Electromagnetic switches, actuator systems, integrated contactors, and fuses

Abstract

This disclosure provides an electromagnetic switch comprising: a fixed yoke and a floating yoke disposed opposite to each other; a conductive bar passing through the space between the fixed yoke and the floating yoke; an insulator surrounding the conductive bar; at least one elastic member applying a force to the floating yoke in a direction that moves the floating yoke away from the fixed yoke; and at least one positioning member including a body and a stop portion, the body extending through the floating yoke and the elastic member and extending into or through the insulator, the stop portion restricting movement of the floating yoke. The fixed yoke, the insulator, and the positioning member are fixed together relative to each other. The fixed yoke and the floating yoke are configured as electrical contacts of the electromagnetic switch. An actuator system including the electromagnetic switch and an integrated contactor and fuse including the actuator system are also provided. This disclosure features a simple and compact structure, low cost, high reliability, and fast response speed.

Description

Technical Field

[0001] This disclosure relates to an electromagnetic switch. This disclosure also relates to an actuator system having said electromagnetic switch, and an integrated contactor and fuse having said actuator system. Background Technology

[0002] In electrical switches such as contactors and fuses, it is necessary to promptly and reliably disconnect the circuit in the event of a fault such as a short circuit to prevent hazards such as fire. Contactors and fuses can be used in conjunction with actuators. An actuator, for example, can be a pyrotechnic actuator. When triggered, the pyrotechnic actuator explodes, and the gases produced by the explosion can disconnect the contactor and fuse.

[0003] The actuator can be triggered in two ways: active triggering and passive triggering. Active triggering determines whether to trigger by detecting parameters such as the current in the actuator circuit and then sends a signal to execute the trigger. However, in active triggering, detection and signal transmission take time, typically at least tens of milliseconds, which makes it difficult to meet the requirement of quickly disconnecting the circuit in the event of a fault.

[0004] Passive triggering does not rely on the detection of parameters such as current and signal transmission. It includes triggering using thermal fuses, triggering using Hall effect chips, and magnetic triggering.

[0005] In triggering using a thermal fuse, the thermal fuse is connected in series in the high-voltage circuit of the contactor or fuse. When the current in the high-voltage circuit is too high, the thermal fuse melts, which generates an arc voltage across the actuator and causes current to flow through the actuator, thereby actuating it. However, when the current in the high-voltage circuit is small (e.g., below 5kA), the melting time of the thermal fuse is long (e.g., greater than 20 milliseconds), making it difficult to meet the requirement of quickly disconnecting the circuit in the event of a fault.

[0006] While passive triggering using Hall effect chips can meet the requirement of quickly disconnecting the circuit in the event of a fault, this method is expensive, which limits its large-scale application.

[0007] In addition, existing magnetic triggering devices require a separate linkage opening and closing mechanism, which is relatively complex in structure, large in size, and expensive.

[0008] Therefore, a triggering device that is simple in structure, compact in size, low in cost, and fast in response speed is needed. Summary of the Invention

[0009] One object of this disclosure is to provide an electromagnetic switch with a simple, compact structure and low cost. Another object of this disclosure is to provide an electromagnetic switch with a short response time. Yet another object of this disclosure is to provide an electromagnetic switch with accurate component positioning.

[0010] Another object of this disclosure is to provide an actuator system having such an electromagnetic switch. Yet another object of this disclosure is to provide an integrated contactor or fuse having such an actuator system.

[0011] In one aspect, this disclosure provides an electromagnetic switch comprising a fixed yoke and a floating yoke disposed opposite to each other, wherein the electromagnetic switch further comprises: a conductive bus, at least a portion of which passes between the fixed yoke and the floating yoke; an insulator surrounding the at least a portion of the conductive bus such that the conductive bus is electrically insulated from the fixed yoke and from the floating yoke; at least one elastic element configured to apply a force to the floating yoke in a direction that moves the floating yoke away from the fixed yoke; and at least one positioning element comprising a body and a stop portion, the body extending through the floating yoke and the elastic element, and the body extending to the stop portion. The stop portion is configured to limit the movement of the floating yoke away from the fixed yoke in the direction of the fixed yoke. The fixed yoke, the insulator, and the positioning member are fixed together relative to each other. The fixed yoke and the floating yoke are configured as electrical contacts of the electromagnetic switch. The fixed yoke and the floating yoke are configured such that when the current through the busbar exceeds a predetermined threshold, the floating yoke moves against the force of the elastic member toward the fixed yoke and contacts the fixed yoke, thereby turning on the electromagnetic switch. When the current through the busbar does not exceed the predetermined threshold, the floating yoke and the fixed yoke remain separated and electrically insulated from each other, thereby keeping the electromagnetic switch off.

[0012] In one configuration, the insulator has a first surface facing a fixed yoke and a second surface facing a floating yoke, the fixed yoke abutting against the first surface of the insulator, and the body of the positioning member extends through the insulator and the fixed yoke to fix the insulator, the fixed yoke, and the positioning member together with each other.

[0013] In one configuration, the fixed magnetic yoke and the insulator are integrally formed by injection molding.

[0014] In one configuration, the body of the positioning element and the insulator are integrally formed by injection molding.

[0015] In one configuration, the positioning member further includes at least one sleeve having a through hole, the sleeve extending through the floating yoke and the elastic member, the body of the positioning member passing through the through hole of the sleeve, one end of the sleeve abutting against the insulator, the other end of the sleeve having the stop portion, and the body of the positioning member, the sleeve, the fixed yoke, and the insulator being fixed together relative to each other.

[0016] In one configuration, the body of the positioning member has a first portion and a second portion, the outer diameter of the first portion being larger than the outer diameter of the second portion, the first portion extending through the floating yoke and the elastic member and having a first end abutting against the insulator, the second portion extending from the first end of the first portion through the insulator, and a stop portion disposed at a second end of the first portion opposite to the first end.

[0017] In one configuration, the insulator and the conductive bus are integrally formed by injection molding.

[0018] In one configuration, the floating yoke and the fixed yoke are directly electrically connected to the conductors.

[0019] In a second aspect, this disclosure also provides an actuator system including an actuator, a power supply, and an electromagnetic switch as described above. The actuator includes an actuation mechanism, and the actuator, the electromagnetic switch, and the power supply are connected in series. The actuator is configured such that when the electromagnetic switch is turned on, the actuation mechanism is actuated.

