Blood Sampling Adapter Rotation Restriction via Screw and Locking Member
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Solution Overview
Problem
Conventional adapters for blood sampling kits may rotate with respect to the blood sampling holder, especially in engagement type holders, which can compromise the stability of the blood sampling needle during blood collection.
Innovation Solution
The adapter features a through-hole at its bottom with a cylindrical protruding part having a male screw and a cut-out part, allowing secure attachment to both screw and engagement type holders by preventing rotation through engagement with the locking member and thread ridge, ensuring stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the adapter uses only a locking member engaged to an annular groove part for attachment, then the adapter can be attached to engagement type blood sampling holders, but the adapter may rotate with respect to the blood sampling holder during blood sampling
Solution Approach 1:
The patent combines two attachment mechanisms into a single adapter design: the engagement type attachment (locking member fitting into groove part) and the screw type attachment (male screw threading into female screw). This merging allows the adapter to be securely attached to either type of blood sampling holder while preventing rotation through the male screw's threading engagement.
Solution Approach 2:
The adapter is designed with universal compatibility to work with both engagement type and screw type blood sampling holders. The male screw can engage with either a female screw (screw type) or provide structural support when the locking member engages with the groove part (engagement type), making the adapter multi-functional and adaptable to different holder types.
2Adaptability or versatility
If the adapter is designed as a dual-type adapter applicable to both screw type and engagement type blood sampling holders, then the adapter's versatility is improved, but the rotation restriction capability deteriorates
Solution Approach 1:
The patent merges the engagement type attachment mechanism (locking member and groove part) with the screw type attachment mechanism (male and female screws) into a single adapter design. This combination ensures that regardless of which attachment type is used, the male screw provides rotational stability through its threading engagement, maintaining reliability while achieving versatility.
Solution Approach 2:
The male screw is designed to serve multiple functions: it provides the attachment interface for screw type holders through threading engagement, and it provides structural support and rotation prevention for engagement type holders. This multi-functionality ensures rotation restriction reliability is maintained across both holder types.
Data Source
Figure 1~2
Figure 3~4
Figure 5A~5B
AI summary
An adapter (20) is attached to an attachment part (4) which has a through-hole (9) and provided at a bottom part (7) of a blood sampling holder (3) which is a bottomed hollow cylinder. The adapter (20) includes: a hollow body part (21) which is connectable to a butterfly needle (40) for sampling blood from a human body and through which the sampled blood flows; a flange part (22) which is provided at a base end side of the body part (21) and which abuts the leading end surface (8) of the attachment part (4); and a cylindrical protruding part (23) which extends from the flange part (22) in a direction opposite to the body part (21) and which is inserted into the through-hole (9) of the attachment part (4). In the outer periphery of the protruding part (23), a male screw part (27) is formed from the flange part (22) side, and a cut-out part (26) is formed by cutting out a portion in a peripheral direction, closer to the base end side than the leading end side, of the male screw part (27).