Electrical Connection Box Hinge Ribs to Prevent Mounting Shake
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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 mounting operations and increasing labor and component parts when fixed with screws.
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 fixation screws.
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 facilitate mounting operation and accommodate dimensional irregularities, then the mounting operation becomes easier, but a relative shaking movement develops between the two components
Solution Approach 1:
The invention introduces ribs that extend in directions intersecting the rotational axis of the shaft portion. These ribs add a new dimensional constraint (radial direction) to the existing rotational degree of freedom, thereby preventing shaking movements while preserving the clearance for easy mounting operations.
Solution Approach 2:
The invention applies local reinforcement through ribs at specific locations on the shaft portion and shaft receiving portion. These ribs are strategically positioned to intersect, creating localized constraint zones that prevent shaking movements only where necessary, while maintaining overall clearance and ease of mounting.
2Stability of the object's composition
If the electronic control unit is attached to the body by screws after attachment to prevent shaking movement, 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 invention merges the shaking prevention function into the hinge structure itself by incorporating ribs on the shaft portion and shaft receiving portion. This eliminates the need for separate screw fasteners, as the intersecting ribs provide inherent shaking prevention while maintaining the simplicity of the hinge attachment mechanism.
Solution Approach 2:
The hinge structure serves dual purposes: it enables easy rotational attachment and simultaneously prevents shaking movements through its built-in rib structure. The system is self-sufficient, requiring no additional components or steps for shaking prevention.
3Stability of the object's composition
If the electronic control unit is attached to the body by screws after attachment to prevent shaking movement, then the shaking movement is prevented, but the time and labor required for the attaching operation increase
Solution Approach 1:
The invention combines the attachment and shaking prevention functions into a single hinge-based operation. The intersecting ribs are integrated into the hinge structure, allowing both functions to be achieved simultaneously in one attachment motion, thereby eliminating the additional time required for screw fastening.
4Ease of operation
If a larger clearance is provided to facilitate the mounting operation in rotational attachment, then the mounting operation becomes easier, but the shaking movement becomes larger
Solution Approach 1:
The invention adds rib structures that extend in directions intersecting the rotational axis, creating constraints in the radial direction. This dimensional addition allows the clearance to be maintained for ease of mounting while the intersecting ribs prevent excessive shaking movements by providing radial stability.
Solution Approach 2:
The intersecting ribs create localized constraint zones at critical positions where shaking movements would be most pronounced. This local reinforcement allows larger overall clearance to be maintained while preventing shaking at the specific locations where the ribs intersect.
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
This design enables easy attachment of the mounting member to the body while preventing relative shaking, allowing for a larger clearance that enhances the efficiency of the mounting operation and reduces the complexity and time required for assembly.
Implementation Method 1
a shaft portion (72) formed at one end of the rotation portion (7)
Implementation Method 2
when the mounting member is attached to the body, the first rib abuts against the other of the shaft portion (72) and the shaft receiving portion (6)
Data Source
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.