Magnetic circuit part of relay and relay

Abstract

The utility model relates to a magnetic circuit part of a relay and the relay, the magnetic circuit part of the relay comprises a yoke assembly, the yoke assembly encloses to form an accommodating space, the accommodating space is used for arranging a coil assembly with a mounting hole, a movable iron core is located in the mounting hole and comprises a first convex ring part, and a first static iron core is located in the mounting hole and comprises a second convex ring part; at least part of the structure of the first static iron core is located in the space defined by the first convex ring part, magnetic lines can be conducted between the first static iron core and the inner side wall of the first convex ring part, and magnetic lines can be conducted between the first static iron core and the yoke assembly. According to the magnetic circuit part of the relay and the relay, the power requirement of the movable iron core can be met, and meanwhile miniaturization and light weight are achieved.

Description

Technical Field

[0001] This application relates to the field of relay technology, and in particular to the magnetic circuit part of a relay and the relay itself. Background Technology

[0002] As an electronic control device, a relay has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is commonly used in automatic control circuits and is essentially 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. Solenoid relays are a type of relay capable of handling high power. Even under harsh conditions such as high voltage and high current, they possess reliability and long service life unmatched by conventional relays, and are widely used in various fields, such as new energy vehicles.

[0003] In related technologies, the stationary iron core and the moving iron core are arranged opposite each other along the direction of movement of the moving iron core. When the coil is energized, magnetic lines of force are conducted between the stationary and moving iron cores, causing the moving iron core to move relative to the stationary iron core in the electromagnetic field. In related technologies, in order for the moving iron core to obtain sufficient electromagnetic power, it is necessary to use a larger moving and stationary iron core, or to wind a coil with more turns.

[0004] However, using larger moving and stationary iron cores, or winding more coils, will result in a larger structure and will not be conducive to weight reduction. Utility Model Content

[0005] Therefore, it is necessary to provide a magnetic circuit component and a relay to address the issue of how to simultaneously meet the power requirements of the moving iron core while achieving miniaturization and weight reduction.

[0006] On one hand, this application provides a magnetic circuit portion of a relay, the magnetic circuit portion comprising:

[0007] A yoke assembly, wherein the yoke assembly encloses and forms a receiving space, the receiving space being used to house a coil assembly having mounting holes, and the yoke assembly having through holes for inserting a push rod;

[0008] A moving iron core is located in the mounting hole. The moving iron core is used to drive the push rod to move axially relative to the yoke assembly. The moving iron core includes a first convex ring portion, which is arranged axially around the push rod.

[0009] A first stationary iron core is located inside the mounting hole. At least a portion of the structure of the first stationary iron core is located within the space enclosed by the first convex ring. Magnetic lines of force can be conducted between the first stationary iron core and the inner wall of the first convex ring, and magnetic lines of force can be conducted between the first stationary iron core and the yoke assembly.

[0010] In the magnetic circuit of the aforementioned relay, at least a portion of the structure of the first stationary iron core is located within the space enclosed by the first convex ring. Furthermore, the first stationary iron core can conduct magnetic lines of force between the yoke assembly and the moving iron core. This allows the first stationary iron core to stably conduct magnetism between the yoke assembly and the moving iron core during movement, ensuring that the first stationary iron core, the moving iron core, and the yoke assembly form a closed magnetic circuit. Consequently, when the coil assembly is energized, it can maintain the magnetic force that drives the push rod to move axially along the moving iron core, as well as the holding force after the movement is completed. In addition, with this structural design, a portion of the structure of the first stationary iron core is housed within the moving iron core, reducing the space occupied by the moving iron core and increasing the winding space of the coil, thus facilitating miniaturization. Moreover, by providing the space enclosed by the first convex ring to house the first stationary iron core, it is equivalent to hollowing out a portion of the moving iron core's structure, thereby reducing the weight of the moving iron core and achieving lightweight design. Thus, the magnetic circuit of this application can simultaneously meet the power requirements of the moving iron core while achieving miniaturization and lightweight design.

[0011] In one embodiment, the inner wall of the mounting hole can guide the moving iron core to move relative to the yoke assembly along the axial direction of the push rod, thereby improving the motion stability of the moving iron core.

[0012] In one embodiment, the inner wall of the mounting hole forms a gap axially around the push rod. This gap is formed around the moving iron core and the first stationary iron core, and the non-magnetic structure of the relay is located outside the gap. This arrangement avoids the non-magnetic structure occupying the gap around the moving iron core and the first stationary iron core, thereby minimizing the gap or utilizing it to install a magnetic structure to increase the electromagnetic force of the moving iron core, thus reducing the number of coil turns. This, in turn, helps to reduce the size of the relay and achieve miniaturization.

[0013] In one embodiment, the magnetic circuit portion of the relay further includes a magnetic guide cylinder disposed within the gap. At least a portion of the structure of the moving iron core and at least a portion of the structure of the first stationary iron core are located within the magnetic guide cylinder. The magnetic guide cylinder is used to converge the magnetic lines of force generated by the energized coil assembly to the periphery of the first stationary iron core. In this embodiment, the magnetic guide cylinder can be used to converge the magnetic lines of force generated by the energized coil to the periphery of the first stationary iron core, thereby facilitating the conduction of the magnetic lines of force from the first stationary iron core to the moving iron core.

[0014] In one embodiment, the first stationary iron core includes a main body and a protrusion connected to each other. A portion of the main body is housed within the space enclosed by the first convex ring. Magnetic lines of force can be conducted between the peripheral sidewall of the main body and the inner sidewall of the first convex ring. The protrusion protrudes from the end face of the main body facing away from the moving iron core. Magnetic lines of force can be conducted between the protrusion and the yoke assembly. Thus, the protrusion conducts magnetic lines of force between the main body and the yoke assembly, enabling the entire first stationary iron core to conduct magnetic lines of force between the yoke assembly and the moving iron core.

[0015] In one embodiment, the main body has a first recess at one end facing the moving iron core, and at least a portion of the moving iron core is housed within the first recess. This arrangement improves the tightness of the fit between the moving iron core and the first stationary iron core, thereby reducing the overall size of the relay and facilitating weight reduction.

[0016] In one embodiment, the moving iron core includes a connecting portion for connecting the push rod, and at least a portion of the connecting portion is housed within the first recess. In this embodiment, by utilizing the first recess to house at least a portion of the connecting portion, the moving iron core and the first stationary iron core achieve a more compact structure while ensuring magnetic conductivity, thereby reducing the overall size of the relay and facilitating weight reduction.

