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, a movable iron core, a static magnetic conductive piece and a magnetic increasing piece, the yoke assembly forms an accommodating space in an enclosing manner, the yoke assembly is provided with a through hole for a push rod to penetrate through, and the movable iron core is located in the accommodating space; the movable iron core is used for driving the push rod to move axially relative to the yoke assembly; the static magnetic conductive piece is located in the accommodating space, magnetic lines can be conducted between the static magnetic conductive piece and the movable iron core, and magnetic lines can be conducted between the static magnetic conductive piece and the yoke assembly; the magnetism increasing piece is arranged between the static magnetic conductive piece and the yoke assembly, and the magnetism increasing piece can conduct magnetic lines between the yoke assembly and the static magnetic conductive piece. According to the magnetic circuit part of the relay and the relay, the electromagnetic force of the movable iron core can be improved while the miniaturization of the relay is considered.

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, essentially acting as an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays roles in automatic adjustment, safety protection, and circuit switching. High-voltage DC relays are relays capable of handling high power. Even under harsh conditions such as high voltage and high current, they possess unparalleled reliability and long service life compared to conventional relays, and are widely used in various fields, such as the new energy vehicle industry.

[0003] In related technologies, the yoke assembly conducts electromagnetic wires to the moving iron core, causing the moving iron core to be magnetized and generate an electromagnetic force that attracts it to the other side of the yoke assembly.

[0004] However, the electromagnetic force of the moving iron core in the related technology is relatively small, and increasing the number of coil turns or increasing the volume of the moving iron core will lead to an increase in the size of the relay, which is not conducive to the miniaturization of the relay. Utility Model Content

[0005] Therefore, it is necessary to provide a magnetic circuit section and a relay to address the issue of how to improve the electromagnetic force of the moving iron core while simultaneously miniaturizing the moving relay.

[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, and the yoke assembly is provided with a through hole for inserting a push rod;

[0008] A movable iron core is located within the receiving space, and the movable iron core is used to drive the push rod to move axially relative to the yoke assembly;

[0009] A stationary magnetic conductor is located within the receiving space, and magnetic lines of force can be conducted between the stationary magnetic conductor and the moving iron core.

[0010] A magnetizing element is disposed between the static magnetic conductor and the yoke assembly, and is capable of conducting magnetic lines of force between the yoke assembly and the static magnetic conductor.

[0011] The magnetic circuit of the aforementioned relay increases the magnetic flux conducted from the yoke assembly to the stationary magnetic conductor by converging magnetic lines of force through the magnetizing component. This allows the stationary magnetic conductor to conduct more magnetic lines of force to the moving iron core, thereby enhancing the electromagnetic force of the moving iron core. Furthermore, this structural design does not require increasing the volume of the moving iron core, thus contributing to the miniaturization of the relay. Therefore, the magnetic circuit of this application can simultaneously achieve relay miniaturization and enhance the electromagnetic force of the moving iron core.

[0012] In one embodiment, the static magnetic conductor includes a protrusion, and the magnetizing component has a through hole. The magnetizing component is sleeved on the protrusion, and the inner wall of the through hole contacts the peripheral sidewall of the protrusion. The magnetizing component can conduct magnetic lines of force between the second wall and the protrusion. In this embodiment, the cooperation between the protrusion and the magnetizing component not only enables the conduction of magnetic lines of force between the static magnetic conductor and the magnetizing component, but also allows the assembly allowance between the two components to be utilized to reduce the assembly stress present when directly assembling the static magnetic conductor to the yoke assembly by sleeved the magnetizing component on the protrusion.

[0013] In one embodiment, the stationary magnetic conductor includes a first stationary iron core, which includes a main body and a first protrusion. Magnetic lines of force can be conducted between the main body and the moving iron core. The first protrusion protrudes from the end face of the main body facing away from the moving iron core. The magnetizing component has a through hole and is sleeved on the first protrusion. The inner wall of the through hole contacts the peripheral side wall of the first protrusion. The magnetizing component can conduct magnetic lines of force between the yoke assembly and the first protrusion. Because the magnetizing component is sleeved on the first protrusion of the first stationary iron core, it occupies little space, thus helping to maintain the miniaturization of the relay. Therefore, adopting the magnetic circuit portion of this application can simultaneously achieve miniaturization of the moving relay and improve the electromagnetic force of the moving iron core.

[0014] In one embodiment, the yoke assembly includes a first wall and a second wall disposed opposite to each other, the perforation is provided on the first wall, the second wall is provided with an insertion hole, and the first protrusion extends into the insertion hole, thereby enabling the first protrusion and the second wall to conduct magnetic lines of force.

[0015] In one embodiment, the magnetizing element includes a collar sandwiched between the main body and the second wall.

[0016] In one embodiment, the magnetizing component includes a collar and a protruding edge. The protruding edge is disposed around the periphery of the collar. The collar is sandwiched between the peripheral side wall of the first protrusion and the inner wall of the insertion hole. The protruding edge is sandwiched between the main body and the second wall. The thickness of the protruding edge in the direction of the center line of the insertion hole is greater than the wall thickness of the collar.

