Adjustable Hair Trimming Device Locking Mechanism
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Solution Overview
Problem
Existing hair trimming devices face challenges in achieving precise hair length due to the need for multiple interchangeable combs and the difficulty in accurately determining trimming length with adjustable combs.
Innovation Solution
A hair trimming device with an adjustable cutting guide and a locking unit comprising first and second locking elements that can alternate between receiving recesses, allowing for twice the number of discrete locking positions and providing tactile feedback for precise alignment, enabling accurate control of cutting length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If interchangeable combs are used to achieve different hair lengths, then hair length variety is improved, but device complexity increases
Solution Approach 1:
A single comb is designed with multiple receiving recesses at different positions, allowing one comb to provide multiple discrete cutting lengths. The locking unit with multiple locking elements can lock the comb at different positions corresponding to different hair lengths, eliminating the need for multiple interchangeable combs while maintaining versatility.
Solution Approach 2:
The comb is segmented into multiple functional zones with receiving recesses at different positions along its length. Each receiving recess corresponds to a specific locking position that determines a different cutting length, allowing the single comb to perform multiple functions that previously required multiple combs.
2Adaptability or versatility
If an adjustable comb is used to provide variable cutting length, then adaptability is improved, but measurement precision deteriorates
Solution Approach 1:
The comb is pre-configured with receiving recesses at specific positions that correspond to predetermined cutting lengths. The locking unit is designed with locking elements that engage with these pre-positioned recesses, ensuring that the comb can only be locked at specific, accurate positions rather than arbitrary positions, thereby maintaining measurement precision.
Solution Approach 2:
The locking mechanism provides tactile feedback when the locking elements engage with the receiving recesses, indicating to the user that the comb has been locked at a precise position. This mechanical feedback system ensures accurate positioning without requiring complex measurement tools.
3Measurement precision
If the number of locking positions is increased to improve precision, then measurement precision is improved, but device complexity increases
Solution Approach 1:
Multiple locking elements are integrated into a single locking unit that operates together with the comb's receiving recesses. The locking elements are arranged to engage with different receiving recesses at different positions, allowing multiple locking positions to be achieved through a unified locking mechanism rather than separate mechanisms for each position.
Data Source
AI summary
The present application relates to a hair trimming device (10). The hair trimming device has a body (11) with a cutting blade assembly (20). A cutting guide (40) is provided on the body and the position of the cutting guide is adjustable relative to the cutting blade assembly to provide a cutting distance from a user's skin to enable hair to be cut to a desired length. A locking unit (60) is also provided to lock the cutting guide at a desired position relative to the cutting blade assembly. The locking unit comprises a first locking element (64), a second locking element (65) and at least one receiving recess (83). The first and second locking elements are alternately locatable in the or one of the receiving recesses when the position of the cutting guide is adjusted relative to the cutting blade assembly to lock the cutting guide at different positions.