Trigger-Type Liquid Sprayer With Plunger Cylinder for Continuous Discharge
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Solution Overview
Problem
Existing trigger-type liquid ejectors discharge liquid only when the trigger is pulled, making it inconvenient for wide-area spraying, as repeated trigger operation is necessary, which can be time-consuming and inefficient.
Innovation Solution
A trigger-type liquid ejector design that includes a vertical supply pipe, an ejection barrel, a trigger mechanism, a cylinder with a plunger, and a communication hole allowing continuous liquid discharge by storing liquid in the cylinder during trigger operation and releasing it when the trigger is not pulled, enabling uninterrupted flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If liquid is discharged only when the trigger is pulled, then the trigger mechanism is simple, but continuous liquid discharge is not achieved and repeated trigger operation is required
Solution Approach 1:
The cylinder accumulates liquid in advance during the trigger pull phase, so that when the trigger is released, the stored liquid can be discharged automatically without requiring another trigger pull. This preliminary accumulation action enables continuous discharge and improves productivity while maintaining simple operation.
Solution Approach 2:
The system ensures continuous liquid discharge by combining the trigger-activated ejection phase with an automatic discharge phase. The cylinder continuously supplies liquid to the ejection barrel, and the communication hole ensures that liquid flows continuously from the cylinder to the ejection hole even when the trigger is not pulled, eliminating idle time and maintaining productive action.
2Productivity
If a cylinder with plunger and communication hole is added, then continuous liquid discharge is achieved, but the device structure becomes more complex
Solution Approach 1:
The cylinder serves multiple functions: it acts as a liquid storage chamber, an accumulation chamber for pressurization, and an automatic discharge mechanism through the communication hole. The plunger both seals the communication hole during trigger operation and allows automatic discharge when triggered, reducing the need for separate components and minimizing overall device complexity while achieving continuous discharge.
3Reliability
If the plunger blocks the communication hole at most-forward position, then liquid discharge is controlled precisely, but the device complexity increases
Solution Approach 1:
The plunger automatically blocks and unblocks the communication hole based on its own position in the cylinder, controlled by the pressure differential and trigger mechanism. When the trigger is pulled, the plunger moves to the most-forward position and blocks the communication hole, preventing leakage. When the trigger is released, the plunger returns and opens the communication hole for automatic discharge. This self-regulating mechanism ensures reliable liquid control without requiring additional control components, maintaining simplicity while achieving precise discharge control.
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
Enables continuous liquid discharge both during and between trigger pulls, improving efficiency and convenience by allowing liquid to be sprayed over a wide area without repeated trigger activation, with enhanced operability and pressure control.
Implementation Method 1
the plunger is configured to block the communication hole at a most-forward position thereof and to open the communication hole by moving rearward from the most-forward position
Implementation Method 2
the trigger mechanism being configured to lead the liquid from the internal area of the vertical supply pipe into the ejection barrel in accordance with rearward movement of the trigger
Implementation Method 3
the trigger mechanism being configured to... eject the liquid from the internal area of the ejection barrel toward the ejection hole
Data Source
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AI summary
A trigger-type liquid ejector (1) includes: an ejector main body (2); and a nozzle member (3) provided with an ejection hole (4). The ejector main body includes: a vertical supply pipe (10) for sucking up liquid; an ejection barrel (11) communicating with the inside of the vertical supply pipe; and a trigger mechanism (50) including a trigger (51), the trigger being arranged so as to be movable rearward in a state of receiving forward force, and the trigger mechanism being configured to lead liquid from the vertical supply pipe into the ejection barrel in accordance with rearward movement of the trigger and to eject the liquid from the ejection barrel. The nozzle member is provided with: a cylinder (90) communicating with the inside of the ejection barrel through a supply hole; a plunger (91) accommodated in the cylinder so as to be movable rearward in a state of receiving forward force; and a communication hole (104) allowing the inside of the cylinder and the ejection hole to communicate with each other.