Wire Harness Grommet Locking Lid for Branch Sealing
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Solution Overview
Problem
Conventional grommets face difficulties in securely winding tape around the central part of the lid-like unit covering the branch unit of the routing material, leading to potential exposure of the branch unit during routing operations.
Innovation Solution
A grommet design featuring a main body unit and an accommodating unit with a lid-like unit that includes a locking mechanism, allowing the slit to be closed and locked, preventing exposure of the branch unit by eliminating the need for tape winding at the central part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tape winding is performed around the central part of the lid-like unit, then the branch unit can be secured, but it is difficult to wind the tape around the central part
Solution Approach 1:
A rigid rod is introduced as an intermediary tool to enable tape winding around the central part of the lid-like unit. The rod is temporarily inserted through the slit to provide a central axis around which the waterproof tape can be easily wound, solving the difficulty of manual winding while maintaining the waterproof sealing function
2Ease of operation
If the lid-like unit is made openable to accommodate the branch unit, then the branch unit can be inserted, but the central part may slightly open during routing operation exposing the branch unit
Solution Approach 1:
The slit is pre-formed in the lid-like unit to allow easy insertion of the branch unit before final sealing. This preliminary opening structure facilitates accommodation of the branch unit while the subsequent tape winding closes the slit to prevent exposure during routing operations
3Reliability
If the lid-like unit covers the branch unit, then the branch unit is protected, but the central part is difficult to access for tape winding
Solution Approach 1:
The rigid rod serves as a temporary intermediary structure that simplifies the tape winding process. By providing a central axis through the covered branch unit, the rod enables easy tape application without requiring complex winding mechanisms or structures
Data Source
AI summary
A grommet includes: a main body unit into which a routing material can be inserted along an axial direction; and an accommodating unit that protrudes out from one end portion of the main body unit in the axial direction, that formed toward a first branching direction and a second branching direction intersecting with the axial direction and being different from each other, and that accommodates a branch unit of the routing material. The accommodating unit includes a lid-like unit that enables opening and closing of a slit formed from a first opening end to a second opening end and is formed to cover the branch unit in a state where the slit is closed in the accommodated state. The lid-like unit has a locking hole locked to a locking protrusion provided on the main body unit.