WO2013121652A1 - 端子接続構造 - Google Patents

端子接続構造 Download PDF

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Publication number
WO2013121652A1
WO2013121652A1 PCT/JP2012/081240 JP2012081240W WO2013121652A1 WO 2013121652 A1 WO2013121652 A1 WO 2013121652A1 JP 2012081240 W JP2012081240 W JP 2012081240W WO 2013121652 A1 WO2013121652 A1 WO 2013121652A1
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WIPO (PCT)
Prior art keywords
contact
contact portion
terminal
recess
sliding
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PCT/JP2012/081240
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English (en)
French (fr)
Inventor
将寿 中村
Original Assignee
矢崎総業株式会社
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Publication date
Application filed by 矢崎総業株式会社 filed Critical 矢崎総業株式会社
Priority to CN201280069931.6A priority Critical patent/CN104115338B/zh
Priority to EP12868529.4A priority patent/EP2816669A4/en
Publication of WO2013121652A1 publication Critical patent/WO2013121652A1/ja
Priority to US14/459,414 priority patent/US9252535B2/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/04—Pins or blades for co-operation with sockets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/10—Sockets for co-operation with pins or blades
    • H01R13/11—Resilient sockets
    • H01R13/113—Resilient sockets co-operating with pins or blades having a rectangular transverse section
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure
    • H01R13/187—Pins, blades or sockets having separate spring member for producing or increasing contact pressure with spring member in the socket
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/183—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
    • H01R4/184—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion
    • H01R4/185—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion combined with a U-shaped insulation-receiving portion

Definitions

  • the present invention relates to a terminal connection structure in which contact portions of a plurality of terminals are in sliding contact with each other.
  • a structure for connecting the terminals of the connector As a structure for connecting the terminals of the connector, a structure in which the first contact portion of the first terminal and the second contact portion of the second terminal are in contact with each other by sliding is proposed.
  • the first terminal and the second terminal are slid slightly.
  • the surface plating layer (for example, tin plating) of the two contact portions is scraped, and wear powder is generated.
  • the abrasion powder is interposed between the first contact portion and the second contact portion, the contact resistance increases.
  • the contact load between the first contact part and the second contact part is large (for example, 4.0 N)
  • the fine sliding distance between the first contact part and the second contact part can be kept short, The amount of generated abrasion powder is reduced.
  • the contact load between the first contact part and the second contact part becomes small (for example, 1.0 N or less) with the miniaturization of the connector in recent years, the fine sliding distance between the first contact part and the second contact part. And the amount of wear powder generated by fine sliding increases, so that the durability of the terminal decreases.
  • Patent Document 1 proposes a terminal connection structure that solves the above problems.
  • FIG. 6 shows this contact connection structure.
  • the contact connection structure of Patent Document 1 includes a movable terminal 50 and a fixed terminal 60.
  • the movable terminal 50 has an arcuate movable contact portion 51.
  • the fixed terminal 60 has a fixed contact portion 61 on which the movable contact portion 51 slides.
  • the sliding surface of the fixed contact portion 61 has a plurality of grooves 62.
  • the groove 62 is formed along the sliding direction (terminal moving direction) S and at an interval.
  • the contact portion 51 of the movable terminal 50 slides on the fixed contact portion 61 of the fixed terminal 60 when the terminal is connected or slightly slid.
  • the wear powder is moved by the movement of the movable contact portion 51, and a part of the wear powder enters the groove 62.
  • the quantity of the abrasion powder interposed between the movable contact part 51 and the fixed contact part 61 can be reduced, and the increase in contact resistance can be suppressed.
  • the abrasion powder generated on the movable contact portion 51 and the fixed contact portion 61 cannot enter the groove 62 unless it changes in the direction orthogonal to the sliding direction S. Therefore, only a part of the wear powder enters the groove 62, and the amount of wear powder interposed between the movable contact portion 51 and the fixed contact portion 61 cannot be reduced so much. As a result, an increase in contact resistance cannot be effectively suppressed.
  • an object of the present invention is to provide a terminal connection structure that can effectively suppress an increase in contact resistance due to wear powder.
  • One aspect of the present invention is a terminal connection structure, comprising: a first terminal including a first contact portion; and a second terminal including a second contact portion that slides on the first contact portion.
