Relay

Abstract

The utility model discloses a relay which comprises a yoke plate and a coil rack. The yoke iron plate comprises a plate body and a positioning protrusion, and the positioning protrusion is arranged on the surface of one side of the plate body in the thickness direction in a protruding mode. The coil frame is arranged on one side, convexly provided with the positioning bulge, of the plate body; the coil rack is provided with a positioning hole, and the positioning projection is limited in the positioning hole, thereby guaranteeing the assembly precision between the yoke plate and the coil rack. Besides, the positioning protrusions are arranged on the yoke plate, so that the strength of the positioning protrusions is higher, when the relay is in a strong vibration environment, the positioning protrusions are not prone to breakage, the reliable positioning effect can still be kept under the cooperation of the positioning protrusions and the positioning holes, the assembly precision of the yoke plate and the coil frame is ensured, and the service life of the relay is prolonged. And the working reliability of the whole relay product is improved.

Description

Technical Field

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

[0002] A relay is an electronic control device 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] A high-voltage DC relay is a type of relay. A high-voltage DC relay in the prior art includes an insulating cover, a pair of static contacts, a moving assembly, a yoke plate, a magnetic circuit portion, and the like. The insulating cover is located on one side of the yoke plate in the thickness direction, a pair of static contacts are mounted on the top of the insulating cover, and the moving assembly is movably arranged on the yoke plate to make the moving contact included in the moving assembly contact or separate from the bottom of the pair of static contacts. The magnetic circuit portion is located on the other side of the yoke plate in the thickness direction, and is used to drive the moving assembly to move. The magnetic circuit portion includes a coil frame and a coil, the coil is arranged on the side of the yoke plate facing away from the insulating cover, and the coil is wound around the outer periphery of the coil frame.

[0004] In the prior art, when the relay is in a strong vibration environment, the coil frame and the yoke iron plate are easily misaligned, which affects the assembly accuracy of the yoke iron plate and the coil frame, and further affects the reliability of the relay. Utility Model Content

[0005] The embodiment of the present application provides a relay capable of improving the assembly accuracy between a yoke plate and a coil frame, so as to improve the problem in the prior art that the assembly accuracy between the yoke plate and the coil frame is not high and thus affects the working reliability of the relay.

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

[0007] A yoke iron plate, comprising a plate body and a positioning protrusion, wherein the positioning protrusion is protrudingly provided on one side surface of the plate body in a thickness direction; and

[0008] The coil frame is arranged on one side of the plate body on which the positioning protrusion is protruding; the coil frame has a positioning hole, and the positioning protrusion is limited to be located in the positioning hole.

[0009] According to some embodiments of the present application, a plurality of sub-protrusions are provided between the outer peripheral surface of the positioning protrusion and the hole wall surface of the positioning hole, and the plurality of sub-protrusions are arranged along the circumference of the positioning hole.

[0010] According to some embodiments of the present application, a plurality of sub-protrusions are convexly provided on the hole wall surface of the positioning hole, and the plurality of sub-protrusions abut against the outer peripheral surface of the positioning protrusion.

[0011] According to some embodiments of the present application, each of the sub-protrusions has a guiding slope, and an angle is formed between the guiding slope and the axis of the positioning hole, and the guiding slope is used to guide the positioning protrusion to be inserted into the positioning hole.

[0012] According to some embodiments of the present application, the coil frame has two positioning holes, a line segment is formed between the centers of the two positioning holes, and the line segment has a perpendicular midline parallel to the plate body;

[0013] The arrangement of the plurality of sub-protrusions in the two positioning holes is not symmetrical about the perpendicular midline.

[0014] According to some embodiments of the present application, the positioning protrusion is interference fit with the plurality of sub-protrusions.

[0015] According to some embodiments of the present application, a plurality of sub-protrusions are convexly provided on the outer peripheral surface of the positioning protrusion, and the plurality of sub-protrusions abut against the inner wall surface of the positioning hole.

[0016] According to some embodiments of the present application, the yoke iron plate includes two positioning protrusions, a line segment is formed between the centers of the two positioning protrusions, and the line segment has a perpendicular midline parallel to the plate body;

[0017] The arrangement direction of the plurality of sub-protrusions on the peripheries of the two positioning protrusions is not symmetrical with respect to the perpendicular midline.

[0018] According to some embodiments of the present application, the plurality of sub-protrusions are interference fit with the positioning holes.

[0019] According to some embodiments of the present application, the yoke iron plate includes a plurality of the positioning protrusions, the coil frame has a plurality of the positioning holes, and the plurality of the positioning protrusions are respectively limited in the plurality of the positioning holes;

[0020] Each of the sub-protrusions between the corresponding positioning protrusion and the positioning hole is integrally protruded on one of the outer peripheral surface of the positioning protrusion and the hole wall surface of the positioning hole, and at least one group of the corresponding plurality of sub-protrusions between the positioning protrusion and the positioning hole abuts against the other of the outer peripheral surface of the positioning protrusion and the hole wall surface of the positioning hole.

