Arcuate Door Latch Clasp Assembly for Stripped Screw Repair
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Solution Overview
Problem
Existing door latch and dead latch systems often become loose or inoperable due to worn-out or damaged material inside the door, causing the screws to strip out and fail to secure properly, leading to issues with door closure and latch engagement.
Innovation Solution
A door latch clasp assembly with arcuate cross-sectional apertures and an intermediate section that approximates the door's perimeter wall shape, allowing for secure mounting of the latch assembly using machine screws, even when the original screws can no longer catch onto the door material, providing a new medium for fasteners to secure the latch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If original screws are used to secure the door latch plate, then the installation is simple and direct, but the screws strip out over time or after repeated hardware changes, causing the latch to become loose or inoperable
Solution Approach 1:
The clasp assembly serves as an intermediary component between the door latch plate and the door bore hole. It provides a new secure mounting surface within the bore hole that the screws can engage with, eliminating the problem of stripped door material while maintaining simple installation procedures.
Solution Approach 2:
The clasp assembly is pre-installed in the door bore hole before the latch plate is mounted. This preliminary action creates a prepared, reliable mounting surface that prevents future screw stripping issues before they occur.
2Reliability
If a new clasp assembly is installed to provide secure mounting, then screw stripping is prevented, but the device complexity increases with additional components
Solution Approach 1:
The mounting system is segmented into two functional parts: the clasp assembly (which provides secure anchoring in the bore hole) and the latch plate (which holds the latch mechanism). This segmentation allows each component to be optimized for its specific function while working together as a complete system.
Solution Approach 2:
The clasp assembly is nested within the door bore hole, and the latch plate is subsequently mounted onto the clasp assembly. This nesting arrangement allows the clasp to be hidden within the bore hole while providing external mounting points for the latch plate, minimizing visual complexity.
3Reliability
If the clasp assembly uses an arcuate cross-sectional shape to fit the door perimeter wall, then secure engagement is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The clasp assembly uses an arcuate (curved) cross-sectional shape that conforms to the curved perimeter wall of the door bore hole. This curvature allows the clasp to naturally follow the contour of the bore hole, providing secure engagement through shape complementarity rather than requiring precise dimensional tolerances.
Data Source
AI summary
A door latch clasp assembly configured for use with a door having a door latch assembly and a door latch plate is provided. The door latch clasp assembly includes a first aperture section having a first aperture. The first aperture section has an arcuate cross-sectional shape. A second aperture section has a second aperture and the second aperture section has an arcuate cross-sectional shape. An intermediate section extends from the first aperture section to the second aperture section. The intermediate section has an arcuate cross-sectional shape and a latch assembly aperture. The arcuate cross-sectional shapes of the first and the second aperture sections and the arcuate cross-sectional shape of the intermediate section are configured to approximate an arcuate cross-sectional shape of a perimeter wall of a face bore of the door.