Metal-Plastic Composite Blade Set for Dual Shaving and Trimming
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hair cutting devices, such as razors and trimmers, are not well-suited for both shaving and trimming operations due to design limitations, leading to user discomfort, performance issues, and increased manufacturing costs, with combined devices being heavy, complex, and difficult to use.
Innovation Solution
A stationary blade set with a metal-plastic composite design, featuring a first wall portion made from metal for strength and a second wall portion made from plastic for reduced thickness and comfort, along with an intermediate wall portion for enhanced stiffness and precision, allowing for precise alignment and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a combined shaving and trimming device is used, then both shaving and trimming operations can be performed, but the device becomes heavy and complex
Solution Approach 1:
The blade set is designed to perform both shaving and trimming operations using a single unified structure. The stationary blade and movable cutter blade arrangement with adjustable positioning mechanisms enables the same blade assembly to function for both close-shave operations and lengthier trim operations, eliminating the need for separate specialized devices
Solution Approach 2:
The patent combines the shaving function and trimming function into a single integrated blade set assembly. By merging the cutter blade, stationary blade, and positioning mechanisms into one unified structure, the device achieves dual functionality without requiring separate appliances, thereby reducing overall device complexity and weight
2Adaptability or versatility
If a combined shaving and trimming device is used, then both operations are possible, but the device becomes difficult to use
Solution Approach 1:
The blade set incorporates dynamic positioning mechanisms that allow the cutter blade to be adjusted relative to the stationary blade during operation. This dynamic adjustability enables users to switch between shaving and trimming modes by simply repositioning the cutter blade, making the device easy to operate for both functions without requiring complex mechanisms
3Measurement precision
If separate cutter blades are used for trimming, then trimming precision is achieved, but the blade thickness prevents close shaving
Solution Approach 1:
The cutter blade is designed with dynamic positioning capability that allows it to be adjusted to different positions relative to the stationary blade. For trimming operations, the cutter blade can be positioned to maintain precise toothed edge alignment for accurate length control. For shaving operations, the cutter blade can be repositioned to achieve closer cutting, overcoming the limitation of blade thickness
4Adaptability or versatility
If two separate cutting sections are used in combined devices, then both shaving and trimming are enabled, but manufacturing costs increase
Solution Approach 1:
The patent merges the shaving and trimming cutting sections into a single integrated blade set assembly. By combining both functions into one unified structure with shared components (stationary blade, movable cutter blade, housing), the manufacturing process is simplified, reducing the number of separate parts that need to be manufactured, assembled, and quality-checked, thereby lowering overall manufacturing costs
Data Source
AI summary
A method of manufacturing a blade set (20) of a hair cutting appliance (10) includes forming a stationary blade (22). The stationary blade (22) comprises a first wall portion (100) arranged to serve as a skin facing wall when in operation, a second wall portion (102) at least partially offset from the first wall portion (100), such that the first wall portion (100) and the second wall portion (102) define therebetween a guide slot (96) arranged to receive a movable cutter blade (24), an intermediate wall portion (44) arranged between the first wall portion (100) and the second wall portion (102), and at least one toothed leading edge (30) jointly formed by the first wall portion (100) and the second wall portion (102). The at least one toothed leading edge (30) comprises a plurality of teeth (36), wherein the first wall portion (100) and the second wall portion (102) are connected at a frontal end of the at least one leading edge (30), thereby forming tips (86) of the teeth (36).