Nissin Kogyo Co., Ltd.

Fujitsu Media Devices Limited

Kazuhiro Ohta

Masanori Yachi

Yoshitaka Takahashi

Atsushi Shimizu

Tsutomu Amano

Kazutsugu Kikuchi

Keiji Saito

Takashi Aoki

Masashi Kobayashi

Naotoshi Tamai

Mitsuhiro Hanaoka

Shuichi Shimizu

Katsuhiko Takahashi

An angular velocity sensor includes a stem and a vibrator that is supported by the stem. The vibrator is inclined to a mounting surface of the stem. The angle of inclination of the vibrator to the mounting surface is adjustable. For this reason, the angular velocity sensor also includes a holding member that holds the vibrator. This holding member is elastically deformable. A single material may be folded to shape the holding member.

Angular velocity sensor

A tuning-fork vibration gyro including a ferroelectric tuning-fork vibration body generating a plurality of sensor signals and a sensor circuit to which the sensor signals generated by the tuning-fork vibration body are input. The sensor circuit includes a differential amplifier having two input terminals between which the sensor signals are input, and a capacitor being connected between the two input terminals of the differential amplifier.

Tuning fork vibration gyro

A tuning-fork type vibration gyro enables to suppress pyroelectric noise caused by temperature change and to obtain sensor output having high signal-to-noise ratio. The tuning-fork type vibration gyro includes a tuning-fork type vibration body having two arms mutually disposed in parallel and a base for commonly supporting one end of the each arm, wherein a longitudinal direction of the two arms is defined as a z-axis and a perpendicular direction thereto is defined as an x-axis; driving electrodes respectively formed on the two arms for generating vibration of the two arms in a direction parallel to the x-axis; detecting electrodes respectively formed on the two arms for detecting electromotive force generated when the tuning-fork type vibration body is rotated around the z-axis; and dummy electrodes formed on the two arms in respective areas different from the driving electrodes and the detecting electrodes.

Tuning-fork type vibration gyro and electrode trimming method therefor

A reed switch unit,for detecting a liquid level in a reservoir,of a master cylinder which comprises a reed switch,including a contact part,which is sealingly contained in a glass tube,, and lead portions,which axially extend from opposite ends of the glass tube,, and a unit body,provided with terminals,for respectively supporting the lead portions,so as to be electrically connectable thereby to fix the reed switch,. The lead portions,and the terminals,are connected with each other by means of a resistance welding. Accordingly, it is possible to provide a reed switch unit which is improved in quality as well as enhanced in productivity, by mounting a reed switch on a unit body without conducing soldering.

Switch unit

In a brake hydraulic controller for controlling a hydraulic pressure from a master cylinder operative to a wheel brake, the controller includes a base, a normally open electromagnetic valve for connecting the master cylinder and the wheel brake, a reservoir, a normally closed electromagnetic valve for connecting the wheel brake and the reservoir, a return pump for returning hydraulic fluid received from the reservoir to the master cylinder, a damper, and a cover for covering the normally open and closed electromagnetic valves, the reservoir, and the damper with a surface of the cover. The cover includes a seal groove and a sealing member fitted to the seal groove for elastically contacting the surface. The brake hydraulic controller can minimize the number of parts required for waterproofing and reduce the number of manhours required for assembling.

Brake hydraulic controller

In a hydraulic apparatus providing a base with a discharge passage coupler to a circumferential portion of an annular discharge passage and to a damper chamber, a hydraulic device is connected via an orifice to the discharge passage without arranging the annular discharge passage between the damper chamber and the orifices, so that the damper chamber and the orifices cooperate together to exert an effective attenuating action thereon so as to suppress the transfer of pressure pulsation thereto effectively. Further, in an anti-lock brake control apparatus providing a pipe member which integrally includes an orifice interposed between a damper and a normally open electromagnetic valve, a sheet pipe corrected to an inner end of a connecting hole coaxially with the orifice, and a coupling pipe portion coaxially formed between the orifice and the sheet pipe, the sheet pipe is fitted into a large-diameter portion of the base and the orifice is fitted into a small-diameter portion of the base, thus the number of component parts is reduced and the normally open electromagnetic valves are prevented from malfunctioning due to the clogging of the orifices by dust.

Growing community of inventors

Nagano, Japan

Kazuhiro Ohta