Throttle device

A throttle device, comprising:

• a throttle body having an intake passage;
• a throttle valve attached to a throttle shaft configured to rotate the throttle valve to open and close the intake passage;
• a rotor coupled to the throttle shaft and configured to rotate with the throttle shaft;
• and
• a coil spring including a first end and a second end, the first end being connected to the throttle body, the second end being connected to the rotor, wherein:
• the throttle body includes a spring guide having a cylindrical shape and being disposed within the coil spring;
• the spring guide includes a full-close stopper and a full-open stopper that are circumferentially spaced apart by a predetermined gap therebetween;
• the spring guide includes a first side and a second side opposite to the first side;
• the full-close stopper and the full-open stopper are positioned on the first side of the spring guide;
• the coil spring is configured to contact the spring guide on the second side of the spring guide in response to a reaction force of a torsion torque of the coil spring;
• the throttle shaft includes a fully closed opening regulation member comprising a full-close abutment configured to abut the full-close stopper;
• and
• the throttle shaft includes a fully opened opening regulation member comprising a full-open abutment configured to abut the full-open stopper.