[0017] In one embodiment, the magnetizing component includes a collar and a protruding edge. The protruding edge is disposed around the periphery of the collar. The collar is sandwiched between the peripheral sidewall of the first protrusion and the inner wall of the insertion hole. The protruding edge abuts against the outer surface of the second wall along the wall thickness direction of the second wall. The thickness of the protruding edge in the centerline direction of the insertion hole is less than the wall thickness of the collar.

[0018] In one embodiment, the stationary magnetic conductor includes a first stationary iron core and a second stationary iron core, and the moving iron core is disposed between the first stationary iron core and the second stationary iron core along the axial direction of the push rod.

[0019] In one embodiment, the yoke assembly includes a first wall and a second wall disposed opposite to each other. The through hole is provided in the first wall, and the second wall has an insertion hole. The second stationary iron core includes a second protrusion. The magnetizing member has a through hole and is sleeved on the second protrusion. The inner wall of the through hole contacts the peripheral side wall of the second protrusion. The magnetizing member can conduct magnetic lines of force between the second wall and the second protrusion. Since the magnetizing member is sleeved on the second protrusion of the second stationary iron core, it occupies little space, which is beneficial to maintaining the miniaturization of the relay. Therefore, adopting the magnetic circuit part of this application can achieve both miniaturization of the moving relay and improvement of the electromagnetic force of the moving iron core.

[0020] In one embodiment, the magnetizing element includes a collar that is fitted onto the second protrusion and abuts against the inner surface of the second wall.

[0021] In one embodiment, the magnetizing element includes a collar and a protruding edge. The collar is sleeved on the second protrusion, and the protruding edge is disposed around the periphery of the collar and abuts against the inner surface of the second wall. The thickness of the protruding edge in the direction of the center line of the collar is greater than the wall thickness of the collar.

[0022] In one embodiment, the magnetizing element includes a collar and a protruding edge. The collar is sleeved on the second protrusion, and the protruding edge is disposed around the periphery of the collar and abuts against the outer surface of the second wall. The thickness of the protruding edge in the direction of the center line of the collar is less than the wall thickness of the collar.

[0023] In one embodiment, the moving iron core includes a first convex ring portion axially arranged around the push rod. A recessed portion is provided at one end of the first stationary iron core facing the moving iron core. The first convex ring portion extends into the recessed portion, and magnetic lines of force can be conducted between the peripheral sidewall of the recessed portion and the outer sidewall of the first convex ring portion. In this embodiment, because magnetic lines of force can be conducted between the peripheral sidewall of the recessed portion and the outer sidewall of the first convex ring portion, magnetic lines of force can be stably conducted between the first stationary iron core and the moving iron core during the movement of the moving iron core relative to the first stationary iron core.

[0024] In one embodiment, the moving iron core includes a first convex ring portion axially arranged around the push rod. A portion of the structure of the first stationary iron core is housed within the space enclosed by the first convex ring portion. Magnetic lines of force can be conducted between the peripheral sidewall of the first stationary iron core and the inner sidewall of the first convex ring portion. With this arrangement, magnetic lines of force can be stably conducted between the first stationary iron core and the moving iron core during the movement of the moving iron core relative to the first stationary iron core.

[0025] In one embodiment, the end of the first stationary iron core facing the moving iron core has a recess, and at least a portion of the structure of the moving iron core is housed in the 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.

[0026] 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 recess. In this embodiment, the recess allows for the housing of at least a portion of the connecting portion, resulting in a more compact structure between the moving iron core and the first stationary iron core while ensuring magnetic conductivity, thereby reducing the overall size of the relay and facilitating weight reduction.

[0027] In one embodiment, the moving iron core includes a second convex ring portion, a portion of which is housed within the 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.

[0028] In one embodiment, the magnetic circuit portion of the relay further includes a magnetic guide cylinder, within which at least a portion of the moving iron core and at least a portion of the first stationary iron core are located. 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, facilitating the conduction of the magnetic lines of force from the first stationary iron core to the moving iron core.

[0029] In one embodiment, the system further includes a metal shell, the magnetic cylinder is fitted onto the metal shell, the moving iron core is located inside the metal shell, and at least a portion of the structure of the first stationary iron core is located inside the metal shell.

[0030] On the other hand, this application provides a relay, including the magnetic circuit portion of the relay as described above. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a relay in one embodiment.

[0032] Figure 2 for Figure 1 The diagram shows an exploded view of the relay.

[0033] Figure 3 This is a cross-sectional schematic diagram of a relay in one embodiment.

[0034] Figure 4 This is a cross-sectional view of the relay in another embodiment.

[0035] Figure 5 This is a cross-sectional view of the relay in another embodiment.

[0036] Figure 6 This is a cross-sectional view of the relay in another embodiment.

[0037] Figure 7 This is a cross-sectional schematic diagram of a relay according to another embodiment.

[0038] Figure 8 This is a schematic diagram of another embodiment of the relay in this application.

[0039] Figure 9 This is a schematic diagram of another embodiment of the relay in this application.

[0040] Figure 10 This is a schematic diagram of another embodiment of the relay in this application.

[0041] Figure 11 This is a schematic diagram of another embodiment of the relay in this application.

[0042] Figure 12 This is a cross-sectional schematic diagram of a relay according to another embodiment of this application.

[0043] Figure label:

[0044] 100. Relay;

[0045] 10. Contact part; 11. Stationary contact; 12. Moving contact;

[0046] 20. Actuating mechanism; 21. Actuating seat; 22. Actuating rod;

[0047] 30. Magnetic circuit section; 31. Yoke assembly; 31a. First wall; 31b. Second wall; 31c. Through hole; 31d. Insertion hole; 31e. Sleeve; 311. Yoke plate; 312. U-shaped yoke; 32. Moving iron core; 321. First convex ring; 322. Second convex ring; 323. Connecting part; 33. First stationary iron core; 331. Recessed part; 33a. Main body; 33b. First protrusion; 33c. Limiting part; 34. Metal shell; 341. Tube body; 342. Inner folded edge; 343. Outer folded edge; 35. Return spring; 36. Second stationary iron core; 361. Supporting part; 37. Magnetic guide cylinder; 38. Magnetizing component; 38a. Through hole; 381. Collar; 382. Protruding edge;

[0048] 40. Coil assembly; 40a. Mounting hole; 41. Coil; 42. Coil holder;

[0049] 50. Insulating cover. Detailed Implementation

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] Combination Figure 1 and Figure 2 As shown, this application provides a relay 100 that can be applied in automatic control circuits.

[0057] The relay 100 includes a contact portion 10, an actuation mechanism 20, and a magnetic circuit portion 30.

[0058] 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.

[0059] 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.

[0060] The relay 100 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 portion 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.

[0061] Continue to combine Figure 1 and Figure 2 As shown, the magnetic circuit section 30 includes a yoke assembly 31 and a moving iron core 32.

[0062] The magnetic circuit section 30 also includes a structure corresponding to the moving iron core 32 in the direction of movement of the moving iron core 32, used to conduct magnetic lines of force between the moving iron core 32 and the yoke assembly 31. For ease of understanding, this type of structure capable of conducting magnetic lines of force with the moving iron core 32 is referred to as a "static magnetic conductor". In this embodiment, the static magnetic conductor is located within the receiving space enclosed by the yoke assembly 31, and magnetic lines of force can be conducted between the static magnetic conductor and the moving iron core 32.

[0063] It should be noted that a static magnetic conductive component can be a single magnetic conductive structural component, or a combination of two or more magnetic conductive structural components. For example, combining... Figure 3 As shown, in some embodiments, the stationary magnetic conductor includes a first stationary iron core 33. For example, combined with... Figure 4 As shown, in some embodiments, the stationary magnetic conductor includes a first stationary iron core 33 and a second stationary iron core 36.

[0064] In an embodiment where the stationary magnetic conductor includes a first stationary iron core 33 and a second stationary iron core 36, the first stationary iron core 33 and the second stationary iron core 36 may be respectively disposed on different sides of the moving iron core 32, that is, the moving iron core 32 may be located between the first stationary iron core 33 and the second stationary iron core 36. In this embodiment, the positions of the first stationary iron core 33 and the second stationary iron core 36 relative to the moving iron core 32 can be interchanged, and the first stationary iron core 33 and the second stationary iron core 36 are adapted to be able to conduct magnetic lines of force between the moving iron core 32 and the yoke assembly 31.

[0065] For ease of explanation, the following will describe the embodiments of the static magnetic conductor including the first static iron core 33 and the embodiments of the static magnetic conductor including the first static iron core 33 and the second static iron core 36.

[0066] In some embodiments, the moving iron core 32, the first stationary iron core 33, and the coil 40 are all located within the space enclosed by the yoke assembly 31.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] Furthermore, a return spring 35 is provided between the yoke plate 311 and the moving iron core 32.

[0071] 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.

[0072] 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.

[0073] In some embodiments, the first stationary iron core 33 is disposed on the inner wall of the yoke assembly 31 opposite to the yoke plate 311. Thus, when the coil 41 is de-energized, the reset spring 35 drives the moving iron core 32 to reset in a direction away from the yoke plate 311, that is, the reset spring 35 drives the moving iron core 32 to reset towards the first stationary iron core 33.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] Combination Figure 2 and Figure 3 As shown, for ease of description, the side wall 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 that is disposed opposite to the first wall 31a is referred to as the "second wall 31b". That is to say, the yoke assembly 31 includes the first wall 31a and the second wall 31b disposed opposite to each other, and the through hole 31c is disposed on the first wall 31a.

[0079] In some embodiments, a first stationary iron core 33 is disposed on a second wall 31b, and magnetic lines of force can be conducted between the first stationary iron core 33 and the second wall 31b. Thus, the magnetic lines of force of the yoke assembly 31 are conducted to the first stationary iron core 33 at the second wall 31b, thereby enabling the first stationary iron core 33 to conduct the magnetic lines of force to the moving iron core 32 so that the moving iron core 32 is magnetized.

[0080] by Figure 2 and Figure 3 Taking 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] Magnetic lines of force can be conducted between one end of the first stationary iron core 33 and the yoke assembly 31, and magnetic lines of force can be conducted between the other end and the moving iron core 32.

[0086] 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.

[0087] 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 is provided, as long as the gap between the first stationary iron core 33 and the yoke assembly 31 meets the magnetic conduction requirements, it is acceptable.

[0088] Combination Figure 4As shown, in an embodiment where the stationary magnetic conductor includes a first stationary iron core 33 and a second stationary iron core 36, the second stationary iron core 36 may be 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, thereby providing a greater driving force for the axial movement of the push rod 22.

[0089] In another embodiment, the second stationary iron core 36 may be connected to the second wall 31b, and the first stationary iron core 33 may be connected to the first wall 31a, that is, the positions of the first stationary iron core 31a and the second stationary iron core 36 in the yoke assembly 31 are interchanged.

[0090] Continue reading Figure 4 As shown, in the embodiment where the magnetic circuit portion 30 includes a second stationary iron core 36, 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 40 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 40 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.

[0091] Combination Figure 6 As shown, in some embodiments, the magnetic circuit portion 30 of the relay 100 further includes a magnetic guide cylinder 37, within which at least a portion of the moving iron core 32 and at least a portion of the first stationary iron core 33 are located. In this embodiment, the magnetic guide cylinder 37 can be used to concentrate the magnetic lines of force generated by the energized coil 40 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.

[0092] In some embodiments, the magnetic cylinder 37 is located within the mounting hole 40a. The magnetic cylinder 37 and the second wall 31b are capable of conducting magnetic lines of force.

[0093] In some implementations, continue to combine Figure 4 and Figure 5As shown, the first stationary iron core 33 includes a main body portion 33a and a first protrusion portion 33b connected to each other. The first protrusion portion 33b protrudes from the end face of the main body portion 33a facing away from the moving iron core 32. The first protrusion portion 33b and the second wall 31b can conduct magnetic lines of force, that is, when the coil 41 is energized and generates an electromagnetic field, the magnetic lines of force in the second wall 31b can be conducted to the first protrusion portion 33b, and then conducted to the main body portion 33a via the first protrusion portion 33b.

[0094] For example, in some embodiments, the second wall 31b is provided with a socket 31d, and the first protrusion 33b extends into the socket 31d. In this embodiment, the first protrusion 33b extends into the socket 31d, thereby enabling the first protrusion 33b and the second wall 31b to conduct magnetic lines of force.

[0095] It should be noted that the first protrusion 33b may be in contact with the second wall 31b or there may be a magnetic gap between them, as long as the second wall 31b can conduct magnetic lines of force to the first protrusion 33b to meet the needs of the first stationary iron core 33 to receive magnetic lines of force.

[0096] See again Figure 2 and Figure 3 As shown, in some embodiments, the magnetic circuit portion 30 further includes a magnetizing element 38, which is disposed between the stationary magnetic conductor and the yoke assembly 31. In this embodiment, the magnetizing element 38 can conduct magnetic lines of force between the yoke assembly 31 and the stationary magnetic conductor. By utilizing the converging effect of the magnetizing element 38 on the magnetic lines of force, the magnetic flux conducted from the yoke assembly 31 to the moving iron core 32 via the stationary magnetic conductor is enhanced, thereby increasing the electromagnetic force of the moving iron core 32. Furthermore, this structural arrangement does not require increasing the volume of the moving iron core 32, thus contributing to the miniaturization of the relay 100. Therefore, by adopting the magnetic circuit portion 30 of this application, it is possible to simultaneously achieve relay miniaturization and improve the electromagnetic force of the moving iron core 32.

[0097] Furthermore, the static magnetic conductor includes a protrusion, and the magnetizing component 38 has a through hole 38a. The magnetizing component 38 is sleeved on the protrusion, and the inner wall of the through hole 38a contacts the peripheral side wall of the protrusion. The magnetizing component 38 can conduct magnetic lines of force between the second wall 31b and the protrusion. In this embodiment, the cooperation between the protrusion and the magnetizing component 38 not only enables the conduction of magnetic lines of force between the static magnetic conductor and the magnetizing component 38, but also allows the assembly allowance between the two components to be used to reduce the assembly stress that exists when directly assembling the static magnetic conductor to the yoke assembly 31.

[0098] It should be noted that the static magnetic conductor can include either a first static iron core 33 or a second static iron core 36. In the embodiment where the static magnetic conductor includes a first static iron core 33 and a second static iron core 36, one of the first static iron core 33 and the second static iron core 36 can be disposed on the first wall 31a, and the other on the second wall 31b. Correspondingly, in the embodiment where the static magnetic conductor includes a protrusion, the protrusion can be disposed on the first static iron core 33 (e.g., the first protrusion 33b) or on the second static iron core 36 (e.g., the second protrusion in an embodiment where the second static iron core 36 includes a second protrusion). Therefore, there are various embodiments in which the magnetizing member 38 conducts the magnetic lines of force from the yoke assembly 31 to the static magnetic conductor.

[0099] For example, the first stationary iron core 33 is disposed on the side of the moving iron core 32 near the second wall 31b, and the magnetizing element 38 can play the role of conducting magnetic lines of force between the second wall 31b and the first stationary iron core 33.

[0100] For example, the second stationary iron core 36 is disposed on the side of the moving iron core 32 near the second wall 31b, and the magnetizing element 38 can conduct magnetic lines of force between the second wall 31b and the second stationary iron core 36. In this embodiment, the first stationary iron core 33 can be disposed between the first wall 31a and the moving iron core 32, so that magnetic lines of force can be conducted between the moving iron core 32 and the first wall 31a through the first stationary iron core 33.

[0101] It should be noted that in the embodiment where the magnetizing element 38 can conduct magnetic lines of force between the second wall 31b and the first stationary iron core 33, there are multiple possibilities for the cooperation between the first stationary iron core 33 and the magnetizing element 38.

