Abstract: A brushless direct-current speed regulation switch with a highly integrated structure. The brushless direct-current speed regulation switch comprises a base body, a bottom cover and a push shaft; a moving contact assembly in contact with the push shaft is arranged below the push shaft, a moving elastic sheet, a moving contact support for supporting the moving contact assembly and a static contact pin assembly matched with the moving contact assembly are arranged below the moving contact assembly, one end of the moving elastic sheet is connected with the moving contact assembly, and the other end of the moving elastic sheet is connected with the moving contact support; a circuit board assembly is arranged on one side of the push shaft, and a connecting reed and a speed regulation reed which can slide on the circuit board assembly are arranged between the circuit board assembly and the push shaft.

Abstract: A power tool includes an electric motor, an output member selectively driven by the electric motor and a battery receptacle configured to receive a battery. The power tool also includes a switch trigger moveable between a first position and a second position. The switch trigger inhibits electrical communication between the battery and the electric motor while the switch trigger is in the first position. The switch trigger operates a switch to provide electrical communication between the electric motor and the battery while the switch trigger is in the second position. A lock actuator prevents movement of the switch trigger to the second position while the lock actuator is in a locked position, and the lock actuator permits movement of the switch trigger to the second position while in an unlocked position. The lock actuator is biased into the unlocked position while the battery is positioned in the receptacle.

Abstract: A power tool (130) may include an end effector (200) configured to engage an object to be worked by the tool, a power unit (230), a drive assembly (210) configured to drive the end effector responsive to application of input power thereto, and a motor (220) configured to supply the input power to the drive assembly selectively based on operation of a power control assembly (240) that controls coupling of the motor to the power unit. The power control assembly includes a trigger (300) having a full range of motion (310) between a rest position and an actuated position. The power control assembly further defines a transition point (316) between a first region (312) and a second region (314) of the full range of motion. The power control assembly includes a first biasing assembly (330) that opposes movement of the trigger in the first region, and a second biasing assembly (340) that opposes movement of the trigger at least at the transition point.

Abstract: The disclosure relates to a switching device for a hammer drill, having a manually actuatable switching element. It is proposed that the switching element is designed for actuating an operational mode switching unit and a switching unit for changing the direction of rotation.

Abstract: A vehicular apron system is provided. The vehicular apron is dimensioned and adapted to extend the length of a door of the vehicle at its outward-most portion, thereby absorbing damage that would otherwise be imparted into the underlying door. The bellow elements have accordion sidewalls which facilitates their movement between a uninflated condition and an expanded condition for absorbing impact. The LIDAR situational awareness functionality is operatively associated with the inflation valves fluidly coupled to the bellow elements, wherein these bellow elements are automatically urged to an expanded condition in response to an object within the vicinity of the vehicle. The LIDAR situational awareness functionality provides video output to be used as evidence in cases of theft or contested accidents.

Abstract: A chain saw includes a housing, the housing including a first housing, a second housing, and a receiving cavity formed by the first housing and the second housing; a cutter including a blade chain and a blade bar for supporting the blade chain, the cutter being mounted on the housing; a power assembly, the power assembly including a drive unit for driving the cutter and a power supply unit for supplying power to the drive unit; a front handle connected to the second housing and surrounding the first housing, the front handle including a grip portion, a first and second fixing parts which are located at two ends of the grip portion, the first fixing part abutting on the side wall of the second housing, and the second fixing part being located at the bottom of the housing and connecting with the second housing.

Abstract: A hand-held power tool has a tool holder for holding a tool, an electric motor for driving the tool holder, and a handle for holding and guiding the hand-held power tool. A button has a button housing, a pin that can be moved on an actuation axis, and an electric slider which is connected to the pin and which slides on an electric slider track. The button housing is suspended in the handle in such a way that the button housing can be pivoted about a pivot axis perpendicular to the actuation axis.

Abstract: A trigger assembly for an electrical device that includes a main body having a housing within which an electrical switch unit is disposed. The trigger assembly may include a trigger member having an engagement portion that is hingedly connected to the main body so that the trigger member is rotatable about a hinge relative to the main body. The trigger assembly may include an actuator member operably-connected to the trigger member that is movable between an OFF position and an ON position. The trigger assembly may include a lock-off mechanism including a lock-off member that is selectively operable to restrict movement of the trigger member towards the main body and to thereby restrict movement of the actuator member from the OFF position into the ON position, and, to not restrict movement of the trigger member toward the main body.

Abstract: An aircraft hand controller is disclosed. The hand controller includes a set of finger controls on a single hand grip structure, the set of finger controls including a first finger control configured to control throttle of the aircraft and a second finger control, separate from the first, configured to control rotation about a first rotational axis of the aircraft.

Abstract: A covering for a trigger assembly of an electrical device, said covering being configured for at least partially covering a torsion spring of the trigger assembly so as to alleviate ingress of dust, water and other particulates in to contact with the torsion spring.

Abstract: A power tool is provided including a housing, a motor disposed within the housing, an on/off switch having a contact tip disposed within the housing for activating the motor, a paddle switch coupled to the housing via a pivot member and having a paddle trigger engageable by a user, a switch contact lever disposed in selectable engagement with the contact tip of the on/off switch to activate or deactivate the on/off switch, and a biasing member disposed between the switch contact lever and the paddle switch to absorb a travel distance of the paddle trigger with respect to the switch contact lever.

Abstract: A housing includes a case member having an opened front face, and a cover member firmly fixed with the case member to close the opened front face of the case member. The case member has a penetration hole penetrating its side face. A movable part includes an inner member disposed inside the housing to control a circuit, and an outer member being a discrete piece from the inner member and exposed outside the housing to be manipulated by a user. The outer member includes a shaft part inserted through the penetration hole.

Abstract: An aircraft hand controller is disclosed. The hand controller includes a set of finger controls on a single hand grip structure, the set of finger controls including a first finger control configured to control throttle of the aircraft and a second finger control, separate from the first, configured to control rotation about a first rotational axis of the aircraft.

Abstract: A speed control switch includes a base. An upper end of the base is provided with a switch assembly. A side of the base is provided with a PCB board and a slide terminal. The PCB board is provided with a first contact plate. The slide terminal is slidably connected with the first contact plate. The base is provided with a trigger assembly for driving the slide terminal to slide along the first contact plate and to close the switch assembly. The speed control switch can regulate the speed of a motor precisely. The structure is compact to reduce the size of the switch, so that it is convenient for operation.

Abstract: A wall-mounted dimmer may include an actuator assembly configured to translate a touch interaction with the dimmer into a desired dimming level. The actuator assembly may include a control interface having a resilient, deflectable membrane, a plurality of force-sensitive impedance members supported by the membrane, and an actuator configured to transfer a touch along the actuator to the membrane, causing the membrane to actuate one or more corresponding force-sensitive impedance members. The force-sensitive impedance members may be configured to make contact with corresponding ones of a plurality of open circuit pads supported by a printed circuit board. Each of the plurality of open circuit pads may correspond to a predetermined dimming level applied to a lighting load electrically connected to the dimmer. The control interface may be configured such that contact between the force-sensitive impedance members and corresponding ones of the open circuit pads is pressure sensitive.

Abstract: A power tool is provided including a housing; a brushless DC motor housed inside an upper body of the housing; a control unit housed inside a handle of the housing, the control unit comprising a micro-controller mounted over a control circuit board; and a variable-speed switch assembly including a main body mounted directly on a surface of the control circuit board, a trigger, a plunger linearly movable with the trigger with respect to the main body, a speed-sensing mechanism housed inside the main body and coupled to the plunger to generate a variable-speed voltage signal based on the position of the plunger, and at least one output pin connecting the speed-sensing mechanism of the variable-speed switch assembly directly to at least one conductive track on the control circuit board to provide the variable-speed voltage signal to the micro-controller via the at least one conductive track.

Abstract: A hand-operated machine tool device, in particular for an angle grinder, includes a housing region and at least one operating element. The housing region is at least substantially rod-shaped and is configured to be used as a main gripping element. The at least one operating element extends in the housing region in a main extension direction of the housing region. The hand-operated machine tool device also has a least one mounting which supports at least one operating face of the at least one operating element such that the at least one operating element is configured to pivot about at least one axis aligned at least substantially parallel to the main extension direction.

Abstract: An electric working machine including: an input part; a control unit configured to control a motor in accordance with an operation amount of the input part; and a switching part; wherein, when a predetermined operation is performed to the switching part, the control unit shifts to a fixed control mode in which the motor is controlled in accordance with an operation amount of the input part at the time when the predetermined operation is performed to the switching part, irrespective of an operation amount of the input part after the predetermined operation is performed to the switching part.

Abstract: A power tool includes a working element, a motor, a motor actuator, a housing, a light emitting element, a locking element, and a switch element positioned between the housing and the locking element. The housing supports the motor, the motor actuator, and the light emitting element and movably supports the locking element. The light emitting element illuminates a work area around the working element, and the motor drives the working element when actuated by the motor actuator. The locking element enables operation of the motor actuator when in an unlocked position and prevents operation of the motor actuator when in a locked position. When in the unlocked position, the locking element operates the switch element to activate the light emitting element.

Abstract: An electronic power apparatus includes a housing, a pair of input power pins and a pair of output power pins, and power components mounted on a power circuit board and electrically connected to the input power pins and the output power pins to modulate a supply of power from the input power pins to the output power pins. A control unit of the electronic power apparatus is arranged on a control circuit board disposed at a distance from the power circuit board inside the housing. A user-actuated input unit of the electronic power apparatus includes a variable-speed actuator having a first portion at least partially arranged outside the housing to be engageable by a user and a second portion movably arranged between the power circuit board and the control circuit board.

Abstract: In a hand-held power tool with a device for presetting a selected rotation direction of a drive motor that is associated with the power tool and contained in a tool housing. The device is equipped with an actuating element accessible from outside the tool housing for mechanically actuating a switch element, which is situated inside the tool housing and is at least embodied for electrically switching between a first and second rotation direction of the drive motor, the switch element is situated in the vicinity of the actuating element.

Abstract: Systems and methods are disclosed that enable spring loaded mechanical key switch assemblies having variable displacement sensing capabilities. In one example, the disclosed key switch assemblies may be implemented in a keyboard system and used for providing variable displacement output signals that may be processed by a controller for input to a host processing device of an information handling system, such as a desktop or notebook computer. In another example, the disclosed key switch assemblies may be configured to provide both a digital “make” connection signal and separate variable displacement output signal/s that may be processed for input to a host processing device of an information handling system.

Abstract: A tool cover for receiving a tool housing of a pneumatic tool is disclosed. The tool cover supports and aligns an inductor element of a stator with magnets of a rotor within the tool housing. The tool cover also supports a circuit to which the inductor element is electrically connected, where the circuit comprises a power conditioner for receiving current from the inductor element and conditioning the current to be acceptable for supply to a load that comprises one or more logic processing devices.

Abstract: A snowmobile includes an engine, an engine power controller, an operation portion, an operation input detector, an operation amount detector, and a control portion. The control portion does not control the engine power controller based on an amount detected by the operation amount detector in a preliminary zone in which the operation amount detected by the operation amount detector is not more than a first operation amount. The control portion controls the engine power controller based on an operation amount detected by the operation amount detector if the operation amount is greater than the first operation amount. A second operation amount smaller than the first operation amount is set in the preliminary zone and the control portion determines whether operation of the operation portion is carried out based on whether operation corresponding to the second operation amount is detected by the operation input detector.

Abstract: An electric tool has a rib projecting from an inner peripheral surface of the electric tool, and a trigger switch. The trigger switch has a housing having a housing venthole, a contact mechanism disposed in the housing, and a trigger that, when depressed into the housing, drives the contact mechanism. The housing of the trigger switch is bonded to the rib. The rib has a rib venthole. The housing venthole is communicated with the rib venthole. The rib venthole is covered with a filter.

Abstract: A trigger mechanism includes soft stops and an associated method activates a switch in a device or apparatus. The trigger mechanism includes a trigger receptacle, a trigger disposed in the trigger receptacle and movable between an un-actuated and an actuated position by a user depressing the trigger, and a soft stop comprised of at least one projection positioned to engage a resilient elastomeric insert. Moving the trigger from the un-actuated to actuated position compresses the elastomeric insert with the projection and activates the switch to provide a tactile sensation of the switch activation to the user. The switch may be an electric switch disposed in a hand held device, such as a barcode scanner in some embodiments.

Abstract: Embodiments of the invention provide a trigger switch in which a trigger is pulled into a housing so as to operate a contact mechanism, thereby driving a motor of an electric drill. The inside of the housing is divided into a first region including a circuit in which a main electric current for driving the motor flows, and a second region including the contact mechanism of a signal circuit which controls a rotation of the motor. An air vent is disposed on an outer circumferential surface of the first region of the housing. The trigger switch can reduce operational failure due to dust and the like without making the structure thereof complicated.

Abstract: An electronic device includes a housing, and a key fixed to the housing. The key comprises a key cap fixed to the housing, a trigger component protruded from a surface of the key cap. The trigger component defines at least one recessed portion, the at least one recessed portion extends from one end of the trigger component away from the key cap to the other end of the trigger component from which the trigger component extends.

Abstract: An electrical switch for an electric tool with an electric motor including an actuating mechanism which can be adjusted between an initial position and a final position. The switch has a signaling device, which is operatively connected to the actuating mechanism, for generating a signal associated with the adjustment path of the actuating mechanism. The switch has a contact system, with the actuating mechanism having a switching effect on the contact system in one position, whereby the contact system is configured as a spring-action contact system.

Abstract: A switch assembly provides a pressing plate on a pivot contact lever to minimize heat generation at the point between the pivot contact lever and the contact point by providing an additional parallel connection contact plate which is in parallel connection to the pivot contact lever. The switch assembly provides convex contact portions on the internal output ports of the forward/reverse switch mechanism. A supplementary elastic metal plate to the pivot contact lever is provided to solve the problem of loose contact at the pivot connection site where the pivot contact lever and the support unit meet, and provides a supplementary contact unit to the movable contact device at the forward/reverse switch mechanism.

Abstract: An electronic device includes a power switch, an elastic force member adjacent to the power switch, a triggering member fixed on the elastic force member to trigger the power switch, and an elastic reposition member. The triggering member is capable of sliding between a first position and a second position relative to the power switch. The elastic reposition member provides elastic force to move the triggering member from the first position to the second position. In the first position, the triggering member faces the power switch and can be pressed to trigger the power switch. In the second position, the triggering member is away from the power switch.

Abstract: In a trigger switch having a normal and reverse switching lever configured to switch the direction of rotation of a motor, a case is formed with a speed control unit storage chamber for storing a speed control unit, a revolving shaft storage chamber for storing a revolving shaft of the switching lever and a contact strip member storage chamber with continuing from the revolving shaft storage chamber through a shielding member therebetween for storing contact strip member of the switching lever, the revolving shaft storage chamber is formed with a revolving shaft engaging hole configured to allow the revolving shaft to be inserted in an engaged state on an upper portion thereof on the side of the trigger lever, and a waterproof device for covering at least a gap between the switching lever and the revolving shaft engaging hole is provided to prevent entry of water therein.

Abstract: A trigger switch has an insulative enclosure, a movable contact element, and a sliding control device slidably mounted to the insulative enclosure. The insulative enclosure includes a case and a cover. The case has plural terminal subassemblies made of conductive metal members disposed therein. The case has an opening over which the cover is mounted. A fixed contact is mounted on one of the terminal subassemblies in the case. The movable contact element has a movable contact mounted at one end of the movable contact element and located opposite to the fixed contact. The movable contact element is swingably supported on another terminal subassembly. A trigger is mounted at one end of the sliding control device. An auxiliary brush is interposed in the movable contact element. A support member is provided with an opening portion in which the auxiliary brush is engaged such that the brush is swingably supported.

Abstract: This invention is for a trigger switch apparatus for a hand held electric drill and includes a control of the electric power to a drill for fast or slow rotation of the drill bit by moving a rheostat contact bridge over a rheostat coil section for control of the rotation speed of the drill bit, and further a leaf spring holds the trigger carriage stop shoulder onto the carriage, and on seizure, kick back or sudden torque of the drill bit there is a cut off of power and the switch reverts to an “off” or “open” position, which then requires re-setting of the switch to a “closed” or “on” position for re-actuating operation of the hand held electric drill.

Abstract: Disclosed a trigger switch including fixed contacts forming main contacts double in series and functioning as a switch for supplying a motor with power and slide plate parts connected to the fixed contacts; and movable contacts provided in an actuator interlocking with an operation part and auxiliary contacts sliding on the slide plate parts. Drawing the operation part causes the actuator to move forward making the movable contact come into electric contact with the fixed contact to supply the motor with power, simultaneously making the auxiliary contact bridge over the slide plate parts to achieve electric contact to make no potential in the contact between the movable contact and the fixed contact. Releasing the operation part make the movable contact separate from the fixed contact, simultaneously making the auxiliary contact bridging over the slide plate parts cause a break of the contact with the slide plate part.

Abstract: Actuator system comprising at least one actuator, a control unit, a power supply and an operations panel, where the actuator in a transmission between an activation element (4) and a reversible electric motor is inserted a quick release unit (13) for release of the activation element (4) from the electric motor and the part of the transmission between the motor and the quick release. The actuator comprises at least one electrical switch (30), activated with the quick release. The signal from the electrical switch(es) (30) may be used for various purposes, such as triggering a power supply from sleep mode, activating one or more actuators, or activating an external function such as an alarm etc.

Abstract: An electronic device includes a power switch, an elastic force member adjacent to the power switch, a triggering member fixed on the elastic force member to trigger the power switch, and an elastic reposition member. The triggering member is capable of sliding between a first position and a second position relative to the power switch. The elastic reposition member provides elastic force to move the triggering member from the first position to the second position. In the first position, the triggering member faces the power switch and can be pressed to trigger the power switch. In the second position, the triggering member is away from the power switch.

Abstract: An activation device useful for drag racers comprising a body, a trigger, a cocking pressure spring plunger set screw, a trigger tension spring plunger set screw, a trigger tension jam nut, a body cover, cocking safety button, screws, a microswitch, a wave washer, and a trigger set screw. The body comprises a trigger pivot post, a wiring channel, a wiring aperture, and a recess surface. The trigger comprises a trigger pivot post aperture, a trigger released position notch, a trigger cocked position notch, and a cocking channel.

Abstract: A device includes a trigger arrangement activating a function of the device. The trigger arrangement includes a trigger mechanism movable between a first position and a second position. The device also includes a feedback mechanism exerting a force biasing the trigger mechanism to the first position. The feedback mechanism produces a tactile feedback response when the trigger mechanism is moved from the first position.

Abstract: A trigger mechanism with soft stops and associated method for activating a switch in a device or apparatus. The trigger mechanism includes a trigger receptacle, a trigger disposed in the trigger receptacle and movable between an un-actuated and an actuated position by a user depressing the trigger, and a soft stop comprised of at least one projection positioned to engage a resilient elastomeric insert. Moving the trigger from the un-actuated to actuated position compresses the elastomeric insert with the projection and activates the switch to provide a tactile sensation of the switch activation to the user. The switch may be an electric switch disposed in a hand held device, such as a barcode scanner in some embodiments.

Abstract: Method and device are provided where a barrier is formed at or around the trigger of a device with a rest area for the index finger so that the finger can remain (extended) off the trigger when the device is not in use. Position and/or size of the rest area is adjustable to, for example, accommodate index fingers of various sizes. Adjustment of the position of the rest area can be achieved by means of a screw which slides a resting piece to a selected correct location, or by means of inserts that may be indexed to a selected length. Device can be a nailer, and the barrier is configured to accommodate a depth gage of the nailer.

Abstract: In a trigger switch having a normal and reverse switching lever configured to switch the direction of rotation of a motor, a case is formed with a speed control unit storage chamber for storing a speed control unit, a revolving shaft storage chamber for storing a revolving shaft of the switching lever and a contact strip member storage chamber with continuing from the revolving shaft storage chamber through a shielding member therebetween for storing contact strip member of the switching lever, the revolving shaft storage chamber is formed with a revolving shaft engaging hole configured to allow the revolving shaft to be inserted in an engaged state on an upper portion thereof on the side of the trigger lever, and a waterproof device for covering at least a gap between the switching lever and the revolving shaft engaging hole is provided to prevent entry of water therein.

Abstract: An electrical switch has a fixed contact and a moving contact arranged for movement between an ON position in contact with the fixed contact and an OFF position out of contact with the fixed contact, and an operating member for operating the moving contact. A spring co-acts between the operating member and the moving contact and resiliently biases the moving contact towards each of the ON and OFF positions through an over-centre action of the spring. An end piece is fitted at each end of the spring, which has a formation, for example, a groove, for pure rotary engagement with a part, for example, a pin, movable with the operating member or moving contact for imparting resilient action upon the operating member or the moving contact.

Abstract: An electrical switch has two fixed contacts and a moving contact, a spring urging the moving contact towards contacting the fixed contacts, and an actuating mechanism for moving the moving contact away from the fixed contacts against urging by the spring and, alternatively, allowing the moving contact to contact the fixed contacts under the action of the spring. The actuating mechanism has an engaging member for engaging and retaining the moving contact and includes a spring acting on the engaging member for separating the moving contact from the fixed contacts through an instant spring-release action. One of the engaging member and the contacts is configured such that the moving contact will be engaged and moved by the engaging member out of contact with one of the fixed contacts earlier than with the other fixed contact.

Abstract: A switch assembly provides a pressing plate on a pivot contact lever to minimize heat generation at the point between the pivot contact lever and the contact point by providing an additional parallel connection contact plate which is in parallel connection to the pivot contact lever. The switch assembly provides convex contact portions on the internal output ports of the forward/reverse switch mechanism. A supplementary elastic metal plate to the pivot contact lever is provided to solve the problem of loose contact at the pivot connection site where the pivot contact lever and the support unit meet, and provides a supplementary contact unit to the movable contact device at the forward/reverse switch mechanism.

Abstract: A trigger switch includes a first locating element, an elastic second locating element, and a pressing element slidably attached to the bezel. The pressing element is restricted by the first locating element to a first position of the bezel to prevent the trigger portion from contacting the trigger element. The second locating element restricts the pressing element to a second position of the bezel to further prevent the trigger portion from contacting the trigger element. The trigger portion contacts and applies a force to the trigger element to trigger the trigger element when the pressing element overcomes elastic forces of the second locating element.

Abstract: A switch for use with an electric power tool equipped with a trigger switch. The trigger switch has first contacts for turning on and off a motor, second contacts for turning on and off a speed controller, and a trigger lever. The first contacts are formed by a first fixed contact formed on a second conductive plate and a first movable contact formed on a swingable movable contact plate located opposite to the first fixed contact. The second contacts are formed by a second fixed contact and a second movable contact mounted opposite to the second fixed contact formed on a first conductive plate. The second movable contact is located around the front end of a slide plate slidably supported on the trigger lever. The second fixed contact and sliding plate portion are arranged parallel to the first fixed contact and the support member.

Abstract: Disclosed a trigger switch having a trigger to be locked stably when it is pulled in. The trigger has wall surfaces disposed oppositely leaving a space therebetween. Pivotal holes are formed in the wall surfaces and a pivotal shaft is inserted in said holes. Rotary shaft holes are formed in the wall surfaces, and a rotary shaft for inverting a switch is inserted in the rotary shaft holes. A stopper for stopping the trigger from being pulled while rotating about the pivotal shaft is mounted between the pivotal shaft and the rotary shaft. The stopper includes a stopper shaft engaged in stopper holes formed in the wall surfaces. A stopper button is mounted at an end of the stopper shaft. When the stopper button is pushed, the stopper shaft is moved to place a thinned portion thereof into the stopper holes, thus releasing the trigger from the stopper.

Abstract: A trigger switch has a chassis, a slide member slidably retained in the chassis, a trigger connected to the slide member and projected from the chassis, the trigger configured to slide the slide member when the trigger is drawn towards the chassis, a pair of power-supply connecting terminals connected to a power supply, a pair of motor output terminals connected to a motor, a speed control circuit configured to output a current to the motor output terminal while controlling the current when the speed control circuit is connected to the power supply, a first contact mechanism configured to connect the power-supply connecting terminal to the speed control circuit when the trigger is drawn by a first amount; and a second contact mechanism configured to connect the power-supply connecting terminal to the motor output terminal when the trigger is drawn by a second amount.

Abstract: Disclosed a trigger switch including fixed contacts forming main contacts double in series and functioning as a switch for supplying a motor with power and slide plate parts connected to the fixed contacts; and movable contacts provided in an actuator interlocking with an operation part and auxiliary contacts sliding on the slide plate parts. Drawing the operation part causes the actuator to move forward making the movable contact come into electric contact with the fixed contact to supply the motor with power, simultaneously making the auxiliary contact bridge over the slide plate parts to achieve electric contact to make no potential in the contact between the movable contact and the fixed contact. Releasing the operation part make the movable contact separate from the fixed contact, simultaneously making the auxiliary contact bridging over the slide plate parts cause a break of the contact with the slide plate part.