  • One contact portion and the second contact portion are slidably contacted with each other, and a sliding surface of the first contact portion is inclined with respect to a sliding direction of the first contact portion and the second contact portion.
  • a first projecting wall and a first recess provided alternately along the sliding direction, and the sliding surface of the second contact portion includes the first projecting wall and the first projecting wall.
  • the gist of the invention is to have second projecting walls and second recesses that extend in a direction intersecting with one recess and are alternately provided along the sliding direction.
  • the width and depth of the first recess and the second recess may be set to a width and depth equal to or greater than the maximum assumed particle size of the wear powder.
  • the inclination angle between the first protrusion wall and the first recess and the inclination angle between the second protrusion wall and the second recess may be set within a range of 30 to 60 degrees, respectively.
  • the first contact portion and the second contact portion slide with each other (including the slight slide) when the terminal is connected or at the time of the slight slide, and the first contact portion or the second contact portion is caused by the sliding.
  • wear powder such as metal plating
  • the wear powder moves following the sliding of the first contact portion and the second contact portion.
  • the contact points of the first contact part and the second contact part are distributed in a grid pattern.
  • the wear powder enters the first recess and the second recess regardless of the moving direction.
  • FIG. 1A and 1B show a male terminal and a female terminal according to an embodiment of the present invention.
  • FIG. 1A is a cross-sectional view before contact between both terminals
  • FIG. 1B is a cross-sectional view when contact between both terminals is completed.
  • 2A and 2B show a contact portion of a male terminal according to an embodiment of the present invention, wherein FIG. 2A is a plan view of the main part, FIG. 2B is an enlarged view of D1 in FIG. 2A, and FIG. FIG. FIG. FIG. 3 shows a contact portion of a female terminal according to an embodiment of the present invention, (a) is a plan view of the main part, (b) is an enlarged view of D2 of (a), and (c) is (b).
  • FIG. 1A is a cross-sectional view before contact between both terminals
  • FIG. 1B is a cross-sectional view when contact between both terminals is completed.
  • 2A and 2B show a contact portion of a male terminal
  • FIG. 4A and 4B show a protruding wall according to an embodiment of the present invention, in which FIG. 4A is an enlarged sectional view thereof, and FIGS. 4B and C are enlarged sectional views of modified examples of the protruding wall.
  • FIG. 5 shows the contact state of each contact portion of the male terminal and the female terminal according to one embodiment of the present invention, (a) is a diagram showing the location where each contact portion is in direct contact, and (b) is a cross-hatching. It is a figure explaining the state which each contact part moves relatively by microsliding.
  • FIG. 6 is a perspective view of a conventional terminal connection structure.
  • the connector device to which the terminal connection structure according to this embodiment is applied includes a first connector (not shown) and a second connector (not shown).
  • the first connector includes a first connector housing (not shown) and a male terminal 1 fixed in the first connector housing and formed as a first terminal (see FIG. 1).
  • the second connector has a second connector housing (not shown) and a female terminal 10 fixed in the second connector housing and formed as a second terminal (see FIG. 1).
  • the first connector housing and the second connector housing are configured to be fitted to each other. In a state where the first connector housing and the second connector housing are fitted, the male terminal 1 and the female terminal 10 are brought into contact with each other by an elastic deformation force.
  • the male terminal 1 is formed of a conductive member.
  • the surface of the male terminal 1 is tin (Sn) plated.
  • the male terminal 1 has a tab portion 2 formed as a male side contact portion.
  • the tab portion 2 has a sliding surface that slidably contacts the contact portion 13 (see FIG. 3) of the female terminal 10. Further, as shown in FIGS. 2A to 2C, the sliding surface of the tab portion 2 extends in a direction inclined with respect to the sliding direction S, and alternately along the sliding direction S. It has the 1st protrusion wall 2a and the 1st recessed part 2b which are provided.
  • the sliding direction S is a direction in which the male terminal 1 is inserted into the female terminal 10 or a direction in which the male terminal 1 is detached from the female terminal 10.
  • the inclination angle ⁇ of each extending direction of the first projecting wall 2a and the first recess 2b with respect to the sliding direction S is set within a range of 30 to 60 degrees.
  • the cross-sectional shape of the 1st protrusion wall 2a is a rectangle.
