Patent ID: 6837811
Filing Date: 2005-01-04
Classification: A63B

Abstract:
1. A string pulling device, comprising: a base; a rotation unit including a support block mounted on the base, a shaft rotatably mounted in the support block, a rotation disk secured on a first end of the shaft to rotate therewith, and a gear secured on a second end of the shaft to rotate the shaft; and a drive unit including a positioning block mounted on the base, a side plate mounted on the positioning block, a motor mounted on the side plate, a threaded rod rotatably mounted on the side plate and having a first end connected to and rotated by the motor, a movable block movably mounted on the positioning block and mounted on a second end of the threaded rod to move on the threaded rod by rotation of the threaded rod, and a rack having an end secured on the movable block to move therewith and meshing with the gear of the rotation unit to rotate the gear of the rotation unit.