An opening/closing structure of a cover includes a casing and a rotatable cover. A shaft part and a bearing part are formed to one and the other of the casing and the cover, respectively. One of the shaft part and the bearing part is formed with one of a protrusion and a relief part on a part of an end surface in an axial direction, and the other of the shaft part and the bearing part is formed with the other of the protrusion and the relief part on a facing surface facing the end surface. The protrusion circumvents contact with the surface having the relief part when the cover is closed. When the cover is opened, from the closed state, by a particular angle, the protrusion contacts the surface so as to be applied with a resistant force against rotation of the cover.

A cabinet may include a top surface and a front side allowing access to an interior of the cabinet. The cabinet may also include a front panel, which may have a flat surface that is larger than the top surface. The front panel may be pivotable between a first configuration, in which the front panel is a vertical panel closing the front side, and a second configuration, in which the front panel forms a horizontal table top.

An assembly has a liftable lid and a movable hinge module. The assembly includes an object having an opening, a lid rotatably arranged upon the opening, and a hinge module. The hinge module includes at least a shaft connected to the lid, a base, and at least a latch. The shaft is connected to the base and along with the base defines a rotating axis. The rotating axis is movably arranged between a close position and an open position. The latch fastens the lid over the opening. When the rotating axis is at close position, the lid closes upon the opening as a close state. When the rotating axis moves away from close position, the lid rotates and moves away from the opening to an open state. The rotating axis moves to open position.

An opening/closing structure of a cover includes a casing and a rotatable cover. A shaft part and a bearing part are formed to one and the other of the casing and the cover, respectively. One of the shaft part and the bearing part is formed with one of a protrusion and a relief part on a part of an end surface in an axial direction, and the other of the shaft part and the bearing part is formed with the other of the protrusion and the relief part on a facing surface facing the end surface. The protrusion circumvents contact with the surface having the relief part when the cover is closed. When the cover is opened, from the closed state, by a particular angle, the protrusion contacts the surface so as to be applied with a resistant force against rotation of the cover.

An opening/closing structure of a cover includes a casing and a rotatable cover. A shaft part and a bearing part are formed to one and the other of the casing and the cover, respectively. One of the shaft part and the bearing part is formed with one of a protrusion and a relief part on a part of an end surface in an axial direction, and the other of the shaft part and the bearing part is formed with the other of the protrusion and the relief part on a facing surface facing the end surface. The protrusion circumvents contact with the surface having the relief part when the cover is closed. When the cover is opened, from the closed state, by a particular angle, the protrusion contacts the surface so as to be applied with a resistant force against rotation of the cover.

An opening/closing structure of a cover includes a casing and a rotatable cover. A shaft part and a bearing part are formed to one and the other of the casing and the cover, respectively. One of the shaft part and the bearing part is formed with one of a protrusion and a relief part on a part of an end surface in an axial direction, and the other of the shaft part and the bearing part is formed with the other of the protrusion and the relief part on a facing surface facing the end surface. The protrusion circumvents contact with the surface having the relief part when the cover is closed. When the cover is opened, from the closed state, by a particular angle, the protrusion contacts the surface so as to be applied with a resistant force against rotation of the cover.