Injection Device Proximal End Cap Prevents Accidental Actuation
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Solution Overview
Problem
Current injection devices lack mechanisms to prevent accidental actuation and ensure safe, controlled delivery of medications, particularly for self-administration by patients who may be needle-averse.
Innovation Solution
An automatic injection device with a syringe carrier, housing, and proximal end cap configuration that prevents premature actuation, combined with a drive mechanism and intermediate member for selective force transmission, and a shroud deployment system that integrates with the drive means to facilitate safe and controlled medication delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional syringe is used for self-injection, then the patient can administer medication independently, but the patient may experience fear of needles and accidental actuation
Solution Approach 1:
The patent introduces an automatic injection device as an intermediary between the patient and the needle/syringe system. The device includes a needle shield that covers the needle during storage and transport, and an actuation mechanism that automatically drives the needle into the patient's tissue when activated, eliminating the need for the patient to manually handle or push the plunger, thereby reducing fear and risk of accidental actuation.
Solution Approach 2:
The device performs preliminary actions by pre-assembling the syringe with needle and plunger in a safe configuration, with the needle protected by a shield and the plunger positioned but not yet actuated. The device is prepared in advance for use, requiring only a simple activation step by the patient, which reduces the complexity and fear associated with manual syringe preparation and administration.
2Ease of operation
If the syringe carrier is designed to be easily removable from the housing, then the device is easier to assemble and disassemble, but the risk of premature actuation increases
Solution Approach 1:
The syringe carrier is pre-configured with engagement features that automatically interact with corresponding features in the housing when the carrier is inserted. The plunger is pre-positioned in a retracted state, and the needle is pre-covered by a shield. These preliminary configurations ensure that even if the device is assembled or disassembled easily, the critical safety functions are maintained through the pre-established mechanical interlocks and protective structures.
Data Source
AI summary
Aspects of the present invention relate to an injection device comprising a syringe carrier configured to receive a medicament container, a housing having a proximal end and a distal end; the housing being configured to receive the syringe carrier and releasably engage the proximal end of the syringe carrier and a proximal end cap arranged to engage with the proximal end of the housing and comprising a wall extending distally along the housing, the proximal end cap configured to maintain the engagement between the proximal end of the syringe carrier and the housing.