Lens body tube and projector having the same

Details Lens body tube and projector having the same Lens body tube and projector having the same

2008-04-30

2009-02-03

Thompson, Timothy J (Department: 2873)

Optical: systems and elements

Lens

With support

C359S822000, C359S823000

Reexamination Certificate

active

07486453

ABSTRACT:
A lens body tube comprising: a projection lens; a rotary cam tube that moves a variable power lens within the projection lens in an optical axis direction in accordance with a rotation of the rotary cam tube; a supporting tube, provided at an outside of the rotary cam tube, that rotatably supports the rotary cam tube; a zooming tube, rotatably provided at an outside of the supporting tube, that rotatably supports the supporting tube and rotates the rotary cam tube in accordance with a rotation of the zooming tube; a cam gear provided at an outer peripheral surface of the rotary cam tube; a zoom gear provided at an inner peripheral surface of the zooming tube; a relay gear that is rotatably provided between the rotary cam tube and the zooming tube, and meshes with the cam gear and the zoom gear to transmit a rotation movement of the zooming tube to the rotary cam tube; an insertion hole which is formed at the supporting tube and in which the relay gear is inserted; and a supporting portion, provided at the supporting tube, that rotatably supports the relay gear.

REFERENCES:
patent: 2005/0018319 (2005-01-01), Yano
patent: 2003-66316 (2003-03-01), None

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