[0102] For example, in an embodiment where the first stationary iron core 33 includes a connected main body portion 33a and a first protrusion portion 33b, the magnetizing member 38 is provided with a through hole 38a. The magnetizing member 38 is sleeved on the first protrusion portion 33b, the inner wall of the through hole 38a is in contact with the peripheral side wall of the first protrusion portion 33b, and the magnetizing member 38 is in contact with the second wall 31b. In this embodiment, the magnetizing member 38 enhances the magnetic flux conducted from the second wall 31b to the first stationary iron core 33 by utilizing the converging effect of the magnetic lines of force. As a result, the first stationary iron core 33 conducts more magnetic lines of force to the moving iron core 32, thereby improving the electromagnetic force of the moving iron core 32. Since the magnetizing member 38 is sleeved on the first protrusion portion 33b of the first stationary iron core 33, it occupies little space, which is beneficial for maintaining the miniaturization of the relay 100. Therefore, by adopting the magnetic circuit portion 30 of this application, it is possible to improve the electromagnetic force of the moving iron core 32 while simultaneously achieving the miniaturization of the moving relay 100.

[0103] Furthermore, 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 to improve the connection stability between the second stationary iron core 36 and the second wall 31b.

[0104] In some embodiments, the magnetizing element 38 may not have a through hole 38a. For example, the magnetizing element 38 is sheet-shaped and sandwiched between the first stationary iron core 33 and the second wall 31b. In this way, the magnetizing element 38 can also conduct magnetic lines of force between the second wall 31b and the first stationary iron core 33, thereby enhancing the magnetic flux conducted between them. At the same time, the magnetizing element 38 can also absorb the assembly tolerance between the first stationary iron core 33 and the second wall 31b along the axial direction of the push rod 22.

[0105] 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.

[0106] For example, combining Figure 7 As shown, the magnetizing component 38 includes a collar 381 and a protruding edge 382. The protruding edge 382 is arranged around the periphery of the collar 381. The collar 381 is sandwiched between the peripheral side wall of the first 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.

[0107] 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 8 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. The collar 381 is sandwiched between the peripheral wall of the first 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, so as to increase the surface area of ​​the magnetizing element 38 facing the first protrusion 33b, and increase the magnetic flux conducted by the magnetizing element 38 to the first stationary iron core 33, thereby facilitating the increase of 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 40 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.

[0108] It should be noted that if there are machining errors during the processing of the yoke assembly 31, resulting in poor coaxiality between the through hole 31c and the insertion hole 31d, then when assembling the first protrusion 33b into the insertion hole 31d, the diameter of the insertion hole 31d needs to be increased to facilitate its fit with the first protrusion 33b. Otherwise, the first protrusion 33b may easily interfere with the inner wall of the insertion hole 31d, causing assembly difficulties or generating assembly stress. In the embodiment of this application, since the collar 381 is sandwiched between the peripheral sidewall of the first protrusion 33b and the inner wall of the insertion hole 31d, a certain assembly gap is allowed between the collar 381 and the peripheral sidewall of the first protrusion 33b, and also between the collar 381 and the insertion hole 31d. In this way, the collar 381 can be used to absorb the assembly tolerance when the first protrusion 33b is assembled into the insertion hole 31d, reduce the assembly stress, and thus improve the assembly stability between the first stationary iron core 33 and the second wall 31b.

[0109] Furthermore, the assembly gap between the collar 381 and the peripheral sidewall of the first protrusion 33b is smaller than the assembly gap between the collar 381 and the insertion hole 31d. In other words, regarding these two assembly gaps, the assembly gap between the collar 381 and the peripheral sidewall of the first protrusion 33b is relatively small, which helps improve the magnetic conductivity between them. Correspondingly, the assembly gap between the collar 381 and the insertion hole 31d is relatively large, which helps to utilize the collar 381 to absorb the assembly tolerance when the first protrusion 33b is assembled into the insertion hole 31d, thus reducing assembly stress.

[0110] In some embodiments, the magnetizing element 38 can also be other structures. For example, combined with Figure 10 As shown, the magnetizing component 38 includes a collar 381, which is sandwiched between the main body 33a and the second wall 31b.

[0111] It should be noted that in the embodiment where the static magnetic conductor includes a first static iron core 33 and a second static iron core 36, after the positions of the second static iron core 36 and the first static iron core 33 relative to the moving iron core 32 are interchanged, the second static iron core 36 cooperates with the magnetizing component 38. The cooperation method between the second static iron core 36 and the magnetizing component 38 can refer to the cooperation method between the first static iron core 33 and the magnetizing component 38 in the above embodiment.

[0112] The relevant structures of the first stationary iron core 33, the second stationary iron core 36, and the moving iron core 32 can be adjusted according to the usage requirements of the relay 100. The specific structure of the first stationary iron core 33 and the moving iron core 32, as well as the structural arrangement for transmitting magnetic field lines between them, can be referred to the above-described implementation where the first stationary iron core 33 is positioned between the second wall 31b and the moving iron core 32; further details will not be elaborated here.

[0113] For example, in an embodiment where the second stationary iron core 36 is disposed between the first wall 31a and the moving iron core 32, the second stationary iron core 36 includes a second protrusion. The magnetizing member 38 is provided with a through hole 38a, and the magnetizing member 38 is sleeved on the second protrusion. The inner wall of the through hole 38a is in contact with the peripheral side wall of the second protrusion, and the magnetizing member 38 can conduct magnetic lines of force between the second wall 31b and the second protrusion.

