Relay

Abstract

The utility model discloses a relay which comprises a coil frame and a circuit board. The coil rack is provided with a limiting bulge; the circuit board is mechanically connected with the coil rack; a notch is formed in the outer periphery of the circuit board, and the limiting protrusion penetrates through the notch and is used for limiting the circuit board in the thickness direction of the circuit board and in the direction perpendicular to the axial direction of the coil frame and parallel to the circuit board.

Description

Technical Field

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

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

[0003] A high-voltage DC relay is a type of relay. In the prior art, a high-voltage DC relay includes a coil and a circuit board. The coil is electrically connected to the circuit board, and the circuit board is used to control the coil to be energized or de-energized.

[0004] In existing technology, the coil is connected to the circuit board via leads through soldering. This soldering connection serves not only to electrically connect the coil and the circuit board but also to mechanically connect the circuit board. However, poor soldering can lead to unreliable connections on the circuit board, affecting the product's operational reliability. Utility Model Content

[0005] This application provides a relay that improves upon the problem of unreliable circuit board connections in the prior art by mechanically connecting the coil frame to the circuit board.

[0006] The relay in this application embodiment includes:

[0007] The coil holder has a limiting protrusion; and

[0008] A circuit board is mechanically connected to the coil frame; the outer periphery of the circuit board is provided with a notch, and the limiting protrusion passes through the notch to limit the circuit board in the thickness direction of the circuit board and in the direction perpendicular to the axial direction of the coil frame and parallel to the circuit board.

[0009] According to some embodiments of this application, the relay further includes a coil wound around the outer periphery of the coil frame, and the coil is electrically connected to the circuit board;

[0010] The limiting protrusion includes a through portion and an abutting portion. The through portion passes through the notch, and the abutting portion is connected to the end of the through portion and abuts against the side surface of the circuit board facing away from the coil.

[0011] According to some embodiments of this application, the abutting portion includes two barbs protruding from the outer peripheral surface of the through portion. The two barbs are arranged opposite each other in a direction perpendicular to the axial direction of the coil frame and parallel to the circuit board, and respectively abut against the side surface of the circuit board facing away from the coil.

[0012] According to some embodiments of this application, the coil is electrically connected to the circuit board via a lead.

[0013] According to some embodiments of this application, the relay further includes:

[0014] A yoke plate includes a plate body and a positioning protrusion, wherein the positioning protrusion protrudes from one side surface of the plate body in the thickness direction;

[0015] The coil is mounted on the side of the plate body where the positioning protrusion is located; the coil frame also has a positioning hole, and the positioning protrusion is located within the positioning hole.

[0016] According to some embodiments of this application, a plurality of sub-protrusions are further provided between the outer peripheral surface of the positioning protrusion and the hole wall surface of the positioning hole, and the plurality of sub-protrusions are arranged along the circumferential direction of the positioning hole.

[0017] According to some embodiments of this application, the positioning hole has a plurality of sub-protrusions protruding from its wall surface, and the plurality of sub-protrusions abut against the outer peripheral surface of the positioning protrusion.

[0018] According to some embodiments of this application, each of the sub-protrusions has a guide ramp with an angle between the guide ramp and the axis of the positioning hole, the guide ramp being used to guide the positioning protrusion into the positioning hole.

[0019] According to some embodiments of this application, the coil frame has two positioning holes, and a line segment is formed between the centers of the two positioning holes, the line segment having a perpendicular line parallel to the plate body;

[0020] The arrangement of the multiple sub-protrusions within the two positioning holes is not symmetrical about the vertical line.

[0021] According to some embodiments of this application, the positioning protrusion is interference-fitted with a plurality of the sub-protrusions.

[0022] According to some embodiments of this application, the outer peripheral surface of the positioning protrusion is provided with a plurality of sub-protrusions, and the plurality of sub-protrusions abut against the inner wall surface of the positioning hole.

[0023] According to some embodiments of this application, the yoke plate includes two positioning protrusions, and a line segment is formed between the centers of the two positioning protrusions, the line segment having a perpendicular line parallel to the plate body;

[0024] The arrangement of the plurality of sub-protrusions on the outer periphery of the two positioning protrusions is not symmetrical about the vertical line.

[0025] According to some embodiments of this application, the plurality of sub-protrusions are interference-fitted with the positioning holes.

[0026] According to some embodiments of this application, the yoke plate includes a plurality of the positioning protrusions, the coil frame has a plurality of the positioning holes, and the plurality of positioning protrusions are respectively confined within the plurality of the positioning holes;

[0027] Each of the sub-protrusions between the corresponding positioning protrusion and the positioning hole is integrally protruding on one of the outer peripheral surface of the positioning protrusion and the hole wall surface of the positioning hole, and at least one set of multiple sub-protrusions between the corresponding positioning protrusion and the positioning hole abuts against the other of the outer peripheral surface of the positioning protrusion and the hole wall surface of the positioning hole.

[0028] According to some embodiments of this application, the coil frame includes a winding drum, a first flange, and a second flange, wherein the first flange is disposed at one axial end of the winding drum, and the second flange is disposed at the other axial end of the winding drum.

[0029] The limiting protrusion is provided on the outer periphery of one of the first flange and the second flange.

[0030] An embodiment of the above application has at least the following advantages or beneficial effects:

[0031] In this embodiment of the relay, the circuit board is connected to the coil frame via a locking protrusion and a notch, allowing the coil frame to mechanically connect to the circuit board. This ensures a secure connection and significantly improves the reliability of the relay. Furthermore, because the circuit board has a notch on its outer periphery, which is a semi-open structure, the locking protrusion does not restrict the circuit board in the opening direction of the notch. Instead, it restricts the circuit board only in the thickness direction and in the direction perpendicular to the coil frame and parallel to the circuit board. This facilitates the assembly and disassembly of the circuit board.

[0032] Furthermore, the yoke plate has positioning protrusions, and the coil frame has positioning holes. The positioning protrusions are confined within the positioning holes, thus ensuring the assembly accuracy between the yoke plate and the coil frame. Additionally, because the positioning protrusions are located on the yoke plate, their strength is increased. When the relay is subjected to strong vibrations, the positioning protrusions are less prone to breakage, and in conjunction with the positioning holes, they maintain a reliable positioning effect, ensuring the assembly accuracy between the yoke plate and the coil frame, thereby improving the overall reliability of the relay product.

[0033] Furthermore, the sub-protrusions in the two positioning holes are arranged in staggered directions. This arrangement can effectively reduce the assembly accuracy requirements between the yoke plate and the coil frame, and solve the problem that the two cannot be assembled due to manufacturing tolerances of the yoke plate and / or the coil frame. Attached Figure Description

[0034] Figure 1 This is a top view schematic diagram of a relay according to an exemplary embodiment.

[0035] Figure 2 It is along Figure 1 A cross-sectional view along section line AA.

[0036] Figure 3 This is a three-dimensional schematic diagram showing the coil frame and circuit board assembled according to an exemplary embodiment.

[0037] Figure 4 This is a side view schematic diagram of the coil holder and circuit board assembled according to an exemplary embodiment.

[0038] Figure 5 yes Figure 4 A magnified view of the area at point X1.

[0039] Figure 6 This is a schematic diagram of a circuit board according to an exemplary embodiment.

[0040] Figure 7 This is a schematic diagram of a coil frame according to an exemplary embodiment.

[0041] Figure 8 This is a schematic diagram showing the first limiting block being confined within the first socket according to another exemplary embodiment.

[0042] Figure 9 This is a schematic diagram showing the first limiting block being confined within the first socket according to yet another exemplary embodiment.

[0043] Figure 10 This is a schematic diagram showing the second limiting block being confined within the second socket according to another exemplary embodiment.

[0044] Figure 11 This is a schematic diagram showing the second limiting block being confined within the second socket according to yet another exemplary embodiment.

[0045] Figure 12 This is another perspective view showing the coil holder and circuit board assembled according to an exemplary embodiment.

[0046] Figure 13 This is a schematic diagram of a yoke plate according to an embodiment of this application.

[0047] Figure 14 This is a top view schematic diagram of a coil frame according to an embodiment of this application.

[0048] Figure 15 This is a schematic diagram of the yoke plate according to another embodiment of this application. Detailed Implementation

[0049] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0050] It is understood that the terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0051] like Figure 1 and Figure 2 As shown, the relay in this embodiment includes a housing 11, a base 12, an insulating cover 21, a yoke plate 25, a pair of stationary contacts 22, an arc-extinguishing part 26, a moving assembly 30, and a magnetic circuit part 40.

[0052] The outer casing 11 and the base 12 are connected to form a cavity for accommodating the insulating cover 21, at least a portion of the stationary contact 22, the arc-extinguishing part 26, the moving component 30, and the magnetic circuit part 40. The shape formed by the connection of the outer casing 11 and the base 12 can be a cuboid or a cylinder, and this application is not limited to either.

[0053] As an example, the housing 11 is a cuboid shape with an opening, and the base 12 is a generally plate-like structure. The base 12 covers the opening of the housing 11 to form a cavity for accommodating the insulating cover 21, at least a portion of the stationary contact 22, the arc extinguishing part 26, the moving component 30, and the magnetic circuit part 40.

[0054] Of course, in other embodiments, the outer shell 11 can be a plate-like structure, and the base 12 can be a cuboid shape with an opening. Alternatively, both the outer shell 11 and the base 12 can be cuboid shapes and have an opening on one side, with the opening of the outer shell 11 and the opening of the base 12 facing each other, and the outer shell 11 and the base 12, when fastened together, form a cavity for accommodating the insulating cover 21, at least a portion of the stationary contact 22, the arc extinguishing portion 26, the moving component 30, and the magnetic circuit portion 40.

[0055] In one embodiment, both the housing 11 and the base 12 are made of an insulating material, such as plastic, but not limited thereto.

[0056] like Figure 2 As shown, a pair of stationary contacts 22 are mounted on the top of the insulating cover 21. At least a portion of each stationary contact 22 is located inside the insulating cover 21, and each stationary contact 22 also has a stationary contact point at its bottom. The stationary contact point can be integrally or separately disposed at the bottom of the stationary contact 22. The housing 11 has two openings 111 corresponding to the top of the insulating cover 21, and the pair of stationary contacts 22 extend out of the outer surface of the housing 11 through the two openings 111. One stationary contact 22 serves as the terminal for current inflow, and the other stationary contact 22 serves as the terminal for current outflow.

[0057] In this embodiment of the application, the top of the insulating cover 21 has two mounting holes 211, the positions of which correspond to the positions of the two openings 111, and a pair of stationary contacts 22 are respectively inserted into the two mounting holes 211. Furthermore, each stationary contact 22 can be connected to the insulating cover 21 by welding, but this is not a limitation.

[0058] It is understood that the insulating cover 21 can be made of ceramic material, that is, the insulating cover 21 is a ceramic cover, but it is not limited thereto. For example, in other embodiments, the insulating cover 21 can also be made of plastic material.

[0059] In this embodiment, the insulating cover 21 is made of ceramic and is connected to the yoke plate 25 via a frame piece 24. The frame piece 24 can be a ring-shaped metal part, such as an iron-nickel alloy. One end of the frame piece 24 is connected to the edge of the opening of the insulating cover 21, for example, by laser welding, brazing, resistance welding, or adhesive bonding. The other end of the frame piece 24 is connected to the yoke plate 25, also by laser welding, brazing, resistance welding, or adhesive bonding. The frame piece 24 is provided between the insulating cover 21 and the yoke plate 25 to facilitate their connection.

[0060] Please continue reading. Figure 2 The moving component 30 is movably disposed within the cavity formed by the housing 11 and the base 12. The moving component 30 includes a moving contact 31, a first elastic element 32, and a push rod component 33.

[0061] For ease of explanation, the arrangement direction of a pair of stationary contacts 22 is defined as the first direction D1, and the movement direction of the moving component 30 is defined as the second direction D2, wherein the first direction D1 is perpendicular to the second direction D2. The direction perpendicular to both the first direction D1 and the second direction D2 is defined as the third direction D3.

[0062] The moving contact 31 is disposed inside the insulating cover 21, and the two ends of the moving contact 31 along the first direction D1 are respectively used to contact or separate from the bottom of a pair of stationary contacts 22.

