Spherical Razor Handle Assembly for Precise Blade Pressure Control
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Solution Overview
Problem
Existing razors with pivoting mechanisms have issues with user control due to increased distance between the hand and blades, leading to difficulty in maintaining the appropriate angle and pressure, resulting in razor burn and inefficient shaving.
Innovation Solution
A razor design featuring a substantially spherical handle with a razor head attached, allowing for direct fingertip control and rotation around multiple axes, providing ergonomic control and reduced likelihood of cuts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pivoting means are incorporated between the head and handle to enable the head to conform to the shape of the user, then adaptability is improved, but the distance between the user's hand and the blades increases, making it more difficult to precisely control the location and pressure of the blade relative to the skin
Solution Approach 1:
The razor is divided into functionally independent segments: a spherical handle for grip and rotation control, a mounting portion for connection, and a razor head for shaving. This segmentation allows each component to optimize its function without compromising overall control precision.
Solution Approach 2:
Instead of placing pivoting means between the handle and head that increase distance, the invention inverts the approach by using a spherical handle that enables direct fingertip control of the razor head through rotation, eliminating the need for intermediate pivoting mechanisms that compromise control precision.
2Ease of operation
If pivoting means are incorporated to enable the head to pivot relative to the handle, then ease of operation is improved, but the number of individual parts increases, resulting in a complicated assembly and higher manufacturing cost
Solution Approach 1:
The spherical handle integrates multiple functions into a single component: it provides the gripping surface, enables rotational movement around multiple axes, and serves as the mounting structure for the razor head. This merging eliminates the need for separate pivoting mechanisms, reducing part count and assembly complexity while maintaining ease of operation.
Solution Approach 2:
The spherical handle is a universal component that performs multiple functions: it serves as the grip surface, provides rotational freedom around multiple axes for ergonomic control, and acts as the mounting structure for the razor head. This multi-functionality reduces the overall device complexity by eliminating the need for separate specialized components.
3Ease of manufacture
If the handle is located far from the razor head, then ease of manufacture is improved, but the ability to apply direct pressure to the razor head with fingertips is reduced, decreasing control precision
Solution Approach 1:
The spherical handle enables dynamic positioning and rotation of the razor head, allowing the user to bring the handle (and thus control point) close to the razor head during use. This dynamic adjustment maintains precise pressure control while allowing manufacturing flexibility.
Solution Approach 2:
The invention changes the spatial parameter by positioning the spherical handle proximate to the razor head (within half the head width), rather than at a fixed distance. This parameter change enables direct fingertip pressure application to the razor head while maintaining manufacturing simplicity through the standardized spherical geometry.
Data Source
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Figure 5a
AI summary
A razor and a razor handle assembly are disclosed that provides greater control when shaving. The razor includes a substantially spherical handle to which a razor head including one or more blades is attached, the handle having a diameter between about 3 and 5cm and a distance between the razor head and the handle is no greater than half a width of the razor head. The razor is sized and shaped to enable the spherical handle to be held in a palm of a hand of a user in a first configuration such that finger tips of that hand are able to apply pressure directly to the razor head, and held in the second configuration between a thumb and finger tips of the user such that the razor may be rotated around at least two axes through relative movement of the user's fingers and thumb.