Packaging Box Bottom Assembly via Tongue and Slit Insertion
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Solution Overview
Problem
Existing packaging boxes with fixed bottoms using tape are prone to damage when carrying heavy objects and require significant manpower for assembly, as they cannot be efficiently mass-produced without manual labor and additional fixing materials.
Innovation Solution
A packaging box design featuring a foldable structure with a first bottom plate and a second bottom plate, where the first bottom plate has a slit and a main inserting part, and the second bottom plate has a tongue that inserts into the slit, allowing for direct and stable assembly without additional adhesives, reducing assembly time and material costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the bottom is fixed using tape after assembling, then the packaging box can be assembled, but the weight of objects carried is restricted and the bottom may be damaged by overweight objects
Solution Approach 1:
The bottom structure is divided into a first bottom plate and a second bottom plate that are separately assembled. The first bottom plate has a bottom opening, and the second bottom plate is inserted through this opening and fixed using inserting parts that engage with the side plates, creating a segmented bottom assembly that distributes structural load and enhances overall strength without requiring tape.
2Ease of manufacture
If the bottom is fixed using tape, then the packaging box can be assembled, but significant manpower and labor are spent on adhering the bottom
Solution Approach 1:
The packaging box structure incorporates self-fixing mechanisms where the second bottom plate has inserting parts that automatically engage with the side plates when inserted through the bottom opening. This self-service fixing mechanism eliminates the need for manual tape application, allowing workers to simply insert the bottom plate and achieve automatic fixation, thereby significantly improving assembly speed and productivity.
3Ease of manufacture
If the bottom is fixed using tape, then the packaging box can be assembled, but this method cannot be performed by a machine
Solution Approach 1:
The manual tape application process is replaced with a mechanical insertion and engagement system. The second bottom plate includes inserting parts with specific geometries that mechanically engage with corresponding features on the side plates. This mechanical substitution allows the bottom assembly to be performed by machines through simple insertion motions, eliminating the need for manual tape application and enabling automated packaging production.
Data Source
Figure 1
Figure 2A~2B
Figure 2C~2D
AI summary
A packaging box includes a body, a first and a second bottom plate. The body has an accommodating space and a bottom opening and includes a first and a second side plate opposite to each other. The first bottom plate is foldably connected to the first side plate and has a first bottom part for covering the bottom opening and a main inserting part foldably connected to the first bottom part. The first bottom part has a slit. When the first bottom part covers the bottom opening, the main inserting part is inserted into the bottom opening. The second bottom plate is foldably connected to the second side plate and includes a second bottom part and a tongue. The second bottom part is superposed on the first bottom part. The tongue is inserted into the slit, so that the second bottom plate is detachably fixed to the first bottom plate.