JP2013016654A - Flexible printed wiring board - Google Patents

Flexible printed wiring board Download PDF

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Publication number
JP2013016654A
JP2013016654A JP2011148582A JP2011148582A JP2013016654A JP 2013016654 A JP2013016654 A JP 2013016654A JP 2011148582 A JP2011148582 A JP 2011148582A JP 2011148582 A JP2011148582 A JP 2011148582A JP 2013016654 A JP2013016654 A JP 2013016654A
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Prior art keywords
terminal
edge
flexible printed
wiring
circuit board
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JP2011148582A
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JP5834549B2 (en
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Yuji Kawamura
裕史 河村
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Sumitomo Electric Industries Ltd
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Sumitomo Electric Industries Ltd
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/36—Assembling printed circuits with other printed circuits
    • H05K3/361—Assembling flexible printed circuits with other printed circuits
    • H05K3/363—Assembling flexible printed circuits with other printed circuits by soldering
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
    • H05K3/403—Edge contacts; Windows or holes in the substrate having plural connections on the walls thereof
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • H05K1/147—Structural association of two or more printed circuits at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H05K1/189—Printed circuits structurally associated with non-printed electric components characterised by the use of a flexible or folded printed circuit

Abstract

PROBLEM TO BE SOLVED: To provide a flexible printed wiring board in which the signal quality can be maintained by preventing open circuit while saving the space.SOLUTION: The flexible printed wiring board includes wiring terminals 30 formed to extend in the direction of axis Ax from an edge E1, and first and second joint terminals 20A, 20B provided on both sides in a direction perpendicular to the axis Ax of the wiring terminal 30 to extend in the direction of axis Ax from an edge E1 and can be joined to an external substrate. The end 30e of the wiring terminal 30 is located closer to the edge E1 side than a reference line LO extending along the edge E1, and the ends 20Ae, 20Be of the first and second joint terminals 20A, 20B are located closer to the edge E2 side than the reference line LO.

Description

本発明は、フレキシブルプリント基板に関する。   The present invention relates to a flexible printed circuit board.

特許文献１の光トランシーバは、上ハウジング、下ハウジング、電子回路を搭載する回路基板、光受信サブアセンブリ、及び光送信サブアセンブリを備える。上ハウジング及び下ハウジングは、電子回路を収容する第１の空間と光サブアセンブリを収容する第２の空間とを画成する。上ハウジング及び下ハウジングは、第１の空間と第２の空間とを個別独立にＥＭＩシールドする。   The optical transceiver of Patent Document 1 includes an upper housing, a lower housing, a circuit board on which an electronic circuit is mounted, an optical reception subassembly, and an optical transmission subassembly. The upper housing and the lower housing define a first space that houses the electronic circuit and a second space that houses the optical subassembly. The upper housing and the lower housing individually EMI shield the first space and the second space independently.

特開２００９−１９９０８３号公報JP 2009-199083 A 特開２００７−８８２３３号公報JP 2007-88233 A

ところで、特許文献１の光トランシーバは、可撓性を有するフレキシブルプリント基板を備える。フレキシブルプリント基板は、電気配線に接続させるための配線端子を備える。フレキシブルプリント基板において、配線端子に曲げが生じた場合、断線が生じ信号品質が劣化する等の問題が生じる可能性がある。   By the way, the optical transceiver of patent document 1 is provided with the flexible printed circuit board which has flexibility. The flexible printed board includes a wiring terminal for connecting to an electrical wiring. In the flexible printed circuit board, when the wiring terminal is bent, there is a possibility that problems such as disconnection occur and signal quality deteriorates.

本発明の目的は、上記のような問題に鑑みてなされたものであり、省スペースで断線を防止して信号品質を維持させることが可能なフレキシブルプリント基板を提供することである。   An object of the present invention is to provide a flexible printed board capable of maintaining signal quality by preventing disconnection in a space-saving manner in view of the above problems.

本発明の一側面に係るフレキシブルプリント基板は、可撓性を有する板状部を備えており前記板状部に電気配線が設けられているフレキシブルプリント基板であって、前記板状部の一の端部に設けられており前記電気配線に接続される配線端子と、前記端部に設けられており外部基板に接合される第１及び第２の接合端子とを備え、前記第１の接合端子、前記配線端子及び前記第２の接合端子は、前記端部の縁に沿って順に配置され、前記第１の接合端子、前記配線端子及び前記第２の接合端子は、前記縁から前記縁に交差する方向に延びており、前記第１の接合端子及び前記第２の接合端子は、前記端部を通り前記縁に沿って延びる基準線を越えて、前記縁から延びており、前記配線端子は、前記基準線を越えることなく前記縁と前記基準線との間の領域内において前記縁から延びている。   A flexible printed circuit board according to one aspect of the present invention is a flexible printed circuit board that includes a flexible plate-like portion, and electrical wiring is provided on the plate-like portion, and is one of the plate-like portions. A wiring terminal provided at an end portion and connected to the electric wiring; and first and second joining terminals provided at the end portion and joined to an external substrate, the first joining terminal. The wiring terminal and the second joining terminal are sequentially arranged along the edge of the end portion, and the first joining terminal, the wiring terminal, and the second joining terminal are arranged from the edge to the edge. The first junction terminal and the second junction terminal extend from the edge beyond a reference line extending through the edge and along the edge, and the wiring terminal extends in the intersecting direction. The edge and the reference without crossing the reference line Extending from said edge in a region between.

本発明に係るフレキシブルプリント基板によれば、縁から基準線を越えて延在する第１の接合端子及び第２の接合端子と、縁から基準線を越えることなく延在する配線端子とを備える。第１及び第２の接合端子は、縁から基準線を越えた位置まで延在する。そして、第１及び第２の接合端子の基準線を越えた位置まで延在した部分は、外部基板と接合される。このため、基準線を越えずに延在する配線端子には、曲げが生じない。従って、配線端子の銅箔が剥がれたり断線したりする事態を回避することが可能となり、信号品質を維持することができる。また、本発明ではリードデバイスのような追加部品は不要であるため、設計自由度の確保が可能となり省スペースを実現できる。なお、第１及び第２の接合端子は、配線端子の機能も兼ねている。また、第１及び第２の接合端子は、スルーホールを介して半田接合される。そして、第１及び第２の接合端子は、半田接合面の反対側の面に配線を備えている。このように配線を備えることにより、断線を回避している。   According to the flexible printed circuit board of the present invention, the first and second joining terminals extending from the edge beyond the reference line, and the wiring terminal extending from the edge without exceeding the reference line are provided. . The first and second junction terminals extend from the edge to a position beyond the reference line. And the part extended to the position beyond the reference line of the 1st and 2nd joining terminal is joined with an external substrate. For this reason, the wiring terminal extending without exceeding the reference line is not bent. Therefore, it is possible to avoid the situation where the copper foil of the wiring terminal is peeled off or disconnected, and the signal quality can be maintained. Further, in the present invention, additional parts such as a lead device are unnecessary, so that a degree of design freedom can be secured and space saving can be realized. Note that the first and second joining terminals also function as wiring terminals. The first and second joining terminals are soldered via through holes. And the 1st and 2nd junction terminal is equipped with the wiring in the surface on the opposite side to a solder joint surface. By providing the wiring in this way, disconnection is avoided.

また、本発明に係るフレキシブルプリント基板では、前記板状部の上に設けられており前記電気配線を覆う配線保護部を更に備え、前記配線保護部は、前記端部において前記基準線まで延在する。本発明によれば、配線保護部の一端は、第１及び第２の接合端子の縁の反対側端部よりも、縁側にある。このため、配線保護部の縁側から露出した配線に曲げが生じないようにすることが可能となる。従って、断線の発生を防止することが可能となり、信号品質を維持することができる。   The flexible printed circuit board according to the present invention further includes a wiring protection part provided on the plate-like part and covering the electrical wiring, and the wiring protection part extends to the reference line at the end. To do. According to the present invention, one end of the wiring protection part is on the edge side with respect to the opposite ends of the edges of the first and second joining terminals. For this reason, it is possible to prevent the wiring exposed from the edge side of the wiring protection portion from being bent. Therefore, occurrence of disconnection can be prevented, and signal quality can be maintained.

また、本発明に係るフレキシブルプリント基板では、前記配線端子が前記板状部に接している面の面積は、前記第１の接合端子が前記板状部に接している面の面積２０％以上８０％以下の範囲内、及び、前記第２の接合端子が前記板状部に接している面の面積の２０％以上８０％以下の範囲内にある。本発明によれば、フレキシブルプリント基板をより強固に外部基板に接合させることができる。そして、断線を回避することができる。   In the flexible printed circuit board according to the present invention, the area of the surface where the wiring terminal is in contact with the plate-like portion is 20% or more of the area of the surface where the first joining terminal is in contact with the plate-like portion. % And within the range of 20% or more and 80% or less of the area of the surface where the second junction terminal is in contact with the plate-like portion. According to the present invention, the flexible printed board can be more firmly bonded to the external board. And disconnection can be avoided.

また、本発明に係るフレキシブルプリント基板では、前記第１の接合端子と、前記板状部における前記第１の接合端子に接する領域とに、前記縁から前記基準線に向けて窪みが形成され、前記第２の接合端子と、前記板状部における前記第２の接合端子に接する領域とに、前記縁から前記基準線に向けて窪みが形成されている。本発明によれば、接合端子の半田接合時において、窪みに半田を盛ることが可能となる。このため、フレキシブルプリント基板をより一層強固に外部基板に接合させることができる。そして、断線を回避することができる。   Further, in the flexible printed circuit board according to the present invention, a depression is formed from the edge toward the reference line in the first joint terminal and a region in contact with the first joint terminal in the plate-like portion, A recess is formed from the edge toward the reference line in the second joint terminal and a region of the plate-like portion that is in contact with the second joint terminal. According to the present invention, it is possible to deposit solder in the depression when soldering the joining terminals. For this reason, a flexible printed circuit board can be joined to an external substrate still more firmly. And disconnection can be avoided.

また、本発明に係るフレキシブルプリント基板では、補強用部材を更に備え、前記端部は、第１領域及び第２領域からなり、前記第１領域は、前記第２領域に接続しており、前記第１領域及び前記第２領域は、前記基準線と交差する方向に配置され、前記第１の接合端子、前記配線端子及び前記第２の接合端子は、前記第１領域に設けられ、前記補強用部材は、前記第２領域に設けられている。本発明によれば、補強用部材により、曲げが生じうる部分を補強することができる。従って、配線端子を保護し、銅箔の剥がれ落ちや断線を回避することができる。   The flexible printed circuit board according to the present invention further includes a reinforcing member, and the end portion includes a first region and a second region, and the first region is connected to the second region, The first region and the second region are arranged in a direction crossing the reference line, and the first junction terminal, the wiring terminal, and the second junction terminal are provided in the first region, and the reinforcement The member for use is provided in the second region. According to the present invention, a portion where bending can occur can be reinforced by the reinforcing member. Therefore, it is possible to protect the wiring terminals and avoid peeling off or disconnection of the copper foil.

本発明によれば、省スペースで断線を防止して信号品質を維持させることが可能なフレキシブルプリント基板を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the flexible printed circuit board which can prevent a disconnection in space-saving and can maintain signal quality can be provided.

本実施形態に係るフレキシブルプリント基板を搭載した光トランシーバを示す図である。It is a figure which shows the optical transceiver carrying the flexible printed circuit board concerning this embodiment. 本実施形態に係るフレキシブルプリント基板を示す図である。It is a figure which shows the flexible printed circuit board which concerns on this embodiment. 本実施形態に係るフレキシブルプリントの構成を説明するための図である。It is a figure for demonstrating the structure of the flexible print which concerns on this embodiment. 従来のフレキシブルプリント基板を示す図である。It is a figure which shows the conventional flexible printed circuit board.

以下、添付図面を参照して、本発明を実施するための形態を詳細に説明する。なお、同一要素には同一符号を付し、重複する説明を省略する。光トランシーバ１は、光通信装置に含まれる。光トランシーバ１は、光通信装置に対して挿抜可能である。光トランシーバ１は、図１に示すように、外部基板２、発光ユニット３、受光ユニット４及びフレキシブルプリント基板１０を備える。外部基板２、発光ユニット３、受光ユニット４及びフレキシブルプリント基板１０は、例えば略直方体形状を有する筐体（不図示）の内部に格納される。フレキシブルプリント基板１０は、発光ユニット３、受光ユニット４それぞれに対応して１個ずつ設けられる。   DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the same element and the overlapping description is abbreviate | omitted. The optical transceiver 1 is included in an optical communication device. The optical transceiver 1 can be inserted into and removed from the optical communication device. As shown in FIG. 1, the optical transceiver 1 includes an external substrate 2, a light emitting unit 3, a light receiving unit 4, and a flexible printed circuit board 10. The external substrate 2, the light emitting unit 3, the light receiving unit 4, and the flexible printed circuit board 10 are stored in a housing (not shown) having a substantially rectangular parallelepiped shape, for example. One flexible printed circuit board 10 is provided corresponding to each of the light emitting unit 3 and the light receiving unit 4.

