Striking Plate Assembly With Displaced Sensor For Bolt Detection

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Solution Overview

Problem

Retrofitting sensors in electronic locks to detect the status of barriers is complicated and often weakens the structural integrity, making it difficult to efficiently sense the bolt position.

Innovation Solution

A striking plate assembly with a vertically displaced proximity sensor and antenna, integrated into the striking plate, allows for efficient sensing of the bolt position without compromising structural strength, enabling easy retrofitting and effective communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Difficulty of detecting and measuring

If a sensor is provided in the lock to detect the status of a bolt, then the bolt position sensing capability is improved, but the structural integrity of the lock is weakened and the complexity of installation increases

Engineering Contradiction:

Improvebolt position sensing capabilityVSAvoidstructural integrity of the lock

Core Design Contradiction:

Difficulty of detecting and measuringVSStrength

Solution Approach 1:

The sensor device is extracted from the lock body and relocated to the striking plate. This separation allows the lock to maintain its structural integrity while the striking plate performs the sensing function. The sensor device includes a proximity sensor that detects the bolt position from the striking plate location, eliminating the need to embed sensors within the lock structure itself.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The striking plate serves as an intermediary carrier for the sensor device. Instead of directly installing the sensor in the lock, the sensor is mounted on the striking plate which acts as a mediator between the lock system and the sensing function. This intermediary approach preserves the lock's structural strength while enabling bolt position detection.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Difficulty of detecting and measuring

If a sensor is provided in the lock to detect the status of a barrier, then the barrier status detection is improved, but the difficulty of retrofitting increases

Engineering Contradiction:

Improvebarrier status detectionVSAvoidretrofitting difficulty

Core Design Contradiction:

Difficulty of detecting and measuringVSEase of manufacture

Solution Approach 1:

The sensor functionality is segmented from the lock assembly and placed on the striking plate as a separate, modular component. This segmentation allows the striking plate with the integrated sensor to be manufactured as a standalone unit that can be easily retrofitted onto existing locks, simplifying installation and maintenance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The striking plate assembly is designed to be a self-contained unit with the sensor pre-integrated, requiring minimal modification to the existing lock system during retrofitting. The module can be installed independently, reducing the complexity of retrofitting operations.

Inventive Principle:

Principle #25Self-service

3Measurement precision

If the proximity sensor is positioned close to the bolt path for better detection, then the sensing precision is improved, but the structural strength of the striking plate is reduced

Engineering Contradiction:

Improvesensing precision of bolt positionVSAvoidstructural strength of the striking plate

Core Design Contradiction:

Measurement precisionVSStrength

Solution Approach 1:

The sensor positioning problem is solved by transitioning from a horizontal placement (which would compromise structural strength) to a vertical displacement along the longitudinal direction of the striking plate. This dimensional change allows the sensor to be optimally positioned for bolt detection while maintaining the striking plate's structural integrity in the horizontal load-bearing direction.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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

This solution simplifies the retrofitting process, maintains structural strength, and enhances the sensing capability of the bolt position, allowing for cost-effective and efficient status control of locks and doors.

Implementation Method 1

The sensor device comprises a proximity sensor and an antenna; wherein the sensor device is provided such that its proximity sensor is provided vertically displaced, along a longitudinal direction of the striking plate, from a through-hole through which the locking bolt is intended to pass

Methodology Applied

Scientific EffectInductive sensing: Electromagnetic Induction

Data Source

PatentEP3743577B1Striking plate assembly

Publication Date: 2022.02.23 ASSA ABLOY AB

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AI summary

It is provided a striking plate assembly comprising: a striking plate; and a sensor device for detecting a status of a bolt of a lock for a physical barrier, the sensor device comprising a proximity sensor and an antenna; wherein the sensor device is provided such that its proximity sensor is provided displaced, along a longitudinal direction of the striking plate, from a through-hole through which the bolt is intended to pass. The sensor device is provided such that its antenna is directed towards a gap between the striking plate assembly and the physical barrier, when the striking plate assembly is installed.