A connector and a frame structure using the same, wherein the connector at least comprises a socket, a bolt and an expansion bolt; the socket comprises a connection end, and a slot, which extends along a length direction of the socket from an end surface of the connection end, is provided on the socket; the bolt comprises a bolt main body that is adapted to the slot, a front end of the bolt main body is provided with at least two expansion arms, and the bolt main body is internally provided with an expansion channel which traverses the bolt main body along a length direction; and the expansion bolt comprises an expansion bolt main body that matches the expansion channel, a front end of the expansion bolt main body is provided with an acting end that interacts with the expansion arm, and the socket and the bolt are tightly connected by means of an expansion force that is generated by the acting end opening the expansion arms. The aforementioned connector achieves quick disassembly and assembly, and also has the advantages of reliable connection, convenient disassembly and assembly and long service life.

A connector and a frame structure using the same, wherein the connector at least comprises a socket, a bolt and an expansion bolt; the socket comprises a connection end, and a slot, which extends along a length direction of the socket from an end surface of the connection end, is provided on the socket; the bolt comprises a bolt main body that is adapted to the slot, a front end of the bolt main body is provided with at least two expansion arms, and the bolt main body is internally provided with an expansion channel which traverses the bolt main body along a length direction; and the expansion bolt comprises an expansion bolt main body that matches the expansion channel, a front end of the expansion bolt main body is provided with an acting end that interacts with the expansion arm, and the socket and the bolt are tightly connected by means of an expansion force that is generated by the acting end opening the expansion arms. The aforementioned connector achieves quick disassembly and assembly, and also has the advantages of reliable connection, convenient disassembly and assembly and long service life.

An adjustable structure (1) comprising a first structural layer (10) defined by a first array of extendable and/or retractable rods or beams (11, 11a, 11b) pivotally connected to each other at their ends and a second structural layer (20) connected to the first structural layer (10) and defined by a second array of extendable and/or retractable rods or beams (21, 21a, 21b) pivotally connected to each other at their ends, wherein at least a portion of the second layer (20) is outside the volume defined by the first structural layer (10) and the extendable and/or retractable rods or beams in the second array are more densely packed than the extendable and/or retractable rods or beams in the first array.

A rotary mechanism comprises a fastener and a tone wheel. The tone wheel comprises a first radial flange, a second radial flange, a first target, and a second target. The first and second targets mounted respectively to the first and second radial flanges to be sensed by a sensor. Each of the first radial flange and the second radial flange comprises a plurality of mounting points, the plurality of mounting points of the first radial flange and the second radial flange provided for adjustment of a diameter of the tone wheel. The fastener is provided to mount the first radial flange and the second radial flange to a shaft at a selected mounting point among the plurality of mounting points of each of the first radial flange and the second radial flange to set the diameter of the tone wheel. An associated method is disclosed.