Shaving Coupling Mechanism with Stop for Secure Engagement

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Solution Overview

Problem

Existing coupling mechanisms for shaving devices fail to maintain engagement of the shaving cartridge with the handle when force is applied, leading to unintentional disengagement.

Innovation Solution

A coupling mechanism featuring a first coupling element with pivotable engagement surfaces and a second coupling element that moves between positions to impede or allow pivoting, ensuring secure engagement and easy disengagement of the shaving cartridge.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a simple coupling mechanism is used to allow easy engagement and disengagement, then ease of operation is improved, but reliability deteriorates due to unintentional disengagement under force

Engineering Contradiction:
Improveease of engagement and disengagementVSAvoidengagement stability under force
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The coupling mechanism employs dynamic elements including a pivotable first coupling element that can rotate about a pivot axis, and a movable second coupling element that transitions between first and second positions. This dynamic configuration allows the mechanism to adapt its engagement characteristics - providing secure locking during normal use while enabling controlled release when needed, thus resolving the contradiction between stability and ease of operation

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The stop element acts as an intermediary component positioned between the first coupling element and the second coupling element. This stop impedes pivoting of the first coupling element when the second coupling element is in the first position, preventing unintentional disengagement. The stop serves as a mediating structure that translates the position of the second coupling element into a constraint on the first coupling element, ensuring reliable engagement while maintaining ease of intentional disengagement

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS12202158B2Coupling mechanism
Publication Date: 2025.01.21 BIC VIOLEX SINGLE MEMBER SA
  • US12202158B2 patent drawing
  • US12202158B2 patent drawing
  • US12202158B2 patent drawing

AI summary

A coupling mechanism 10 comprising a first coupling element 20 having a first engagement surface 34 configured to pivot about a pivot axis located external to the coupling mechanism, a second coupling element 40 including a second engagement surface 52 configured to come into contact with the one or more first engagement surface, the second coupling element being capable of moving from a first position to a second position and from the second position to the first position, a third coupling element 60 configured to support the first coupling element and the second coupling element, a stop 58 positioned inwardly of the first coupling element configured to impede pivoting of the first coupling element. The stop impedes pivoting of the first coupling element when the second coupling element is in the first position and the stop no longer impedes movement of the first coupling element when the second coupling element is in the second position.