Patent ID: 6354721
Filing Date: 2002-03-12
Classification: F21S

Abstract:
Headlamp for motor vehicles, comprising:a single light source including a single-filament lamp; a reflector subdivided into an upper reflecting area and a lower reflecting area, said reflector including an optical axis along which is disposed said light source; a lens disposed at right angle to said optical axis to converge the light beam into a dipped/fog light beam; an intermediate screen positioned to intercept part of a light flow emitted by said light source; said intermediate screen comprising a fixed screen defining a light/dark demarcation line of the dipped/fog light beam, and a mobile screen, said fixed and mobile screens being held together by a hinge to allow said mobile screen to rotate; said intermediate screen comprising movement means to displace said mobile screen selectively between at least first and second positions, said first position for intercepting part of the light flow, and said second position for not intercepting the light flow; said intermediate screen is disposed in said lower reflecting area; a lever operably secured to said mobile screen to rotate said mobile screen; said movement means comprising an electromagnet; a mobile core supported by said electromagnet, said mobile core defining a rod having a free end to which is secured a sphere; an arm having a first end defining a spherical cavity in which said sphere is disposed, and a second end defining a seat to accommodate said lever; a helical spring wound around said mobile core, said helical spring having one end secured to said arm at a seat, and another end secured to said electromagnet at a seat; whereby when power is supplied to said electro-magnet, said electro-magnet supports said lever in a position such that said mobile screen is in said first position, and said spring generates a return force to return said lever to a position such that said mobile screen is placed in said second position.