A rod assembly includes a turnbuckle that extends along a central axis, a first rod that is to be screwed into a first adjustment hole of the turnbuckle, a second rod that is to be screwed into a second adjustment hole of the turnbuckle, a first nut that is fitted to a first adjustment end portion of the first rod, and a second nut that is fitted to a second adjustment end portion of the second rod. A first turnbuckle-welded portion is provided between the first nut and the turnbuckle, and a second turnbuckle-welded portion is provided between the second nut and the turnbuckle. A first rod-welded portion is provided between the first nut and the first rod, and a second rod-welded portion is provided between the second nut and the second rod.

An accessory device for an electronic device is disclosed. The accessory device includes multiple sections, with one section holding the electronic device, and another section having an input mechanism, such as a keyboard. The accessory device includes a hinge assembly that allows relative movement of the sections with respect each other. An additional hinge assembly is integrated with the section carrying the electronic device, and provides additional flexibility and range of motion of the section, thereby allowing a user to position the electronic device at multiple different angles relative to the section carrying the input mechanism. Also, each hinge assembly may include multiple roller and spacer elements, as well as a retention structure passing through each roller element and spacer element. The retention structure can provide tension to increase the frictional force between the roller and spacer elements, and/or provide counterbalance to offset the weight of the electronic device.

An accessory device for an electronic device is disclosed. The accessory device includes multiple sections, with one section holding the electronic device, and another section having an input mechanism, such as a keyboard. The accessory device includes a hinge assembly that allows relative movement of the sections with respect each other. An additional hinge assembly is integrated with the section carrying the electronic device, and provides additional flexibility and range of motion of the section, thereby allowing a user to position the electronic device at multiple different angles relative to the section carrying the input mechanism. Also, each hinge assembly may include multiple roller and spacer elements, as well as a retention structure passing through each roller element and spacer element. The retention structure can provide tension to increase the frictional force between the roller and spacer elements, and/or provide counterbalance to offset the weight of the electronic device.

Solar trackers that may be advantageously employed on sloped and/or variable terrain to rotate solar panels to track motion of the sun across the sky include bearing assemblies and other mechanical features configured to address mechanical challenges posed by the sloped and/or variable terrain that might otherwise prevent or complicate use of solar trackers on such terrain.

Solar trackers that may be advantageously employed on sloped and/or variable terrain to rotate solar panels to track motion of the sun across the sky include bearing assemblies and other mechanical features configured to address mechanical challenges posed by the sloped and/or variable terrain that might otherwise prevent or complicate use of solar trackers on such terrain.

An electronic device is disclosed. The electronic device may include: a body provided with a computing system; a hinge assembly adjacent to one side of the body and installed inside of the body; and a display part including a display panel for displaying a screen, wherein the display part is pivotable with respect to the body and is connected to the hinge assembly, wherein the hinge assembly may include: a hinge shaft; a first coupling part adjacent to one end of the hinge shaft, extended from an outer circumferential surface of the hinge shaft, and fixed to the display part; a second coupling part rotatably coupled to the hinge shaft and that is fixed to the body; and a foot plate pivotably coupled to the second coupling part and pivotable with the second coupling part according to the rotation of the hinge shaft.

An assembly for converting motion comprises a first arm rotatable at a first position about a first fixed pivot; a second arm rotatable at a first position about a second fixed pivot; a third arm linked at a first position to the second arm at a second position on the second arm, the third arm being linked at a second position to the first arm at a second position on the first arm; wherein one of the first and second positions on the third arm is moveable and the other of the first and second positions is fixed relative to the third arm; and a connecting arm extending between the first arm and the second arm, the connecting arm pivotably connected at a first position to a third position on the first arm and pivotably connected at a second position to the second position on the second arm.

An assembly for converting motion comprises a first arm rotatable at a first position about a first fixed pivot; a second arm rotatable at a first position about a second fixed pivot; a third arm linked at a first position to the second arm at a second position on the second arm, the third arm being linked at a second position to the first arm at a second position on the first arm; wherein one of the first and second positions on the third arm is moveable and the other of the first and second positions is fixed relative to the third arm; and a connecting arm extending between the first arm and the second arm, the connecting arm pivotably connected at a first position to a third position on the first arm and pivotably connected at a second position to the second position on the second arm.

A supporting assembly comprises a first body having a first surface, a second body having a second surface, a third body having a third surface, a fourth body having a fourth surface, a first hinge member, and a second hinge member. The first hinge member is hinged to the first body and the second body. The second hinge member is hinged to the second body and the third body. The fourth body has hinged to and between the second body and the third body.

A supporting assembly comprises a first body having a first surface, a second body having a second surface, a third body having a third surface, a fourth body having a fourth surface, a first hinge member, and a second hinge member. The first hinge member is hinged to the first body and the second body. The second hinge member is hinged to the second body and the third body. The fourth body has hinged to and between the second body and the third body.