Beard Trimmer Comb Adjustment With Variable Transmission Ratio
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Solution Overview
Problem
Existing hair cutters face challenges with adjustment mechanisms that are cumbersome to handle and control, often requiring two hands and interfering with the support structure, making it difficult to achieve precise and efficient comb position adjustments.
Innovation Solution
An adjustment mechanism with an adjustment wheel having a rotation axis perpendicular to the adjusting direction, featuring different transmission ratios for fine and quick adjustments, allowing precise control with one hand and minimizing interference with the support structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an adjustment mechanism is provided for varying the distance between the cutting elements and the comb's skin contact surface, then the adaptability of the hair cutter is improved, but the device complexity increases due to the additional adjustment components
Solution Approach 1:
The adjustment mechanism is nested within the handle structure, with the adjustment wheel integrated into the grip area and the transmitter mechanism embedded within the handle body. This nesting approach allows the adjustment functionality to be incorporated without significantly increasing the external dimensions or visual complexity of the device.
Solution Approach 2:
The adjustment mechanism employs a dynamic transmission ratio system where the relationship between the adjustment wheel rotation and comb displacement varies during the adjustment range. This dynamic characteristic allows for fine control during certain phases of adjustment while maintaining overall simplicity of the mechanical structure.
2Ease of operation
If the adjustment wheel rotation axis is oriented perpendicular to the adjusting direction, then the ease of operation is improved for one-handed use, but the device complexity increases due to the non-standard orientation
Solution Approach 1:
The adjustment wheel is positioned asymmetrically on the handle with its rotation axis perpendicular to the comb adjustment direction, creating a non-standard configuration that optimizes one-handed operation. This asymmetric arrangement allows the user to rotate the wheel naturally while gripping the handle, without requiring the other hand or interfering with the support structure.
Solution Approach 2:
A transmitter mechanism serves as an intermediary between the adjustment wheel and the comb position control. This intermediary component translates the rotational movement of the wheel into linear displacement of the comb along the adjusted direction, decoupling the orientation of the adjustment wheel from the direction of comb movement and enabling the perpendicular axis configuration.
3Productivity
If a transmission mechanism is provided to translate rotatory movement into adjusting movements, then the productivity of adjustment is improved, but the device complexity increases due to the additional transmission components
Solution Approach 1:
The transmission mechanism features a dynamic transmission ratio that changes during the adjustment range. In certain portions of the adjustment travel, the transmission ratio is optimized for rapid movement (quick adjustment), while in other portions it provides finer control (fine adjustment). This dynamic characteristic allows a single transmission mechanism to deliver high productivity across different adjustment phases without requiring multiple separate mechanisms.
Solution Approach 2:
The transmission mechanism serves multiple functions: it translates rotational movement to linear displacement, provides different transmission ratios for different adjustment phases, and integrates compactly within the handle structure. This multi-functionality reduces the need for separate specialized components, thereby limiting the increase in device complexity while maintaining high adjustment productivity.
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
Enables easy handling and precise control of comb position adjustments with one hand, providing a lightweight and space-saving design that combines fine control with quick adjustment range, enhancing user confidence and intuitive operation.
Implementation Method 1
a transmitter is provided for translating rotatory movement of said adjustment wheel into adjusting movements
Data Source
AI summary
The present invention relates to a hair cutter such as a trimmer, comprising an elongated handle, a cutter head attached to an end portion of said handle and including at least one cutting element, and a comb support structure for supporting a distance comb, wherein an adjustment wheel is provided for adjusting a position of said distance comb relative to said at least one cutting element, said adjustment wheel being rotatably supported about a rotation axis extending transverse to a direction of adjusting the comb position, wherein a transmitter is provided for translating rotatory movement of said adjustment wheel into adjusting movements, wherein said adjustment wheel and/or said transmitter are configured to provide for different transmission ratios for different rotatory positions of the adjustment wheel.