Patent ID: 8474098
Filing Date: 2013-07-02
Classification: A45C,Y10T

Abstract:
1. An adjustable pulling rod set comprising: a pulling handle, two pulling rods extending from the handle and being parallel to each other, a switch, a base and a cover, the two pulling rods slidably passing through two respective openings formed in the cover; the cover mounted to the base and defining a space therebetween; the switch mounted on the base within said space, the switch comprising: an operating component, two positioning rods and a spring, said operating component having a button protruding from an upper side of the operating component, two slice bodies extending downwardly from a bottom side of the operating component and being parallel to each other, thereby defining a rail between the two slice bodies, each of said slice bodies having a downward-opening gap, the width of each gap gradually increased from the top to the bottom of each gap, thereby defining two opposite diverging cam surfaces on each slice body, two feet inwardly protruding from the bottom of each slice body and facing each other; each of said positioning rods having an abutting nodes defined on one end thereof, the two abutting nodes of the two positioning rods being slidable along the rail respectively and assembled into the rail, each abutting node having two wings defining two oblique surfaces to slidably engage the respective cam surfaces from said two slice bodies, the two feet avoiding the two wings coming off the rail, each said positioning rod further having a fixing part protruding from an opposite end, adapted to selectively engage one of a plurality of positioning holes formed in the respective pulling rod, said spring having two opposite ends, both ends of the spring abutting against the two abutting nodes of the two positioning rods respectively and biasing the positioning rods away from each other to retain the fixing parts in engagement with the respective positioning holes; and the cover having a button hole opened on the cover corresponding to the button, the button protruding and passing through the button hole; wherein when the button is pressed downward, the two wings of each positioning rod are forced by the cam surfaces such that the two positioning rods simultaneously compress the spring and the fixing parts of the two positioning rods are detaching from the pulling rods; when the button is released, the two fixing parts of the two positioning rods can be placed and fixed into the pulling rod again by the elastic force generated from the spring.