Definition of spring frame in English:

spring frame

noun

  • 1The part of a bedstead consisting of a frame in which springs are mounted, used to support the mattress directly.

  • 2A frame of a bicycle or motorcycle in which the rear portion can pivot vertically, forming part of the suspension.

Origin

Early 18th century; earliest use found in Stephen Switzer (bap. 1682, d. 1745), landscape designer and author.