[0017] In one embodiment, the moving iron core includes a second convex ring portion, a portion of which is housed within the first recessed portion. Thus, the first and second convex ring portions are complementaryly embedded with the main body, further enhancing the guiding effect of the first stationary iron core on the moving iron core, thereby improving the motion stability of the moving iron core in the electromagnetic field generated by the coil.

[0018] In one embodiment, the first stationary iron core further includes a limiting portion, which is arranged around the periphery of the main body. The peripheral sidewall of the main body and the end face of the limiting portion facing the main body form a second recess, and a portion of the structure of the first convex ring is housed in the second recess. In this embodiment, the limiting portion increases the volume of the first stationary iron core, thereby increasing the surface area of ​​the yoke assembly for transmitting magnetic lines of force to the first stationary iron core. The magnetic lines of force eventually converge at the main body and are transmitted to the moving iron core through the main body. Therefore, this structural arrangement increases the number of magnetic lines of force transmitted from the yoke assembly to the moving iron core by the first stationary iron core, i.e., increases the magnetic flux of the moving iron core, which helps the moving iron core generate a larger electromagnetic force. Since a portion of the structure of the first convex ring is housed in the second recess, this structural arrangement results in a compact fit between the first stationary iron core and the moving iron core, thus maintaining the miniaturization of the relay.

[0019] In one embodiment, the first stationary iron core includes a main body and a protrusion. The protrusion protrudes from the end face of the main body facing away from the moving iron core. The magnetic circuit portion further includes a magnetizing element with a through hole. The magnetizing element is sleeved on the protrusion, and the inner wall of the through hole contacts the peripheral sidewall of the protrusion. The yoke assembly includes a first wall and a second wall disposed opposite to each other. The through hole is located on the first wall, and magnetic lines of force can be conducted between the magnetizing element and the second wall. On the one hand, the magnetizing element enhances the magnetic flux conducted from the second wall to the first stationary iron core by converging the magnetic lines of force. On the other hand, when the first stationary iron core is assembled to the second wall, the magnetizing element can absorb assembly stress between the first stationary iron core and the second wall, thereby improving the connection stability between the first stationary iron core and the second wall.

[0020] On the other hand, this application provides a relay that includes the magnetic circuit portion of the relay as described above. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a relay in one embodiment.

[0022] Figure 2 for Figure 1 The diagram shows an exploded view of the relay.

[0023] Figure 3 This is a cross-sectional view of a relay in one embodiment.

[0024] Figure 4 This is a cross-sectional view of the relay in another embodiment.

[0025] Figure 5 This is a cross-sectional view of the relay in another embodiment.

[0026] Figure 6 This is a cross-sectional view of the relay in another embodiment.

[0027] Figure 7 This is a cross-sectional view of a relay according to another embodiment.

[0028] Figure 8 This is a schematic diagram of the magnetic field conduction of the magnetic circuit portion of a relay according to one embodiment.

[0029] Figure 9 This is a cross-sectional schematic diagram of a relay according to another embodiment of this application.

[0030] Figure 10 This is a cross-sectional schematic diagram of a relay according to another embodiment of this application.

[0031] Figure 11 This is a cross-sectional schematic diagram of a relay according to another embodiment of this application.

[0032] Figure 12 This is a cross-sectional view of a relay according to one embodiment of the present application when it is equipped with a magnetizing element.

[0033] Figure 13 This is a cross-sectional view of a relay with a magnetizing element according to another embodiment of this application.

[0034] Figure 14 This is a cross-sectional view of a relay with a magnetizing element, which is another embodiment of this application.

[0035] Figure 15 This is a cross-sectional schematic diagram of a relay according to another embodiment of this application.

[0036] Figure label:

[0037] 100. Relay; 10. Contact part; 11. Stationary contact; 12. Moving contact; 20. Pushing mechanism; 21. Pushing base; 22. Pushing rod; 30. Magnetic circuit part; 31. Yoke assembly; 31a. First wall; 31b. Second wall; 31c. Through hole; 31d. Socket; 31e. Sleeve; 311. Yoke plate; 312. U-shaped yoke; 32. Moving iron core; 321. First convex ring; 322. Second convex ring; 323. Connection Part; 33, First stationary iron core; 331, First recessed part; 332, Second recessed part; 33a, Main body part; 33b, Protrusion part; 33c, Limiting part; 35, Return spring; 36, Second stationary iron core; 361, Supporting part; 37, Magnetic guide cylinder; 38, Magnetizing component; 38a, Through hole; 381, Collar ring; 382, ​​Protruding edge; 40, Coil assembly; 40a, Mounting hole; 41, Coil; 42, Coil frame; Mounting hole; 50, Insulating cover. Detailed Implementation

[0038] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0039] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms 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 application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0040] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0044] Combination Figure 1 and Figure 2 As shown, this application provides a relay 100 that can be applied in automatic control circuits.

[0045] The relay 100 includes a contact portion 10, an actuation mechanism 20, and a magnetic circuit portion 30.

[0046] The contact portion 10 includes a stationary contact 11 and a moving contact 12. There can be two stationary contacts 11, with each end of the moving contact 12 corresponding to one of the two stationary contacts 11. The moving contact 12 can move closer to or further away from the stationary contacts 11 under the drive of the pushing mechanism 20, so that when the moving contact 12 is in contact with the stationary contacts 11, they are electrically connected, and when they are separated, they are electrically disconnected.

[0047] The pushing mechanism 20 includes a pushing seat 21 and a pushing rod 22 connected to each other. The moving contact 12 is disposed on the pushing seat 21. The pushing rod 22 is used to move the pushing seat 21 closer to or away from the stationary contact 11 when it moves, so that the moving contact 12 on the pushing seat 21 comes into contact with or separates from the stationary contact 11, thereby achieving the purpose of electrically connecting or disconnecting the moving contact 12 from the stationary contact 11, so as to meet the need to connect or disconnect the automatic control circuit connected to the relay 100.

[0048] The magnetic circuit section 30 also includes a coil assembly 40 with a mounting hole 40a. The coil assembly 40 includes a coil 41, which generates an electromagnetic field when energized. The magnetic circuit section 30 provides magnetic conductivity and, under the influence of the electromagnetic field generated by the coil 41, drives the push rod 22 to move, thereby bringing the moving contact 12 on the push base 21 into contact with the stationary contact 11. Thus, the opening and closing of the relay 100 can be controlled by energizing the coil 41, enabling the relay 100 to conduct or disconnect the automatic control circuit it is connected to; that is, the relay 100 acts as a "switch" in the automatic control circuit.

