Snap Fit Dial Locking System for Instrument Clusters
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Solution Overview
Problem
The existing dial locking system requires significant time for assembly due to the use of screws, which reduces production rate and increases costs, and makes reusing components difficult.
Innovation Solution
A dial locking system that uses a snap fit mechanism at the central axis and circumference, allowing the dial to be locked with the compartment by aligning pinches with slots and rotating the dial in a counter-clockwise direction to engage bulged profiles, eliminating the need for screws and simplifying assembly and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If screws are used to assemble the dial with the compartment, then the connection strength is improved, but the assembly time increases and production rate decreases
Solution Approach 1:
The patent removes the screw fastening mechanism from the dial assembly and replaces it with a snap-fit mechanism integrated into the dial structure. The dial includes circumferential lugs that engage with corresponding slots in the compartment, eliminating the need for separate screw fasteners and enabling tool-free assembly.
Solution Approach 2:
The patent combines the dial structure with integrated locking lugs that form part of the dial body itself. These lugs are molded as integral features of the dial, merging the fastening function into the dial structure and eliminating the need for separate fastening components.
2Reliability
If screws are used to assemble the dial with the compartment, then the connection reliability is improved, but the device complexity increases
Solution Approach 1:
The patent eliminates screws and separate fastening components from the assembly, replacing them with an integrated snap-fit mechanism where circumferential lugs on the dial engage directly with slots in the compartment, simplifying the overall device structure.
Solution Approach 2:
The dial structure includes self-aligning circumferential lugs that automatically engage with the compartment slots during assembly. The design provides self-positioning features that guide the dial into the correct orientation without requiring external alignment tools or complex assembly procedures.
3Strength
If screws are used to assemble the dial with the compartment, then the connection strength is improved, but the ease of manufacture decreases
Solution Approach 1:
The patent removes the need for screw fasteners and separate fastening components, replacing them with an integrated snap-fit mechanism where circumferential lugs on the dial engage directly with slots in the compartment, simplifying the overall device structure.
Solution Approach 2:
The patent transitions from a mechanical fastening system requiring multiple components to a molded snap-fit system where the dial is designed with integrated circumferential lugs that engage with compartment slots, changing the connection mechanism from threaded to elastic deformation-based locking.
4Reliability
If screws are used to assemble the dial with the compartment, then the connection reliability is improved, but the productivity decreases
Solution Approach 1:
The patent eliminates screws and separate fastening components from the assembly, replacing them with an integrated snap-fit mechanism where circumferential lugs on the dial engage directly with slots in the compartment, simplifying the overall device structure.
Solution Approach 2:
The dial structure includes self-aligning circumferential lugs that automatically engage with the compartment slots during assembly. The design provides self-positioning features that guide the dial into the correct orientation without requiring external alignment tools or complex assembly procedures.
Data Source
AI summary
The present invention relates to a dial locking system. More particularly related to, the dial (100) having dial pinches (101, 102) at center and dial locking profile (106) at periphery. The compartment (200) has a central axis (7) with slots (201, 202) and resting profile (205) to accommodate the dial locking profile (106) for locking at periphery. The bulged profiles (203, 204) at the slots (201, 202) of the compartment (200) faced downwards for locking at center by the dial pinches (101,102). The time required to assemble the dial (100) with compartment (200) is reduced which in turn increases the production rate.