Manual Nose Hair Clipper with Rounded Guide and Discharge Hole
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Solution Overview
Problem
Existing nose hair clippers are uncomfortable to use, prone to malfunction, and unhygienic, with irregularly growing nose hairs being difficult to cut efficiently, leading to discomfort and bacterial growth due to poor design and frequent cleaning issues.
Innovation Solution
A nose hair clipper with optimally designed external and internal cutting portions on cylindrical bodies, featuring rounded leading ends and slits for easy hair introduction, and an auxiliary cap with a brush and driver for improved usability and hygiene, where the internal cylindrical body is rotated relative to the external cylindrical body to cut nose hairs efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a motor-driven device rotates a cutting edge to cut nose hair, then cutting automation is improved, but reliability deteriorates due to frequent malfunctioning and battery replacement
Solution Approach 1:
The patent replaces the motor-driven mechanical system with a manual operation system. The user directly rotates the internal cylindrical body through finger engagement surfaces, eliminating the motor, battery, and drive mechanism. This substitution resolves the contradiction by removing the automated motor system (reducing automation extent) while simultaneously eliminating malfunction and battery issues (improving reliability).
Solution Approach 2:
The device enables self-service operation where the user's finger directly rotates the cutting mechanism without external power sources. The internal cylindrical body is designed with finger engagement surfaces that allow the user to manually rotate it, making the system self-powered and eliminating dependency on motors and batteries, thereby improving reliability while maintaining operational automation through direct user control.
2Ease of operation
If the cutting edge is rotated with a spring rotational force, then ease of operation is improved, but device complexity increases making it difficult to apply in real life
Solution Approach 1:
The patent extracts and removes the spring mechanism from the device. Instead of using a spring to provide rotational force, the design relies on direct manual rotation by the user through finger engagement surfaces on the internal cylindrical body. This extraction eliminates the spring component and its associated complexity while maintaining ease of operation through intuitive manual control.
3Productivity
If nose hairs are introduced into the hollow portion of the clipper, then cutting capability is improved, but hygiene deteriorates due to bacterial growth and odor
Solution Approach 1:
The patent converts the potential harm of hair accumulation into a benefit by designing the hollow portion with a discharge hole that allows easy removal of cut hairs. The structure transforms the hollow space from a trap for bacteria into a temporary holding area with convenient egress, enabling users to easily empty the container and preventing bacterial growth while maintaining cutting capability.
Solution Approach 2:
The design facilitates discarding of cut hairs through the discharge hole in the hollow portion. Users can easily remove accumulated hairs from the container, preventing bacterial growth and odor. This regular discarding mechanism maintains hygiene while preserving the cutting functionality that requires hair collection in the hollow space.
4Manufacturing precision
If the upper leading end of the external cylindrical body is flat, then manufacturing precision is improved, but ease of operation worsens as nose hairs are difficult to introduce
Solution Approach 1:
The patent applies curvature by forming a rounded portion at the upper leading end of the external cylindrical body instead of a flat surface. This rounded shape facilitates the introduction of nose hairs into the cutting area by guiding them smoothly toward the cutting edges. The curved geometry maintains manufacturability through standard forming processes while significantly improving ease of operation.
Data Source
AI summary
A nose hair clipper including a stationary external cylindrical body, having an external cutting portion with a plurality of first cutting edges, a plurality of first slits, and a plurality of rounded portions; a rotatable internal cylindrical body, having an internal cutting portion with a plurality of second cutting edges and a plurality of second slits, a convex portion, and a circumferential concave groove, the rotatable internal cylindrical body being inserted into the stationary external cylindrical body, and the plurality of rounded portions of the external cutting portion extending upward to be higher than an upper end of the internal cutting portion by a to predetermined gap; a bolt, screwed into the circumferential concave groove; a handling body, combined with a lower end of the rotatable internal cylindrical body; and an auxiliary cap with a brush and a driver, connected to a lower end of the handling body.