1375367 六、發明說明： 【發明所屬之技術領域】 本發明係有關於一種同軸電纜線束之連接構造，其中 線束將複數條成彼此平行配置之同軸電纜被連接至複數個 - 連接終端。 【先前技術】 近年來，極薄之同軸電纜被用以將一設備主體連接至 一液晶顯示器，或被用於一諸如筆記型電腦、手機、或小 ® 型攝影機之設備內的電線。一具有線束形狀之同軸電纜線 束（其中複數條同軸電纜被聚集並彼此結合成一體）被用 以實現接線簡易性（參見專利文件1 )。 使用於此同軸電纜線束之諸同軸電纜中的每一條之構 造爲，一芯導電體、一內絕緣體、一外導電體、及一護套 係以同軸之形狀自內側起依序地被配置。 這些複數同軸電纜被聚集並彼此結合成一體以形成同 軸電纜線束。此同軸電纜線束之一末端被連接並固定至複 ® 數個以一預定間距被配置之連接器終端，或以一諸如軟焊 之導電性連接方式被連接並固定至一電路板。一與同軸電 纜線束相關之技藝的範例被顯示於第7及8圖中。 第7及8圖係揭示一種同軸電纜線束1之一末端的圖 式。在此同軸電纜線束1中，複數條同軸電纜2及絕緣電 纜3係成彼此平行配置。複數條同軸電纜2之諸外導電體 2a及複數條，辑緣電纜3之芯導電體3a被導電地連接至共同 接地棒4及5»複數個末端接地部4a被設置在此諸共同接 1375367 地棒4及5之兩末端上，並被導電地連接至一連接部以便 接地。在與接地棒4之諸末端接地部4a不同之諸部分中， 由複數個接地插銷6所構成之複數個中間接地部被設置在 接地棒4與諸絕緣電纜3的芯導電體3a之間。諸接地插銷 6中之每一者被導電地連接至諸芯導電體3a及接地棒4中 之每一者。此外，諸接地插銷6中之每一者被導電地連接 至藉由軟焊而被設置在一連接構件7(諸如一電路板或一 連接器）上之複數個連接終端8中之每一者。藉此構形， 連接構件7之位置被固定在接地棒4之兩末端處（末端接 地部4a)以便達成接地，且此接地亦可在接地棒4之諸中 間接地部（諸接地插銷6)處而達成。 〔專利文件 1〕 JP-A-2007-280772 在軟焊之前，諸中間接地部具有一以直線型式延伸於 與接地棒之主體相同之平面上的形狀》然而，在執行此軟 焊之際，諸中間接地部被壓成弧形，使得此諸中間接地部 之諸前端可被連接至諸連接終端（參見第7圖）。因此，在 與此諸連接終端相連接後，由於變成弧形所殘餘應力係存 在於諸中間接地部內部。當此殘餘應力大時，諸中間接地 部可能就在軟焊之後立即與諸連接終端分離。除此之外， 當在包裝後發生振動時，諸中間接地部亦可能由於此殘餘 應力而與諸連接終端分離。當此問題發生時，一在接地棒 之中央部分處之接地性能將變成不穩定，且因此噪音消除 功效可能無法充分地發揮。 【發明内容】 本發明提供一種同軸電纜線束之連接構造，其能確保 1375367 一接地棒得有一穩固之接地狀態，同時可實現在同軸電纜 9 之芯導電體與連接終端之間的穩固的導電連接〃 根據本發明之第一態樣，在一種同軸電纜線束之連接 構造中，連接一線束及複數個終端於其中複數條同軸電纜 係配置成彼此平行，且諸複數條同軸電纜中之每一者均包 . 含一芯導電體、一被配置成圍繞在芯導電體之外圍的內絕 緣體、一被配置成圍繞在內絕緣體之外圍的外導電體，及 一被配置成圍繞在外導電體之外圍的護套。複數條同軸電 φ 纜之外導電體被導電地連接至一共同接地棒。此接地棒包 括一主體及一突出部，此主體係朝該複數條同軸電纜配置 _ 之方向延伸，而此突出部則於一與此主體之兩末端不同之 部分自主體處突出而延伸。此突出部具有一終端連接部及 一窄寬部，而此窄寬部具有一比終端連接部之寬度狹的寬 度，並被形成於接地棒之終端連接部與主體間。複數個連 接終端係成彼此平行配置，且一中間接地連接終端係成與 此諸連接終端相平行地被配置。諸芯導電體藉由在諸同軸 • 電纜之末端處軟焊而被導電地連接至諸連接終端，而接地 棒之終端連接部則被導電地連接至中間接地連接終端。 根據本發明之第二態樣，窄寬部之寬度可不大於終端 連接部之寬度的5/6且不小於終端連接部之寬度的1/4。 根據本發明之第三態樣，接地棒可在由一衝模衝壓成 型後予以電鍍。 本發明之其他態樣及優點將由下列之說明、圖式與申 請專利範圍而得以了解。 【實施方式】 1375367 下文中將參照根據本發明之實施例之圖式而說明同軸 電纜線束之連接構造。 此外，根據本發明所實施之同軸電纜線束的連接構造 係可以各種不同之型式予以實現的，其中例如一連接器被 - 附接至此同軸電纜線束之兩末端，或一連接器僅被附接至 . 此同軸電纜線束之一末端，而一電路板則被附接至此同軸 電纜線束之另一末端。下文中將敘述一位於此同軸電纜線 束之一端側上的連接構造以及此同軸電纜線束之連接方 • 法。 第1圖係揭示一根據本發明實施例之同軸電纜線束之 連接構造的平面圖。第2圖係揭示用於第1圖所示之同軸 電纜線束中之同軸電纜的剖面圖。第3圖係沿第1圖中之 A-A線所取之剖面圖。 如第1圖中所示，一同軸電纜線束1〇具有一連接構 造，其中複數條相同種類及相同大小之同軸電纜20 (例如 34條同軸電纜）成彼此平行而配置。此諸同軸電纜20之 • 外導電體23在諸同軸電纜20之兩末端的軸向方向被導電 地連接至一共同接地棒14。諸同軸電纜20之芯導電體21 及接地棒14藉由軟焊分別被導電地連接至複數個連接終 端17及成彼此平行配置之中間接地連接終端17a。此外， 此諸連接終端17及中間接地連接終端l*7a係以一預定間距 (例如0.3mm)而成彼此平行地設置在一連接構件11上， 而此連接構件係一連接器或一電路板。 如第2圖中所示，每一條同軸電纜20具有由同軸地配 置的芯導電體21、內絕緣體22、外導電體23及絕緣護套 1375367 24所形成之結構。內絕緣體22被配置成圍繞在芯導 21之外圍。外導電體23被配置成圍繞在內絕緣體22 圍。絕緣護套24被配置成圍繞在外導電體23之外圍 例如可使用一符合美制線規 AMG( American Gage)標準之AWG 42電纜，或比AWG 42更細之電 爲同軸電纜20。在此AWG 42同軸電纜20中，芯導 21係藉由例如捻搓七條被電鍍以銀而具有0.025 mm 之銅合金線21a所形成。內絕緣體22係由塗敷在芯導 21之外圍表面上的氟素樹脂（例如PFA )所構成而具有 mm之外徑。外導電體23係藉由例如在內絕緣體22之 表面周圍以螺旋方式捲繞複數條被電鍍以銀並具有 mm外徑之銅合金線23a所形成而具有0.23 mm之外名 套24則係由塗敷在外導電體23之外圍表面上的氟素 (例如PFA )所構成。在AWG 42之情形中，護套24 徑係 0.3 1 m m。 如第1及3圖中所示，每一條同軸電纜20之末端 行一入口形成處理。芯導電體21、內絕緣體22及 體23依序地從每一條同軸電纜20之前端起被裸露一 之長度。在此同軸電纜線束10中，所有的同軸電纜 成彼此平行地配置，且諸外導電體23被插置於兩個； 地棒14及15之間並藉由軟焊而被導電地連接至此諸 棒14及15 。 此外，此同軸電纜線束10可具有多條絕緣電纜， 含與同軸電纜20不同的芯導電體及護套。 諸接地棒14及15被形成爲一具有某種厚度之枋 電體 之外 〇 Wire 纜作 電體 外徑 電體 0.17 外圍 0.03 1。護 樹脂 之外 被進 導電 預定 20係 同接 接地 各包 :狀， 1375367 其具有可與所有同軸電纜20之諸外導電體23相接觸之長 度，而此諸同軸電纜20之諸護套係彼此相接觸，或係以一 預定間距平行地被配置。例如，諸接地棒14及15係藉由 衝壓一導電金屬板（諸如銅板）而被製成》接地棒15被安 • 置成可與連接構件11更爲接近，且具有一薄矩形之形狀在 諸同軸電纜20之平行方向延伸。接地棒14被安置成遠離 此連接構件11，且包括一主體16及一突出部13。此主體 16具有一薄矩形的形狀，在諸同軸電纜20之平行方向上 φ 延伸。此突出部13從主體16於與被配置在此主體16之兩 末端處的末端接地部分18不同之部分，在諸同軸電纜20 ' 之軸向方向延伸。 諸接地棒14及15具有諸共同之末端接地部18,於兩 末端處在諸同軸電纜20之平行方向，藉由軟焊而被導電地 連接至連接構件11之諸接地終端17c。 接地棒14之突出部13，藉由以軟焊方式導電地連接 —或複數個中間接地連接終端17a，而可當作此接地棒Η # 之一中間接地部。根據本實施例，此突出部13係與接地棒 14之主體16 —體成型。 在此接地棒之突出部13中，一具有比一終端連接部 13d之寬度狹窄之寬度的窄寬部13c被形成於此被導電地 連接至中間接地連接終端17a處之終端連接部13d與主體 16之間。因爲此窄寬部13c係爲一在軟焊期間被變形之部 分且此被變形部分之寬度被成形爲小寬度者，故將可減小 在接受軟焊之突出部13中所發生之殘餘應力。一回復力施 加在使突出部13與中間接地連接終端17a分離之方向。因 1375367 此，當此殘餘應力大時，突出部13在某些情況下可能自中 間接地連接終端17a分離。因此，藉由提供具有比終端連 接部13d之寬度更狹窄之寬度的窄寬部13c，將可避免突 出部1 3在軟焊後之初始狀態下便立即與中間接地連接終 端17a分離，或避免由於殘餘應力突出部13在包裝後發生 振動時自中間接地連接終端17a分離。 窄寬部13c之寬度被決定成可確保具有某一程度之強 度，藉此使突出部13不會斷掉，且窄寬部13c之寬度較佳 地被決定成可盡量地將殘餘應力減至最小。因此，較佳地， 窄寬部13c之寬度係等於或大於突出部13之板厚且等於或 小於終端連接部13d之寬度的5/6«更佳地，窄寬部13c 之寬度係不大於終端連接部13d之寬度的2/3且不小於終 端連接部13d之寬度的1/4»在此實施例中，例如終端連接 部13d之寬度係0.37mm，而窄寬部13c之寬度係0.18 mm。 