Retractable Vehicle Door Handle Vertical Link Mechanism
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Solution Overview
Problem
Conventional retractable outside door handle assemblies for vehicles suffer from increased weight, cost, and compromised exterior aesthetics due to the need for long link mechanisms to achieve adequate protrusion length for user convenience, which also affect running performance and noise.
Innovation Solution
A retractable outside door handle assembly with a vertically short layout and a guide mechanism that allows the outside door handle to be linearly protruded and received, utilizing a combination of links, an actuator, and a return spring to improve operation reliability and connectivity with the door latch, while reducing weight and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the outside door handle is installed to be protruded outside along the width direction of the vehicle, then operation convenience of the passenger is improved, but exterior beauty of the vehicle deteriorates and running noise increases
Solution Approach 1:
The door handle is designed to be dynamically adjustable between protruded and retracted positions. An actuator mechanism enables the handle to extend outward when needed for operation and retract into the door panel for aesthetic purposes, transforming a static structure into a dynamic one that adapts to different functional requirements.
Solution Approach 2:
The door handle assembly is nested within the door panel structure. When retracted, the handle fits into a receiving hole or cavity in the door panel, creating a flush surface. This nesting approach allows the handle to be stored within the door body when not in use, eliminating its visual impact and aerodynamic drag.
2Ease of operation
If the length of the four-node links is increased to elongate the protruding length of the outside door handle, then operation convenience is improved, but weight and cost increase
Solution Approach 1:
Instead of achieving the required protruding length through horizontal extension of long links, the mechanism utilizes vertical space by arranging links in a folded or articulated configuration. The moving block travels vertically within a compact space, and through the geometric arrangement of links, achieves sufficient horizontal protrusion without requiring long individual link components.
Solution Approach 2:
The link mechanism is divided into multiple shorter link segments (first link, second link, third link) connected in series through pin shafts. This segmentation allows the mechanism to achieve the required range of motion and protrusion distance through the cumulative effect of multiple small movements rather than requiring a single long link, reducing overall weight and complexity.
3Adaptability or versatility
If the four-node link mechanism is used to retract the outside door handle, then the door handle can be received inside the door outer panel, but the structure complexity increases
Solution Approach 1:
The door handle mechanism is designed to be self-servicing through the use of a return spring that automatically returns the handle to its retracted position when the actuator releases it. The spring stores energy during the protrusion phase and releases it during retraction, eliminating the need for additional motors or complex control systems for the return motion.
Solution Approach 2:
The moving block serves multiple functions: it acts as the actuator for the door handle, the pivot point for the link mechanism, and the guide for the door handle's linear motion. By making this single component multi-functional, the design reduces the total number of parts and simplifies the overall structure while maintaining the retractable capability.
Data Source
AI summary
A retractable outside door handle assembly for a vehicle according to an exemplary embodiment of the present invention may include an outside door handle protruded outward in a width direction of a vehicle rather than a door outer panel configuring a door of the vehicle or being receivable to an opening formed at the door outer panel. A first link has one end connected to one end of the outside door handle and the other end extending downward along a height direction of the vehicle. A second link has one end connected to one side and the other side of the outside door handle and the other end extending along the height direction of the vehicle. A main arm has one end rotatably connected to the door outer panel and the other end connected to the second link.