[0049] Continue to combine Figure 1 and Figure 2 As shown, the magnetic circuit section 30 includes a yoke assembly 31, a moving iron core 32, and a first stationary iron core 33.

[0050] The yoke assembly 31 is arranged to enclose the space. The moving iron core 32, the first stationary iron core 33, and the coil 41 are all located within the space enclosed by the yoke assembly 31.

[0051] The yoke assembly 31 has a through hole 31c for the push rod 22 to pass through. Specifically, one end of the push rod 22 is connected to the push seat 21, and the other end passes through the through hole 31c into the space enclosed by the yoke assembly 31 so as to connect with the moving iron core 32 located inside the yoke assembly 31. The moving iron core 32 is used to drive the push rod 22 to move axially relative to the yoke assembly 31, thereby causing the push rod 22 to move the push seat 21 closer to or away from the stationary contact 11, so that the moving contact piece 12 on the push seat 21 contacts or separates from the stationary contact 11.

[0052] The moving iron core 32 is located in the mounting hole 40a. When the coil 41 is energized, the electromagnetic field generated causes the moving iron core 32 to be magnetized and attracted to the side wall of the yoke assembly 31 near the moving contact 12. In this way, the moving iron core 32 drives the push seat 21 to move toward the stationary contact 11 via the push rod 22, so that the moving contact 12 on the push seat 21 comes into contact with the stationary contact 11.

[0053] In some embodiments, the yoke assembly 31 includes a yoke plate 311 and a U-shaped yoke 312, with a through hole 31c provided in the yoke plate 311. The yoke plate 311 is connected to both ends of the U-shaped yoke 312, and the through hole 31c is provided in the yoke plate 311. The push seat 21 is located on the side of the yoke plate 311 facing away from the moving iron core 32. The end of the push rod 22 away from the moving contact piece 12 passes through the yoke plate 311 and is connected to the moving iron core 32. In this embodiment, the push rod 22 passes through the through hole 31c of the yoke plate 311, and the push seat 21 and the moving iron core 32, which are connected to both ends of the push rod 22, are located on both sides of the yoke plate 311.

[0054] Furthermore, a return spring 35 is provided between the yoke plate 311 and the moving iron core 32.

[0055] When coil 41 is energized, the moving iron core 32 is magnetized and attracts the yoke plate 311. Therefore, the moving iron core 32 overcomes the elastic force of the return spring 35 and moves towards the yoke plate 311, thereby pushing rod 22 to drive push seat 21 towards the stationary contact 11, causing the moving contact piece 12 on push seat 21 to contact the two stationary contacts 11. In this way, the moving contact piece 12 can be used to conduct the electrical connection between the two stationary contacts 11.

[0056] When the coil 41 is de-energized, the moving iron core 32 moves away from the yoke plate 311 under the drive of the return spring 35. In this way, the moving iron core 32 moves the push seat 21 away from the stationary contact 11 via the push rod 22, so that the moving contact piece 12 is separated from the two stationary contacts 11, thereby breaking the electrical contact.

[0057] It should be noted that the through hole 31c is not limited to being provided on the yoke plate 311. For example, the through hole 31c may not be provided on the yoke plate 311, but may be provided on the U-shaped yoke 312. In this case, the side wall of the U-shaped yoke 312 with the through hole 31c can be positioned facing the side where the stationary contact 11 is located. Since the yoke plate 311 connects the two ends of the U-shaped yoke 312, the yoke plate 311 is positioned on the side of the U-shaped yoke 312 facing away from the stationary contact 11. In this embodiment, the space enclosed by the yoke plate 311 and the U-shaped yoke 312 can still meet the assembly and functional requirements of other structures of the relay 100.

[0058] The structure of the yoke assembly 31 can be implemented in various ways, and is not limited to the above-mentioned yoke assembly 31, which includes yoke plate 311 and U-shaped yoke 312.

[0059] For example, in some embodiments, the yoke assembly 31 includes a first yoke plate, a second yoke plate, and two side yoke plates. The two side yoke plates are spaced apart from each other and are both connected between the first yoke plate and the second yoke plate, thus forming a closed ring structure with the first yoke plate, the second yoke plate, and the two side yoke plates. In this embodiment, the through hole 31c is provided on either the first yoke plate or the second yoke plate, as long as the through hole 31c can accommodate the insertion of the push rod 22.

[0060] For example, in some embodiments, the yoke assembly 31 can be a single structural component. Specifically, the yoke assembly 31 includes a single-piece closed yoke ring. The closed yoke ring can be formed by bending a metal sheet or by casting, and there is no limitation on this.

[0061] Combination Figure 2 and Figure 3 As shown, for ease of description, the sidewall of the yoke assembly 31 with the through hole 31c is referred to as the "first wall 31a", and correspondingly, the side plate of the yoke assembly 31 opposite to the first wall 31a is referred to as the "second wall 31b". That is, the yoke assembly 31 includes the first wall 31a and the second wall 31b opposite to each other, and the through hole 31c is located on the first wall 31a. In this embodiment, the first stationary iron core 33 is magnetically engaged with the second wall 31b, thereby conducting the magnetic lines of force of the yoke assembly 31 to the first stationary iron core 33 at the second wall 31b, so that the first stationary iron core 33 conducts the magnetic lines of force to the moving iron core 32, so that the moving iron core 32 is magnetized.

[0062] by Figure 2 and Figure 3Taking the relay 100 shown as an example, the yoke assembly 31 includes a yoke plate 311 and a U-shaped yoke 312. A through hole 31c is provided on the yoke plate 311. The yoke plate 311 can be called the "first wall 31a" of the yoke assembly 31, and the side wall of the U-shaped yoke 312 opposite to the yoke plate 311 can be called the "second wall 31b" of the yoke assembly 31.

[0063] In some embodiments, the coil assembly 40 further includes a coil frame 42, which has a mounting hole 40a in its middle. The two ends of the coil frame 42 abut against a first wall 31a and a second wall 31b, respectively, so that the wall of the mounting hole 40a encloses the first wall 31a and the second wall 31b to form an assembly space. Structures such as the moving iron core 32 and the first stationary iron core 33 are disposed within this assembly space. In this embodiment, the mounting hole 40a is used to enclose the assembly space between the first wall 31a and the second wall 31b to accommodate the installation needs of structures such as the moving iron core 32 and the first stationary iron core 33.

