| 摘要 |
A tamper resistant cap comprises an inner, threaded closure 11 and an outer intruder resistant device 1 rotating together with the closure when aligned allowing opening of the container, and rotating relative to the closure when misaligned to prevent opening. The device may comprise rings 1, 3, 4 joined by teeth 9 received in annular gaps. Marks e.g. numbers on each ring (figure 1) indicate correct alignment e.g. in the form of a code or password. The lower ring 4 has a stepped portion engaging a flexible lower part 12 of the closure. When the rings are not aligned a projection presses against part 12 preventing this part from passing the bottom 13 of a screw thread 20 on the container neck. When the rings are aligned the device may be pressed down, a gap 21 allowing space for portion 12 to pass the end of the screw thread so that the closure may be rotated and removed. Corresponding teeth 14, 23 and gaps on the inner surface of the device and outer surface of the closure engage when the rings are aligned providing a clutch to allow the device to be pressed down. |
