A fusion switch

Abstract

The utility model provides a kind of fusion switch, it is related to electrical equipment technical field.Fusion switch includes shell and the first handle, second handle, first limit piece and second limit piece being arranged in shell.The first handle has closing state and opening state, to control main circuit conduction or break;Second handle has closing and opening state, to control secondary circuit conduction or break;First limit piece is transmission connection with secondary handle, second limit piece is used to be fixed with first limit piece cooperation;In the case where first handle and second handle are all in opening state, first limit piece is located on the movement path of first handle, to limit first handle movement;In the case where second handle is converted from opening state to closing state, second handle drives first limit piece away from first handle and is fixed with second limit piece cooperation, to allow first handle can move to close, to make larger current first pass through pre-charging secondary circuit, improve the operation safety of fusion switch.

Description

Technical Field

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

[0002] Circuit breakers, as key protective components in low-voltage power distribution systems, are widely used for circuit connection, disconnection, and overload and short-circuit protection.

[0003] However, when there is a high voltage difference between the input and output terminals of existing circuit breakers before closing, and the system contains large-capacity filters or energy storage capacitors, a huge instantaneous inrush current (i.e., surge current) will be generated if the moving and stationary contacts close directly and quickly. This inrush current will not only exacerbate arc erosion between the contacts, leading to contact welding or material transfer and shortening the electrical life of the switch, but may also cause protection malfunctions, equipment damage, or even system safety accidents, seriously affecting the stability and safety of the power supply system. Utility Model Content

[0004] This invention provides a fusion switch that can suppress closing inrush current, improve the switching capacity, and effectively enhance the safety and reliability of the fusion switch.

[0005] The embodiments of this utility model can be implemented as follows: In a first aspect, this utility model provides a fusion switch, including a housing and a first handle, a second handle, a first limiting member, and a second limiting member disposed on the housing; The first handle has a closed state and a closed state to control the main circuit to be turned on or off; the second handle has a closed state and a closed state to control the secondary circuit to be turned on or off, and the secondary circuit is connected in parallel with the main circuit; the first limiting member is drivenly connected to the second handle, and the second limiting member is used to fix and cooperate with the second handle. Wherein, when both the first handle and the second handle are in the open state, the first limiting member is located on the movement path of the first handle to restrict the movement of the first handle; When the second handle changes from the open state to the closed state, the second handle drives the first limiting member away from the first handle and is fixedly engaged with the second limiting member, so as to allow the first handle to move to close the circuit.

[0006] In an optional embodiment, the second limiting member is movably disposed on the housing, and at least a portion of the second limiting member is located in the movement path of the first handle; When the first handle changes from the open state to the closed state, the first handle drives the second limiting member to disengage from the fixed engagement with the second handle, so that the second handle and the first limiting member can be reset to the open state. When the first handle changes from the closed state to the open state, the first handle disengages from the second limiting member so that the second limiting member is reset.

[0007] In an optional embodiment, the fusion switch further includes a first reset member, which is disposed in the housing and connected to the second handle. The first reset member is used to drive the second handle to reset to the open state when the second handle is disengaged from the second limiting member.

[0008] In an optional embodiment, the fusion switch further includes a second reset member disposed in the housing and connected to the second limiting member. The second reset member is used to drive the second limiting member to reset when the first handle is disengaged from the second limiting member.

[0009] In an optional embodiment, the first limiting member is provided with a first connecting part, a second connecting part, and a limiting part, wherein the first connecting part is movably connected to the housing, and the second connecting part is movably connected to the second handle; When the second handle is in the open position, the limiting part is located in the movement path of the first handle.

[0010] In an optional embodiment, the first limiting member further includes a first guide portion connected to the limiting portion. The first guide portion is inclined and, when the first handle changes from the closed state to the open state, the first guide portion is used to slide against the first handle to make the limiting portion move away from the movement path of the first handle; and the extension length of the limiting portion within the movement path of the first handle is less than the movement path length of the second handle when it changes from the open state to the closed state.

[0011] In an optional embodiment, the second handle includes a first body, with a third connecting portion and a fourth connecting portion respectively provided at both ends of the first body. The third connecting portion is connected to the reset member, and the fourth connecting portion is movably connected to the first limiting member. The first body is also provided with a handle portion and a first snap-fit ​​portion on both sides. The handle portion extends out of the housing, and the first snap-fit ​​portion is used to fix and cooperate with the second limiting member.

[0012] In an optional embodiment, the second limiting member includes a second body, and a fifth connecting part and a second abutting part are provided at the end of the second body away from the first handle. The fifth connecting part is connected to the second reset member, and the second abutting part extends to the movement path of the first handle. The second body is also provided with a limiting groove, and a second locking part is provided in the limiting groove. When the second handle changes from the open state to the closed state, the first locking part of the second handle is embedded in the limiting groove and engages with the second locking part; when the first handle changes from the open state to the closed state, the first handle abuts against the second abutting part and drives the body to move, so that the second locking part disengages from the first locking part.

[0013] In an optional embodiment, the second body is provided with a second guide portion, which is inclined. When the second handle changes from the open state to the closed state, the first locking portion of the second handle slides against the second guide portion, so that the first locking portion is embedded in the limiting groove and engages with the second locking portion.

[0014] In an optional embodiment, sliding portions are provided on both sides of the second body to form sliding grooves, and the sliding grooves slide in conjunction with the housing.

[0015] The beneficial effects of the fusion switch provided in this embodiment of the present invention include: when both the first handle and the second handle are in the open state, the first limiting member is located on the movement path of the first handle to restrict the movement of the first handle, thereby preventing the main circuit from being directly closed before pre-charging is completed. This effectively avoids misoperation of the main switch before the pre-charging stage is completed and prevents inrush current caused by a large voltage difference between the two ends of the main circuit, thereby improving the operational safety of the equipment; during the process of the second handle changing from the open state to the closed state, the second handle drives the first limiting member away from the first handle and forms a fixed cooperation with the second limiting member. On the one hand, this allows the secondary circuit to be smoothly connected, completing the pre-charging process of the voltage difference between the two ends of the main circuit; on the other hand, it releases the restriction of the first limiting member on the first handle, allowing the first handle to perform a closing operation, thereby realizing the connection of the main circuit; in summary, the fusion switch provided in this embodiment of the present invention, under the premise of ensuring the preconditions for the main circuit to close, realizes the orderly connection of the main and secondary circuits through the linkage mechanism between the limiting members, effectively reducing the current surge during the closing process and improving the stability and safety of the system. Meanwhile, since the limit components and motion path control are integrated inside the switch housing, no additional space is required, thus meeting the high space utilization requirements of compact electrical equipment without increasing the product size. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model 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.

[0017] Figure 1 A schematic diagram of the fusion switch structure provided in an embodiment of this utility model; Figure 2 This is a schematic diagram of the internal structure of the fusion switch provided in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the fusion switch section provided in an embodiment of the present utility model; Figure 4 A schematic diagram of the second handle structure provided in an embodiment of this utility model; Figure 5 A schematic diagram of the second limiting member provided in an embodiment of this utility model.

[0018] Icons: 10-Fusion switch; 100-Housing; 200-First handle; 300-Second handle; 310-First body; 320-Third connecting part; 330-Fourth connecting part; 340-Handle part; 350-First snap-fit ​​part; 400-First limiting member; 410-First connecting part; 420-Second connecting part; 430-Limiting part; 440-First guide part; 500-Second limiting member; 510-Second body; 520-Fifth connecting part; 530-Second abutting part; 540-Limiting groove; 550-Second snap-fit ​​part; 560-Second guide part; 570-Sliding part; 580-Sliding groove; 600-First reset member; 700-Second reset member. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present 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 present invention without inventive effort are within the scope of protection of the present invention.

[0021] 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.

[0022] In the description of this utility model, 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 utility model product is usually placed during use, they are only for the convenience of describing this utility model 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 utility model.

[0023] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0025] Circuit breakers, as key protective components in low-voltage power distribution systems, are widely used for circuit connection, disconnection, and overload and short-circuit protection.

