Shift Lever Engaging Structure to Prevent Excessive Deformation
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Solution Overview
Problem
Existing shift lever structures face issues with excessive deformation of the fixing member, which can lead to detachment problems and instability in shift position changes.
Innovation Solution
A shift device with an engaging member featuring resilience, which engages with first and second engaging portions to restrict detachment, and a restricting portion that prevents excessive deformation by limiting the pushing force on the engaging member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the engaging member is made resilient to allow easy engagement and disengagement, then the ease of operation is improved, but the risk of excessive deformation increases
Solution Approach 1:
The restricting portion is pre-configured to limit the pushing distance of the engaging member before excessive deformation can occur. This preliminary structural constraint ensures that even though the engaging member is resilient, it cannot be deformed beyond a safe threshold, thus resolving the contradiction between ease of operation and resistance to excessive deformation
2Ease of operation
If the engaging member can be easily pushed to release engagement, then the ease of operation is improved, but the reliability of preventing unintended detachment deteriorates
Solution Approach 1:
The restricting portion pre-establishes a controlled path and limit for the engaging member's movement. This allows intentional pushing to release engagement while preventing unintended detachment by blocking excessive movement paths, thus resolving the contradiction between ease of operation and reliability
3Ease of operation
If the engaging member is designed to deform for releasing engagement, then the ease of operation is improved, but the stability of the shift position deteriorates
Solution Approach 1:
The restricting portion pre-defines the exact deformation path and limit of the engaging member. This ensures that the engaging member can deform sufficiently to release engagement when intentionally pushed, but cannot deform excessively to compromise shift position stability, thus resolving the contradiction between ease of operation and stability
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 effectively inhibits excessive deformation of the engaging member, ensuring stable shift position changes and preventing unintended detachment of the operation body from the shift main body.
Implementation Method 1
an engaging member with resilience, the engaging member engaging with the first engaging portion and the second engaging portion
Data Source
AI summary
A shift device includes a shift main body, an operation body, a resilient engaging member and a restricting portion. The shift main body structures a shift body, which is moved to change a shift position. A first engaging portion is provided at the shift main body. The operation body structures the shift body, and is operated to move the shift body. A second engaging portion is provided at the operation body. The engaging member engages with the first engaging portion and the second engaging portion and restricts detachment of the operation body from the shift main body. When the engaging member is pushed, the engaging member deforms and releases the engagement with the first engaging portion or the second engaging portion. The restricting portion restricts pushing of the engaging member after the engagement of the engaging member with the first engaging portion or second engaging portion has been released.