Rotating Locking Cap for Tattoo Machine Power Control
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Solution Overview
Problem
Existing tattoo machines lack a convenient and secure method for turning the device on and off, which can lead to accidental activation or battery drain.
Innovation Solution
The tattoo machine incorporates a detachable locking cap with a proximal first ring, a middle second ring, and a distal convex portion, allowing the user to rotate the cap clockwise to turn the machine on and counter-clockwise to turn it off, with a secure tab and notch mechanism for attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional power switch is used, then the device can be turned on and off, but it is prone to accidental activation and lacks secure control
Solution Approach 1:
The power control mechanism transitions from a static switch to a dynamic rotating locking cap system. The locking cap must be rotated in a specific direction (clockwise to engage, counter-clockwise to disengage) to change the electrical connection state, providing secure control while maintaining ease of operation through simple rotational motion.
Solution Approach 2:
The locking cap acts as an intermediary element between the user and the power circuit. It mechanically mediates the electrical connection between the battery and motor through its rotation, which moves the electrical contact between contact areas (power on) and non-contact areas (power off) on the contact plate, preventing direct and accidental activation.
2Duration of action of stationary object
If the battery is permanently installed, then power supply is continuous, but battery management and replacement become difficult
Solution Approach 1:
The battery housing is segmented into a removable battery component and a stationary housing structure. The locking cap mechanism facilitates this segmentation by securing the battery in place during operation and enabling easy removal when replacement is needed, thus maintaining continuous power supply during use while simplifying battery management.
3Reliability
If a simple power switch is used, then the device structure remains simple, but accidental activation cannot be prevented
Solution Approach 1:
The locking cap features asymmetric engagement with the battery housing through tabs that fit into notches. This asymmetric design requires a specific rotational direction to engage or disengage, preventing accidental activation while adding minimal complexity to the overall device structure.
Solution Approach 2:
The locking cap must be deliberately rotated in a specific direction before power can be activated or deactivated. This preliminary rotational action serves as a deliberate user intent signal, preventing accidental activation while maintaining a relatively simple mechanical structure without complex electronics or multiple components.
Data Source
AI summary
A tattoo machine with a three-way electrical disconnect is disclosed. The tattoo machine includes a tattoo machine housing, which further includes a grip section that houses a motor and a battery housing that houses a battery that powers the motor. The battery housing section has a detachable locking cap, which houses a contact plate. The tattoo machine also includes an electrical contact housed within a distal portion of the battery housing that engages with the contact plate in the locking cap when the locking cap is attached to the battery housing. The tattoo machine is turned on by rotating the locking cap in a clockwise direction and turned off by rotating the locking cap in a counter-clockwise direction.