| 摘要 |
<p>The bottle with self-locking screw-on top (9) is prevented from being opened by It uses an externally threaded (3) bottle neck (1) and a top with an internal spiral groove (5) defined by a thread (6). A seal (7) incorporated in the top makes contact with the upper extremity of the neck and the assembly is unlocked by tilting the top relative to the neck, the components sliding or deforming elastically to accommodate tilting movement. The locking mechanism may use an elastic tongue (15) on either thread (3 or 6) engaging a gap in the other (6 or 3), the arrangement being such that the tongue is deflected during normal winding on and recoils into the gap. Two such tongues (15, 16) associated with two gaps in the counter thread may also be utilised.</p> |
