Spring-Loaded Locking Pawl for Secure Container Stacking
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Solution Overview
Problem
Existing container stacking systems face challenges in secure and efficient locking mechanisms, particularly in the lateral adjustment and detachment of containers, which complicates stacking and transportation.
Innovation Solution
A container stacking system featuring a base, peripheral side walls, a hinged lid, and a spring-loaded locking pawl mechanism with latching surfaces and grooves, allowing for snap-locking and easy detachment, where the locking pawl automatically engages when containers are correctly positioned, and a recessed grip and button facilitate unlocking and lifting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring-loaded locking pawl mechanism with conical contact surface is used, then the locking reliability is improved, but the device complexity increases
Solution Approach 1:
The locking pawl mechanism is designed to automatically engage and lock when the upper container is placed on the lower container. The conical contact surface automatically pushes the pawl back during engagement, and the spring automatically returns the pawl to the locked position, eliminating the need for manual intervention and reducing operational complexity despite the increased mechanical complexity of the mechanism itself.
Solution Approach 2:
The conical contact surface is positioned to预先 (pre) push the locking pawl back before the locking groove and locking protrusion can engage. This preliminary action ensures that the pawl is in the correct position to receive the locking protrusion, preventing misalignment and ensuring reliable locking without requiring complex adjustment mechanisms.
2Reliability
If locking pawls are provided on both sides of the locking element, then the locking reliability is improved, but the device complexity increases
Solution Approach 1:
The locking mechanism is designed with asymmetry where the upper container has active locking elements (locking protrusions and pawls) while the lower container has passive receiving elements (locking grooves). This asymmetric design provides secure two-sided locking without requiring identical complex mechanisms on both containers, reducing overall system complexity while maintaining reliability.
3Ease of operation
If a recessed grip and button are provided close to each other, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The grip recess and release button are merged into a single integrated assembly on the container side wall. The button is positioned within easy reach of the grip, allowing the user to simultaneously hold the container with one hand while operating the release mechanism with the same hand or the other hand, simplifying the detachment operation despite adding mechanical components.
Solution Approach 2:
The button is designed to directly actuate the locking pawl mechanism through a simple mechanical connection. When pressed, the button immediately releases the pawl from the locked position, allowing the container to be detached without requiring complex sequences or multiple steps, making the operation intuitive and easy despite the added component.
4Duration of action of stationary object
If the locking lug and locking latch are arranged in a recess, then the wear on locking components is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The recess in which the locking lug and latch are arranged serves as a protective cushion that absorbs misalignment and positioning errors. By providing this recess space beforehand, the design protects the precise locking surfaces from direct contact with external surfaces that would cause wear, while the recess itself tolerates reasonable manufacturing variations in positioning.
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 system provides secure stacking and easy detachment of containers, minimizing wear on locking components and allowing for safe storage and transportation without complex handling.
Implementation Method 1
a spring-loaded locking pawl is provided, which can snap into a complementary locking groove on the other container to lock the stacked containers
Implementation Method 2
it is pushed back by a conical contact surface, similar to a door lock mechanism, overcoming the spring force of a clamping element
Data Source
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AI summary
The container (10) has four side walls (16) and a base (12) defining a surface area of the container. A locking lug (18) and a recess groove (20) are provided complementary at upper and lower sides of two opposite walls such that the containers are stacked non-shiftably with models constructed over the surface area. A spring-preloaded locking bolt (22) is provided at both sides of the lug and a locking latch is provided at the groove such that the bolt cooperates with the latch during stacking and the models are automatically lockable with each other.