Pellet Injector Needle Replacement Drawer
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Solution Overview
Problem
Pellet injectors often experience issues with hollow-bore needles becoming worn out or breaking off during use, leading to time-consuming replacements and disruptions in veterinary procedures.
Innovation Solution
An injector design that includes a main body with a delivery opening and a magazine guide for accommodating multiple barrels, along with a drawer for storing replacement hollow-bore needles, allowing for quick and easy replacement without interrupting the injection process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hollow-bore needle is connected to the delivery opening for pellet injection, then the injection function is achieved, but the needle becomes worn out or breaks off during use
Solution Approach 1:
The drawer is pre-loaded with replacement hollow-bore needles before the injection process begins. This preliminary preparation allows immediate replacement of worn or broken needles without interrupting the workflow, directly resolving the contradiction between needle durability and replacement time.
Solution Approach 2:
The drawer mechanism enables the user to independently access and replace needles without requiring external assistance or complex procedures. The self-contained design with easy-access drawer and spring-loaded needle holders allows rapid needle replacement, addressing both reliability and time loss concerns.
2Ease of operation
If replacement needles are stored separately from the injector, then the injector structure remains simple, but needle replacement requires interruption and additional steps
Solution Approach 1:
The replacement needle storage drawer is integrated directly into the injector body, merging the storage function with the injection device. This combination eliminates the need for separate storage locations and allows the drawer to be accessed directly from the injector, improving ease of operation while maintaining acceptable structural complexity.
Solution Approach 2:
The drawer with needle storage is nested within the injector housing, creating a compact integrated structure. The spring-loaded needle holders are nested within the drawer, allowing multiple needles to be stored in a space-efficient manner. This nesting approach improves accessibility without significantly increasing overall device complexity.
3Productivity
If the drawer is made accessible for quick needle replacement, then replacement speed improves, but the risk of accidental opening or needle damage increases
Solution Approach 1:
Spring elements are pre-installed in the needle holders to provide cushioning and controlled release of replacement needles. This beforehand preparation ensures that needles are held securely during storage but can be easily accessed when needed, while the spring mechanism prevents accidental discharge or damage, resolving the contradiction between accessibility and safety.
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 solution ensures continuous operation by providing a readily accessible replacement needle, reducing downtime and improving efficiency in veterinary pellet injections.
Implementation Method 1
The drawer can comprise a spring element which, when the drawer is pulled out, raises the hollow-bore needle (or hollow-bore needles) situated in the drawer
Data Source
AI summary
An injector for injecting pellets includes a main body, a delivery opening which is formed on the main body and to which a hollow-bore needle can be connected and a magazine guide formed in the main body for a magazine which, for accommodating the pellets, comprises several barrels. Each barrel includes a hollow cylindrical compartment with an open front end and an open rear end. The magazine guide brings the magazine, barrel by barrel, into an injection position, in which a plunger of the injector can be introduced into the barrel via the rear end of the barrel positioned in the injection position and moved in the direction of the delivery opening in order to deliver the pellet provided in the barrel via the delivery opening. A drawer is formed in the main body for accommodating a replacement hollow-bore needle.