[0063] The moving contact 31 may include a contact body and two moving contacts. The moving contacts may be separate parts, and the two moving contacts are connected to both ends of the contact body along the first direction D1. Of course, in other embodiments, the two moving contacts may also be integrally formed on both ends of the contact body along the first direction D1.

[0064] In addition, the moving contact can protrude from the side surface of the contact body facing the stationary contact 22, or it can be flush with the side surface of the contact body facing the stationary contact 22.

[0065] It should be noted that the moving component 30 may include one or more moving contacts 31, where multiple means two or more. When there are multiple moving contacts 31, the multiple moving contacts 31 are arranged side by side along the third direction D3, and each moving contact 31 is used at both ends along the first direction D1 to contact or separate from a pair of stationary contacts 22 respectively.

[0066] Multiple moving contacts 31, with their two ends along the first direction D1 respectively contacting a pair of stationary contacts 22, form a reliable parallel circuit. The number of contact points formed by the multiple moving contacts 31 and one stationary contact 22 is greater than or equal to two, achieving a current shunting effect. Furthermore, based on the principle that the magnitude of the electro-repulsive force is proportional to the square of the current, the magnitude of the electro-repulsive force at each contact point is significantly reduced, which is beneficial for improving short-circuit withstand capability and enhancing the reliability of the relay.

[0067] The push rod member 33 is movably inserted through the first through hole 251 of the yoke plate 25, and part of the push rod member 33 extends out of the side surface of the yoke plate 25 facing the stationary contact 22, and part of the push rod member 33 extends out of the side surface of the yoke plate 25 away from the stationary contact 22.

[0068] The moving contact 31 is movably mounted on the portion of the push rod member 33 that extends from the side surface of the yoke plate 25 toward the stationary contact 22. The first elastic member 32 is connected to the push rod member 33 and the moving contact 31 and is used to apply an elastic force to the moving contact 31 toward the stationary contact 22 to provide contact pressure.

[0069] As an example, the first elastic element 32 is a spring, but it is not limited to this.

[0070] A metal cover 27 is also provided on the side of the yoke plate 25 facing away from the stationary contact 22, and the metal cover 27 covers the first through hole 251 of the yoke plate 25. The portion of the push rod member 33 extending out of the side of the yoke plate 25 facing away from the stationary contact 22 is inserted into the metal cover 27.

[0071] Please continue reading. Figure 2 The magnetic circuit section 40 includes a moving iron core 41, a stationary iron core 42, a coil frame 43, and a coil 44. The coil frame 43 is a hollow cylindrical shape and is made of insulating material. The coil frame 43 is located on the side of the yoke plate 25 facing away from the stationary contact 22 and surrounds the outer periphery of the metal cover 27. The coil 44 is wound around the outer periphery of the coil frame 43.

[0072] The stationary iron core 42 is fixedly disposed within the metal cover 27, with a portion of the stationary iron core 42 inserted into the first through hole 251. The stationary iron core 42 has a second through hole 421, which corresponds in position to the first through hole 251, allowing the push rod member 33 to be movably inserted into both the first through hole 251 and the second through hole 421. The moving iron core 41 is movably disposed within the metal cover 27 and is positioned opposite the stationary iron core 42 in the second direction D2. The moving iron core 41 is connected to the push rod member 33 and is attracted by the stationary iron core 42 when the coil 44 is energized. The moving iron core 41 and the push rod member 33 can be connected by screwing, riveting, welding, or other methods.

[0073] like Figure 2 As shown, the magnetic circuit part 40 also includes a second elastic element 46, which is located inside the metal cover 27 and is disposed between the stationary iron core 42 and the moving iron core 41. It is used to reset the moving iron core 41 when the coil 44 is de-energized.

[0074] In one embodiment, the second elastic element 46 is a spring and is sleeved on the outer periphery of the push rod member 33.

[0075] It should be noted that when the coil 44 is energized, the stationary iron core 42 attracts the moving iron core 41 to move upward, and the moving iron core 41 can drive the push rod component 33 to move upward. When the moving contact 31 contacts the stationary contact 22, the moving contact 31 is stopped by the stationary contact 22, while the push rod component 33 will continue to move upward until it has completed its overtravel.

[0076] During the overtravel process, the first elastic element 32, after being squeezed by the push rod member 33, can provide elastic force to the moving contact 31 to provide contact pressure.

[0077] like Figure 2 As shown, the magnetic circuit section 40 also includes a U-shaped yoke 47 and a magnetic cylinder 45. The U-shaped yoke 47 includes a bottom yoke plate 471 and two side yoke plates 472. The two side yoke plates 472 are respectively connected to the two ends of the bottom yoke plate 471 along the first direction D1, and the two side yoke plates 472 are arranged opposite to each other along the first direction D1. The bottom yoke plate 471 is located on the side of the coil frame 43 facing away from the stationary contact 22, and the ends of the two side yoke plates 472 away from the bottom yoke plate 471 are respectively connected to the two ends of the yoke plate 25 along the first direction D1. The coil 44, the coil frame 43, the metal cover 27, and the moving iron core 41 are accommodated in the space enclosed by the bottom yoke plate 25, the U-shaped yoke 471, and the two side yoke plates 472. The magnetic cylinder 45 is sleeved on the outer periphery of the metal cover 27, and the magnetic cylinder 45 is located between the metal cover 27 and the coil frame 43.

[0078] Continue reading Figure 2 The base 12 is bonded to the side surface of the bottom yoke plate 471 facing away from the yoke plate 25. The bottom yoke plate 471 has an adhesive hole 4711. The side surface of the base 12 facing the bottom yoke plate 471 has a protrusion 121. The protrusion 121 is inserted into the adhesive hole 4711, and an adhesive layer is filled between the protrusion 121 and the hole wall of the adhesive hole 4711.

