Self-Calibrating Elevator Door Lock Contacts for Wear-Related Misalignment

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Solution Overview

Problem

Existing elevator door lock contact making devices suffer from position deviations due to wear, leading to inaccurate alignment and requiring labor-intensive manual adjustments, which are not timely and efficient.

Innovation Solution

A self-calibration elevator door lock contact making device with a stationary and movable base plate, adjusting components, and a controller for real-time monitoring and automatic calibration, allowing the contacts to move laterally or longitudinally to ensure proper alignment and smooth locking.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If manual checking and adjustment of safety contacts is performed, then alignment accuracy can be maintained, but labor intensity increases and timely adjustment cannot be ensured

Engineering Contradiction:
Improvealignment accuracyVSAvoidmaintenance time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

The system performs self-diagnosis and self-adjustment of safety contact alignment. The detection device monitors contact alignment status, and when deviation is detected, the system automatically adjusts the contacts back to proper alignment without requiring manual intervention, enabling the system to service itself

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The system continuously monitors the alignment status of safety contacts through the detection device and feeds this information back to the control device. Based on the feedback signal indicating whether contacts are properly aligned, the system automatically activates adjustment mechanisms to correct misalignment, creating a closed-loop control system

Inventive Principle:
Principle #23Feedback

2Reliability

If manual adjustment of safety contacts is performed, then alignment can be corrected, but the process is labor-intensive and not timely

Engineering Contradiction:
Improvedoor lock operation reliabilityVSAvoidmaintenance operation ease
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The system automatically detects and corrects safety contact alignment issues without requiring maintenance personnel intervention. The detection and adjustment mechanisms work autonomously to maintain reliable door lock operation, eliminating the need for manual maintenance while ensuring continuous reliability

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The system replaces manual mechanical adjustment operations with automated detection and adjustment mechanisms. The control device electronically monitors contact alignment and automatically actuates adjustment mechanisms, substituting human mechanical operations with an automated electromechanical system

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Manufacturing precision

If safety contacts are monitored and adjusted manually, then alignment can be maintained, but productivity decreases due to frequent manual interventions

Engineering Contradiction:
Improvecontact alignment precisionVSAvoidelevator operation productivity
Core Design Contradiction:
Manufacturing precisionVSProductivity

Solution Approach 1:

The detection device continuously monitors safety contact alignment status without interruption, and the automatic adjustment mechanism immediately corrects any misalignment detected. This continuous monitoring and instant correction ensures contact alignment precision is maintained at all times without periodic manual interventions that would interrupt elevator operation and reduce productivity

Inventive Principle:
Principle #20Continuity of useful action

Data Source

PatentUS20250289686A1Self-calibration elevator door lock contact making device
Publication Date: 2025.09.18 CHINA JILIANG UNIV
  • US20250289686A1 patent drawing
  • US20250289686A1 patent drawing
  • US20250289686A1 patent drawing

AI summary

The present application discloses a self-calibration elevator door lock contact making device, which comprises a stationary base plate, a movable base plate, contacts, adjusting components and a controller, wherein the stationary base plate and the movable base plate are oppositely arranged and are respectively provided with contacts, and the two contacts can move relatively laterally or longitudinally through the adjusting components respectively; and the controller is electrically connected with two groups of adjusting components and provided with a contact detection loop capable of monitoring the contact state of the two contacts. The automatic real-time monitoring and automatic calibration of the door lock can be realized, and the door lock can be locked smoothly when the landing door and the car door are closed, thereby reducing the delay caused by inaccurate door operation and the cost of manual maintenance and adjustment, and improving the safety and reliability of the elevator.