Automobile Hatch Latch Control for Accurate Zero Position Setting
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Solution Overview
Problem
Existing opening/closing devices struggle to accurately set the zero position of movable bodies, such as automobile doors, when they are improperly positioned, leading to inefficient operation and potential damage due to incorrect mechanical adjustments.
Innovation Solution
An opening/closing device with a closing mechanism that includes an engaging portion and an engaged portion, utilizing interaction detection to ensure proper engagement and adjust the zero position based on positional differences, allowing for accurate locking and unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the integrated value of pulse signals is reset by the operation of the switch member of the closing mechanism, then the zero position setting is performed, but in a situation where the opening/closing body is movable (such as on a slope), the opening/closing body may move before being locked by the closing mechanism, causing the integrated value to be reset in a position different from the originally supposed zero position
Solution Approach 1:
The control device performs preliminary actions by first causing the closing mechanism to operate and lock the opening/closing body before resetting the integrated value of pulse signals. This ensures that the zero position is set only after the body is securely locked, preventing position errors due to gravitational movement on slopes. The switch member detects the locked state, and only then does the control device reset the counter to zero.
Solution Approach 2:
The control device uses feedback from the switch member to determine when the opening/closing body has been properly locked by the closing mechanism. The switch member provides real-time information about the locking state, and the control device waits for confirmation of proper locking before resetting the integrated value. This feedback mechanism ensures accurate zero position setting even when the body is movable.
2Ease of operation
When the integrated value of pulse signals is reset in a position different from the originally supposed zero position, then an opening operation of the closing mechanism cannot be performed in the zero position by normal control, requiring manual mechanical operation for each time
Solution Approach 1:
The control device performs preliminary locking of the opening/closing body using the closing mechanism before resetting the integrated value of pulse signals to zero. This preliminary action ensures that the body is securely positioned, preventing subsequent position errors that would require manual intervention. By establishing the correct locked state first, the system eliminates the need for repeated manual mechanical operations.
Solution Approach 2:
The control device automatically performs the zero position setting by resetting the integrated value of pulse signals after the closing mechanism locks the opening/closing body. This self-service function eliminates the need for manual mechanical operations to adjust the position, allowing the system to automatically return to normal control operation without user intervention.
3Reliability
If the closing mechanism operates while the opening/closing body is in an improper position, then the body may not be locked correctly, but the system should still be able to set the zero position accurately
Solution Approach 1:
The control device uses feedback from the switch member to accurately determine when the opening/closing body has been properly locked by the closing mechanism, even if the body started from an improper position. The switch member provides real-time information about the locking state, and the control device waits for confirmation of proper locking before resetting the integrated value to zero. This feedback mechanism ensures reliable zero position setting regardless of initial body position.
Solution Approach 2:
The control device performs preliminary locking operations using the closing mechanism to bring the opening/closing body to the correct locked position, even when starting from an improper position. Only after this preliminary locking action is complete and confirmed by the switch member does the control device reset the integrated value. This two-step process ensures accurate zero position setting without requiring complex additional mechanisms.
Data Source
AI summary
An opening/closing body opening/closing device includes: an opening/closing body; a closing mechanism; an opening/driving body driving section; a control section; and a position detection section. The closing mechanism includes an engaging portion, an engaged portion, a closing mechanism-side driving section, and an interaction detection section. The control section causes the closing mechanism-side driving section to perform closing driving and, after the closing driving, sets the engaging part to an open state so as to allow the closing mechanism to lock the opening/closing body through engagement between the engaging portion and the engaged portion when a positional difference between a current position and an engageable position of the opening/closing body is outside a predetermined range. Use of the opening/closing body opening/closing device makes a zero position of the opening/closing body settable in an originally supposed position even when the closing mechanism operates while the opening/closing body is in an improper position.