[0079] In this embodiment, an adhesive dispensing process is used to bond the base 12 to the side of the bottom yoke plate 471 facing away from the yoke plate 25, thereby improving the connection reliability between the base 12 and the U-shaped yoke 47. Simultaneously, the bottom yoke plate 471 has an adhesive-receiving hole 4711, and the base 12 has a protrusion 121 that inserts into the adhesive-receiving hole 4711. Adhesive can penetrate between the protrusion 121 and the wall of the adhesive-receiving hole 4711 to form an adhesive layer, increasing the adhesive bonding area and further improving the connection strength between the base 12 and the U-shaped yoke 47.

[0080] like Figure 2 As shown, the arc-extinguishing part 26 includes a permanent magnet 262, which is disposed on the outer surface of the insulating cover 21. By providing the permanent magnet 262 on the outer periphery of the insulating cover 21, a magnetic field can be formed around the stationary contact 22 and the moving contact 31. Therefore, through the action of the magnetic field, the electric arc generated between the stationary contact 22 and the moving contact 31 will be elongated in a direction away from each other, thus extinguishing the arc.

[0081] In this embodiment of the application, there are two permanent magnets 262, and the two permanent magnets 262 are respectively located on the two outer sides of the insulating cover 21 along the first direction D1.

[0082] The arc-extinguishing section 26 also includes a yoke clamp 261, with a permanent magnet 262 disposed between the side surface of the yoke clamp 261 facing the insulating cover 21 and the outer peripheral surface of the insulating cover 21. The design of the yoke clamp 261 surrounding the permanent magnet 262 prevents the magnetic field generated by the permanent magnet 262 from spreading outwards and affecting the arc-extinguishing effect.

[0083] In one embodiment, the yoke clip 261 is made of a soft magnetic material, which may include, but is not limited to, iron, cobalt, nickel, and their alloys.

[0084] It is understood that the number of yoke clips 261 can be one or two. When there is one yoke clip 261, the yoke clip 261 forms a ring structure and surrounds the outer periphery of the insulating cover 21. When there are two yoke clips 261, each yoke clip 261 can be U-shaped and arranged opposite each other along the first direction D1, with the two yoke clips 261 respectively surrounding the two ends of the insulating cover 21 along the first direction D1.

[0085] like Figure 3 As shown, the relay in this embodiment of the application also includes a circuit board 50, which is directly mechanically connected to the coil holder 43, and the coil 44 is electrically connected to the circuit board 50.

[0086] In the relay of this application embodiment, the circuit board 50 is directly mechanically connected to the coil holder 43, and the coil 44 is electrically connected to the circuit board 50. This allows the coil holder 43 to mechanically connect to the circuit board 50, while the coil 44 is only used for electrical connection to the circuit board 50 and does not serve as a mechanical connection to the circuit board 50. This avoids unreliable connection of the circuit board 50 due to poor electrical connection between the coil 44 and the circuit board 50, and significantly improves the reliability of the relay operation.

[0087] It is understood that, in one embodiment, coil 44 can be connected via lead 48 ( Figure 12 The lead 48 is electrically connected to the circuit board 50 by soldering, such as tin soldering, but not limited thereto. Specifically, the lead 48 is connected to the coil holder 43, and part of the lead 48 extends out of the coil holder 43. The end of the coil 44 is wound around the part of the lead 48 that extends out of the coil holder 43, and the lead 48 is inserted into the hole of the circuit board 50 and soldered.

[0088] Please continue reading. Figure 3The coil frame 43 includes a winding drum 431, a first flange 432, and a second flange 433. The first flange 432 is located at one axial end of the winding drum 431, and the second flange 433 is located at the other axial end of the winding drum 431. The coil 44 is wound around the outer circumference of the winding drum 431 and is positioned between the first flange 432 and the second flange 433. The first flange 432 and the second flange 433 are directly mechanically connected to the circuit board 50. The axial direction of the coil frame 43 is the same as the axial direction of the winding drum 431.

[0089] The winding drum 431 has a hollow structure, and the metal cover 27 and the magnetic tube 45 are located inside the cavity of the winding drum 431. The first flange 432 abuts against the yoke plate 25, and the second flange 433 is connected to the bottom yoke plate 471.

[0090] like Figures 4 to 7 As shown, at least one insertion block 435 protrudes from the outer periphery of one of the first flange 432 and the second flange 433; the circuit board 50 has at least one insertion hole 510, and at least one insertion block 435 is inserted into at least one insertion hole 510 in a corresponding manner; at least one insertion block 435 includes at least one first limiting block 4351; the first limiting block 4351 is limited within the insertion hole 510 in the axial direction (i.e., the second direction D2) of the winding drum 431 and in a direction perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50. For ease of explanation, the insertion hole 510 into which the first limiting block 4351 is inserted is defined as the first insertion hole 510a.

[0091] In this embodiment of the application, the first limiting block 4351 is positioned within the first insertion hole 510a in the axial direction (i.e., the second direction D2) of the winding drum 431 and in the direction perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50, so that the coil frame 43 is limited to the circuit board 50 and the circuit board 50 is connected in a limited manner, thereby ensuring the reliability of the connection of the circuit board 50.

[0092] It is understandable that the insert 435 can protrude from the outer periphery of the first flange 432 or from the outer periphery of the second flange 433. The following explanation will take the example of the insert 435 protruding from the outer periphery of the first flange 432, but it is not limited to this.

[0093] It should be noted that the circuit board 50 has at least one socket 510, meaning the number of sockets 510 can be one, two, three, or other numbers. Similarly, the outer periphery of the first flange 432 has at least one insert block 435, meaning the number of insert blocks 435 can be one, two, three, or other numbers. The number of sockets 510 and insert blocks 435 correspond.

[0094] When there is only one insertion block 435, then that insertion block 435 is the first limiting block 4351. When there are two or more insertion blocks 435, then the number of first limiting blocks 4351 can be one, two, or all of the insertion blocks 435 can be the first limiting blocks 4351.

[0095] In the embodiments of this application, there are two plug blocks 435 and two sockets 510, and one of the plug blocks 435 is a first limiting block 4351.

[0096] like Figure 5 and Figure 6 As shown, the wall surface of the first insertion hole 510a into which the first limiting block 4351 is inserted is also provided with a plurality of first limiting protrusions 511. The plurality of first limiting protrusions 511 are arranged along the circumference of the first insertion hole 510a, and the plurality of first limiting protrusions 511 abut against the outer circumferential surface of the first limiting block 4351.

