Epilation Spring With Nested Handles For One-Handed Hair Removal
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Solution Overview
Problem
Existing epilating springs are cumbersome and imprecise due to their design requiring two hands to operate and pinching the skin when compressed, making them inefficient for removing short hair.
Innovation Solution
The epilating spring features handles with a diameter adapted to the helical spring, allowing the depilation area to be placed parallel to the skin and operated with one hand, with handles compressing axially to clamp hair between spring coils without pinching the skin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the handles are designed to be larger in diameter than the helical spring to be slipped onto its ends, then the handles can be attached to the spring element, but the depilation spring cannot adequately remove short hair and the spring element must be compressed which can pinch the skin
Solution Approach 1:
The handle is designed with a hollow interior that receives and accommodates the spring element, creating a nested structure where the spring element is inserted into the handle's hollow space. This allows the handle diameter to be larger than the spring element diameter while maintaining effective depilation function, as the spring element operates within the handle's hollow cavity rather than requiring the handle to be slipped over the spring ends.
2Productivity
If the spring element is compressed to remove hair, then hair can be pinched between spring coils, but the skin can also be pinched
Solution Approach 1:
The handle serves as an intermediary structure between the user's fingers and the spring element. When the user compresses the handles, the force is transmitted through the handle walls to the spring element, which then compresses to pinch the hair. The handle acts as a mediator that directs the compressive force specifically to the spring coils where hair pinching occurs, while the handle's structural integrity prevents direct skin contact and pinching during compression.
3Ease of operation
If the spring coils are spaced apart in the unloaded state, then hair can protrude into free spaces between coils, but the depilation spring requires two hands to bring handles into U-shape operation
Solution Approach 1:
Instead of requiring the user to bend the spring element into a U-shape to create free spaces between coils (as in prior art), the invention inverts the approach by designing the handle with a hollow interior that inherently provides the necessary space. The spring element is inserted into this hollow handle, and the handle's hollow structure automatically maintains the appropriate spacing between spring coils, eliminating the need for manual U-shape formation and reducing operation to a simple single-handed compression motion.
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 simple, precise, and faster hair removal with reduced risk of skin pinching, allowing for easy operation with one hand or two fingers, improving user safety and efficiency.
Implementation Method 1
a spring element (10), which has a central axis (M) and is designed as a helical spring
Data Source
Figure 1~2
Figure 3~4
Figure 5a~5c
AI summary
The invention relates to an epilation spring for hair removal, said epilation spring having a spring element (10) that has a central axis (M). A handle (20, 22) is provided at each end (16, 18) of said spring element, and the spring element has an epilation region (14) with a plurality of spring sub-regions, in particular spring coils (12), between which hair (34) to be removed can be pinched. The spring sub-regions, in particular the spring coils (12), are spaced from one another in the epilation region (14) when the spring element (10) is in the unstressed state, and hair (34) can be pinched between the spring sub-regions, in particular the spring coils (12), when the spring element (10) is pressed together in an axial direction by means of the handles (20, 22).