Electronic Key Decorating Member Restriction Section
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Solution Overview
Problem
Conventional electronic keys for vehicles face issues with decorating members falling during battery exchange due to unsecured tolerance in disassembly, leading to potential loss and increased dimensions for securing strength.
Innovation Solution
An electronic key design featuring a decorating member with a restriction section between the casing body and lid, which engages perpendicularly to the fitting direction, preventing release and rotation, ensuring the member remains fixed in three axial directions even when disassembled for battery exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the decorating member is merely put between the casing body and the lid, then the decorating member can be easily attached, but the tolerance in disassembling direction is not secured and the casing body and lid may be disassembled when force is applied in twist direction
Solution Approach 1:
The patent introduces a restriction section that extends in a direction perpendicular to the fitting direction, creating a two-dimensional fixation system. The restriction section has a first extending section and a second extending section that together form an L-shaped or U-shaped structure, preventing disassembly in multiple directions simultaneously while maintaining simple attachment.
2Strength
If the fixing part of the decorating member is made large to secure strength, then the decorating member can be firmly fixed, but the dimensions of the casing body and lid need to be increased
Solution Approach 1:
The restriction section is strategically positioned at a location away from the fitting plane position, specifically at a position where it can effectively prevent disassembly without requiring large dimensions. The restriction section is integrated into the decorating member at a specific location (e.g., at the end of the fixing part or at a position offset from it) to provide maximum restraint with minimal space consumption.
3Ease of repair
If the casing body and lid are disassembled to exchange the battery, then the battery can be replaced, but the decorating member may fall and may be lost
Solution Approach 1:
The restriction section is designed to dynamically adapt to the assembly state. When the lid is fitted to the casing body, the restriction section is held between them, maintaining engagement. When the lid is removed for battery exchange, the restriction section remains engaged with the casing body through its L-shaped or U-shaped configuration, ensuring the decorating member does not fall even during the disassembled state.
Data Source
AI summary
An electronic key for a vehicle includes a casing body, a lid, and a decorating member. The decorating member has a fixing part held between the casing body and the lid. The decorating member and one of the casing body and the lid have a restriction section at a position away from a fitting plane position of the casing body and the lid in a fitting direction. The restriction section becomes an engagement state when a force is applied in an engagement direction that crosses the fitting direction and the restriction section restricts release of the engagement state when a force is applied in an engagement releasing direction opposite from the engagement direction.