Bumper Fastening Clip with Displacement Control
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Solution Overview
Problem
Conventional bumper fixing clips require excessive operating force for release and are prone to breakage due to excessive displacement of the manual knob during operation.
Innovation Solution
A bumper fixing clip design featuring a rod-like operation portion with a second engagement claw and an abutment piece, where the control portion restricts the moving range of the operation portion to prevent breakage and includes a wall portion to control deformation during external forces, ensuring stable engagement and easy attachment/detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the manual knob is made to be displaceable for releasing the bumper, then the bumper can be released, but a great operating force is required and breakage may occur due to excessive displacement
Solution Approach 1:
The patent changes the mechanical parameters of the operation portion by introducing a control portion that limits the displacement distance of the manual knob. This control portion physically restricts the maximum travel of the knob, preventing excessive displacement that could cause breakage while still allowing sufficient movement for engagement and disengagement operations
Solution Approach 2:
The control portion acts as an intermediary element between the manual knob and the engagement member. It mediates the displacement motion by providing a stop that prevents the knob from moving beyond a safe limit, thereby protecting the engagement member from breakage while maintaining operational functionality
2Ease of operation
If the operation portion is made longer for better operability, then ease of operation improves, but the moving range increases causing potential breakage
Solution Approach 1:
The patent controls the length parameter of the operation portion by introducing a control portion that acts as a physical stop. This limits the maximum displacement distance of the manual knob, ensuring that while the knob has sufficient length for easy gripping and operation, its moving range is constrained to prevent breakage of the engagement member
3Reliability
If the engagement member is made more robust to prevent breakage, then reliability improves, but the force required for operation increases
Solution Approach 1:
The patent changes the operational parameters by introducing a control portion that limits the displacement distance of the operation portion. This allows the engagement member to be designed with appropriate strength without requiring excessive operating force, as the controlled movement range prevents mechanical overload and breakage while maintaining ease of operation
Data Source
AI summary
A bumper fixing clip includes a leg portion engaging with a vehicle body panel; engagement claws engaging with a plurality of engagement holes formed on a bumper side; and an engagement member including a second engagement claw engageable with or retractable from one of the engagement holes formed on the bumper side by operating an operation portion, and fixing the bumper to the vehicle body panel. The engagement member is integrally formed with a fixing clip main body, and includes an approximately rod-like operation portion; the second engagement claw formed in a vicinity of a turning center of the operation portion; and an abutment piece formed on a side opposite to the second engagement claw. Also, the fixing clip main body includes a control portion abutting against the abutment piece of the operation portion, and controlling a moving range of the operation portion so as to reduce a force operating the operation portion, and even if an excessive force is applied, the moving range is controlled so as to prevent a breakage.