[0026] However, in practical applications, existing molded case circuit breakers have significant technical defects during the closing operation. When there is a high voltage difference between the input and output terminals before closing, and the system contains a large-capacity filter or energy storage capacitor, if the moving and stationary contacts close directly and quickly, a huge instantaneous inrush current (i.e., surge current) will be generated. This inrush current will not only exacerbate arc erosion between the contacts, leading to contact welding or material transfer and shortening the electrical life of the switch, but may also cause protection malfunctions, equipment damage, or even system safety accidents, seriously affecting the stability and safety of the power supply system.

[0027] Furthermore, traditional molded case disconnect switches generally use a rotary operating mechanism to connect and disconnect the contacts. This requires a large rotation space, resulting in a bulky overall structure that is not suitable for dense installation in space-constrained distribution cabinets. At the same time, the rotary mechanism has many mechanical transmission links, limiting its connecting and disconnecting capabilities and making it difficult to meet the demands of modern power distribution systems for high switching performance, high integration, and miniaturization.

[0028] Therefore, there is an urgent need to provide a molded case switchgear with pre-charging function or soft-close mechanism and optimized operating structure to suppress closing inrush current, improve connection and breaking capacity, reduce installation space, and improve system safety and reliability.

[0029] Based on the problems existing in the current technology, please refer to Figures 1 to 5 This utility model provides a fusion switch 10, which is applicable to electrical equipment such as circuit breakers. It can suppress closing inrush current, improve the connection and breaking capacity, and effectively improve the safety and reliability of the fusion switch 10.

[0030] In detail, the fusion switch 10 includes a housing 100 and a first handle 200, a second handle 300, a first limiting member 400 and a second limiting member 500 disposed on the housing 100.

[0031] Specifically, the first handle 200 has a closed state and a closed state to control the main circuit to be connected or disconnected; the second handle 300 has a closed state and a closed state to control the secondary circuit to be connected or disconnected; the first limiting member 400 is connected to the second handle 300 in a transmission manner, and the second limiting member 500 is used to fix and cooperate with the second handle 300.

[0032] First, it should be noted that the secondary circuit is a pre-charge circuit. This is achieved by setting a pre-charge resistor in series on the secondary circuit and connecting it in parallel with the main circuit. Therefore, the pre-charge circuit is turned on before the main circuit is turned on, allowing a larger current to pass through the pre-charge circuit and preventing the main circuit from being damaged by a large current surge.

[0033] Both the first handle 200 and the second handle 300 have a closed state and a closed state. When both the first handle 200 and the second handle 300 are in the closed state, the first limiting member 400 is located on the movement path of the first handle 200 to restrict the movement of the first handle 200. When the second handle 300 changes from the closed state to the closed state, the second handle 300 drives the first limiting member 400 away from the first handle 200 and fixes it in cooperation with the second limiting member 500 to allow the first handle 200 to move to close the circuit.

[0034] Specifically, when both the first handle 200 and the second handle 300 are in the open state, the first limit member 400 is located on the movement path of the first handle 200 to restrict the movement of the first handle 200, thereby preventing the main circuit from being directly closed before the pre-charge is completed. This can effectively avoid misoperation of the main switch before the pre-charge stage is completed, prevent the inrush current caused by the large voltage difference between the two ends of the main circuit, and thus improve the operational safety of the equipment.

[0035] During the process of the second handle 300 changing from the open state to the closed state, the second handle 300 drives the first limit member 400 away from the first handle 200. On the one hand, this allows the secondary circuit to be smoothly connected, completing the pre-charging process of the voltage difference on both sides of the main circuit. Furthermore, the second handle 300 is fixedly engaged with the second limit member 500 to keep the second handle 300 in the closed state. On the other hand, it releases the restriction of the first limit member 400 on the first handle 200, allowing the first handle 200 to perform the closing operation, thereby realizing the connection of the main circuit.

[0036] As can be seen, the fusion switch 10 provided in this embodiment of the present invention, while ensuring the preconditions for closing the main circuit, achieves orderly conduction of the main and secondary circuits through the linkage mechanism between the limit components, effectively reducing the current surge during the closing process and improving the stability and safety of the system. Meanwhile, since the setting of the limit components and the control of their movement paths are integrated inside the switch housing 100, no additional space is required, thus meeting the high space utilization requirements of compact electrical equipment without increasing the product size.

[0037] Therefore, the fusion switch 10 provided in this embodiment of the present invention is not only applicable to low-voltage electrical equipment such as molded case circuit breakers, but can also be extended to other power systems that require pre-charge control, and has good versatility and practicality.

[0038] Furthermore, the second limiting member 500 is movably disposed in the housing 100, and at least a portion of the second limiting member 500 is located in the movement path of the first handle 200.

[0039] Specifically, when the first handle 200 changes from the open state to the closed state, the first handle 200 drives the second limit member 500 to disengage from the second handle 300 so that the second handle 300 can be reset to the open state; when the first handle 200 changes from the closed state to the open state, the first handle 200 disengages from the second limit member 500 so that the second limit member 500 is reset.

[0040] Specifically, when the first handle 200 moves from the open state to the closed state, it moves along a predetermined path and pushes the second limiting member 500, causing it to displace. This causes the second limiting member 500 to disengage from the fixed engagement state with the second handle 300, thereby releasing the restriction effect of the second limiting member 500 on keeping the second handle 300 in the closed state. This allows the second handle 300 and the first limiting member 400 to return to their initial positions, thus restoring the restriction effect on the movement path of the first handle 200.

[0041] During the transition of the first handle 200 from the closed state to the open state, its movement path gradually moves away from the second limit member 500, thereby releasing the contact or interaction between the two. The second limit member 500 can then be reset to its initial position to ensure that the fusion switch 10 can return to its initial state after completing a full operation cycle, preparing for the next operation. This also helps maintain the stability and consistency of the entire mechanical system during multiple operations.

[0042] As can be seen, the movable design of the second limiting member 500 and its overlapping position and movement path with the first handle 200 enable it to generate corresponding displacement in response to the movement state of the first handle 200. Furthermore, through its fixed engagement and disengagement with the second handle 300, it achieves control and reset of the secondary circuit's operating state. Therefore, it not only simplifies the operation process and reduces the need for manual intervention but also improves the automation and safety of the switch operation. It is particularly suitable for power systems with strict requirements for pre-charge control, effectively preventing electrical faults caused by misoperation or untimely structural reset.

[0043] In order to ensure that the second handle 300 and the second limit member 500 can be successfully reset, the fusion switch 10 also includes a first reset member 600 and a second reset member 700.

[0044] Optionally, both the first reset member 600 and the second reset member 700 are springs. Of course, in other embodiments of this utility model, the first reset member 600 and the second reset member 700 can also be other components, which are not specifically limited here.

[0045] The first reset member 600 is disposed in the housing 100 and connected to the second handle 300. The first reset member 600 is used to drive the second handle 300 to reset to the open state when the second handle 300 is disengaged from the second limit member 500.

[0046] In this embodiment, when the second handle 300 switches from the open to the closed state, the first reset member 600 is further compressed under the action of the second handle 300. Therefore, when the second handle 300 is released from the fixed engagement with the second limit member 500, the second handle 300 can be reset to the initial open position under the elastic force generated by the first reset member 600, thus preparing for the next closing operation. This achieves automated reset of the secondary circuit operation, improving the safety and operational efficiency of the equipment.

[0047] The second reset member 700 is disposed in the housing 100 and connected to the second limiting member 500. The second reset member 700 is used to drive the second limiting member 500 to reset when the first handle 200 is disengaged from the second limiting member 500.

[0048] When the first handle 200 moves from the open state to the closed state, it moves along a predetermined path and pushes the second limiting member 500, causing it to displace. Simultaneously, this causes the second reset member 700 to further compress, thereby disengaging the second limiting member 500 from the fixed engagement state with the second handle 300. After the first handle 200 transitions from the closed state to the open state and releases its influence on the second limiting member 500, the elastic force generated by the second reset member 700 applies a reset force to the second limiting member 500, restoring it to its initial position. Therefore, after completing the main circuit closing operation and entering the opening stage, the second limiting member 500 can automatically return to the ready state of fixed engagement with the first limiting member 400, thus preparing for the next circuit connection and main circuit closing operation. This not only improves the continuity and automation of the operation but also enhances the mechanical stability of the entire fusion switch 10 during multiple operations.

