A sealed balanced rotary magnetic latching relay

Abstract

This application relates to a sealed balanced rotary magnetic latching relay, belonging to the field of relays. It includes a housing and a relay body. The relay body has a contact portion and a magnetic circuit portion. The magnetic circuit portion includes an electromagnet, a magnetically conductive portion, and an armature portion. The magnetically conductive portion includes a magnetic conductor and a magnet. In the de-energized state, the magnet forms a holding magnetic circuit through the magnetic conductor, pole shoes, and armature, stably holding the armature in the reset or set position. When the coil is energized, an operating magnetic circuit is formed, driving the armature to switch between the reset and set positions, and causing the moving and stationary connecting parts to change their conduction state. This application can achieve power-off retention, reduce energy consumption and heat generation, and improve operational stability and reliability.

Description

Technical Field

[0001] This application relates to the field of relay technology, and in particular to a sealed balanced rotary magnetic latching relay. Background Technology

[0002] Relays are widely used in automatic control, power electronics, and communication equipment. They use an electromagnetic system to drive a contact system to connect or disconnect circuits. As products evolve towards lower power consumption and higher reliability, relays not only need to have good switching performance but also need to stably maintain the corresponding operating state after the action is completed.

[0003] Existing technologies include relays employing a rotary magnetic circuit structure. The armature rotates, driving a pusher to actuate and deforming a moving spring, thus switching between moving and stationary contacts. While this approach achieves basic contact switching, it lacks stability in maintaining the relay's position and initial state after power loss. After the relay completes its action, if the coil is de-energized, the stability of the contact state is easily affected, potentially leading to unstable operation, especially under vibration or shock conditions.

[0004] Furthermore, in existing technologies, to improve the stability of relays in the set and initial states, it is often necessary to rely on coil excitation to maintain the corresponding states. This not only increases the energizing burden on the coil and the overall energy consumption, but also easily leads to increased coil heating, affecting the consistency of relay operating parameters and long-term operational reliability.

[0005] Therefore, how to provide a technical solution that can maintain the relay in the set state and initial state when the coil is not continuously energized, so as to reduce energy consumption and heat generation and improve the reliability of relay state maintenance, has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] In view of the poor stability of relays in the set and initial states when power is off, and the fact that coil excitation is often required to maintain the stability of the state, resulting in high energy consumption, large heat generation and affecting the reliability of operation, this application proposes a sealed balanced rotary magnetic latching relay.

[0007] The sealed balanced rotary magnetic latching relay provided in this application adopts the following technical solution: A sealed, balanced, rotary magnetic latching relay includes a housing and a relay body. The relay body has a contact portion and a magnetic circuit portion. The contact portion includes a moving connector and a stationary connector. The magnetic circuit portion includes an electromagnet, a magnetically conductive portion, and an armature portion. The armature portion is rotatably connected to the relay body and can rotate about a hinge axis. The armature portion is drively connected to the moving connector to drive the moving connector to move, switching the conduction state between the moving connector and the stationary connector. The electromagnet generates a switching magnetic force to drive the armature portion to rotate when the coil is energized. The magnetically conductive portion includes a magnetically conductive body and a magnet. The magnet is disposed on the magnetically conductive body. When the electromagnet is de-energized, the magnet forms a holding magnetic force on the armature portion through the magnetically conductive body, so that the armature portion is stably held in a set position or a reset position.

[0008] By adopting the above technical solution, the magnet provides holding magnetic force in the power-off state, the coil provides switching magnetic force when energized, and the magnetic conductor guides and distributes the magnetic flux of the magnet, thereby constructing a controllable holding magnetic circuit and an operating magnetic circuit. When the coil is not energized, the magnetic flux generated by the magnet forms a holding magnetic circuit between the magnetic conductor, the pole shoe, and the armature. Stable adsorption and holding are achieved based on the smaller magnetic resistance on the corresponding side of the armature in the reset position. Therefore, the relay does not need to rely on continuous coil energization to maintain its current state, achieving bistable power-off holding, which helps reduce overall energy consumption, reduce coil heating, and improve the reliability of state holding. When the coil is energized, the electromagnetic flux generated by the coil and the original magnetic flux of the magnet act together in the same magnetic circuit network, causing the total magnetic flux distribution of the system to change in a direction favorable to the target side's attraction. This drives the armature to rotate around the hinge axis, causing the moving and stationary connecting bodies to switch conduction states, thus achieving reliable switching of the relay between the set and reset positions. Therefore, this application combines low power consumption, high holding stability, and repeatable switching capability.

