Relay

Abstract

The present disclosure provides a relay, comprising a coil frame, a coil, and a circuit board. The coil is wound on the periphery of the coil frame; the circuit board is directly mechanically connected to the coil frame, and the coil is electrically connected to the circuit board. The coil frame functions to mechanically connect the circuit board, and the coil is only adapted to be electrically connected to the circuit board and does not function to mechanically connect the circuit board. In this way, unreliable connection of the circuit board 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

Relay

[0001] The present disclosure claims priority to Chinese Patent Application No. 202410445793.1, filed on April 12, 2024, the entire contents of which are incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of electric control devices, in particular to a relay. BACKGROUND

[0003] A relay is an electronic control device, which has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is usually applied in an automatic control circuit. The relay is actually a kind of "automatic switch" that uses a small current to control a large current. Therefore, it plays a role in automatic regulation, safety protection, and conversion of circuits.

[0004] A high-voltage direct-current relay is a kind of relay. The high-voltage direct-current relay in the prior art includes a coil and a circuit board, the coil is electrically connected with the circuit board, and the circuit board is used to control the power-on or power-off of the coil.

[0005] In the prior art, the coil is connected with the circuit board by soldering. The soldering connection not only plays a role in electrically connecting the coil and the circuit board, but also plays a role in mechanically connecting the circuit board. However, when the soldering is poor, the circuit board will have a problem of unreliable connection, which affects the working reliability of the product. In addition, due to the influence of vibration impact, the solder joint may be loose or not conductive, which leads to failure of the relay. SUMMARY

[0006] The present disclosure provides a relay, which mechanically connects a coil holder with a circuit board and electrically connects a coil with the circuit board, thereby improving the problem of unreliable connection of the circuit board in the prior art.

[0007] The relay of the present disclosure includes:

[0008] a coil holder;

[0009] a coil wound around an outer periphery of the coil holder; and

[0010] a circuit board directly mechanically connected with the coil holder, the coil being electrically connected with the circuit board.

[0011] According to some embodiments of the present disclosure, the coil holder includes a bobbin, a first flange, and a second flange, the first flange is arranged at one axial end of the bobbin, the second flange is arranged at the other axial end of the bobbin, the coil is wound around an outer periphery of the bobbin and arranged between the first flange and the second flange.

[0012] The first flange and the second flange are directly mechanically connected with the circuit board respectively.

[0013] According to some embodiments of the present disclosure, an outer periphery of one of the first flange and the second flange is provided with at least one plug-in part;

[0014] The circuit board is provided with at least one insertion hole, and the at least one plug-in part is inserted into the at least one insertion hole one by one.

[0015] The at least one plug-in part comprises at least one first limiting part.

[0016] The first limiting part is limited in the insertion hole in the axial direction of the winding drum, and the first limiting part is limited in the insertion hole in the direction perpendicular to the axial direction of the winding drum and parallel to the circuit board.

[0017] According to some embodiments of the present disclosure, a plurality of first limiting protrusions are further arranged between the outer peripheral surface of the first limiting part and the hole wall surface of the insertion hole.

[0018] According to some embodiments of the present disclosure, the hole wall surface of the insertion hole into which the first limiting part is inserted is provided with a plurality of first limiting protrusions, and the plurality of first limiting protrusions abut against the outer peripheral surface of the first limiting part.

[0019] According to some embodiments of the present disclosure, the first limiting part is interference-fitted with the plurality of first limiting protrusions.

[0020] According to some embodiments of the present disclosure, the outer peripheral surface of the first limiting part is provided with a plurality of first limiting protrusions, and the plurality of first limiting protrusions abut against the inner wall surface of the insertion hole.

[0021] According to some embodiments of the present disclosure, the plurality of first limiting protrusions are interference-fitted with the insertion hole.

[0022] According to some embodiments of the present disclosure, the at least one plug-in part comprises at least one second limiting part.

[0023] The second limiting part is limited in the insertion hole in the axial direction of the winding drum, or the second limiting part is limited in the insertion hole in the direction perpendicular to the axial direction of the winding drum and parallel to the circuit board.

[0024] According to some embodiments of the present disclosure, a plurality of second limiting protrusions are further arranged between the outer peripheral surface of the second limiting part and the hole wall surface of the insertion hole.

[0025] According to some embodiments of the present disclosure, the hole wall surface of the insertion hole of the second limiting member is provided with a plurality of second limiting protrusions; the plurality of second limiting protrusions abut against the outer peripheral surface of the second limiting member;

[0026] The plurality of second limiting protrusions are divided into two parts, and the two parts of the second limiting protrusions are arranged on two oppositely arranged hole walls in the insertion hole; wherein the two hole walls are oppositely 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.

[0027] According to some embodiments of the present disclosure, the second limiting member is in interference fit with the plurality of second limiting protrusions.

[0028] According to some embodiments of the present disclosure, the outer peripheral surface of the second limiting member is provided with a plurality of second limiting protrusions; the plurality of second limiting protrusions abut against the hole wall surface of the insertion hole;

[0029] The plurality of second limiting protrusions are divided into two parts, and the two parts of the second limiting protrusions are arranged on two oppositely arranged outer surfaces of the second limiting member; wherein the two outer surfaces are oppositely 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.

[0030] According to some embodiments of the present disclosure, the plurality of second limiting protrusions are in interference fit with the insertion hole.

[0031] According to some embodiments of the present disclosure, the shape of the insertion hole of the second limiting member inserted into the insertion hole is a racetrack shape, and the cross-sectional shape of the second limiting member is a circular shape;

[0032] The second limiting member is limited between the two straight hole walls of the racetrack-shaped insertion hole.

[0033] According to some embodiments of the present disclosure, the outer peripheral edge of the first flange and the second flange not inserted into the insertion member is provided with a limiting protrusion;

[0034] The outer peripheral edge of the circuit board is further provided with a notch, and the limiting protrusion passes through the notch, so as to limit the circuit board in the thickness direction of the circuit board and in the direction perpendicular to the axial direction of the winding drum and parallel to the circuit board.

[0035] According to some embodiments of the present disclosure, the limiting protrusion comprises a connecting portion and an abutting portion, the connecting portion is provided on the outer peripheral edge of the first flange and the second flange not inserted into the insertion member, and passes through the notch, the abutting portion is connected to the end of the connecting portion, and abuts against the side surface of the circuit board away from the coil.

[0036] According to some embodiments of the present disclosure, the abutting portion comprises two barbs protruding from the outer circumferential surface of the connecting portion, the two barbs are oppositely arranged in a direction perpendicular to the axial direction of the bobbin and parallel to the circuit board, and abut against the side surface of the circuit board away from the coil.

[0037] According to some embodiments of the present disclosure, the side of the insert away from the limiting protrusion has an inclined surface, which is arranged obliquely relative to the thickness direction of the circuit board, for guiding the insertion of the insert into the insertion hole.

[0038] According to some embodiments of the present disclosure, the coil is electrically connected to the circuit board through the lead-out pin.

[0039] The above-mentioned one embodiment of the application has at least the following advantages or beneficial effects:

[0040] The relay of the embodiments of the present disclosure has the circuit board directly mechanically connected to the coil holder and the coil electrically connected to the circuit board, so that the coil holder plays a role of mechanically connecting the circuit board, improves the firmness of the circuit board connection, and further ensures the reliability of the electrical connection between the coil and the circuit board, thereby significantly improving the reliability of the relay operation.

[0041] Meanwhile, when the relay is in a large vibration environment, the stable connection between the circuit board and the coil holder can avoid the transmission of vibration force to the circuit board, thereby causing poor electrical connection between the coil and the circuit board, such as welding point failure or lead-out pin deformation.

[0042] Further, the first limiting member and the circuit board are limited in two directions, which plays a role of precise limiting, and the second limiting member and the circuit board are limited in only one direction, which plays a role of avoiding excessive limiting. In this way, the problem that the coil holder and the circuit board cannot be assembled due to low processing precision of the coil holder and / or the circuit board can be prevented.

[0043] Further, since the outer periphery of the circuit board is provided with a notch, the notch is a semi-open structure, so in the opening direction of the notch, the limiting protrusion does not limit the circuit board, but only limits the circuit board in the thickness direction of the circuit board and in the direction perpendicular to the axial direction of the bobbin and parallel to the circuit board, facilitating the disassembly of the circuit board.

[0044] Further, under the joint action of the insert and the insertion hole, and the limiting protrusion and the notch, the circuit board and the coil holder have a movable space in the second direction when disassembling the circuit board and the coil holder, which facilitates the disassembly of the two, and avoids the influence of the deformation of the coil holder on the normal assembly of the circuit board and the coil holder. BRIEF DESCRIPTION OF DRAWINGS

[0045] FIG. 1 is a top view of a schematic diagram of a relay according to an exemplary embodiment.

[0046] FIG. 2 is a sectional view along the A-A section line of FIG. 1.

[0047] FIG. 3 is a perspective view of a schematic diagram of a coil holder and a circuit board assembled according to an exemplary embodiment of the present disclosure.

[0048] FIG. 4 is a side view of a schematic diagram of a coil holder and a circuit board assembled according to an exemplary embodiment of the present disclosure.

[0049] FIG. 5 is a partial enlarged view of X1 of FIG. 4.

[0050] FIG. 6 is a schematic diagram of a circuit board according to an exemplary embodiment of the present disclosure.

[0051] FIG. 7 is a schematic diagram of a coil holder according to an exemplary embodiment of the present disclosure.

[0052] FIG. 8 is a schematic diagram of a first limiting member being limited in a first insertion hole according to another exemplary embodiment of the present disclosure.

[0053] FIG. 9 is a schematic diagram of a first limiting member being limited in a first insertion hole according to still another exemplary embodiment of the present disclosure.

[0054] FIG. 10 is a schematic diagram of a second limiting member being limited in a second insertion hole according to another exemplary embodiment of the present disclosure.

[0055] FIG. 11 is a schematic diagram of a second limiting member being limited in a second insertion hole according to still another exemplary embodiment of the present disclosure.

[0056] FIG. 12 is another perspective view of a schematic diagram of a coil holder and a circuit board assembled according to an exemplary embodiment of the present disclosure.

[0057] FIG. 13 is a schematic diagram of a yoke plate according to an embodiment of the present disclosure.

[0058] FIG. 14 is a top view of a schematic diagram of a coil holder according to an embodiment of the present disclosure.

[0059] FIG. 15 is a schematic diagram of a yoke plate according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0060] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments, however, can be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and thus a detailed description of them will not be repeated.

[0061] It is to be understood that the terms "including", "comprising", "having" and variations thereof herein are intended to cover all possible combinations of the listed steps or elements. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not to be limited by the steps or elements that are listed, but can include additional steps or elements not expressly listed or inherent to such process, method, system, product, or apparatus.

[0062] As shown in FIG. 1 and FIG. 2, the relay according to embodiments of the present disclosure includes a housing 11, a base 12, an insulating cover 21, a yoke plate 25, a pair of static contacts 22, an arc extinguishing part 26, a moving assembly 30, and a magnetic circuit part 40.

[0063] The housing 11 and the base 12 are connected and form a cavity for accommodating the insulating cover 21, at least part of the static contacts 22, the arc extinguishing part 26, the moving assembly 30, and the magnetic circuit part 40. The shape formed after the housing 11 and the base 12 are connected can be a cuboid or a cylinder, which is not limited by the present disclosure.

[0064] As an example, the housing 11 is a cuboid with an opening, and the base 12 is a substantially plate structure. The base 12 is buckled on the opening of the housing 11 to form a cavity for accommodating the insulating cover 21, at least part of the static contacts 22, the arc extinguishing part 26, the moving assembly 30, and the magnetic circuit part 40.

[0065] Of course, in other embodiments, the housing 11 can be a plate structure, and the base 12 is a cuboid with an opening. Alternatively, the housing 11 and the base 12 are both cuboids and both have an opening on one face. The opening of the housing 11 is arranged opposite to the opening of the base 12, and the housing 11 and the base 12 are buckled to form a cavity for accommodating the insulating cover 21, at least part of the static contacts 22, the arc extinguishing part 26, the moving assembly 30, and the magnetic circuit part 40.

[0066] In an embodiment, the housing 11 and the base 12 are both made of insulating material, such as plastic, but are not limited thereto.

[0067] As shown in FIG. 2, the pair of static contacts 22 are installed on the top of the insulating cover 21. At least part of each static contact 22 is located in the insulating cover 21, and the bottom of each static contact 22 is further provided with a static contact point, which can be integrally or separately arranged on the bottom of the static contact 22. The housing 11 is provided with two openings 111 corresponding to the position of the top of the insulating cover 21, and the pair of static contacts 22 extend out of the outer surface of the housing 11 through the two openings 111. One static contact 22 serves as a terminal for current inflow, and the other static contact 22 serves as a terminal for current outflow.

[0068] In the embodiments of the present disclosure, the top of the insulating cover 21 is provided with two mounting holes 211, the positions of the two mounting holes 211 correspond to the positions of the two openings 111 respectively, and a pair of static contacts 22 are respectively arranged in the two mounting holes 211. In addition, each static contact 22 can be connected with the insulating cover 21 by welding, but is not limited thereto.

[0069] It can be understood that the insulating cover 21 can 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 can also be made of plastic material.

