Patent ID: 7543521

Claim:
A fast adjustable spanner, comprising: a body of which an action side is provided with a protruding stationary jaw of which a bottom is formed with a glide path communicating with an accommodation slot provided in the body; a movable jaw provided with a sheath fringe corresponding to the glide path on which the movable jaw may transversally move, in which a tooth portion is provided at a bottom of the sheath fringe; a working part provided in the accommodation slot of the body to lengthways move, in which a protruding joint portion is provided above the working part and provided with a screw; wherein the working part is formed with two flakes symmetrical to each other and respectively formed with two protruding clip arms and the joint portion is formed with the clip arm on each flake; wherein a stationary hole is provided on each of the two flakes of the working part and a stationary part is used to pass through the stationary hole of each of the two flakes so that the two flakes may be connected to each; wherein a lug is provided at a side of the accommodation slot of the body, such that when the two flakes of the working part are connected to each other, a wedge portion is formed at a side of the lug of the accommodation slot corresponding to the working part, the wedge portion of the working part used to wedge to the lug at the side of accommodation slot; wherein a first chamber is provided at an operation side of the stationary jaw for a magnet, a second chamber is provided oppositely at an operation side of the movable jaw, a magnet of which magnetism is the same as that provided in the first chamber is provided in the second chamber, such that when the screw of the working part is separate from the tooth portion of the movable jaw, by homo-magnetic repulsion, the movable jaw automatically glides towards the stationary jaw on the glide path of the body; and at least one elastic part provided between the working part and the accommodation slot, used to support the working part so as to make the screw of working part wedge to the tooth portion of movable jaw.