Offset Inertial Mass in Vehicle Door Locking System
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Solution Overview
Problem
Existing motor vehicle door locking systems with inertial safety systems are not sufficiently responsive during vehicle impacts, as the central zone of the opening deforms more than the periphery, leading to uneven acceleration and reduced effectiveness of the inertial safety system in blocking the opening mechanism.
Innovation Solution
The locking system incorporates a gripping lever with a vertically oriented axis of rotation and an inertia mass positioned longitudinally in front of the axis, allowing the mass to approach the central zone of the opening, combined with a second inertial safety system activated by different shock intensities, ensuring a wide range of use and improved responsiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inertia mass is positioned away from the central zone of the opening, then the structure is simpler and easier to manufacture, but the responsiveness of the inertial safety system during impact is reduced
Solution Approach 1:
The patent repositions the inertia mass along the longitudinal axis of the opening, moving it from a lateral position to a position in front of the gripping element's axis of rotation. This dimensional repositioning places the mass closer to the central zone of the opening, where acceleration during impact is greatest, thereby improving the responsiveness of the inertial safety system without requiring complex lateral adjustments
2Ease of operation
If the gripping lever axis of rotation is positioned behind the gripping element, then the lever arm is longer and easier to actuate, but the inertia mass cannot be positioned close enough to the central zone for effective impact detection
Solution Approach 1:
The patent inverts the conventional arrangement by positioning the axis of rotation of the gripping lever in front of the gripping element rather than behind it. This inversion allows the inertia mass to be positioned in front of the axis of rotation, closer to the central zone of the opening, thereby improving impact detection responsiveness while maintaining adequate lever arm length for actuation
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 system enhances the reactivity of the inertial safety system by positioning the inertia mass closer to the central zone, effectively blocking the opening mechanism during impacts, and provides a wide range of use by activating multiple safety systems in response to varying shock intensities.
Implementation Method 1
an inertial safety system which comprises a balance that carries an inertia mass, the balance being pivotally mounted between a rest position and a locking position in which the rocker prevents rotation of the transmission lever, in the event of impact
Implementation Method 2
The pivoting of the rocker arm is caused by the acceleration force which is applied to the inertial mass in the event of impact against the vehicle
Data Source
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AI summary
The invention relates to a locking system for a motor vehicle opening comprising an opening and a handle 24 which includes a frame 26 which is adapted to be fixed on the opening, a gripping lever 30 which controls the opening of a lock of the opening, a gripping element 32 which is arranged on an external side of the opening and which is designed to allow a user to actuate the gripping lever 30, the gripping element 32 being delimited longitudinally by a front end 42 and a rear end 44, at least a first inertial safety system 28 which is mounted on the frame 26 and which includes a rocker arm 58 which carries an inertial mass 64, characterized in that the inertial mass 64 of the rocker arm 58 is arranged longitudinally in front of the front end 42 of the gripping element 32.