At least one buffering member, such as coil spring, is preferably located between {HEAD ~ the second support} and {TAIL ~ the second housing} 
At least one buffering member , such as coil spring , is preferably located between { HEAD ~ the second support } and { TAIL ~ the second housing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL