To provide a lifter device configured so that a height of a seat can be adjusted according to operation of an operation handle and change in height of the seat is locked by engagement of teeth that relatively rotate in response to the change in height of the seat when the operation handle is not operated, which increases amounts of relative rotation of the teeth relatively rotating with respect to the change in height of the seat to suppress the change in height of the seat when the teeth start to relatively rotate toward engagement for the lock when the operation handle is not operated.SOLUTION: A lock mechanism B comprises a first tooth 30a provided in a rotary shaft 22 and second teeth 32a and 33a, provided in a support member 23, which selectively engage with the first tooth 30a to lock relative rotation of the rotary shaft 22 and a support member 23, which further comprises a speed-up gear 25, provided closer to the rotary shaft 22 on a rotation transmission passage than engaged parts of the first tooth 30a and the second teeth 32a and 33a, which speeds up rotation of the rotary shaft 22 and transmits the rotation to the first tooth 30a.SELECTED DRAWING: Figure 4
【課題】操作ハンドルの操作に応じてシートの高さを調整可能とし、操作ハンドルの非操作時、シートの高さの変化に応じて相対回転する歯同士の噛合によりシートの高さ変化をロックするリフタ装置において、相対回転する歯同士のシート高さ変化に対する相対回転量を多くすることにより、操作ハンドルの非操作時に上記ロックのため歯同士が噛合に向けて相対回転する際のシートの高さ変化を抑制する。【解決手段】ロック機構Bは、回転軸22に設けられた第1歯30aと、支持部材23に設けられ、第1歯30aに選択的に噛合して回転軸22及び支持部材23の相対回転をロックする第2歯32a、33aとを備え、第1歯30a及び第2歯32a、33aの噛合部より回転伝達経路の回転軸22側に設けられ、回転軸22の回転を増速して、第1歯30aに伝達する増速機構25を備える。【選択図】図4
LIFTER DEVICE
リフタ装置
2021-01-07
Patent
Electronic Resource
Japanese