Bracket Holding Electrical Junction Box with Elastic Deformation
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Solution Overview
Problem
Existing brackets for electrical junction boxes face a trade-off between holding force and workability, as increased holding force due to strong support pieces reduces the ease of attachment, leading to rattle displacement issues during vehicle vibration.
Innovation Solution
A bracket design featuring a plate-shaped back surface with inclined holding portions that adjust their inclination and interval during assembly, incorporating a curved shape and elastic materials to enhance holding force while maintaining workability, with main and sub-holding portions strategically positioned to surround the junction box and prevent rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If support pieces are strongly pressed against the electrical junction box to increase holding force, then displacement prevention is improved, but the force required by operator increases and workability is reduced
Solution Approach 1:
The holding portions are designed with elastic deformation capability, allowing them to dynamically adjust their holding force. During assembly, the elastic material deforms to reduce resistance, and after assembly, it maintains strong holding force to prevent displacement, thus resolving the contradiction between ease of operation and holding force
Solution Approach 2:
The patent changes the physical state of the holding portions by using elastic materials that can alter their deformation parameters. The holding portions transition from a deformed state during assembly (easier insertion) to a recovered state after assembly (stronger holding), effectively resolving the contradiction between workability and holding force
2Stability of the object's composition
If holding force is increased to prevent rattle during vibration, then stability is improved, but attachment difficulty increases
Solution Approach 1:
The elastic holding portions provide dynamic adaptation during attachment, initially yielding to reduce complexity of attachment, then maintaining stability under vibration conditions. This dynamic behavior resolves the contradiction between stability and attachment difficulty
Solution Approach 2:
The bracket is designed with pre-formed elastic holding portions that are ready to deform during assembly. This preliminary preparation of the elastic structure allows easy attachment while ensuring subsequent stability, resolving the contradiction between attachment difficulty and stability
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 bracket achieves both strong holding force and easy attachment by adjusting its geometry and material properties, effectively preventing rattle displacement and wear, thus improving the overall attachment process and stability of the electrical junction box.
Implementation Method 1
The plurality of holding portions are configured to have a first inclination relative to the assembly direction before assembly of the electrical junction box, and have a second inclination which is smaller than the first inclination relative to the assembly direction after the assembly of the electrical junction box, or configured to have an elastically changing interval between the holding portions before and after assembly of the electrical junction box
Data Source
AI summary
A bracket configured to hold an electrical junction box includes a plate-shaped back surface portion configured to abut on a back surface of the electrical junction box, and a plurality of holding portions which are erected from the back surface portion along an assembly direction of the electrical junction box. The plurality of holding portions are configured to hold at least two positions on side surfaces of the electrical junction box so as to sandwich the electrical junction box in a direction intersecting the side surfaces. The plurality of holding portions are configured to have a first inclination relative to the assembly direction before assembly of the electrical junction box, and have a second inclination which is smaller than the first inclination relative to the assembly direction after the assembly of the electrical junction box.