relay

Abstract

This application discloses a relay, including a contact cavity, a moving contact assembly, and a fixed magnetic conductive assembly. The contact cavity has a contact chamber; at least a portion of the moving contact assembly is movably disposed within the contact chamber; the fixed magnetic conductive assembly is mounted in the contact cavity and includes an insulating member and a first fixed magnetic conductive member located on the same side as the moving contact assembly. The insulating member is connected to the first fixed magnetic conductive member and isolates the contact cavity from the first fixed magnetic conductive member. The first fixed magnetic conductive member is configured to generate a short-circuit-resistant attractive force based on the magnetic field generated when the moving contact assembly is energized.

Description

Technical Field

[0001] This application relates to the field of electrical control device technology, and more specifically, to a relay. Background Technology

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is commonly used in automatic control circuits. Essentially, a relay is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits.

[0003] High-voltage DC relays, as one type, include a stationary contact assembly and a moving contact assembly. The moving contact assembly is used to make contact with or separate from the stationary contact assembly. To improve the relay's short-circuit withstand capability, relays in related technologies typically also incorporate a short-circuit withstand ring. However, when the moving contact assembly makes contact with the stationary contact assembly, the relay's load current can easily be conducted to the low-voltage circuit through the short-circuit withstand ring, posing a risk of breakdown between the high-voltage and low-voltage circuits. Utility Model Content

[0004] This application provides a relay to improve the problem in related technologies where load current is conducted to the low-voltage circuit through the short-circuit protection ring, thereby causing breakdown of the high-voltage and low-voltage circuits.

[0005] The relay in this application embodiment includes:

[0006] The contact cavity has a contact chamber.

[0007] A movable contact assembly, at least a portion of which is movably disposed within the contact chamber; and

[0008] A fixed magnetic conductive assembly is installed in the contact cavity and includes an insulating member and a first fixed magnetic conductive member located on the same side of the moving contact assembly. The insulating member is connected to the first fixed magnetic conductive member and isolates the contact cavity from the first fixed magnetic conductive member. The first fixed magnetic conductive member is configured to form a short-circuit resistant attraction based on the magnetic field generated when the moving contact assembly is energized.

[0009] According to some embodiments of this application, the insulating member and the first fixed magnetic conductive member are connected by an integral molding process; and / or,

[0010] The first fixed magnetic conductive member has a protrusion, and the insulating member covers the outer surface of the protrusion.

[0011] According to some embodiments of this application, the first fixed magnetic conductive component is used as an insert, and the first fixed magnetic conductive component and the insulating component are connected by an injection molding process.

[0012] According to some embodiments of this application, the contact cavity includes an insulating cover and a yoke plate, the insulating cover being connected to the yoke plate and forming the contact cavity; the insulating cover or the yoke plate is connected to the fixed magnetic conductive assembly; or...

[0013] The contact cavity includes an insulating cover and a yoke plate. The insulating cover is connected to the yoke plate and forms the contact cavity. The insulating cover and the yoke plate are respectively connected to the fixed magnetic conductive assembly.

[0014] According to some embodiments of this application, the fixed magnetic conductive assembly further includes an adapter, which is connected to the insulating member and the first fixed magnetic conductive member. The insulating member isolates the adapter and the first fixed magnetic conductive member, and the adapter is connected to the contact cavity.

[0015] According to some embodiments of this application, the adapter, the insulating member, and the first fixed magnetic conductive member are connected by an integral molding process.

[0016] According to some embodiments of this application, the first fixed magnetic conductive component and the adapter are used as inserts, and the adapter, the insulating component and the first fixed magnetic conductive component are connected by an injection molding process.

[0017] According to some embodiments of this application, the surface of the first fixed magnetic conductor, except for the side facing the moving contact assembly, is covered by the insulating member.

[0018] According to some embodiments of this application, the adapter covers the outer peripheral side of the insulating member.

[0019] According to some embodiments of this application, the first fixed magnetic conductor has a protrusion, the adapter has a stop portion, and the stop portion is located on the side of the protrusion facing the moving contact assembly; and / or,

[0020] The adapter, the insulating component, and the first fixed magnetic conductive component are located on the same side of the moving contact assembly.

[0021] According to some embodiments of this application, the contact cavity includes an insulating cover and a yoke plate, the insulating cover being connected to the yoke plate and forming the contact cavity.

[0022] The adapter is connected to the yoke plate.

[0023] According to some embodiments of this application, the contact cavity includes an insulating cover and a yoke plate, the insulating cover being connected to the yoke plate and forming the contact cavity.

[0024] The adapter is connected to the insulating cover.

[0025] According to some embodiments of this application, the fixed magnetic conductive assembly further includes a connector, the insulating cover has a through connection hole, the connector passes through the connection hole, and fixes the adapter to the insulating cover.

[0026] According to some embodiments of this application, the first fixed magnetic conductive element includes multiple stacked magnetic conductive sheets.

[0027] According to some embodiments of this application, the relay further includes a push rod component and a static contact assembly mounted on the contact cavity. The dynamic contact assembly includes two first dynamic contacts and two second dynamic contacts mounted on the push rod component for contacting or separating from the static contact assembly.

[0028] Two first moving contacts are arranged at intervals along the movement direction of the push rod member, and two second moving contacts are arranged at intervals along the movement direction of the push rod member; the two first moving contacts and the two second moving contacts are arranged in the same layer, and the first moving contacts and the second moving contacts in the two layers constitute the first layer of moving contacts and the second layer of moving contacts, respectively. The fixed magnetic conductive assembly is located on the side of the first layer of moving contacts facing away from the second layer of moving contacts.

[0029] According to some embodiments of this application, the relay further includes a moving component, the moving component including the moving contact component, the moving component being configured to drive the moving contact component to move in response to an input signal, thereby switching the relay between a first state and a second state.

[0030] According to some embodiments of this application, one of the first state and the second state is a relay in a closed state and the other is a relay in an open state.

[0031] According to some embodiments of this application, in one of the first state and the second state, the external circuit controlled by the relay is in series, and in the other state, the external circuit controlled by the relay is in parallel.

[0032] According to some embodiments of this application, the relay further includes four stationary contacts installed in the contact cavity; when the relay is in the first state, two of the four stationary contacts form a first conductive path; when the relay is in the second state, the four stationary contacts form two second conductive paths.

[0033] According to some embodiments of this application, the relay further includes a push rod component, and the four stationary contacts are two first stationary contacts and two second stationary contacts; the moving contact assembly includes a first moving contact assembly and a second moving contact assembly, which are mounted on the push rod component; the fixed magnetic conductive assembly is located on the same side of the first moving contact assembly and the second moving contact assembly;

[0034] When the external circuit controlled by the relay is in series, the two ends of the first moving contact component are in contact with one of the first stationary contacts and one of the second stationary contacts, respectively; the two ends of the second moving contact component are in contact with one of the first stationary contacts and one of the second stationary contacts, respectively; and the first moving contact component and the second moving contact component are both separated from the other first stationary contact and the other second stationary contact.

[0035] When the external circuit controlled by the relay is in parallel, the two ends of the first moving contact component are in contact with the two first stationary contacts respectively, and the two ends of the second moving contact component are in contact with the two second stationary contacts respectively.

[0036] According to some embodiments of this application, the first moving contact assembly includes two first moving contacts, which are arranged at intervals along the movement direction of the push rod member; the second moving contact assembly includes two second moving contacts, which are arranged at intervals along the movement direction of the push rod member; the two first moving contacts and the two second moving contacts are respectively arranged in the same layer, and the first moving contacts and the second moving contacts in the two layers respectively constitute a first layer of moving contacts and a second layer of moving contacts; the fixed magnetic conductive assembly is located on the side of the first layer of moving contacts facing away from the second layer of moving contacts.

[0037] According to some embodiments of this application, when the external circuit controlled by the relay is in a series state, the first moving contact and the second moving contact of the first layer of moving contact are both in contact with one of the first stationary contact and one of the second stationary contact, while the first moving contact and the second moving contact of the second layer of moving contact are both separated from the other first stationary contact and the other second stationary contact.

[0038] When the external circuit controlled by the relay is in parallel, the first moving contact in the second layer of moving contact is in contact with two first stationary contacts, and the second moving contact is in contact with two second stationary contacts, while the first moving contact and the second moving contact in the first layer of moving contact are separated from the first stationary contact and the second stationary contact.

[0039] According to some embodiments of this application, the relay further includes a first movable magnetic conductor connected to the first layer of moving contacts and located on the side of the first layer of moving contacts facing the second layer of moving contacts. The first movable magnetic conductor and the first fixed magnetic conductor are configured to form an anti-short-circuit attraction force based on the magnetic field generated when the first layer of moving contacts is energized.

[0040] According to some embodiments of this application, the relay further includes a second fixed magnetic conductor located in the contact cavity, the second fixed magnetic conductor being fixedly disposed relative to the contact cavity and located on the side of the second moving contact opposite to the first moving contact.

[0041] According to some embodiments of this application, the relay further includes a second movable magnetic conductor connected to the second layer of moving contacts and located on the side of the second layer of moving contacts facing the first layer of moving contacts. The second movable magnetic conductor and the second fixed magnetic conductor are configured to form an anti-short-circuit attraction force based on the magnetic field generated when the second layer of moving contacts is energized.

[0042] According to some embodiments of this application, the first fixed magnetic conductive member includes two sub-magnetic conductive members, and the insulating member is connected to each of the sub-magnetic conductive members and isolates the contact cavity from each of the sub-magnetic conductive members;

[0043] In the direction of movement of the push rod component, the positions of the two sub-magnetic conductors correspond to the positions of the first moving contact assembly and the second moving contact assembly, respectively.

[0044] According to some embodiments of this application, the relay further includes a stationary contact assembly fixedly disposed relative to the contact cavity, and the opposite ends of the moving contact assembly are used to contact or separate from the stationary contact assembly.

[0045] An embodiment of the above application has at least the following advantages or beneficial effects:

[0046] In the relay of this application embodiment, the insulating component isolates the contact cavity and the first fixed magnetic component. The insulating component can achieve better insulation effect, preventing the load current from being conducted to the low-voltage circuit of the relay through the first fixed magnetic component. Furthermore, the insulating component and the first fixed magnetic component are located on the same side of the moving contact assembly. Even if metal vapors are generated when the moving and stationary contacts of the moving and stationary contact assemblies are separated, since the insulating component does not span the moving contact assembly, the risk of metal vapors adhering to the surface of the insulating component is effectively reduced, ensuring the insulation performance of the insulating component.

[0047] Furthermore, the adapter, the insulating component, and the first fixed magnetic conductive component are connected by injection molding. On the one hand, this can improve the connection strength among the three components and ensure the electrical isolation performance of the insulating component; on the other hand, injection molding can significantly improve the connection efficiency and reduce the number of parts assembly steps.

[0048] Furthermore, the first fixed magnetic conductor includes multiple stacked magnetic sheets, which are thinner than the first fixed magnetic conductor, thus reducing material costs.

[0049] Furthermore, the stop portion of the adapter is located on the side of the protrusion facing the moving contact assembly, which can prevent the first fixed magnetic conductor from coming out of the adapter.