[0009] Preferably, the electromagnet includes an iron core, a left pole shoe, a right pole shoe, and a coil assembly. The coil assembly is disposed on the iron core, and the left pole shoe and the right pole shoe are respectively disposed on both sides of the iron core and correspond to the left and right ends of the armature portion, so that the iron core, the left pole shoe, the right pole shoe, and the armature portion form an electromagnetic operating magnetic circuit.

[0010] By adopting the above technical solution, the iron core, left pole shoe, right pole shoe and armature together form a relatively clear operating magnetic circuit, so that the electromagnetic flux formed after the coil is energized can be effectively loaded onto the corresponding areas at both ends of the armature, thereby improving the clarity of the armature switching action and the reliability of the response; at the same time, the left and right pole shoes correspond to the two ends of the armature respectively, which is conducive to forming a net electromagnetic torque to drive the armature to rotate when the coil is energized, so as to improve the operating efficiency and switching stability.

[0011] Preferably, the magnetic conductor is magnetically connected to the left pole shoe and the right pole shoe, and the magnet is disposed on the magnetic conductor so that the magnet forms a holding magnetic circuit through the magnetic conductor, the left pole shoe, the right pole shoe and the armature portion.

[0012] By adopting the above technical solution, the magnetic conductor magnetically connects the left and right pole shoes and provides a low-resistivity magnetic channel for the magnet. This allows the magnetic flux generated by the magnet to be guided and concentratedly distributed to the corresponding areas of the left and right pole shoes and the armature, rather than being randomly dispersed. This improves the armature's ability to maintain its position in both the set and reset positions, and enhances the stability of bistable holding. Simultaneously, the magnetic conductor also makes the holding magnetic circuit more stable and continuous, contributing to improved overall magnetic circuit utilization efficiency.

[0013] Preferably, the coil assembly includes a left coil and a right coil, both of which are wound on the iron core, and the winding directions of the left coil and the right coil are opposite, so that when the left coil and the right coil are energized, they generate magnetic fluxes in opposite directions.

[0014] By employing the above technical solution and utilizing the opposite winding directions of the left and right coils, the left and right coils can generate opposite excitation effects when energized, thus corresponding to the armature rotation requirements in two opposite directions. This allows the relay to switch bidirectionally between the set and reset states. This structure eliminates the need for complex reverse power supply control of a single coil to achieve bidirectional drive, which improves the clarity of the control logic and the reliability of the operation. Preferably, the armature portion has a reset position and a set position. When the left coil is energized, it drives the armature portion to rotate from the reset position to the set position. When the right coil is energized, it drives the armature portion to rotate from the set position to the reset position. When both the right coil and the left coil are de-energized, when the armature portion is in the reset position, the magnet holds the armature portion in the reset position through the holding magnetic circuit. When the armature portion is in the set position, the magnet holds the armature portion in the set position through the holding magnetic circuit.

[0015] By adopting the above technical solution, the left coil and the right coil respectively undertake the functions of setting drive and resetting drive, making the relationship between the relay's action direction and coil control clearer, which is conducive to improving control accuracy and action consistency; at the same time, it is also conducive to making the setting process and the resetting process correspond to independent and clear drive paths, thereby improving the stability and repeatability of the relay in the reciprocating switching process.

[0016] Preferably, there are two sets of both the moving connector and the stationary connector, and they correspond one-to-one. One set of the moving connector and the stationary connector forms a normally open switch structure, and the other set of the moving connector and the stationary connector forms a normally closed switch structure.

