Patent ID: 7631397

Claim:
A hinge, comprising: a housing; a sliding cam, slidably received in the housing, defining concave portions on a top surface thereof, the sliding cam defining an axial hole passing therethrough at center; a rotatable cam, mating with the sliding cam, having a base portion which extends downward to form pushing portions, the pushing portions disposed in the concave portions of the sliding cam respectively, the base portion defining an accommodating hole passing therethrough at center; a spring, slidably received in the housing, one end of the spring fixed on the sliding cam, and the other end of the spring fixed at an end of the housing; a shaft, received in the housing, running through the axial hole of the sliding cam and the spring, an end of the shaft received in the accommodating hole of the rotatable cam, and the other end of the shaft passing through the end of the housing; a first stop, having a bottom surface, a part of the bottom surface extending downward to form a blocking portion, a remaining part of the bottom surface defined as a revolving platform, the first stop defines steps including a top step, a bottom step and a middle step disposed between the top step and the bottom step on a top surface thereof, the top step having the receiving cavity formed on a center portion of a top surface thereof; a second stop, rotatably engaging with the rotatable cam at the bottom thereof, having a top surface, the top surface protruding upward to form a pushing block disposed on the revolving platform of the first stop, the pushing block moving to a side of the blocking portion of the first stop and against the blocking portion for driving the first stop rotating; and a cap having a top wall and rotatably receiving the first stop and the second stop, a first mounting portion extending downwardly from a center portion of a bottom surface of the top wall, the first mounting portion being rotatably received in the receiving cavity, the top wall of the care extending downwardly to form a peripheral enclosure, a second mounting portion extending downwardly from the bottom surface of the top wall attaches to an inner surface of the enclosure, the second mounting portion being seated on the middle step.