| 摘要 |
Prior rotating casters for luggage require a relatively wide base on which an equally wide wheel support is rotatably mounted. Such constructions have many moving parts, are bulky, and thus do not blend themselves to folding out of the way. Disclosed is a folding caster (100) for a hand luggage that is attached and supported in a housing (1) with the mounting center line (L) of the caster support unit (4). This support unit (4) is of a resilient plastic and slender shape with a portion (12) which pivots and supports the casters (3) and a supporting portion (14) for the shaft (2) which run along the previously mentioned mounting center line to provide the capability of folding into the housing. The caster pivoting support portion (12) is approximately one half the width of the shaft support portion (14). The line (L), which is perpendicular to the line which runs through the transition where the width (16) of the shaft support portion (14) changes to the width (18) of the caster support portion (12), and thus indicates the direction of the bending moment in response to the outer force (F) which is applied by the ground to the ground contacting edge of the caster (3). The bend motion in the plane (R) determines the amount of the steering or turning in the direction of the caster shaft. |
