Adjustable pliers with lever type positioning device

A pair of adjustable pliers with lever type positioning device, comprising:

• a clamp body comprising a first clamp part on one side thereof and a slide groove on another side thereof;
• a first handle comprising a first handgrip part on one end thereof and a second clamp part on another end thereof, a connection part disposed between the first handgrip part and the second clamp part, the connection part comprising an adjustment tooth and a movement groove, the connection part combined with the slide groove and slidable with respect to the slide groove, so that the first clamp part and the second clamp part open and close with respect to each other;
• a second handle comprising a second handgrip part on one end thereof and a combination part on another end thereof;
• and
• a lever type positioning device pivotally connect the combination part of the second handle with the connection part along a pivot axis, so that the second handle being linked with the clamp body;
• the lever type positioning device comprising a lever member and a positioning member, the lever member comprises a rotation shaft, and the positioning member is mounted around the rotation shaft;
• two controlling blocks are disposed on two side of the rotation shaft, and the positioning member comprises two operation parts corresponding to the two controlling blocks;
• each operation part comprises a lower level, a higher level, and a bevel connected between the lower level and the higher lever along the pivot axis, the lever member disposed in the movement groove and rotatable about the pivot axis with respect to the first handle between a locked position and a release position, the positioning member comprising a positioning tooth;
• when the lever member is at the locked position, the two controlling blocks correspond to the two lower levels, the positioning tooth of the positioning member is kept engaged with the adjustment tooth;
• when the lever member is changed from the locked position to the release position, the two controlling blocks abut against the two bevels and move to the two higher levels along the two bevels, whereby the two controlling blocks push the positioning member to move along the pivot axis, the lever member actuates the positioning member to move along the pivot axis, such that the positioning tooth is disengaged from the adjustment tooth, facilitating an adjustment of an opening degree between the first clamp part and the second clamp part.