Trigger assembly including a flexible bend sensor
First Claim
Patent Images
1. A variable control trigger for a power tool, comprising:
- a flexible sensor having an electrical resistance that varies based on a radius of curvature of the flexible sensor; and
a trigger connected to the power tool, the trigger operating to mechanically apply a bending force at an engagement point on the flexible sensor to bend the flexible sensor and alter the radius of curvature.
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Abstract
A flexible sensor is disposed in a power tool. The flexible sensor has an electrical resistance that varies based on a radius of curvature of the flexible sensor. A trigger partially disposed in the power tool, operates to apply a bending force at an engagement point on the flexible sensor to bend the flexible sensor and alter the radius of curvature. A controller outputs an electrical signal to the power tool based on the electrical resistance to control a function of the power tool.
34 Citations
18 Claims
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1. A variable control trigger for a power tool, comprising:
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a flexible sensor having an electrical resistance that varies based on a radius of curvature of the flexible sensor; and a trigger connected to the power tool, the trigger operating to mechanically apply a bending force at an engagement point on the flexible sensor to bend the flexible sensor and alter the radius of curvature. - View Dependent Claims (2, 3, 4, 5, 6, 18)
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7. A variable output trigger for a power tool, comprising:
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a flexible sensor having a variable electrical resistance based on a bending force applied to the flexible sensor; and a trigger connected to said power tool operating to mechanically apply the bending force at an engagement point on the flexible sensor. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A variable output trigger for a power tool comprising:
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a flexible sensor creating a variable electrical resistance based on a deflection of the flexible sensor at an engagement point; and a trigger connected to said power tool operating to mechanically apply a bending force to the flexible sensor at the engagement point.
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14. A method for operating a variable trigger of a power tool, the variable trigger assembly including a flexible sensor and a trigger, the method comprising:
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applying a force to the trigger connected to said power tool operating to engage the flexible sensor and mechanically transfer the force to the flexible sensor at an engagement point to alter a radius of curvature of the flexible sensor; and varying an electrical resistance of the flexible sensor based on the radius of curvature of the flexible sensor. - View Dependent Claims (15, 16, 17)
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Specification