[0064] The coil 41 is wound around the coil frame 42 to surround the moving iron core 32 and the first stationary iron core 33 located in the mounting hole 40a. When the coil 41 is energized, the moving iron core 32 and the first stationary iron core 33 conduct magnetism between the first wall 31a and the second wall 31b of the yoke assembly 31, causing the moving iron core 32 to be magnetized and magnetically attracted to the first wall 31a. Thus, the moving iron core 32, via the push rod 22, drives the push seat 21 to move towards the side where the stationary contact 11 is located, to meet the need for the push seat 21 to bring the moving contact piece 12 into contact with the stationary contact 11.

[0065] It should be noted that the parts of relay 100 not covered may be the same as or may be implemented using existing technology, and are not limited here.

[0066] For example, such as Figure 2 and Figure 3 As shown, in some embodiments, the relay 100 further includes an insulating cover 50, which is disposed above the yoke plate 311. Two stationary contacts 11 are respectively disposed through the top wall of the insulating cover 50, and the moving contact 12 and the push base 21 are connected and both are disposed inside the insulating cover 50. Since the push rod 22 passes through the through hole 31c and is connected between the push base 21 and the moving iron core 32, the push rod 22 can transmit the power of the moving iron core 32 moving in the mounting hole 40a of the coil frame 42 to the push base 21, so that the push base 21, carrying the moving contact 12, contacts or separates from the two stationary contacts 11.

[0067] Combination Figure 3 As shown, the moving iron core 32 is located in the mounting hole 40a. The moving iron core 32 includes a first convex ring portion 321, which is axially arranged around the push rod 22.

[0068] The first stationary iron core 33 is located within the mounting hole 40a. At least a portion of the structure of the first stationary iron core 33 is located within the space enclosed by the first convex ring portion 321, and magnetic lines of force can be conducted between the first stationary iron core 33 and the inner wall of the first convex ring portion 321. Magnetic lines of force can also be conducted between the first stationary iron core 33 and the yoke assembly 31.

[0069] In this embodiment, magnetic lines of force can be conducted between the first stationary iron core 33 and the inner wall of the first convex ring portion 321, and magnetic lines of force can also be conducted between the first stationary iron core 33 and the yoke assembly 31. Therefore, the first stationary iron core 33 can play the role of conducting magnetic lines of force between the inner wall of the first convex ring portion 321 and the yoke assembly 31. This allows the first stationary iron core 33 to stably conduct magnetism between the yoke assembly 31 and the moving iron core 32 during the movement of the moving iron core 32, ensuring that the first stationary iron core 33, the moving iron core 32, and the yoke assembly 31 form a closed magnetic circuit. Consequently, when the coil assembly 40 is energized, it can maintain the magnetic force that drives the push rod 22 to move axially along the moving iron core 32, as well as the holding force after the movement is completed.

[0070] Furthermore, in this structural design, part of the first stationary iron core 33 is housed within the moving iron core 32, reducing the space occupied by the moving iron core 32 and increasing the winding space of the coil 41, thus facilitating miniaturization. Additionally, the moving iron core 32 encloses the space by providing a first protruding ring 321 to house the first stationary iron core 33, effectively hollowing out part of the moving iron core 32's structure, thereby reducing its weight and achieving lightweighting. Thus, the magnetic circuit portion 30 of this application can simultaneously meet the power requirements of the moving iron core 32 while achieving miniaturization and lightweighting.

[0071] It should be noted that the mating method between the moving iron core 32 and the mounting hole 40a includes, but is not limited to, clearance fit.

[0072] In some embodiments, the inner wall of the mounting hole 40a can guide the moving iron core 32 to move relative to the yoke assembly 31 along the axial direction of the push rod 22. In this way, the inner wall of the mounting hole 40a can guide the movement of the moving iron core 32, thereby improving the movement stability of the moving iron core 32.

[0073] The inner wall of the mounting hole 40a can be in clearance fit with the peripheral side wall of the moving iron core 32, that is, there is a small assembly gap between the two. Because the assembly gap is small, if the moving iron core 32 deviates from the direction of movement and comes into contact with the inner wall of the mounting hole 40a during the movement, the inner wall of the mounting hole 40a will limit the deflection angle of the moving iron core 32 from the direction of movement, so the inner wall of the mounting hole 40a can play a guiding role.

[0074] The assembly clearance between the inner wall of the mounting hole 40a and the peripheral side wall of the moving iron core 32 is not limited here.

[0075] In other embodiments, the inner wall of the mounting hole 40a forms a gap in the axial direction around the push rod 22, the gap being formed on the periphery of the moving iron core 32 and the first stationary iron core 33, with the non-magnetic structure of the relay 100 located outside the gap.

[0076] It should be noted that the non-magnetic structure can be considered as a structure that does not possess magnetic properties. This avoids the non-magnetic structure occupying the gaps around the moving iron core 32 and the first stationary iron core 33, thus minimizing these gaps or utilizing them to install magnetic structures to increase the electromagnetic force of the moving iron core 32, thereby reducing the number of turns in the coil 41. This, in turn, helps to reduce the size of the relay 100 and achieve miniaturization.

[0077] In the embodiments of this application, the ability to conduct magnetic field lines between two objects indicates that one object can transmit magnetic field lines to the other object. The ways in which magnetic field lines can be conducted between two objects include, but are not limited to, direct contact between the two objects or magnetic conduction between the two objects through a magnetically conductive structure or a magnetically conductive gap.

[0078] Taking the conduction of magnetic field lines between the first stationary iron core 33 and the yoke assembly 31 as an example, the first stationary iron core 33 can achieve magnetic conduction between the two by contacting the yoke assembly 31. In some embodiments, there may also be a magnetically conductive gap between the first stationary iron core 33 and the yoke assembly 31. Whether the magnetically conductive gap is filled with air or other magnetically conductive media, it is acceptable as long as the gap between the first stationary iron core 33 and the yoke assembly 31 meets the magnetic conduction requirements.

[0079] It should be noted that, under the magnetization effect of the electromagnetic field generated by the energization of the coil 41, the moving iron core 32 can not only drive the push rod 22 to move toward the side where the stationary contact 11 is located by adsorbing the yoke plate 311, but also enhance the magnetic adsorption force by setting an iron core on the yoke plate 311.