[0017] By adopting the above technical solution, the relay can simultaneously achieve the switching control of one set of contacts being turned on and another set of contacts being turned off during the armature switching process, thereby meeting the requirements of normally open / normally closed composite output, expanding the applicable scenarios of the relay, and improving its application flexibility in various control circuits.

[0018] Preferably, the moving connector includes a moving spring and a moving contact on the moving spring, the stationary connector includes a stationary spring and a stationary contact on the stationary spring, the armature portion includes a connected armature and an insulating pusher, the insulating pusher is provided with a driving body corresponding to each of the two moving springs, the driving body can drive the moving spring to undergo elastic deformation, so as to change the on / off state between the moving contact and the stationary contact.

[0019] By adopting the above technical solution, the insulating pusher transmits the mechanical action of the armature to the moving spring, and the driving body pushes the moving spring to undergo elastic deformation, so as to achieve reliable contact or separation between the moving contact and the stationary contact, thereby realizing circuit switching; at the same time, the pusher adopts an insulating structure, which is conducive to achieving electrical isolation during mechanical transmission, reducing the risk of unexpected conduction between conductive parts, and helping to improve the electrical safety and working stability of the relay.

[0020] Preferably, the armature and the insulating pusher are integrally formed by injection molding.

[0021] By adopting the above technical solution, a relatively stable connection relationship can be formed between the armature and the insulating pusher, reducing the number of assembly parts and assembly errors, and reducing the problem of unstable operation caused by loose connection and position deviation, thereby helping to improve the product assembly consistency, structural compactness and mass production stability.

[0022] Preferably, the end of the magnet closer to the magnetic conductor is one magnetic pole, and the end of the magnet farther from the magnetic conductor is another magnetic pole.

[0023] By adopting the above technical solution and setting the orientation of the magnet poles, the magnetic flux generated by the magnet can be distributed to the left and right pole shoes, thereby acting better on the armature and enabling the armature to achieve bistable power-off retention.

[0024] Preferably, the housing and the relay body are sealed together with epoxy adhesive to form a sealed structure.

[0025] By adopting the above technical solutions, the overall sealing performance of the relay can be improved, reducing the adverse effects of external dust, moisture and corrosive media entering the interior on the magnetic circuit and contact parts, thereby improving the relay's environmental adaptability and long-term operational reliability. At the same time, using epoxy adhesive for sealing connections also helps to simplify the sealing process and reduce manufacturing costs.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. This application provides a holding magnetic circuit by setting a magnet in the magnetic circuit section, so that the magnet can still form a holding magnetic circuit through the magnetic conductor, left pole shoe, right pole shoe and armature section when the electromagnet is de-energized, thereby providing a holding magnetic force to the armature section, so that the armature section can be stably held in the set position or reset position. Therefore, this application does not need to rely on the continuous energization of the coil to maintain the working state, and can achieve bistable power-off holding, which is beneficial to reduce the energy consumption of the relay and the heating of the coil, and improve the reliability of the state holding. 2. This application uses an electromagnet to generate a switching magnetic force that drives the armature to rotate when energized. This causes the electromagnetic flux generated by the coil to work together with the original magnetic flux of the magnet in the same magnetic circuit network, thereby changing the total magnetic flux distribution of the system and forming a net electromagnetic torque that is conducive to the attraction of the target side. This drives the armature to reliably switch between the set position and the reset position, thus ensuring that the relay has good action response performance and repeated switching stability. 3. By setting a left coil and a right coil, and making the winding directions of the left coil and the right coil opposite, the two coils can generate magnetic fluxes in opposite directions when energized, so as to correspond to the switching action of the armature part from the reset position to the set position and from the set position to the reset position respectively. Therefore, it is helpful to clarify the set control and reset control relationship of the relay, and improve the clarity of control logic and the consistency of action. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a sealed balanced rotary magnetic latching relay according to an embodiment of this application.

[0028] Figure 2 This is a schematic diagram used to illustrate the structure of a relay in the reset state.

[0029] Figure 3 This is a structural diagram used to illustrate a relay from another perspective.

