Patent ID: 7252539

Claim:
An insertion assembly of a key management system comprising: a sleeve having a front opening; an inner side of the sleeve near the front opening having an inner thread; a plug cover having a part embedded into a rear end of the sleeve; the front end of the plug cover being formed with a plurality of hooks to retain the plug cover in the sleeve tightly; an encoding chip connected to a positive conductive cambered sheet and a negative conductive cambered sheet; an insulating seat having an annular post with a reduced size from other portion of the insulating seat; the negative conductive cambered sheet being installed around the annular post; a rear end of the insulating seat being formed with a notch; the positive conductive cambered sheet being installed in the notch; a conduit installed at a front side of the insulating seat; the conduit having a through hole; a retaining threaded ring installed around an outer periphery of the insulating seat; the retaining threaded ring having a through hole at a center portion thereof; a front end of the conduit being inserted into the through hole of the retaining threaded ring; an outer thread of the retaining threaded ring being screwed to the inner thread of the sleeve; an insulating rubber plug installed at a front end of the conduit; the insulating rubber plug having a through hole; a conductive head installed at a front end of the insulating rubber plug; the conductive head having a through hole; and a conductive rod passing through the positive conductive cambered sheet, the insulating seat, the negative conductive cambered sheet, the through hole of the conduit, the through hole of the insulating rubber plug, and the through hole of the conductive head; an inner periphery of the conductive rod being spaced from an inner periphery of the conduit.