Abstract: An exemplary hinge assembly (30) includes a main mount (302), a pivot shaft (304), two active friction pieces (308, 309), two fixed friction pieces (306, 307), an elastic assembly (310, 311), and a fixing member (314). The active friction pieces are non-rotatably surrounded on the pivot shaft. The fixed friction pieces are rotatably surrounded on the pivot shaft. One fixed friction piece and one active friction piece are disposed at one side of the main mount and abutting each other. The other fixed friction piece and the other active friction piece are disposed at an opposite side of the main mount and abutting each other. The elastic assembly is surrounded on the pivot shaft and is configured to provide axial force. The fixing member is mounted at one end of the pivot shaft.

Abstract: An exemplary hinge assembly for use in a flat display monitor includes a support member, a rotational base and a pivot mechanism for rotatably connecting the rotational base to the support member. The support member includes two first sidewalls, a first resisting surface and a second resisting surface. Each first sidewall defines a pivoting hole. The pivot mechanism includes a pivotal shaft, a limiting washer and a fixing element. The pivotal shaft includes a shaft portion running through the pivoting hole. The pivotal shaft is non-rotatable relative to the support member. The limiting washer includes a first restricting surface and a second restricting surface.

Abstract: An exemplary hinge assembly (300) for use in a flat display monitor (400) includes a support member (10), a rotatable base (20) and a pivot mechanism (30) for rotatably attaching the rotatable base and the support member together. The rotatable base includes a fixed board (22) and a side board (24) disposed at an end of the fixed board, and the side board forms a stopper (244). The pivot mechanism is rotatably connected to the rotatable base and non-rotatably connected to the support member. The pivot mechanism includes a pivotal shaft. The pivotal shaft defines a limited guide groove (3013) configured for blocking the stopper of the side board so that a range of rotation of the rotatable base relative to the support member is between a first utmost position and a second utmost position.

Abstract: An exemplary hinge assembly includes a hollow housing (100), a shaft (300), an urging mechanism (400), a cam (500), and a follower (700). The housing includes an open end, and a hole (104) in an opposite second end. A peripheral wall of the housing at the open end defines two pinholes (112). The shaft 300 includes a fixing portion and a stopper portion (204). The urging mechanism is received in the housing and located around the shaft. The cam defines a cam hole (506) therethrough, and includes a cam portion (502) received in the housing. One end of the cam portion has a cam surface (508). The cam hole engagingly receives the shaft, so that the cam rotates with the shaft. The urging mechanism biases the cam. The follower is fixed in the pinholes. The follower rotates relative to the shaft, and is movably engaged with the cam surface.

Abstract: An exemplary swivel hinge assembly (10) includes a main body (10), a pivot mechanism (16) and a swivel mechanism. The pivot mechanism is connected to the main body and configured to provide the swivel hinge assembly with rotation about a first rotational axis. The swivel mechanism is configured to provide the swivel hinge assembly with rotation about a second rotational axis. The swivel mechanism includes a pivot shaft (189), a friction piece (184) and a pair of elastic pieces (188). The second pivot shaft is rotatably extended through the main body. The friction piece is non-rotatably mounted on the pivot shaft. The elastic pieces are mounted on the main body and elastically resist the friction piece.

Abstract: An exemplary swivel hinge assembly (100) includes a main body (12), a pivot mechanism (16) and a swivel mechanism (15). The swivel mechanism includes a rotatable member (182), a fixing member (184), two bearing balls (185), an elastic piece (186), and a second pivot shaft (189). The rotatable member defines two first bearing grooves (1820). The fixing member defines two second bearing grooves corresponding to the first grooves. The bearing balls are disposed between the rotatable member and the fixing member, and are partly received in the second bearing grooves. The elastic piece is mounted on the main body, elastically resisting the fixing member. The second pivot shaft extends through the main body, the elastic piece, the fixing member, and the rotatable member, and is rotatable relative to the elastic piece, the main body, and the fixing member.

Abstract: An exemplary hinge assembly (100) includes a first body (10), a follower (30), a second body (60), and an elastic element (50). The first body includes a shaft portion (13) and a friction portion (20) located around the shaft portion. The friction portion is non-rotatable relative to the shaft portion. The friction portion includes a curved friction surface (23). The follower includes a curved follower surface (311) and a locking portion (33). The follower is located around the shaft portion and is rotatable relative to the shaft portion. The second body includes a locking portion (616). The locking portion of the follower is engaged in the locking portion of the second body to prevent the follower from rotating relative to the second body. The elastic element is located between the follower and the second body, so as to bias the follower surface against the friction surface.

Abstract: An exemplary hinge assembly (300) for use in a flat display monitor includes a support member (10), a rotational base (20) and a pivot mechanism (30) for rotatably connecting the rotational base to the support member. The rotational base includes a fixing board (22) and a side board (24) disposed at an end of the fixing board, the side board defining an engaging hole (242) and forming an inwardly bent portion (240) at a distal end edge thereof. The support member includes an extending seat (16) defining a round pivoting hole (1601), and a retaining portion (161) extending from an exterior side of the extending seat. The retaining portion of the side board is configured for blocking the inwardly bent portion of the side board so that a range of rotation of the rotational base relative to the support member is between a first utmost position and a second utmost position.

