Lens adjusting mechanism

A lens adjusting mechanism, comprising:

• a lens carrier, having a first light-path through hole, a second light-path through hole, and a through-hole edge adjacent to the first light-path through hole;
• a thin elastic element, having at least one elastic hook attached to the through-hole edge;
• and
• at least one combiner for combining the through-hole edge and the thin elastic element,
• wherein the combiner is capable of adjusting a distance between the thin elastic element and the through-hole edge.

A lens adjusting mechanism, comprising:

• a light-valve case, having a light emitting opening and a first edge adjacent to the light emitting opening;
• a projecting lens case, having a first opening, a second opening, and a second edge adjacent to the first opening;
• at least one fastener to connect the first edge and the second edge;
• and
• an elastic element, comprising a spring abutment, a spring, and a spring head, an end of the spring contacts against the spring abutment, the other end of the spring contacts against the spring head, the spring abutment is fixed on one of the first edge and the second edge, and the spring head contacts against the other of the first edge and the second edge,
• wherein the fastener is to adjust a distance between the first edge and the second edge, the lens adjusting mechanism further comprises a light-valve and a lens module, the light valve is disposed on the light-valve case, the projecting lens case is to hold the lens module, the spring abutment of every of the at least one elastic element has the same direction toward the spring head, and the fastener is a screw, a bolt or a clip.