Lens module and LED illumination device using the same

A lens module comprising:

• a plate defining a plurality of seats;
• each seat comprising an aperture passing through from a top surface of the plate to a bottom surface of the plate, a supporting structure arranged on the top surface of the plate and at peripheral edge of the aperture of the seat having two notches at opposite sides of the aperture of the seat, and a suppressing structure having two opposite blocks protruding from an interior wall of the aperture;
• and
• a plurality of lens units each fixed on the respective seat of the plate, each comprising a lens body, a first engaging structure and a second engaging structure;
• the lens body received in the aperture of the respective seat of the plate having a light incident surface at a top thereof and facing the same direction as the top surface of the plate, a light exit surface at a bottom thereof facing the same direction as the bottom surface of the plate;
• the first engaging structure comprising a frame formed on a peripheral edge of the top incident surface of the lens body and two lugs formed on opposite sides of the frame the second engaging structure arranged at the peripheral edges of the lens body comprising two extensions formed on opposite sides of the lens body and extending outside the frame of the first engaging structure, wherein the two notches receive the two lugs respectively thereon and blocks the lugs from moving and rotating so as to keep the lens unit from coming off towards the direction that the light exit surface faces;
• wherein the two extensions of the second engaging structure are blocked by the two opposite blocks of the suppressing structure to prevent the lens unit from coming off towards the direction that the light incident faces.