Relay

Abstract

The invention discloses a relay which comprises a coil frame, a coil and a circuit board. The coil is wound on the periphery of the coil rack; the circuit board is directly and mechanically connected with the coil rack, and the coil is electrically connected with the circuit board. The coil rack plays a role in mechanical connection with the circuit board, and the coil is only used for being electrically connected with the circuit board and does not play a role in mechanical connection with the circuit board, so that unreliable circuit board connection caused by poor electrical connection between the coil and the circuit board can be avoided, and the working reliability of the relay is remarkably improved.

Description

Technical Field

[0001] The present application relates to the technical field of electric control devices, and in particular to a relay. Background Art

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

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

[0004] In existing technology, the coil is connected to the circuit board via lead pins using soldering. This soldering connection not only electrically connects the coil and circuit board, but also mechanically connects the circuit board. However, poor soldering can lead to unreliable connections on the circuit board, compromising product reliability. Furthermore, vibration and shock can cause solder joints to loosen or become non-conductive, potentially causing relay failure. Summary of the Invention

[0005] An embodiment of the present application provides a relay, which improves the problem of unreliable circuit board connection in the prior art by mechanically connecting a coil frame to a circuit board and electrically connecting a coil to a circuit board.

[0006] The relay of the embodiment of the present application includes:

[0007] Coil former;

[0008] a coil wound around the outer circumference of the coil bobbin; and

[0009] The circuit board is directly mechanically connected to the coil frame, and the coil is electrically connected to the circuit board.

[0010] According to some embodiments of the present application, the coil frame includes a bobbin, a first flange, and a second flange, wherein the first flange is provided at one axial end of the bobbin, and the second flange is provided at the other axial end of the bobbin, and the coil is wound around the outer circumference of the bobbin and provided between the first flange and the second flange;

[0011] The first flange and the second flange are respectively directly mechanically connected to the circuit board.

[0012] According to some embodiments of the present application, at least one plug is protruded from the outer periphery of one of the first flange and the second flange;

[0013] The circuit board is provided with at least one plug hole, and the at least one plug block is inserted into the at least one plug hole in a one-to-one correspondence;

[0014] The at least one insert block includes at least one first limiting block;

[0015] The first limiting block is limited in the insertion hole in the axial direction of the winding drum and in a direction perpendicular to the axial direction of the winding drum and parallel to the circuit board.

[0016] According to some embodiments of the present application, a plurality of first limiting sub-protrusions are further provided between the outer circumferential surface of the first limiting block and the hole wall surface of the jack, and the plurality of first limiting sub-protrusions are arranged along the circumference of the jack.

[0017] According to some embodiments of the present application, a plurality of first limiting sub-protrusions are convexly provided on the wall surface of the hole into which the first limiting block is inserted, and the plurality of first limiting sub-protrusions abut against the outer peripheral surface of the first limiting block.

[0018] According to some embodiments of the present application, the first limiting block is interference fit with the plurality of first limiting sub-protrusions.

[0019] According to some embodiments of the present application, a plurality of first limiting sub-protrusions are convexly provided on the outer peripheral surface of the first limiting block, and the plurality of first limiting sub-protrusions abut against the inner wall surface of the insertion hole.

[0020] According to some embodiments of the present application, the plurality of first limiting protrusions are interference fit with the socket.

[0021] According to some embodiments of the present application, the at least one insert block includes at least one second limiting block;

[0022] The second limiting block is limited in the insertion hole in the axial direction of the winding drum or in a direction perpendicular to the axial direction of the winding drum and parallel to the circuit board.

[0023] According to some embodiments of the present application, a plurality of second limiting protrusions are further provided between the outer peripheral surface of the second limiting block and the hole wall surface of the jack.

[0024] According to some embodiments of the present application, a plurality of second limiting protrusions are convexly provided on the wall surface of the insertion hole into which the second limiting block is inserted; the plurality of second limiting protrusions abut against the outer peripheral surface of the second limiting block;

[0025] The plurality of second limiting sub-protrusions are divided into two parts, and the two parts of the second limiting sub-protrusions are respectively arranged on two oppositely disposed hole walls in the socket; wherein the two hole walls are oppositely disposed along the axial direction of the winding drum or perpendicular to the axial direction of the winding drum and parallel to the direction of the circuit board.

[0026] According to some embodiments of the present application, the second limiting block is interference fit with the plurality of second limiting sub-protrusions.

[0027] According to some embodiments of the present application, a plurality of second limiting protrusions are convexly provided on the outer peripheral surface of the second limiting block; the plurality of second limiting protrusions abut against the wall surface of the insertion hole;

[0028] The multiple second limiting sub-protrusions are divided into two parts, and the two parts of the second limiting sub-protrusions are respectively arranged on two oppositely set outer surfaces of the second limiting block; wherein, the two outer surfaces are relatively arranged along the axial direction of the winding drum or perpendicular to the axial direction of the winding drum and parallel to the direction of the circuit board.

[0029] According to some embodiments of the present application, a plurality of the second limiting protrusions are interference fit with the socket.

[0030] According to some embodiments of the present application, the shape of the insertion hole into which the second limiting block is inserted is waist-round, and the cross-sectional shape of the second limiting block is circular;

[0031] The second limiting block is limited between the two straight sides of the waist-shaped body.

[0032] According to some embodiments of the present application, a limiting protrusion is provided on the outer periphery of the other of the first flange and the second flange;

[0033] The outer periphery of the circuit board is further provided with a notch, and the limiting protrusion passes through the notch and is used to limit the circuit board in the thickness direction of the circuit board and in a direction perpendicular to the axial direction of the winding drum and parallel to the circuit board.

[0034] According to some embodiments of the present application, the limiting protrusion includes a through portion and an abutment portion, the through portion protrudes from the outer periphery of the other of the first flange and the second flange and passes through the notch, and the abutment 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.

[0035] According to some embodiments of the present application, the abutment portion includes two barbs protruding from the outer peripheral surface of the through portion, and the two barbs are arranged relative to each other in a direction perpendicular to the axial direction of the winding reel and parallel to the circuit board, and respectively abut against the side surface of the circuit board facing away from the coil.

[0036] According to some embodiments of the present application, the insert block has an inclined surface on a side facing away from the limiting protrusion, and the inclined surface is inclined relative to the thickness direction of the circuit board to guide the insert block to be inserted into the socket.

[0037] According to some embodiments of the present application, the coil is electrically connected to the circuit board via lead pins.

[0038] One embodiment of the above application has at least the following advantages or beneficial effects:

[0039] In the relay of the embodiment of the present application, the circuit board is directly mechanically connected to the coil frame, and the coil is electrically connected to the circuit board, so that the coil frame plays the role of mechanically connecting the circuit board, improving the firmness of the circuit board connection, thereby ensuring the reliability of the electrical connection between the coil and the circuit board, and significantly improving the reliability of the relay operation.

[0040] At the same time, when the relay is in a high vibration environment, the circuit board and the coil frame are stably connected, which can prevent the vibration force from being transmitted to the circuit board and causing poor electrical connection between the coil and the circuit board, such as solder joint failure or lead pin deformation.

[0041] Furthermore, the first stopper limits the position between the coil bobbin and the circuit board in two directions, providing precise positioning. The second stopper limits the position between the coil bobbin and the circuit board in only one direction, leaving the other direction free to prevent excessive positioning. This arrangement prevents problems with the coil bobbin and circuit board being unable to be positioned correctly due to inaccurate machining of the coil bobbin and / or circuit board.

[0042] Furthermore, since a notch is provided on the outer periphery of the circuit board and the notch is a semi-open structure, the limiting protrusion does not limit the circuit board in the opening direction of the notch, but only limits the circuit board in the thickness direction of the circuit board and in the axial direction perpendicular to the winding drum and parallel to the circuit board, thereby facilitating the disassembly and assembly of the circuit board.

[0043] Furthermore, under the joint action of the plug block and the socket, as well as the limiting protrusion and the notch, when the circuit board and the coil frame are disassembled and assembled, the circuit board and the coil frame have movable space in the second direction, which facilitates the disassembly and assembly of the two and avoids the deformation of the coil frame affecting the normal assembly of the circuit board and the coil frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a schematic top view of a relay according to an exemplary embodiment.

[0045] Figure 2 It is along Figure 1 Sectional view along the AA cutting line.

[0046] Figure 3 FIG1 is a perspective schematic diagram showing a coil bobbin and a circuit board after assembly according to an exemplary embodiment.

[0047] Figure 4 FIG. 1 is a schematic side view of a coil bobbin and a circuit board after assembly according to an exemplary embodiment.

[0048] Figure 5 yes Figure 4 A local enlarged view of point X1 in the middle.

[0049] Figure 6 is a schematic diagram of a circuit board according to an exemplary embodiment.

[0050] Figure 7 is a schematic diagram of a coil bobbin according to an exemplary embodiment.

[0051] Figure 8 is a schematic diagram showing that the first limiting block is limited within the first insertion hole according to another exemplary embodiment.

[0052] Figure 9 FIG. 1 is a schematic diagram showing that the first limiting block is limited in the first insertion hole according to another exemplary embodiment.

[0053] Figure 10 FIG. 1 is a schematic diagram showing that the second limiting block is limited in the second insertion hole according to another exemplary embodiment.

[0054] Figure 11 is a schematic diagram showing that the second limiting block is limited in the second insertion hole according to another exemplary embodiment.

[0055] Figure 12 FIG. 1 is another perspective schematic diagram showing the assembled coil bobbin and circuit board according to an exemplary embodiment.

[0056] Figure 13 Schematic diagram of a yoke plate according to an embodiment of the present application.

[0057] Figure 14 1 is a schematic top view of a coil frame according to an embodiment of the present application.

[0058] Figure 15 It is a schematic diagram of a yoke plate according to another embodiment of the present application. DETAILED DESCRIPTION

[0059] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0060] It is understood that the terms "including" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to the process, method, product, or apparatus.

[0061] like Figure 1 and Figure 2 As shown, the relay of the embodiment of the present application includes a housing 11, a base 12, an insulating cover 21, a yoke iron plate 25, a pair of static contacts 22, an arc extinguishing part 26, a moving component 30 and a magnetic circuit part 40.

[0062] The housing 11 and the base 12 are connected to form a chamber for accommodating the insulating cover 21, at least a portion of the static contact 22, the arc extinguishing portion 26, the moving assembly 30, and the magnetic circuit portion 40. The shape formed by the connection of the housing 11 and the base 12 can be a rectangular parallelepiped or a cylindrical shape, which is not limited in this application.

[0063] As an example, the housing 11 is in the shape of a rectangle with an opening, and the base 12 is roughly a plate-like structure. The base 12 covers the opening of the housing 11 to form a chamber for accommodating the insulating cover 21, at least part of the static contact 22, the arc extinguishing part 26, the moving component 30 and the magnetic circuit part 40.

[0064] Of course, in other embodiments, the housing 11 may be a plate-like structure, and the base 12 may be a rectangular parallelepiped with an opening. Alternatively, the housing 11 and the base 12 may both be rectangular parallelepipeds with an opening on one side, the opening of the housing 11 being opposite to the opening of the base 12, and the housing 11 and the base 12 being fastened together to form a chamber for accommodating the insulating cover 21, at least a portion of the static contact 22, the arc extinguishing portion 26, the moving assembly 30, and the magnetic circuit portion 40.

[0065] In one embodiment, the housing 11 and the base 12 are both made of insulating materials, such as plastic, but not limited thereto.

[0066] like Figure 2As shown, a pair of static contacts 22 are mounted on top of the insulating cover 21, with at least a portion of each static contact 22 located within the insulating cover 21. A static contact point is also provided at the bottom of each static contact 22, which may be integrally or separately provided at the bottom of the static contact 22. Two openings 111 are provided at positions corresponding to the top of the insulating cover 21 on the housing 11, through which the pair of static contacts 22 extend from the outer surface of the housing 11. One static contact 22 serves as a terminal for current inflow, while the other static contact 22 serves as a terminal for current outflow.

[0067] In the embodiment of the present application, the top of the insulating cover 21 has two mounting holes 211 defined therein. The positions of the two mounting holes 211 correspond to the positions of the two openings 111, and a pair of static contacts 22 are respectively disposed within the two mounting holes 211. Furthermore, each static contact 22 can be connected to the insulating cover 21 by welding, but the present invention is not limited thereto.

[0068] It is understandable that the insulating cover 21 may be made of ceramic material, that is, the insulating cover 21 is a ceramic cover, but is not limited thereto. For example, in other embodiments, the insulating cover 21 may also be made of plastic material.

