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. 06, 2004
Filed:
Apr. 17, 2002
Satoru Kimura, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A jack device which does not malfunction because of overcurrent in an apparatus or a device that is connected to the jack device by preventing short-circuit between contacts in inserting a plug. The jack device, into which a single-head plug ( ) having plug poles in the direction of insertion is inserted for connection, has a contact piece ( ) that is arranged at the end of plug ( ) and brought into contact with a first plug pole (plug pole ) and contact piece ( ) that is arranged neighboring the first plug pole and brought into contact with a second plug pole (plug pole ). To widen the spacing between the two plug contact pieces ( ), ( ) in the direction of plug insertion, the spacing D between the plug connecting parts ( ), ( ) of both contact pieces ( ), ( ) is almost equal to or greater that the length L of the first plug pole (plug pole ), so that when the first plug pole (plug pole ) contact with the inside contact piece ( ), the contact piece ( ) on the inlet side contacts with the second plug pole (plug pole ).