Battery Cover Flat Contact Portion for Stable Locking
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Solution Overview
Problem
Existing battery covers fail to stably maintain the opening state of the opening/closing part due to the locking projection sliding along a curved contact portion, which can prevent engagement between the locking projection and recess.
Innovation Solution
A battery cover design featuring a flat contact portion that abuts the locking projection first, with an inclined contact tapered portion and a projecting tapered portion to guide the locking projection, ensuring stable deflection and engagement between the locking projection and recess.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a curved contact portion is used to abut on the locking projection, then the locking projection can slide along the curved surface, but the locking projection and locking recess may not engage properly and the opening state cannot be maintained
Solution Approach 1:
The contact portion is segmented into two distinct functional zones: a flat portion for initial contact and deflection, and a contact tapered portion for sliding and engagement. This segmentation allows each portion to perform its specific function optimally without interfering with the other, resolving the contradiction between sliding action and engagement stability.
Solution Approach 2:
Different portions of the contact surface have different geometric properties tailored to their specific functions. The flat portion provides a stable contact area for deflection, while the contact tapered portion provides a sloped surface for guiding the locking projection into engagement. This local differentiation of quality ensures both sliding and engagement occur reliably.
2Ease of operation
If the contact portion is formed in a curved shape, then the locking projection can slide, but the opening state of the opening/closing part cannot be stably maintained
Solution Approach 1:
The contact portion is divided into a flat portion for deflection and a contact tapered portion for engagement. This segmentation ensures that the deflection action (ease of operation) and engagement stability (opening state maintenance) occur in sequence without compromising either function.
Solution Approach 2:
The flat portion performs the preliminary action of deflecting the locking projection before the contact tapered portion engages it with the locking recess. This preliminary deflection action prepares the locking projection for proper engagement, ensuring both ease of operation and stable maintenance of the opening state.
3Reliability
If a flat portion extending orthogonal to the force input direction is provided on the contact portion, then the locking projection is deflected reliably, but the structure becomes more complex
Solution Approach 1:
The flat portion and contact tapered portion are merged into a single integrated contact portion structure. This combination achieves reliable deflection (through the flat portion) and proper engagement (through the contact tapered portion) without requiring separate components, thus maintaining reliability while avoiding excessive structural complexity.
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 design reliably maintains the opening state of the opening/closing part by suppressing sliding and ensuring consistent engagement between the locking projection and recess, enhancing the battery cover's functionality.
Implementation Method 1
a flexible rib provided on the opening/closing part to be deflectable which has a locking projection
Data Source
AI summary
A battery cover including a main body, an opening/closing part provided on the main body, a flexible rib having a locking projection provided on the opening/closing part, an abutting rib provided on the main body, which has a locking recess to be engaged with the locking projection while the opening/closing part is opened to the main body, a contact portion that abuts on the locking projection and deflects the flexible rib when the opening/closing part is opened to the main body, and a flat portion provided on the contact portion, which abuts on the locking projection first when the opening/closing part is opened to the main body and extends in the direction orthogonal to the direction of force input when abutting on the locking projection.