Abstract: An air compressor according to an aspect of the present invention comprises: a housing; a rotating shaft which is disposed in the housing; a compression unit which is connected to the rotating shaft to compress and discharge inlet air; a motor unit which drives the rotating shaft; a control board which controls the motor unit; and a filter unit which filters out noise from external power and supplies the external power to the control board, wherein the housing includes a first cooling flow channel for cooling the motor unit and a second cooling flow channel for cooling the filter unit, and the first cooling flow channel communicates with the second cooling flow channel.

Abstract: The present invention relates to an air foil journal bearing in which air is introduced between a foil and a rotor rotating at high speed and generates pressure to support a radial load of the rotor and allow the rotor to rotate smoothly, and more particularly, to a housing fixing structure of an air foil journal bearing that improves durability against external impact or vibration by restricting an axial movement of a bump by means of two opposite ends of the bump and a top foil fixing portion.

Abstract: Disclosed is a lamp assembly that provides various beam radiation pattern to correspond to various driving environments of a vehicle. The lamp assembly includes a lamp, a lamp shield driving device partially blocking light emitted from the lamp to form a beam radiation pattern, a lens forward focusing the blocked light, and a housing receiving the lamp and the lamp shield driving device. The lamp shield driving device includes a cylindrical rotary shield, a mover, and a driving unit. The cylindrical rotary shield includes one or more shield protrusions and a screw cam on a peripheral surface thereof, each of the shield protrusions has a predetermined cutoff pattern, and a screw cam has a predetermined pitch. The mover includes a guide protrusion on an upper surface thereof, and the guide protrusion is engaged with the screw cam. The driving unit linearly moves the mover in an axial direction of the cylindrical rotary shield.