75 results about "Contact group" patented technology

The invention discloses a printing head assembly, an ink box, an ink box installation detection method and an image forming device, the printing head assembly comprises a circuit board and a contact unit, and the circuit board comprises a signal contact area. The signal contact area at least comprises a first contact area arranged corresponding to the first nozzle module and a second contact area arranged corresponding to the second nozzle module; the contact unit comprises a plurality of signal contacts and further comprises a contact detection contact set, the contact detection contact set comprises at least one contact detection contact, the at least one contact detection contact in the contact detection contact set is arranged in the middle area of the signal contact area, and the center line of the contact unit is located in the middle area. At least one of the first contact area and the second contact area is arranged on one side of the center line of the contact unit. According to the technical scheme of the embodiment of the invention, whether the ink box and the image forming device are in good contact can be detected, and the working reliability of the image forming device is ensured.

A method for learning finger gaiting skills for multi-fingered robot hands may decompose a finger-gaiting task into shorter tasks by contact groups. The method may augment a reference trajectory for each shorter task. The method may use representation pretraining and exploration for learning.

The invention provides a push type switch with a level linkage function, which comprises a shell, a push assembly, a contact module and a locking reset module, and is characterized in that the push assembly comprises a push button, a connecting rod and a convex clamping block, and the push button is arranged at the top end of the connecting rod; the connecting rod is arranged in the cavity of the shell in the axis direction of the shell and can reciprocate in the axis direction of the shell. The protruding clamping block is located on the outer side wall of the connecting rod and used for being clamped with the first clamping groove or the second clamping groove. The contact module comprises a first contact group and a second contact group which are arranged at an interval along the axis direction of the shell; the locking reset module is connected with the pressing button and used for locking the state of the pressing assembly when the pressing assembly moves to different positions and controlling the on-off state of the first contact set and the second contact set in cooperation with movement of the pressing assembly. The technical problem that in the prior art, a push type switch cannot achieve high and low level switching in a closed state can be solved.

The invention provides an arc extinguishing system. The arc extinguishing system comprises a first arc extinguishing group, a second arc extinguishing group, a third arc extinguishing group, a first end tab, a second end tab, an insulating shell, a contact group, a conducting piece and an end cover. The contact piece group is opposite to the conduction piece. And the three arc extinguishing groups are arranged in the insulating shell and are arranged behind the contact group together. And the first run-on plate is tightly attached to the conduction piece and is arranged below the first arc extinguishing group. And the second run-on plate is arranged above the third arc extinguishing group. A contact plate is arranged at one end, facing the contact group, of the second run-on plate. Magnetism increasing plates are arranged on the two sides of the contact plate, and a local magnetism increasing area is defined by the magnetism increasing plates and the contact plate. The arc extinguishing group is matched with the long contact piece of the contact group to form an arc striking structure, and when the circuit breaker is switched off, a local magnetism increasing area is constructed at the stopping position of the long contact piece of the contact group, so that the electromagnetic driving force of an arc entering the arc extinguishing group is improved. Meanwhile, staggered main cutting areas and side cutting areas are arranged in the arc extinguishing groups, group-by-group, batch and partition cutting of the arc and the cutting blades is achieved, the arc cutting difficulty is lowered, and the arc extinguishing capacity of the contact arc extinguishing system is improved.

The invention relates to a contact module structure of a switch, which comprises a moving contact, and the moving contact can be contacted with and separated from a static contact in a rotating process, so that a main loop of the switch is in a switching-on or switching-off state. And the moving contact group in the moving contact can be limited by the limiting clamping boss to slowly reach a final opening position. The limiting clamping boss can block an electric arc escaping between the moving contact and the static contact, so that the electric arc is stretched and thinned to be dissipated according to a designed route. And the limiting clamping boss enables the movable contact group to be stressed and clamped inwards so as to stop moving, so that the abrasion of the shell is reduced, and the service life of the product is prolonged.

The utility model discloses a relay. The relay comprises a housing; the magnetic driving part is arranged in the shell and comprises a coil assembly, a yoke assembly and an armature assembly, and the axial direction of the coil assembly is defined as the X direction; the contact part comprises a movable contact group and a static contact group which can be mutually disconnected or attracted along the X direction, and the static contact group is arranged on the shell; the pushing part comprises a pushing card and a clamping piece, one end of the pushing card is provided with the armature assembly, the clamping piece is used for installing the movable contact set, the other end of the pushing card is provided with a clamping groove, the extending direction of the clamping groove is defined as the Z direction, the clamping groove extends to the edge of the clamping groove, and the clamping piece is clamped in the clamping groove. According to the relay provided by the utility model, the pushing card is provided with the clamping groove extending to the edge, so that the pushing card can be conveniently clamped in the clamping groove through the clamping piece, and the movable contact group can be rapidly installed.

The utility model discloses a pluggable contact group for a railway point switch, which comprises a contact seat and a contact group, the two ends of the contact seat are respectively provided with six binding posts, and each binding post is connected with a plug-in sheet. According to the utility model, through the function separation design of the contact seat and the contact group, wiring and on-off functions are modularized, misconnection caused by wire dismounting and other risks caused by the fact that a fastener falls into the switch machine are thoroughly avoided, the contact group is vertically locked with the plug-in sheet and the bolt through the plug-in head, stable electrical connection is kept in vibration and severe environments, and the safety of the switch machine is ensured. And faults such as poor contact and short circuit are reduced. Meanwhile, the pluggable structure supports rapid replacement of the contact group, and the maintenance time is shortened. And the bottom sealing structure isolates pollutants, is matched with regular section repair / factory repair, maintains contact cleanness and low resistance, and ensures long-term reliable operation. According to the design, the problem of environmental deterioration of an open contact is radically solved, the operation and maintenance cost is reduced, and the railway transportation safety and efficiency are remarkably improved.

The invention relates to a radio wave distance measurement technology, in particular to a radio frequency distance measurement device capable of crossing obstacles and a distance measurement method, and the device comprises a reference plane and a lifting foundation which can alternately move up and down along the height direction of the reference plane; a plurality of trigger blocks are fixedly arranged on the reference plane in the height direction of the reference plane, the trigger blocks are arranged side by side to form a column of contact sets, the contact sets are located on one side of the lifting foundation, a swing arm is arranged on the lifting foundation in a deflection mode, and a radio frequency range finder is fixedly installed on the swing arm; the lifting base is further provided with a transposition mechanism used for being matched with the contact set, and the transposition mechanism is connected with the swing arm. According to the invention, a common programmable time sequence control system is abandoned, and a physical structure is adopted to control the plane orientation of the radio frequency range finder, so that the environmental interference noise of a wireless radio frequency electric wave signal in the propagation process is reduced, and the probability of data distortion and decoding errors is reduced.

The present patent application relates to the field of electrical engineering and power engineering and can be used for the timely emergency shutdown of electrical equipment. The invention relates to a fire-extinguishing device having disposed therein a module (1) which contains an aerosol-forming or gas-forming composition, and comprising an electrical igniter (7) of said module (1) and a heat-sensitive trigger device (4), which are connected to one another in series by conductors, wherein the device further comprises: a contact group (10) for triggering, over conductors by means of an external signal, the electrical igniter (7) of the module, or for supplying a trigger voltage to the heat-sensitive trigger device (4) and the electrical igniter (7) of the module; an activation sensor (11), and a button (18) for manually activating the electrical igniter (7) of the module (1); the activation sensor (11) is connected by conductors (17) to the contact group (10); and the button (18) for manually activating the electrical igniter (7) of the module is connected by conductors to the electrical igniter (7) of the module. The technical result consists in increasing the timeliness of an initial fire-extinguishing action and more efficiently impeding the spread of fire in an enclosed space such as, in particular, an electrical enclosure, while simultaneously issuing a signal to trigger such fire-extinguishing devices, or issuing an information signal to emergency control panels.

The utility model discloses a point switch contact group dynamometer, and relates to the railway equipment signal detection technology field, the point switch contact group dynamometer comprises a dynamometer body and a contact assembly, one side of the dynamometer body is fixedly provided with a display screen and buttons, the other side of the dynamometer body is fixedly provided with a first baffle plate and a second baffle plate, the first probe assembly is composed of a first conduction piece, a second conduction piece, a first pressure diaphragm, a second pressure diaphragm and a supporting plate. The point switch contact group dynamometer disclosed by the utility model is provided with the supporting plate, so that the pressure of the first contact sheet and the pressure of the second contact sheet are conducted to the first conduction sheet and the second conduction sheet, and then the pressure conducted to the first pressure diaphragm and the pressure conducted to the second pressure diaphragm do not influence each other; meanwhile, a plurality of contact pieces can be tested, time and labor are saved, a large number of point switch contact sets can be conveniently tested, and the use efficiency of the dynamometer is improved.

The embodiment of the invention relates to an ink-jet printer, and discloses a printing head assembly, an ink box and an image forming device. In the present invention, the print head assembly comprises: a nozzle unit comprising a black nozzle and a color nozzle; the contact unit comprises a first contact group and a second contact group, relative to a separation line of the black nozzle and the color nozzle, the first contact group and the black nozzle are located on the same side, and the second contact group and the color nozzle are located on the same side; the first contact for transmitting the special signal of the black nozzle and the second contact for transmitting the special signal of the color nozzle are respectively positioned in the first contact group and the second contact group; a lead wire for electrically connecting the nozzle unit and the contact unit; when the printing head assembly is unfolded to enable the nozzle unit and the contact unit to be located on the same plane, at least two of the leads intersect in different planes. According to the printing head assembly, the ink box and the image forming device, miniaturization of the ink box is facilitated, and the cost of the ink box is saved.

This application discloses a mechanical characteristic testing system for railway signal relays, comprising a turntable device configured to rotate the railway signal relay base to a first testing station and a second testing station; a contact pressure testing mechanism and an industrial vision camera are adapted at the first testing station to measure the contact pressure of the contact group; a gap testing mechanism is adapted at the second testing station to detect the gap of the contact group, and a contact alignment testing mechanism is adapted to detect the contact alignment; this invention, based on key equipment such as an automated motion mechanism, a line laser profile scanner, a contact pressure sensor, and a railway signal relay base, constructs a testing station for the mechanical characteristic parameters of railway signal relays, making the three testing mechanisms independent and non-interfering with each other, and making the system design more compact under the premise that the mechanisms do not interfere with each other.

The utility model relates to the technical field of electric vehicle power management, and discloses a contact scale cleaning device for an electric vehicle battery. Comprising an operation installation disc, two contact friction arc-shaped blocks which are installed on the operation installation disc and used for cleaning scale deposit of a switch-on contact set, and two contact friction arc-shaped blocks which are installed on the operation installation disc and used for cleaning scale deposit of switch-on contacts. Wherein the two contact friction arc-shaped blocks are symmetrically arranged on the two sides of the mode adjusting disc and make contact with the switching-on contacts at the two ends respectively, the two contact friction arc-shaped blocks are symmetrically arranged between the two switching-on contact sets and make separable contact with the two switching-on contact sets respectively, and the operation installation disc and the mode adjusting disc are coaxially arranged and can rotate relatively independently. Therefore, the two contact friction arc-shaped blocks are connected with the contact group, and the two contact friction arc-shaped blocks and the switch contacts can rotate relatively, so that scales generated by oxidation and spark corrosion on the switch contacts can be cleaned through friction, and the influence on the use effect and the service life of the battery pack due to reduction of an effective contact surface of electric contact is avoided.

The utility model provides a sealed magnetic latching relay, which comprises an electromagnetic part and a contact part, the electromagnetic part comprises a coil group, a yoke magnetic steel group and an armature group, the contact part comprises at least one contact group arranged on the same side, and each contact group comprises a movable spring and a static contact group. The movable spring is connected with the armature group and corresponds to the static contact group, and the armature group swings back and forth to drive the movable spring to be in contact with or separated from the static contact group; and in the two yoke magnetic steel groups, the magnetic force of the magnetic steel of the yoke magnetic steel group on the same side as the static contact group is greater than that of the magnetic steel of the yoke magnetic steel group on the other side. Asymmetric contact spring counterforces of the relay form good cooperation, and stable operation of the relay is ensured.

The invention discloses a novel high-voltage direct-current contactor with a normally-open or normally-closed auxiliary contact, and relates to the technical field of direct-current contactors, the novel high-voltage direct-current contactor structurally comprises a ceramic cover assembly, a coil assembly and a fixing assembly, an independent auxiliary contact loop is constructed while a main loop is arranged, and the state of a static contact loop is monitored by the auxiliary loop; the auxiliary contact is arranged to be in the shape of a Chinese character'ji ', one end of the auxiliary contact extends into the fixing assembly, the other end of the auxiliary contact is placed corresponding to the auxiliary reed, and the auxiliary contact and the auxiliary movable reed are assembled into a normally-closed auxiliary contact set. The auxiliary contact is arranged to be in a reverse n shape, one end of the auxiliary contact extends into the fixing assembly, the other end of the auxiliary contact is placed corresponding to the auxiliary reed, the auxiliary contact and the auxiliary movable reed are assembled into a normally-open type auxiliary contact set, various closing modes of an auxiliary loop are arranged, and the normally-open type or the normally-closed type is adjusted according to application requirements. And the application field of the product is enriched, so that the requirements of customers under various working conditions are met.

The present application provides a device slot identification method, an electronic device, and a computer readable storage medium. The method comprises: when a mounted expansion port on which an expansion device is mounted is present in a plurality of expansion ports, acquiring slot indication information stored in a specified register of an associated adapter card, and obtaining target slot indication information, wherein the associated adapter card is an adapter card connecting the mounted expansion port to the expansion device mounted on the mounted expansion port, the target slot indication information is generated on the basis of the position of a positioning contact in a first positioning contact group to which the positioning contact belongs, said positioning contact being in contact with a metal copper exposure area of the associated adapter card, and the target slot indication information is used for identifying a slot position of an expansion slot where the associated adapter card is mounted; and parsing the target slot indication information to determine, from among a plurality of expansion slots, the expansion slot where the associated adapter card is mounted. The present application solves the problem in the related art of poor device use flexibility in the device slot identification method.

The application discloses a modular combined multi-position isolating switch, wherein an operating handle is fixed to one end of a main rotating shaft through a handle rod, a movable contact cam is installed on a shaft body of the main rotating shaft, a locking pin respectively locks the operating handle in different rotating positions, a control handle ball can release the locking of the operating handle by the locking pin, a contact group is installed in a switch frame, and the movable contact cam can drive the contact group in a corresponding position to adjust a contact state of the contact group during rotation, a preset contact group corresponds to an angle of the movable contact cam relative to the main rotating shaft, and a combination of the contact state of the contact group under the driving of the movable contact cam meets a preset switch state of a current rotating position. Through the technical scheme of the application, circuit switching of multiple rotating position states is realized, the volume of the isolating switch is greatly reduced, complicated structure systems are modularized and integrated, and the operability and maintainability of the isolating switch are greatly improved.

The utility model provides a moving contact group of a circuit breaker. The moving contact group comprises a contact piece, a connector bar and a flexible connector. One end of the flexible connector is fixedly conducted with the contact piece, and the other end of the flexible connector is fixedly conducted with the line bank. The line bank is fixed on the circuit breaker, and the contact piece is rotatably installed in the circuit breaker. The flexible connections are divided into two or more groups. And one ends of the two or more groups of flexible connections are fixed together with the contact piece. And the other ends of the two or more groups of flexible connections are respectively contacted, fixed and conducted through different electric connection surfaces on the line bank so as to be electrically connected with the line bank. A plurality of electric connection surfaces are arranged in different directions of one end, used for flexible connection and fixation, of the line bank, so that two or more groups of flexible connections can be fixedly and electrically connected with the line bank through a larger contact surface, and the moving contact group of the circuit breaker is good in contact, temperature rise in operation and safer and more reliable.

The application discloses a relay protection circuit and a UPS, which are applied to the technical field of circuits and comprise a relay including a control coil and a contact group, the contact group being connected with a first direct-current power supply and a direct-current conversion circuit; a relay driving circuit connected with the control coil; a coil detection circuit, which is used for outputting first and second fault signals to a controller and a hardware driving locking circuit respectively when detecting that the control coil is in an abnormal working state; the hardware driving locking circuit, which is used for adjusting a circuit state of the hardware driving locking circuit to switch the direct-current conversion driving circuit to a non-working state when receiving the second fault signal; the controller, which is used for controlling the direct-current conversion driving circuit to be switched to the non-working state when receiving the first fault signal; a direct-current conversion circuit; and a direct-current conversion driving circuit connected with the direct-current conversion circuit. The scheme of the application can effectively avoid the situation that the relay is directly disconnected, and the reliability of the circuit is ensured.

A print head assembly (120), an ink cartridge (100) and an image forming apparatus. The print head assembly (120) comprises a circuit board (700), a print head unit (200) and a contact unit (300), wherein the print head unit (200) comprises a first nozzle module (210) and a second nozzle module (220), the first nozzle module (210) comprising a first nozzle array (211), and the second nozzle module (220) comprising a second nozzle array (221); the contact unit (300) comprises a signal contact group (400), and the signal contact group (400) comprises a first dedicated contact group (410) and a second dedicated contact group (420), the first dedicated contact group (410) comprising a plurality of first dedicated contacts (411), and the second dedicated contact group (420) comprising a plurality of second dedicated contacts (421); and in the direction of length of the print head assembly (120), the first dedicated contact group (410) is arranged corresponding to the first nozzle array (211), and the second dedicated contact group (420) is arranged corresponding to the second nozzle array (221).

The utility model relates to a handheld code scanning gun base. The handheld code scanning gun base comprises a shell, a scanning window and a metal contact set. The cross section of the shell is of a square structure, and the top of the shell is suitable for fixedly placing a handheld code scanning gun; the scanning window is arranged on the upper end face of the shell and is suitable for scanning a two-dimensional code; the top of the base is provided with a metal contact set, and the metal contact set is arranged on one side of the base and is suitable for being electrically connected with a handheld code scanning gun. The handheld code scanning gun base is simple in structure, the handheld code scanning gun can be charged on the basis of bearing the handheld code scanning gun, and the requirements of users are better met.

This utility model relates to the field of low-voltage electrical appliances, specifically to a switching device. Its switching unit includes at least two sets of switching modules arranged side-by-side along a second direction d2. Each switching module includes a moving contact mechanism and a stationary contact group. The first and second stationary contacts of the stationary contact group are arranged side-by-side along a third direction d3. Each moving contact mechanism is movable as a whole along a first direction d1. Its electromagnetic system includes a magnetizing component and an armature arranged sequentially with the switching unit along the third direction d3. The magnetizing component includes a yoke and a coil assembly. The armature drives each moving contact mechanism to move as a whole, thereby closing and opening with the corresponding stationary contact group. The first direction d1, the second direction d2, and the third direction d3 are perpendicular to each other. The switching device has a reasonable layout and compact structure.

The application discloses a contact mechanism and a transfer switch, which comprises a moving contact assembly and a static contact group, the moving contact assembly moves along a straight line, the moving contact assembly comprises a contact support and a moving contact arranged on the contact support, a contact spring is arranged between the moving contact and the contact support, the contact spring is elastically deformed when the moving contact and the contact support relatively move, and an energy storage structure is arranged at least on one side of the moving contact assembly, the energy storage structure comprises an energy storage piece, during closing movement of the moving contact assembly, the moving contact is first locked and stopped from closing movement by the energy storage piece, the contact support continues to move to trigger the energy storage piece to move, so that the energy storage piece is unlocked from the moving contact assembly, and the moving contact assembly after being unlocked from the energy storage piece is rapidly closed to a position by the contact spring. In the application, the closing speed of the contact mechanism is improved by arranging the energy storage structure, and the service life of the contact mechanism is improved.

The invention relates to a pneumatic multi-stage linkage high-voltage relay. The relay comprises a support; the branch control unit is arranged on the support and comprises a plurality of first contact groups, and each first contact group comprises a first moving contact and two first fixed contacts; the first driving mechanism comprises an air cylinder and a first driving part, the multiple first moving contacts of the sub-control unit are connected with the first driving part, the first driving part is movably connected to the support, the air cylinder is connected with the first driving part through a transmission structure to drive the first driving part to move, and the first moving contacts move along with the first driving part; the first moving contacts can move to be in contact with or separated from the two corresponding first fixed contacts, and the plurality of first moving contacts are in synchronous contact with or separated from the corresponding first fixed contacts. Linkage control of a plurality of contact groups is realized by adopting a mode of matching cylinder driving with mechanical linkage, the influence of a high-voltage circuit is isolated, higher reliability is realized, and relatively high mechanical synchronization of a plurality of pairs of contacts in the opening and closing process is ensured.

The application discloses an electromagnetic relay with reduced occupied space, comprising a base, a magnetic circuit part and a contact part, the contact part comprising at least one normally open contact group and at least one normally closed contact group, the normally open contact group and the normally closed contact group each comprising a dynamic spring part and a static spring part matched with each other, the dynamic spring part comprising a dynamic spring sheet and a dynamic contact; the normally open contact group and the normally closed contact group are arranged along a horizontal first direction on the base, and the free end of each dynamic spring sheet is respectively provided with a dynamic contact; the free end of the dynamic spring sheet of the normally open contact group and the free end of the dynamic spring sheet of the normally closed contact group are towards different sides of a second direction perpendicular to the first direction, and the dynamic spring sheet of the normally open contact group is inclined to extend to the direction of disconnecting the contact, and / or the dynamic spring sheet of the normally closed contact group is inclined to extend to the direction of closing the contact. The contact groups are more compact, and the occupied space of the product in the first direction is reduced.

