Folding Cart Locking Mechanism to Prevent Side Panel Self-Unlocking
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Solution Overview
Problem
Existing folding carts suffer from unstable unfolding due to self-unlocking issues with locking rod or sliding lock structures, requiring continuous user operation for locking and unlocking, leading to poor user experience.
Innovation Solution
A locking device with a button mechanism and movable portion that switches between initial and pushed states, engaging and disengaging fixing hooks with a locking member to maintain the unfolded state without user intervention and allowing easy folding by transitioning to the unlocked state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking rod structure or sliding lock structure is used to lock foldable side panels, then the folding cart can be locked in the unfolded state, but the locking structure carries a risk of self-unlocking during use and requires continuous user operation
Solution Approach 1:
The locking device utilizes the elastic force of the elastic member to automatically maintain the locked state without requiring continuous user operation. When the side panel is in the unfolded state, the elastic member stores elastic potential energy that automatically keeps the locking member engaged with the fixing hooks, achieving self-service locking functionality.
Solution Approach 2:
The locking device transitions from a static locking mechanism to a dynamic one where the movable portion can slide between locked and unlocked states. The elastic member provides dynamic force to maintain engagement, while the push portion allows easy transition to the unlocked state when needed, resolving the contradiction between automatic locking and ease of unlocking.
2Reliability
If a locking rod structure or sliding lock structure is used to lock foldable side panels, then the folding cart can be locked in the unfolded state, but the locking structure carries a risk of self-unlocking during use
Solution Approach 1:
The locking device performs preliminary action by pre-positioning the locking member to engage with the fixing hooks before any self-unlocking can occur. The elastic member is pre-loaded to continuously exert force on the locking member, ensuring it remains firmly engaged with the fixing hooks, thereby preventing self-unlocking before it can happen.
Solution Approach 2:
The elastic member acts as a cushioning element that compensates for any forces or vibrations that might cause self-unlocking. It stores elastic energy that counteracts external disturbances, providing a safety margin that prevents the locking member from disengaging from the fixing hooks under normal operating conditions.
3Reliability
If a locking rod structure or sliding lock structure is used, then the side panels can be locked, but both processes of locking and unlocking require the user to continuously drive the movement of the locking structure
Solution Approach 1:
The locking device automatically maintains the locked state through the elastic force of the elastic member, eliminating the need for continuous user operation to keep the side panels locked. The system serves itself by using stored elastic energy to maintain engagement, significantly reducing the time and effort required for locking operations.
Solution Approach 2:
The locking mechanism operates in a periodic manner where the elastic member continuously exerts periodic force to maintain engagement. This periodic action ensures the locking member remains firmly engaged with the fixing hooks throughout the operational cycle, providing reliable locking without requiring continuous user intervention.
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 locking device stabilizes the unfolded state by preventing self-unlocking and simplifies the folding process with a push-to-unlock operation, enhancing user experience and stability.
Implementation Method 1
the elastic member is able to drive the movable portion to reset from the pushed state to the initial state
Data Source
AI summary
The provided is a locking device for a folding cart, including a button mechanism and a locking member, where the button mechanism includes a movable portion and multiple fixing hooks; the movable portion is slidably disposed on a first panel body of the folding cart; the locking member is connected to a second panel body of the folding cart; the first panel body is hinged to the second panel body; and the movable portion is able to switch between an initial state and a pushed state. When the movable portion is in the initial state, a side panel is effectively locked, and the locked state of the side panel is effectively maintained without user operation. This design improves the stability of the side panel in an unfolded state, preventing the folding cart from self-unlocking during use, and enhancing the stability of the folding cart in an unfolded state.