外部基板２は、略長方形の形状を有する。発光ユニット３は、外部基板２の長手方向の端部に配置される。発光ユニット３は、電気的な送信信号を光信号に変換して外部に送出する。発光ユニット３は、フレキシブルプリント基板１０を介して外部基板２に接続される。受光ユニット４は、外部基板２の長手方向の端部に配置される。受光ユニット４は、発光ユニット３と並んで配置される。受光ユニット４は、光通信装置に送られてきた光信号を電気的な受信信号に変換する。受光ユニット４は、フレキシブルプリント基板１０を介して、外部基板２に接続される。   The external substrate 2 has a substantially rectangular shape. The light emitting unit 3 is disposed at the end of the external substrate 2 in the longitudinal direction. The light emitting unit 3 converts an electrical transmission signal into an optical signal and sends it out. The light emitting unit 3 is connected to the external substrate 2 through the flexible printed circuit board 10. The light receiving unit 4 is disposed at the end of the external substrate 2 in the longitudinal direction. The light receiving unit 4 is arranged side by side with the light emitting unit 3. The light receiving unit 4 converts the optical signal sent to the optical communication device into an electrical reception signal. The light receiving unit 4 is connected to the external substrate 2 via the flexible printed circuit board 10.

フレキシブルプリント基板１０は、図２に示すように、補強板１１と、孔部１２と、カバーレイ１３と、補強用部材１４と、板状部１５と、第１の接合端子２０Ａと、第２の接合端子２０Ｂと、配線端子３０とを備える。フレキシブルプリント基板１０は、略長方形の平板状に形成される。フレキシブルプリント基板１０は、縁Ｅ１と縁Ｅ２とを有する。フレキシブルプリント基板１０は、縁Ｅ１から縁Ｅ２に向かう長手方向に延びている。フレキシブルプリント基板１０は、長手方向に延びる軸Ａｘに関して略対称に形成される。フレキシブルプリント基板１０は、長手方向の一端である端部Ａ２に、補強板１１と孔部１２とを備える。   As shown in FIG. 2, the flexible printed board 10 includes a reinforcing plate 11, a hole 12, a cover lay 13, a reinforcing member 14, a plate-like portion 15, a first joining terminal 20 </ b> A, a second The junction terminal 20B and the wiring terminal 30 are provided. The flexible printed circuit board 10 is formed in a substantially rectangular flat plate shape. The flexible printed circuit board 10 has an edge E1 and an edge E2. The flexible printed circuit board 10 extends in the longitudinal direction from the edge E1 toward the edge E2. The flexible printed circuit board 10 is formed substantially symmetrically with respect to an axis Ax extending in the longitudinal direction. The flexible printed board 10 includes a reinforcing plate 11 and a hole 12 at an end A2 that is one end in the longitudinal direction.

フレキシブルプリント基板１０は、軸Ａｘ方向の一端であってかつ端部Ａ２の反対側の端部Ａ１に、補強用部材１４と、第１の接合端子２０Ａと、第２の接合端子２０Ｂと、配線端子３０とを備える。端部Ａ１は、図３に示すように、第１領域Ａ１ａと第２領域Ａ１ｂとに分けられる。第１領域Ａ１ａは、第２領域Ａ１ｂよりも縁Ｅ１側に位置する。   The flexible printed circuit board 10 includes a reinforcing member 14, a first joint terminal 20A, a second joint terminal 20B, and a wiring at one end in the axis Ax direction and at an end A1 opposite to the end A2. And a terminal 30. As shown in FIG. 3, the end portion A1 is divided into a first region A1a and a second region A1b. The first region A1a is located closer to the edge E1 than the second region A1b.

補強用部材１４は、第２領域Ａ１ｂに設けられる。第１の接合端子２０Ａ、第２の接合端子２０Ｂ、及び配線端子３０は、第１領域Ａ１ａに設けられる。板状部１５は、可撓性を有する。板状部１５には、補強板１１、カバーレイ１３、補強用部材１４、第１の接合端子２０Ａ、第２の接合端子２０Ｂ及び配線端子３０が設けられている。   The reinforcing member 14 is provided in the second region A1b. The first joining terminal 20A, the second joining terminal 20B, and the wiring terminal 30 are provided in the first region A1a. The plate-like portion 15 has flexibility. The plate-like portion 15 is provided with a reinforcing plate 11, a cover lay 13, a reinforcing member 14, a first joining terminal 20A, a second joining terminal 20B, and a wiring terminal 30.

補強板１１は、略長方形の形状を有する。補強板１１は、例えば樹脂等の材料を有する。補強板１１は、フレキシブルプリント基板１０の端部Ａ２を補強するために設けられる。孔部１２は、円形状に形成される。孔部１２の外周部には、導通部１２ａが設けられる。孔部１２は、導電性材料からなるピン（不図示）が接合される。   The reinforcing plate 11 has a substantially rectangular shape. The reinforcing plate 11 includes a material such as a resin. The reinforcing plate 11 is provided to reinforce the end portion A2 of the flexible printed board 10. The hole 12 is formed in a circular shape. A conduction portion 12 a is provided on the outer peripheral portion of the hole portion 12. The hole 12 is joined to a pin (not shown) made of a conductive material.

配線端子３０は、縁Ｅ２側に端部３０ｅを有する。電気配線５０は、端部３０ｅから軸Ａｘ方向に延びている。電気配線５０は、導通部１２ａに電気接続されている。カバーレイ１３は、電気配線５０を覆うように保護する。カバーレイ１３は、配線保護部として機能する。カバーレイ１３は可撓性を有する。   The wiring terminal 30 has an end 30e on the edge E2 side. The electrical wiring 50 extends in the axis Ax direction from the end 30e. The electrical wiring 50 is electrically connected to the conduction portion 12a. The cover lay 13 protects the electric wiring 50 so as to cover it. The coverlay 13 functions as a wiring protection unit. The coverlay 13 has flexibility.

補強用部材１４は、例えば樹脂材料からなる。ただし、補強用部材１４の材料は、樹脂材料に限られず、カバーレイ１３より硬い材料のものであれば他の材料であってもよい。   The reinforcing member 14 is made of, for example, a resin material. However, the material of the reinforcing member 14 is not limited to the resin material, and may be other materials as long as the material is harder than the coverlay 13.