This utility model discloses a main clutch switch structure for harvesting machinery, including two contact groups. Each contact group includes a movable contact and a fixed contact. The fixed contacts are all fixed on the same insulating component. One set of fixed contacts is connected in series in the engine starting circuit to conduct when the clutch is disengaged, allowing starting. The other set of fixed contacts is connected to the input terminal of the vehicle display screen to output an alarm signal when the clutch is engaged. The two sets of movable contacts are mounted on the same movable plate, with the movable contacts and fixed contacts arranged opposite to each other. The movable plate moves through a movable mechanism.

The invention provides an integrated self-adaptive turnout switching equipment contact group. The integrated self-adaptive turnout switching equipment contact group comprises a movable contact ring, a movable contact ring U-shaped frame, a movable contact ring support shaft, a compression spring, an electric insulation compression spring support, a static contact body group and an electric insulation contact box body, the movable contact ring is fixed between two opposite U-shaped vertical faces of the movable contact ring U-shaped frame through a movable contact ring support shaft and can rotate around the axis of the movable contact ring. One end of the compression spring is sleeved in a cylindrical hole of a compression spring support; a connecting arm at the other end of the compression spring support is connected with a central rectangular through hole of a movable contact ring U-shaped frame through a bracket shaft, so that the movable contact ring U-shaped frame can swing around the bracket shaft, and the movable contact ring is in contact with a group of static contact bodies in a self-adaptive manner; the static contact body group used for being connected with the wire extends to the inner end of the box body chamber of the electric insulation contact box and is coplanar with the inner arc surface of the box body, the number of the contact groups of the integrated self-adaptive turnout switching equipment is determined, full redundancy is achieved, and the working reliability of the contact group is improved.

The application discloses a bidirectional non-polarity DC contactor arc extinguishing structure, which comprises two static contact groups and one dynamic contact group arranged in an arc extinguishing chamber of the DC contactor, the dynamic contact group can move up and down to realize the on-off between two dynamic contact points and two static contact points, a parallel magnetic field is arranged in the arc extinguishing chamber and is perpendicular to the plane where the two static contact groups and the dynamic contact group are located, the upper ends of the two static contact groups are arranged in directions away from each other and form a pair of static arc running tracks, and the two ends of the dynamic contact group are arranged in directions away from each other downward and form a pair of dynamic arc running tracks; the space between the two static arc running tracks in the arc extinguishing chamber forms a main arc extinguishing chamber, and the spaces between the static arc running tracks on the two sides and the corresponding dynamic arc running tracks form two auxiliary arc extinguishing chambers. The application has the bidirectional arc extinguishing effect, can realize the positive and negative polarity commutation, improves the breaking capacity of the product under the condition of reducing the product size, and solves the breaking capacity of the bidirectional current of the DC contactor.

The invention relates to the technical field of electronic control devices, in particular to a contact part and a relay. The contact part is provided with at least two parallel branches which are arranged in the same current path in parallel, each parallel branch is provided with a contact group, and each contact group comprises a movable contact and a static contact; at least two of the parallel branches form an alternating group; in the alternating groups, the movable contact and / or the static contact of each contact group comprises at least two electric contact layers, and each electric contact layer is arranged along the height direction of the corresponding movable contact or static contact.

The utility model relates to a circuit breaker. The circuit breaker includes: a housing; a handle pivotally mounted to the housing; the two contact groups are arranged in the shell at intervals, and each contact group comprises a static contact and a moving contact capable of moving relative to the static contact; the operating mechanism is connected between the handle and the two contact groups and is shared by the two contact groups, the operating mechanism has a locking state and an unlocking state, in the locking state, the operating mechanism can be driven by the handle to keep the respective moving contacts of the two contact groups in a state of being connected with the static contacts, and in the unlocking state, the operating mechanism can be driven by the handle to keep the respective moving contacts of the two contact groups in a state of being connected with the static contacts. The moving contacts and the static contacts of the two contact groups can be separated under the driving of the handle; and the two short-circuit opening mechanisms are respectively connected to the static contacts of the two contact groups in the shell, and the two short-circuit opening mechanisms are configured to respectively respond to a first preset current condition to drive the operating mechanism to be in an unlocking state so as to allow the static contacts to be separated from the moving contacts.