[0049] In detail, the first limiting member 400 is provided with a first connecting part 410, a second connecting part 420 and a limiting part 430. The first connecting part 410 is movably connected to the housing 100, and the second connecting part 420 is movably connected to the second handle 300. When the second handle 300 is in the open state, the limiting part 430 is located in the movement path of the first handle 200.

[0050] In this embodiment, the first limiting member 400 obtains a certain degree of rotation or swing freedom through the movable connection of the first connecting part 410 to the housing 100, and at the same time establishes a linkage relationship between itself and the operating state of the second handle 300 through the movable connection of the second connecting part 420 to the second handle 300. When the second handle 300 is in the open state, the limiting part 430 of the first limiting member 400 is exactly in the movement path of the first handle 200, thereby physically blocking the closing action of the first handle 200 and preventing the main circuit from being accidentally closed before the pre-charging process is completed.

[0051] During the transition of the second handle 300 from the open state to the closed state, the second handle 300 drives the second connecting part 420 to move synchronously, thereby causing the first limiting member 400 to deflect as a whole, so that the limiting part 430 moves out of the movement path of the first handle 200. As a result, the first handle 200 can smoothly enter the closed state after completing the pre-charge operation without being obstructed by the limiting part 430.

[0052] Furthermore, the first limiting member 400 also includes a first guide portion 440 connected to the limiting portion 430. The first guide portion 440 is inclined. When the first handle 200 changes from the closed state to the open state, the first guide portion 440 is used to slide against the first handle 200 so that the limiting portion 430 moves away from the movement path of the first handle 200.

[0053] In this embodiment, the first guide portion 440 extends gradually into the movement path of the first handle 200 in an inclined state. Therefore, when the first handle 200 changes from the closed state to the open state, the first handle 200 abuts against the first guide portion 440 and slides relative to it, thereby squeezing the limiting member out of the movement path of the first handle 200 to ensure that the first handle 200 can move smoothly and reset to the open state.

[0054] It is understood that after the first handle 200 disengages from the first guide portion 440, the first limiting member 400 can be reset under the action of the first reset member 600 to ensure that the limiting portion 430 is once again located within the movement path of the first handle 200, so as to limit the first handle 200.

[0055] It should be noted that the extension length of the limiting part 430 within the movement path of the first handle 200 is less than the movement path length of the second handle 300 when it changes from the open state to the closed state.

[0056] Therefore, as the first handle 200 moves from the closed state to the open state, the first handle 200 abuts against the first guide part 440 and thus drives the second handle 300 to move from the open state to the closed state through the first limiting member 400. Since the extension length of the limiting part 430 is shorter than the travel distance of the second handle 300 during this process, the limiting part 430 has already completed the yielding operation of the first handle 200's movement path before the second handle 300 has fully reached the closed position.

[0057] In detail, the second handle 300 includes a first body 310. A third connecting part 320 and a fourth connecting part 330 are respectively provided at both ends of the first body 310. The third connecting part 320 is connected to the first reset member 600, and the fourth connecting part 330 is movably connected to the first limiting member 400. A handle part 340 and a first locking part 350 are also provided on both sides of the first body 310. The handle part 340 extends out of the housing 100, and the first locking part 350 is used to fix and cooperate with the second limiting member 500.

[0058] It should be noted that the second connecting part 420 is a through hole structure, and the through hole extends along the extension direction of the first limiting member 400. The fourth connecting part 330 extends into the second connecting part 420. Therefore, when the second handle 300 moves from the open state to the closed state, the fourth connecting part 330 and the second connecting part 420 rotate relative to each other and undergo relative displacement, thereby driving the first limiting member 400 to rotate around the first connecting part 410, and finally realizing that the limiting part 430 moves outside the movement path of the first handle 200.

