Needleless Syringe Mechanical Interlock Prevents Unintended Discharge
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Solution Overview
Problem
Conventional needleless syringes risk unintended discharge of injection solutions due to independent preparatory and discharge execution operations, which can lead to incorrect positioning of the discharge port relative to the injection target area, potentially causing unintended injection.
Innovation Solution
A needleless syringe design that incorporates a protruding member movable between two positions, ensuring the discharge port is aligned with the injection target area before discharge energy is applied, mechanically correlating preparatory and discharge operations to prevent unintended discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the preparatory operation and discharge execution operation are performed independently, then the ease of operation is improved, but the reliability deteriorates due to risk of unintended discharge
Solution Approach 1:
The patent merges the preparatory operation and discharge execution operation into a single integrated action. The protruding member must be moved to the second position (preparatory operation) which simultaneously enables the power source circuit to apply voltage to the driving unit (discharge execution operation). This integration ensures that discharge can only occur when the discharge port is correctly positioned against the injection target area, eliminating the risk of unintended discharge while maintaining operational simplicity.
2Adaptability or versatility
If the discharge port is not necessarily brought in contact with the injection target area during use, then the adaptability is improved, but the harmful factors increase due to possibility of erroneous discharge
Solution Approach 1:
The patent implements preliminary action by requiring the protruding member to be moved to the second position, which brings the discharge port into contact with the injection target area, before the discharge execution operation can be performed. This preliminary positioning action ensures that the discharge port is correctly aligned with the target area before any discharge energy is applied, preventing erroneous discharge while maintaining the adaptability of the device for different injection scenarios.
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 syringe design ensures that discharge execution is only permitted when the discharge port is correctly positioned against the injection target area, thereby preventing unintended injection and ensuring accurate delivery of the injection substance.
Implementation Method 1
a driving unit which is operated when a voltage is applied to generate discharge energy in order to discharge the injection objective substance accommodated in the accommodating unit
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
A needleless syringe for injecting an injection objective substance into an injection target area by discharging the injection objective substance by a voltage application to a driving unit without using any injection needle comprises a protruding member which is provided movably from a first position at which a forward end thereof protrudes from an end surface of a housing to a second position at which a protruding length of the forward end from the end surface of the housing is shorter than a protruding length provided at the first position and the forward end and a discharge port can be brought in contact with the injection target area; a maintaining mechanism which maintains the protruding member at the first position before the discharge energy is generated by the driving unit; and a power source circuit which applies a voltage to the driving unit when the protruding member having been maintained at the first position is moved to the second position by means of a pressing force received by the forward end of the protruding member. Accordingly, the unintended discharge from the syringe is appropriately avoided.