Collapsible X-cross:

The collapsible X-cross is easy to dis-assemble, and the parts are designed to fit into a common sports-bag. 
The drawing shows the X-cross from the front, and in a side-view.
Adjusting and/or (disassembly is performed by means of the 'finger screws' looking like T's.
It is of the utmost importance, that the X-cross is made to fulfill at least two cravings ( due to the security of the person bound to it):
The tubes and sticks MUST be durable enough, that it will neither be torn apart, or bend ( this also applies to the adjustment screws ! )
There cannot be anything which can irritate ( or PIERCE ) the skin of the one tied to the X-cross !