[0020] In one configuration, the actuator further includes a first connection terminal and a second connection terminal, the first connection terminal being electrically connected to one of the fixed magnetic yoke and the floating magnetic yoke in the electromagnetic switch, the other of the fixed magnetic yoke and the floating magnetic yoke being electrically connected to one end of the power supply, and the second connection terminal being electrically connected to the other end of the power supply.

[0021] In one configuration, the actuator is a gunpowder-type actuator, which includes a gunpowder section configured to cause deflagration when the electromagnetic switch is turned on, and the pressure generated by the deflagration drives the actuation mechanism to perform an actuation action.

[0022] In a third aspect, this disclosure also provides an integrated contactor including a moving contact and a stationary contact, wherein the integrated contactor further includes an actuator system as described above, wherein the actuation action of the actuation mechanism separates the moving contact and the stationary contact from each other, and one end of the conductive bar of the electromagnetic switch is electrically connected to the stationary contact.

[0023] In a fourth aspect, this disclosure also provides a fuse, wherein the fuse includes an actuator system as described above, the conductive busbar in the actuator system included in the fuse having a weak portion, and the actuation action of the actuation mechanism causes the weak portion to disconnect.

[0024] This disclosure has at least the following beneficial effects:

[0025] The electromagnetic switch disclosed herein has a compact and simple structure, is easy to assemble, and is low in cost.

[0026] 2. In the electromagnetic switch of this disclosure, the fixed magnetic yoke and the floating magnetic yoke directly serve as the electrical contacts of the switch, which further simplifies the structure, increases reliability, and improves response speed.

[0027] 3. The electromagnetic switch of this disclosure, by providing the positioning element as described above and fixing the fixed yoke, insulator and positioning element together relative to each other, can also make the positioning between components accurate and the reliability high during operation.

[0028] 4. Since the fixed yoke and the floating yoke directly serve as the electrical contacts of the switch in the passive triggering circuit, the actuator system with the electromagnetic switch of this disclosure and the integrated contactor and fuse structure integrating the actuator system are simpler, more reliable, and have a faster response speed. Attached Figure Description

[0029] The various objectives, features, and advantages of this disclosure will become more apparent from the following description of preferred embodiments of the disclosure, taken in conjunction with the accompanying drawings. The drawings are merely illustrative of the present disclosure and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts.

[0030] Figure 1 This is an exploded view of an electromagnetic switch according to a first embodiment of the present disclosure.

[0031] Figure 2A It is in a disconnected state. Figure 1 The side view of the electromagnetic switch shown.

[0032] Figure 2B It is along Figure 2A The sectional view taken by line AA in the figure.

[0033] Figure 3A It is in the connected state. Figure 1 The side view of the electromagnetic switch shown.

[0034] Figure 3B It is along Figure 3A The sectional view taken from line BB in the middle.

[0035] Figure 4 This is an exploded view of an electromagnetic switch according to a second embodiment of the present disclosure.

[0036] Figure 5A It is in a disconnected state. Figure 4 The side view of the electromagnetic switch shown.

[0037] Figure 5B It is along Figure 5A The sectional view taken by line AA in the figure.

[0038] Figure 6A It is in the connected state. Figure 4 The side view of the electromagnetic switch shown.

[0039] Figure 6B It is along Figure 6A The sectional view taken from line BB in the middle.

[0040] Figure 7 This is an exploded view of an electromagnetic switch according to a third embodiment of the present disclosure.

[0041] Figure 8A It is in a disconnected state. Figure 7 The side view of the electromagnetic switch shown.

[0042] Figure 8B It is along Figure 8A The sectional view taken by line AA in the figure.

[0043] Figure 9A It is in the connected state. Figure 7 The side view of the electromagnetic switch shown.

[0044] Figure 9B It is along Figure 9A The sectional view taken from line BB in the middle.

[0045] Figure 10 This is an exploded view of an electromagnetic switch according to a fourth embodiment of the present disclosure.

[0046] Figure 11 yes Figure 10 The image shows a longitudinal sectional view of the electromagnetic switch.

[0047] Figure 12 It is in a disconnected state. Figure 10 A partial cross-sectional view of the electromagnetic switch shown.

[0048] Figure 13 It is in the connected state. Figure 10 A partial cross-sectional view of the electromagnetic switch shown.

[0049] Figure 14This is a partial cross-sectional view of an electromagnetic switch according to a fourth embodiment of the present disclosure in the off state.

[0050] Figure 15 This is an exploded view of an electromagnetic switch according to a fifth embodiment of the present disclosure.

[0051] Figure 16 It is in a disconnected state. Figure 15 A partial cross-sectional view of the electromagnetic switch shown.

[0052] Figure 17 It is in the connected state. Figure 15 A partial cross-sectional view of the electromagnetic switch shown.

[0053] Figure 18 This is a circuit diagram of an actuator system having an electromagnetic switch according to the present disclosure.

[0054] Figure 19 It is a schematic partial cross-sectional view of an integrated electric trigger having an actuator system according to the present disclosure.

[0055] Figure 20 This is a schematic partial cross-sectional view of a fuse having an actuator system according to this disclosure. Detailed Implementation

[0056] The present disclosure will now be described with reference to the accompanying drawings, which illustrate embodiments of the present disclosure. However, it should be understood that the present disclosure can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure more complete and to fully illustrate the scope of protection of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide further additional embodiments.

[0057] It should be understood that the same reference numerals denote the same elements in all the accompanying drawings. For clarity, the dimensions of certain features may be modified in the drawings.

[0058] Unless otherwise stated, the terminology used herein (including technical and scientific terms) should have the meaning that would be normally understood by one of ordinary skill in the art to which this disclosure pertains. Unless otherwise stated, the terms “comprising,” “including,” “having,” and similar terms as used in the specification and claims should be interpreted in an open-ended sense, that is, “comprising,” “including,” and “having” should be interpreted as synonymous with the terms “at least comprising,” “at least containing,” and “at least having.”

[0059] Unless otherwise stated, the directional terms “upper,” “lower,” “left,” “right,” “top,” “bottom,” etc., used in this disclosure refer to relative orientations in the states shown in the accompanying drawings, and do not constitute any limitation on the absolute orientation of the defined product.

[0060] The ordinal words “first”, “second”, etc., used in this disclosure are merely for distinguishing terms and do not impose any restrictions on the order, importance, or compositional differences of the features being modified.