[0070] In the embodiments of the present disclosure, the insulating cover 21 is made of ceramic material, and the insulating cover 21 is connected with the yoke plate 25 through the frame piece 24. The frame piece 24 can be a metal ring structure, such as 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 and the like. The other end of the frame piece 24 is connected to the yoke plate 25, which can also be connected by laser welding, brazing, resistance welding, gluing and the like. The frame piece 24 is arranged between the insulating cover 21 and the yoke plate 25, which facilitates the connection of the insulating cover 21 and the yoke plate 25.

[0071] Please continue to refer to FIG. 2, the moving assembly 30 is movably arranged in the cavity formed by the shell 11 and the base 12. The moving assembly 30 includes a moving contact 31, a first elastic member 32 and a push rod member 33.

[0072] For the convenience of description, the arrangement direction of the pair of static contacts 22 is defined as a first direction D1, and the moving direction of the moving assembly 30 is defined as a second direction D2, wherein the first direction D1 is perpendicular to the second direction D2. A direction perpendicular to the first direction D1 and the second direction D2 is defined as a third direction D3.

[0073] The moving contact 31 is arranged in the insulating cover 21, and the two ends of the moving contact 31 along the first direction D1 are respectively used for contacting or separating from the bottom of the pair of static contacts 22.

[0074] The moving contact 31 can include a contact body and two moving contacts, the moving contacts can be separate parts, and the two moving contacts are connected to the two ends of the contact body along the first direction D1. Of course, in other embodiments, the two moving contacts can also be integrally formed at the two ends of the contact body along the first direction D1.

[0075] In addition, the moving contact can protrude from the side surface of the contact body facing the static contact 22, or can be flush with the side surface of the contact body facing the static contact 22.

[0076] It should be noted that the number of the movable contact 31 included in the moving assembly 30 can be one or more, wherein more than two is meant. When the number of the movable contact 31 is more than one, the plurality of 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 from a pair of stationary contacts 22, respectively.

[0077] The plurality of movable contacts 31 have two ends along the first direction D1 for contacting a pair of stationary contacts 22, respectively, to form a reliable parallel circuit. The number of contact points formed by the plurality of movable contacts 31 and one stationary contact 22 is greater than or equal to two, which realizes the effect of shunt. In addition, according to the principle that the size of the electric repulsive force is proportional to the square of the current, the size of the electric repulsive force of each contact point is significantly reduced, which is beneficial to the improvement of the short-circuit resistance and the reliability of the relay.

[0078] The push rod member 33 is movably arranged in the first through hole 251 of the yoke plate 25, and part of the push rod member 33 protrudes from the side surface of the yoke plate 25 facing the stationary contact 22, and part of the push rod member 33 protrudes from the side surface of the yoke plate 25 away from the stationary contact 22.

[0079] The movable contact 31 is movably mounted on the part of the push rod member 33 protruding from the side surface of the yoke plate 25 facing the stationary contact 22. The 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 in the direction of the stationary contact 22 to provide contact pressure.

[0080] As an example, the first elastic member 32 is a spring, but is not limited thereto.

[0081] The side surface of the yoke plate 25 away from the stationary contact 22 is also covered with a metal cover 27, and the metal cover 27 covers the first through hole 251 of the yoke plate 25. The part of the push rod member 33 protruding from the side surface of the yoke plate 25 away from the stationary contact 22 is inserted into the metal cover 27.

[0082] Please continue to refer to FIG. 2, the magnetic circuit part 40 includes a movable core 41, a stationary core 42, a coil holder 43 and a coil 44. The coil holder 43 is in a hollow cylindrical shape and is made of insulating material. The coil holder 43 is located on the side of the yoke plate 25 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 holder 43.

[0083] The static iron core 42 is fixedly arranged in the metal cover 27, and part 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 corresponding to the position of the first through hole 251, so that the push rod member 33 is movably arranged in the first through hole 251 and the second through hole 421. The dynamic iron core 41 is movably arranged in the metal cover 27 and oppositely arranged with the static iron core 42 in the second direction D2. The dynamic iron core 41 is connected with the push rod member 33 and is attracted by the static iron core 42 when the coil 44 is energized. The dynamic iron core 41 and the push rod member 33 can be connected by screwing, riveting, welding or other means.

[0084] As shown in FIG. 2, the magnetic circuit part 40 further comprises a second elastic member 46 arranged in the metal cover 27 and between the static iron core 42 and the dynamic iron core 41, for resetting the dynamic iron core 41 when the coil 44 is de-energized.

[0085] In an embodiment, the second elastic member 46 is a spring and is sleeved on the outer periphery of the push rod member 33.

[0086] It should be noted that when the coil 44 is energized, the static iron core 42 attracts the dynamic iron core 41 to move upward, and the dynamic iron core 41 can drive the push rod member 33 to move upward. When the movable contact 31 contacts the static contact 22, the movable contact 31 is stopped by the static contact 22, and the push rod member 33 will continue to move upward until the overstroke is completed.

[0087] During the overstroke, the first elastic member 32 can provide an elastic force to the movable contact 31 after being pressed by the push rod member 33, so as to provide a contact pressure.

[0088] As shown in FIG. 2, the magnetic circuit part 40 further comprises a U-shaped yoke 47 and a magnetic conducting cylinder 45. The U-shaped yoke 47 comprises a bottom yoke plate 471 and two side yoke plates 472 connected to the two ends of the bottom yoke plate 471 along the first direction D1 and oppositely arranged along the first direction D1. The bottom yoke plate 471 is arranged on the side of the coil holder 43 away from the static contact 22, and the ends of the two side yoke plates 472 away from the bottom yoke plate 471 are connected to the two ends of the yoke plate 25 along the first direction D1. The coil 44, the coil holder 43, the metal cover 27 and the dynamic iron core 41 are contained in the space surrounded 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 conducting cylinder 45 is sleeved on the outer periphery of the metal cover 27, and the magnetic conducting cylinder 45 is located between the metal cover 27 and the coil holder 43.

[0089] Continuing to refer to FIG. 2, the base 12 is bonded to a side surface of the bottom yoke plate 471 away from the yoke plate 25, the bottom yoke plate 471 has a glue accommodating hole 4711, and the base 12 protrudes a protruding portion 121 toward the side surface of the bottom yoke plate 471, the protruding portion 121 is inserted into the glue accommodating hole 4711, and a glue layer is filled between the protruding portion 121 and a hole wall surface of the glue accommodating hole 4711.

[0090] In the embodiment of the present disclosure, the base 12 is bonded to the side surface of the bottom yoke plate 471 away from the yoke plate 25 through the glue dispensing process, thereby improving the connection reliability between the base 12 and the U-shaped yoke iron 47. Meanwhile, the bottom yoke plate 471 has the glue accommodating hole 4711, the base 12 has the protruding portion 121 inserted into the glue accommodating hole 4711, the glue can seep into the glue layer between the protruding portion 121 and the hole wall surface of the glue accommodating hole 4711, the bonding area of the glue is increased, and the connection strength between the base 12 and the U-shaped yoke iron 47 is further improved.

