Positioning device

A positioning device, including:

• a base seat, including a plurality of through holes and a slide groove which extends in a first direction;
• a clamping assembly, disposed within the slide groove, including a first clamping body and a second clamping body, the first clamping body and the second clamping body being respectively movable relative to each other and relative to at least one said through hole between a locking position and a release position in the first direction;
• and
• an adjustment assembly, including a first driving rod, a second driving rod and at least one rotation rod, the at least one rotation rod rotatably disposed within the base seat, the first driving rod and the second driving rod respectively rotatably disposed within the slide groove, the first driving rod including a first thread section and a first bevel gear connected with the first thread section, the second driving rod including a second thread section and a second bevel gear connected with the second thread section, the first clamping body screwed to the first thread section and the second clamping body screwed to the second thread section, each of the at least one rotation rod including a third bevel gear, the third bevel gear meshed with the first bevel gear and the second bevel gear, so that the first driving rod and the second driving rod are respectively rotated by the at least one rotation rod.