PROJECTOR - LIGHT BOY CO LTD

Title:

PROJECTOR

Document Type and Number:

WIPO Patent Application WO/2005/068901

Kind Code:

A1

Abstract:

A projector (1) enabling the extension/retraction of a column even when the column is rotated, comprising the extendable column (4) installed on a carrier (6) as a base, a lifting device (21) installed in the column (4), a lighting apparatus (2) installed at the tip of the column (4), and a power supply (5) for supplying power to the lighting apparatus (2). The column (4) is formed of circular tubes and rotated in conjunction with the lifting device (21). Also, the column (4) is formed by loosely fitting, to each other, a first column (13) fixed to the carrier (6) and second and third columns (4a) and (4b) having outer diameters reduced in that order less than that of the first column (13). The second and third columns (4a) and (4b) are loosely fitted to each other so as to be moved in the vertical direction and rotated in conjunction with each other.

Inventors:

YOSHIMORI NORIHITO (JP)
TAGUCHI MASAYUKI (JP)

Application Number:

PCT/JP2005/000382

Publication Date:

July 28, 2005

Filing Date:

January 14, 2005

Export Citation:

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Assignee:

LIGHT BOY CO LTD (JP)
YOSHIMORI NORIHITO (JP)
TAGUCHI MASAYUKI (JP)

International Classes:

F21V21/22; F21V21/34; F21V21/36; F21W131/10; (IPC1-7): F21V21/22; F21V3/02; F21V21/26; F21S2/00; F21S6/00

Foreign References:

JPH10172337A	1998-06-26
JP2002025330A	2002-01-25
JPH0637033U	1994-05-17
JPH07331926A	1995-12-19
JP2003036709A	2003-02-07
JPS5813122U	1983-01-27
JPH0650682U	1994-07-12
JP3096916U	2004-01-08
JPS5780112U	1982-05-18
JPH02197008A	1990-08-03

Other References: