• Patent Title: Use of constant force spring in keyboard assembly
  • Application No.: US11589278
    Application Date: 2006-10-30
  • Publication No.: US07678989B2
    Publication Date: 2010-03-16
  • Inventor: Van S. Chandler
  • Applicant: Van S. Chandler
  • Applicant Address: US TX Austin
  • Assignee: Magnekey
  • Current Assignee: Magnekey
  • Current Assignee Address: US TX Austin
  • Agency: Foley & Lardner LLP
  • Agent Gilberto M. Villacorta; Kevin McHenry
  • Main IPC: G10C3/12
  • IPC: G10C3/12
Use of constant force spring in keyboard assembly
Abstract:
An electronic keyboard that includes a plurality of keys including a first key. The keyboard further includes a key support supporting the first key for movement between a rest position and a depressed position. The keyboard also includes a first key return spring configured to apply a return force to the first key to bias the first key toward the rest position. In the keyboard, the first key return spring is configured such that the return force has a substantially constant magnitude throughout the movement of the first key between the rest position and the depressed position.
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