MECHANISM FOR DRUG DELIVERY DEVICE Russian patent published in 2018 - IPC A61M5/24 

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, in particular to mechanisms for a drug delivery device. Mechanism has a longitudinal axis and comprises a first member having a first contact surface and a second member. First member is configured to be assembled to the second member, and the first member and the second member are configured such that the first contact surface abuts the second member, when the first member is assembled to the second member, wherein the first contact surface is arranged such that a force applied to the mechanism in a direction parallel to the longitudinal axis is split up into a first component in a direction perpendicular to a surface normal of the first contact surface and a second component parallel to the surface normal, the first member and the second member are configured such that the first member is detached from the second member by the force applied to the mechanism in a direction parallel to the longitudinal axis, if the absolute value of the force is greater than a first predetermined value, which is defined as the absolute value of the force which has a first component strong enough to move the first contact surface out of abutment with the second member. Mechanism comprises an additional member, which is mechanically engaged with either the first member or the second member and which is configured such that the additional member is damaged when the first member and the second member are detached from each other by the force applied to the mechanism in a direction parallel to the longitudinal axis having an absolute value greater than the first predetermined value, thereby preventing any further use of the mechanism.

EFFECT: disclosed is a mechanism for a drug delivery device configured to prevent further use.

14 cl, 4 dwg