Card reader having improved electrostatic discharge functionality
View Patent ↗A smart card reader including a smart card reading assembly including a plurality of smart card chip communication contacts and a static electricity discharge element assembled with the smart card reading assembly, the static electricity discharge element including a plurality of static electricity discharge contacts contacting multiple diverse surfaces of a smart card for discharge of static electricity thereon.
1. A smart card reader comprising:
a smart card reading assembly including a plurality of smart card chip communication contacts; and
a metallic static electricity discharge element assembled with said smart card reading assembly, said metallic static electricity discharge element including a plurality of static electricity discharge contacts contacting at least top and bottom non-coplanar surfaces of a smart card for discharge of static electricity thereon,
said metallic static electricity discharge element being configured such that said plurality of static electricity discharge contacts are in contact with said at least top and bottom non-coplanar surfaces of said smart card prior to and during contact between said plurality of smart card chip communication contacts and a smart card chip, and wherein said metallic static electricity discharge element and said plurality of static electricity discharge contacts are disposed along an entrance edge portion of the smart card reading assembly and said plurality of smart card chip communication contacts do not extend along the entrance edge portion.
2. A smart card reader according to claim 1 and wherein said plurality of static electricity discharge contacts are also arranged to contact edge surfaces of said smart card prior to and during contact between said plurality of smart card chip communication contacts and said smart card chip.
3. A smart card reader according to claim 1 and wherein said static electricity discharge element comprises a unitary element.
4. A smart card reader according to claim 3 and wherein said unitary element includes first and second generally identical side portions and a central portion.
5. A smart card reader according to claim 4 and wherein each of said first and second generally identical side portions includes a side wall having integrally formed therein an inwardly facing spring contact.
6. A smart card reader according to claim 4 and wherein each of said first and second generally identical side portions includes a side wall having a tab extending outwardly from a top edge thereof.
7. A smart card reader according to claim 4 and wherein each of said first and second generally identical side portions includes a side wall having an upwardly facing spring contact extending from a bottom edge thereof.
8. A smart card reader according to claim 4 and wherein said central portion supports a plurality of downwardly facing spring contacts, some of which are arranged to contact corresponding electrical contacts of a smart card chip and all of which are arranged to contact a top surface of said smart card.
9. A smart card reader according to claim 1 and wherein said smart card chip communication contacts and said static electricity discharge contacts are arranged such that upon insertion of a smart card into said smart card reading assembly, said static electricity discharge contacts contact said smart card and smart card chip contacts for discharge of static electricity therefrom, prior to contact between said smart card chip communication contacts and said smart card chip contacts.
10. A smart card reader according to claim 9 and wherein said static electricity discharge element comprises a unitary element.
11. A smart card reader according to claim 10 and wherein said unitary element includes first and second generally identical side portions and a central portion.
12. A smart card reader according to claim 11 and wherein each of said first and second generally identical side portions includes a side wall having integrally formed therein an inwardly facing spring contact.
13. A smart card reader according to claim 11 and wherein each of said first and second generally identical side portions includes a side wall having a tab extending outwardly from a top edge thereof.
14. A smart card reader according to claim 11 and wherein each of said first and second generally identical side portions includes a side wall having an upwardly facing spring contact extending from a bottom edge thereof.
15. A smart card reader according to claim 11 and wherein said central portion supports a plurality of downwardly facing spring contacts, some of which are arranged to contact corresponding electrical contacts of a smart card chip and all of which are arranged to contact a top surface of said smart card.
16. A smart card reader according to claim 1 and wherein said static electricity discharge element includes at least one aperture in order to reduce unwanted electrical coupling during electrostatic discharge.
17. A smart card reader according to claim 1 and wherein:
at least one of said static electricity discharge contacts is not in contact with said smart card chip prior to contact between said plurality of smart card chip communication contacts and said smart card chip; and
said static electricity discharge contacts are not in contact with said smart card chip during contact between said plurality of smart card chip communication contacts and said smart card chip.