Bone Cement Mixing Device Deformable Reservoir Ampoule Opening
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Solution Overview
Problem
Existing devices for providing bone cement dough face challenges in simplifying the opening of monomer liquid ampoules, risking air inclusion and requiring additional tools, with unstable connections that can lead to conduit bending or damage.
Innovation Solution
A device with a deformable reservoir container that allows ampoules to be tilted for fluid-conducting opening, connected to a mixing unit via two positive connections, ensuring stable force distribution and minimizing ampoule damage, using a conduit that extends over 70% of the cartridge's interior length for efficient monomer liquid delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the container and cartridge are connected by a positive fit, then the connection is stable, but opening the container by tilting the cartridge causes the conduit to kink
Solution Approach 1:
The connection between the container and cartridge is designed to transition from a rigid positive fit during normal operation to a flexible state during opening. The container includes a deformable wall section that allows the connection to accommodate tilting movements without kinking the conduit, enabling dynamic adaptation between stability and flexibility based on operational phase.
Solution Approach 2:
The container wall is designed with a deformable section that acts as a flexible element. This flexible wall section allows the container to be tilted during opening without transmitting excessive force to the rigid conduit connection, preventing kinking while maintaining connection integrity during normal use.
2Reliability
If additional tools are used to open ampoules, then ampoule opening is more controlled, but device complexity increases
Solution Approach 1:
The ampoule opening function is merged with the existing container structure. The deformable wall section of the container serves dual purposes: maintaining sealed storage during transport and providing the mechanical action needed to break the ampoule seal during use. This integration eliminates the need for separate opening tools while maintaining controlled opening.
Solution Approach 2:
The container structure is designed to perform multiple functions: it serves as the storage vessel for the monomer liquid, provides the connection interface to the cartridge, and simultaneously acts as the opening mechanism for the ampoule. This multi-functionality reduces the overall number of components needed in the system.
3Ease of operation
If the conduit is made flexible to prevent kinking, then ease of operation improves, but connection stability deteriorates
Solution Approach 1:
The connection system transitions from a static rigid connection to a dynamic system that adapts its rigidity based on operational phase. During normal operation, the positive fit provides rigid stability. During opening, the deformable container wall allows controlled flexibility to accommodate tilting without conduit damage.
Solution Approach 2:
The container wall is segmented into rigid sections and a deformable section. The rigid sections maintain connection stability during operation, while the deformable section provides controlled flexibility during opening. This segmentation allows different parts of the same structure to have different mechanical properties as needed.
Data Source
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AI summary
Device 100 for providing a bone cement paste 520 from two starting components, comprising a mixing unit 200, a hollow cylindrical cartridge 210 with an interior 215, wherein a bone cement powder 500 is stored in the interior as the first starting component, and a cartridge head 220, which fluidly closes the interior at a proximal cartridge end 211, and a reservoir 300 for a monomer liquid 510 as the second starting component, comprising a conducting element 310, which fluidly connects the interior of the mixing unit to the reservoir, wherein the conducting element extends through a cartridge head passage 225 of the cartridge head of the mixing unit and the conducting element and the cartridge head passage form a first positive connection 400.