Abstract: A hinge assembly (200) includes a button (3), a retaining member (4), a fixing seat (5), a control member (6), a first spring (7), a follower (10), a cam (30), a second spring (9) and a shaft (20). The button has at least one pushing portion (31). The control member has at least one receiving groove (61), and the pushing portion is received in each receiving groove. Each pushing portion resists the control member. The first spring provides an elastic force to the control member. The cam includes a cam hole having an inner screw thread (342). The second spring provides an elastic force to make the cam and the follower resist each other. The shaft defines an outer screw thread (233). The outer screw thread engages with the inner screw thread of the cam.

Abstract: A hinge mechanism includes a fixed member (20), two rolling elements (40), an elastic member (60), a rotational member (50) and a shaft (30). The fixed member has a flange (201) and a stop portion (202) thereof. Two first hollows (2022) are defined in the end part of the flange. Each rolling element has two rolling portions (402, 403). The rotational member includes a main portion (51) defined two hemisphere second hollows (511), and a middle portion (53) defining two receiving chambers (531) therein for receiving the rolling bodies. The first and second rolling portions of each rolling element are respectively received in the first hollow and the second hollow. The shaft extends through the fixed member, the elastic member and the rotational member. One end of the elastic member resists the rotational member and the other end of the elastic member is fixed in the longitudinal direction of the shaft.

Abstract: A hinge mechanism (20) includes a mounting member (12), at least one retractable elastic shaft (14) and a rotating member (18). The retractable elastic shaft has two opposite ends. The mounting member is located at one end of the retractable elastic shaft and defines at least one first hollow (125). The rotating member is located at the other end of the retractable elastic shaft and defines at least one second hollow (187). The first and second hollows respectively receive two ends of the retractable elastic shaft. The mounting member is rotatable relative to the rotating member to drive the retractable elastic shaft to move between a first position where the retractable elastic shaft is slantwise to an axis of the rotating member and a second position where the retractable elastic shaft is parallel to the axis of the rotating member. The hinge mechanism is easy to be manufactured.

Abstract: A battery cover assembly includes a battery cover (3) defining a pair of guide rails (326) therein, a connecting member (2), a housing (1) defining a receiving slot (164) and a battery-receiving compartment (194), a plurality of springs (5, 7), a plurality of sheaths (6), and an antenna rod (4). The connecting member is engaged with the sheaths and is loosely received in the guide rails along a lateral direction. The antenna rod inserts into the receiving slot through the connecting member, the sheaths, and the springs such that the battery cover can rotate about the antenna rod. When the battery cover is rotated downwardly to the housing, a force is required to press the battery cover down upon the housing, and then inwardly along a direction toward the antenna rod until locking projections (302) on the cover catch in troughs (182) defined in the housing.

Abstract: A hinge assembly (10) includes a shaft (20), a follower (22), a cam (30), a washer (50), a lubrication mass forming means, and an urging means. The shaft has a securing portion (21) formed at one end thereof. The follower connects with the shaft. The cam essentially is in the shape of a cylinder, and includes a cam surface (32) and defines a cam hole (31) extending therethrough. The cam hole receives the shaft therethrough. The washer defines a center hole (52), and is located around the shaft. The lubrication mass forming means is disposed between the washer and the cam. One end of the urging means abuts the shaft, and an opposite end of the urging means biases the washer. The cam surface of the cam is rotatably and movably engaged with the follower under force of the urging means.

Abstract: A hinge assembly (10) includes a shaft (20), a follower (22), a cam (30), at least one oil storing receptacle (33), and an urging means (40). The shaft has a securing portion (21) formed at a first end thereof. The follower connects with the shaft. The cam is essentially in the shape of a cylinder, and includes a cam surface (32) and defines a cam hole (31) extending therethrough. The cam hole receives the shaft therethrough. In one embodiment, a first end of the urging means abuts an opposite second end of the shaft, and an opposite second end of the urging means biases the cam. Three oil storing receptacles are disposed generally between the cam and the urging means. The cam surface of the cam is rotatably and movably engaged with the follower under force of the urging means.

