Patent ID: 7546667

Claim:
A latch-type tightening device structure comprising a body which is constituted by a seat and a housing, and is provided with a one-way braking mechanism to enable a rope to glide in one direction, wherein the rope enters into the tightening device to reeve around the one-way braking mechanism which enables the rope to glide in one direction, and a front edge of the body is provided with a tenon, such that the tightening device can be quickly locked with a fitting part in application, an interior of the body is provided with two rollers, one turntable, one wheel, and one lock bolt, wherein an access is located at a rear end of the seat with two sides of the access being provided with a screw hole respectively, two rollers are latched at two sides of the access, an indentation is located at a central position in an interior of the seat with a hole in a center of the indentation, a central column is latched into the hole for positioning, and a projection piece is located a front end of the seat with two sides of a root part of the projection piece provided with a through-hole respectively; an access is located at a rear end of the housing with a bore located at a periphery of the access, an indentation is located at a central position in an interior of the housing, a hole is located at a center of the indentation, a through-hole is located on the housing, and a slot hole is located at a front end of the housing; a through-hole is located at a center of the turntable, a positioning hole is located at a side of the through-hole, and ridges, which are radially extended, are located at a periphery of the through-hole; a hollow part is located at a top surface of the turntable, one-way ratchets are located at a periphery of the hollow part, a central column having a through-hole and radially extending ridges are located at a bottom surface, and a column head is located at a side of the central column; a depressing piece and a tenon are located at two sides of the lock bolt respectively, a bore is located at a top end of the lock bolt, a hole is located on the tenon with an end of a spring inserted in the hole, and the other end of the spring is hooked on the positioning column of the housing, the depressing piece is pressed against the one-way ratchets of turntable, a latching plane is located on an exterior wall at a top end of the lock bolt, and the lock bolt being rotated by a connection and control of a knob; the housing being covered on the seat, and screws being used to assemble the two casings from a bottom to a top, so as to form an integral body, a rope entering from a side of the access at a bottom of the tightening device and reeved on the turntable and wheel, followed by passing out from another side of the access.