Abstract: A device and a method for locking lens in a lens holder are provided, wherein the lens is configured in a voice-coil motor (VCM) of a camera module of a cell phone and the VCM has a lens holder for a lens being fixed inside. The device includes a circumgyration stop instrument having a bottom surface for urging against the top surface of the lens holder for preventing a lateral stress and a lateral movement from occurring on the lens holder while the circumgyration stopping unit is coupled with the lens holder.

Abstract: A device for locking lens and a method for the same are provided. The device is used in a voice-coil motor of a photographing module of a cell phone. The voice-coil motor has a lens-stand for a lens being turned to a locking depth inside. The device includes a circumgyration-stop instrument having a first sustaining surface, and a focusing ring having a turning end. A turn-locking length of the turning end is equal to the locking depth inside. The device includes a circumgyration-stop preventing a pressure being persisted to apply on the lens as the focusing ring finishes the turn of the lens. The first turn-stop surface props the first sustaining surface as the focusing ring is turned to an extremity of the turn-locking length. The focusing ring accordingly escapes the circumgyration-stop instrument for finishing the focusing of the lens in the lens-stand.

Abstract: A portable multimedia projection device is provided for showing the multimedia information for a plurality of audiences and promoting the sharing quality of the multimedia information. The portable multimedia projection device includes a data storage unit, an image projecting unit, a control circuit, and an independent power. The data storage unit is disposed to store a multimedia data, the image projecting unit is electrically connected to the data storage unit, and disposed to project the multimedia data, the control circuit is electrically connected to the data storage unit and the image projecting unit and disposed to control the operating, transmitting, and broadcasting of the multimedia data, and the independent power is disposed to provide the electric power the portable multimedia projection device needs to operate.