Pivoting Razor Handle With Dual Restoring Force Cushioning
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Solution Overview
Problem
Existing razors with replaceable cartridges lack the ability to provide a close and smooth shave while ensuring user safety and minimizing component damage under external impacts.
Innovation Solution
A razor handle design that incorporates a pivoting razor cartridge with a first and second restoring force providing mechanism, allowing for controlled rotational movements and cushioning, thereby enhancing shaving comfort and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pivoting razor cartridge mechanism is added to enable close and smooth shaving, then shaving comfort is improved, but device complexity increases
Solution Approach 1:
The patent combines the pivoting mechanism and restoring force mechanism into an integrated assembly where the cartridge housing, plunger, and spring work together as a unified system. The plunger is received within the cartridge housing and the spring is received within the plunger housing, creating a compact merged structure that achieves close shaving without excessive complexity
Solution Approach 2:
The razor cartridge assembly serves multiple functions: it provides the cutting function through blades, the pivoting function for adaptability to skin contours, and the restoring force function to return the cartridge to its original position. This multi-functionality is achieved within a single integrated cartridge structure rather than separate components
2Reliability
If a restoring force mechanism is added to control cartridge movement, then user safety is improved, but device complexity increases
Solution Approach 1:
The spring-based restoring force mechanism is a passive self-service system that automatically returns the cartridge to its original position after pivoting without requiring user intervention. The spring is pre-loaded and automatically engages when the cartridge pivots, providing safety through autonomous operation rather than complex control systems
Solution Approach 2:
The restoring force mechanism uses simple, inexpensive components like springs and plungers that can be easily manufactured and replaced. The entire cartridge assembly including the restoring force mechanism is designed as a disposable unit that is replaced rather than repaired, reducing the need for complex maintenance systems
3Reliability
If cushioning mechanisms are added to minimize component damage from external impacts, then reliability is improved, but device complexity increases
Solution Approach 1:
The spring-based restoring force mechanism serves a dual function: it provides the necessary restoring force for pivoting and simultaneously acts as a cushioning element to absorb external impacts. The spring is pre-loaded and positioned to immediately absorb impact forces, protecting the cartridge and handle from damage before the impact can cause harm
Solution Approach 2:
The restoring force mechanism serves multiple protective functions: it controls cartridge pivoting during normal operation and simultaneously provides impact cushioning during external shocks. This multi-functionality eliminates the need for separate cushioning mechanisms, reducing overall device complexity while maintaining reliability
4Device complexity
If fewer parts are used in the razor handle design, then device complexity is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent merges multiple functions into fewer components: the cartridge housing contains the plunger, the plunger housing contains the spring, and the entire assembly integrates with the handle. This merging reduces the total number of parts while requiring precise manufacturing to ensure proper fit and function of the integrated components
Solution Approach 2:
The razor is segmented into modular components (handle, cartridge, blade assembly) that can be manufactured separately and assembled. The cartridge assembly is further segmented into functional sub-components (housing, plunger, spring) that are pre-assembled as a unit, reducing the number of parts that need to be handled during final assembly while maintaining manufacturing precision through standardized interfaces
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 design enables a close and smooth shave with reduced risk of cuts and minimizes component damage from external impacts, while requiring fewer parts for assembly.
Implementation Method 1
a first elastic member positioned at the rear of the first pressing part and configured to provide an elastic force to the first pressing part
Implementation Method 2
a second elastic member positioned at the rear of each of the first arm and the second arm and configured to apply an elastic force to each of the first arm and the second arm in the first direction
Data Source
AI summary
A razor handle is proposed. The razor handle may be configured to be coupled to a razor cartridge that accommodates at least one blade. The razor handle may include a first restoring force-providing unit that provides a first restoring force against a first pivoting of the razor cartridge about a first rotation axis parallel to the extension direction of the blade. The razor handle may also include a second restoring force-providing unit that provides a second restoring force against the movement of the razor cartridge in a first direction from the razor cartridge toward the razor handle.