Nail Gun Trigger Mode Switching Mechanism
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Solution Overview
Problem
Conventional trigger structures for nail guns are prone to unexpected mode switching during use, potentially leading to accidents, and may require two hands to operate, which is a regulatory requirement in some countries, complicating user safety and convenience.
Innovation Solution
A trigger structure with a trigger member, switching member, and spring mechanism that allows users to switch between one shoot mode, repeat shoot mode, and safe mode using a combination of pivotal holes, protrusions, and a fixing rod, enabling safe and convenient operation with clear mode indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional switching lever rotating on a plate is used, then the trigger structure can switch between one shoot mode and repeat shoot mode, but the switching lever may be unexpectedly switched by the user during busy work, leading to safety hazards
Solution Approach 1:
The patent introduces an adjusting member as an intermediary between the user's hand and the trigger plate. This adjusting member must be deliberately manipulated to change the trigger plate's position, preventing accidental mode switching while still allowing intentional changes. The intermediary mechanism ensures that mode switching requires conscious user action rather than unintended contact.
Solution Approach 2:
The trigger structure allows the user to independently adjust the mode by manipulating the adjusting member with one hand while maintaining control of the trigger with the other hand. The system serves itself by providing clear visual indicators (protrusions aligning with markings) that guide the user to the correct position without requiring complex procedures or two-handed operation for switching.
2Adaptability or versatility
If a conventional switching lever is used, then mode switching is possible, but two hands are required to switch and operate the nail gun, which complicates operation and may not meet regulatory requirements
Solution Approach 1:
The patent divides the operation into two independent functions: the trigger plate controls firing, while the adjusting member controls mode switching. This segmentation allows one hand to operate the trigger while the other hand adjusts the mode, or alternatively, allows mode adjustment without requiring the trigger hand to release. The segmented design provides flexibility to meet different regulatory requirements and user preferences.
Solution Approach 2:
The adjusting member can be dynamically positioned at different locations (first position for repeat mode, second position for one-shot mode) while the trigger remains functional. This dynamic adjustment capability allows the system to adapt between different operational modes without requiring complete disassembly or complex two-handed procedures, enhancing both compliance and ease of operation.
3Reliability
If the adjusting member is pushed from the first pivotal hole to the recess, then the trigger plate moves to the second position for one shoot mode, but the spring must be compressed and the adjusting member must be precisely positioned above the two protrusions
Solution Approach 1:
The patent uses visual indicators (protrusions on the adjusting member that align with markings on the trigger member) to indicate the current mode. This visual feedback system guides the user to the correct position without requiring complex procedures. The protrusions act as physical guides that naturally align with the correct position when the spring pushes the adjusting member into place, simplifying the switching process while maintaining accuracy.
Solution Approach 2:
The spring automatically pushes the adjusting member to align the protrusions with the markings on the trigger member, providing self-alignment and self-indication of the current mode. This eliminates the need for complex alignment procedures or precise manual positioning by the user. The system serves itself by providing clear visual feedback and automatic positioning assistance through the spring mechanism.
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 solution provides a safe and intuitive mode-switching mechanism that prevents accidental triggering, allows single-handed operation for mode changes, and includes a safe mode to prevent unintended firing, enhancing user safety and compliance with regulatory requirements.
Implementation Method 1
a spring placed on the adjusting member and located between the pivotal member and the trigger member; after the spring is recovering, the adjusting member is abutted against the two protrusions
Data Source
AI summary
A trigger structure for switching one shoot mode or repeat shoot mode includes a trigger member and a switching member. The trigger member has a recess defined laterally. Two protrusions are defined in the inner wall of the recess. The switching member has an adjusting member and a trigger plate. Under this arrangement, when the adjusting member is pressed into the recess, the trigger plate is at one position to allow the trigger to shoot in a repeat shoot mode; when the adjusting member is turned to abut against the two protrusions, the trigger plate is at another position to allow the trigger to shoot in a one shoot mode.