[0080] For example, combining Figure 4 As shown, in some embodiments, the magnetic circuit portion 30 of the relay 100 further includes a second stationary iron core 36, which is located on the side of the moving iron core 32 opposite to the first stationary iron core 33.

[0081] Furthermore, a reset spring 35 is provided on the side of the moving iron core 32 facing away from the first stationary iron core 33. The reset spring 35 is used to push the moving iron core 32 toward the first stationary iron core 33 to reset when the coil assembly 40 is de-energized.

[0082] In some embodiments, the second stationary iron core 36 is connected to the first wall 31a. Thus, the moving iron core 32 can increase the magnetic force moving towards the first wall 31a by attracting the second stationary iron core 36, so as to provide a greater driving force for the axial movement of the push rod 22.

[0083] Continue reading Figure 4 As shown, in this embodiment, the return spring 35 may be disposed between the second stationary iron core 36 and the moving iron core 32. For example, the second stationary iron core 36 is provided with a supporting portion 361, which is used to elastically engage with the moving iron core 32 via the return spring 35. The push rod 22 passes through the return spring 35 and the supporting portion 361. Thus, when the coil 41 is energized, the moving iron core 32 is magnetized and attracts the second stationary iron core 36, causing the push rod 22 to move towards the side where the stationary contact 11 is located, thereby enabling the moving contact piece 12 on the push seat 21 to contact the stationary contact 11. When the energization of the coil 41 is disconnected, the moving iron core 32 loses its magnetism or its magnetic force weakens, and the elastic force of the return spring 35 drives the moving iron core 32 to return to its original position, that is, the moving iron core 32 moves away from the second stationary iron core 36, thereby causing the push rod 22 to move towards the first wall 31a with the push seat 21. Thus, the moving contact 12 on the push seat 21 moves away from the stationary contact 11.

[0084] Combination Figure 5 As shown, in some embodiments, the magnetic circuit portion 30 of the relay 100 further includes a magnetic guide cylinder 37. The magnetic guide cylinder 37 is disposed within the gap, that is, within the mounting hole 40a, and on the outer periphery of the first stationary iron core 33 and the moving iron core 32. At least a portion of the structure of the moving iron core 32 and at least a portion of the structure of the first stationary iron core 33 are located within the magnetic guide cylinder 37. In this embodiment, the magnetic guide cylinder 37 can be used to concentrate the magnetic lines of force generated by the energization of the coil 41 to the periphery of the first stationary iron core 33, thereby facilitating the conduction of the magnetic lines of force from the first stationary iron core 33 to the moving iron core 32.

[0085] It should be noted that magnetic lines of force can be conducted between one end of the magnetic cylinder 37 and the yoke assembly 31. For example, in some embodiments, magnetic lines of force can be conducted between the magnetic cylinder 37 and the second wall 31b, so that the magnetic lines of force in the second wall 31b can be conducted to the magnetic cylinder 37, thereby concentrating the magnetic lines of force on the periphery of the first stationary iron core 33.

[0086] The structure of the first stationary iron core 33 and the moving iron core 32, as well as the method of transmitting magnetic field lines between them, are not specified here.

[0087] In some implementations, continue to combine Figure 4 and Figure 5 As shown, the first stationary iron core 33 includes a main body portion 33a and a protrusion portion 33b connected to each other. Part of the structure of the main body portion 33a is housed within the space enclosed by the first convex ring portion 321. Magnetic lines of force can be conducted between the peripheral sidewall of the main body portion 33a and the inner sidewall of the first convex ring portion 321. The protrusion portion 33b protrudes from the end face of the main body portion 33a facing away from the moving iron core 32.

[0088] Magnetic lines of force can be conducted between the protrusion 33b and the yoke assembly 31. For example, in some embodiments, magnetic lines of force can be conducted between the protrusion 33b and the second wall 31b. That is, when the coil 41 is energized to generate an electromagnetic field, the magnetic lines of force in the second wall 31b can be conducted to the protrusion 33b and then to the main body 33a. Since part of the structure of the main body 33a is housed within the space enclosed by the first convex ring 321, the main body 33a can conduct magnetic lines of force to the first convex ring 321. This allows the first stationary iron core 33 to conduct the magnetic lines of force from the second wall 31b to the moving iron core 32, which in turn magnetizes the moving iron core 32 and attracts the first wall 31a or the second stationary iron core 36 located on the first wall 31a. This allows the moving iron core 32 to drive the push seat 21 closer to the stationary contact 11 via the push rod 22, so that the moving contact piece 12 on the push seat 21 can come into contact with the stationary contact 11.

[0089] It should be noted that the positions of the first stationary iron core 33 and the second stationary iron core 36 in this embodiment are possible in various ways. For ease of understanding, the positions of the first stationary iron core 33 and the second stationary iron core 36 are explained using the example of the yoke assembly 31 including the first wall 31a and the second wall 31b. In some embodiments, the first stationary iron core 33 is disposed on either the first wall 31a or the second wall 31b; that is, the first stationary iron core 33 can be disposed on either the first wall 31a or the second wall 31b. The position of the first stationary iron core 33 is not limited here, as long as the first stationary iron core 33 can conduct magnetic lines of force between the yoke assembly 31 and the moving iron core 32 to form a complete magnetic circuit.

[0090] In some embodiments, the magnetic circuit portion 30 may or may not have a second stationary iron core 36. In embodiments where the magnetic circuit portion 30 includes a second stationary iron core 36, since the second stationary iron core 36 is located on the side of the moving iron core 32 facing away from the first stationary iron core 33, and the first stationary iron core 33 may be located on the first wall 31a or the second wall 31b, the location of the second stationary iron core 36 can vary in this embodiment.

[0091] For example, the first stationary iron core 33 is disposed on the first wall 31a, and the second stationary iron core 36 is disposed on the second wall 31b. Alternatively, the first stationary iron core 33 is disposed on the second wall 31b, and the second stationary iron core 36 is disposed on the first wall 31a. Further, for the magnetic circuit portion 30 including the first stationary iron core 33 and the second stationary iron core 36, one of the first stationary iron core 33 and the second stationary iron core 36 is disposed on the first wall 31a and can conduct magnetic lines of force between the first wall 31a and the moving iron core 32; the other is disposed on the second wall 31b and can conduct magnetic lines of force between the second wall 31b and the moving iron core 32. In this way, the first stationary iron core 33 and the second stationary iron core 36, together with the moving iron core 32, conduct magnetic lines of force between the first wall 31a and the second wall 31b. Since the yoke assembly 31 itself has the effect of conducting magnetic lines of force, in this embodiment, the first stationary iron core 33, the second stationary iron core 36, the moving iron core 32 and the yoke assembly 31 form a closed magnetic circuit.