突出部13之板厚係0.08 mm。 軟焊料亦被附著於突出部13之諸側面（板厚）13b。 因此’突出部13之外圍被固定至諸連接終端17，以便可 在平面視圖中被導電地連接。接地棒14藉由衝壓一板狀構 件（例如一被鍍以銀或金之銅板）而進行模製（即所謂之 預鍍）。但在此一情形中，僅接地棒14之上及下表面被電 鍍。考慮到軟焊料亦供給在突出部13之諸側面13b上，較 佳地，亦電鍍諸側面1 3b以便改善軟焊料潤濕性。因此， 較佳地，在板狀構件被一衝模衝壓之後，接地棒14被浸沒 在一電鍍溶液中以便進行電鍍。 當連接構件11並非一電路板而係一連接器時，接地棒 -10- 1375367 14之一表面被覆蓋以一金屬板製之罩體（未示），其具有一 用於軟焊之υ形截面》此罩體之兩前端被連接至此連接器 之一接地連接部，以便可達成接地棒14之接地。甚至在此 情形下，突出部仍作爲一中間接地部，以便亦可達成接地 電位之穩定。 接著，將說明一種同軸電纜線束10之連接方法。 首先，形成此同軸電纜線束10之所有複數同軸電纜 20及絕緣電纜12係成彼此平行配置並藉一夾具或一膠帶 (未示於圖）而被維持，以便可在此諸複數條同軸電纜20 之諸末端上執行形成入口製程（入口形成製程）》在此入口 形成製程中係運用一使用YAG雷射或C02雷射之雷射處理 設備或類似者。首先，C02雷射之波長或強度被調整且此 C02雷射被發射至複數條同軸電纜20之護套24上，以便 可切割此諸護套24且可抽出並移去此諸護套24之末端。 接著，YAG雷射之波長或強度被調整且此YAG雷射被發射 至外導電體23上，以便可切割複數條同軸電纜20之此諸 外導電體23且可抽出並移去位於諸末端上之諸外導電體 23。隨後，C02雷射之波長或強度被調整且此C02雷射被 發射至複數條同軸電纜20之內絕緣體22上，以便可切割 此諸內絕緣體22且可抽出並移去位於諸末端上之諸內絕 緣體22。 在執行入口形成製程後，所有同軸電纜20之外導電體 23被插置並維持在諸接地棒14及15間。然後，突出部I3 及諸同軸電纜20之芯導電體21在平面視圖（如第1圖） 中係成彼此平行配置，而並不將此諸同軸電纜20配置在接 -11 - 1375367 地棒14之突出部13中。突出部13之高度與諸芯導電體 21之高度可有差異》在此，接地棒14及15各配備有一藉 由在此諸接地棒14及15中之每一者的一表面上軟焊所形 成之軟焊料層。此外，當諸外導電體23被插置在諸接地棒 1 4及1 5間時，諸軟焊料層將面向內側。在此狀態下，加 熱將經由此諸接地棒14及15而被進行。於是，此諸接地 棒14及15之諸軟焊料層被溶化，且所有同軸電纜20之諸 外導電體23被導電地連接至諸接地棒14及15。 以此方式中，同軸電纜線束10(其中諸同軸電纜20 之末端被聚集並整體地形成）將如前所述地被連接至一電 路板，諸如一連接器終端或一FPC。 當同軸電纜線束10被連接至一如電路板之連接構件 11上時，首先，位於諸接地棒14及15之諸末端處之諸末 端接地部18藉由軟焊而被電連接至諸接地終端17c。 隨後，諸芯導電體21與突出部13分別被聚集地軟焊 至諸連接終端17與諸中間接地連接終端17a。如第4圖所 示，一具有電線形狀（例如一具有〇.〇8 mm直徑之環形） 之板狀軟焊料S1被插置在諸同軸電纜20之芯導電體21與 諸連接終端17被彼此連接之複數個部位處，以及在該接地 棒14之突出部13與諸中間接地連接終端17a被彼此連接 之複數個部位處。接著，突出部13之終端連接部13d被配 置成可面對該連接部。一脈衝加熱器之熱晶片9從上側處 被壓抵至諸芯導電體21與突出部13’且接著在將此熱晶 片9壓向諸連接終端17與諸中間接地連接終端17a時被加 熱。因此，熱經由諸芯導電體21與突出部13而被傳遞至 -12- 1375367 板狀軟焊料S1’且然後此板狀軟焊料si被溶化以被收集 於位在此板狀軟焊料S1附近之諸芯導電體21與突出部13 中。隨後，當此板狀軟焊料S1被冷卻時，軟焊料在突出部 1 3之終端連接部1 3d與中間接地連接終端i 7a間或環繞終 • 端連接部13d周圍之板厚部分中變成固體，且突出部13被 • 牢固地固定至中間接地連接終端17a，以便可彼此地被導 電連接。另外，諸芯導電體21藉軟焊牢固地固定至連接終 端而成彼此導電連接。如第4圖所示，突出部13被連接至 φ 該兩個中間接地連接終端17a。突出部13亦可被連接至三 個或更複數個中間接地連接終端17a。 ' 突出部13可位在諸彼此平行地配置之同軸電纜20中 之任何部分處。然而，爲達成中間接地，較佳地，將突出 部13設置在諸彼此平行地配置之同軸電纜20的中央處。 諸中間接地連接終端17a可相同於被連接至此諸同軸電纜 20上之諸連接終端17,且此諸中間接地連接終端17a之平 行間距可爲均一的。 • 在進行聚集軟焊之際，由於加熱與緊壓熱晶片9，將 使突出部13之窄寬部13c變形，以致使突出部13之前端 可與諸中間接地連接終端17a相接觸。在聚集軟焊之後， 此經變形之形狀將被維持。藉由使此經變形之形狀具有小 的寬度，如前所述地’在此聚集軟焊後’於突出部丨3中所 產生之殘餘應力，相較於相關先前技藝範例中所產生者將 變爲較小。因此，將可使突出部1 3得以避免與諸中間接地 連接終端17a相分離。 爲檢查在此突出部之形狀與連接強度之間的關係’下 -13- 1375367 表顯示藉由檢視一種在其中窄寬部13c被形成於終端連接 部13d與主體16之間的情況（參見第1圖）及一種在並無 窄寬部之情況（參見第6圖）所獲得之結果。此外，各範 例數目係1 5個。 經測量之連接強度如下。亦即，突出部被軟焊至連接 器之中間接地連接終端，且此連接器被固定成可在25 m/m in之速度下以90度角升高該接地棒。在此突出部自諸 中間接地連接終端分離時所獲得之力被稱之爲連接強度》 [表1〕 具有窄寬部（實施例） 沒有窄寬部（比較範例） 最大値（gf) 103.0 18.0 最小値（gf) 58.0 4.0 平均値（gf) 84.3 10.1 可以確認的是，此連接強度在具有窄寬部之情況（實 施例）中相較於其在沒有窄寬部之情況（比較範例）中係 明顯地經改良了。因此，根據本發明之實施例，將可確保 接地棒之突出部得有一穩定之接地狀態，甚至當此突出部 藉由聚集地軟焊而被連接以及同時緊壓而彎曲突出部時亦 是如此。 此接地棒之突出部的形狀可如第5圖所示般地具有僅 被連接至一個中間連接終端部處之寬度。 第5圖中所示之突出部13C具有窄寬部13c，且具有 —形狀，即此形狀具有比窄寬部13c之寬度更大之寬度的 終端接部13d僅被連接至一個連接終端17處。當連接終端 17之平行間距係1 mm時，此連接終端17之寬度係大約 -14- 1375367 〇·5 mm。因此，在該突出部13C之範例中，窄寬部丨3(；之 寬度可被設定成大約0.15 mm，且終端接部i3d之寬度可 被設定成大約0.25 mm » 【圖式簡單說明】 第1圖係一平面圖，其揭示一根據本發明實施例之同 軸電纜線束之連接構造的範例。 第2圖係一剖面圖，其揭示一用於第1圖所示之同軸 電纜線束之同軸電纜。 第3圖係一剖面圖，其揭示第1圖所示之同軸電纜線 束。 第4圖係一剖面圖，其揭示同軸電纜線束係藉由聚集 體軟焊而被連接之範例。 第5圖係一平面圖，其揭示一被連接至一連接終端處 之突出部。 第6圖係一平面圖，其揭示根據一比較性範例所實施 之同軸電纜線束之連接構造。 第7圖係一平面圖，其揭示一習知同軸電纜線束之連 接構造。 第8圖係一剖面圖，其揭示第7圖所示之同軸電纜線 束之連接構造。 【主要元件符號說明】 9 熱晶片 10 同軸電纜線束 11 連接構件 -15- 1375367 13 13b 13c 1 3 C 13d 14 15 16BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure of a coaxial cable harness in which a wire harness connects a plurality of coaxial cables arranged in parallel with each other to a plurality of connection terminals. [Prior Art] In recent years, an extremely thin coaxial cable has been used to connect a device body to a liquid crystal display or to a wire in a device such as a notebook computer, a mobile phone, or a small-sized camera. A coaxial cable harness having a wire harness shape in which a plurality of coaxial cables are gathered and integrated with each other is used for wiring convenience (see Patent Document 1). Each of the coaxial cables used in the coaxial cable harness is constructed such that a core conductor, an