Magnetic OBD Port Cover Locking Against Unauthorized Diagnostic Access

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Solution Overview

Problem

Modern vehicles' OBD ports allow easy access for unauthorized individuals to connect diagnostic tools, enabling them to obtain key codes and potentially start the vehicle, posing a security risk.

Innovation Solution

A device with a removable cover and rocker arms mechanism that temporarily locks the OBD port, using a magnetic key for secure engagement, preventing unauthorized access while being structurally robust and easy to apply.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the OBD port is left accessible for diagnostic purposes, then diagnostic access is fast and accurate, but unauthorized individuals can easily connect diagnostic tools to obtain key codes and potentially start the vehicle

Engineering Contradiction:

ImproveDiagnostic accessVSAvoidUnauthorized access

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

A cover assembly is introduced as an intermediary component between the unauthorized user and the OBD port. The cover includes a body that physically blocks access to the port and a magnetic locking mechanism that secures the cover to the port housing, preventing removal without proper authorization

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The traditional mechanical key-lock system is replaced with a magnetic locking mechanism. The magnetic key contains magnets that interact with magnets in the cover assembly, providing secure locking without requiring complex mechanical keyways or tumblers

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Object-affected harmful factors

If a locking mechanism is added to prevent unauthorized access, then security is improved, but the device complexity increases

Engineering Contradiction:

ImproveUnauthorized access preventionVSAvoidLocking mechanism structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

Complex mechanical locking systems are replaced with a magnetic field-based locking mechanism. The magnetic key and magnets in the cover assembly provide secure locking through magnetic attraction, eliminating the need for complex mechanical keyways, tumblers, or springs

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The locking mechanism utilizes changes in magnetic field parameters (strength, direction) to control the locking state. When the magnetic key is brought near the cover, the magnetic field interaction causes the cover to lock to the port housing, and removing the key releases the magnetic hold

Inventive Principle:

Principle #35Parameter changes

3Strength

If a robust locking mechanism is implemented, then structural integrity is improved, but the device may interfere with port components

Engineering Contradiction:

ImproveLocking mechanism robustnessVSAvoidCompatibility with port components

Core Design Contradiction:

StrengthVSAdaptability or versatility

Solution Approach 1:

The locking mechanism is segmented into separate functional components: a cover body for physical blocking, magnets for locking, and a magnetic key for actuation. This segmentation allows each component to be optimized independently while maintaining overall compatibility with the OBD port

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The magnetic field acts as an intermediary force that transmits the locking action without direct mechanical contact between the key and the cover. This eliminates wear and interference with port components while maintaining strong locking capability

Inventive Principle:

Principle #24Intermediary (Mediator)

4Object-affected harmful factors

If a cover with locking mechanism is added to the OBD port, then security is improved, but the device takes up more space

Engineering Contradiction:

ImproveUnauthorized access preventionVSAvoidCover assembly size

Core Design Contradiction:

Object-affected harmful factorsVSVolume of moving object

Solution Approach 1:

The magnetic key is designed to be inserted into and stored within a recess in the cover body when not in use. The cover assembly itself fits over the existing OBD port connector, nesting the locking mechanism within the existing port structure rather than adding significant external volume

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

Effectively prevents unauthorized connection to vehicle control units, ensuring secure access while maintaining structural integrity and ease of use.

Implementation Method 1

a magnetic key (33) which is insertable into said cover (6) and which is constituted by two or more magnets (36a, 36b, 36c, 36d) arranged in a mutually complementary configuration

Methodology Applied

Scientific EffectMagnetic attraction: Magnetism

Data Source

PatentEP4484229A1Device for locking ports for access to a vehicle control unit

Publication Date: 2025.01.01 OLIANA PIER LUIGI

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AI summary

A device (1) for locking ports for access to a vehicle control unit, constituted by a cover (6), which can be removably positioned so as to cover an external connector (3) of a port (2) for access to a control unit of a vehicle; the cover (6) is provided with first means (9) adapted to actuate the oscillation of one or more rocker arms or linkages (16a, 16b, 16c, 16d) provided with second means (24a, 24b, 24c, 24d) adapted to interact with the port (2) in order to temporarily couple the cover (6) to the connector (3). A protective cap (28) is removably associable with the cover (6).