Trigger Dispensing Head Sleeve for Reduced-Dose Delivery
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Solution Overview
Problem
Existing trigger dispensing devices face challenges in delivering reduced doses while maintaining simplicity and manufacturability, due to complex miniaturization requirements and compliance with molding conditions.
Innovation Solution
A trigger dispensing head design featuring a sleeve with a labyrinth seal and interchangeable components, including a rotatable or fixed sleeve, allows for reduced dose delivery without complete redesign, utilizing a frame that supports the head's components and incorporates a piston chamber with adjustable valve means for precise dose control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the bore of the head frame is varied to achieve reduced dose delivery, then the delivered dosage is reduced, but the design and production complexity increases due to compliance with molding conditions
Solution Approach 1:
The invention divides the piston chamber into two separate components: a piston and a sleeve. The sleeve is a distinct element that can be interchangeably mounted on the piston, allowing different sleeve configurations to achieve different dosage volumes without redesigning the entire piston chamber. This segmentation enables reduced dose delivery while maintaining manufacturing simplicity.
Solution Approach 2:
The sleeve serves multiple functions: it defines the piston chamber volume, provides sealing through the labyrinth seal, and can be interchanged to adjust dosage. The frame is designed to accommodate different sleeve configurations, making the system universally adaptable for various dosage requirements without complete redesign.
2Quantity of substance
If the piston chamber volume is reduced to deliver smaller doses, then the delivered dosage is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
By separating the piston chamber into a piston and a removable sleeve, the invention allows precise volume control through the sleeve's dimensions rather than requiring high-precision molding of the entire piston chamber. The sleeve can be manufactured with precise dimensions independently, reducing the overall manufacturing precision burden on the main frame.
3Quantity of substance
If the piston chamber volume is reduced, then the delivered dosage is reduced, but the product loss increases
Solution Approach 1:
The invention employs a labyrinth seal formed by flexible or elastomeric sealing elements between the piston and sleeve, and between the sleeve and frame. These flexible sealing structures effectively prevent product leakage and loss, ensuring that reduced dosage delivery does not come at the cost of increased product waste.
4Ease of operation
If the sleeve is made rotatable to improve operation, then the ease of operation increases, but the device complexity increases
Solution Approach 1:
Instead of making the entire piston assembly rotatable or complex, the invention allows the sleeve to be simply rotated or removed and replaced. This inverted approach simplifies the mechanism by making only the dosage-defining component (sleeve) adjustable rather than the entire piston system, thereby improving ease of operation without significantly increasing device complexity.
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
Enables efficient dispensing of reduced doses with minimal component changes, ensuring manufacturability and reducing product loss through the labyrinth seal, while maintaining operational efficiency.
Implementation Method 1
reducing product loss through the labyrinth seal
Data Source
AI summary
Provided is a trigger dispensing head applicable to a bottle of a trigger dispensing device having a cylinder chamber, a main vent passage, a sleeve, a secondary vent passage, a manually-operable piston, a suction duct, and a dispensing duct. The sleeve is provided with an annular inner sleeve wall delimiting a pressure chamber, and an annular outer sleeve wall externally spaced from the annular inner sleeve wall.