noun
coiled spring; helical spring
A spring made by coiling wire into a helix. The term is rare and usually written in kana; the more common word is コイルばね.
See also: コイルばね
この機械にはつるまきばねが使われている。
A coiled spring is used in this machine.
The toy moves using the elasticity of a helical spring.
コイルばね is the common modern term for a coiled spring. つるまきばね is a rare native Japanese equivalent.
Compound of 蔓巻き (つるまき, 'vine-winding' or 'spiral') + ばね (spring). The kanji 発条 is a rare ateji for ばね.