Tying device

A tying device comprising:

• a seat body having two opposite sidewalls each of which is formed with a shaft hole for a shaft to pass therethrough, the shaft being formed with a slot for a tying belt to pass through, one end of the shaft being formed with a flange on an outer side of one sidewall of the seat body;
• a driving member pivotally connected with the end of the shaft;
• a ratchet wheel fixed with the shaft between the driving member and the one sidewall of the seat body, a rock arm radially extending outward from the driving member, a free end of the rock arm being pivotally connected with an engaging block, a cam section radially projecting from the driving member opposite to the rock arm, the cam section being slightly larger than the outer diameter of the ratchet wheel, the cam section having an outwardly projecting stopper block;
• and
• a detent member pivotally disposed on the sidewall of the seat body above the ratchet wheel, the detent member being engageable with the ratchet wheel, the detent member having a thickness larger than the thickness of the ratchet wheel, whereby an edge of the cam section can push the detent member to swing upward.