Trigger Knife Blade Position Fixing Mechanism
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Solution Overview
Problem
Conventional trigger knives lack an effective mechanism to fix the blade at a preset position within the knife shell, making it difficult to meet usage requirements.
Innovation Solution
A trigger knife design featuring a blade holder, trigger, elastic members, and a limiting mechanism that allows the blade to extend and retract while limiting the trigger's rotation angle, enabling the blade to be fixed at specific preset positions within the knife shell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If only a trigger is used to drive the blade, then the structure is simple, but the blade cannot be fixed at preset positions
Solution Approach 1:
The limiting mechanism is divided into multiple components: limiting plate with limiting grooves, adjusting plate with adjusting grooves, and trigger with fixing parts. Each component has a specific function in controlling blade positions, allowing precise position fixation without requiring a completely complex new mechanism
Solution Approach 2:
The mechanism allows dynamic adjustment between fixed and movable blade positions. The trigger can rotate freely within certain ranges to extend the blade, while also being able to stop at preset positions determined by the limiting mechanism, providing both flexibility and position control
2Measurement precision
If the trigger can rotate freely to extend the blade, then the operation is easy, but the blade position cannot be controlled
Solution Approach 1:
The limiting plate and adjusting plate act as intermediary elements between the trigger and blade holder. They translate the trigger's rotation into controlled blade positions through the limiting grooves and adjusting grooves, providing precise position control while maintaining easy trigger operation
Solution Approach 2:
Multiple preset positions are created by providing multiple limiting grooves and adjusting grooves, allowing the blade to be fixed at several predetermined positions. This copying of position options gives users choice without complicating the operation
3Adaptability or versatility
If the blade can be fixed at preset positions, then usage requirements are met, but the structure becomes more complex
Solution Approach 1:
The limiting mechanism components (limiting plate, adjusting plate, trigger fixing parts) are integrated within the existing knife shell and blade holder structure. The mechanism merges with the trigger assembly, utilizing the trigger's rotation capability rather than adding a separate positioning system, thus minimizing overall structural complexity
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 allows for precise control of the blade's extending length, enhancing safety and usability by ensuring the blade can be locked or extended to specific positions, preventing accidental exposure and improving cutting accuracy.
Implementation Method 1
a first elastic member, configured to drive the blade holder and the blade to move away from the blade outlet, so that the blade is capable of being retracted into the blade outlet
Data Source
AI summary
The present invention discloses a trigger knife with a fixable blade position, including a knife shell, a blade holder, a blade, a first elastic member, a trigger, and a limiting mechanism. The blade holder is capable of moving close to or away from the blade outlet in the inner cavity together with the blade. The trigger is rotatably mounted on the knife shell and configured to drive the blade to extend out of the inner cavity. The first elastic member is configured to drive the blade to be retracted into the inner cavity. The limiting mechanism is configured to limit a rotation angle of the trigger, so that the blade can be fixed to at least one preset position in the inner cavity. In the present invention, the blade can be effectively fixed to the at least one preset position in the inner cavity, which can meet usage requirements.