[0092] Combination Figure 6 As shown, the main body 33a has a first recess 331 at one end facing the moving iron core 32. At least a portion of the structure of the moving iron core 32 is housed in the first recess 331. This arrangement improves the tightness of the fit between the moving iron core 32 and the first stationary iron core 33, thereby reducing the overall size of the relay 100 and facilitating weight reduction.

[0093] Furthermore, the moving iron core 32 includes a connecting portion 323 for connecting the push rod 22, and at least a portion of the structure of the connecting portion 323 is located in the first recess 331. In this embodiment, the first recess 331 accommodates at least a portion of the structure of the connecting portion 323, thereby making the structure between the moving iron core 32 and the first stationary iron core 33 more compact while ensuring magnetic conductivity, thus reducing the overall size of the relay 100 and facilitating weight reduction.

[0094] It should be noted that the end of the push rod 22 connected to the connecting part 323 extends into the first recess 331. Since the connecting part 323 is connected to the push rod 22, and the push rod 22 can move axially under the drive of the moving iron core 32, the first recess 331 can provide clearance for the movement of the push rod 22, thereby preventing the push rod 22 from hitting the first stationary iron core 33, so as to improve the reliability of the movement of the push mechanism 20 under the drive of the moving iron core 32.

[0095] It should be noted that the first recess 331 is not limited to accommodating the connecting part 323 and providing clearance for the movement of the push rod 22.

[0096] For example, in some implementations, combined Figure 7As shown, the moving iron core 32 includes a second convex ring portion 322, a portion of which is housed within a first recessed portion 331. Since the first recessed portion 331 is located within the main body portion 33a, and the main body portion 33a is located within the space enclosed by the first convex ring portion 321, the second convex ring portion 322, located within the first recessed portion 331, is also located within the space enclosed by the first convex ring portion 321. Thus, the first convex ring portion 321 and the second convex ring portion 322 complement each other with the main body portion 33a, further enhancing the guiding effect of the first stationary iron core 33 on the moving iron core 32, thereby improving the motion stability of the moving iron core 32 in the electromagnetic field generated by the coil 41.

[0097] Given that both the first convex ring portion 321 and the second convex ring portion 322 are portions of the moving iron core 32 that protrude toward the first stationary iron core 33, an annular space is formed between them that surrounds the push rod 22 axially. This annular space houses the main body portion 33a, which forms the structure of the first recessed portion 331. This makes the first stationary iron core 33 and the moving iron core 32 compact, which is beneficial for miniaturization of the relay 100. This achieves miniaturization while ensuring the stability of the moving iron core 32's movement.

[0098] Furthermore, this structure also improves the magnetic permeability between the first stationary iron core 33 and the moving iron core 32. For ease of understanding, combined with... Figure 8 The magnetic circuit shown is illustrated. Specifically, as follows: Figure 8 As shown, under this structural design, when an electromagnetic field is generated by current flowing through the coil 41, the magnetic lines of force conducted from the first stationary iron core 33 to the moving iron core 32 can include two parts. One part of the magnetic lines of force is conducted from the main body 33a to the first convex ring 321, and the other part of the magnetic lines of force is conducted from the main body 33a to the second convex ring 322, thereby achieving double-sided magnetic conduction. This allows the magnetic lines of force to be conducted more efficiently from the main body 33a to the moving iron core 32, thereby enhancing the electromagnetic attraction of the moving iron core 32. Therefore, this structural design can enhance the magnetic attraction between the moving iron core 32 and the yoke plate 311 or the second stationary iron core 36 without increasing the number of turns of the coil 41 or increasing the voltage, so as to achieve miniaturization while maintaining the motion stability of the moving iron core 32.

[0099] It should be noted that the structure of the first stationary iron core 33 and the moving iron core 32 is not limited to the above-described cases.

[0100] Combination Figure 9As shown, in some embodiments, the first stationary iron core 33 further includes a limiting portion 33c, which is arranged around the periphery of the main body portion 33a. The peripheral sidewall of the main body portion 33a and the end face of the limiting portion 33c facing the main body portion 33a form a second recess 332. Part of the structure of the first convex ring portion 321 is accommodated in the second recess 332. In this embodiment, the limiting portion 33c increases the volume of the first stationary iron core 33, which helps to increase the surface area of ​​the second wall 31b conducting magnetic field lines to the first stationary iron core 33. The magnetic field lines eventually converge at the main body portion 33a and are conducted to the moving iron core 32 through the main body portion 33a. Therefore, this structural arrangement increases the number of magnetic field lines from the second wall 31b conducted by the first stationary iron core 33 to the moving iron core 32, that is, it increases the magnetic flux of the moving iron core 32, which helps the moving iron core 32 generate a larger electromagnetic force. Since part of the structure of the first convex ring 321 is housed in the second recess 332, the first stationary iron core 33 and the moving iron core 32 fit together tightly under this structural arrangement, so as to maintain the miniaturization of the relay 100.

[0101] It should be noted that, for the structure of the first stationary iron core 33, the protrusion 33b and the limiting part 33c on the main body 33a of the first stationary iron core 33 are not necessary. In other words, the protrusion 33b and the limiting part 33c can be omitted.

[0102] In some embodiments, the first stationary iron core 33 includes a main body portion 33a and a limiting portion 33c connected to each other. Part of the structure of the main body portion 33a is housed within the space enclosed by the first convex ring portion 321, and magnetic lines of force can be conducted between the peripheral sidewall of the main body portion 33a and the inner sidewall of the first convex ring portion 321; the limiting portion 33c is arranged around the periphery of the main body portion 33a and is located outside the space enclosed by the first convex ring portion 321.

[0103] In embodiments where the first stationary iron core 33 includes a main body 33a and a protrusion 33b, the protrusion 33b may mate with the wall surface of the yoke assembly 31 on the side near the moving contact 12, or it may mate with the wall surface of the yoke assembly 31 on the side away from the moving contact 12. That is, for the technical solution where the yoke assembly 31 includes a first wall 31a and a second wall 31b disposed opposite each other, and the through hole 31c is located on the first wall 31a, the protrusion 33b may mate with either the first wall 31a or the second wall 31b. For example, in some embodiments, the protrusion 33b extends into the through hole 31c. In other embodiments, the second wall 31b has an insertion hole 31d, and the protrusion 33b extends into the insertion hole 31d. Thus, the engagement of the protrusion 33b with the through hole 31c or the insertion hole 31d on the yoke assembly 31 allows magnetic lines of force to be conducted between the first stationary iron core 33 and the yoke assembly 31.

