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:
Jul. 12, 1994
Filed:
Mar. 18, 1993
Makoto Watanabe, Nagoya, JP;
Isao Mochizuki, Kaizu, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
The present invention provides a keyswitch assembly having a key restrained from horizontal movement and from free vertical movement so that the key will not be moved by an accidental light touch to the key while providing a satisfactory touch of the key and reliable switching action. Pairs of pins formed at the opposite ends of four support members, four upper guide portions and four lower guide portions cooperate to support a key for vertical movement. The respective inner surfaces of the guide portions are substantially in contact with the respective outer surfaces of the support members, each with a very small clearance therebetween, respectively. A pressure plate, mounted on an elastic switching member, and the support members cooperate to support the key. Thus, the key is restrained from horizontal movement and from free vertical movement.