Cushion Clip Bulged Portion Absorbs Impact Noise
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Solution Overview
Problem
Existing cushion clips generate noise due to contact between the hard resinous engagement portion and the door frame when subjected to vehicle vibrations, and they fail to effectively absorb impact without producing noise.
Innovation Solution
A cushion clip with a support portion made of hard material and a cushioning portion made of soft material, integrated by two-color molding, featuring a bulged portion that elastically contacts the door panel to prevent noise and absorb impact, while the support portion is designed to avoid contact with the door frame during impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the engagement portion is made of hard resinous material to provide rigidity and structural support, then the structural strength is improved, but noise is generated when the engagement portion contacts the door frame during vibration
Solution Approach 1:
The cushion clip is divided into two distinct material zones: a hard resinous engagement portion for structural support and a soft elastomeric cushioning portion for noise reduction. This segmentation allows each part to perform its specific function without compromising the other.
Solution Approach 2:
Different parts of the cushion clip have different material properties - the engagement portion uses hard resin for rigidity while the cushioning portion uses elastomeric material for elasticity and noise dampening. This local quality differentiation resolves the contradiction between strength and noise generation.
2Loss of energy
If the cushioning portion is made of elastomeric material to absorb impact, then the impact absorption capability is improved, but the engagement portion may contact the door frame causing noise during vibration
Solution Approach 1:
The soft elastomeric cushioning portion acts as an intermediary between the hard engagement portion and the door frame. During vibration, this intermediate layer prevents direct contact between the hard engagement portion and the door frame, thereby eliminating noise while maintaining impact absorption capabilities.
3Reliability
If the support portion is designed to be inserted into the attachment hole for secure mounting, then the mounting reliability is improved, but the support portion contacts the door frame during impact causing noise
Solution Approach 1:
The soft cushioning portion is positioned to contact the door frame before the hard engagement portion can contact it during impact. This prior cushioning prevents the hard portion from contacting the door frame, thereby preventing noise generation while maintaining secure mounting through the engagement portion.
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 cushion clip effectively absorbs impact without generating noise by ensuring the bulged portion of the cushioning portion elastically contacts the door panel, preventing the support portion from contacting the door frame, thus eliminating noise production.
Implementation Method 1
a cushioning portion made of a soft material and integrally connected to the support member by two-color molding... the cushioning portion is configured to project from the first member when the support portion is connected to the attachment hole, so as to elastically absorb impact from a second member
Implementation Method 2
the base portion of the cushioning portion has a bulged portion that is formed in at least a portion thereof so as to extend along the columnar portion, the bulged portion being shaped to project beyond the shoulder surface in the insertion direction of the support portion, so as to elastically contact the first member to prevent the shoulder surface from contacting the first member when the cushion clip is applied with the impact from the second member
Data Source
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AI summary
A cushion clip (1) may include a support portion (10) capable of being connected to an attachment hole (H1) formed in a first member (D1) and a cushioning portion (20) integrally connected to the support member (10). The support portion (10) has an engagement portion (12) and a head portion (11). The head portion (11) has a shoulder surface (11A) that is formed in a columnar portion (11B) thereof. The cushioning portion (20) has a base portion (21) that is positioned to surround the head portion (11). The base portion (21) of the cushioning portion (20) has a bulged portion (21A) that is formed therein. The bulged portion (21A) is shaped to project beyond the shoulder surface (11A) in an insertion direction (R) of the support portion (10), so as to elastically contact the first member (D1) when the cushion clip (1) is applied with the impact from a second member (F1).