Limiting structure and relay

Abstract

The utility model discloses a limiting structure and a relay, the limiting structure comprises a first part and a second part, and the first part is provided with at least two protruding parts; the second part is provided with at least two assembly holes, and the at least two protruding parts are limited in the at least two assembly holes respectively; a plurality of protrusions are further arranged between the outer peripheral face of the corresponding protruding part and the hole wall face of the assembly hole and arranged in the circumferential direction of the assembly hole.

Description

Technical Field

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

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

[0003] The relay includes multiple components, and the multiple components are assembled as required. For example, a high-voltage DC relay is a type of relay, which includes an insulating cover, a yoke plate, a coil frame, a circuit board, etc. The insulating cover is located on one side of the yoke plate in the thickness direction, and the coil frame is located on the other side of the yoke plate in the thickness direction. During assembly, the yoke plate and the coil frame, as well as the coil frame and the circuit board, need to be assembled.

[0004] However, in the prior art, due to the dispersion of components, the assembly accuracy between the components is affected, and even the problem of two components being unable to be assembled may occur. Utility Model Content

[0005] The embodiments of the present application provide a method that can alleviate, to a certain extent, the problem of components being unable to be assembled due to component dispersion.

[0006] The limiting structure of the embodiment of the present application includes:

[0007] A first component having at least two protrusions;

[0008] The second component has at least two assembly holes, and at least two of the protrusions are respectively confined within the at least two assembly holes;

[0009] Wherein, a plurality of convex buds are provided between the outer peripheral surface of the corresponding protruding portion and the hole wall surface of the assembly hole, and the plurality of convex buds are arranged along the circumference of the assembly hole.

[0010] According to some embodiments of the present application, each of the protrusions is integrally provided on one of the outer peripheral surface of the raised portion and the hole wall surface of the assembly hole, and at least one group of corresponding multiple protrusions between the raised portion and the assembly hole abuts against the other of the outer peripheral surface of the raised portion and the hole wall surface of the assembly hole.

[0011] According to some embodiments of the present application, the number of the protrusions is two, the number of the assembly holes is two, and a line segment is formed between the centers of the two assembly holes;

[0012] The two pairs of corresponding protrusions and the two groups of convex bumps in the assembly hole are not symmetrically arranged about the perpendicular midline of the line segment.

[0013] According to some embodiments of the present application, each of the convex bulges has a guiding slope, and an angle is formed between the guiding slope and the axis of the assembly hole, and the guiding slope is used to guide the protrusion to be inserted into the assembly hole.

[0014] According to some embodiments of the present application, the at least two protrusions include a first limit block and a second limit block, and the at least two assembly holes include a first plug hole and a second plug hole;

[0015] In the first limiting direction and the second limiting direction, the first limiting block is limited in the first insertion hole; in the first limiting direction or the second limiting direction, the second limiting block is limited in the second insertion hole;

[0016] Among them, a plurality of protrusions are provided between the outer circumferential surface of the first limiting block and the hole wall surface of the first plug hole, and between the outer circumferential surface of the second limiting block and the hole wall surface of the second plug hole; and the first limiting direction is perpendicular to the second limiting direction.

[0017] According to some embodiments of the present application, a plurality of convex buds are convexly provided on the wall surface of the second plug hole, and the plurality of convex buds abut against the outer peripheral surface of the second limit block;

[0018] The plurality of convex buds are divided into two parts, and the two parts of the convex buds are respectively arranged on two oppositely disposed hole walls in the second insertion hole; wherein the two hole walls are oppositely disposed along the first limiting direction or the second limiting direction.

[0019] According to some embodiments of the present application, a plurality of convex buds are convexly provided on the outer peripheral surface of the second limit block, and the plurality of convex buds abut against the hole wall surface of the second plug hole;

[0020] The plurality of convex buds are divided into two parts, and the two parts of the convex buds are respectively arranged on two oppositely disposed outer surfaces of the second limiting block; wherein the two outer surfaces are oppositely disposed along the first limiting direction or the second limiting direction.

[0021] According to some embodiments of the present application, the first limit block and the second limit block are both provided with an inclined surface, and the inclined surface is inclined relative to the thickness direction of the second component, and is used to respectively guide the first limit block to be inserted into the first socket, and to guide the second limit block to be inserted into the second socket.

[0022] According to some embodiments of the present application, the other of the outer peripheral surface of the protrusion and the hole wall surface of the assembly hole is interference fit with the convex bud.

[0023] The relay of the embodiment of the present application includes any of the above-mentioned limiting structures.

[0024] According to some embodiments of the present application, the first component is a yoke iron plate, and the second component is a coil frame.

[0025] According to some embodiments of the present application, the first component is a coil frame, and the second component is a circuit board.

