Asmo Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Kabushiki Kaisha Tokai Rika Denki Seisakusho

Teruhisa Matsushita

Toshihiro Uchida

Shoichi Ishihara

Noriyuki Suzuki

Yuusaku Nishimura

Etsuo Shimizu

Yoshiyuki Seki

Hiroyuki Furukoshi

Motoya Yamamoto

Takeshi Fujii

Yusaku Nishimura

Toshiki Nogami

Tatsuya Michihiro

Masao Nakata

A 2-L slider supported by a shaft so as to be slidable in a predetermined range substantially in a vehicle transverse direction that, when pressed by a shift lever which is being a select-operated to an &ldquo;L&rdquo; position, slides toward a detent wall against an urging force of a compression coil spring. At this time, a cam portion provided at the 2-L slider presses a press receiving block provided at a shift lock plate downward. Thus, a slider which slides with the shift lock plate moves downward. A position detecting mechanism detects that the slider has moved downward. The position detecting mechanism is not a mechanism specially provided for detecting select operation to the &ldquo;L&rdquo; position, but a mechanism for detecting whether or not the shift lever is positioned at a &ldquo;P&rdquo; position. Therefore, costs can be kept down.

Shift lever device

A pair of stationary contacts is held on the inner wall of a cylindrical case. The case is closed by a cover having a through-hole, and a bearing is fixed on the cover, such that an operation shaft extends through the bearing such as to be vertically displaceable with respect to the case. The operation shaft is biased upwards by a coil spring provided between its lower end and the bottom surface of the case. A contact piece having a plurality of movable contacts is inserted between the lower end of the operation shaft and the spring, such that it makes contact with the stationary contacts and separates therefrom along with the axial movements of the operation shaft.

Switch

In a motor drive apparatus for an ultrasonic motor, a microcomputer checks whether a starter is driven within a predetermined time period from a detection of motor lock, when the motor lock is detected before the detection of a decrease in a battery voltage. The starter drive is stored in its internal memory. The microcomputer checks whether the starter was driven within the predetermined time period, when the battery voltage is restored and the starter drive is completed. The microcomputer drives the ultrasonic motor again if the check result indicates that the starter motor was driven.

Motor drive apparatus having power supply restoring function

An ultrasonic motor drive apparatus includes a transformer having a primary coil and a secondary coil which drives a piezoelectric body of an ultrasonic motor. One end and the other end of the primary coil are connected to the drains of MOSFETS. The gates of the MOSFETs are connected to receive switching signals to alternately turn on and off electrical currents which flow in the primary coil. The sources of the MOSFETs are connected to the ground through ferrite beads, respectively. The ferrite bead generates a counter electromotive voltage so that the surge voltage which develops on the drain of the MOSFET at the time of turning off of the MOSFET is suppressed and high frequency oscillations are suppressed.

Ultrasonic motor drive apparatus having surge and oscillation suppressing member

Growing community of inventors

Toyota, Japan

Teruhisa Matsushita