Magnetic latching relay with locking structure

Abstract

The invention discloses a magnetic latching relay with a locking structure, and relates to the technical field of magnetic latching relays, the magnetic latching relay comprises a shell, the shell is of a box body structure and is divided into a length direction, a width direction and a height direction, and a contact structure, a rotary switching structure, a coil structure and the locking structure are sequentially arranged in the shell along the length direction; the rotating switching structure comprises a rotating plate, an abutting block is integrally formed on the edge of the lower surface of the rotating plate, the abutting block is located above the locking structure, and the locking structure is used for assisting in keeping the contact state of the magnetic latching relay; the locking structure comprises a locking yoke, the locking yoke is of a U-shaped structure, a U-shaped groove is formed in the middle of the locking yoke, a second coil frame is installed in the U-shaped groove of the locking yoke, the second coil frame is of an I shape, the middle of the second coil frame is sleeved with a second coil, and the magnetic latching relay can effectively assist in keeping the state.

Description

Technical Field

[0001] This invention relates to the field of magnetic latching relay technology, specifically to a magnetic latching relay with a locking structure. Background Technology

[0002] Magnetic latching relays, as low-power, high-reliability electromagnetic control components, operate on the principle of self-holding of contacts using the magnetic field of a permanent magnet. They maintain the engaged or disengaged state without continuous energization. Specifically, when a positive or negative pulse current is applied to the coil, the resulting electromagnetic force drives the armature to move, closing or opening the contacts. After the pulse current disappears, the magnetic field of the permanent magnet acts alone, holding the armature in its current position until a reverse pulse current is applied to trigger a state switch. This characteristic makes them widely used in smart meters, new energy storage systems, smart homes, rail transportation, and other fields with high requirements for power consumption and stability.

[0003] In practical applications, existing magnetic latching relays rely solely on the magnetic field of permanent magnets to maintain the contact state, which poses significant reliability risks. Therefore, it is imperative to strengthen the relays with a latching structure. This necessity stems from the following aspects: the magnetic properties of permanent magnets are easily affected by factors such as temperature cycling and service life, leading to irreversible decay. Simultaneously, coil insulation aging can increase leakage flux, further weakening the magnetic field holding force. Furthermore, relays inevitably suffer from vibration, impact, and other mechanical forces during transportation, installation, and operation, and external magnetic fields generated by surrounding strong electromagnetic equipment can also interfere with magnetic balance. These factors can all disrupt the steady state of the contacts. In addition, wear, oxidation, arc erosion, and uneven contact pressure caused by assembly errors after long-term use can alter the contact reaction characteristics, further increasing the risk of instability.

[0004] Specifically, existing magnetic latching relays lacking a locking structure are prone to several failure modes: First, magnetic field attenuation or leakage leads to insufficient holding force, causing the contacts to open and close on their own without a switching pulse, resulting in circuit malfunctions, such as metering errors in smart meters or failure of energy storage system protection; Second, external mechanical force overcomes the magnetic holding force, causing contact jitter, increased contact resistance, or even permanent state reversal, affecting the stability of the electrical system; Third, the change in contact reaction force exceeds the magnetic holding force, leading to loose contact, arcing, and accelerating relay failure; Fourth, external magnetic field interference disrupts the magnetic balance, causing irregular opening and closing of the contacts, disrupting the normal operation of the system.

[0005] The aforementioned failure modes severely limit the reliability of magnetic latching relays under harsh operating conditions such as high vibration, alternating high and low temperatures, and strong electromagnetic interference. Therefore, developing a magnetic latching relay with a locking structure is of great significance for overcoming the shortcomings of existing technologies and improving the applicability and reliability of products. Summary of the Invention

