Abstract: A pivoting assembly for an electronic device, being a clickable-open and clickable-shut cover or shield with click-step positioning includes a pivoting shaft extending along an imaginary axis, an inner movable member, an intermediate movable member, and an outer stationary member concentrically surrounding the imaginary axis. First positioning structures and first engaging structures are connected to one of the inner movable member and the intermediate movable member and a number of second positioning structures and second engaging structures are also so connected. When the pivoting shaft is rotated in an opening direction, the first positioning structures compress and slide across the first engaging structures. When the pivoting shaft is rotated in a closing direction, the second positioning structures compress and slide across the second engaging structures.

Abstract: A pivoting assembly for an electronic device, being a clickable-open and clickable-shut cover or shield with click-step positioning includes a pivoting shaft extending along an imaginary axis, an inner movable member, an intermediate movable member, and an outer stationary member concentrically surrounding the imaginary axis. First positioning structures and first engaging structures are connected to one of the inner movable member and the intermediate movable member and a number of second positioning structures and second engaging structures are also so connected. When the pivoting shaft is rotated in an opening direction, the first positioning structures compress and slide across the first engaging structures. When the pivoting shaft is rotated in a closing direction, the second positioning structures compress and slide across the second engaging structures.

Abstract: A charger includes a charging unit and a hub unit. The charging unit includes an enclosure, a charging circuit and two wires. The enclosure defines a matching groove. Opposite sidewalls of the matching groove separately define a limiting groove. The hub unit includes a foundation, a circuit unit, a locking protrusion, a pair of bolts and a pair of hook assemblies. The foundation defines a holder. The locking protrusion, the bolts and the latching members are all received in the holder. One end of each of the two wires is electrically coupled to the charging circuit, and the other end of each of the two wires extends through the matching groove and the receiving groove in that order and electrically couples to the circuit unit.

Abstract: An electronic device ensuring the polarity-correct installation of a battery includes a polarity-safe structure. The polarity-safe structure includes a fixing member located in a fixing groove and an elastic member secured in a receiving groove opposite to the fixing member. The battery cathode can be electrically coupled to the elastic member, but while the battery anode can be coupled to the fixing member, it cannot couple to the elastic member.

Abstract: An electronic device defines a receiving groove for an antenna, a first opening, and a second opening. The first opening and the second opening are at two opposite ends of the receiving groove, and allow an antenna assembly to be extended or retracted in the receiving groove to allow the electronic device to receive different types of wireless signals.

Abstract: A charger includes an enclosure, a charging circuit received in the enclosure., a latching member and a pair of elastic members. The enclosure defines a matching groove. The pair of elastic members are electrically connected to the charging circuit and are mounted on opposite sidewalls of the matching groove. The latching member is mounted in the matching groove, and is flexible. The present disclosure further provides a hub matching with the charger. The hub includes a main body, a circuit unit, a bulge and a pair of conductive pieces. The main body defines a receiving groove. The bulge protrudes from a bottom of the receiving groove. The pair of conductive pieces are electrically connected to the circuit unit and are located at opposite sidewalls of the bulge. A sidewall of the bulge defines a latching hole, and the latching member latches with an edge of the hole.

Abstract: A charger includes a charging unit and a hub unit. The charging unit includes an enclosure, a charging circuit and two wires. The enclosure defines a matching groove. Opposite sidewalls of the matching groove separately define a limiting groove. The hub unit includes a foundation, a circuit unit, a locking protrusion, a pair of bolts and a pair of hook assemblies. The foundation defines a holder. The locking protrusion, the bolts and the latching members are all received in the holder. One end of each of the two wires is electrically coupled to the charging circuit, and the other end of each of the two wires extends through the matching groove and the receiving groove in that order and electrically couples to the circuit unit.

Abstract: An electronic device defines a receiving groove for an antenna, a first opening, and a second opening. The first opening and the second opening are at two opposite ends of the receiving groove, and allow an antenna assembly to be extended or retracted in the receiving groove to allow the electronic device to receive different types of wireless signals.

Abstract: A multiple-input multiple-output (MIMO) device includes a substrate, a shielding cover and a MIMO antenna. The shielding cover is positioned on the substrate, and includes a plurality of sidewalls. The MIMO antenna includes a first solid antenna, a second solid antenna, and a plane antenna. The first solid antenna and the second solid antenna are electrically connected to two ends of one sidewall of the shielding cover, respectively. The first plane antenna is configured on the substrate, and disposed between the first solid antenna and the second solid antenna.

Abstract: A multiple-input multiple-output (MIMO) device includes a substrate, a shielding cover and a MIMO antenna. The shielding cover is positioned on the substrate, and includes a plurality of sidewalls. The MIMO antenna includes a first solid antenna, a second solid antenna, and a plane antenna. The first solid antenna and the second solid antenna are electrically connected to two ends of one sidewall of the shielding cover, respectively. The first plane antenna is configured on the substrate, and disposed between the first solid antenna and the second solid antenna.