Rapid adjustable wrench

A rapid adjustable wrench, the adjustable wrench is comprised of wrench body, adjustable wrench head, worm, pin shaft, spring, support pin, bond type wedge, stop pin, there is a fixed wrench head in the front end of the wrench body, there is a handle in the back end of the wrench body, there is a clamping face on the fixed wrench head, there is a recess below the fixed wrench head, there are two faces that parallel to each other in the inner upper of the recess, the lower portion of the recess is in a circular arc surface, there is a cutout downward the middle portion of the circular arc surface, the cutout connects with a rectangular through hole, the adjustable wrench head is comprised of the upper portion, middle portion and lower portion, there is a clamping face on the upper portion, the thickness of the middle portion is less than the distance of the two faces that are parallel to each other within the recess of the fixed wrench head, the two sides of the lower portion of the adjustable wrench head are symmetrical and in circular arc surface, the greatest distance between the arc surface is less than the diameter of the bottom circular arc surface of the recess of the fixed wrench head, the teeth are set on the top end of the lower portion of the adjustable wrench head, the top of the teeth is in blunt and meshed with the spiral gear of the worm, characterized in that, a bond type hole is set below the recess of the fixed wrench head, the bond type hole through the rectangular through hole from the wrench body surface that away from the clamping face of the fixed wrench head and extends to a position that adjacent to the below of the clamping face of the fixed wrench head, and forms a bond type through hole and a bond type blind hole, which are located on the two sides of the rectangular through hole respectively, the centerline of the bone type hole is perpendicular to the clamping face of the fixed wrench head, two spring holes through the lower portion of the recess and extend to the lower portion of another side of the bond type through hole and the bond type blind hole respectively, inserting the one end of the spring into the spring hole through the lower portion of the recess, inserting the thinner end of the two support pins into the central hole of the spring also through the lower portion of the recess, putting the worm into the middle of the rectangular through hole, inserting the one end of the pin shaft into the bond type through hole from the outside of the wrench body, while depressing the top end of the support pin within the bond type through hole, such that the pin shaft is located over the top end of the support pin, the pin shaft through the central hole of the worm, while depressing the top end of the support pin within the bond type blind hole until the pin shaft is located over the top end of the support pin, and contacted with the bottom face of the bond type blind hole, thereafter, embedding the bond type wedge into the bond type hole from the outside of the wrench body, and preventing the pin shaft removed from the wrench body, depressing the worm in the opposite direction of the spring tension, facing the clamping face of the adjustable wrench head with the clamping face of the fixed wrench head and pushing the lower portion of the adjustable wrench head to the recess of the fixed wrench head, a recess is set on one side of the middle portion of the adjustable wrench head which is mated with the adjustable wrench head, a stop through hole is set on one side of the recess that away from the clamping face of the fixed wrench head, fixing the stop pin within the stop through hole, and preventing the adjustable wrench head from sliding off along a direction that away from the clamping face of the fixed wrench head.