inner insulator, an outer conductor, and a sheath are sequentially disposed from the inner side in a coaxial shape. These plurality of coaxial cables are gathered and integrated with each other to form a coaxial cable harness. One end of the coaxial cable harness is connected and fixed to a plurality of connector terminals configured at a predetermined pitch, or is connected and fixed to a circuit board by a conductive connection such as soldering. An example of a technique associated with a coaxial cable harness is shown in Figures 7 and 8. Figures 7 and 8 show a pattern of one end of a coaxial cable harness 1. In this coaxial cable harness 1, a plurality of coaxial cables 2 and insulated cables 3 are arranged in parallel with each other. The outer conductors 2a and the plurality of strips of the coaxial cable 2, the core conductors 3a of the edge cable 3 are electrically connected to the common ground rods 4 and 5»the plurality of end grounding portions 4a are disposed at the common joints 1375367 The two ends of the ground rods 4 and 5 are electrically connected to a connection portion for grounding. Among the portions different from the end land portions 4a of the ground bar 4, a plurality of intermediate land portions composed of a plurality of ground pins 6 are provided between the ground bar 4 and the core conductors 3a of the insulated cables 3. Each of the ground pins 6 is electrically connected to each of the core conductors 3a and the ground bars 4. Further, each of the ground pins 6 is electrically connected to each of a plurality of connection terminals 8 which are disposed on a connecting member 7, such as a circuit board or a connector, by soldering. . With this configuration, the position of the connecting member 7 is fixed at both ends of the grounding bar 4 (end grounding portion 4a) to achieve grounding, and this grounding can also be at the intermediate ground portion of the grounding bar 4 (the grounding pins 6) Completed at the same time. [Patent Document 1] JP-A-2007-280772 Prior to soldering, the intermediate land portions have a shape extending in a straight line on the same plane as the body of the ground rod. However, at the time of performing this soldering, The intermediate ground portions are pressed into an arc such that the leading ends of the intermediate ground portions can be connected to the connection terminals (see Fig. 7). Therefore, after being connected to the connection terminals, the residual stress due to the curved shape exists inside the intermediate land portions. When this residual stress is large, the intermediate ground portions may be separated from the connection terminals immediately after soldering. In addition to this, when vibration occurs after packaging, the intermediate ground portions may be separated from the connection terminals due to the residual stress. When this problem occurs, the grounding performance at the central portion of the ground rod becomes unstable, and thus the noise canceling effect may not be sufficiently exerted. SUMMARY OF THE INVENTION The present invention provides a connection structure of a coaxial cable harness, which can ensure a stable grounding state of a ground bar of 1375367, and at the same time achieve a stable conductive connection between the core conductor of the coaxial cable 9 and the connection terminal. According to a first aspect of the present invention, in a connection structure of a coaxial cable harness, a wire harness and a plurality of terminals are connected, wherein the plurality of coaxial cables are disposed in parallel with each other, and each of the plurality of coaxial cables Each of the packages includes a core conductor, an inner insulator disposed to surround the periphery of the core conductor, an outer conductor disposed to surround the periphery of the inner insulator, and a periphery configured to surround the outer conductor Sheath. The plurality of coaxial electrical wires are electrically connected to a common ground bar. The ground bar includes a body and a protrusion