US Patent 9140431 Lighting device with adjusting mechanism

A lighting device includes a lighting module and a focusing module. The lighting module has a body and a barrel. The body has a base at one side to couple with the barrel and a light source on the base. The barrel has a pair of inclined grooves in an inner periphery thereof. The focusing module has a reflecting cup and a focusing member. The reflecting cup has a pair of slots horizontally disposed therein. The focusing member has a focusing lens corresponding to the light source and two bolts extending from opposite sides of the focusing lens. Each of the two bolts passes through the respective slot of the reflecting cup and movably inserted in the respective inclined groove of the barrel with one end such that rotational movement of the barrel drives the focusing member to move horizontally along the slots of the reflecting cup.