[0050] Furthermore, by setting a first fixed magnetic conductor, a first movable magnetic conductor, a second fixed magnetic conductor, and a second movable magnetic conductor, the external circuit controlled by the relay has short-circuit protection in both series and parallel states. Attached Figure Description

[0051] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0052] Figure 1 This is a side view of a relay according to an embodiment of this application.

[0053] Figure 2 It is along Figure 1 A sectional view after being cut along the AA section line.

[0054] Figure 3 This is an exploded view of a relay according to an embodiment of this application.

[0055] Figure 4 This is a three-dimensional schematic diagram of the first and second moving contact components mounted on the push rod component.

[0056] Figure 5 This is a three-dimensional schematic diagram of the fixed magnetic conductive assembly mounted on the yoke plate.

[0057] Figure 6 yes Figure 5 A schematic diagram of its breakdown.

[0058] Figure 7 This is a side view schematic diagram from one perspective after the fixed magnetic conductive component and yoke plate are assembled.

[0059] Figure 8 It is along Figure 7 A sectional view after cutting along the BB section line.

[0060] Figure 9 This is a side view diagram from another perspective after the fixed magnetic conductive component and yoke plate are assembled.

[0061] Figure 10 It is along Figure 9 A sectional view after being cut along the CC section line.

[0062] Figure 11 This is a top view of the assembled magnetic conductive components and the top cover.

[0063] Figure 12 This is a bottom view of the assembled magnetic conductive components and the top cover.

[0064] Figure 13 This is a side view of the assembled magnetic conductive components and the top cover.

[0065] Figure 14 It is along Figure 13 A sectional view after cutting along the DD section line.

[0066] Figure 15 yes Figure 13 A schematic diagram of its breakdown. Detailed Implementation

[0067] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0068] It is understood that the terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0069] like Figure 1 and Figure 2As shown, the relay of this embodiment includes a housing 10, a contact cavity 20, a stationary contact assembly 30, a moving assembly 40, and a magnetic drive portion 50. The contact cavity 20, stationary contact assembly 30, moving assembly 40, and magnetic drive portion 50 are located within the housing 10. The stationary contact assembly 30 is mounted in the contact cavity 20, and a portion of the stationary contact assembly 30 is located within the contact chamber 24 enclosed by the contact cavity 20. The moving assembly 40 is movable relative to the contact cavity 20 for contacting or separating from the stationary contact assembly 30. The magnetic drive portion 50 is configured to drive the moving assembly 40 in response to an input signal, thereby switching the relay between a first state and a second state.

[0070] In this context, "contact" in the term "contact or separation" includes direct or indirect contact, where current can pass through the two components; "separation" in the term "contact or separation" refers to the separation of the two components, where current cannot pass through the two components.

[0071] In one embodiment, in the first state and the second state, the external circuit controlled by the relay is in series, and in the other state, the external circuit controlled by the relay is in parallel.

[0072] In other embodiments, one of the first state and the second state is that the relay is in a closed state and the other is that the relay is in an open state.

[0073] In another embodiment, the relay is in a first state, with the moving component 40 in contact with a portion of the stationary contact component 30; when the relay is in a second state, the moving component 40 is in contact with another portion of the stationary contact component 30.

[0074] The following explanation will be based on the example where the external circuit controlled by the relay is in series in the first state and in parallel in the second state.

[0075] As an example, such as Figure 1 and Figure 2 As shown, the outer shell 10 may include a first shell 11 and a second shell 12, which are connected to form a cavity for accommodating the contact cavity 20, the static contact assembly 30, the moving assembly 40, and the magnetic drive portion 50. The shape of the first shell 11 and the second shell 12 connected together can be a cuboid, a cylinder, etc. In the embodiment of this application, the first shell 11 and the second shell 12 are connected to form a hollow cuboid, but this is not a limitation.

[0076] In one embodiment, both the first shell 11 and the second shell 12 are rectangular parallelepipeds and each has an opening on one side. The opening of the first shell 11 is opposite to the opening of the second shell 12, and the first shell 11 and the second shell 12 are fastened together to form a cavity.

[0077] Of course, in other embodiments, the first shell 11 can be a flat plate structure, and the second shell 12 can be a cuboid shape with an opening, forming a cavity after the first shell 11 and the second shell 12 are fastened together.

[0078] like Figure 2 and Figure 3 As shown, the contact cavity 20 includes an insulating cover 20a and a yoke plate 23. The insulating cover 20a is connected to one side surface of the yoke plate 23 in the thickness direction, and the insulating cover 20a and the yoke plate 23 form a contact cavity 24. The static contact assembly 30 is mounted on the insulating cover 20a.

[0079] In one embodiment, the insulating cover 20a may include a top 21 and a wall 22. The wall 22 is a cylindrical structure with openings at both ends. The top 21 closes one opening of the wall 22, and the yoke plate 23 closes the other opening of the wall 22. The top 21, the wall 22, and the yoke plate 23 together form a contact chamber 24. The static contact assembly 30 is mounted on the top 21.

[0080] It is understood that the closed ring formed by the cylindrical structure can be circular, polygonal, elliptical, etc., and this application does not limit it.

[0081] In one embodiment, the dome 21 is generally flat and parallel to the yoke plate 23, but this is not a limitation. For example, in other embodiments, the dome 21 may also be L-shaped.

[0082] As an example, the canopy 21 includes a top plate 211 and a frame plate 212, which are connected to the top plate 211 and the canopy wall 22 respectively. The static contact assembly 30 is installed on the top plate 211. The frame plate 212 is a metal part with a ring structure, for example, the frame plate 212 can be made of iron-nickel alloy.

[0083] The yoke plate 23 has a through hole 231 that extends through the yoke plate 23 along its thickness direction. The moving component 40 is movably disposed within the through hole 231, and a portion of the moving component 40 is located within the contact chamber 24.

