Patent ID: 7913358
Filing Date: 2011-03-29
Classification: H04M,Y10T

Abstract:
1. A hinge assembly for a foldable electronic device, the hinge assembly comprising: a shaft; a first follower attached on one end of the shaft and configured for rotating with the shaft, the first follower having a first follower surface defined at one end thereof; a first cam rotatably attached on the shaft and having a first cam surface defined at one end thereof, the first cam surface engaging with the first follower surface of the first follower to allow the first follower to be slidable and rotatable relative to the first cam; a resilient member having one end abutting the first cam; a second cam rotatably attached on the shaft and abutting the other end of the resilient member, the second cam having a second cam surface defined at one end thereof; a second follower attached on the shaft and having a second follower surface defined at one end thereof, the second follower surface engaging with the second cam surface of the second cam to allow the second follower to be slidable and rotatable relative to the second cam; a main body drive member fixed on the other end of the shaft, wherein one of the main body drive member and the second follower defines a positioning groove in a peripheral wall thereof, the other of the main body drive member and the second follower defines a positioning block in an inner wall thereof, and the positioning block is configured for being receivable in the positioning groove to prevent the second follower from rotating relative to the second cam; and a button attached on the other end of the shaft and abutting the second follower, wherein when the button is pushed, the positioning blocks slides out of the positioning groove so the second follower can rotate relative to the second cam.