Receiving Box Cover Engagement via Elastic Convex Portions
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Solution Overview
Problem
Existing receiving boxes with separate covers do not securely engage with the base, leading to disengagement under external impact, potentially damaging contents and causing user inconvenience.
Innovation Solution
The receiving box design incorporates convex portions on the base that correspond to slits and connection parts on the cover, with bending parts that contact the top surface to ensure secure attachment, preventing disengagement during external impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the cover is directly placed on the main body for engagement, then the structure is simple and easy to manufacture, but the engagement strength is insufficient to withstand external impact
Solution Approach 1:
The engagement structure is divided into multiple independent convex portions (first convex portion with bending parts, second convex portion) that independently engage with corresponding slits and connection parts on the cover. This segmentation allows each convex portion to contribute to the overall engagement strength without requiring a complex monolithic structure, resolving the contradiction between strength and complexity.
Solution Approach 2:
The first convex portion incorporates bending parts that can deform elastically in the vertical dimension, allowing the cover to be inserted horizontally while the bending parts provide vertical engagement force. This dimensional transformation enables strong engagement without increasing horizontal structural complexity.
2Reliability
If the cover uses a simple direct cover design, then the ease of manufacture is high, but the reliability under external forces is poor
Solution Approach 1:
The bending parts of the first convex portion are designed to be elastic and deformable, allowing them to dynamically adapt during the engagement process. When the cover is placed on the main body, the bending parts flex to accommodate minor misalignments and then spring back to provide secure engagement, enhancing reliability without requiring precision manufacturing.
Solution Approach 2:
The engagement mechanism utilizes changes in the physical state of the bending parts (from undeformed to deformed and back), transforming mechanical energy during engagement. This parameter change allows the structure to absorb impact forces and maintain reliable engagement under external forces while keeping the manufacturing process simple.
3Reliability
If convex portions with bending parts are used for engagement, then the engagement strength is sufficient to withstand impact, but the device complexity increases
Solution Approach 1:
The engagement system is segmented into multiple functional elements: first convex portion with bending parts for primary engagement, second convex portion for secondary engagement, corresponding slits and connection parts on the cover. This segmentation distributes the engagement function across multiple simple components rather than one complex component, achieving high reliability without excessive complexity.
Solution Approach 2:
The bending parts of the first convex portion are nested within the space defined by the first slit on the cover. When engaged, the bending parts fit within the slit boundaries while providing engagement force, creating a nested configuration that maximizes engagement strength within the available space without adding external complexity.
Data Source
AI summary
A receiving box comprises a cover and a base. The cover comprises a first slit, a first connection part and a top surface. The first slit and the first connection part are respectively disposed at opposite sides of the top surface. The base comprises a first convex portion comprising two first bending parts and a first link part, and a second convex portion. The first convex portion is correspondingly disposed at the first slit. The second convex portion is correspondingly disposed at the first connection part. Two first bending parts are respectively located on opposite sides of the first link part. When the cover combines with the base, the second convex portion inserts into the first connection part, the first convex portion inserts into the first slit, the two first bending parts bend to contact the top surface. Thus, the cover firmly attaches to the base.