extending toward the plurality of coaxial cable configurations _, and the protrusions project from the body at a different portion from the ends of the body. The projection has a terminal connection portion and a narrow width portion, and the narrow portion has a width narrower than the width of the terminal connection portion and is formed between the terminal connection portion of the ground rod and the main body. A plurality of connection terminals are arranged in parallel with each other, and an intermediate ground connection terminal is arranged in parallel with the connection terminals. The core conductors are electrically connected to the connection terminals by soldering at the ends of the coaxial cables, and the terminal connections of the ground bars are electrically connected to the intermediate ground connection terminals. According to the second aspect of the invention, the width of the narrow portion may be not more than 5/6 of the width of the terminal connecting portion and not less than 1/4 of the width of the terminal connecting portion. According to the third aspect of the invention, the ground rod can be plated after being stamped and formed by a die. Other aspects and advantages of the invention will be apparent from the description, drawings and claims. [Embodiment] 1375367 Hereinafter, a connection structure of a coaxial cable harness will be described with reference to the drawings according to an embodiment of the present invention. Furthermore, the connection configuration of the coaxial cable harness implemented in accordance with the present invention can be implemented in a variety of different forms, wherein for example a connector is attached to both ends of the coaxial cable harness, or a connector is only attached to One end of the coaxial cable harness and a circuit board attached to the other end of the coaxial cable harness. A connection structure on one end side of the coaxial cable harness and a connection method of the coaxial cable harness will be described hereinafter. Fig. 1 is a plan view showing a connection structure of a coaxial cable harness according to an embodiment of the present invention. Fig. 2 is a cross-sectional view showing a coaxial cable used in the coaxial cable harness shown in Fig. 1. Figure 3 is a cross-sectional view taken along line A-A in Figure 1. As shown in Fig. 1, a coaxial cable harness 1 has a connection structure in which a plurality of coaxial cables 20 of the same type and the same size (e.g., 34 coaxial cables) are arranged in parallel with each other. The outer conductors 23 of the coaxial cables 20 are electrically connected to a common ground bar 14 in the axial direction of both ends of the coaxial cables 20. The core conductors 21 and the ground bars 14 of the coaxial cables 20 are electrically connected to a plurality of connection terminals 17 and intermediate ground connection terminals 17a arranged in parallel with each other by soldering, respectively. In addition, the connection terminals 17 and the intermediate ground connection terminals l*7a are disposed in parallel with each other at a predetermined pitch (for example, 0.3 mm) on a connecting member 11, and the connecting member is a connector or a circuit board. . As shown in Fig. 2, each of the coaxial cables 20 has a structure in which a core conductor 21, an inner insulator 22, an outer conductor 23, and an insulating sheath 1375367 24 which are coaxially arranged are formed. The inner insulator 22 is configured to surround the periphery of the core guide 21. The outer conductor 23 is configured to surround the inner insulator 22. The insulating sheath 24 is configured to surround the periphery of the outer conductor 23, for example, an AWG 42 cable conforming to the American Gage standard, or a coaxial cable 20 having a finer power than the AWG 42. In this AWG 42 coaxial cable 20, the core guide 21 is formed by, for example, seven copper alloy wires 21a which are plated with silver and have a thickness of 0.025 mm. The inner insulator 22 is composed