Connector Molding Nesting for Moisture Sealing
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Solution Overview
Problem
The existing connector molding designs are prone to moisture and humidity infiltration due to exposed portions of the fixing member, compromising the airtightness of electronic control devices like electric throttle devices.
Innovation Solution
The connector molding integrates conductors and a fixing member with a molded body, where the external connection end protrudes into the connector portion, and either a part of the fixing member is exposed within the connector space while the rest is covered, or the entire fixing member is encapsulated, enhancing sealing by using snap-fit structures and mold support to prevent exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the receiving portion is disposed outside the connector portion to facilitate mold removal, then the manufacturing process is simplified, but moisture and humidity can infiltrate through the exposed primary molded body
Solution Approach 1:
The primary molded body is nested within the connector portion by disposing the receiving portion inside the connector portion rather than outside. This nesting arrangement allows the primary molded body to be fully contained within the sealed environment, preventing moisture infiltration while still enabling straightforward mold removal during manufacturing.
2Ease of operation
If the primary molded body is exposed outside the connector portion for easy access, then assembly is simplified, but airtightness is compromised
Solution Approach 1:
The receiving portion is positioned inside the connector portion, nesting the primary molded body within the sealed connector environment. This eliminates exposure to external moisture while maintaining assembly integrity, as the primary molded body remains accessible within the internal space during assembly operations.
Solution Approach 2:
A seal member is introduced to create a sealing barrier between the primary molded body and the external environment. This flexible sealing element prevents moisture infiltration through the connection interface while allowing the primary molded body to remain positioned within the connector portion for assembly purposes.
3Productivity
If connection pins are integrally molded with the cover and case, then manufacturing efficiency is improved, but moisture infiltration paths are created at exposed portions
Solution Approach 1:
The integral connector molding is designed with the receiving portion nested inside the connector portion, ensuring that the primary molded body (connection pins) is fully contained within the sealed environment. This maintains the manufacturing efficiency benefits of integral molding while eliminating exposure to external moisture and humidity.
Solution Approach 2:
A seal member is incorporated into the integral connector molding structure to create a protective barrier. This sealing element prevents moisture and humidity from infiltrating through the connection pins and other internal components, while maintaining the integrated manufacturing process.
Data Source
AI summary
Airtightness of a connector molding is improved. There is provided a connector molding in which a conductor and a fixing member are integrally molded with a molded body including a connector portion. The conductor is fixed to the fixing member, and is integrally molded with the molded body in a state in which an external connection end portion protrudes into a space within the connector portion. A part of the fixing member is exposed to the space within the connector portion and the remaining portion is covered by the molded body, or the entire fixing member is covered by the molded body.