Integrated Vehicle Door Handle Merging Grip and Latch
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Solution Overview
Problem
The existing design of vehicle door handles limits the freedom to design the door trim and increases production costs due to the presence of both a door inside handle and a door grip handle, necessitating a solution that integrates their functions while reducing costs.
Innovation Solution
A hand grippable inside handle is designed with an upper and lower grip handle coupled to the vehicle door, featuring a grip type inside handle that pivots to operate the door latch, incorporating a grid structure for the inside handle rod, a link lever, and a return spring, allowing for enhanced design flexibility and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If both door inside handle and door grip handle are installed on the vehicle door, then the door can be opened reliably, but the design freedom of door trim is reduced and production cost increases
Solution Approach 1:
The patent combines the door inside handle and door grip handle into a single integrated handle assembly. The grip housing serves as both the decorative trim and the functional grip, while the inside handle rod operates the latch mechanism. This merging eliminates the need for separate handles, thereby increasing design freedom and reducing production costs while maintaining reliable door opening functionality.
Solution Approach 2:
The integrated handle assembly performs multiple functions: the grip housing provides both aesthetic appearance and gripping surface, the inside handle rod operates the latch, and the overall structure serves as both trim and functional component. This multi-functionality allows a single component to replace what previously required multiple separate parts, resolving the contradiction between reliability and design freedom.
2Reliability
If both door inside handle and door grip handle are installed on the vehicle door, then the door can be opened reliably, but production cost increases
Solution Approach 1:
By merging the door inside handle and door grip handle into a single integrated assembly, the patent reduces the number of parts that need to be manufactured, stored, and assembled. The grip housing and inside handle rod form a unified structure that can be produced more efficiently than two separate handles, thereby reducing production costs while maintaining reliable door opening function.
3Reliability
If the inside handle rod is made rigid for reliable latch operation, then the latch operates reliably, but accidental door opening under impact cannot be prevented
Solution Approach 1:
The patent replaces the rigid inside handle rod with a flexible rod that can bend. This dynamic characteristic allows the rod to flex under impact forces (preventing accidental door opening) while still transmitting sufficient force under normal operating conditions to reliably operate the latch mechanism. The flexibility introduces a dynamic response that differentiates between intentional user action and external impact.
Solution Approach 2:
The patent changes the physical parameter of the inside handle rod from rigid to flexible. This parameter change allows the rod to exhibit different mechanical behaviors: under normal pulling forces, it maintains sufficient stiffness to operate the latch, but under impact forces, it bends to prevent accidental opening. This parameter modification resolves the contradiction between reliability and safety.
Data Source
AI summary
The present disclosure provides a hand grippable inside handle. Some forms of the present disclosure may include an upper grip handle and a lower grip handle which are coupled to an inner side of a door of a vehicle, a grip type inside handle having an upper portion engaged with the upper grip handle and a lower portion engaged with the lower grip handle, and an inside handle rod installed inside the grip type inside handle and configured to pivot with the grip type inside handle about an axis in a length direction when the grip type inside handle is pivoted, thereby operating a latch device of the door.