[0097] In this embodiment of the application, the first limiting block 4351 contacts a plurality of first limiting protrusions 511, rather than directly contacting the hole wall of the first insertion hole 510a, thereby reducing the degree of wear between the first limiting block 4351 and the first insertion hole 510a.

[0098] The number of first limiting protrusions 511 can be two, three, four, or other numbers. Multiple first limiting protrusions 511 can be evenly or non-uniformly arranged along the circumference of the first insertion hole 510a.

[0099] In one embodiment, the first limiting block 4351 is interference-fitted with a plurality of first limiting sub-protrusions 511.

[0100] Of course, in other embodiments, the first limiting protrusion 511 may not be provided in the first insertion hole 510a into which the first limiting block 4351 is inserted. Instead, the first limiting block 4351 is inserted into the first insertion hole 510a, and the first limiting block 4351 is directly press-fitted or clearance-fitted with the first insertion hole 510a.

[0101] Please continue reading. Figure 5 and Figure 6 At least one insertion block 435 includes at least one second limiting block 4352. The second limiting block 4352 is positioned within the insertion hole 510 in the axial direction of the winding drum 431 or in a direction perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50. For ease of explanation, the insertion hole 510 into which the second limiting block 4352 is inserted is defined as the second insertion hole 510b.

[0102] In this embodiment, the first limiting block 4351 is positioned within the first insertion hole 510a in both the axial direction (i.e., the second direction D2) of the winding drum 431 and in a direction perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50. The second limiting block 4352 is positioned within the second insertion hole 510b in either the axial direction (i.e., the second direction D2) of the winding drum 431 or in a direction perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50. In other words, the first limiting block 4351 and the circuit board 50 are limited in two directions, providing precise positioning. The second limiting block 4352 and the circuit board 50 are limited in only one direction, while the other direction is unrestricted, preventing over-limitation. This configuration prevents the coil frame 43 and the circuit board 50 from failing to be properly positioned during assembly due to insufficient machining precision.

[0103] It should be noted that when there are two or more insert blocks 435, some insert blocks 435 are first limiting blocks 4351, and other insert blocks 435 are second limiting blocks 4352. In the embodiment of this application, there are two insert blocks 435, and one insert block 435 is the first limiting block 4351, and the other insert block 435 is the second limiting block 4352.

[0104] Furthermore, when there are two or more insert blocks 435, all insert blocks 435 can be first limit blocks 4351, but cannot all be second limit blocks 4352.

[0105] like Figure 5 and Figure 6 As shown, the second insertion hole 510b into which the second limiting block 4352 is inserted is further provided with a plurality of second limiting protrusions 512, which abut against the outer peripheral surface of the second limiting block 4352; the plurality of second limiting protrusions 512 are divided into two parts, and the two parts of the second limiting protrusions 512 are respectively arranged on two oppositely arranged hole walls in the second insertion hole 510b; wherein, the two hole walls are along the axial direction of the winding cylinder 431 ( Figure 6 (in the vertical direction) or perpendicular to the axis of the winding drum 431 and parallel to the direction of the circuit board 50. Figure 6 The left and right directions are set relative to each other.

[0106] In this embodiment of the application, the second limiting block 4352 contacts a plurality of second limiting protrusions 512, rather than directly contacting the hole wall surface of the second socket 510b, thereby reducing the degree of wear between the second limiting block 4352 and the second socket 510b.

[0107] The number of second limiting protrusions 512 can be two, three, four, or other numbers. In the embodiments of this application, the number of second limiting protrusions 512 is two, and the two second limiting protrusions 512 are arranged opposite to each other in the second direction D2, but this is not a limitation.

[0108] In one embodiment, the second limiting block 4352 is interference-fitted with a plurality of second limiting sub-protrusions 512.

[0109] It is understandable that the first limiting protrusion 511 may not protrude from the wall of the first insertion hole 510a, but may be located on the outer peripheral surface of the first limiting block 4351.

[0110] For example, such as Figure 8 As shown, the outer peripheral surface of the first limiting block 4351 is also provided with a plurality of first limiting protrusions 511. The plurality of first limiting protrusions 511 are arranged along the circumference of the first limiting block 4351, and the plurality of first limiting protrusions 511 abut against the inner wall surface of the first insertion hole 510a.

[0111] In one embodiment, a plurality of first limiting protrusions 511 are interference-fitted with the first insertion hole 510a.

[0112] For example, such as Figure 9 As shown, the outer peripheral surface of the first limiting block 4351 is also provided with a plurality of first limiting sub-protrusions 511, the plurality of first limiting sub-protrusions 511 abutting against the inner wall surface of the first insertion hole 510a, and part of the outer peripheral surface of the first limiting block 4351 also abutting against the inner wall surface of the first insertion hole 510a.

[0113] It is understandable that the second limiting protrusion 512 may not protrude from the wall of the second insertion hole 510b, but may be located on the outer peripheral surface of the second limiting block 4352.

[0114] For example, such as Figure 10 As shown, the outer peripheral surface of the second limiting block 4352 is also provided with a plurality of second limiting protrusions 512, which abut against the wall surface of the second insertion hole 510b. The plurality of second limiting protrusions 512 are divided into two parts, and the two parts of the second limiting protrusions 512 are respectively arranged on two opposite outer surfaces of the second limiting block 4352; wherein, the two outer surfaces are arranged opposite each other along the axial direction of the winding drum 431 or perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50.

[0115] In one embodiment, a plurality of second limiting protrusions 512 are interference-fitted with the second socket 510b.

[0116] In this embodiment of the application, there are two second limiting protrusions 512, and the two second limiting protrusions 512 are arranged opposite each other along the second direction D2, but this is not a limitation.

[0117] Furthermore, the design where the second limiting block 4352 and the second socket 510b are limited in only one direction and left open in the other direction can also be achieved by designing the shape of the second socket 510b as an oval shape instead of setting the second limiting protrusion 512.

[0118] For example, such as Figure 11 As shown, the second insertion hole 510b into which the second limiting block 4352 is inserted is oval in shape, and the cross-sectional shape of the second limiting block 4352 is circular; the second limiting block 4352 is limited between the two straight sides of the oval shape. The two straight sides of the oval shape can be arranged opposite each other in the axial direction (second direction D2) of the winding drum 431, or they can be arranged opposite each other in a direction perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50.

