Grasp-Activated Power Switch Grip for Hands-Free Tattoo Machine Control
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Solution Overview
Problem
Tattoo artists face discomfort and inefficiency when using foot pedals or battery packs to switch on and off the power supply to their tattoo machines, as it requires releasing their placement hand from the customer's skin and assuming awkward postures.
Innovation Solution
A grasp-activated power switch is integrated into the grip of hand-held power tools, allowing operators to switch power on and off by squeezing the grip, thus enabling continuous engagement of the placement hand at the tattooing site without releasing the operating hand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a foot pedal is used to switch power on and off, then the artist's hands are freed from actuating the power switch, but the power cable interferes with freedom of movement and causes discomfort
Solution Approach 1:
The power switch function is extracted from the foot pedal and integrated directly into the grip of the tattoo machine, eliminating the need for the foot pedal and its interfering cable while maintaining hand freedom for operation
2Ease of operation
If the power switch is placed on the battery pack, then freedom of movement is improved by eliminating the tethered power cord, but the artist must release the placement hand from the customer's skin to operate the switch
Solution Approach 1:
The power switch is merged with the grip structure of the tattoo machine, combining the functions of holding the device and controlling power into a single integrated component, allowing simultaneous operation without hand repositioning
3Ease of operation
If the power switch is placed on the battery pack, then the tethered power cord interference is eliminated, but frequent hand repositioning creates unsanitary conditions
Solution Approach 1:
The power switch is merged with the grip structure of the tattoo machine, allowing the placement hand to remain continuously engaged with the customer's skin without breaking sterile technique, while the operating hand controls power through grip activation
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
This solution enhances the comfort and efficiency of tattooing by allowing artists to control the power switch without altering their grip or posture, minimizing the risk of contamination and improving the overall tattooing experience.
Implementation Method 1
The power switch is configured so that a manual grasping force applied to the outer shell causes the outer shell to flex inward, and the inner conductive layer to electrically couple to the outer conductive layer
Data Source
AI summary
A grasp-activated power switch has a switch body, an outer conductive shell covering the switch the body, and a tool body. The switch body has an open-ended channel. An upper and lower conductive band are formed about the inner surface of the channel and are electrically separated from one another. An outer conductive band on the outer surface of the switch body is electrically coupled to the upper band. An outer conductive surface on the outer surface of the switch body is electrically coupled to the lower band. The tool body is electrically separated from the inner surface of the channel and includes a first and a second pin extending inwards. One of the pins is coupled to a motor and the other pin is coupled to a battery so that a manual grasping force applied to the outer shell completes the electrical connection to energize the motor.