[0069] In an embodiment of the present application, the insulating cover 21 is made of ceramic material, and the insulating cover 21 is connected to the yoke iron plate 25 through a frame piece 24. The frame piece 24 can be a metal piece with an annular structure, such as an iron-nickel alloy. One end of the frame piece 24 is connected to the opening edge of the insulating cover 21, for example, by laser welding, brazing, resistance welding, gluing, etc. The other end of the frame piece 24 is connected to the yoke iron plate 25, which can also be done by laser welding, brazing, resistance welding, gluing, etc. A frame piece 24 is provided between the insulating cover 21 and the yoke iron plate 25 to facilitate the connection between the insulating cover 21 and the yoke iron plate 25.

[0070] Please continue reading Figure 2 The movable assembly 30 is movably disposed in a cavity formed by the housing 11 and the base 12. The movable assembly 30 includes a movable contact 31, a first elastic member 32 and a push rod member 33.

[0071] For ease of explanation, the arrangement direction of the pair of static contacts 22 is defined as the first direction D1, and the moving direction of the movable assembly 30 is defined as the second direction D2, wherein the first direction D1 is perpendicular to the second direction D2. A direction perpendicular to both the first direction D1 and the second direction D2 is defined as the third direction D3.

[0072] The moving contact 31 is disposed in the insulating cover 21 , and two ends of the moving contact 31 along the first direction D1 are respectively used to contact or separate from the bottoms of the pair of static contacts 22 .

[0073] The movable contact 31 may include a contact body and two movable contacts. The movable contacts may be separate parts, and the two movable contacts are connected to both ends of the contact body along the first direction D1. Of course, in other embodiments, the two movable contacts may also be integrally formed at both ends of the contact body along the first direction D1.

[0074] In addition, the movable contact may protrude from the surface of the contact body facing the static contact 22 , or may be flush with the surface of the contact body facing the static contact 22 .

[0075] It should be noted that the movable assembly 30 may include one or more movable contacts 31, where "a plurality" refers to more than two. When there are multiple movable contacts 31, the multiple movable contacts 31 are arranged side by side along the third direction D3, and each movable contact 31 has two ends along the first direction D1 for contacting or separating with a pair of stationary contacts 22, respectively.

[0076] The multiple moving contacts 31, at their ends along the first direction D1, contact a pair of stationary contacts 22, forming a reliable parallel circuit. The number of contact points formed by the multiple moving contacts 31 and a single stationary contact 22 is greater than or equal to two, achieving a current splitting effect. Furthermore, based on the principle that the magnitude of the electrodynamic repulsive force is proportional to the square of the current, the magnitude of the electrodynamic repulsive force at each contact point is significantly reduced, which helps improve the short-circuit resistance and enhances the reliability of the relay.

[0077] The push rod member 33 is movably provided in 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 static contact 22, and part of the push rod member 33 extends out of the side surface of the yoke plate 25 facing away from the static contact 22.

[0078] The movable contact 31 is movably mounted on a portion of a push rod member 33 that extends from the side surface of the yoke plate 25 toward the stationary contact 22. A first elastic member 32 is connected to the push rod member 33 and the movable contact 31 and is used to apply an elastic force to the movable contact 31 toward the stationary contact 22 to provide contact pressure.

[0079] As an example, the first elastic member 32 is a spring, but is not limited thereto.

[0080] A metal cover 27 is further provided on the side of the yoke plate 25 facing away from the static contact 22. The metal cover 27 covers the first through-hole 251 of the yoke plate 25. The portion of the push rod member 33 extending from the side of the yoke plate 25 facing away from the static contact 22 is inserted into the metal cover 27.

[0081] Please continue reading Figure 2The magnetic circuit portion 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 hollow and cylindrical and 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 circumference of the metal cover 27. The coil 44 is wound around the outer circumference of the coil frame 43.

[0082] The static iron core 42 is fixedly disposed in the metal cover 27, and a portion of the static iron core 42 is inserted into the first through-hole 251. The static iron core 42 has a second through-hole 421, and the second through-hole 421 corresponds to the position of the first through-hole 251, so that the push rod member 33 can be movably penetrated in the first through-hole 251 and the second through-hole 421. The moving iron core 41 is movably disposed in the metal cover 27 and is arranged relative to the static iron core 42 in the second direction D2. The moving iron core 41 is connected to the push rod member 33 and is used to be attracted by the static 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.

[0083] like Figure 2 As shown, the magnetic circuit portion 40 further includes a second elastic member 46 , which is located in the metal cover 27 and disposed between the static iron core 42 and the movable iron core 41 , and is used to reset the movable iron core 41 when the coil 44 is de-energized.

[0084] In one embodiment, the second elastic member 46 is a spring and is sleeved on the outer circumference of the push rod member 33 .

[0085] It should be noted that when the coil 44 is energized, the stationary iron core 42 attracts the movable iron core 41 to move upward, and the movable iron core 41 can drive the push rod member 33 to move upward. When the movable contact 31 contacts the stationary contact 22, the movable contact 31 is stopped by the stationary contact 22, while the push rod member 33 continues to move upward until the overtravel is completed.

[0086] During the overtravel process, the first elastic member 32 is squeezed by the push rod member 33 and can provide elastic force to the moving contact 31 to provide contact pressure.

[0087] like Figure 2As shown, the magnetic circuit portion 40 also includes a U-shaped yoke 47 and a magnetic tube 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 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 static contact 22. The two side yoke plates 472 are respectively connected to the two ends of the yoke plate 25 along the first direction D1 at their ends away from the bottom yoke plate 471. The coil 44, coil frame 43, metal cover 27, and movable iron core 41 are accommodated in the space enclosed by the yoke plate 25 and the bottom yoke plate 471 and the two side yoke plates 472 of the U-shaped yoke 47. The magnetic tube 45 is sleeved on the outer periphery of the metal cover 27 and is located between the metal cover 27 and the coil frame 43.

[0088] Continue reading Figure 2 The base 12 is bonded to the side surface of the bottom yoke plate 471 facing away from the yoke iron plate 25. The bottom yoke plate 471 has a glue hole 4711. The base 12 has a protrusion 121 protruding from the side surface facing the bottom yoke plate 471. The protrusion 121 is inserted into the glue hole 4711, and a glue layer is filled between the protrusion 121 and the wall surface of the glue hole 4711.