[0119] like Figure 6 , Figure 7 and Figure 12 As shown, the outer periphery of the first flange 432 and the second flange 433 is provided with a limiting protrusion 436; the outer periphery of the circuit board 50 is also provided with a notch 520, through which the limiting protrusion 436 passes to limit the circuit board 50 in the thickness direction of the circuit board 50 and in the direction perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50.

[0120] It should be noted that the limiting protrusion 436 can protrude from either the outer periphery of the first flange 432 or the outer periphery of the second flange 433. In other words, the insert block 435 and the limiting protrusion 436 protrude from the outer periphery of the first flange 432 and the outer periphery of the second flange 433, respectively. The following explanation will take the example of the limiting protrusion 436 protruding from the second flange 433, but this should not be considered a limitation.

[0121] It is understandable that since the outer periphery of the circuit board 50 is provided with a notch 520, which is a semi-open structure, the limiting protrusion 436 does not limit the circuit board 50 in the opening direction of the notch 520, but only limits the circuit board 50 in the thickness direction and in the axial direction of the vertical winding drum 431 and in the direction parallel to the circuit board 50, so as to facilitate the disassembly and assembly of the circuit board 50.

[0122] Therefore, in the relay of this application embodiment, when assembling the circuit board 50 and the coil frame 43, the opening of the circuit board 50 is first aligned with the limiting protrusion 436, and the limiting protrusion 436 is passed through the notch 520. Then, the circuit board 50 is rotated around the position where the circuit board 50 contacts the limiting protrusion 436, so that the insert 435 is inserted into the socket 510. Thus, the circuit board 50 and the coil frame 43 have completed the limiting assembly.

[0123] In one embodiment, the position of the limiting protrusion 436 corresponds to that of at least one insert 435 in the axial direction (second direction D2) of the winding drum 431, so that the positions of at least one insertion hole 510 and notch 520 of the circuit board 50 correspond in the axial direction (second direction D2) of the winding drum 431.

[0124] Please continue reading. Figure 6 , Figure 7 and Figure 12 The limiting protrusion 436 includes a through portion 4361 and an abutment portion 4362. The through portion 4361 protrudes from the outer periphery of the other of the first flange 432 and the second flange 433 and passes through the notch 520. The abutment portion 4362 is connected to the end of the through portion 4361 and abuts against the side surface of the circuit board 50 facing away from the coil 44.

[0125] In this embodiment of the application, the through portion 4361 protrudes from the outer periphery of the second flange 433, and the abutting portion 4362 is connected to the end of the through portion 4361 away from the second flange 433.

[0126] The abutment portion 4362 includes two barbs 4363 protruding from the outer peripheral surface of the through portion 4361. The two barbs 4363 are arranged opposite each other in a direction perpendicular to the axial direction of the winding bobbin 431 and parallel to the circuit board 50, and respectively abut against the side surface of the circuit board 50 facing away from the coil 44. The circuit board 50 can be limited by the two barbs 4363.

[0127] Therefore, the limiting protrusion 436 provided in the coil frame 43 of this application embodiment not only facilitates the installation of the circuit board 50, but also limits the circuit board 50.

[0128] In one embodiment, the orthographic projection of the abutment portion 4362 onto the plane containing the surface of the first flange 432 facing the second flange 433 is dovetail-shaped. Of course, the shape of the abutment portion 4362 is not limited to a dovetail shape.

[0129] like Figure 7 As shown, the insert 435 has an inclined surface 4353 on the side opposite to the limiting protrusion 436. The inclined surface 4353 is inclined relative to the thickness direction of the circuit board 50 to guide the insert 435 into the socket 510.

[0130] In this embodiment of the application, when the limiting protrusion 436 passes through the notch 520 and the circuit board 50 is rotated about the position where the circuit board 50 contacts the limiting protrusion 436, the inclined surface 4353 can make guiding contact with the hole wall of the socket 510 to guide the plug 435 to be accurately inserted into the socket 510.

[0131] like Figure 7 and Figure 13As shown, the yoke plate 25 includes a plate body 252 and a positioning protrusion 253, which protrudes from one side surface of the plate body 252 in the thickness direction (second direction D2). The coil frame 43 is disposed on the side of the plate body 252 where the positioning protrusion 253 protrudes; the coil frame 43 has a positioning hole 434, and the positioning protrusion 253 is confined within the positioning hole 434.

[0132] It is understood that in the relay of this application embodiment, the yoke plate 25 has a positioning protrusion 253, and the coil frame 43 has a positioning hole 434. The positioning protrusion 253 is confined within the positioning hole 434, thereby ensuring the assembly accuracy between the yoke plate 25 and the coil frame 43. In addition, since the positioning protrusion 253 is provided on the yoke plate 25, the positioning protrusion 253 is stronger. When the relay is in a strong vibration environment, the positioning protrusion 253 is not easy to break, and with the cooperation of the positioning hole 434, it can still maintain a reliable positioning effect, ensuring the assembly accuracy between the yoke plate 25 and the coil frame 43, thereby improving the working reliability of the entire relay product.

[0133] In one embodiment, the yoke plate 25 is made of metal, and the coil frame 43 is made of insulating material. Further, the insulating material can be plastic, but is not limited thereto.

[0134] It should be noted that the number of positioning protrusions 253 included in the yoke plate 25 can be one or more, and the number of positioning holes 434 included in the coil frame 43 can be one or more. The number of positioning protrusions 253 corresponds to the number of positioning holes 434.

[0135] When there is only one positioning protrusion 253 and one positioning hole 434, the cross-sectional shape of the positioning protrusion 253 is non-circular, such as rectangular, elliptical, or triangular, and the shape of the positioning hole 434 is adapted to the cross-sectional shape of the positioning protrusion 253.

[0136] When there are multiple positioning protrusions 253 and multiple positioning holes 434, the cross-sectional shape of the positioning protrusion 253 can be circular or non-circular, and the shape of the positioning hole 434 is adapted to the cross-sectional shape of the positioning protrusion 253. Multiple positioning holes 434 can restrict the relative rotation between the yoke plate 25 and the coil frame 43.

[0137] like Figure 13 As shown in the embodiment of this application, the yoke plate 25 includes two positioning protrusions 253, which are spaced apart along the first direction D1. Each positioning protrusion 253 is cylindrical, but not limited thereto.

[0138] Please continue reading. Figure 7The first flange 432 is provided with two positioning holes 434, which are spaced apart along the first direction D1, and each positioning hole 434 is circular in shape. Each positioning hole 434 can be a blind hole or a through hole. In this embodiment, the positioning hole 434 is a blind hole.

[0139] like Figure 14 As shown, the positioning hole 434 is further provided with a plurality of sub-protrusions 254 on the hole wall surface. The plurality of sub-protrusions 254 are arranged along the circumference of the positioning hole 434 and abut against the outer circumferential surface of the positioning protrusion 253.

[0140] It should be noted that the sub-protrusions 254 in the multiple positioning holes 434 may all abut against the outer peripheral surface of the positioning protrusion 253, or some of the sub-protrusions 254 in the positioning holes 434 may abut against the outer peripheral surface of the positioning protrusion 253, while the remaining sub-protrusions 254 in the positioning holes 434 may abut against the outer peripheral surface of the positioning protrusion 253 or may not abut against the outer peripheral surface of the positioning protrusion 253.

[0141] It is understood that, in another embodiment, the sub-protrusion 254 may also protrude from the outer peripheral surface of the positioning protrusion 253 and abut against the hole wall surface of the positioning hole 434, as will be described in detail below.

[0142] In another embodiment, the arrangement of the multiple sub-protrusions 254 between the outer peripheral surface of the corresponding positioning protrusion 253 and the hole wall surface of the positioning hole 434 can also be: some sub-protrusions 254 protrude from the outer peripheral surface of the positioning protrusion 253, and the remaining sub-protrusions 254 protrude from the hole wall surface of the positioning hole 434.

[0143] In the embodiments of this application, the positioning protrusion 253 of the yoke plate 25 contacts multiple sub-protrusions 254, rather than directly contacting the hole wall of the positioning hole 434, thereby reducing the wear between the positioning protrusion 253 and the positioning hole 434 and further improving the reliability of positioning.

[0144] The number of sub-protrusions 254 within a positioning hole 434 can be two, three, four, or other numbers. Multiple sub-protrusions 254 can be evenly or non-uniformly arranged along the circumference of the positioning hole 434.

[0145] In one embodiment, the positioning protrusion 253 is interference-fitted with a plurality of sub-protrusions 254.

[0146] Of course, in other embodiments, the sub-protrusion 254 may not be provided in the positioning hole 434. Instead, the positioning protrusion 253 is inserted into the positioning hole 434, and the positioning protrusion 253 and the positioning hole 434 are either interference fit or clearance fit.

[0147] Please continue reading. Figure 14As shown, a line segment AB is formed between the centers of the two positioning holes 434, and the line segment AB has a perpendicular line L1 parallel to the plate body 252; the arrangement of the multiple sub-protrusions 254 in the two positioning holes 434 is not symmetrical about the perpendicular line L1.

[0148] The following is an example of a positioning hole 434 with three sub-protrusions 254. Figure 7 The three sub-protrusions 254 within the positioning hole 434 on the left are located at the 10 o'clock, 2 o'clock, and 6 o'clock positions within the positioning hole 434, respectively, while the three sub-protrusions 254 within the positioning hole 434 on the right are located at the 12 o'clock, 4 o'clock, and 8 o'clock positions within the positioning hole 434, respectively. In other words, the arrangement of the three sub-protrusions 254 within the two positioning holes 434 is staggered. This arrangement can effectively reduce the assembly precision requirements between the yoke plate 25 and the coil frame 43, and solve the problem of the two being unable to be assembled due to manufacturing tolerances of the yoke plate 25 and / or the coil frame 43.

[0149] Please return to the reference. Figure 7 Each sub-protrusion 254 has a guide ramp 2541, which forms an angle with the axis of the positioning hole 434. The guide ramp 2541 guides the positioning protrusion 253 into the positioning hole 434. By providing the guide ramp 2541 on the sub-protrusion 254, when the yoke plate 25 is assembled with the coil frame 43, the guide ramp 2541 can guide the positioning protrusion 253 to be accurately inserted into the positioning hole 434.

[0150] like Figure 15 As shown, it can be understood that in other embodiments, the sub-protrusion 254 may not be disposed in the positioning hole 434, but may be disposed on the positioning protrusion 253.

[0151] like Figure 15 As shown, specifically, the outer peripheral surface of the positioning protrusion 253 is further provided with a plurality of sub-protrusions 254. The plurality of sub-protrusions 254 are arranged circumferentially along the positioning protrusion 253 and abut against the inner wall surface of the positioning hole 434. The plurality of sub-protrusions 254 of the plurality of positioning protrusions 253 may all abut against the inner wall surface of the positioning hole 434, or some of the sub-protrusions 254 of the positioning protrusion 253 may abut against the inner wall surface of the positioning hole 434, while the remaining sub-protrusions 254 of the positioning protrusion 253 may or may not abut against the inner wall surface of the positioning hole 434.

[0152] In one embodiment, the positioning hole 434 is interference-fitted with a plurality of sub-protrusions 254.

[0153] Of course, in other embodiments, the sub-protrusion 254 may not be provided in the positioning hole 434. Instead, the positioning protrusion 253 is inserted into the positioning hole 434, and the positioning protrusion 253 and the positioning hole 434 are either interference fit or clearance fit.

[0154] In one embodiment, the yoke plate 25 includes two positioning protrusions 253, and a line segment CD is formed between the centers of the two positioning protrusions 253. The line segment CD has a perpendicular line L2 parallel to the plate body 252. The arrangement direction of a plurality of sub-protrusions 254 on the outer periphery of the two positioning protrusions 253 is not symmetrical about the perpendicular line L2.

[0155] Understandably, the arrangement of the three sub-protrusions 254 on the outer periphery of the two positioning protrusions 253 is staggered. This arrangement can effectively reduce the assembly accuracy requirements between the yoke plate 25 and the coil frame 43, and solve the problem that the two cannot be assembled due to manufacturing tolerances of the yoke plate 25 and / or the coil frame 43.