第１の接合端子２０Ａは、第１領域Ａ１ａにおいて軸Ａｘ方向に延びるように設けられる。第１の接合端子２０Ａは、導電性材料からなる。第１の接合端子２０Ａは、外部基板２上の端子に半田接合される。第２の接合端子２０Ｂは、第１領域Ａ１ａにおいて軸Ａｘ方向に延びるように設けられる。第２の接合端子２０Ｂは、導電性材料からなる。第２の接合端子２０Ｂは、外部基板２上の端子に半田接合される。   20 A of 1st junction terminals are provided so that it may extend in the axis | shaft Ax direction in 1st area | region A1a. The first joining terminal 20A is made of a conductive material. The first joining terminal 20A is soldered to a terminal on the external substrate 2. The second joint terminal 20B is provided so as to extend in the axis Ax direction in the first region A1a. The second joint terminal 20B is made of a conductive material. The second joint terminal 20B is soldered to a terminal on the external substrate 2.

第１の接合端子２０Ａの縁Ｅ１側には、第１の窪み２１Ａが設けられている。第１の窪み２１Ａは、第１の接合端子２０Ａと、板状部１５における第１の接合端子２０Ａに接する領域とに、縁Ｅ１から基準線Ｌ０に向けて形成されている。第２の接合端子２０Ｂの縁Ｅ１側には、第２の窪み２１Ｂが設けられている。第２の窪み２１Ｂは、第２の接合端子２０Ｂと、板状部１５における第２の接合端子２０Ｂに接する領域とに、縁Ｅ１から基準線Ｌ０に向けて形成されている。   A first recess 21A is provided on the edge E1 side of the first joining terminal 20A. The first recess 21A is formed from the edge E1 toward the reference line L0 in the first joint terminal 20A and a region of the plate-like portion 15 in contact with the first joint terminal 20A. A second recess 21B is provided on the edge E1 side of the second joint terminal 20B. The 2nd hollow 21B is formed in the area | region which contact | connects the 2nd junction terminal 20B and the 2nd junction terminal 20B in the plate-shaped part 15 toward the reference line L0 from the edge E1.

配線端子３０は、軸Ａｘ方向に延びている。配線端子３０の縁Ｅ１の反対側には電気配線５０が接続されている。第１の接合端子２０Ａ、配線端子３０及び第２の接合端子２０Ｂは、縁Ｅ１に沿って順に配置される。配線端子３０は、導電性材料からなる。配線端子３０は、外部基板２上に半田接合される。また、配線端子３０の板状部１５との接触面積は、第１の接合端子２０Ａの板状部１５との接触面積の２０％以上８０％以下となっている。更に、配線端子３０の板状部１５との接触面積は、第２の接合端子２０Ｂの板状部１５との接触面積の２０％以上８０％以下となっている。配線端子３０の縁Ｅ１側には、第１の窪み２１Ａと同様の窪み３１が設けられている。   The wiring terminal 30 extends in the axis Ax direction. An electrical wiring 50 is connected to the side of the wiring terminal 30 opposite to the edge E1. The first joining terminal 20A, the wiring terminal 30, and the second joining terminal 20B are arranged in order along the edge E1. The wiring terminal 30 is made of a conductive material. The wiring terminals 30 are soldered on the external substrate 2. The contact area of the wiring terminal 30 with the plate-like portion 15 is 20% or more and 80% or less of the contact area of the first joining terminal 20A with the plate-like portion 15. Furthermore, the contact area of the wiring terminal 30 with the plate-like portion 15 is 20% or more and 80% or less of the contact area of the second joint terminal 20B with the plate-like portion 15. A recess 31 similar to the first recess 21 </ b> A is provided on the edge E <b> 1 side of the wiring terminal 30.

以下では、フレキシブルプリント基板１０を光トランシーバ１に装着する手順について簡潔に説明する。まず、図１に示すようにフレキシブルプリント基板１０を撓ませる。そして、ピン（不図示）を孔部１２に挿入してフレキシブルプリント基板１０の縁Ｅ２側を発光ユニット３又は受光ユニット４に固定保持させる。そして、第１の接合端子２０Ａ及び第２の接合端子２０Ｂを上述したように外部基板２上に半田接合させる。こうして、フレキシブルプリント基板１０を介して発光ユニット３及び受光ユニット４が外部基板２に接続される。   Hereinafter, a procedure for mounting the flexible printed circuit board 10 to the optical transceiver 1 will be briefly described. First, the flexible printed circuit board 10 is bent as shown in FIG. Then, a pin (not shown) is inserted into the hole 12 to fix and hold the edge E2 side of the flexible printed circuit board 10 to the light emitting unit 3 or the light receiving unit 4. Then, the first joining terminal 20A and the second joining terminal 20B are solder-joined on the external substrate 2 as described above. Thus, the light emitting unit 3 and the light receiving unit 4 are connected to the external substrate 2 via the flexible printed circuit board 10.

本実施形態に係るフレキシブルプリント基板１０の端部Ａ１の構成を、図３を参照しながら、以下で説明する。カバーレイ１３は、縁Ｅ１側に端部１３ｅを有する。第１の接合端子２０Ａは、縁Ｅ２側に端部２０Ａｅを有する。第２の接合端子２０Ｂは、縁Ｅ２側に端部２０Ｂｅを有する。基準線Ｌ０と、直線Ｌ１と、直線Ｌ２とは、縁Ｅ１が延びる方向に延びる直線である。基準線Ｌ０は、第１領域Ａ１ａにある端部１３ｅを通る。直線Ｌ１は、第１領域Ａ１ａと第２領域Ａ１ｂとの境目にある端部２０Ａｅと端部２０Ｂｅとを通る。直線Ｌ２は、第１領域Ａ１ａにある端部３０ｅを通る。また、図中符号Ａは、縁Ｅ１から直線Ｌ２までの距離を示す。図中符号Ｂは、縁Ｅ１から基準線Ｌ０までの距離を示す。図中符号Ｃは、カバーレイ１３の軸Ａｘ方向の貼り付け公差を示す。図中符号Ｄは、縁Ｅ１から直線Ｌ１までの距離を示す。   The configuration of the end A1 of the flexible printed circuit board 10 according to this embodiment will be described below with reference to FIG. The coverlay 13 has an end 13e on the edge E1 side. The first joining terminal 20A has an end 20Ae on the edge E2 side. The second joint terminal 20B has an end 20Be on the edge E2 side. The reference line L0, the straight line L1, and the straight line L2 are straight lines extending in the direction in which the edge E1 extends. The reference line L0 passes through the end portion 13e in the first region A1a. The straight line L1 passes through the end 20Ae and the end 20Be at the boundary between the first area A1a and the second area A1b. The straight line L2 passes through the end 30e in the first region A1a. Moreover, the code | symbol A in a figure shows the distance from the edge E1 to the straight line L2. A symbol B in the figure indicates a distance from the edge E1 to the reference line L0. Reference symbol C in the drawing indicates a pasting tolerance of the coverlay 13 in the axis Ax direction. A symbol D in the figure indicates a distance from the edge E1 to the straight line L1.

