Actively restorable gear shifting device and gear shifting method using the same

An actively restorable gear shifting device, comprising:

• a gear shifting lever unit configured to be moved from an initial position to an operating position by external operating force and connected to a restoring mechanism to be restored to the initial position when the operating force is eliminated;
• a driving gear connected to the gear shifting lever unit to be rotated by a motion of the gear shifting lever unit;
• and
• a driven gear which engages with an outer tooth portion of the driving gear, connects to a gear shifting cable, and implements gear shifting by pushing or pulling the gear shifting cable by a rotation of the driving gear,
• wherein the gear shifting lever unit connected to the driving gear by a pawl, and the pawl includes a first joining position and a second joining position,
• wherein when the pawl is connected to the driving gear at a first joining position, the driving gear rotates in a first rotation direction by first directional operating force applied to the gear shifting lever unit, the driven gear rotates in a second rotation direction, and the gear shifting cable is pushed, and
• wherein when the pawl is connected to the driving gear at a second joining position, the driving gear rotates in the second rotation direction by second directional operating force applied to the gear shifting lever unit, the driven gear rotates in the first rotation direction, and the gear shifting cable is pulled.