[0006] The purpose of this invention is to provide a magnetic latching relay with a locking structure to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a magnetic latching relay with a locking structure, including a housing, the housing being a box structure and divided into a length direction, a width direction and a height direction, the interior of the housing being provided with a contact structure, a rotary switching structure, a coil structure and a locking structure in sequence along the length direction, the rotary switching structure including a rotating plate, the lower surface edge of the rotating plate being integrally formed with an abutment block, the abutment block being located above the locking structure, the locking structure being used to assist in maintaining the contact state of the magnetic latching relay; The locking structure includes a locking yoke, which is U-shaped with a U-shaped groove in the middle. A second coil frame is installed inside the U-shaped groove of the locking yoke. The second coil frame is I-shaped, and a second coil is sleeved in the middle of the second coil frame. A yoke plate abuts against the upper part of the second coil frame near the abutting block. The yoke plate is engaged with the top two sides of the locking yoke. A through hole is opened in the middle of the locking yoke, the second coil frame, and the yoke plate along the height direction. A magnetic cylinder is installed at the through hole on the lower half of the locking yoke and the second coil frame. A push rod is installed at the through hole on the upper half of the yoke plate and the second coil frame. A second limiting ring is fixedly installed on the outer surface of the push rod above the yoke plate. A spring is wound around the outer surface of the push rod between the second limiting ring and the yoke plate.

[0008] The present invention further explains that a pin rod is installed inside the magnetic cylinder, and a first limiting ring is fixedly provided on the outer circumference of the pin rod. One end of the push rod located in the through hole is set as a cone shape, and a pin groove is opened in the middle of the cone-shaped end. The diameter of the pin groove is smaller than the diameter of the first limiting ring.

[0009] The present invention further describes that the outer shell has two interconnected cavities, a contact structure installed inside cavity one, a rotary switching structure installed between cavity one and cavity two, and a coil structure and a locking structure installed inside cavity two.

[0010] The present invention further describes that the outer shell is provided with welding copper busbars, which are configured as four groups. The four groups of welding copper busbars are respectively connected to a first stationary terminal, a first moving terminal, a second moving terminal, and a second stationary terminal. The first stationary terminal, the first moving terminal, the second moving terminal, and the second stationary terminal are staggered along the length direction of the shell. The first stationary terminal and the second moving terminal are located on the same side of the inner wall of the shell, and the first moving terminal and the second stationary terminal are located on the other side of the inner wall of the shell.

[0011] The present invention further explains that the contact structure includes a first parallel component, a first series component, a second series component, and a second parallel component, one end of each of the first parallel component, the first series component, the second series component, and the second parallel component being respectively connected to a first stationary terminal, a first moving terminal, a second moving terminal, and a second stationary terminal.

[0012] The present invention further explains that the first parallel assembly and the second parallel assembly have the same structure but opposite directions. The first parallel assembly includes several sets of first moving spring plates. The two sides of the first moving spring plates are respectively connected to first moving contacts. The first moving contact on the side adjacent to the first stationary terminal is installed through the first stationary terminal. The first moving contact on the side away from the first stationary terminal passes through the first moving spring plate and is fixedly connected to a first fixed connecting piece.

[0013] The present invention further explains that the first series assembly and the second series assembly have the same structure but opposite directions. The first series assembly includes several sets of second moving spring plates. The two sides of the second moving spring plates are respectively connected to second moving contacts. The second moving contact on the side adjacent to the first moving terminal is installed through the first moving terminal. The second moving contact on the side away from the first moving terminal is installed through the second moving spring plate and is fixedly connected to a second fixed connecting piece.

[0014] The present invention further describes that the coil structure includes a first coil, the two ends of the first coil are supported and connected to a first coil frame, and the side of the first coil frame away from the first coil is supported and connected to a yoke. The yoke is arranged in an L-shape, and a pin is installed on the top of one of the first coil frames.

[0015] The present invention further explains that the rotary switching structure includes a fixed seat located above the yoke. A protrusion is integrally provided on the surface of the yoke facing the fixed seat. A positioning groove 1 matching the shape and position of the protrusion is provided in the middle of the surface of the fixed seat. Positioning grooves 2 matching the shape and position of the top of the first coil frame are provided on both sides of the fixed seat. The fixed seat is engaged with the yoke and the first coil frame through the positioning grooves 1 and 2 respectively. A rotating central shaft is connected through the middle of the side of the rotating plate facing the contact structure. Rotating side shafts are integrally connected to both sides of the rotating plate on the rotating central shaft. A first pushing block and a second pushing block are connected to the two rotating side shafts respectively. Pushing grooves are provided on the surfaces of the first pushing block and the second pushing block.

[0016] The present invention further describes that a movable yoke and an armature are arranged parallel to each other along the height direction inside the rotating plate. The two sides of the movable yoke and the armature are respectively protruding from the corresponding sides of the rotating plate. A rotating shaft magnet is installed inside the rotating plate between the movable yoke and the armature.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention employs a contact structure, a rotary switching structure, a coil structure, and a locking structure in coordinated motion. The contact structure is used for switching the contact state. The rotary switching structure executes the state switching process of the contact structure through magnetic attraction control. The coil structure is used to control the rotary switching structure to switch the series and parallel states of the contact structure using positive or negative pulse current. The locking structure is used to assist in maintaining the contact state of the magnetic latching relay. By switching between the unlocked and locked states of the locking structure, the stability and reliability of the magnetic latching relay in the series and parallel states are improved. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is an external schematic diagram of the overall structure in this invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is the present invention. Figure 2 Mid-top view of the structure; Figure 4 This is a schematic diagram of the internal structure of the outer shell in this invention; Figure 5 This is a schematic diagram showing the connection of the coil structure, rotation switching structure, locking structure, and contact structure in this invention; Figure 6 This is the present invention. Figure 5 A schematic diagram of the front view of the contact structure; Figure 7 This is the present invention. Figure 6 Schematic diagram of series and parallel states under middle contact; Figure 8 This is a schematic diagram of the overall structure of the rotation switching structure in this invention; Figure 9 This is a schematic diagram showing the connection between the coil structure and the rotary switching structure in this invention; Figure 10 This is a schematic diagram showing the connection between the locking structure and the rotation switching structure in this invention; Figure 11 This is a cross-sectional schematic diagram of the locking structure in this invention; Figure 12 This is a schematic diagram of the unlocking state logic of the locking structure in this invention; Figure 13 In this invention Figure 10 A schematic diagram of the structure viewed from below; In the diagram: 1. Outer shell; 11. First mounting slot; 12. Second mounting slot; 13. Third mounting slot; 14. First connecting block; 15. Second connecting block; 16. Third connecting block; 17. Side snap-fit ​​slot; 2. Cover; 3. Welded copper busbar; 31. First stationary terminal; 32. First moving terminal; 33. Second moving terminal; 34. Second stationary terminal; 4. Coil structure; 41. First coil; 42. First coil frame; 43. Yoke; 44. Pin; 5. Rotation switching structure; 51. Fixed base; 52. Rotating plate; 53. Rotating central shaft; 54. Moving yoke; 55. Armature; 56. Rotating side shaft; 57. 58. Abutment block; 59. First push block; 6. Second push block; 6. Locking structure; 61. Circuit board; 62. Locking yoke; 63. Second coil frame; 64. Second coil; 65. Yoke plate; 66. Push rod; 67. Spring; 68. Magnetic cylinder; 69. Pin rod; 7. Contact structure; 71. First parallel assembly; 711. First moving spring plate; 712. First fixed connecting plate; 713. First moving contact; 72. First series assembly; 721. Second moving spring plate; 722. Second fixed connecting plate; 723. Second moving contact; 73. Second series assembly; 74. Second parallel assembly. Detailed Implementation

[0019] The following detailed, non-limiting description of the technical solution of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] Please see Figures 1 to 13 The present invention provides a technical solution: a magnetic latching relay with a locking structure, including a housing 1, wherein the housing 1 is configured as a box structure, so as to... Figure 1For example, the outer casing 1 is divided into length, width, and height directions according to its box structure. Several mounting seats are fixedly connected to the outer wall of the outer casing 1 for securely connecting the magnetic latching relay to external devices. The outer casing 1 has an opening on one side along the height direction, and a cover 2 is fixedly connected to the opening through adhesive. A marking layer is also provided on the outer surface of the cover 2 for marking relevant operating information of the relay. The outer casing 1 is also provided with a welding copper busbar 3, which is used to connect to external devices and realize the transmission of current. Taking the figure as an example, the welding copper busbar 3 is set into four groups. The four groups of welding copper busbar 3 are respectively connected to the first stationary terminal 31, the first moving terminal 32, the second moving terminal 33, and the second stationary terminal 34 to realize electrical connection. The first stationary terminal 31, the first moving terminal 32, the second moving terminal 33, and the second stationary terminal 34 are staggered along the length direction of the outer casing 1. The first stationary terminal 31 and the second moving terminal 33 are located on the same side of the inner wall of the outer casing 1, and the first moving terminal 32 and the second stationary terminal 34 are located on the other side of the inner wall of the outer casing 1.

