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公开(公告)号：US20240305264A1
公开(公告)日：2024-09-12
申请号：US18590917
申请日：2024-02-28
发明人： Tatsuya FUJITA , Yukihiro OKAJIMA
CPC分类号： H03H9/02133 , H03B5/32 , H03H9/02157 , H03H9/0557 , H03H9/1021 , H03H9/19
摘要： A quartz-crystal vibrating piece includes an element unit, excitation electrodes, and an extraction electrode. The element unit includes a vibrator, a first thick portion, and second thick portions. The vibrator has a quadrilateral shape in plan view, vibrates in a thickness-shear mode, and has a thickness t1. The first thick portion has a rectangular shape in plan view, has a short side connected to one side of the vibrator, extends in a first direction, and has a thickness t2 thicker than the thickness t1. The second thick portions are connected to both side surfaces of an end portion of the first thick portion in an opposite side of the vibrator. Each of the second thick portions extends along a second direction intersecting with the first direction and having a thickness t3 thicker than the thickness t1 and same as or different from the thickness t2.
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公开(公告)号：US11824516B2
公开(公告)日：2023-11-21
申请号：US17080860
申请日：2020-10-27
发明人： Kenji Shimao , Tetsuya Watanabe , Koji Toshikawa , Hirokazu Iwata
CPC分类号： H03H9/1021 , H03H3/02 , H03H9/02023 , H03H9/0509 , H03H9/19 , H10N30/02 , H10N30/082 , H10N30/88 , H03H2003/022
摘要： A piezoelectric device includes a container and an AT-cut crystal element. The AT-cut crystal element has at least one side surface intersecting with a Z′-axis of the crystallographic axis of the crystal constituted of three surfaces. The first surface is a surface equivalent to a surface formed by rotating the principal surface by 4°±3.5° with an X-axis of the crystal as a rotation axis. The second surface is a surface equivalent to a surface formed by rotating the principal surface by −57°±5° with the X-axis. The third surface is a surface equivalent to a surface formed by rotating the principal surface by −42°±5° with the X-axis. When two corner portions on a side of a second side opposed to the first side of the AT-cut crystal element are viewed in plan view, each of the two corner portions have an approximately right angle.
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公开(公告)号：US20220385269A1
公开(公告)日：2022-12-01
申请号：US17751670
申请日：2022-05-24
发明人： Kiyoharu MATSUO , Takahiro OHTSUKA
摘要： A crystal unit includes a crystal element, excitation electrodes, and a container. The crystal element vibrates in a thickness-shear mode. The excitation electrodes are disposed on front and back surfaces of the crystal element. The crystal element is mounted to the container. The excitation electrodes are disposed on the crystal element. When a thickness of the crystal element is expressed as T, and a total thickness of the excitation electrodes disposed on the front and back surfaces of the crystal element is expressed as t, a ratio t/T is from 0.026 to 0.030.
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公开(公告)号：US11156571B2
公开(公告)日：2021-10-26
申请号：US16409884
申请日：2019-05-13
发明人： Hiroyuki Kukita , Shunichi Wakamatsu , Tsuyoshi Shiobara , Takayuki Ishikawa , Eiji Miyazaki , Yuta Tsuchiya
IPC分类号： G01N25/08 , G01K11/26 , H03B5/04 , H03B5/32 , G01N5/04 , G01N29/036 , G01N29/44 , G01N29/30 , G01N29/24 , G01N29/02 , G01N29/34
摘要： A substance detection system and a substance detection method are provided. The temperature identifying portion identifies a surface temperature of the quartz substrate, based on a difference between a deviation of the fundamental wave frequency from at least any predetermined reference fundamental wave frequency of the reference crystal resonator and the detecting crystal resonator and a deviation of the third harmonic frequency from a predetermined reference third harmonic frequency. The substance identifying portion identifies a temperature at which a contaminant attached to the detecting crystal resonator is desorbed from the detecting crystal resonator to identify the contaminant based on the temperature at which the contaminant is desorbed. The temperature is identified based on a difference between the fundamental wave frequency of the reference crystal resonator and the fundamental wave frequency of the detecting crystal resonator measured by the frequency measuring portion and the temperature identified by the temperature identifying portion.
