초록 ▼

Provided is an automatic tightening device with rolling and unrolling control functions. A handle, a base, and a spool are pivotally connected together by a reel having an associated relationship with the spool and provided with a coil spring driving structure at an end. The handle and the base each

Provided is an automatic tightening device with rolling and unrolling control functions. A handle, a base, and a spool are pivotally connected together by a reel having an associated relationship with the spool and provided with a coil spring driving structure at an end. The handle and the base each has two parallel sidewalls. A movable pawl/stop pawl is mounted between the sidewalls of the handle/base. The two pawls can be in contact with any tooth around ratchet wheel sheets. A no-load webbing unrolling-rolling-stopping region, a safe lock position, a tightening operation region, and a load releasing region are provided at an edge of the base. The no-load webbing unrolling-rolling-stopping regions at the edges of the base are inclined surfaces, end surfaces of the stop and movable pawls are chamfers, and a no-load releasing cam rim and a load releasing cam rim are provided at an edge of the handle.

대표청구항 ▼

1. An automatic tightening device with rolling and unrolling control functions, comprising: a base and a handle being pivotally connected together by a mandrel, wherein the mandrel is connected with a spool and a coil spring, the spool having an associated relationship with a left ratchet wheel and

1. An automatic tightening device with rolling and unrolling control functions, comprising: a base and a handle being pivotally connected together by a mandrel, wherein the mandrel is connected with a spool and a coil spring, the spool having an associated relationship with a left ratchet wheel and a right ratchet wheel and being riveted with the left ratchet wheel and the right ratchet wheel through a roller, the spool being configured for rolling a long webbing; wherein the base has two parallel sidewalls, and a short webbing fixing shaft and a long webbing guide shaft provided between the two parallel sidewalls of the base;wherein the handle has two parallel sidewalls;wherein a no-load webbing unrolling-rolling-stopping region, a safe lock position, a tightening operation region, and a load releasing region are provided at an edge of each of the two sidewalls of the base; a stop pawl in flexible contact with the spool is mounted between the two sidewalls of the base and a movable pawl in flexible contact with the spool is provided between the two sidewalls of the handle, wherein the movable pawl is sheathed with a plastic sheath facilitating an operation by an operator, the stop pawl and the movable pawl having respective end surfaces configured to abut any teeth located at peripheries of the left and right ratchet wheels; wherein each no-load webbing unrolling-rolling-stopping region comprises a sliding groove which is formed at the edge of a respective sidewall of the base and configured to limit the range of movement of the stop pawl that drives the left and right ratchet wheels, and a locking groove in which the stop pawl is not allowed to swing; wherein the locking groove is located at the safe lock position formed at the edge of a respective sidewall of the base and configured to limit the range of movement of a movable pawl, wherein when the movable pawl is in the locking groove, the stop pawl is not able to swing; wherein a load releasing cam rim and a no-load releasing cam rim are provided at an edge of the handle, respectively; wherein when the handle is closed and there is no load on the base, the edges of the sidewalls of the handle and the edges of the sidewalls of the base form two cam rims which simultaneously push the stop pawl and the movable pawl to open, respectively; wherein in a load state where the handle is opened to form an angle with the base, the edges of the sidewalls of the handle and the edges of the sidewalls of the base form another two cam rims which push the stop pawl and the movable pawl to open, respectively; wherein the no-load webbing unrolling-rolling-stopping regions at the edges of the sidewalls of the base are inclined surfaces, and the end surfaces of the movable pawl cooperate with the inclined surfaces of the webbing unrolling-rolling-stopping regions of the base to form a first component force; wherein at the same time, the end surfaces of the stop pawl cooperate with inclined surfaces of the load releasing cam rims in the handle to form a second component force; wherein under action of the first and second component forces, the movable pawl and the stop pawl are pushed to bottommost portions of the no-load webbing unrolling-rolling-stopping regions, and the stop pawl and the movable pawl are in contact with edges of the left and right ratchet wheels, so as to create an effect of stopping automatic webbing rolling of the spool; and wherein when the handle is pressed down, the movable pawl and the stop pawl slide to topmost portions of the no-load webbing unrolling-rolling-stopping regions by being guided by the inclined surfaces of the webbing unrolling-rolling-stopping regions of the base and by the inclined surfaces of the load releasing cam rims in the handle, respectively, the movable pawl and the stop pawl are separated from the edges of the left and right ratchet wheels, and the spool automatically rolls up the webbing by driving of the coil spring. 2. The automatic tightening device with rolling and unrolling control functions according to claim 1, wherein the movable pawl is locked in the locking groove, and at this time, the stop pawl is located at the bottommost portions of the left and right ratchet wheels so as to serve safe strapping function. 3. The automatic tightening device with rolling and unrolling control functions according to claim 1, wherein a rolling and unrolling mechanism which has an associated relationship with the spool is mounted outside the base. 4. The automatic tightening device with rolling and unrolling control functions according to claim 1, wherein the spool covers outside the mandrel for rolling or unrolling the long webbing, wherein the spool and the mandrel form a rolling component and the spool has the left and right ratchet wheels riveted together by the roller, and wherein the mandrel is configured to drive the spool to roll together to form the rolling component. 5. The automatic tightening device with rolling and unrolling control functions according to claim 3, wherein the rolling and unrolling mechanism comprises a coil spring and a coil spring box.