of a fluororesin (e.g., PFA) coated on the outer peripheral surface of the core guide 21 to have an outer diameter of mm. The outer conductor 23 is formed by, for example, spirally winding a plurality of copper alloy wires 23a plated with silver and having an outer diameter of mm around the surface of the inner insulator 22 to have a size of 0.23 mm. It is composed of fluorine (for example, PFA) coated on the outer peripheral surface of the outer conductor 23. In the case of AWG 42, the sheath 24 has a diameter of 0.3 1 m. As shown in Figs. 1 and 3, the end of each coaxial cable 20 is subjected to an inlet forming process. The core conductor 21, the inner insulator 22, and the body 23 are sequentially exposed from the front end of each of the coaxial cables 20 by a length. In this coaxial cable harness 10, all of the coaxial cables are arranged in parallel with each other, and the outer conductors 23 are interposed between the two; the ground rods 14 and 15 are electrically connected to each other by soldering. Sticks 14 and 15. In addition, the coaxial cable harness 10 can have a plurality of insulated cables including a core conductor and a jacket different from the coaxial cable 20. The grounding bars 14 and 15 are formed as a body having a certain thickness. The wire is used as the outer diameter of the electric wire. 0.17 Peripheral 0.03 1. The protective resin is electrically connected to the predetermined 20-series grounding package: 1375367, which has a length that can be in contact with the outer conductors 23 of all the coaxial cables 20, and the sheaths of the coaxial cables 20 are connected to each other. They are in contact with each other or are arranged in parallel at a predetermined interval. For example, the ground rods 14 and 15 are formed by stamping a conductive metal plate (such as a copper plate). The ground rod 15 is disposed closer to the connecting member 11 and has a thin rectangular shape. The coaxial cables 20 extend in parallel directions. The ground rod 14 is disposed away from the connecting member 11 and includes a body 16 and a projection 13. The body 16 has a thin rectangular shape extending in the parallel direction of the coaxial cables 20 φ. This projection 13 extends from the main body 16 at a portion different from the end ground portion 18 disposed at both ends of the main body 16 in the axial direction of the coaxial cable 20'. The grounding bars 14 and 15 have common end grounding portions 18 which are electrically connected to the ground terminals 17c of the connecting member 11 by soldering at both ends in the parallel direction of the coaxial cables 20. The protruding portion 13 of the grounding bar 14 can be regarded as an intermediate grounding portion of the grounding bar Η# by electrically connecting in a soldering manner or a plurality of intermediate grounding connection terminals 17a. According to this embodiment, the projection 13 is integrally formed with the body 16 of the ground rod 14. In the protruding portion 13 of the grounding bar, a narrow portion 13c having a width narrower than the width of a terminal connecting portion 13d is formed at the terminal connecting portion 13d and the body electrically connected to the intermediate ground connecting terminal 17a. Between 16. Since the narrow portion 13c is a portion that is deformed during soldering and the width of the deformed portion is formed into a small width, the residual stress occurring in the soldered portion 13 can be reduced. . A restoring force is applied in a direction separating the projection 13 from the intermediate ground connection terminal 17a. As a result of 1375367, when this residual stress is large, the projection 13 may be separated from the intermediate ground connection terminal 17a in some cases. Therefore, by providing the narrow portion 13c having a narrower width than the width of the terminal connecting portion 13d, it is possible to prevent the protruding portion 13 from being immediately separated from the intermediate ground connecting terminal 17a