Razor Handle Inserts Encapsulated in Holes for Weight Balance

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Solution Overview

Problem

Existing razor handles with multiple complex-shaped inserts are difficult to assemble and manufacture, and the inserts can inadvertently detach, leading to manufacturing challenges and a suboptimal shaving experience.

Innovation Solution

The inserts are partially encapsulated within holes in the razor handle, providing a secure and balanced weight distribution, preventing detachment, and enhancing the ergonomic design for improved shaving comfort and balance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If multiple complex-shaped inserts are provided on the razor handle to provide proper weight and prevent deformation, then the weight distribution and structural stability are improved, but the assembly and manufacturing difficulty increases

Engineering Contradiction:

Improvestructural stabilityVSAvoidassembly difficulty

Core Design Contradiction:

Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

The insert is divided into multiple portions that can be separately manufactured and then assembled into the handle. This segmentation allows for easier manufacturing of individual components while maintaining the overall structural stability when assembled, resolving the contradiction between structural integrity and manufacturing ease.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The insert portions are nested within cavities in the handle body, with each portion fitting into a specific cavity. This nesting approach simplifies assembly by providing predefined positions and reduces manufacturing complexity by allowing separate production of handle and insert components, while still achieving the desired weight distribution and structural stability.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Stability of the object's composition

Engineering Contradiction:

Improvestructural stabilityVSAvoidinsert complexity

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The complex insert is segmented into multiple simpler portions that can be manufactured independently. Each portion has a simplified geometry that is easier to manufacture, while the collective arrangement of these portions within the handle achieves the required structural stability and weight distribution, thereby reducing overall device complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the insert are placed in specific cavities at different locations within the handle, optimizing the weight distribution and structural support locally. This local quality approach allows each portion to serve a specific function with simpler geometry, reducing the overall complexity while maintaining structural integrity.

Inventive Principle:

Principle #3Local quality

3Ease of operation

If inserts are provided on the razor handle to provide proper weight for precise and comfortable shaving, then the shaving comfort is improved, but the risk of inadvertent detachment increases

Engineering Contradiction:

Improveshaving comfortVSAvoidinsert retention

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The insert portions are nested within cavities in the handle body, providing mechanical retention through the cavity walls. This nesting structure prevents inadvertent detachment while maintaining the weight distribution necessary for comfortable shaving, thus resolving the contradiction between shaving comfort and insert retention reliability.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The insert is segmented into multiple portions that can be independently retained within separate cavities. This segmentation allows for more secure retention of each portion within its cavity, reducing the risk of detachment while maintaining the overall weight balance for comfortable shaving operation.

Inventive Principle:

Principle #1Segmentation

4Reliability

If the inserts are encapsulated within the elongated body, then the inserts cannot be detached and the hold is improved, but the manufacturing complexity increases

Engineering Contradiction:

Improveinsert retentionVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The insert portions are nested within cavities that are formed as integral parts of the handle body. This nesting approach provides secure encapsulation that prevents detachment while allowing the handle and inserts to be manufactured separately and assembled, thereby maintaining ease of manufacture while achieving reliable retention.

Inventive Principle:

Principle #7Nested doll (Nesting)

Data Source

PatentUS11396107B2Razor handle comprising inserts within holes and razor comprising such a razor handle

Publication Date: 2022.07.26 BIC VIOLEX SA

AI summary

A razor includes a razor handle connected to a razor cartridge. The razor handle includes an elongated body extending in a longitudinal direction, and having an upper face and a lower face opposite the upper face. The upper face and lower face form at least a portion of an outermost surface of the razor handle. The outermost surface is provided with a first hole and a second hole. The first and second holes open on the outermost surface of the razor handle. The first hole extends from the upper face to the lower face of the outermost surface of the elongated body and includes an insert partially encapsulated within the first hole. The second hole includes an elongated bar or rib dividing the second hole into two parts. The elongated bar or rib extend in the longitudinal direction and is exposed on the upper face of the elongated body.