Connector Lock Mechanism for Interference-Free Assembly

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Solution Overview

Problem

Existing connectors with locking mechanisms often suffer from structural complexity due to interference issues between components, and there is a need for the lock to perform functions other than locking without interfering with the lever.

Innovation Solution

A connector design featuring a lock receiving portion on the peripheral wall of the accommodating recess, allowing the lock to be positioned in a way that avoids interference with the lever, while also enabling the detection of the semi-assembled state of the mat seal cover through an assembling detection surface, and providing enhanced locking strength at the pull-out port.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the lock is disposed at a position to avoid interference with the lever, then the lever and lock will not interfere with one another, but the lock may interfere with another member such as a holder

Engineering Contradiction:
Improveoperation of leverVSAvoidstructural complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The lock receiving portion is positioned on the peripheral wall of the accommodating recess, utilizing the spatial dimension created by the recess structure. This allows the lock to engage from the inner side of the peripheral wall at a location that is spatially separated from both the lever's rotation path and the holder's position, thereby avoiding interference with all components simultaneously

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The lock receiving portion is nested within the accommodating recess structure, specifically on its peripheral wall. This nesting arrangement allows the lock to be positioned within the existing structural envelope of the housing, utilizing the recess as a containing structure that provides both spatial separation from the lever and structural support for the lock engagement

Inventive Principle:
Principle #7Nested doll (Nesting)

2Ease of operation

If the lock is retracted to a position to avoid interference with the lever, then the lever can rotate freely, but the retracted lock may interfere with another member such as a holder

Engineering Contradiction:
Improverotation of leverVSAvoidlocking function
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The lock receiving portion is positioned on the peripheral wall of the accommodating recess, utilizing the spatial dimension created by the recess structure. This allows the lock to engage from the inner side of the peripheral wall at a location that is spatially separated from both the lever's rotation path and the holder's position, thereby avoiding interference with all components simultaneously

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Reliability

If a lock is added to lock the wire cover to the housing body, then the wire cover can be secured, but the lock makes the entire structure complicated

Engineering Contradiction:
Improvelocking functionVSAvoidstructural complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The lock is designed to perform multiple functions: it provides the primary locking function to secure the wire cover to the housing, and simultaneously serves as an assembling detection mechanism. When the lock moves toward the lock receiving portion, it contacts the assembling detection surface on the mat seal cover to detect whether the mat seal cover is properly assembled, thereby eliminating the need for separate detection components

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The locking mechanism and the assembling detection function are merged into a single integrated system. The lock structure itself is used to detect the assembled state by contacting the assembling detection surface, combining two functions into one component arrangement and reducing overall structural complexity

Inventive Principle:
Principle #5Merging (Combining)

4Ease of operation

If the lock is positioned to engage from the inner side of the peripheral wall, then interference with the lever is avoided, but the locking strength may be reduced

Engineering Contradiction:
Improvelever operationVSAvoidlocking strength
Core Design Contradiction:
Ease of operationVSStrength

Solution Approach 1:

The locking system is segmented into multiple independent locking elements (first lock and second lock) that are distributed at different positions on the wire cover. This segmentation allows each lock to engage with its corresponding lock receiving portion on the peripheral wall, distributing the locking force across multiple engagement points and compensating for the reduced leverage effect of inner-side engagement

Inventive Principle:
Principle #1Segmentation

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

The solution simplifies the structure, enhances the functionality of the lock by allowing it to detect the assembled state, and ensures robust locking strength without interference, thereby improving the overall usability and reliability of the connector.

Implementation Method 1

a mat seal in the form of a resilient plate is arranged to face a back surface of the accommodating recess

Methodology Applied
Scientific EffectElasticity: Elasticity

Implementation Method 2

the lock moving toward the lock receiving portion contacts the assembling detection surface when the mat seal cover is in a semi-assembled state

Methodology Applied
Scientific EffectMechanical contact detection:

Data Source

PatentUS9948023B2Connector
Publication Date: 2018.04.17 SUMITOMO WIRING SYSTEMS LTD
  • US9948023B2 patent drawing
  • US9948023B2 patent drawing
  • US9948023B2 patent drawing

AI summary

A wire cover (70) is arranged to cover a rear surface of a mat seal cover (50) and includes a lock (78) to be locked to a lock receiving portion (27) of a housing (10). The lock receiving portion (27) is arranged at a position corresponding to a lever (90) covering an outer surface side of a peripheral wall (24) of an accommodating recess (23). The lock (78) is locked to the lock receiving portion (27) from an inner surface side of the peripheral wall (24) of the accommodating recess (23). The mat seal cover (50) has an assembling detection surface (55) with which the lock (78) moving toward the lock receiving portion (27) comes into contact when the mat seal cover (50) is in a semi-assembled state without being locked to the housing (10).