[0061] Unless otherwise stated, the terms “electrical connection,” “connection,” “link,” “connected,” or similar terms as used in this disclosure include direct “electrical connection,” “connection,” “link,” or “connected” between components, as well as indirect “electrical connection,” “connection,” “link,” or “connected” between components via other media.

[0062] It should be understood that the terminology used in this specification is for describing specific embodiments only and is not intended to limit this disclosure. For the sake of brevity and / or clarity, well-known functions or structures may not be described in detail.

[0063] Figures 1 to 3B An electromagnetic switch according to a first embodiment of the present disclosure is schematically shown. Figures 4 to 6B An electromagnetic switch according to a second embodiment of the present disclosure is schematically shown. Figures 7 to 9B An electromagnetic switch according to a third embodiment of the present disclosure is schematically shown. Figures 10 to 13 An electromagnetic switch according to a fourth embodiment of the present disclosure is schematically shown. Figure 14 An electromagnetic switch according to a variation of the fourth embodiment of the present disclosure is schematically shown. Figures 15 to 17 An electromagnetic switch according to a fifth embodiment of the present disclosure is schematically shown.

[0064] The overall structure of the electromagnetic switch of this disclosure will first be described below. It is understood that the structure described below can be applied to the various embodiments and variations thereof mentioned above without departing from this disclosure.

[0065] The electromagnetic switch 100 disclosed herein may include a fixed magnetic yoke 31 and a floating magnetic yoke 32. The fixed magnetic yoke 31 and the floating magnetic yoke 32 may be arranged opposite to each other. The fixed magnetic yoke 31 and the floating magnetic yoke 32 may be made of a material that can be magnetized under the influence of a magnetic field. For example, the fixed magnetic yoke 31 and the floating magnetic yoke 32 may be made of a ferromagnetic material. The ferromagnetic material is, for example, but not limited to, iron. When the fixed magnetic yoke 31 and the floating magnetic yoke 32, arranged opposite to each other, are magnetized under the influence of a magnetic field, they can generate an attractive force between them. The fixed magnetic yoke 31 may be a flat magnetic yoke, and the floating magnetic yoke 32 may be a U-shaped magnetic yoke. The two parallel arms of the U-shaped magnetic yoke may be opposite to the fixed magnetic yoke 31. It is understood that the fixed magnetic yoke 31 may also be a U-shaped magnetic yoke and the floating magnetic yoke 32 may be a flat magnetic yoke. The fixed magnetic yoke 31 and the floating magnetic yoke 32 may also be of other shapes.

[0066] The electromagnetic switch 100 may further include a conductive busbar 1. The conductive busbar 1 can be used to connect to a high-voltage circuit, such as a contactor or fuse in the high-voltage circuit. The high-voltage circuit may, for example, be powered by a power battery of an electric vehicle. The conductive busbar 1 may be a conductive plate made of conductive metal. The conductive busbar 1 is, for example, a copper busbar or an aluminum busbar. The conductive busbar 1 may be straight or, depending on connection requirements, may be configured to have at least one bend, such as a Z-shape as shown in the views of various embodiments.

[0067] At least a portion of the conductive bus 1 passes between the fixed yoke 31 and the floating yoke 32. That is, the at least portion of the conductive bus 1 can be disposed within the space enclosed by the fixed yoke 31 and the floating yoke 32. In one configuration, as shown in the views of various embodiments, the middle portion of the conductive bus 1 passes between the fixed yoke 31 and the floating yoke 32. When current flows through the conductive bus 1, a magnetic field is generated around the conductive bus 1. This magnetic field can magnetize the fixed yoke 31 and the floating yoke 32, and generate an attractive force between them.

[0068] The electromagnetic switch 100 may further include an insulator 2. The insulator 2 may be made of any suitable insulating material, such as resin or plastic. The insulator 2 may surround at least a portion of the conductive busbar 1. The insulator 2 may at least surround the portion of the conductive busbar 1 passing between the fixed yoke 31 and the floating yoke 32. The insulator 2 serves to electrically insulate the conductive busbar 1 from the fixed yoke 31 and from the floating yoke 32. Thus, the insulator 2 electrically insulates the portion of the electromagnetic switch connected to the high-voltage circuit and the portion of the electromagnetic switch connected to the low-voltage circuit from each other.

[0069] The conductive busbar 1 can be integrally formed with the insulator 2. The insulator 2 and the conductive busbar 1 can be formed as a single unit, for example, through injection molding. This method is simple and has low manufacturing costs.

[0070] The electromagnetic switch 100 may further include at least one elastic element 4. The elastic element 4 may be a spring, such as a coil spring. It is understood that the elastic element may also be other components besides a spring, such as an elastic sheet. The number of elastic elements 4 may be one or two (e.g., ...). Figure 14 (As shown) or more. The elastic element 4 is configured to apply a force to the floating yoke 32 in a direction that moves the floating yoke 32 away from the fixed yoke 31 (i.e., to the right in the views of the various embodiments). In one configuration, the elastic element 4 may be disposed between the insulator 2 and the floating yoke 32, with one end of the elastic element 4 abutting against the insulator 2 and the other end of the elastic element 4 abutting against the floating yoke 32.

[0071] The electromagnetic switch 100 may further include at least one positioning element 5. The positioning element 5 may be made of insulating material or non-insulating material. It is understood that the number of positioning elements 5 may be the same as the number of elastic elements 4, or it may be one, two, or more. The positioning element may include a body 51. The body 51 may be a shaft. The body 51 may be configured to extend through the floating yoke 32 and the corresponding elastic element 4. The body 51 may also be configured to extend into or through the insulator 2. The fixed yoke 31, the insulator 2, and the positioning element 5 are fixed together relative to each other. This may mean that the fixed yoke 31, the insulator 2, and the positioning element 5 cannot move relative to each other. In this way, the main components of the electromagnetic switch 100 are compactly combined by the positioning element 5, and the floating yoke 32 can move along the body of the positioning element, achieving a compact, simple, easy-to-assemble, and low-cost electromagnetic switch. The fixing of the fixed magnetic yoke 31, the insulator 2 and the positioning member 5 can be achieved by various methods such as threaded connection, riveting, clamping, hot melting, bonding, welding and / or interference fit.

