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:
Sep. 05, 2017
Filed:
Dec. 11, 2014
Huawei Device Co., Ltd., Shenzhen, CA (US);
HUAWEI DEVICE CO., LTD., Shenzhen, CN;
Abstract
A smart card connection circuit of an electronic device which includes a card holder, a travel switch, and a switching unit; a contact of the travel switch is located in the card holder, and an output end of the travel switch is connected to a control end of the switching unit; and when a smart card at a preset position in the card holder leaves the preset position, the smart card leaves the contact of the travel switch, the travel switch controls the switching unit to switch to a second output end, and each signal cable pin on the card holder is grounded by using the switching unit before a power cable pin on the card holder is grounded by using the switching unit. The present invention is applied to electronic devices such as a mobile phone and a tablet computer.