Medicament Delivery Assembly With Longitudinal-to-Transverse Conversion
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Solution Overview
Problem
Existing medicament delivery devices lack efficient mechanisms for converting longitudinal movements into transverse movements to facilitate easy and accurate medicament administration by patients without formal medical training.
Innovation Solution
An assembly for a medicament delivery device comprising a container holder, an actuator, and a drive assembly with a motion converter and a rod, where the actuator's movement along the longitudinal axis is converted into the rod's movement along a transverse axis through an engagement between the motion converter and the activation surface, enabling efficient medicament ejection or clamping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a motion converter mechanism is added to convert longitudinal actuator movement into transverse rod movement, then the ease of operation and accuracy of medicament delivery is improved, but the device complexity increases
Solution Approach 1:
The motion converter transforms the actuator's movement from one dimension (longitudinal axis) to another dimension (transverse axis) through geometric conversion. The inclined plane converts linear longitudinal displacement into transverse displacement of the rod, enabling the drive mechanism to act perpendicular to the actuator's movement direction without requiring complex additional components.
Solution Approach 2:
The motion converter acts as an intermediary mechanical element between the actuator and the rod. It receives longitudinal movement from the actuator and converts it into transverse movement for the rod through its inclined surface geometry, serving as a mediator that simplifies the overall control mechanism while achieving the desired motion transformation.
2Manufacturing precision
If an inclined plane motion converter is used to convert longitudinal movement to transverse movement, then the manufacturing precision and reliability of medicament delivery is improved, but the device complexity increases
Solution Approach 1:
The inclined plane utilizes geometric conversion to transform movement dimensions, where the angle and geometry of the inclined surface precisely control the relationship between longitudinal actuator displacement and transverse rod displacement. This geometric approach provides inherent precision without requiring complex control mechanisms.
Solution Approach 2:
The motion converter's inclined plane geometry (angle, slope, surface profile) is optimized to achieve precise motion conversion. By carefully selecting and manufacturing the inclined surface parameters, the system achieves accurate and reliable transverse rod movement corresponding to longitudinal actuator input, with the geometric parameters themselves serving as the precision control mechanism.
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
Facilitates easy and accurate medicament delivery by converting longitudinal actuator movements into transverse rod movements, enhancing the usability and reliability of medicament delivery devices for self-administration.
Implementation Method 1
a movement of the actuator relative to the container holder in the direction of the longitudinal axis is converted to a movement of the rod relative to the container holder along a transverse axis transverse to the longitudinal axis through an engagement between the motion converter of the drive assembly and the activation surface of the actuator
Data Source
AI summary
An assembly for a medicament delivery device is presented having a container holder with a body extending along a longitudinal axis between a proximal and a distal end, the body defining an interior chamber for receiving a medicament container. An actuator is connected to the container holder and axially movable relative to the body of the container holder. The drive assembly is attached to the body of the container holder has a motion converter and a rod, where the actuator has an activation surface movable relative to the motion converter of the drive assembly in the direction of the longitudinal axis such that a movement of the actuator relative to the container holder in the direction of the longitudinal axis is converted to a movement of the rod relative to the container holder along a transverse axis transverse to the longitudinal axis through an engagement between the motion converter of the drive assembly and the activation surface of the actuator.