| 摘要 |
A visual presenter includes a camera support arm pivotally mounted on a base and having one end on which a camera is mounted, a pivot support including a bracket, a pivot having one end formed with a male thread, a disc spring fitted with the male thread and a nut brought into threading engagement with the male thread so that the spring is fastened to the bracket by the nut with a result that a brake force is effected and a free stop function is given to the pivot support, and a one-way clutch fitted with the pivot to allow the pivot support to be free against rotation causing the pivot support to stand up and to exert a clutching function against rotation causing the pivot support to lie. The camera support arm is pivotally mounted on the pivot support with the one-way clutch being interposed between them. |
