A lock for an antitheft device

Abstract

Abstract An antitheft device for marking articles for sale and comprising two members, which automatically interlock one another when one member is inserted in a cavity in the other member, the first member being a rod-shaped body (1) with a completely or partially pointed insertion end, whereby said rod-shaped body (1) is capable of engaging for instance balls loosely arranged in the cavity of the second member, a third member (8) of magnetizable material being inserted below the loosely arranged balls (6), whereby a resilient member (10) with an upwardly directed force is placed below said third member (8). According to the invention the resilient member (10) is an annular plastic member with inward connecting parts (10˝) connected to a centrally arranged disk-shaped plastic member (10′) pressing against the third member (8) in the cavity, the annular plastic member (10) being secured by way of squeezing to an annular groove (11) in the bottom of the housing (16). As a result, the assembling of the members of the lock is facilitated and the bottom and the spring can be formed in one piece. An additional cavity may be provided around the cavity of the lock, said additional cavity containing a colored liquid.

Inventors

• 👤 Frede Nielsen

Bibliographic Details