Interface for attaching a brush to a skin treatment device
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Solution Overview
Problem
Existing skin treatment devices, such as electric makeup brushes, have components like motors and gearing mechanisms with longer service lives than the brush heads, which are often worn and contaminated, and typically require different speeds and amplitudes for various applications, limiting their versatility and the need for interchangeable brush heads.
Innovation Solution
A skin treatment device with a drive unit and a hood that allows for detachable brush attachment via protrusions and a gearing mechanism, which translates the drive pin's movement into a smaller amplitude suitable for the brush, enabling the brush to be easily replaced and adapted for different skin treatment applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a detachable brush head design is used, then brush replacement is enabled and contamination is reduced, but device complexity increases due to additional attachment mechanisms
Solution Approach 1:
The device is divided into separable components: a reusable handle housing containing the motor and a replaceable brush head assembly. This segmentation allows the brush to be detached and replaced independently from the expensive motor components, enabling brush replacement while maintaining a relatively simple overall structure through standardized connection interfaces.
Solution Approach 2:
The handle housing with motor is designed as a universal base that can accommodate different brush head types through a standardized attachment interface. This universality allows multiple brush heads to be used with a single handle, providing versatility without requiring complex device-specific attachment mechanisms for each brush type.
2Manufacturing precision
If different speeds and amplitudes are tailored for various skin treatment applications, then treatment precision is improved, but device complexity increases due to multiple drive units
Solution Approach 1:
The brush head assembly incorporates a gearing mechanism that enables dynamic adjustment of movement characteristics. The gears can be configured to provide different speed ratios and oscillation amplitudes, allowing the same motor to achieve multiple treatment modes (different speeds and amplitudes) through mechanical configuration rather than requiring multiple separate drive units.
Solution Approach 2:
The gearing mechanism allows changing the operational parameters (speed and amplitude) of the brush by altering the gear configuration. Different gear ratios can be selected to modify the output characteristics of the motor, enabling the device to adapt to various skin treatment requirements without adding complexity through multiple motors.
3Adaptability or versatility
If a gearing mechanism is added to translate drive pin movement, then brush movement adaptation is improved, but device complexity increases
Solution Approach 1:
The gearing mechanism is nested within the brush head assembly rather than being a separate external component. This integration allows the gears to be housed compactly within the brush head structure, providing movement adaptation functionality while minimizing the increase in overall device complexity and maintaining a compact form factor.
Data Source
AI summary
The present invention is concerned with a skin treatment device and an interface for, preferably detachably, attaching a brush to a skin treatment device, wherein the skin treatment device comprises a drive unit, a component part driven by the drive unit to perform a rotatory and/or oscillating movement and a hood at least partially encasing said driven component part. One of said brush and said driven component part comprises at least two protrusions which both extend through openings in the hood when the brush is attached to the skin treatment device. At least one of said protrusions engages the other of said brush and said driven component part by snap fit when the brush is attached to the skin treatment device.