Flashlight

A flashlight comprising:

• a tubular, elongated body including a push button hole near a front end, an inner straight groove extending from the front end to the button hole for a push button of a switch base to fit into and slide along, the push button then protruding up through the button hole;
• the elongated body including a female thread in the front end to engage a lamp base;
• a switch base consisting of two semi-round half bodies which form a round body which is deposited in the elongated body, the switch base having an annular groove in an intermediate portion to facilitate turning the switch base, and wherein an upper semi-round half body includes point projections and a lower semi-round half body includes holes to receive the projections so that the two halves of the switch base are securely meshed;
• the elongated body further including an inner cavity in its front end for a locating ring with a female thread to fit therein, said locating ring contacting a lamp secured in the lamp base so that a conductive point of the lamp is in communication with a front portion of an L-shaped conductor which is urged to a contact position with the locating ring by a spring so that electricity flows stably from batteries deposited in the tubular body to illuminate the lamp, the locating ring being constructed to accommodate multiple types of lamp bases;
• a head of a cylindrical shape combined with the front end of the tubular body;
• and
• a tail cap combined with the rear end of the tubular body.