Motorcycle Brake Disc Lock Alarm Activation

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Solution Overview

Problem

Existing brake disc locks face issues with unreliable activation and deactivation of the alarm device, leading to potential false alarms and inefficient user warning functions due to susceptibility to dirt and improper triggering mechanisms.

Innovation Solution

An 'AND' coupling between the brake disc detection device and the locking mechanism is implemented, ensuring the alarm device is only activated when a brake disc is present and the locking mechanism is in the locking position, with a mechanical coupling that uses a switch actuated by the brake disc detection device to interact with the locking mechanism, providing a robust and reliable activation and deactivation process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the alarm device is activated automatically upon detecting a brake disc, then the user warning function is improved, but false alarms occur due to dirt contamination of the detection device

Engineering Contradiction:

Improvealarm activation reliabilityVSAvoiddirt contamination effect

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

A mechanical intermediary system comprising a brake disc detection device with a cam mechanism and switch is introduced. The cam is pressed by the brake disc against a cam follower, which actuates the switch through a lever arm. This mechanical intermediary converts the presence detection into a reliable electrical signal without direct optical or electronic contact that would be susceptible to dirt contamination.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces unreliable optical or electronic detection systems with a purely mechanical detection mechanism. The mechanical cam and follower system is insensitive to dirt contamination, providing reliable activation of the alarm device only when the brake disc is properly inserted and the locking mechanism is engaged.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Speed

If the alarm device is activated immediately upon lock movement detection, then the user warning function is improved, but false alarms occur during authorized unlocking operations

Engineering Contradiction:

Improvealarm response speedVSAvoidfalse alarm rate

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The system performs preliminary verification by checking two conditions before activating the alarm: (1) the brake disc must be present in the receptacle as detected by the detection device, and (2) the locking mechanism must be in the locking position. This preliminary action prevents false alarms during authorized unlocking operations while maintaining quick response for unauthorized movements.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system uses feedback from both the brake disc detection device and the locking mechanism position sensor to control alarm activation. The alarm is activated only when both sensors indicate the appropriate conditions (brake disc present and lock engaged), creating a feedback-based decision system that distinguishes between authorized and unauthorized movements.

Inventive Principle:

Principle #23Feedback

3Reliability

If the alarm device remains activated continuously, then the theft warning function is improved, but battery consumption increases

Engineering Contradiction:

Improvetheft warning availabilityVSAvoidbattery consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The alarm device operates in a periodic manner rather than continuously. It is activated only during specific periods when the brake disc is detected in the receptacle and the locking mechanism is in the locking position. When these conditions are not met, the alarm remains inactive, significantly reducing battery consumption while maintaining theft warning availability when needed.

Inventive Principle:

Principle #19Periodic action

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 ensures the alarm device is only activated when necessary, allowing for quick deactivation by the user and reducing false alarms, thereby enhancing the user warning function and extending the battery life by minimizing unnecessary electrical consumption.

Implementation Method 1

an alarm device for outputting an alarm signal, the alarm device having a motion sensor

Methodology Applied

Scientific EffectMotion sensing: Accelerometer

Implementation Method 2

a brake disc detection device for detecting whether a brake disc is in the brake disc receptacle

Methodology Applied

Scientific EffectPhysical contact detection:

Data Source

PatentEP1764292B1Brake disk lock

Publication Date: 2009.03.11 ABUS AUGUST BREMICKER SOEHNE KG

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Figure 2
Figure 4a~4b

AI summary

The lock has a body (11) with an accommodation gap (21) to accommodate a brake disc of a motor cycle. A printed circuit board outputs an alarm signal, and a brake disc detection rocker is provided to detect whether a brake disc is found in the gap. The board interacts the rocker and a closing ball in such a way that the board is activated under the condition that the rocker detects the existence of the disc in the gap and the ball is brought into the locking position.