[0089] In the embodiment of the present application, the base 12 is bonded to the side of the bottom yoke plate 471 facing away from the yoke plate 25 through a glue dispensing process, thereby improving the connection reliability between the base 12 and the U-shaped yoke 47. Furthermore, the bottom yoke plate 471 has a glue-receiving hole 4711, and the base 12 has a protrusion 121 that is inserted into the glue-receiving hole 4711. Glue can penetrate between the protrusion 121 and the wall surface of the glue-receiving hole 4711 to form a glue layer, increasing the adhesive bonding area of ​​the glue, thereby further improving the connection strength between the base 12 and the U-shaped yoke 47.

[0090] like Figure 2 As shown, the arc extinguishing portion 26 includes a permanent magnet 262, which is disposed on the outer side of the insulating cover 21. By disposing the permanent magnet 262 on the outer periphery of the insulating cover 21, a magnetic field is generated around the static contact 22 and the movable contact 31. Therefore, due to the effect of the magnetic field, the arc generated between the static contact 22 and the movable contact 31 is stretched in a direction away from each other, thereby extinguishing the arc.

[0091] In the embodiment of the present application, the number of the permanent magnets 262 is two, and the two permanent magnets 262 are respectively located on two outer side surfaces of the insulating cover 21 along the first direction D1.

[0092] The arc extinguishing portion 26 further includes a yoke clamp 261, and a permanent magnet 262 is disposed between a 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 outward and affecting the arc extinguishing effect.

[0093] 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 alloys thereof.

[0094] 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 an annular structure that surrounds the outer circumference 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.

[0095] like Figure 3 As shown, the relay of the embodiment of the present application further includes a circuit board 50 , which is directly mechanically connected to the coil frame 43 , and the coil 44 is electrically connected to the circuit board 50 .

[0096] In the relay of the present embodiment, the circuit board 50 is directly mechanically connected to the coil frame 43, and the coil 44 is electrically connected to the circuit board 50. This allows the coil frame 43 to mechanically connect to the circuit board 50, improving the firmness of the connection to the circuit board 50 and thereby ensuring the reliability of the electrical connection between the coil 44 and the circuit board 50, significantly improving the reliability of the relay. Furthermore, when the relay is exposed to high vibration, the stable connection between the circuit board 50 and the coil frame 43 prevents vibration forces from being transmitted to the circuit board 50, which could cause a poor electrical connection between the coil 44 and the circuit board 50, such as solder joint failure or lead pin deformation.

[0097] It is understood that, in one embodiment, the coil 44 can be connected to the lead pin 48 ( Figure 12 ) is electrically connected to the circuit board 50 by welding, such as soldering, but not limited thereto. Specifically, lead pins 48 are connected to the coil bobbin 43, with portions of lead pins 48 extending beyond the coil bobbin 43. The ends of the coils 44 are wound around the portions of lead pins 48 extending beyond the coil bobbin 43. The lead pins 48 are then inserted into holes in the circuit board 50 and soldered.

[0098] Please continue reading Figure 3 The coil bobbin 43 includes a bobbin 431, a first flange 432, and a second flange 433. The first flange 432 is located at one axial end of the bobbin 431, and the second flange 433 is located at the other axial end of the bobbin 431. The coil 44 is wound around the outer circumference of the bobbin 431 and is located 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 bobbin 431 is the same as the axial direction of the bobbin 431.

[0099] The winding drum 431 is a hollow structure, and the metal cover 27 and the magnetic tube 45 are disposed in 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.

[0100] like Figures 4 to 7 As shown, at least one insert block 435 is protruding from the outer periphery of one of the first flange 432 and the second flange 433. The circuit board 50 is provided with at least one insertion hole 510, into which the at least one insert block 435 is inserted. The at least one insert block 435 includes at least one first stopper 4351. The first stopper 4351 is retained within the insertion hole 510 in the axial direction of the winding drum 431 (i.e., the second direction D2) and in a direction perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50 (i.e., the third direction D3). For ease of description, the insertion hole 510 into which the first stopper 4351 is inserted is referred to as the first insertion hole 510a.

[0101] In the embodiment of the present application, in the axial direction of the winding drum 431 (i.e., the second direction D2) and in the direction perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50 (i.e., the third direction D3), the first limit block 4351 is limited in the first socket 510a, so that the coil frame 43 is limitedly connected to the circuit board 50, ensuring the reliability of the connection of the circuit board 50.

[0102] It is understandable that the insert block 435 can be protruded from the outer periphery of the first flange 432, or the insert block 435 can be protruded from the outer periphery of the second flange 433. The following description will take the insert block 435 protruding from the outer periphery of the first flange 432 as an example, but the present invention is not limited thereto.

[0103] It should be noted that the number of jacks 510 provided on the circuit board 50 is at least one, i.e., the number of jacks 510 can be one, two, three, or another number. Similarly, the number of plug blocks 435 protruding from the outer periphery of the first flange 432 is at least one, i.e., the number of plug blocks 435 can be one, two, three, or another number. The number of jacks 510 and plug blocks 435 corresponds to each other.

[0104] When there is one inserting block 435 , the inserting block 435 is the first limiting block 4351 . When there are two or more inserting blocks 435 , the first limiting blocks 4351 may be one, two, or all of the inserting blocks 435 are first limiting blocks 4351 .

[0105] In the embodiment of the present application, the number of the inserting blocks 435 and the number of the inserting holes 510 are both two, and one of the inserting blocks 435 is the first limiting block 4351 .

[0106] like Figure 5 and Figure 6As shown, the hole wall surface of the first insertion hole 510a inserted into the first limit block 4351 is also protruded with multiple first limit sub-protrusions 511, and the multiple first limit sub-protrusions 511 are arranged along the circumference of the first insertion hole 510a, and the multiple first limit sub-protrusions 511 abut against the outer peripheral surface of the first limit block 4351.

[0107] In the embodiment of the present application, the first limiting block 4351 contacts the plurality of first limiting sub-protrusions 511 instead of directly contacting the wall surface of the first insertion hole 510a, thereby reducing the degree of wear between the first limiting block 4351 and the first insertion hole 510a.

[0108] The number of the first position-limiting sub-protrusions 511 can be two, three, four or other numbers. The plurality of first position-limiting sub-protrusions 511 are evenly or unevenly arranged along the circumference of the first insertion hole 510a.

[0109] In one embodiment, the first limiting block 4351 is interference fit with the plurality of first limiting sub-protrusions 511 .

