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    • 4. 发明授权
    • Alarm electronic timepiece
    • 报警电子表
    • US4205517A
    • 1980-06-03
    • US907575
    • 1978-05-19
    • Fumikazu MurakamiTakuro Fukuichi
    • Fumikazu MurakamiTakuro Fukuichi
    • G10K15/04G04C21/02G04G13/02G04B13/00
    • G04G13/023
    • An alarm electronic timepiece comprises a time circuit including a time standard signal oscillator for generating a time signal fed to a time display portion for displaying time. An alarm device is driven by an alarm driving circuit to produce an audible alarm sound. An alarm signal compound circuit develops a plurality of signals having different duty cycles and having a frequency in the audible frequency range, and serially arranges the plurality of signals in a predetermined pattern to form an alarm signal composed of the serially arranged signals of different duty cycles which is applied to the alarm driving circuit to produce an audible alarm sound having a predetermined sound pressure variation pattern.
    • 一种报警电子钟表,包括时间电路,包括时间标准信号振荡器,用于产生馈送到时间显示部分以显示时间的时间信号。 报警装置由报警驱动电路驱动,产生声音报警声。 报警信号复合电路产生具有不同占空比并且具有可听频率范围的频率的多个信号,并且以预定模式串联排列多个信号,以形成由不同占空比的串行排列的信号组成的报警信号 其被施加到报警驱动电路以产生具有预定声压变化模式的声音报警声。
    • 5. 发明授权
    • Electronic buzzer
    • 电子蜂鸣器
    • US4023162A
    • 1977-05-10
    • US612538
    • 1975-09-11
    • Fumikazu Murakami
    • Fumikazu Murakami
    • B06B1/02B06B1/06G10K9/122H04R17/10G08B3/10
    • B06B1/0677B06B1/0223G10K9/122H04R17/10
    • An electronic buzzer comprises an acoustic vibrator comprised of a circular metal plate having its entire periphery rigidly secured to a support, and a piezoelectric element adhered to one face of the metal plate. A driving circuit applies electric driving signals to the vibrator to vibrationally drive it at a 1/N multiple of its natural frequency, where N is an integer, so that the vibrator emits an audible buzzing sound. The metal plate is preferably mounted to undergo vibration in a natural vibration mode having only one nodal circle. The drive circuit includes an inductor connected in a closed loop with the vibrator, which functions as a capacitor, and the circuit applies signals at a selectively variable frequency to the closed loop to accordingly vary the inductance of the inductor to thereby vary the period of oscillation of the acoustic vibrator and the resultant frequency of the buzzing sound.
    • 电子蜂鸣器包括由圆形金属板组成的声音振动器,该圆形金属板的整个外周刚性地固定在支撑体上,以及粘附在金属板的一个面上的压电元件。 驱动电路将电驱动信号施加到振动器,以其固有频率的1 / N倍振动地驱动振动器,其中N是整数,使得振动器发出可听到的嗡嗡声。 金属板优选安装成以仅具有一个节圆的固有振动模式进行振动。 该驱动电路包括一个电感器,该闭合回路与振动器连接起来,起着电容器的作用,该电路以一个选择性可变的频率向闭环施加信号,从而改变电感器的电感,从而改变振荡周期 的声音振动器和所产生的嗡嗡声的频率。
    • 10. 发明授权
    • Electrodynamic speaker
    • 电动扬声器
    • US4520237A
    • 1985-05-28
    • US421799
    • 1982-09-23
    • Fumikazu Murakami
    • Fumikazu Murakami
    • H04R9/02H04R1/06H04R9/04H04R9/06H04R31/00
    • H04R31/006H04R1/06H04R9/025
    • In an electrodynamic speaker comprising a vibrating plate, a voice coil secured to the vibrating plate, a magnetic circuit portion having a soft magnetic member and a magnet and having a magnetic gap, a frame for supporting the peripheral portion of the vibrating plate and the magnetic circuit portion, and a lead substrate. The voice coil is secured to the vibrating plate after the vibrating plate is secured to the frame and then the magnetic circuit portion is assembled on the frame. As a result of it, the lead terminal of the voice coil can be connected to the lead substrate through the notch portion of the frame in the same process as mounting the voice coil on the vibrating plate wherey the factor of variation in the magnetic gap dimension which affects the efficiency of the magnetic circuit is reduced.
    • 在包括振动板的电动扬声器中,固定到振动板的音圈,具有软磁性构件和磁体的磁路部分,具有磁隙,用于支撑振动板周边的框架和磁性 电路部分和引线基板。 振动板固定在框架上之后,将音圈固定在振动板上,然后将磁路部分组装在框架上。 作为其结果,音圈的引线端子可以通过框架的切口部分以与将音圈安装在振动板上相同的过程连接到引线基板,其中磁隙尺寸的变化系数 这影响了磁路的效率。