Patent ID: 8820947

Claim:
A projection apparatus with locking structure, comprising: an apparatus case, comprising a main casing, a lid and at least one locking structure, wherein the locking structure comprises: at least one slot and at least one elastic arm both disposed at the main casing, wherein the elastic arm is located in the slot and each the slot has a first end and a second end opposite to the first end; and at least one positioning pillar disposed at the lid, wherein when the lid covers the main casing and the positioning pillar correspondingly extends into the first end of the slot, the lid is capable of rotating relatively to the main casing and bringing the positioning pillar to simultaneously move along the corresponding slot to the corresponding second end, and when the positioning pillar is located at the second end, the elastic arm of the corresponding slot makes the positioning pillar being positioningly limited at and lean against the second end for avoiding a separation between the lid and the main casing, wherein the elastic arm has a retaining bump, the positioning pillar is capable of pushing away the retaining bump during moving along the corresponding slot by withstanding an elastic force of the elastic arm so as to move to the second end, and when the positioning pillar is located at the second end, the retaining bump leans against the positioning pillar for preventing the positioning pillar from moving away from the second end along the corresponding slot; a light source, disposed in the apparatus case for providing an illumination beam; a light valve, disposed in the apparatus case for converting the illumination beam into an image beam; and a lens, disposed in the apparatus case for converting the image beam into a projection beam.