  • the width and depth of the first recess 2b are set to a width and depth that are equal to or larger than the maximum assumed particle diameter of the wear powder Q (see FIG. 5). Specifically, in the case of tin plating, since the particle size of the wear powder Q is about 0.1 to 10 ⁇ m, the width and depth of the first recess 2 b are set to 10 ⁇ m or more.
  • the female terminal 10 is formed by pressing a conductive member.
  • the female terminal 10 has a box frame body 11 whose front is open.
  • An elastic arm portion 12 is provided on the upper surface in the box frame 11.
  • the elastic arm portion 12 has a contact portion 13 formed as a female side contact portion.
  • the contact portion 13 is formed by bending the constituent member and protrudes downward.
  • the contact portion 13 has a sliding surface that slidably contacts the tab portion 2 of the male terminal 1. As shown in FIGS. 3A to 3C, the sliding surface of the contact portion 13 extends in a direction intersecting the first projecting wall 2a and the first recess 2b, and extends along the sliding direction S.
  • the second protrusion wall 13a and the second recess 13b are alternately provided.
  • the second protruding wall 13a and the second recessed portion 13b are opposite to the first protruding wall 2a and the first recessed portion 2b.
  • the inclination angle ⁇ of each extending direction of the second protruding wall 13a and the second recess 13b with respect to the sliding direction (terminal insertion direction and terminal detachment direction) S is set within a range of 30 to 60 degrees.
  • the cross-sectional shape of the 2nd protrusion wall 13a is a tetragon
  • the width and depth of the second recess 13b are set to a width and depth that are equal to or larger than the maximum assumed particle diameter of the wear powder Q. Specifically, in the case of tin plating, since the particle size of the wear powder Q is about 0.1 to 10 ⁇ m, the width and depth of the second recess 13b are set to 10 ⁇ m or more.
  • the lower surface portion 11 a of the box frame 11 has two contact piece portions 14. Each contact piece 14 is formed by bending its constituent members.
  • the distal end side of the tab portion 2 of the male terminal 1 is connected to the elastic arm portion 12 and the box frame body 11.
  • the lower surface part 11a or the contact piece part 14 is contacted.
  • the elastic arm portion 12 is bent and deformed, and insertion of the tab portion 2 of the male terminal 1 is allowed.
  • the male terminal 1 is inserted into the inner part of the female terminal 10 while the tab part 2 slides on the contact part 13 and the contact piece part 14 of the female terminal 10, respectively.
  • the connection operation between terminals will be completed.
  • the tab portion 2 of the male terminal 1 and the contact portion 13 of the female terminal 10 are in contact only at a contact point P where the first protruding wall 2a and the second protruding wall 13a overlap each other. That is, the first projecting wall 2a and the second projecting wall 13a contact each other at the contact points P distributed in a lattice shape.
  • 5A and 5B show the contact point P by cross hatching.
  • the male terminal 1 and the female terminal 10 connected to each other slide slightly.
  • the surface contact pattern between the tab portion 2 and the contact portion 13 is oblique with respect to the sliding direction S. It becomes a stripe that extends. In this case, only wear powder moving in a specific direction can enter the recess, and the wear powder cannot be removed effectively.
  • the terminal connection structure assuming a low contact load has been subjected to precious metal (Au, Ag) plating that is resistant to wear due to fine sliding and provides connection reliability.
  • the abrasion powder can be removed from each protruding wall (contact surface) for the above reason. Therefore, even if the contact connection structure is tin-plated, sufficient wear resistance against fine sliding can be obtained.
  • the width and depth of the first recess 2b and the second recess 13b are set to a width and depth equal to or greater than the maximum assumed particle diameter of the wear powder Q. Therefore, the wear powder Q can surely enter the first recess 2b and the second recess 13b.
  • the inclination angle ⁇ of the first projecting wall 2a and the first recess 2b and the inclination angle ⁇ of the second projecting wall 13a and the second recess 13b are set in the range of 30 to 60 degrees, respectively. Therefore, the wear powder Q can enter the first concave portion 2b and the second concave portion 13b with a short moving distance in any movement direction, and the wear powder Q can be effectively removed.
  • the inclination angle ⁇ on the male terminal 1 side and the inclination angle ⁇ on the female terminal 10 side may be the same or different.
