A hinge module includes a joint assembly, a first pivot, and a second pivot. The joint assembly includes a first joint washer, a second joint washer separate from and coplanar with the first joint washer, an interlock member having two elongated limiting holes, and two pins. The first joint washer has a first pivot hole and a first pin hole. The second joint washer has a second pivot hole and a second pin hole. The pins are respectively inserted into the first and second pin holes and movably pass through the limiting holes. The first and second pivots respectively pass through the first and second pivot holes. When the first joint washer is rotated around the first pivot, the corresponding pin moves the interlock member in a direction perpendicular to each limiting hole, thereby moving the other pin to rotate the second joint washer around the second pivot.

Technologies for hinges on mobile compute devices with dual screens are disclosed. In the illustrative embodiment, the mobile compute device with two housings each having a display are connected to each other by a hinge with elliptical spur gears that allow for one housing with a display to be rotated 360 degrees relative to the other housing. The elliptical shape of the spur gears allows the separation between the gears to change as one housing is rotated and, in particular, allows a smaller separation between the gears in certain configurations of the mobile compute device. The illustrative hinge includes a mechanical linkage system that allows the hinge to expand and contract as one housing is rotated.

A rollable display device includes: a panel support including a plurality of support bars arranged in a direction and a plurality of flexible coupling portions between support bars of the plurality of support bars and coupling the plurality of support bars together; and a flexible display panel fixed to respective front sides of support bars of the plurality of support bars, and the plurality of support bars includes a first support bar that is spaced apart from an outermost support bar of the plurality of support bars, and the first support bar includes a pair of first holding bars that are spreadable toward an outside from a rear side of the first support bar.

A pivot device having asymmetric friction torque is provided. The pivot device includes a shaft extending along a longitudinal axis, a sleeve surrounding the shaft, the sleeve defining a gap extending longitudinally, the sleeve and the shaft being configured for rotation with respect to one another about the longitudinal axis, and a helical compression element surrounding the sleeve and exerting a compressive force onto the sleeve, wherein a first torque required to rotate the sleeve and the shaft with respect to one another in a first direction differs from a second torque required to rotate the sleeve and the shaft with respect to one another in a second direction opposite to the first direction. A method for providing a pivot device asymmetric friction torque is also provided.

A rotation unit includes a first rotor, a second rotor coupled to the first rotor, and a third rotor coupled to the second rotor. The second rotor has reflection-symmetric structure, and the first rotor and the third rotor are reflection-symmetric to each other with respect to the second rotor. Each of the first rotor, the second rotor, and the third rotor includes one or more grooves and one or more pins. In response to the pins moving in the corresponding grooves, a length of a first face formed by inner faces of the first rotor, the second rotor, and the third rotor in the groove direction remains unchanged, and a length of a second face formed by outer faces of the first rotor, the second rotor, and the third rotor in the groove direction varies.

A device includes a sensor and an actuator. The sensor has a receiving circuit with a sensor and a detector, as well as a computer connected to the detector. The sensor cooperates with the actuator to generate a first receiving circuit signal during a normal operation when a switching distance between the sensor and the actuator is undershot. The detector generates a first output signal as a function of the first receiving circuit signal, and to transmit transmits the first output signal to the computer. The receiving circuit includes a signal emulator and a switch-over element. The signal emulator generates a second receiving circuit signal during a test operation. The detector generates a second output signal as a function of the second receiving circuit signal and transmits the second output signal to the computer. The device can repeatedly switch between normal operation and test operation.

A dual-shaft hinge and an electronic device are provided. The dual-shaft hinge includes a first rotating shaft, a second rotating shaft, a fixing assembly, a torque element, and a first carrier plate. The fixing assembly has first via, second via, and a first locating hole. The first rotating shaft is inserted in the first via, and the second rotating shaft is inserted in the second via. The torque element has a connection portion, a first torque providing portion and a second torque providing portion extending from two opposite sides of the connection portion, and a first positioning protruding portion and a second positioning protruding portion extending from the other two opposite sides of the connection portion. The first rotating shaft is inserted in a first hole groove, and the second rotating shaft is inserted in a second hole groove. The first positioning protruding portion is inserted in the first locating hole. The first carrier plate has a first through hole, a second through hole, and a second locating hole. The first rotating shaft is inserted in the first through hole, the second rotating shaft is inserted in the second through hole, and the second positioning protruding portion is inserted in the second locating hole.

A stamping tool is provided including a base and a cover. The cover is removably affixed to the base through a hinging assembly. The base can include a first base hinge and a second base hinge substantially perpendicular to the first base hinge. The base hinges can be one or more hinge sections. The hinge sections can include a first wall and a second wall that can be biased to define a cavity that is accessible through a channel between the first wall and the second wall. Hinge sections can be separated by one or more receptacles. The cover can include one or more hinge bars corresponding to the hinge sections on the base. The hinge bars can have an unequal aspect ratio allowing for easy insertion and removal of the cover. The cover can also include one or more protrusions separating the hinge bars. These protrusions correspond to the receptacles on the base. A method of stamping an article is also included wherein the stamping tool is provided. The cover is placed in an open position relative to the base. A stamp is adhered to the bottom surface of the cover. The article to be stamped is placed on the top surface of the base. A quantity of ink is applied to the stamp and, as the cover is placed in a closed position, the stamp is brought into contact with the article thereby stamping the article with the ink.

According to one embodiment, an electronic apparatus includes a first casing, a second casing, and a hinge which couples them rotatably from a first state to a second state. The hinge includes a first shaft, a first rotation engaging portion, a second shaft, a second rotation engaging portion, a housing, and a transmission unit. The transmission unit links the first engaging portion and the second engaging portion and rotates them with respect to a rotation angle of the housing from the first state to the second state.

A double jointed hinge mechanism for pivotally coupling a door to a telecommunications chassis includes an first hinge arm configured to be non-rotatably attached to the chassis, a second hinge arm non-rotatably attached to the door, and a third hinge arm pivotally attached to the first and second hinge arms. The hinge mechanism is configured such that the door can be placed in a first open position and a second open position through rotation about first and second rotational axes. In the first open position, the door is in a generally horizontal position and below the first rotational axis. In the second open position, the door is in a generally vertical position and forward of a vertical plane defined by the first rotational axis.