[0026] One embodiment of the above application has at least the following advantages or beneficial effects:

[0027] In the limiting structure of the embodiment of the present application, the first component and the second component are assembled in such a way that a protrusion is limited in the assembly hole, and a plurality of convex buds are provided between the outer peripheral surface of the corresponding protrusion and the hole wall surface of the assembly hole. The plurality of convex buds are arranged along the circumference of the assembly hole, so that the problem of assembly inconvenience or even inability to assemble due to the dispersion of the components can be solved by adjusting the position and / or number of the convex buds.

[0028] Furthermore, the two pairs of corresponding protrusions and the two groups of convex buds in the assembly hole are not symmetrically arranged about the perpendicular bisector of the line segment, which can effectively reduce the assembly accuracy requirements between the first component and the second component and solve the problem that the first component and / or the second component cannot be assembled due to manufacturing tolerances.

[0029] Furthermore, by providing a guiding slope on the convex burl, when the first component is assembled with the second component, the guiding slope can guide the protrusion to be accurately inserted into the assembly hole.

[0030] Furthermore, when the protrusion of the first component is the positioning protrusion of the yoke plate, and the assembly hole of the second component is the positioning hole of the coil frame, the positioning protrusion is limited in the positioning hole, thereby ensuring the assembly accuracy between the yoke plate and the coil frame. In addition, since the positioning protrusion is set on the yoke plate, the strength of the positioning protrusion is stronger. When the relay is in a strong vibration environment, the positioning protrusion is not easy to break, and in cooperation with the positioning hole, it can still maintain a reliable positioning effect, ensuring the assembly accuracy of the yoke plate and the coil frame, thereby improving the working reliability of the entire relay product. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic top view of a relay according to an exemplary embodiment.

[0032] Figure 2 is along Figure 1 Section view along the AA cutting line.

[0033] Figure 3 is a schematic diagram of a relay according to an exemplary embodiment, in which a housing and a base are omitted and only a yoke plate and components below the yoke plate are shown.

[0034] Figure 4 is along Figure 3 Section view along the BB cutting line.

[0035] Figure 5 Schematic diagram of a yoke iron plate according to an embodiment of the present application.

[0036] Figure 6 It is a three-dimensional schematic diagram of a coil frame according to an embodiment of the present application.

[0037] Figure 7 It is a top view schematic diagram of a coil frame according to an embodiment of the present application.

[0038] Figure 8 It is a schematic diagram of a yoke iron plate according to another embodiment of the present application.

[0039] Fig. 9 FIG. 1 is a perspective schematic diagram showing a coil frame and a circuit board after being assembled according to an exemplary embodiment.

[0040] Fig.10 FIG. 1 is a schematic side view of a coil former and a circuit board after being assembled according to an exemplary embodiment.

[0041] Fig.11 yes Fig.10 A local enlarged view of point X1 in the middle.

[0042] Fig.12 is a schematic diagram of a circuit board according to an exemplary embodiment.

[0043] Fig.13 is a schematic diagram showing that the first limiting block is limited within the first insertion hole according to another exemplary embodiment.

[0044] Fig.14 is a schematic diagram showing that the first limiting block is limited in the first insertion hole according to yet another exemplary embodiment.

[0045] Fig.15 is a schematic diagram showing that the second limiting block is limited within the second insertion hole according to another exemplary embodiment.

[0046] Fig.16 is another perspective schematic diagram showing a coil frame and a circuit board after being assembled according to an exemplary embodiment. DETAILED DESCRIPTION

[0047] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0048] 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 device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or components that are inherent to these processes, methods, products, or devices.

[0049] 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.

[0050] The housing 11 and the base 12 are connected 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 assembly 30 and the magnetic circuit part 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 the present application.

[0051] 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.

[0052] 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 parallelepiped and 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 fastened together 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 assembly 30, and the magnetic circuit part 40.

[0053] In one embodiment, the housing 11 and the base 12 are both made of insulating materials, such as plastic, but not limited thereto.

[0054] like Figure 2As shown, a 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 a static contact point is also provided at the bottom of each static contact 22, and the static contact point can 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 housing 11 and 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.

[0055] In the embodiment of the present application, two mounting holes 211 are provided on the top of the insulating cover 21, and 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 provided in the two mounting holes 211. Moreover, each static contact 22 and the insulating cover 21 can be connected by welding, but the present invention is not limited thereto.

[0056] 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 it is not limited thereto. For example, in other embodiments, the insulating cover 21 can also be made of plastic material.

[0057] 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 arranged 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.

[0058] Please continue reading Figure 2 The movable assembly 30 is movably disposed in a chamber 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.

[0059] For the convenience of explanation, the arrangement direction of the pair of stationary contacts 22 is defined as the first direction D1, and the moving direction of the moving assembly 30 is defined as the second direction D2, wherein the first direction D1 is perpendicular to the second direction D2. The direction perpendicular to both the first direction D1 and the second direction D2 is defined as the third direction D3.

[0060] 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 a pair of stationary contacts 22 .

[0061] 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.

[0062] In addition, the movable contact may protrude from the surface of the contact body on one side facing the stationary contact 22 , or may be flush with the surface of the contact body on one side facing the stationary contact 22 .

