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:
Nov. 02, 2004
Filed:
Feb. 28, 2003
Hirofumi Sato, Gifu, JP;
Isao Mochizuki, Gifu-ken, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
A key switch device, wherein the second cam part ( B) of a second link member ( ) is supported on a cantilever member ( ) extended from the second link member ( ) in the form of a cantilever and the cantilever member ( ) is energized by a torsion spring ( ) in the direction to allow the first cam part ( A) of a first link member ( ) to abut mutually on the second cam part ( B), a cam face ( A) is formed on the second cam part ( B), a cam face ( A) abutting on the linear and punctate contact parts of the cam face ( A) of the second cam part ( B) at an acute angle in plan view and having a slanted surface ( ) is formed on the first cam part ( A), and a clearance ( ) formed from the contact part to the fixed point ( ) of the torsion spring ( ) is provided between the cam face ( A) of the second cam part ( B) and the slanted surface ( ).