出典:Wiktionary
From Middle English swyvel, swivel, from a derivative of 古期英語 swīfan (“to revolve”), + -el, an instrumental suffix, equivalent to swive + -el.
swivel (countable かつ uncountable, 複数形 swivels)
“swivel”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.
出典:Wikipedia
出典:『Wikipedia』 (2010/08/30 12:12 UTC 版)
A swivel is a connection that allows the connected object, such as a gun or chair, to rotate horizontally and/or vertically. A common design for a swivel is a cylindrical rod that can turn freely within a support structure. The rod is usually prevented from slipping out by a nut, washer or thickening of the rod. The device can be attached to the ends of the rod or the center. Another common design is a sphere that is able to rotate within a support structure. The device is attached to the sphere. A third design is a hollow cylindrical rod that has a rod that is slightly smaller than its inside diameter inside of it. They are prevented from coming apart by flanges. The device may be attached to either end.