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US 5,008,605 AGranted
Electric driving device capable of eliminating backlash
AssigneeCanon Kabushiki Kaisha
InventorsTsunemasa Ohara, Tomoo Shibanai
Life of this patent
Estimating the term…
Abstract
A mechanism such as a camera has an electric driving device being capable of eliminating backlash, is equipped with an electric driving unit, an actuation unit driven by the driving force of the electric driving unit, a gear train for transmitting the driving force of the electric driving unit to the actuating unit, and a control unit for power supply to the electric driving unit for eliminating the backlash generated in the gear train.
Claims16
An electric driving device capable of eliminating backlash, comprising:
- (a) electric drive means for generating a driving force;
- (b) actuator means to be activated by the driving force of said electric drive means;
- (c) gear means for transmitting the driving force of said electric drive means to said actuator means;
- and
- (d) control means for supplying electric power to said electric drive means to eliminate backlash generated in said gear means, the electric power being supplied at a first power level during an initial period when said electric drive means is started and being supplied at a second power level lower than said first power level subsequent to said initial period, wherein both the first level and the second level are lower than the driving power level supplied to said electric drive means for actuating said actuator means.
2 more elements
A driving device capable of backlash elimination, comprising:
- (a) drive means for generating a driving force;
- (b) actuator means to be actuated by the driving force of said drive means;
- (c) transmitting means for transmitting the driving force of said drive means to said actuator means;
- and
- (d) control means for supplying power to said drive means to eliminate backlash of said transmitting means by operation of said drive means, the power being supplied at a first power level during an initial period of the starting operation of said drive means and a second power level lower than the first power level after said initial period, both the first and second power levels being lower than a power level which is supplied to said drive means when said drive means drives said actuator means.
2 more elements
Dependencies are inferred from the claim text.