[0021] Furthermore, the interior of the outer casing 1 has two interconnected cavities, and the interior of the outer casing 1 is provided with a contact structure 7, a rotary switching structure 5, a coil structure 4, and a locking structure 6 arranged sequentially along the length direction. The contact structure 7 is installed inside the first cavity, and the coil structure 4 and the locking structure 6 are installed inside the second cavity. Alternatively, the contact structure 7, the rotary switching structure 5, the coil structure 4, and the locking structure 6 can be arranged sequentially along the length direction on the cover 2, with the rotary switching structure 5 installed between the first and second cavities. The contact structure 7 is used for switching the contact state, the rotary switching structure 5 executes the state switching process of the contact structure 7 through magnetic attraction control, the coil structure 4 is used to control the change of the magnetic attraction state of the rotary switching structure 5 using positive or negative pulse current, and the locking structure 6 is used to help maintain the contact state of the magnetic latching relay and improve its contact stability.

[0022] Specifically, refer to Figures 2 to 6 The contact structure 7 includes a first parallel component 71, a first series component 72, a second series component 73, and a second parallel component 74. One end of the first parallel component 71, the first series component 72, the second series component 73, and the second parallel component 74 are respectively connected to the first stationary terminal 31, the first moving terminal 32, the second moving terminal 33, and the second stationary terminal 34. That is, the parallel component is electrically connected to the stationary terminal, and the series component is electrically connected to the moving terminal, which is used for switching between series and parallel connection circuits. When installing the first stationary terminal 31, the first moving terminal 32, the second moving terminal 33, and the second stationary terminal 34 into the housing 1, side-mounted slots 17 are respectively provided on the inner wall of the housing 1 near the positions of the first stationary terminal 31, the first moving terminal 32, the second moving terminal 33, and the second stationary terminal 34, to support the side of the adjacent terminal; furthermore, a first connecting block 14 and a second connecting block 15 are sequentially arranged along the length direction inside the cavity 1. The first connecting block 14 has a latch 1 on the side facing the second stationary terminal 34, which is used to support the side of the second stationary terminal 34 away from the inner wall of the housing 1; the second connecting block 15 is respectively facing the first... A second and a third latch are provided on one side of the first moving terminal 32 and the second moving terminal 33, respectively. The second and third latches are used to support and connect the other side of the first moving terminal 32 and the second moving terminal 33 away from the inner wall of the outer casing 1. A third connecting block 16 is provided on the inner wall of the outer casing 1 perpendicular to the length direction and adjacent to the other side of the first stationary terminal 31. A fourth latch is provided on the side of the third connecting block 16 facing the first stationary terminal 31. The fourth latch is used to support and connect the other side of the second stationary terminal 34. Thus, the installation of the contact structure 7 in the outer casing 1 is completed by setting the first connecting block 14, the second connecting block 15, the third connecting block 16 and the side latching groove 17 inside the outer casing 1.

