Patent ID: 7506902

Claim:
An auto-lock mechanism mounted between a body and an upper cover of an image input/output device, automatically locking the upper cover when the image input/output device is slantwise, the auto-lock mechanism comprising: a first swingable element and a second swingable element, swinging relative to each other such that one end of the first swingable element and one end of the second swingable element approach each other to lock the upper cover to the body or part from each other to unlock the upper cover from the body; a first counterbalance and a second counterbalance respectively attached to the first swingable element and the second swingable element, for providing reaction forces for swinging the first swingable element and the second swingable element, respectively; and a first fastener and a second fastener disposed on the first swingable element and the second swingable element, respectively; wherein, when the image input/output device is slantwise, the first swingable element and the second swingable element approach each other, and the first fastener and the second fastener engage with each other such that the upper cover is fixedly locked in place.