Abstract:
A piezoelectric vibrator including a package having a base member, a lid member forming a cavity with respect to the base member, and a piezoelectric vibrating piece mounted on a mount surface and housed inside the cavity, in which the piezoelectric vibrating piece has a pair of vibrating arm portions and a base portion cantilever-supporting base end portions of the pair of vibrating arm portions and being mounted on the mount surface, a concave portion for avoiding contact with respect to tip portions when the vibrating arm portions are displaced in a thickness direction is formed on the mount surface, contact portions contacted by main surfaces of the vibrating arm portions facing the mount surface, and clearance portions for avoiding contact with at least one edge-line portion of two edge-line portions where the main surface intersects with two side surfaces.
Abstract:
A piezoelectric vibrating piece is provided including: a pair of vibrating arm sections; a base section which is provided between the pair of vibrating arm sections; and connecting sections which connect base end sections of the pair of vibrating arm sections and a base end section of the base section, in which the vibrating arm sections have bending points and the vibrating arm sections extend in a direction away from the base section from the base end sections of the vibrating arm sections to the bending points, and the vibrating arm sections extend along the base section from the bending points to leading end sections of the vibrating arm sections.
Abstract:
There is provided a piezoelectric vibration reed including a pair of vibrating arm portions arranged in parallel to each other and a base portion integrally fixing proximal end portions in the longitudinal direction of the pair of vibrating arm portions, wherein the pair of vibrating arm portions is formed with first groove portions positioned on the side of the proximal end portions of the vibrating arm portions and second groove portions positioned on the side of distal end portions of the vibrating arm portions with respect to the first groove portions on main surfaces, the width of the first groove portions along the width direction orthogonal to the longitudinal direction of the vibrating arm portions on the main surfaces of the vibrating arm portions is formed to be smaller than the second groove portions, and reinforcing ribs projecting from bottom surfaces of the second groove portions are formed in the second groove portions.
Abstract:
There is provided a piezoelectric vibrator including a piezoelectric vibration reed having a pair of vibrating arm portions and a base portion configured to integrally fix proximal end sides of the pair of vibrating arm portions, a base substrate on which the piezoelectric vibration reed is mounted, and a lid substrate joined to the base substrate and configured to accommodate the piezoelectric vibration reed in a cavity defined between the lid substrate and the base substrate, wherein the base substrate is formed with a first engaging portion, and a second engaging portion configured to engage the first engaging portion and guide the piezoelectric vibration reed to a predetermined mount position of the base substrate and position the same is formed on the base portion of the piezoelectric vibration reed.
Abstract:
A piezoelectric vibrating strip includes a pair of vibrating arm portions in parallel with a central axis therebetween, and a base portion integrally cantilevering base end portions of the pair of vibrating arm portions in a length direction. Each of the pair of vibrating arm portions has a first groove portion and a second groove portion in a main face, the first groove portion being placed closer to a leading end portion in the length direction of the vibrating arm portions and having a groove width along a width direction orthogonal to the length direction and a thickness direction of the vibrating arm portion. The second groove portion is closer to the base end portion than the first groove portion and has a groove width along the width direction. The groove width ratio of the second groove portion to the first groove portion is between 0.4 and 1.0.
Abstract:
A piezoelectric vibrating piece, a piezoelectric vibrator, an oscillator, an electronic apparatus and a radio timepiece capable of reducing the size while suppressing reduction of rigidity and having excellent vibration characteristics. The piezoelectric vibrating piece includes a pair of vibrating arm portions in parallel to each other, a base portion integrally fixing base end portions of the pair of vibrating arm portions in a length direction, groove portions on main surfaces of the pair of vibrating arm portions and extending along the length direction, where each of the groove portions includes a first groove portion near a tip portion end of the vibrating arm portions and a second groove portion near the base end portion side of the vibrating arm portions with respect to the first groove portion, and the second groove portion is offset in a −X axis direction with respect to the first groove portion.
Abstract:
The piezoelectric vibrator element is miniaturized, and at the same time, the vibration leakage is suppressed. The piezoelectric vibrator element is formed so that the total length L1 of the piezoelectric vibrator element, the length L2 of the base, the width L3 of the connection part, the length L4 of the support arm part fulfill all of the following conditions A through C, Condition A: 0.1≦L2/L1≦0.2, Condition B: 0.4≦L3/L2≦0.6, Condition C: L4/L1≧0.7. While the miniaturization is realized by shortening the base due to the condition A, the distance via the base can be elongated due to the condition B. Further, by increasing the length of the support arm parts due to the condition C, it is possible to increase the total mass of the path transmitting the vibration to absorb the vibration to thereby further suppress the vibration leakage.
Abstract:
A piezoelectric vibration piece includes: a base portion; a pair of vibration arm portions which extends in a first (+Y) direction from the base portion, and is arranged separately in a second (X) direction intersecting with the first (+Y) direction; and a support arm portion which extends in the first (+Y) direction from the base portion. The support arm portion, includes a first arm portion formed such that a width which is a length along the second (X) direction is gradually narrowed towards a tip end portion side of the support arm portion, and a second arm portion which extends in the first (+Y) direction from the first arm portion and is formed such that the width is broadened towards the tip end portion side.
Abstract:
There is provided a piezoelectric vibrating piece including: a piezoelectric plate that includes a pair of vibrating arm portions, and a base portion which integrally fixes the base end portions of the pair of vibrating arm portions along a length direction; excitation electrodes which are formed on the vibrating arm portions and vibrate the vibrating arm portions; mounting electrodes which are formed on the base portion and mount the piezoelectric plate on external portions using a joining member; and leading-out electrodes which connect the excitation electrodes and the mounting electrodes, in which the leading-out electrodes are formed by folding back several times between the excitation electrodes and the mounting electrodes.
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.