in the initial state after soldering, or to avoid Since the residual stress protrusion 13 is vibrated after packaging, it is separated from the intermediate ground connection terminal 17a. The width of the narrow portion 13c is determined to ensure a certain degree of strength, whereby the projection 13 is not broken, and the width of the narrow portion 13c is preferably determined to minimize residual stress as much as possible. The smallest. Therefore, preferably, the width of the narrow portion 13c is equal to or larger than the thickness of the protrusion 13 and equal to or smaller than 5/6 of the width of the terminal connecting portion 13d. More preferably, the width of the narrow portion 13c is not more than 2/3 of the width of the terminal connecting portion 13d and not less than 1/4 of the width of the terminal connecting portion 13d. In this embodiment, for example, the width of the terminal connecting portion 13d is 0.37 mm, and the width of the narrow portion 13c is 0.18. Mm. The thickness of the projection 13 is 0.08 mm. The soft solder is also attached to the side faces (sheet thickness) 13b of the protruding portion 13. Therefore, the periphery of the projection 13 is fixed to the connection terminals 17 so as to be electrically connected in plan view. The ground rod 14 is molded by stamping a plate member (e.g., a copper plate plated with silver or gold) (so-called pre-plating). In this case, however, only the upper and lower surfaces of the ground rod 14 are electroplated. In view of the fact that the soft solder is also supplied to the side faces 13b of the projections 13, it is preferable to plate the side faces 13b to improve the solder wettability. Therefore, preferably, after the plate member is punched by a die, the ground bar 14 is immersed in a plating solution for electroplating. When the connecting member 11 is not a circuit board and is a connector, one surface of the grounding bar-10-1375367 14 is covered with a metal plate cover (not shown) having a dome shape for soldering. The two front ends of the cover are connected to one of the grounding connections of the connector so that the grounding of the grounding bar 14 can be achieved. Even in this case, the protruding portion functions as an intermediate ground portion so that the ground potential can be stabilized. Next, a method of connecting the coaxial cable harness 10 will be described. First, all of the plurality of coaxial cables 20 and the insulated cables 12 forming the coaxial cable harness 10 are arranged in parallel with each other and are maintained by a jig or a tape (not shown) so that the plurality of coaxial cables 20 can be here. The formation of an inlet process (inlet forming process) is performed at the ends of the inlet. In this inlet forming process, a laser processing apparatus using a YAG laser or a C02 laser or the like is used. First, the wavelength or intensity of the C02 laser is adjusted and the CO2 laser is fired onto the jacket 24 of the plurality of coaxial cables 20 so that the jackets 24 can be cut and the jackets 24 can be withdrawn and removed. End. Then, the wavelength or intensity of the YAG laser is adjusted and the YAG laser is emitted onto the outer conductor 23 so that the outer conductors 23 of the plurality of coaxial cables 20 can be cut and can be extracted and removed at the ends. Outer conductors 23. Subsequently, the wavelength or intensity of the C02 laser is adjusted and the CO2 laser is emitted onto the inner insulator 22 of the plurality of coaxial cables 20 so that the inner insulators 22 can be cut and the ends located at the ends can be extracted and removed. Inner insulator 22. After the inlet forming process is performed, all of the conductors 23 outside the coaxial cable 20 are interposed and maintained between the ground bars 14 and 15. Then, the protruding portion I3 and the core conductors 21 of the coaxial cables 20 are arranged in parallel with each other in a plan view (as shown in FIG. 1), and the coaxial cables 20 are not disposed on the ground bar 