Electrical Connection Box Shaft Rib Anti-Shake Mechanism
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Solution Overview
Problem
Existing electrical connection boxes with a separate electronic control unit and body experience relative shaking movements due to increased clearance, complicating the mounting operation and requiring additional components and labor for secure attachment.
Innovation Solution
The electrical connection box features a shaft portion on the mounting member and a shaft receiving portion on the body with intersecting ribs that engage when attached, allowing easy rotation and preventing shaking movements by abutting ribs, eliminating the need for precise positioning and additional fixing components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a predetermined clearance is formed between the electronic control unit and the body to accommodate dimensional irregularities, then the mounting operation becomes easier, but a relative shaking movement develops between the two components
Solution Approach 1:
The rib structure is designed in advance to prevent the harmful shaking movement before it occurs. The ribs extend from the housing toward the control unit housing, creating preliminary mechanical interference that stops relative movement between the two components while still allowing the mounting operation to proceed with the necessary clearance.
2Ease of operation
If the electronic control unit is rotatably moved about the hinge to mount onto the body, then the attachment becomes easier with less time and labor, but a larger clearance must be provided which increases the shaking movement
Solution Approach 1:
The rib structure is pre-configured to counteract the increased shaking movement that results from the rotational mounting method. The ribs create mechanical interference that prevents excessive movement while allowing the control unit to be rotatably mounted with the necessary clearance for easy attachment.
Solution Approach 2:
The hinge mechanism combines rotational movement capability with the rib structure that provides stability. This composite approach allows the system to benefit from both the ease of rotational attachment and the stability provided by the rib interference fit.
3Stability of the object's composition
If screws are used to fix the electronic control unit and body together after attachment, then the shaking movement is prevented, but the number of component parts and the time and labor required for the attaching operation increase
Solution Approach 1:
The rib structure extracts the stabilizing function from the mounting mechanism, eliminating the need for separate screws or additional fixing components. The ribs themselves provide the necessary stability and shaking movement prevention that would otherwise require additional parts.
Solution Approach 2:
The stabilizing function is merged into the existing rib structure of the housing and control unit housing. Instead of adding separate fixing components, the ribs are integrated into the mounting mechanism itself, providing both structural support and movement prevention.
4Stability of the object's composition
If screws are used to fix the electronic control unit and body together, then the shaking movement is prevented, but the time and labor required for the attaching operation increase
Solution Approach 1:
The time-consuming screw fastening operation is replaced by the integrated rib structure that provides stability as part of the mounting process itself. The ribs prevent shaking movement without requiring additional time for separate fixing operations.
Data Source
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AI summary
An electrical connection box includes: a body; a mounting member which is attached to the body; a shaft portion which is provided on the mounting member; and a shaft receiving portion which is provided on the body and receives the shaft portion rotatably. A first rib is formed on one of the shaft portion and the shaft receiving portion. When the mounting member is attached to the body, the first rib abuts against the other of the shaft portion and the shaft receiving portion.