Actuator device for a bicycle gearshift and nut for such a device
First Claim
1. Actuator device for a bicycle gearshift, comprising:
- an actuation kinematic mechanism adapted to be articulated in order to move a derailleur of the gearshift;
a driving member adapted to control the articulation of the actuation kinematic mechanism, the driving member comprising a motor and a threaded drive shaft put in rotation by the motor;
a nut associated with the actuation kinematic mechanism and with the drive shaft so that, in a first operative configuration of the actuator device, the nut is in an engaged condition with the drive shaft such that the rotation of the drive shaft causes the articulation of the actuation kinematic mechanism;
wherein said actuator device further comprises a biased snap mechanism that holds the nut in said engaged condition under a predetermined threshold biasing force, and releases the nut such that the nut is drivingly disengaged from the drive shaft after said actuator device is subjected to a second force that overcomes the predetermined threshold biasing force and rotation of the drive shaft does not cause the articulation of the actuation kinematic mechanism.
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Accused Products
Abstract
An actuator device for a bicycle gearshift, comprising an actuation kinematic mechanism adapted to be deformed in order to move a derailleur of the gearshift; a driving member adapted to control the deformation of the aforementioned kinematic mechanism, the driving member comprising a motor and a threaded drive shaft put in rotation by the motor; a nut associated with the aforementioned kinematic mechanism and with the drive shaft. The actuator device comprises a snap mechanism that, in a first operative configuration, holds the nut in an engaged condition with the drive shaft such that the rotation of the drive shaft causes the deformation of the actuation kinematic mechanism and that, when the actuator device is subjected to a force greater than a predetermined threshold force, defines a release configuration in the nut, such that the rotation of the drive shaft does not cause the deformation of the actuation kinematic mechanism.
15 Citations
34 Claims
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1. Actuator device for a bicycle gearshift, comprising:
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an actuation kinematic mechanism adapted to be articulated in order to move a derailleur of the gearshift; a driving member adapted to control the articulation of the actuation kinematic mechanism, the driving member comprising a motor and a threaded drive shaft put in rotation by the motor; a nut associated with the actuation kinematic mechanism and with the drive shaft so that, in a first operative configuration of the actuator device, the nut is in an engaged condition with the drive shaft such that the rotation of the drive shaft causes the articulation of the actuation kinematic mechanism; wherein said actuator device further comprises a biased snap mechanism that holds the nut in said engaged condition under a predetermined threshold biasing force, and releases the nut such that the nut is drivingly disengaged from the drive shaft after said actuator device is subjected to a second force that overcomes the predetermined threshold biasing force and rotation of the drive shaft does not cause the articulation of the actuation kinematic mechanism. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. Actuator device for a bicycle gearshift, comprising:
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an articulating actuation kinematic mechanism that moves a derailleur of the gearshift;
a driving member that includes a motor and a threaded drive shaft that is rotated by the motor and controls the actuation kinematic mechanism;a nut that is associated with the actuation kinematic mechanism and includes a biased snap mechanism having an engaged condition that holds the nut in engagement with the drive shaft so that rotation of the drive shaft causes articulation of the actuation kinematic mechanism, and, after the actuator device is subjected to a force greater than a predetermined threshold biasing force, the nut releases and is drivingly disengaged from the drive shaft where rotation of the drive shaft does not cause articulation of the actuation kinematic mechanism.
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34. Actuator device for a bicycle gearshift, comprising:
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an actuation kinematic mechanism adapted to be articulated in order to move a derailleur of the gearshift; a driving member adapted to control the articulation of the actuation kinematic mechanism, the driving member comprising a motor and a threaded drive shaft put in rotation by the motor, the threaded drive shaft extending along and rotating about a first longitudinal axis; a nut associated with the actuation kinematic mechanism and with the drive shaft so that, in a first operative configuration of the actuator device, the nut is in an engaged condition with the drive shaft such that the rotation of the drive shaft causes the articulation of the actuation kinematic mechanism, the nut extending along a second longitudinal axis that is perpendicular to the first longitudinal axis of the threaded drive shaft; wherein said actuator device comprises a snap mechanism that, in said first operative configuration of the actuator device, holds the nut in said engaged condition and that, when the actuator device is subjected to a force greater than a predetermined threshold force, defines a release configuration in the nut wherein the actuation kinematic mechanism is completely released from the drive shaft such that the rotation of the drive shaft does not cause the articulation of the actuation kinematic mechanism.
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Specification