[0091] As shown in FIG. 2, the arc extinguishing portion 26 includes permanent magnets 262, and the permanent magnets 262 are arranged on the outer side surface of the insulating cover 21. By arranging the permanent magnets 262 on the outer periphery of the insulating cover 21, a magnetic field can be formed around the static contact 22 and the moving contact 31. Therefore, through the action of the magnetic field, the arc generated between the static contact 22 and the static contact 22 is pulled in the direction away from each other, and arc extinguishing is achieved.

[0092] In the embodiment of the present disclosure, the number of the permanent magnets 262 is two, and the two permanent magnets 262 are respectively located on the two outer side surfaces of the insulating cover 21 along the first direction D1.

[0093] The arc extinguishing portion 26 further includes yoke clamps 261, and the permanent magnets 262 are arranged between the side surface of the yoke clamp 261 facing the insulating cover 21 and the outer peripheral surface of the insulating cover 21. Through the design of the yoke clamp 261 surrounding the permanent magnet 262, the magnetic field generated by the permanent magnet 262 can be prevented from spreading outward, thereby affecting the arc extinguishing effect.

[0094] In an embodiment, the yoke clamp 261 is made of soft magnetic material, which can include but is not limited to iron, cobalt, nickel, and alloys thereof.

[0095] It can be understood that the number of the yoke clamp 261 can be one or two. When the number of the yoke clamp 261 is one, the yoke clamp 261 forms a ring structure and surrounds the outer periphery of the insulating cover 21. When the number of the yoke clamp 261 is two, each yoke clamp 261 can be in a U shape and oppositely arranged along the first direction D1, and the two yoke clamps 261 respectively surround the two ends of the insulating cover 21 along the first direction D1.

[0096] As shown in FIG. 3, the relay of the embodiment of the present disclosure further comprises a circuit board 50, which is directly mechanically connected with the coil holder 43, and the coil 44 is electrically connected with the circuit board 50.

[0097] The relay of the embodiment of the present disclosure, the circuit board 50 is directly mechanically connected with the coil holder 43, and the coil 44 is electrically connected with the circuit board 50, so that the coil holder 43 plays a role of mechanically connecting the circuit board 50, which improves the firmness of the connection of the circuit board 50, and further ensures the reliability of the electrical connection between the coil 44 and the circuit board 50, and significantly improves the reliability of the relay working. At the same time, when the relay is in a large vibration environment, the circuit board 50 is stably connected with the coil holder 43, which can avoid the transmission of vibration force to the circuit board 50 to cause poor electrical connection between the coil 44 and the circuit board 50, such as solder failure or lead deformation.

[0098] It can be understood that, in an embodiment, the coil 44 can be electrically connected with the circuit board 50 by soldering through the lead-out pin 48 (FIG. 12), such as tin soldering, but not limited thereto. Specifically, the lead-out pin 48 is connected with the coil holder 43, and part of the lead-out pin 48 protrudes from the coil holder 43. The end of the coil 44 is wound around the part of the lead-out pin 48 protruding from the coil holder 43, the lead-out pin 48 is inserted into the hole of the circuit board 50, and is soldered.

[0099] Please continue to refer to FIG. 3, the coil holder 43 comprises a bobbin 431, a first flange 432 and a second flange 433, the first flange 432 is arranged at one end of the axial direction of the bobbin 431, the second flange 433 is arranged at the other end of the axial direction of the bobbin 431, the coil 44 is wound around the outer periphery of the bobbin 431, and is arranged between the first flange 432 and the second flange 433. The first flange 432 and the second flange 433 are directly mechanically connected with the circuit board 50, respectively. Wherein, the axial direction of the coil holder 43 is the axial direction of the bobbin 431.

[0100] The bobbin 431 is a hollow structure, the metal cover 27 and the magnetic conducting cylinder 45 are arranged in the cavity of the bobbin 431. The first flange 432 abuts against the yoke plate 25, and the second flange 433 is connected with the bottom yoke plate 471.

[0101] As shown in FIGS. 4-7, the outer periphery of one of the first flange 432 and the second flange 433 is provided with at least one insert 435, which can be, for example, an insert block; the circuit board 50 is provided with at least one insertion hole 510, and the at least one insert 435 is inserted into the at least one insertion hole 510 one-to-one; the at least one insert 435 includes at least one first limiting piece 4351, which can be, for example, a first limiting block; in the axial direction of the bobbin 431 (i.e., the second direction D2) and the direction perpendicular to the axial direction of the bobbin 431 and parallel to the circuit board 50 (i.e., the third direction D3), the first limiting piece 4351 is limited in the insertion hole 510. For the convenience of description, the insertion hole 510 into which the first limiting piece 4351 is inserted is defined as a first insertion hole 510a.

[0102] In the embodiments of the present disclosure, in the axial direction of the bobbin 431 (i.e., the second direction D2) and the direction perpendicular to the axial direction of the bobbin 431 and parallel to the circuit board 50 (i.e., the third direction D3), the first limiting piece 4351 is limited in the first insertion hole 510a, so that the bobbin 43 and the circuit board 50 are limitedly connected, ensuring the reliability of the connection of the circuit board 50.

[0103] It can be understood that the insert 435 can be provided on the outer periphery of the first flange 432, or the insert 435 can be provided on the outer periphery of the second flange 433. Next, the insert 435 provided on the outer periphery of the first flange 432 is taken as an example for description, but it is not limited thereto.

[0104] It should be noted that the number of the insertion holes 510 provided on the circuit board 50 is at least one, i.e., the number of the insertion holes 510 can be one, two, three, or other numbers. Similarly, the number of the inserts 435 provided on the outer periphery of the first flange 432 is at least one, i.e., the number of the inserts 435 can be one, two, three, or other numbers. The number of the insertion holes 510 is equal to the number of the inserts 435.

[0105] When the number of the inserts 435 is one, the insert 435 is the first limiting piece 4351. When the number of the inserts 435 is two or more, the number of the first limiting pieces 4351 can be one or two, or all the inserts 435 are the first limiting pieces 4351.

[0106] In the embodiments of the present disclosure, the number of the inserts 435 and the number of the insertion holes 510 are both two, and one of the inserts 435 is the first limiting piece 4351.

[0107] As shown in FIGS. 5 and 6, the hole wall surface of the first insertion hole 510a into which the first limiting piece 4351 is inserted is further provided with a plurality of first limiting protrusions 511, the plurality of first limiting protrusions 511 are arranged along the circumferential direction of the first insertion hole 510a, and the plurality of first limiting protrusions 511 abut against the outer peripheral surface of the first limiting piece 4351.

[0108] In the embodiments of the present disclosure, the first limiting member 4351 is in contact with the plurality of first limiting protrusions 511, but not directly in contact with the hole wall surface of the first insertion hole 510a, thereby reducing the abrasion between the first limiting member 4351 and the first insertion hole 510a.

[0109] The number of the first limiting protrusions 511 can be two, three, four or other numbers. The plurality of first limiting protrusions 511 are arranged uniformly or non-uniformly along the circumference of the first insertion hole 510a.

[0110] In an embodiment, the first limiting member 4351 is in interference fit with the plurality of first limiting protrusions 511.

[0111] Of course, in other embodiments, the first limiting protrusions 511 can also not be arranged in the first insertion hole 510a into which the first limiting member 4351 is inserted, but the first limiting member 4351 is inserted into the first insertion hole 510a, and the first limiting member 4351 is directly in interference fit or clearance fit with the first insertion hole 510a.

[0112] Please continue to refer to FIGS. 5 and 6, the at least one insert 435 includes at least one second limiting member 4352, which can be a second limiting block for example. In the axial direction of the bobbin 431 or in the direction perpendicular to the axial direction of the bobbin 431 and parallel to the circuit board 50 (i.e., the third direction D3), the second limiting member 4352 is limited in the insertion hole 510. Among them, for the convenience of description, the insertion hole 510 into which the second limiting member 4352 is inserted is defined as a second insertion hole 510b.

[0113] In the embodiments of the present disclosure, for the first limiting member 4351, in the axial direction of the bobbin 431 (i.e., the second direction D2) and in the direction perpendicular to the axial direction of the bobbin 431 and parallel to the circuit board 50 (i.e., the third direction D3), the first limiting member 4351 is limited in the first insertion hole 510a; for the second limiting member 4352, in the axial direction of the bobbin 431 (i.e., the second direction D2) or in the direction perpendicular to the axial direction of the bobbin 431 and parallel to the circuit board 50 (i.e., the third direction D3), the second limiting member 4352 is limited in the second insertion hole 510b. That is, the first limiting member 4351 and the circuit board 50 are limited in two directions, which plays a role of precise limiting, and the second limiting member 4352 and the circuit board 50 are limited in only one direction, and the other direction is empty, i.e., not limited, which plays a role of avoiding excessive limiting. By such arrangement, the problem that the bobbin 43 and the circuit board 50 cannot be assembled and limited due to the low machining precision of the bobbin 43 and / or the circuit board 50 can be prevented.

[0114] It should be noted that when the number of the inserts 435 is more than two, some of the inserts 435 are the first limiting members 4351, and the other inserts 435 are the second limiting members 4352. In the embodiment of the present disclosure, the number of the inserts 435 is two, and one of the inserts 435 is the first limiting member 4351, and the other insert 435 is the second limiting member 4352.

[0115] Further, when the number of the inserts 435 is more than two, all of the inserts 435 can be the first limiting members 4351, and cannot be the second limiting members 4352.

[0116] As shown in FIGS. 5 and 6, the hole wall surface of the second insertion hole 510b into which the second limiting member 4352 is inserted further protrudes a plurality of second limiting protrusions 512, and the plurality of second limiting protrusions 512 abut against the outer circumferential surface of the second limiting member 4352. The plurality of second limiting protrusions 512 are divided into two parts, and the two parts of the second limiting protrusions 512 are arranged on two oppositely arranged hole walls in the second insertion hole 510b. The two hole walls are oppositely arranged along the axial direction of the winding drum 431 (the up-down direction in FIG. 6) or the direction perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50 (the left-right direction in FIG. 6).

[0117] In the embodiment of the present disclosure, the second limiting member 4352 is in contact with the plurality of second limiting protrusions 512, and is not directly in contact with the hole wall surface of the second insertion hole 510b, thereby reducing the abrasion between the second limiting member 4352 and the second insertion hole 510b.

[0118] The number of the second limiting protrusions 512 can be two, three, four, or other numbers. In the embodiment of the present disclosure, the number of the second limiting protrusions 512 is two, and the two second limiting protrusions 512 are oppositely arranged in the second direction D2, but are not limited thereto.

[0119] In an embodiment, the second limiting member 4352 is in interference fit with the plurality of second limiting protrusions 512.

[0120] It can be understood that the first limiting protrusions 511 can not be protruded on the hole wall surface of the first insertion hole 510a, but can be arranged on the outer circumferential surface of the first limiting member 4351.

[0121] For example, as shown in FIG. 8, the outer circumferential surface of the first limiting member 4351 further protrudes a plurality of first limiting protrusions 511, the plurality of first limiting protrusions 511 are arranged along the circumferential direction of the first limiting member 4351, and the plurality of first limiting protrusions 511 abut against the inner wall surface of the first insertion hole 510a.

[0122] In an embodiment, the plurality of first limiting protrusions 511 are in interference fit with the first insertion hole 510a.

[0123] For example, as shown in FIG. 9, the outer circumferential surface of the first limiting member 4351 further protrudes a plurality of first limiting protrusions 511, which abut against the inner wall surface of the first insertion hole 510a, and part of the outer circumferential surface of the first limiting member 4351 also abuts against the inner wall surface of the first insertion hole 510a.

[0124] It should be noted that in an embodiment, the arrangement of the plurality of first limiting protrusions 511 between the corresponding first limiting member 4351 and the first insertion hole 510a can also be that part of the first limiting protrusions 511 protrude from the outer circumferential surface of the first limiting member 4351, and the remaining first limiting protrusions 511 protrude from the hole wall surface of the first insertion hole 510a.

[0125] It can be understood that the second limiting protrusions 512 can not protrude from the hole wall surface of the second insertion hole 510b, but be arranged on the outer circumferential surface of the second limiting member 4352.

[0126] For example, as shown in FIG. 10, the outer circumferential surface of the second limiting member 4352 further protrudes a plurality of second limiting protrusions 512, which abut against the hole 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 arranged on the two oppositely arranged outer surfaces of the second limiting member 4352, respectively; wherein the two outer surfaces are oppositely arranged along the axial direction of the winding drum 431 or the direction perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50.

[0127] In an embodiment, the plurality of second limiting protrusions 512 are in interference fit with the second insertion hole 510b.

[0128] In the embodiments of the present disclosure, the number of second limiting protrusions 512 is two, and the two second limiting protrusions 512 are oppositely arranged along the second direction D2, but this is not the only way.

[0129] In addition, the design that the second limiting member 4352 and the second insertion hole 510b are limited in only one direction and not limited in another direction can also not be achieved by arranging the second limiting protrusions 512, but by designing the shape of the second insertion hole 510b as a racetrack shape.

