Apparatus provided with a vibration type motor
First Claim
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1. An apparatus that uses a driving force to perform a plurality of types of work, said apparatus comprising:
- a vibration type motor including a vibration member and first and second electro-mechanical energy converting element portions disposed on said vibration member;
a driving circuit that generates first and second frequency signals having different phases and respectively applies the first and second frequency signals to said first and second electro-mechanical energy converting element portions to generate a vibration in said vibration member, thereby generating a driving force of the vibration type motor, said driving circuit being operable in a first mode in which said driving circuit varies the frequencies of the first and second frequency signals applied to said electro-mechanical energy converting element portions to effect driving control, and a second mode in which said driving circuit varies a voltage of the first and second frequency signals applied to said electro-mechanical energy converting element portions to effect driving control; and
a switching circuit that selectively switches the mode of operation of the driving circuit to the first mode or the second mode in accordance with the type of work being performed by said apparatus.
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Abstract
The driving control of a vibration type motor for driving, for example e.g., the drum of a copying apparatus is controlled wherein, in a printing operation, the driving control of the motor is effected by amplitude control, and in the initial operation after the closing of a power source switch (i.e., during the start-up), the driving control of the motor is effected by frequency control, whereby appropriate driving control is effected in accordance with the type of work performed by the apparatus.
30 Citations
16 Claims
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1. An apparatus that uses a driving force to perform a plurality of types of work, said apparatus comprising:
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a vibration type motor including a vibration member and first and second electro-mechanical energy converting element portions disposed on said vibration member; a driving circuit that generates first and second frequency signals having different phases and respectively applies the first and second frequency signals to said first and second electro-mechanical energy converting element portions to generate a vibration in said vibration member, thereby generating a driving force of the vibration type motor, said driving circuit being operable in a first mode in which said driving circuit varies the frequencies of the first and second frequency signals applied to said electro-mechanical energy converting element portions to effect driving control, and a second mode in which said driving circuit varies a voltage of the first and second frequency signals applied to said electro-mechanical energy converting element portions to effect driving control; and a switching circuit that selectively switches the mode of operation of the driving circuit to the first mode or the second mode in accordance with the type of work being performed by said apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus that uses a driving force to perform a plurality of types of work, said apparatus comprising:
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a vibration type motor including a vibration member and first and second electro-mechanical energy converting element portions disposed on said vibration member; a driving circuit that generates first and second frequency signals having different phases and respectively applies the first and second frequency signals to said first and second electro-mechanical energy converting element portions to generate a vibration in said vibration member, thereby generating a driving force of the vibration type motor, said driving circuit being operable in a first mode in which said driving circuit varies the frequencies of the frequency signals applied to said first and second electro-mechanical energy converting element portions to effect driving control, and a second mode in which said driving circuit varies the phase difference between the first and second frequency signals to effect driving control; and a switching circuit that selectively switches the operation mode of said driving circuit to the first mode or the second mode in accordance with the type of work being performed by said apparatus. - View Dependent Claims (14, 15, 16)
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Specification