Push-Down Emergency Door Lock With Secondary Seat Delayed Unlocking

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Solution Overview

Problem

There are no push-down type emergency door-locking devices with delayed unlocking functions, and installing such functions in existing push-down devices either increases preparation and installation costs or requires additional protective housing, leading to inefficiencies.

Innovation Solution

A delayed unlocking push-down type emergency door-locking device is designed with a secondary lock seat that houses the necessary components, including a position-sensing module and timing electromagnetic traction assembly, allowing for delayed unlocking without altering the main lock seat mechanisms.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If delayed unlocking function components are installed in the main lock seat, then delayed unlocking function is achieved, but device complexity and installation costs increase

Engineering Contradiction:

Improvedelayed unlocking functionVSAvoidlock seat structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The locking system is divided into two independent parts: a main lock seat for primary locking and a secondary lock seat for delayed unlocking. By segmenting the functions, each lock seat can be optimized independently, avoiding the complexity of integrating all functions into a single lock seat.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The delayed unlocking function components are extracted from the main lock seat and placed in a separate secondary lock seat. This extraction removes the complexity from the main lock seat while preserving the delayed unlocking capability in the secondary lock seat.

Inventive Principle:

Principle #2Taking out (Extraction)

2Adaptability or versatility

If delayed unlocking function components are installed outside the main lock seat, then delayed unlocking function is achieved, but preparation and installation costs increase

Engineering Contradiction:

Improvedelayed unlocking functionVSAvoidinstallation cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The secondary lock seat with delayed unlocking components is merged with the existing main lock seat assembly to form an integrated locking system. This combination allows the delayed unlocking function to be added without requiring separate external installations, reducing overall installation costs.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The secondary lock seat is designed as a universal component that can be integrated with various main lock seat configurations. By creating a multi-functional assembly that works across different installation scenarios, the system reduces the need for custom preparations and specialized installation procedures.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If strong housing is installed to protect delayed unlocking components, then component protection is improved, but preparation and installation costs increase

Engineering Contradiction:

Improvecomponent protectionVSAvoidinstallation cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The delayed unlocking components are nested within the secondary lock seat structure, which itself is integrated into the main lock seat assembly. This nested arrangement provides inherent protection without requiring additional external housing, as the existing lock seat structures serve as protective enclosures.

Inventive Principle:

Principle #7Nested doll (Nesting)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution enables push-down type emergency door-locking devices to have a delayed unlocking function without increasing installation costs, as all components are housed within the secondary lock seat, thus compatible with various existing devices and reducing preparation and installation expenses.

Implementation Method 1

a timing electromagnetic traction assembly (6, 61, 62) is disposed inside the secondary lock seat (2)... The electromagnetic traction mechanism (62) is connected to the stopper (4)... pulls the stopper (4) from the stop position (SP) to the avoidance position (AP)

Methodology Applied

Scientific EffectElectromagnetic traction: Electromagnet

Data Source

PatentUS12480336B2Delayed unlocking push-down type emergency door-locking device

Publication Date: 2025.11.25 SHANGHAI MINGWEI HARDWARE

AI summary

A delayed unlocking push-down type emergency door-locking device includes a main lock seat, a secondary lock seat, a push-down type handle assembly, a position-sensing module and a timing electromagnetic traction assembly. The push-down type handle assembly is configured for moving along a driving path from a locking position toward an unlocking position, thereby at least one of locking element of the main lock seat is separated from a locking groove to unlock. A stopper is disposed at the secondary lock seat, configured for moving between a stop position and an avoidance position. The timing electromagnetic traction assembly is configured for counting time upon when the position-sensing module detects the push-down type handle assembly is separated from the locking position, and for pulling the stopper from the stop position to the avoidance position after delaying a predetermined delay time to the unlocking position for delaying.