Storage Box Lock Mechanism Using Direct Cam Rotation Restriction
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Solution Overview
Problem
Conventional storage box lock mechanisms have a large number of parts, leading to a complex movement and structure, which is inefficient and prone to failure under heavy loads.
Innovation Solution
A simplified lock mechanism using a cam support member and a rotation lock plate to restrict the rotational movement of the cam member, reducing the number of parts and enhancing structural integrity by reinforcing the rotation lock plate with a contact part on the cam support member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a link mechanism is used to enable rotational movement of the cam member, then the lock mechanism can function, but the number of parts increases and the structure becomes complex
Solution Approach 1:
The patent extracts and eliminates the link mechanism from the lock system, replacing it with a direct interaction between the rotation lock plate and cam member. The rotation lock plate directly restricts cam member rotation through contact, removing the intermediate link mechanism and its associated complexity while maintaining the locking function.
Solution Approach 2:
The rotation lock plate serves multiple functions: it restricts rotational movement of the cam member, provides a contact surface for load bearing, and enables lock status confirmation. By consolidating these functions into a single component rather than requiring a complex link mechanism, the patent reduces part count while maintaining reliability.
2Device complexity
If the rotation lock plate restricts rotational movement by contacting the cam member, then the structure is simplified, but the strength may be insufficient under heavy loads
Solution Approach 1:
The patent applies local quality by providing a specifically designed contact part on the cam support member that interfaces with the rotation lock plate. This contact part is positioned and dimensioned to concentrate and distribute loads appropriately, reinforcing the rotation lock plate at the critical contact area while maintaining overall structural simplicity.
Solution Approach 2:
The interaction between the rotation lock plate and cam support member contact part creates a composite structural system where the combined elements provide enhanced strength and load-bearing capability compared to either component alone, while maintaining the simplified overall structure.
Data Source
AI summary
A lock mechanism of a storage box can secure and release a lock pin of a lid member with a rotational operation of a cam member, and includes a cam support member for supporting the cam member, and a rotation lock plate for restricting the rotational movement of the cam member, in which the rotation lock plate is configured to restrict the rotational movement of the cam member in a case that the rotation lock plate is at a position along a contact part provided on the cam support member.