A pure switching function is provided in another embodiment, wherein, by moving the rotary button back and forth, a switch over is caused between an off position and an on position of {HEAD ~ a switching element} mechanically connected with {TAIL ~ the rotary button} 
mechanically connected with
A pure switching function is provided in another embodiment , wherein , by moving the rotary button back and forth , a switch over is caused between an off position and an on position of { HEAD ~ a switching element } mechanically connected with { TAIL ~ the rotary button }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL