Rotary Beard Trimmer with Adjustable Crown Comb
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Solution Overview
Problem
Current beard trimmers with linear blades cut unevenly due to the direction of beard hair growth and lack adjustable combs for stable skin distance, leading to inconsistent trimming results.
Innovation Solution
A beard trimmer with rotary cutting heads and crown-shaped, height-adjustable combs allows for uniform trimming by adjusting the distance between blades and skin, featuring radial notches on the fixed blade for efficient hair penetration, and optional motorized height adjustment and central spacers for precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If linear moving and fixed blades are used in beard trimmers, then the structure is simple and easy to manufacture, but the trimming result varies considerably depending on the direction of movement across the beard
Solution Approach 1:
The patent replaces the traditional linear back-and-forth blade mechanism with a rotary cutting head that rotates around a vertical axis. This circular motion allows the cutting blades to approach hairs from all directions, ensuring uniform trimming regardless of the direction of movement across the beard. The rotary mechanism transforms the linear motion into rotational motion, creating a more consistent cutting action that addresses the directional sensitivity problem of linear blades.
2Manufacturing precision
If rotary razors are used for close shave, then a very close shave is achieved, but they lack combs to adjust the distance between cutting mechanism and skin, making them unsuitable for beard trimming
Solution Approach 1:
The patent incorporates adjustable combs that can be positioned at different heights relative to the rotary cutting head. These combs are movable and can be adjusted to create different cutting lengths, transforming a static close-shave device into a dynamic, multi-functional tool. The adjustability allows the same rotary mechanism to perform both close shaving and longer beard trimming by changing the comb position, thereby achieving both closeness and versatility.
Solution Approach 2:
The rotary cutting head design with adjustable combs creates a universal device that can perform multiple functions: close shaving when combs are positioned for minimal coverage, and beard trimming at various lengths when combs are adjusted to different heights. This single device replaces the need for separate razors and trimmers, achieving multi-functionality while maintaining the advantages of rotary cutting.
3Ease of operation
If the comb diameter is large to guide hairs, then hair guidance is improved, but it becomes impossible to maintain a consistent distance between the facial skin and the moving blade
Solution Approach 1:
The patent divides the comb structure into multiple segments or teeth that surround the rotary cutting head. This segmentation allows the combs to guide hairs effectively while maintaining sufficient clearance between the cutting blades and the skin. The segmented design creates channels or pathways that direct hairs toward the cutting area without requiring a solid, large-diameter comb that would interfere with blade-skin distance maintenance.
Data Source
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AI summary
The present invention relates to a beard trimmer having one or more rotary cutting heads (1) having a moving blade (2) and a fixed blade (3), each head being surrounded by a telescopic comb (4) in the form of a crown, said comb being height adjustable and making it possible to adjust, in use, the distance between said blades and the skin and thus to set the cutting of the beard hairs to the desired length.