[0084] like Figure 2 and Figure 3 As shown, the moving component 40 includes a push rod member 41 and a moving contact component 42. At least a portion of the moving contact component 42 is located within the contact chamber 24 and is mounted on the push rod member 41. The push rod member 41 is movably inserted through the through hole 231 and is used to drive the moving contact component 42 to move, so that the moving contact component 42 contacts or separates from the stationary contact component 30. In this embodiment, all of the moving contact components 42 are located within the contact chamber 24.

[0085] The magnetic drive part 50 is located on the side of the yoke plate 23 facing away from the static contact assembly 30 and is connected to the push rod member 41 for driving the push rod member 41 to move.

[0086] It is understood that the magnetic drive part 50 can be a magnetic holding structure or a non-magnetic holding structure, and this application does not limit it in this regard.

[0087] like Figure 3 As shown, the static contact assembly 30 includes four static contacts. When the relay is in the first state, two of the four static contacts form a first conductive path; when the relay is in the second state, the four static contacts form two second conductive paths.

[0088] In one embodiment, the four stationary contacts are two first stationary contacts 33 and two second stationary contacts 34, and both the two first stationary contacts 33 and the two second stationary contacts 34 are mounted on the top cover 21.

[0089] In one embodiment, each first stationary contact 33 includes a first lead-out 311. The first leads-out 311 of two first stationary contacts 33 are mounted on the top cover 21 and arranged at intervals along the first direction D1. One of the two first stationary contacts 33 further includes a first conductive element 32a, which is connected to one of the first leads-out 311. Each second stationary contact 34 includes a second lead-out 312. The second leads-out 312 of two second stationary contacts 34 are mounted on the top cover 21 and arranged at intervals along the first direction D1. One of the two second stationary contacts 34 further includes a second conductive element 32b, which is connected to one of the second leads-out 312.

[0090] In one embodiment, the first conductive element 32a and the second conductive element 32b are generally C-shaped, but not limited thereto.

[0091] For ease of explanation, the direction of motion of the push rod component 41 is defined as the second direction D2 and the third direction D3. The first direction D1, the second direction D2 and the third direction D3 are mutually perpendicular.

[0092] In the embodiments of this application, along the third direction D3, the positions of the two first leads 311 correspond to the positions of the two second leads 312 respectively.

[0093] In one embodiment, the two first leads 311 and the two second leads 312 form a rectangle. Further, the two first leads 311 and the two second leads 312 form a square.

[0094] Of course, in other embodiments, the positions of the two first leads 311 along the third direction D3 may not correspond to the positions of the two second leads 312.

[0095] In one embodiment, the first conductive element 32a and the second conductive element 32b are arranged in a centrally symmetrical manner, but this is not a limitation.

[0096] like Figure 3 and Figure 4 As shown, the moving contact assembly 42 includes a first moving contact assembly 42a and a second moving contact assembly 42b. The first moving contact assembly 42a and the second moving contact assembly 42b are mounted on the push rod member 41 and arranged side by side along the third direction D3.

[0097] When the external circuit controlled by the relay is in series, the two opposite ends of the first moving contact component 42a are in contact with one of the first stationary contacts 33 and one of the second stationary contacts 34, respectively, and the two opposite ends of the second moving contact component 42b are in contact with one of the first stationary contacts 33 and one of the second stationary contacts 34, respectively, while the first moving contact component 42a and the second moving contact component 42b are both separated from the other first stationary contact 33 and the other second stationary contact 34; when the external circuit controlled by the relay is in parallel, the two opposite ends of the first moving contact component 42a are in contact with two of the first stationary contacts 33, respectively, and the two opposite ends of the second moving contact component 42b are in contact with two of the second stationary contacts 34, respectively.

[0098] In the embodiments of this application, when the external circuit controlled by the relay is in a series connection, the two ends of the first moving contact component 42a along the first direction D1 are in contact with the first conductive element 32a and the second conductive element 32b, respectively, and the two ends of the second moving contact component 42b along the first direction D1 are in contact with the first conductive element 32a and the second conductive element 32b, respectively. When the external circuit controlled by the relay is in a parallel connection, the two ends of the first moving contact component 42a along the first direction D1 are in contact with one of the first leads 311 and the first conductive element 32a, respectively, and the two ends of the second moving contact component 42b are in contact with one of the second leads 312 and the second conductive element 32b, respectively.

[0099] Please continue reading. Figure 3 and Figure 4The first movable contact assembly 42a includes two first movable contact elements 421, which are arranged at intervals along the movement direction (second direction D2) of the push rod member 41. The second movable contact assembly 42b includes two second movable contact elements 422, which are also arranged at intervals along the movement direction (second direction D2) of the push rod member 41. The two first movable contact elements 421 and the two second movable contact elements 422 are arranged in the same layer, and the first movable contact elements 421 and the second movable contact elements 422 in the two layers respectively constitute the first layer movable contact element 423 and the second layer movable contact element 424.

[0100] When the external circuit controlled by the relay is in series, the two ends of the first moving contact 421 of the first moving contact 423 are in contact with the first conductive element 32a and the second conductive element 32b respectively, and the two ends of the second moving contact 422 of the first moving contact 423 are in contact with the first conductive element 32a and the second conductive element 32b respectively. Meanwhile, the first moving contact 421 and the second moving contact 422 in the second moving contact 424 are separated from the other first stationary contact 33 and the other second stationary contact 34.

[0101] When the external circuit controlled by the relay is in parallel, the first moving contact 421 in the second layer of moving contact 424 is in contact with the two first stationary contacts 33 respectively, and the second moving contact 422 is in contact with the two second stationary contacts 34 respectively, while the first moving contact 421 and the second moving contact 422 in the first layer of moving contact 423 are both separated from the first stationary contacts 33 and the second stationary contacts 34.

