modification 1-3 of Embodiment 1. FIG. 11 is a cross-sectional perspective view showing the configuration of the main part of the power module according to Modification 1-3 of Embodiment 1. In Embodiment 1 described above, the connection terminal holder has been described as being formed using an insulating material such as a resin such as silicon or a machinable ceramic, but the configuration is not limited thereto. The connection terminal holder 20a shown in FIGS. 10 and 11 has an accommodating portion 21a having a stepped hole shape with different diameters along the penetrating direction. The accommodating portion 21a includes a large-diameter portion 213 having an opening at the upper end surface of the connection terminal holder 20, and a small-diameter portion 214 having a diameter smaller than that of the large-diameter portion 213. The small-diameter portion 214 has a stepped shape that is expanded on the large-diameter portion 213 side, and the expanded portion is provided with a filling portion 215 made of a metal material. The filling portion 215 has an annular shape formed using copper or the like. Thereby, the accommodating part 21a makes the stepped shape in which a part of internal wall surface of the small diameter part 214 consists of metal materials.

接続端子１０は、充填部２１５が設けられた収容部２１ａに収容された際、第１延出部１１ｂおよび第２延出部１１ｃが充填部２１５と接触する。これにより、上述した実施の形態と比して、接続端子１０（パワーモジュール）の放熱特性を向上することができる。   When the connection terminal 10 is accommodated in the accommodating portion 21 a provided with the filling portion 215, the first extending portion 11 b and the second extending portion 11 c come into contact with the filling portion 215. Thereby, compared with embodiment mentioned above, the thermal radiation characteristic of the connecting terminal 10 (power module) can be improved.

（実施の形態２）
図１２は、本実施の形態２にかかるパワーモジュール１ａの構成を示す斜視図である。図１２に示すパワーモジュール１ａは、上述した複数の接続端子１０、接続端子ホルダ２０および基板３０を備え、上述した実施の形態１において、接続端子１０および接続端子２０の収容部２１が基板３０に対して反転したものである。なお、上述したパワーモジュールにかかる構成と同一の箇所には、同一の符号が付してある。 (Embodiment 2)
FIG. 12 is a perspective view showing the configuration of the power module 1a according to the second embodiment. The power module 1a illustrated in FIG. 12 includes the plurality of connection terminals 10, the connection terminal holder 20, and the substrate 30 described above. In the first embodiment described above, the housing portion 21 of the connection terminal 10 and the connection terminal 20 is provided on the substrate 30. On the other hand, it is reversed. In addition, the same code | symbol is attached | subjected to the location same as the structure concerning the power module mentioned above.

図１３，１４は、図１２に示すパワーモジュール１ａの要部の構成を示す断面斜視図である。図１３，１４に示すように、接続端子ホルダ２０の大径部２１１が基板３０側に設けられ、小径部２１２が大径部２１１と異なる側で、外部に対して開口している。接続端子１０は、第２弾性部１３の接触部１３ａによって基板３０の電極Ｅと接触する。ここで、接続端子１０の第２延出部１１ｃが、大径部２１１および小径部２１２が形成する段部に当接している。このとき、接続端子ホルダ２０と基板３０とが固定されることにより、基板３０と大径部２１１とによって内部空間が形成され、第２延出部１１ｃおよび第２弾性部１３が収容された状態となる。これにより、接続端子１０の接続端子ホルダ２０からの抜止機能を有することとなる。   13 and 14 are cross-sectional perspective views showing the configuration of the main part of the power module 1a shown in FIG. As shown in FIGS. 13 and 14, the large-diameter portion 211 of the connection terminal holder 20 is provided on the substrate 30 side, and the small-diameter portion 212 is open to the outside on the side different from the large-diameter portion 211. The connection terminal 10 is in contact with the electrode E of the substrate 30 by the contact portion 13 a of the second elastic portion 13. Here, the 2nd extension part 11c of the connecting terminal 10 is contact | abutting to the step part which the large diameter part 211 and the small diameter part 212 form. At this time, when the connection terminal holder 20 and the substrate 30 are fixed, an internal space is formed by the substrate 30 and the large-diameter portion 211, and the second extension portion 11c and the second elastic portion 13 are accommodated. It becomes. Thereby, it has the function to prevent the connection terminal 10 from being removed from the connection terminal holder 20.

上述した実施の形態２によれば、上述した実施の形態１と同様に、接続端子ホルダに固定される基部に対して、電極等と接触し、その荷重に応じて弾性変形する第１および第２弾性部を別個設けることによって電気的導通を確保するとともに、それぞれに加わる荷重に対して弾性変形するようにし、第１および第２弾性部間に配設される基部によって通電により発生した熱を外部に放出するようにしたので、接触対象間で安定した導通を実現することができるとともに、良好なばね特性および放熱特性を有する接続端子を得ることができる。   According to the second embodiment described above, similar to the first embodiment described above, the first and the second are in contact with the electrodes and the like and elastically deformed according to the load with respect to the base fixed to the connection terminal holder. The two elastic portions are provided separately to ensure electrical continuity and to be elastically deformed with respect to the load applied to each, so that the heat generated by energization by the base disposed between the first and second elastic portions is generated. Since it is made to discharge | release outside, while being able to implement | achieve stable conduction | electrical_connection between contact objects, the connection terminal which has a favorable spring characteristic and heat dissipation characteristic can be obtained.