[0110] Of course, in other embodiments, the first limiting sub-protrusion 511 may not be provided in the first socket 510a for inserting the first limiting block 4351. Instead, the first limiting block 4351 is inserted into the first socket 510a, and the first limiting block 4351 is directly interference fit or clearance fit with the first socket 510a.

[0111] Please continue reading Figure 5 and Figure 6 At least one insert block 435 includes at least one second stopper 4352. The second stopper 4352 is positioned within the insertion hole 510 in the axial direction of the bobbin 431 or in a direction perpendicular to the axial direction of the bobbin 431 and parallel to the circuit board 50 (i.e., the third direction D3). For ease of description, the insertion hole 510 into which the second stopper 4352 is inserted is referred to as the second insertion hole 510b.

[0112] In the embodiment of the present application, the first stopper 4351 is positioned within the first insertion hole 510a in the axial direction of the winding drum 431 (i.e., the second direction D2) and in a direction perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50 (i.e., the third direction D3). The second stopper 4352 is positioned within the second insertion hole 510b in the axial direction of the winding drum 431 (i.e., the second direction D2) and in a direction perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50 (i.e., the third direction D3). In other words, the first stopper 4351 and the circuit board 50 are positioned in two directions, providing precise positioning, while the second stopper 4352 and the circuit board 50 are positioned in only one direction, leaving the other direction free to prevent excessive positioning. Such an arrangement can prevent the problem that the coil frame 43 and the circuit board 50 cannot be assembled in a limited position due to low processing precision of the coil frame 43 and / or the circuit board 50.

[0113] It should be noted that when there are two or more insert blocks 435, some of the insert blocks 435 serve as the first limit block 4351, while others serve as the second limit block 4352. In the embodiment of the present application, there are two insert blocks 435, one of which serves as the first limit block 4351, and the other serves as the second limit block 4352.

[0114] Furthermore, when the number of the inserting blocks 435 is more than two, all the inserting blocks 435 may be the first limiting blocks 4351 , but not all the second limiting blocks 4352 .

[0115] like Figure 5 and Figure 6 As shown, the wall surface of 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 drum 431 ( Figure 6 ) or a direction perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50 ( Figure 6 (left and right directions in the ) relative settings.

[0116] In the embodiment of the present application, the second limiting block 4352 contacts the plurality of second limiting protrusions 512 instead of directly contacting the wall surface of the second insertion hole 510 b , thereby reducing the degree of wear between the second limiting block 4352 and the second insertion hole 510 b .

[0117] The number of the second limiting protrusions 512 can be two, three, four or other numbers. In the embodiment of the present application, the number of the 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 the present invention is not limited thereto.

[0118] In one embodiment, the second limiting block 4352 is interference fit with the plurality of second limiting sub-protrusions 512 .

[0119] It is understandable that the first limiting protrusion 511 may not be protruded from the wall surface of the first insertion hole 510 a , but may be provided on the outer peripheral surface of the first limiting block 4351 .

[0120] For example, Figure 8 As shown, the outer circumferential surface of the first limit block 4351 is further provided with a plurality of first limit sub-protrusions 511, which are arranged along the circumference of the first limit block 4351 and abut against the inner wall surface of the first insertion hole 510a.

[0121] In one embodiment, the plurality of first limiting protrusions 511 are interference fit with the first insertion holes 510 a.

[0122] For example, Figure 9 As shown, the outer circumference of the first limit block 4351 is also provided with a plurality of first limit protrusions 511, which abut against the inner wall surface of the first insertion hole 510a, and part of the outer circumference of the first limit block 4351 also abuts against the inner wall surface of the first insertion hole 510a.

[0123] It should be noted that, in one embodiment, the arrangement of the multiple first limiting sub-protrusions 511 between the corresponding first limiting block 4351 and the first socket 510a can also be: some of the first limiting sub-protrusions 511 are protruded from the outer peripheral surface of the first limiting block 4351, and the remaining first limiting sub-protrusions 511 are protruded from the hole wall surface of the first socket 510a.

[0124] It is understandable that the second limiting protrusion 512 may not be protruded from the wall surface of the second insertion hole 510 b , but may be provided on the outer peripheral surface of the second limiting block 4352 .

[0125] For example, Figure 10 As shown, the outer circumference of the second stopper 4352 is further provided with a plurality of second stopper protrusions 512, which abut against the wall surface of the second insertion hole 510b. The plurality of second stopper protrusions 512 are divided into two parts, and the two parts of the second stopper protrusions 512 are respectively arranged on two opposing outer surfaces of the second stopper 4352. The two outer surfaces are arranged opposite each other along the axial direction of the winding bobbin 431 or perpendicular to the axial direction of the winding bobbin 431 and parallel to the circuit board 50.

[0126] In one embodiment, the plurality of second limiting protrusions 512 are interference-fitted with the second insertion holes 510 b.

[0127] In the embodiment of the present application, the number of the second limiting sub-protrusions 512 is two, and the two second limiting sub-protrusions 512 are disposed opposite to each other along the second direction D2, but the present invention is not limited thereto.

[0128] In addition, the design of the second limit block 4352 and the second socket 510b being limited in only one direction and free in the other direction can also be achieved by not setting the second limit protrusion 512 but by designing the shape of the second socket 510b to be waist-round.

[0129] For example, Figure 11 As shown, the second insertion hole 510b into which the second stopper 4352 is inserted has a rounded shape, and the cross-section of the second stopper 4352 is circular. The second stopper 4352 is positioned between the two straight sides of the rounded shape. The two straight sides of the rounded shape can be arranged opposite each other in the axial direction (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.

[0130] It should be noted that, in one embodiment, the arrangement of the multiple second limiting sub-protrusions 512 between the corresponding second limiting block 4352 and the second socket 510b can also be: some of the second limiting sub-protrusions 512 are protruded from the outer peripheral surface of the second limiting block 4352, and the remaining second limiting sub-protrusions 512 are protruded from the hole wall surface of the second socket 510b.

[0131] like Figure 6 、 Figure 7 and Figure 12 As shown, a limiting protrusion 436 is provided on the outer periphery of the other of the first flange 432 and the second flange 433; a notch 520 is also provided on the outer periphery of the circuit board 50, and the limiting protrusion 436 passes through the notch 520, and is used to limit the circuit board 50 in the thickness direction of the circuit board 50 and in the axial direction perpendicular to the winding drum 431 and parallel to the circuit board 50 (the third direction D3).

[0132] It should be noted that the limiting protrusion 436 can be provided on the outer periphery of the first flange 432 or the outer periphery of the second flange 433. In other words, the insert 435 and the limiting protrusion 436 are provided on the outer periphery of the first flange 432 and the outer periphery of the second flange 433, respectively. The following description uses the example of the limiting protrusion 436 being provided on the second flange 433, but this is not intended to be limiting.

[0133] It can be understood that since the outer periphery of the circuit board 50 is provided with a notch 520, 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, but only limits the circuit board 50 in the thickness direction of the circuit board 50 and in the axial direction perpendicular to the winding drum 431 and parallel to the circuit board 50, thereby facilitating the disassembly and assembly of the circuit board 50.

[0134] Therefore, when assembling the circuit board 50 and the coil frame 43 of the relay in the embodiment of the present application, 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 with the position where the circuit board 50 contacts the limiting protrusion 436 as the axis so that the insert 435 is inserted into the socket 510. At this point, the circuit board 50 and the coil frame 43 have completed the limiting assembly.

[0135] In one embodiment, the position of the limiting protrusion 436 corresponds to the position of at least one plug block 435 in the axial direction (second direction D2) of the winding drum 431, so that the position of at least one socket 510 and notch 520 of the circuit board 50 corresponds to the axial direction (second direction D2) of the winding drum 431.

[0136] Please continue reading Figure 6 、 Figure 7 and Figure 12 The limiting protrusion 436 includes a through portion 4361 and a contact portion 4362. The through portion 4361 is protruded from the outer periphery of the first flange 432 and the other of the second flanges 433 and passes through the notch 520. The contact 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.

[0137] In the embodiment of the present application, the through portion 4361 is protruded from the outer periphery of the second flange 433 , and the abutting portion 4362 is connected to an end of the through portion 4361 away from the second flange 433 .

[0138] The abutment portion 4362 includes two barbs 4363 protruding from the outer circumference of the through portion 4361. The two barbs 4363 are arranged opposite each other in a direction perpendicular to the axis of the winding drum 431 and parallel to the circuit board 50, and respectively abut against the side of the circuit board 50 facing away from the coil 44. The two barbs 4363 can be used to limit the position of the circuit board 50.

[0139] It can be seen that the limiting protrusion 436 provided on the coil frame 43 of the embodiment of the present application not only facilitates the installation of the circuit board 50, but also can limit the position of the circuit board 50.

[0140] In one embodiment, the orthographic projection of the contact portion 4362 onto the plane where the surface of the first flange 432 facing the second flange 433 is located is a dovetail shape. Of course, the shape of the contact portion 4362 is not limited to the dovetail shape.

[0141] like Figure 7 As shown, the insert block 435 has an inclined surface 4353 on a side facing away from the limiting protrusion 436 . The inclined surface 4353 is inclined relative to the thickness direction of the circuit board 50 to guide the insert block 435 to be inserted into the insertion hole 510 .

[0142] In the embodiment of the present application, when the limiting protrusion 436 passes through the notch 520 and the circuit board 50 is rotated with the position where the circuit board 50 contacts the limiting protrusion 436 as the axis, the inclined surface 4353 can be guided into contact with the wall surface of the hole 510 to guide the plug 435 to be accurately inserted into the hole 510.

[0143] It is worth mentioning that in the embodiment of the present application, the limiting structure between the circuit board 50 and the first flange 432 is achieved through the insert block 435 and the insertion hole 510. Since the first limiting block 4351 and the circuit board 50 limit the position in two directions, it provides a precise limiting function, and the second limiting block 4352 and the circuit board 50 limit the position in only one direction, while leaving the other direction empty, it prevents excessive limiting. This prevents the problem of the coil bobbin 43 and the circuit board 50 being unable to be fixed and assembled due to low machining precision.

[0144] The circuit board 50 and the second flange 433 are retained by the retaining protrusion 436 and the notch 520. Since the notch 520 is semi-open, the retaining protrusion 436 does not retain the circuit board 50 in the direction of its opening. Instead, it retains the circuit board 50 only in the thickness direction of the circuit board 50 and in a direction perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50, facilitating assembly and disassembly of the circuit board 50.

[0145] Therefore, when assembling the circuit board 50 and the coil bobbin 43 of the relay of the present application, 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 with the contact position between the circuit board 50 and the limiting protrusion 436 as the axis, so that the insert block 435 is inserted into the insertion hole 510, and the circuit board 50 and the coil bobbin 43 are assembled and limited. Thus, the combined action of the insert block 435 and the insertion hole 510, and the limiting protrusion 436 and the notch 520, provides space for the circuit board 50 and the coil bobbin 43 to move in the second direction D2 when the circuit board 50 and the coil bobbin 43 are assembled and disassembled. This facilitates assembly and disassembly of the two and prevents deformation of the coil bobbin 43 from affecting the proper assembly of the circuit board 50 and the coil bobbin 43.

[0146] like Figure 7 and Figure 13 As shown, the yoke plate 25 includes a plate body 252 and a positioning protrusion 253. The positioning protrusion 253 is provided on one side surface of the plate body 252 in the thickness direction (second direction D2). The coil bobbin 43 abuts against the side surface of the plate body 252 where the positioning protrusion 253 is provided. The coil bobbin 43 has a positioning hole 434, and the positioning protrusion 253 is retained in the positioning hole 434.

[0147] It will be appreciated that in the relay of the embodiment of the present application, 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, because the positioning protrusion 253 is provided on the yoke plate 25, the positioning protrusion 253 is stronger. When the relay is exposed to strong vibration, the positioning protrusion 253 is less likely to break. In conjunction with the positioning hole 434, the positioning protrusion 253 can still maintain a reliable positioning effect, ensuring the assembly accuracy of the yoke plate 25 and the coil frame 43, thereby improving the operating reliability of the entire relay product.

[0148] In one embodiment, the yoke plate 25 is made of metal material, and the coil frame 43 is made of insulating material. Furthermore, the insulating material can be plastic, but is not limited thereto.

[0149] It should be noted that the yoke plate 25 may include one or more positioning protrusions 253 , and the coil frame 43 may include one or more positioning holes 434 . The number of positioning protrusions 253 corresponds to the number of positioning holes 434 .

[0150] Among them, when the number of the positioning protrusion 253 and the number of the positioning hole 434 are both one, the cross-sectional shape of the positioning protrusion 253 is non-circular, such as rectangular, elliptical, triangular, etc., and the shape of the positioning hole 434 is adapted to the cross-sectional shape of the positioning protrusion 253.

