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 {HEAD ~ position} of {TAIL ~ a switching element} mechanically connected with the rotary button 
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 { HEAD ~ position } of { TAIL ~ a switching element } mechanically connected with 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 HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH