US 11,698,576 B2
Projection device having rotation lock mechanism and projection lens having rotation lock mechanism
Hitoshi Shimizu, Saitama (JP); Yasuyuki Miyata, Saitama (JP); and Yasuto Kuroda, Saitama (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Mar. 19, 2021, as Appl. No. 17/206,228.
Application 17/206,228 is a continuation of application No. PCT/JP2019/037101, filed on Sep. 20, 2019.
Claims priority of application No. 2018-178126 (JP), filed on Sep. 21, 2018.
Prior Publication US 2021/0208490 A1, Jul. 8, 2021
Int. Cl. G03B 21/14 (2006.01); G03B 21/16 (2006.01)
CPC G03B 21/16 (2013.01) [G03B 21/142 (2013.01); G03B 21/145 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A projection device comprising:
an electro-optical element;
a drive housing that stores the electro-optical element and includes a central portion and a protruding portion protruding from the central portion;
a recessed portion;
a projection lens that is disposed in the recessed portion, projects light applied from the electro-optical element onto a projection target, and includes a first rotation mechanism;
a first lock unit that is provided on the projection lens and switches a state of the first rotation mechanism between rotatable and not rotatable; and
fans that are disposed in the drive housing and draw in or discharge gas, wherein
the recessed portion and the protruding portion are adjacent to each other in a first direction,
the projection lens is provided so as to extend to the recessed portion from the drive housing in a second direction crossing the first direction,
the central portion includes a first A side surface that is provided in a first A direction corresponding to one side in the first direction and a second A side surface that is provided in a first B direction corresponding to the other side in the first direction,
the protruding portion includes a first B side surface in the first A direction and includes a second B side surface, which faces the projection lens, in the first B direction,
the fans face the second A side surface and the second B side surface, and
at least one of the fans, the projection lens and the second B side surface overlap along an x axis, the x axis being normal to the second B side surface.