Abstract: A vehicle front seat of the kind capable of being selectively rotated into a forward position or rearward position has a turntable unit or rotation adjusting mechanism provided between the seat and a vehicle floor. The rotation adjusting mechanism includes a stationary circular guide and a rotating disk disposed inside the stationary guide. The rotating disk is provided with a latching arm having an engagement tooth. The stationary guide has a locking through hole for engagement with the engagement tooth of the latching arm. A cam is disposed inside the locking through hole and capable of contacting the engagement tooth inserted into the locking through hole. The cam is rotatable in response to movement of the engagement tooth. An amount of rotation of the cam is detected by a microswitch. The cam is provided with first and second circular arc cam surfaces and capable of absorbing possible errors in attached positions of the constituent parts of the rotation adjusting mechanism.

Abstract: A structure is provided for headlamps for vehicles, having a light source, a reflector, and a front lens in which the lens is slanted with respect to a vertical direction of a vehicle body, a rear surface of the lens is formed with a prism zone for forming a light diffusion zone on a light distribution pattern of a given screen and another prism zone for forming a hot zone on the distribution pattern, and the reflector is formed with a first reflecting surface which corresponds optically to the light diffusion zone forming prism zone and diffuses light beams emitted from the light source in a horizontal cross section with respect to an optical axis of the light source and reflects the light beams of the light source substantially in parallel to the optical axis in a vertical cross section and with a remaining reflecting surface substantially in the form of a paraboloid of revolution. Consequently, both ends of the light distribution pattern in the horizontal direction neither droop nor rise.

Abstract: A mounting structure for a vehicular lighting unit is provided with a restriction means to prevent the lighting unit from being dismantled from the outside of the vehicle without removing the cover member on the lighting unit.