ENERGIZATION MECHANISM AND WINCH DEVICE EQUIPPED WITH ENERGIZATION MECHANISM

To provide an energization mechanism that prevents the shaft from moving in the axial direction and prevents a part of the spiral spring from entering and being confined in the space made between the shaft and the housing when the energization mechanism is operating.SOLUTION: The energization mechanism includes: a housing 2; a spiral spring; and a shaft 4. The housing 2 includes a covered part 22 that is provided to cover one side in the axial direction at least partly of the spiral spring, and the shaft 4 includes an attachment shaft part 41 and an extended part 42 that extends to the outside in the radial direction against the outer periphery of the attachment shaft part 41. A leading edge 423 outside in the radial direction of the extended part 42 and an opening edge 221 of the covered part 22 are provided opposingly in the radial direction across the clearance so as to be in a non-contact state with each other. When seen in the axial direction, the leading edge 423 and the opening edge 221 overlap.SELECTED DRAWING: Figure 6 【課題】本発明は、シャフトが軸方向に移動することを抑制し、かつ、付勢機構の動作時に、シャフトとハウジングとの間に設けられた隙間に、ゼンマイバネの一部が入り込んで拘束されてしまうことを抑制する、付勢機構の提供を目的とする。【解決手段】本発明の付勢機構は、ハウジング２と、ゼンマイバネと、シャフト４とを備え、ハウジング２は、ゼンマイバネのうち、軸方向で一方側を少なくとも部分的に覆うように設けられた被覆部２２を有し、シャフト４は、取付軸部４１と、取付軸部４１の外周に対して径方向外側に延出した延出部４２とを有し、延出部４２の径方向外側の先端部４２３と、被覆部２２の開口縁部２２１とは、互いに対して非接触状態となるように隙間を介して径方向に対向して設けられ、先端部４２３と開口縁部２２１とは、軸方向に見たときに径方向でオーバーラップしている。【選択図】図６