[0063] It should be noted that the number of the moving contacts 31 included in the moving assembly 30 may be one or more, wherein the number of the moving contacts 31 refers to more than two. When the number of the moving contacts 31 is multiple, the multiple moving contacts 31 are arranged side by side along the third direction D3, and the two ends of each moving contact 31 along the first direction D1 are used to contact or separate with a pair of stationary contacts 22 respectively.

[0064] The two ends of the multiple moving contacts 31 along the first direction D1 are respectively in contact with a pair of stationary contacts 22 to form a reliable parallel circuit. The number of contact points formed by the multiple moving contacts 31 and one stationary contact 22 is greater than or equal to two, achieving the effect of current shunting. In addition, according to the principle that the magnitude of the electric repulsive force is proportional to the square of the current, the magnitude of the electric repulsive force of each contact point is significantly reduced, which is conducive to the improvement of the short-circuit resistance and the reliability of the relay.

[0065] The push rod member 33 is movably disposed 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 stationary 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 stationary contact 22 .

[0066] The moving contact 31 is movably mounted on a portion of the push rod member 33 extending from a surface of the yoke iron plate 25 on one side facing the stationary contact 22. The first elastic member 32 is connected to the push rod member 33 and the moving contact 31, and is used to apply an elastic force to the moving contact 31 in the direction of the stationary contact 22 to provide contact pressure.

[0067] As an example, the first elastic member 32 is a spring, but is not limited thereto.

[0068] The side surface of the yoke iron plate 25 facing away from the static contact 22 is also covered with a metal cover 27, and the metal cover 27 covers the first through hole 251 of the yoke iron plate 25. The push rod member 33 extending from the side surface of the yoke iron plate 25 facing away from the static contact 22 is inserted into the metal cover 27.

[0069] Please continue reading Figure 2The magnetic circuit part 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 in a hollow cylindrical shape and is made of insulating material. The coil frame 43 is located on the side of the yoke iron plate 25 facing away from the stationary contact 22 and surrounds the outer periphery of the metal cover 27. The coil 44 is wound around the outer periphery of the coil frame 43.

[0070] The static iron core 42 is fixedly disposed 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, 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.

[0071] 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 moving iron core 41, and is used to reset the moving iron core 41 when the coil 44 is de-energized.

[0072] In one embodiment, the second elastic member 46 is a spring, and is sleeved on the outer circumference of the push rod member 33 .

[0073] It should be noted that when the coil 44 is energized, the stationary iron core 42 attracts the moving iron core 41 to move upward, and the moving iron core 41 can drive the push rod member 33 to move upward. When the moving contact 31 contacts the stationary contact 22, the moving contact 31 is stopped by the stationary contact 22, and the push rod member 33 will continue to move upward until the overtravel is completed.

[0074] During the overtravel process, the first elastic member 32 can provide elastic force to the moving contact 31 after being squeezed by the push rod member 33 to provide contact pressure.

[0075] like Figure 2As shown, the magnetic circuit part 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 to each other along the first direction D1. The bottom yoke plate 471 is arranged on the side of the coil frame 43 facing away from the static contact 22, and the ends of the two side yoke plates 472 away from the bottom yoke plate 471 are respectively connected to the two ends of the yoke plate 25 along the first direction D1. The coil 44, the coil frame 43, the metal cover 27 and the moving iron core 41 are accommodated in the space surrounded by the bottom yoke plate 471 and the two side yoke plates 472 of the yoke plate 25 and the U-shaped yoke 47. The magnetic tube 45 is sleeved on the outer periphery of the metal cover 27, and the magnetic tube 45 is located between the metal cover 27 and the coil frame 43.

[0076] 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.

[0077] In the embodiment of the present application, the base 12 is bonded to the side surface of the bottom yoke plate 471 facing 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 47. At the same time, the bottom yoke plate 471 has a glue hole 4711, and the base 12 has a protrusion 121 inserted into the glue hole 4711. The glue can penetrate between the protrusion 121 and the hole wall of the glue hole 4711 to form a glue layer, which increases the bonding area of ​​the glue, thereby further improving the connection strength between the base 12 and the U-shaped yoke 47.

[0078] like Figure 2 As shown, the arc extinguishing part 26 includes a permanent magnet 262, and the permanent magnet 262 is arranged on the outer side of the insulating cover 21. By arranging the permanent magnet 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 effect of the magnetic field, the arc generated between the static contact 22 and the moving contact 31 will be stretched in a direction away from each other, thereby achieving arc extinguishing.

[0079] 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.

[0080] The arc extinguishing part 26 further includes a yoke clamp 261, and a permanent magnet 262 is disposed between a side surface of the yoke clamp 261 facing the insulating cover 21 and an outer peripheral surface of the insulating cover 21. By designing that the yoke clamp 261 surrounds the permanent magnet 262, it is possible to prevent the magnetic field generated by the permanent magnet 262 from spreading outward and affecting the arc extinguishing effect.

[0081] 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.

[0082] It is understandable that the number of the yoke clips 261 can be one or two. When the number of the yoke clips 261 is one, the yoke clip 261 forms an annular structure surrounding the outer periphery of the insulating cover 21. When the number of the yoke clips 261 is two, each yoke clip 261 can be U-shaped and arranged opposite to each other along the first direction D1, and the two yoke clips 261 respectively surround the two ends of the insulating cover 21 along the first direction D1.

[0083] The limiting structure of the embodiment of the present application also includes a first component and a second component. The first component has at least two protrusions; the second component has at least two assembly holes, and the at least two protrusions are respectively limited in the at least two assembly holes; a plurality of convex buds are further provided between the outer peripheral surface of the corresponding protrusion and the hole wall surface of the assembly hole, and the plurality of convex buds are arranged along the circumference of the assembly hole.

[0084] It is understandable that the first component and the second component are assembled by limiting the protrusion in the assembly hole, and a plurality of convex buds are provided between the outer peripheral surface of the corresponding protrusion and the hole wall of the assembly hole, and the plurality of convex buds are arranged along the circumference of the assembly hole, so that the problem of assembly inconvenience or even inability to assemble caused by the dispersion of the components can be solved by adjusting the position and / or number of the convex buds. In addition, at least two assembly holes can also limit the relative rotation of the first component and the second component.

[0085] Next, the first component is the yoke plate 25 and the second component is the coil frame 43, and the first component is the coil frame 43 and the second component is the circuit board 50. In other embodiments, the first component and the second component can also be two other components that need to be assembled in the relay except the yoke plate 25, the coil frame 43 and the circuit board 50. Of course, the first component and the second component are not limited to the application in the relay, and can also be used in other fields, which will not be listed here one by one.

[0086] First, take the example that the first component is the yoke plate 25 and the second component is the coil frame 43. Figure 3 and Figure 4 As shown, the yoke plate 25 includes a plate body 252 and a positioning protrusion 253, and the positioning protrusion 253 is protrudingly provided on one side surface of the plate body 252 in the thickness direction (second direction D2). The coil frame 43 is provided on one side surface of the plate body 252 on which the positioning protrusion 253 is protruding; the coil frame 43 has a positioning hole 434, and the positioning protrusion 253 is limited in the positioning hole 434. Among them, the positioning protrusion 253 of the yoke plate 25 is defined as a protruding portion of the first component, and the positioning hole 434 of the coil frame 43 is defined as an assembly hole of the second component.

[0087] It can be understood that in the relay of the embodiment of the present application, the yoke plate 25 has a positioning protrusion 253, the coil frame 43 has a positioning hole 434, and the positioning protrusion 253 is limited in the positioning hole 434, thereby ensuring the assembly accuracy between the yoke plate 25 and the coil frame 43. In addition, since the positioning protrusion 253 is set on the yoke plate 25, the strength of the positioning protrusion 253 is stronger. 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, it can still maintain a reliable positioning effect, ensuring the assembly accuracy of the yoke plate 25 and the coil frame 43, thereby improving the working reliability of the entire relay product.

[0088] In one embodiment, the yoke plate 25 is made of metal material, and the coil frame 43 is made of insulating material. Further, the insulating material can be plastic, but is not limited thereto.

[0089] like Figure 5 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 , and each positioning protrusion 253 is cylindrical, but not limited thereto.

[0090] like Figure 6 As shown, the coil frame 43 includes a bobbin 431, a first flange 432 and a second flange 433. The bobbin 431 is a hollow structure, and the metal cover 27 and the magnetic tube 45 are arranged in the cavity of the bobbin 431. The coil 44 is wound around the outer periphery of the bobbin 431. The first flange 432 is arranged at one axial end of the bobbin 431, and the first flange 432 abuts against the plate body 252 of the yoke iron plate 25. The second flange 433 is arranged at the other axial end of the bobbin 431, and the second flange 433 is connected to the bottom yoke plate 471.

[0091] Please continue reading Figure 6 The first flange 432 is provided with two positioning holes 434, which are spaced apart along the first direction D1, and each positioning hole 434 is circular in shape. Each positioning hole 434 may be a blind hole or a through hole. In the embodiment of the present application, the positioning hole 434 is a blind hole.

[0092] like Figure 7As shown, the hole wall surface of the positioning hole 434 is also convexly provided with a plurality of sub-protrusions 254, and the plurality of sub-protrusions 254 are arranged along the circumference of the positioning hole 434, and the plurality of sub-protrusions 254 abut against the outer peripheral surface of the positioning protrusion 253. Wherein, the sub-protrusion 254 is defined as a convex bud between the outer peripheral surface of the corresponding protrusion and the hole wall surface of the assembly hole. It should be noted that at least one group of corresponding protrusions and a plurality of convex buds between the assembly hole abut against the outer peripheral surface of the protrusion. For example, in the embodiment of the present application, the sub-protrusions 254 in the plurality of positioning holes 434 may all abut against the outer peripheral surface of the positioning protrusion 253, or may be: the sub-protrusions 254 in some positioning holes 434 abut against the outer peripheral surface of the positioning protrusion 253, and the sub-protrusions 254 in the remaining positioning holes 434 may abut against the outer peripheral surface of the positioning protrusion 253, or may not abut against the outer peripheral surface of the positioning protrusion 253.

[0093] It is understandable that, in another embodiment, the sub-protrusion 254 may also be protruded from the outer peripheral surface of the positioning protrusion 253 and abut against the hole wall surface of the positioning hole 434, which will be described in detail below.

[0094] 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.

[0095] In the embodiment of the present application, the positioning protrusion 253 of the yoke iron plate 25 contacts the multiple sub-protrusions 254 instead of directly contacting the hole 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.

[0096] The number of the sub-protrusions 254 in one positioning hole 434 may be two, three, four or other numbers. The multiple sub-protrusions 254 are arranged uniformly or non-uniformly along the circumference of the positioning hole 434 .

[0097] In one embodiment, the positioning protrusion 253 is interference fit with the plurality of sub-protrusions 254 .

[0098] Please continue reading Figure 7 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 plurality of sub-protrusions 254 in the two positioning holes 434 is not symmetrical about the perpendicular midline L1 .

[0099] An example in which three sub-protrusions 254 are provided in a positioning hole 434 is used for description. Figure 7The three sub-protrusions 254 in the positioning hole 434 on the left side are respectively located at the 10 o'clock, 2 o'clock and 6 o'clock directions in the positioning hole 434, while the three sub-protrusions 254 in the positioning hole 434 on the right side are respectively located at the 12 o'clock, 4 o'clock and 8 o'clock directions in the positioning hole 434. In other words, the arrangement directions of the three sub-protrusions 254 in the two positioning holes 434 are staggered, and such an arrangement can effectively reduce the assembly accuracy requirements between the yoke iron plate 25 and the coil frame 43, and solve the problem that the two cannot be assembled due to the manufacturing tolerance of the yoke iron plate 25 and / or the coil frame 43.

[0100] Please return to Figure 6 Each sub-protrusion 254 has a guiding slope 2541, and there is an angle between the guiding slope 2541 and the axis of the positioning hole 434, and the guiding slope 2541 is used to guide the positioning protrusion 253 to be inserted into the positioning hole 434. By providing the guiding slope 2541 on the sub-protrusion 254, when the yoke iron plate 25 and the coil frame 43 are assembled, the guiding slope 2541 can guide the positioning protrusion 253 to be accurately inserted into the positioning hole 434.

[0101] like Figure 8 As shown, it can be understood that in other embodiments, the sub-protrusion 254 may not be disposed in the positioning hole 434 , but may be disposed on the positioning protrusion 253 .

[0102] like Figure 8 As shown, specifically, a plurality of sub-protrusions 254 are convexly provided on the outer circumferential surface of the positioning protrusion 253, and the plurality of sub-protrusions 254 are arranged along the circumferential direction of the positioning protrusion 253, and the plurality of sub-protrusions 254 abut against the inner wall surface of the positioning hole 434. Among them, the plurality of sub-protrusions 254 of the plurality of positioning protrusions 253 may all abut against the inner wall surface of the positioning hole 434, or: the sub-protrusions 254 of some positioning protrusions 253 abut against the inner wall surface of the positioning hole 434, and the remaining sub-protrusions 254 of the positioning protrusions 253 may abut against the inner wall surface of the positioning hole 434, or may not abut against the inner wall surface of the positioning hole 434.

[0103] In one embodiment, the positioning holes 434 are interference fit with the plurality of sub-protrusions 254 .

[0104] 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.

[0105] It is understandable 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.

[0106] Next, take the example that the first component is the coil frame 43 and the second component is the circuit board 50. Fig. 9 As shown, the relay of the embodiment of the present application further includes a circuit board 50 , 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 .

[0107] In the relay of the embodiment of the present application, 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, so that the coil frame 43 plays a role in mechanically connecting the circuit board 50, improving the firmness of the connection of the circuit board 50, thereby ensuring the reliability of the electrical connection between the coil 44 and the circuit board 50, and significantly improving the reliability of the relay operation. At the same time, when the relay is in a large vibration environment, the circuit board 50 is stably connected to the coil frame 43, which can prevent the vibration force from being transmitted to the circuit board 50 and causing poor electrical connection between the coil 44 and the circuit board 50, such as solder joint failure or lead pin deformation.

[0108] It is understood that, in one embodiment, the coil 44 can be electrically connected to the circuit board 50 by welding through the lead pins (not shown in the figure), such as soldering, but not limited thereto. Specifically, the lead pins are connected to the coil frame 43, and part of the lead pins extend out of the coil frame 43. The end of the coil 44 is wound around the part of the lead pin extending out of the coil frame 43, and the lead pins are inserted into the holes of the circuit board 50 and welded.

[0109] Of course, in other embodiments, the coil 44 may also be directly electrically connected to the circuit board 50 by welding.

