Vehicle Door Fixing Device Arched Connecting Portion
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Solution Overview
Problem
Conventional vehicle door fixing devices require larger areas for installation due to the shape differences between vehicle body and door panels, limiting their usability across various vehicle types, especially in smaller vehicles.
Innovation Solution
A fixing device with a door lock striker and movable member featuring inclined surfaces and a connecting portion with an arched shape, allowing for reduced installation area by minimizing interference with protruding portions, and utilizing a torsion coil spring for urging the movable member, enabling wider compatibility across different vehicle types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the movement range of the movable member is set relatively rearward to restrain interference between the connecting portion and the protruding portions, then interference is prevented, but the area necessary for installing the movable member is enlarged
Solution Approach 1:
The connecting portion is designed with an arched shape that protrudes in the direction in which the leg portion is projected. This curved configuration allows the connecting portion to clear the protruding portions (fixing portion and guide portion) at the basal end portion of the leg portion during forward movement, enabling the movable member to be positioned more forward while preventing interference.
2Adaptability or versatility
If the area necessary for installing members is reduced to widen usability in smaller vehicles, then adaptability is improved, but the movement range of the movable member is constrained
Solution Approach 1:
The arched shape of the connecting portion enables the movable member to achieve a more forward position while maintaining sufficient movement range. The curvature allows the connecting portion to navigate around the protruding portions during operation, effectively increasing the available movement range within a reduced installation area.
3Area of stationary object
If the movable member is moved forward to reduce installation area, then installation area is reduced, but interference with protruding portions may occur
Solution Approach 1:
The arched configuration of the connecting portion creates a clearance path that allows the movable member to move forward without the connecting portion contacting the protruding portions. The curvature is specifically designed to clear both the fixing portion and guide portion at the basal end of the leg portion throughout the movement range.
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 solution reduces the necessary installation area for the movable member, enhancing the device's usability in a broader range of vehicles by minimizing interference and maintaining effective backlash restraint of the vehicle door.
Implementation Method 1
utilizing a torsion coil spring for urging the movable member
Implementation Method 2
utilizing a torsion coil spring for urging the movable member
Data Source
AI summary
A fixing device for vehicle doors includes a door lock striker, a fixed member, and a movable member. The fixed member has two inclined surfaces that are movable relative to the door lock striker and located on opposite sides of the door lock striker. The movable member has two inclined surfaces arranged on opposite sides of the door lock striker and is urged such that each inclined surface is pushed against the corresponding inclined surface of the fixed member. The door lock striker includes a leg portion. The movable member includes two bodies forming the two inclined surfaces of the movable member, and a connecting portion that connects the bodies at the rear end portions of the bodies, which are pressed towards the fixed member and moved rearward. The connecting portion has an arched shape that protrudes in the protruding direction of the leg portion.