| 摘要 |
<p>An auxiliary lock comprising a latch assembly 20 having an elongated casing to be received by a first horizontal bore extending into the end of the door, a cylinder mechanism to be received by a second horizontal thru bore extending, from one face of the door to the other face of the door and intersecting the first bore. The cylinder mechanism includes a cylinder having a cylindrical guard 30 having an annular door engaging surface 40, an annular lip 42 projecting inwardly from the annular door engaging surface to be received by the second thru bore, a cylindrical segment 52 projecting inwardly from the annular lip, a strut 54 projecting radially upwardly from one circumferential end of the segment and defining therewith a shaped structure. The strut has a length selected so that the shaped structure lies proximate the bottom of said casing to thereby prevent the rotation of said guard. <IMAGE></p> |
