| 摘要 |
1. Device to fill a tooth cavity with filling compounds, e.g. with amalgam, which comprises a filling socket, a filling push shaft, moving backwards and forwards in a guide duct and passing into the filling socket, and a removable change magazine arranged transversely to the filling socket and opening into it, from which magazine some of the filling compound must be forced into the filling socket via a magazine push shaft guided in a second guide duct, at the beginning of the working stroke of the filling push shaft, commencing above the opening of the change magazine and ending at the output of the filling socket, the filling and magazine push shaft, surrounded by a common housing, being connected together by means of a mechanical gear coordinating their movement, which gear includes a rack connected to the magazine push shaft, and a push lever pivoted on the housing, which lever engages with its free end in the rack, and displaces a projection in the direction of the filling socket during a working stroke by means of a finger operated sliding knob in driving connection with the filling push shaft before the front end of the filling push shaft reaches the upper edge of the opening of the change magazine in the filling socket, characterised in that the sliding knob consists of a two-armed rotary slide (54) pivoted on the housing (2), which slide projects from the housing (2) with one of its arms (57) exhibiting a finger recess (56), and engages by articulated means with the end (58) of its other arm (59) in a toothed segment (61) also supported on the housing (2), the toothing (63) of which segment engages in a pinion (64) rigidly supported on the housing (2), to which pinion a rotary element (65) is rigidly connected, which element exhibits a first projection (66) for advancing the push lever (7), and hence of the rack (14) of the magazine push shaft (4), and a second projection (67) for feeding the filling push shaft (3). |