[0110] Please continue reading Fig. 9 The first flange 432 and the second flange 433 are respectively directly mechanically connected to the circuit board 50 .

[0111] The winding drum 431 is a hollow structure, and the metal cover 27 and the magnetic conductive drum 45 are arranged in the cavity of the winding drum 431. The first flange 432 is in contact with the yoke iron plate 25, and the second flange 433 is connected to the bottom yoke plate 471.

[0112] like Figures 10 to 12As shown, a plurality of insert blocks 435 are protruding from the outer periphery of one of the first flange 432 and the second flange 433; the circuit board 50 is provided with a plurality of insertion holes 510, and the plurality of insert blocks 435 are correspondingly inserted into the plurality of insertion holes 510. The insert blocks 435 of the coil frame 43 are defined as the protruding portion of the first component, and the insertion holes 510 of the circuit board 50 are defined as the assembly holes of the second component.

[0113] The at least two protrusions of the first component include a first limit block 4351 and a second limit block 4352 , and the at least two assembly holes of the second component include a first plug hole 510 a and a second plug hole 510 b .

[0114] In the first limiting direction and the second limiting direction, the first limiting block 4351 is limited in the first insertion hole 510a. In the first limiting direction or the second limiting direction, the second limiting block 4352 is limited in the second insertion hole 510b. The first limiting direction is perpendicular to the second limiting direction.

[0115] In the embodiment of the present application, the first limiting direction is the axial direction of the winding drum 431 (ie, the second direction D2 ), and the second limiting direction is a direction perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50 (ie, the third direction D3 ).

[0116] In the embodiment of the present application, for the first limit block 4351, 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 plug hole 510a; for the second limit block 4352, in the axial direction of the winding drum 431 (i.e., the second direction D2) or 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 second limit block 4352 is limited in the second plug hole 510b. In other words, the first limit block 4351 and the circuit board 50 are limited in two directions, which plays a role of precise limiting, and the second limit block 4352 and the circuit board 50 are limited in only one direction, and the other direction is empty, which plays a role of avoiding excessive limiting. 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 the low processing accuracy of the coil frame 43 and / or the circuit board 50.

[0117] 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 be made by taking 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.

[0118] A plurality of convex bulges are provided between the outer circumference of the first limit block 4351 and the wall surface of the first insertion hole 510a, and the convex bulges are defined as a plurality of first limit sub-bulges 511. A plurality of convex bulges are also provided between the outer circumference of the second limit block 4352 and the wall surface of the second insertion hole 510b, and the convex bulges are defined as a plurality of second limit sub-bulges 512.

[0119] like Fig.11 and Fig.12 As shown, the hole wall surface of the first plug hole 510a inserted into the first limit block 4351 is also protruding with multiple first limit sub-protrusions 511, and the multiple first limit sub-protrusions 511 are arranged along the circumference of the first plug hole 510a, and the multiple first limit sub-protrusions 511 abut against the outer peripheral surface of the first limit block 4351.

[0120] In the embodiment of the present application, the first limit block 4351 contacts the plurality of first limit sub-protrusions 511 instead of directly contacting the wall surface of the first plug hole 510a, thereby reducing the degree of wear between the first limit block 4351 and the first plug hole 510a.

[0121] The number of the first position limiting sub-protrusions 511 may 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.

[0122] In one embodiment, the first limiting block 4351 is interference fit with the plurality of first limiting sub-protrusions 511 .

[0123] Please continue reading Fig.11 and Fig.12 The hole wall surface of the second insertion hole 510b into which the second limiting block 4352 is inserted is also provided with a plurality of second limiting sub-protrusions 512, which are in contact with the outer peripheral surface of the second limiting block 4352; the plurality of second limiting sub-protrusions 512 are divided into two parts, and the two parts of the second limiting sub-protrusions 512 are respectively arranged on two oppositely arranged hole walls in the second insertion hole 510b; wherein the two hole walls are arranged along the axial direction ( Fig.12 The vertical direction in the winding drum 431 or the direction perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50 ( Fig.12 The left and right directions in the image are relative settings.

[0124] In the embodiment of the present application, the second limit block 4352 contacts the plurality of second limit sub-protrusions 512 instead of directly contacting the wall surface of the second plug hole 510b, thereby reducing the degree of wear between the second limit block 4352 and the second plug hole 510b.

[0125] The number of the second limiting sub-protrusions 512 can be two, three, four or other numbers. 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 arranged opposite to each other in the second direction D2, but this is not limited thereto.

[0126] In one embodiment, the second limiting block 4352 is interference fit with the plurality of second limiting sub-protrusions 512 .

[0127] It is understandable that in the embodiment of the present application, the plurality of first limiting sub-protrusions 511 and the plurality of second limiting sub-protrusions 512 can refer to the above embodiment and are not arranged symmetrically with respect to the mid-perpendicular line. Such an arrangement can effectively reduce the assembly accuracy requirements between the circuit board 50 and the coil frame 43, and solve the problem that the circuit board 50 and / or the coil frame 43 cannot be assembled due to the manufacturing tolerance of the circuit board 50 and / or the coil frame 43.

