Vehicle Accident Sensor Bayonet Mounting Mechanism

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Solution Overview

Problem

Existing vehicle accident sensors require complex and costly screw connections for secure installation, which can be time-consuming and require additional safety measures, and lack a straightforward method for ensuring correct orientation and secure attachment.

Innovation Solution

The use of modified bayonet locks and mechanical coding with holding wings allows the accident sensor to be inserted and rotated into a specific stop position, preventing back-rotation and enabling one-handed assembly without tools, along with a sealing mechanism and fold in the wall to ensure correct orientation and secure attachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If screw connections are used to fasten the accident sensor, then secure attachment is achieved, but installation time increases and tool requirements increase

Engineering Contradiction:

Improvesecure attachmentVSAvoidinstallation time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent replaces the traditional screw connection system with a bayonet-style rotational locking mechanism. The fastening means includes a fastening element that rotates into a locked position, eliminating the need for screwdrivers or other threading tools while achieving secure attachment through mechanical interlocking and friction.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The bayonet fastening mechanism is designed to be self-contained and tool-free, allowing the sensor to be installed by hand without requiring external tools. The rotational motion of the fastening element itself creates the locking action, making the system self-servicing during installation.

Inventive Principle:

Principle #25Self-service

2Reliability

If screw connections are used to fasten the accident sensor, then secure attachment is achieved, but additional safety measures and torque monitoring are required

Engineering Contradiction:

Improvesecure attachmentVSAvoidadditional safety measures

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces the screw connection system with a bayonet-style rotational locking mechanism. The fastening means includes a fastening element that rotates into a locked position, eliminating the need for screwdrivers or other threading tools while achieving secure attachment through mechanical interlocking and friction.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

Inventive Principle:

Principle #25Self-service

3Reliability

If traditional fastening methods are used, then secure installation is achieved, but correct orientation cannot be easily ensured

Engineering Contradiction:

Improvesecure installationVSAvoidcorrect orientation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent incorporates asymmetric features in the fastening means, including a directional indicator arrow and an asymmetric fastening element geometry. These features ensure that the sensor can only be installed in the correct orientation, as the asymmetric shapes will not align properly if attempted in any other direction.

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The patent uses visual indicators including a colored arrow or marking on the fastening means that points in the direction of correct installation. This visual cue makes it immediately apparent to the installer which orientation is correct, eliminating guesswork and ensuring proper installation direction.

Inventive Principle:

Principle #32Color changes

4Reliability

If screw connections are used, then secure attachment is achieved, but one-handed assembly becomes difficult due to tool requirements

Engineering Contradiction:

Improvesecure attachmentVSAvoidone-handed assembly

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentEP2126519B1Accident sensor

Publication Date: 2019.05.29 ROBERT BOSCH GMBH

Figure 1~2
Figure 3a~3c
Figure 4a~4c

AI summary

Disclosed is an accident sensor comprising fastening means for a vehicle. In order to mount the accident sensor, the fastening means allow the accident sensor to be inserted into an opening of a wall and be twisted into a final position defined by a stop. In the final position, the fastening means prevent the accident sensor from being twisted backward.