Abstract: A light axis adjusting device for use to the headlamps of motor vehicles comprising casings, a motor arranged in the casings, a speed reduction mechanism arranged in the casings and functionally connected to the motor and a hollow gear, respectively, to reduce the output of the motor and transmit it to the hollow gear, a sleeve inserted into the hollow gear and moved linearly when the hollow gear is rotated, a converting mechanism for converting the rotation of the hollow gear to a force which causes the sleeve to be moved linearly, and a driver shaft passed through the sleeve to control and adjust the light axis of the headlamp, following the movement of the sleeve.

Abstract: A device for adjusting the inclination of the light axis of a headlamp for motor vehicles comprising a level-adjusting mechanism including a casing, a driver mechanism having a motor housed in the casing, a hollow gear operationally connected to the driver mechanism and located in the casing in such a way that it is rotated at a certain position in the casing by means of the driver mechanism, a cylindrical body inserted into the hollow gear and moved linearly when the hollow gear is rotated, a converter mechanism for converting the rotation of the hollow gear to a force which causes the cylindrical body to move linearly, and an adjusting rod arranged through the cylindrical body and reciprocated in association with the movement of the cylindrical body to adjust the light axis of the headlamp; and aim-adjusting mechanism having a connecting rod, which is connected, at one end thereof, to the adjusting rod of the level-adjusting mechanism through a first universal coupling mechanism, arranged coaxially with the