[0023] Further reference Figure 6 The first parallel assembly 71 and the second parallel assembly 74 have the same structure but opposite directions. Taking the first parallel assembly 71 as an example, the first parallel assembly 71 includes several sets of first moving spring plates 711. First moving contacts 713 are connected to both sides of each first moving spring plate 711. The first moving contact 713 on the side adjacent to the first stationary terminal 31 is installed through the first stationary terminal 31, while the first moving contact 713 on the side away from the first stationary terminal 31 passes through the first moving spring plate 711 and is fixedly connected to a first fixed connecting piece 712. In this case, the first series assembly 72 and the second series assembly 73 have the same structure but opposite directions. Taking the first series assembly 72 as an example, the first series assembly 72 includes several sets of second moving spring plates 721. The two sides of the second moving spring plate 721 are respectively connected to second moving contacts 723. The second moving contact 723 on the side adjacent to the first moving terminal 32 is installed through the first moving terminal 32, and the second moving contact 723 on the side away from the first moving terminal 32 passes through the second moving spring plate 721 and is fixedly connected to the second fixed connecting piece 722. refer to Figure 7 Figures a and b simply represent the series and parallel states under contact conditions, respectively. Figure a shows the series state where the first series component 72 and the second series component 73 are connected, and Figure b shows the parallel state where the first parallel component 71 is connected to the first series component 72, and the second series component 73 is connected to the second parallel component 74.

[0024] Furthermore, the coil structure 4 includes a first coil 41, which is specifically a coil enameled wire. The two ends of the first coil 41 are supported and connected to a first coil frame 42. The side of the first coil frame 42 away from the first coil 41 is supported and connected to a yoke 43. The yoke 43 is L-shaped. The cavity two is provided with a second mounting groove 12 and a third mounting groove 13 corresponding to the installation position of the yoke 43. The second mounting groove 12 and the third mounting groove 13 form an L-shape. In addition, to improve the installation stability of the yoke 43, the surface of the yoke 43 can be provided with protrusions. The cavity two is provided with matching slots at the positions of the protrusions. When installing the yoke 43, the second mounting groove 12, the third mounting groove 13 and the slot are aligned to complete the insertion of the yoke 43, thereby realizing the installation of the coil structure 4 in the cavity two.

[0025] The rotary switching structure 5 includes a fixed base 51 located above the yoke 43. The yoke 43 has an integrally formed protrusion on its surface facing the fixed base 51. The fixed base 51 has a positioning groove 1 in the middle of its surface that matches the shape and position of the protrusion. The fixed base 51 has positioning grooves 2 on both sides that match the shape and position of the top of the first coil frame 42. The fixed base 51 is engaged with the yoke 43 and the first coil frame 42 through the positioning grooves 1 and 2, respectively, thereby locking the position of the fixed base 51 and improving the installation stability of the coil structure 4. A PIN pin 44 is installed on the top of the first coil frame 42. The PIN pin 44 transmits forward or reverse drive signals to form a complete current loop. Further, refer to Figures 8 to 10 The rotary switching structure 5 also includes a rotary plate 52. A rotary central shaft 53 is connected through the middle of the side of the rotary plate 52 facing the contact structure 7. A rotation groove is provided at the bottom of the cavity corresponding to the end of the rotary central shaft 53. In addition, an arc-shaped groove with the same curvature is provided on one side of the peripheral surface of the first connecting block 14 matching the rotary central shaft 53. The rotary groove and the arc-shaped groove facilitate the installation of the overall structure of the rotary switching structure 5. Rotary side shafts 56 are integrally connected to both sides of the rotary plate 52 and the rotary central shaft 53. The two rotary side shafts 56 are respectively connected to a first push block 58 and a second push block 59. Push grooves are provided on the surfaces of the first push block 58 and the second push block 59 corresponding to the positions of the adjacent fixed connecting pieces, for placing and pushing the fixed connecting pieces, thereby driving the moving contact to move. Furthermore, a movable yoke 54 and an armature 55 are arranged parallel to each other along the height direction inside the rotating plate 52. The two sides of the movable yoke 54 and the armature 55 are respectively protruding from the corresponding sides of the rotating plate 52. A rotating shaft magnet is installed inside the rotating plate 52 located between the movable yoke 54 and the armature 55, which is not shown in the figure. For example, when a positive pulse current is applied to the first coil 41, the generated magnetic field forms a closed magnetic circuit through the rotating shaft magnet, yoke 43, and armature 55. The generated electromagnetic force drives the armature 55 to move, causing the right end of the armature 55 to attract the yoke 43 located on the right side. This, in turn, sequentially drives the rotating plate 52, the moving yoke 54, and the rotating side shaft 56 to rotate counterclockwise around the center line of the rotating central shaft 53 until the armature 55 and yoke 43 are attracted. This pushes the second push block 59 to connect the moving contacts of the second parallel assembly 74 and the second series assembly 73, and the moving contacts of the first parallel assembly 71 and the first series assembly 72, forming... Figure 7 b) Parallel connection under contact conditions; similarly, when a reverse pulse current is applied to the first coil 41, the generated electromagnetic force drives the armature 55 to move, causing the left end of the armature 55 to engage with the yoke 43 located on the left side. The rotating side shaft 56 rotates clockwise around the central rotating shaft 53, and the first pushing block 58 connects the moving contacts of the first series assembly 72 and the second series assembly 73, forming Figure 7 The series connection state of the contacts in a; thus, the coil structure 4 uses the positive or negative pulse current to drive the rotating switching structure 5 to switch the series and parallel connection state of the contact structure 7.

[0026] It should be noted that the following is for reference only. Figure 10 The rotating plate 52 has an integrally formed abutment block 57 on the lower surface edge above the locking structure 6 to improve the retention and reliability of the contact state. Specifically, the locking structure 6 includes a locking yoke 62, which has a U-shaped structure and a U-shaped groove in the middle. The bottom of the outer shell 1 is provided with a first mounting groove 11 corresponding to the lower surface of the locking yoke 62, so as to quickly and efficiently lock its installation position when the locking structure 6 is installed. A second coil frame 63 is installed inside the U-shaped groove of the locking yoke 62. The second coil frame 63 is I-shaped, and a second coil 64 is sleeved in the middle of the second coil frame 63. The second coil 64 is also a coil enameled wire. That is, the second coil frame 63 includes a cylindrical part located inside the second coil 64 and fixing plates located on the upper and lower surfaces of the cylindrical part respectively. One of the fixing plates on the second coil frame 63 is electrically connected to a circuit board 61. A yoke plate 65 abuts against the upper part of the second coil frame 63 near the abutting block 57. The yoke plate 65 is engaged with the top two sides of the locking yoke 62. Further, refer to Figure 11This is a half-sectional view of the unlocked state of the locking structure 6. A through hole is formed along the height direction in the middle of the locking yoke 62, the second coil frame 63, and the yoke plate 65. A magnetic cylinder 68 is installed on the lower half of the locking yoke 62 and the second coil frame 63 at the through hole. A pin rod 69 is installed inside the magnetic cylinder 68. A first limiting ring is fixedly provided on the outer circumference of the pin rod 69. A push rod 66 is installed on the upper half of the yoke plate 65 and the second coil frame 63 at the position of the through hole. A second limiting ring is fixedly provided on the outer circumference of the push rod 66 above the yoke plate 65. A spring 67 is wound around the outer surface between the limiting ring and the yoke plate 65 to support and assist the sliding of the push rod 66. One end of the push rod 66 located in the through hole is set into a conical shape, and a pin groove is opened in the middle of the conical end for positioning and connection with the pin rod 69. In addition, the diameter of the pin groove is smaller than the diameter of the first limiting ring, so the first limiting ring is also supported and connected to the bottom of the push rod 66. The bottom of the pin rod 69 is limited and installed in the first mounting groove 11. The arrangement of the first limiting ring, the second limiting ring and the spring 67 realizes the stable movement and solid support of the push rod 66 along the height direction. The locking structure 6 includes an unlocked state and a locked state. The locked state includes a series locking state and a parallel locking state. Specifically, when in the unlocked state, the second coil 64 is energized to generate a magnetic field, magnetizing the push rod 66 and causing the push rod 66 and the magnetic cylinder 68 to attract each other with opposite polarities and move the push rod 66 downward. The spring 67 is compressed, and the locking structure 6 is in the unlocked state. Similarly, when in the locked state, the second coil 64 is de-energized, the magnetic field disappears, the electromagnetic attraction between the push rod 66 and the magnetic cylinder 68 is released, and the originally compressed spring 67, under the action of the rebound force, drives the push rod 66 to return to the original locked position. At this locked position, the top of the push rod 66 abuts against one side of the abutment block 57, thus forming the locked state of the rotary switching structure 5, thereby solving the failure mode of the magnetic latching relay and improving the reliability of the magnetic latching relay contact state.

