发明名称 Handwork tool, especially electric screwdriver
摘要 The tool (1) includes an electric drive motor (12) arranged in a casing (11) for the activation of a tool, e.g. a screwdriver (2), and an axially adjustable depth plot (16), through which the drive motor is automatically switched off when a workpiece (4) reaches a certain depth. A switch circuit arrangement (21) is associated with the drive motor, and includes a switch (24) for switching the drive motor on and off, a first switching stage (25) for changing the polarity of the drive motor between right- or left-turn, and a second switching stage (26) for switching off the drive motor through the depth plot. An electric switching element (32, 33) is arranged in a branch (31) bypassing the second switching stage, which bridges the second switching stage at an activation of the first switching stage through the depth plot to reverse the rotation direction of the drive motor.
申请公布号 DE19626731(A1) 申请公布日期 1998.01.08
申请号 DE1996126731 申请日期 1996.07.03
申请人 J. WAGNER GMBH, 88048 FRIEDRICHSHAFEN, DE 发明人 ULBRICH, JENS, 88094 OBERTEURINGEN, DE;JELTSCH, THOMAS, 88677 MARKDORF, DE
分类号 B23B49/00;B25B21/00;B25B23/00;B25B23/14;B25B23/147;H02P7/00 主分类号 B23B49/00
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