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:
Jan. 22, 1991
Filed:
Feb. 16, 1989
Jyoji Tsutsumi, Iwaki, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A push-button switch wherein proper operation is always assured. The push-button switch includes an insulating case of an enclosure structure having a side wall from which a plurality of connecting terminals and a dummy terminal are exposed outside. The insulating case further has a first recess formed in a lower face thereof on the side of the dummy terminal which opposes to a printed circuit board to which the push-button switch is soldered, and a second recess formed in the first recess and located below the dummy terminal. A projected step portion is provided around the dummy terminal and has a side face having a sufficient height to prevent flux of cream solder from advancing to the location of the dummy terminal. Upon soldering, flux will be retained in the first and second recesses of the insulating case and between the projected portion and the side wall on which the stepped portion is provided and will not stick to any portion around the dummy terminal thereby to assure communication of air between the inside and the outside of the insulating case after soldering by way of a fine gap between the dummy terminal and the insulating case.