[0102] In this embodiment of the application, the moving contact component 42 adopts a double-layer moving contact structure, which, together with the fixed magnetic component 60 described above, enables the relay to have the effect of short circuit protection when it is in different states.

[0103] It should be noted that "the fixed magnetic conductive assembly 60 is located on the side of the first layer moving contact 423 facing away from the second layer moving contact 424" should be understood as follows: if the fixed magnetic conductive assembly 60 is fixedly connected to the yoke plate 23, then the lower one is the first layer moving contact 423 and the upper one is the second layer moving contact 424; if the fixed magnetic conductive assembly 60 is fixedly connected to the top plate 211 of the insulating cover 20a, then the upper one is the first layer moving contact 423 and the lower one is the second layer moving contact 424.

[0104] In one embodiment, the first movable contact 421 may include one or more first movable contact pieces 425. When the first movable contact 421 includes multiple first movable contact pieces 425, the multiple first movable contact pieces 425 are arranged side by side along the third direction D3. The second movable contact 422 may include one or more second movable contact pieces 426. When the second movable contact 422 includes multiple second movable contact pieces 426, the multiple second movable contact pieces 426 are arranged side by side along the third direction D3.

[0105] like Figure 3 and Figure 5 As shown, the relay also includes a fixed magnetic conductive assembly 60, which is installed in the contact cavity 20 and includes an insulating member 61 and a first fixed magnetic conductive member 62 located on the same side as the moving contact assembly 42. The insulating member 61 is connected to the first fixed magnetic conductive member 62 and isolates the contact cavity 20 from the first fixed magnetic conductive member 62. The first fixed magnetic conductive member 62 is configured to form a short-circuit-resistant attraction based on the magnetic field generated when the moving contact assembly 42 is energized.

[0106] In the relay of this application embodiment, the insulating member 61 isolates the contact cavity 20 and the first fixed magnetic conductor 62. The insulating member 61 can achieve better insulation effect, preventing the load current from being conducted to the low-voltage circuit of the relay through the first fixed magnetic conductor 62. Furthermore, the insulating member 61 and the first fixed magnetic conductor 62 are located on the same side of the moving contact assembly 42. Even if metal vapors are generated when the moving contact assembly 42 separates from the moving and stationary contacts of the stationary contact assembly 30, since the insulating member 61 does not span the moving contact assembly 42, the risk of metal vapors adhering to the surface of the insulating member 61 is effectively reduced, ensuring the insulation performance of the insulating member 61.

[0107] The term "isolation" refers to using the insulating properties of the insulating element 61 to prevent current from flowing between the contact cavity 20 and the first fixed magnetic conductive element 62.

[0108] like Figure 3 As shown, the fixed magnetic conductive assembly 60 is located on the same side of the first moving contact assembly 42a and the second moving contact assembly 42b. Further, the fixed magnetic conductive assembly 60 is located on the side of the first layer moving contact 423 facing away from the second layer moving contact 424.

[0109] like Figure 5 As shown, the fixed magnetic conductive assembly 60 is connected to the yoke plate 23. This application does not impose any particular limitation on the connection method between the fixed magnetic conductive assembly 60 and the yoke plate 23, such as riveting, welding, gluing, etc.

[0110] like Figure 5 and Figure 6As shown, the fixed magnetic conductive assembly 60 also includes an adapter 63, which is connected to the insulator 61 and the first fixed magnetic conductive component 62. The insulator 61 isolates the adapter 63 and the first fixed magnetic conductive component 62. The adapter 63 is connected to the contact cavity 20. The adapter 63, the insulator 61, and the first fixed magnetic conductive component 62 are located on the same side of the moving contact assembly 42.

[0111] In one embodiment, the adapter 63 may be made of a metallic material, but is not limited thereto.

[0112] In other embodiments, the fixed magnetic component 60 may also exclude the adapter 63, and instead the insulating component 61 may be directly connected to the contact cavity 20.

[0113] In one embodiment, the adapter 63, the insulating member 61, and the first fixed magnetic conductive member 62 are connected by an integral molding process.

[0114] Furthermore, the first fixed magnetic conductive component 62 and the adapter 63 are used as inserts, and the adapter 63, the insulating component 61 and the first fixed magnetic conductive component 62 are connected by injection molding process.

[0115] In the embodiments of this application, the adapter 63, the insulating part 61 and the first fixed magnetic conductive part 62 are connected by injection molding. On the one hand, this can improve the connection strength among the adapter 63, the insulating part 61 and the first fixed magnetic conductive part 62, and ensure the electrical isolation performance of the insulating part 61. On the other hand, injection molding can significantly improve the connection efficiency and reduce the number of parts assembly steps.

[0116] like Figure 5 and Figure 6 As shown, the first fixed magnetic conductor 62 includes two sub-magnetic conductors 623, and the insulating member 61 is connected to each sub-magnetic conductor 623 and isolates the contact cavity 20 from each sub-magnetic conductor 623; in the direction of movement of the push rod member 41 (second direction D2), the positions of the two sub-magnetic conductors 623 correspond to the positions of the first moving contact assembly 42a and the second moving contact assembly 42b, respectively.

[0117] In one embodiment, each sub-magnetic element 623 includes multiple stacked magnetic sheets 622. These magnetic sheets 622 can be stacked along a third direction D3, a first direction D1, or a second direction D2.

[0118] In this embodiment of the application, the first fixed magnetic conductive member 62 includes multiple stacked magnetic conductive sheets 622. The thickness of the magnetic conductive sheets 622 is thinner than that of the first fixed magnetic conductive member 62, which is more conducive to reducing material costs.

[0119] like Figure 7 and Figure 8As shown, except for the surface of the first fixed magnetic conductor 62 facing the moving contact assembly 42, the rest of its surface is covered by the insulating member 61. The adapter 63 covers the outer peripheral side of the insulating member 61.

[0120] like Figure 9 and Figure 10 As shown, the first fixed magnetic conductor 62 has a protrusion 621, and the insulating member 61 covers the outer surface of the protrusion 621.

[0121] In the embodiments of this application, the first fixed magnetic conductive member 62 is provided with a protrusion 621. The protrusion 621 increases the area of ​​the overall outer surface of the first fixed magnetic conductive member 62, thereby improving the firmness of the connection between the insulating member 61 and the first fixed magnetic conductive member 62, and preventing the first fixed magnetic conductive member 62 from separating from the insulating member 61 under a large short-circuit current, thus affecting the short-circuit protection effect.

[0122] Furthermore, the adapter 63 has a stop portion 631, which is located on the side of the protrusion 621 facing the moving contact assembly 42.

[0123] In this embodiment of the application, the stop portion 631 of the adapter 63 is located on the side of the protrusion 621 facing the moving contact assembly 42, which can prevent the first fixed magnetic conductor 62 from coming out of the adapter 63.

[0124] In this embodiment of the application, the first fixed magnetic conductive member 62 has protrusions 621 on both sides along the first direction D1. Of course, in other embodiments, the first fixed magnetic conductive member 62 may also have protrusions 621 on both sides along the third direction D3.

[0125] When the first fixed magnetic conductive member 62 includes multiple stacked magnetic conductive sheets 622, each magnetic conductive sheet 622 may have a small protrusion on its side. When multiple magnetic conductive sheets 622 are stacked, multiple small protrusions on the same side constitute a protrusion 621.

[0126] Please return to the reference. Figure 2 and Figure 4 The relay also includes a first movable magnetic conductor 65, which is connected to the first layer of moving contact 423 and located on the side of the first layer of moving contact 423 facing the second layer of moving contact 424. The first movable magnetic conductor 65 and the first fixed magnetic conductor 62 are configured to form a short-circuit-resistant attraction based on the magnetic field generated when the first layer of moving contact 423 is energized.

[0127] In this embodiment, when the first moving contact 423 contacts the first conductive element 32a and the second conductive element 32b, the first movable magnetic element 65, which moves together with the first moving contact 423, approaches or contacts the first fixed magnetic element 62, thereby forming a magnetic circuit between the first fixed magnetic element 62 and the first movable magnetic element 65. When a short-circuit current passes through the first moving contact 423, an attractive force is generated between the first fixed magnetic element 62 and the first movable magnetic element 65 along the contact pressure direction. This attractive force can resist the electrodynamic repulsive force generated between the first moving contact 423 and the first conductive element 32a and the second conductive element 32b due to the short-circuit current, preventing the first moving contact 423 from instantly popping away.

[0128] like Figure 2 and Figure 3 As shown, the relay also includes a second fixed magnetic conductor 66 located in the contact chamber 24. The second fixed magnetic conductor 66 is fixedly disposed relative to the contact chamber 20 and is located on the side of the second layer moving contact 424 facing away from the first layer moving contact 423.

[0129] In one embodiment, the relay further includes a second movable magnetic conductor 67 connected to the second layer moving contact 424 and located on the side of the second layer moving contact 424 facing the first layer moving contact 423. The second movable magnetic conductor 67 and the second fixed magnetic conductor 66 are configured to form a short-circuit-resistant attraction based on the magnetic field generated when the second layer moving contact 424 is energized.

[0130] In this embodiment, when the second moving contact 424 contacts the two first stationary contacts 33 and the two second stationary contacts 34, the second movable magnetic conductor 67, which moves together with the second moving contact 424, approaches or contacts the second fixed magnetic conductor 66, thereby forming a magnetic circuit between the second fixed magnetic conductor 66 and the second movable magnetic conductor 67. When a short-circuit current passes through the second moving contact 424, an attractive force is generated between the second fixed magnetic conductor 66 and the second movable magnetic conductor 67 along the contact pressure direction. This attractive force can resist the electrodynamic repulsive force generated between the second moving contact 424 and the first stationary contacts 33 and the second stationary contacts 34 due to the short-circuit current, preventing the second moving contact 424 from instantly springing away.

[0131] Therefore, by setting the first fixed magnetic conductor 62, the first movable magnetic conductor 65, the second fixed magnetic conductor 66, and the second movable magnetic conductor 67, the external circuit controlled by the relay has short-circuit protection in both series and parallel states.

[0132] In one embodiment, the first fixed magnetic conductor 62, the first movable magnetic conductor 65, the second fixed magnetic conductor 66, and the second movable magnetic conductor 67 are made of magnetic materials such as iron, cobalt, nickel, and their alloys.

[0133] In one embodiment, the first fixed magnetic conductor 62, the first movable magnetic conductor 65, the second fixed magnetic conductor 66, and the second movable magnetic conductor 67 can be in the shape of a line, a U-shape, an L-shape, or an E-shape, etc.

[0134] It should be noted that the fixed magnetic conductive component 60 is not limited to being connected to the yoke plate 23. As a modified embodiment, the fixed magnetic conductive component 60 can also be connected to the insulating cover 20a.

[0135] like Figures 11 to 15 As shown, the fixed magnetic conductive assembly 60 is connected to the top plate 211 of the insulating cover 20a. The similarities between the fixed magnetic conductive assembly 60 of this embodiment and the fixed magnetic conductive assembly 60 of the above embodiments will not be repeated, but the differences are as follows:

[0136] The fixed magnetic conductive assembly 60 also includes a connector 64. The top plate 211 of the insulating cover 20a has a through connection hole 25. The connector 64 passes through the connection hole 25 and fixes the adapter 63 to the insulating cover 20a. The connection method between the connector 64 and the top plate 211 includes, but is not limited to, welding and riveting.

