Patent ID: 6497163
Filing Date: 2002-12-24
Classification: B62K,B62M,Y10T

Abstract:
A linearly-displacing dual dial rods speed changing controller for dragging a guide wire of a speed changer, said controller comprising:a base; a wire hub seat mounted on said base such that said wire hub seat displaces linearly in a reciprocating manner, said wire hub seat being fastened at one end with the guide wire; an advancing member mounted on said base and formed of an advancing dial rod capable of swiveling between a first position and a second position at the time when said advancing dial rod is exerted on by an external force, thereby actuating said wire hub seat to advance, said advancing dial rod swiveling back to said first position at such time when said advancing dial rod is relieved of the external force exerting thereon; a withdrawing member disposed on said base and formed of a withdrawing dial rod capable of swiveling between a third position and a fourth position at the time when said withdrawing dial rod is exerted on by another external force, thereby linking said wire hub seat to displace in reverse to locate, said withdrawing dial rod capable of swiveling back to said third position at such time when said withdrawing dial rod is relieved of the external force exerting thereon; wherein said base has two parallel guide rails; wherein said wire hub seat is acted on by a first bias force to displace along said two parallel guide rails, said wire hub seat having a first ratchet tooth portion, a second ratchet tooth portion, and a third ratchet tooth portion, with each having a plurality of tooth positions; wherein said advancing member is further formed of an advancing ratchet pawl; wherein said advancing dial rod is pivoted to said base and is acted on by a second bias force, said advancing ratchet pawl being pivoted to said advancing dial rod and being acted on by a third bias force, said advancing ratchet pawl being acted on by said third bias force to engage a tooth position of said first ratchet tooth portion at such time when said advancing dial rod swivels from said first position to said second position, thereby actuating said wire hub seat to overcome said first bias force to advance, said advancing dial rod being caused by said second bias force to swivel back to said first position; wherein said withdrawing member is further formed of a locating ratchet pawl which is pivoted to said base and is acted on by a fourth bias force, said locating ratchet pawl being engaged with a tooth position of said second ratchet tooth portion so as to fix said wire hub seat; wherein said withdrawing dial rod is pivoted to said base and is acted on by a fifth bias force, said withdrawing dial rod forcing said locating ratchet pawl to move away from said tooth position of said second ratchet tooth portion at such time when said withdrawing dial rod swivels from said third position to said fourth position, said withdrawing dial rod having a retaining portion which retains a tooth position of said third ratchet tooth portion, said withdrawing dial rod being acted on by said fifth bias force to swivel back to said third position, said wire hub seat being acted on said first bias force to withdraw in reverse, said locating ratchet pawl being acted on by said fourth bias force to engage once again a next tooth position of said second ratchet tooth portion, so as to fix said wire hub seat; and wherein said base has a front plate, a rear plate, and two parallel guide rails located between said front plate and said rear plate; wherein said wire hub seat is rectangular and is formed of an upper flat plate and a lower flat plate, which hold said two guide rails; wherein said base is provided with a first torsion spring to provide said first bias force.