Hon Hai Precision Industry Co., Ltd.

Hongfujin Precision Electronics (zhengzhou) Co., Ltd.

Xiao-Qing Zhang

Jiang-Feng Shan

Ji-Xiang Yin

Hua Li

Tsung-Jen Chuang

A protection circuit of a USB device can interrupt and restore the electrical coupling between a first interface and a second interface of the USB device as a user requires. A controlling module of the protection circuit outputs a first low-level signal or a second high-level signal according to a user operation, a switching module thereby connects or disconnects the first interface to or from the second interface according to the signal received. A USB device is also disclosed.

Internal voltage-canceling circuit and USB device using the same

A lockable storage device includes a main body defining a connector; and a locking mechanism including a stopping member and a driving plate assembly. The connector defines a receiving space for receiving a port, the stopping member is movable in the receiving space. The driving plate assembly includes a number of driving plates marked with numbers. When a combination of numbers, formed by surfaces which are on a same plane, is different from a predetermined number sequence, the storage device is locked, when the combination of numbers formed by the surfaces is the same as the predetermined number sequence, the storage device is unlocked.

Growing community of inventors

Zhengzhou, China

Xiao-Qing Zhang