  • the cross-sectional shapes of the first protruding wall 2a and the second protruding wall 13a are not limited to the quadrangle shown in FIG. That is, the cross-sectional shape may be a trapezoid shown in FIG. 4B or a semicircular shape shown in FIG. Furthermore, as long as it is a shape that can smoothly enter the first recess 2b and the second recess 13b by rolling of the wear powder Q, other shapes may be used.
  • the protruding wall and the concave portion of the male terminal 1 and the female terminal 10 may be formed on all sliding surfaces of both terminals. That is, the position where the protruding wall and the concave portion are formed is not limited to each sliding surface between the tab portion 2 of the male terminal 1 and the contact portion 13 of the female terminal 10, for example, the tab portion 2 of the male terminal 1 and the female portion. Each sliding surface between the contact piece portions 14 of the terminal 10 may be included. However, the protruding wall and the concave portion are alternately provided on any sliding surface.

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  • Coupling Device And Connection With Printed Circuit (AREA)

Abstract

　端子接続構造は、タブ部（２）を有するオス端子と、接点部（１３）を有するメス端子とを備える。タブ部（２）と接点部（１３）は互いに摺動する。タブ部（２）の摺動面は、タブ部（２）と接点部（１３）の摺動方向に対して傾斜した方向に沿って延伸し、且つ、前記摺動方向に沿って交互に設けられる突壁（２ａ）と凹部（２ｂ）とを有する。接点部（１３）の摺動面は、突壁（２ａ）及び凹部（２ｂ）とは交差する方向に沿って延伸し、且つ、前記摺動方向に沿って交互に設けられる突壁（１３ａ）と凹部（１３ｂ）とを有する。

Description

端子接続構造
　本発明は、複数の端子の各接点部が互いに摺動して接触する端子接続構造に関する。
　コネクタの端子間を接続する構造として、第１端子の第１接点部と第２端子の第２接点部が互いに摺動して接触するものが従来より提案されている。この構造を有するコネクタが、振動、熱衝撃、温湿度サイクル等の環境下で使用されると、第１端子と第２端子間が微摺動し、この微摺動によって第１接点部と第２接点部の表面メッキ層（例えば錫メッキ）が削れ、摩耗粉が発生する。摩耗粉が第１接点部と第２接点部の間に介在すると、接触抵抗が増加する。
　ここで、第１接点部と第２接点部間の接触荷重が大きい（例えば４．０Ｎ）と、第１接点部と第２接点部間の微摺動距離も短く抑えられ、微摺動によって発生する摩耗粉量が少なく抑えられる。
