Shift Device Restriction Member Dynamics
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Solution Overview
Problem
Existing shift devices fail to restrict movement of the shift member from the first shift position to the second shift position when the detent pin is in a release position, leading to unintended movement to the third shift position.
Innovation Solution
A shift device with a restriction member and a release section that utilizes a detent pin to enable movement from the first shift position to the second shift position, while preventing movement to the third shift position by using a movable member and a movement section to cancel and reapply the restriction as necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the detent pin is moved to the release position to enable movement from the first shift position to the second shift position, then the shift member can move freely, but the shift member may unintentionally move to the third shift position without restriction
Solution Approach 1:
The restriction member is designed to dynamically change its position based on the shift member's location. It restricts the detent pin when the shift member is between the first and second shift positions, then releases the restriction when the shift member reaches the second shift position. This dynamic adjustment allows free movement when needed while preventing unintended movement at other times.
Solution Approach 2:
The restriction member acts as an intermediary between the detent pin and the third shift position. It selectively blocks the detent pin's movement path to prevent skipping to the third shift position, while allowing normal operation between the first and second shift positions. The release section serves as another intermediary that coordinates the restriction member's action with the shift member's position.
2Reliability
If the restriction member continuously restricts the detent pin to prevent skipping to the third shift position, then position control is maintained, but normal movement from the first shift position to the second shift position is blocked
Solution Approach 1:
The restriction member transitions from a static blocking component to a dynamic one that responds to the shift member's position. It is positioned to restrict the detent pin during normal operation, then automatically releases this restriction when the shift member reaches the second shift position, enabling subsequent movement to the third shift position when intended.
Solution Approach 2:
The restriction member is pre-positioned to block the detent pin before the shift operation begins. This preliminary restriction prevents skipping to the third shift position. The release section then performs the action of releasing this restriction at the appropriate moment when the shift member reaches the second shift position.
Data Source
AI summary
A shift device is configured including a restriction member and a release section. The restriction member stops a detent pin that has been moved at a release position, restricting movement of a shift lever to a third shift position when the shift lever is moved from a first shift position to a second shift position. When the shift lever has been moved at the second shift position, by the detent pin being moved to the release position from a non-release position, the release section releases the restriction of movement of the shift lever toward the third shift position by the restriction member.