[0156] In summary, the relays of the embodiments of this application have at least the following advantages and beneficial effects:

[0157] In this embodiment of the relay, the circuit board 50 is connected to the coil frame 43 by a limiting protrusion 436 engaging with the notch 520. This allows the coil frame 43 to mechanically connect to the circuit board, ensuring a secure connection and significantly improving the reliability of the relay. Furthermore, since the circuit board 50 has a notch 520 on its outer periphery, and the notch 520 is a semi-open structure, the limiting protrusion 436 does not limit the circuit board 50 in the opening direction of the notch 520. Instead, it limits the circuit board 50 only in the thickness direction and in the axial direction perpendicular to the winding drum 431 and parallel to the circuit board 50, facilitating the assembly and disassembly of the circuit board 50.

[0158] Furthermore, the yoke plate 25 has a positioning protrusion 253, and the coil frame 43 has a positioning hole 434. The positioning protrusion 253 is confined within the positioning hole 434, thereby ensuring the assembly accuracy between the yoke plate 25 and the coil frame 43. In addition, since the positioning protrusion 253 is set on the yoke plate 25, the positioning protrusion 253 is stronger. When the relay is in a strong vibration environment, the positioning protrusion 253 is not easy to break, and with the cooperation of the positioning hole 434, it can still maintain a reliable positioning effect, ensuring the assembly accuracy between the yoke plate 25 and the coil frame 43, thereby improving the overall reliability of the relay product.

[0159] Furthermore, the sub-protrusions 254 within the two positioning holes 434 are arranged in staggered directions. This arrangement can effectively reduce the assembly accuracy requirements between the yoke plate 25 and the coil frame 43, and solve the problem that the two cannot be assembled due to manufacturing tolerances of the yoke plate 25 and / or the coil frame 43.

[0160] It is understood that the various embodiments / implementations provided in this application can be combined with each other without creating contradictions, and will not be described one by one here.

[0161] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0162] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the application.

[0163] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the claims. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0164] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. A relay, characterized in that, include: The coil frame has a limiting protrusion; as well as A circuit board is mechanically connected to the coil frame; the outer periphery of the circuit board is provided with a notch, and the limiting protrusion passes through the notch to limit the circuit board in the thickness direction of the circuit board and in the direction perpendicular to the axial direction of the coil frame and parallel to the circuit board.

2. The relay according to claim 1, characterized in that, The relay further includes a coil wound around the outer periphery of the coil frame, and the coil is electrically connected to the circuit board; The limiting protrusion includes a through portion and an abutting portion. The through portion passes through the notch, and the abutting portion is connected to the end of the through portion and abuts against the side surface of the circuit board facing away from the coil.

3. The relay according to claim 2, characterized in that, The abutting portion includes two barbs protruding from the outer peripheral surface of the through portion. The two barbs are arranged opposite each other in a direction perpendicular to the axial direction of the coil frame and parallel to the circuit board, and respectively abut against the side surface of the circuit board facing away from the coil.

4. The relay according to claim 2, characterized in that, The coil is electrically connected to the circuit board via a lead.

5. The relay according to any one of claims 1 to 4, characterized in that, The relay also includes: A yoke plate includes a plate body and a positioning protrusion, wherein the positioning protrusion protrudes from one side surface of the plate body in the thickness direction; The coil is mounted on the side of the plate body where the positioning protrusion is located; the coil frame also has a positioning hole, and the positioning protrusion is located within the positioning hole.

6. The relay according to claim 5, characterized in that, A plurality of sub-protrusions are provided between the outer peripheral surface of the positioning protrusion and the wall surface of the positioning hole, and the plurality of sub-protrusions are arranged along the circumference of the positioning hole.

7. The relay according to claim 6, characterized in that, The positioning hole has a plurality of sub-protrusions protruding from its wall surface, and the plurality of sub-protrusions abut against the outer peripheral surface of the positioning protrusion.

8. The relay according to claim 7, characterized in that, Each of the sub-protrusions has a guide ramp at an angle to the axis of the positioning hole, the guide ramp being used to guide the positioning protrusion into the positioning hole.

9. The relay according to claim 7, characterized in that, The coil frame has two positioning holes, and a line segment is formed between the centers of the two positioning holes. The line segment has a perpendicular line parallel to the plate body. The arrangement of the multiple sub-protrusions within the two positioning holes is not symmetrical about the vertical line.

10. The relay according to claim 7, characterized in that, The positioning protrusion is interference-fitted with the plurality of the sub-protrusions.

11. The relay according to claim 6, characterized in that, The outer peripheral surface of the positioning protrusion is provided with a plurality of sub-protrusions, and the plurality of sub-protrusions abut against the inner wall surface of the positioning hole.

12. The relay according to claim 11, characterized in that, The yoke plate includes two positioning protrusions, and a line segment is formed between the centers of the two positioning protrusions. The line segment has a perpendicular line parallel to the plate body. The arrangement of the plurality of sub-protrusions on the outer periphery of the two positioning protrusions is not symmetrical about the vertical line.

13. The relay according to claim 11, characterized in that, The plurality of sub-protrusions are interference-fitted with the positioning holes.

14. The relay according to claim 6, characterized in that, The yoke plate includes a plurality of positioning protrusions, and the coil frame has a plurality of positioning holes, with the plurality of positioning protrusions respectively confined within the plurality of positioning holes; Each of the sub-protrusions between the corresponding positioning protrusion and the positioning hole is integrally protruding on one of the outer peripheral surface of the positioning protrusion and the hole wall surface of the positioning hole, and at least one set of multiple sub-protrusions between the corresponding positioning protrusion and the positioning hole abuts against the other of the outer peripheral surface of the positioning protrusion and the hole wall surface of the positioning hole.

15. The relay according to claim 1, characterized in that, The coil frame includes a winding drum, a first flange, and a second flange. The first flange is located at one axial end of the winding drum, and the second flange is located at the other axial end of the winding drum. The limiting protrusion is provided on the outer periphery of one of the first flange and the second flange.

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