Patent ID: 6045080
Filing Date: 2000-04-04
Classification: G11B

Abstract:
An apparatus for varying the tension of a belt in a portable audio logic deck comprising:a main base;a driving source installed in said main base and having a driving force;a belt connected to said driving source for transferring said driving force;a pulley being wound by the belt and having a rotational axis, said pulley transferring the driving force of said driving source;a main slide slidably disposed in said main base, adapted to be driven by the driving force, and having a linear reciprocating motion generated in response to the transferred driving force;a lever member pivotably installed in said main base and having an end portion connected to the rotational axis of said pulley so that said pulley pivots with said lever member;an elastic member for supporting and biasing said lever member in one direction; anda varying unit attached to an end portion of said main slide and adapted for converting a linear reciprocating motion of said main slide into a pivoting movement of said lever member, said pivoting movement of said lever member causing a change of the tension of the belt wound around said pulley, said varying unit comprising an angled groove formed in said main slide, and a guide protrusion formed on said lever member to selectively engage said angled groove according to the linear reciprocating motion of said main slide.