VEHICLE ANTITHEFT DEVICE

PROBLEM TO BE SOLVED: To provide a vehicle antitheft device that is made both low in cost and small in size.SOLUTION: A vehicle antitheft device for communicating with a portable device mounted on a vehicle by radio has a printed board on which a pattern antenna and an electronic component are mounted housed in an enclosure made of dielectric, and a holding portion for holding the printed board in a gap portion provided inside of the pattern antenna arranged along part of the outer edge of the printed board. The enclosure comprises a cover and a base that cover the printed board from its front and back, and is provided with a through hole at the gap portion of the printed board. A rib including a pedestal at the bottom of one of the cover and base is inserted into the through hole, and further when the rib is fitted into a fitting hole formed in the other, the printed board is interposed between the pedestal and the fitting hole and held by the enclosure.SELECTED DRAWING: Figure 1 【課題】低コスト化と小型化を両立させた車両用盗難防止装置を提供する。【解決手段】車両に搭載され携帯機との間で無線通信を行う車両用盗難防止装置であって、パターンアンテナ及び電子部品が搭載されたプリント基板を誘電体からなる筐体に収容し、前記プリント基板の外縁の一部に沿って配置された前記パターンアンテナの内側に設けられた空隙部にプリント基板のための保持部を設けた。前記筐体は、前記プリント基板を表と裏から覆うカバーとベースで構成され、前記プリント基板の前記空隙部に貫通穴を設け、前記カバーとベースの一方の根元に台座を有したリブを前記貫通穴に差し込み、さらに他方に形成された嵌合穴と嵌合させる際に前記台座と前記嵌合穴とで前記プリント基板を挟み込んで筐体に保持する。【選択図】図１