Multi-blade lens cover device

Abstract

The invention discloses a multi-blade type lens cover device which comprises a lens cover outer ring and a lens cover inner ring which can synchronously and circumferentially rotate to control the opening and closing of blades. A fixed lens cover lantern ring used for limiting the rotation range of the lens cover outer ring and the lens cover inner ring is arranged between the lens cover outer ring and the lens cover inner ring. The multi-blade type lens cover device further comprises limiting pieces which are arranged on the lens cover lantern ring and are used for locking the lens cover outer ring and the lens cover inner ring. An inner wall of the lens cover outer ring is provided with an arc-shaped track used for enabling the limiting pieces to move, two ends of the arc-shaped track are provided with grooves, the lens cover lantern ring is provided with elastic pieces used for driving the limiting pieces to pop out of the grooves, and the blades are in a complete opening state anda complete closing state correspondingly when the limiting pieces are located in the different grooves. By using the device, a phenomena that a blade mechanism is partially closed, a lens cover is mistakenly touched by focusing and the like in the impact and focusing process of the lens cover can be avoided, and the lens can be prevented from being damaged after the lens cover is opened by external force.

Description

technical field [0001] The invention relates to the technical field of infrared front-end thermal imager devices, and more specifically relates to a multi-blade lens cover device. Background technique [0002] The monocular infrared front multi-function thermal imager is a new type of infrared thermal imager, which can effectively increase the viewing angle under the condition of the same viewing distance when used in conjunction with a white light sight. In addition, it is small in size and easy to carry, and can be used as a monocular handheld infrared thermal imager. At the same time, the monocular infrared front-end multifunctional thermal imager is used in firefighting, rescue, hunting and other equipment fields. It can be installed on helmets and guns, and is shockproof, waterproof, dustproof, and monocular observation does not block the line of sight, etc. Moreover, since the monocular infrared front-facing multifunctional thermal imager is installed on the helmet an...

AI Technical Summary

Problems solved by technology

However, in the process of focusing and being impacted by external forces, the multi-blade lens cover is prone to accidental contact of the lens cover by the focusing operation and partial closure of the blade mechanism due to external force impact, which eventually blocks the optical path or scratches the lens.

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