Operation device
First Claim
1. A surgical operation device comprising:
- an ultrasonic piezoelectric transducer means for generating ultrasonic vibrations;
an oscillation feedback type oscillator means for supplying high-frequency power to the piezoelectric transducer means;
an ultrasonic vibration transmitter means connected to the piezoelectric transducer means for transmitting and amplifying the ultrasonic vibrations generated by the piezoelectric transducer means;
a sucking unit; and
an irrigator;
wherein the piezoelectric transducer means includes a bolted Langevin type transducer;
wherein the oscillation feedback type oscillator means comprises a feedback circuit which includes a PLL and an oscillation voltage detector engaged to an input of said PLL for generating a feedback oscillation signal for input into the oscillation voltage detector, said PLL including a phase comparator, a low pass filter, a differential amplifier, and a voltage controlled oscillator connected in series to produce the feedback oscillation signal, andwherein said oscillation voltage detector includes a motional bridge, a base clipper, a voltage adjuster and an input level converter connected in series for input into said PLL, wherein said motional bridge has a branch including said Langevin type transducer driven by the feedback oscillation signal and a second branch including capacitors.
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Accused Products
Abstract
A surgical operation device comprising an ultrasonic piezoelectric transducer for generating ultrasonic vibrations, an oscillation feedback type oscillator for supplying high-frequency power to the ultrasonic transducer, a vibration transmitter connected to the ultrasonic transducer for transmitting and amplifying mechanical vibrations at an ultrasonic frequency, a suction unit and an irrigator. The ultrasonic transducer includes a bolted Langevin type transducer. The feedback circuit of the oscillation feedback type oscillator includes an oscillation voltage detector, a phase comparator, a low pass filter, a differential amplifier, and a voltage controlled oscillator. Thus, the mechanical resonant frequency can be traced in a wide range of fluctuations of a load on the vibration transmitter during vibration and vibrations can start an appropriate mechanical resonate frequency irrespective of the load status of the vibration transmitter at the start-up.
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Citations
16 Claims
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1. A surgical operation device comprising:
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an ultrasonic piezoelectric transducer means for generating ultrasonic vibrations; an oscillation feedback type oscillator means for supplying high-frequency power to the piezoelectric transducer means; an ultrasonic vibration transmitter means connected to the piezoelectric transducer means for transmitting and amplifying the ultrasonic vibrations generated by the piezoelectric transducer means; a sucking unit; and an irrigator; wherein the piezoelectric transducer means includes a bolted Langevin type transducer; wherein the oscillation feedback type oscillator means comprises a feedback circuit which includes a PLL and an oscillation voltage detector engaged to an input of said PLL for generating a feedback oscillation signal for input into the oscillation voltage detector, said PLL including a phase comparator, a low pass filter, a differential amplifier, and a voltage controlled oscillator connected in series to produce the feedback oscillation signal, and wherein said oscillation voltage detector includes a motional bridge, a base clipper, a voltage adjuster and an input level converter connected in series for input into said PLL, wherein said motional bridge has a branch including said Langevin type transducer driven by the feedback oscillation signal and a second branch including capacitors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A surgical operation device comprising:
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an ultrasonic piezoelectric transducer means for generating ultrasonic vibrations; an oscillation feedback type oscillator means for supplying high-frequency power to the piezoelectric transducer means; an ultrasonic vibration transmitter means connected to the piezoelectric transducer means for transmitting and amplifying the ultrasonic vibrations generated by the piezoelectric transducer means; wherein the piezoelectric transducer means includes a bolted Langevin type transducer; wherein the oscillation feedback type oscillator means includes a feedback circuit which comprises means for widely tracing the ultrasonic vibrations in accordance with load fluctuation and wherein said means for widely tracing includes an oscillation voltage detector, a motional bridge, a base clipper, a voltage adjuster and an input level converter, said motional bridge having a first branch including said Langevin type transducer and a second branch including capacitors.
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16. A surgical operation device comprising:
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an ultrasonic piezoelectric transducer means for generating ultrasonic vibrations; an oscillation feedback type oscillator means for supplying high-frequency power to the piezoelectric transducer means; a vibration transmitter means connected to the piezoelectric transducer means for tnramsitting and amplifying the ultrasonic vibrations generated by the piezoelectric transducer means; wherein the piezoelectric transducer includes a bolted Langevin type transducer; wherein the oscillation feedback type oscillator means includes a feedback circuit which comprises means for providing a stabilized feedback signal irrespective of a state of a load on said piezoelectric transducer means and wherein said means for providing a stabilized feedback signal includes an oscillation voltage detector, a motional bridge, a base clipper, a voltage adjuster and an input level converter, said motional bridge having a first branch including said Langevin type transducer driven by the stabilized feedback signal and a second branch including capacitors.
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Specification