US 11,921,407 B2
Fixing device, projection optical device, and projector
Naoto Takehana, Azumino (JP); Hirofumi Okubo, Matsumoto (JP); and Kosho Kamijo, Yamagata-mura (JP)
Assigned to SEIKO EPSON CORPORATION, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Jan. 20, 2022, as Appl. No. 17/579,706.
Claims priority of application No. 2021-006964 (JP), filed on Jan. 20, 2021.
Prior Publication US 2022/0229351 A1, Jul. 21, 2022
Int. Cl. G03B 21/14 (2006.01); G02B 7/02 (2021.01); G02B 27/62 (2006.01)
CPC G03B 21/142 (2013.01) [G02B 7/023 (2013.01); G02B 27/62 (2013.01); G03B 21/145 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A fixing device that fixes, to a light emitting device that emits light, a lens barrel included in a projection optical device and holding a plurality of lenses, the fixing device comprising:
a first tube member;
a contact section provided on an outer side of the first tube member and in contact with a holding section included in the light emitting device;
a pressing mechanism provided to be opposed to the contact section and configured to press the holding section toward the contact section when the fixing device is attached to the light emitting device; wherein the pressing mechanism includes:
a pressing section configured to come into contact with the holding section, the pressing section includes:
a pressing surface provided in a position opposed to the contact section and configured to press the holding section;
a guide surface adjacent to the pressing surface in a circumferential direction centering on a center axis of the first tube member and provided continuously to the pressing surface and configured to guide the holding section to the pressing surface; and
the guide surface is inclined with respect to the circumferential direction to further separate from the contact section as being further apart from the pressing surface; and
an urging section configured to urge the pressing section to a contact section side.