[0030] Figure 4 This is a structural diagram used to illustrate the magnetic conductive part.

[0031] Figure 5 This is a structural diagram used to illustrate the armature section.

[0032] Figure 6This is a structural diagram used to show the armature in the reset position.

[0033] Figure 7 It is a structural diagram used to demonstrate the relay in the set state.

[0034] Figure 8 It is a structural diagram used to show the armature in its positioned position.

[0035] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Relay body; 21. Pin; 3. Contact part; 31. Moving connection; 311. Moving spring; 312. Moving contact; 32. Stationary connection; 321. Stationary spring; 322. Stationary contact; 4. Magnetic circuit part; 41. Electromagnet; 411. Iron core; 412. Left pole shoe; 413. Right pole shoe; 414. Coil assembly; 4141. Left coil; 4142. Right coil; 42. Magnetic conductive part; 421. Magnet; 422. Magnetic conductor; 423. Shaft bracket; 43. Armature part; 431. Armature; 432. Insulating pusher; 433. Hinge shaft; 434. Drive body. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0037] This application discloses a sealed balanced rotary magnetic latching relay.

[0038] Reference Figure 1 , Figure 2 A sealed balanced rotary magnetic latching relay includes a housing 1 and a relay body 2. The relay body 2 has a contact portion 3 and a magnetic circuit portion 4. The housing 1 is adapted to the relay body 2 and forms a sealed environment within the housing 1. The housing 1 and the relay body 2 are sealed together with epoxy resin, which improves the overall sealing performance of the relay and helps to improve the relay's environmental adaptability and long-term operational reliability.

[0039] Reference Figure 2 To improve the convenience of connecting the internal components of the housing to the external circuit system, a metal pin 21 is fixedly inserted into the relay body 2. In this embodiment, there are two pins 21. The contact part 3 includes a moving connector 31 and a stationary connector 32. In this embodiment, there are two sets of moving connectors 31 and stationary connectors 32. According to their positions, the moving connectors 31 and stationary connectors 32 are divided into a left moving connector 31 and its corresponding left stationary connector 32, and a right moving connector 31 and its corresponding right stationary connector 32. A normally open switch structure is formed between the right moving connector 31 and the right stationary connector 32, and a normally closed switch structure is formed between the left moving connector 31 and the left stationary connector 32.

[0040] Each set of moving connectors 31 includes a moving spring 311 and a moving contact 312, and each set of stationary connectors 32 includes a stationary spring 321 and a stationary contact 322. Each pin 21 corresponds to one moving spring 311. The end of the moving spring 311 is fixedly connected to the corresponding pin 21. The moving contact 312 is located at the end of the moving spring 311 away from the pin 21. The stationary spring 321 is fixedly connected to the relay body 2, and one end of it protrudes from the relay body 2, forming a terminal for connection with the external circuit system. The stationary contact 322 is located at the end of the stationary spring 321 that does not protrude from the relay body 2, and is positioned opposite to the moving contact 312.

[0041] Reference Figure 2 , Figure 3 The magnetic circuit part 4 includes an electromagnet 41, a magnetically conductive part 42, and an armature part 43. In this embodiment, the electromagnet 41 includes an iron core 411, a left pole shoe 412, a right pole shoe 413, and a coil assembly 414. The left pole shoe 412 and right pole shoe 413 are both L-shaped structures spaced apart from each other and are fixedly connected to the relay body 2. The iron core 411 is mounted on the left pole shoe 412 and right pole shoe 413, forming a magnetically conductive connection between the iron core 411 and the left and right pole shoes 412 and 413. In this embodiment, the coil assembly 414 includes a left coil 4141 and a right coil 4142. Both the left and right coils are wound around the iron core 411, and their winding directions are opposite, causing them to generate opposite excitation magnetic fluxes when energized.