[0072] The positioning member 5 may further include a stop 6. The stop 6 is configured to restrict the movement of the floating yoke 32 in a direction away from the fixed yoke 31. The stop 6 may be located on the side of the floating yoke 32 opposite to the fixed yoke 31, so that when the floating yoke 32 moves in a direction away from the fixed yoke 31, the floating yoke 32 contacts the stop 6, thereby defining the position of the floating yoke 32. When the fixed yoke 31, the insulator 2, and the positioning member 5 are fixed together relative to each other, the stop 6 can also accurately define the initial position and travel distance of the fixed yoke 31 relative to the floating yoke 32, making the electromagnetic switch 100 of this disclosure easy to assemble accurately and with high reliability.

[0073] The fixed magnetic yoke 31 and the floating magnetic yoke 32 can be configured such that, when the current through the busbar 1 exceeds a predetermined threshold, the floating magnetic yoke 32 overcomes the force of the elastic element 4 and moves towards the fixed magnetic yoke 31 to contact it, thereby turning on the electromagnetic switch. When the current through the busbar 1 does not exceed the predetermined threshold, the floating magnetic yoke 32 and the fixed magnetic yoke 31 remain separated and electrically insulated from each other, thus keeping the electromagnetic switch off. The predetermined threshold can be selected based on the maximum current allowed by the high-voltage circuit where the busbar 1 is located.

[0074] In the electromagnetic switch 100 of this disclosure, the fixed yoke 31 and the floating yoke 32 are configured to be electrically insulated from each other without contact. The fixed yoke 31 and the floating yoke 32 can be used directly as electrical contacts of the electromagnetic switch. The positioning member 5 being made of insulating material further facilitates this. Compared to an opening and closing mechanism that requires further linkage, the direct use of the fixed yoke 31 and the floating yoke 32 as electrical contacts of the electromagnetic switch greatly simplifies the structure and reduces costs. In this case, in the electromagnetic switch 100 of this disclosure, the fixed yoke 31 and the floating yoke 32 can be directly electrically connected to wires to access a low-voltage circuit and serve as the stationary and moving contacts of the electromagnetic switch in the low-voltage circuit, respectively.

[0075] The embodiments are described below with reference to the accompanying drawings. The features described above can be applied to the various embodiments described below; therefore, in the description of each embodiment, features already described above will not be repeated.

[0076] First Embodiment

[0077] Figures 1 to 3BAn electromagnetic switch 100 according to a first embodiment of the present disclosure is shown. In this embodiment, the insulator 2 may have a first surface 24 facing a fixed yoke 31 and a second surface 25 facing a floating yoke 32. The fixed yoke 31 abuts against the first surface 24 of the insulator 2, thereby facilitating the fixing of the fixed yoke to the insulator 2. The body 51 of the positioning member 5 extends through the insulator 2 and the fixed yoke 31 to fix the insulator 2, the fixed yoke 31, and the positioning member 5 together with each other.

[0078] In the illustrated example, the fixed yoke 31 is a U-shaped yoke. The U-shaped yoke surrounds the insulator 2. The floating yoke 32 is a flat yoke. However, it is understood that this embodiment is not limited to this; the fixed yoke 31 can be a flat yoke, the floating yoke can be a U-shaped yoke, or both the fixed yoke 31 and the floating yoke 32 can be U-shaped yokes.

[0079] In this embodiment, the stop portion 6 may be disposed at one end of the body 51 of the positioning member 5 located on the floating yoke side. The stop portion 6 may be a diameter-enlarged portion relative to the body 51. The diameter-enlarged portion may be a head with an increased diameter of the body 51. Alternatively, the diameter-enlarged portion may also be a riveted portion formed by stamping one end of the body 51.

[0080] The other end of the body 51 may have a limiting portion 52. The limiting portion 52 may be a diameter-enlarged portion relative to the body 51. This diameter-enlarged portion may be a riveted portion formed by hot riveting or cold pressing. The limiting portion 52 can restrict the movement of the fixed magnetic yoke 31 to the left in the figure and position the fixed magnetic yoke, the insulator 2, and the positioning member 5 relative to each other. In order to fix the insulator 2, the fixed magnetic yoke 31, and the positioning member 5 together, an interference fit may be formed between the body 51 of the positioning member 5 and the insulator 2 and the fixed magnetic yoke 31 through which it passes.

[0081] Although only one example of using a positioning element 5 and an elastic element 4 is shown in this embodiment, it is understood, as previously stated, that the number of positioning elements and elastic elements is not limited to this, and two or more positioning elements and elastic elements may also be used.

[0082] With the above structure, the electromagnetic switch 100 according to this embodiment has a simple and compact structure and is easy and accurate to assemble.

[0083] Furthermore, in one configuration, the insulator 2 may include a first portion 21, a second portion 22, and a third portion 23. The first portion 21 and the second portion 22 are parallel to each other. The third portion 23 is perpendicular to the first portion 21 and the second portion 22 and is located between the first and second portions. In the direction along which the fixed yoke 31 and the floating yoke 32 move relative to each other, the lengths of the first portion 21 and the second portion 22 are greater than the length of the third portion 23. At least a portion of the conductive bus 1 passes through the first portion 21, the second portion 22, and the third portion 23. In this configuration, the first surface 24 and the second surface 25 may be opposite surfaces of the third portion 23. This configuration can increase the creepage distance between conductive components.

[0084] Furthermore, the insulator 2 may have at least one opening 26. The at least one opening 26 allows the body 51 of the positioning member 5 to pass through. The opening 26 may be located in the third portion 23 of the insulator 2 and extend parallel to the first portion 21 and the second portion 22. The conductive bus 1 is configured to bypass the opening 26 when passing through the insulator 2. The conductive bus 1 can separate from each other after entering the insulator 2 to avoid the opening 26. That is, the entire surface of the portion of the conductive bus 1 within the insulator 2 is surrounded by insulating material. Thus, the body 51 of the positioning member 5 is insulated from the conductive bus 1 through the insulator 2, thereby ensuring insulation between the high-voltage circuit and the low-voltage circuit.

[0085] Second Embodiment

[0086] Figures 4 to 6B An electromagnetic switch 100 according to a second embodiment of the present disclosure is shown. For the sake of brevity, the features of the electromagnetic switch 100 of the second embodiment that are the same as those of the first embodiment will not be described again; only the features that are different from those of the first embodiment will be described below.

