Lever-Type Connector Fitting Detection via 2D Code
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing connector fitting detection methods using linear protrusions and recesses are prone to instability due to manufacturing tolerances, molding defects, and rattling issues, leading to unreliable data acquisition.
Innovation Solution
A lever-type connector with a rotatable lever, a holding portion, and a fitting assurance member that forms a two-dimensional code when properly fitted, allowing for accurate detection of a secure connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If linear protrusions and recesses are used for fitting detection, then the connector can detect whether housings are properly fitted, but the data stability becomes unreliable due to manufacturing tolerances and defects
Solution Approach 1:
The patent transitions from one-dimensional linear protrusions and recesses to two-dimensional code patterns on the connector surfaces. This dimensional change allows for more robust fitting detection because 2D patterns provide redundant information and are less sensitive to manufacturing variations, chipping, or misalignment compared to 1D linear features.
Solution Approach 2:
The patent uses visual code patterns (analogous to color changes) on the connector surfaces that can be detected by imaging devices. These visual patterns provide stable, distinguishable features for fitting detection that are less susceptible to manufacturing tolerances compared to precise linear geometric features.
2Loss of information
If marks are provided on connector surfaces for reading, then fitting status can be recorded, but manufacturing defects and chipping cause unstable reflected light data
Solution Approach 1:
The patent employs two-dimensional code patterns instead of simple linear marks. The 2D structure provides redundancy and error tolerance, allowing the fitting status to be accurately read even when parts of the code are damaged or misaligned due to manufacturing defects or chipping.
3Difficulty of detecting and measuring
If protrusions are polished to have different light reflectance, then light sensor detection is enabled, but manufacturing complexity and cost increase
Solution Approach 1:
The patent uses visual code patterns with distinct visual characteristics (analogous to color changes) that can be detected by imaging devices without requiring complex surface polishing or specialized material properties. The detection relies on pattern recognition rather than precise optical property manipulation.
Data Source
AI summary
A lever-type connector 1 includes: a connector housing 10; a lever 30; a CPA holding portion 21 that is provided on one of the connector housing 10 and the lever 30 and has a first code arrangement surface 22S1; a CPA member 40 that is attached to the CPA holding portion 21, is displaceable from a standby position to a fitting assurance position when the lever 30 is at a fitting assurance position, and is arranged on the same plane as the first code arrangement surface 41S1 when the lever 30 is at the fitting assurance position; a first divided code arranged on the first code arrangement surface 22S1; and a second divided code 50B arranged on the second code arrangement surface 41S1.