| 摘要 |
<p>The crank has a rod (1) whose one end is rotatingly connected to an outlet of a box of a roller shutter and another end is extended through a stud (3). An end of a crank arm (2) is pivotably mounted with respect to the stud. A handle is arranged with another stud (5) pivotally mounted with respect to another end of the crank arm. One of the studs is formed by cutting a sheet e.g. steel sheet, and is removable with respect to the rod or handle. The studs include main parallel faces (F) separated by constant thickness. The studs are partially covered with covers (8, 11) made of plastic material.</p> |
