Patent ID: 7845621
Filing Date: 2010-12-07
Classification: B66F,Y10T

Abstract:
1. A tightener for a binding strap, comprising: a base having two opposite sidewalls, each of which has an axle hole; wherein a rotating axle goes through the axle holes on the two sidewalls, a ratchet is fixed on the rotating axle protruding from one sidewall of the base, a tooth engaging by its inner side with and limiting the ratchet to rotate in a single direction is provided on the sidewall above the ratchet, and the rotating axle in the base has a long cutting groove for the binding strap to go through; and a driving element for rotating the ratchet, the driving element being removably and coaxially mounted on one end of the rotating axle outside the ratchet and adjacent to the ratchet, wherein a ratchet tooth is pivotally disposed on the driving element to engage with the ratchet, a holding part protruding outwardly from the driving element for exertion of force, a cam part disposed on the driving element to push the tooth away from the ratchet, and a blocking part disposed on the driving element and opposite to the holding part for blocking the tooth, wherein the driving element can be removed from the rotating axle, flipped, and coaxially mounted on the rotating axle adjacent to the ratchet with the ratchet tooth being separated from the ratchet by the holding part, after the driving element being flipped the cam part pushes the tooth away from the ratchet when the driving element rotates, wherein a mounting part is disposed between the blocking part and the ratchet tooth, the driving element is coaxially mounted on the rotating axle via the mounting part along the axial direction of the rotating axle.