| 主权项 |
1. A nozzle tip to be inserted and locked into a discharging port (Ma) provided on a tip-end side of a mixing tip (M) for mixing and discharging a pasty dental material, wherein the discharging port (Ma) is provided with a cylindrical portion (Maa) having an inner diameter (d1) and a protrusion portion (Mab) having an inner diameter (d2) on the tip-end side of the cylindrical portion (Maa),
wherein the nozzle tip comprises an insertion portion (1) which is to be inserted into the discharging port (Ma) of the mixing tip (M), wherein the insertion portion (1) consists of a cylindrical portion for temporary fixing (2), a taper portion (3), and a cylindrical portion for engaging (4), wherein the cylindrical portion for temporary fixing (2) has an outer diameter (D1) which is equal to the inner diameter (d2) of the protrusion portion (Mab) of the mixing tip (M), wherein the taper portion (3) is continuously provided on the cylindrical portion for temporary fixing (2), and the outer diameter thereof increasing toward the tip-end side of the nozzle tip up to an outer diameter (D2) and decreasing to an outer diameter (D3) at a step portion (3a), wherein the outer diameter (D2) is smaller than the inner diameter (d1) of the cylindrical portion (Maa) of the mixing tip (M), wherein the outer diameter (D3) is larger than the inner diameter (d2) of the protrusion portion (Mab) of the mixing tip (M), and wherein the cylindrical portion for engaging (4) is continuously provided on the step portion (3a) of the taper portion (3), and has an outer diameter which is equal to the outer diameter (D3) and a length which is longer than a length of the protrusion portion (Mab) of the mixing tip (M). |
