Abstract: An electronic lock includes a base, an electromagnetic mechanism, a connecting mechanism, a clamping mechanism and a magnetically-attractable plate. The base has an opening. The electromagnetic mechanism has a protrusion block. The electromagnetic mechanism is installed within the base. The protrusion block is penetrated through the opening and exposed outside the base. The connecting mechanism is connected with a rear cover. The clamping mechanism is arranged between the connecting mechanism and the electromagnetic mechanism. Moreover, the magnetically-attractable plate is connected with the clamping mechanism. When the electromagnetic mechanism is electrically conducted to generate a magnetic attraction force, the magnetically-attractable plate is attracted by the magnetic attraction force, so that the clamping mechanism is attracted on the electromagnetic mechanism.

Abstract: A protective case includes a main body and a fixing strap. The fixing strap includes a first elastic part, a second elastic part and a connecting part. The first elastic part and the second elastic part are respectively connected with two lateral sides of an inner surface of the main body. The first elastic part and the second elastic part have plural openings, so that the elastic forces of the first elastic part and the second elastic part are adjustable. The connecting part is connected with the first elastic part and the second elastic part. The connecting part is accommodated within a hollow portion of the main body, and coplanar with an outer surface of the main body. When the connecting part is pulled, the first elastic part and the second elastic part deform, so that an object is held between the connecting part and the main body.

Abstract: An electronic lock includes a base, an electromagnetic mechanism, a connecting mechanism, a clamping mechanism and a magnetically-attractable plate. The base has an opening The electromagnetic mechanism has a protrusion block. The electromagnetic mechanism is installed within the base. The protrusion block is penetrated through the opening and exposed outside the base. The connecting mechanism is connected with a rear cover. The clamping mechanism is arranged between the connecting mechanism and the electromagnetic mechanism. Moreover, the magnetically-attractable plate is connected with the clamping mechanism. When the electromagnetic mechanism is electrically conducted to generate a magnetic attraction force, the magnetically-attractable plate is attracted by the magnetic attraction force, so that the clamping mechanism is attracted on the electromagnetic mechanism.