Vehicle Door Handle Assembly Noise Reduction via Gasket Compression
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Solution Overview
Problem
Existing vehicle door handles with automatic latches and decorative strips experience noise due to small displacement between the strip and the bowl, which is difficult to prevent without complicating the assembly or increasing costs.
Innovation Solution
A vehicle door handle assembly featuring a peripheral gasket sandwiched between the bowl and door panel, with a strip having hooks that slide into a complementary slot to compress the gasket, ensuring secure positioning and preventing movement, thus eliminating noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If clips are used to fasten the strip to the bowl, then assembly is fast and easy, but the strip can displace relative to the bowl causing friction noise
Solution Approach 1:
The patent introduces a peripheral gasket as an intermediary element between the strip and the bowl. The gasket includes a compression portion that is compressed by the strip to provide friction-based retention, preventing displacement while maintaining ease of assembly. This mediator resolves the contradiction by providing sufficient holding force without requiring complex fastening mechanisms.
Solution Approach 2:
The patent changes the physical state of the gasket material through compression. When the strip is installed, it compresses the peripheral gasket, changing its density and friction characteristics. This compression creates sufficient friction to prevent displacement and noise while maintaining simple assembly. The parameter change in the gasket's physical state resolves the contradiction between easy assembly and noise prevention.
2Object-generated harmful factors
If the contact portion of the strip or bowl is left unpainted, then friction noise is prevented, but additional masking steps are required complicating the assembly
Solution Approach 1:
The peripheral gasket serves as an intermediary that eliminates the need for unpainted contact surfaces. By positioning the gasket between the strip and the bowl, it prevents direct contact between painted surfaces, thereby preventing friction noise while allowing both components to be fully painted. This resolves the contradiction by removing the need for masking steps.
3Object-generated harmful factors
If glue is used to attach the strip to the bowl, then displacement and noise are prevented, but costs increase and application becomes difficult
Solution Approach 1:
The patent replaces the chemical bonding mechanism (glue) with a mechanical retention system. The peripheral gasket uses compression and friction-based retention to prevent displacement, eliminating the need for adhesives. This mechanical solution reduces costs, simplifies assembly, and prevents noise while maintaining effective attachment.
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 solution effectively prevents noise from friction between the strip and bowl by compressing the gasket with hooks, maintaining a streamlined appearance without additional assembly steps or increased costs.
Implementation Method 1
the peripheral gasket is compressed locally by the hook when the hook is slid in the slot in order to prevent movement between the strip and the bowl
Implementation Method 2
the peripheral gasket is made of elastomer material
Implementation Method 3
such small displacement produces friction between the strip and the bowl that may lead to an unpleasant noise for the user
Data Source
Figure 1~6
Figure 2
Figure 3~4
AI summary
The present invention refers to a vehicle door handle assembly (1) comprising: - a bowl (5) configured to be mounted in an opening (7) of a door panel (3), - a peripheral gasket (9) disposed between the bowl (5) and the door panel (3) and configured to be sandwiched between the bowl (5) and the door panel (3) to provide waterproofness, - a strip (11) configured to be fastened to an upper part of the bowl (5), wherein the strip (11) comprises a hook (110) configured to be slid in a complementary slot (50) of the bowl (5) to ensure the vertical positioning of the strip (11) with respect to the bowl (5) when the door handle (1) is assembled to the vehicle and wherein the slot (50) and the peripheral gasket (9) are configured such that the peripheral gasket (9) is compressed locally by the hook (110) when the hook (110) is slid in the slot (50) in order to prevent movement between the strip (11) and the bowl (5)..