The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 21, 2003
Filed:
Dec. 23, 1999
Seppo Salminen, Turku, FI;
Nokia Mobile Phones Ltd., Espoo, FI;
Abstract
A key structure used in the user interface of an electrical device comprises a plate-like member ( ) which comprises electrical couplings for transforming keystrokes into electrical signals, and an electrically conducting dome-like member ( ) on the plate-like member. This dome-like member is arranged to have such suitable elastic characteristics that it is at least partly pressed against the plate-like member when a pressing force substantially perpendicular towards the plate-like member acts on the dome-like member, and to return to the dome-like position when the pressing force is removed. The key structure further comprises a button member ( ) made of an electrically isolating material and being located on the dome-like member. The key structure is characterised in that the elastic deformation of the button member due to the pressing force is substantially similar to that of the dome-like member.