Fluid Dispenser Cam Lug Rotary Connection

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Solution Overview

Problem

Existing fluid product distributors face issues with the rotation of the reservoir during the connection process, which can lead to instability and an unpleasant user experience.

Innovation Solution

The distributor incorporates a cam path and a lug system with a spring mechanism, where the cam path and lug are formed by a rotary organ, allowing the lug to follow the cam path without rotating the reservoir.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a cam path and lug system are used for connection, then the connection mechanism is improved, but the reservoir rotates during the connection process causing instability

Engineering Contradiction:
Improveconnection mechanismVSAvoidreservoir stability
Core Design Contradiction:
ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent inverts the traditional cam mechanism by making the cam path fixed and the lug rotatable, or vice versa. Instead of the reservoir rotating to engage the cam path, the lug or cam path rotates independently while the reservoir remains stationary. This inversion resolves the contradiction by maintaining reliable cam-based connection while eliminating reservoir rotation and instability.

Inventive Principle:
Principle #13The other way round (Inversion)

2Ease of operation

If the reservoir is made accessible for grasping, then connection/disconnection is enabled, but the aesthetics of the dispenser is compromised

Engineering Contradiction:
Improvereservoir accessibilityVSAvoiddispenser aesthetics
Core Design Contradiction:
Ease of operationVSShape

Solution Approach 1:

The patent extracts the rotational connection mechanism from the reservoir body itself. By making the cam path or lug rotatable independently, the reservoir can be designed with a fully aesthetic, seamless appearance without visible grasping features. The operational interface is extracted to a separate rotating element that does not compromise the reservoir's visual design.

Inventive Principle:
Principle #2Taking out (Extraction)

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

This design ensures that the reservoir remains stationary during the connection process, providing a sense of stability and quality to the user, while also masking the operation of the connection.

Implementation Method 1

a spring for urging the lug out of the cam path

Methodology Applied
Scientific EffectSpring: Spring

Data Source

PatentEP4337389B1Fluid product dispenser
Publication Date: 2025.04.23 APTAR FRANCE SAS
  • EP4337389B1 patent drawingFigure 1~3
  • EP4337389B1 patent drawingFigure 4~5
  • EP4337389B1 patent drawingFigure 6~7

AI summary

The invention relates to a fluid product dispenser comprising: - a fluid product reservoir (R) comprising a neck (R3), and - an assembly (E) comprising a dispensing member (P), such as a pump or a valve, the dispenser comprising at least one cam track (22) and at least one lug (41) designed to follow the cam track (22) and a spring (5) for urging the lug (41) out of the cam track (22), the cam track (22) being integral with one of the fluid product reservoir (R) and the assembly (E) and the lug being integral with the other of the fluid product reservoir (R) and the assembly (E), characterized in that one of the cam track (22) and the lug (41) is formed by a rotary member (4).