Grommet With Elastic Handle For Panel Insertion
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Solution Overview
Problem
Conventional grommets have low workability due to the need to push the peripheral attachment portion into a through hole of a panel, making attachment difficult and inefficient.
Innovation Solution
A grommet with a ring-shaped water stop portion, a closing portion, a tube portion for wire insertion, and an arch-shaped handle portion that is elastically deformable, allowing for improved attachment by pulling the handle portion to insert the water stop portion uniformly into the through hole.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the attachment portion is pushed into the through hole for attachment, then the grommet can be mounted on the panel, but the workability is low and attachment becomes difficult
Solution Approach 1:
Instead of pushing the attachment portion into the through hole as in conventional grommets, this invention inverts the attachment method by having the water stop portion inserted into the through hole while the attachment portion remains outside and attaches to the outer surface of the panel. This reversal of the attachment sequence dramatically improves workability and eliminates the difficulty of forcing the attachment portion into the hole.
Solution Approach 2:
The grommet is divided into distinct functional portions: the water stop portion that inserts into the through hole, the closing portion that seals the hole, and the attachment portion that attaches to the panel outer surface. This segmentation allows each portion to perform its function independently, with the water stop portion being inserted first and the attachment portion being secured afterward, greatly improving attachment ease.
2Reliability
If the peripheral part of the attachment portion is pushed into the through hole, then the grommet can be attached, but abnormal noise may occur and reliability is reduced
Solution Approach 1:
By inverting the attachment method so that the water stop portion inserts into the through hole first and the attachment portion attaches to the outer surface, the invention prevents the attachment portion from being forced into the hole. This eliminates the source of abnormal noise and improves reliability by ensuring proper sealing without deformation.
3Productivity
If a conventional grommet structure is used, then the wire harness can be routed, but the attachment process is time-consuming and productivity is low
Solution Approach 1:
The inverted attachment method allows the water stop portion to be inserted into the through hole first, followed by attaching the attachment portion to the panel outer surface. This sequence is much faster and easier than pushing the entire attachment portion into the hole, significantly reducing attachment time and improving productivity.
Solution Approach 2:
The water stop portion is designed to be inserted into the through hole before the attachment portion is secured to the panel. This preliminary action of inserting the sealing portion first simplifies the overall attachment process and reduces the time required for complete installation.
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
Enhances workability in attaching the grommet and wire harness to the panel by enabling easier insertion and reducing the risk of abnormal noise through elastic deformation, thus improving the overall attachment process.
Implementation Method 1
the handle portion is provided to be elastically deformable at least in the axis direction of the water stop portion
Data Source
AI summary
A grommet includes a ring-shaped water stop portion inserted into a through hole formed in an attachment panel and performing water stopping, a closing portion projecting toward radial inside of the water stop portion and closing a ring shape of the water stop portion, a tube portion extending in a direction crossing an axis direction of the water stop portion and provided to penetrate the closing portion and through which a wire material is inserted, and a handle portion provided in an arch shape with respect to the closing portion with a central axis of the water stop portion serving as a center.