Vehicle Door Handle Linkage Without Slotted Guide Complexity
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Solution Overview
Problem
Existing door handle devices for vehicles have complex structures due to the need for slotted guides to facilitate parallel movement of the door handle, which complicates the mechanism and reduces operational simplicity.
Innovation Solution
A door handle device with a handle base, first and second links, and an operation handle that utilizes a sliding second rotation center and an end holding spring to enable a latch operation position, simplifying the structure by eliminating the need for complex guides and using an electric actuator and latch release lever to operate the door latch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If slotted guides are used to guide the door handle for parallel movement, then the door handle can move in parallel from initial posture to operating position, but the structure becomes complicated
Solution Approach 1:
The patent removes the slotted guide component entirely from the mechanism. Instead of using a guide to constrain the door handle's movement path, the invention uses a direct link mechanism where the operation lever is connected to the door latch device through a series of links and connection portions, allowing the door handle to move without requiring complex guiding structures.
Solution Approach 2:
Rather than using a guide to enable movement and then accepting the complexity, the invention inverts the approach by designing a link mechanism that inherently achieves the desired movement without needing separate guiding components. The connection portions and links are designed to provide both the movement capability and structural integrity simultaneously.
2Ease of operation
If a second slotted guide is used to guide the guide portion of the unlocking lever, then the unlocking lever can be guided during door handle movement, but the structure becomes more complicated
Solution Approach 1:
The patent removes the second slotted guide component from the mechanism. The unlocking lever's guide portion is directly integrated into the link mechanism through the second link and connection portions, eliminating the need for separate guiding structures while maintaining the necessary movement control for the latch release operation.
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 provides a simpler structure for the door handle device, enhancing operational reliability and ease of use while maintaining effective latch operation, and incorporates an inertia stopper to prevent unintended door opening during side collisions.
Implementation Method 1
The second link 3 includes an end holding spring 5 configured to apply an urging force to the second rotation center 8 to hold the second rotation center 8 at the initial end position
Data Source
AI summary
A door handle device for a vehicle includes a handle base, a first link and a second link and an operation handle connected to the first link and the second link and to be driven from an initial position to a use position. The operation handle is manually operable to a latch operation position beyond the use position. The second link includes an end holding spring to apply an urging force to hold a rotation center of the second link and the operation handle at an initial end position. The handle base includes a latch release lever to be driven by the second link with a movement of the operation handle from the use position to the latch operation position and to transmit a latch release operation force to a door latch device fixed to the door.