Abstract: An electrical connector includes a body portion, a connecting wire, an electrically connecting portion, a locking element and a pressing element. The body portion has a first and a second end portion opposite to the first end. The connecting wire is located at the first end portion. The electrically connecting portion is located at the second end portion. The locking element is located in the electrically connecting portion and has an abutting end and a fastening end. The abutting end is located in the body portion, and the fastening end is located outside of the body portion. The pressing element is movably disposed on the body portion. Two ends of the pressing element are a pressing portion and a driving portion, respectively. The pressing portion is adjacently configured to the first end portion. The driving portion is to contact the abutting end.

Abstract: An electrical connector includes a body portion, a connecting wire, an electrically connecting portion, a locking element and a pressing element. The body portion has a first and a second end portion opposite to the first end. The connecting wire is located at the first end portion. The electrically connecting portion is located at the second end portion. The locking element is located in the electrically connecting portion and has an abutting end and a fastening end. The abutting end is located in the body portion, and the fastening end is located outside of the body portion. The pressing element is movably disposed on the body portion. Two ends of the pressing element are a pressing portion and a driving portion, respectively. The pressing portion is adjacently configured to the first end portion. The driving portion is to contact the abutting end.

Abstract: A sliding track assembly including a first, second and third rails, the second rail slidably mounted on the first rail, and the third rail slidably mounted on the second rail, so that the second and third rail can move relatively to the first rail and to each other. The sliding tract assembly also includes a latch member mounted on the third rail near its outer end and having two resilient or/and compressible portions each having asymmetric inward and outward facing slopes, and a lock member mounted or formed on the second rail near its outer end. The third rail can move together with the second rail when the latch member and the lock member are engaged, and the third rails can move freely by itself when the latch member and the lock member are disengaged.

Abstract: A sliding track assembly including a first, second and third rails, the second rail slidably mounted on the first rail, and the third rail slidably mounted on the second rail, so that the second and third rail can move relatively to the first rail and to each other. The sliding tract assembly also includes a latch member mounted on the third rail near its outer end and having two resilient or/and compressible portions each having asymmetric inward and outward facing slopes, and a lock member mounted or formed on the second rail near its outer end. The third rail can move together with the second rail when the latch member and the lock member are engaged, and the third rails can move freely by itself when the latch member and the lock member are disengaged.

Abstract: A fixing structure for fixing a device onto a casing. The casing includes a first side, a second side and a first hole. The first side is opposite to the second side. The first hole penetrates the first side and the second side. The device is inserted on the first side of the casing. The fixing structure includes a looping portion, a first string and at least one first protrusion. The looping portion is located at the first side of the casing and has an opening. The device is fastened in the opening. The first string is connected to the looping portion. The first protrusion is fixed to and protrudes from the first string. The first string passes through the first hole from the first side of the casing, so that the first protrusion presses on the second side of the casing.