Voluntary opening prehension device

摘要

A voluntary opening prehension device is constructed with a pivot member having a pair of fingers mounted thereon and extending distally from the pivot member. The fingers may be pivoted individually or simultaneously so as to selectively separate or converge at their distal ends. An electric motor is used to separate the fingers. A closing mechanism biases the fingers into contact with each other when the motor is not in operation. A battery supplies electrical power to the motor. A field effect transistor driver serves as a switch for actuating the electric motor when it is supplied with a myopulse of a specified threshold strength or greater. This reduces the amount of electrical power utilized to operate the device since the motor is actuated only when a clear signal is sent from the user. A control mechanism supplies the myopulse to the field effect transistor driver in response to a myoelectric signal generated by the user.