Reusable Injector Housing With Controlled Needle Depth
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing injection devices require dexterity for proper injection depth and are not easily reusable, making them difficult to use and unsustainable.
Innovation Solution
A reusable housing device with a top and bottom body that encases the injection device, allowing for controlled injection depth through movable parts and releasable attachment, with features like snap-fit members and snap-fit members for easy attachment, and a removable cap with removable needle shield for easy attachment, and a needle cover for safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a reusable housing device with encasing structure is used, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The housing device is divided into a bottom body and a top body that can be separately assembled and disassembled. The bottom body includes a holder for the injection device, while the top body contains the plunger rod and needle cover. This segmentation allows for easier grasping and operation while maintaining a relatively simple overall structure through modular design.
Solution Approach 2:
The injection device is nested within the holder of the bottom body, which itself is contained within the housing device. The top body encases the injection device during use, providing protection and ease of grasping. This nested arrangement allows the complex function to be achieved through a compact, manageable structure.
2Manufacturing precision
If a holder with resilient member is added to control injection depth, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The resilient member (spring) automatically pushes the injection device against the bottom body to maintain proper injection depth. This self-service mechanism eliminates the need for complex external control systems, achieving precise depth control through a simple elastic force that continuously adjusts to maintain the correct position.
Solution Approach 2:
The holder is pre-configured with the resilient member to automatically maintain the injection device in the correct position before injection begins. This preliminary action ensures that the injection depth is controlled from the start, eliminating the need for continuous adjustment during the injection process.
3Reliability
If blocking features are added to prevent premature movement, then reliability is improved, but device complexity increases
Solution Approach 1:
The blocking features (protrusion and recess) are designed to prevent the top body from moving distally before the injection needle reaches the proper depth. This preliminary anti-action counteracts any premature movement by creating a mechanical interlock that only releases when the needle is correctly positioned, ensuring safety without requiring complex control systems.
Solution Approach 2:
The blocking features act as an intermediary mechanism between the top body and bottom body, mediating the movement relationship. The protrusion on the top body and the corresponding recess on the bottom body create a simple mechanical interlock that controls the sequence of operations, allowing movement only when appropriate.
4Ease of operation
If snap-fit members are used for releasable attachment, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The snap-fit members provide a dynamic attachment mechanism that allows the top body to be easily attached to and detached from the bottom body. The elastic deformation of the snap-fit members enables quick engagement and disengagement without requiring complex fastening systems, maintaining ease of operation while keeping the structure relatively simple.
Data Source
Figure 1A~1B
Figure 1C~2A
Figure 2B~2E
AI summary
This housing device (1) includes: a bottom body (3) extending a longitudinal axis A, the bottom body (3) being configured for receiving an injection device (10) having an injection needle (102), a casing (110), a medical container (101) arranged within the casing (110), and a needle guard (112) axially movable with respect to the casing (110). The housing device also includes: a top body (2), axially movable with respect to the bottom body (3) between an initial position and an injection end position distally located with respect to the initial position, the top body (2) including a proximal end (201) and a plunger rod (22) configured for pushing a stopper (107) of the injection device (10) in order to expel a medical product contained within the medical container (101); releasable attachment features (71, 73) for allowing releasable attachment and detachment of the top body (2) and the bottom body (3); and a needle cover (4), axially movable with respect to the bottom body (3) between an initial position and a retracted position proximally located with respect to the initial position.