Complex mass trajectories for improved haptic effect
First Claim
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1. A haptic actuator comprising:
- a first Evans mechanism, said first Evans mechanism being adapted and configured to describe a first linear trajectory portion and a second arcuate trajectory portion;
a second Evans mechanism, said second Evans mechanism being adapted and configured to describe a third linear trajectory portion and a fourth arcuate trajectory portion; and
a ground member, said ground member including first and second sarrus hinges, said ground member being mutually coupled to said first Evans mechanism and to said second Evans mechanism such that said first and second Evans mechanisms are adapted and configured to move substantially in opposition to one another through said first and third linear trajectory portions respectively to produce a desirable haptic signal of said haptic actuator.
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Abstract
A haptic actuator includes mechanical links defining a first J-trajectory and mechanical links defining a second J-trajectory as well as a motor coupled to the mechanical links so as to synchronously accelerate a first mass over the first J-trajectory and a second mass over the second J-trajectory. During a first time interval, reactive forces of the first mass accelerating substantially balance reactive forces of the second mass accelerating and during a second time interval reactive forces of the first mass accelerating do not substantially balance reactive forces of the second mass accelerating. This un-balanced condition results in a tap signal being produced.
27 Citations
9 Claims
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1. A haptic actuator comprising:
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a first Evans mechanism, said first Evans mechanism being adapted and configured to describe a first linear trajectory portion and a second arcuate trajectory portion; a second Evans mechanism, said second Evans mechanism being adapted and configured to describe a third linear trajectory portion and a fourth arcuate trajectory portion; and a ground member, said ground member including first and second sarrus hinges, said ground member being mutually coupled to said first Evans mechanism and to said second Evans mechanism such that said first and second Evans mechanisms are adapted and configured to move substantially in opposition to one another through said first and third linear trajectory portions respectively to produce a desirable haptic signal of said haptic actuator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification