Knock-type ejection container

A knock ejection container with a knock mechanism in which an ejection nozzle is provided at a front end of a container body, a knock button is provided at a rear end of the container body, a container chamber is provided in the container body to contain a liquid dental bonding material, the container chamber provided with the knock mechanism being interlocked to a pushing operation of the knock button, and the liquid dental bonding material contained in the container chamber falls down in drops from the ejection nozzle due to the knock mechanism in response to the pushing operation of the knock button, and wherein the ejection nozzle includes a nozzle end portion on the front end, an ejection port at the front end thereof, a nozzle body on the rear end, and a stepped surface is formed at a boundary portion between the nozzle end portion and the nozzle body over the whole circumference of the nozzle end portion, the stepped surface having a diameter expanding from an outer circumferential surface of the nozzle end portion toward the outer side of the nozzle end portion in the radial direction, wherein an inner diameter D1 of the ejection portion is 0.9 mm to 1.9 mm, an outer diameter D2 of the ejection portion is 1.4 mm to 3.0 mm, a diameter D3 of the stepped surface is 2.2 mm to 4.6 mm, and a length H from the ejection portion of the nozzle end portion to the stepped surface is 1.7 mm to 3.3 mm, wherein if the amount of a drop discharged from the nozzle portion by pushing operation of the knock button is denoted by V, the inner diameter of the ejection port of the nozzle end portion D1, the outer diameter of the ejection port of the nozzle end portion by D2, the outer diameter of the stepped surface by D3, and the length from the ejection port of the nozzle end portion to the stepped surface by H, then the inner diameter D1 of the ejection port is set to be aV1/3 in which a is in a range from 0.5 to 0.7, the outer diameter D2 of the ejection port is set to be bV1/3 in which b is in a range from 0.8 to 1.1, the outer diameter D3 of the stepped surface is set to be cV1/3 in which c is in a range from 1.3 to 1.7, and the length H from the ejection port of the nozzle end portion to the stepped surface is set to be dV1/3 in which d is in a range from 1.0 to 1.2, in a manner that D1, D2, D3 and H are all satisfied.