Auto-Injecting Device With Detachable Spring Actuator
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Solution Overview
Problem
Existing injectors are difficult for non-professionals to operate, pose a risk of needle injury, and are often complex, costly, and wasteful, with tight caps that are hard to remove, especially for the elderly, and lack clear injection status indicators.
Innovation Solution
An auto-injecting device with an actuating part and receiving part that are detachably connected, featuring an accumulator, trigger mechanism, and moving member to facilitate automatic injection, including a spring for energy accumulation, guiding strips and grooves, and a needle shield for safety, with adjustable penetration depth and cap removal mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an existing auxiliary tool is used to assist drug injection, then the injection operation can be assisted, but the structure becomes complicated and the operation becomes complicated
Solution Approach 1:
The device is divided into a receiving part (housing with receiving cavity) and an actuating part (plunger assembly), which are detachably connected. This segmentation allows each part to have a specific function while keeping the overall structure simple and manageable for non-professionals to operate.
Solution Approach 2:
The actuating part serves multiple functions: it acts as both a plunger to push the plunger rod and an energy storage device through the spring mechanism. The spring can be pre-compressed to store energy, which then automatically drives the injection process, combining manual operation with automatic actuation in a single component.
2Ease of operation
If an existing auxiliary tool is used, then injection assistance is provided, but the cost is high due to single-use limitation
Solution Approach 1:
The design allows the actuating part to be separated from the receiving part after use. The receiving part with the injector can be discarded as a single-use component, while the actuating part with the spring can be reset and reused for subsequent injections, reducing overall cost and waste.
Solution Approach 2:
The spring's energy state can be changed between compressed (energy stored) and released (energy discharged) states, allowing the same physical component to be reset and reused multiple times, transforming it from a single-use to a reusable element.
3Ease of operation
If an existing auxiliary tool is used, then injection assistance is provided, but accidental operation may occur leading to drug waste
Solution Approach 1:
The spring is pre-compressed to store energy before use, but the actuating part includes a blocking mechanism that prevents premature release. The plunger rod is blocked in the receiving cavity until the correct moment, preventing accidental injection while ensuring ready-to-go functionality.
Solution Approach 2:
The spring is pre-compressed and energy is stored in advance, and the plunger rod is positioned and blocked in advance within the receiving cavity. This preliminary preparation ensures that when activation occurs, the injection proceeds immediately and completely, preventing partial or accidental operations.
4Reliability
If a prefilled syringe is used, then the cap is secure, but the cap is too tight to be removed by hand especially for the elderly
Solution Approach 1:
The device separates the cap removal function from the main injection function. The receiving part has a specific cavity structure that accommodates the prefilled syringe, and the actuating part can be used to leverage or pry off the tight cap, making removal easier for elderly users without compromising cap security during storage.
Solution Approach 2:
The receiving cavity acts as an intermediary structure between the tight cap and the user's hand. It provides mechanical advantage and leverage points that allow the user to remove the secure cap with minimal effort, while the cap remains securely attached to the injector body during normal handling.
5Ease of operation
If an auxiliary tool is used, then injection assistance is provided, but the injection status is not clearly shown to the operator
Solution Approach 1:
The device incorporates visual indicators such as color-coded markings or transparent sections on the receiving part that change or become visible during the injection process. For example, the receiving cavity may have transparent walls allowing the user to see the plunger rod's position, or color rings that indicate different injection stages, providing clear feedback without complicating the device.
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 automatic drug injection, reduces the risk of needle injury, is reusable, and simplifies operation, allowing self-administration by non-professionals with clear injection status indicators and easy cap removal.
Implementation Method 1
the accumulator is configured as a spring, which is arranged between the support and the moving member
Implementation Method 2
an accumulator being capable of accumulating energy and capable of releasing the accumulated energy
Data Source
AI summary
The present invention relates to an auto-injecting device for an injector. characterized in that the auto-injecting device comprises an actuating part for actuating the injector and a receiving part for receiving the injector. the actuating part and the receiving part being detachably connected to one other, wherein the actuating part includes: an accumulator being capable of accumulating energy and capable of releasing the accumulated energy: a trigger mechanism for triggering the energy release of the accumulator: and a moving member being capable of moving towards the receiving part when the accumulator releases energy and thus actuating the injector in the receiving part to perform an automatic injection process. The auto-injecting device is capable of, for example, realizing automatic injection of drug in the injector.