[0104] Combination Figure 10 and Figure 11 As shown, in some embodiments, a portion of the structure of the second protruding ring portion 322 is housed in the first recessed portion 331, and at least a portion of the structure of the connecting portion 323 is located in the first recessed portion 331. Thus, the first recessed portion 331 can accommodate both the first protruding ring portion 321 and the connecting portion 323 of the moving iron core 32, achieving a tight fit between the first stationary iron core 33 and the moving iron core 32 while increasing the magnetic flux of the moving iron core 32, thereby facilitating the miniaturization of the relay 100.

[0105] It should be noted that in the embodiment where the first stationary iron core 33 includes a protrusion 33b, the protrusion 33b may be in contact with the second wall 31b or there may be a magnetically conductive gap between the protrusion and the second wall 31b, as long as the second wall 31b can conduct magnetic lines of force to the protrusion 33b to meet the needs of the first stationary iron core 33 to receive magnetic lines of force.

[0106] For example, in some embodiments, the second wall 31b is provided with a socket 31d, and the protrusion 33b extends into the socket 31d. In this embodiment, the protrusion 33b extends into the socket 31d, thereby enabling the conduction of magnetic lines of force between the protrusion 33b and the second wall 31b.

[0107] Understandably, regardless of whether the first stationary iron core 33 includes the limiting part 33c, the protrusion 33b can conduct the magnetic lines of force of the second wall 31b to the main body part 33a. In this way, the main body part 33a conducts the magnetic lines of force to the protruding ring part of the moving iron core 32, thereby realizing the magnetic conduction of the first stationary iron core 33 between the second wall 31b and the moving iron core 32.

[0108] Combination Figures 12 to 14 As shown, in some embodiments, the magnetic circuit portion 30 further includes a magnetizing element 38, which has a through hole 38a. The magnetizing element 38 is sleeved on the protrusion 33b, the inner wall of the through hole 38a is in contact with the peripheral side wall of the protrusion 33b, and the magnetizing element 38 is in contact with the second wall 31b. In this embodiment, on the one hand, the magnetizing element 38 enhances the magnetic flux conducted from the second wall 31b to the first stationary iron core 33 by converging the magnetic lines of force; on the other hand, when the first stationary iron core 33 is assembled to the second wall 31b, the magnetizing element 38 can absorb assembly stress between the first stationary iron core 33 and the second wall 31b, thereby improving the connection stability between the first stationary iron core 33 and the second wall 31b.

[0109] It should be noted that the structure of the magnetizing component 38 can be implemented in various ways, and correspondingly, the assembly method of the magnetizing component 38 between the second wall 31b and the first stationary iron core 33 can also be varied. For ease of understanding, the magnetic circuit portion 30 will be described below with reference to the structure of the magnetizing component 38, but this does not mean that the structure and assembly method of the magnetizing component 38 are limited to this.

[0110] For example, combining Figure 12 As shown, the magnetizing component 38 includes a collar 381, which is sandwiched between the main body 33a and the second wall 31b.

[0111] For example, combining Figure 13 As shown, the magnetizing element 38 includes a collar 381 and a protruding edge 382. The protruding edge 382 is arranged around the periphery of the collar 381, which is sandwiched between the peripheral wall of the protrusion 33b and the inner wall of the insertion hole 31d. The protruding edge 382 is sandwiched between the main body 33a and the second wall 31b. The thickness of the protruding edge 382 in the centerline direction of the insertion hole 31d is greater than the wall thickness of the collar 381, thereby increasing the surface area of ​​the magnetizing element 38 opposite to the protrusion 33b and increasing the magnetic flux conducted by the magnetizing element 38 to the first stationary iron core 33, which in turn helps to increase the magnetic flux conducted through the first stationary iron core 33 to the moving iron core 32. Therefore, the relay 100 of this embodiment does not need to increase the number of turns of the coil 41 or increase the pull-in voltage. The electromagnetic force of the moving iron core 32 can be increased by using the magnetizing element 38, so that the relay 100 can be miniaturized while reducing the pull-in voltage.

[0112] In embodiments where the magnetizing element 38 includes a collar 381 and a protruding edge 382, ​​the magnetizing element 38 may also be configured as follows. Specifically, in conjunction with Figure 14 As shown, the magnetizing component 38 includes a collar 381 and a protruding edge 382. The protruding edge 382 is disposed around the periphery of the collar 381. The collar 381 is sandwiched between the peripheral sidewall of the protrusion 33b and the inner wall of the insertion hole 31d. The protruding edge 382 abuts against the outer surface of the second wall 31b along the wall thickness direction. The thickness of the protruding edge 382 in the direction of the center line of the insertion hole 31d is less than the wall thickness of the collar 381.

[0113] In other embodiments, the structure of the yoke assembly 31 can be improved so that the position between the yoke assembly 31 and the first stationary iron core 33 where magnetic field lines can be conducted has the effect of converging magnetic field lines, thereby increasing the magnetic flux when conducting magnetic field lines to the first stationary iron core 33. For example, combined with Figure 15 As shown, a sleeve 31e protrudes from the side of the second wall 31b facing the first wall 31a. The inner wall of the sleeve 31e is connected to the side surface of the second wall 31b facing away from the first wall 31a, and the protrusion 33b extends into the sleeve 31e.

[0114] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0115] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A magnetic circuit portion of a relay, characterized in that, The magnetic circuit portion includes: A yoke assembly, wherein the yoke assembly encloses and forms a receiving space, the receiving space being used to house a coil assembly having mounting holes, and the yoke assembly having through holes for inserting a push rod; A moving iron core is located in the mounting hole. The moving iron core is used to drive the push rod to move axially relative to the yoke assembly. The moving iron core includes a first convex ring portion, which is arranged axially around the push rod. A first stationary iron core is located inside the mounting hole. At least a portion of the structure of the first stationary iron core is located within the space enclosed by the first convex ring. Magnetic lines of force can be conducted between the first stationary iron core and the inner wall of the first convex ring, and magnetic lines of force can be conducted between the first stationary iron core and the yoke assembly.

