Conical Bellows Pump Structure for Stable Low-Cost Dispensing
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Solution Overview
Problem
Existing pump devices for liquid, pasty, or foamable skin cleansing preparations are complex and expensive to manufacture, requiring undercuts and lateral guides, making them cumbersome to insert into dispenser devices and prone to damage during use.
Innovation Solution
A pump device with a conically tapering bellows formed by ring-shaped base and wall elements connected by a film hinge, eliminating undercuts and providing increased rigidity and stability, allowing for easy insertion and compression to match the container's dimensions, along with a design that prevents the bellows from snapping beyond its dead center position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the bellows is designed with lateral guide means in the form of rods fastened to both ends, then the bellows stability is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent removes the lateral guide means (rods) from the bellows design, extracting the problematic component that caused complexity and manufacturing difficulties while maintaining bellows stability through the conical design alone
Solution Approach 2:
The patent employs a conical (curved) bellows design where the diameter decreases toward the free end, using geometric curvature to provide inherent stability and prevent lateral deflection during insertion, eliminating the need for additional guide rods
2Productivity
If the bellows is designed with helically twisted folds, then the pumping function is improved, but the manufacturing cost increases
Solution Approach 1:
The patent replaces complex helically twisted folds with a simpler conical geometry where the bellows elements are arranged in a tapered configuration, maintaining the pumping function through the conical shape while significantly simplifying manufacturing processes
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 enables the production of a cost-effective, stable pump device that can be easily inserted into dispenser devices and maintains a compressed state during use, reducing the risk of damage and improving operational efficiency.
Implementation Method 1
each bellows element comprises a ring-shaped base element and a ring-shaped wall element connected thereto by a ring-shaped film hinge
Data Source
Figure 1~1a
Figure 1b~1c
Figure 2~3
AI summary
The invention relates to a pump device for a container for liquid, pasty or foamable skin cleansing and care preparations, e.g. B. for liquid soaps, disinfectants, skin protection pastes or cream, wherein the pumping device comprises a conically tapering bellows chamber, wherein the bellows has several bellows elements each having a different diameter, at least one smaller bellows element being able to be pressed into an adjacent larger bellows element.