[0151] 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. The multiple positioning holes 434 can limit the relative rotation between the yoke plate 25 and the coil frame 43.

[0152] like Figure 13 As shown, in the embodiment of the present application, the yoke plate 25 includes two positioning protrusions 253 , and the two positioning protrusions 253 are spaced apart along the first direction D1 . Each positioning protrusion 253 is cylindrical, but not limited thereto.

[0153] Please continue reading Figure 7 The first flange 432 is provided with two positioning holes 434. The two positioning holes 434 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 the embodiment of the present application, the positioning holes 434 are blind holes.

[0154] like Figure 14 As shown, the wall surface of the positioning hole 434 is further provided with a plurality of sub-protrusions 254, which are arranged along the circumference of the positioning hole 434 and abut against the outer circumferential surface of the positioning protrusion 253. It should be noted that the sub-protrusions 254 in the plurality of positioning holes 434 may all abut against the outer circumferential surface of the positioning protrusion 253, or the sub-protrusions 254 in some positioning holes 434 may abut against the outer circumferential surface of the positioning protrusion 253, while the sub-protrusions 254 in the remaining positioning holes 434 may or may not abut against the outer circumferential surface of the positioning protrusion 253.

[0155] 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 are protruded from the outer peripheral surface of the positioning protrusion 253, and the remaining sub-protrusions 254 are protruded from the hole wall surface of the positioning hole 434.

[0156] In the embodiment of the present application, the positioning protrusion 253 of the yoke iron plate 25 contacts multiple sub-protrusions 254 instead of directly contacting the wall surface of the positioning hole 434, thereby reducing the degree of wear between the positioning protrusion 253 and the positioning hole 434 and further improving the reliability of positioning.

[0157] The number of sub-protrusions 254 in one positioning hole 434 may be two, three, four, or other numbers. The sub-protrusions 254 may be arranged uniformly or non-uniformly along the circumference of the positioning hole 434 .

[0158] In one embodiment, the positioning protrusion 253 is interference-fitted with the plurality of sub-protrusions 254 .

[0159] Of course, in other embodiments, the sub-protrusion 254 may not be provided in the positioning hole 434 , but the positioning protrusion 253 is inserted into the positioning hole 434 , and the positioning protrusion 253 and the positioning hole 434 are interference fit or clearance fit.

[0160] Please continue reading Figure 14 As shown, a line segment AB is formed between the centers of the two positioning holes 434 , and the line segment AB has a perpendicular midline 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 midline L1 .

[0161] An example in which three sub-protrusions 254 are provided in one positioning hole 434 is used for description. Figure 7 The three sub-protrusions 254 in the left-center positioning hole 434 are located at the 10 o'clock, 2 o'clock, and 6 o'clock positions, respectively, while the three sub-protrusions 254 in the right-center positioning hole 434 are located at the 12 o'clock, 4 o'clock, and 8 o'clock positions, respectively. In other words, the three sub-protrusions 254 in the two positioning holes 434 are arranged in different directions. This arrangement effectively reduces the assembly precision requirements between the yoke plate 25 and the coil bobbin 43, and solves the problem of the yoke plate 25 and / or the coil bobbin 43 being unable to assemble due to manufacturing tolerances.

[0162] Please return to Figure 7 Each sub-protrusion 254 has a guide slope 2541. The guide slope 2541 forms an angle with the axis of the positioning hole 434. The guide slope 2541 is used to guide the positioning protrusion 253 into the positioning hole 434. By providing the guide slope 2541 on the sub-protrusion 254, when the yoke plate 25 is assembled with the coil bobbin 43, the guide slope 2541 can guide the positioning protrusion 253 to be accurately inserted into the positioning hole 434.

[0163] like Figure 15 As shown, it can be understood that in other embodiments, the sub-protrusion 254 may not be set in the positioning hole 434, but may be set on the positioning protrusion 253.

[0164] like Figure 15As shown, specifically, the outer circumferential surface of the positioning protrusion 253 is further provided with a plurality of sub-protrusions 254, which are arranged along the circumference of the positioning protrusion 253 and abut against the inner wall surface of the positioning hole 434. The sub-protrusions 254 of the plurality of positioning protrusions 253 may all abut against the inner wall surface of the positioning hole 434, or the sub-protrusions 254 of some positioning protrusions 253 may abut against the inner wall surface of the positioning hole 434, while the sub-protrusions 254 of the remaining positioning protrusions 253 may or may not abut against the inner wall surface of the positioning hole 434.

[0165] In one embodiment, the positioning holes 434 are interference-fitted with the plurality of sub-protrusions 254 .

[0166] Of course, in other embodiments, the sub-protrusion 254 may not be provided in the positioning hole 434 , but the positioning protrusion 253 is inserted into the positioning hole 434 , and the positioning protrusion 253 and the positioning hole 434 are interference fit or clearance fit.

[0167] 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 midline L2 parallel to the plate body 252; the arrangement direction of the multiple sub-protrusions 254 on the periphery of the two positioning protrusions 253 is not symmetrically arranged around the midline L2.

[0168] It can be understood that the arrangement directions of the three sub-protrusions 254 on the periphery of the two positioning protrusions 253 are staggered. Such an 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.

[0169] In summary, the relay of the embodiment of the present application has at least the following advantages and beneficial effects:

[0170] In the relay of the present embodiment, the circuit board 50 is directly mechanically connected to the coil frame 43, and the coil 44 is electrically connected to the circuit board 50. This allows the coil frame 43 to mechanically connect to the circuit board 50, improving the firmness of the connection to the circuit board 50 and thereby ensuring the reliability of the electrical connection between the coil 44 and the circuit board 50, significantly improving the reliability of the relay. Furthermore, when the relay is exposed to high vibration, the stable connection between the circuit board 50 and the coil frame 43 prevents vibration forces from being transmitted to the circuit board 50, which could cause a poor electrical connection between the coil 44 and the circuit board 50, such as solder joint failure or lead pin deformation.

[0171] Furthermore, the first stopper 4351 limits the position between the coil bobbin 43 and the circuit board 50 in two directions, providing precise positioning. The second stopper 4352 limits the position between the coil bobbin 43 and the circuit board 50 in only one direction, leaving the other direction free to prevent excessive positioning. This arrangement prevents problems such as the coil bobbin 43 and / or circuit board 50 being unable to be positioned properly due to inaccurate machining.

[0172] Furthermore, since the outer periphery of the circuit board 50 is provided with a notch 520, 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, but only limits the circuit board 50 in the thickness direction of the circuit board 50 and in the axial direction perpendicular to the winding drum 431 and parallel to the circuit board 50, thereby facilitating the disassembly and assembly of the circuit board 50.

[0173] Furthermore, under the joint action of the plug block 435 and the socket 510, as well as the limiting protrusion 436 and the notch 520, when the circuit board 50 and the coil frame 43 are disassembled and assembled, the circuit board 50 and the coil frame 43 have movable space in the second direction D2, which facilitates the disassembly and assembly of the two and avoids affecting the normal assembly of the circuit board 50 and the coil frame 43 due to deformation of the coil frame 43.

[0174] It is understandable that the various embodiments / implementations provided in this application can be combined with each other without causing any contradiction, and they will not be illustrated one by one here.

[0175] In the application examples, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. Terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the application examples can be understood according to the specific circumstances.

[0176] In the description of the application embodiments, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the application embodiments and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the application embodiments.

[0177] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the claimed invention. In this specification, schematic representations 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 any one or more embodiments or examples.

[0178] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A relay, characterized in that: include: Coil former; A coil, wound around the outer circumference of the coil frame; as well as The circuit board is directly mechanically connected to the coil frame, and the coil is electrically connected to the circuit board.

2. The relay according to claim 1, wherein: The coil frame includes a bobbin, a first flange, and a second flange, wherein the first flange is provided at one axial end of the bobbin, and the second flange is provided at the other axial end of the bobbin, and the coil is wound around the outer circumference of the bobbin and provided between the first flange and the second flange; The first flange and the second flange are respectively directly mechanically connected to the circuit board.

3. The relay according to claim 2, characterized in that At least one plug block is protruded from the outer periphery of one of the first flange and the second flange; The circuit board is provided with at least one plug hole, and the at least one plug block is inserted into the at least one plug hole in a one-to-one correspondence; The at least one insert block includes at least one first limiting block; The first limiting block is limited in the insertion hole in the axial direction of the winding drum and in a direction perpendicular to the axial direction of the winding drum and parallel to the circuit board.

4. The relay according to claim 3, characterized in that A plurality of first limiting sub-protrusions are further provided between the outer circumferential surface of the first limiting block and the hole wall surface of the insertion hole, and the plurality of first limiting sub-protrusions are arranged along the circumference of the insertion hole.

5. The relay according to claim 4, characterized in that A plurality of first limiting sub-protrusions are convexly provided on the wall surface of the hole into which the first limiting block is inserted, and the plurality of first limiting sub-protrusions abut against the outer peripheral surface of the first limiting block.

6. The relay according to claim 5, characterized in that The first limiting block is interference-fitted with the plurality of first limiting sub-protrusions.

7. The relay according to claim 4, characterized in that A plurality of first limiting sub-protrusions are convexly provided on the outer peripheral surface of the first limiting block, and the plurality of first limiting sub-protrusions abut against the inner wall surface of the insertion hole.

8. The relay according to claim 7, characterized in that The plurality of first limiting protrusions are interference fit with the insertion hole.

9. The relay according to claim 3, characterized in that The at least one insert block includes at least one second limiting block; The second limiting block is limited in the insertion hole in the axial direction of the winding drum or in a direction perpendicular to the axial direction of the winding drum and parallel to the circuit board.

10. The relay according to claim 9, characterized in that A plurality of second limiting protrusions are further provided between the outer peripheral surface of the second limiting block and the hole wall surface of the insertion hole.

11. The relay according to claim 10, characterized in that A plurality of second limiting protrusions are convexly provided on the wall surface of the insertion hole into which the second limiting block is inserted; the plurality of second limiting protrusions abut against the outer peripheral surface of the second limiting block; The plurality of second limiting sub-protrusions are divided into two parts, and the two parts of the second limiting sub-protrusions are respectively arranged on two oppositely disposed hole walls in the socket; wherein the two hole walls are oppositely disposed along the axial direction of the winding drum or perpendicular to the axial direction of the winding drum and parallel to the direction of the circuit board.

12. The relay according to claim 11, wherein: The second limiting block is interference-fitted with the plurality of second limiting protrusions.

13. The relay according to claim 10, characterized in that The outer peripheral surface of the second limiting block is provided with a plurality of second limiting protrusions; the plurality of second limiting protrusions abut against the wall surface of the insertion hole; The multiple second limiting sub-protrusions are divided into two parts, and the two parts of the second limiting sub-protrusions are respectively arranged on two oppositely set outer surfaces of the second limiting block; wherein, the two outer surfaces are relatively arranged along the axial direction of the winding drum or perpendicular to the axial direction of the winding drum and parallel to the direction of the circuit board.

14. The relay according to claim 13, characterized in that The plurality of second limiting protrusions are interference fit with the insertion hole.

15. The relay according to claim 9, characterized in that The shape of the insertion hole inserted into the second limiting block is waist-round, and the cross-sectional shape of the second limiting block is circular; The second limiting block is limited between the two straight sides of the waist-shaped body.

16. The relay according to claim 3, characterized in that A limiting protrusion is provided on the outer periphery of the other of the first flange and the second flange; The outer periphery of the circuit board is further provided with a notch, and the limiting protrusion passes through the notch and is used to limit the circuit board in the thickness direction of the circuit board and in a direction perpendicular to the axial direction of the winding drum and parallel to the circuit board.

17. The relay according to claim 16, characterized in that The limiting protrusion includes a through portion and an abutment portion. The through portion is protruded from the outer peripheral edge of the other of the first flange and the second flange and passes through the notch. The abutment 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.

18. The relay according to claim 17, wherein: The abutment portion includes two barbs protruding from the outer peripheral surface of the through portion. The two barbs are arranged opposite to each other in a direction perpendicular to the axial direction of the winding drum and parallel to the circuit board, and respectively abut against a side surface of the circuit board facing away from the coil.

19. The relay according to claim 16, wherein: The inserting block has an inclined surface on a side facing away from the limiting protrusion. The inclined surface is arranged to be inclined relative to the thickness direction of the circuit board and is used to guide the inserting block to be inserted into the insertion hole.

20. The relay according to any one of claims 1 to 19, characterized in that: The coil is electrically connected to the circuit board via lead pins.

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