Patent ID: 7311342

Claim:
A lock device comprising an external cylinder body, a latch unit, a screw part and an inner lock body that are combined together, wherein the inner lock body has an inner cover plate set, a washer plate, a spring, a spring plate, an inner connecting plate and an inner lever handle, wherein a pair of opposite openings is located at a periphery of the inner cover plate set, wherein an inner drive cylinder is configured on the inner cover plate set, characterized in that: a periphery of the washer plate forms two opposite wave pawl parts, and each of the two opposite wave pawl parts is of an integral form comprising a raised part, a first flat part, a concave part and a second flat part that are crabwise sequentially connected; the washer plate is put around an outside of the inner drive cylinder of the inner cover plate set, so as to make the two opposite wave pawl parts respectively locate inside the corresponding opening of the inner cover plate set; and two opposite raised dots are configured at an internal side of a periphery of the inner connecting plate, and the inner connecting plate is put around the outside of the inner drive cylinder, so as to make the two opposite raised dot respectively locate at a gap between the corresponding wave pawl part and the corresponding opening of the inner cover plate set, wherein when inner connecting plate is rotated, the raised dot slips through the raised part, the first flat part and the concave part of the wave pawl part and then locates on the second flat part.