Reusable Fluid Packaging Device with Bayonet Locking and Segmented Sealing
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Solution Overview
Problem
Current packaging and distribution devices for liquid or viscous products, especially those using 'airless' dosing systems, face challenges in reusing components, maintaining sealing integrity, and accommodating various viscosities, while also being inefficient in mass production and space utilization.
Innovation Solution
A packaging and distribution device featuring a hollow body with a holding ring that axially blocks the tank part and head independently, allowing for easy disassembly and reuse without affecting the distribution circuit's integrity, and includes a bayonet-type connection system for secure fixation and easy unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the container-head connection area is sealed to prevent air ingress, then sealing integrity is improved, but access to the connection area is prevented, limiting reuse of parts
Solution Approach 1:
The device is divided into separable modules: the pump head assembly (with dosing pump and sealing elements) can be detached from the reservoir section. This segmentation allows the pump head to be reused with different reservoirs while maintaining sealing integrity through dedicated sealing elements at each connection interface.
Solution Approach 2:
A connection interface with sealing elements acts as an intermediary between the pump head and reservoir. This intermediary mechanism enables both secure sealing (preventing air ingress) and controlled separation (allowing reuse), resolving the contradiction between maintaining seal integrity and enabling part replacement.
2Reliability
If a necked container is used to secure the dosing pump, then sealing is improved, but filling rate slows down and mass production efficiency decreases
Solution Approach 1:
The container design separates the sealing function (at the mouth/opening) from the storage volume. The dosing pump seals against the container mouth without requiring a necked structure, allowing the main body to maintain a wide opening for high-speed filling while the sealing interface remains effective.
Solution Approach 2:
The dosing pump and sealing elements are pre-assembled on the pump head before attachment to the reservoir. This preliminary assembly ensures sealing integrity is established at the connection interface without requiring complex necked container structures, enabling efficient mass production.
3Reliability
If the container opening is narrowed to secure the dosing pump, then sealing is improved, but the size of the outer casing must be closely tied to the container, wasting internal space
Solution Approach 1:
The system separates the sealing function (concentrated at the container mouth and pump head interface) from the container body dimensions. This allows the outer casing to be optimally sized for space utilization while the sealing is maintained through dedicated sealing elements at the connection interface, not through container narrowing.
Solution Approach 2:
Sealing quality is concentrated locally at the connection interface between pump head and reservoir mouth, rather than requiring the entire container to be necked. This local sealing approach maintains high sealing reliability while allowing the container body to maintain optimal dimensions for space utilization.
4Adaptability or versatility
If the dosing pump is separated from the container for replacement, then reuse capability is improved, but air may ingress into the system, compromising the airless metering
Solution Approach 1:
The dosing pump is extracted as a separate component on the pump head assembly, which can be detached from the reservoir. However, the sealing elements and connection interfaces are designed to maintain the airless seal during separation and reconnection, enabling replacement without compromising metering integrity.
Solution Approach 2:
The connection interface with dedicated sealing elements acts as an intermediary that maintains the airless seal during assembly and disassembly operations. This intermediary mechanism allows the dosing pump to be replaced while preventing air ingress, resolving the contradiction between replacement capability and metering integrity.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a device (1) for packaging and dispensing a product, comprising a preassembled inner unit (25) to be mounted in a hollow body (2), with a dispensing head (6) which is surrounded by an upper connector (17) such that the body can be secured detachably. The inner unit comprises a reservoir, and the head sealingly closes the opening of said reservoir. A peripheral holder ring (24) of the inner unit holds the reservoir and the head together. The connector (17) connects to the body by means of a locking action achieved by the relative pivoting between the connector (17) and the body (2), without interference with the ring (24). An actuating portion of a dose metering pump of the head is accessible on the top via a duct of the connector, while a tubular outer portion (107) of the connector covers the zone where it is secured to the body, axially extending an outer wall of said body.