To solve the problem that a spiral spring is considered unsuitable for a reclining adjustment mechanism because there is room for improvement in an irregular pitch winding structure and there is little disclosure of concrete means for solving a returning speed of a spring and/or a reclining seat.SOLUTION: A vehicular spiral spring provided with bent terminal end and start end side locking pieces for hooking in winding terminal end and start end parts of a spring plate surface for a spring and formed in a spiral irregular pitch winding structure is composed of spring plates and includes a terminal end spring plate, an intermediate spring plate extending from the terminal end spring plate, and a start end spring plate extending from the intermediate spring plate. A terminal end side locking piece is provided at the terminal end of the terminal end spring plate, a start end side locking piece is provided at the start end of the start end spring plate, and a first interval formed by the intermediate spring plate and the terminal end spring plate is formed larger than a second interval formed by the start end spring plate and the intermediate spring plate.SELECTED DRAWING: Figure 8
【課題】不等ピッチ巻き構造に改良の余地がある。そして、スプリング及び/又はリクライニングシートの戻りスピードの解決に関する具体的手段の開示が少なく、リクライニング調整機構には不向きと考えられる。【解決手段】スプリング用バネ板表面の捲装終端・始端部に、曲折した引掛け用の終端・始端側係止片を備え、渦巻状の不等ピッチ巻き構造でなる車輌用のスパイラルスプリングは、バネ板で構成し、終端バネ板と、終端バネ板より延設した中間バネ板と、中間バネ板より延設した始端バネ板とでなり、終端バネ板の終端に、終端側係止片を設け、始端バネ板の始端に、始端側係止片を設け、始端バネ板と中間バネ板で形成される第2間隔に対し、中間バネ板と終端バネ板で形成される第1間隔が、大きく形成してなる構造である。【選択図】図8
SPIRAL SPRING
スパイラルスプリング
2020-05-21
Patent
Electronic Resource
Japanese