| 主权项 |
1. A zipper having a slider moveable in an opening direction to open the zipper and in a closing direction to close the zipper, the slider comprising a control member and a casing, the control member being moveable between a locking position in which movement of the slider in the opening direction is prevented and an unlocking position in which movement of the slider in the opening direction is allowed, wherein when the control member is in the locking position the casing at least partially encloses the control member so as to substantially prevent the application of a contact force tending to move the control member from the locking position to the unlocking position, the control member being at least partly formed of a material to which a magnetic force is applied by a permanent magnet in proximity whereby to allow the control member to be moved from the locking position to the unlocking position by application of a magnetic force to the control member, wherein the slider is provided with means for resiliently urging the control member into the locking position, wherein the slider has a detent mechanism operable to hold the control member in the unlocking position against the resilient urging means once the control member has been moved to the unlocking position, and wherein the casing is formed of a non-magnetic material. |
