A differential speed device

Abstract

The utility model provides a kind of speed difference device, including shell, main shaft connected in shell, rotating disc for winding tape by being set on main shaft, reset coil spring located in shell and hang ring connected on shell, the shell includes shell body and the shell cover compatible with shell body, the shell cover and the outer edge of shell body are all set with recess, which is correspondingly matched to form wire-passing opening, further including stop falling mechanism, the stop falling mechanism includes fixed shaft connected on rotating disc, pawl rotationally connected on fixed shaft and reset torsion spring matched with pawl, the fixed shaft is set with two groups symmetrically with main shaft, and relative main shaft central axis, is located in main shaft two sides respectively, the pawl is sleeved in the end of fixed shaft towards shell cover, the rotating disc is set with receiving groove for installing reset torsion spring in the end towards shell cover, the shell cover is set with tooth slot matched with pawl correspondingly.The utility model is assembled conveniently, and structure strength is high and production cost is low.

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