Focusing device and focusing method

• Main Authors: CHEN ZHIWEI, LIU WEI, CAO SHICHAO
• Format: Patent
• Language: Chinese; English
• Published: 09.11.2021
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHOTOGRAPHY; PHYSICS

The invention discloses a focusing device and a focusing method. The focusing device comprises a to-be-focused piece, a clutch limiting piece and a driving fixing device; the to-be-focused piece comprises a first gear used for focusing, the driving fixing device comprises a rear sleeve, a driving structure and a second gear, the rear sleeve is connected with the clutch limiting piece through a limiting assembly, the driving structure is connected with the second gear, the second gear and the first gear are eccentrically arranged, the rear sleeve rotates between a first position and a second position on the clutch limiting piece relative to the clutch limiting piece under the limiting effect of the limiting assembly, the second gear and the first gear are driven to be meshed and separated respectively, and therefore the to-be-focused piece is switched to be subjected to electric focusing and manual focusing. According to the focusing device provided by the embodiment of the invention, the clutch structure is a