| 摘要 |
As herein described a plastic or metal hollow frame device which when mounted within the bolt cavity on a door frame and therefrom extending outwards with curved "U' shaped arms through the strike plate aperture mounted concentric with and above the said frame bolt cavity, and thence into the space between the door frame and the edge of the closed door, i.e. the door gap, upon which door is mounted an associated spring bolt door lock, in such a manner that when the spring bolt is located within the strike plate aperture and the frame bolt cavity, i.e. the door is closed, the said spring bolt is protected on three sides by the curved "U' shaped arms such that all methods of attacking the spring bolt by any external means are effectively blocked, and additionally, wherein the said "U' shaped curved arms bear upon the strike plate aperture such that any impact force on the outside surface of the door is redirected into the door cripple by the bending of the "U' shaped curved arms on to the hollow frame base plate, thus dissipating the impact force at right angles to the direction of the initial impact force rather than the retaining screws of the strike plate, thus maintaining the integrity of the spring bolt and also the frame strike plate in a manner which designates its explicit naming as a spring bolt and strike plate guard.
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