Photo film transporting device
AssigneesFuji Photo Film Co., Ltd., Fuji Photo Optical Co., Ltd.
InventorsWataru Sasaki, Tatsuo Saito
Life of this patent
Estimating the term…
Abstract
An electric current is supplied from a power source to a motor for transporting a film through a switching element (a transistor). A regenerate current is generated from the motor when the current supply is cut, and the regenerate current is returned to the motor through a switching element (a first MOS FET). The switching elements are turned on and off according to the state of a second MOS FET. When the second MOS FET is turned on, the transistor is turned on and the first MOS FET is turned off, and this drives the motor. When the second MOS FET is turned off, the transistor is turned off and the first MOS FET is turned on, and this stops the motor.
Claims7
A photo film transporting device that drives a motor to transport a photo film, the photo film transporting device comprising:
- a first switching device that forms an electric current supply route for supplying an electric current from a power source to the motor when a voltage of a control terminal of the first switching device is a first voltage, the first switching device cutting the electric current supply route when the voltage of the control terminal of the first switching device is a second voltage;
- a second switching device that forms a loop for returning a regenerate current generated from the motor to the motor when the voltage of a control terminal of the second switching device is the second voltage, the second switching device cutting the loop when the voltage of the control terminal of the second switching device is the first voltage;
- and
- a voltage switching device that switches a voltage of a common terminal connected to the control terminals of the first switching device and the second switching device between the first voltage and the second voltage, wherein:
- the first switching device forms the electric current supply route and the second switching device cuts the loop to drive the motor when the voltage switching device sets the first voltage;
- and
- the first switching device cuts the electric current supply route and the second switching device forms the loop to stop the motor when the voltage switching device sets the second voltage.
Dependencies are inferred from the claim text.