A door restraint assembly for inhibiting a door from striking a wall when the door is opened includes a hinge unit that is hingedly coupled between a door and a door frame. A limiting unit is rotatably positioned in the hinge unit. The limiting unit limits rotation of the hinge unit when the door is opened. In this way the limiting unit inhibits the door from striking an adjacent wall when the door is opened.

A foldable electronic device includes a foldable housing including a hinge structure, a first housing structure, a second housing structure, and a hinge housing, a flexible display, and a first detent structure. The first detent structure includes a first member connected to the first housing structure, a second member connected with the second housing structure, a first ball and a second ball disposed in the first member, and an elastic member that is located in the first member between the first ball and the second ball and that presses the first ball and the second ball outward.

A rotation structure includes a first rotating shaft assembly, a second rotating shaft assembly, and a stopper. The first rotating shaft assembly includes a first shaft and a first wheel, a first groove being arranged on the first wheel. The second rotating shaft assembly includes a second shaft and a second wheel, the second shaft and the first shaft satisfying a parallel condition, a second groove being arranged on the second wheel. A first protrusion and a second protrusion are arranged on the stopper, the first protrusion being limited to move in the first groove, the second protrusion being limited to move in the second groove, and the limit of the first groove to the first protrusion and the limit of the second groove to the second protrusion allow one of the first shaft and the second shaft to rotate.

Example implementations relate to cams with non-radial abrasion edges. In some examples, a cam can comprise a first annular surface having an outer radius and an inner radius, a second annular surface having the outer radius and the inner radius, a contact surface connecting the first annular surface to the second annular surface, and a non-radial abrasion edge with respect to the outer radius and the inner radius. The non-radial abrasion edge can be at a distal end of the contact surface.

An adjustable-angle positioning and self-closing hinge has two hinge leaves, a fixing pin, a screw knuckle, a screw ring, a fixing base, and an adjusting base; each leaf of the hinge comprises a knuckle and a leaf fastened outside the knuckle; the fixing pin has a threaded pin; the screw knuckle is fastened inside the knuckle of one of the hinge leaves, the fixing base is fastened inside the knuckle of one of the hinge leaves, and the screw knuckle and the fixing base are spaced separately; between the screw knuckle and fixing base in the knuckles of the two hinge leaves are disposed the fixing pin, the screw ring, two magnets, springs, and the adjusting base; the threaded pin of the fixing pin is screwed to the screw knuckle; a first spring abuts between the fixing pin and the front ring edge and gasket of a cup body.

A rebounding pivot module includes a mounting shaft, and a bouncing device set including a barrel having one end tooth shaped, a connecting tube mounted in the other end of the barrel, a connection rod connected to the connecting tube, a socket and a first guide block mounted onto the connection rod, the first guide block having one end beveled, a bouncing barrel mounted around the connecting rod, a second guide block supported on an elastic member in the bouncing barrel and defining therein a guide hole and having one end tooth shaped and abutted at the beveled edge of the first guide block, and a lock device fastened to connection rod that is inserted through the second guide block, the elastic member and the through hole of the bouncing barrel to lock the bouncing barrel to the connection rod.

A door restraint assembly for inhibiting a door from striking a wall when the door is opened includes a hinge unit that is hingedly coupled between a door and a door frame. A limiting unit is rotatably positioned in the hinge unit. The limiting unit limits rotation of the hinge unit when the door is opened. In this way the limiting unit inhibits the door from striking an adjacent wall when the door is opened.

A hinge structure includes two hinge arms, two shaft gears, at least one first elastic piece, and at least one second elastic piece. Each hinge arm includes a central shaft. Each of the two shaft gears is connected to the central shaft, each shaft gear includes an extending portion, the groove is defined on the extending portion. Each first elastic piece includes two elastic arms, a first connecting portion, and two protrusions. The elastic arms are disposed on opposite sides of the first connecting portion, the elastic arms and the first connecting portion cooperatively form a first opening, the extending portion passes through the first opening, each protrusion is disposed on each elastic arm. Each second elastic piece is sleeved on the extending portion. The protrusions are configured to be accommodated in the groove. A terminal device is provided according to the present disclosure.

One aspect is a detent hinge device having a first cam component with at least one spline and an axial cam face, the first cam component having a root diameter and an outer diameter. A second cam component has at least one spline and an axial cam face, the second cam component having a root diameter and an outer diameter. Each of the first and second cam components are aligned on an axis, wherein the cam faces of the first inner and first outer cam components face each other. An axial spring acts on the first cam component forcing it against the second cam component. An axial retention element securing each of the first and second cam components and axial spring on the axis. A first mounting bracket has splines on an inner surface. The first mounting bracket contains the first cam component such that the splines of the first mounting bracket engage the splines of the first cam component thereby transferring torque from the first cam component to the first mounting bracket via the splines. A second mounting bracket has splines on an inner surface. The second mounting bracket contains the second cam component such that the splines of the second mounting bracket engage the splines of the second cam component thereby transferring torque from the second cam component to the second mounting bracket via the splines. The first and second cam components comprise the same shape.

A refrigerator includes a cabinet that defines a first storage compartment; a first door that is opened or closed to allow or prevent access to an interior of the first storage compartment; a storing device coupled to the first door to define a second storage compartment, wherein, when the first door is closed, the second storage compartment is disposed in the first storage compartment; and a second door connected to the first door and configured to be opened or closed to allow or prevent access to an interior of the second storage compartment, wherein the interior of the second storage compartment is accessible when the first door is closed and the second door is opened, wherein the first door includes a plurality of first coupling parts to which the storing device is coupled, wherein the storing device includes: a frame; and a basket installed on the frame, wherein each of the frame and the basket includes at least one second coupling part interacting with at least one of the plurality of first coupling parts, wherein a front surface of the second door is positioned to be generally coplanar with at least a portion of a front surface of the first door.