Vehicle Door Outer Handle Restriction Device
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Solution Overview
Problem
The existing outer handle devices for vehicle doors may experience disengagement of the support member from the base when subjected to excessive force, leading to potential failure in maintaining the attachment state during forced pulling.
Innovation Solution
Incorporation of a restriction device between the outer handle's supported portion and the support member, comprising restricting projection parts on the support member's leg portions and an interposing part on the outer handle, which restricts displacement of the support member toward the side where engagement with the base is released, preventing disengagement even under large forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the support member is attached to the base by engagement of leg portions with support side walls, then the outer handle can be supported and operated, but when the outer handle is forcibly pulled, the engagement may be released and the attachment state cannot be maintained
Solution Approach 1:
The restriction device is designed to preemptively counteract the disengaging force that arises when the outer handle is forcibly pulled. By providing a restriction projection that engages with the support side wall before the leg portions can disengage, the system prevents the harmful effect of engagement release before it occurs.
Solution Approach 2:
The restriction device acts as an intermediary element between the support member and the base. The restriction projection serves as a mediator that transfers and distributes the pulling force, preventing direct disengagement of the leg portions from the support side walls while maintaining the attachment state.
2Ease of operation
If the support member allows free engagement and disengagement with the base, then attachment and detachment of the outer handle is easy, but the support member may disengage under excessive force
Solution Approach 1:
The engagement mechanism is designed to be dynamic rather than static. The leg portions can flex and move to facilitate easy attachment and detachment operations, while the restriction device dynamically engages only when necessary to prevent disengagement under excessive force, maintaining both ease of operation and engagement stability.
Solution Approach 2:
Different parts of the support member have different functional properties. The leg portions are designed with flexibility for easy attachment, while the restriction projection is designed with rigidity and specific geometric features to prevent disengagement under force. This local differentiation of properties allows the system to achieve both ease of operation and reliability.
Data Source
AI summary
An outer handle device for a vehicle door includes: an outer handle having a supported portion on one end part thereof in a longitudinal direction; a support member having paired leg portions sandwiching the supported portion from opposite sides; and a base having paired support side walls sandwiching the leg portions from opposite sides. The supported portion is pivotably supported on the support member attached to the base by the leg portion engaging with the support side wall. A restriction device is provided between the supported portion and the support member, the restriction device restricting displacement of the support member toward a side on which engagement of the support member with the base is released at least when pulling the outer handle. Accordingly, it is possible to maintain a state in which the support member is attached to the base, even when the outer handle is forcibly pulled.