Patent ID: 11880042
Assignee: MEGAFORCE COMPANY LIMITED
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 3:
4. A detachable projection device, comprising:
a sealing housing including:
a first cover having a first sealing edge portion;
a second cover having a second sealing edge portion corresponding in shape to the first sealing edge portion;
a first waterproof and dustproof gasket having an enclosed loop-shape, wherein the second cover is detachably fastened to the first cover, and the first waterproof and dustproof gasket is gaplessly sandwiched between and abutted against the first sealing edge portion and the second sealing edge portion, so that the first cover, the second cover, and the first waterproof and dustproof gasket jointly define an accommodating space having an optical area and a circuit area; and
a transparent case connected to the second cover and having an insertion slot that is in spatial communication with the optical area of the accommodating space;

an optical engine detachably fastened to the first cover and located in the optical area of the accommodating space, wherein the optical engine includes a light source module and an image formation module that is optically coupled to the light source;
a light-guide optical element (LOE) assembled to the image formation module and inserted into the insertion slot of the transparent case; and
a circuit board located in the circuit area of the accommodating space and electrically coupled to the optical engine.