[0059] The second limiting member 500 includes a second body 510. The end of the second body 510 away from the first handle 200 is provided with a fifth connecting part 520 and a second abutting part 530. The fifth connecting part 520 is connected to the second reset member 700. The second abutting part 530 extends to the movement path of the first handle 200. The second body 510 is also provided with a limiting groove 540. A second locking part 550 is provided in the limiting groove 540.

[0060] Therefore, when the second handle 300 changes from the open state to the closed state, the first locking part 350 of the second handle 300 is inserted into the limiting groove 540 and engaged with the second locking part 550 so that the second handle 300 remains in the open state; at this time, the limiting part 430 has moved away from the movement path of the first handle 200, so the first handle 200 can be closed by the operator.

[0061] When the first handle 200 changes from the open state to the closed state, the first handle 200 abuts against the second abutment part 530 and drives the second body 510 to move, so that the second locking part 550 disengages from the first locking part 350. At this time, under the action of the first reset member 600, the first body 310 is reset through the third connecting part 320, and finally reset until the first locking part 350 extends out of the limiting groove 540, and the limiting part 430 is once again located on the movement path of the first handle 200.

[0062] It is worth mentioning that the thickness of the first snap-fit ​​portion 350 is slightly less than the distance between the second snap-fit ​​portion 550 and the groove wall of the limiting groove 540, so as to allow the first snap-fit ​​portion 350 to be smoothly inserted into the limiting groove 540 and engage with the second snap-fit ​​portion 550.

[0063] In addition, the second body 510 is provided with a second guide portion 560 that is connected to the snap-fit ​​portion, and the second guide portion 560 is inclined.

[0064] Specifically, when the second handle 300 changes from the open state to the closed state, the first locking part 350 of the second handle 300 slides against the second guide part 560 to push the second limiting member 500 so that the first locking part 350 can be smoothly inserted into the limiting groove 540. At this time, under the action of the second reset member 700, the second limiting member 500 can keep the second locking part 550 in a locked state with the first locking part 350, thereby keeping the second handle 300 in the closed state.

[0065] During the closing process of the first handle 200, the first handle 200 abuts against the second abutment part 530 and drives the second body 510 to move vertically upward, so that the second locking part 550 is disengaged from the first locking part 350. At this time, the second handle 300 can move along the limit groove 540 to reset under the action of the first reset member 600.

[0066] It is worth mentioning that the second body 510 has sliding parts 570 on both sides to form sliding grooves 580. The sliding grooves 580 slide with the housing 100. The extension direction of the sliding parts 570 is consistent with the movement direction of the first handle 200, that is, as shown in the figure, they are both vertical.

[0067] It should also be noted that the moving direction of the first handle 200 and the moving direction of the second handle 300 are set at an angle, for example, the angle can be 90°.

[0068] By setting the movement directions of the first handle 200 and the second handle 300 at an angle, their movement trajectories inside the housing 100 are staggered, avoiding spatial conflicts or operational interference caused by their consistent movement directions. Moreover, the non-parallel movement path arrangement not only facilitates the design of a compact switch structure, but also allows operators to intuitively distinguish between primary and secondary operation objects by different operation directions when performing closing or opening actions, reducing the possibility of misoperation.

[0069] In summary, this utility model embodiment provides a fusion switch 10 that, while ensuring the preconditions for closing the main circuit, achieves orderly conduction of the main and secondary circuits through the linkage mechanism between the limit components, effectively reducing current surges during the closing process and improving system stability and safety. Furthermore, since the limit components and their movement path control are integrated within the switch housing 100, no additional space is required, thus meeting the high space utilization requirements of compact electrical equipment without increasing product size.

[0070] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model 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 this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A fusion switch, characterized in that, It includes a housing (100) and a first handle (200), a second handle (300), a first limiting member (400) and a second limiting member (500) disposed on the housing (100); The first handle (200) has a closed state and a closed state to control the main circuit to be turned on or off; the second handle (300) has a closed state and a closed state to control the secondary circuit to be turned on or off, and the secondary circuit is connected in parallel with the main circuit; the first limiting member (400) is drivenly connected to the second handle (300), and the second limiting member (500) is used to fix and cooperate with the second handle (300); When both the first handle (200) and the second handle (300) are in the open state, the first limiting member (400) is located on the movement path of the first handle (200) to restrict the movement of the first handle (200); When the second handle (300) changes from the open state to the closed state, the second handle (300) drives the first limiting member (400) away from the first handle (200) and fixes with the second limiting member (500) to allow the first handle (200) to move to close the circuit.

