Gas Fixing Tool Ignition Control for Shot Quality
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Solution Overview
Problem
Gas-powered fixing tools often produce shots of poor quality due to incomplete filling of the combustion chamber, resulting in partial embedding of nails or staples, caused by the user being too quick in the sequence of bearing the tool against the work surface and activating the trigger.
Innovation Solution
An electronic ignition control device that triggers the shot only if the time between the detection of the tool being pressed against the work surface and the trigger being pulled is greater than a predetermined threshold, ensuring the combustion chamber is sufficiently filled with gas, and also adjusts for temperature parameters to optimize firing conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the user quickly bears the tool against the work surface and activates the trigger, then the operation speed is improved, but the combustion chamber filling time is insufficient resulting in poor shot quality
Solution Approach 1:
The system performs preliminary action by detecting the bearing event and starting the filling process before the trigger is activated. The combustion chamber begins filling with gas as soon as the tool is borne against the work surface, preparing the system in advance for the subsequent firing action. This ensures that when the user quickly pulls the trigger, the chamber is already sufficiently filled, maintaining shot quality while allowing fast operation.
Solution Approach 2:
The system implements feedback by monitoring the time interval between the bearing event and trigger activation. The control unit measures this duration and uses it to determine whether the filling process has been sufficient before allowing ignition. This feedback mechanism ensures that the shot quality requirements are met by preventing firing until the chamber is properly filled, while still permitting rapid operation within the minimum time threshold.
2Manufacturing precision
If the filling time of the combustion chamber is extended to ensure optimal firing conditions, then the shot quality is improved, but the operation time increases
Solution Approach 1:
The system applies partial action by implementing a minimum time threshold for filling rather than requiring excessive filling time. The control unit allows the filling process to proceed for a predetermined minimum duration, which is sufficient to achieve optimal firing conditions without unnecessarily extending the operation time. This balanced approach ensures shot quality while minimizing time loss by avoiding over-filling.
3Reliability
If the minimum filling time threshold is set high to ensure complete chamber filling, then the combustion completeness is improved, but the trigger response delay increases
Solution Approach 1:
The system performs preliminary action by initiating the filling process immediately when the bearing event is detected, before the trigger is activated. This head start in the filling process allows the chamber to accumulate sufficient gas during the minimum time threshold, ensuring complete combustion without requiring an extended delay when the trigger is pulled. The preliminary preparation decouples the filling duration from the trigger response time.
4Ease of operation
If the system allows immediate firing upon trigger activation, then the trigger responsiveness is improved, but the chamber may be insufficiently filled resulting in poor embedding
Solution Approach 1:
The system implements feedback by continuously monitoring the filling duration and comparing it against the minimum time threshold. The control unit only permits ignition when the feedback indicates that sufficient filling has occurred. This feedback mechanism maintains trigger responsiveness by allowing immediate firing when conditions are met, while preventing poor embedding by blocking firing when the chamber is insufficiently filled, thus adapting to actual filling status rather than imposing a fixed delay.
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
Prevents shots of poor quality by ensuring the combustion chamber is fully filled with gas, resulting in reliable and high-quality embedding of fixation elements, while adjusting for temperature variations to maintain optimal firing conditions.
Implementation Method 1
The activation of this trigger by a user results in the generating of an electric arc in the combustion chamber by means of the ignition device
Implementation Method 2
an internal combustion engine for propulsion of a piston driving a fixation element such as a nail or a staple, designed to be anchored in a material composing a work surface. The engine comprises at least one internal combustion chamber adapted to contain a mixture of air and combustible gas whose igniting by an internal ignition device causes the propelling of a piston
Data Source
AI summary
The present disclosure concerns a method and an electronic ignition control device of a combustion chamber of a gas-powered fixing tool designed to optimize the quality of the shooting of fixation elements by the tool. According to the principle of the present disclosure, the triggering of the ignition of the chamber to produce the shot is commanded on the condition that the time between the moment when the user places the tool against a work surface and the moment when he pulls on an actuation trigger of the tool is greater than a predefined delay time, to ensure an optimal filling of the combustion chamber with the combustible gas. According to one embodiment of the present disclosure, the triggering of the ignition is enabled on the supplemental condition that a signal of medium ignition voltage is greater than a trigger threshold voltage.