そこで、本実施形態のフレキシブルプリント基板１０では、Ａ＜Ｂ＜Ｄとなっている。すなわち、端部３０ｅは、直線Ｌ１及び基準線Ｌ０よりも縁Ｅ１側に位置する。そして、端部２０Ａｅと端部２０Ｂｅとは、基準線Ｌ０よりも縁Ｅ１の反対側に位置する。そして、端部１３ｅは、基準線Ｌ０にまで延在する。すなわち、基準線Ｌ０は、端部３０ｅよりも縁Ｅ２側、かつ端部２０Ａｅ及び端部２０Ｂｅよりも縁Ｅ１側に位置する。そして、上記Ｃについては、Ｄ−Ａ≧Ｃの関係を満たす。すなわち、カバーレイ１３の貼り付け公差は、第１の接合端子２０Ａの軸Ａｘ方向の長さと配線端子３０の軸Ａｘ方向の長さとの差の範囲内、かつ第２の接合端子２０Ｂの軸Ａｘ方向の長さと配線端子３０の軸Ａｘ方向の長さとの差の範囲内に収まる。この構成により、カバーレイ１３の縁Ｅ１側の電気配線５０が露出した部分（図３参照）では曲げが生じないようにすることが可能となる。そして、電気配線５０における銅箔の剥がれ落ちを防止することができる。   Therefore, in the flexible printed circuit board 10 of the present embodiment, A <B <D. That is, the end 30e is located closer to the edge E1 than the straight line L1 and the reference line L0. The end 20Ae and the end 20Be are located on the opposite side of the edge E1 from the reference line L0. The end portion 13e extends to the reference line L0. That is, the reference line L0 is located on the edge E2 side from the end portion 30e and on the edge E1 side from the end portions 20Ae and 20Be. And about said C, the relationship of DA> C is satisfy | filled. That is, the bonding tolerance of the coverlay 13 is within the range of the difference between the length of the first joining terminal 20A in the axis Ax direction and the length of the wiring terminal 30 in the axis Ax direction, and the axis Ax of the second joining terminal 20B. It falls within the range of the difference between the length in the direction and the length of the wiring terminal 30 in the axis Ax direction. With this configuration, it is possible to prevent bending at the portion where the electrical wiring 50 on the edge E1 side of the cover lay 13 is exposed (see FIG. 3). And the peeling off of the copper foil in the electrical wiring 50 can be prevented.

以上のように構成されるフレキシブルプリント基板１０の作用について従来の技術を説明しながら以下で説明する。まず、ＸＭＤ−ＭＳＡ（10Gbit/s Miniature Device Multi Source Agreement）では、ＯＳＡに搭載されるデバイスの仕様が共通化されている。ＸＭＤ−ＭＳＡでは、例えば図４の（Ａ）部に示すように、デバイスの放熱部に近い位置に高周波信号ピンが配置される。放熱部の熱は、光トランシーバのハウジングを介して外部へ放出される。このため、デバイスの放熱部は、ハウジング近傍に配置することが好ましい。よって、デバイスの複数のピンのうち高周波信号ピンは放熱部に近い場所に位置する。また、ＳＦＰ−ＭＳＡ（Small Form factor Pluggable Multi Source Agreement）では、光トランシーバの形状等が共通化されている。ＳＦＰ−ＭＳＡでは、回路基板上には送信回路や受信回路が設けられる。回路基板上に電子部品が実装される。   The operation of the flexible printed circuit board 10 configured as described above will be described below while explaining conventional techniques. First, in XMD-MSA (10 Gbit / s Miniature Device Multi Source Agreement), specifications of devices mounted on OSA are standardized. In XMD-MSA, for example, as shown in part (A) of FIG. 4, a high-frequency signal pin is arranged at a position close to the heat dissipation part of the device. The heat of the heat radiating part is released to the outside through the housing of the optical transceiver. For this reason, it is preferable to arrange | position the thermal radiation part of a device in the housing vicinity. Therefore, among the plurality of pins of the device, the high frequency signal pin is located at a location near the heat radiating portion. Also, in the SFP-MSA (Small Form Factor Pluggable Multi Source Agreement), the shape of the optical transceiver is shared. In SFP-MSA, a transmission circuit and a reception circuit are provided on a circuit board. Electronic components are mounted on the circuit board.

ＯＳＡと回路基板とはフレキシブルプリント基板により接続される。フレキシブルプリント基板は、ＯＳＡと回路基板との位置のバラツキを吸収する。このため信頼性が高い接続が得られる。ここで、フレキシブルプリント基板の配置について、例えば図４の（Ａ）部のように回路配線と接続したフレキシブルプリント基板を曲げてデバイスの端子と接続する構造がある。この構造を採用した場合、フレキシブルプリント基板が、回路基板から剥がされにくくなるという効果が得られる。しかしながら、図４の（Ａ）部の構造では、高周波信号線のピンを迂回して配線させなければならない。よって、高周波信号の品質が劣化する虞がある。高周波信号線は、なるべく短く直線的に配置されることが望ましいからである。   The OSA and the circuit board are connected by a flexible printed board. The flexible printed board absorbs variations in the positions of the OSA and the circuit board. For this reason, a highly reliable connection is obtained. Here, as for the arrangement of the flexible printed circuit board, there is a structure in which the flexible printed circuit board connected to the circuit wiring is bent and connected to the terminal of the device as shown in FIG. When this structure is adopted, an effect is obtained that the flexible printed board is hardly peeled off from the circuit board. However, in the structure of part (A) in FIG. 4, the pins of the high-frequency signal line must be routed around. Therefore, there is a possibility that the quality of the high frequency signal is deteriorated. This is because it is desirable that the high-frequency signal lines be arranged as short and linear as possible.

そこで、図４の（Ｂ）部のような構造が考えられる。この構造では、高周波信号ピンと基板側端子とは直線的に配線される。しかしながら、基板上の回路配線とフレキシブルプリント基板とは、基板を貫通するビアを介して接続される。従って、高周波信号がビアを経由することになり、やはり信号品質にとって好ましくない。   Therefore, a structure like the part (B) of FIG. 4 can be considered. In this structure, the high frequency signal pin and the board side terminal are wired linearly. However, the circuit wiring on the board and the flexible printed board are connected via vias that penetrate the board. Accordingly, the high frequency signal passes through the via, which is also not preferable for the signal quality.

また、図４の（Ｃ）部の構造ではフレキシブルプリント基板の高周波信号線を直線的に配置できる。またビアを介さないので良好な信号品質が得られる。ただし、この構造には、フレキシブルプリント基板と回路基板との接続部近傍に曲げが生じる場合がある。すなわち、この構造を採用した場合、接続部近傍に引きはがす方向の力が加わったとき、配線端子の銅箔が剥がれ断線する場合がある。   Further, in the structure of part (C) of FIG. 4, the high-frequency signal lines of the flexible printed circuit board can be arranged linearly. Further, since no via is provided, good signal quality can be obtained. However, in this structure, bending may occur in the vicinity of the connection portion between the flexible printed circuit board and the circuit board. That is, when this structure is adopted, when a force in the peeling direction is applied in the vicinity of the connection portion, the copper foil of the wiring terminal may be peeled off and disconnected.

図４の（Ａ）部〜（Ｃ）部に示したフレキシブルプリント基板に対して、本実施形態に係るフレキシブルプリント基板１０は、可撓性を有する板状部１５を備えており板状部１５に電気配線５０が設けられている。フレキシブルプリント基板１０は、板状部１５の一の端部Ａ１に設けられており電気配線５０に接続される配線端子３０と、端部Ａ１に設けられており外部基板２に接合される第１の接合端子２０Ａ及び第２の接合端子２０Ｂとを備える。第１の接合端子２０Ａ、配線端子３０及び第２の接合端子２０Ｂは、端部Ａ１の縁Ｅ１に沿って順に配置される。第１の接合端子２０Ａ、配線端子３０及び第２の接合端子２０Ｂは、縁Ｅ１から縁Ｅ１に交差する軸Ａｘ方向に延びている。更に、第１の接合端子２０Ａ及び第２の接合端子２０Ｂは、端部Ａ１を通り縁Ｅ１に沿って延びる基準線Ｌ０を越えて、縁Ｅ１から延びている。一方、配線端子３０は、基準線Ｌ０を越えることなく縁Ｅ１と基準線Ｌ０との間の領域内において縁Ｅ１から延びている。   In contrast to the flexible printed circuit board shown in FIGS. 4A to 4C, the flexible printed circuit board 10 according to this embodiment includes a flexible plate-like part 15, and the plate-like part 15. The electric wiring 50 is provided in this. The flexible printed circuit board 10 is provided at one end A <b> 1 of the plate-like part 15 and is connected to the electrical wiring 50, and the first is provided at the end A <b> 1 and joined to the external board 2. The junction terminal 20A and the second junction terminal 20B are provided. 20 A of 1st junction terminals, the wiring terminal 30, and the 2nd junction terminal 20B are arrange | positioned in order along the edge E1 of edge part A1. The first joint terminal 20A, the wiring terminal 30, and the second joint terminal 20B extend from the edge E1 in the axis Ax direction that intersects the edge E1. Further, the first joining terminal 20A and the second joining terminal 20B extend from the edge E1 beyond a reference line L0 that passes through the end A1 and extends along the edge E1. On the other hand, the wiring terminal 30 extends from the edge E1 in a region between the edge E1 and the reference line L0 without exceeding the reference line L0.

すなわち、配線端子３０の端部３０ｅは、基準線Ｌ０よりも縁Ｅ１側に位置する。一方、端部２０Ａｅと端部２０Ｂｅは、基準線Ｌ０よりも縁Ｅ２側に位置する。よって、配線端子３０の縁Ｅ２側が第１の接合端子２０Ａ及び第２の接合端子２０Ｂにより半田接合されているため、配線端子３０に曲げが生じないようにすることが可能となる。従って、フレキシブルプリント基板１０の場合、図４の（Ａ）部〜（Ｃ）部のフレキシブルプリント基板とは異なり、配線端子３０の銅箔が剥がれたり断線したりする事態を防止することが可能となる。そして、信号品質を維持することができる。   That is, the end 30e of the wiring terminal 30 is located on the edge E1 side with respect to the reference line L0. On the other hand, the end 20Ae and the end 20Be are located closer to the edge E2 than the reference line L0. Therefore, since the edge E2 side of the wiring terminal 30 is soldered by the first joining terminal 20A and the second joining terminal 20B, the wiring terminal 30 can be prevented from being bent. Therefore, in the case of the flexible printed circuit board 10, unlike the flexible printed circuit board shown in FIGS. 4A to 4C, it is possible to prevent a situation in which the copper foil of the wiring terminal 30 is peeled off or disconnected. Become. And signal quality can be maintained.

また、本実施形態に係るフレキシブルプリント基板１０は、第１の接合端子２０Ａ、第２の接合端子２０Ｂ及び配線端子３０そのものの構成に特徴を有する。よって、信号品質を維持するための追加部品は不要である。従って、コストを抑えることができる。更に基板上に追加部品のための領域を設ける必要がない。このため、設計自由度の確保が可能となり省スペースを実現できる。   The flexible printed circuit board 10 according to the present embodiment is characterized by the configuration of the first joint terminal 20A, the second joint terminal 20B, and the wiring terminal 30 itself. Thus, no additional parts are required to maintain signal quality. Therefore, the cost can be suppressed. Furthermore, it is not necessary to provide an area for additional parts on the substrate. For this reason, it is possible to secure a degree of freedom in design and to realize space saving.

