| 摘要 |
A strap-tightening device includes a frame, a handle connected to the frame and a reel located on the frame. A first detent is located on the frame. A second detent is located on the handle. The second detent includes two horns each including a downward prong and an upward prong. The reel includes a cylinder and two ratcheted wheels attached to the cylinder. The ratcheted wheels are engaged with the upward prongs of the horns of the second detent during pivoting of the handle in a direction to cause the cylinder to reel in a strap. The ratcheted wheels are engaged with the first detent during pivoting of the handle in an opposite direction to prevent the handle from spinning the cylinder to reel out the strap. A withdrawing unit spins the reel to withdraw the strap.
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