[0087] In the electromagnetic switch 100 of the second embodiment, such as Figure 5B and Figure 6B As shown, the fixed magnetic yoke 31 and the insulator 2 are integrally formed by injection molding. This further simplifies the structure of the electromagnetic switch 100 and makes the installation and manufacture of the electromagnetic switch simpler.

[0088] In one configuration, the fixed magnetic yoke 31 is injection-molded into the insulator 2 and insulated from components such as the positioning member 5 and the conductive busbar 1 by the insulator 2. This ensures reliable insulation between components in the electromagnetic switch 100 that need to be insulated from each other. The fixed magnetic yoke 31 is configured to contact the floating magnetic yoke 32 through its exposed contact surface 311.

[0089] like Figure 5Band Figure 6B As shown, in one configuration, the body 51 of the positioning member 5 can extend through the floating magnetic yoke 32, the elastic member 4, and the insulator 2. The positioning member 5 can be configured to be fixed to each other relative to the insulator 2.

[0090] In this embodiment, the stop portion 6 may be disposed at one end of the body 51 of the positioning member 5 located on the floating yoke side. The stop portion 6 may be a portion with an increased diameter relative to the body 51. For example... Figure 4 , Figure 5B and Figure 6B As shown, the diameter-enlarged portion may be a riveted portion formed by stamping one end of the body 51.

[0091] The other end of the body 51 that passes through the insulator 2 may have a limiting portion 52. The limiting portion 52 may be a portion with an increased diameter relative to the body 51. For example... Figure 4 , Figure 5B and Figure 6B As shown, the diameter-enlarged portion can be the head of the body 51 with an increased diameter. The limiting portion 52 can restrict the movement of the fixed magnetic yoke 31 to the left in the figure and keep the fixed magnetic yoke 31, the insulator 2 and the positioning member 5 in relative position.

[0092] It is understood that the stop portion 6 may also be the head of the body 51 with an increased diameter, and the limiting portion 52 may be a riveted portion formed by hot riveting or cold pressing.

[0093] In order to fix the insulator 2, the fixed magnetic yoke 31 and the positioning member 5 together, the body 51 of the positioning member 5 can also form an interference fit with the insulator 2 through which it passes.

[0094] Furthermore, it is understood that, when positioning member 5 and insulator 2 are fixed together relative to each other, the body 51 of positioning member 5 may not extend through insulator 2, but only extend into insulator 2 and be fixed to each other relative to insulator 2 by interference fit, threaded connection or any other suitable means.

[0095] Although only one example of using a positioning element 5 and an elastic element 4 is shown in this embodiment, it is understood, as previously stated, that the number of positioning elements and elastic elements is not limited to this, and two or more positioning elements and elastic elements may also be used.

[0096] Third Embodiment

[0097] Figures 7 to 9BAn electromagnetic switch 100 according to a third embodiment of the present disclosure is shown. Most of the structure of the electromagnetic switch 100 according to the third embodiment of the present disclosure is the same as that described in the second embodiment. For the sake of brevity, identical features will not be repeated; only features different from those in the second embodiment will be described below.

[0098] In the electromagnetic switch 100 of the third embodiment, such as Figure 8B and Figure 9B As shown, the body 51 of the positioning member 5 and the insulator 2 are integrally formed by injection molding. This achieves the fixation between the positioning member 5, the insulator 2, and the fixing yoke 31 in a simpler way.

[0099] In one configuration, at least a portion of the body 51 of the positioning member 5, which is injection-molded into the insulator, has a protrusion 53. The protrusion 53 enhances the connection between the positioning member 5 and the insulator 2, thereby more reliably securing the positioning member 5 and the insulator 2 together.

[0100] In this embodiment, the stop 6 can be disposed at one end of the body 51 of the positioning member 5 located on the floating magnetic yoke side. For example... Figure 4 , Figure 5B and Figure 6B As shown, the stop portion 6 can be a riveted portion formed by stamping one end of the body 51, which is larger in size relative to the body. It is understood that the stop portion is not limited to this, and it can be any structure that can restrict the movement of the floating yoke 32 in a direction away from the fixed yoke 31.

[0101] Although only one example of using a positioning element 5 and an elastic element 4 is shown in this embodiment, it is understood, as previously stated, that the number of positioning elements and elastic elements is not limited to this, and two or more positioning elements and elastic elements may also be used.

[0102] Fourth embodiment

[0103] Figures 10 to 13 An electromagnetic switch 100 according to a fourth embodiment of the present disclosure is shown. Most of the structure of the electromagnetic switch 100 according to the fourth embodiment of the present disclosure is substantially the same as that described in the first embodiment. For the sake of brevity, identical features will not be repeated; only features different from those in the first embodiment will be described below.

[0104] In this embodiment, the positioning member 5 further includes at least one sleeve 7. The sleeve 7 has a through hole 73. The sleeve 7 extends through the floating magnetic yoke 32 and the elastic member 4. The body 51 of the positioning member 5 passes through the through hole 73 of the sleeve 7. The body 51 of the positioning member 5, the sleeve 7, the fixed magnetic yoke 31, and the insulator 2 are fixed together relative to each other.

[0105] In one configuration, the sleeve may be an insulating sleeve. The positioning member 5 is insulated from the floating magnetic yoke 32 by the insulating sleeve. By the cooperation between the body and the sleeve, a fastening is achieved while ensuring that the fixed magnetic yoke 31 and the floating magnetic yoke 32 are electrically insulated from each other when not in contact.

[0106] It is understood that the number of sleeves 7 can be the same as the number of elastic elements 4, or it can be one, two or more.

[0107] In one configuration, the sleeve 7 may include a cylindrical body 71. The sleeve 7 may also have a stop 6 as described above. The cylindrical body 71 has a first end 711 and a second end 712 opposite to the first end 711. The cylindrical body 71 extends through the floating yoke 32 and the corresponding elastic member 4, and the end face of the first end 711 of the cylindrical body 71 abuts against the second surface 25 of the insulator 2. The stop 6 may be disposed at the second end 712 of the cylindrical body 71 and serves to restrict the movement of the floating yoke 32 in a direction away from the fixed yoke 31. The stop 6 may be a dimensionally enlarged portion relative to the size of the cylindrical body 71. During the movement of the floating yoke 32 in a direction away from the fixed yoke 31, the floating yoke 32 contacts the stop 6, thereby defining the position of the floating yoke 32.

