公开(公告)号：USRE38486E1

公开(公告)日：2004-04-06

申请号：US10051224

申请日：2002-01-15

申请人： Ichio Sakabe

发明人： Ichio Sakabe

IPC分类号： H02P700

CPC分类号： H02P7/29

摘要： An electric motor control circuit that prevents lowering of a motor's rotation speed when a load is applied in the case where a rotation speed is adjusted within a range that doesn't exceed a predetermined upper limit of rotation speed. When a base current of a transistor Q1 starts to flow in response to operation of a trigger switch 3, transistor Q1 turns on and a setting signal output from a switch S2 which sets the upper limit rotation of a motor M is bypassed via a bypass way 22 by transistor Q1. Thus, a signal level of the setting signal inputted to an operational amplifier 7 is changed, and output timing of a pulse signal output from a phase control circuit 5 to a gate pulse output circuit 9 is changed and a conducting angle of a triac Q2 is controlled. Because the trigger switch 3 does not adjust an output level of operational amplifier 7, the rotation speed of motor M does not decrease when the load is applied.

公开(公告)号：US6060850A

公开(公告)日：2000-05-09

申请号：US34347

申请日：1998-03-04

申请人： Ichio Sakabe

发明人： Ichio Sakabe

IPC分类号： H02P29/00 ,  H02P23/00 ,  H02P25/00 ,  H02P25/14 ,  H02P27/00 ,  H02K17/32

CPC分类号： H02P25/145 ,  Y10S388/903

摘要： An electric motor control circuit that prevents lowering of a motor's rotation speed when a load is applied in the case where a rotation speed is adjusted within a range that doesn't exceed a predetermined upper limit of rotation speed. When a base current of a transistor Q1 starts to flow in response to operation of a trigger switch 3, transistor Q1 turns on and a setting signal output from a switch S2 which sets the upper limit rotation of a motor M is bypassed via a bypass way 22 by transistor Q1. Thus, a signal level of the setting signal inputted to an operational amplifier 7 is changed, and output timing of a pulse signal output from a phase control circuit 5 to a gate pulse output circuit 9 is changed and a conducting angle of a triac Q2 is controlled. Because the trigger switch 3 does not adjust an output level of operational amplifier 7, the rotation speed of motor M does not decrease when the load is applied.

摘要翻译： 一种电动机控制电路，其在将旋转速度调整到不超过规定的转速上限的范围的情况下，防止在施加负载时电动机的转速下降。 当晶体管Q1的基极电流响应于触发开关3的操作而开始流动时，晶体管Q1导通，并且从设置电动机M的上限旋转的开关S2输出的设定信号经旁路 22由晶体管Q1。 因此，输入到运算放大器7的设定信号的信号电平发生变化，从相位控制电路5向栅极脉冲输出电路9输出的脉冲信号的输出定时改变，三端双向可控硅开关元件Q2的导通角为 受控。 由于触发开关3不调整运算放大器7的输出电平，所以当施加负载时电动机M的转速不会降低。

公开(公告)号：US07152329B2

公开(公告)日：2006-12-26

申请号：US10147396

申请日：2002-05-15

申请人： Masaki Kondo ,  Ichio Sakabe ,  Shinji Hirabayashi

发明人： Masaki Kondo ,  Ichio Sakabe ,  Shinji Hirabayashi

IPC分类号： B26B33/00 ,  B23B49/00

CPC分类号： B25F5/021 ,  B23D49/162 ,  B23D51/00

摘要： An electric jigsaw (1) includes a main housing (2) containing a gear housing (10), a reciprocating rod (11) vertically projecting from within the gear housing, a saw blade (13) coupled to the rod via a coupling ring (12), and a transparent synthetic resin guard (14) provided at the lower front end of the main housing and the gear housing (10). The transparent guard includes a vertical optical path therethrough and is attached to the gear housing in such a manner as to be horizontally rotatable between a protective position for covering the coupling ring and an open position for exposing the coupling ring. Additionally included in the jigsaw is an insulating cover (15) assembled to the gear housing (10) within the main housing (2) and a downward oriented light-emitting diode (19) disposed at the bottom end of the insulating cover (15) directly above the transparent guard (14) when the guard is in its protective position. The light from the LED is transmitted through the front guard along the optical path, illuminating a workpiece (W) immediately forward of the blade without significant scattering or diffusion.

摘要翻译： 电动拼图（1）包括容纳齿轮壳体（10）的主壳体（2），从齿轮壳体内垂直突出的往复杆（11），经由联接环联接到杆的锯片（13） 12），以及设置在主壳体的下前端和齿轮壳体（10）上的透明合成树脂护罩（14）。 透明防护罩包括穿过其中的垂直光路，并且以能够在用于覆盖联接环的保护位置和用于暴露联接环的打开位置之间水平地旋转的方式附接到齿轮壳体。 另外，在拼图中还包括组装到主壳体（2）内的齿轮壳体（10）的绝缘盖（15）和设置在绝缘盖（15）的底端的向下定向的发光二极管（19） 当护罩处于其保护位置时，在透明防护罩（14）的正上方。 来自LED的光沿着光路传输通过前护罩，在刀片的正前方照射工件（W），而不会有明显的散射或扩散。