Electric switch

Abstract

The invention provides an electric switch which at least comprises an insulating shell and an internal element, the internal element is at least provided with a moving contact assembly, a static contact assembly, an electric driving assembly, a flexible connection conductor or / and a connection plate, the moving contact assembly at least comprises a moving contact support, a moving conductive piece and an alloy contact, and the static contact assembly at least comprises a static contact support and a static conductive piece. One end of the moving contact support is provided with an alloy contact, the other end is provided with a fulcrum part, and a driven part is arranged between the two ends; the movable conductive piece is in a long strip shape, or the movable conductive piece is in a U-shaped long strip shape, or the movable conductive piece is in a long strip closed loop shape, the movable conductive piece is at least provided with a flexible connection conductor, and the movable contact support is a long strip elastic piece or / and a long support piece; according to the movable conductive piece structure of the switch, the conductive sectional area, the heat dissipation surface area and more flexible connection conductor welding points are increased, the internal resistance of the switch is effectively reduced, the heat dissipation performance is improved, meanwhile, the size is smaller and more compact, and the cost is lower.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliances, and more specifically to an electrical switch. Background Technology

[0002] The switches used in existing power control systems are difficult to exceed 100A rated current under their current size and structure. Because the moving springs of conventional switches are made of copper alloy material with lower conductivity than pure copper in order to ensure elasticity and conductivity, the copper alloy material is generally made very thin due to the size of the output force of the drive device. The number of moving spring layers does not exceed five. Otherwise, the operation is unreliable and it is easy to cause malfunctions and failure to operate, which can cause serious electrical accidents, fires and personal injuries. With economic development, the power consumption of equipment is rising rapidly. Conventional switches cannot meet the current capacity growth without changing the size. Summary of the Invention

[0003] Based on the above background, in order to solve at least one of the above problems, the present invention provides a switch that reduces loop resistance, improves heat dissipation efficiency, and enables the switch to achieve small size and large capacity, thus overcoming the above problems.

[0004] This application discloses an electrical switch, comprising at least an insulating shell and internal components. The internal components include at least a moving contact assembly, a stationary contact assembly, an electrical drive assembly, a flexible conductor, and / or a connecting plate. The moving contact assembly includes at least a moving contact support, a moving conductive element, and an alloy contact. One end of the moving contact support has an alloy contact, and the other end has a fulcrum portion. A driven portion is provided between the two ends. The moving conductive element is elongated, with one end disposed on the moving contact support along with the alloy contact. At least one flexible conductor is disposed on the elongated moving conductive element. Alternatively, the moving conductive element is U-shaped, with the moving contact support disposed inside the U-shaped elongated element. At least one flexible conductor is disposed on at least one extension of the U-shaped elongated moving conductive element. Or, the moving conductive element is elongated closed-loop, with the moving contact support disposed inside the elongated closed-loop element. At least one flexible conductor is disposed on the elongated closed-loop moving conductive element. The moving contact support is an elongated elastic element and / or an elongated support element.

[0005] In this manner, the moving contact assembly consists of a moving contact support, a moving conductive element, and alloy contacts. The moving contact support is either a long strip-shaped elastic element or a long support element. The moving conductive element has three structural forms: long strip, U-shaped, and long strip closed-loop. The moving conductive element and alloy contacts are fixed on the moving contact support and rotate together with the moving contact assembly to connect or disconnect electricity with the stationary contact assembly. The layout of the moving conductive element with these three structural forms can accommodate different rated currents. Flexible conductors are welded onto the moving conductive element to conduct electrical energy to the connection plate or outside the switch. The number and cross-sectional area of ​​the flexible conductors can also be adjusted according to the rated current to achieve a small volume and large capacity. The moving contact support can be an integral long strip-shaped elastic element or a combination of a long strip-shaped elastic element and a long support element. The long strip-shaped support element can be made of metal and has a certain heat dissipation effect, which can further reduce the heat generation of the switch.

[0006] In some embodiments, the moving contact is fixedly connected to the moving conductive element by a rivet with an alloy contact.

[0007] In the above embodiments, the connection between the moving contact support and the moving conductive component is fixed by a riveted contact, which has the advantages of reliable fixing and simple process.

[0008] In some embodiments, one end of the moving contact is a hole, slot, or convex / concave feature for fixing the alloy contact, and the other end and the area between the two ends are holes, slots, or convex / concave features serving as a fulcrum and a driven portion. The extending direction of the hole, slot, or convex / concave feature for fixing the alloy contact is set at a 90-degree angle to the extending direction of the hole, slot, or convex / concave feature of the driven portion and the fulcrum.

[0009] In the above embodiments, the positional features of the fixed alloy contact on the moving contact support, such as holes, slots, or concave-convex structures, can satisfy the requirements for fixing the moving conductive component and the contact support. The contact support, as a component supporting the movement of the moving conductive component, is provided with a fulcrum and a driven portion. The fulcrum is supported by a shaft on the insulating shell, and the driven portion is connected to the drive assembly to drive the moving contact assembly to perform the closing movement. The holes in the fulcrum and the driven portion are perpendicular to the bottom surface of the insulating shell. The holes of the fixed alloy contact are set at a 90-degree angle to the extension direction of the holes in the fulcrum and the driven portion. This can reduce the thickness of the moving contact support and increase its width, giving the moving contact support sufficient elasticity.

[0010] In some embodiments, when the moving contact support is a long strip elastic member and a long support member, one end of the long strip elastic member is provided with an alloy contact, and the other end is fixedly disposed on the long support member. One end of the long support member is provided with a fulcrum portion and the other end is provided with a driven portion. The driving portion and the fulcrum portion are holes, slots, or concave-convex features.

[0011] In the above embodiments, the moving contact support can be a combination of a long strip elastic element and a long support element. The long strip elastic element can be made of a sheet material with good elasticity to improve elasticity and make the contact more reliable. The long support element can be made of a thicker material to have higher strength and high temperature resistance, or a long support element made of metal material with heat dissipation effect.

[0012] In some embodiments, when the moving contact support is a long strip elastic element, the long strip elastic element is integrally formed of elastic material, with an alloy contact at one end, a fulcrum at the other end, and a driven part between the two ends.

[0013] In the above embodiments, when the moving contact support is a long strip-shaped elastic element, it is integrally molded from elastic material, which has the advantages of simple structure, high production efficiency and low cost, and can be used in applications with slightly smaller rated current.

[0014] In some embodiments, a shaft is provided in the hole or slot or concave-convex feature of both the driven part and the fulcrum part.

[0015] In some embodiments, the shaft disposed within the hole, slot, or concave-convex feature of the driven part is a connecting rod, which is directly or indirectly driven by an electric drive component.

[0016] In some embodiments, the shaft disposed within the hole, slot, or concave-convex feature of the fulcrum portion is a fulcrum shaft, and the fulcrum shaft is disposed within the insulating housing.

[0017] In some embodiments, a stationary contact is provided on the stationary contact assembly below the alloy contact.

[0018] In some embodiments, the moving contact assembly rotates around a pivot axis to perform electrical opening and closing movements with the stationary contact.

[0019] In the above embodiments, both the driven part and the fulcrum part on the moving contact support adopt a shaft-hole mating structure. The contact support is provided with mating features for the driven part and the fulcrum part, and a shaft is provided inside the mating features. The fulcrum part uses a through shaft to support the contact support inside the insulating shell. The straight part of the driven part, which adopts a linkage structure, is inserted into the mating feature of the driven part as the output interface of the electric drive component. Under the control of the electric drive component, the moving contact component rotates around the fulcrum part, causing the alloy contact to contact or separate from the stationary contact on the stationary contact component, thereby realizing the switching on and off functions.

[0020] In some embodiments, the electric drive component is any one or any combination of more of the following: a motor gear drive component, a motor gear rack drive component, a motor gear lead screw drive component, a motor gear cam drive component, and an electromagnet drive component.

[0021] In the above embodiments, there are many ways to implement the electric drive component. It can be a motor and gear drive, a motor and rack and pinion drive, a motor and lead screw drive, a motor and gear cam drive, or an electromagnet drive, etc. All of these methods can achieve the switching on and off operations.

[0022] In some embodiments, the motor gear drive assembly includes at least an electric motor, gears and / or a worm gear.

[0023] In some embodiments, the linkage is connected between the driven part and the gear or turbine to drive the moving contact assembly to perform electrical opening and closing movements.

[0024] In the above embodiments, when a motor is used in conjunction with a gear drive, an electric motor and a gear are used for driving, or a worm gear is used to change the rotational speed and torque of the electric motor and output it to the connecting rod to make an oscillating motion. One end of the connecting rod is connected to the gear or worm gear, and the other end is engaged with the contact support shaft hole to drive the moving contact assembly to rotate around the fulcrum, thereby realizing the contact and separation of the alloy contact and the stationary contact.

[0025] In some embodiments, a portion of the connecting plate is disposed inside the insulating housing, and a portion is disposed outside the insulating housing.

[0026] In the above embodiment, part of the connecting plate is disposed inside the insulating shell and another part is disposed outside the insulating shell. The part disposed outside has a large contact area with the outside air. The connecting plate conducts most of the heat inside the switch to the outside of the insulating shell for heat dissipation, thereby effectively reducing the temperature rise of the switch.

[0027] In some embodiments, the connecting plate is disposed outside the insulating housing.

[0028] In the above embodiments, the terminal block may not be mounted on the insulating housing, but can be directly and independently outside the insulating housing, and can be electrically connected to the moving conductive parts inside the insulating housing through a flexible conductor.

[0029] In some embodiments, one end of the flexible conductor is connected to the moving conductive element, and the other end extends directly to the outside of the insulating shell or is connected to the connecting plate inside the insulating shell or to the connecting plate outside the insulating shell.

[0030] In the above embodiments, the flexible conductor welded to the moving conductive component can be connected to the connecting plate not only inside the insulating shell, but also to the connecting plate outside the insulating shell. This arrangement reduces the current carrying capacity of the connecting plate inside the insulating shell, effectively reducing the internal temperature rise of the switch. Since the flexible conductor extends to the outside of the insulating shell and connects to the connecting plate, the air circulation outside the insulating shell is good. In addition, the flexible conductor is made of multiple fine copper wires and has a certain degree of fluffiness. The exposed part of the flexible conductor has excellent heat dissipation. The current flows through the connecting plate outside the insulating shell through the flexible conductor, and its heat generation point is on the outside. Alternatively, the flexible conductor can be directly extended to the outside of the insulating shell and directly connected to the external interface, which also has good heat dissipation and a simple structure. In this way, the rated current can be higher and the temperature rise can be lower within the limited volume of the switch.

[0031] In some embodiments, an alloy shunt is provided in the middle of the connecting plate, and the shunt is outside the insulating housing.

[0032] In the above embodiment, an alloy shunt is set in the middle of the connecting plate. The shunt is made of copper alloy and its resistance characteristics are different from those of the connecting plate. When the switch is energized, a voltage drop will be generated across the shunt. The resistance of the shunt remains unchanged, and the magnitude of the voltage drop is proportional to the magnitude of the current. The shunt is used to monitor the current of the switch and, together with the electric drive component, to control the timing of the switch's turn-off.

[0033] In some embodiments, one end of the flexible conductor is connected to the moving conductive element, and the other end is connected to the connecting plate on the right side of the alloy shunt.

[0034] In the above embodiment, one end of the flexible conductor is connected to the moving conductive component, and the other end is connected to the connecting plate on the right side of the alloy shunt. The connecting plate on the left side of the alloy shunt is connected to the external interface. When energized, the current flows from the external interface through the connecting plate, then through the alloy shunt, then through the connecting plate again, and then through the flexible conductor to the moving conductive component. By connecting the alloy shunt in series to the circuit, it serves to monitor the magnitude of the loop current.

[0035] The beneficial effects of this invention are as follows:

[0036] 1. The traditional switch structure, where the moving spring also conducts electricity, is changed to a structure where the moving contact supports the surrounding moving conductive element. The moving conductive element does not need to participate in elastic deformation and can be made of pure copper, which has good conductivity. The moving contact support does not need to participate in conduction and can be made of steel sheet, which is less expensive. This makes the structure simpler and easier to process than the traditional multi-layer copper alloy moving spring. Multiple flexible conductors can be set on the moving conductive element to connect with the connecting plate. The number of flexible conductors and the thickness of the moving conductive element can be increased or decreased according to the rated current of the switch, resulting in a small size and high capacity.

[0037] 2. The moving contact support can be made into an integral long elastic component or / and a combination of long support components. The long support component is made of metal parts, which have high strength, good high temperature resistance, and fast heat conduction and dissipation, which can effectively reduce the temperature rise of the switch.

[0038] 3. This invention employs various types of moving conductive components. The moving conductive components are made of pure copper material with good electrical and thermal conductivity. Alloy contacts and several flexible conductors are set on the moving conductive components. Compared with the existing structure of the elastic copper alloy moving spring, its conductivity and heat dissipation are greatly improved. It can carry higher current in the existing volume and effectively reduce the temperature rise of the switch.

[0039] 4. In addition, the present invention also sets part of the connecting plate inside the insulating shell and part of it outside the insulating shell. An alloy shunt is also provided in the middle of the connecting plate outside the insulating shell for the acquisition of electrical signals. The flexible conductor is led out to the outside of the shell and connected to the connecting plate to further improve the heat dissipation efficiency of the switch, making the temperature rise of the switch lower and effectively improving the electrical load capacity of the switch. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the switch structure according to the first embodiment of the present invention;

[0042] Figure 2 for Figure 1 The diagram shows a schematic of the structure supporting the moving contact.

[0043] Figure 3 This is a schematic diagram of the switch structure according to the second embodiment of the present invention;

[0044] Figure 4 and Figure 5 This is a schematic diagram of the switch structure according to the third embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram of the structure of the electric drive component and the moving contact component in this invention;

[0046] Figure 7 This is a schematic diagram showing the connection between the flexible conductor and the external connecting plate of the insulating shell in this invention;

[0047] Figure 8This is a schematic diagram of the switch structure according to the fourth embodiment of the present invention;

[0048] Figure 9 This is a schematic diagram of the moving contact support structure according to the fourth embodiment of the present invention;

[0049] Figure 10 This is a schematic diagram of the switch structure according to the fifth embodiment of the present invention. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this invention. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this invention, and should not be construed as limiting the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0051] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0052] First embodiment:

[0053] Please refer to Figure 1 and Figure 2This application provides a switch, including at least an insulating housing 100 and internal components. The internal components include at least a moving contact assembly 200, a stationary contact assembly 300, an electric drive assembly 500, a flexible conductor 600, and a connecting plate 400. The moving contact assembly 200 includes at least a moving contact support 250, a moving conductive element 230, and an alloy contact 240. One end of the moving contact support 250 has an alloy contact 240, the other end has a fulcrum 222, and a driven portion 221 is located between the two ends. The moving conductive element 230 is a long, closed-loop shape. The moving contact support 250 is disposed inside the long, closed-loop shape. Three flexible conductors 600 are disposed on the long, closed-loop conductor. 50 consists of a long strip elastic member 210 and a long support member 220. A stationary contact 310 is provided on the stationary contact assembly 300 below the alloy contact 240. The moving contact support 250 and the moving conductive member 230 are fixedly connected by a rivet with an alloy contact. One end of the moving contact support 250 is a hole for fixing the alloy contact 240. The other end and the area between the two ends are hole-like features serving as a fulcrum portion 222 and a driven portion 221. The extension direction of the hole fixing the alloy contact is set at a 90-degree angle to the extension direction of the holes of the driven portion 221 and the fulcrum portion 222. In this embodiment, the hole fixing the alloy contact extends along the X direction, and the holes of the driven portion 221 and the fulcrum portion 222 extend along the Z-axis direction.

[0054] It should be noted that the hole-like features serving as the fulcrum 222, the driven part 221, and the fixing alloy contact 240 are not limited to holes; they can also be slots or concave-convex features to achieve the same effect. One end of the elongated elastic member 210 is provided with the alloy contact 240, and the other end is fixedly mounted on the elongated support member 220. One end of the elongated support member 220 is provided with the fulcrum 222, and the other end is provided with the driven part 221. The driving part 221 and the fulcrum 222 are hole-like features. A shaft is provided within the holes of both the driven part 221 and the fulcrum 222. The shaft provided within the hole of the driven part 221 is a connecting rod 700, which is directly or indirectly driven by the electric drive assembly 500. The shaft installed in the hole of the fulcrum part 222 is the fulcrum shaft 800. The fulcrum shaft 800 is installed inside the insulating shell 100. The moving contact assembly 200 rotates around the fulcrum shaft 800 and performs electrical opening and closing operations with the stationary contact assembly 300. Part of the connecting plate 400 is installed inside the insulating shell 100, and part is installed outside the insulating shell 100. Part of the connecting plate 400 is installed outside the insulating shell 100, with a large contact area with the outside air. The connecting plate 400 conducts most of the heat inside the switch to the outside of the insulating shell 100 for heat dissipation, effectively reducing the temperature rise of the switch. Part of the connecting plate 400 is installed inside the insulating shell to connect with the flexible conductor 600 and fix it to the insulating shell.

[0055] In this embodiment, the moving conductive element 230 is overlapped and fixed around the moving contact support 250. The alloy contact 240 is a riveted contact, passing through one end of the moving contact support and the moving conductive element 230 located on the upper and lower sides of the moving contact support 250, and is fixed by riveting, so that the alloy contact 240, the moving contact support 250, and the moving conductive element 230 are firmly fixed together. The alloy contact 240 is made of copper or silver alloy to ensure contact reliability and resistance to electrical corrosion. The alloy contact 240 performs contact and conduction functions. The moving conductive element 230 performs conduction. The moving contact support 250 serves as support and elastic pressure output, so that the alloy contact 240 can reliably press against the stationary contact 310 when closed or quickly separate from the stationary contact 310 when separated, realizing the switching function of connecting and disconnecting electricity.

[0056] The upper surface of the moving conductive component 230 is connected to a plurality of flexible conductors 600. In this embodiment, three flexible conductors 600 are provided. One of the flexible conductors 600 is welded to the back of the alloy contact 240, and the other end of the flexible conductor 600 is connected to the connecting plate 400.

[0057] The moving contact support 250 is provided with a driven part 221 and a fulcrum part 222. The moving contact support 250 serves as a support for the moving contact assembly 200 and needs to support the entire moving contact assembly 200 to perform electrical switching movements within the insulating shell 100. The movement mode is rotational movement, but other movement modes are also possible, such as rotation, translation, swinging, etc. In the case of rotation, a fulcrum part 222 needs to be set on the moving contact support 250. The fulcrum part 222 rotates with the insulating shell 100. The moving contact support 250 is also provided with a driven part 221 as an output interface of the electrical drive assembly 500. The electrically driven assembly 500 controls the switching on and off functions.

[0058] Specifically, a connecting rod 700 is provided between the electric drive assembly 500 and the driven part 221. The connecting rod 700 is directly or indirectly driven by the electric drive assembly 500. The connecting rod 700 is approximately U-shaped. The driven part 221 has a hole structure, and the fulcrum part has a hole structure. The two holes are arranged one behind the other, and a shaft is provided in each hole. The shaft passing through the hole of the driven part 221 is the U-shaped bottom rod of the connecting rod 700. The fulcrum shaft 800 provided in the hole of the fulcrum part 222 is provided inside the insulating shell 100. The moving contact assembly 200 rotates around the fulcrum shaft 800, and performs the electric opening and closing operation with the stationary contact assembly 300. In this embodiment, the driven part 221 on the moving contact support 250... Both 21 and fulcrum 222 adopt a shaft-hole fit structure. The moving contact support 250 is provided with a hole for the driven part 221 and a hole for the fulcrum 222. The two holes are arranged front and back and maintain a certain distance. A shaft is installed in the two holes. The fulcrum 222 uses a metal through shaft to support the contact support 220 in the insulating shell 100. The driven part 221 uses the straight part (U-shaped bottom rod) of the connecting rod 700 inserted into the hole of the driven part 221 as the output interface of the electric drive assembly 500. The electric drive assembly 500 controls the moving contact assembly 200 to rotate around the fulcrum, causing the alloy contact 240 to contact or separate from the stationary contact 310 on the stationary contact assembly 300, thereby realizing the switching on and off functions.

[0059] The moving contact support 250 is composed of a long strip elastic element 210 and a long support element 220. The moving long support element 220 is made of insulating or metal parts. Metal parts have high strength and high heat resistance or heat dissipation, and are suitable for high current switches. Insulating parts can be made of materials such as plastic and ceramics. Plastics are easy to process and have high production efficiency, but their high temperature resistance is slightly poor, so they can be used in small-sized switches. Ceramics have higher cost and high temperature resistance. The specific material selection can be flexibly chosen according to the actual application scenario.

[0060] The moving conductive component 230 is made of pure copper, which has good conductivity and heat dissipation. It is designed as a long strip closed-loop structure to increase the heat dissipation area and conductive cross section according to the heat dissipation requirements. The moving conductive component 230 is then connected to the connecting plate 400 through three flexible connecting conductors 600, which greatly improves the current carrying capacity of the switch and also has good heat dissipation, effectively improving the electrical load capacity of the switch.

[0061] Second embodiment:

[0062] like Figure 3As shown, this application provides a switch according to a second specific embodiment. The difference from the first embodiment is that the movable conductive element 230 is a U-shaped elongated strip, the movable contact support 250 is disposed inside the U-shaped elongated strip, two flexible connecting conductors 600 are disposed on the two ends of the U-shaped elongated strip, and another flexible connecting conductor 600 is disposed behind the alloy contact 240. The movable conductive element 230 is arranged in a U-shaped opening around the periphery of the movable contact support 250, that is, the movable conductive element 230 is partially surrounded by a U-shape, and the movable conductive element 230 is fixed to the elongated strip. On the shaped elastic element 210, one end extends to the front of the elongated support element 220, and the other end extends to the bottom of the elongated support element 220. One of the three flexible connecting conductors 600 is connected to the back of the alloy contact 240, and the other two are respectively connected to the two ends of the moving conductive element 230. The moving conductive element 230 is a conductive part, and the amount of enclosure can be set according to the rated current of the switch. If the rated current is large, a full enclosure can be used, and if the rated current is slightly smaller, a half enclosure can be used to reduce the amount of copper material used and save costs.

[0063] Third embodiment:

[0064] like Figure 4 and Figure 5 As shown, this application provides a switch according to a third specific embodiment. The difference from the first embodiment is that the moving conductive element 230 is elongated, with one end disposed on the moving contact support 250 along with the alloy contact 240. A flexible conductor 600 is disposed on the elongated moving conductive element. The moving conductive element 230 is attached to the upper or lower part of the elongated elastic element 210. Figure 4 The movable conductive element 230 shown is disposed above the elongated elastic element 210. Figure 4 The movable conductive element 230 shown is disposed below the elongated elastic element 210. A flexible connecting conductor 600 is welded between the back of the alloy contact 240 and the extension conductor 420 of the connecting plate 400. A flexible connecting conductor 600 is welded between the end of the movable conductive element 230 and the connecting plate 400. The number and cross-sectional area of ​​the flexible connecting conductor 600 are related to the rated current. The larger the rated current, the more flexible connecting conductors 600 there are and the thicker the cross-sectional area.

[0065] like Figure 6As shown, in some embodiments, the electric drive assembly 500 is a motor-gear drive assembly, which includes at least: an electric motor 510, a gear 520 and / or a worm gear 540, and a worm 530. A connecting rod 700 is connected between the driven part 221 and the gear 520, driving the moving contact assembly 200 to perform electric opening and closing movements. The electric drive assembly 500 can be implemented in many ways, including a motor-gear drive, a motor-rack and pinion drive, a motor-screw drive, or a motor-cam drive. The switching operation can be achieved by means of electric motor or electromagnet drive. When the motor is used in conjunction with gear drive, the electric motor 510 and gear 520 are used for drive, or the rotation speed and torque of the electric motor 510 are transformed and output to the connecting rod 700 to make swing motion by means of worm gear 540 and worm 530. One end of the connecting rod 700 is connected to the gear 520 or worm gear 540, and the other end is connected to the driven part 221 of the moving contact support 250, which pushes the moving contact assembly 200 to rotate around the fulcrum, so as to realize the contact and separation of the alloy point 240 and the stationary contact 310 of the stationary contact assembly 300.

[0066] like Figure 7 As shown, in some embodiments, a portion of the connecting plate 400 is disposed inside the insulating housing 100, and another portion is disposed outside the insulating housing 100. The portion disposed outside has a large contact area with the outside air. The connecting plate 400 conducts most of the heat inside the switch to the outside of the insulating housing 100 for heat dissipation, thereby effectively reducing the temperature rise of the switch. An alloy shunt 410 is disposed in the middle of the connecting plate 400. The shunt is made of copper alloy and its resistance characteristics are different from those of the connecting plate 400. When the switch is energized, a voltage drop will be generated across the shunt. The resistance of the shunt remains unchanged, and the magnitude of the voltage drop is proportional to the magnitude of the current. The voltage change across the alloy shunt 410 is used to monitor the current of the switch, and the electrical drive component 500 is used to control the timing of the switch's turn-off.

[0067] In some embodiments, the flexible connecting conductor 600 disposed on the back of the alloy contact 240 and the moving conductive element 230 is connected to the connecting plate 400 disposed outside the insulating housing 100. The connection point between the flexible connecting conductor 600 welded to the back of the alloy contact 240 and the moving conductive element 230 and the connecting plate 400 can be welded not only inside the insulating housing 100, but also to the connecting plate 400 outside the insulating housing 100. This arrangement reduces the current carrying capacity of the connecting plate 400 inside the insulating housing 100, effectively reducing the internal temperature rise of the switch. Because the flexible conductor 213 conductor 600 is led out to the outside of the insulating shell 100 and connected to the connecting plate 400, the air circulation outside the insulating shell 100 is good. In addition, the flexible conductor 600 is made of multiple fine copper wires and has a certain degree of fluffiness. The exposed part of the flexible conductor 600 has a good heat dissipation effect. The current flows through the flexible conductor 600 on the connecting plate 400 outside the insulating shell 100. Its heat point is on the outside, and the heat dissipation efficiency of the connecting plate 400 itself is also very high. In this way, the rated current can be higher and the temperature rise can be lower within the limited volume of the switch.

[0068] Fourth embodiment:

[0069] like Figure 8 , 9 As shown, this application provides a switch according to a fourth specific embodiment. The difference from the first embodiment is that the moving contact support 250 is a long strip elastic element 210, which is integrally formed from elastic material. One end is provided with an alloy contact 240, the other end is provided with a fulcrum 222, and a driven part 221 is provided between the two ends. The moving conductive element 230 is a long strip closed loop, and the moving contact support 250 is disposed inside the long strip closed loop. Three flexible connecting conductors 600 are provided on the long strip closed loop conductor. The flexible connecting conductors 600 extend to the outside of the insulating shell 100. This arrangement of the moving contact support has the advantages of simple structure, low cost, and high production efficiency. The flexible connecting conductors 600 are directly led out to the outside of the insulating shell 100 without the need for a connecting plate 400. The flexible connecting conductors are directly electrically connected to the external interface, which has the effect of simple structure and low cost.

[0070] Fifth embodiment:

[0071] like Figure 10 As shown, the switch of the fifth specific embodiment provided in this application differs from other embodiments in that the connecting plate 400 is disposed outside the insulating shell 100. The connecting plate may not be disposed on the insulating shell, but can be directly and independently outside the insulating shell, and can be electrically connected to the moving conductive component inside the insulating shell through a flexible connecting conductor.

[0072] In some embodiments, one end of the flexible conductor is connected to the moving conductive element, and the other end is connected to the connecting plate on the right side of the alloy shunt. The connecting plate on the left side of the alloy shunt is connected to the external interface. When energized, the current flows from the external interface through the connecting plate, then through the alloy shunt, then through the connecting plate again, and then through the flexible conductor to the moving conductive element. By connecting the alloy shunt in series with the circuit, it serves to monitor the magnitude of the loop current.

[0073] This invention may be implemented in other specific forms without departing from its spirit and essential characteristics. The present embodiments are to be regarded in all respects as exemplary rather than limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and all modifications falling within the meaning of the claims and their equivalents are thus included within the scope of the invention.

Claims

1. An electrical switch, comprising at least an insulating housing and internal components, said internal components including at least a moving contact assembly, a stationary contact assembly, an electrical drive assembly, a flexible conductor and / or a connecting plate. The moving contact assembly includes at least a moving contact support, a moving conductive element, and an alloy contact. The moving contact is supported by an alloy contact at one end, a fulcrum at the other end, and a driven part between the two ends; The moving conductive element is elongated and strip-shaped, with one end disposed on the moving contact support along with the alloy contact. At least one flexible conductor is disposed on the elongated moving conductive element. Alternatively, the movable conductive element may be a U-shaped strip, with the movable contact supported inside the U-shaped strip. At least one flexible conductor may be provided on at least one extension of the U-shaped movable conductive element. Alternatively, the moving conductive component may be in the form of a long, closed loop, with the moving contact supported inside the long, closed loop. At least one flexible conductor may be provided on the long, closed loop moving conductive component. The moving contact support is a long strip elastic element or / and a long support element.

2. A switch according to claim 1, characterized in that, The moving contact is fixedly connected to the moving conductive component by a rivet with an alloy contact.

3. A switch according to claim 1, characterized in that, The moving contact has a hole, slot, or concave-convex feature at one end for fixing the alloy contact, and a hole, slot, or concave-convex feature between the other end and the two ends as a fulcrum and a driven part. The extension direction of the hole, slot, or concave-convex feature for fixing the alloy contact is set at a 90-degree angle to the extension direction of the hole, slot, or concave-convex feature of the driven part and the fulcrum.

4. A switch according to claim 1, characterized in that, When the moving contact support is a long strip elastic element and a long support element, one end of the long strip elastic element is provided with an alloy contact, and the other end is fixedly mounted on the long support element. One end of the long support element is provided with a fulcrum part, and the other end is provided with a driven part. The driving part and the fulcrum part are holes, slots, or concave-convex features.

5. A switch according to claim 1 or 3, characterized in that, When the moving contact support is a long strip elastic element, the long strip elastic element is integrally formed of elastic material, with an alloy contact at one end, a fulcrum at the other end, and a driven part between the two ends.

6. A switch according to claim 3, 4, or 5, characterized in that, A shaft is provided in the holes, slots, or concave-convex features of both the driven part and the fulcrum part.

7. A switch according to claim 6, characterized in that, The shaft provided within the hole, slot, or concave-convex feature of the driven part is a connecting rod, which is directly or indirectly driven by an electric drive component.

8. A switch according to claim 6, characterized in that, The shaft provided within the hole, slot, or concave-convex feature of the fulcrum portion is the fulcrum shaft, and the fulcrum shaft is disposed within the insulating shell.

9. A switch according to claim 1, characterized in that, A stationary contact is provided on the stationary contact assembly below the alloy contact.

10. A switch according to claim 8, characterized in that, The moving contact assembly rotates around the pivot axis, and performs electrical switching with the stationary contact.

11. A switch according to claim 7, characterized in that, The electric drive component is any one or any combination of more of the following: a motor gear drive component, a motor gear rack drive component, a motor gear lead screw drive component, a motor gear cam drive component, and an electromagnet drive component.

12. A switch according to claim 11, characterized in that, The motor gear drive assembly includes at least an electric motor, gears and / or a worm gear.

13. A switch according to claim 12, characterized in that, The connecting rod is connected between the driven part and the gear or turbine, and drives the moving contact assembly to perform electrical opening and closing operations.

14. A switch according to claim 1, characterized in that, Part of the connecting plate is located inside the insulating shell, and part of it is located outside the insulating shell.

15. A switch according to claim 1, characterized in that, The connecting plate is located outside the insulating shell.

16. A switch according to claim 1, characterized in that, One end of the flexible conductor is connected to the moving conductive component, and the other end extends directly to the outside of the insulating shell or is connected to the connecting plate inside the insulating shell or to the connecting plate outside the insulating shell.

17. A switch according to claim 14, characterized in that, An alloy shunt is disposed in the middle of the conductor, and the alloy shunt is located outside the insulating shell.

18. A switch according to claim 17, characterized in that, One end of the flexible conductor is connected to the moving conductive component, and the other end is connected to the connecting plate on the right side of the alloy shunt.

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