Content injection operation button and aerosol product having this content injection operation button

摘要

In a content injection operation button having an annular injection port, uniform spray of contents, a high adhering rate of the contents to an object to be injected such as a diseased portion, and a noise reduction in the injection of the contents are attempted.An injection port a is set between the annular nozzle 2 and the core 1C.The linear passage of the contents passage in the horizontal direction of the injection port a is an upstream side annular passage B where the cross sectional area of the contents between the core 1c and the core 1C is large and the flow of the contents is weakened. The downstream side of the downstream side is the downstream side annular passage C in which the cross-sectional area of the contents is continuously reduced in the flow direction of the contents.The reduction in cross-sectional area of the contents of the downstream annular passage C is set by an annular nozzle tapered surface 2a and a core 1C which have an inner diameter decreasing toward the injection port a.