Removable Comb Unit for Pulling and Pushing Hair Trimming
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Solution Overview
Problem
Existing hair trimmer devices with rotating bladesets are prone to malfunction due to clogging and wear, and require complex mechanisms for position changes, limiting their ability to efficiently perform both pulling and pushing movements for diverse hair removal applications, especially in sensitive and hard-to-reach body zones.
Innovation Solution
A hair trimmer device with a removable comb unit that can be positioned in two different orientations, allowing for either pulling or pushing movements, featuring fins that point in the direction of the movement to ensure efficient hair removal and a compact design for improved accessibility, along with a trimming head that includes cutting and shaving means for multifunctional use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rotating bladeset with multiple cutting edges is used to enable both gross and fine trimming, then trimming versatility is improved, but device complexity increases due to complicated mechanisms for position changes and securing
Solution Approach 1:
The device is divided into separate functional modules: a stationary blade unit and a movable blade unit that can be independently positioned. This segmentation eliminates the need for a complex rotating bladeset mechanism, as each blade unit can be简单地 positioned for either gross or fine trimming without requiring intricate rotation and securing mechanisms.
Solution Approach 2:
Instead of rotating the entire bladeset to change cutting edge orientation, the invention inverts the approach by using a stationary blade unit with a movable blade unit that can be positioned in different locations. This reversal of the traditional rotation mechanism simplifies the overall device structure while maintaining trimming versatility.
2Adaptability or versatility
If a rotating bladeset mechanism is implemented to allow position changes for different trimming modes, then functional adaptability is improved, but reliability decreases due to clogging and wear
Solution Approach 1:
The invention extracts the rotation mechanism from the blade assembly, separating the positioning function from the cutting function. The stationary blade unit remains fixed while the movable blade unit is positioned independently, eliminating the rotating mechanism that is prone to clogging and wear, thereby improving reliability.
Solution Approach 2:
The movable blade unit is designed to be easily repositionable by the user without requiring complex securing mechanisms. This self-service design reduces the number of mechanical components that can fail from clogging or wear, as the positioning system is simplified and does not rely on intricate rotation and locking mechanisms.
3Adaptability or versatility
If a single device is designed to handle both pulling and pushing movements for different body zones, then user satisfaction is improved, but device design complexity increases
Solution Approach 1:
The device achieves universality by incorporating both a stationary blade unit and a movable blade unit that can be positioned for different trimming modes. This multi-functional design allows the same device to handle both pulling and pushing movements for various body zones without requiring multiple separate devices, while the modular blade unit design keeps the overall structure relatively simple.
Data Source
AI summary
To allow trimming body hair by pulling as well as pushing with the same hair trimmer device (1), its comb unit (6) is positioned over the trimming head (16) in at least two different positions (8, 9), one (8) pulling and one pushing position (9). In particular, in the different comb positions (8, 9), the tips (20) of the comb unit's fins (13) point in the direction of the respective movement. Preferably, the comb unit (6) is removably attached. In a preferred embodiment, the trimming head (16) includes shaving means (18) besides trimming means (19).