Cable Sealing Assembly With Positive Locking Against Twist and Pull
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Solution Overview
Problem
Existing cable sealing devices fail to reliably secure cables against twist and axial displacement, particularly under pulling forces, leading to potential damage of the cable jacket and optical fiber elements, and complicate assembly due to multiple small parts and complex mounting requirements.
Innovation Solution
A cable sealing device with a positive locking mechanism using existing attaching part formations on the cable, featuring a sealing part with an inner and outer seal, and a fixation part with circumferential and longitudinal positive locking faces, allowing secure mounting and dismounting without projecting into the cable's accommodating space, simplifying assembly and preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cable sealing device uses only grip means and pressing force for securing, then the device structure remains simple, but the cable cannot be reliably prevented from twist and axial displacement under pulling forces
Solution Approach 1:
The cable sealing device is divided into distinct functional segments: the grip means for radial securing, the sealing part for sealing, and the fixation part with positive locking mechanism for preventing twist and axial displacement. This segmentation allows each component to perform its specific function effectively while maintaining overall structural clarity.
Solution Approach 2:
The fixation part acts as an intermediary element between the grip means and the cable, providing the positive locking mechanism through circumferential and longitudinal locking faces. This intermediary structure translates the pressing force into reliable anti-twist and anti-displacement locking without requiring direct complex interaction between the grip means and the cable.
2Area of stationary object
If the cable sealing device is mounted adjacent to the attaching part, then the cable can be secured, but the attaching part projects into the accommodating space reducing the space available for operations and connectors
Solution Approach 1:
The fixation part extends the securing mechanism into the longitudinal dimension with locking faces that engage with the cable's attaching part. This dimensional extension allows the sealing device to be mounted further from the cable end while still providing reliable securing, thereby preventing the attaching part from projecting into the accommodating space and maintaining sufficient operation space for connectors and other components.
3Reliability
If multiple small parts are used for the cable sealing device, then the sealing function can be achieved, but the assembly becomes complicated due to the plurality of parts and mounting effort
Solution Approach 1:
The grip means, sealing part, and fixation part are designed to work together as an integrated assembly. The fixation part combines both circumferential and longitudinal locking functions in a single component structure, and the sealing part integrates the sealing function with the positive locking mechanism. This merging reduces the number of separate small parts and simplifies the assembly process while maintaining reliable sealing performance.
Data Source
AI summary
A cable sealing device including an attaching part securable to the cable; a fixation part adapted to be mountable on the attaching part; and a sealing part. The attaching part includes outer locking faces. The fixation part has inner abutment faces adapted to co-operate with the outer locking faces to axially and rotationally lock the fixation part relative to the attaching part. The sealing part includes an inner seal and an outer seal. The sealing part also includes a second securing arrangement that is configured to engage a first securing arrangement of the fixation part to axially and rotationally lock the sealing part to the fixation part.