[0128] It is understandable that the first limiting protrusion 511 may not be protruded from the hole wall surface of the first plug hole 510 a , but may be disposed on the outer peripheral surface of the first limiting block 4351 .

[0129] For example, Fig.13 As shown, the outer circumferential surface of the first limit block 4351 is also 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.

[0130] In one embodiment, the plurality of first limiting protrusions 511 are interference fit with the first insertion holes 510a.

[0131] For example, Fig.14 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 of the first plug hole 510a, and part of the outer circumference of the first limit block 4351 also abuts against the inner wall of the first plug hole 510a.

[0132] It is understandable that the second limiting protrusion 512 may not be protruded from the hole wall surface of the second plug hole 510 b, but may be set on the outer peripheral surface of the second limiting block 4352 .

[0133] For example, Fig.15As shown, the outer circumference of the second limit block 4352 is also convexly provided with a plurality of second limit sub-protrusions 512, and the plurality of second limit sub-protrusions 512 abut against the hole wall surface of the second plug hole 510b. The plurality of second limit sub-protrusions 512 are divided into two parts, and the two parts of the second limit sub-protrusions 512 are respectively arranged on two oppositely arranged outer surfaces of the second limit block 4352; wherein the two outer surfaces are oppositely arranged along the axial direction of the winding drum 431 or perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50.

[0134] In one embodiment, the plurality of second limiting protrusions 512 are interference fit with the second insertion holes 510 b.

[0135] 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 arranged opposite to each other along the second direction D2, but the present invention is not limited thereto.

[0136] like Figure 6 , Fig.12 and Fig.16 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.

[0137] It should be noted that the limiting protrusion 436 can be protruded from the outer periphery of the first flange 432, or can be protruded from the outer periphery of the second flange 433. In other words, the insert block 435 and the limiting protrusion 436 are respectively protruded from the outer periphery of the first flange 432 and the outer periphery of the second flange 433. The following description will be made by taking the limiting protrusion 436 protruding from the second flange 433 as an example, but the description should not be limited to this.

[0138] 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.

[0139] Therefore, when assembling the circuit board 50 and the coil frame 43 of the relay of the embodiment of the present application, first align the opening of the circuit board 50 with the limiting protrusion 436, and pass the limiting protrusion 436 through the notch 520, and then rotate the circuit board 50 with the contact position between the circuit board 50 and the limiting protrusion 436 as the axis to insert the plug block 435 into the socket 510. At this point, the circuit board 50 and the coil frame 43 have completed the limiting assembly.

[0140] In one embodiment, the positions of the limiting protrusion 436 and the plug block 435 correspond in the axial direction (second direction D2) of the winding drum 431, so that the positions of the plug hole 510 and the notch 520 of the circuit board 50 correspond in the axial direction (second direction D2) of the winding drum 431.

[0141] 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 other of the first flange 432 and the second flange 433 and passes through the notch 520. The contact portion 4362 is connected to the end of the through portion 4361 and abuts against a side surface of the circuit board 50 facing away from the coil 44.

[0142] In the embodiment of the present application, the penetration 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 penetration portion 4361 away from the second flange 433 .

[0143] The abutting portion 4362 includes two barbs 4363 protruding from the outer peripheral surface of the through portion 4361. The two barbs 4363 are arranged opposite to each other in a direction perpendicular to the axial direction of the winding drum 431 and parallel to the circuit board 50, and respectively abut against a surface of the circuit board 50 on one side facing away from the coil 44. The circuit board 50 can be limited by the arrangement of the two barbs 4363.

[0144] 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 circuit board 50.

[0145] In one embodiment, the orthographic projection shape of the contact portion 4362 on 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.

[0146] like Fig.11 As shown, the insert block 435 has an inclined surface 4353 on one 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 .

[0147] 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 in contact with the wall surface of the hole 510 to guide the plug 435 to be accurately inserted into the hole 510.

[0148] In summary, the limit structure and relay of the embodiment of the present application have at least the following advantages and beneficial effects:

[0149] In the limiting structure of the embodiment of the present application, the first component and the second component are assembled in such a way that a protrusion is limited in the assembly hole, and a plurality of convex buds are provided between the outer peripheral surface of the corresponding protrusion and the hole wall surface of the assembly hole. The plurality of convex buds are arranged along the circumference of the assembly hole, so that the problem of assembly inconvenience or even inability to assemble due to the dispersion of the components can be solved by adjusting the position and / or number of the convex buds.

[0150] Furthermore, the two pairs of corresponding protrusions and the two groups of convex buds in the assembly hole are not symmetrically arranged about the perpendicular bisector of the line segment, which can effectively reduce the assembly accuracy requirements between the first component and the second component and solve the problem that the first component and / or the second component cannot be assembled due to manufacturing tolerances.

[0151] Furthermore, by providing a guide slope 2541 on the sub-protrusion 254 , when the yoke iron plate 25 and the coil frame 43 are assembled, the guide slope 2541 can guide the positioning protrusion 253 to be accurately inserted into the positioning hole 434 .

