| 摘要 |
<p>The main body section (12) of a shock absorbing member (10) is a three-dimensional structure formed by hard polyurethane. A ratio (W2/W1), which is the ratio of the width (W2) of a groove (30) formed on a collision surface (12A) of the main body section (12) to the width (W1) of the collision surface (12A) of the main body section (12), is within a range of 1/6 - 1/2. In this respect, when a knee section (M1) of an occupant (M) collides with the collision surface (12A) of the main body section (12) of the shock absorbing member (10), the resulting load is most liable to act on the collision surface (12A) in the initial collision stage. Since the groove (30) is formed on this collision surface (12A), load concentration on the collision surface (12A) is restricted in the initial collision stage, and the load is dispersed, with the consequence that significant fracture of the main body section (12) of the shock absorbing member (10) and wide scatter of splints thereof are restricted in the initial collision stage, resulting in making it possible to secure shock absorbing energy amounts in the intermediate collision stage and the latter collision stage.</p> |