[0042] Reference Figure 3 , Figure 4 In this embodiment, the magnetically conductive part 42 includes a magnet 421 and a magnetically conductive body 422. The magnetically conductive body 422 is made of soft magnetic material and is straddling the left pole shoe 412 and the right pole shoe 413, and is fixed by adhesive bonding. The magnet 421 is installed on the side of the magnetically conductive body 422 facing the coil. The magnet 421 is fixedly connected to the magnetically conductive body 422 by adhesive bonding. The two poles of the magnet 421 are located at one end closer to the magnetically conductive body 422 and the other end farther from the magnetically conductive body 422. In this example, the end of the magnet 421 closer to the magnetically conductive body 422 is the N pole, and the other end is the S pole.

[0043] Reference Figure 2 , Figure 5A non-magnetic shaft bracket 423 is provided between the left pole shoe 412 and the right pole shoe 413. In this embodiment, the shaft bracket 423 is preferably made of stainless steel. The two ends of the shaft bracket 423 are fixedly connected to the left pole shoe 412 and the right pole shoe 413, respectively. The armature part 43 is disposed in the space between the magnet 421 and the coil. In this embodiment, the armature part 43 includes an armature 431 and an insulating pusher 432. The armature 431 and the insulating pusher 432 are integrally molded and connected. The insulating pusher 432 is rotatably connected to the shaft bracket 423 through a hinge shaft 433, so that the two ends of the armature 431 can rotate around the hinge shaft 433.

[0044] The magnet 421 is symmetrically arranged about the vertical plane containing the rotation axis of the hinge shaft 433, and the armature 431 is also symmetrically arranged about the rotation axis of the hinge shaft 433. This arrangement facilitates the equivalent switching between the left and right sides of the armature 431, makes it easier to form a more stable force balance and rotational torque, and ensures reliable operation of both steady states when power is off.

[0045] The insulating pusher 432 is provided with two drive bodies 434, each drive body 434 corresponding to a moving spring 311. The drive bodies 434 and the insulating pusher 432 are integrally formed. The two drive bodies 434 are divided into a left drive body 434 and a right drive body 434 according to their positions. The left drive body 434 is located below the left moving spring 311, and the right drive body 434 is located above the right moving spring 311.

[0046] Reference Figure 2 , Figure 6 In this embodiment, the relay has a reset state and a set state. The reset state corresponds to the armature 431 being in the reset position, and the set state corresponds to the armature 431 being in the set position. When the relay is in the reset state, the right moving connection 31 is disconnected from the right stationary connection 32, and the left moving connection 31 is connected to the left stationary connection 32. At this time, the armature 431 is in the reset position where the right end is in contact with the right pole shoe 413 and the left end is disconnected from the left pole shoe 412.

[0047] Reference Figure 7 , Figure 8 When the relay is in the set state, the right moving connector 31 and the right stationary connector 32 are connected, and the left moving connector 31 and the left stationary connector 32 are disconnected. At this time, the armature 431 is in the set position where the left end is in contact with the left pole shoe 412 and the right end is disconnected from the right pole shoe 413.

[0048] When the relay is in the reset state, neither the left coil 4141 nor the right coil 4142 is energized. The right end of the armature 431 is in contact with the right pole shoe 413, while the left end is detached from the left pole shoe 412, creating a relatively large air gap. At this time, due to the smaller air gap on the right side and the lower corresponding magnetic reluctance, the magnetic flux generated by the magnet 421, after being distributed by the magnetic conductor 422, tends to close along the lower magnetic reluctance path on the right side, forming a holding magnetic circuit through the right pole shoe 413 and the armature portion 43. In this state, the lower magnetic reluctance on the right side causes the right end of the armature portion 43 to be subjected to a strong magnetic attraction, thus keeping the armature portion 43 stably in the reset position. At this time, even if neither the left coil 4141 nor the right coil 4142 is continuously powered, the armature portion 43 can still maintain the reset state under the magnetic force of the magnet 421.

