METAL DETECTOR ASSEMBLY AND METHOD OF ASSEMBLING A METAL DETECTOR

摘要

A stable assembly of a metal detector is disclosed which can ensure a tension free physical connection between a former and a case of the metal detector. The metal detector includes a case with at least four closed sides and two openings, a non-conductive former having a pass-through aperture, and electromagnetic coils arranged on the former to produce an electromagnetic field within the former which is disturbed by a metallic body passing through the aperture. The former formed into a single piece and having a width equal to the inner width of the case, is inserted into the case from the front side of the case. The space between the former and the case is filled with a potting medium. The physical connection between the former and the case includes a protruding-recess which is strengthened by an adhesive.

主权项

1. A metal detector comprising:
a case having at least four closed sides, a front side and a rear side; a first opening on the said rear side of said case and a second opening on the front side of said case; a former having a pass-through aperture, coaxial with said first and said second openings of said case, said case having an inner width (W2) in a direction along the pass-through aperture, said former having a width (W1) in a direction along the pass-through aperture, wherein said width (W1) of said former is equal to said inner width (W2) of said case; an arrangement of electromagnetic coils for generating and receiving an electromagnetic field inside of said pass-through aperture, wherein said coils are arranged on said former; said case surrounding said former; first protruding means attached to said case adjacent to said first opening of said case, first and second recessing means formed in said former, adhesive means which bonds said first protruding means to said first recessing means; a potting medium filling a space between said former and said case; and keying slots on at least one surface directed towards any said closed side of said case; wherein said keying slots are filled with the potting medium and increase a contact area between said former and said potting medium.