| 摘要 |
An actuator of an active knee bolster is provided with a drive force generation device and a one way lock mechanism that is disposed in a vicinity of an operation end of the drive force generation device. The one way lock mechanism is configured such that, if attempted movement of a piston member in an inward insertion direction occurs, respective engagement portions are moved to a taper portion by urging force of a spring, whereby the engagement portions are abutted against an external periphery surface of the piston member such that the piston member and the engagement portions are fixed. Accordingly, as a result of the one way lock mechanism, a main body of the active knee bolster that has been moved to a restraining position cannot return in a vehicle forward direction, and thus it is possible to generate a substantial lower limb restraining force that restrains a lower limb of an occupant.
|