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公开(公告)号：US20210100119A1
公开(公告)日：2021-04-01
申请号：US17030406
申请日：2020-09-24
发明人： Tomonori ABE
摘要： A pedestal on which a beveled blank is mounted is provided with a recess portion and an edge portion. The recess portion is provided in a central part of a surface of a pedestal body of the pedestal. The edge portion is adjacent to the recess portion to which the blank is fixed. The recess portion has a length in the short side direction of the pedestal body longer than that of the short side of the blank.
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公开(公告)号：US10931235B2
公开(公告)日：2021-02-23
申请号：US16801191
申请日：2020-02-26
摘要： A sensing sensor includes an oscillator circuit, a base, a connection portion, and a temperature changing unit. The oscillator circuit oscillates the piezoelectric resonator. The base includes a base main body in which a depressed portion is provided and a lid portion at one side, supports the piezoelectric resonator at another side, and is for taking the oscillation frequency to an outside of the sensing sensor. The depressed portion houses the oscillator circuit. The lid portion covers the depressed portion. The connection portion is disposed at the one side of the base and connected to a cooling mechanism for cooling the base from the one side. The temperature changing unit is interposed between the piezoelectric resonator and the base, so as to cool and heat the piezoelectric resonator and transfer a heat radiated for cooling the piezoelectric resonator from the other side of the base to the one side.
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公开(公告)号：US20210036657A1
公开(公告)日：2021-02-04
申请号：US16981706
申请日：2019-03-25
发明人： Tsukasa KOBATA
摘要： In an oscillator device that outputs a frequency signal based on an oscillation frequency of a crystal resonator and a frequency setting value, a frequency difference detector that obtains a difference value corresponding to a frequency difference between the output frequency of the oscillator device and an external clock signal and a temperature detector are disposed. An aging coefficient and a temperature characteristic coefficient are obtained based on a secular change of the difference value obtained in the frequency difference detector and a secular change of the detected temperature during a period where the external clock signal is obtained. Furthermore, a frequency correction value is calculated using the aging coefficient and the temperature characteristic coefficient during a holdover period, and the frequency correction value is added to the frequency setting value.
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公开(公告)号：US10859686B2
公开(公告)日：2020-12-08
申请号：US16136289
申请日：2018-09-20
摘要： An outer case for an ultrasonic probe that houses a module of the ultrasonic probe is provided. The outer case includes a grip case gripped by a user and a head case that engages with the grip case. The grip case has a first engaging portion where one or a plurality of convex portions are disposed. The head case has a second engaging portion where one or a plurality of depressed portions are disposed at positions where the one or plurality of depressed portions engage with the one or plurality of convex portions. The convex portion and the depressed portion are engaged to be locked.
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公开(公告)号：US20200378924A1
公开(公告)日：2020-12-03
申请号：US16882757
申请日：2020-05-26
发明人： Hiroyuki KUKITA , Tsuyoshi SHIOBARA , Yuki YANAGISAWA , Shohei NAKAGAWA , Eiji MIYAZAKI , Yuta TSUCHIYA
IPC分类号： G01N29/02 , G01N29/036 , G01N29/32
摘要： A sensing device that senses a substance to be sensed as a gas by causing a piezoelectric resonator to adsorb the substance to be sensed, includes: a substrate, a thermoelectric element unit, a support plate, and a base portion. A sensing module unit in which a substrate, a thermoelectric element unit, and a support plate are integrated is removably disposed to a base portion that performs at least one of heat supply and heat dissipation to the thermoelectric element unit.
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公开(公告)号：US10819307B2
公开(公告)日：2020-10-27
申请号：US16057834
申请日：2018-08-08
IPC分类号： H03H9/13 , H01L41/332 , H03B5/32 , H01L41/053 , H01L41/047 , H03H9/19 , H03H3/02 , H03H9/17 , H03H9/02
摘要： A crystal unit includes an AT-cut crystal element that has a planar shape in a rectangular shape and a part as a thick portion. The crystal element includes a first end portion, a first depressed portion, the thick portion, a second depressed portion, and a second end portion in an order from a side of one short side in viewing a cross section taken along a longitudinal direction near a center of the short side. The first depressed portion is a depressed portion disposed from the thick portion toward the first end portion side, depressed with a predetermined angle θa and subsequently bulged, and connected to the first end portion. The second depressed portion is a depressed portion disposed from the thick portion toward the second end portion side, depressed with a predetermined angle θb and subsequently bulged, and connected to the second end portion.
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