Positioning device for a hand tool

A positioning device for a hand tool comprising:

• a handle having a first connecting portion forming a chamber defined therein, the first connecting portion having a threaded hole in communication with the chamber;
• a positioning member movably received in the chamber, the positioning member comprising a pusher having a plurality of first teeth formed thereatop and a spring abutting against the pusher, the pusher having an inclined edge formed thereon;
• a rotatable plate having a threaded shank extended therefrom, the threaded shank screwedly passing through the threaded hole for locking the pusher, the threaded shank having a conical end, the conical end of the threaded shank corresponding to the inclined edge of the pusher for rigidly engaging with the inclined edge of the pusher;
• and
• a tool head pivotally connected to the first connecting portion, the tool head having a plurality of second teeth extended therefrom and toward the handle, the second teeth rigidly engaging with the first teeth for limiting the pivotal movement of the tool head;
• wherein when the rotatable plate is rotated, the threaded shank moves outwardly away from the pusher and the pusher disengages with the rotatable plate such that the tool head is available to be pivotally adjusted in a desired angle relative to the handle.