また、本実施形態に係るフレキシブルプリント基板１０では、板状部１５の上に設けられており電気配線５０を覆うカバーレイ１３を更に備える。そして、カバーレイ１３は、端部１３ｅにおいて基準線Ｌ０まで延在する。すなわち、端部１３ｅは、端部２０Ａｅ及び端部２０Ｂｅよりも縁Ｅ１側に位置する。このため、曲げは端部１３ｅよりも縁Ｅ２側で生じることになる。よって、カバーレイ１３の縁Ｅ１側の電気配線５０が露出した部分（図３参照）では曲げを生じないようにすることが可能となる。そして、電気配線５０における銅箔の剥がれ落ちを防止することができる。   The flexible printed circuit board 10 according to the present embodiment further includes a cover lay 13 provided on the plate-like portion 15 and covering the electric wiring 50. The cover lay 13 extends to the reference line L0 at the end 13e. That is, the end 13e is located closer to the edge E1 than the end 20Ae and the end 20Be. For this reason, bending occurs on the edge E2 side from the end portion 13e. Therefore, it is possible to prevent bending at the portion where the electrical wiring 50 on the edge E1 side of the cover lay 13 is exposed (see FIG. 3). And the peeling off of the copper foil in the electrical wiring 50 can be prevented.

また、本実施形態に係るフレキシブルプリント基板１０では、配線端子３０が板状部１５に接している面の面積は、第１の接合端子２０Ａが板状部１５に接している面の面積の２０％以上８０％以下の範囲内、及び、第２の接合端子２０Ｂが板状部１５に接している面の面積の２０％以上８０％以下の範囲内にある。このため、フレキシブルプリント基板１０をより強固に外部基板２に接合させることができ、断線を回避することができる。   Further, in the flexible printed circuit board 10 according to the present embodiment, the area of the surface where the wiring terminal 30 is in contact with the plate-like portion 15 is 20 of the area of the surface where the first joining terminal 20A is in contact with the plate-like portion 15. % In the range from 80% to 80% and in the range from 20% to 80% of the area of the surface where the second joining terminal 20B is in contact with the plate-like portion 15. For this reason, the flexible printed circuit board 10 can be more firmly joined to the external substrate 2, and disconnection can be avoided.

また、本実施形態に係るフレキシブルプリント基板１０では、第１の接合端子２０Ａと、板状部１５における第１の接合端子２０Ａに接する領域とに、縁Ｅ１から基準線Ｌ０に向けて第１の窪み２１Ａが形成される。そして、第２の接合端子２０Ｂと、板状部１５における第２の接合端子２０Ｂに接する領域とに、縁Ｅ１から基準線Ｌ０に向けて第２の窪み２１Ｂが形成されている。従って、半田接合時に第１の窪み２１Ａ及び第２の窪み２１Ｂに半田を盛ることが可能となる。よって、フレキシブルプリント基板１０をより強固に外部基板２に接合させることができ、断線を回避することができる。   Further, in the flexible printed circuit board 10 according to the present embodiment, the first joint terminal 20A and the region in contact with the first joint terminal 20A in the plate-like portion 15 have a first direction from the edge E1 toward the reference line L0. A recess 21A is formed. And the 2nd hollow 21B is formed in the area | region which contact | connects the 2nd junction terminal 20B and the 2nd junction terminal 20B in the plate-shaped part 15 toward the reference line L0 from the edge E1. Therefore, it is possible to deposit solder in the first recess 21A and the second recess 21B during solder joining. Therefore, the flexible printed circuit board 10 can be more firmly bonded to the external substrate 2, and disconnection can be avoided.

また、本実施形態に係るフレキシブルプリント基板１０では、補強用部材１４を更に備える。端部Ａ１は、第１領域Ａ１ａ及び第２領域Ａ１ｂからなる。第１領域Ａ１ａは、第２領域Ａ１ｂに接続している。第１領域Ａ１ａ及び第２領域Ａ１ｂは、基準線Ｌ０と交差する軸Ａｘ方向に配置される（図３参照）。そして、第１の接合端子２０Ａ、配線端子３０及び第２の接合端子２０Ｂは、第１領域Ａ１ａに設けられている。一方、補強用部材１４は、第２領域Ａ１ｂに設けられている。従って、曲げが生じうる第２領域Ａ１ｂを補強することができる。そして、電気配線５０の露出部分と、配線端子３０とが保護され、銅箔の剥がれ落ちや断線を回避できる。   The flexible printed circuit board 10 according to the present embodiment further includes a reinforcing member 14. The end A1 includes a first area A1a and a second area A1b. The first area A1a is connected to the second area A1b. The first region A1a and the second region A1b are arranged in the direction of the axis Ax that intersects the reference line L0 (see FIG. 3). The first joint terminal 20A, the wiring terminal 30, and the second joint terminal 20B are provided in the first region A1a. On the other hand, the reinforcing member 14 is provided in the second region A1b. Therefore, it is possible to reinforce the second region A1b where bending can occur. And the exposed part of the electrical wiring 50 and the wiring terminal 30 are protected, and peeling off and disconnection of copper foil can be avoided.

なお、上述した実施形態では、配線端子３０が例えば６個並んで設けられ、第１の接合端子２０Ａ及び第２の接合端子２０Ｂが配線端子３０の両側に設けられる例について説明した。しかし、第１の接合端子２０Ａ、第２の接合端子２０Ｂ及び配線端子３０の配置及び数については適宜変更することが可能である。   In the embodiment described above, an example in which, for example, six wiring terminals 30 are provided side by side and the first joint terminal 20A and the second joint terminal 20B are provided on both sides of the wiring terminal 30 has been described. However, the arrangement and number of the first joining terminals 20A, the second joining terminals 20B, and the wiring terminals 30 can be appropriately changed.

また、上述した実施形態では、第１の窪み２１Ａ、第２の窪み２１Ｂ、及び窪み３１が設けられる例について説明した。しかし、第１の窪み２１Ａ、第２の窪み２１Ｂ及び窪み３１の個数、位置及び形状は、適宜変更することが可能である。また、第１の窪み２１Ａ、第２の窪み２１Ｂ、又は窪み３１はなくてもよい。   Moreover, in embodiment mentioned above, the example in which the 1st hollow 21A, the 2nd hollow 21B, and the hollow 31 were provided was demonstrated. However, the number, position, and shape of the first depression 21A, the second depression 21B, and the depression 31 can be changed as appropriate. Further, the first depression 21A, the second depression 21B, or the depression 31 may not be provided.