[0108] With the fixed yoke 31, the insulator 2, and the sleeve 7 fixed together relative to each other, the sleeve 7 abuts against the insulator 2, and the stop portion 6 of the sleeve 7 restricts the movement of the floating yoke away from the fixed yoke. Therefore, the initial position and travel distance of the fixed yoke 31 relative to the floating yoke 32 can be accurately defined. The cooperation of the positioning element, the sleeve, and other components also makes the electromagnetic switch 100 of this embodiment simple and compact in structure, low in cost, and easy and accurate to assemble with high reliability.

[0109] Meanwhile, in the electromagnetic switch 100 of this embodiment, the floating yoke 32 can be configured to move along the outer wall of the cylindrical body 71 of the sleeve 7. In one configuration, the cylindrical body 71 of the sleeve 7 can be a cylinder, such as a cylinder body. The floating yoke 32 may have at least one through hole 33. The cylindrical body 71 passes through the through hole 33 of the floating yoke 32. That is, the floating yoke 32 is fitted onto the outer wall of the cylindrical body 71. The dimensions of the cylindrical body 71 and the through hole 33 are set such that the floating yoke 32 can move along the outer wall of the cylindrical body 71. With this configuration, the sleeve 7, in addition to the insulation and limiting functions described above, can also guide the movement of the floating yoke 32, thereby enabling the floating yoke 32 to move more stably and smoothly, thus achieving reliable switching on and off of the electromagnetic switch.

[0110] In the electromagnetic switch of this embodiment, the body 51 of the positioning member 5 can also be a shaft. The shaft passes through the fixed magnetic yoke 31, the opening 26 of the insulator 2, and the through hole 73 of the corresponding sleeve. The structure of the insulator 2 and its opening 26 can be the same as in the first embodiment, and will not be described again here. In addition, portions for fixing and / or limiting can be provided at one or both ends of the shaft to fix the fixed magnetic yoke 31, the insulator 2, and the corresponding sleeve together.

[0111] The electromagnetic switch 100, which consists of the conductive busbar 1, insulator 2, fixed magnetic yoke 31, floating magnetic yoke 32, sleeve 7, elastic element 4 and positioning element 5 as described above, has a simple structure, is easy to assemble, has low cost, is compact and has high reliability.

[0112] In this embodiment, the two ends of the body of the positioning member 5 may each have a head with an increased diameter serving as a limiting part 52 and a nut 54. The limiting part 52 may be disposed on the side of the fixed magnetic yoke 31. After the positioning member 5 is tightened, the limiting part 52 abuts against the fixed magnetic yoke 31 to limit the fixed magnetic yoke 31. The shaft of the positioning member 5 passes through the through hole 73 of the fixed magnetic yoke 31, the insulator 2, and the corresponding sleeve 7. The tail end of the shaft is tightened to the stop part 6 of the sleeve 7 by the nut 54. Due to the sleeve, the fixed magnetic yoke 31 and the floating magnetic yoke 32 are not electrically connected to each other via the positioning member 5 and the nut 54. At the same time, such a structure is simple to manufacture, easy to assemble, low in cost, compact in structure, and highly reliable. It is understood that the limiting part 52 of the positioning member 5 may also be disposed on the side of the floating magnetic yoke 32, and the nut 54 may be disposed on the side of the fixed magnetic yoke 31.

[0113] Furthermore, it is understood that the positioning member 5 is not limited to the structure described above. A riveting portion may also be provided at at least one end of the shaft portion of the positioning member 5 to fix the fixing yoke 31, the insulator 2, and the sleeve 7 together relative to each other. The riveting portion may be formed by hot riveting or cold pressing processes.

[0114] In the illustrations of this embodiment, the number of the positioning member 5, the elastic member 4, and the sleeve 7 is one. However, it is understood that the number of the above components can be two or more. For example, in Figure 14 In the variation of the fourth embodiment shown, two positioning members 5 with bodies 51, two elastic members 4, and two sleeves 7 are provided. Each sleeve 7 passes through the floating magnetic yoke 32 and abuts against the second surface 25 of the insulator 2. The body 51 of each positioning member passes through the fixed magnetic yoke 31, the insulator 2, and the corresponding sleeve 7, fixing the fixed magnetic yoke 31, the insulator 2, and the corresponding sleeve 7 together. The structure of each positioning member, each elastic member 4, and each sleeve 7 can be the same as... Figures 10 to 13 The structure is the same in the fourth embodiment shown. Adding two or more positioning elements, springs, and positioning components can improve the reliability of the electromagnetic switch.

[0115] In addition, it is understood that in the technical solution with sleeve 7 in this embodiment, the technical features described in the previous embodiments can also be adopted. For example, the structure and related features of the fixed magnetic yoke and the insulator being injection molded as one piece as described in the second embodiment can be adopted, as well as the structure and related features of the positioning member body and the insulator being injection molded as one piece as described in the third embodiment.

[0116] Fifth embodiment

[0117] Figures 15 to 17 An electromagnetic switch 100 according to a fifth embodiment of the present disclosure is shown. For the sake of brevity, features that are the same as those in the previously described embodiments will not be repeated; only the different features will be described below.

[0118] exist Figures 15 to 17In the fifth embodiment of the electromagnetic switch shown, the sleeve 7 described above may not be required. Instead, the body 51 of the positioning member 5 has a first portion 511 and a second portion 512. The outer diameter of the first portion 511 is larger than the outer diameter of the second portion 512. The outer diameter of the first portion 511 may be set to be larger than the diameter of the opening 26 of the insulator 2. The first portion 511 extends through the floating yoke 32 and the elastic member 4 and has a first end 5111 abutting against the insulator 2. The second portion 512 extends from the first end of the first portion 511 through the insulator 2. The stop portion 6 is provided at the second end 5112 of the first portion 511 opposite to the first end 5111.

