Spraying Device Guide Groove Asymmetry
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Solution Overview
Problem
Existing nasal medication spraying devices lack precision in administering equal doses without waste, as they often require multiple apparatuses and rely on cumbersome scaling for dosage adjustment, and do not effectively prevent unintended spraying or provide sufficient pressure for atomization.
Innovation Solution
A spraying device with a hollow barrel, a gasket, and a rod featuring guide grooves and energizing protrusions that prevent unintended rotation and ensure precise, equal dosing by engaging with a regulating member, allowing for controlled administration and atomization of medication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a syringe allows free rotation of the rod in the circumferential direction while moving the rod forward, then the rod can be easily rotated to engage different stoppers, but unintended rotation occurs causing failure of expected engagement and excessive medicine discharge
Solution Approach 1:
The guide groove is designed with an asymmetric profile that includes a flat surface portion and a inclined surface portion. The flat surface portion engages with a corresponding flat surface on the rod, creating a non-circular interface that prevents unintended rotation while still allowing controlled rotation in the desired direction to engage different stoppers with the stopper receiver.
Solution Approach 2:
The guide groove transitions from a static circular constraint to a dynamic path that guides the rod through specific rotational and axial movements. The groove's shape allows the rod to rotate and move forward in a coordinated manner, enabling engagement of different stoppers while preventing random rotation that would cause engagement failure.
2Adaptability or versatility
If the rod is rotated to engage the stopper receiver with another stopper for further medicine discharge, then multiple doses can be administered, but the rod unintentionally moves forward during rotation causing smaller than intended dosage
Solution Approach 1:
The guide groove's asymmetric design with flat and inclined surfaces ensures that rod rotation and forward movement are coupled in a precise, predetermined manner. This prevents unintended forward movement during rotation, ensuring that each stopper engagement delivers the exact intended dosage while still allowing multiple doses to be administered by rotating to engage different stoppers.
3Measurement precision
If one administering apparatus is used for each dose, then precise dosage control is achieved, but a considerable amount of waste occurs when multiple doses are required
Solution Approach 1:
The syringe incorporates multiple stoppers of different lengths positioned at different locations along the rod, with each stopper corresponding to a specific dosage amount. This segmentation of the dosage control mechanism allows a single apparatus to precisely administer multiple different doses by engaging different stoppers, eliminating the need for multiple separate apparatuses and reducing medicine waste.
Solution Approach 2:
The syringe is designed as a multi-functional apparatus that can administer multiple different doses of medicine using the same device. By incorporating multiple stoppers that can be sequentially engaged with the stopper receiver, the syringe serves as a universal tool for various dosing requirements, replacing the need for multiple single-use apparatuses and reducing waste.
4Loss of substance
If a number of doses is sucked at one time and medicine is discharged multiple times, then waste is reduced, but adjustment is required and excessive power of concentration is needed to achieve exact dosage
Solution Approach 1:
The syringe divides the total medicine volume into multiple discrete dose segments using stoppers of different lengths positioned at specific locations. Each stopper represents a predetermined dosage amount, allowing the user to administer exact doses by engaging the corresponding stopper with the stopper receiver, eliminating the need for manual adjustment and concentration of attention.
Solution Approach 2:
The syringe is designed to automatically provide the correct dosage amount through its built-in stopper system. The stoppers are pre-positioned at specific locations corresponding to different dose amounts, and the stopper receiver automatically engages with the appropriate stopper based on the user's rotation and forward movement, providing self-service dosage control without requiring manual adjustment or excessive concentration.
Data Source
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AI summary
An object is to provide an administration device capable of discharging a prescribed, equal amount of medicine a number of times by spraying. Provided is a spraying device including: a barrel allowing attachment of a spray nozzle at a tip end; a gasket provided slidably movable in liquid-tight manner in said barrel; a rod coupled to a base end of the gasket and having a guide groove; and a regulating member provided on the barrel, having a projection that can slidably fit with the guide groove; wherein the guide groove includes at least a first administering groove and a second administering groove provided continuous from the first administering groove; the second administering groove is configured to include a transitional portion extending in the circumferential direction with a groove wall on the base end side aligned with the base end of the first administering portion, and a second administering portion extending from the transitional portion to a base end along the longitudinal direction; and an energizing protrusion engageable with the projection is provided at a boundary between the transitional portion and the second administering portion.