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1. (WO2018010235) FOCUSING DEVICE FOR PROJECTION LENS

Pub. No.:    WO/2018/010235    International Application No.:    PCT/CN2016/093427
Publication Date: Fri Jan 19 00:59:59 CET 2018 International Filing Date: Sat Aug 06 01:59:59 CEST 2016
IPC: G03B 21/14
G02B 7/10
G02B 7/04
Applicants: IVIEW DISPLAYS (SHENZHEN) COMPANY LTD.
广景视睿科技(深圳)有限公司
Inventors: ZHIQIANG, Gao
高志强
YUAN, Zhao
赵远
LIANG, Mei
梅良
QINGYUN, Lin
林清云
Title: FOCUSING DEVICE FOR PROJECTION LENS
Abstract:
Disclosed is a focusing device for a projection lens, comprising: a front lens group barrel (10), a rear lens group barrel (20), an outer sleeve (30) with a flange, an adjustment slider (40), an adjustment deflector rod (50), limiting posts (60) and guide posts (70). The front lens group barrel is provided with a first limiting surface (S1); the rear lens group barrel is provided with a movable groove (21), and a first limiting hole (23) and a first guide post hole (22); and the outer sleeve is provided with a slant annular groove (31), a second limiting hole (33), a second guide post hole (32), and a second limiting surface (S2). The focusing device for a projection lens has a simple focusing structure, makes focusing easy and quick, can achieve changes in the relative position of a front lens group and a rear lens group, has a better resolution of scenes at different positions, is more stable, and can quickly and accurately adjust the focal length to achieve desired projection effects.