Vehicle Door Handle Link Mechanism for Ergonomic Grip
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Solution Overview
Problem
Existing door handle devices for vehicles have poor usability due to a narrow handheld portion that is difficult to grasp, making it challenging for users to operate effectively.
Innovation Solution
A door handle device featuring a handle base, operation handle, first and second link members, and an electric actuator that form a link mechanism allowing the operation handle to protrude from an initial position to a use position while maintaining a parallel posture, providing a wider handhold space and improved graspability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the end portion of the handle only protrudes to the outside in use, then the device maintains a compact form when not in use, but the handheld portion becomes narrow and difficult to grasp
Solution Approach 1:
The handle is divided into multiple segments: a base portion that remains in the housing and an end portion that protrudes. This segmentation allows the handle to maintain a compact form when retracted while providing sufficient grip area when extended, resolving the contradiction between compact storage and ease of operation.
Solution Approach 2:
The handle is designed to be movable between a retracted state (stored in housing) and an extended state (protruding for use). This dynamic configuration allows the same component to serve dual purposes: maintaining compact volume when not in use and providing adequate handheld width when needed.
2Ease of operation
If a sliding pair is used for connection, then the mechanism achieves smooth linear motion, but the risk of malfunction due to freezing increases
Solution Approach 1:
The sliding pair mechanical connection is replaced with a pin connection system. This substitution eliminates the sliding surfaces that are prone to freezing and malfunction, while still achieving the required smooth rotational motion through the pin-joined link members.
Solution Approach 2:
The connection mechanism changes from linear sliding motion to rotational movement around a pin axis. This parameter change in the type of mechanical motion fundamentally reduces the risk of freezing by eliminating the sliding interfaces where ice accumulation typically occurs.
Data Source
AI summary
A door handle device for a vehicle includes a handle base, an operation handle, first and second link members disposed at an interval and rotatably pin-connected to the handle base respectively, and an electric actuator configured to rotatably drive the first link member. The operation handle is connected to the handle base so as to be able to protrude from an initial position to a use position. The operation handle is rotatably connected to end portions of the first and second link members. The handle base, the first and second link members, and the operation handle form a link mechanism in which the operation handle at the use position maintains a posture parallel to the initial position.