Pharmaceutical Liquid Administration Port for Cradle Mounting Durability

Solution Overview

Problem

Existing drug solution administration apparatuses face issues with deterioration of connection port components due to repeated attaching and detaching operations, leading to potential drug leakage and compromised mountability, especially when the apparatus body is rotated during mounting and detaching.

Innovation Solution

The apparatus features a design with complementary shapes between the apparatus body and cradle, including engaging recesses and step portions to stabilize the mounting process, and a rotating member to control fluid connection, preventing damage to the connection port during use.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the apparatus body is rotated during mounting and detaching operations, then the connection port components are subjected to repeated puncturing and removing operations, but this causes deterioration of the connection port components and potential drug leakage

Engineering Contradiction:

Improvemounting and detaching operationsVSAvoidconnection port component durability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent extracts the harmful rotational movement from the mounting operation by introducing a sliding mechanism. The apparatus body slides along the longitudinal axis of the cradle rather than rotating around it, separating the mounting function from the harmful rotational action that causes connection port deterioration.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of rotating the apparatus body around the cradle as in conventional designs, the patent inverts the movement direction by having the apparatus body slide along the cradle's longitudinal axis. This inversion eliminates the rotational puncturing action that damages connection port components.

Inventive Principle:

Principle #13The other way round (Inversion)

2Adaptability or versatility

If repeated attaching and detaching operations are performed, then the apparatus can be reused, but the connection port components deteriorate leading to drug leakage

Engineering Contradiction:

Improvereusability of apparatusVSAvoidconnection port seal integrity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent extracts the harmful rotational movement from the mounting operation by introducing a sliding mechanism. The apparatus body slides along the longitudinal axis of the cradle rather than rotating around it, separating the mounting function from the harmful rotational action that causes connection port deterioration.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The sliding mechanism acts as a protective cushion by distributing the mechanical stress of repeated connections along the longitudinal axis, preventing concentrated stress at the connection port and thereby maintaining seal integrity over multiple use cycles.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Ease of manufacture

If the apparatus body is rotated during mounting, then connection is established, but the rotation causes damage to the connection port and reduces mountability

Engineering Contradiction:

Improveconnection establishmentVSAvoidconnection port integrity

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent extracts the harmful rotational movement from the mounting operation by introducing a sliding mechanism. The apparatus body slides along the longitudinal axis of the cradle rather than rotating around it, separating the mounting function from the harmful rotational action that causes connection port deterioration.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentEP4302799B1Pharmaceutical liquid administration device

Publication Date: 2025.08.27 TERUMO KK

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AI summary

[Problem] To prevent deterioration of members constituting a connection port during repetition of attaching and detaching operations between an apparatus body and a cradle, and to improve mountability of the apparatus body to the cradle. [Means for Resolution] In a drug solution administration apparatus 100, 110, a connection port 40 includes a port body 41 configured to hold a cannula 50 and be locked to a cradle 30, and a rotating member 421, 424 to which a drug solution supply portion 16, 19 is mounted and that is rotatable, with a direction in which a lumen of the cannula 50 extends as a central axis, in a direction substantially parallel to a placement surface portion 31a, and the rotating member 421, 424 rotates following a rotational movement of an apparatus body 101, 111 substantially parallel to the placement surface portion 31a in a state where the drug solution supply portion 16, 19 is mounted.