Device for confirming optical-axis adjustment of automotive headlamp

摘要

In an optical-axis adjustment confirming device for use with an automotive headlamp, a level is mounted on a to-be-adjusted member which is covered with a transparent cap to protect the level against external shock or the like. An initial setting device has a resilient retainer which can be provided integrally on a mount member or casing, so as to reduce the number of parts required. The resilient retainer provided for the level can absorb the distortion caused due to a difference in thermal expansion ratio between the casing and bubble tube and may include pawls and cuts formed at both sides of the pawls to permit the pawls to resiliently open and close. Couplings may be provided to prevent an edge of the casing from being deformed, and thus the bubble tube can be rigidly fixed in the casing. Since the body and cover are formed integrally, the level can be made of a reduced number of parts. A level reference provided on the casing permits an accurate confirmation of the optical-axis adjustment.