Abstract: An electronic device includes a main body, a card holder assembly, and a card holder control assembly. The card holder assembly includes a shaft secured within the main body, at least one torsion spring, and at least one card holder. The torsion spring is arranged over the shaft. One end of each torsion spring is secured to the shaft, and an opposite end is secured to one card holder. When the card holder is secured within the main body, the torsion spring is in a compressed state. The card holder is rotatably fixed in place on the shaft. The control assembly includes a switch, a pulling rod, and at least one latching member. The switch is slidably connected to the main body and moveable between a first position and a second position. The latching member is connected to the pulling rod.

Abstract: An electronic device includes a main body, a card holder assembly, and a card holder control assembly. The card holder assembly includes a shaft secured within the main body, at least one torsion spring, and at least one card holder. The torsion spring is arranged over the shaft. One end of each torsion spring is secured to the shaft, and an opposite end is secured to one card holder. When the card holder is secured within the main body, the torsion spring is in a compressed state. The card holder is rotatably fixed in place on the shaft. The control assembly includes a switch, a pulling rod, and at least one latching member. The switch is slidably connected to the main body and moveable between a first position and a second position. The latching member is connected to the pulling rod.

Abstract: A lock includes a housing, a cover, a lock cylinder holder, a lock cylinder, a cam, a resisting shaft, at least one latching block, and at least one first elastic member. The cover is secured to one end of the housing. A gap is formed between the cover and the housing. The lock cylinder holder is secured to the housing. The lock cylinder is rotatably mounted in the lock cylinder holder. The cam is received in the housing and secured to the lock cylinder. The resisting shaft is rotatably mounted in the housing and includes a frustum shaped end. The latching block is received in the gap. The latching block includes an inclined surface corresponding to the frustum shaped end. The first elastic member is configured to connect the latching block to the cover or the housing. An electronic device using the lock is also provided.

Abstract: An electrical connector assembly includes a socket and a plug. The socket includes a first main body defining a first longitudinal receiving space. A sidewall of the first longitudinal receiving space defines a helical slot. The helical slot includes at least one entrance formed on an end of the first longitudinal receiving space. The plug includes a second main body and at least one fixing assembly mounted in a peripheral sidewall of the second main body. Each of the at least one fixing assembly includes a ball rotatably connected to and extends partially out of the peripheral sidewall of the second main body. The extending part of the at least one ball being is able to slide in the helical slot through the at least one entrance.

Abstract: A lock includes a housing, a cover, a lock cylinder holder, a lock cylinder, a cam, a resisting shaft, at least one latching block, and at least one first elastic member. The cover is secured to one end of the housing. A gap is formed between the cover and the housing. The lock cylinder holder is secured to the housing. The lock cylinder is rotatably mounted in the lock cylinder holder. The cam is received in the housing and secured to the lock cylinder. The resisting shaft is rotatably mounted in the housing and includes a frustum shaped end. The latching block is received in the gap. The latching block includes an inclined surface corresponding to the frustum shaped end. The first elastic member is configured to connect the latching block to the cover or the housing. An electronic device using the lock is also provided.