Vehicle Inside Handle Lever Retention With Fold-Out Stopper
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Solution Overview
Problem
Existing inside handle devices for vehicle doors lack a universal coming-off prevention structure that is applicable regardless of the presence of a lock knob and the configuration of the handle lever's accommodation portion in the handle case.
Innovation Solution
An inside handle device with a handle case and a handle lever that includes a coming-off prevention member, which is displaceable between an assembling position and an unfolded position, restricting movement along the rotation axis and preventing the handle lever from coming off the case main body, and is integrally molded with the case main body and cable holding portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a traditional door handle with keyhole is used, then key-based security is provided, but the handle becomes a hiding place for drugs and other contraband
Solution Approach 1:
The patent removes the traditional keyhole component entirely from the door handle system. Instead of modifying the handle to prevent hiding, it extracts the keyhole function and replaces it with a card reader positioned on the door panel adjacent to the handle, eliminating the problematic cavity while preserving access control functionality
Solution Approach 2:
The patent introduces a card reader as an intermediary device between the user and the door opening mechanism. The card reader validates access credentials and triggers the latch release electronically, replacing the mechanical key-hole interaction and eliminating the need for a keyhole in the handle assembly
2Object-affected harmful factors
If the keyhole is removed to prevent contraband hiding, then contraband storage is eliminated, but key-based access is lost
Solution Approach 1:
The patent changes the access parameter from physical key insertion to electronic card validation. The system reads magnetic or RFID data from access cards, compares them against authorized lists, and controls latch activation accordingly. This parameter change eliminates the keyhole while providing adaptable access control for multiple users
Solution Approach 2:
The patent replaces the mechanical key-hole-latch system with an electronic access control system. The card reader, control circuitry, and electromagnetic latch work together to provide keyless entry, substituting mechanical authentication and actuation with electronic equivalents that do not require keyholes
3Object-affected harmful factors
If a card reader is added to the door assembly, then keyless access and contraband prevention are achieved, but device complexity increases
Solution Approach 1:
The door assembly is designed to accommodate multiple access control methods through a universal mounting structure. The card reader, control circuitry, and latch mechanism can work together as an integrated electronic system or function independently, allowing the same hardware configuration to serve multiple security and access control purposes
Solution Approach 2:
The patent combines the card reader, control circuitry, and latch actuation into an integrated door assembly system. The card reader is mounted on the door panel near the handle, the control circuitry is positioned within the latch assembly, and both work together to provide coordinated access control, reducing overall system complexity through functional integration
Data Source
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AI summary
An inside handle device comprising: a handle case; and a handle lever that is rotatably supported by the handle case, wherein the handle lever is inserted into the handle case along an axis of rotation of the handle lever with respect to the handle case, the handle case includes a case body, and a falling-off prevention member that limits the movement of the handle lever in a direction along the axis of rotation to prevent the handle lever from falling off the case body, and the falling-off prevention member is joined to the case body, and is configured to be switchable between an extended position and an attachment position in which the falling-off prevention member prevents the handle lever from falling off the case body.