[0049] When it is necessary to switch the relay from the reset state to the set state, the left coil 4141 or the corresponding set drive coil is energized, causing the electromagnet 41 to generate a switching magnetic force that drives the armature 431 to rotate to the left. After the coil is energized, an electromagnetic operating flux is established between the iron core 411, the left pole shoe 412, the right pole shoe 413, and the armature 431. This electromagnetic operating flux does not exist in isolation, but acts together with the original magnetic flux of the magnet 421 in the same magnetic circuit network, thereby changing the total magnetic flux distribution of the system.

[0050] After the left coil 4141 is energized, the total magnetic field distribution of the system changes in a direction favorable to the left-side attraction, causing the left end of the armature 431 to receive a rotational torque that moves it closer to the left pole shoe 412. Since the armature 431 can rotate around the hinge axis, under the action of this rotational torque, the armature 431 begins to rotate from the reset position to the set position. As the armature 431 continues to rotate, the left-side air gap gradually decreases, the left-side magnetic reluctance gradually decreases, and the left-side attraction further strengthens; at the same time, the right-side air gap gradually increases, the right-side magnetic reluctance gradually increases, and the right-side attraction gradually weakens, thus forming a positive feedback process that favors the armature 431 continuing to rotate to the left.

[0051] During this process, the armature 431 drives the left and right moving connectors 31 to move synchronously via the insulating pusher 432. This causes the left moving connector 31, which was originally in a conductive state, to gradually separate from the left stationary connector 32, while the right moving connector 31, which was originally in a disconnected state, gradually approaches and contacts the right stationary connector 32. When the armature 431 rotates to its limit position, the left end of the armature 431 contacts the left pole shoe 412, and the right end of the armature 431 disconnects from the right pole shoe 413, thus completing the switch from the reset position to the set position. At this time, the right moving connector 31 is conductive with the right stationary connector 32, and the left moving connector 31 is disconnected from the left stationary connector 32, thereby achieving a reverse conversion of the contact state.

[0052] When the set drive coil is de-energized, the electromagnetic flux generated by the coil disappears, and the system is once again provided with holding magnetic force by the magnet 421. At this time, the armature 431 is in the set position, that is, the left end of the armature 431 is in contact with the left pole shoe 412, and the right end of the armature 431 is disconnected from the right pole shoe 413; at the same time, the right moving connector 31 is connected to the right stationary connector 32, and the left moving connector 31 is disconnected from the left stationary connector 32.

[0053] In this state, since the left end of the armature 431 is in contact with the left pole shoe 412, the air gap on the left side is smaller and the magnetic reluctance on the left side is lower, while the air gap on the right side is larger and the magnetic reluctance on the right side is higher. Therefore, the magnetic flux generated by the magnet 421 will preferentially be distributed along the low magnetic reluctance path that is conducive to the closure of the left side, thereby forming a strong magnetic adsorption holding effect on the left side, so that the armature 431 is stably held in the position when the left end is attracted.

[0054] Because the armature 431 is stably held in the set position, the right moving connector 31 remains continuously connected to the right stationary connector 32, while the left moving connector 31 remains continuously disconnected from the left stationary connector 32. Therefore, the relay, even in the set state, does not require continuous coil energization to maintain the contact state, demonstrating another stable operating state of the bistable magnetic latching structure of this application.

[0055] When it is necessary to switch the relay from the set state to the reset state, the right coil 4142 or the corresponding reset drive coil is energized, causing the electromagnet 41 to generate a switching magnetic force that drives the armature 431 to rotate to the right. Since the winding directions of the left and right coils 4142 are opposite, the direction of the excitation force generated after the reset drive coil is energized is opposite to that during the set drive. The electromagnetic flux generated by this coil, together with the original magnetic flux of the magnet 421, acts on the magnetic circuit network, causing the total magnetic flux distribution of the system to change in a direction that favors the right-side engagement.

