Screen-taking-up device
AssigneeSM Industrial Company, Limited
InventorDaijiro Nakamura
Life of this patent
Estimating the term…
Abstract
The present invention relates to a screen take-up device characterized in that the output from the normal-reverse turn motor of outer-rotor type contained in a screen take-up shaft is transmitted to the take-up shaft after being reduced in speed; brake is applied by a braking mechanism on the inertia output from the motor in sync with the stopping of the aforementioned motor; the number of revolutions of the take-up shaft is counted by a counter and the motor is controlled to stop at the preset number of revolutions; and the output from the manual shaft which is manually rotated in normal-reverse way is transmitted to the take-up shaft through a self-locking mechanism after being reduced in speed.
Claims5
A screen taking-up device equipped with:
- a normal-reverse turn motor of outer-rotor type which is contained in a cylindrical take-up shaft,
- a motor side reduction mechanism which reduces in speed the output from the aforementioned motor by a planetary gear reduction mechanism and transmits this reduced output to the take-up shaft,
- a braking mechanism for applying brake on the inertial output of this motor in sync with the time when the aformentioned motor is controlled to stop,
- a manual shaft for delivering manual normal-reverse rotation,
- a manual side reduction mechanism for reducing in speed the output from this manual shaft by a planetary gear reduction mechanism and transmitting this reduced output to the aforementioned motor side reduction mechanism,
- a self-locking mechanism interposed between the aforementioned two reduction mechanisms on the motor and the manual sides for transmitting the normal-reverse rotation from the manual shaft to the motor side reduction mechanism, and
- a positioning control mechanism for counting the number of revolutions of the take-up shaft with a counter and controlling the drive of the motor to stop at the preset number of revolutions.
Dependencies are inferred from the claim text.