Load switch

Abstract

The invention provides a load switch, and relates to the technical field of electrical equipment. The load switch comprises a shell, a driving system and a contact system, wherein the contact system comprises a first contact unit provided with a first contact part and a second contact unit provided with a second contact part; wherein the second contact unit is provided with a driving part matched with the driving system, and the second contact part is driven by the driving system to move around a rotating center on the second contact unit so as to be close to or far away from the first contact part, so that closing or opening is realized; and in an opening state, the first contact part, the rotation center on the second contact unit and the second contact part form an included angle A, and the included angle A is 15-60 degrees, so that the load switch is compact in structure and reasonable in layout and has enough electrical clearance.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, and more specifically, to a load switch. Background Technology

[0002] As a key device in power distribution systems used to connect, carry, and disconnect normal operating current, the rationality of the internal structure of load switches directly affects the electrical performance, safety, and reliability of the product. However, existing load switches generally suffer from complex internal structures and unreasonable layouts, resulting in low utilization efficiency of the internal space of the casing. Summary of the Invention

[0003] This invention provides a load switch with a reasonable layout and the ability to ensure electrical clearance.

[0004] The embodiments of the present invention can be implemented as follows: In a first aspect, the present invention provides a load switch, comprising: case; Drive system; A contact system, the contact system comprising a first contact unit having a first contact portion and a second contact unit having a second contact portion; The second contact unit is provided with a driving part that cooperates with the driving system. Under the drive of the driving system, the second contact part moves around the rotation center on the second contact unit to approach or move away from the first contact part to close or open the circuit. In the open state, the midpoint of the first contact part, the rotation center on the second contact unit, and the midpoint of the second contact part form an angle A, which is 15° to 60°.

[0005] In an optional embodiment, the included angle A is 30° to 45°.

[0006] In an optional embodiment, the load switch further includes a first terminal and a second terminal arranged at intervals along a first direction, the first terminal and the second terminal being used for connection to the contact system; The first contact unit and the second contact unit are arranged along the first direction, and along the second direction, the second contact portion is located between the rotation center on the second contact unit and the first terminal and the second terminal; Wherein, the first direction is perpendicular to the second direction.

[0007] In an optional embodiment, in the closed state, along the second direction, the rotation center on the second contact unit is located between the driving part and the second contact part.

[0008] In an optional embodiment, the first terminal is connected to the first contact unit, and the second terminal is connected to the second contact unit; in the open state, along the first direction, the rotation center on the second contact unit is located between the driving part and the second terminal; the line connecting the driving part, the rotation center and the second contact part in sequence forms an obtuse angle.

[0009] In an optional embodiment, the distance between the driving part and the rotation center is less than the distance between the rotation center and the second contact part.

[0010] In an optional embodiment, the drive system includes a drive mechanism and a transmission component. The transmission component has a first end and a second end. The first end is connected to the drive mechanism, and the second end is connected to the second contact unit to form a drive section. The drive mechanism drives the second contact unit to move through the transmission component.

[0011] In an optional embodiment, the driving mechanism includes a coil assembly, a yoke, and an armature assembly. The first end is connected to the armature assembly. The armature assembly and the coil assembly are arranged along a first direction and along a second direction. The rotation center is located between the armature assembly and the second contact portion.

[0012] In an optional embodiment, the load switch further includes a first terminal and a second terminal; along the first direction, the second contact portion is located between the first contact unit and the coil assembly; along the second direction, the second contact portion is located between the coil assembly and the first terminal and the second terminal. The second contact unit includes a second contact, and a second contact portion is disposed at one end of the second contact. In a plane perpendicular to the first direction, at least a portion of the projection of the second contact coincides with the projection of the coil assembly, and the ratio of the length of the portion of the second contact that coincides with the projection of the coil assembly to the length of the second contact is less than one-half. Alternatively, in a plane perpendicular to the first direction, the projection of the second contact does not coincide with the projection of the coil assembly.

[0013] In an optional embodiment, the axis of the coil assembly is arranged along the second direction; the armature assembly is provided with an armature shaft, the axis of which extends along a third direction perpendicular to the second direction; The load switch further includes a fixing plate connected to the housing, one end of the armature shaft is connected to the housing, and the other end is connected to the fixing plate, the fixing plate covering at least part of the transmission component.

[0014] In an optional embodiment, the second contact unit includes a second contact and a contact support, the second contact portion is disposed on the second contact, one end of the contact support is provided with a driving portion, and the other end is rotatably connected to the second contact.

[0015] In an optional embodiment, the second contact unit further includes an elastic element, one end of which is fixedly connected to the contact support, and the other end extends to form an abutment portion, which is used to abut against the second contact to provide contact pressure, and the abutment portion is located on the side of the second contact away from the first contact unit.

[0016] In an optional embodiment, the rotation center is a rotating shaft, and the contact bracket is rotatably connected to the second contact through the rotating shaft. Under the drive of the driving system, the angle by which the contact bracket can rotate around the rotating shaft is greater than the angle by which the second contact can rotate around the rotating shaft when it is open.

[0017] In an optional embodiment, the elastic element extends beyond the contact support, and the portion of the elastic element outside the contact support includes at least one U-shaped bend, with the abutment portion located between the rotation center and the second contact portion.

[0018] In an optional embodiment, the second contact unit further includes a limiting member fixed to the second contact, the limiting member being used to abut against the contact support to limit the rotational position of the second contact; Alternatively, a limiting member may be provided on the contact support, the limiting member being used to abut against the second contact to limit the rotational position of the second contact.

[0019] In an optional embodiment, the limiting member is integrally formed on the second contact, and the limiting member is located on the side of the second contact close to the first contact unit; Alternatively, the limiting member is installed on the second contact, and the limiting member includes a body for mounting with the second contact and a limiting part for abutting and cooperating with the contact bracket. The limiting part is located on the side of the second contact near the first contact unit, and the rotation center is located on the body.

[0020] In an optional embodiment, the contact support is integrally formed with the elastic element, and the contact support is made of metal.

[0021] In an optional embodiment, the contact support is made of plastic, and the contact support is provided with a through hole for forming the driving part, and the number of the through holes is one.

[0022] In an optional embodiment, the load switch further includes a flexible connection and a second lead-out connected to the second terminal block. The second lead-out is located on the side of the second contact unit away from the first contact unit. One end of the flexible connection is connected to the second contact unit, and the other end is connected to the second lead-out. The first contact unit further includes a first lead-out for connecting to the first terminal block. The load switch further includes an arc-extinguishing structure located between the first lead-out and the second lead-out.

[0023] In an optional embodiment, the arc extinguishing structure includes a stationary arc-inducing grid, a moving arc-inducing grid, and a plurality of arc-extinguishing grids. One end of the stationary arc-inducing grid is bent and extends toward the first contact unit, and the moving arc-inducing grid is electrically connected to the second lead-out member.

[0024] In an optional embodiment, the second lead-out member is provided with a clearance portion, and in the open state, at least a portion of the second contact unit is located in the clearance portion; one end of the moving arc ignition grid plate passes through the clearance portion and is connected to the second lead-out member.

[0025] In an optional embodiment, the second contact unit includes a second contact, which includes a first segment, a second segment, and a third segment connected at an angle in sequence. The first segment is used for welding a flexible connection, and the third segment is provided with the second contact portion.

[0026] In an optional embodiment, the load switch further includes a suction aid, which is used to deform and store energy when the first contact unit and the second contact are in a separated state, so as to provide a force for the second contact unit to move toward the first contact unit; the suction aid includes a fixed end and a deformable end, and along a second direction, the fixed end is located between the deformable end and the rotation center.

[0027] In an optional embodiment, the second contact unit includes at least two second contacts, which are spaced apart along a third direction, wherein the third direction, the first direction, and the second direction are perpendicular to each other.

[0028] The beneficial effects of the load switch provided in this embodiment of the invention include: by designing the second contact unit to rotate around the rotation center and controlling its geometric configuration in the open state, the angle between the first contact part, the rotation center, and the second contact part is formed within a specific range. This not only achieves reliable breaking capacity but also optimizes the spatial arrangement of internal components, which is beneficial for the miniaturization and compact design of the overall structure. Furthermore, the setting of this angle range also balances the feasibility of mechanical movement with electrical safety, avoiding insufficient opening distance due to an excessively small angle and preventing structural interference or driving difficulties due to an excessively large angle. It is evident that this layout adjustment provides sufficient installation and movement space for the second contact unit, increasing the opening distance of the contact system and achieving efficient integration of functional components in three-dimensional space, resulting in a more compact structure. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the closed state structure of a load switch according to a first embodiment of the present invention; Figure 2 This is a schematic diagram of the open state structure of a load switch according to a second embodiment of the present invention. Figure 3 This is one of the schematic diagrams of the closed state structure of the second embodiment of the load switch provided in this invention; Figure 4 This is the second schematic diagram of the closed state structure of the load switch provided in the second embodiment of the present invention; Figure 5 This is a schematic diagram of the tripped state structure of a load switch according to a third embodiment of the present invention. Figure 6 This is a schematic diagram of the closed state structure of a load switch according to a third embodiment of the present invention. Figure 7 This is a schematic diagram of the first embodiment of the contact system provided by the present invention; Figure 8 This is a schematic diagram of the second embodiment of the contact system provided in this invention. Figure 9 This is a schematic diagram of the third embodiment of the contact system provided by the present invention; Figure 10 This is a schematic diagram of the structure of the second contact unit in the first embodiment of the present invention. Figure 11 This is a schematic diagram of the structure of the second contact unit according to a second embodiment of the present invention; Figure 12 This is a schematic diagram of the third embodiment of the second contact unit provided in this invention. Figure 13 This is a schematic diagram of the first embodiment of the second contact unit and arc extinguishing structure provided by the present invention; Figure 14 This is a schematic diagram of the second embodiment of the second contact unit and arc extinguishing structure provided in this invention. Figure 15 This is a schematic diagram of the tripped state structure of a load switch according to a fourth embodiment of the present invention.

[0031] Icons: 10-Load switch; 110-Housing; 111-Mounting part; 112-First mounting area; 113-Second mounting area; 114-Avoidance area; 120-Fixing plate; 121-Dispensing port; 130-Shaft positioning plate; 200-Drive system; 210-Drive mechanism; 211-Coil assembly; 212-Yoke; 213-Armature assembly; 214-Armature shaft; 220-Transmission component; 221-First end; 222-Second end; 300-Contact system; 310-First contact unit; 311-First contact; 3111-First contact part; 3112-First lead-out; 320-Second contact unit; 321-Second contact; 3211-Second contact part; 3212-First section; 3213-Second section ; 3214 - Third segment; 322 - Drive unit; 323 - Rotation center; 324 - Contact bracket; 3241 - Pad; 3242 - Connecting shaft; 3243 - Through hole; 325 - Elastic element; 3251 - Abutment part; 326 - Limiting element; 3261 - Body; 3262 - Limiting part; 327 - Flexible connection; 328 - Second lead-out part; 3281 - Lead-out part; 3282 - Connecting part; 3283 - Clearance part; 400 - Terminal assembly; 410 - First wiring terminal; 411 - Current detection element; 420 - Second wiring terminal; 500 - Arc extinguishing structure; 510 - Static arc ignition grid; 520 - Dynamic arc ignition grid; 530 - Arc extinguishing grid; 600 - Suction aid; X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0036] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0037] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0038] As a key device in the power distribution system used to connect, carry, and disconnect normal operating current, the rationality of the internal structure of the load switch directly affects the electrical performance, safety, and reliability of the product.

[0039] However, existing load switches generally suffer from complex internal structures and unreasonable layouts, resulting in low utilization efficiency of the internal space of the housing, and the complex internal structure increases assembly difficulty and manufacturing costs.

[0040] As power distribution equipment develops towards miniaturization and high reliability, the above-mentioned problems are becoming increasingly prominent.

[0041] Therefore, there is an urgent need for a load switch design scheme with a compact structure and optimized layout. Under the premise of ensuring electrical safety distance, the functional units should be reasonably configured to improve space utilization and operational stability, so as to meet the needs of modern power systems for high-performance and high-safety switchgear.

[0042] Please see Figures 1 to 15 This invention provides a load switch 10, which includes a housing 110, a drive system 200, and a contact system 300.

[0043] The contact system 300 includes a first contact unit 310 having a first contact portion 3111 and a second contact unit 320 having a second contact portion 3211.

[0044] The second contact unit 320 is provided with a driving part 322 that cooperates with the driving system 200. Under the drive of the driving system 200, the second contact part 3211 moves around the rotation center 323 on the second contact unit 320 to approach or move away from the first contact part 3111 to close or open the circuit. In the open state, the first contact part 3111, the rotation center 323 on the second contact unit 320 and the second contact part 3211 form an included angle A, which is 15°~60°.

[0045] Specifically, the housing 110 is used to house and support the internal systems and components, and the drive system 200 provides power output to trigger the action of the contact system 300. The contact system 300 is composed of a first contact unit 310 with a first contact portion 3111 and a second contact unit 320 with a second contact portion 3211. When the circuit is closed, the two contacts each other to conduct current, and when the circuit is opened, they separate to cut off the circuit.

[0046] It should be noted that, in order to facilitate the measurement of the above-mentioned included angle, the included angle is formed by connecting the midpoints of the projections formed by the first contact part 3111, the rotation center 323 and the second contact part 3211 in sequence along a plane perpendicular to the axis of the rotation center 323.

[0047] In addition, the second contact unit 320 is provided with a driving part 322 that cooperates with the driving system 200. Under the driving action of the driving system 200, the second contact part 3211 is rotated around the rotation center 323 on the second contact unit 320 by the driving part 322, thereby realizing the action of moving closer to or away from the first contact part 3111 and completing the closing or opening operation.

[0048] In the open position, the first contact portion 3111, the rotation center 323 on the second contact unit 320, and the second contact portion 3211 form an included angle A, which is defined as an acute angle between 15° and 60°. This means that when the second contact unit 320 rotates from the closed position to the open position, its movement trajectory is not a straight line stretch, but rather an oscillation around the rotation center 323.

[0049] It is understandable that by designing the second contact unit 320 to rotate around the rotation center 323 and controlling its geometric configuration in the open state, the three points—the first contact portion 3111, the rotation center 323, and the second contact portion 3211—form an angle within a specific range. This not only achieves reliable breaking capability but also optimizes the spatial arrangement of internal components, which is beneficial for the miniaturization and compact design of the overall structure. Furthermore, the setting of this angle range also balances the feasibility of mechanical movement with electrical safety, avoiding insufficient opening distance due to an excessively small angle and preventing structural interference or driving difficulties due to an excessively large angle.

[0050] As can be seen, by adjusting the layout, sufficient installation and movement space is provided for the second contact unit 320, which increases the opening distance of the contact system 300. This achieves efficient integration of functional components of the load switch 10 in three-dimensional space, resulting in a more compact structure and improving the overall performance of the product in terms of electrical clearance and structural rationality.

[0051] Specifically, the included angle A is 30°~45°, which allows for a reasonable allocation of the movement path during contact separation while ensuring sufficient opening distance. On the one hand, this angle range helps to improve the electrical clearance after tripping, enhance insulation performance, and reduce the risk of arc reignition; on the other hand, a slightly larger included angle can also alleviate structural interference problems caused by manufacturing tolerances or assembly deviations, improving operational reliability. Furthermore, since the rotation angle is within an acceptable mechanical response range, it does not place excessive demands on the output torque of the drive system 200, thus maintaining good drive efficiency and lifespan stability.

[0052] Furthermore, the included angle A is 33°, which can take into account both the space occupied by the contact system 300 and the performance requirements such as current carrying capacity.

[0053] Furthermore, the load switch 10 also includes a terminal assembly 400, which includes a first terminal 410 and a second terminal 420. The first terminal 410 and the second terminal 420 are arranged at intervals along a first direction X. The first terminal 410 and the second terminal 420 serve as an electrical interface between the external circuit and the internal conductive path, and are used to connect to the contact system 300 to realize current input or output. Furthermore, the first terminal 410 is provided with a current sensing element 411.

[0054] The first terminal 410 is optionally electrically connected to the first contact unit 310, and the second terminal 420 is optionally connected to the second contact unit 320, so that current can be conducted from the external line to the corresponding contact unit through the terminal.

[0055] Based on this, the first contact unit 310 and the second contact unit 320 are arranged along the first direction X and along the second direction Y. The second contact portion 3211 is located between the rotation center 323 on the second contact unit 320 and the first terminal 410 and the second terminal 420. Under the driving action of the drive system 200, the second contact unit 320 can move the second contact portion 3211 towards or away from the first contact portion 3111 along the first direction X or approximately along the first direction X. This design helps to simplify the internal structural layout and improve assembly efficiency, and realizes the optimization of the layout and structure of the load switch 10. It not only ensures the sensitivity of electromagnetic response, but also optimizes the convenience of external wiring and the compactness of the internal structure.

[0056] It should be noted that the first direction X is perpendicular to the second direction Y. The first direction X is also the length direction of the mounting part, and the second direction Y is also the height direction of the mounting part. The first direction X is perpendicular to the second direction Y, that is, the angle between the first direction X and the second direction Y is 90° or close to 90°.

[0057] In the closed state, along the second direction Y, the rotation center 323 on the second contact unit 320 is located between the driving part 322 and the second contact part 3211.

[0058] In other words, in the closed state, the second contact unit 320 adopts a lever structure with the middle fulcrum as the pivot, one end is driven and the other end performs the contact action.

[0059] The drive system 200 outputs power to the drive unit 322, causing the second contact unit 320 to rotate around the rotation center 323, thereby driving the second contact part 3211 to close towards or move away from the first contact part 3111. Since the rotation center 323 is located between the drive unit 322 and the second contact part 3211, that is, the driving force of the drive system 200 acts on one side of the lever, and after being transmitted through the fulcrum, it generates a large displacement and contact pressure on the other side, which is beneficial to improving driving efficiency and ensuring the reliability of the contact system 300 closing.

[0060] The rotation center 323 is located between the drive unit 322 and the second contact unit 3211, so that the drive unit 322 is arranged in the area where the second contact unit 320 is located away from the area where the first contact unit 310 is located, thereby avoiding spatial interference problems caused by the components being too close to the stationary contact during the closing process; at the same time, the drive unit 322 being away from the high-voltage arc area also helps to improve electrical safety and ensure the long-term stable operation of the drive system 200.

[0061] In detail, the first terminal 410 is connected to the first contact unit 310, and the second terminal 420 is connected to the second contact unit 320; in the open state, along the first direction X, the rotation center 323 on the second contact unit 320 is located between the drive unit 322 and the second terminal 420.

[0062] When the load switch 10 is in the open state, the second contact unit 320 has rotated around the rotation center 323 to a position away from the first contact part 3111. Since the rotation center 323 is located between the drive part 322 and the second terminal 420, it means that the drive part 322 is arranged on one side of the rotation center 323, while the second terminal 420 is located on the other side. This provides sufficient operating space for the drive system 200 to transmit power to the second contact unit 320, avoiding obstruction of movement or assembly difficulties due to structural congestion.

[0063] It can be understood that by setting the rotation center 323 between the drive unit 322 and the second terminal 420, this embodiment optimizes the component distribution around the second contact unit 320, so that the drive unit 322 can be close enough to the output component of the drive system 200, thereby improving the force transmission efficiency; at the same time, the second terminal 420 and the drive unit 322 are placed on both sides of the rotation center 323, which also facilitates the installation of the drive system 200 and the drive unit 322.

[0064] Furthermore, the line connecting the drive unit 322, the rotation center 323, and the second contact unit 3211 in sequence forms an obtuse angle.

[0065] Specifically, the driving part 322 is the connection point where the driving system 200 applies force, located at one end of the second contact unit 320. The rotation center 323 is the fulcrum around which the second contact unit 320 rotates. The second contact part 3211 is the functional end that realizes electrical contact, located on the side away from the driving part 322. When these three parts are connected sequentially in the planes containing the first direction X and the second direction Y by imaginary line segments, the included angle formed by these line segments, with the rotation center 323 as the vertex, forms an obtuse angle greater than 90°.

[0066] It is understood that this obtuse angle structure helps optimize the space occupied by the contact unit in the first direction X. Since the drive part 322 and the second contact part 3211 are located on both sides of the rotation center 323 and form a large included angle, their projected distance in the second direction Y is relatively reduced, thereby allowing other components to be arranged more compactly in this direction.

[0067] It is also worth mentioning that the distance between the drive unit 322 and the rotation center 323 is less than the distance between the rotation center 323 and the second contact unit 3211.

[0068] By positioning the drive unit 322 close to the rotation center 323, the lever arm distribution of the second contact unit 320 is optimized. While ensuring sufficient opening distance and contact pressure, the space occupied on the drive side is effectively controlled. This satisfies both the requirements of mechanical transmission efficiency and the opening distance requirements of the load switch 10, enabling miniaturization and high-density integration.

[0069] Furthermore, the drive system 200 includes a drive mechanism 210 and a transmission member 220. The transmission member 220 has a first end 221 and a second end 222. The first end 221 is connected to the drive mechanism 210, and the second end 222 is connected to the second contact unit 320 to form a drive section 322. The drive mechanism 210 drives the second contact unit 320 to move through the transmission member 220.

[0070] The driving force generated by the drive mechanism 210 is transmitted and converted through the transmission component 220, and finally acts on the second contact unit 320, thereby driving it to rotate and realize the closing and opening operations of the second contact part 3211 around the rotation center 323, moving it closer to or further away from the first contact part 3111. In some embodiments of the present invention, the drive part 322 is a through hole or a shaft, and the second end 222 is rotatably connected to the shaft hole of the drive part to avoid jamming during power transmission.

[0071] Furthermore, in some embodiments of the present invention, such as Figure 1 , 2 7. The transmission component 220 is made entirely of metal, and its space-saving design is relatively small; in other embodiments of the present invention, such as Figure 10 , 15 The transmission component 220 is made of plastic, and the first end 221 is provided with a mounting groove. The drive mechanism 210 is provided with a protrusion that cooperates with the mounting groove on the first end 221, or the first end 221 is provided with a protrusion, and the drive mechanism 210 is provided with a mounting groove that cooperates with the protrusion. The second end 222 is connected to a shaft to facilitate the rotational connection of the second contact unit 320 to form a drive part 322, thus preventing the transmission component 220 from falling off. Furthermore, the shaft is made of metal to reduce the friction between the second contact unit 320 and the transmission component 220.

[0072] In detail, the drive mechanism 210 includes a coil assembly 211, a yoke 212 and an armature assembly 213. The first end 221 is connected to the armature assembly 213. The armature assembly 213 and the coil assembly 211 are arranged along the first direction X, that is, they are arranged side by side in the first direction X, rather than stacked one on top of the other, which helps to reduce the overall height and size and adapt to the design of the compact housing 110.

[0073] As can be seen, by arranging the coil assembly 211 and the armature assembly 213 laterally along the first direction X and along the second direction Y, with the rotation center 323 located between the armature assembly 213 and the second contact part 3211, a three-dimensional layout of lateral integration and longitudinal staggering is constructed. This not only facilitates the stable operation of the magnetic circuit system, but also provides sufficient free space for the movement of the contact system 300, thereby improving the space utilization and operational reliability of the overall structure.

[0074] Furthermore, along the first direction X, the second contact portion 3211 is located between the first contact unit 310 and the coil assembly 211, so that the second contact unit 320 has a large range of motion; along the second direction Y, the second contact portion 3211 is located between the coil assembly 211 and the first terminal 410 and the second terminal 420, that is, the first terminal 410, the second contact portion 3211 and the second terminal 420 are arranged laterally along the first direction X.

[0075] The second contact unit 320 includes a second contact 321, and a second contact portion 3211 is disposed at one end of the second contact 321. In a plane perpendicular to the first direction X, at least a portion of the projection of the second contact 321 coincides with the projection of the coil assembly 211, and the ratio of the length of the portion of the second contact 321 that coincides with the projection of the coil assembly 211 to the length of the second contact 321 is less than one-half.

[0076] When viewed from a perspective perpendicular to the first direction X, a portion of the moving contact overlaps spatially with the area occupied by the coil assembly 211, meaning the two have a projected intersection in this view. This partial spatial overlap design allows the moving contact to achieve its movement stroke without completely deviating from the arrangement area of ​​the coil assembly 211, thereby effectively utilizing the space around the electromagnetic mechanism that might otherwise be idle.

[0077] Furthermore, the ratio of the length corresponding to the projected portion of the moving contact to its total length is less than one-half, meaning that less than half of the length of the moving contact coincides with the coil assembly 211 in the projection, to ensure that the moving contact has sufficient freedom of movement and electrical clearance.

[0078] It is worth noting that the projection lengths mentioned above all refer to the lengths extended in the second projection direction Y.

[0079] Of course, in other embodiments of the present invention, the projection of the second contact 321 does not coincide with the projection of the coil assembly 211 in a plane perpendicular to the first direction X. This can be adjusted according to actual installation requirements, and no specific limitation is made here.

[0080] It is evident that by controlling the projection relationship between the second contact 321 and the coil assembly 211 in the direction perpendicular to the lateral direction, effective utilization of three-dimensional space is achieved. When there is partial overlap in their projections, the structural compactness can be improved while ensuring sufficient insulation distance; and when the projections do not overlap at all, the electrical isolation performance between the electromagnetic components and the conductive components can be further enhanced, making it suitable for application scenarios with higher safety requirements. This not only ensures the degree of freedom of action and electrical safety margin between various functional modules, but also improves the rationality and adaptability of the overall layout of the load switch 10.

[0081] Furthermore, the axis of the coil assembly 211 is set along the second direction Y; the armature assembly 213 is provided with an armature shaft 214, the axis of the armature shaft 214 extends along the third direction Z. It can be understood that the third direction is a spatial orthogonal direction perpendicular to the first direction X and the second direction Y, and is also the width direction of the housing 110.

[0082] The load switch 10 also includes a fixing plate 120 connected to the housing 110. One end of the armature shaft 214 is connected to the housing 110, and the other end is connected to the fixing plate 120. The fixing plate 120 covers at least part of the transmission component 220.

[0083] It is understood that the fixed plate 120 does not participate in the conduction or transmission function, but rather serves as an auxiliary structural component for support and enclosure. One end of the armature shaft 214 is connected to the housing 110, and the other end is connected to the fixed plate 120, thereby reliably fixing both ends of the armature shaft 214 between the housing 110 and the fixed plate 120, forming a complete mechanical support system. Since the fixed plate 120 covers at least part of the transmission component 220, it can prevent the transmission component 220 from falling off, improving operational safety and reliability.

[0084] In addition, the housing 110 is provided with mounting portions 111 for assembly with the fixing plate 120. At least two mounting portions 111 are provided, with the armature shaft 214 positioned between the two mounting portions 111 along the first direction X and the second direction Y, to prevent unbalanced forces on both sides of the fixing plate 120. Preferably, to further ensure assembly, three mounting portions 111 are provided, allowing the fixing plate 120 to cover at least part of the transmission component 220. The fixing plate 120 is provided with at least two adhesive outlets 121 for further stable connection. The two adhesive outlets 121 are located on both sides of the armature shaft 214 along the first direction X and the second direction Y. Adhesive is applied at the two adhesive outlets to further bond the fixing plate 120 to the housing 110 and to one of the yokes 212.

[0085] Furthermore, the second contact unit 320 includes a second contact 321 and a contact support 324. A second contact portion 3211 is disposed on the second contact 321. One end of the contact support 324 is provided with a driving portion 322, and the other end is rotatably connected to the second contact 321.

[0086] The contact support 324 serves as a support and transmission component, and is provided with a drive part 322. The drive part 322 is used to connect with the transmission component 220 of the drive system 200 to receive external power input. The other end of the contact support 324 is rotatably connected to the second contact 321, so that the two can rotate relative to each other. This connection is usually achieved through a rotating shaft or hinge structure.

[0087] When the drive system 200 applies a force to the contact support 324 through the drive unit 322, the contact support 324 rotates around the rotation center 323, thereby driving the second contact 321 to move, so that the second contact portion 3211 on it faces or moves away from the first contact portion 3111.

[0088] It should be noted that the rotation center 323 is a rotating shaft, and the contact support 324 is rotatably connected to the second contact 321 via the rotating shaft. When the drive system 200 applies a force to the contact support 324 through the drive unit 322, the contact support 324 and the second contact 321 move around the rotating shaft. Under the drive of the drive system 200, the angle by which the contact support 324 can rotate around the rotating shaft is greater than the angle by which the second contact 321 can rotate around the rotating shaft when it is open, thereby increasing the contact pressure of the first contact 311 and the second contact 321. Specifically, in this embodiment, the axial direction of the rotating shaft extends along the third direction Z.

[0089] To facilitate the positioning and installation of the rotating shaft, a rotating shaft positioning plate 130 can be further provided. The rotating shaft positioning plate 130 is similar in principle to the fixing plate 120, that is, one end of the rotating shaft is connected to the housing 110, and the other end is connected to the rotating shaft positioning plate 130, so that both ends of the rotating shaft can be reliably fixed between the housing 110 and the rotating shaft positioning plate 130. The housing 110 is also provided with a mounting part 111 for mounting with the rotating shaft positioning plate 130.

[0090] Furthermore, the second contact unit 320 also includes an elastic member 325. One end of the elastic member 325 is fixedly connected to the contact support 324, and the other end extends to form an abutment portion 3251. The abutment portion 3251 is used to abut against the second contact 321 to provide contact pressure. The abutment portion 3251 is located on the side of the second contact 321 away from the first contact unit 310.

[0091] Therefore, in the assembled state, the abutment portion 3251 is located on the side of the second contact 321 away from the first contact unit 310, that is, at the end of the second contact away from the first contact.

[0092] When the contact system 300 enters the closed state, since the contact support 324 can move relative to the second contact 321, after the second contact 321 contacts the first contact 311, the contact support 324 will continue to move relative to the second contact 321 and compress the elastic member 325, causing it to undergo elastic deformation. This allows the elastic force generated by the elastic member 325 to continuously apply pushing force to the second contact 321, thereby establishing a stable and reliable contact pressure between the second contact portion 3211 and the first contact portion 3111.

[0093] The “elastic element 325” mentioned here specifically includes a force-applying element composed of a metal spring sheet or an integrated component with elastic deformation capability, which is fixed on the contact bracket 324 to facilitate the assembly of the transmission component 220, the elastic element 325 and the first contact 311.

[0094] Specifically, the elastic element 325 extends out of the contact support 324 to facilitate assembly with the second contact 321, and the portion of the elastic element 325 located outside the contact support 324 includes at least one U-shaped bend to ensure that the elastic element 325 has a large deformation space; the abutment portion 3251 is located between the rotation center 323 and the second contact portion 3211, so that the position of the elastic element 325 avoids the main contact area where the second contact portion 3211 is located—which is the area where arcs are generated and the temperature is highest when interrupting large currents, thereby ensuring that the material properties of the elastic element 325 will not degrade due to long-term heat exposure and ensuring that the elastic properties can remain stable for a long time.

[0095] Furthermore, such as Figure 9 and Figure 11 As shown, the second contact unit 320 also includes a limiting member 326 fixed on the second contact 321. The limiting member 326 is used to abut against the contact support 324 to limit the rotation position of the second contact 321, thereby ensuring that a stable "opening distance" is maintained between the second contact portion 3211 and the first contact portion 3111.

[0096] Specifically, in some embodiments of the present invention, such as Figure 9 , 12 As shown, the limiting member 326 is integrally formed on the second contact 321. The limiting member 326 is located on the side of the second contact 321 closest to the first contact unit 310. Therefore, when the second contact 321 rotates relative to the contact support 324 during movement, the integral limiting member 326 will gradually approach the corresponding structural surface on the contact support 324 until it abuts, thereby preventing it from continuing to move and achieving precise limitation of the rotation position. Furthermore, the limiting member 326 can also be used to weld the flexible connection 327.

[0097] Specifically, in other embodiments of the present invention, such as Figure 7 , 10 As shown in Figure 11, the limiting member 326 is installed on the second contact 321. The limiting member 326 includes a body 3261 for mounting the second contact 321 and a limiting part 3262 for abutting and cooperating with the contact bracket 324. The limiting part 3262 is located on the side of the second contact 321 near the first contact unit 310, which not only ensures that the second contact 321 has a stable and consistent opening distance when opening, but also significantly improves the overall spatial integration of the contact assembly. Furthermore, the rotation center 323 is set on the body 3261, which simplifies the structure of the second contact 321 and reduces the space occupied by the second contact 321 in the first direction X. Furthermore, when there are multiple second contacts 321, the gap between adjacent second contacts 321 can be ensured by fixing the body 3261 to multiple second contacts 321, without the need to set additional pads 3241 between adjacent second contacts 321, thus avoiding friction between adjacent second contacts 321 during movement.

[0098] Of course, in other embodiments of the present invention, the limiting member 326 may also be disposed on the contact support 324, and the limiting member 326 is used to abut against the second contact 321 to limit the rotation position of the second contact 321.

[0099] Optionally, the contact support 324 and the elastic element 325 are integrally formed. The contact support 324 is made of metal, meaning that the two are integrally processed from the same piece of metal through processes such as stamping, etching, or bending. This structure allows the elastic element 325 to be naturally formed as an extension of the contact support 324, without requiring additional installation space and avoiding the risk of loosening or failure caused by assembling multiple parts.

[0100] The contact support 324 and elastic element 325, made of metal, have high structural strength and occupy little space.

[0101] Of course, in other embodiments of the present invention, such as Figure 12 As shown, the contact bracket 324 is made of plastic, and the elastic element 325 is fixedly connected to the contact bracket 324. The contact bracket 324 is provided with a through hole 3243 for forming the driving part 322, and the number of through holes is one.

[0102] The contact support 324 is made of plastic, which has advantages over metal materials, such as good insulation performance and easy molding of complex structures.

[0103] The number of through holes is one, meaning that the entire contact support 324 receives external driving force input through a single connection point, which simplifies the force transmission path, reduces the processing accuracy requirements of the contact support 324, avoids structural deformation or movement jamming caused by uneven force at multiple points, and also helps to reduce assembly complexity and manufacturing costs.

[0104] Furthermore, one end of the contact support 324 is integrally formed with a pad 3241 to separate the multiple second contacts 321 from each other and prevent friction; the other end is integrally formed with a through hole 3243 to form a drive part 322. Furthermore, the elastic member 325 is mounted on the contact support 324 via a connecting shaft 3242.

[0105] Furthermore, the load switch 10 also includes a flexible connection 327 and a second lead-out 328 connected to the second terminal 420. The second lead-out 328 is located on the side of the second contact unit 320 away from the first contact unit 310. One end of the flexible connection 327 is connected to the second contact unit 320, and the other end is connected to the second lead-out 328, thereby bridging the fixed circuit and the moving parts. The flexible connection 327 is typically composed of multiple strands of flexible conductors, possessing good conductivity and deformation adaptability. It can absorb displacement stress during the rotation of the second contact unit 320 around the rotation center 323, preventing the rigid wire from breaking or contact failure due to repeated oscillations.

[0106] The first contact unit 310 also includes a first lead-out 3112 for connection with the first terminal 410. In the closed state, the current flowing through the second contact unit 320 is at least partially opposite to the current flowing through the second lead-out 328, and the repulsive force generated between them can increase the contact pressure between the first contact unit 310 and the second contact unit.

[0107] It is understood that the first contact unit 310 also includes a first contact 311, and a first contact portion 3111 is disposed on the first contact 311.

[0108] The load switch 10 also includes an arc-extinguishing structure 500, which is located between the first lead-out member 3112 and the second lead-out member 328. The arc-extinguishing structure 500 accelerates the deionization process through the grid of the arc-extinguishing structure 500 by means of segmentation, cooling and elongation, etc., and effectively prevents arc reignition or short circuit faults.

[0109] In detail, the arc extinguishing structure 500 includes a stationary arc-inducing grid plate 510, a moving arc-inducing grid plate 520 and a plurality of arc-extinguishing grid plates 530. One end of the stationary arc-inducing grid plate 510 is bent and extended toward the first contact unit 310, and the moving arc-inducing grid plate 520 is electrically connected to the second lead-out member 328.

[0110] Several arc-extinguishing grid plates 530 are arranged in parallel at intervals to form a grid plate group, which is used to divide the elongated electric arc into multiple short segments to accelerate the cooling and deionization process; the stationary arc-inducing grid plate 510 serves as a guiding element at one end, with one end bent and extending towards the first contact 311 to form a guiding structure pointing towards the stationary contact area. This bending design helps to introduce the arc into the main arc-extinguishing zone at the initial stage of arc generation, preventing the arc from spreading disorderly or adhering to the inside of the housing 110 and causing insulation damage.

[0111] Since the moving arc-initiating grid plate 520 is connected to the second lead-out member 328, its overall potential is consistent with that of the second contact 321. Therefore, when the second contact 321 separates from the first contact 311 and generates an arc, the moving arc root of the arc is transferred from the second contact 321 to the moving arc-initiating plate. This helps to accelerate the transfer of the arc root and quickly enter the arc-extinguishing grid plate 530, thereby extinguishing the arc. At the same time, it can significantly reduce the erosion of the second contact 321 by the arc and improve the product life.

[0112] Furthermore, the portion of the second contact 3211 that contacts the first contact 3111 is located at one end of the second contact 3211 away from the rotation center 323 along the second direction Y. This structural design ensures that the second contact 3211 and the first contact 3111 are in partial contact when the circuit is closed, thus reducing contact resistance while ensuring current carrying capacity and preventing the burning of other uncontacted portions. Furthermore, positioning the contact portion at one end of the second contact 3211 away from the contact shaft 240 along the second direction Y allows for better arc entry into the arc-extinguishing chamber during opening, and also facilitates a more rational arrangement of the arc-extinguishing mechanism space.

[0113] In some embodiments of the present invention, such as Figure 4 , 5 8, 9, 14 The second lead-out member 328 is provided with a clearance part 3283. In the open state, at least a part of the second contact unit 320 is located in the clearance part 3283; one end of the moving arc grid plate 520 passes through the clearance part 3283 and is connected to the second lead-out member 328.

[0114] The clearance portion 3283 is a partially recessed or open area, forming a spatial structure with a certain depth and contour. In the open position, at least a portion of the second contact 321 is located within the clearance portion 3283, indicating that the two are spatially overlapping. This design makes full use of the space above the second lead-out member 328, allowing the second contact unit 320 to be "embedded" in it when rotated to the open position, thereby achieving a larger opening distance without increasing the overall lateral dimension and increasing the repulsive force between the second contact unit 320 and the second lead-out member 328.

[0115] Specifically, please refer to Figure 8 and Figure 9The second lead-out member 328 has two lead-out portions 3281, and a clearance portion 3283 is disposed between the two lead-out portions 3281. The clearance portion 3283 is U-shaped, that is, it has an inwardly concave U-shaped shape in its overall outline. Its two sides are formed by the roots or main body of the two lead-out portions 3281, and a cavity with an opening facing the movement direction of the second contact 321 is formed in the middle. This U-shaped structure allows the clearance portion 3283 to provide sufficient space in the lateral and longitudinal directions, allowing at least a part of the second contact 321 to extend into the U-shaped area when it swings around the rotation center 323 during the opening process, thereby avoiding mechanical interference with the second lead-out member 328.

[0116] Specifically, the second lead-out member 328 also includes a connecting part 3282 that is angularly connected to the lead-out part 3281. One end of the connecting part 3282 is connected to the lead-out part 3281, and the other end is connected to the first terminal 410 or the second terminal 420. One end of the moving arc-guiding grid plate 520 passes through the avoidance part 3283 and is connected to the connecting part 3282.

[0117] Since the connecting part 3282 is located on the outer extension of the lead-out part 3281 and is entirely within the current path of the second lead-out part 328, this connection method facilitates the moving arc-initiating grid 520 to always maintain the same potential state with the second contact 321, thereby quickly participating in the arc-guiding process when an arc occurs.

[0118] Based on this, one end of the moving arc-inducing grid 520 passes through the clearance portion 3283 and is electrically connected to the second lead-out member 328. Since the clearance portion 3283 itself is an open or perforated structure, it naturally forms a channel through which the moving arc-inducing grid 520 can pass, allowing the moving arc-inducing grid 520 to extend from below or the side and be fixedly connected to the second lead-out member 328 without affecting the movement of the second contact unit 320. This not only simplifies the assembly process but also ensures reliable electrical contact between the moving arc-inducing grid 520 and the second lead-out member 328, keeping it at the same potential as the second contact unit 320 throughout the entire operation.

[0119] It should be noted that there may be one or more second contacts 321. When there are multiple second contacts 321, there are also multiple soft connections 327. The multiple soft connections 327 are connected to the multiple second contacts 321 in a one-to-one correspondence.

[0120] It is worth mentioning that one end of the flexible connection 327 is connected to the lead-out portion 3281, and the other end is connected to the second contact 321. The lead-out portion 3281 is located on the side of the second contact 321 away from the first contact 311. The two leads-out portions 3281 also facilitate the one-to-one connection of the flexible connection 327 with multiple second contacts 321.

[0121] Furthermore, in this embodiment, a rotation center 323 is provided at one end of the second contact 321. The rotation center 323 is located between the two ends of the flexible connection 327, which provides greater adaptability and redundancy for the deformation of the flexible connection 327 during the movement of the second contact 321. This allows the flexible connection 327 to bend or stretch in a coordinated manner on both the side near the lead-out portion 3281 and the side near the connection point of the second contact 321 during the swinging process, avoiding excessive tension or folding caused by a single offset of the connection point.

[0122] Furthermore, the welding positions of the flexible connection 327 and the second lead-out member 328 are located on the side of the lead-out member 3281 away from the first contact 311. That is, one end of the flexible connection 327 is fixed to the lead-out member 3281 by welding, and the welding point is located on the outer end or surface area of ​​the lead-out member 3281. This allows the flexible connection 327 to be connected from the rear or rear-side of the second contact 321, avoiding the provision of connection structures or protruding parts in the frontal mating area between the first contact 311 and the second contact 321. This provides more space for the contact area, which is beneficial for achieving a stable contact pressure distribution and reducing the risk of poor contact caused by local structural interference.

[0123] It is understood that one end of the second contact 321 is provided with a rotation center 323, and the other end is provided with a second contact portion 3211. Under the drive of the drive mechanism 210, the end of the second contact 321 with the second contact portion 3211 can move around the rotation center 323. The second contact portion 3211 and the rotation center 323 are arranged along the second direction Y, and the first contact 311 and the second contact 321 are arranged along the first direction X. The projection of the second contact 321 on the plane perpendicular to the third direction Z and the projection of the second lead 328 on the plane perpendicular to the third direction Z are at least partially coincident. That is, the second contact 321 and the second lead 328 have a spatial overlap area. When the second contact 321 swings around the rotation center 323 in the plane formed by the first direction X and the second direction Y, its movement trajectory is mainly within the range of this plane. Since part of the structure of the second lead 328 coincides with its projection on the third direction, the second lead 328 can be set as close as possible to the second contact 321, thereby saving lateral installation space.

[0124] Among them, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0125] It is worth mentioning, such as Figure 4 , 5 8, 9, 14, the projected area of ​​a single second contact 321 on a plane perpendicular to the third direction Z is greater than the projected area of ​​a single second contact 321 on a plane perpendicular to the first direction X.

[0126] Therefore, when viewed from the first direction X, the second contact 321 exhibits a smaller cross-sectional profile, while when viewed from the third direction, it exhibits a larger profile size. In other words, the second contact 321 is generally of a sheet-like or plate-like structure, and its length direction extends approximately along the second direction Y.

[0127] As can be seen, the second contact 321 occupies a small physical space in the third direction Z, meaning its spatial extension in that direction is limited. Therefore, additional space can be reserved around it, especially above or below it, for arranging other components. For example, the second lead-out 328 can have a clearance portion 3283 provided at a position that partially covers or is adjacent to the second contact 321 in the third direction Z. Even if the projections of the two overlap in the third direction Z, interference can be avoided because the second contact 321 itself is compact in this direction.

[0128] The number of second contacts 321 is at least two, and the at least two second contacts 321 are spaced apart along the third direction Z. That is, when the drive system 200 drives the second contact unit 320 to move to close or open the circuit, at least two second contacts 321 contact or separate from the first contact 311 to achieve closing or opening. In this way, the purpose of current diversion is achieved through at least two second contacts 321, thereby enhancing the load switch's ability to withstand short-circuit current and also helping to reduce the size of the contact resistance.

[0129] Furthermore, in other embodiments of the present invention, please refer to... Figure 10 , Figure 13 The second contact 321 includes a first segment 3212, a second segment 3213, and a third segment 3214 connected at an angle in sequence. The first segment 3212 is used for welding the flexible connector 327, and the third segment 3214 is provided with a second contact portion 3211. The first segment 3212, the second segment 3213, and the third segment 3214 are roughly in a Z-shape. This contact structure design makes the spatial layout more reasonable, provides more redundant space for the flexible connector 327, and does not affect the contact opening distance.

[0130] Furthermore, the rotation center 323 is located at the angle formed by the first segment 3212 and the second segment 3213.

[0131] Furthermore, the load switch 10 also includes a suction aid 600, which is used to deform and store energy when the first contact unit 310 and the second contact 321 are in a separated state, so as to provide an auxiliary force for the second contact unit 320 to move toward the first contact unit 310; the suction aid 600 includes a fixed end and a deformable end, and along the second direction Y, the fixed end is located between the deformable end and the rotation center 323.

[0132] Specifically, the suction aid 600 is an elastic structural component, which can be made of metal springs or elastic materials, and includes two key parts: a fixed end and a deformable end. The fixed end is connected to a stationary part of the load switch 10 (such as the housing 110), and its position is relatively fixed; the deformable end cooperates with the second contact unit 320 or its linked moving part, and undergoes elastic deformation during the opening process. When the first contact unit 310 and the second contact 321 are in the separated state, i.e., in the open state, the suction aid 600 generates internal stress due to the force displacement of the deformable end, thereby storing mechanical energy in the form of elastic potential energy.

[0133] When the drive system 200 starts and begins to perform the closing action, the elastic potential energy stored in the pull-in member 600 is released, and its deformed end springs back to its original shape, applying a pushing force to the second contact unit 320 toward the first contact unit 310. This force does not replace the main driving force, but rather serves as an auxiliary excitation superimposed on the output of the drive system 200. This helps to reduce the initial pull-in force required by the electromagnetic drive mechanism 210, improves the operating sensitivity, and ensures reliable closing, especially in cases where voltage fluctuations or magnetic circuit aging cause a decrease in driving force.

[0134] It is worth mentioning that in this embodiment, the suction aid 600 is used to engage with the armature assembly 213.

[0135] Furthermore, one end of the second lead-out 328 is connected to the second contact 321, and the other end is used to connect to the first terminal 410 or the second terminal 420; when the first contact 311 and the second contact 321 are closed, at least a portion of the current passing through the second contact 321 is in the opposite direction to at least a portion of the current passing through the second lead-out 328.

[0136] By setting a reverse current between the second contact 321 and the second lead-out 328, the electro-repulsive force generated between the current-carrying conductors can be effectively utilized to establish a stable contact pressure during the contact closure process, thereby improving the breaking performance and operational reliability of the switch.

[0137] Furthermore, the housing 110 is provided with a clearance area 114 for mounting other electrical components. The clearance area 114 is located on one side of the coil assembly 211 along the second direction Y and on the side of the second contact 321 along the first direction X and away from the first contact 311.

[0138] It is also worth noting that existing load switches 10 generally have the problem of unreasonable internal structure layout, resulting in an abnormally complex internal structure. This not only increases the number of parts and the difficulty of assembly, but also forces the mounting housing 110 to increase in size significantly. This not only occupies too much space, but also severely squeezes the installation area of ​​other electrical components, affecting the compactness of the overall layout and the convenience of wiring.

[0139] Please see Figure 15 The housing 110 of this embodiment has a first mounting area 112 and a second mounting area 113. The volume of the first mounting area 112 is larger than the volume of the second mounting area 113. The terminal assembly 400 is disposed on the side of the second mounting area 113 away from the first mounting area 112.

[0140] One end of the terminal assembly 400 is disposed in the second mounting area 113, and the other end extends out of the housing 110. The wiring terminals include a first wiring terminal 410 and a second wiring terminal 420, which are conductive interface components used to connect external wires and realize power input or load output. Therefore, by arranging such wiring terminals in the relatively small second mounting area 113, the space requirements for external wiring operations and electrical safety requirements are met, while avoiding the occupation of space resources in the main functional cavity. This not only improves the utilization efficiency of the internal space of the housing 110, but also provides an installation environment that matches the characteristics of different types of components.

[0141] Specifically, on the projection plane perpendicular to the third direction Z, the projected area of ​​the first installation area 112 is larger than the projected area of ​​the second installation area 113.

[0142] Furthermore, the first terminal 410 and the second terminal 420 are disposed on the same side of the housing 110 in the second mounting area 113.

[0143] Specifically, the housing 110 is formed by multiple side plates that together enclose a first mounting area 112 and a second mounting area 113, and the first terminal 410 and the second terminal 420 are both disposed on the same side plate. For example, as shown in the figure, the first terminal 410 and the second terminal 420 are both disposed on the bottom side plate of the housing 110; of course, in other embodiments, the first terminal 410 and the second terminal 420 may also be disposed on other side plates of the housing 110 corresponding to the second mounting area 113, which is not specifically limited here.

[0144] Furthermore, the drive mechanism 210 is located in the first mounting area 112, and the contact system 300 is located in the second mounting area 113.

[0145] The drive system 200, due to its relatively complex structure and high requirements for installation accuracy and freedom of motion, is placed in the first installation area 112, which has more space, which is conducive to its stable electromagnetic response and mechanical output. The contact system 300, as a functional terminal that needs to be connected to external circuits, is arranged in the second installation area 113, which is equipped with wiring terminals, so as to facilitate electrical connection with the first wiring terminal 410 and the second wiring terminal 420, shorten the conductive path, and reduce the contact resistance.

[0146] Furthermore, the arc-extinguishing structure 500 is disposed in the second installation area 113 so that the arc-extinguishing structure 500 is adjacent to or near the contact system 300, thereby shortening the conduction path of the arc from the contact to the arc-extinguishing structure 500, improving the arc-extinguishing response speed, and enhancing the structural compactness.

[0147] In addition, the arc extinguishing structure 500 is located between the first terminal 410 and the second terminal 420, which not only improves the utilization of internal space, but also shortens the transmission distance of the arc from the contact to the arc extinguishing system, which is conducive to improving breaking capacity and safety.

[0148] Furthermore, the outer wall of the shell 110 forms an avoidance area 114.

[0149] Specifically, in this embodiment, the avoidance area 114 is formed by the outer side wall of the housing 110, and the outline of the avoidance area 114 on the projection plane perpendicular to the third direction can be rectangular, circular, or irregular.

[0150] The outline shape of the avoidance area 114 on the projection surface can be flexibly set according to actual needs: if it is necessary to accommodate square components or achieve regular assembly positioning, a rectangular outline can be used; if it is to adapt to circular sensors, terminals or other ring-shaped components, it can be designed as a circle; and when it is necessary to match electrical components with complex shapes or adapt to asymmetrical wiring paths, it can also be constructed as an irregular shape.

[0151] It is understood that the function of the clearance area 114 is not limited to mechanical clearance, but can also be used to install electrical components. For example, provided that the insulation distance and protection level requirements are met, small relays, status indicators, temperature sensors or other auxiliary circuit components can be placed in this area.

[0152] Therefore, this embodiment provides a spatial solution that combines structural simplicity and functional extensibility by forming an avoidance area 114 from the outer wall of the housing 110 and allowing its projected contour to have various geometric forms. This design not only ensures the freedom of internal moving parts but also creates conditions for the flexible arrangement of electrical components, reflecting the technical concept of structural design serving multifunctional integration.

[0153] In summary, this embodiment of the invention provides a load switch 10. By designing the second contact unit 320 to rotate around the rotation center 323 and controlling its geometric configuration in the open state, the first contact portion 3111, the rotation center 323, and the second contact portion 3211 form an angle within a specific range. This not only achieves reliable breaking capacity but also optimizes the spatial arrangement of internal components, facilitating the miniaturization and compact design of the overall structure. Furthermore, the setting of this angle range also balances the feasibility of mechanical movement with electrical safety, avoiding insufficient opening distance due to an excessively small angle and preventing structural interference or driving difficulties due to an excessively large angle. It is evident that this layout adjustment provides sufficient installation and movement space for the second contact unit 320, achieving efficient integration of functional components in three-dimensional space for the load switch 10, resulting in a more compact structure and improved overall performance in terms of electrical clearance and structural rationality.

[0154] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A load switch, characterized in that, include: Casing (110); Drive system (200); The contact system (300) includes a first contact unit (310) having a first contact portion (3111) and a second contact unit (320) having a second contact portion (3211). The second contact unit (320) is provided with a driving part (322) that cooperates with the driving system (200). Under the drive of the driving system (200), the second contact part (3211) moves around the rotation center (323) on the second contact unit (320) to move closer to or away from the first contact part (3111) to close or open the circuit. In the open state, the midpoint of the first contact part (3111), the rotation center (323) on the second contact unit (320), and the midpoint of the second contact part (3211) form an angle A, which is 15°~60°.

2. The load switch according to claim 1, characterized in that, The included angle A is 30°~45°.

3. The load switch according to claim 1, characterized in that, The load switch further includes a first terminal (410) and a second terminal (420) arranged at intervals along a first direction (X), the first terminal (410) and the second terminal (420) being used to connect to the contact system (300); The first contact unit (310) and the second contact unit (320) are arranged along the first direction (X); along the second direction (Y), the second contact portion (3211) is located between the rotation center (323) on the second contact unit (320) and the first terminal (410) and the second terminal (420); Wherein, the first direction (X) is perpendicular to the second direction (Y).

4. The load switch according to claim 3, characterized in that, In the closed state, along the second direction (Y), the rotation center (323) on the second contact unit (320) is located between the drive part (322) and the second contact part (3211).

5. The load switch according to claim 4, characterized in that, The first terminal (410) is connected to the first contact unit (310), and the second terminal (420) is connected to the second contact unit (320). In the open state, along the first direction (X), the rotation center (323) on the second contact unit (320) is located between the drive part (322) and the second terminal (420). The line connecting the drive part (322), the rotation center (323) and the second contact part (3211) in sequence forms an obtuse angle.

6. The load switch according to claim 2, characterized in that, The distance between the driving part (322) and the rotation center (323) is less than the distance between the rotation center (323) and the second contact part (3211).

7. The load switch according to any one of claims 1-6, characterized in that, The drive system (200) includes a drive mechanism (210) and a transmission component (220). The transmission component (220) has a first end (221) and a second end (222). The first end (221) is connected to the drive mechanism (210), and the second end (222) is connected to the second contact unit (320) to form a drive section (322). The drive mechanism (210) drives the second contact unit (320) to move through the transmission component (220).

8. The load switch according to claim 7, characterized in that, The drive mechanism (210) includes a coil assembly (211), a yoke (212), and an armature assembly (213). The first end (221) is connected to the armature assembly (213). The armature assembly (213) and the coil assembly (211) are arranged along a first direction (X). Along a second direction (Y), the rotation center (323) is located between the armature assembly (213) and the second contact portion (3211).

9. The load switch according to claim 8, characterized in that, The load switch also includes a first terminal (410) and a second terminal (420), and along the first direction (X), the second contact portion (3211) is located between the first contact unit (310) and the coil assembly (211); Along the second direction (Y), the second contact portion (3211) is located between the coil assembly (211) and the first terminal (410) and the second terminal (420); The second contact unit (320) includes a second contact (321), and a second contact portion (3211) is disposed at one end of the second contact (321). In a plane perpendicular to the first direction (X), at least a portion of the projection of the second contact (321) coincides with the projection of the coil assembly (211), and the ratio of the length of the portion of the second contact (321) that coincides with the projection of the coil assembly (211) to the length of the second contact (321) is less than one-half. Alternatively, in a plane perpendicular to the first direction (X), the projection of the second contact (321) does not coincide with the projection of the coil assembly (211).

10. The load switch according to claim 8, characterized in that, The axis of the coil assembly (211) is arranged along the second direction (Y); the armature assembly (213) is provided with an armature shaft (214), and the axis of the armature shaft (214) extends along a third direction (Z) perpendicular to the second direction (Y); The load switch also includes a fixing plate (120) connected to the housing (110), one end of the armature shaft (214) is connected to the housing (110), and the other end is connected to the fixing plate (120), the fixing plate (120) covering at least part of the transmission component (220).

11. The load switch according to any one of claims 1-6, characterized in that, The second contact unit (320) includes a second contact (321) and a contact support (324). The second contact portion (3211) is disposed on the second contact (321). One end of the contact support (324) is provided with a driving portion (322), and the other end is rotatably connected to the second contact (321).

12. The load switch according to claim 11, characterized in that, The second contact unit (320) further includes an elastic element (325), one end of which is fixedly connected to the contact support (324), and the other end extends to form an abutment portion (3251). The abutment portion (3251) is used to abut against the second contact (321) to provide contact pressure. The abutment portion (3251) is located on the side of the second contact (321) away from the first contact unit (310).

13. The load switch according to claim 11, characterized in that, The rotation center (323) is a rotating shaft, and the contact bracket (324) is rotatably connected to the second contact (321) through the rotating shaft. Under the drive of the driving system (200), the angle by which the contact bracket (324) can rotate around the rotating shaft is greater than the angle by which the second contact (321) can rotate around the rotating shaft when it is open.

14. The load switch according to claim 12, characterized in that, The elastic element (325) extends out of the contact support (324), and the portion of the elastic element (325) outside the contact support (324) includes at least one U-shaped bend, and the abutment portion (3251) is located between the rotation center (323) and the second contact portion (3211).

15. The load switch according to claim 12, characterized in that, The second contact unit (320) further includes a limiting member (326) fixed on the second contact (321), the limiting member (326) being used to abut against the contact support (324) to limit the rotational position of the second contact (321); Alternatively, a limiting member (326) may be provided on the contact support (324), the limiting member (326) being used to abut against the second contact (321) to limit the rotational position of the second contact (321).

16. The load switch according to claim 15, characterized in that, The limiting member (326) is integrally formed on the second contact (321), and the limiting member (326) is located on the side of the second contact (321) close to the first contact unit (310); Alternatively, the limiting member (326) is mounted on the second contact (321). The limiting member (326) includes a body (3261) for mounting with the second contact (321) and a limiting part (3262) for abutting and cooperating with the contact support (324). The limiting part (3262) is located on the side of the second contact (321) near the first contact unit (310). The rotation center (323) is located on the body (3261).

17. The load switch according to claim 12, characterized in that, The contact support (324) and the elastic element (325) are integrally formed, and the contact support (324) is made of metal.

18. The load switch according to claim 12, characterized in that, The contact support (324) is made of plastic. The contact support (324) has a through hole for forming the driving part (322), and the number of the through holes is one.

19. The load switch according to claim 3, characterized in that, The load switch further includes a flexible connector (327) and a second lead-out (328) connected to the second terminal (420). The second lead-out (328) is located on the side of the second contact unit (320) away from the first contact unit (310). One end of the flexible connector (327) is connected to the second contact unit (320), and the other end is connected to the second lead-out (328). The first contact unit (310) further includes a first lead-out (3112) for connecting to the first terminal (410). The load switch further includes an arc-extinguishing structure (500) located between the first lead-out (3112) and the second lead-out (328).

20. The load switch according to claim 19, characterized in that, The arc extinguishing structure (500) includes a stationary arc-inducing grid plate (510), a moving arc-inducing grid plate (520), and a plurality of arc-extinguishing grid plates (530). One end of the stationary arc-inducing grid plate (510) is bent and extended toward the first contact unit (310), and the moving arc-inducing grid plate (520) is electrically connected to the second lead-out member (328).

21. The load switch according to claim 20, characterized in that, The second lead-out member (328) is provided with a clearance portion (3283). In the open state, at least a portion of the second contact unit (320) is located in the clearance portion (3283). One end of the moving arc grid plate (520) passes through the clearance portion (3283) and is connected to the second lead-out member (328).

22. The load switch according to claim 19, characterized in that, The second contact unit (320) includes a second contact (321), the second contact (321) includes a first segment (3212), a second segment (3213) and a third segment (3214) connected at an angle in sequence, the first segment (3212) is used for welding a flexible connection (327), and the third segment (3214) is provided with a second contact portion (3211).

23. The load switch according to claim 8, characterized in that, The load switch further includes a suction aid (600) for deforming and storing energy when the first contact unit (310) and the second contact (321) are in a separated state, so as to provide a force for the second contact unit (320) to move toward the first contact unit (310); the suction aid (600) includes a fixed end and a deformable end along a second direction (Y), the fixed end being located between the deformable end and the rotation center (323).

24. The load switch according to any one of claims 3-6, characterized in that, The second contact unit (320) includes at least two second contacts (321), which are spaced apart along a third direction (Z), and the third direction (Z), the first direction (X), and the second direction (Y) are perpendicular to each other.

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