A concealed hinge with V-shaped rotating shafts includes an upper leaf (6) and an upper support arm (4) that are hinged to a secondary hinge (1), and a lower leaf (7) and a lower support arm (5) that are hinged to a primary hinge (8). The upper leaf (6) is hinged to the lower leaf (7). The upper support arm (4) is hinged to the lower support arm (5). A hinged joint at an end of the upper leaf (6) is connected, by means of a shaft (2), to a hinged seat secured to the secondary hinge (1). A hinged joint at one end of the lower leaf (7) is connected, by means of a shaft (2), to a hinged seat secured to the primary hinge (8), and a hinged joint at the other end of the lower leaf (7) is connected to the upper leaf (6) by means of a shared shaft (3). One end of the upper support arm (4) is connected, by means of a side shaft (10), to the hinged seat secured to the secondary hinge (1), and a hinged joint at the other end of the upper support arm (4) is connected to the lower support arm (5) by means of a longitudinal shared shaft (11). A hinged joint at an end of the lower support arm (5) is connected, by means of a side shaft (10), to the hinged seat secured to the primary hinge (8). The concealed hinge is reasonable in structure design, simple and convenient to mount, safe and capable of preventing burglary, extensive in application, small in space usage and convenient to mount and transport, and has good appearance.

A concealed hinge with V-shaped rotating shafts includes an upper leaf (6) and an upper support arm (4) that are hinged to a secondary hinge (1), and a lower leaf (7) and a lower support arm (5) that are hinged to a primary hinge (8). The upper leaf (6) is hinged to the lower leaf (7). The upper support arm (4) is hinged to the lower support arm (5). A hinged joint at an end of the upper leaf (6) is connected, by means of a shaft (2), to a hinged seat secured to the secondary hinge (1). A hinged joint at one end of the lower leaf (7) is connected, by means of a shaft (2), to a hinged seat secured to the primary hinge (8), and a hinged joint at the other end of the lower leaf (7) is connected to the upper leaf (6) by means of a shared shaft (3). One end of the upper support arm (4) is connected, by means of a side shaft (10), to the hinged seat secured to the secondary hinge (1), and a hinged joint at the other end of the upper support arm (4) is connected to the lower support arm (5) by means of a longitudinal shared shaft (11). A hinged joint at an end of the lower support arm (5) is connected, by means of a side shaft (10), to the hinged seat secured to the primary hinge (8). The concealed hinge is reasonable in structure design, simple and convenient to mount, safe and capable of preventing burglary, extensive in application, small in space usage and convenient to mount and transport, and has good appearance.

A hinged mechanism includes: panels; and hinges connecting respective pairs of the panels to each other in a closed loop so that the hinged mechanism is non-planar, wherein at least one of the hinges is a rolling-contact hinge. All of the hinges can be rolling-contact hinges. The closed-loop hinged mechanism can comprise at least four hinges, each of the at least four hinges being a sole connection between a respective adjacent pair of the panels. A cross section of rolling surfaces of the rolling-contact hinge can be circular. A cross section of rolling surfaces of the rolling-contact hinge can be non-circular.

A hinged mechanism includes: panels; and hinges connecting respective pairs of the panels to each other in a closed loop so that the hinged mechanism is non-planar, wherein at least one of the hinges is a rolling-contact hinge. All of the hinges can be rolling-contact hinges. The closed-loop hinged mechanism can comprise at least four hinges, each of the at least four hinges being a sole connection between a respective adjacent pair of the panels. A cross section of rolling surfaces of the rolling-contact hinge can be circular. A cross section of rolling surfaces of the rolling-contact hinge can be non-circular.

The present invention relates to a cover apparatus for a truck cargo box, and more specifically to a cover apparatus for a truck cargo box, which enables stable opening and closing operations even when deformation occurs due to the deflection or warping of a truck cargo box and enables its covers to stably cover irregularly shaped loads, such as various types of wastes or scraps, thereby considerably improving transportation safety and the convenience of use. According to the present invention, there is provided the cover apparatus for a truck cargo box, which enables stable opening and closing operations via the hinges and the variable members, and enables its covers to stably cover irregularly shaped loads via the covers in each of which the plurality of blocks is connected to each other, thereby providing the effect of considerably improving transportation safety and the convenience of use.

The present invention relates to a cover apparatus for a truck cargo box, and more specifically to a cover apparatus for a truck cargo box, which enables stable opening and closing operations even when deformation occurs due to the deflection or warping of a truck cargo box and enables its covers to stably cover irregularly shaped loads, such as various types of wastes or scraps, thereby considerably improving transportation safety and the convenience of use. According to the present invention, there is provided the cover apparatus for a truck cargo box, which enables stable opening and closing operations via the hinges and the variable members, and enables its covers to stably cover irregularly shaped loads via the covers in each of which the plurality of blocks is connected to each other, thereby providing the effect of considerably improving transportation safety and the convenience of use.

In general, a multifunctional exercise device includes a first lateral slide component and a second lateral slide component. The multifunctional exercise device includes a hinge assembly with a first pivotal hinge piece connected to the first lateral slide component at a first side pivot point and a second pivotal hinge piece connected to the second lateral slide component at a second side pivot point. A first pin is adapted to retain the first pivotal hinge piece and second pivotal bracket piece in a connected, pivotal position at a center pivot. A first slidable hand grip adapted to slide along the first lateral slide component and a second slidable hand grip adapted to slide along the second lateral slide component are also included. First and second adjustable feet are provided for allowing the first lateral slide component and the second lateral slide component to be adjusted to various equal or unequal heights.

In general, a multifunctional exercise device includes a first lateral slide component and a second lateral slide component. The multifunctional exercise device includes a hinge assembly with a first pivotal hinge piece connected to the first lateral slide component at a first side pivot point and a second pivotal hinge piece connected to the second lateral slide component at a second side pivot point. A first pin is adapted to retain the first pivotal hinge piece and second pivotal bracket piece in a connected, pivotal position at a center pivot. A first slidable hand grip adapted to slide along the first lateral slide component and a second slidable hand grip adapted to slide along the second lateral slide component are also included. First and second adjustable feet are provided for allowing the first lateral slide component and the second lateral slide component to be adjusted to various equal or unequal heights.

A furniture hinge includes a body-side main element and a hinge cup, which is pivotally guided relative to the base element and which can be secured to a movable furniture part. The main element and the hinge cup are connected together via a lever mechanism. The furniture hinge is configured so that the lever mechanism has at least two levers, each of which is mounted on the hinge cup in a pivotal manner about a pivot axis that is aligned perpendicularly to the pivot axis of the hinge cup and each of which is provided with a toothing that meshes with another toothing arranged in the hinge cup.

An assistance apparatus for opening and closing a scissor door for a vehicle includes: a door hinge having one side installed at a vehicle body to be rotated vertically through a hinge shaft, and having a door mounted at an opposite side thereof; a gas lifter having a first side installed at the vehicle body, and having a second side installed at the door hinge to assist a rotational force of the door hinge or keep a posture thereof through compression and elongation; and an opening and closing assistance unit for providing the rotational force to the door hinge in interlocking with the pressing operation of a vehicle passenger.