加えて、本実施の形態２では、基板３０と大径部２１１とによって形成された内部空間に第２延出部１１ｃおよび第２弾性部１３が収容された状態において、接続端子１０の接続端子ホルダ２０からの抜止機能を有するため、接続端子１０が接続端子ホルダ２０に固定された状態を、一段と確実に維持することができる。   In addition, in the second embodiment, the connection terminal of the connection terminal 10 in a state where the second extension portion 11c and the second elastic portion 13 are accommodated in the internal space formed by the substrate 30 and the large diameter portion 211. Since it has a function of preventing the holder 20 from being removed, the state where the connection terminal 10 is fixed to the connection terminal holder 20 can be more reliably maintained.

なお、上述した実施の形態２において、収容部に対し、変形例１−３で説明したような充填部２１５を設けたものであっても適用可能であり、これにより接続端子１０の放熱特性を一段と向上することができる。   Note that, in the above-described second embodiment, it is also possible to apply the housing portion provided with the filling portion 215 as described in the modification 1-3, thereby improving the heat dissipation characteristics of the connection terminal 10. It can be further improved.

また、上述した実施の形態１，２において、第１弾性部および第２弾性部の先端が互いに反対方向に延びるものとして説明したが、互いに同じ方向に延びるものであってもよい。第１弾性部および第２弾性部の先端が互いに同じ方向に延びるように形成することによって、プレス等による製造において形成が容易となる。   In the first and second embodiments described above, the tips of the first elastic portion and the second elastic portion extend in opposite directions, but may extend in the same direction. By forming the front ends of the first elastic portion and the second elastic portion so as to extend in the same direction, the formation is facilitated in manufacturing by pressing or the like.

また、上述した実施の形態１，２では、接続端子ホルダの収容部に対して接続端子を挿入することによって、接続端子を接続端子ホルダに固定するものとして説明したが、接続端子を装填した後、接続端子ホルダを成型するような、一体成型（インサート成型）によるものであってもよい。接続端子と接続端子ホルダとを一体成型することによって、上述した実施の形態１，２と比して一段と確実に接続端子を接続端子ホルダに固定することができる。   In the first and second embodiments described above, the connection terminal is fixed to the connection terminal holder by inserting the connection terminal into the housing portion of the connection terminal holder. However, after the connection terminal is loaded, Further, it may be by integral molding (insert molding) such as molding the connection terminal holder. By integrally molding the connection terminal and the connection terminal holder, the connection terminal can be more securely fixed to the connection terminal holder than in the first and second embodiments.

以上のように、本発明にかかる接続端子および接続端子ユニットは、接触対象間で安定した導通を実現することができるとともに、良好なばね特性および放熱特性を有するものとして有用である。   As described above, the connection terminal and the connection terminal unit according to the present invention are useful as those that can realize stable conduction between objects to be contacted and have good spring characteristics and heat dissipation characteristics.

１，１ａ パワーモジュール
１０，１０ａ，１０ｂ 接続端子
１１ 基部
１１ａ 平板部
１１ｂ 第１延出部
１１ｃ 第２延出部
１２，１４，１６ 第１弾性部
１２ａ，１３ａ，１４ａ，１５ａ，１６ａ，１７ａ 接触部
１３，１５，１７ 第２弾性部
２０ 接続端子ホルダ
２１，２１ａ 収容部
３０ 基板
２１１，２１３ 大径部
２１２，２１４ 小径部
２１５ 充填部 1, 1a Power module 10, 10a, 10b Connection terminal 11 Base 11a Flat plate part 11b First extension part 11c Second extension part 12, 14, 16 First elastic part 12a, 13a, 14a, 15a, 16a, 17a Contact Portions 13, 15 and 17 Second elastic portion 20 Connection terminal holder 21, 21a Housing portion 30 Substrate 211, 213 Large diameter portion 212, 214 Small diameter portion 215 Filling portion

Claims (12)

