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    • 5. 发明专利
    • PIEZOELECTRIC ELECTROACOUSTIC CONVERTER
    • JPS626596A
    • 1987-01-13
    • JP14557185
    • 1985-07-02
    • MATSUSHITA ELECTRIC IND CO LTD
    • KOBAYASHI TERUO
    • H04R17/00
    • PURPOSE:To accurately fix the circumference of a piezoelectric oscillator by forming a front case and a back case by a thermoplastic resin, having a ring shape protrusion supporting and fixing the circumference of the piezoelectric oscillator, providing a cylindrical protrusion and a melting margin at the outermost peripheral part of one case and bonding both the cases by an ultrasonic vibration. CONSTITUTION:A piezoelectric oscillator 2 is constituted by bonding a ceramic piezoelectric member to a metal diaphragm 4 and respective electrodes and terminals 11, 11' connected by lead wires. For the front case 1, ABS, polycarbonate, polypropylene or the like is used. On the front case 1, a sound emitting hole 5, a ring shape protrusion 6, and a cylindrical protrusion 7 are formed. Between the piezoelectric oscillator 2 and the front case 1, a front air chamber 9 is formed. For the back case 13, a thermoplastic resin same as the front case 1 is used. On the back case, a leakage hole 12, a ring shape protrusion 6' and a cylindrical protrusion 7' are formed, and between the back case and the piezoelectric oscillator 2, a back air chamber is formed. To the back case, the terminals 11, 11' are fixed. The front case 1 and the back case 13 are bonded by applying an ultrasonic oscillation.
    • 6. 发明专利
    • Manufacture of piezoelectric vibrator
    • 压电振动器的制造
    • JPS6192100A
    • 1986-05-10
    • JP21392984
    • 1984-10-11
    • Matsushita Electric Ind Co Ltd
    • KOBAYASHI TERUO
    • H04R31/00G10K9/122H04R17/00H04R17/10
    • G10K9/122
    • PURPOSE:To form easily a piezoelectric vibrator having a free resonance frequency by bonding and fixing the ceramic piezoelectric body and the metallic plate, which are different in the thermal expansion coefficient, at the temperature which is different from room temperature. CONSTITUTION:Heaters 6 and 7 at the upper side part 1 and the lower side part 2 of the bonding jig are respectively built in the lower side part 2. At the external part of the upper side part 1 and the lower side part 2 of the bonding jig, heaters to heat atmosphere are installed. Thus, when a ceramic piezoelectric body and a metallic plate are bonded at the temperature different from room temperature by the assembly with different thermal expansion coefficient, the resonance frequency in the room temperature can be freely selected. By selecting suitably the temperature at the time of bonding, the resonance frequency can be changed.
    • 目的:通过在不同于室温的温度下将陶瓷压电体和热膨胀系数不同的陶瓷压电体和金属板接合固定,容易地形成具有自由共振频率的压电振动器。 构成:接合夹具的上侧部分1和下侧部分2的加热器6和7分别内置在下侧部分2中。在上侧部分1的外部部分和下侧部分2 粘合夹具,加热器到加热气氛。 因此,当陶瓷压电体和金属板通过具有不同热膨胀系数的组件在不同于室温的温度下接合时,可以自由地选择室温下的共振频率。 通过适当选择接合时的温度,可以改变谐振频率。
    • 8. 发明专利
    • PIEZOELECTRIC ELECTROACOUSTIC TRANSDUCER
    • JPS60260298A
    • 1985-12-23
    • JP11702484
    • 1984-06-07
    • MATSUSHITA ELECTRIC IND CO LTD
    • KOBAYASHI TERUOKAWASAKI KOUZOU
    • H04R17/00H04R1/22
    • PURPOSE:To simplify the assembling and to reduce the number of components by pressing a load of the vibrator and an input/output terminal fixed to a back air chamber board while using a convexed part of the front air chamber board and the concaved part of the back air chamber for fitting. CONSTITUTION:A notch 28 is provided to a part of the diaphragm 27 at a position to which a projection 24 from the front air chamber board 21 is inserted. A lead 29 is soldered to one electrode of a ceramic piezoelectric body 26 and positioned to pass the apex of the projection 24 of the chamber board 21 at assembling. The back air chamber board 30 has a step 31 at the peripheral and the concaved part 32 is formed to a part of the step 31. Further, terminals 33, 34 are fixed to the chamber board 30, a part of the terminal 33 reaches the concaved part along the air inner face of the chamber board 30 and connected electrically with the lead 29. The connection is executed by the pressing by means of fitting between the projection 24 of the board 21 and the concaved part 32 of the board 30.