1279results about "Contacts" patented technology

The contactor comprises an electromagnetic assembly, a static contact and a movable assembly, the movable assembly comprises a movable contact, a first elastic part and a driving part which are connected, and the first elastic part is configured to generate elastic force supporting the movable assembly; the driving component is configured to generate electromagnetic driving force through a magnetic field generated by the electromagnetic assembly, and the controller is configured to control a movable contact and a static contact of the movable assembly to be closed and respond to the fact that the sensor detects that the driving component generates displacement based on electric repulsive force generated by current flowing through the movable contact and the static contact. And controlling the electromagnetic assembly to adjust the generated magnetic field so as to reduce electromagnetic driving force which is generated by the driving part according to the generated magnetic field and is opposite to the electric repulsive force, so that the movable contact is not closed with the static contact again. According to the contactor disclosed by the invention, fusion welding of the movable contact and the static contact in the short circuit process can be prevented, so that the contactor fault is avoided, and the equipment reliability is improved.

The invention relates to a method for preparing a carbon nanotube reinforced copper-silver-based electrical contact composite material based on a liquid phase atomization method, and belongs to the technical field of electrical contact preparation. The preparation method comprises the following steps: carrying out hot pressed sintering on mixed powder of reinforcement powder, copper powder and silver powder, solidifying the powder to form an Ag-coated CNTs / Cu-Ag composite material block, and then preparing the Ag-coated CNTs reinforced Cu-Ag-based electrical contact composite material through a process route of solid solution, extrusion and aging. The preparation method disclosed by the invention is simple to operate and stable in preparation process, and the mechanical and electrical properties of the prepared composite material can respectively reach 157HV and 103% IACS (International Annealed Copper Standard) and above; according to the method, ablation and damage of the surface of the electrical contact in the working process are relieved, the viscosity of a molten pool is increased, the contact resistance in the electrical contact process can be reduced, the current concentration phenomenon and the temperature rise effect at a contact point can be relieved, the mass loss of an electrical contact material is reduced, the maintenance cost is reduced, and the method has good application prospects in the field of electrical contact materials.

The invention relates to the technical field of load switches, in particular to a load switch and a ring main unit thereof, the load switch comprises a cabinet body, a cabinet door, a support frame, a sleeve, a static contact and a moving contact, the cabinet door is hinged to the cabinet body, the support frame is fixedly connected with the inner wall of a shell, both the sleeve and the static contact are fixedly connected with the support frame, and a control rod is further hinged to the support frame; the movable contact is slidably connected to the sleeve, one end of the movable contact is hinged to the control rod, a spray head is fixedly installed in the sleeve, and a plurality of first cleaning pipelines and second cleaning pipelines are arranged in the spray head. The cleaning assembly cleans carbon deposits on the surfaces of the moving contact and the static contact, and the problems that the contacts are powered off due to carbon deposits on the contacts, an electric appliance cannot work normally, and the service life of the electric appliance is shortened are solved.

A system includes a circuit protection device (CPD) having an input coupled to an aircraft power generator and an output coupled to an aircraft electrical load. A shorting switch is coupled to the input of the CPD. The shorting switch, when closed, provides a fault current path that returns to the aircraft power generator and avoids passing through the CPD and the aircraft electrical load. A controller, based upon the voltage measurements from one or more voltage sensors and current measurements from at least one current sensor selectively opens and closes one or more of the CPD and the shorting switch.

The invention discloses an integrated sealed primary and secondary fusion pole-mounted circuit breaker in the technical field of circuit breakers, and the integrated sealed primary and secondary fusion pole-mounted circuit breaker comprises a case, a push-pull mechanism, a first elastic mechanism and a second elastic mechanism. A plurality of sets of insulating pull rods extending into the circuit breaker body are installed in the case in an up-down sliding mode, the push-pull mechanisms are fixedly installed in a plurality of sets of supports in the case in a rotating mode, and the top ends of the push-pull mechanisms are fixedly connected with the bottom ends of the insulating pull rods. The two sides of the support are symmetrically provided with two groups of first elastic mechanisms connected with the push-pull mechanism, and the problems that the speed of a movable contact block in an existing circuit breaker cannot be effectively buffered when the movable contact block rapidly gets close to or gets away from a static contact block, and the elastic mechanisms in the circuit breaker are inconvenient to efficiently synchronize energy storage and pressure release of a closing spring and an opening spring; and the operation efficiency, the reliability, the synchronism, the arc extinguishing performance and the like of the circuit breaker are not improved.

A micro-electrical-mechanical-system (MEMS) switching device including a first MEMS switch having a first and second terminal, and a second MEMS switch having a third and fourth terminal. The device also includes first and second input conductors, and first and second output conductors. The first input conductor electrically connects the second terminal to the third terminal. The second input conductor electrically connects an input port to the first input conductor. The first output conductor electrically connects a first output port to the first terminal. The second output conductor electrically connects a second output port to the fourth terminal. A first path from the input port to the first output port, and a second path from the input port to the second output port, have substantially identical electrical characteristics.

The invention relates to the technical field of power equipment, in particular to a vacuum pole-mounted circuit breaker, which comprises a vacuum arc-extinguishing chamber and a mechanism box, a static contact and a moving contact are inserted in the vacuum arc-extinguishing chamber, and under the action of the mechanism box, the moving contact can be close to or far away from the static contact and can be conducted with the static contact; a conductive part is arranged between the static contact and the moving contact, the conductive part can generate elastic deformation, can be in stop fit with the static contact or the moving contact, and is configured to be conducted with the static contact and the moving contact before the static contact and the moving contact are conducted. Therefore, the problem of arc erosion between the static contact and the moving contact is effectively avoided in a mode of transferring an arc generation position, the bounce amplitude of the moving contact is reduced by utilizing the elastic deformation characteristic of the conductive part, the service life of the static contact and the moving contact can be ensured while the wear of the static contact and the moving contact is reduced, and the service life of the static contact and the moving contact is prolonged. And the conductivity between the static contact and the moving contact can be ensured.

The utility model discloses a primary and secondary fusion outdoor pole-mounted circuit breaker, which belongs to the technical field of circuit breakers, and comprises a mounting rack, an operating mechanism mounted at the top of the mounting rack, a plurality of vacuum circuit breakers mounted at the top of the operating mechanism, and the operating mechanism used for driving the vacuum circuit breakers to open and close. A plurality of insulators I and insulators II are fixedly mounted at the top of the mounting frame, a group of knife switch assemblies are arranged at the tops of the insulators II, closing assemblies are arranged at the tops of the insulators I, and fixed knife switches and movable knife switches are mounted on brake bars in the knife switch assemblies; a plurality of telescopic springs are installed between the fixed disconnecting link and the movable disconnecting link to push the movable disconnecting link outwards, so that the movable disconnecting link can be tightly attached to an abutting plate on a brake base during closing, electric arcs caused by poor contact due to structure looseness after long-time use are prevented, and the use safety is improved.

The invention relates to the technical field of computational material science, in particular to a high-entropy ceramic phase change strengthened silver-based electric contact material component screening method, which comprises the following steps of: firstly, based on first principle calculation and Monte Carlo molecular dynamics simulation, combining experimental data correction, and screening out a (MgCoNiCuZn) O component proportion of which the phase change temperature is close to a silver melting point and the single-phase enthalpy value is high; secondly, dynamically simulating wetting behaviors of liquid silver and O with different component proportions (MgCoNiCuZn) through molecular dynamics, and selecting a component proportion with the best wettability with the liquid silver in combination with phase boundary energy calculation and wetting angle experimental verification; and finally, preparing a sample based on spark plasma sintering, actually measuring a wetting angle by using a seat drop method, and feeding back and correcting simulation parameters to form closed-loop optimization. The method is suitable for wettability collaborative optimization screening of a rare earth element doped high-entropy oxide system and liquid metal, proper components can be efficiently and accurately screened out, and the performance of the silver-based electric contact material is improved.

According to one embodiment of the present disclosure, a vacuum circuit breaker may include: a pressure vessel filled with an insulating gas of a predetermined pressure; a vacuum interrupter provided inside the pressure vessel and having a fixed electrode and a movable electrode in a vacuum tube in a vacuum state; a bellows provided to seal a gap between the vacuum tube and the movable electrode; a movable rod, one end of which is connected to an end portion of the movable electrode via an insulating link, and which is capable of penetrating the pressure vessel and reciprocating in an axial direction while maintaining airtightness; a drive rod which is provided outside the pressure vessel at the other end of the movable rod and which transmits the driving force of the drive unit to the movable rod; and a contact pressure spring, one end of which is supported by the movable rod and the other end of which is supported by the driving rod, in which a ratio of a self-closing force of the vacuum interrupter to a minimum closed contact pressure is set to a predetermined ratio.

The utility model belongs to the technical field of electromagnetic switches, and particularly relates to an electromagnetic switch with an indicating lamp, which comprises a bottom shell, a top cover, a closing button, an opening button, the bottom shell and a contact pin seat assembled by a buckle, a first contact pin and a second contact pin are assembled on the contact pin seat, and an electromagnetic coil is assembled on one side of an inner cavity of the bottom shell through a mounting frame. A moving seat is assembled on the contact pin seat in a sliding mode, a movable contact plate is arranged on the moving seat through a first spring, the warped plate drives the moving seat to move up and down in a reciprocating mode when swinging, connection and disconnection of the first contact pin and the second contact pin are achieved, a second spring is connected between the moving seat and the top cover, and a sleeve seat is arranged on the top cover. The second lead is propped against the second contact pin through a third spring in the sleeve seat; according to the utility model, the contact pin seat and the bottom shell are assembled in a buckling manner, so that quick disassembly and reassembly during maintenance are facilitated, the electromagnetic switch does not need to be integrally disassembled, the maintenance time and cost are greatly saved, the electrical connection is more reliable, and the stability and durability of the whole structure are improved.

The invention relates to the technical field of circuit breaker isolation switch equipment, and discloses a circuit breaker isolation switch of a primary and secondary fusion ring main unit, which comprises a mechanism box body, an installation space is arranged in the mechanism box body, and the top of the mechanism box body is fixedly connected with a plurality of airtight insulators. According to the invention, when the contact piece is arranged and the disconnecting switch part needs to be switched on, the operation switch is firstly rotated reversely, the rotating shaft rotates to drive the connecting contact at one end of the isolating rod at one end of the operation insulator to approach, and the connecting inclined block is arranged to be inclined, so that the collision phenomenon caused by inaccurate alignment of the isolating rod and the connecting contact can be avoided; the isolating rod is aligned and connected with the connecting contact, so that the connecting contact is protected from being damaged due to collision between the connecting contact and one end of the isolating rod on one hand, and the butt joint accuracy of the connecting contact at one end of the isolating rod on the other hand is improved on the other hand.

To prevent upsizing of an electromagnetic relay while reducing an impact on the operation of an auxiliary contact part by a main contact part.SOLUTION: An electromagnetic relay comprises a base, a first fixed terminal, a first fixed contact, a second fixed terminal, a second fixed contact, a main contact part, a coil part, an auxiliary contact part, and a second moving member. The main contact part includes a movable contact piece, a first movable contact, a second movable contact, and a first moving member. The movable contact piece extends in a lateral direction. Between a first closed position and a first open position, the first moving member is movable in a moving direction perpendicular to the lateral direction. The main contact part is supported by the base in a supporting direction perpendicular to the lateral direction and the moving direction. The coil part is supported by the base in the supporting direction. The auxiliary contact part includes an auxiliary fixed terminal, an auxiliary movable terminal, and an auxiliary movable contact. In the moving direction of the first moving member, the auxiliary contact part is disposed opposite to the main contact part with respect to the coil part. The second moving member moves in the moving direction in conjunction with the first moving member.SELECTED DRAWING: Figure 2

The invention provides a graphene reinforced copper-based electrical contact material and a preparation method thereof. The electrical contact material comprises the following raw materials in percentage by mass: 15-35% of tungsten powder, 1-10% of chromium powder, 1-5% of molybdenum powder, 0.1-1% of cerium oxide powder, 0.5-2% of copper-based graphene powder and the balance of copper powder. According to the graphene reinforced copper-based electrical contact material and the preparation method thereof, surface copper-based treatment is carried out on graphene, so that the problems that the interface infiltration between graphene and copper is poor and the copper is easy to oxidize are effectively solved, and the obtained electrical contact material has excellent mechanical property, conductivity, oxidation resistance and the like.

The invention discloses a 10KV sulfur hexafluoride switch cabinet which comprises a cabinet body, a gas box is arranged in the cabinet body, a mechanism chamber is arranged on the gas box, an electric control chamber is arranged on the mechanism chamber, an operating mechanism is arranged in the mechanism chamber, a three-phase high-voltage switch assembly is arranged in the gas box, and the three-phase high-voltage switch assembly is connected with the operating mechanism. A wire inlet sleeve and a wire outlet sleeve which are matched with each phase of high-voltage switch assembly are arranged on the gas box, the wire inlet sleeve is arranged on the gas box in an inverted mode, a first cylindrical contact is fixedly arranged in the wire inlet sleeve in a sleeved mode, copper-tungsten alloy of a spiral structure is embedded in the inner circumferential wall of the first cylindrical contact, a copper wire inlet rod is vertically inserted in the first cylindrical contact, and a wire outlet rod is arranged on the wire inlet sleeve. A heat dissipation box is arranged at the upper end of the gas box, a pressure relief device is arranged at the upper end of the heat dissipation box, the heat dissipation box and the gas box are internally communicated to form a closed cavity, the closed cavity is filled with sulfur hexafluoride gas, an inflation and measurement integrated pressure gauge is mounted on the gas box, and heat dissipation fins are paved on the outer surfaces of the gas box and the heat dissipation box. The heating value can be reduced, efficient heat dissipation is achieved, and the reliability of the switch cabinet is improved.

In accordance with an embodiment, a microelectromechanical system (MEMS) switch device includes: a substrate; a switching membrane disposed above the substrate; a pull-in electrode disposed above the switching membrane; a metal contact disposed on the switching membrane; and a pull-back electrode disposed below the switching membrane, wherein the switching membrane is movable between an open position and a closed position, and wherein in the closed position, the metal contact electrically connects two RF signal lines.

The invention provides coated SnO and FeOx composite oxide powder and a silver-based composite electric contact material and a preparation method thereof, and the preparation method comprises the following steps: providing stannous mono-sulphate, dissolving, stirring to form a SnSO4 solution, and continuously reacting to obtain a solution A; adding an alkaline reaction solution into the solution A to reach a preset pH value to obtain a precursor solution; performing hydrothermal reaction on the precursor solution; washing and drying a hydrothermal reaction product to obtain SnO powder; the preparation method comprises the following steps: adding FeSO4 or FeCl2 into an aqueous solution containing SnO powder, dissolving, adding H2C2O4 to obtain a precipitate, filtering, separating, and drying; and carrying out vacuum heat treatment on the precipitate to obtain the coated SnO-coated FeOx composite oxide powder. The SnO-coated FeOx composite oxide with a controllable and adjustable valence structure can be formed, and the composite oxide is firstly applied to the field of silver-based composite electric contact, so that the Ag / SnO-coated FeOx composite electric contact material has the performance advantages of low temperature rise, long cycle life and the like in the service process.

The invention relates to the technical field of electrical contact materials, and particularly discloses a graphene modified electrical contact material and a preparation method thereof, and the preparation method comprises the following steps: preparing a polydopamine-graphene suspension; adding a copper-containing solution into the polydopamine-graphene suspension to prepare a polydopamine / copper modified graphene material; the preparation method comprises the following steps: carrying out ball-milling mixing on the following components in percentage by mass: 1-4% of a polydopamine / copper modified graphene material, 0.03-0.2% of aluminum powder, 0.3-0.8% of zirconium powder, 15-20% of copper powder and the balance of tungsten powder to obtain a mixture; the mixture is subjected to pressure forming and sintering, and the graphene modified electrical contact material is obtained. According to the preparation method, the graphene is modified, the dispersity and wettability of the graphene are improved, copper, tungsten, aluminum, zirconium and the modified graphene are compounded, and all the components act comprehensively, so that the comprehensive properties such as the mechanical property, the conductivity and the ablation resistance of the electrical contact material are improved.

The application discloses a quick closing operation mechanism of a circuit breaker, which comprises a shell, a handle, a static contact support, a movable contact support, a linkage and a tripping mechanism, the handle and the movable contact support are rotationally arranged in the shell, a contact torsional spring is arranged between the shell and the movable contact support, a long circular hole is arranged on the movable contact support, a pin shaft is arranged in the shell and passes through the long circular hole, and the movable contact support rotates relative to the pin shaft; an installation area is arranged in the shell, an energy storage limiting piece is slidably arranged in the installation area, a movable area is arranged on the handle, an abutting portion is arranged on the movable contact support, the energy storage limiting piece is provided with a moving portion and a matching portion which are arranged in the movable area, the application can make the movable contact support move beyond the stroke, is not limited to a fixed point, improves the contact force, and based on the energy storage limiting piece, the last action of closing is realized to store energy, the oxides between the movable contact and the static contact can be quickly broken down, and the overall closing effect is improved.

The utility model relates to the technical field of change-over switches, and discloses an isolation type change-over switch, which comprises a shell, an operating handle arranged on the shell, a mounting hole arranged on the operating handle, handle shafts arranged at two ends of the mounting hole, a spring I fixedly arranged in the mounting hole and between the two handle shafts, and an arc groove arranged below the operating handle, an arc groove is formed in the shell, a connecting rod is slidably arranged in the arc groove, a moving contact assembly is fixedly arranged below the connecting rod, two moving contacts are installed in the moving contact assembly, and two static contact assemblies are fixedly arranged in the shell. The positions of the two moving contacts are locked through the single second spring, the moving contacts are prevented from loosening easily, when the moving contacts are communicated with the static contacts, the second spring assists in pressing the moving contacts, if the arc groove drives the moving contacts to be separated from the static contacts, the moving contacts and the static contacts are separated in time, adhesion is not prone to occurring, the arc groove is connected with the connecting rod in a sliding mode, and the connecting rod is not prone to falling off. The transmission process is not blocked, the operation smoothness is high, the assembly operation is simple and convenient, and the segmentation efficiency of the moving contact is improved.

The invention discloses an automatic circuit breaker handcart for a switch cabinet, and belongs to the technical field of circuit breakers, the automatic circuit breaker handcart for the switch cabinet comprises a bottom frame, the bottom frame is movably provided with a circuit breaker handcart, the circuit breaker handcart is provided with a plurality of arc extinguish chambers, and the arc extinguish chambers are provided with moving contacts. A front frame is installed at one end, far away from the circuit breaker handcart, of the bottom frame, an aviation socket located on one side, far away from the circuit breaker handcart, of the front frame is arranged on the bottom frame, a signal lead is installed on the aviation socket, and a pushing assembly connected with the circuit breaker handcart is arranged between the circuit breaker handcart and the front frame. A movable transmission assembly movably connected with the pushing assembly is arranged in the bottom frame, moving assemblies movably connected with the movable transmission assembly are arranged on the two sides of the bottom frame, a camera and a temperature sensor are installed on the top of one side of the front frame, and a third contact sensor is installed on the bottom frame. The device has the advantages of intelligent detection, ordered movement, full contact of moving and static contacts, safety, reliability, convenient operation, simplicity, convenience and practicability.

The invention provides a high-sensitivity double-point contact single-pole microswitch. The high-sensitivity double-point contact single-pole microswitch comprises a base group, the base set is sleeved with a shell, and a mounting cavity is formed between the base set and the shell. An upper contact piece, a lower contact piece and a supporting frame which are connected with the base set are sequentially arranged in the installation cavity. A flat reed assembly and a bow reed are connected to the supporting frame. The shell is provided with a key, and the key is matched with the flat reed assembly to work; the support frame is provided with an inclined trapezoidal groove, and the bow reed is connected with the support frame through the inclined trapezoidal groove; the flat reed assembly comprises a flat reed, one end of the flat reed is provided with a plurality of movable contacts, and the other end of the flat reed is connected with the supporting frame. According to the double-insurance single-pole microswitch, the double-insurance problem of contact of an existing single-pole microswitch is solved, a traditional single-point contact mode of a single movable contact and a contact piece is changed into double-point contact, and a single-insurance single-pole microswitch is improved into a double-insurance single-pole microswitch under the condition that indexes such as the boundary dimension and the action characteristic of the switch are not changed; contact reliability of the switch is greatly improved, and actual requirements are met.

The utility model discloses a relay. The relay comprises a contact assembly and a stopper. The contact assembly comprises two movable spring parts which are arranged side by side, and a parallel circuit structure is formed when the two movable spring parts make contact with each other. The stop piece is arranged between the two movable spring parts and used for stopping the two movable spring parts, so that the deflection of bending deformation generated after the two movable spring parts attract each other due to the fact that current passes through the parallel circuit structure is smaller than or equal to a threshold value.

The invention discloses a copper-chromium contact with high fusion welding resistance and a preparation method thereof, and belongs to the technical field of contact materials. The preparation method comprises the steps that high-purity electrolytic chromium powder and electrolytic copper powder serve as raw materials, after acoustic resonance powder mixing is conducted, powder upsetting and cold isostatic pressing are conducted in sequence, and a green body is obtained; carrying out gradient sintering and finish machining treatment on the green body to obtain a copper-chromium electrode bar; the copper-chromium electrode bar is subjected to atomization powder making, and copper-chromium alloy powder is obtained; after the copper-chromium alloy powder is sequentially subjected to sheathing, heat treatment, seal welding and hot isostatic pressing sintering, a sheath is removed, and a prefabricated body is obtained; and after the prefabricated body is processed, the surface is remelted by green laser, and the copper-chromium contact with high welding resistance is prepared. According to the method, by improving the purity of the copper-chromium contact and optimizing the morphology and distribution of the chromium particles, the prepared contact is high in purity, the chromium particles are fine and uniform in distribution, the welding resistance and the breaking performance are excellent, and the method is suitable for a high-voltage-grade arc extinguish chamber.

Provided in the embodiments of the present disclosure are a magnetic latching relay, comprising: a base, a contact structure, a first stationary spring lead-out member, a coil assembly and a magnetic circuit structure, wherein the contact structure is arranged on the base, the contact structure has a first end and a second end in a transverse direction, the first end is provided with a first contact group, and the second end is provided with a second contact group; one end of the first stationary spring lead-out member is connected to the first end, and the other end of the first stationary spring lead-out member extends out of the base from the bottom of the base in a vertical direction; the coil assembly and the magnetic circuit structure are arranged on the base and are located on the side of the contact structure in a longitudinal direction; and when a pulse voltage is applied to the coil assembly, the magnetic circuit structure and the coil assembly can form a constant magnetic field, a first center line of the constant magnetic field in the longitudinal direction deviates from a second center line between the first contact group and the second contact group, and is closer to the second contact group, such that the constant magnetic field is far away from the first stationary spring lead-out member. The magnetic latching relay of the present disclosure has a higher stability.

This disclosure discloses an operating mechanism including a housing; a drive shaft parallel to the pivot axis of a moving contact, the drive shaft passing through and protruding from a moving contact assembly, the moving contact assembly being pivotable relative to the housing about the pivot axis of the moving contact; a pull rod configured to move between a first position and a second position; a pivot plate mounted to be pivotable relative to the housing about the pivot axis of the moving contact, the pivot plate having a first hole for connection with the drive shaft; a first pivot member, one end of which is pivotally connected to the housing; and a second pivot member, one end of which is pivotally connected to the other end of the first pivot member and the pull rod, the other end of which is pivotally connected to the pivot plate at a second hole in the pivot plate, so as to drive the pivot plate to pivot about the pivot axis of the moving contact, and thereby drive the moving contact assembly to pivot about the pivot axis of the moving contact. The distance between the second hole and the pivot axis of the moving contact is less than the distance between the pivot axes of the two ends of the first pivot member.

The utility model relates to the field of switches, in particular to a toggle switch, which comprises a switch body, the switch body comprises a toggle assembly, a contact assembly connected with the toggle assembly, and a shell used for fixing the toggle assembly and the contact assembly, the contact assembly comprises a plurality of contact strips connected with the shifting assembly and an insulating shell wrapping the contact strips, the contact strips are used for electrical connection, the insulating shell is used for isolating electricity, and the contact assembly is formed through an insert injection molding process. The problem that in the prior art, a shell and a contact terminal need to be manually assembled after being manufactured respectively is solved, the production technology is optimized, the situation that flaws and rework occur in the manual assembly process is reduced, meanwhile, the quality guarantee of the toggle switch is improved, and the manufacturability and reliability of products are effectively improved.

The utility model provides a circuit breaker, which belongs to the field of electrical equipment and comprises a shell and a connecting shaft fixed on the shell. The double-contact torsion spring comprises a first torsion spring and a second torsion spring which are connected with each other, and the first torsion spring and the second torsion spring have the same rotation direction and are arranged on the connecting shaft side by side; the double-contact torsion spring is provided with a connecting end and a free end, the free end comprises a first free end of the first torsion spring and a second free end of the second torsion spring, and the first free end is not connected with the second free end; the N-pole moving contact assembly is connected with the first free end; the L-pole moving contact assembly is connected with the second free end; when the double-contact torsion spring rotates, the N-pole moving contact assembly and the L-pole moving contact assembly can be driven to move at the same time, the contact pressure of the N-pole moving contact assembly and the contact pressure of the L-pole moving contact assembly can be controlled at the same time, the stability of the circuit breaker is guaranteed, assembling is convenient, and the manufacturing efficiency is improved.

The present application provides a key circuit, wherein the circuit includes: a plurality of keys, a plurality of driving lines, a plurality of induction lines and a control module, wherein the plurality of keys are divided into a plurality of regions according to parameters affecting force and resistance response, and resistance of the keys in each region changes with pressure within the same range; each key is connected to one driving line and one induction line, and keys in the same region are connected to the same induction line; and the plurality of driving lines and the plurality of induction lines are all connected to I / O interfaces of the control module, and are configured to transmit acquired resistance information of corresponding keys to the control module, so as to output control information corresponding to the keys via the control module.

The utility model relates to the field of low-voltage electric appliances, in particular to a circuit breaker, the length direction, the width direction and the height direction are respectively a direction d1, a direction d2 and a direction d3, and the size of a shell in the direction d2 is larger than that of the shell in the direction d3; the contact system comprises a moving contact and a static contact which are matched for use, and the rotating shaft direction of the moving contact is parallel to the direction d3; the first bus clamp and the second bus clamp are oppositely arranged in a spaced mode in the direction d3, each of the first bus clamp and the second bus clamp comprises a pair of clamping plates which are oppositely arranged in the direction d3 and used for clamping an external conductor, and each clamping plate extends to the two ends of the shell in the direction d2; the circuit breaker is higher in current carrying capacity.