Patent ID: 7012361

Claim:
A fluorescent display device comprising: an envelope of which an inner space is in a vacuum state, the envelope having therein a plurality of filament-shaped cathodes supported by a pair of cathode supports; and anodes, each having a fluorescent material, fluorescent materials of the anodes radiating light by impaction of electrons emitted from the cathodes; wherein each of the cathode supports includes a base fixed to the envelope; one or more anchors, each having an arm serving as a resilient member for applying tension to a cathode connected thereto and a tab connected to one end of the cathode, the arm having a distal end portion and a proximal end portion, the proximal end portion being connected to the base and the tab being disposed at the distal end portion; and a support member separated from the arm of its adjacent anchor and having a base portion and a tab portion, the base portion being connected to the base and bent upright and the tab portion being extended from the base portion and supporting one end of another cathode, wherein the support member and the anchors are connected via the base, and wherein the arm of each anchors is slanted with respect to a lengthwise direction of the cathode, and the base portion of the support member is disposed normal to the lengthwise direction of the cathode.