Patent ID: 6533687
Filing Date: 2003-03-18
Classification: A63B

Abstract:
A string clip positioning device of a racket string stretcher, comprising a slide seat, a pusher, a positioning member, and a track, wherein:the track is formed with an elongated guide slot; the slide seat is mounted on a top of the track, and has a first end formed with an insertion hole and a second end provided with a seat tube which has an upper portion formed with a mounting section and a lower portion formed with a receiving section communicating with the mounting section, the slide seat is formed with a chamber communicating with the insertion hole and the receiving section of the seat tube; the positioning member is mounted on the first end of the slide seat, and includes a cap received in the insertion hole of the slide seat, and a clamping block mounted on a bottom of the track, the cap of the positioning member has an outer wall formed with a tapered bearing face, and has a bottom end provided with an insertion block received in the guide slot of the slide seat, the clamping block of the positioning member has a top end provided with a connecting block received in the guide slot of the slide seat; a support shaft is pivotally mounted in the mounting section of the seat tube of the slide seat, and has a bottom formed with an annular flange which is rested on a top face of the receiving section of the seat tube of the slide seat; a string clip is mounted on the support shaft, and includes a press handle, and a link pivotally connected with the pusher, so that the support shaft and the positioning member may be operated synchronously, so as to stop and position the string clip; the pusher includes a push shaft movably mounted in the support shaft, the push shaft of the pusher has a top end pivotally connected with a first end of the link which has a second end pivotally connected with the press handle of the string clip, so that the push shaft of the pusher may be moved by the link which is moved by the press handle, the pusher includes a push block secured on a bottom end of the push shaft; a follower is mounted in the chamber of the slide seat, and includes a bearing wheel, a wheel seat, an adjusting threaded rod, and a drive block, wherein: the bearing wheel of the follower is rotatably mounted on a first end of the wheel seat of the follower and partially extended into the receiving section of the seat tube of the slide seat; the drive block of the follower has a first end rested on a second end of the wheel seat of the follower, and a second end formed with a tapered drive end that may contact the bearing face of the cap of the positioning member; and the adjusting threaded rod of the follower is screwed into the drive end of the drive block of the follower, and has a first end rested on the second end of the wheel seat of the follower.