Pivoting Razor Handle With Restoring Force and Impact Cushioning
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Solution Overview
Problem
Existing razors with pivoting cartridges face challenges in achieving a close and smooth shave while minimizing component damage and ensuring user safety, particularly when exposed to external impacts.
Innovation Solution
A razor handle design with a detachable cartridge that incorporates a first and second restoring force providing part, a plunger housing, and a head housing, allowing for controlled rotations and movements of the cartridge, minimizing friction and impact damage through elastic members and stoppers, and enhancing user safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the razor cartridge is made pivotable to enhance freedom of movement and achieve closer shave, then shaving performance is improved, but the risk of component damage under external impacts increases
Solution Approach 1:
The patent incorporates a plunger housing with elastic members (springs) that are pre-configured to cushion external impacts before they can damage the razor cartridge or its pivot mechanism. The plunger housing acts as a shock-absorbing structure that compresses under impact forces, protecting the delicate pivoting components from damage while maintaining their freedom of movement during normal shaving operations.
2Reliability
If multiple restoring force providing parts are added to control cartridge rotation and movement, then shaving performance and safety are improved, but device complexity increases
Solution Approach 1:
The patent designs the plunger housing to serve multiple functions simultaneously: it guides the rotation of the razor cartridge around the pivot axis, provides shock absorption through elastic members, and incorporates stoppers to limit rotational movement. By making the plunger housing a multi-functional component, the patent reduces the need for separate restoring force providing parts, thereby controlling device complexity while maintaining user safety and controlled movement.
3Adaptability or versatility
If the razor cartridge is allowed to rotate freely around both parallel and perpendicular axes, then shaving adaptability is improved, but the number of parts required increases
Solution Approach 1:
The patent combines the mechanisms for rotation around the parallel axis (first rotation) and perpendicular axis (second rotation) into an integrated pivoting system. The razor cartridge is pivotally coupled to the handle assembly with a single pivot axis, allowing coordinated rotation in both directions through the interaction of the plunger housing, elastic members, and stoppers. This merging of rotation mechanisms reduces the number of separate parts compared to having independent rotation systems for each axis.
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 component damage and improved safety by allowing controlled rotational movements and cushioning against external impacts, while requiring fewer parts for assembly.
Implementation Method 1
a second restoring force providing part configured to provide a second restoring force to the plunger housing
Implementation Method 2
Minimization of component damage even under external impacts
Data Source
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AI summary
A razor handle according to an embodiment of the present invention is configured to be coupled to a razor cartridge that accommodates at least one blade. The razor handle includes: 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; and 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.