Spray Head Insert With Deformable Tabs For Impact Resistance
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Solution Overview
Problem
Existing fluid dispenser devices with swirl chambers are prone to mechanical stress and impact damage, leading to changes in the spray profile and poor spray quality due to material creep and potential misalignment of the inner nozzle during drop tests.
Innovation Solution
A spray head design featuring an elastically-deformable insert with deformable tabs, overmolded portions, and radial openings that absorb and compensate for dimensional variations and movements, ensuring reliable operation and improved impact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rigid insert is used in the expulsion channel to define the spray profile, then the spray quality is maintained under normal conditions, but the spray profile becomes sensitive to impact and material creep, leading to misalignment and poor spray quality after drop tests
Solution Approach 1:
The insert is designed with an elastically-deformable portion that allows it to dynamically adjust its position and shape in response to mechanical stresses, impacts, and material creep. This dynamic capability enables the insert to absorb shocks and maintain proper alignment with the spray profile throughout the device's lifetime, resolving the contradiction between initial precision and long-term reliability.
Solution Approach 2:
The insert's physical state is changed from rigid to elastically-deformable, allowing it to change its dimensional parameters in response to external forces. This parameter change enables the insert to compensate for variations in the body dimensions and maintain reliable spray profile alignment even after impacts or during material creep, thus improving reliability without sacrificing manufacturing precision.
2Ease of manufacture
If the insert is made from a single rigid material, then the manufacturing is simple, but the insert cannot compensate for dimensional variations and movements, leading to unreliable operation
Solution Approach 1:
The insert is constructed as a composite structure combining a rigid portion and an elastically-deformable portion, each serving distinct functions. The rigid portion maintains structural integrity and shape definition, while the elastically-deformable portion compensates for dimensional variations and movements. This composite approach maintains manufacturing simplicity while dramatically improving operational reliability.
3Manufacturing precision
If the spray profile components are tightly fitted to ensure proper spray formation, then the spray quality is good initially, but the mechanical stresses cause creep and shape changes over time, degrading spray quality
Solution Approach 1:
The elastically-deformable portion of the insert acts as a pre-designed cushioning element that anticipates and absorbs mechanical stresses before they can cause permanent deformation or creep. This beforehand cushioning protects the spray profile geometry from stress-induced changes, maintaining both initial precision and long-term durability of the spray quality.
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 design enhances the spray head's ability to withstand impacts and material creep, maintaining reliable spray quality and integrity throughout the device's lifetime by providing a spring-like effect that maintains proper alignment and contact between components.
Implementation Method 1
an elastically-deformable portion (21) that is adapted to deform so as to absorb and/or compensate variations in the dimensions of said body and/or of said insert, and/or so as to compensate deformations and/or movements of said insert in said body
Data Source
AI summary
A spray head for a fluid dispenser device, having a body with an expulsion channel terminated by a dispenser orifice, an insert in the expulsion channel, the end of the insert is co-operates with the downstream end portion of the expulsion channel to define a spray profile. The insert includes an elastically-deformable portion adapted to deform to absorb and/or compensate for variations in the dimensions of the body and/or insert, and/or to compensate for deformations and/or movements of the insert. The elastically-deformable portion of the insert has tabs that are axially and/or radially deformable, and/or an overmolded portion made of deformable material, and/or one or more radial openings that pass through the insert, and/or at least one sloping strip of deformable material.