Power Tool Storage Case Automatic Locking Mechanism
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Solution Overview
Problem
Conventional power tool storage cases require complex operations for opening and closing, deteriorating usability due to the use of toggle latches that necessitate multiple steps for locking and unlocking.
Innovation Solution
A power tool storage case design featuring a hingedly connected outer lid with a locking portion that automatically engages and disengages when closing and opening, utilizing a locking plate and coil spring for simplified operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a toggle latch is used for locking the outer lid, then the locking reliability is improved, but the ease of operation deteriorates due to requiring multiple steps for locking and unlocking
Solution Approach 1:
The locking mechanism is segmented into distinct functional components: a locking portion with engagement and disengagement positions, and a separate urging member (spring). This segmentation allows the locking portion to focus on reliable engagement while the urging member handles the automatic return function, simplifying the user operation to a single disengagement action.
Solution Approach 2:
The urging member (spring) performs preliminary action by automatically returning the locking portion to the engagement position after the user opens the outer lid. This eliminates the need for the user to manually reset the locking mechanism, reducing the operating steps from multiple actions to a simple open/close motion.
2Reliability
If a toggle latch with engagement member and urging member is used, then the locking reliability is improved, but the device complexity increases due to requiring two separate operations for locking and unlocking
Solution Approach 1:
The locking portion and urging member are merged into an integrated locking mechanism where the urging member is positioned to directly act on the locking portion. This combination reduces the number of separate components and simplifies the overall structure while maintaining reliable locking through the engagement portion and protrusion interface.
Solution Approach 2:
The complex toggle latch mechanism with its multiple moving parts is extracted and replaced with a simplified locking portion that has clearly defined engagement and disengagement positions. The essential locking function is retained through the engagement with the protrusion, while unnecessary complexity is removed.
3Ease of operation
If the locking portion automatically engages when the outer lid is closed, then the ease of operation is improved, but the risk of incidental disengagement may increase
Solution Approach 1:
The urging member (spring) applies preliminary anti-action by continuously exerting force to keep the locking portion in the engagement position. This counteracts any forces that might cause incidental disengagement, ensuring that the locking portion remains securely engaged with the protrusion during normal use while still allowing intentional opening by the user.
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 design enhances usability by allowing for easy and efficient opening and closing of the outer lid, with automatic locking when closed and easy disengagement when opened, reducing the risk of incidental disengagement and improving operational smoothness.
Implementation Method 1
utilizing a locking plate and coil spring for simplified operation
Data Source
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AI summary
A power tool storage case 1 for storing an electric power tool comprises: a main body casing 2 having a storage portion 4 configured to store an electric power tool; a lid member 3 hingedly connected to the main body casing 2 and capable of opening/closing the storage portion 4; a sub-storage portion 13 provided at an outer surface of the lid member 3; and an outer lid 14 hingedly connected to the lid member 3 and capable of opening/closing the sub-storage portion 13. In this storage case 1, a locking portion is provided on the outer lid 14 so that when the sub-storage portion 13 is closed by the outer lid 14, the locking portion is moved to an engagement position at which the locking portion is engaged with an engageable portion provided on the lid member 3. The locking portion is movable from the engagement position to a disengagement position at which the locking portion is disengaged from the engageable portion.