　しかし、近年のコネクタの小型化に伴い、第１接点部と第２接点部間の接触荷重が小さくなると（例えば１．０Ｎ以下）、第１接点部と第２接点部間の微摺動距離が大きくなり、微摺動によって発生する摩耗粉量も多くなるため、端子の耐久性が低下する。
　特開２０００－１８８０２８号公報（特許文献１）は、上記の問題を解決する端子接続構造を提案している。図６は、この接点接続構造を示す。特許文献１の接点接続構造は、可動端子５０と固定端子６０とを有する。可動端子５０は、円弧状の可動接点部５１を有する。固定端子６０は、可動接点部５１が摺動する固定接点部６１を有する。固定接点部６１の摺動面は、複数の溝６２を有する。溝６２には、摺動方向（端子移動方向）Ｓに沿って延伸し、且つ、間隔を置いて形成されている。
　上記構成では、端子の接続時や微摺動時に、可動端子５０の接点部５１が固定端子６０の固定接点部６１上を摺動する。この過程において摩耗粉が発生すると、摩耗粉が可動接点部５１の移動によって移動し、その一部が溝６２内に入り込む。これにより、可動接点部５１と固定接点部６１の間に介在する摩耗粉の量を低減でき、接触抵抗の増加を抑制できる。
特開２０００－１８８０２８号公報
　しかしながら、上記の端子接続構造では、可動接点部５１や固定接点部６１上に発生した摩耗粉が、その摺動方向Ｓの直交方向に変移しなければ溝６２に入り込むことができない。そのため、摩耗粉のごく一部しか溝６２内に入り込まず、可動接点部５１と固定接点部６１の間に介在する摩耗粉の量をあまり低減することができない。その結果、接触抵抗の増加を有効に抑制することができない。
　そこで、本発明は、前記した課題を解決すべくなされたものであり、摩耗粉に起因する接触抵抗の増加を有効に抑制することができる端子接続構造を提供することを目的とする。
　本発明の一態様は、端子接続構造であって、第１接点部を含む第１端子と、前記第１接点部上を摺動する第２接点部を含む第２端子とを備え、前記第１接点部と前記第２接点部とが互いに摺動して接触され、前記第１接点部の摺動面は、前記第１接点部と前記第２接点部の摺動方向に対して傾斜した方向に延伸し、且つ、前記摺動方向に沿って交互に設けられる第１突壁と第１凹部とを有し、前記第２接点部の摺動面は、前記第１突壁及び前記第１凹部と交差する方向に延伸し、且つ、前記摺動方向に沿って交互に設けられる第２突壁と第２凹部とを有することを要旨とする。
　前記第１凹部と前記第２凹部の幅及び深さは、摩耗粉の最大想定粒径以上の幅及び深さに設定されていてもよい。
　前記第１突壁と前記第１凹部の傾斜角度、及び、前記第２突壁と前記第２凹部の傾斜角度は、それぞれ３０度～６０度の範囲内に設定されていてもよい。
　本発明によれば、端子接続時や微摺動時にあって、第１接点部と第２接点部が互いに摺動（微摺動を含む）し、その摺動によって第１接点部や第２接点部上に金属メッキなどの摩耗粉が発生すると、第１接点部と第２接点部の摺動に追従して摩耗粉が移動する。ここで、第１接点部と第２接点部の接触ポイントは格子状に分布している。これらの接触ポイント上に位置する摩耗粉は、第１接点部や第２接点部に伴って移動する際にその移動方向に関わらず第１凹部と第２凹部に入り込むことになる。これにより、第１接点部と第２接点部の間に介在する摩耗粉の量を十分に低減でき、摩耗粉に起因する接触抵抗の増加を有効に抑制することができる。
図1は本発明の一実施形態に係るオス端子とメス端子を示し、（ａ）は両端子の接触前の断面図、（ｂ）は両端子の接触完了時の断面図である。 図２は本発明の一実施形態に係るオス端子の接点部を示し、（ａ）はその要部の平面図、（ｂ）は（ａ）のＤ１の拡大図、（ｃ）は（ｂ）のＡ－Ａ線断面図である。 図３は本発明の一実施形態に係るメス端子の接点部を示し、（ａ）はその要部の平面図、（ｂ）は（ａ）のＤ２の拡大図、（ｃ）は（ｂ）のＢ－Ｂ線断面図である。 図４は本発明の一実施形態に係る突壁を示し、（ａ）はその拡大断面図、（ｂ）、（ｃ）はそれぞれ突壁の変形例の拡大断面図である。 図５は本発明の一実施形態に係るオス端子とメス端子の各接点部の接触状態を示し、（ａ）は各接点部が直接に接触する箇所をクロスハッチングで示す図、（ｂ）は微摺動によって各接点部が相対的に移動する状態を説明する図である。 図６は、従来の端子接続構造の斜視図である。
