Syringe Attachment Web Pivoting Mechanism for Anti-Rotation
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Solution Overview
Problem
Attachments for syringes and carpules often detach due to relative rotation under rotational torque, leading to contamination and financial or health-related issues.
Innovation Solution
An attachment design featuring a main body with a coaxially arranged inner body connected by webs that pivot under torque, utilizing abutments to maximize contact force and prevent rotation, ensuring secure mounting on syringes or carpules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the attachment is firmly fixed to the syringe protrusion, then the security of mounting is improved, but the attachment may still rotate under rotational torque causing detachment
Solution Approach 1:
The web is designed to dynamically change its orientation from an initial angled position to a radial position under rotational torque. This dynamic adaptation allows the web to actively respond to applied forces, pivoting to engage abutments that prevent further rotation while maintaining firm mounting security.
Solution Approach 2:
The web's geometric parameter (orientation angle) changes from an acute angle to a radial alignment when torque is applied. This parameter change enables the web to transition from a static connection to an active anti-rotation mechanism, maximizing contact force against the protrusion.
2Force
If the web is positioned radially to maximize contact force, then rotational resistance is improved, but the web cannot adapt to applied torque
Solution Approach 1:
The web is designed to dynamically change its orientation from an initial angled position to a radial position under rotational torque. This dynamic adaptation allows the web to actively respond to applied forces, pivoting to engage abutments that prevent further rotation while maintaining firm mounting security.
Solution Approach 2:
The web is pre-positioned at an acute angle to the radial line, preparing it for the anticipated application of rotational torque. This preliminary positioning ensures that when torque is applied, the web can smoothly pivot into the optimal radial orientation for maximizing contact force, rather than starting from a perpendicular or random orientation.
3Ease of manufacture
If the attachment structure is simplified, then ease of manufacture is improved, but protection against manipulation is reduced
Solution Approach 1:
The attachment is segmented into distinct functional components: the web for mechanical engagement, abutments for rotation prevention, and a cap for sealing. This segmentation allows each component to be optimized for its specific function while maintaining overall manufacturing simplicity through integrated molding or assembly of standard parts.
Solution Approach 2:
The cap serves as an intermediary element that provides tamper protection without complicating the core attachment mechanism. The cap's predetermined rupture line provides visible tamper evidence, while the web-abutment-protrusion mechanism handles the mechanical securing, allowing each to be designed and manufactured independently.
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 attachment securely prevents rotation with respect to the syringe or carpule, enhancing protection against contamination and ensuring the integrity of the contents.
Implementation Method 1
If rotational torque is introduced in such an attachment, a web extending at an angle to an imaginary radial line pivots
Implementation Method 2
This is prevented by means of the abutment such that, when rotational torque acts on the attachment, webs can be pivoted up to the position in which a maximum contact force is exerted
Data Source
AI summary
An attachment for a syringe or carpule includes a main body that encloses an interior space, into which a protrusion of the syringe or carpule can be inserted. The main body has a jacket surrounding the interior space, and includes an inner body connected to the jacket and arranged coaxially thereto. The inner body has an inner wall that, in the attached state of the attachment, contacts an outer surface of the protrusion or of the syringe or carpule by means of an interior surface facing the interior space. The inner wall of the inner body is connected to the jacket of the attachment by a number of webs. At least one web encloses an angle together with an imaginary radially extending line, the angle being greater than 0° and acute.