Dual Holding Mechanism for Liquid Discharge Safety
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Solution Overview
Problem
Existing dispensing devices for pharmaceutical liquids face safety issues due to accidental or intentional strong force impacts causing unwanted transfer of the locking device to the release state before the intended blocking period has expired, leading to potential overdosing.
Innovation Solution
A dual holding device system is implemented, where the locking bar can be manually held in the first position by a second actuating handle, which is more robust and resistant to force impacts, and requires both manual and electrical releases to transition to the release state, with a sensor and display for status indication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a permanent magnet and electromagnet are used for the holding device, then the holding function is effective and the release state can be achieved, but strong force impacts can cause unwanted transfer of the locking device to the release state before the blocking period has expired
Solution Approach 1:
The holding device is segmented into two independent components: a first holding device (permanent magnet) for normal operation and a second holding device (mechanical blocking element) for impact protection. This segmentation allows each component to specialize in its function while collectively providing both effective holding and impact resistance.
Solution Approach 2:
The holding device combines two different holding mechanisms (magnetic holding and mechanical blocking) into a composite system. The permanent magnet provides continuous holding force while the mechanical blocking element provides passive impact resistance, creating a composite holding system that leverages the strengths of both approaches.
2Reliability
If the locking device is designed to be robust against force impacts, then safety against unwanted release is improved, but the device complexity increases due to additional holding members
Solution Approach 1:
The second holding device merges the impact protection function with the existing blocking bar structure. The blocking element is integrated into the mechanical linkage system, serving both as a structural component and as the impact-resistant holding element, thereby avoiding significant increase in overall device complexity.
Solution Approach 2:
The mechanical blocking element of the second holding device provides passive, self-activating protection against impacts. It automatically engages to prevent unwanted release without requiring external control systems, sensors, or additional energy sources, thereby implementing robust protection with minimal added 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 dual holding device system significantly reduces the risk of premature release, ensuring the blocking period is maintained until manually released by the user, thereby preventing overdosing and enhancing safety.
Implementation Method 1
a first holding device with a permanent magnet, the permanent magnet being arranged and designed in such a way that it can hold the locking bar in the first position
Implementation Method 2
the first holding device comprises an electromagnet which, when supplied with sufficient current through the control electronics, applies a force to the locking bolt, which overcomes a holding force of the permanent magnet
Implementation Method 3
the locking bolt is subjected to spring force by a spring device in the direction of the second position
Data Source
Figure 1
Figure 2a~2b
Figure 3a~3b
AI summary
Discharge device for discharging liquids comprising a housing (9), control electronics (18), a liquid reservoir (10), a discharge opening (16), a manually operated conveying device by means of which liquid can be conveyed to the discharge opening, and a locking device (30) which can assume a locking state in which actuation of the conveying device is mechanically blocked, and a release state in which actuation of the conveying device is possible in order to prevent a further discharge process for a locking period after a discharge process, wherein the locking device (30) comprises a locking bolt (40) which is movable relative to the housing (9) between a first and a second position, wherein the locking device (30) is designed such that a movement of the locking bolt (40) from the first position to the second position brings the locking device (30) into the release state.A first holding device (50) is provided, by means of which the locking bolt (40) can be held in the first position against the force of a spring device (42) and which can be released by an electrical signal from the control electronics (18). According to the invention, a second holding device (60) is also provided, by means of which the locking bolt (40) can be held in the first position against the force of the spring device (42) and which can be released by manual actuation.