[0130] For example, as shown in FIG. 11, the second insertion hole 510b into which the second limiting member 4352 is inserted is in the shape of a racetrack, the racetrack-shaped second insertion hole 510b has two straight hole walls and two arc-shaped hole walls respectively connecting the two ends of the two straight hole walls, and the cross-sectional shape of the second limiting member 4352 is circular; the second limiting member 4352 is limited between the two straight hole walls of the racetrack-shaped second insertion hole 510b. Among them, the two straight hole walls of the racetrack-shaped straight hole walls can be oppositely arranged in the axial direction (second direction D2) of the winding drum 431, or can be oppositely arranged in the direction perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50.

[0131] It should be noted that in an embodiment, the arrangement of the plurality of second limiting protrusions 512 between the corresponding second limiting member 4352 and the second insertion hole 510b can also be that part of the second limiting protrusions 512 are protruded from the outer peripheral surface of the second limiting member 4352, and the rest of the second limiting protrusions 512 are protruded from the hole wall surface of the second insertion hole 510b.

[0132] As shown in FIGS. 6, 7 and 12, the outer peripheral edge of the second flange 433 of the first flange 432 and the second flange 433 is provided with a limiting protrusion 436; the outer peripheral edge of the circuit board 50 is also provided with a notch 520, and the limiting protrusion 436 passes through the notch 520, for limiting 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 (third direction D3).

[0133] It should be noted that the limiting protrusion 436 can be protruded from the outer peripheral edge of the first flange 432, or can be protruded from the outer peripheral edge of the second flange 433. In other words, the insert 435 and the limiting protrusion 436 are respectively protruded from the outer peripheral edge of the first flange 432 and the outer peripheral edge of the second flange 433. Next, the case where the limiting protrusion 436 is protruded from the second flange 433 will be described, but it should not be limited thereto.

[0134] It can be understood that since the outer peripheral edge of the circuit board 50 is provided with the notch 520, the notch 520 is in a semi-open structure, therefore in the opening direction of the notch 520, the limiting protrusion 436 does not limit the circuit board 50, but only limits 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, facilitating the disassembly of the circuit board 50.

[0135] Therefore, when the circuit board 50 is assembled with the coil holder 43, the opening of the circuit board 50 is aligned with the limiting protrusion 436, and the limiting protrusion 436 is inserted through the gap 520, and then the circuit board 50 is rotated around the position where the circuit board 50 is in contact with the limiting protrusion 436, so that the plug-in part 435 is inserted into the insertion hole 510, and thus the limiting assembly of the circuit board 50 and the coil holder 43 is completed.

[0136] In an embodiment, the limiting protrusion 436 and the position of the at least one plug-in part 435 correspond in the axial direction (second direction D2) of the bobbin 431, so that the position of the at least one insertion hole 510 of the circuit board 50 and the gap 520 correspond in the axial direction (second direction D2) of the bobbin 431.

[0137] Please continue to refer to FIGS. 6, 7 and 12, the limiting protrusion 436 includes a connecting part 4361 and an abutting part 4362, the connecting part 4361 is protruded on the outer periphery of the second flange 433 and passes through the gap 520 on the circuit board 50, and the abutting part 4362 is connected to the end of the connecting part 4361 and abuts against the side surface of the circuit board 50 away from the coil 44.

[0138] In the embodiment of the present disclosure, the connecting part 4361 is protruded on the outer periphery of the second flange 433, and the abutting part 4362 is connected to the end of the connecting part 4361 away from the second flange 433.

[0139] The abutting part 4362 includes two barbs 4363 protruding from the outer periphery of the connecting part 4361, and the two barbs 4363 are oppositely arranged in the direction perpendicular to the axial direction of the bobbin 431 and parallel to the circuit board 50, and respectively abut against the side surface of the circuit board 50 away from the coil 44. By arranging the two barbs 4363, the circuit board 50 can be limited.

[0140] Therefore, the limiting protrusion 436 of the coil holder 43 of the embodiment of the present disclosure not only facilitates the installation of the circuit board 50, but also limits the circuit board 50.

[0141] In an embodiment, the abutting part 4362 has a dovetail shape in the orthogonal projection shape on the plane of the side surface of the first flange 432 facing the second flange 433. Of course, the shape of the abutting part 4362 is not limited to the dovetail shape.

[0142] As shown in FIGS. 5 and 7, the side of the plug-in part 435 away from the limiting protrusion 436 has an inclined surface 4353, which is arranged inclinedly relative to the thickness direction of the circuit board 50, for guiding the plug-in part 435 to be inserted into the insertion hole 510.

[0143] When the limiting protrusion 436 passes through the gap 520, and the circuit board 50 is rotated about the position where the circuit board 50 is in contact with the limiting protrusion 436, the inclined surface 4353 can be in guided contact with the hole wall surface of the insertion hole 510, so as to guide the plug-in part 435 to be accurately inserted into the insertion hole 510.

[0144] It is worth mentioning that, in the embodiment of the present disclosure, the limiting structure of the circuit board 50 and the first flange 432 is limited by the plug-in part 435 and the insertion hole 510. Since the first limiting part 4351 and the circuit board 50 are limited in two directions, the function of accurate limiting is achieved, and the second limiting part 4352 and the circuit board 50 are limited in only one direction, and the function of avoiding excessive limiting is achieved, so that the problem that the coil holder 43 and the circuit board 50 cannot be assembled due to low machining precision of the coil holder 43 and / or the circuit board 50 can be prevented.

[0145] The limiting structure of the circuit board 50 and the second flange 433 is limited by the limiting protrusion 436 and the gap 520. Since the gap 520 is a semi-open structure, the limiting protrusion 436 does not limit the circuit board 50 in the opening direction of the gap 520, but only limits 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, facilitating disassembly and assembly of the circuit board 50.

[0146] Therefore, when the circuit board 50 and the coil holder 43 are assembled, the opening of the circuit board 50 is aligned with the limiting protrusion 436, the limiting protrusion 436 passes through the gap 520, and then the circuit board 50 is rotated about the position where the circuit board 50 is in contact with the limiting protrusion 436, so that the plug-in part 435 is inserted into the insertion hole 510, and the circuit board 50 and the coil holder 43 are assembled and limited. As can be seen, under the combined action of the plug-in part 435 and the insertion hole 510, and the limiting protrusion 436 and the gap 520, when the circuit board 50 and the coil holder 43 are disassembled, the circuit board 50 and the coil holder 43 have a movable space in the second direction D2, so that the disassembly and assembly of the two are facilitated, and the normal assembly of the circuit board 50 and the coil holder 43 can be affected due to the deformation of the coil holder 43.

