Packaging Case L-Shaped Groove Interlocking Assembly
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Solution Overview
Problem
Conventional packaging cases require complex assembly and additional components to maintain the engaged state, which increases the number of parts and assembly time, and may not efficiently accommodate items of different sizes.
Innovation Solution
A packaging case assembled from a single sheet of corrugated board with L-shaped engagement grooves and grooves that alternate in thickness directions, allowing for interlocking without additional cutouts or raised parts, enhancing connection strength and simplifying assembly by using the sheet's restoring forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional packaging cases use additional components and complex assembly methods to maintain engaged state, then connection strength is improved, but device complexity and assembly time increase
Solution Approach 1:
The patent merges the engagement groove and the raised part into a single integrated structure formed by folding the sheet material. The engagement groove is formed by folding back a portion of the sheet, and the raised part is formed by folding another portion, creating a self-contained interlocking mechanism without requiring separate components. This integration reduces the number of parts while maintaining connection strength through the interlocking action of the grooves and raised parts.
Solution Approach 2:
The packaging case structure utilizes its own sheet material to form the engagement grooves and raised parts that create the interlocking mechanism. The sheet material itself serves the dual purpose of forming both the engagement groove and the raised part, eliminating the need for external fastening components. The restoring forces of the sheet material provide the necessary engagement action to maintain connection strength.
2Strength
If conventional packaging cases use additional components and complex assembly methods, then connection strength is improved, but assembly time increases
Solution Approach 1:
The patent segments the sheet material into distinct folded portions that form the engagement groove and the raised part. By dividing the sheet into these segments and folding them into specific configurations, the design creates an interlocking mechanism that can be assembled through simple folding actions rather than complex assembly steps. The segmentation allows for clear definition of assembly boundaries and simplifies the assembly process.
Solution Approach 2:
The engagement groove and raised part are pre-formed by folding the sheet material in advance during the manufacturing process. This preliminary formation of the interlocking structures eliminates the need for additional assembly steps to create these features, as they are already prepared in the folded state. The preliminary folding action creates ready-to-engage structures that simplify the final assembly operation.
3Manufacturing precision
If conventional packaging cases use fixed structures, then manufacturing precision is improved, but adaptability to items of different sizes decreases
Solution Approach 1:
The patent creates a dynamic interlocking mechanism where the engagement groove and raised part can adjust their relative positions and engagement depth to accommodate items of different sizes. The folded sheet structure allows for flexible adjustment of the housing portions while maintaining precise engagement through the interlocking action. The dynamic nature of the folded structure enables adaptation to varying product dimensions without compromising manufacturing precision.
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 solution provides a strong and efficient assembly that reduces the number of components needed, simplifies the assembly process, and allows for flexible adjustment of housing portions to accommodate items of varying sizes without additional parts, maintaining the engaged state effectively.
Implementation Method 1
enhancing connection strength and simplifying assembly by using the sheet's restoring forces
Data Source
AI summary
A packaging case includes a rectangular bottom plate, a pair of first lateral plates, a second lateral plate, a top plate, and a pair of third lateral plates. The pair of first lateral plates is connected, each via a first crease line, to two opposed sides of the bottom plate and each has an L-shaped first engagement groove. The pair of third lateral plates is connected, each via a fourth crease line, to two sides of the top plate parallel to the first lateral plates and each has an L-shaped second engagement groove bent oppositely to a bending direction of the first engagement groove in a state where the third lateral plates overlap the first lateral plates. When the second engagement groove is engaged with the first engagement groove, the first lateral plates and the third lateral plates are connected while alternately intersecting each other in thickness directions thereof.