Contour vibration mode piezoelectric resonator
First Claim
Patent Images
1. A contour vibration mode piezoelectric resonator comprising:
- a vibrating portion having opposed relatively short sides and opposed relatively long sides, at least one supporting portion, and at least one bridge portion connecting the vibrating and supporting portions;
said vibrating, supporting and bridge portions all being integrally formed as a single piece;
wherein the supporting portion comprises a resilient portion connected to substantially the center of one short side of the vibrating portion through said bridge portion, an attenuation portion connected to said resilient portion, and a fixing portion connected to or forming a part of the attenuation portion; and
wherein the relationship between the width W of the short side of the vibrating portion, the width W0 of the bridge portion, and the length L1 and the width W1 of the resilient portion is represented by;
space="preserve" listing-type="equation">0.015≦
(W.sub.0 /W)≦
0.200, and
space="preserve" listing-type="equation">5≦
(L.sub.1 /W.sub.1)≦
25.
1 Assignment
0 Petitions
Accused Products
Abstract
A contour vibration mode piezoelectric resonator has a vibrating portion and at least one supporting portion integrally connected to the vibrating portion by way of a bridge portion. The supporting portion comprises a resilient portion directly connected to the vibrating portion, an attenuation portion integrally connected to the resilient portion and which is insubstantially displaced by vibration during use and a fixing portion fixable on a supporting member and which is either integrally connected to or forms a part of the attenuation portion.
58 Citations
24 Claims
-
1. A contour vibration mode piezoelectric resonator comprising:
- a vibrating portion having opposed relatively short sides and opposed relatively long sides, at least one supporting portion, and at least one bridge portion connecting the vibrating and supporting portions;
said vibrating, supporting and bridge portions all being integrally formed as a single piece;
wherein the supporting portion comprises a resilient portion connected to substantially the center of one short side of the vibrating portion through said bridge portion, an attenuation portion connected to said resilient portion, and a fixing portion connected to or forming a part of the attenuation portion; and
wherein the relationship between the width W of the short side of the vibrating portion, the width W0 of the bridge portion, and the length L1 and the width W1 of the resilient portion is represented by;
space="preserve" listing-type="equation">0.015≦
(W.sub.0 /W)≦
0.200, and
space="preserve" listing-type="equation">5≦
(L.sub.1 /W.sub.1)≦
25. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- a vibrating portion having opposed relatively short sides and opposed relatively long sides, at least one supporting portion, and at least one bridge portion connecting the vibrating and supporting portions;
-
15. A contour vibration mode piezoelectric resonator comprising:
- a vibrating portion having opposed relatively short sides and opposed relatively long sides, two supporting portions, and two bridge portions connecting the two supporting portions to the centers of respective ones of the short sides of said vibrating portion;
said vibrating, supporting and bridge portions all being integrally formed as a single piece;
wherein each of the two supporting portions comprises a resilient portion extending parallel to the short sides of the vibrating portion, an attenuation portion, connecting portions connecting the ends of the resilient portion to the ends of the attenuation portion, and a fixing portion connected to or forming a part of the attenuation portion, and wherein the connected together resilient and attenuation portions define a generally rectangular opening which is surrounded by the connected together resilient, connecting and attenuation portions. - View Dependent Claims (16)
- a vibrating portion having opposed relatively short sides and opposed relatively long sides, two supporting portions, and two bridge portions connecting the two supporting portions to the centers of respective ones of the short sides of said vibrating portion;
-
17. A contour vibration mode piezoelectric resonator comprising:
- a single piece of piezoelectric material having a vibratory portion, a bridge portion and a supporting portion, said vibratory portion having a pair of opposite major surfaces bounded by a pair of opposed relatively short side surfaces and a pair of opposed relatively long side surfaces, said supporting portion having an elongate resilient portion spaced from and extending in the same general direction as one of the short side surfaces, an elongate attenuation portion spaced from and extending in the same general direction as said resilient portion and connecting portions connecting the ends of the resilient portion to the ends of the attenuation portion, and said bridge portion being connected at one end to substantially the center of one of the short side surfaces and being connected at its other end to substantially the center of the resilient portion of said supporting portion.
- View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
Specification