Techniques and solutions for performing automatic client-side configuration of network services is described. The locking apparatus includes a cam provided on one of the moving body and the housing, and having an engagement groove and a releasing groove, and a swivel body provided on the other of the moving body and the housing. The detection unit detects the amount of shake of the first image. The method includes donning the system by expanding an interior open area of the system via the stretchable bottom band then sliding over an end of a foot into a first position where the decorative member is located on a foot top surface. The deformable element may be a wound wire, a profiled wire, an interlocked wire with interlocked turns, a non-interlocked wire, a spring with turns urged outwardly or reinforcement with turns urged outwardly and bearing blocks in the annular space on the inner pipe for at least one end of the reinforcement.