Vehicle Door Handle Conical Taper Clipping Mechanism
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Solution Overview
Problem
Current clipping systems for attaching decorative frames to vehicle door handles suffer from clearance and tolerance issues, leading to aesthetic and functional problems, especially under load, and are not suitable for high-quality metallic or painted parts due to visibility and potential deformation or damage during assembly.
Innovation Solution
The design incorporates a conical taper between the lever and frame with clipping points and guide zones, ensuring a secure, aesthetically pleasing connection by minimizing clearance and allowing for easy assembly, while maintaining flexibility and preventing lateral detachment, with the option for different surface finishes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If clipping systems are used to join the decorative frame to the lever, then assembly is simple and economical, but clearance and tolerance issues cause aesthetic problems and the coupling becomes visible
Solution Approach 1:
A conical intermediary surface is introduced between the decorative frame and the lever. This conical surface acts as a mediator that absorbs clearance and tolerance variations, providing a precise fitting interface that eliminates visible gaps while maintaining the simplicity of clipping assembly.
Solution Approach 2:
The coupling interface geometry is changed from a traditional cylindrical or flat interface to a conical interface. This parameter change in the geometric shape allows the coupling to self-adjust to clearance and tolerance variations, ensuring consistent aesthetic appearance across all assembled units.
2Shape
If the decorative frame is chrome-plated, then aesthetic appearance is improved, but the loss of elasticity through metallisation reduces the effectiveness of the coupling under load
Solution Approach 1:
The conical coupling surface is designed to establish preliminary contact and distribution of loads before the chrome-plated surface is subjected to stress. This preliminary action through the conical geometry protects the metallised surface from direct mechanical stress, preserving both aesthetics and coupling effectiveness.
3Ease of manufacture
If clipping elements are used to join the frame and lever, then assembly is economical, but the coupling elements must be concealed which complicates the design
Solution Approach 1:
The clipping elements and the conical coupling surface are merged into a single integrated solution. The conical surface provides both the aesthetic flush fit and the mechanical coupling function, eliminating the need for separate concealed clipping elements and simplifying the overall design.
Data Source
Figure 1~2
Figure 3~4B
Figure 5~6
AI summary
Interior handle for opening the door of a vehicle, hinged according to the vertical axis of rotation, in relation to a housing (1) built into the vehicle door. The handle comprises a lever (2) with a perimeter partition (4) perpendicular to the vertical plane, and an outer (5) frame that, in turn, has a perimeter partition (6) that exteriorally surrounds the lever (2). The outer contour of the lever (2) has a perimeter rim (7), on its face side, with an outer tapered wall (8) and the outer contour of the frame (5) has a perimeter groove (9), on its face side, with a tapered inner wall (10). The cone taper of said inner wall (10) of the frame (5) coincides with the cone taper of the outer wall (8) of the lever (2). The contour of the lever and frame have clipping points (11) and guide zones (12), arranged alternately.