Resin Bracket Junction Structure With Multi-Directional Press-Fitting
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Solution Overview
Problem
Conventional resin bracket junction structures face challenges in securing sufficient joining strength and preventing looseness due to the need for high forces during press-fitting, which can result in inclined fitting and potential damage, and the formation of oblique guide surfaces compromises contact area and strength.
Innovation Solution
A member junction structure with specific press-fitting and press-fitted portions that allow for guided installation and interference-fitting in multiple directions, ensuring sufficient temporary press-fitting and enhanced joining strength without requiring excessive force or oblique guide surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If press-fitting is performed to increase joining strength between resin brackets, then joining strength is improved, but large force is required making it difficult to perform by hand
Solution Approach 1:
The press-fitting portions are divided into multiple segments (first press-fitting portion and second press-fitting portion) that are fitted into corresponding press-fitted portions at different locations. This segmentation allows the joining force to be distributed across multiple contact points, reducing the peak force required at any single point and enabling manual operation while maintaining overall joining strength.
2Ease of operation
If oblique deep guide surface is formed to secure sufficient press-fitting amount, then temporary press-fitting is facilitated, but contact surface area becomes small reducing joining strength
Solution Approach 1:
Instead of relying solely on the depth of the guide surface in the insertion direction, the invention introduces multiple press-fitting portions distributed in different spatial locations and directions. This multi-dimensional arrangement provides both the guidance function during insertion and sufficient contact surface area for strong joining, resolving the trade-off between ease of operation and joining strength.
3Strength
If multiple press-fitting portions are used to increase contact area, then joining strength is improved, but device complexity increases
Solution Approach 1:
Multiple press-fitting portions and their corresponding press-fitted portions are integrated into a single unified structure where the first and second press-fitting portions work together with their respective press-fitted portions. This merging approach achieves enhanced joining strength through multiple contact points while avoiding the complexity of separate, independent joining mechanisms.
Data Source
AI summary
A member junction structure includes a first member provided with a first press-fitting portion and a second press-fitting portion, and a second member provided with a first press-fitted portion and a second press-fitted portion and configured to be installed on the first member by moving in a first direction which is a predetermined one direction with respect to the first member. In a state where the second member is halfway to be installed on the first member, the first press-fitting portion is inserted into the second press-fitted portion, thereby providing a guide for installing the second member on the first member. In a state where the second member is completely installed on the first member, the first press-fitting portion is press-fitted into the first press-fitted portion, and the second press-fitting portion is press-fitted into the second press-fitted portion.