14-1375367. In the protrusion 13 . The height of the protruding portion 13 may be different from the height of the core conductors 21. Here, the grounding bars 14 and 15 are each provided with a soldering station on a surface of each of the grounding bars 14 and 15 A soft solder layer is formed. Further, when the outer conductors 23 are interposed between the ground rods 14 and 15, the soft solder layers will face inward. In this state, heating will be performed via the ground rods 14 and 15. Thus, the soft solder layers of the ground bars 14 and 15 are melted, and the outer conductors 23 of all the coaxial cables 20 are electrically connected to the ground bars 14 and 15. In this manner, the coaxial cable harness 10 (where the ends of the coaxial cables 20 are gathered and integrally formed) will be connected to a circuit board, such as a connector terminal or an FPC, as previously described. When the coaxial cable harness 10 is connected to a connecting member 11 such as a circuit board, first, the terminal ground portions 18 at the ends of the ground bars 14 and 15 are electrically connected to the ground terminals by soldering. 17c. Subsequently, the core conductors 21 and the projections 13 are collectively soldered to the connection terminals 17 and the intermediate ground connection terminals 17a, respectively. As shown in Fig. 4, a plate-like solder S1 having a wire shape (e.g., a ring having a diameter of 〇. 〇 8 mm) is interposed in the core conductor 21 of the coaxial cable 20 and the connection terminals 17 are connected to each other. A plurality of locations of the connection, and a plurality of locations where the protruding portion 13 of the ground bar 14 and the intermediate ground connection terminals 17a are connected to each other. Next, the terminal connecting portion 13d of the protruding portion 13 is configured to face the connecting portion. The thermal wafer 9 of a pulse heater is pressed from the upper side to the core conductors 21 and the projections 13' and then heated while pressing the thermal wafer 9 toward the connection terminals 17 and the intermediate ground connection terminals 17a. Therefore, heat is transferred to the -12-1375367 plate-shaped soft solder S1' via the core conductors 21 and the projections 13, and then the plate-shaped solders si are melted to be collected in the vicinity of the plate-shaped solder S1. The core conductors 21 and the protrusions 13 are included. Subsequently, when the plate-like soft solder S1 is cooled, the soft solder becomes solid in the plate thickness portion around the terminal connection portion 13d of the projection 13 and the intermediate ground connection terminal i7a or around the terminal connection portion 13d. And the projections 13 are securely fixed to the intermediate ground connection terminal 17a so as to be electrically connected to each other. Further, the core conductors 21 are firmly fixed to the connection terminals by soldering to be electrically connected to each other. As shown in Fig. 4, the projection 13 is connected to φ the two intermediate ground connection terminals 17a. The projections 13 can also be connected to three or more intermediate ground connection terminals 17a. The projection 13 can be located at any portion of the coaxial cable 20 that is disposed in parallel with each other. However, in order to achieve intermediate grounding, it is preferable to arrange the protruding portion 13 at the center of the coaxial cable 20 which is disposed in parallel with each other. The intermediate ground connection terminals 17a may be identical to the connection terminals 17 connected to the coaxial cables 20, and the intermediate ground connection terminals 17a may have a uniform pitch. • At the time of the gathering soldering, since the heat chip 9 is heated and pressed, the narrow portion 13c of the projection 13 is deformed so that the front end of the projection 13 can come into contact with the intermediate ground connection terminals 17a. This deformed shape will be maintained after the