Optical fiber mounting mechanism and projection device having the same

An optical fiber mounting mechanism, comprising:

• an optical fiber extending along a first direction, wherein the optical fiber comprises an engaging section;
• a signal circuit extending along the first direction;
• and
• a mounting structure disposed at ends of the optical fiber and the signal circuit, wherein the mounting structure surrounds the optical fiber and the signal circuit, the mounting structure comprises an installation portion extending radially relative to the first direction as an axis direction, the installation portion comprises a plurality of elements exposed from a surface of the installation portion, and the surface comprises a normal direction parallel with the first direction, the elements of the installation portion comprise a plurality of signal contacts connecting with the signal circuit, the signal contacts extend along the first direction, and a first length of the engaging section of the optical fiber protruding from the surface of the installation portion is longer than a second length of the signal contacts protruding from the surface of the installation portion.