Patent ID: 8117949

Claim:
A movable wrench comprising: a fixed jaw, whose one side has a connecting part extended with a holder; wherein one side of the connecting part has a sliding track with an inner side surface, an insertion opening is formed under the sliding track, the inner side surface of the sliding track has an accommodating cavity whose bottom surface is extended and formed with an inner groove toward the holder, the end of the inner groove away from the accommodating cavity is formed with an operating space whose side surface is an urging wall; a movable jaw, which is inserted into the sliding track via the insertion opening and has a saw section on its inner side near one side of the accommodating cavity; a screw bar, which is disposed in the accommodating cavity with its top surface and bottom surface being penetrated through and has a thread section on its body, the thread section matching with the saw section on the movable jaw; a first compressible spring, which goes through the connecting part with its top end urging against the bottom surface of the screw bar; a shaft, which goes through the first compressible spring and the screw bar under the connecting part; an operating element, which is disposed in the inner groove and urges against the bottom surfaces of the accommodating cavity and the inner groove, both ends of the operating element are respectively an operating end and a locking end, wherein the operating end is in the operating space, the locking end is near the bottom surface of the accommodating cavity, the locking end has a hook part with a top surface, and the top surface of the hook part urges against the bottom surface of the screw bar and surrounds the first compressible spring; a pin, which goes through the operating element under the inner groove of the connecting part, wherein the operating element rotates with respect to the pin; and a second compressible spring, which is disposed in the operating space with its bottom end urging against the urging wall and its top end urging against the bottom part of the operating end.