[0027] In this embodiment, when switching between the series and parallel states of the magnetic latching relay, the locking structure 6 enters the unlocked state. A positive drive signal is transmitted through the PIN pin 44, the first coil 41 receives a positive pulse current, and the right end of the armature 55 is attracted to the yoke 43 located on the right side, pushing the second push block 59 to form. Figure 7 In the parallel state of contact between the contacts in b, the locking structure 6 immediately enters the locked state, and the stability of the parallel state of the magnetic latching relay is improved by the mutual support between the hardware structures. Similarly, when the magnetic latching relay switches from a parallel state to a series state under contact, the locking structure 6 first enters the unlocked state, and then transmits a reverse drive signal through the PIN pin 44. The first coil 41 receives a reverse pulse current, and the left end of the armature 55 is attracted to the yoke 43 located on the left. The first push block 58 connects the moving contacts of the first series assembly 72 and the second series assembly 73, forming... Figure 7 In the series state of contact at point a, the locking structure 6 then re-enters the locked state, thereby improving the stability of the series state of the magnetic latching relay. The locking mechanism 6 is preferably an electromagnetic direct-acting structure, driven by a separate coil. This direct-acting structure is simple, low-cost, highly producible, and less susceptible to adverse conditions such as external mechanical forces, effectively solving the problem of magnetic latching relay failure.

[0028] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features, and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A magnetic latching relay with a locking structure, comprising a housing (1), wherein the housing (1) is a box structure and is divided into a length direction, a width direction and a height direction, characterized in that: The interior of the outer shell (1) is provided with a contact structure (7), a rotation switching structure (5), a coil structure (4) and a locking structure (6) in sequence along the length direction. The rotary switching structure (5) includes a rotary plate (52), and an abutment block (57) is integrally formed on the lower surface edge of the rotary plate (52). The abutment block (57) is located above the locking structure (6), and the locking structure (6) is used to help maintain the contact state of the magnetic latching relay. The locking structure (6) includes a locking yoke (62), which is U-shaped with a U-shaped groove in the middle. A second coil frame (63) is installed inside the U-shaped groove of the locking yoke (62). The second coil frame (63) is I-shaped, and a second coil (64) is sleeved in the middle of the second coil frame (63). A yoke plate (65) abuts against the top of the second coil frame (63) near the abutting block (57). The yoke plate (65) is engaged with the top sides of the locking yoke (62). The locking yoke (62) and the second coil frame (64) are connected. 63) A through hole is provided in the middle of the yoke plate (65) along the height direction. A magnetic cylinder (68) is installed on the lower half of the locking yoke (62) and the second coil frame (63) at the through hole. A push rod (66) is installed on the upper half of the yoke plate (65) and the second coil frame (63) at the position of the through hole. A second limiting ring is fixedly provided on the outer surface of the push rod (66) above the yoke plate (65). A spring (67) is wound on the outer surface of the push rod (66) between the second limiting ring and the yoke plate (65).

2. A magnetic latching relay with a locking structure according to claim 1, characterized in that: The magnetic cylinder (68) is equipped with a pin rod (69) inside. A first limiting ring is fixedly provided on the outer surface of the pin rod (69). The end of the push rod (66) located in the through hole is set as a cone shape and a pin groove is opened in the middle of the cone-shaped end. The diameter of the pin groove is smaller than the diameter of the first limiting ring.

3. A magnetic latching relay with a locking structure according to claim 1, characterized in that: The locking structure (6) includes an unlocked state and a locked state. When it is in the unlocked state, the second coil (64) is energized to generate a magnetic field, magnetizes the push rod (66), and causes the push rod (66) and the magnetic cylinder (68) to attract each other with opposite polarities and the push rod (66) moves downward. The spring (67) is compressed, and the locking structure (6) is in the unlocked state. When it is in the locked state, the second coil (64) is de-energized, the magnetic field disappears, the electromagnetic attraction between the push rod (66) and the magnetic cylinder (68) is released, and the originally compressed spring (67) is driven by the rebound force to return the push rod (66) to the original locked position. At this locked position, the top of the push rod (66) abuts against one side of the abutment block (57) to form the locked state of the rotation switching structure (5).