また、上述した実施形態では、略長方形状を呈し樹脂等の材料により構成される補強板１１と、円形状に形成される孔部１２とについて説明した。しかし、補強板１１の形状、位置等は、適宜変更可能である。孔部１２の形状、位置等も適宜変更可能である。さらに、上述した実施形態では、補強用部材１４が設けられる例について説明したが、補強用部材１４を設けない構成であることができる。   Further, in the above-described embodiment, the reinforcing plate 11 having a substantially rectangular shape and made of a material such as a resin and the hole 12 formed in a circular shape have been described. However, the shape, position, and the like of the reinforcing plate 11 can be changed as appropriate. The shape, position, and the like of the hole 12 can be changed as appropriate. Furthermore, in the above-described embodiment, an example in which the reinforcing member 14 is provided has been described, but a configuration in which the reinforcing member 14 is not provided may be employed.

また、上述した実施形態では、フレキシブルプリント基板１０が光トランシーバ１に用いられる例について説明した。しかし、光トランシーバ１以外の装置にもフレキシブルプリント基板１０を適用させることは可能である。   In the above-described embodiment, the example in which the flexible printed circuit board 10 is used for the optical transceiver 1 has been described. However, it is possible to apply the flexible printed circuit board 10 to devices other than the optical transceiver 1.

１…光トランシーバ、２…回路基板、３…発光ユニット、４…受光ユニット、１０…フレキシブルプリント基板、１１…補強板、１２…孔部、１３…カバーレイ（配線保護部）、１４…補強部材、２０Ａ…第１の接合端子、２０Ａｅ…端部、２０Ｂ…第２の接合端子、２０Ｂｅ…端部、２１Ａ…第１の窪み、２１Ｂ…第２の窪み、３０…配線端子、３０ｅ…端部、３１…窪み、５０…電気配線、Ｌ０…基準線、Ｌ１，Ｌ２…直線、Ａ１…端部、Ａ１ａ…第１領域、Ａ１ｂ…第２領域、Ｅ１，Ｅ２…縁。   DESCRIPTION OF SYMBOLS 1 ... Optical transceiver, 2 ... Circuit board, 3 ... Light emitting unit, 4 ... Light receiving unit, 10 ... Flexible printed circuit board, 11 ... Reinforcement board, 12 ... Hole part, 13 ... Cover lay (wiring protection part), 14 ... Reinforcement member , 20A ... first junction terminal, 20Ae ... end, 20B ... second junction terminal, 20Be ... end, 21A ... first depression, 21B ... second depression, 30 ... wiring terminal, 30e ... end , 31 ... depression, 50 ... electrical wiring, L0 ... reference line, L1, L2 ... straight line, A1 ... end, A1a ... first region, A1b ... second region, E1, E2 ... edge.

Claims (5)

可撓性を有する板状部を備えており前記板状部に電気配線が設けられているフレキシブルプリント基板であって、
前記板状部の一の端部に設けられており前記電気配線に接続される配線端子と、
前記端部に設けられており外部基板に接合される第１及び第２の接合端子とを備え、
前記第１の接合端子、前記配線端子及び前記第２の接合端子は、前記端部の縁に沿って順に配置され、
前記第１の接合端子、前記配線端子及び前記第２の接合端子は、前記縁から前記縁に交差する方向に延びており、
前記第１の接合端子及び前記第２の接合端子は、前記端部を通り前記縁に沿って延びる基準線を越えて、前記縁から延びており、
前記配線端子は、前記基準線を越えることなく前記縁と前記基準線との間の領域内において前記縁から延びている、フレキシブルプリント基板。 A flexible printed circuit board comprising a flexible plate-like portion and provided with electrical wiring on the plate-like portion,
A wiring terminal provided at one end of the plate-like portion and connected to the electrical wiring;
First and second joining terminals provided at the end and joined to an external substrate;
The first joint terminal, the wiring terminal, and the second joint terminal are sequentially arranged along an edge of the end portion,
The first joint terminal, the wiring terminal, and the second joint terminal extend from the edge in a direction intersecting the edge,
The first junction terminal and the second junction terminal extend from the edge beyond a reference line extending through the edge and along the edge;
The flexible printed circuit board, wherein the wiring terminal extends from the edge in a region between the edge and the reference line without exceeding the reference line. 前記板状部の上に設けられており前記電気配線を覆う配線保護部を更に備え、
前記配線保護部は、前記端部において前記基準線まで延在する、ことを特徴とする請求項１に記載のフレキシブルプリント基板。 A wiring protection part that is provided on the plate-like part and covers the electrical wiring;
The flexible printed circuit board according to claim 1, wherein the wiring protection portion extends to the reference line at the end portion. 前記配線端子が前記板状部に接している面の面積は、前記第１の接合端子が前記板状部に接している面の面積の２０％以上８０％以下の範囲内、及び、前記第２の接合端子が前記板状部に接している面の面積の２０％以上８０％以下の範囲内にある、ことを特徴とする請求項１又は請求項２に記載のフレキシブルプリント基板。   The area of the surface where the wiring terminal is in contact with the plate-like portion is within the range of 20% to 80% of the area of the surface where the first joining terminal is in contact with the plate-like portion, and the first 3. The flexible printed circuit board according to claim 1, wherein two joining terminals are in a range of 20% to 80% of an area of a surface in contact with the plate-like portion. 前記第１の接合端子と、前記板状部における前記第１の接合端子に接する領域とに、前記縁から前記基準線に向けて窪みが形成され、
前記第２の接合端子と、前記板状部における前記第２の接合端子に接する領域とに、前記縁から前記基準線に向けて窪みが形成されている、ことを特徴とする請求項１〜請求項３のいずれか一項に記載のフレキシブルプリント基板。 A recess is formed from the edge toward the reference line in the first joint terminal and a region in contact with the first joint terminal in the plate-shaped portion,
2. A recess is formed from the edge toward the reference line in the second joint terminal and a region of the plate-like portion that contacts the second joint terminal. The flexible printed circuit board as described in any one of Claim 3. 補強用部材を更に備え、
前記端部は、第１領域及び第２領域からなり、
前記第１領域は、前記第２領域に接続しており、
前記第１領域及び前記第２領域は、前記基準線と交差する方向に配置され、
前記第１の接合端子、前記配線端子及び前記第２の接合端子は、前記第１領域に設けられ、
前記補強用部材は、前記第２領域に設けられている、ことを特徴とする請求項１〜請求項４のいずれか一項に記載のフレキシブルプリント基板。 It further includes a reinforcing member,
The end portion includes a first region and a second region,
The first region is connected to the second region;
The first region and the second region are arranged in a direction intersecting the reference line,
The first joint terminal, the wiring terminal, and the second joint terminal are provided in the first region,
The flexible printed circuit board according to any one of claims 1 to 4, wherein the reinforcing member is provided in the second region.
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