Drawer Slide Auto-Close Reset Mechanism for Jam Recovery
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Solution Overview
Problem
Existing auto-close mechanisms in drawer slides often malfunction, leading to the drawer box inadvertently opening during external forces like airplane turbulence or earthquakes, requiring disassembly for repair, and lack a convenient method for resetting the mechanism.
Innovation Solution
A drawer slide auto-close dampening system with a reset feature, featuring a carriage and actuator that includes a pin and a ramp, allowing the pin to reengage the actuator's catch for automatic closure and providing a method to reset the mechanism by aligning the pin with a ramp to reestablish functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the auto-close mechanism is designed to maintain the drawer box in the closed position, then reliability is improved, but the device complexity increases due to the additional components required
Solution Approach 1:
The patent combines the auto-close mechanism components (actuator, pin, catch, ramp) into an integrated assembly that works together as a unified system. The actuator integrates the catch and ramp features, and the pin serves multiple functions including engagement and resetting, reducing the need for separate components while maintaining reliability.
Solution Approach 2:
The reset feature enables the mechanism to self-correct malfunctions without requiring disassembly or external intervention. When the pin becomes disengaged from the catch, the ramp automatically guides the pin back into proper engagement with the catch during the next opening cycle, allowing the system to restore its own functionality.
2Reliability
If the auto-close mechanism is made more robust to prevent malfunction, then reliability is improved, but the ease of operation deteriorates due to difficulty in resetting
Solution Approach 1:
The reset feature enables the mechanism to self-correct malfunctions without requiring disassembly or external intervention. When the pin becomes disengaged from the catch, the ramp automatically guides the pin back into proper engagement with the catch during the next opening cycle, allowing the system to restore its own functionality.
Solution Approach 2:
The ramp is pre-positioned and pre-configured in the actuator to anticipate potential pin disengagement. The ramp's geometry is designed in advance to automatically guide the pin back into the catch during the normal opening motion, eliminating the need for manual resetting actions by the user.
3Reliability
If the pin is designed to remain engaged with the actuator, then the drawer box remains securely closed, but the ease of operation worsens because the user cannot open the drawer box
Solution Approach 1:
The pin-actuator connection is designed to be dynamically changeable rather than statically fixed. The pin can transition between engaged and disengaged states based on the actuator's position and the forces applied. The ramp feature dynamically adjusts the pin's engagement status during the opening cycle, maintaining security when closed and enabling opening when needed.
Solution Approach 2:
The engagement and disengagement of the pin occurs periodically during the drawer's operation cycle. The pin remains engaged during the closed position to maintain security, then periodically disengages during the opening cycle to allow user access, and re-engages during the closing cycle to restore security.
Data Source
AI summary
A drawer slide with an auto close dampening system with reset feature is disclosed. The drawer slide may incorporate a stationary slide member attached to a frame of the drawer and a pin in fixed relative position to a drawer box of the drawer. A carriage is attached to the stationary slide member and has an actuator that is releasably engageable with the pin. The actuator works in conjunction with the pin to automatically close the drawer box to the closed position. During malfunction, the actuator is drawn back to a retracted position so that the auto close mechanism no longer automatically closes the drawer box when the drawer box is traversed to the closed position. The actuator includes a ramp so that the pin may be pushed over the ramp and engage back with the actuator to reset the auto close mechanism.