ぜんまい仕じ掛かけ

also: ばねじかけ

ぜ

ん

ま

い

じ

か

け

Meanings

noun, noun which may take the genitive case particle 'no'

clockwork mechanism; spring-driven device

Refers to a mechanism powered by a wound spring, such as in old toys, clocks, or music boxes. Often used attributively with の.

ぜんまい
ぜんまい is the mainspring itself; ぜんまい仕掛け is the whole spring-driven mechanism.
ばね
ばね is a general spring; ばね仕掛け is a less common synonym for spring-driven mechanism.

ぜんまい仕じ掛かけ
Common spelling using ぜんまい (mainspring) and 仕掛け (mechanism).
ばねじかけUsage75%
ばね仕じ掛かけUsage25%
Uses ばね (spring) instead of ぜんまい; less common but still encountered.
発条仕掛け
- ぜんまいじかけ
  Uses the rare kanji 発条 for ぜんまい; mainly in older or technical texts.
- ばねじかけ
  Same rare kanji form, read as ばねじかけ; even less common.

Compound of ぜんまい (mainspring) or ばね (spring) + 仕掛け (mechanism, device). The kanji 発条 is an uncommon spelling for both ぜんまい and ばね.