[0119] In one configuration, the second portion 512 extends through the insulator 2 and the fixed yoke 31 and is fixedly connected to the fixed yoke 31. The second portion 512 can be fixedly connected to the fixed yoke 31, for example, via a limiting portion 52. The limiting portion 52 can be formed by a hot riveting process. In this embodiment, the positioning member 5 fixes the fixed yoke 31, the insulator 2, and the positioning member 5 together relative to each other via the limiting portion 52. Simultaneously, the positioning member 5 can also fix the relative position between the fixed yoke 31 and the floating yoke 32 in the initial state by abutting the first end 5111 of the first portion 511 against the second surface 25 of the insulator 2. Furthermore, the positioning member 5 can also restrict the movement of the floating yoke 32 in a direction away from the fixed yoke via a stop portion 6. When the positioning member 5 is an insulating positioning member, it can also keep the fixed yoke 31 and the floating yoke 32 insulated from each other when they are not in contact. Therefore, the electromagnetic switch of this embodiment has a simpler structure, is easier to assemble, and is less expensive. It is understood that the second part 512 can also be fixedly connected to the fixed magnetic yoke 31 in other known ways besides the limiting part 52, such as a threaded connection.

[0120] It is understood that in the electromagnetic switch of this embodiment, the number of the positioning element and the elastic element is not limited to one; there can be two or more. This can achieve a similar technical effect to that described in the previous prime number embodiments.

[0121] In addition, it is understood that the technical features described in the preceding embodiments can also be used in the technical solution of this embodiment. For example, the structure and related features of the fixed magnetic yoke and the insulator being injection molded together as described in the second embodiment can be used, as can the structure and related features of the positioning member body and the insulator being injection molded together as described in the third embodiment.

[0122] Furthermore, although this embodiment shows a second portion 512 of the body 51 of the positioning member 5 extending through the insulator 2 and the fixed magnetic yoke 31, this embodiment is not limited to this. The second portion 512 may not penetrate the insulator 2 and / or the fixed magnetic yoke 31, as long as the second portion fixes the fixed magnetic yoke and the insulator relative to each other. For example, the second portion may also be fixed to the insulator and / or the fixed magnetic yoke by a threaded portion. For example, threads may be provided on the outer peripheral surface of the second portion 512, the inner surface of the fixed magnetic yoke, and the inner peripheral surface of the opening 26 of the insulator 2, thereby fixing the positioning member 5 to the insulator 2 and the fixed magnetic yoke 31. Alternatively, the positioning member, the insulator, and the fixed magnetic yoke may also be fixed relative to each other by an interference fit.

[0123] Figure 18 A circuit diagram of an actuator system having an electromagnetic switch according to the present disclosure is shown schematically. For ease of understanding, only the main components are shown in the figure, while other components are omitted.

[0124] The actuator system can be integrated, for example, into an integrated contactor or fuse, to disconnect the integrated contactor or fuse upon reaching a trigger condition, thereby disconnecting the high-voltage circuit. The electromagnetic switch 100 of this disclosure, as described above, can be connected in series in the passive triggering circuit 400 of the actuator system, serving as the switch for that passive triggering circuit 400. The fixed yoke 31 and the floating yoke 32 can respectively serve as the fixed contact and moving contact of the switch.

[0125] like Figure 18 As schematically shown, the actuator system includes an actuator 8, a power supply 401, and an electromagnetic switch 100 according to this disclosure. The actuator 8 includes a first connection terminal 82 and a second connection terminal 81. The power supply 401, the actuator 8, and the electromagnetic switch 100 are connected in series in the passive trigger circuit 400. Specifically, the first connection terminal 82 can be electrically connected to one of the fixed yoke 31 and the floating yoke 32 in the electromagnetic switch 100. The other of the fixed yoke 31 and the floating yoke 32 is electrically connected to one end of the power supply 401. The second connection terminal 81 is electrically connected to the other end of the power supply 401. For example, in… Figure 18 In the example shown, the first connection terminal 82 is electrically connected to the floating magnetic yoke 32, the fixed magnetic yoke 31 is electrically connected to the positive terminal of the power supply, and the second connection terminal 81 is electrically connected to the negative terminal of the power supply 401.

[0126] The actuator 8 also includes an actuation mechanism 83, such as a piston (e.g., Figure 19 and Figure 20(As shown). The actuator 8 is configured such that when the electromagnetic switch 100 is turned on, the actuation mechanism 83 is actuated. The actuation can cause the integrated contactor or fuse incorporating the actuator system to disconnect, thereby disconnecting the high-voltage circuit.

[0127] The actuator may be, for example, a gunpowder-type actuator. The gunpowder-type actuator includes a gunpowder section 84 (see...). Figure 19 and Figure 20 The propellant section 84 is configured to undergo deflagration when the electromagnetic switch 100 is turned on. The pressure generated by the deflagration drives the actuation mechanism 83 to perform the actuation action.

[0128] Since the fixed magnetic yoke 31 and the floating magnetic yoke 32 in the electromagnetic switch can be directly connected to the circuit as electrical contacts, the actuator system integrating the electromagnetic switch of this disclosure has a simpler structure and a faster response speed.

[0129] It is understood that the actuator system may also include an active trigger circuit 500. The active trigger circuit 500 includes components such as a power supply 501 and a detection device, and is used to cause the actuator mechanism to actuate when the detection value of the detection device meets the triggering condition. In this way, the actuator system can simultaneously possess both active and passive triggering functions.

[0130] Figure 19 A schematic partial cross-sectional view of an integrated electrical trigger 200 according to the present disclosure is shown. The integrated electrical trigger 200 can be connected in a high-voltage circuit to achieve circuit switching. The integrated electrical trigger 200 may include a stationary contact 201 and a moving contact 202. When the stationary contact 201 and the moving contact 202 are in contact with each other, the integrated electrical trigger 200 is turned on to conduct the high-voltage circuit to which it is connected; when the stationary contact 201 and the moving contact 202 are separated from each other, the integrated electrical trigger 200 is turned off to disconnect the high-voltage circuit to which it is connected. The integrated electrical trigger 200 also includes an actuator system as described above. The actuator system includes an electromagnetic switch 100 of the present disclosure. One end of the conductive bar 1 of the electromagnetic switch 100 is electrically connected to the stationary contact 201. When the current in the high-voltage circuit containing the integrated electric trigger 200 is too high, the circuit in the busbar 1 exceeds a predetermined threshold. The fixed magnetic yoke 31 and the floating magnetic yoke 32, which serve as electrical contacts of the electromagnetic switch 100, come into contact with each other, causing the electromagnetic switch 100 to activate. Correspondingly, the passive trigger circuit 400 is activated. This causes the propellant section 84 to deflagrate. The pressure generated by the deflagration pushes the piston, which serves as the actuation mechanism 83, downward, thereby causing the moving contact 202 to move downward and separate from the stationary contact. This causes the integrated electric trigger 200 to deactivate and disconnects the high-voltage circuit containing it.

