Air Brush Trigger Assembly Dual-Spring Feedback Control
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Solution Overview
Problem
Current air brush technologies lack precision and user feedback, making it difficult for users to control the release of paint and air flow, leading to uneven applications and requiring significant skill and experience, especially in cosmetic applications.
Innovation Solution
The air brush features a trigger assembly with a spring means comprising two springs of different strengths, providing mechanical feedback to the user through distinct pressure sensations, allowing separate control of air flow and paint release, and preventing bursts of ink or dye application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single action mechanism is used, then the device complexity is reduced, but the manufacturing precision and control over paint release is limited
Solution Approach 1:
The trigger mechanism is segmented into two independent levers: a first lever (38) that controls air flow release and a second lever (42) that controls paint release. This segmentation allows each lever to be optimized for its specific function, providing precise control over paint release while maintaining relatively simple device complexity. The separate control paths enable independent adjustment of air and paint parameters.
Solution Approach 2:
The invention adds a dimensional aspect to the trigger control by introducing a second lever that operates independently from the first lever. Instead of a single linear trigger movement, the user can now control two dimensions of operation: air flow (first lever) and paint release (second lever). This dimensional expansion provides finer control precision without significantly increasing overall device complexity.
2Manufacturing precision
If a double action mechanism is used, then the control precision over air and paint release is improved, but the device complexity increases
Solution Approach 1:
The double action mechanism is implemented through segmentation of the trigger assembly into distinct functional components: a first lever (38) with associated spring (45) for air control, and a second lever (42) with associated spring (50) for paint control. Each segment is mechanically simple but provides precise control when combined, reducing the overall complexity compared to a fully integrated double-action system.
Solution Approach 2:
The trigger mechanism incorporates dynamic elements including springs (45, 50) that provide responsive feedback and automatic return to neutral positions. The levers can be independently actuated in different sequences and combinations, providing dynamic control flexibility. This dynamic design allows precise control without requiring complex mechanical linkages.
3Ease of operation
If no mechanical feedback is provided, then the ease of operation is improved, but the measurement precision of user input is reduced
Solution Approach 1:
The trigger assembly incorporates mechanical feedback through springs (45, 50) that provide tactile resistance and positional feedback to the user. When the first lever (38) is actuated, spring (45) provides feedback on air flow initiation. When the second lever (42) is actuated, spring (50) provides feedback on paint release initiation. This feedback mechanism enables users to precisely control the timing and amount of paint and air release while maintaining ease of operation through simple lever movements.
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 design enhances precision and ease of use by providing biofeedback, allowing users to control the release of contents and air flow more accurately, reducing uneven applications and making the air brush easier to master.
Implementation Method 1
The air brush uses nebulization of ink or dye to disperse an even coat of this paint or pigment on a surface. Typically, the air brush is a small hand-held tool, operated by compressed air. A stream of compressed air passes through a venturi, creating a suction force that pulls the dye or pigment from an adjacent location. The venturi reduces air pressure, creating the suction on the adjacent location, and the high speed of the air breaks the paint or pigment into small particles.
Data Source
AI summary
An embodiment of the present invention is an air brush including a housing, a head assembly, and a trigger assembly. The housing has a main body with an air valve, reservoir and a handle. The head assembly mounts to the main body with a nozzle, nozzle cap, and a needle cap. The trigger assembly fits within the housing and includes a needle engaging the head assembly, a needle chucking guide, a needle chucking nut, a lever assembly, a spring guide and a spring device. The lever assembly actuates the needle to release compressed air and contents of the reservoir. The spring device controls release of the contents relative to the air flow through the air valve and nozzle. The spring device includes a first spring, a second spring, and a ring member. The ring member is positioned between the springs, and the springs have different strengths.