　以下、本発明の一実施形態を図面に基づいて説明する。
　本実施形態に係る端子接続構造を適用したコネクタ装置は、第１コネクタ（図示せず）と第２コネクタ（図示せず）を備える。第１コネクタは、第１コネクタハウジング（図示せず）と、この第１コネクタハウジング内に固定され、第１端子として形成されたオス端子１を有する（図１参照）。第２コネクタは、第２コネクタハウジング（図示せず）と、この第２コネクタハウジング内に固定され、第２端子として形成されたメス端子１０を有する（図１参照）。第１コネクタハウジングと第２コネクタハウジングは、互いに嵌合可能に構成されている。第１コネクタハウジングと第２コネクタハウジングが嵌合した状態では、弾性変形力によってオス端子１とメス端子１０が接触される。
　図１（ａ）、（ｂ）に示すように、オス端子１は、導電性部材によって形成される。オス端子１の表面には、錫（Ｓｎ）メッキが施されている。オス端子１は、オス側接点部として形成されたタブ部２を有する。タブ部２は、メス端子１０の接点部１３（図３参照）に摺動可能に接触する摺動面を有する。さらに、図２（ａ）～（ｃ）に示すように、タブ部２の摺動面は、摺動方向Ｓに対して傾斜した方向に延伸し、且つ、摺動方向Ｓに沿って交互に設けられる第１突壁２ａと第１凹部２ｂを有する。なお、摺動方向Ｓは、オス端子１をメス端子１０に挿入する方向又はオス端子１をメス端子１０から離脱させる方向である。第１突壁２ａと第１凹部２ｂの各延伸方向の、摺動方向Ｓに対する傾斜角度αは、３０度～６０度の範囲内に設定される。図４（ａ）に示すように、第１突壁２ａの断面形状は、四角形である。第１凹部２ｂの幅及び深さは、摩耗粉Ｑ（図５参照）の最大想定粒径以上の幅及び深さに設定されている。詳細には、錫メッキの場合には、摩耗粉Ｑの粒径が０．１～１０μｍ程度であるため、第１凹部２ｂの幅及び深さは１０μｍ以上に設定されている。
　メス端子１０は、導電性部材をプレス加工することにより形成されている。メス端子１０は、前方が開口した箱枠体１１を有する。箱枠体１１内の上面には、弾性アーム部１２が設けられている。弾性アーム部１２は、メス側接点部として形成された接点部１３を有する。接点部１３は、その構成部材の折り曲げによって形成され、下方に向かって突出している。接点部１３は、オス端子１のタブ部２に摺動可能に接触する摺動面を有する。図３（ａ）～（ｃ）に示すように、接点部１３の摺動面は、第１突壁２ａ及び前記第１凹部２ｂと交差する方向に延伸し、且つ、摺動方向Ｓに沿って交互に設けられる第２突壁１３ａと第２凹部１３ｂを有する。即ち、接点部１３の摺動面がタブ部２の摺動面に正対したとき、第２突壁１３ａと第２凹部１３ｂは、第１突壁２ａと前記第１凹部２ｂと逆向きに傾斜している。第２突壁１３ａと第２凹部１３ｂの各延伸方向の、摺動方向（端子挿入方向及び端子離脱方向）Ｓに対する傾斜角度βは、３０度～６０度の範囲内に設定される。図４（ａ）に示すように、第２突壁１３ａの断面形状は、四角形である。第２凹部１３ｂの幅及び深さは、摩耗粉Ｑの最大想定粒径以上の幅及び深さに設定されている。詳細には、錫メッキの場合には、摩耗粉Ｑの粒径が０．１～１０μｍ程度であるため、第２凹部１３ｂの幅及び深さは１０μｍ以上に設定されている。
　箱枠体１１の下面部１１ａは、２つの接触片部１４を有する。各接触片部１４は、その構成部材の折り曲げによって形成される。
　図１（ａ）の状態から、オス端子１のタブ部２をメス端子１０の箱枠体１１内に挿入すると、オス端子１のタブ部２の先端側が、弾性アーム部１２と箱枠体１１の下面部１１ａ又は接触片部１４に当接する。この状態から、オス端子１を更に挿入させるための力を加えると、弾性アーム部１２が撓み変形し、オス端子１のタブ部２の挿入が許容される。オス端子１は、そのタブ部２がメス端子１０の接点部１３と接触片部１４にそれぞれ摺動しながら、メス端子１０内の奥に挿入される。そして、図１（ｂ）に示すように、オス端子１を接触完了位置まで挿入すると、端子間の接続作業が完了する。オス端子１のタブ部２とメス端子１０の接点部１３は、第１突壁２ａと第２突壁１３ａ同士が重なり合う接触ポイントＰでのみ接触する。即ち、第１突壁２ａと第２突壁１３ａは、格子状に分布した接触ポイントＰで互いに接触する。図５（ａ）、（ｂ）は、接触ポイントＰをクロスハッチングで示している。
