Movable Wall Nail Drawing Device with Fluid Presser
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Solution Overview
Problem
Conventional drawing devices for nail designs on fingernails often result in the nail contacting the inner surfaces of the device when removed, potentially damaging the design due to insufficient space between the finger and the device's inner walls after drawing is complete.
Innovation Solution
A drawing device with a holding case and a presser that applies pressure using a fluid, allowing the device's walls to expand and create more space when the presser is deflated, facilitating easy insertion and removal of the finger without nail contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a pressing force is applied by a finger presser to the bottom side of the finger to press the finger upwards such that the portions of the top side of the finger other than the nail are pressed into the upper wall of the finger insertion opening, then the finger is prevented from moving during drawing, but the space between the top side of the finger and the upper wall of the finger insertion opening becomes small, making the nail prone to contacting the inner surface when the finger is removed
Solution Approach 1:
The holding case is designed with movable walls that can dynamically adjust their position. The first wall can move in the first direction and the second wall can move in the second direction, allowing the internal volume to change between a compressed state during drawing and an expanded state during finger insertion/removal, thus resolving the contradiction between finger stability and space availability
Solution Approach 2:
The physical state of the holding case walls is changed between different operational phases. During drawing, the walls are in a compressed position to stabilize the finger. During insertion/removal, the walls move to expand the internal volume, creating sufficient space to prevent nail contact while maintaining finger stability during the drawing process
2Manufacturing precision
If the finger is pressed into the upper wall of the finger insertion opening to prevent movement during drawing, then drawing precision is improved, but the nail is prone to contacting and damaging the inner surface when the finger is removed
Solution Approach 1:
The holding case employs dynamic wall movement to transition between a constrained state during drawing (ensuring precision) and an expanded state during finger removal (preventing damage). The movable walls adapt the internal space based on the operational phase, eliminating the harmful contact risk while maintaining drawing precision
Solution Approach 2:
The holding case is designed with movable walls that can be positioned in advance to create sufficient space before finger insertion and after drawing completion. This preliminary configuration prevents nail contact with the inner surface during removal, while still allowing the finger to be pressed into the upper wall during drawing for precision
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
The expanded space reduces the likelihood of the nail contacting the inner surfaces during removal, preventing damage to the nail design and ensuring a clean, intact design after drawing.
Implementation Method 1
a presser that applies pressure between the holding case and the finger or toe by receiving a fluid and that stops applying pressure to the finger or toe by discharging the fluid
Implementation Method 2
at least one of the walls of the holding case is configured to move so as to expand a space between the holding case and the finger or toe
Data Source
AI summary
A drawing device includes: a finger holding case including a plurality of walls (a bottom wall, left and right sidewalls, a rear wall, and a top wall) surrounding a finger insertion opening into which a finger having a nail to be drawn on is inserted as well as an opening exposing the nail and a finger presser to which a fluid is supplied in order prevent movement of the finger by applying pressure between the finger and the finger holding case and from which the fluid is discharged to stop applying pressure. When the finger presser is not preventing movement of the finger, one of the walls (the top wall or the bottom wall) of the finger holding case moves in order to expand a space between the finger holding case and the finger.