[0056] On the one hand, under the influence of the change in magnetic field distribution, a net electromagnetic torque is generated at both ends of the armature 431, opposite to that generated during the setting process, thereby driving the armature 431 to rotate in the opposite direction around the hinge axis. On the other hand, the deformed moving spring 311 needs to return to its original shape, and in the process of returning to its original shape, it pushes the armature 431 to rotate in the opposite direction. As the armature 431 rotates from the set position to the reset position, the air gap on the right side gradually decreases, the magnetic resistance on the right side gradually decreases, and the attraction on the right side gradually increases; the air gap on the left side gradually increases, the magnetic resistance on the left side gradually increases, and the attraction on the left side gradually weakens. Therefore, the armature 431 continues to rotate to the right until its right end re-contacts the right pole shoe 413 and its left end disconnects from the left pole shoe 412, thus completing the switch from the set position to the reset position.

[0057] During this switching process, armature 431 drives the left and right moving connectors 31 in the opposite direction via the pusher, causing the right moving connector 31 to gradually disengage from the right stationary connector 32 and return to the disconnected state, while simultaneously causing the left moving connector 31 to re-engage with the left stationary connector 32 and return to the conducting state. Thus, the relay returns to the contact conduction relationship corresponding to the reset state.

[0058] When the reset drive coil is de-energized, the magnet 421 again attracts and holds the armature 431 through the low magnetic resistance path on the right, so that the armature 431 is stably held in the reset position, thereby keeping the left moving connector 31 and the left stationary connector 32 connected, and keeping the right moving connector 31 and the right stationary connector 32 disconnected, thus completing the de-energization holding of the relay from the set state to the reset state.

[0059] In this application, the magnetic conductor 422 has a dual function. On the one hand, the magnetic conductor 422 is used to mount the magnet 421; on the other hand, the magnetic conductor 422 is used to magnetically connect the left pole shoe 412 and the right pole shoe 413, providing a low magnetic resistance magnetic conduction channel for the magnet 421. With the help of the magnetic conductor 422, the magnetic flux generated by the magnet 421 is no longer randomly distributed in a free divergence manner, but can be effectively guided to the corresponding regions of the left pole shoe 412, the right pole shoe 413, and the armature 431, so as to form a stable and controllable holding magnetic circuit.

[0060] Meanwhile, although the magnetic conductor 422 alters the original free magnetic field distribution of the magnet 421, this alteration is not a negative effect. Instead, it guides, concentrates, and redistributes the magnetic flux of the magnet 421, transforming the magnetic field of the magnet 421 from a free-diffusion state to a controlled magnetic circuit state formed by the magnetic conductor 422, the pole shoe, and the armature 431. This not only improves the magnetic flux utilization efficiency but also enhances the stability of the armature 431 in the reset and set positions during power-off, thereby ensuring the relay has reliable bistable holding capability.

[0061] The implementation principle of a sealed balanced rotary magnetic latching relay according to an embodiment of this application is as follows: In the de-energized state, the magnet 421 provides the holding magnetic force; the set drive coil and reset drive coil provide the switching magnetic force when energized; and the magnetic flux of the magnet 421 is guided and distributed by the magnetic conductor 422, enabling the armature 431 to reliably switch between the reset and set positions and maintain this position continuously after de-energization. Specifically, in the reset state, the right end of the armature 431 is in contact with the right pole shoe 413, and the left end is disconnected from the left pole shoe 412; the right moving connector 31 is disconnected from the right stationary connector 32, and the left moving connector 31 is connected to the left stationary connector 32. In the set state, the left end of the armature 431 is in contact with the left pole shoe 412, and the right end is disconnected from the right pole shoe 413; the right moving connector 31 is connected to the right stationary connector 32, and the left moving connector 31 is disconnected from the left stationary connector 32. Therefore, this application achieves a low-power, high-stability, and repeatedly switchable magnetic latching relay operation mode.

