High/low beam switching device and headlamp comprising the same

A headlamp, comprising:

• a base including a lamp assembly and a reflector, wherein the lamp assembly has an LED unit, and the reflector is mounted over the lamp assembly;
• a lens;
• and
• a switching device, disposed between the base and the lens, including:
• a fixing plate defining an opening which is divided into three zones including an upper space, a middle space, and a lower space;
• a shielding member pivotally connected to the fixing plate for covering the middle space of the fixing plate, the shielding member being configured with a reflective concave surface;
• and
• a solenoid device mounted to the fixing plate and provided with a shaft inserted through the lower space of the fixing plate to be coupled with the shielding member, so that the shielding member can be turned away from the fixing plate to uncover the middle space of the fixing plate;
• wherein, when the middle space is covered by the shielding member, a front half of the light rays emitting from the LED unit is reflected by the reflector to pass through the lens without contacting the shielding member, while a rear half of the light rays emitting from the LED unit is obstructed by he shielding member, thus providing a low beam illumination pattern;
• when the middle space is uncovered by shielding member, the front half of the light rays emitting from the LED unit is reflected by the reflector to pass through the lens without contacting the shielding member, while the rear half of the light rays emitting from the LED unit is sequentially reflected by the reflector and the reflective concave surface of the shielding member to pass through the lens, thus providing a high beam illumination pattern.