Metal detector

Abstract

A metal detector includes a detection disc, a detection rod rotationally connected to the detection disc, a protective sleeve detachably connected within the detection rod, and electronic components housed within the protective sleeve. The electronic components include a main circuit board extending along the length of the protective sleeve and a secondary circuit board perpendicular to the main circuit board, positioned near the opening of the protective sleeve. On the side of the secondary circuit board facing the interior of the detection rod, there is a detection disc socket. The detection disc includes a coil, a waterproof cable connected to the coil, and a detection disc plug located at the end of the waterproof cable. The waterproof cable and detection disc plug extend into the detection rod, allowing the detection disc plug to be inserted into the detection disc socket.

Dependencies are inferred from the claim text.