Laborsaving cam wheel structure

Abstract

Disclosed is a laborsaving cam wheel structure formed of a fixed member and a movable member each having two slopes spirally running in reversed directions on the respective inner side. The slopes of the fixed member are respectively abutted against the slopes of the movable member such that when the movable member is biased relative to the movable member, the peak ends of the slopes of the movable member are moved along the slopes of the fixed member toward the root ends of the slopes of the fixed member.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded view of a laborsaving cam wheel structure according to the present invention.

FIG. 2 is an assembly view of the present invention, showing the laborsaving cam wheel struture in a closed condition.

FIG. 3 is similar to FIG. 2 but showing the laborsaving cam wheel structure in an open condition.

Claims

1. A laborsaving cam wheel structure comprising: a fixed member, said fixed member having a circular center axle hole and two slopes spirally running on an inner side thereof around said circular center axle hole in reversed directions, the slopes of said fixed member each having a peak end and a root end, the peak end of one of the slopes of said fixed member being abutted to the root end of the other of the slopes of said fixed member and defining therewith an elevation difference; anda movable member abutted against the inner side of said fixed member, said movable member having a non-circular center mounting hole, and two slopes spirally running on an inner side thereof around said non-circular center mounting hole in reversed directions and respectively abutted against the slopes of said fixed member, the slopes of said movable member each having a peak end and a root end, the peak end of one of the slopes of said movable member being abutted to the root end of the other of the slopes of said movable member and defining therewith an elevation difference.

2. The laborsaving cam wheel structure as claimed in claim 1, wherein the non-circular center through hole of said movable member is coupled to a shaft member being inserted through the circular center through hole of said fixed member for allowing rotation of said movable member with said shaft member relative to said fixed member.

3. The laborsaving cam wheel structure as claimed in claim 1, wherein said fixed member has a mounting portion extending from the periphery thereof and a connecting member protruded from one side of said mounting portion for fastening to an external body.

4. The laborsaving cam wheel structure as claimed in claim 3, wherein said connecting member is a pin.