초록 ▼

A strap tightener includes a limit nub extending outward from each of the wing plates of the seat. An indent is defined in each of the cams of the side plates to correspond to the limit nub and receive the limit nub when releasing the strap to lock the lever and the seat together to reduce the shear

A strap tightener includes a limit nub extending outward from each of the wing plates of the seat. An indent is defined in each of the cams of the side plates to correspond to the limit nub and receive the limit nub when releasing the strap to lock the lever and the seat together to reduce the shearing force between the lever and the seat and the pivot pin. Consequently, the pivot holes in the seat and the lever do not wear as much and maintain good concentricity.

대표청구항 ▼

1. A strap tightener comprising:a base including two wing plates parallel to each other and a brake pawl with two opposite sides respectively movably mounted in a corresponding wing plate, a stop extending from a free end of the wing plates and a notch defined in the stop; a lever pivotally mounted

1. A strap tightener comprising:a base including two wing plates parallel to each other and a brake pawl with two opposite sides respectively movably mounted in a corresponding wing plate, a stop extending from a free end of the wing plates and a notch defined in the stop; a lever pivotally mounted on the base by a pivot pin, the lever including two side plates parallel to each other, each of the side plates having a cam extending from one end of the side plate corresponding to the base, the pivot pin having two opposite ends respectively extending out of the side plate of the lever and the wing plate of the base, and each having a ratchet wheel and washer sleeved around the pivot pin; the brake pawl being movably mounted between the two wing plates of the base to stop the ratchet wheel when the lever moved back relative to the base; and a pawl movably mounted between the two side plates of the lever to drive the ratchet wheel and the pivot pin when the lever is moved away from relative to the base, the pawl has a top received in the notch of the wing plate when relaxing a strap; wherein the improvement comprises: a limit nub laterally extending out from each of the wing plates and an indent defined in the cam in each of the side plates to receive the limit nub on each of the wing plates when relaxing the strap.