| 摘要 |
PURPOSE:To miniaturize and lighten a pre-tension of a seat belt device by utilizing an operational mechanism as an inertia body. CONSTITUTION:A shaft direction drive means 3 slidably supported integrally to a fixed member 1 and a trigger mechanism 4 are made an inertia body, an operation end 31a of the shaft direction drive means 3 is disengaging-freely locked to the fixed member 1 via the trigger mechanism 4, and a fraction member 2 is made capable of engaging with the operation end 31a of the shaft direction drive means 3. The application of excessive acceleration to a vehicle and the displacement of the shaft direction drive means 3 due to inertia force, causes with that the release of the locking of the trigger mechanism 4 to the fixing member 1, drawing the fraction member 2 by the operation end 31a due to a spring load. |