Abstract: A hinge mechanism includes a shaft (1), at least one cam follower (12), a cam (2), a washer (3) and an elastic member (4). Each cam follower has a projection (120) connected to the shaft. The cam has a cam surface (24) defined thereon. The shaft runs through the cam, the washer and the elastic member, in turn. The cam surface of the cam faces the projection of each cam follower, and the cam abuts the cam follower, due to the spring force generated by the elastic member. The washer and the cam are magnetic, the facing portions thereof having the same polarity. As a result of the repulsive magnetic force between the cam and washer, the hinge mechanism generates a smaller friction therebetween, so the waste of energy is very small. The present hinge mechanism can be used in foldable electronic devices.

Abstract: A hinge assembly includes a shaft (10), a follower (12), a cam (20), at least one rolling member (40), and a spring (50). The follower is connected with the shaft. One of the shaft and the follower has a securing portion (11). The cam is essentially in the shape of a cylinder. The cam has a cam surface (24) and has a cam hole (22) extending therethrough. The cam hole receives the shaft there through. Each rolling member is disposed between the follower and the cam. The first end of the urging means abuts the shaft, while an opposite second end of the urging means biases the cam. The cam surface of the cam is rotatably and movably engaged with each rolling member under the force of the spring.

Abstract: A battery cover assembly includes a battery cover (3) defining a pair of guide rails (326) in an inner surface of the battery cover, a connecting member (2), a housing (1) defining a receiving slot (164) and a battery-receiving compartment (194), a plurality of springs (5, 7), a plurality of sleeves (6), a number of locking pins (7), and an antenna rod (4). The connecting member is loosely received in the guide rails along a lateral direction. Each sleeve includes a first through hole and a second through hole. The connecting member is engaged with each sleeve by using each locking pin inserting into a folded arm of the connecting member and the first through hole, and the antenna rod inserts through the through hole of the sleeve and the receiving slot, such that the battery cover is pivotably connected with the housing.

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 battery cover assembly includes a battery cover (3) defining a pair of guide rails (326) therein, a connecting member (2), a housing (1) defining a receiving slot (164) and a battery-receiving compartment (194), a plurality of springs (5, 7), a plurality of sheaths (6), and an antenna rod (4). The connecting member is engaged with the sheaths and is loosely received in the guide rails along a lateral direction. The antenna rod inserts into the receiving slot through the connecting member, the sheaths, and the springs such that the battery cover can rotate about the antenna rod. When the battery cover is rotated downwardly to the housing, a force is required to press the battery cover down upon the housing, and then inwardly along a direction toward the antenna rod until locking projections (302) on the cover catch in troughs (182) defined in the housing.

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 battery cover assembly includes a battery cover (3) defining a pair of guide rails (326) in an inner surface of the battery cover, a connecting member (2), a housing (1) defining a receiving slot (164) and a battery-receiving compartment (194), a plurality of springs (5, 7), a plurality of sleeves (6), a number of locking pins (7), and an antenna rod (4). The connecting member is loosely received in the guide rails along a lateral direction. Each sleeve includes a first through hole and a second through hole. The connecting member is engaged with each sleeve by using each locking pin inserting into a folded arm of the connecting member and the first through hole, and the antenna rod inserts through the through hole of the sleeve and the receiving slot, such that the battery cover is pivotably connected with the housing.

Abstract: A battery cover assembly includes a battery cover (3) defining guiding slots (326) therein, a connecting member (2), a housing (1) defining a battery-receiving compartment (194), a plurality of springs (5), and a rod (4). The housing includes a left sidewall (16), a partion wall (19), a first step (161) and a second step (163) connecting against the left sidewall, defining a receiving recess (167). The connecting member is slidingly received in the guiding slots along a lateral direction. The rod inserts through the connecting member, the springs, and secured in the receiving recess such that the battery cover can rotate about the rod. When the battery cover is rotated downwardly to the housing, a force is required to press the battery cover down upon the housing, and then inwardly along a direction toward the rod until locking projections (302) on the cover catch in troughs (182) defined in the housing.

Abstract: A battery cover assembly includes a battery cover (3) defining a pair of guide rails (326) therein, a connecting member (2), a housing (1) defining a receiving slot (164) and at least a battery-receiving compartment (194), a plurality of springs (5), and an antenna rod (4). The connecting member is slidingly received in the guide rails along a lateral direction, and the antenna rod inserts into the receiving slot through the connecting member and the springs such that the battery cover can rotate about the antenna rod. When the battery cover is rotated downwardly to the housing, a force is required to press the battery cover down upon the housing, and then inwardly along a direction toward the antenna rod until locking projections (302) on the cover catch in troughs (182) defined in the housing.