Bidirectional Razor Cartridge with Support Bar
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Solution Overview
Problem
Conventional razor cartridges are limited in providing multiple shaving directions and levels, leading to reduced durability, increased skin injury risk, and inefficient shaving experiences.
Innovation Solution
A bidirectional razor cartridge design featuring at least one first cutting member and one second cutting member arranged in a housing, with a longitudinal support bar between them, allowing for shaving in opposite directions, reducing skin pressure, and incorporating guard or comb-like bars for enhanced skin support and lubrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a conventional unidirectional razor cartridge is used, then the structure is simple, but the shaving durability is reduced and the cartridge needs frequent replacement
Solution Approach 1:
The razor cartridge is divided into multiple cutting members with different shaving directions (forward, backward, lateral). Each cutting member is independently positioned on the support bar, allowing the cartridge to handle hair growth in multiple directions simultaneously, thereby extending shaving durability.
Solution Approach 2:
The support bar serves multiple functions: it supports multiple cutting members, provides a mounting surface for lubricating strips, and acts as a structural backbone for the entire cartridge assembly. This multi-functionality increases durability without proportionally increasing complexity.
2Object-affected harmful factors
If a single cutting member is used, then the device is simple, but the skin injury risk increases due to concentrated pressure
Solution Approach 1:
The cutting function is segmented across multiple blades positioned at different locations and orientations. This distributes the mechanical pressure across multiple contact points on the skin, reducing the risk of concentrated pressure causing nicks or cuts.
Solution Approach 2:
Different cutting members are positioned to address specific shaving needs in different areas. The lateral cutting member handles sideburns and ear hair, while forward and backward members handle main shaving areas, optimizing pressure distribution and reducing skin injury risk.
3Adaptability or versatility
If only one shaving direction is provided, then the device is simple, but it cannot accommodate different shaving levels and directions
Solution Approach 1:
The cutting members are segmented into different directional groups (forward, backward, lateral) mounted on the support bar. This segmentation allows the cartridge to adapt to various shaving directions and levels without requiring multiple separate cartridges.
Solution Approach 2:
The support bar extends in the longitudinal dimension, allowing cutting members to be positioned at different locations along its length. This dimensional arrangement enables multiple shaving directions and levels to be incorporated into a single cartridge structure.
4Object-affected harmful factors
If the blade support contacts the skin directly, then the structure is simple, but the skin bulging effect increases and nicks occur
Solution Approach 1:
The support bar acts as an intermediary between the blade support and the skin. It provides a stable mounting surface for the cutting members while distributing contact pressure, preventing direct blade support-skin contact that would cause bulging and nicks.
Data Source
Figure 1a~1c
Figure 1d~2b
Figure 2c~3b
AI summary
A razor cartridge comprises a housing (1), at least one first cutting member (6) and at least one second cutting member (7). The at least one first cutting member (6) and the at least one second cutting member (7) are arranged in the housing (1). The at least one first cutting member (6) is configured to shave in a first direction, and the at least one second cutting member (7) is configured to shave in a second direction opposite to the first direction. A longitudinal support bar (8) is arranged between the at least one first cutting member (6) and the at least one second cutting member (7). The at least one first cutting member (6) comprises a blade support (20) including a top portion (22) having an inner surface (19) that, in use, faces away from a shaving plane (15) and a blade (21) attached to the inner surface (19) of the top portion (22), wherein the blade (21) includes a cutting edge (14a).