Murata Manufacturing Co., Ltd.

Yukio Sakashita

Yoshiaki Heinouchi

Takeshi Nakamura

Akira Mori

Katsumi Fujimoto

Kenjiro Okaguchi

Hiroshi Nishiyama

Kazuhiro Yoshitani

Shozo Motohashi

A protection plate,and a protection plate,which are each of a substantially rectangular shape and which extend upwards from respective substantially central portions of opposite lengthwise ends of an attachment platform,are formed in the attachment platform,by bending part of the attachment platform,Also, stoppers,and,which have notches,for protecting two surfaces on either side of the ridge line of the oscillator,are attached to the attachment platform,Further the oscillator,the attachment platform,and the stoppers,and,etc. are housed in a box-shaped case,Accordingly, the vicinities of both lengthwise ends of the oscillator,are surrounded and protected by the stoppers,and,The protection plates,and,and the inner side surface of the case,as the protection members in the predetermined space d. By means of this structure, an oscillation gyroscope is provided in which the shock resistance is further improved.

Oscillation gyroscope

A vibrating gyroscope has a mounting substrate carrying a vibrator. The mounting substrate is supported and fixed by a plurality of connecting members at a level above a circuit board. The supporting members also provide electrical connection between a wiring on the mounting substrate and a circuitry including an oscillation circuit and a detection circuit on the circuit board. Each connecting member has one end fixed to a point on the mounting substrate substantially in the middle of the path of propagation of vibration which is between supporting pins and which detours around a slit formed in the mounting substrate.

Vibrating gyroscope

The vibrating gyroscope includes, for example, a regular triangular prism-shaped vibrating body. The vibrating body is formed with a material which generally generates mechanical vibration such as elinver, ceramics. The piezoelectric elements are respectively formed to the three sidefaces of the vibrating body. An oscillation circuit is connected between the two piezoelectric elements and the other piezoelectric element. Further, two U-shape supporting members made of metal wire are fixed to the ridge-line portions of the vicinity of the nodal points of the vibrating body. The both ends of the two supporting members are fixed to the rectangular-shaped supporting body. The supporting body has a cutting portion piercing through it from its one surface to the other or a groove portion as a suppressing means for suppressing the interference of vibrations between the fixing points of the ends of one supporting member and those of the other supporting member.

A vibratory gyroscope 10 includes a vibrator 12. The vibrator 12 includes a regular triangular prism-shaped vibrating body 14. On centers of the three side faces of the vibrating body 14, piezoelectric elements 16a, 16b and 16c are formed respectively. The vibrating body 14 is supported above a base plate 20 by supporting members. The vibrating body 14 vibrates vertically with no rotation. A case 22 is secured so as to cover the vibrating body 14. An upper portion 26 of the case 22 is so formed that its inner size in the direction of the width is shorter than a half-wave length of a sound wave of a vibrating frequency of the vibrating body 14.

Casing for a vibratory gyroscope

A vibratory gyroscope includes a vibrator. The vibrator includes a triangular prism-shaped vibrating body. On three side faces of the vibrating body, piezoelectric elements are formed respectively. Supporting members are fixed to ridge-line portions in the vicinity of nodal points of the vibrating body. The supporting members are formed into a multi-layer structure. An elastic material having a large strength is used as inner portions of the supporting members, and a material having a good solderability is used as outer portions of the supporting members. Under the vibrator, a supporting plate is provided as a shield material. Furthermore, a work cover is provided on the side of and above the vibrator as a shield material. The supporting plate and the work cover are formed by a magnetic material such as iron, nickel, stainless steel or the like. In the vicinity of the supporting members, protective members are provided. In the outer vicinity of longitudinal opposite ends of the vibrator, protective members are provided.

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Nagaokakyo, Japan

Yukio Sakashita