PROBLEM TO BE SOLVED: To eliminate the break of a signal cable by positioning the signal cable at a position without an interference with other built-in objects in an insertion portion.SOLUTION: The distal end of a reinforcing frame 59 is fixed to a prism holding member 54 and the rear end is fixed to the jacket of the signal cable 25. A prism 53 and a sub-board 58 are incorporated in the reinforcing frame 59 and fixed by a seal resin 60 by filling an adhesive. A joint piece 75 extended from the rear end of the reinforcing frame 59 is fixed to the jacket of the signal cable 25 by the use of a spool and the adhesive. A narrowing portion 71 is formed in the reinforcing frame 59. The narrowing portion 71 is formed by narrowing to make the cross-sectional area of a traverse plane which is orthogonal to a gutter direction, be gradually reduced toward a rear part. The optical axis of a lens barrel 52 and the center axis of the signal cable 25 are off-set by the narrowing portion 71. The signal cable 25 is positioned at a position without the interference with other built-in objects by the off-set function of the narrowing portion 71.COPYRIGHT: (C)2013,JPO&INPIT【課題】挿入部内で信号ケーブルを他の内蔵物に干渉することの無い位置に位置決めし、信号ケーブルの破断を無くする。【解決手段】補強枠59の先端をプリズム保持部材54に、後端を信号ケーブル25の外皮に固定する。プリズム53及びサブ基板58を補強枠59に内蔵させて、接着剤の充填による封止樹脂60で固着する。信号ケーブル25の外皮に、補強枠59の後端から延設した接合片75を糸巻及び接着剤で固定する。補強枠59に絞り部71を形成する。絞り部71を、後方に向かうに従い樋方向に直交する横断面の断面積が次第に小さくなるように絞って形成する。絞り部71により、レンズ鏡筒52の光軸と信号ケーブル25の中心軸とをオフセットする。絞り部71のオフセット機能により信号ケーブル25を、他の内蔵物に干渉することが無い位置に位置決めする。【選択図】図2
