Spotlight unit with adjustable lens module

A spotlight unit, comprising:

• a main housing having a receiving cavity;
• an illuminating module mounted in the receiving cavity, the illuminating module comprising a main control board and a plurality of illuminating units for generating illumination;
• an adjustable lens module mounted in the receiving cavity of the main housing at a position corresponding to the illuminating module, the adjustable lens module comprising at least one lens element which is in optical communication with the illuminating units, at least one of the illuminating module and the adjustable lens module being arranged to adjustably move with respect to the main housing so as to alter a distance between the illuminating module and the adjustable lens module for adjusting a focal length of the lens element with respect to the illuminating units to achieve at least two projection effects;
• and
• an actuation mechanism provided in the receiving cavity of the main housing and operatively coupled to the illuminating module for selectively driving the illuminating module to move in the receiving cavity, the actuation mechanism comprising a movable driving platform and a supporting base securely mounted in the receiving cavity of the main housing, wherein the movable driving platform is coupled to the supporting base in an adjustably movable manner, the movable driving platform comprising a connecting panel and an insertion base extending from the connecting panel, the connecting panel being connected to a rear side of the main control board, the insertion base rearwardly extending from the connecting panel to movably couple to the supporting base, wherein the movable driving platform further has a guiding pin outwardly extending from the insertion base, the supporting base having an accommodating cavity arranged to movably accommodate the insertion base of the movable driving platform along a depth of the supporting base, the supporting base further having a guiding slot formed on a sidewall thereof at a position corresponding to that of the guiding pin, the guiding slot extending from a front opening of the accommodating cavity and extending along the sidewall, the guiding pin being arranged to slide along the guiding slot.