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:
Aug. 26, 1997
Filed:
Sep. 11, 1995
Junichi Tanji, Koriyama, JP;
Fumiyoshi Oono, Koriyama, JP;
Takuya Ishida, Koriyama, JP;
Toshimi Akimoto, Koriyama, JP;
Tomonobu Watanabe, Tamura-gun, JP;
Katutoshi Yoshida, Koriyama, JP;
Ichiro Hoshi, Koriyama, JP;
Tatsuo Yamauchi, Koriyama, JP;
Junichiro Imai, Koriyama, JP;
Hitachi Telecom Technologies, Ltd., Koriyama, JP;
Abstract
A key unit is provided with a first print substrate on which a contact portion and a LED capable to be mounted on flat surface are mounted, a conductive contact rubber, placed on the first print substrate, having a movable contact portion which can contact with the contact portion and an open portion in which the LED is accommodated, a key button placed on the conductive contact rubber, a LED lens, placed on the edge portion of the open portion of the conductive contact rubber, which leads the light beam generated from the LED in the open portion, and a key case having a through hole into which the key button is slidably inserted and a lens insertion hole into which the LED lens is inserted. The key unit may also be provided with a chip resistor to protect the LED, which is mounted on the first print substrate at a position below a lower end face of the key case. Further, a key button may be inserted into the through hole and a position where the LED lens is inserted into the lens insertion hole, the width of the LED lens is made to be shorter than that of the LED.