When the electric power is applied to the solenoid coil 130 from the electric power supply unit 150 to generate the magnetic force on the magnetic bar 132, {HEAD ~ the needle} 136 contacts {TAIL ~ the magnetic bar} 132 as a result of the generated magnetic force 
contacts
When the electric power is applied to the solenoid coil 130 from the electric power supply unit 150 to generate the magnetic force on the magnetic bar 132 , { HEAD ~ the needle } 136 contacts { TAIL ~ the magnetic bar } 132 as a result of the generated magnetic force
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 OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH