Needle Shield Remover With Edge-Peel Adhesive Liner Release
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Solution Overview
Problem
Existing wearable injector devices face challenges in reliably and intuitively removing the needle shield and liner without complex manufacturing processes and user confusion, particularly due to the need for 'inside-out' peeling that requires perforations in the liner.
Innovation Solution
A drug delivery system with a needle shield remover featuring an elongated member that extends along the housing, coupled to the liner at the edge, allowing for intuitive 'outside-in' peeling of the liner by pivoting and pulling, eliminating the need for complex cuts or perforations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the liner is removed via inside-out peeling with central perforations, then the needle shield and liner can be removed in a single step, but the manufacturing process becomes complex and the user operation becomes non-intuitive
Solution Approach 1:
The patent inverts the conventional inside-out peeling approach by implementing an outside-in removal mechanism. The elongated member is coupled to the liner at the periphery (edge location) rather than the center, allowing the liner to be peeled from the outside edge inward. This eliminates the need for central perforations and kiss-cuts, simplifying manufacturing while maintaining single-step removal functionality.
Solution Approach 2:
The patent segments the liner removal process by coupling the elongated member to a specific location on the liner (edge location) rather than requiring perforations throughout the liner. This localized coupling point allows for controlled peeling from the edge inward, simplifying the manufacturing process while maintaining operational effectiveness.
2Productivity
If the liner is removed from the center inward, then single-step removal is achieved, but the adhesive pad may be damaged due to impulse loading
Solution Approach 1:
The patent inverts the removal direction from center-inward to outside-in. By coupling the elongated member to the liner at the periphery and peeling from the edge inward, the force is applied at the edge rather than the center, preventing impulse loading damage to the adhesive pad while maintaining rapid single-step removal capability.
Solution Approach 2:
The patent performs preliminary action by coupling the elongated member to the liner at the edge location before removal begins. This pre-positioning of the coupling point at the periphery ensures that when the elongated member is actuated, the peeling force is applied optimally at the edge rather than the center, protecting the adhesive pad from damage while enabling rapid removal.
3Object-affected harmful factors
If the needle shield remover is centrally positioned, then it provides good protection, but the liner removal becomes awkward and non-intuitive
Solution Approach 1:
The patent introduces asymmetry by positioning the coupling between the elongated member and liner at the periphery rather than the center. This asymmetric placement at the edge location maintains the protective function of the needle shield remover while enabling intuitive outside-in peeling of the liner, resolving the contradiction between protection and ease of operation.
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
Facilitates easy and reliable removal of the needle shield and liner in a single step, enhancing user experience and reducing manufacturing complexity while maintaining adhesive integrity.
Implementation Method 1
an adhesive pad element (200) coupled to the bottom portion (24) of the housing (20)
Implementation Method 2
the elongated member (212) is pivotable from a first position to a second position
Implementation Method 3
an adhesive on the elongated member (212) to the liner (204)
Implementation Method 4
pulling force on the grasping portion (210) not only removes the needle shield, but also acts to remove the liner over the adhesive pad
Data Source
AI summary
A drug delivery system includes a housing, a needle having a retracted position within the housing and an extended position outside of the housing, an adhesive pad element coupled to a bottom portion of the housing, the adhesive pad element including a primary adhesive layer and a removable liner, and a needle shield portion. The system also includes a needle shield remover having an elongated member configured to extend along the bottom portion of the housing in a first position and extend away from the bottom portion of the housing in a second position, a bottom surface portion of the elongated member being coupled to the removable liner proximate to an edge location of the adhesive pad element such that the removable liner is peeled away from the primary adhesive layer when the elongated member of the needle shield remover is moved from the first position to the second position.