[0114] For example, in some embodiments, the magnetizing element 38 includes a collar 381, which is fitted onto the second protrusion and abuts against the inner surface of the second wall 31b. Alternatively, the magnetizing element 38 includes a collar 381 and a protruding edge 382, ​​with the collar 381 fitted onto the second protrusion and the protruding edge 382 surrounding the circumference of the collar 381 and abutting against the inner surface of the second wall 31b, wherein the thickness of the protruding edge 382 in the direction of the centerline of the collar 381 is greater than the wall thickness of the collar 381. Alternatively, the magnetizing element 38 includes a collar 381 and a protruding edge 382, ​​with the collar 381 fitted onto the second protrusion and the protruding edge 382 surrounding the circumference of the collar 381 and abutting against the outer surface of the second wall 31b, wherein the thickness of the protruding edge 382 in the direction of the centerline of the collar 381 is less than the wall thickness of the collar 381.

[0115] Furthermore, the assembly gap between the collar 381 and the peripheral sidewall of the second protrusion is smaller than the assembly gap between the collar 381 and the insertion hole 31d. In other words, regarding these two assembly gaps, the smaller gap between the collar 381 and the peripheral sidewall of the second protrusion improves the magnetic conductivity between them; correspondingly, the larger gap between the collar 381 and the insertion hole 31d allows the collar 381 to absorb the assembly tolerances when the second protrusion is assembled into the insertion hole 31d, reducing assembly stress.

[0116] Regarding the assembly method and effect of the magnetizing component 38 between the second stationary iron core 36 and the second wall 31b, please refer to the implementation method of the magnetizing component 38 between the first stationary iron core 33 and the second wall 31b, which will not be repeated here.

[0117] In some implementations, combined Figure 2 As shown, the magnetic circuit portion 30 includes a metal shell 34, which is disposed within the space enclosed by the yoke assembly 31. The metal shell 34 has a cylindrical structure that is axially enclosed around the push rod 22. The moving iron core 32 is located within the metal shell 34, and at least a portion of the first stationary iron core 33 is located within the metal shell 34. Understandably, since the metal shell 34 is located within the space enclosed by the yoke assembly 31, the portions of the moving iron core 32 and the stationary iron core located within the metal shell 34 are also located within the space enclosed by the yoke assembly 31.

[0118] It should be noted that the coil 40 is located within the space enclosed by the yoke assembly 31 and is wound around the outer periphery of the metal shell 34. The electromagnetic field generated when the coil 40 is energized 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. Thus, 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.

[0119] Understandably, in embodiments where the relay 100 includes a metal housing 34 and a magnetic cylinder 37, the magnetic cylinder 37 is sleeved on the outside of the metal housing 34, that is, the magnetic cylinder 37 is located between the inner wall of the mounting hole 40a and the outer wall of the metal housing 34.

[0120] In some embodiments, the metal shell 34 includes a tube 341 and an inner flange 342 and an outer flange 343 connected to both ends of the tube 341. The inner flange 342 protrudes from the inner wall of the tube 341, and the outer flange 343 protrudes from the outer wall of the tube 341. In this embodiment, the arrangement of the inner flange 342 and the outer flange 343 facilitates the connection of both ends of the metal shell 34 to corresponding structural components by welding. For example, the inner flange 342 is welded to the first stationary iron core 33. The outer flange 343 is welded to the first wall 31a.

[0121] In some embodiments, one end of the tube body 341 is sealed to the first stationary iron core 33 via an inner folded edge 342, and the other end of the tube body 341 is sealed to the first wall 31a via an outer folded edge 343. Since the first wall 31a has a perforation 31c, the space where the contact portion 10 is located is connected to the space enclosed by the metal shell 34 through the perforation 31c. Therefore, the two ends of the metal shell 34 are sealed to the corresponding structural components, which enhances the sealing performance of the space where the contact portion 10 is located.

[0122] It should be noted that the inner folded edge 342 and the outer folded edge 343 of the metal shell 34 may be omitted. For example, in some embodiments, the metal shell 34 includes a connected tube body 341 and an inner folded edge 342, the inner folded edge 342 protruding from the inner wall of the tube body 341, one end of the tube body 341 being sealed to the first wall 31a, and the other end being sealed to the first stationary iron core 33 through the inner folded edge 342. As another example, the metal shell 34 includes a connected tube body 341 and an outer folded edge 343, the outer folded edge 343 protruding from the outer wall of the tube body 341, one end of the tube body 341 being sealed to the first wall 31a through the outer folded edge 343, and the other end being sealed to the first stationary iron core 33.

[0123] It should be noted that in the embodiment where the stationary magnetic conductor includes a first stationary iron core 33 and a second stationary iron core 36, the metal shell 34 can be sealed and welded to the first stationary iron core 33 as described above. After the positions of the first stationary iron core 33 and the second stationary iron core 36 relative to the moving iron core 32 are interchanged, the second stationary iron core 36 can be sealed and welded to the metal shell 34 in a similar manner. For details, please refer to the connection method between the first stationary iron core 33 and the metal shell 34 described above, which will not be repeated here.

[0124] The structural arrangement of the metal shell 34 in the relay 100 will be further explained below with reference to the structure of the first stationary iron core 33. For example, in an embodiment where the first stationary iron core 33 includes a connected main body 33a and a first protrusion 33b, and the metal shell 34 includes a connected tube 341 and an inner folded edge 342, one end of the tube 341 is connected to the first wall 31a, and the other end is fitted around the outer periphery of the main body 33a. The inner folded edge 342 is sandwiched between the main body 33a and the magnetizing member 38, thereby stably mounting the metal shell 34 between the first wall 31a and the second wall 31b.

[0125] It should be noted that the metal casing 34 is not essential; that is, in some embodiments, the metal casing 34 can be omitted, thereby freeing up space to wind a coil 41 with more turns, thus increasing the switching voltage without increasing the size of the relay 100. Of course, the number of coil turns can also be omitted. Because there is no metal casing 34, the mounting hole 40a of the coil assembly 40 and its surrounding structure can be recessed inwards as a whole, thereby reducing the size of the relay 100 and achieving miniaturization.

[0126] The structure of the first stationary iron core 33 and the moving iron core 32, as well as the way in which magnetic lines of force can be transmitted between them, are not specified here.

[0127] In some embodiments, the moving iron core 32 and the first stationary iron core 33 have an overlapping portion in the axial direction perpendicular to the push rod 22.

[0128] Combination Figure 8 As shown, the moving iron core 32 includes a first protruding ring portion 321, which is axially arranged around the push rod 22.

[0129] In some embodiments, a portion of the structure of the first stationary iron core 33 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 first stationary iron core 33 and the inner sidewall of the first convex ring portion 321, thereby ensuring stable magnetic line conduction between the first stationary iron core 33 and the moving iron core 32 during movement of the moving iron core 32 relative to the first stationary iron core 33. Further, continuing the combination... Figure 8As shown, in an embodiment where the first stationary iron core 33 includes a connected main body portion 33a and a first protrusion portion 33b, a portion of the structure of the main body portion 33a is housed within the space enclosed by the first protruding ring portion 321. In this embodiment, the peripheral sidewall of the main body portion 33a and the inner sidewall of the first protruding ring portion 321 can conduct magnetic lines of force. Since a portion of the structure of the main body portion 33a is housed within the space enclosed by the first protruding ring portion 321, the main body portion 33a can conduct magnetic lines of force to the first protruding ring portion 321, thereby enabling the first stationary iron core 33 to conduct magnetic lines of force from the second wall 31b to the moving iron core 32. This facilitates the magnetization of the moving iron core 32, which then attracts the first wall 31a or the second stationary iron core 36 located on the first wall 31a. Consequently, the moving iron core 32, via the push rod 22, drives the push seat 21 closer to the stationary contact 11, thereby enabling the moving contact piece 12 on the push seat 21 to contact the stationary contact 11.

[0130] Combination Figure 9 As shown, the main body 33a has a 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 accommodated in the 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.

[0131] Furthermore, combined Figure 11 As shown, 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 recessed portion 331. In this embodiment, the recessed portion 331 can accommodate 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.

[0132] It should be noted that the end of the push rod 22 connected to the connecting part 323 extends into the 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 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.

[0133] It should be noted that the recess 331 is not limited to accommodating the connecting part 323 and providing clearance for the movement of the push rod 22.

[0134] For example, combining Figure 9As shown, the first convex ring portion 321 extends into the recessed portion 331, and magnetic field lines can be conducted between the peripheral sidewall of the recessed portion 331 and the outer sidewall of the first convex ring portion 321. In this embodiment, since magnetic field lines can be conducted between the peripheral sidewall of the recessed portion 331 and the outer sidewall of the first convex ring portion 321, magnetic field lines can be stably conducted between the first stationary iron core 33 and the moving iron core 32 during the movement of the moving iron core 32 relative to the first stationary iron core 33. Furthermore, in some embodiments, combined with... Figure 10 As shown, the moving iron core 32 includes a second convex ring portion 322, a portion of which is housed within a recessed portion 331. Since the 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 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.

[0135] 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 accommodates the main body portion 33a, which forms a 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.

[0136] Furthermore, this structure also improves the magnetic conductivity from the first stationary iron core 33 to the moving iron core 32. Specifically, 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 conductivity. 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.

[0137] 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 situation.

[0138] In some embodiments, a portion of the second convex ring portion 322 is housed within the recessed portion 331, and at least a portion of the connecting portion 323 is located within the recessed portion 331. This allows the recessed portion 331 to accommodate both the first convex 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 simultaneously increasing the magnetic flux of the moving iron core 32, thus facilitating the miniaturization of the relay 100.

[0139] Combination Figure 12 As shown, in some embodiments, the first stationary iron core 33 further includes a limiting portion 33b. The limiting portion 33b is arranged around the periphery of the main body portion 33a, thereby forming a first recess 3311 on the periphery of the main body portion 33a. Understandably, the end face of the limiting portion 33b facing the main body portion 33a and the outer wall of the main body portion 33a together form the first recess 3311.

[0140] It should be noted that the limiting part 33b is located inside the metal shell 34. The limiting part 33b may be in contact with the inner wall of the metal shell 34, or there may be a gap between it and the inner wall of the metal shell 34; this is not limited here.

[0141] 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.

