Connection Device for Perforatable Stopper and Syringe
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Solution Overview
Problem
Existing connection devices for containers with perforable stoppers and syringes are complex, costly, and inefficient, with high dead volumes leading to product loss and compatibility issues with syringes without needles.
Innovation Solution
A connection device featuring a one-piece base with a central bore for a needle and a sealing sleeve, allowing intuitive translational assembly without rotation, compatible with syringes with or without needles, and minimizing dead volume through a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If a guide piece with cylindrical body and sleeve is used to connect bottle to syringe, then the stopper can be perforated, but the dead volume extends to the level of the syringe nose causing significant product loss
Solution Approach 1:
The invention extracts the sealing function from a separate elastic material component and integrates it into a sealing sleeve that is part of the guide piece structure. The sealing sleeve is positioned to contact the needle directly, eliminating the need for additional elastic sealing materials that would create dead volume. This extraction of the sealing function to a dedicated component resolves the contradiction by reducing product loss without significantly increasing device complexity.
Solution Approach 2:
The invention implements a nested structure where the needle is received within the sealing sleeve, which itself is part of the guide piece. The sealing sleeve is arranged in the central bore around the needle, creating a nested arrangement that minimizes dead volume while maintaining sealing effectiveness. This nesting principle allows the sealing function to be integrated into the existing structure without adding significant complexity.
2Adaptability or versatility
If an adapter is used that cooperates with standard syringe provided with needle, then connection is achieved, but the device is not compatible with syringe without needle and leakage risks increase
Solution Approach 1:
The invention creates a universal connection device where the guide piece with central bore and sealing sleeve can accommodate both syringes with needles and syringes without needles. The sealing sleeve is positioned to seal around the needle when present, or around the syringe tip when no needle is used. This multi-functional design achieves adaptability while maintaining reliability through the consistent sealing mechanism that adapts to different syringe configurations.
Solution Approach 2:
The invention implements a dynamic sealing approach where the sealing sleeve can adapt its sealing position and contact point based on whether a needle is present. The sleeve is arranged to contact the needle along its length, providing continuous sealing that maintains reliability regardless of syringe configuration. This dynamic adaptability resolves the contradiction between versatility and reliability.
3Ease of operation
If equipment with specific rotation manipulations is used for reconstitution, then injection can be performed, but the implementation is long and complex requiring specific order of manipulations
Solution Approach 1:
The invention implements preliminary action by pre-positioning the sealing sleeve and perforation member in the guide piece before use. The piercing member is already in place to perforate the stopper, and the sealing sleeve is pre-positioned to seal around the needle. This preliminary preparation eliminates the need for complex rotation manipulations during reconstitution, allowing simple translational movements only, thereby reducing both operational complexity and time required.
Solution Approach 2:
The invention inverts the conventional approach by having the guide piece actively perforate the stopper through the piercing member, rather than requiring the user to manually pierce the stopper. The piercing member extends through the guide piece and automatically perforates the stopper when the syringe is inserted. This inversion of the piercing action from user-manual to device-automatic simplifies the operation sequence and reduces time required.
4Loss of substance
If elastic material is used for sealing between syringe end and fixing part, then sealing is achieved, but the dead volume extends significantly causing product loss
Solution Approach 1:
The invention extracts the sealing function from generic elastic material and implements it in a dedicated sealing sleeve component with optimized geometry. The sealing sleeve is specifically designed to contact the needle and provide sealing with minimal dead volume. This extraction allows the sealing function to be performed efficiently without the excessive dead volume associated with bulk elastic materials, resolving the contradiction between product loss and sealing effectiveness.
Solution Approach 2:
The invention employs a sealing sleeve that functions as a flexible shell conforming to the needle shape. The sealing sleeve is arranged in the central bore around the needle, providing a flexible seal that adapts to the needle diameter while maintaining minimal dead volume. This flexible shell approach achieves reliable sealing without the excessive material volume of traditional elastic sealing components, resolving the contradiction between sealing effectiveness and product loss.
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 simplifies the assembly process, reduces product loss, and lowers manufacturing costs by eliminating complex rotations and minimizing dead volume, while ensuring compatibility and effective sealing.
Implementation Method 1
the perforating member can be provided to perforate the stopper of the container due to the sole positioning of this base on the neck of the container
Implementation Method 2
a sealing sleeve is arranged in the central bore, around the needle and in contact with the latter
Data Source
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AI summary
The invention relates to a device (10) for connection between a recipient having a neck closed by a perforatable stopper and a container to be provided with a needle (62). Said device comprises a base (20) on which the container can be mounted, said base defining a central bore (26) and comprising means (22) for mounting on the recipient. A needle (62) pertaining to a sub-set (60) that is engaged in the central bore (26) forming part of the connection device (10) and is to be mounted on the container is arranged in the central bore (26), parallel to a longitudinal axis (X26) of said bore. A sealing sleeve (40) is arranged in the central bore (26), around the needle (62) and in contact therewith. The base (20) is a single component and comprises a body (28) for perforating the stopper, said body extending from an intermediate wall (21) of the base, away from the central bore (26), parallel to the central axis (X26) of the bore and up to a distal end (282). The perforating body (28) is hollow and the inner space (V28) thereof communicates with the central bore (26) and with a space (V22) that radially surrounds the distal end (282) of the perforating body.