異なる基板間を接続する導電性の接続端子であって、
当該接続端子を保持する接続端子ホルダと接触する基部と、
前記基部の一端から帯状をなして延び、一方の基板と接触するとともに、外部から加わる荷重に対して弾性変形可能な第１弾性部と、
前記基部の他端から前記第１弾性部が延びる方向と反対方向に延び、他方の基板と接触するとともに、外部から加わる荷重に対して弾性変形可能な第２弾性部と、
を備えたことを特徴とする接続端子。 A conductive connection terminal for connecting different substrates,
A base that contacts the connection terminal holder that holds the connection terminal;
A first elastic portion extending in a band from one end of the base, contacting one of the substrates, and elastically deformable with respect to a load applied from the outside;
A second elastic portion that extends in a direction opposite to the direction in which the first elastic portion extends from the other end of the base, contacts the other substrate, and is elastically deformable with respect to a load applied from the outside;
A connection terminal characterized by comprising: 前記基部は、
略平板状をなす平板部と、
前記第１および第２弾性部が延びる方向と直交する方向に延出する２つの第１延出部と、
を備えたことを特徴とする請求項１に記載の接続端子。 The base is
A flat plate portion having a substantially flat plate shape;
Two first extending portions extending in a direction orthogonal to a direction in which the first and second elastic portions extend;
The connection terminal according to claim 1, further comprising: 前記第１延出部は、先端部分が前記平板部の主面に対して直交する方向にそれぞれ湾曲されていることを特徴とする請求項２に記載の接続端子。   The connection terminal according to claim 2, wherein the first extension part is curved in a direction perpendicular to a main surface of the flat plate part. 前記基部は、前記２つの第１延出部の各々に隣接して設けられ、前記第１延出部が延びる側面から延出する２つの第２延出部を有し、
前記２つの第２延出部の先端の間の距離は、前記２つの第１延出部の先端の間の距離より大きいことを特徴とする請求項２または３に記載の接続端子。 The base portion is provided adjacent to each of the two first extension portions, and has two second extension portions extending from a side surface from which the first extension portion extends,
4. The connection terminal according to claim 2, wherein a distance between tips of the two second extending portions is larger than a distance between tips of the two first extending portions. 5. 前記第１弾性部の幅は、前記第２弾性部の幅より大きいことを特徴とする請求項１〜４のいずれか一つに記載の接続端子。   The connection terminal according to claim 1, wherein a width of the first elastic portion is larger than a width of the second elastic portion. 前記第１および第２弾性部は、板面に対して直交する方向に湾曲した形状をなすことを特徴とする請求項１〜５のいずれか一つに記載の接続端子。   The connection terminal according to claim 1, wherein the first and second elastic portions have a shape that is curved in a direction orthogonal to the plate surface. 前記第１および第２弾性部は、前記平板部の主面を通過する平面上で凹凸が逆の湾曲部分を繰り返した形状をなすことを特徴とする請求項１〜５のいずれか一つに記載の接続端子。   The said 1st and 2nd elastic part makes the shape which made the shape which repeated the curved part with the uneven | corrugated reverse on the plane which passes along the main surface of the said flat plate part. Connection terminal as described. 請求項１に記載の接続端子と、
前記接続端子を収容する収容部を有する接続端子ホルダと、
を備えたことを特徴とする接続端子ユニット。 The connection terminal according to claim 1;
A connection terminal holder having an accommodating portion for accommodating the connection terminal;
A connection terminal unit comprising: 前記基部は、
略平板状をなす平板部と、
前記第１および第２弾性部が延びる方向と直交する方向に延出する２つの第１延出部と、
を有し、
前記第１延出部が、前記収容部の内部壁面に接触することを特徴とする請求項８に記載の接続端子ユニット。 The base is
A flat plate portion having a substantially flat plate shape;
Two first extending portions extending in a direction orthogonal to a direction in which the first and second elastic portions extend;
Have
The connection terminal unit according to claim 8, wherein the first extending portion is in contact with an inner wall surface of the housing portion. 前記基部は、前記２つの第１延出部の各々に隣接して設けられ、前記第１延出部が延びる側面から延出する２つの第２延出部を有し、
前記収容部は、一方の端面に開口を有する大径部、および該大径部よりも径が小さく、他方の端面に開口を有する小径部からなる段付き孔形状をなし、
前記２つの第２延出部の先端の間の距離は、前記２つの第１延出部の先端の間の距離より大きく、
前記第１延出部が、前記小径部の内部壁面に接触し、
前記第２延出部が、前記大径部と前記小径部とがなす段部に当接することを特徴とする請求項９に記載の接続端子ユニット。 The base portion is provided adjacent to each of the two first extension portions, and has two second extension portions extending from a side surface from which the first extension portion extends,
The accommodating portion has a stepped hole shape composed of a large diameter portion having an opening on one end surface, and a small diameter portion having a diameter smaller than the large diameter portion and having an opening on the other end surface,
The distance between the tips of the two second extending portions is greater than the distance between the tips of the two first extending portions,
The first extension part contacts the inner wall surface of the small diameter part;
The connection terminal unit according to claim 9, wherein the second extending portion is in contact with a step portion formed by the large diameter portion and the small diameter portion. 前記小径部は、内部壁面の一部が金属材料からなることを特徴とする請求項８〜１０のいずれか一つに記載の接続端子ユニット。   The connection terminal unit according to claim 8, wherein a part of the inner wall surface of the small diameter portion is made of a metal material. 前記接続端子は、前記接続端子ホルダと一体成型されることを特徴とする請求項８に記載の接続端子ユニット。   The connection terminal unit according to claim 8, wherein the connection terminal is integrally formed with the connection terminal holder.
JP2012024319A 2012-02-07 2012-02-07 Connection terminal and connection terminal unit Expired - Fee Related JP5856864B2 (en)

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