# US 2014/0192625 A1 · Piezoelectric vibrating piece, piezoelectric vibrator, oscillator, electronic apparatus, and radio-controlled timepiece

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- Number: US 2014/0192625 A1
- Document ID: US20140192625A1
- Status: Published application
- Kind: A1
- Application number: 14/148,289
- Filed: 2014-01-06
- Published: 2014-07-10
- Earliest claimed: 2013-01-10
- Assignees: SII Crystal Technology Inc.
- Applicants: SII Crystal Technology Inc.
- Inventors: Masanori TAMURA
- Web page: https://patentgrep.com/patent/US20140192625A1

## CPC

- H03H 9/21: Crystal tuning forks
- G04C 3/008: {Mounting, assembling of components}
- G04C 3/12: driven by piezoelectric means; driven by magneto-strictive means
- G04R 20/08: the radio signal being broadcast from a long-wave call sign, e.g. DCF77, JJY40, JJY60, MSF60 or WWVB
- H03B 5/36: active element in amplifier being semiconductor device ({H03B5/323, H03B5/326} , H03B5/38 take precedence)
- H03H 9/02157: {Dimensional parameters, e.g. ratio between two dimension parameters, length, width or thickness}
- H03H 9/0519: {for cantilever (H03H9/1021 takes precedence)}
- H03H 9/1021: {the BAW device being of the cantilever type}
- H03H: IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS (waveguides, resonators, lines or other devices of the waveguide type H01P)
- G04C: ELECTROMECHANICAL CLOCKS OR WATCHES
- G04R: RADIO-CONTROLLED TIME-PIECES
- H03B: GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS (generators adapted for electrophonic musical instruments G10H; masers or lasers H01S; generation of oscillations in plasma H05H)

## Abstract

A piezoelectric vibrating piece includes a pair of vibrating arm portions which are arranged with a center axis interposed therebetween, a base portion which is arranged between a pair of vibrating arm portions and fixed to the outside, and a pair of connecting portions which connect proximal end portions of a pair of vibrating arm portions and a proximal end portion of the base portion. The distance between distal end portions of the vibrating arm portions and the center axis is smaller than the distance between the proximal end portions of the vibrating arm portions and the center axis.

## Claims

### Claim 1

A piezoelectric vibrating piece comprising:
a pair of vibrating arm portions;
a base portion which is provided between the pair of vibrating arm portions, and
connecting portions which connect proximal end portions of the vibrating arm portions and the proximal end portion of the base portion,
wherein the vibrating arm portions are provided so as to be inclined toward the base portion side.

### Claim 2 (depends on 1)

The piezoelectric vibrating piece of claim 1, wherein the intersection angle of the vibrating arm portions and the connecting portions is smaller than 90 degrees.

### Claim 3 (depends on 1)

The piezoelectric vibrating piece of claim 1, wherein the intersection angle of the base portion and the connecting portions is smaller than 90 degrees.

### Claim 4 (depends on 1)

The piezoelectric vibrating piece of claim 1, wherein the connecting portions has at least one bent portion.

### Claim 5 (depends on 1)

The piezoelectric vibrating piece of claim 1, wherein the distal end portion of the base portion has a chamfered shape.

### Claim 6 (depends on 1)

A piezoelectric vibrator comprising the piezoelectric vibrating piece of claim 1 sealed airtight in a package.

### Claim 7 (depends on 6)

An oscillator comprising the piezoelectric vibrator of claim 6 electrically connected to an integrated circuit.

### Claim 8 (depends on 6)

An electronic apparatus comprising the piezoelectric vibrator of claim 6 electrically connected to a counter unit.

### Claim 9 (depends on 6)

A radio-controlled timepiece comprising the piezoelectric vibrator of claim 6 electrically connected to a filter unit.