| 摘要 |
<p>PROBLEM TO BE SOLVED: To extrude a content without any time lag and reliably release threaded engagement.SOLUTION: In conjunction with an event that a cartridge 1 is removed from a body cylinder 2, threaded engagement between a female screw 7 of a female screw member 5 and a male screw 17 of a moving body 4 is released, a first elastic body 19 presses the moving body 4 forward in an axial direction and moves it to a forward limit. When a new or another cartridge 1 is inserted into the body cylinder 2, the moving body 4 comes into contact with a piston 48 in the cartridge 1 and pushed back rearward in the axial direction against the pressing force of the first elastic body 19. Then, in conjunction with mounting of the cartridge 1 in the body cylinder 2, the female screw 7 and the male screw 17 are threadedly engaged to allow the moving body 4 to advance. In that state, the piston 48 and the moving body 4 are in the contact state so as to, in a repetitive rotating operation by a user after replacement of the cartridge, be able to exclude a content L without any time lag. Further, a threaded engagement release member 6 forcibly expand the elastic part 23 of the female screw member 5 in the radial direction to reliably release the threaded engagement.</p> |
