| 摘要 |
A shield assembly, and a lock mechanism incorporating the shield assembly, for a rotatable component 11 projecting from a housing 10 has a base plate 15 and a cover portion 13 adapted in use to encircle the rotatable component 11. At least three spring-loaded plungers 30 are mounted on the base plate 15 to lie within the cover portion 13 and are urged by springs 38 into engagement with the rotatable component 11. A screw-threaded locking arrangement 34,35 is provided for each plunger 30 so as to secure the shield assembly centrally on the component 11. The cover portion 13 may support a lock mechanism 16 which connects back to the housing 10 through arms 17, ring 18, disc 19 and socket 20, whereby locking of the mechanism will prevent rotation of the component 11. <IMAGE> |
