Motor Vehicle Door Handle Parallel Extension Mechanism
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Solution Overview
Problem
Existing motor vehicle door handle systems fail to provide a stable and efficient mechanism for absorbing compressive forces and transmitting them to the door, while also allowing for a smooth, parallel movement and intuitive opening mechanism.
Innovation Solution
A handle device with a motor-operated pivot lever, push rod, and locking lever system that rotates the door handle outward, allowing compressive forces to be absorbed and transmitted to the door, and enables a pivot movement for opening, using a cam disc drive and toggle lever arrangement to maintain a parallel appearance and ensure force transmission without torque.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the door handle is tilted outwards along an axis forming a protruding wing, then the door handle can be extended, but the movement is not steady and parallel-seeming
Solution Approach 1:
The patent employs a motor-operated pivot lever that dynamically adjusts the door handle position through controlled rotation, transitioning from a static tilted design to a dynamic parallel extension mechanism. The pivot lever rotates about a fixed axis to achieve steady, parallel-seeming movement while maintaining structural stability throughout the transition.
2Device complexity
If a simple structural means is used for door handle extension, then the device complexity is reduced, but the ability to absorb and transmit compressive forces is insufficient
Solution Approach 1:
The door handle system is segmented into distinct functional components: a pivot lever for position adjustment, a locking lever for force transmission, and a cam disc drive for actuation. This segmentation allows each component to specialize in its function, with the locking lever specifically designed to absorb and transmit compressive forces through its engagement with the door structure.
3Ease of operation
If the door handle is rotated about the front hinge point, then a natural force flow is ensured, but the mechanism becomes more complex
Solution Approach 1:
The front hinge point serves multiple functions: it acts as the rotation axis for the pivot lever, provides a natural force flow path perpendicular to the door axis during opening, and serves as a mounting point for the cam disc drive. This multi-functionality reduces the need for additional components while maintaining operational naturalness.
4Device complexity
If a cam disc drive is used for rotating the pivot lever, then the drive mechanism is structurally simple, but the reliability may be compromised
Solution Approach 1:
The cam disc drive incorporates a toothed cam profile that provides mechanical feedback through engagement with the pivot lever. The toothed engagement ensures precise positioning and prevents back-driving, while the cam geometry automatically reverses the drive direction when returning to the retracted position, providing inherent reliability without complex control systems.
Data Source
AI summary
A handle device for a motor vehicle door includes a door handle, which is hinged at both ends to an electrically driven movement kinematic system. A first end of the door handle is rotatable outwards via a motor-operated pivot lever. A push rod is hinged to the pivot lever, the other end of which is hinged to a locking lever, which acts on a toggle lever pair. One end of a first toggle lever is mounted on the housing side and one end of a second toggle lever is hinged to a second end of the door handle. The locking lever is designed, in a standby position, to block a movement of the door handle back into a rest position and to permit a movement into an opening position.