　振動、熱衝撃、温湿度サイクル等の環境下では、互いに接続されたオス端子１とメス端子１０は相対的に微摺動する。
　タブ部２と接点部１３の相対的な摺動によってタブ部２や接点部１３上に錫メッキなどの摩耗粉Ｑが発生すると、タブ部２と接点部１３の摺動に追従して摩耗粉Ｑが移動する。ここで、タブ部２と接点部１３の接触ポイントＰは格子状に分布している。これらの接触ポイントＰ上に位置する摩耗粉Ｑは、タブ部２や接点部１３に伴って移動する際にその移動方向に関わらず第１凹部２ｂと第２凹部１３ｂに入り込むことになる。これにより、タブ部２と接点部１３の間に介在する摩耗粉Ｑの量を十分に低減でき、摩耗粉Ｑに起因する接触抵抗の増加を有効に抑制することができる。
　ここで、タブ部２と接点部１３のいずれか一方側のみに突壁と凹部を設けた場合には、タブ部２と接点部１３間の面接触のパターンが摺動方向Ｓに対して斜めに延伸するストライプになる。この場合、特定方向に移動する摩耗粉しか凹部に入り込むことができず、有効に摩耗粉を除去できない。
　特に、低接触荷重を想定した端子接続構造には、微摺動による摩耗に強く、接続信頼性が得られる貴金属（Ａｕ、Ａｇ）メッキを施していた。本実施形態では、上記理由によって摩耗粉を各突壁（接触面）上から除去できる。従って、接点接続構造に錫メッキを施しても、微摺動に対する十分な耐摩耗性が得られる。
　第１凹部２ｂと第２凹部１３ｂの幅及び深さは、摩耗粉Ｑの最大想定粒径以上の幅及び深さに設定されている。従って、摩耗粉Ｑを確実に第１凹部２ｂや第２凹部１３ｂに入り込ませることができる。
　第１突壁２ａと第１凹部２ｂの傾斜角度α、及び、第２突壁１３ａと第２凹部１３ｂの傾斜角度βは、それぞれ３０度～６０度の範囲内に設定されている。従って、摩耗粉Ｑは、あらゆる移動方向に対して短い移動距離で第１凹部２ｂや第２凹部１３ｂに入り込むことができ、有効に摩耗粉Ｑの除去ができる。
　オス端子１側の傾斜角度αとメス端子１０側の傾斜角度βは、同じであってもよく、異なっていてもよい。
　第１突壁２ａ及び第２突壁１３ａの断面形状は、図４（ａ）に示した四角形に限定されない。即ち、これらの断面形状は、図４（ｂ）に示す台形でもよく、図４（ｃ）に示す半円形でもよい。さらに、摩耗粉Ｑの転がりによって第１凹部２ｂや第２凹部１３ｂにスムーズに入り込むことができる形状であれば、これら以外の形状でもよい。
　オス端子１及びメス端子１０の突壁と凹部は、両端子のあらゆる摺動面に形成してもよい。即ち、突壁と凹部が形成される位置は、オス端子１のタブ部２とメス端子１０の接点部１３間の各摺動面だけに限られず、例えば、オス端子１のタブ部２とメス端子１０の接触片部１４間の各摺動面を含んでもよい。ただし、何れの摺動面においても、突壁と凹部は交互に設けられる。

Claims (3)

  1. 端子接続構造であって、
    　第１接点部を含む第１端子と、
    　前記第１接点部上を摺動する第２接点部を含む第２端子とを備え、
    　前記第１接点部の摺動面は、前記第１接点部と前記第２接点部の摺動方向に対して傾斜した方向に延伸し、且つ、前記摺動方向に沿って交互に設けられる第１突壁と第１凹部とを有し、、
    　前記第２接点部の摺動面は、前記第１突壁及び前記第１凹部と交差する方向に延伸し、且つ、前記摺動方向に沿って交互に設けられる第２突壁と第２凹部とを有することを特徴とする端子接続構造。
  2. 請求項１記載の端子接続構造であって、
    　前記第１凹部と前記第２凹部の幅及び深さは、摩耗粉の最大想定粒径以上の幅及び深さに設定されていることを特徴とする端子接続構造。
  3. 請求項１又は請求項２記載の端子接続構造であって、
    　前記摺動方向に対する前記第１突壁と前記第１凹部の傾斜角度、及び、前記摺動方向に対する前記第２突壁と前記第２凹部の傾斜角度は、それぞれ３０度～６０度の範囲内に設定されていることを特徴とする端子接続構造。
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