Patent ID: 7628460

Claim:
A wheel type drawer pulling force adjusting apparatus, comprising: a bottom rail, having a latch member protruded from an end of said bottom rail; at least one middle rail, embedded onto said bottom rail, for sliding on said bottom rail reciprocally; an internal rail, embedded onto said middle rail, for sliding on said middle rail reciprocally; a limit member, fixed onto said internal rail, and including a base, symmetric clamping arms extended outward from both lateral sides of said base, an embedding member disposed perpendicularly and respectively on open ends of said clamping arms, and a first plate member horizontally and extended from ends of said embedding members away from said clamping arms; and a turning wheel, fixed onto said internal rail, and installed between said internal rail and said limit member, and an internal side of said turning wheel having a plurality of positioning slots with different internal diameters, and a second plate member disposed under said embedding members passing through a first side of said turning wheel, and leaning against a second side of said turning wheel; thereby, when said apparatus is in use, a level of retracting clamping arms of said limit member depends on the internal diameter of said positioning slots of said turning wheel latched with said embedding member of said limit member, and a tightness of said clamping arms of said limit member clamped on said latch member of said bottom rail latch member is adjustable for allowing a user to apply an appropriate force to open a drawer.