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Waterproof watch pushbutton

  • US 9,123,483 B2
  • Filed: 12/20/2012
  • Issued: 09/01/2015
  • Est. Priority Date: 12/22/2011
  • Status: Active Grant
First Claim
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1. A sealed pushbutton for a wristwatch, comprising:

  • a pushbutton head that is movable between a resting position and an active position,a first fixed conductive element in a case of the wristwatch,a second movable conductive element in the case of the wristwatch,an elastically deformable capsule that hermetically covers said first fixed conductive element, wherein an upper surface of said capsule is in physical contact with a lower surface of the pushbutton head and said capsule is locatable in a non-deformed position when the pushbutton head is in the resting position and in a deformed position when the pushbutton head is in the active position, anda guide piece of said pushbutton head, wherein said guide piece is pressed onto a peripheral part of said capsule, whereinsaid first and second conductive elements form a capacitive switch device in the case of the wristwatch, wherein said switch is in open state when the pushbutton head is in the resting position and in closed state when the pushbutton head is in the active position, andan outer surface of said first fixed conductive element is 1 square millimeter at maximum and a spacing between said outer surface of said first fixed conductive element and a surface of the second movable conductive element is at least 0.3 millimeter in said resting position of the pushbutton.

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