Abstract: A hinge assembly system (200) includes a hinge assembly structure (210) and a driving structure (220). The driving structure includes a driving shaft (50), a gear (60) and a sliding unit (70). The gear engages with the driving shaft in a manner such that the gear may drive the driving shaft to rotate but the driving shaft cannot drive the gear to rotate. The sliding unit includes a rack (72). The rack drives the gear to rotate. The driving structure provides a force allowing the hinge assembly structure to cause the hinge assembly to rotate.

Abstract: A connecting mechanism for a battery case and a main body of a portable electronic device includes a main body (10), a connecting member (20), a cover (30), and a shaft (40). The main body has a receptacle (162), and a recessed portion (192) for receiving the battery case. The connecting member has a body (22) and one or more mounting portions (24). The cover defines a sliding space. The shaft extends through the mounting portions and is received in the receptacle. Thus the connecting member is rotatable relative to the main body about the shaft. The connecting member is received in the sliding space and can slide along the sliding space relative to the cover. Thus the cover is both rotatable and slidable relative to the main body, and need not be detached from the main body.

Abstract: An enclosure of a mobile phone with changeable panel includes a front cover (1), a panel (2), a rotatable holder (3), and a spring (4). The front cover defines a through hole (16) and latch slots (171, 172). The panel has projections (241, 242) at an edge thereof, and the projections can be engaged in the latch slots of the front cover. The panel further has a hole (25) corresponding to the through hole of the front cover. The holder has a latch portion (33), and the spring is engaged around the holder. The holder with the spring is received in the hole of the panel, and the holder is further received in the through hole of the front cover. The holder is rotated and the spring is compressed, thereby securely holding the panel on the front cover.

Abstract: A hinge (300) includes a cam (32), a cam follower (30), a torsional spring (31), and a can (33). The cam includes a round flange (321), with a notch (321b) defined therein. The cam follower connects with the cam, and includes an engaging ring (301) around an open end thereof and a projection (303) on an inner wall thereof. The projection is removably engaged in the notch of the cam. The spring is twisted and attached in the cam follower, with one end fixed on the cam follower and the other end fixed on the cam. The can defines a groove (334) rotatably receiving the engaging ring of the cam follower, and a guiding hole (335) movably receiving the cam. The hinge has a relatively simple and stable unified structure.

Abstract: A hinge assembly (10) for joining a body and a cover of a mobile phone includes an inner housing (100), a key (110), a pressure spring (120), a can (130), a slider (140), a damper (150), an outer housing (160), a fastener (170), and a torsion-bar spring (190). The can includes an acceptor (132) defining an axial slot (132b) in a peripheral wall thereof, and a protrusion (131) having a stepped hole. The slider has an adjoining block (141) received in the stepped hole. One end of the torsion-bar spring is secured onto the fastener, and the other end of the torsion-bar spring is received in the slot. A user presses the key to slidably remove the slider from the stepped hole of the can, whereupon the torsion-bar spring can rotationally drive the slider and the fastener, with the outer housing turning in unison therewith. Thus the cover is opened.

Abstract: A connecting structure for a battery case and a main body of a portable electronic device comprises a base (1), a connecting member (2), a cover (3), a shaft (4), a spring module (5) and a cylinder (6). The base has a receiving part (163) and a recessed portion (194). A hinge (22) is formed on one end of the connecting member. The cover has a track (322) and the connecting member can slide along the track. The connecting member is connected to the cylinder, and the shaft extends through the cylinder and is received in the receiving part of the base.

Abstract: A hinge assembly (10) for joining a cover section (012) to a body section (014) of a foldable electronic device (01) includes: a button (1); a locking element (2); a main shaft (4); a driving spring (3); a cam (5) including a latching cam surface (54) on one end thereof, and two reverse rotating grooves (56) on another end thereof; a barrel (6) including two latching posts (62) engaging in the grooves; an end shaft (8); and a torsion spring (7) including two end portions attached to the barrel and the end shaft. The button, the locking element and the driving spring are located around one end of the main shaft, and the cam and the barrel are located around another end of the main shaft. When the button is pushed, the hinge assembly fully opens the cover section from body section. This provides a user with convenient one-handed operation.

Abstract: A hinge assembly includes a body drive member (1), a cover drive member (2), and a locating member (3). The body drive member has an outer screw thread (16) on an outer periphery thereof. The cover drive member has a central cavity (212, 224), and a projection (223) and an inner screw thread (216) formed in the cavity. The locating member has a projection (31) formed on an outer periphery thereof, and a central hole (33). The body drive member extends through the cavity and the hole, thereby integrating the hinge assembly into a complete unit, with the thread of the body drive member engaging with the thread of the cover drive member, and the projection of the cover drive member movably engaging with the projection of the locating member. The hinge assembly exerts reduced force on a foldable electronic device when the foldable electronic device is opened or closed.