Patent ID: 6057775
Filing Date: 2000-05-02
Classification: G08B

Abstract:
An ionization smoke detector comprising:an inner electrode;an intermediate electrode having an electrode body and an electrode piece extending from the electrode body, facing the inner electrode and connected to a field effect transistor;an outer electrode provided in an opposite side to the inner electrode with respect to the intermediate electrode; andan insulating supporter for supporting the intermediate electrode to face the inner electrode; whereinthe supporter comprises an electrode supporting portion for supporting the intermediate electrode, having a cylindrical peripheral wall to enclose the electrode body of the intermediate electrode, a container for containing the field effect transistor, and a container supporting member for supporting the container by connecting it to the electrode supporting portion;a first notch portion for extending the electrode piece of the intermediate electrode out thereof is formed in the cylindrical peripheral wall, and a second notch portion for extending a lead wire of the field effect transistor stored in the container out of the container is formed at a position facing the first notch portion of the peripheral wall; andthe electrode piece extending from the first notch portion is connected to the lead wire extending from the second notch portion.