[0142] 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, and the yoke assembly is provided with a through hole for inserting a push rod; A movable iron core is located within the receiving space, and the movable iron core is used to drive the push rod to move axially relative to the yoke assembly; A stationary magnetic conductor is located within the receiving space, and magnetic lines of force can be conducted between the stationary magnetic conductor and the moving iron core. A magnetizing element is disposed between the static magnetic conductor and the yoke assembly, and is capable of conducting magnetic lines of force between the yoke assembly and the static magnetic conductor.

2. The magnetic circuit portion of the relay according to claim 1, characterized in that, The static magnetic conductor includes a protrusion, and the magnetizing component has a through hole. The magnetizing component is sleeved on the protrusion, and the inner wall of the through hole is in contact with the peripheral side wall of the protrusion. The magnetizing component can conduct magnetic lines of force between the second wall and the protrusion.

3. The magnetic circuit portion of the relay according to claim 1, characterized in that, The static magnetic conductor includes a first static iron core, which includes a main body and a first protrusion. Magnetic lines of force can be conducted between the main body and the moving iron core. The first protrusion protrudes from the end face of the main body facing away from the moving iron core. The magnetizing component has a through hole and is sleeved on the first protrusion. The inner wall of the through hole contacts the peripheral side wall of the first protrusion. The magnetizing component can conduct magnetic lines of force between the yoke assembly and the first protrusion.

4. The magnetic circuit portion of the relay according to claim 3, 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 first protrusion extends into the insertion hole.

5. The magnetic circuit portion of the relay according to claim 4, 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 collar being sandwiched between the peripheral side wall of the first 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 centerline direction 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 collar being sandwiched between the peripheral sidewall of the first 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 of the second wall, and the thickness of the protruding edge in the direction of the center line of the insertion hole being less than the wall thickness of the collar.

6. The magnetic circuit portion of the relay according to claim 1, characterized in that, The static magnetic conductor includes a first static iron core and a second static iron core, and the moving iron core is disposed between the first static iron core and the second static iron core along the axial direction of the push rod.

7. The magnetic circuit portion of the relay according to claim 6, characterized in that, The yoke assembly includes a first wall and a second wall disposed opposite to each other. The through hole is provided on the first wall, and the second wall is provided with an insertion hole. The second stationary iron core includes a second protrusion. The magnetizing component has a through hole. The magnetizing component is sleeved on the second protrusion. The inner wall of the through hole is in contact with the peripheral side wall of the second protrusion. The magnetizing component can conduct magnetic lines of force between the second wall and the second protrusion.

8. The magnetic circuit portion of the relay according to claim 7, characterized in that, The magnetizing component includes a collar, which is sleeved on the second protrusion and abuts against the inner surface of the second wall; Alternatively, the magnetizing component includes a collar and a protruding edge. The collar is sleeved on the second protrusion, and the protruding edge is arranged around the periphery of the collar and abuts against the inner surface of the second wall. The thickness of the protruding edge in the direction of the center line of the collar is greater than the wall thickness of the collar. Alternatively, the magnetizing component includes a collar and a protruding edge. The collar is sleeved on the second protrusion, and the protruding edge is arranged around the periphery of the collar and abuts against the outer surface of the second wall. The thickness of the protruding edge in the direction of the center line of the collar is less than the wall thickness of the collar.

9. The magnetic circuit portion of the relay according to any one of claims 3-8, characterized in that, The moving iron core includes a first convex ring portion, which is axially arranged around the push rod. The first stationary iron core has a recessed portion at one end facing the moving iron core. The first convex ring portion extends into the recessed portion, and magnetic lines of force can be conducted between the peripheral sidewall of the recessed portion and the outer sidewall of the first convex ring portion.

10. The magnetic circuit portion of the relay according to any one of claims 3-8, characterized in that, The moving iron core includes a first convex ring portion, which is axially arranged around the push rod. A portion of the structure of the first stationary iron core is housed within the space enclosed by the first convex ring portion. Magnetic lines of force can be conducted between the peripheral sidewall of the first stationary iron core and the inner sidewall of the first convex ring portion.

11. The magnetic circuit portion of the relay according to claim 10, characterized in that, The first stationary iron core has a recessed portion at one end facing the moving iron core, and at least a portion of the structure of the moving iron core is housed in the recessed portion.

12. The magnetic circuit portion of the relay according to claim 11, 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 recessed portion. And / or, the moving iron core includes a second convex ring portion, a portion of which is housed in the recessed portion.

13. The magnetic circuit portion of the relay according to any one of claims 3-8, characterized in that, The magnetic circuit section also includes a coil assembly located within the receiving space. The coil assembly has a mounting hole, and the moving iron core and the first stationary iron core are located within the mounting hole. A reset spring is provided on the side of the moving iron core facing away from 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.

14. The magnetic circuit portion of the relay according to claim 13, characterized in that, The magnetic circuit portion of the relay further includes a magnetic guide cylinder, in which 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. 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.

15. The magnetic circuit portion of the relay according to claim 14, characterized in that, It also includes a metal shell, the magnetic cylinder is sleeved on the metal shell, the moving iron core is located inside the metal shell, and at least a portion of the structure of the first stationary iron core is located inside the metal shell.

16. 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.

17. A relay, characterized in that, Includes the magnetic circuit portion of the relay as described in any one of claims 1 to 16.

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