Multi-function latch bolt with internal egress mechanism
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Solution Overview
Problem
Existing gate latch systems do not allow individuals inside a fenced area to open the gate when it is locked on the outside, leading to situations where homeowners are locked in and must find alternative ways to exit.
Innovation Solution
A gate latch system comprising a latch-hook bracket, handle bar, and base bracket that can be pivotably or slidably disengaged from the latch bolt, allowing the gate to be opened from the inside even when locked on the outside, with optional features like a cam lock for secure access control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a padlock is installed on the outside of the gate latch to prevent unauthorized entry, then security against trespassing is improved, but the ability of the homeowner on the inside to open the gate is lost
Solution Approach 1:
The latch system is divided into separate functional components: a latch bolt for engagement, a latch-hook bracket for actuation, and a padlock hasp for external locking. This segmentation allows the padlock to secure the external interface while the internal latch mechanism remains independently operable from the inside.
Solution Approach 2:
The invention extracts the external locking function into a separate padlock mechanism that only secures the hasp, while the internal latch bolt and latch-hook bracket remain accessible and operable from inside the enclosed area. This separation ensures that external locking does not compromise internal egress capability.
2Reliability
If the latch is locked on the outside with an incorporated lock or keyed padlock, then access control is improved, but the complexity of the system increases
Solution Approach 1:
The latch system incorporates multiple locking options including padlocks with hasps, integrated cam locks, and combination locks, all within a single unified structure. The base bracket and latch assembly serve both as the primary latching mechanism and as the mounting structure for various types of locks, eliminating the need for separate locking systems.
Solution Approach 2:
The invention merges the latch mechanism and locking mechanism into a single integrated assembly. The latch bolt, latch-hook bracket, base bracket, and lock components work together as one unified system, reducing overall complexity compared to having separate latch and lock systems.
3Ease of operation
If a simple latch mechanism is used, then ease of operation is improved, but the security against unauthorized entry is reduced
Solution Approach 1:
The latch bolt is designed to be dynamically movable along its axis, allowing it to engage with and disengage from the latch-hook bracket. This dynamic movement enables simple operation from inside while the engaged position provides secure locking when combined with external padlocks or integrated locks.
Solution Approach 2:
The latch-hook bracket acts as an intermediary component that receives the latch bolt and provides the interface for both internal operation and external locking. This mediator allows the simple latch mechanism to be enhanced with security features without complicating the basic operation.
Data Source
AI summary
A multi-function latch and latch bolt includes a pair of mechanical fastener to be installed on a gate for the purpose of holding the gate in closed position, and that a person standing on the inside of the fence can disengage the latch hook bracket from the latch bolt, or disengage the latch bolt from the latch hook bracket in any of which method to unlatch and open the gate from inside the fence even when the outside of the latch is locked. On the other hand, when the latch is not locked on the inside but locked on the outside with an incorporated lock, keyed or combination padlock; then a person standing on the outside of the gate may open the gate if he/she has an appropriate key or knows the combination codes in order to unlock, unlatch and open the gate from outside the fence.