Patent ID: 8092417
Filing Date: 2012-01-10
Classification: A61M

Abstract:
1. A device for regulating the flow rate of a liquid medicine on a flow path of the liquid medicine, comprising: an inflow passage for allowing the liquid medicine to be introduced therethrough; a discharge passage for allowing the liquid medicine to be discharged therethrough; a space for storing the liquid medicine introduced through the inflow passage; a liquid medicine passage unit placed between the space and the discharge passage and having a plurality of liquid medicine flow passages to allow the liquid medicine to flow therethrough, and a plurality of outlets formed at the end of the respective liquid medicine flow passages toward the discharge passage to correspond to the respective liquid medicine flow passages, wherein the plurality of liquid medicine flow passages are arranged to form a first row of a plurality of liquid medicine flow passages and a second row of a plurality of liquid medicine flow passages, wherein the plurality of liquid medicine flow passages of the first row and of the second row are disposed equidistantly in a circumferential direction, and wherein each of the liquid medicine flow passages of the second row is disposed at a position corresponding to a middle position between the adjacent liquid medicine flow passages of the first row; and a discharge amount regulating valve placed between the liquid medicine passage unit and the discharge passage, the discharge amount regulating valve being rotatable about a rotation axis to change the number of liquid medicine flow passages of the liquid medicine passage unit that communicate with the discharge passage; wherein the discharge amount regulating valve comprises a rotary member rotatable about the rotation axis, the rotary member having at least a portion taking the shape of a body of revolution about the rotation axis, and wherein an outer surface of the portion of the rotary member is formed with a guide slot caused to communicate with the discharge passage by a rotation of the rotary member and a plurality of branched slots branched and extended from both sides of the guide slot and adapted to communicate with the outlets of the liquid medicine passage unit; wherein the outlets of the liquid medicine passage unit are arranged equidistantly in a circumferential direction, and the branched slots extended from both sides of the guide slot of the rotary member are arranged equidistantly in a circumferential direction; and wherein when the discharge amount regulating valve is rotated by a rotational movement of the rotary member, the respective liquid medicine flow passages of the first row and the second row alternately communicate with the branched slots of the rotary member via the outlets of the liquid medicine passage unit so as to change the number of the branched slots of the rotary member communicating with the liquid medicine flow passages via the outlets of the liquid medicine passage unit, and finally to change the number of liquid medicine flow passages communicating with the discharge passage.