Flat key with circuit chip
AssigneeAug. Winkhaus GmbH & Co. KG
InventorKarl-Heinz Spahn
Life of this patent
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Abstract
A flat key for or a lock which is coded mechanically as well as electronically, includes a flat basic shaped part (11) consisting of metal, with a shank section (9) and a bow section (13). A circuit chip (23), fitted with structural parts (25) of an electronic circuit, is in a recess (21) in the bow section, formed by an integral bottom (19) of the basic shaped part (11) and sealed by a casting compound (29). Housing shells (15, 17) surrounding the bow section (13) are on facing flat sides of the bow section (13). The housing shell (15) lying over the recess (21) is bonded to the bow section (13). The other housing shell (17) bears a U-shaped rib (43) by which it engages behind the bonded housing shell (15).
Claims18
A flat key comprising a flat basic shaped part (11) having a shank section (9) including mechanical lock-control members (3) and a bow section (13), a circuit chip (23) with structural elements (25) of an electronic circuit disposed in a recess (21) of the bow section (13),
- and two housing shells (15, 17) substantially completely surrounding the bow section (13) and disposed on facing flat sides of the bow section (13), wherein
- the recess (21) is closed toward a first one of the two flat sides of the bow section (13) by a bottom (19) formed integrally by the basic shaped part (11),
- the recess (21) with the circuit chip (23) is filled with an insulating casting compound (29),
- the housing shell (15) on the second one of the two flat sides is bonded to the basic shaped part (11) along a bonding seam (31) sealingly surrounding the recess (21).
A flat key comprising a flat basic shaped part (11) having a shank section (9) including mechanical lock-control members (3) and a bow section (13), a circuit chip (23) with structural elements (25) of an electronic circuit, disposed in a recess (21) of the bow section (13), and two housing shells (15, 17) substantially completely surrounding the bow section (13) and disposed on facing flat sides of the bow section (13), wherein
- the housing shells (15, 17) have first fastening members (43) for fixing the housing shells (15, 17) form-lockingly directly to one another,
- the bow section (13) has a key-ring hole (45) on the side of the recess (21) distant from the shank section (9),
- a tubular, second fastening member (51) fixes the two housing shells (15, 17) to one another through the hole (45).
Dependencies are inferred from the claim text.