Patent ID: 7995321

Claim:
An ionization device comprising: a plurality of needle electrodes, each of the needle electrodes emitting ions charged either positively or negatively from a tip end thereof by applying a high voltage thereto; an electrical circuit unit for applying high voltage to the needle electrodes; casing members formed in an elongated unit, each of said casing members including a high voltage plate for receiving a power supply from the electrical circuit unit, and being attachable with the plurality of the needle electrodes and spaced from each other, the casing members applying the high voltage supplied from the electrical circuit unit via the high voltage plate to the respective needle electrodes; a coupling member for mechanically coupling adjacent casing members in a longitudinal direction and electrically connecting the high voltage plates of the respective casing members; and an elongated main body casing for housing the plurality of casing members with the coupling member and the electrical circuit unit, the main body casing having the needle electrodes spaced from each other in the longitudinal direction and protruding outside thereof, wherein the main body casing integrally forms a space for arranging the casing members so as to be separated from a space for arranging the electrical circuit unit, and wherein said coupling member includes a power supply joint for separately supplying the high voltage generated by the electrical circuit unit to the high voltage plate included in the casing member at a middle portion of the main body casing other than through the other casing members.