Cord Dispenser Cap Geometry to Prevent Seal Cord Slipback
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Solution Overview
Problem
Existing cord dispensers for sealing threaded pipework are difficult to handle and prone to the cord slipping back into the dispenser during transportation, rendering it unusable.
Innovation Solution
The dispenser features a cap with a protrusion that engages the opening rim to clamp the cord, preventing it from slipping back into the dispenser, and includes a design where the cap lies within the plane of the dispenser's top edge when open, avoiding obstacles for the cord.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cap is pivotally connected to the lid member and covers the opening in a closed position, then the dispenser can be sealed and stored, but the cord can get caught on the unfolded cap during circular swiveling motion, making it difficult to seal the thread
Solution Approach 1:
The cap is completely separated from the hollow body, allowing it to be removed entirely. This extraction eliminates the interference problem where the cap would catch the cord during winding operations, while the cap can still be used to cover and seal the opening when needed.
Solution Approach 2:
The dispenser is divided into separate components: the hollow body and the cap are completely separable. This segmentation allows the cap to be removed when cord winding is needed, avoiding the contradiction between sealing capability and winding ease.
2Ease of operation
If the screw cap is completely separated from the hollow body, then the cap does not impede the winding of the cord onto the thread, but the screw cap can be got lost
Solution Approach 1:
The cap features an integrated cord clamping mechanism with a protrusion that automatically secures the cord end when the cap is in the closed position. This self-service feature ensures the cord remains retained without requiring additional components or complex mechanisms, preventing the cap from being lost while maintaining ease of operation.
3Reliability
If the cap is placed in the closed position to cover the opening, then the dispenser can be stored or transported, but the free end of the cord will slip through the opening into the hollow body due to vibrations
Solution Approach 1:
The protrusion on the cap is designed to clamp the cord end in advance before transportation vibrations can cause it to slip into the hollow body. This preliminary anti-action prevents the harmful effect of vibration-induced cord displacement, ensuring the cord remains securely positioned during storage and transport.
4Ease of operation
If the opening is made larger to facilitate cord removal, then the cord can be easily pulled out, but the cord may inadvertently slip back into the hollow body during transportation
Solution Approach 1:
The cap structure provides different local qualities: the opening area allows easy cord removal, while the protrusion area provides secure clamping to prevent inadvertent slipping back. This local differentiation resolves the contradiction between ease of removal and retention reliability during transportation.
Data Source
AI summary
The invention relates to a dispenser (1) for a cord, preferably for a cord for sealing a threaded pipework, comprising a hollow body (10) for receiving the cord, a cover part (30) being arranged on a top edge (13) of the hollow body (10) and having an opening (41) through which the thread can be removed from the hollow body (10), and a cap (60) which is connected to the cover part (30) so as to be pivotable about a pivot axis (40) and, in a closed position, covers the opening (41). The dispenser (1) is characterized in that the cap (60) has a protrusion (65) which, in the closed position of the cap (60), engages in the opening (41), so that the cord can be clamped between the protrusion (65) and opening rim (42) and wherein the cap member (30) comprises an upper surface (35) lying in a plane (36), a lower surface (37) and a preferably step-shaped transition area (49) between the upper surface (35) and the lower surface (37), wherein the opening (41) for the cord is provided on the upper surface (35) or in the vicinity thereof, and wherein the cap (60) in the opened end position is arranged in or below the plane (36) of the upper surface (35).