公开(公告)号：US4795863A

公开(公告)日：1989-01-03

申请号：US818237

申请日：1986-01-13

申请人： Motoyuki Tomizu ,  Kunio Nagata

发明人： Motoyuki Tomizu ,  Kunio Nagata

IPC分类号： H01H1/58 ,  H01H9/02 ,  H01H13/18 ,  H01H15/00 ,  H01H3/16 ,  H01H13/10

CPC分类号： H01H1/58 ,  H01H13/18 ,  H01H9/02

摘要： An electrical switch which includes a casing, a pair of fixed contacts each formed by cutting a rod member into a predetermined length, and disposed in the casing to confront each other, a plunger slidably accommodated in the casing for movement in an axial direction, bearing members slidably supporting the plunger, a movable contact formed by cutting a rod member into a predetermined length and mounted to an intermediate portion of the plunger in a direction intersecting with the fixed contacts, and a return spring directed around the outer periphery of the plunger. The movable contact is restored together with the plunger to close the pair of fixed contacts in a free state.

公开(公告)号：US4719395A

公开(公告)日：1988-01-12

申请号：US944220

申请日：1986-12-22

申请人： Tatsuo Aoi ,  Haruo Atsumi ,  Takeshi Kikukawa ,  Kunio Nagata ,  Yasuhiro Kiyono ,  Sueaki Honda

发明人： Tatsuo Aoi ,  Haruo Atsumi ,  Takeshi Kikukawa ,  Kunio Nagata ,  Yasuhiro Kiyono ,  Sueaki Honda

IPC分类号： H01H9/04 ,  H01H9/06 ,  H01H9/52 ,  H02P7/29 ,  H02P5/17

CPC分类号： H02P7/29 ,  H01H9/061 ,  H01H9/041 ,  H01H9/52 ,  Y10S388/915 ,  Y10S388/934 ,  Y10S388/937

摘要： A variable speed control switch for an electric tool including a DC motor having an armature circuit, includes: a device for turning off and on the armature circuit; an upper heat dissipation cover for covering the top of the turning off and on device; a lower heat dissipation cover for covering the bottom of the turning off and on device; a printed circuit board located at the lower surface of the lower cover for controlling motor speed; a resistor element is provided on the lower surface of the board; a movable contact assembly, including a first contact member for short circuiting the motor terminals, a second contact member for turning ON the power source, a third contact member for short circuiting the turning off and on device, and a brush for providing variable resistance by sliding over the resistor element; a device for biasing the movable contact assembly to the position of short-circuiting the motor terminals; a box like casing which receives the above-mentioned components, the power source terminals, the motor terminal, and provides a depending support portion; an operation lever, drivingly engaged to the movable contact assembly at its upper portion, provides the depending support portion of the casing at its lower pivoted portion, and being adapted to operatively rock about that pivoted portion. By this simple construction the number of parts of the control switch is minimized and the construction is compact, light and cheap.

摘要翻译： 一种用于电动工具的变速控制开关，包括具有电枢电路的DC电动机，包括：用于关闭和接通电枢电路的装置; 用于覆盖关闭和打开设备的顶部的上部散热盖; 一个较低的散热盖，用于覆盖关闭和关闭设备的底部; 位于下盖的下表面的印刷电路板，用于控制电机速度; 电阻元件设置在电路板的下表面上; 可动接触组件，包括用于使电动机端子短路的第一接触构件，用于接通电源的第二接触构件，用于使开关和设备短路的第三接触构件和用于通过 滑过电阻元件; 用于将所述可动触头组件偏压到使所述电动机端子短路的位置的装置; 接收上述部件的盒状壳体，电源端子，电动机端子，并且提供从动支撑部分; 在其上部处驱动地接合到可动接触组件的操作杆在其下枢转部分处提供壳体的悬置支撑部分，并且适于围绕该枢转部分操作地摇动。 通过这种简单的结构，控制开关的部件数量被最小化，结构紧凑，轻便且便宜。