[0137] It is understood that the number of fixed magnetic conductive components 60 can be one or more. When the number of fixed magnetic conductive components 60 is one, the fixed magnetic conductive component 60 can be connected to the top plate 211 of the yoke plate 23 or the insulating cover 20a. When the number of fixed magnetic conductive components 60 is multiple, the yoke plate 23 is connected to at least one fixed magnetic conductive component 60, and the top plate 211 of the insulating cover 20a is connected to at least one fixed magnetic conductive component 60.

[0138] In summary, the relays of the embodiments of this application have at least the following advantages and beneficial effects:

[0139] In the relay of this application embodiment, the insulating member 61 isolates the contact cavity 20 and the first fixed magnetic conductor 62. The insulating member 61 can achieve better insulation effect, preventing the load current from being conducted to the low-voltage circuit of the relay through the first fixed magnetic conductor 62. Furthermore, the insulating member 61 and the first fixed magnetic conductor 62 are located on the same side of the moving contact assembly. Even if metal vapors are generated when the moving contact assembly and the moving and stationary contacts of the stationary contact assembly 30 are separated, since the insulating member 61 does not span the moving contact assembly, the risk of metal vapors adhering to the surface of the insulating member 61 is effectively reduced, ensuring the insulation performance of the insulating member 61.

[0140] Furthermore, the adapter 63, the insulating part 61, and the first fixed magnetic conductive part 62 are connected by injection molding. On the one hand, this can improve the connection strength among the adapter 63, the insulating part 61, and the first fixed magnetic conductive part 62, and ensure the electrical isolation performance of the insulating part 61. On the other hand, injection molding can significantly improve the connection efficiency and reduce the number of parts assembly steps.

[0141] Furthermore, the first fixed magnetic conductive element 62 includes multiple stacked magnetic conductive sheets 622. The thickness of the magnetic conductive sheets 622 is thinner than that of the first fixed magnetic conductive element 62, which is more conducive to reducing material costs.

[0142] Furthermore, the stop portion 631 of the adapter 63 is located on the side of the protrusion 621 facing the moving contact assembly, which can prevent the first fixed magnetic conductor 62 from coming out of the adapter 63.

[0143] Furthermore, by setting the first fixed magnetic conductor 62, the first movable magnetic conductor 65, the second fixed magnetic conductor 66, and the second movable magnetic conductor 67, the external circuit controlled by the relay has short-circuit protection in both series and parallel states.

[0144] It is understood that the various embodiments / implementations provided in this application can be combined with each other without creating contradictions, and will not be described one by one here.

[0145] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0146] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the application.

[0147] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the claims. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0148] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. A relay, characterized in that, include: The contact cavity has a contact chamber. A movable contact assembly, at least a portion of which is movably disposed within the contact chamber; as well as A fixed magnetic conductive assembly is installed in the contact cavity and includes an insulating member and a first fixed magnetic conductive member located on the same side of the moving contact assembly. The insulating member is connected to the first fixed magnetic conductive member and isolates the contact cavity from the first fixed magnetic conductive member. The first fixed magnetic conductive member is configured to form a short-circuit resistant attraction based on the magnetic field generated when the moving contact assembly is energized.

2. The relay according to claim 1, characterized in that, The insulating component is connected to the first fixed magnetic conductive component via an integral molding process; and / or The first fixed magnetic conductive member has a protrusion, and the insulating member covers the outer surface of the protrusion.

3. The relay according to claim 2, characterized in that, The first fixed magnetic conductive component is used as an insert, and the first fixed magnetic conductive component and the insulating component are connected by injection molding process.

4. The relay according to claim 1, characterized in that, The contact cavity includes an insulating cover and a yoke plate, the insulating cover being connected to the yoke plate and forming the contact cavity; the insulating cover or the yoke plate is connected to the fixed magnetic conductive assembly; or... The contact cavity includes an insulating cover and a yoke plate. The insulating cover is connected to the yoke plate and forms the contact cavity. The insulating cover and the yoke plate are respectively connected to the fixed magnetic conductive assembly.

5. The relay according to claim 1, characterized in that, The fixed magnetic conductive assembly further includes an adapter, which is connected to the insulating component and the first fixed magnetic conductive component. The insulating component isolates the adapter and the first fixed magnetic conductive component. The adapter is connected to the contact cavity.

6. The relay according to claim 5, characterized in that, The adapter, the insulating component, and the first fixed magnetic conductive component are connected by an integral molding process.

7. The relay according to claim 6, characterized in that, The first fixed magnetic conductive component and the adapter are used as inserts, and the adapter, the insulating component and the first fixed magnetic conductive component are connected by injection molding process.

8. The relay according to claim 5, characterized in that, Except for the side facing the moving contact assembly, the remaining surfaces of the first fixed magnetic conductive member are covered by the insulating member.

9. The relay according to claim 8, characterized in that, The adapter covers the outer peripheral side of the insulating component.

10. The relay according to claim 5, characterized in that, The first fixed magnetic conductor has a protrusion, and the adapter has a stop portion located on the side of the protrusion facing the moving contact assembly; and / or, The adapter, the insulating component, and the first fixed magnetic conductive component are located on the same side of the moving contact assembly.

11. The relay according to claim 5, characterized in that, The contact cavity includes an insulating cover and a yoke plate, the insulating cover being connected to the yoke plate and forming the contact cavity. The adapter is connected to the yoke plate.

