Trigger-Type Ejector With Rotatable Nozzle Head
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Solution Overview
Problem
Conventional trigger-type ejectors face complexities in assembly due to the need for precise alignment of pressure storage plunger and biasing member within the pressure storage chamber, and switching to an ejection incapable state is cumbersome, often resulting in liquid attachment issues.
Innovation Solution
The design incorporates a pressure storage chamber within the nozzle head, allowing for easy assembly of the pressure storage plunger and biasing member, and features a rotatable nozzle head that can be switched between ejection capable and incapable positions without liquid attachment, using a communication hole and grooves to control ejection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pressure storage chamber is defined and formed between the ejector body and the nozzle head by assembling the nozzle head to the ejector body, then the ejection function is achieved, but the assembly work becomes complicated requiring consistent line alignment
Solution Approach 1:
The pressure storage chamber is formed by nesting the column inside the inner cylinder wall, with the pressure storage plunger moving within the column. This nested configuration allows the pressure storage chamber to be self-contained within the nozzle head assembly, eliminating the need for complex alignment between separate ejector body and nozzle head components.
Solution Approach 2:
The patent combines the pressure storage chamber formation with the nozzle head structure itself, rather than requiring separate assembly between ejector body and nozzle head. The communication hole integrated into the inner cylinder wall and the groove configuration merge the flow path and pressure storage functions into a unified structure that simplifies assembly.
2Ease of operation
If the ejection hole is closed by the lid body provided at the tip of the nozzle head, then the ejector can be switched to ejection incapable state, but liquid may attach to the lid body and finger during operation
Solution Approach 1:
The patent removes the lid body component entirely and replaces it with a groove-based closure mechanism integrated into the inner cylinder wall. The groove configuration allows the column to rotate and block the communication hole without requiring a separate lid body that the user must manually operate, eliminating the harmful effect of liquid attachment to the user's finger.
Solution Approach 2:
The groove structure serves as an intermediary mechanism between the column rotation and the ejection hole closure. Instead of direct contact between the user's finger and liquid during lid operation, the groove mediates the closure action through rotational movement of the column, preventing liquid from reaching the user's finger.
3Adaptability or versatility
If a small lid body is used to close the ejection hole, then the ejection incapable state can be achieved, but the lid body is not easy to handle making operation complex
Solution Approach 1:
The patent replaces the static small lid body with a dynamic rotational mechanism. The column rotates within the inner cylinder wall, with the groove configuration enabling smooth angular movement. This dynamic approach makes the operation more intuitive and easier to handle compared to manipulating a small lid body, while still achieving the ejection incapable state when needed.
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 configuration simplifies assembly and enables easy switching to an ejection incapable state without liquid attachment, improving operational efficiency and user safety.
Implementation Method 1
a biasing member (spring) biasing the pressure storage plunger toward a close position where an ejection hole is closed
Implementation Method 2
the pressure storage plunger opens against a biasing force of the biasing member due to a difference in the cross-sectional areas between the large-diameter pressure receiving portion and the small-diameter pressure receiving portion, and thus the liquid can be ejected at a high pressure
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
Provided is a trigger-type ejector (1, 100) including: a pressure storage chamber (58) defined and formed in a nozzle head (50) and communicating with a flow path (P2) through a communication hole (52f); a pressure storage plunger (53) including a large-diameter pressure receiving portion (53c) and a small-diameter pressure receiving portion (53e) facing an opposite side to the large-diameter pressure receiving portion (53c) and being movable between a close position where an ejection hole (51c) is closed and an open position where the ejection hole (51c) is opened; and a biasing member (54) disposed in the pressure storage chamber (58) and biasing the pressure storage plunger (53) toward the close position, the trigger-type ejector being configured such that, when a pressure of a liquid in the pressure storage chamber (58) becomes equal to or greater than a predetermined value, the pressure storage plunger (53) moves from the close position to the open position against a biasing force of the biasing member (54) and thus a liquid in the pressure storage chamber (58) is ejected from the ejection hole (51c) to the outside.