Abstract: A hinge assembly includes a shaft, a leaf, a rotatable joint, a positioning member, an elastic engaging member, and a fastening member. The leaf is non-rotatably mounted on the shaft, and the rotatable joint is rotatably mounted on the shaft. The positioning member includes an engaging surface, and is non-rotatable relative to the rotatable joint. The elastic engaging member includes an engaging surface, and is non-rotatably sleeved on the shaft. The fastening member is engaged on the shaft. One of the engaging surfaces of the positioning member and the engaging member forms an engaging protrusion, and the other one of the engaging surfaces of the positioning member and the engaging member defines an engaging slot engaging with the engaging protrusion.

Abstract: An exemplary hinge assembly includes a shaft, a cam, a cam follower, a first elastic member, a second elastic member, a first sleeve, a second sleeve. The cam and the cam follower are sleeved on the shaft. The first elastic member is sleeved on the shaft, and configured for producing an elastic force along the shaft. The first sleeve is sleeved on the shaft, and non-rotatably connected to the cam follower. The second sleeve is sleeved on the shaft, and non-rotatably connected to the cam. The second elastic member is sleeved on the shaft, and configured for producing an elastic force for driving the first sleeve to rotate relative to the second sleeve. The controlling member resists one of the cam and cam follower, and capable of driving the cam away from the cam follower.

Abstract: An exemplary sliding mechanism includes a main plate, a slide plate, and a clock spring positioned between the main plate and the slide plate. The slide plate is slidably connected to the main plate. The clock spring includes a first spiral portion fixed to the slide plate, a second spiral portion fixed to the main plate, and a connecting portion connecting the first spiral portion to the second spiral portion. The clock spring is configured for driving the slide plate and enabling the slide plate to slide along the main plate after the slide plate is manually moved to a predetermined position with respect to the main plate.

Abstract: An exemplary double hinge assembly includes a first hinge assembly, a second hinge assembly, a guide rail, a sliding member, a first bracket, a second bracket. The sliding member is slidably positioned on the guide rail. The first hinge assembly includes a first rotatable pivot shaft. The second hinge assembly includes a second rotatable pivot shaft. The first bracket is fixed to the first rotatable pivot shaft, and the guide rail rotatably connects to the first rotatable pivot shaft. The second bracket is fixed to the second rotatable pivot shaft, and the sliding member rotatably connects to the second rotatable pivot shaft. A rotating axis of the first rotatable pivot shaft is substantially parallel to a rotating axis of the second rotatable pivot shaft. In addition, an electronic device using the double hinge assembly is also provided.

Abstract: An exemplary double hinge assembly (30) includes a first hinge subassembly (31), a second hinge subassembly (32), a first bracket (35), a second bracket (36) and a connecting member. The first hinge subassembly (31) includes a first rotatable pivot shaft (311). The second hinge subassembly (32) includes a second rotatable pivot shaft (321). The first bracket (35) is fixed to the first rotatable pivot shaft (311), and the second bracket (36) is fixed to the second rotatable pivot shaft (321). The first hinge subassembly (31) and the second hinge subassembly (32) are rotatably mounted to the connecting member respectively. A rotating axis of the first rotatable pivot shaft (311) is substantially parallel to a rotating axis of the second rotatable pivot shaft (321). In addition, an electronic device (50) using the double hinge assembly (30) is also provided.