Bicycle antitheft control device, shifting device and shifting system

A bicycle antitheft device comprising:

• an antitheft mechanism switchable between an antitheft state and a release state;
• wherein the antitheft mechanism includes:
• a rotatable first member that moves relative to a second member to move the bicycle forward;
• and
• a movement controlling mechanism that hinders the first member from rotating relative to the second member when the antitheft mechanism is in the antitheft state;
• and
• a selection mechanism for selecting one of the antitheft state and the release state;
• wherein the first member comprises a crank axle and wherein the second member comprises a crank case;
• and
• a planetary gear mechanism including a sun gear rotatably supported around the crank axle, a planet gear frame rotatably supported around the crank axle;
• a planet gear rotatably supported on the planet gear frame for engaging the sun gear, and a ring gear that engages the planet gear, and wherein the movement controlling mechanism is disposed between the planet gear frame and the crank case.

A bicycle antitheft device comprising:

• an antitheft mechanism switchable between an antitheft state and a release state;
• wherein the antitheft mechanism includes:
• a rotatable first member that moves relative to a second member to move the bicycle forward;
• and
• a movement controlling mechanism that hinders the first member from rotating relative to the second member when the antitheft mechanism is in the antitheft state;
• and
• a selection mechanism for selecting one of the antitheft state and the release state;
• wherein the first member comprises a crank axle, and wherein the second member comprises a crank case;
• and
• a power transmitting mechanism disposed between the crank axle and the crank case for communicating rotational power from the crank axle to the crank case through a plurality of power transmitting paths.