[0062] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A sealed, balanced rotary magnetic latching relay, characterized in that, It includes a housing (1) and a relay body (2), wherein the relay body (2) is provided with a contact portion (3) and a magnetic circuit portion (4); The contact portion (3) includes a dynamic connector (31) and a static connector (32); The magnetic circuit part (4) includes an electromagnet (41), a magnetically conductive part (42), and an armature part (43). The armature part (43) is rotatably connected to the relay body (2) and can rotate around the hinge axis (433). The armature part (43) is drively connected to the moving connecting body (31) to drive the moving connecting body (31) to move, so that the moving connecting body (31) and the stationary connecting body (32) switch the conduction state. The electromagnet (41) is used to generate a switching magnetic force that drives the armature part (43) to rotate when the coil is energized; The magnetically conductive part (42) includes a magnetically conductive body (422) and a magnet (421). The magnet (421) is disposed on the magnetically conductive body (422). When the electromagnet (41) is de-energized, the magnet (421) forms a holding magnetic force on the armature part (43) through the magnetically conductive body (422) so that the armature part (43) is stably held in the set position or the reset position.

2. The sealed balanced rotary magnetic latching relay according to claim 1, characterized in that: The electromagnet (41) includes an iron core (411), a left pole shoe (412), a right pole shoe (413), and a coil assembly (414). The coil assembly (414) is disposed on the iron core (411). The left pole shoe (412) and the right pole shoe (413) are respectively disposed on both sides of the iron core (411) and correspond to the left and right ends of the armature portion (43), so that the iron core (411), the left pole shoe (412), the right pole shoe (413), and the armature portion (43) form an electromagnetic operating circuit.

3. The sealed balanced rotary magnetic latching relay according to claim 2, characterized in that: The magnetic conductor (422) is magnetically connected to the left pole shoe (412) and the right pole shoe (413), and the magnet (421) is disposed on the magnetic conductor (422) so that the magnet (421) forms a holding magnetic circuit through the magnetic conductor (422), the left pole shoe (412), the right pole shoe (413) and the armature portion (43).

4. The sealed balanced rotary magnetic latching relay according to claim 2, characterized in that: The coil assembly (414) includes a left coil (4141) and a right coil (4142), both of which are wound on the iron core (411). The left coil (4141) and the right coil (4142) are wound in opposite directions so that when the left coil (4141) and the right coil (4142) are energized, they generate magnetic fluxes in opposite directions.

5. The sealed balanced rotary magnetic latching relay according to claim 4, characterized in that: The armature part (43) has a reset position and a set position. When the left coil (4141) is energized, it drives the armature part (43) to rotate from the reset position to the set position. When the right coil (4142) is energized, it drives the armature part (43) to rotate from the set position to the reset position. When both the right coil (4142) and the left coil (4141) are de-energized, when the armature part (43) is in the reset position, the magnet (421) holds the armature part (43) in the reset position through the holding magnetic circuit; when the armature part (43) is in the set position, the magnet (421) holds the armature part (43) in the set position through the holding magnetic circuit.

6. The sealed balanced rotary magnetic latching relay according to claim 1, characterized in that: The number of the moving connector (31) and the stationary connector (32) are both two sets and correspond one-to-one. One set of the moving connector (31) and the stationary connector (32) form a normally open switch structure, and the other set of the moving connector (31) and the stationary connector (32) form a normally closed switch structure.

7. The sealed balanced rotary magnetic latching relay according to claim 6, characterized in that: The moving connector (31) includes a moving spring (311) and a moving contact (312) disposed on the moving spring (311), and the stationary connector (32) includes a stationary spring (321) and a stationary contact (322) disposed on the stationary spring (321); The armature part (43) includes an armature (431) and an insulating pusher (432) connected to each other. The insulating pusher (432) is provided with a drive body (434) corresponding to the two moving springs (311). The drive body (434) can drive the moving springs (311) to undergo elastic deformation to change the on / off state between the moving contact (312) and the stationary contact (322).

8. The sealed balanced rotary magnetic latching relay according to claim 7, characterized in that: The armature (431) and the insulating pusher (432) are connected by injection molding.

9. The sealed balanced rotary magnetic latching relay according to claim 3, characterized in that: The end of the magnet (421) closest to the magnetic conductor (422) is one magnetic pole, and the end of the magnet (421) furthest from the magnetic conductor (422) is the other magnetic pole.

10. The sealed balanced rotary magnetic latching relay according to claim 1, characterized in that: The housing (1) and the relay body (2) are sealed together by epoxy resin to form a sealed structure.

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