Compact waterproof lighting lamp with adjustable light beam

A portable lighting lamp, especially for mounting on the head of the user comprising:

• an electric bulb housed inside a reflector to emit a light beam through a transparent screen,
• a direct current power source comprising a positive pole and a negative pole electrically connected to the bulb by a current supply system,
• an adjsutment collar designed to ensure displacement of the reflector to cause a variation in the light beam focus, and operation of the bulb switch,
• a single casing having an insulating body subdivided by an intermediate wall into a first rear compartment housing the power supply unit, and a second front compartment housing the bulb and the adjustable focusing device, the volume of the second compartment being variable when said collar is actuated manually,
• the intermediate wall being provided with a communication orifice between the two adjacent compartments and with a fixed sleeve extending axially in the second front compartment opposite the orifice to house the bulb,
• a first elastic contact blade of the switch arranged in said orifice of the wall, and cooperating with a flange associated with the reflector, said blade being secured to a fixing point on the intermediate wall, and comprising a contact part urged by elasticity against the bulb contact stud in the closed position of the switch, and an opposite connection part located in the first rear compartment and in electrical connection with one of the poles of the power supply unit.