[0147] As shown in FIGS. 7 and 13, the yoke plate 25 includes a plate body 252 and a positioning protrusion 253, and the positioning protrusion 253 is protruded from one side surface of the plate body 252 in the thickness direction (the second direction D2). The coil holder 43 abuts against the side surface of the plate body 252 where the positioning protrusion 253 is protruded; the coil holder 43 has a positioning hole 434, and the positioning protrusion 253 is limited in the positioning hole 434.

[0148] It can be understood that the relay of the embodiment of the present disclosure, the yoke plate 25 has the positioning protrusion 253, the coil holder 43 has the positioning hole 434, the positioning protrusion 253 is limited in the positioning hole 434, so as to ensure the assembly accuracy between the yoke plate 25 and the coil holder 43. In addition, since the positioning protrusion 253 is arranged on the yoke plate 25, the strength of the positioning protrusion 253 is stronger, and when the relay is in an environment with strong vibration, the positioning protrusion 253 is not easy to break, and in cooperation with the positioning hole 434, the reliable positioning effect can still be maintained, the assembly accuracy of the yoke plate 25 and the coil holder 43 is ensured, and the working reliability of the entire relay product is improved.

[0149] In an embodiment, the yoke plate 25 is made of a metal material, and the coil holder 43 is made of an insulating material. Further, the insulating material can be plastic, but is not limited thereto.

[0150] 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 holder 43 can be one or more, and the number of positioning protrusions 253 is equal to the number of positioning holes 434.

[0151] When the number of positioning protrusions 253 and the number of positioning holes 434 are both one, the cross-sectional shape of the positioning protrusion 253 is non-circular, such as rectangular, oval, triangular, etc., and the shape of the positioning hole 434 is adapted to the cross-sectional shape of the positioning protrusion 253.

[0152] When the number of positioning protrusions 253 and the number of positioning holes 434 are both multiple, 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 limit the relative rotation of the yoke plate 25 and the coil holder 43.

[0153] As shown in FIG. 13, in the embodiment of the present disclosure, the yoke plate 25 includes two positioning protrusions 253, the two positioning protrusions 253 are arranged at intervals along the first direction D1, and each positioning protrusion 253 is cylindrical, but is not limited thereto.

[0154] Please continue to refer to FIG. 7, the first flange 432 is provided with two positioning holes 434, the two positioning holes 434 are arranged at intervals along the first direction D1, and the shape of each positioning hole 434 is circular. Each positioning hole 434 can be a blind hole or a through hole. In the embodiment of the present disclosure, the positioning hole 434 is a blind hole.

[0155] As shown in FIG. 14, the hole wall surface of the positioning hole 434 is further provided with a plurality of protrusions 254, the plurality of protrusions 254 are arranged along the circumference of the positioning hole 434, and the plurality of protrusions 254 abut against the outer circumferential surface of the positioning protrusion 253. It should be noted that the protrusions 254 in the plurality of positioning holes 434 can all abut against the outer circumferential surface of the positioning protrusion 253, or part of the protrusions 254 in the positioning holes 434 can abut against the outer circumferential surface of the positioning protrusion 253, and the remaining protrusions 254 in the positioning holes 434 can abut against or not abut against the outer circumferential surface of the positioning protrusion 253.

[0156] In another embodiment, the arrangement of the plurality of protrusions 254 between the outer circumferential surface of the corresponding positioning protrusion 253 and the hole wall surface of the positioning hole 434 can also be that part of the protrusions 254 are provided on the outer circumferential surface of the positioning protrusion 253, and the remaining protrusions 254 are provided on the hole wall surface of the positioning hole 434.

[0157] In the embodiments of the present disclosure, the positioning protrusion 253 of the yoke plate 25 is in contact with the plurality of protrusions 254, but not directly in contact with the hole wall surface of the positioning hole 434, which reduces the wear between the positioning protrusion 253 and the positioning hole 434, and further improves the reliability of positioning.

[0158] In the embodiments of the present disclosure, the positioning protrusion 253 of the yoke plate 25 is in contact with the plurality of protrusions 254, but not directly in contact with the hole wall surface of the positioning hole 434, which reduces the wear between the positioning protrusion 253 and the positioning hole 434, and further improves the reliability of positioning.

[0159] In an embodiment, the positioning protrusion 253 and the plurality of protrusions 254 are in interference fit.

[0160] Of course, in other embodiments, the positioning hole 434 can also not be provided with the protrusion 254, but the positioning protrusion 253 is inserted into the positioning hole 434, and the positioning protrusion 253 and the positioning hole 434 are in interference fit or clearance fit.

[0161] Please continue to refer to FIG. 14, a line segment AB is formed between the centers of the two positioning holes 434, the line segment AB has a median line L1 which is parallel to the plate body 252; and the arrangement of the plurality of protrusions 254 in the two positioning holes 434 is not symmetrically arranged with respect to the median line L1.

[0162] For example, the three protrusions 254 in the positioning hole 434 are arranged at 10 o'clock, 2 o'clock and 6 o'clock directions in the positioning hole 434 on the left side of FIG. 7, and the three protrusions 254 in the positioning hole 434 are arranged at 12 o'clock, 4 o'clock and 8 o'clock directions in the positioning hole 434 on the right side of FIG. 7. In other words, the arrangement directions of the three protrusions 254 in the two positioning holes 434 are staggered, which can effectively reduce the assembly precision requirement between the yoke plate 25 and the coil support 43, and solve the problem that the yoke plate 25 and / or the coil support 43 cannot be assembled due to manufacturing tolerances.

[0163] Referring back to FIG. 7, each protrusion 254 has a guide slope 2541, which has an included angle with the axis of the positioning hole 434, and the guide slope 2541 is used to guide the positioning protrusion 253 to be inserted into the positioning hole 434. By arranging the guide slope 2541 on the protrusion 254, when the yoke plate 25 and the coil support 43 are assembled, the guide slope 2541 can guide the positioning protrusion 253 to be accurately inserted into the positioning hole 434.

[0164] As shown in FIG. 15, it can be understood that in other embodiments, the protrusions 254 can also not be arranged in the positioning hole 434, but arranged on the positioning protrusion 253.

[0165] As shown in FIG. 15, specifically, the outer circumferential surface of the positioning protrusion 253 is further provided with a plurality of protrusions 254, the plurality of protrusions 254 are arranged along the circumferential direction of the positioning protrusion 253, and the plurality of protrusions 254 abut against the inner wall surface of the positioning hole 434. Among them, the plurality of protrusions 254 of the plurality of positioning protrusions 253 can all abut against the inner wall surface of the positioning hole 434, or part of the protrusions 254 of the positioning protrusions 253 can abut against the inner wall surface of the positioning hole 434, and the remaining protrusions 254 of the positioning protrusions 253 can abut against the inner wall surface of the positioning hole 434 or not.

