Abstract: A self-powered portable electronic device includes a main body, a cover slidably assembled on the main body, a sliding part secured on the cover, and a power generating device. The power generating device includes a rack secured on the sliding part, a power generating module assembled on the main body, and a gear engaging the rack and assembled on the power generating module. The cover slides the rack relative to the main body, and the gear is rotated by the rack and drives the power generating module to generate operating power.

Abstract: A positioning mechanism (24) for use in a mold structure (100) to position a film (30) within the mold structure is provided. The mold structure includes a core mold portion (10) and a cavity mold portion (20) mating with the core mold portion. The core mold portion includes a core plate (12) and a core insert (14) formed on the plate. The cavity mold portion includes a positioning mechanism having a moveable cavity insert (242) and an elastic member (244) for outwardly biasing the cavity insert.

Abstract: A lens cover slidably mounted to a lens comprises a main body and two guide plates protruding from opposite sides of the main body. Each guide plate has a plurality of contact portions. Each contact portion includes a plurality of projection strips protruding from a surface thereof and facing the lens.

Abstract: A lens cover slidably mounted to a lens comprises a main body and two guide plates protruding from opposite sides of the main body. Each guide plate has a plurality of contact portions. Each contact portion includes a plurality of projection strips protruding from a surface thereof and facing the lens.

Abstract: A portable electronic device includes a control module, a battery and a charging module. The battery electrically connects with the control module to supply the power. The charging module includes an electric energy generating body and a bump body. The electric energy generating body is made of piezoelectric material. The bump body is movably assembled within the charging module to impact and deform the electric energy generating body to generating electric energy. The charging module is electrically connected with the battery to charge the battery.

Abstract: A self-powered portable electronic device includes a main body, a cover slidably assembled on the main body, a sliding part secured on the cover, and a power generating device. The power generating device includes a rack secured on the sliding part, a power generating module assembled on the main body, and a gear engaging the rack and assembled on the power generating module. The cover slides the rack relative to the main body, and the gear is rotated by the rack and drives the power generating module to generate operating power.

Abstract: A plastic housing includes a substrate, an activating metal coating made of noble metal, a chemical metal coating deposited on the activating metal coating, an oxidized metal film formed on and partially covering the chemical metal coating, an electroplated metal coating formed on a portion of the chemical metal coating not covered by the oxidized metal film, and a patterned ink coating formed on the oxidized metal film. The patterned ink coating is recessed relative to the electroplated metal coating.

Abstract: A positioning mechanism (24) for use in a mold structure (100) to position a film (30) within the mold structure is provided. The mold structure includes a core mold portion (10) and a cavity mold portion (20) mating with the core mold portion. The core mold portion includes a core plate (12) and a core insert (14) formed on the plate. The cavity mold portion includes a positioning mechanism having a moveable cavity insert (242) and an elastic member (244) for outwardly biasing the cavity insert.