12. The relay according to claim 5, characterized in that, The contact cavity includes an insulating cover and a yoke plate, the insulating cover being connected to the yoke plate and forming the contact cavity. The adapter is connected to the insulating cover.

13. The relay according to claim 12, characterized in that, The fixed magnetic conductive assembly also includes a connector. The insulating cover has a through connection hole. The connector passes through the connection hole and fixes the adapter to the insulating cover.

14. The relay according to claim 1, characterized in that, The first fixed magnetic conductive element includes multiple stacked magnetic conductive sheets.

15. The relay according to any one of claims 1-14, characterized in that, The relay also includes a push rod component and a static contact assembly mounted on the contact cavity. The dynamic contact assembly includes two first dynamic contacts and two second dynamic contacts mounted on the push rod component for contacting or separating from the static contact assembly. Two first moving contact members are arranged at intervals along the movement direction of the push rod member, and two second moving contact members are arranged at intervals along the movement direction of the push rod member; The two first moving contacts are arranged in the same layer as the two second moving contacts. The first moving contacts and the second moving contacts in the two layers constitute the first layer of moving contacts and the second layer of moving contacts, respectively. The fixed magnetic conductive assembly is located on the side of the first layer of moving contacts that faces away from the second layer of moving contacts.

16. The relay according to any one of claims 1-14, characterized in that, The relay also includes a moving component, which includes the moving contact component. The moving component is configured to drive the moving contact component to move in response to an input signal, thereby switching the relay between a first state and a second state.

17. The relay according to claim 16, characterized in that, In the first state and the second state, one of them is that the relay is in the closed state, and the other is that the relay is in the open state.

18. The relay according to claim 16, characterized in that, In the first state and the second state, one of the external circuits controlled by the relay is in series, and the other of the external circuits controlled by the relay is in parallel.

19. The relay according to claim 16, characterized in that, The relay further includes four stationary contacts installed in the contact cavity; when the relay is in the first state, two of the four stationary contacts form a first conductive path; when the relay is in the second state, the four stationary contacts form two second conductive paths.

20. The relay according to claim 19, characterized in that, The relay further includes a push rod component, and the four stationary contacts are two first stationary contacts and two second stationary contacts; the moving contact assembly includes a first moving contact assembly and a second moving contact assembly, which are mounted on the push rod component; the fixed magnetic conductive assembly is located on the same side of the first moving contact assembly and the second moving contact assembly; When the external circuit controlled by the relay is in series, the two ends of the first moving contact component are in contact with one of the first stationary contacts and one of the second stationary contacts, respectively; the two ends of the second moving contact component are in contact with one of the first stationary contacts and one of the second stationary contacts, respectively; and the first moving contact component and the second moving contact component are both separated from the other first stationary contact and the other second stationary contact. When the external circuit controlled by the relay is in parallel, the two ends of the first moving contact component are in contact with the two first stationary contacts respectively, and the two ends of the second moving contact component are in contact with the two second stationary contacts respectively.

21. The relay according to claim 20, characterized in that, The first moving contact assembly includes two first moving contacts, which are arranged at intervals along the movement direction of the push rod member. The second moving contact assembly includes two second moving contacts, which are also arranged at intervals along the movement direction of the push rod member. The two first moving contacts and the two second moving contacts are arranged in the same layer. The first moving contacts and the second moving contacts in the two layers constitute the first layer of moving contacts and the second layer of moving contacts, respectively. The fixed magnetic conductive assembly is located on the side of the first layer of moving contacts that faces away from the second layer of moving contacts.

22. The relay according to claim 21, characterized in that, When the external circuit controlled by the relay is in series, the first moving contact and the second moving contact of the first layer of moving contact are in contact with one of the first stationary contact and one of the second stationary contact, while the first moving contact and the second moving contact of the second layer of moving contact are separated from the other first stationary contact and the other second stationary contact. When the external circuit controlled by the relay is in parallel, the first moving contact in the second layer of moving contact is in contact with two first stationary contacts, and the second moving contact is in contact with two second stationary contacts, while the first moving contact and the second moving contact in the first layer of moving contact are separated from the first stationary contact and the second stationary contact.

23. The relay according to claim 21, characterized in that, The relay further includes a first movable magnetic conductor, which is connected to the first layer of moving contacts and located on the side of the first layer of moving contacts facing the second layer of moving contacts. The first movable magnetic conductor and the first fixed magnetic conductor are configured to form an anti-short-circuit attraction based on the magnetic field generated when the first layer of moving contacts is energized.

24. The relay according to claim 21, characterized in that, The relay further includes a second fixed magnetic conductor located within the contact cavity. The second fixed magnetic conductor is fixedly disposed relative to the contact cavity and is located on the side of the second moving contact that faces away from the first moving contact.

25. The relay according to claim 24, characterized in that, The relay further includes a second movable magnetic conductor connected to the second layer of moving contact and located on the side of the second layer of moving contact facing the first layer of moving contact. The second movable magnetic conductor and the second fixed magnetic conductor are configured to form a short-circuit-resistant attraction based on the magnetic field generated when the second layer of moving contact is energized.

26. The relay according to claim 20, characterized in that, The first fixed magnetic conductive element includes two sub-magnetic conductive elements, and the insulating element is connected to each of the sub-magnetic conductive elements and isolates the contact cavity from each of the sub-magnetic conductive elements; In the direction of movement of the push rod component, the positions of the two sub-magnetic conductors correspond to the positions of the first moving contact assembly and the second moving contact assembly, respectively.

27. The relay according to any one of claims 1-14, characterized in that, The relay also includes a stationary contact assembly, which is fixedly disposed relative to the contact cavity, and the opposite ends of the moving contact assembly are used to contact or separate from the stationary contact assembly.

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