4. A magnetic latching relay with a locking structure according to claim 1, characterized in that: The outer shell (1) has two interconnected cavities, one and the other.

5. A magnetic latching relay with a locking structure according to claim 1, characterized in that: The outer shell (1) is provided with a welding copper busbar (3), which is configured as four groups. The four groups of welding copper busbars (3) are respectively connected to a first stationary terminal (31), a first moving terminal (32), a second moving terminal (33), and a second stationary terminal (34). The first stationary terminal (31), the first moving terminal (32), the second moving terminal (33), and the second stationary terminal (34) are staggered along the length direction of the outer shell (1). The first stationary terminal (31) and the second moving terminal (33) are located on the same side of the inner wall of the outer shell (1), and the first moving terminal (32) and the second stationary terminal (34) are located on the other side of the inner wall of the outer shell (1).

6. A magnetic latching relay with a locking structure according to claim 5, characterized in that: The contact structure (7) includes a first parallel component (71), a first series component (72), a second series component (73), and a second parallel component (74). One end of the first parallel component (71), the first series component (72), the second series component (73), and the second parallel component (74) are respectively connected to the first stationary terminal (31), the first moving terminal (32), the second moving terminal (33), and the second stationary terminal (34).

7. A magnetic latching relay with a locking structure according to claim 6, characterized in that: The first parallel assembly (71) and the second parallel assembly (74) have the same structure but opposite directions. The first parallel assembly (71) includes several sets of first moving spring plates (711). The first moving spring plates (711) are connected to first moving contacts (713) on both sides respectively. The first moving contact (713) on the side adjacent to the first stationary terminal (31) is installed through the first stationary terminal (31). The first moving contact (713) on the side away from the first stationary terminal (31) passes through the first moving spring plate (711) and is fixedly connected to the first fixed connecting piece (712).

8. A magnetic latching relay with a locking structure according to claim 7, characterized in that: The first series assembly (72) and the second series assembly (73) have the same structure but opposite directions. The first series assembly (72) includes several sets of second moving spring plates (721). The two sides of the second moving spring plate (721) are respectively connected to second moving contacts (723). The second moving contact (723) on the side adjacent to the first moving terminal (32) is installed through the first moving terminal (32). The second moving contact (723) on the side away from the first moving terminal (32) passes through the second moving spring plate (721) and is fixedly connected to a second fixed connecting piece (722).

9. A magnetic latching relay with a locking structure according to claim 8, characterized in that: The coil structure (4) includes a first coil (41), and the two ends of the first coil (41) are supported and connected to a first coil frame (42). The side of the first coil frame (42) away from the first coil (41) is supported and connected to a yoke (43). The yoke (43) is L-shaped, and a pin (44) is installed on the top of the first coil frame (42).

10. A magnetic latching relay with a locking structure according to claim 9, characterized in that: The rotating switching structure (5) includes a fixed seat (51) located above the yoke (43). The yoke (43) has a protrusion on its surface facing the fixed seat (51). The fixed seat (51) has a positioning groove 1 in the middle of its surface that matches the shape and position of the protrusion. The fixed seat (51) has positioning grooves 2 on both sides that match the top shape and position of the first coil frame (42). The fixed seat (51) is engaged with the yoke (43) and the first coil frame (42) through the positioning grooves 1 and 2 respectively. The rotating plate (52) has a rotating central shaft (53) connected through its middle side facing the contact structure (7). The rotating plate (52) has rotating side shafts (56) integrally connected on both sides of the rotating central shaft (53). The two rotating side shafts (56) are connected to a first pushing block (58) and a second pushing block (59) respectively. The surfaces of the first pushing block (58) and the second pushing block (59) have pushing grooves. The rotating plate (52) has a movable yoke (54) and an armature (55) arranged parallel to each other along the height direction inside. The two sides of the movable yoke (54) and the armature (55) are respectively protruding from the corresponding sides of the rotating plate (52). A rotating shaft magnet is installed inside the rotating plate (52) located between the movable yoke (54) and the armature (55).

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