Nippondenso Co., Ltd.

Asmo Co., Ltd.

Denso Corporation

Akinori Yamamoto

Junichi Hasegawa

Makoto Watanabe

Kiyomitsu Oshikawa

Masaaki Kurii

Masumi Kato

Isaku Kawashima

Yoshiaki Harakawa

Kazunori Nakayama

Takenori Kuno

A lamp device is provided that is capable of performing a first actuation and a second actuation. At the first actuation, the lamp device pivots a lamp about a first axis relative to a support, and, at the second actuation, the lamp device pivots the lamp about a second axis, which is perpendicular to the first axis, relative to the support. The lamp includes a first supporting portion that is located on the first axis and at a side of the lamp and a second supporting portion that is located on the first axis and at the other side of the lamp. The first supporting portion is supported by the support to be pivotable about the intersection point of the first axis and the second axis. The second supporting portion is joined to a movable joint member. The movable joint member is supported by the support so as to be movable along a second actuation axis.

Lamp device

It is an object of the present invention to provide a rotational driving apparatus for a motor vehicle, which moves optical axis of headlights in response to a steering angle of a steering wheel, and which can accurately determine that an output shaft is in good operational order, while accepting errors inevitably taking place. According to the present invention, it is determined that the output shaft of the rotational driving apparatus is operating in a good order, when a first and a second detected voltage at a first and a second detection position are within a predetermined error range and when a deferential voltage between the first and second detected voltages is within a certain deferential voltage span.

Rotational driving apparatus

An antenna rod, which is extendible and retractable, is moved up and down by a cable with a rack, and the cable is moved with rotation of a pinion gear. The rotational force of a DC motor is transferred to the pinion gear by a route of a worm, a worm wheel, gears, a damper gear, and a damper. The damper is a coil of resilient metal wire, and both ends of the coiled wire, respectively, engage stopping members, which are provided at the center portions of the damper gear and the pinion gear. When the pinion gear is at a standstill, the rotational energy of the damper gear is accumulated in the damper. The motor is rotated under control of a control circuit in response to the operation of a switch. The drive current for the motor is shut off by a detecting signal from a lock detector during the course of accumulating the rotational energy by the damper. The lead angle of the teeth of the worm is large so that the rotational energy stored in the damper is transferred to the motor.

Apparatus for reducing stress on component elements during extension and

There is provided an electric antenna apparatus which is mounted on a vehicle such as an automobile, and in which the rotation of a DC motor drives and rotates a pinion through a reducing mechanism, and a cable coupled to the base end portion of an antenna rod is coupled to this pinion so as to come into engagement therewith. The cable is driven in its longitudinal direction due to the pinion, rotated in response to the rotation of the motor, and the antenna rod coupled to this cable is driven, thereby allowing the antenna rod to be extended or retracted. In this case, a magnetic disk, formed with a plurality of magnetic poles in its outer peripheral portion, is mounted to a worm wheel constituting the reducing mechanism so that the magnetic disk is rotated coaxially with the worm wheel. Also, a reed switch is attached to a circuit board set adjacent to the motor, thereby allowing a pulse-like signal from the reed switch to be detected in response to the rotation of the magnetic disk. A control circuit which constitutes a drive circuit to drive the motor and to which the pulse signal from the reed switch is supplied is installed in the circuit board. Due to this control circuit, the rotating state of the motor is controlled in response to an operation command, thereby allowing the antenna rod to be extended or retracted.

Motor driven extensible rod antenna for vehicles with position control

A driving apparatus which includes a driving and driven belt pulleys at least one of which is constructed to change the effective diameter thereof, in response to the rotational speed of a driving power source. An endless v-belt serves as the driving connection between the driving and driven pulleys. The belt pulley with a changeable effective diameter has a first fixed pulley plate, a second slidable pulley plate and at least one weight operated by the centrifugal force acting thereon. The weight serves to shift the second pulley plate relative to the first pulley plate thereby to change the effective diameter of an annular groove defined between the first and second pulley plates with the increase of the centrifugal force. Therefore, the speed ratio of a driven unit to the driving power source is varied in response to the speed of the driving power source.

Growing community of inventors

Kosai, Japan

Akinori Yamamoto