Waterproof Blade Connector with Hot Melt Adhesive Sealing
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Solution Overview
Problem
Conventional waterproof connectors face issues with uneven gasket distribution leading to reduced water resistance due to complex assembly processes and potential for elastic fatigue or thermal expansion, resulting in defective connections.
Innovation Solution
A waterproof blade type connector design featuring a cover plate locked into a frame with hot melt adhesive filling a packing groove and surrounding space, along with a projecting piece forming locking grooves and mounting internally-threaded inserts for secure connections, simplifying assembly and enhancing sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gasket or packing ring is mounted into the connector and the cap is fastened onto the housing by screwing, then the connector achieves waterproof sealing, but the assembly process becomes complicated and the gasket distribution becomes uneven
Solution Approach 1:
The gasket is extracted from the traditional multi-step assembly process and integrated directly into the housing structure as a pre-installed component. This eliminates the need for separate gasket mounting steps and simplifies the overall assembly process while maintaining waterproof sealing reliability.
Solution Approach 2:
The gasket is pre-installed and pre-positioned into the housing before the main assembly operation. This preliminary action ensures even gasket distribution and eliminates the complexity of mounting the gasket during the final assembly step, thereby simplifying the overall process while ensuring reliable waterproof sealing.
2Reliability
If the cap is fastened tightly onto the housing, then waterproof sealing is achieved, but elastic fatigue or shrinkage after long term use may result in loss of water resistance
Solution Approach 1:
The gasket is designed with pre-compression features that provide cushioning and compensation for elastic fatigue and shrinkage that may occur during long-term use. This beforehand cushioning ensures that the waterproof sealing capability is maintained over extended periods despite material degradation.
Solution Approach 2:
The gasket material and compression parameters are optimized to maintain effective sealing pressure over time. By carefully selecting material properties and compression rates, the system compensates for elastic fatigue and shrinkage, ensuring long-term water resistance without requiring excessive initial compression.
3Reliability
If the gasket or packing ring is held tightly by the cap in combination with the housing, then sealing is achieved, but the gasket is not mounted and held evenly and smoothly owing to difference in force applied
Solution Approach 1:
The gasket is pre-installed into the housing with precise positioning features that ensure even distribution before the cap is fastened. This preliminary positioning action eliminates the problem of uneven gasket mounting caused by differential forces during the fastening process, as the gasket is already in its correct position.
Solution Approach 2:
The housing structure incorporates localized features such as recesses, grooves, or positioning elements that ensure the gasket is held evenly and smoothly at each location. These local quality enhancements compensate for differential forces during assembly, ensuring uniform gasket distribution and reliable sealing throughout the entire connection interface.
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 design ensures even sealing, increased water resistance, and simplified assembly, reducing defective rates and maintaining effective waterproofing over time despite potential thermal changes.
Implementation Method 1
A hot melt adhesive layer in liquid form is flowing along a path between the frame and the cover plate to fill up a first packing groove
Data Source
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AI summary
A waterproof blade type connector composed of a first connecting member with first terminals and a second connecting member with second terminals is revealed, whereas the first and second terminals are electrically connected to each other. The second connecting member includes a base disposed on one end and a frame arranged at the base. A mounting space is enclosed by the frame while two locking grooves are arranged at two opposite sides of the frame symmetrically. A pin is extended from the second terminal toward the mounting space and a cover plate is mounted in the mounting space. A locking block corresponding to the locking groove is disposed on each of two ends of the cover plate. A first packing groove is formed on the periphery of the cover plate and filled with a hot melt adhesive layer while space around the pin is also sealed by the hot melt adhesive layer. Thus both easy assembly and effective waterproofing are achieved.