[0131] Figure 20 A schematic partial cross-sectional view of a fuse 300 according to the present disclosure is shown. The fuse 300 can be connected in a high-voltage circuit to achieve circuit switching. The fuse 300 may include the conductive bar 1 of an electromagnetic switch 100. The fuse 300 also includes an actuator system as described above. The actuator system includes the electromagnetic switch 100 of the present disclosure. One end of the conductive bar 1 of the electromagnetic switch 100 is integrated into the fuse. The portion of the conductive bar 1 integrated into the fuse has a weak portion 14. When the current in the high-voltage circuit where the fuse 300 is located is too high, the circuit in the conductive bar 1 exceeds a predetermined threshold, and the fixed magnetic yoke 31 and the floating magnetic yoke 32 of the electromagnetic switch 100, which serve as electrical contacts, come into contact with each other, causing the electromagnetic switch 100 to turn on. Accordingly, the passive triggering circuit 400 is turned on. This causes the propellant section 84 to deflagrate. The pressure generated by the deflagration pushes the piston, which acts as the actuation mechanism 83, downward to impact the weak point 14 of the conductor 1, causing the weak point 14 to disconnect. This causes the fuse 300 to disconnect and breaks the high-voltage circuit in which it is located.

[0132] The integrated contactor 200 and fuse 300 disclosed herein, as described above, also have the same advantages as those described above, namely, a simpler structure and faster response time, due to the integration of the actuator system with the electromagnetic switch 100 of this disclosure as described above.

[0133] Although this disclosure has been described with reference to exemplary embodiments, those skilled in the art will understand that various modifications and variations can be made to the exemplary embodiments of this disclosure without departing from the spirit and scope thereof. Therefore, all modifications and variations are included within the scope of protection of this disclosure as defined by the appended claims. The scope of protection of this disclosure is defined by the appended claims, and equivalents of those claims are also included.

Claims

1. An electromagnetic switch, comprising a fixed magnetic yoke and a floating magnetic yoke disposed opposite to each other, characterized in that, The electromagnetic switch also includes: A conductive bus, at least a portion of which passes between a fixed yoke and a floating yoke; An insulator surrounds at least a portion of the conductive bus such that the conductive bus is electrically insulated from the fixed yoke and from the floating yoke. At least one elastic element, said elastic element being configured to apply a force to the floating yoke in a direction that moves the floating yoke away from the fixed yoke; and At least one positioning element includes a body and a stop portion, the body extending through the floating yoke and the elastic member, and extending into or through the insulator, the stop portion being configured to restrict movement of the floating yoke in a direction away from the fixed yoke, the fixed yoke, the insulator, and the positioning element being fixed together relative to each other, and The fixed yoke and the floating yoke are configured as electrical contacts of the electromagnetic switch, and are configured such that when the current through the busbar exceeds a predetermined threshold, the floating yoke overcomes the force of the elastic element and moves toward the fixed yoke to contact the fixed yoke, thereby turning on the electromagnetic switch; when the current through the busbar does not exceed the predetermined threshold, the floating yoke and the fixed yoke remain separated and electrically insulated from each other, thereby keeping the electromagnetic switch off.

2. The electromagnetic switch according to claim 1, characterized in that, The insulator has a first surface facing a fixed yoke and a second surface facing a floating yoke, the fixed yoke abutting against the first surface of the insulator, and the body of the positioning member extends through the insulator and the fixed yoke to fix the insulator, the fixed yoke and the positioning member together with each other.

3. The electromagnetic switch according to claim 1, characterized in that, The fixed magnetic yoke and the insulator are integrally formed by injection molding.

4. The electromagnetic switch according to claim 3, characterized in that, The body of the positioning element and the insulator are integrally formed by injection molding.

5. The electromagnetic switch according to claim 1, characterized in that, The positioning element further includes at least one sleeve with a through hole, the sleeve extending through the floating yoke and the elastic element, the body of the positioning element passing through the through hole of the sleeve, one end of the sleeve abutting against the insulator, and the other end of the sleeve having the stop portion, the body of the positioning element, the sleeve, the fixed yoke, and the insulator being fixed together relative to each other.

6. The electromagnetic switch according to claim 1, characterized in that, The body of the positioning member has a first part and a second part, the outer diameter of the first part is larger than the outer diameter of the second part, the first part extends through the floating yoke and the elastic member and has a first end abutting against the insulator, the second part extends from the first end of the first part through the insulator, and the stop is provided at the second end of the first part opposite to the first end.

7. The electromagnetic switch according to any one of claims 1 to 6, characterized in that, The insulator and the conductive busbar are formed as one piece by injection molding.

8. The electromagnetic switch according to any one of claims 1 to 6, characterized in that, The floating magnetic yoke and the fixed magnetic yoke are directly electrically connected to the conductors.

9. An actuator system, characterized in that, The actuator system includes an actuator, a power supply, and an electromagnetic switch according to any one of claims 1 to 8. The actuator includes an actuation mechanism. The actuator, the electromagnetic switch, and the power supply are connected in series. The actuator is configured such that when the electromagnetic switch is turned on, the actuation mechanism is actuated.

10. The actuator system according to claim 9, characterized in that, The actuator further includes a first connection terminal and a second connection terminal. The first connection terminal is electrically connected to one of the fixed magnetic yoke and the floating magnetic yoke in the electromagnetic switch. The other of the fixed magnetic yoke and the floating magnetic yoke is electrically connected to one end of the power supply. The second connection terminal is electrically connected to the other end of the power supply.

11. The actuator system according to claim 9 or 10, characterized in that, The actuator is a gunpowder-type actuator, which includes a gunpowder section configured to cause deflagration when the electromagnetic switch is turned on, and the pressure generated by the deflagration drives the actuation mechanism to perform an actuation action.

12. An integrated contactor, the integrated contactor comprising a moving contact and a stationary contact, characterized in that, The integrated contactor further includes an actuator system according to any one of claims 9 to 11, wherein the actuation action of the actuation mechanism separates the moving contact and the stationary contact from each other, and one end of the conductive bar of the electromagnetic switch is electrically connected to the stationary contact.

13. A fuse, characterized in that, The fuse includes an actuator system according to any one of claims 9 to 11, wherein the conductive busbar in the actuator system included in the fuse has a weak portion, and the actuation action of the actuation mechanism disconnects the weak portion.

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