[0152] Furthermore, when the first component is the yoke plate 25 and the second component is the coil frame 43, the yoke plate 25 has a positioning protrusion 253, the coil frame 43 has a positioning hole 434, and the positioning protrusion 253 is limited in the positioning hole 434, thereby ensuring the assembly accuracy between the yoke plate 25 and the coil frame 43. In addition, since the positioning protrusion 253 is arranged on the yoke plate 25, the strength of the positioning protrusion 253 is stronger. When the relay is in a strong vibration environment, the positioning protrusion 253 is not easy to break, and in cooperation with the positioning hole 434, it can still maintain a reliable positioning effect, ensuring the assembly accuracy of the yoke plate 25 and the coil frame 43, thereby improving the working reliability of the entire relay product.

[0153] It is understandable that the various embodiments / implementations provided in the present application can be combined with each other without causing any contradiction, and will not be illustrated one by one here.

[0154] In the application embodiments, 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. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the application embodiments can be understood according to the specific circumstances.

[0155] In the description of the application embodiments, it should be understood that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the application embodiments and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the application embodiments.

[0156] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application embodiment. In this specification, the schematic representation of the above terms does 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.

[0157] The above are only preferred embodiments of the application embodiments and are not intended to limit the application embodiments. For those skilled in the art, the application embodiments may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application embodiments shall be included in the protection scope of the application embodiments.

Claims

1. A limiting structure, characterized in that: include: A first component having at least two protrusions; The second component has at least two assembly holes, and at least two of the protrusions are respectively confined within the at least two assembly holes; Wherein, a plurality of convex buds are provided between the outer peripheral surface of the corresponding protruding portion and the hole wall surface of the assembly hole, and the plurality of convex buds are arranged along the circumference of the assembly hole.

2. The limiting structure according to claim 1, characterized in that: Each of the convex buds is integrally protruded from one of the outer peripheral surface of the protruding portion and the hole wall surface of the assembly hole, and at least one group of corresponding convex buds between the protruding portion and the assembly hole abuts against the other of the outer peripheral surface of the protruding portion and the hole wall surface of the assembly hole.

3. The limiting structure according to claim 1, characterized in that: The number of the protrusions is two, the number of the assembly holes is two; a line segment is formed between the centers of the two assembly holes; The two pairs of corresponding protrusions and the two groups of convex bumps in the assembly hole are not symmetrically arranged about the perpendicular midline of the line segment.

4. The limiting structure according to claim 1, characterized in that: Each of the convex bulges has a guiding slope, and an included angle is formed between the guiding slope and the axis of the assembly hole. The guiding slope is used to guide the protrusion to be inserted into the assembly hole.

5. The limiting structure according to claim 1, characterized in that: The at least two protrusions include a first limit block and a second limit block, and the at least two assembly holes include a first plug hole and a second plug hole; In the first limiting direction and the second limiting direction, the first limiting block is limited in the first insertion hole; in the first limiting direction or the second limiting direction, the second limiting block is limited in the second insertion hole; Among them, a plurality of protrusions are provided between the outer circumferential surface of the first limiting block and the hole wall surface of the first plug hole, and between the outer circumferential surface of the second limiting block and the hole wall surface of the second plug hole; and the first limiting direction is perpendicular to the second limiting direction.

6. The limiting structure according to claim 5, characterized in that: A plurality of convex buds are convexly disposed on the wall surface of the second insertion hole, and the plurality of convex buds abut against the outer peripheral surface of the second limiting block; The plurality of convex buds are divided into two parts, and the two parts of the convex buds are respectively arranged on two oppositely disposed hole walls in the second insertion hole; wherein the two hole walls are oppositely disposed along the first limiting direction or the second limiting direction.

7. The limiting structure according to claim 5, characterized in that: A plurality of convex buds are convexly disposed on the outer peripheral surface of the second limit block, and the plurality of convex buds abut against the hole wall surface of the second plug hole; The plurality of convex buds are divided into two parts, and the two parts of the convex buds are respectively arranged on two oppositely disposed outer surfaces of the second limiting block; wherein the two outer surfaces are oppositely disposed along the first limiting direction or the second limiting direction.

8. The limiting structure according to claim 5, characterized in that: The first limit block and the second limit block are both provided with an inclined surface, which is inclined relative to the thickness direction of the second component and is used to guide the first limit block to be inserted into the first insertion hole and to guide the second limit block to be inserted into the second insertion hole.

9. The limiting structure according to claim 2, characterized in that: The other of the outer peripheral surface of the protrusion and the hole wall surface of the assembly hole is interference-fitted with the convex bud.

10. A relay, characterized in that: It comprises the limiting structure as described in any one of claims 1 to 9.

11. The relay according to claim 10, characterized in that: The first component is a yoke iron plate, and the second component is a coil frame.

12. The relay according to claim 10, characterized in that: The first component is a coil frame, and the second component is a circuit board.

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