Pivoting Razor Cartridge Coupling to Prevent Handle Separation
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Solution Overview
Problem
Razor handle and cartridge separation during use, leading to inconvenience and potential injury, and incorrect coupling resulting in inefficient shaving due to reversed blade direction.
Innovation Solution
A razor assembly design with a pivotably coupled handle and cartridge, featuring a separation preventing protrusion and accommodating grooves to ensure correct alignment and prevent unintended separation, utilizing an elastic return force providing unit for stable coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the razor handle and cartridge are designed to be easily separable for replacement, then the ease of operation is improved, but the reliability deteriorates due to unintended separation during use
Solution Approach 1:
The connecting arm is designed to move dynamically between a coupled position (where the groove engages the protrusion for stable operation) and a separated position (where the components can be easily detached for replacement). This dynamic positioning resolves the contradiction by providing both stability during use and ease of replacement when needed.
2Reliability
If the razor handle and cartridge are designed to be securely coupled to prevent separation, then the reliability is improved, but the ease of operation deteriorates due to difficulty in separating for replacement
Solution Approach 1:
The coupling mechanism is segmented into distinct functional elements: the protrusion on the cartridge, the groove on the connecting arm, and the elastic member. This segmentation allows the system to provide strong coupling force through the elastic member while enabling easy separation by overcoming this force, thus resolving the contradiction between reliability and ease of operation.
3Reliability
If the razor is designed with a fixed handle-cartridge connection, then the reliability is improved, but the adaptability deteriorates as the cartridge cannot be replaced
Solution Approach 1:
The coupling mechanism transitions from a static fixed connection to a dynamic controllable connection. The elastic member provides continuous coupling force for reliability during use, while the movable connecting arm allows intentional decoupling for cartridge replacement, thus achieving both reliability and adaptability.
4Device complexity
If the razor handle and cartridge are designed with a simple coupling mechanism, then the device complexity is reduced, but the reliability deteriorates due to insufficient prevention of unintended separation
Solution Approach 1:
The elastic member automatically maintains coupling force between the protrusion and groove without requiring external control mechanisms. This self-service approach provides reliable prevention of unintended separation while keeping the overall mechanism simple, resolving the contradiction between device complexity and reliability.
Data Source
AI summary
A razor assembly is proposed. The razor assembly may include a razor cartridge including at least one razor blade, and a razor handle pivotably coupled to the razor cartridge. The razor cartridge may include a blade housing accommodating the razor blade so that at least a portion of a cutting edge of the at least one razor blade is exposed toward a front side and a handle coupling part provided on one side of the blade housing and pivotably coupled to the razor handle. The handle coupling part may include a separation preventing protrusion protruding to prevent the razor handle from being separated from the handle coupling part. The razor handle may include a connecting arm that moves along one surface of the handle coupling part.