In an aspect, a pivot joint for a collapsing foot-deck-based vehicle is described, comprising a foot deck, at least two wheels coupled to the foot deck, and a handlebar assembly coupled to the foot deck via a locking pivot joint, also referred to as a locking swivel joint, the handlebar assembly comprising at least one handle, the locking pivot joint having a pivot axis that is generally unparallel with a horizontal plane defined by the lowermost surfaces of the at least two wheels, the handlebar assembly being selectively pivotable via the locking pivot joint between a riding configuration in which the handle is generally distal from the foot deck and a collapsed configuration in which the handle is generally proximal to the foot deck.

A foldable playard includes a plurality of vertical tubes, a plurality of X-typed frames and a latching mechanism. Each vertical tube includes a bar member, a corner and a slider. The corner is affixed to top of the bar member. The slider is movably disposed on the bar member. Each of the X-typed frames is rotatably connected between two adjacent vertical tubes via the corner and the slider. The latching mechanism includes a latch body and a locking portion. The latch body includes a first end and a second end opposite to each other, and the first end being disposed on the corner of one vertical tube. The locking portion is disposed on the second end. The locking portion is adapted to engage with and disengage from one X-typed frame rotatably connected to the slider on the said vertical tube in response to motion of the latch body.

A foldable playard includes a plurality of vertical tubes, a plurality of X-typed frames and a latching mechanism. Each vertical tube includes a bar member, a corner and a slider. The corner is affixed to top of the bar member. The slider is movably disposed on the bar member. Each of the X-typed frames is rotatably connected between two adjacent vertical tubes via the corner and the slider. The latching mechanism includes a latch body and a locking portion. The latch body includes a first end and a second end opposite to each other, and the first end being disposed on the corner of one vertical tube. The locking portion is disposed on the second end. The locking portion is adapted to engage with and disengage from one X-typed frame rotatably connected to the slider on the said vertical tube in response to motion of the latch body.

Provided are a rotary shaft assembly and a lamp. A first connecting base of the rotary shaft assembly is formed with a positioning hole. A second connecting base of the rotary shaft assembly is rotatably connected to the first connecting base. One end of a positioning pin of the rotary shaft assembly is movably connected to the second connecting base. The other end of the positioning pin is configured to enter or exit the positioning hole from a first side of the positioning hole. An unlocking pin of the rotary shaft assembly is configured to enter or exit the positioning hole from a second side of the positioning hole. The unlocking pin is configured to drive the positioning pin to exit the positioning hole when the unlocking pin enters the positioning hole.

Provided are a rotary shaft assembly and a lamp. A first connecting base of the rotary shaft assembly is formed with a positioning hole. A second connecting base of the rotary shaft assembly is rotatably connected to the first connecting base. One end of a positioning pin of the rotary shaft assembly is movably connected to the second connecting base. The other end of the positioning pin is configured to enter or exit the positioning hole from a first side of the positioning hole. An unlocking pin of the rotary shaft assembly is configured to enter or exit the positioning hole from a second side of the positioning hole. The unlocking pin is configured to drive the positioning pin to exit the positioning hole when the unlocking pin enters the positioning hole.

A compensating element having a first and a second assembly, wherein a locking mechanism is provided which can be switched over between a first and a second operating state. In the first operating state, the first assembly is connected fixedly to the second assembly and, in the second operating state, the first and second assemblies are connected to each other via a spring mechanism in such a manner that they are movable relative to each other. The locking mechanism includes an electric motor that can be used to switch over between the first and the second operating state. A locking ring is or is not braced against at least three balls depending on its rotational position with respect to a center axis. The locking ring is connected in terms of rotary drive to the electric motor via a torsion spring which is elastic with respect to the center axis.

A compensating element having a first and a second assembly, wherein a locking mechanism is provided which can be switched over between a first and a second operating state. In the first operating state, the first assembly is connected fixedly to the second assembly and, in the second operating state, the first and second assemblies are connected to each other via a spring mechanism in such a manner that they are movable relative to each other. The locking mechanism includes an electric motor that can be used to switch over between the first and the second operating state. A locking ring is or is not braced against at least three balls depending on its rotational position with respect to a center axis. The locking ring is connected in terms of rotary drive to the electric motor via a torsion spring which is elastic with respect to the center axis.

A ball head includes: a main body provided with ball body and fastener accommodating portions adjacent to each other in an up-and-down direction; a ball body provided with a threaded rod extending outward therefrom; and a fastener. The ball body and fastener accommodating portions are respectively formed with openings respectively extending upward and downward and having diameters respectively smaller than the diameters thereof, and communicated with an external space through a notch of the main body, wherein a fixing assembly is disposed at the notch. The notch can be expanded, such that the fastener and the ball body are respectively placed into the fastener and ball body accommodating portions. The notch can be further contracted by locking the fixing assembly tight and thus the ball body is non-rotatable, while the notch can also be expanded by loosening the fixing assembly and thus the ball body is rotatable.

In a device with adjusted pause-type hinge, a holding portion and a fixing axis are combined to form a pause-type hinge, the holding portion has a shaft joint portion and an extending portion, the fixing axis passes through the shaft joint portion and the extending portion in shaft manner for rotating and combined to the holding portion, the holding portion has a protruding portion, the fixing axis has at least one fixing hole, and the protruding portion is elastically stretched and engaged with the fixing hole to form a pausing position of a corresponding angle.

A spherical joint of the present disclosure includes a ball member and a socket having an inner circumferential surface configured to spherically contact the ball member. The socket includes a cage part forming the inner circumferential surface and having an opening, and a bar-shaped connecting part provided to the cage part. A fastening member is disposed at the cage part so as to reduce a space of the opening in the extending direction of the connecting part and such that a gap is formed between the fastening member and the ball member. The opening is formed in a part of the inner circumferential surface other than a part where the largest load is applied.