Throttle Device

A throttle device, comprising:

• a throttle body including an intake passage therein;
• a throttle valve configured to open and close the intake passage;
• a throttle shaft coupled to the throttle valve;
• a rotation member coupled to the throttle shaft and configured to be rotated by a driving power source;
• and
• a coil spring positioned between the throttle body and the rotation member, wherein the coil spring biases the throttle valve toward a default position, wherein:
• the coil spring includes a first spring part having a first end, a second spring part having a second end, and an intermediate hook connecting the first spring part to the second spring part;
• the first end of the first spring part is held by a first spring locking part on the rotation member;
• the second end of the second spring part is held by a second spring locking part on the throttle body;
• the intermediate hook is configured to engage with a first stopper on the rotation member and a second stopper on the throttle body;
• one of the rotation member and the throttle shaft includes an inner circumferential support part configured to engage and support a radially inner circumferential surface of the first spring part and a radially inner circumferential surface of the second spring part;
• the rotation member includes an outer circumferential support part configured to engage and support a radially outer circumferential surface of the first spring part;
• the intermediate hook includes a first part on the first spring part side and a second part on the second spring part side;
• and
• when the intermediate hook is engaged with the first stopper or the second stopper, the first part of the intermediate hook abuts the first stopper or the second stopper.