gathering is soldered. By having this deformed shape with a small width, the residual stress generated in the projecting portion 3 after the "gathering after soldering" as described above will be compared with those produced in the related prior art examples. Become smaller. Therefore, the projections 13 will be made to avoid separation from the intermediate ground connection terminals 17a. In order to check the relationship between the shape of the projection and the strength of the connection, the following is shown in the following paragraph - 1335367. By showing a case in which the narrow portion 13c is formed between the terminal connecting portion 13d and the main body 16 (see the 1) and a result obtained without a narrow width (see Figure 6). In addition, the number of instances is 15. The measured joint strength is as follows. That is, the projection is soldered to the intermediate ground connection terminal of the connector, and the connector is fixed to raise the ground rod at a 90 degree angle at a speed of 25 m/m in. The force obtained when the projection is separated from the intermediate ground connection terminals is called the connection strength" [Table 1] has a narrow width (embodiment) No narrow width (comparative example) Maximum 値 (gf) 103.0 18.0 Minimum 値(gf) 58.0 4.0 Average 値(gf) 84.3 10.1 It can be confirmed that this connection strength is in the case of having a narrow width (Example) compared to the case where there is no narrow width (Comparative example) The system has been significantly improved. Therefore, according to an embodiment of the present invention, it is possible to ensure that the protruding portion of the grounding rod has a stable grounding state, even when the protruding portion is connected by the fusion welding, and the bending portion is simultaneously pressed and pressed. . The shape of the projection of the ground rod may have a width which is only connected to one intermediate connection terminal portion as shown in Fig. 5. The projection 13C shown in Fig. 5 has a narrow portion 13c and has a shape in which the terminal portion 13d having a width larger than the width of the narrow portion 13c is connected only to one connection terminal 17. . When the parallel pitch of the connection terminals 17 is 1 mm, the width of the connection terminal 17 is approximately -14 - 1375367 〇 · 5 mm. Therefore, in the example of the protruding portion 13C, the width of the narrow portion 丨3 (; can be set to about 0.15 mm, and the width of the terminal portion i3d can be set to about 0.25 mm) [Simple description of the drawing] 1 is a plan view showing an example of a connection structure of a coaxial cable harness according to an embodiment of the present invention. Fig. 2 is a cross-sectional view showing a coaxial cable for a coaxial cable harness shown in Fig. 1. Fig. 3 is a cross-sectional view showing the coaxial cable harness shown in Fig. 1. Fig. 4 is a cross-sectional view showing an example in which the coaxial cable harness is connected by soldering of the aggregate. A plan view showing a projection connected to a connection terminal. Fig. 6 is a plan view showing a connection structure of a coaxial cable harness implemented according to a comparative example. Fig. 7 is a plan view showing A conventional coaxial cable harness connection structure. Fig. 8 is a cross-sectional view showing the connection structure of the coaxial cable harness shown in Fig. 7. [Main component symbol description] 9 Thermal wafer 10 Coaxial cable harness 11 Connecting member -15- 1375367 13 13b 13c 1 3 C 13d 14 15 16
17a 17c 18 2 0 2 1 2217a 17c 18 2 0 2 1 22
23 2 4 突出部 側面 窄寬部 突出部 終端連接部 接地棒 接地棒 主體 連接終端 中間接地連接終端 接地終端 末端接地部分 同軸電纜 芯導電體 內絕緣體 外導電體 絕緣護套23 2 4 Projection Side Side Narrow and wide section Projection part Terminal connection part Grounding rod Grounding rod Main body Connection terminal Intermediate ground connection terminal Ground terminal End grounding part Coaxial cable Core conductor Inner insulator External conductor Insulation sheath
SI 軟焊料SI soft solder