Abstract: A hinge assembly (300) for use in a flat display monitor includes a support member (10), a rotational bracket (20) and a pivot mechanism (30) for rotatably connecting the rotational bracket to the support member. The support member includes an extending seat (16) defining a restricting groove (162) thereof. The pivot mechanism includes a pivotal shaft (301), a torsion spring (302), and a stop (303). The torsion spring is disposed around the pivotal shaft for providing torsion force. The pivotal shaft is fixedly connected to the rotational bracket and rotatably connected to the rotational bracket. The stop is fixed at end of the pivotal shaft and is rotatable in the restricting groove corresponding to rotation of the rotational bracket relative to the support member, with the stop being rotatable between a first utmost position and a second utmost position.

Abstract: A hinge assembly includes a hollow housing (100), a shaft (300), an urging mechanism (400), a cam (500), and a cylindrical follower (700). The housing includes an open end, and a hole (104) in an opposite second end. A peripheral wall of the housing at the open end defines a pair of pinholes (112). The shaft 300 includes a fixing portion. The urging mechanism is received in the housing and located around the shaft. The cam defines a cam hole (506) therethrough, and includes a cam portion (502) received in the housing. One end of the cam portion has a cam surface (508). The cam hole engagingly receives the shaft, so that the cam rotates with the shaft. The opposite end of the urging mechanism biases the cam. The follower is retained in the pinholes. The follower rotates relative to the shaft and is movably engaged with the cam surface.

Abstract: A hinge assembly includes a hollow housing (100), a shaft (300), an urging mechanism (400), a cam (500), and a follower (700). The housing includes an open end, and a hole (104) in an opposite second end. A peripheral wall of the housing at the open end defines a pair of pinholes (112). The shaft 300 includes a fixing portion. The urging mechanism is received in the housing and located around the shaft. The cam defines a cam hole (506) therethrough, and includes a cam portion (502) received in the housing. One end of the cam portion has a cam surface (508). The cam hole engagingly receives the shaft, so that the cam rotates with the shaft. The opposite end of the urging mechanism biases the cam. The follower is fixed in the pinholes. The follower rotates relative to the shaft and is movably engaged with the cam surface.

Abstract: A hinge mechanism includes a shaft (1), a cam (2), a housing (3), an arresting member (6), a cam follower (4), and an elastic member (5). The housing has an open housing end (30), and an opposite partially open housing end (31) including a transverse wall (35). The cam, the cam follower, the elastic member and the arresting member surround the shaft in turn. The cam follower and the elastic member are received in the housing. The cam is partly received in the housing. The transverse wall of the partially open housing end of the housing prevents the cam from sliding further into the housing. The arresting member is disposed adjacent to the open housing end allowing the arresting member sliding into the housing. The cam is rotatable relative to the shaft and non-rotatable relative to the housing, and the cam follower is non-rotatable relative to the shaft.

Abstract: A hinge assembly (100) includes a shaft (10), a rotary cam (20), a follower cam (30), a positioning member (50), and an urging means (40). The shaft includes a securing portion (12) at one end thereof and has a slot (166) defined therealong. The rotary cam is substantially cylindrical and includes a cam surface (24). The rotary cam has a cam hole (22) extending therethrough. The cam hole receives the shaft therethrough. The follower cam includes a cylindrical portion (34) and two symmetrically protruding portions (36). The cylindrical portion includes a pinhole (346). The positioning member is received in the pinhole and the slot, thereby connecting the follower cam and shaft. The urging means biases against both the shaft and the rotary cam. The cam surface of the rotary cam is rotatably engaged with the protruding portion of the follower cam under a force generated by the urging means.

Abstract: A hinge assembly (100) includes a can (10), a fixed cam (20), a sliding cam (40), a compression spring (50), a fixing member (60), and a shaft (30). The can has a center cavity (1031) and a board (103) provided at one end thereof. The fixed cam has a central hole (204) and a groove. The fixed cam is partly received in the can and the board of the can is engaged in the groove. The sliding cam abuts the fixed cam. The sliding cam has a center cavity (403). The compression spring is interposed between the sliding cam and the fixing member. A first end of the shaft is engaged with the fixed cam, and extends the hole of the fixed cam, the cavity of the can, the cavity of the sliding cam and the compression spring. The fixing member is fixed to an second end of the shaft.

Abstract: A hinge mechanism (500) includes a shaft (1), a cam (2), a housing (3), a cam follower (4), and an elastic member (5). The shaft has a pair of shaft ends. The cam has a cam tip. The housing has an open end and a hole defined at an opposite end. The cam follower has a cam surface configured to engage with the cam tip. The cam, the cam follower and the elastic member surround the shaft in turn. The cam follower and the elastic member are received in the housing, while the cam is partly received in the housing. The cam is rotatable relative to the shaft and non-rotatable relative to the housing, and the cam follower is slidable and non-rotatable relative to the shaft. The hinge mechanism is easily assembled, and modularized for convenient installation into a main housing and a cover of a foldable electronic device.

Abstract: A hinge assembly includes a hollow housing (100), a shaft (300), an urging mechanism (400), a cam (500), and a cylindrical follower (700). The housing includes an open end, and a hole (104) in an opposite second end. A peripheral wall of the housing at the open end defines a pair of pinholes (112). The shaft 300 includes a fixing portion. The urging mechanism is received in the housing and located around the shaft. The cam defines a cam hole (506) therethrough, and includes a cam portion (502) received in the housing. One end of the cam portion has a cam surface (508). The cam hole engagingly receives the shaft, so that the cam rotates with the shaft. The opposite end of the urging mechanism biases the cam. The follower is retained in the pinholes. The follower rotates relative to the shaft and is movably engaged with the cam surface.