[0166] In an embodiment, the positioning hole 434 is in interference fit with the plurality of protrusions 254.

[0167] Of course, in other embodiments, the positioning hole 434 can also not be provided with the protrusions 254, but the positioning protrusion 253 is inserted into the positioning hole 434, and the positioning protrusion 253 is in interference fit or clearance fit with the positioning hole 434.

[0168] In an embodiment, the yoke plate 25 includes two positioning protrusions 253, a line segment CD is formed between the centers of the two positioning protrusions 253, and the line segment CD has a median line L2 parallel to the plate body 252; the arrangement directions of the plurality of protrusions 254 on the outer circumferences of the two positioning protrusions 253 are not symmetrically arranged with respect to the median line L2.

[0169] It can be understood that the arrangement direction of the three protrusions 254 outside the periphery of the two positioning protrusions 253 is staggered, and such an arrangement can effectively reduce the assembly precision requirement between the yoke plate 25 and the coil holder 43, and solve the problem that the yoke plate 25 and / or the coil holder 43 cannot be assembled due to manufacturing tolerances.

[0170] In summary, the relay of the embodiment of the present disclosure has at least the following advantages and beneficial effects:

[0171] The relay of the embodiment of the present disclosure directly mechanically connects the circuit board 50 with the coil holder 43, and electrically connects the coil 44 with the circuit board 50, so that the coil holder 43 plays a role of mechanically connecting the circuit board 50, improves the firmness of the connection of the circuit board 50, and further ensures the reliability of the electrical connection between the coil 44 and the circuit board 50, and significantly improves the reliability of the relay in operation. At the same time, when the relay is in a large vibration environment, the stable connection between the circuit board 50 and the coil holder 43 can avoid the transmission of vibration force to the circuit board 50, which causes poor electrical connection between the coil 44 and the circuit board 50, such as welding point failure or lead deformation.

[0172] Further, the first limiting member 4351 and the circuit board 50 are limited in two directions, which plays a role of accurate limiting, and the second limiting member 4352 and the circuit board 50 are limited in only one direction and not limited in the other direction, which plays a role of avoiding excessive limiting. In this way, it can prevent the coil holder 43 and / or the circuit board 50 from being unable to be assembled due to low processing precision.

[0173] Further, since the outer periphery of the circuit board 50 is provided with the notch 520, the notch 520 is a semi-open structure, so in the opening direction of the notch 520, the limiting protrusion 436 does not limit the circuit board 50, but only limits the circuit board 50 in the thickness direction of the circuit board 50 and in the direction perpendicular to the axis of the winding drum 431 and parallel to the circuit board 50, facilitating the disassembly of the circuit board 50.

[0174] Further, under the joint action of the plug-in part 435 and the plug hole 510, and the limiting protrusion 436 and the notch 520, the circuit board 50 and the coil holder 43 have a movable space in the second direction D2 when disassembling the circuit board 50 and the coil holder 43, which facilitates the disassembly of the two, and can avoid the influence of the deformation of the coil holder 43 on the normal assembly of the circuit board 50 and the coil holder 43.

[0175] It can be understood that the various embodiments / implementation provided by the present disclosure can be combined with each other without contradiction, which will not be illustrated one by one here.

[0176] In the embodiments of the application, the terms "first", "second", "third" are only used for descriptive purpose and should not be understood as indicating or implying relative importance. The term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connection", "fixing" and the like should be interpreted broadly, for example, "connection" can be fixed connection, detachable connection, or integral connection; "connection" can be direct connection or indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0177] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only intended to facilitate the description of the embodiments of the application and simplify the description, and are not intended to indicate or imply that the device or unit referred to must have a particular direction, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the embodiments of the application.

[0178] In the description of the present specification, the terms "one embodiment", "some embodiments", "a specific embodiment", and the like, mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0179] The above is only the preferred embodiment of the application, and is not intended to limit the application. Those skilled in the art can make various modifications and changes to the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application should be included in the protection scope of the application.

Claims

1. A relay, characterized in that: include: Coil former; A coil, wound around the outer periphery 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-in 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 socket, and the at least one plug-in is inserted into the at least one socket in a one-to-one correspondence; The at least one plug-in unit includes at least one first stopper; The first limiting member is limited in the insertion hole in the axial direction of the winding drum, and the first limiting member is limited in the insertion hole 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 protrusions are further provided between the outer circumferential surface of the first limiting member and the wall surface of the insertion hole, and the plurality of first limiting 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 protrusions are convexly provided on the wall surface of the insertion hole into which the first limiting member is inserted, and the plurality of first limiting protrusions abut against the outer peripheral surface of the first limiting member.

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

7. The relay according to claim 4, characterized in that A plurality of first limiting protrusions are convexly provided on the outer peripheral surface of the first limiting member, and the plurality of first limiting 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 plug-in unit includes at least one second stopper; The upper limit of the axial direction of the second limiting member is located in the insertion hole of the winding drum, or the upper limit of the second limiting member is located in the insertion hole 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 member 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 member is inserted; the plurality of second limiting protrusions abut against the outer peripheral surface of the second limiting member; The plurality of second limiting protrusions are divided into two parts, and the two parts of the second limiting protrusions are respectively arranged on two oppositely disposed hole walls in the jack; 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 member is interference-fitted with the plurality of second limiting protrusions.

13. The relay according to claim 10, wherein: A plurality of second limiting protrusions are convexly provided on the outer peripheral surface of the second limiting member; the plurality of second limiting protrusions abut against the wall surface of the insertion hole; The multiple second limiting protrusions are divided into two parts, and the two parts of the second limiting protrusions are respectively arranged on two oppositely set outer surfaces of the second limiting member; 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, wherein: The plurality of second limiting protrusions are interference fit with the insertion hole.

15. The relay according to claim 9, characterized in that The insertion hole into which the second limiting member is inserted has a runway shape, and the cross-sectional shape of the second limiting member is circular; The second limiting member is limited between two straight hole walls of the racetrack-shaped insertion hole.

16. The relay according to claim 3, characterized in that A limiting protrusion is provided on the outer periphery of the one of the first flange and the second flange into which the plug-in is not inserted; A notch is further provided on the outer periphery of the circuit board, and the limiting protrusion passes through the notch 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 connecting portion and an abutting portion. The connecting portion is protruded from the outer periphery of one of the first flange and the second flange into which the plug-in is not inserted, and passes through the notch. The abutting portion is connected to the end of the connecting portion and abuts against a surface of the circuit board on one side facing away from the coil.

18. The relay according to claim 17, wherein: The abutting portion includes two barbs protruding from the outer peripheral surface of the connecting 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 plug-in has an inclined surface on a side facing away from the limiting protrusion. The inclined surface is arranged obliquely relative to the thickness direction of the circuit board and is used to guide the plug-in to be inserted into the jack.

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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