Emergency Exit Lock Transmission for Universal Press-Bar Compatibility

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Solution Overview

Problem

The existing emergency exit door locks require separate manual and external-operated unlocking mechanisms for different types of press-bar locks, leading to increased production and installation costs, component management burdens, and risks of incorrect component selection.

Innovation Solution

An unlocking transmission mechanism and multi-selective kit for an electric control system that integrates with both inclined front and rear press-bar type emergency exit door locks, using a power transmission shaft to drive the manual-operated press bar assembly, with a slidable base assembly, linear driving assembly, magnet, and linkage member to unlock the door locks, and a multi-selective kit that includes common components for both types.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate external-operated unlocking mechanisms are designed for different types of press-bar locks, then the lock mechanism can be specifically optimized for each type, but the production cost increases and component management burden increases

Engineering Contradiction:

Improvelock mechanism compatibilityVSAvoidcomponent variety

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent designs a universal external-operated unlocking mechanism that can accommodate both inclined front press-bar type and inclined rear press-bar type emergency exit door locks through a standardized interface and adaptable internal structure, eliminating the need for separate mechanisms for different lock types

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The unlocking mechanism is divided into modular components including a standardized external operating interface, an adaptable transmission assembly, and a universal actuation system that can be configured for different press-bar lock types through simple component arrangement rather than complete redesign

Inventive Principle:

Principle #1Segmentation

2Reliability

If separate external-operated unlocking mechanisms are produced for different press-bar lock types, then each mechanism can be optimized for its specific application, but the production cost increases

Engineering Contradiction:

Improvemechanism optimizationVSAvoidproduction cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent creates a single standardized external-operated unlocking mechanism design that serves multiple press-bar lock types, allowing manufacturers to produce one universal component rather than multiple specialized components, thereby reducing production costs while maintaining optimization for each application

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If multiple external-operated unlocking mechanisms are introduced, then different press-bar lock types can be supported, but the risk of picking up the wrong component package increases

Engineering Contradiction:

Improvelock type compatibilityVSAvoidcomponent selection accuracy

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent establishes a universal external-operated unlocking mechanism with standardized interfaces and configurations that work across different press-bar lock types, eliminating the confusion of multiple different component packages and ensuring that a single component package is always compatible with the intended application

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Reliability

If separate electric control systems are designed for different external-operated unlocking mechanisms, then each control system can be optimized for its specific mechanism, but manufacturing and installation costs increase

Engineering Contradiction:

Improvecontrol system optimizationVSAvoidcontrol system variety

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent designs a universal external-operated unlocking mechanism that interfaces with a standardized electric control system, allowing the same control system to operate different types of press-bar locks through the unified mechanism, thereby reducing control system variety and associated manufacturing and installation costs

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250354412A1Unlocking transmission mechanism for electric control system of emergency exit door lock and multi-selective kit thereof

Publication Date: 2025.11.20 SHANGHAI MINGWEI HARDWARE

AI summary

An unlocking transmission mechanism is driven by a power transmission shaft of an electric control system to unlock an emergency exit door lock. The unlocking transmission mechanism includes a fixed base assembly, a slidable base assembly, a linear driving assembly, a transmission member and a linkage member. The transmission member is pivotally connected to the slidable base assembly, and the linkage member is pivotally connected to the transmission member. When the linear driving assembly is driven by the power transmission shaft to drive the slidable base assembly to move along a linear sliding stroke in an unlock-driving direction, the transmission member and the linkage member are sequentially driven to drive a manual-operated press bar assembly to unlock the emergency exit door lock. In addition, a multi-selective kit for the unlocking transmission mechanism is also provided.