Piezoelectric vibrator

• US 5,635,647 A
• Filed: 05/02/1995
• Issued: 06/03/1997
• Est. Priority Date: 05/12/1994
• Status: Expired due to Term

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Heinouchi, Yoshiaki
• Primary Examiner(s): Williams, Hezron E.
• Assistant Examiner(s): MILLER, ROSE MARY
• Application Number:
  US08/432,624
• Time in Patent Office: 763 Days
• Field of Search: 73/504.12, 73/504.14, 73/514.29, 73/493, 73/662, 310/315, 310/316, 310/329, 310/321, 310/326, 310/348, 310/352, 310/351, 310/353, 310/322, 310/334
• US Class Current: 73/662
• CPC Class Codes: G01C 19/5663 Manufacturing; Trimming; Mounting; Housings

Abstract

A vibrating gyroscope 10 includes a piezoelectric vibrator 12. The piezoelectric vibrator 12 includes a vibrating body 14 having a regular triangular prism shape. Grooves 16 are formed on one side face of the vibrating body 14 along its width direction. The grooves 16 are formed at portions corresponding to nodal points of the vibrating body 14. Piezoelectric elements 18a, 18b and 18c are formed on three side faces of the vibrating body 14. An M-shaped supporting members 26 are attached to the vibrating body 14 at portions in grooves 16.

Claims

1. A piezoelectric vibrator comprising:

a prism-shaped vibrating body for making a bending vibration; and

supporting members for supporting said vibrating body at portions in a vicinity of nodal points of said vibrating body,

wherein grooves are formed on only one side face of said vibrating body along a width direction at portions in the vicinity of the nodal points of said vibrating body.

2. A piezoelectric vibrator in accordance with claim 1, wherein said vibrating body is formed in a regular triangular prism shape.

3. A piezoelectric vibrator in accordance with claim 2, wherein each of said grooves has a depth which is 1/3 of a distance from said one side face of said vibrating body toward an opposite ridge line.

4. A piezoelectric vibrator in accordance with claim 1, wherein said supporting members are attached to said vibrating body at portions in said grooves.

5. A piezoelectric vibrator in accordance with claim 2, wherein said supporting members are attached to said vibrating body at portions in said grooves.

6. A piezoelectric vibrator in accordance with claim 3, wherein said supporting members are attached to said vibrating body at portions in said grooves.

7. A piezoelectric vibrator in accordance with claim 2, wherein said supporting members are attached to said vibrating body at a ridge line portions opposite to said grooves.

8. A piezoelectric vibrator in accordance with claim 3, wherein said supporting members are attached to said vibrating body at a ridge line portions opposite to said grooves.