| 摘要 |
The present invention is a two piece plastic door latch for use with hinged doors. The invention is intended as a temporary replacement of a traditional doorknob system, and is specifically designed for use during construction of a building. A typical door includes a cutout for mounting the door knob assembly and a bore extending from the front edge of the door to the cutout, through which passes the door latch bolt. The invention consists of a tubular casing with a latch plate formed at one end and a latch bolt slidably mounted within a glide path formed within the casing. The casing is inserted into the bore and secured to the edge of a door by the latch plate. The latch bolt extends outwardly from the casing to engage a strike plate secured to the doorjamb. A rubber band secured to the casing engages the latch bolt to urge the latch bolt to its extended position, with the head of the latch bolt extending outward of the door edge. At the inward facing end of the latch bolt forms an "O" ring that is generally aligned with the cutout. The cutout provides access to the "O" ring. To open the door latch, an individual reaches through the cutout and grasps the "O" ring and slidably retracts the latch bolt back into the casing, allowing the door be opened.
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