Hemispherical opening-closing lens shielding device based on gear structure

Abstract

The invention discloses a hemispherical opening-closing lens shielding device based on a gear structure. The hemispherical opening-closing lens shielding device comprises a clack set, a gear set and a motor, wherein the clack set comprises at least two clacks, which are pivotally connected on the same rotating axis, each clack is provided with a corresponding closing position and a corresponding opening position, a hemispherical surface is formed and covers a convex lens when each clack is at the corresponding closing position, and the clack is outside the visual angle of the convex lens when each clack is at the corresponding opening position; the gear set is used for driving each clack of the clack set to rotate between the corresponding closing position and the corresponding opening position, so as to enable the clacks to simultaneously reach the corresponding closing positions or the corresponding opening positions; and the motor is used for providing power for the gear set. Since the clacks are driven by the gear set to rotate at different speed in different directions and only one motor is used for realizing the driving and accurate position of the clacks, the hemispherical opening-closing lens shielding device based on the gear structure has the advantages of simple structure, accurate moving position, stable and reliable parts and small manufacturing difficulty.

Description

technical field [0001] The invention relates to an openable and closable hemispherical lens shielding device, in particular to a hemispherical openable and closable lens shielding device based on a gear transmission structure. Background technique [0002] Image acquisition equipment such as cameras and cameras are basically equipped with a lens shielding device. When the equipment is not shooting images, the shielding device is closed to protect the lens and photosensitive devices. When shooting is required, the shielding device is opened manually or mechanically. The common mechanical blocking device generally adopts the baffle type, which is designed for translational opening and closing movement. This will not affect the imaging when using a lens with a small viewing angle, but when using a lens with a large viewing angle such as ultra-wide-angle and fisheye , because the front end of this type of lens has a protruding lens unit, if the position of the lens remains uncha...

AI Technical Summary

Problems solved by technology

The common mechanical blocking device generally adopts the baffle type, which is designed for translational opening and closing movement. This will not affect the imaging when using a lens with a small viewing angle, but when using a lens with a large viewing angle such as ultra-wide-angle and fisheye , because the front end of this type of lens has a protruding lens unit, if the position of the lens remains unchanged, the mechanical structure of the translation block will usually still be located within the viewing angle range of the lens after opening, reducing the effective imaging range

Images