2. The magnetic circuit portion of the relay according to claim 1, characterized in that, The inner wall of the mounting hole can guide the moving iron core to move relative to the yoke assembly along the axial direction of the push rod.

3. The magnetic circuit portion of the relay according to claim 1, characterized in that, The inner wall of the mounting hole forms a gap in the axial direction surrounding the push rod. The gap is formed on the periphery of the moving iron core and the first stationary iron core, and the non-magnetic structure of the relay is located outside the gap.

4. The magnetic circuit portion of the relay according to claim 3, characterized in that, The magnetic circuit portion of the relay further includes a magnetic guide cylinder disposed within the gap. At least a portion of the structure of the moving iron core and at least a portion of the structure of the first stationary iron core are located within the magnetic guide cylinder. The magnetic guide cylinder is used to converge the magnetic lines of force generated by the energization of the coil assembly to the periphery of the first stationary iron core.

5. The magnetic circuit portion of the relay according to any one of claims 1-4, characterized in that, The first stationary iron core includes a main body and a protrusion connected to each other. Part of the structure of the main body is housed within the space enclosed by the first convex ring. Magnetic lines of force can be conducted between the peripheral sidewall of the main body and the inner sidewall of the first convex ring. The protrusion protrudes from the end face of the main body facing away from the moving iron core. Magnetic lines of force can be conducted between the protrusion and the yoke assembly.

6. The magnetic circuit portion of the relay according to claim 5, characterized in that, The main body has a first recess at one end facing the moving iron core, and at least a portion of the moving iron core is housed in the first recess.

7. The magnetic circuit portion of the relay according to claim 6, characterized in that, The moving iron core includes a connecting portion for connecting the push rod, and at least a portion of the connecting portion is housed in the first recess. And / or, the moving iron core includes a second convex ring portion, a portion of which is housed within the first recess.

8. The magnetic circuit portion of the relay according to claim 5, characterized in that, The first stationary iron core also includes a limiting part, which is arranged around the periphery of the main body. The peripheral sidewall of the main body and the end face of the limiting part facing the main body form a second recess, and a portion of the structure of the first convex ring is accommodated in the second recess.

9. The magnetic circuit portion of the relay according to any one of claims 1-4, characterized in that, The first stationary iron core includes a main body and a limiting part connected to each other. A portion of the structure of the main body is housed within the space enclosed by the first convex ring. Magnetic lines of force can be conducted between the peripheral sidewall of the main body and the inner sidewall of the first convex ring. The limiting part is arranged around the periphery of the main body and is located outside the space enclosed by the first convex ring part.

10. The magnetic circuit portion of the relay according to claim 5, characterized in that, The yoke assembly includes a first wall and a second wall disposed opposite to each other. The perforation is provided on the first wall, and the second wall is provided with an insertion hole. The protrusion extends into the perforation or the insertion hole.

11. The magnetic circuit portion of the relay according to claim 1, characterized in that, The first stationary iron core includes a main body and a protrusion. The protrusion protrudes from the end face of the main body facing away from the moving iron core. The magnetic circuit part also includes a magnetizing component with a through hole. The magnetizing component is sleeved on the protrusion. The inner wall of the through hole is in contact with the peripheral side wall of the protrusion. The yoke assembly includes a first wall and a second wall arranged opposite to each other. The through hole is located on the first wall. Magnetic lines of force can be conducted between the magnetizing component and the second wall.

12. The magnetic circuit portion of the relay according to claim 11, characterized in that, The magnetizing component includes a collar, which is sandwiched between the main body and the second wall; Alternatively, the magnetizing component includes a collar and a protruding edge, the protruding edge being disposed around the periphery of the collar, the second wall having an insertion hole, the protrusion extending into the insertion hole, the collar being sandwiched between the periphery of the protrusion and the inner wall of the insertion hole, the protruding edge being sandwiched between the main body and the second wall, and the thickness of the protruding edge in the direction of the center line of the insertion hole being greater than the wall thickness of the collar; Alternatively, the magnetizing component includes a collar and a protruding edge, the protruding edge being disposed around the periphery of the collar, the second wall having an insertion hole, the protrusion extending into the insertion hole, the collar being sandwiched between the periphery of the protrusion and the inner wall of the insertion hole, the protruding edge abutting against the outer surface of the second wall along the wall thickness direction, and the thickness of the protruding edge in the direction of the centerline of the insertion hole being less than the wall thickness of the collar.

13. The magnetic circuit portion of the relay according to claim 11, characterized in that, A sleeve protrudes from the second wall on the side where the first wall is located. The inner wall of the sleeve is connected to the surface of the second wall facing away from the first wall, and the protrusion extends into the sleeve.

14. The magnetic circuit portion of the relay according to claim 1, characterized in that, The magnetic circuit section also includes a second stationary iron core, which is located on the side of the moving iron core opposite to the first stationary iron core. A reset spring is provided on the side of the moving iron core opposite to the first stationary iron core. The reset spring is used to push the moving iron core toward the first stationary iron core to reset when the coil assembly is de-energized.

15. The magnetic circuit portion of the relay according to claim 1, characterized in that, The yoke assembly includes a yoke plate and a U-shaped yoke, the yoke plate being connected to both ends of the U-shaped yoke, and the perforation being provided in the yoke plate or the U-shaped yoke; Alternatively, the yoke assembly includes a first yoke plate, a second yoke plate, and two side yoke plates, with the two side yoke plates spaced apart from each other and connected between the first yoke plate and the second yoke plate, and the perforation is provided in the first yoke plate or the second yoke plate. Alternatively, the yoke assembly may include an integrally formed closed yoke ring.

16. The magnetic circuit portion of the relay according to claim 1, characterized in that, The yoke assembly includes a first wall and a second wall disposed opposite to each other, the perforation is disposed on the first wall, and the first stationary iron core is disposed on the first wall or the second wall.

17. The magnetic circuit portion of the relay according to claim 1, characterized in that, The yoke assembly includes a first wall and a second wall disposed opposite to each other. The perforation is disposed on the first wall. The magnetic circuit portion also includes a second stationary iron core. One of the first stationary iron core and the second stationary iron core is disposed on the first wall and is capable of conducting magnetic lines of force between the first wall and the moving iron core. The other is disposed on the second wall and is capable of conducting magnetic lines of force between the second wall and the moving iron core.

18. A relay, characterized in that, Includes the magnetic circuit portion of the relay as described in any one of claims 1 to 17.

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