2. The fusion switch according to claim 1, characterized in that, The second limiting member (500) is movably disposed in the housing (100), and at least a portion of the second limiting member (500) is located in the movement path of the first handle (200); When the first handle (200) changes from the open state to the closed state, the first handle (200) drives the second limiting member (500) to disengage from the second handle (300) so that the second handle (300) can be reset to the open state. When the first handle (200) changes from the closed state to the open state, the first handle (200) disengages from the second limiting member (500) so that the second limiting member (500) is reset.

3. The fusion switch according to claim 2, characterized in that, The fusion switch further includes a first reset member (600), which is disposed in the housing (100) and connected to the second handle (300). The first reset member (600) is used to drive the second handle (300) to reset to the open state when the second handle (300) is disengaged from the second limiting member (500).

4. The fusion switch according to claim 2, characterized in that, The fusion switch further includes a second reset member (700), which is disposed in the housing (100) and connected to the second limiting member (500). The second reset member (700) is used to drive the second limiting member (500) to reset when the first handle (200) is disengaged from the second limiting member (500).

5. The fusion switch according to claim 1, characterized in that, The first limiting member (400) is provided with a first connecting part (410), a second connecting part (420) and a limiting part (430). The first connecting part (410) is movably connected to the housing (100), and the second connecting part (420) is movably connected to the second handle (300). When the second handle (300) is in the open state, the limiting part (430) is located in the movement path of the first handle (200).

6. The fusion switch according to claim 5, characterized in that, The first limiting member (400) further includes a first guide portion (440) connected to the limiting portion (430). The first guide portion (440) is inclined. When the first handle (200) changes from the closed state to the open state, the first guide portion (440) is used to slide against the first handle (200) to make the limiting portion (430) move away from the movement path of the first handle (200). The extension length of the limiting portion (430) in the movement path of the first handle (200) is less than the movement path length of the second handle (300) when it changes from the open state to the closed state.

7. The fusion switch according to claim 3, characterized in that, The second handle (300) includes a first body (310), with a third connecting part (320) and a fourth connecting part (330) respectively provided at both ends of the first body (310). The third connecting part (320) is connected to the reset member, and the fourth connecting part (330) is movably connected to the first limiting member (400). The first body (310) is also provided with a handle part (340) and a first snap-fit ​​part (350) on both sides. The handle part (340) extends out of the housing (100), and the first snap-fit ​​part (350) is used to fix and cooperate with the second limiting member (500).

8. The fusion switch according to claim 4, characterized in that, The second limiting member (500) includes a second body (510). The second body (510) has a fifth connecting part (520) and a second abutting part (530) at one end away from the first handle (200). The fifth connecting part (520) is connected to the second reset member (700). The second abutting part (530) extends to the movement path of the first handle (200). The second body (510) is also provided with a limiting groove (540). A second locking part (550) is provided in the limiting groove (540). When the second handle (300) changes from the open state to the closed state, the first locking part (350) of the second handle (300) is embedded in the limiting groove (540) and engaged with the second locking part (550); when the first handle (200) changes from the open state to the closed state, the first handle (200) abuts against the second abutting part (530) and drives the body to move, so that the second locking part (550) disengages from the first locking part (350).

9. The fusion switch according to claim 8, characterized in that, The second body (510) is provided with a second guide portion (560). The second guide portion (560) is inclined. When the second handle (300) is switched from the open state to the closed state, the first locking portion (350) of the second handle (300) slides against the second guide portion (560) so that the first locking portion (350) is embedded in the limiting groove (540) and engages with the second locking portion (550).

10. The fusion switch according to claim 8, characterized in that, The second body (510) has sliding portions (570) on both sides to form sliding grooves (580), and the sliding grooves (580) are slidably engaged with the housing (100).

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