Patent ID: 8231074

Claim:
A lace winding device comprising: a base; a spool rotatably mounted in the base; a lace having two distal ends each extending through the base and each secured on the spool to move in concert with the spool; a limit barrel mounted on the base; a drive member rotatably mounted in the limit barrel and connected with the spool to drive and rotate the spool; a ratchet block movably mounted on the limit barrel and engaging the drive member to limit the drive member to rotate in a oneway manner; and an elastic member mounted on the limit barrel and abutting the ratchet block to press the ratchet block toward the limit barrel, wherein the base has an inner portion formed with a receiving chamber to receive the spool and has a peripheral wall formed with two passages each connected to the receiving chamber to allow passage of each of the two distal ends of the lace; the spool is rotatably mounted in the receiving chamber of the base and is disposed between the base and an end cap; the spool has an outer wall formed with a recessed winding zone connected to the receiving chamber of the base to wind and unwind the lace by rotation of the spool; the spool has an inner wall formed with a plurality of keyways; the lace is mounted in the winding zone of the spool; the limit barrel has an inner portion formed with a receiving space to receive the drive member and has a peripheral wall formed with a receiving recess connected to the receiving space to receive the ratchet block; the ratchet block is movably mounted in the receiving recess of the limit barrel and has a distal end provided with an oblique locking detent extending into the receiving space of the limit barrel and engaging the drive member; the drive member is rotatably mounted in the receiving space of the limit barrel and is disposed between the limit barrel and the base; the drive member has a mediate portion provided with a ratchet wheel engaging the locking detent of the ratchet block; the ratchet wheel of the drive member is limited by the locking detent of the ratchet block so that the ratchet wheel of the drive member is rotatable in the receiving space of the limit barrel in one direction only; the drive member has a first side provided with a plurality of keys engaging the keyways of the spool; the drive member has a second side provided with a shaft protruding outward from the limit barrel; and the elastic member presses the locking detent of the ratchet block toward the ratchet wheel of the drive member.