The triaxial hinge includes a first hinge shaft attached to a first casing via a first bracket, a second hinge shaft attached to a second casing via a second bracket and a third hinge shaft coupled to one end portion of a first coupling part and one end portion of a second coupling part. Respective other end portions of both coupling parts are attached to the first hinge shaft. There is a gear type synchronous rotation unit for transmitting a rotation of one of the first hinge shaft and the second hinge shaft accompanied by an opening and closing operation of the both casings to the other hinge shaft via the third hinge shaft, which is made to move in a forward and backward direction as accompanied by an opening and closing operation of the both casings.

An electronic device includes a flexible display, a foldable housing, and a flexible display disposed on one surface of the housing. The housing includes a first part, a second part, and a connection unit for connecting the second part to the first part to be relatively movable. The connection unit has hinge members extended substantially in parallel to an edge of the first or second part, arranged between the first part and the second part, and forming part of the one surface of the housing. As the hinge members move relative to each other, the hinge members connect the second part to the first part to enable relative movement of the second part with respect to the first part between a position in which the second part faces the first part and a position in which the second part is leveled next to the first part.

A door hinge assembly is provided which can prevent the phenomenon of closure of an open door by performing a self-stay function, and can improve a worker's or user's convenience and implement a cost saving effect by simplifying the configuration compared to the prior art in which a hinge and a stay are separately provided. To this end, the door hinge assembly includes a hinge shaft, a rotary plate which has one side rotatably connected to the hinge shaft and has the other side connected to a door, and a fixing plate which has one side connected to the hinge shaft and has the other side fixed to a door frame which is formed on the wall surface of an inner space that is opened and closed by the door, wherein the upper end surface of the rotary plate is divided into a reference surface and a stepped surface which has a relatively lower height than the reference surface, and a protrusion part which can be mounted on the reference surface is formed on the outer circumferential surface of the hinge shaft which faces the upper end surface of the rotary plate.

A hinged hold-open assembly for roof ventilator lids is provided, comprising a pair of hinged assemblies attached between the lid and a vent base, wherein each hinged assembly includes a hinge member; a retainer bracket affixed to the vent base, wherein the retainer bracket includes an extended member having a plurality of position holes corresponding to a closed position and a plurality of open positions; a position arm affixed to the lid, wherein the position arm includes a locking hole alignable with one of the position holes of the retainer bracket; and a locking device adapted to insert into both the locking hole and the position hole when said holes are aligned.

An apparatus can include a processor; memory accessible by the processor; a first housing that includes a front side and a back side; a second housing that includes a front side and a back side; and a hinge assembly operatively coupled to the second housing where the hinge assembly includes a set of axles, a set of gears and a latch pivotable via meshed rotation of the gears about an axis defined by one of the axles where, in a latched state, the latch operatively couples the first housing to the hinge assembly.

A multiple-stage positioning structure of dual shafts includes a dual shaft assembly, which includes first and second rotary shafts that are connected to each other with coupling members for being rotated synchronously. The first rotary shaft has a curved section and a planar section. Positioning sleeves are fit over the first and the second rotary shafts. Bearing members bear a positioning bar in such a way to have the planar section of the first rotary shaft in contact engagement with a lateral planar section of the positioning bar. When the first rotary shaft is rotated to have the curved section engage the lateral planar section of the positioning bar, an effect of outward expanding and stretching the positioning sleeves is induced. When the first rotary shaft is rotated to have the planar section re-engage the lateral planar section of the positioning bar, an effect of positioning is induced.

A hinge including a first bracket, a second bracket, a shaft, a fixing element and a position limiting ring is provided. The first bracket includes a first hole and a protrusion protruding from edge of the first hole toward inside of the first hole. The second bracket includes a second hole. The shaft has a cylinder portion passing through the first hole, a fixing portion passing through the second hole, and a first position limiting structure encircling the shaft. The fixing element is disposed at ends of the cylinder portion to fix the shaft to the first bracket. The position limiting ring encircles the shaft and located between the first bracket and the first position limiting structure. The position limiting ring has a second position limiting structure and a recess, the second position limiting structure engages with the first position limiting structure, and the protrusion is located in the recess.

A hinged hold-open assembly for roof ventilator lids is provided, comprising a pair of hinged assemblies attached between the lid and a vent base, wherein each hinged assembly includes a hinge member; a retainer bracket affixed to the vent base, wherein the retainer bracket includes an extended member having a plurality of position holes corresponding to a closed position and a plurality of open positions; a position arm affixed to the lid, wherein the position arm includes a locking hole alignable with one of the position holes of the retainer bracket; and a locking device adapted to insert into both the locking hole and the position hole when said holes are aligned.

A fixation seat having a first guiding element and a second guiding element mounted inside of a hinge mechanism is mounted at a wall or a frame's surface. A first guided assembly and a second guided assembly are mounted at the fixation seat and respectively guided by the first guiding element and the second guiding element to move away from each other or move back. A movable assembly comprises a movable and pivotable shaft mounted through the fixation seat and optionally connected to the first guided assembly or the second guided assembly. A door is mounted at the movable assembly and pivots relative to the surface through the shaft. The movable assembly lifts and lowers the door via the shaft, connected one of the guided assemblies, guided by the guiding elements, so the hinge mechanism is adaptable to install the door at left-side or right-side surfaces.

In one embodiment an electronic device comprises a housing having a first section and a second section comprising a display coupled to the first section by a hinge assembly, a rotation control assembly to control rotation of the hinge assembly, and a controller to activate the rotation control assembly in response to detection of a force condition at a second section of the housing of an electronic device. Other embodiments may be described.