Edge Strike Latch Plate Safety and Architrave Protection

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Solution Overview

Problem

Conventional interior door latch plates with protruding lips pose a physical hazard to individuals and pets, and they are complex and costly to manufacture and install, while also failing to adequately protect architrave from damage.

Innovation Solution

The edge strike latch plate design features a flat or beveled leading edge that eliminates the protruding lip, integrating an adjustable tab for secure door closure and using stamped metal or plastic construction with a protective veneer coating, ensuring the latch plate is simple, inexpensive, and easy to install, effectively protecting door jamb and architrave from damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If conventional lip strike latch plates with protruding lips are used, then the latch plate can effectively retract the angled bolt, but it poses a physical hazard to individuals and pets

Engineering Contradiction:

Improvephysical hazard to individuals and petsVSAvoidlatch bolt retraction effectiveness

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The invention removes the protruding lip portion from the latch plate design, extracting only the harmful element while retaining the essential flat base plate that provides latch bolt reception and door jamb protection functions

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention converts the potentially harmful protruding lip into a beneficial recessed design where the latch bolt strikes the flat surface of the base plate, eliminating injury risks while maintaining effective bolt retraction through the same striking mechanism

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Ease of manufacture

If conventional full lip or T-strike lip latch plates are used, then the curvature lip portion protects the door jamb and architrave, but the latch plate becomes complex and costly to manufacture and install

Engineering Contradiction:

Improvemanufacturing complexity and costVSAvoidprotection of door jamb and architrave

Core Design Contradiction:

Ease of manufactureVSStrength

Solution Approach 1:

The invention extracts and eliminates the complex curvature lip portion from the latch plate, retaining only the essential flat base plate that provides protection to the door jamb and architrave areas, thereby simplifying manufacturing while maintaining protective function

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention applies protection only where necessary - the flat base plate covers and protects the door jamb and architrave areas that require protection from the angled bolt, eliminating unnecessary complex structures in areas where protection is not needed

Inventive Principle:

Principle #3Local quality

3Strength

If conventional lip strike latch plates are used, then the latch plate can retract the angled bolt, but it fails to adequately protect the architrave from damage

Engineering Contradiction:

Improveprotection of architraveVSAvoidlatch bolt retraction

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The invention extends the protection coverage to the architrave area by positioning the flat base plate to cover both the door jamb and architrave surfaces, using a two-dimensional coverage approach rather than relying on the three-dimensional protruding lip structure

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS20210404213A1Invisible latch strike

Publication Date: 2021.12.30 CHENOWETH THOMAS

AI summary

An edge strike latch plate having a retraction means for retracting a door spring-loaded latch bolt wherein the retraction means proximates the front edge of a door jamb or proximates the front edge of door jamb architrave to protect the front edge of the door jamb and the front edge of architrave from a door spring-loaded latch bolt, protect from injury an individual, protect from damage the clothing of an individual, protect from damage the personal property of an individual, and protect pets from injury.