Pipe Harness Internal Seal Fixing Without Separate Retainers
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Solution Overview
Problem
Conventional pipe harnesses require additional parts like rubber stoppers and retainers for sealing, increasing complexity and cost due to the need for separate members to fix the sealing structure.
Innovation Solution
A pipe harness design that integrates a position fixing portion within the pipe to secure the sealing portion, eliminating the need for external retainers by using protruding portions or recesses to maintain the sealing integrity without additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rubber stopper is attached to the pipe to ensure sealing, then sealing performance is improved, but the number of parts increases and cost increases due to the need for separate retaining members
Solution Approach 1:
The patent combines the sealing portion and the retaining function into a single integrated seal structure. The seal includes an elastic body with a sealing surface that contacts the pipe's inner peripheral surface, eliminating the need for separate rubber stoppers and retainers. This merging of functions reduces the number of parts while maintaining reliable sealing performance.
Solution Approach 2:
The seal structure serves multiple functions simultaneously: it provides sealing through the sealing surface contact with the pipe, retains the positioning through the elastic body's deformation capability, and prevents water intrusion. This multi-functional design eliminates the need for separate dedicated components for each function.
2Reliability
If a separate rubber stopper retainer is used to fix the rubber stopper to the pipe, then the rubber stopper is securely fixed, but the structure becomes more complex and costly
Solution Approach 1:
The patent integrates the fixation function directly into the seal structure. The elastic body of the seal deforms to engage with the pipe's inner peripheral surface, providing secure fixation without requiring separate retainers. This combines the sealing and fixation functions into a single component.
Solution Approach 2:
The seal structure is self-fixing through the elastic deformation of its body. When installed, the elastic body naturally deforms to contact and adhere to the pipe's inner surface, providing its own retention mechanism without needing external fixing components.
Data Source
AI summary
A pipe harness including an electric wire; a pipe through which the electric wire is inserted; a seal through which the electric wire is inserted, the seal being configured to ensure sealing of an interior of the pipe by being attached inside the pipe; and a position fixing portion that is provided on at least a pipe opening side of the seal out of two sides of the seal in a thickness direction of the seal when the seal is attached in the pipe, the position fixing portion being configured to fix the seal at an attachment position.