A transmission shaft set including a plurality of transmission shaft structures is disclosed. Each transmission shaft structure includes a metal pin connecting shaft and a base. The metal pin connecting shaft includes an arc part, a fastening block, a plurality of electrically connecting parts and a plurality of electrically connecting metal pins. The plurality of electrically connecting parts are located on the arc part. The plurality of electrically connecting metal pins are located in the fastening block and electrically connected to the plurality of electrically connecting parts. The base is fastened to the metal pin connecting shaft and includes a fastening groove, at least one fastening part and at least one column. The fastening groove is used for fastening the fastening block. The fastening part is located near the fastening groove. The column is located near the fastening groove and the fastening part.

A transmission shaft set including a plurality of transmission shaft structures is disclosed. Each transmission shaft structure includes a metal pin connecting shaft and a base. The metal pin connecting shaft includes an arc part, a fastening block, a plurality of electrically connecting parts and a plurality of electrically connecting metal pins. The plurality of electrically connecting parts are located on the arc part. The plurality of electrically connecting metal pins are located in the fastening block and electrically connected to the plurality of electrically connecting parts. The base is fastened to the metal pin connecting shaft and includes a fastening groove, at least one fastening part and at least one column. The fastening groove is used for fastening the fastening block. The fastening part is located near the fastening groove. The column is located near the fastening groove and the fastening part.

An electrical connection box includes a housing member, a first cover member, a second cover member, a hinge structure between the first and the second cover members, and a detachment prevention structure that disables detachment of the second cover member from the first cover member. The hinge structure includes a rotation shaft of the first cover member, a bearing of the second cover member, and a through hole in the first cover member. The through hole allows the bearing to be inserted from a free end and move in a direction that intersects an insertion direction of the bearing and is perpendicular to the axial direction of the rotation shaft to be fitted to the rotation shaft. The detachment prevention structure includes a rotational retaining section of the bearing and a retainer of the housing member.

A molded access door assembly for an access opening in a wall or ceiling is provided. It includes a molded frame with a frame channel forming the outside of the access door assembly. The frame channel has spaced apart exterior and interior walls joined at the top edge by a top wall and a lip extending from the bottom edge of the inner wall into the interior of the molded access door assembly to define an opening. The lip provides a stop rest for the door in the closed position so that the door is capable of being attached to the wall or ceiling. The assembly also includes a door having a top surface and a first part of a hinge assembly along one edge of the top surface which cooperates with a matching second part of the hinge assembly along one edge of the frame channel to allow the door to move between an open and a closed position.

An electronic device and accessory device are disclosed. The devices may be designed to magnetically couple together. Accordingly, each device may include one or more magnets that magnetically couple. In order to maintain the magnetic coupling and resist some at least some force or forces acting on, for example, the accessory device, the magnets may include a shape designed to increase the amount of force required to move the magnets in the accessory device relative to the magnets in the electronic device. The shape of the magnets may include polygonal shapes such as a trapezoid or a triangle. Magnets, having a trapezoidal or a triangular shape, magnetically couple with one another, may provide a stronger counterforce to lateral forces acting on the magnets.

A computing device is movable into an airplane mode. A spine on a hinge connects a display to a keyboard. The back surface of the keyboard includes keyboard magnetic material and the spine include spine magnetic material. The spine magnetic material is magnetically attracted to the keyboard. In the airplane mode, the spine is magnetically connected to the keyboard such that the display is secured relative to the keyboard.

A computing device is movable into an airplane mode. A spine on a hinge connects a display to a keyboard. The back surface of the keyboard includes keyboard magnetic material and the spine include spine magnetic material. The spine magnetic material is magnetically attracted to the keyboard. In the airplane mode, the spine is magnetically connected to the keyboard such that the display is secured relative to the keyboard.

Disclosed is a modular building system including, in some embodiments, one or more wall panels, one or more floor panels, and one or more roof panels. The modular building components of the modular building system including the one or more wall panels, the one or more floor panels, and the one or more roof panels can form housing or storage structures with electrical wiring, plumbing, or both wiring and plumbing. The housing or storage structures can be erected by one or more persons without a need for a plumber, an electrician, or power tools. Also disclosed is a method for erecting one or more housing or storage structure in accordance with the modular building system.

A silicone extruded spring strap that has the possibility to be folded around an axis parallel to its own axis of extrusion, thus creating the compression and release as of a spring. The base has a reach-in hole on its body to allow the user to reach through. The lid is the base's capping object; it is designed to cover the reach-in hole of the base. It should be designed in a way to limit the area of the remaining gaps of the base's reach-in hole. The spring strap clip designed to allow the extension of the spring during the closing motion of the lid. The extruded spring strap can store and release energy in order to displace the lid. It can be of any material that provides the appropriate stiffness to activate the lid. The retention latch is the user interface on which he acts in order to have the lid popup.

A hinge assembly includes a first hinge member having an arcuate guide slot extending around a first opening and an overall thickness equal to or greater than a radial width of the arcuate guide slot, and a second hinge member having first and second clevis portions with a second opening formed through each of the clevis portions. Fastening member holes are defined in one or both clevis portions and arrayed in a first arcuate array around one or both of the second openings with a radius corresponding to the arcuate guide slot radius. The first hinge member is inserted between the clevis portions with the first and second openings aligned with each other. Fastening members extend into or through the fastening member holes and are slidably received in the arcuate guide slot so as to enable relative rotation between the hinge members about an axis passing through the first and second openings.