[0021] According to some embodiments of the present application, the relay further includes a base and a U-shaped yoke, and the U-shaped yoke includes:

[0022] A bottom yoke plate, arranged on a side of the coil frame facing away from the yoke iron plate;

[0023] Two side yoke plates, one end of each of the two side yoke plates is connected to the two ends of the bottom yoke plate in the length direction, and the other ends of each of the two side yoke plates is connected to the two ends of the yoke plate in the length direction; wherein the coil frame is accommodated in a space surrounded by the bottom yoke plate, the two side yoke plates and the yoke plate;

[0024] Among them, the base is bonded to the side surface of the bottom yoke plate facing away from the yoke iron plate, the bottom yoke plate has a glue hole, and the base is provided with a protrusion on the side surface facing the bottom yoke plate, the protrusion is inserted into the glue hole, and a glue layer is filled between the protrusion and the wall surface of the glue hole.

[0025] According to some embodiments of the present application, the yoke plate is made of a metal material, and the coil frame is made of an insulating material.

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

[0027] In the relay of the embodiment of the present application, the yoke plate has a positioning protrusion, the coil frame has a positioning hole, and 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.

[0028] Furthermore, the arrangement directions of the sub-protrusions in the two positioning holes are staggered. Such an arrangement can effectively reduce the assembly accuracy requirements between the yoke plate and the coil frame, and solve the problem that the two cannot be assembled due to manufacturing tolerances of the yoke plate and / or the coil frame.

[0029] Furthermore, the bottom yoke plate has a glue hole, and the base has a protrusion inserted into the glue hole. The glue can penetrate between the protrusion and the wall of the glue hole to form a glue layer, thereby increasing the bonding area of ​​the glue, thereby further improving the connection strength between the base and the U-shaped yoke iron. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic top view of a relay according to an exemplary embodiment.

[0031] Figure 2 is along Figure 1 Section view along the AA cutting line.

[0032] Figure 3is 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.

[0033] Figure 4 is along Figure 3 Section view along the BB cutting line.

[0034] Figure 5 Schematic diagram of a yoke iron plate according to an embodiment of the present application.

[0035] Figure 6 It is a three-dimensional schematic diagram of a coil frame according to an embodiment of the present application.

[0036] Figure 7 It is a schematic top view of a coil frame according to an embodiment of the present application.

[0037] Figure 8 It is a schematic diagram of a yoke iron plate according to another embodiment of the present application.

[0038] The reference numerals are described as follows:

[0039] 11. Shell

[0040] 111. Opening

[0041] 12. Base

[0042] 121. Protrusion

[0043] 21. Insulation cover

[0044] 211. Mounting hole

[0045] 22. Stationary contact

[0046] 24. Frame

[0047] 25. Yoke iron plate

[0048] 251. First Perforation

[0049] 252. Board body

[0050] 253. Positioning protrusion

[0051] 254, sub-protrusion

[0052] 2541、Guide Incline

[0053] 26. Arc extinguishing part

[0054] 261, Yoke clamp

[0055] 262.Permanent magnet

[0056] 27. Metal cover

[0057] 30. Dynamic components

[0058] 31. Moving contact

[0059] 32. First elastic member

[0060] 33. Push rod components

[0061] 40. Magnetic circuit

[0062] 41. Moving iron core

[0063] 42. Static iron core

[0064] 421, Second Perforation

[0065] 43. Coil frame

[0066] 431. Bobbin

[0067] 432, first flange

[0068] 433, second flange

[0069] 434, positioning hole

[0070] 44. Coil

[0071] 45. Magnetic cylinder

[0072] 46. ​​Second elastic member

[0073] 47. U-shaped yoke

[0074] 471, bottom yoke plate

[0075] 4711、Glue hole

[0076] 472, side yoke plate

[0077] D1, first direction

[0078] D2, Second Direction

[0079] D3. Third direction DETAILED DESCRIPTION

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] In one embodiment, the housing 11 and the base 12 are both made of insulating materials, such as plastic, but not limited thereto.

[0087] like Figure 2 As 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.

[0088] 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.

[0089] 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.

[0090] 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, also 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.

[0091] 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.

[0092] 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.

[0093] 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 .

[0094] 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.

[0095] 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 .

[0096] 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.

[0097] 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.

[0098] 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 .

[0099] 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.

[0100] As an example, the first elastic member 32 is a spring, but is not limited thereto.

[0101] 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.

[0102] Please continue reading Figure 2 The 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.

[0103] 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.

[0104] 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.

[0105] In one embodiment, the second elastic member 46 is a spring, and is sleeved on the outer circumference of the push rod member 33 .

[0106] 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.

[0107] 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.

[0108] like Figure 2 As 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.

[0109] Continue reading Figure 2The 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.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] like Figure 3 and Figure 4As 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 of the plate body 252 where the positioning protrusion 253 is protrudingly provided; the coil frame 43 has a positioning hole 434, and the positioning protrusion 253 is limited in the positioning hole 434.

[0117] 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.

[0118] 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.

[0119] It should be noted that the yoke iron plate 25 may include one or more positioning protrusions 253 , and the coil frame 43 may include one or more positioning holes 434 . The number of the positioning protrusions 253 corresponds to the number of the positioning holes 434 .

[0120] When the number of the positioning protrusion 253 and the number of the positioning hole 434 are both one, the cross-sectional shape of the positioning protrusion 253 is non-circular, such as rectangular, elliptical, triangular, etc., and the shape of the positioning hole 434 is adapted to the cross-sectional shape of the positioning protrusion 253 .

[0121] When there are multiple positioning protrusions 253 and positioning holes 434, the cross-sectional shape of the positioning protrusion 253 can be circular or non-circular, and the shape of the positioning hole 434 matches the cross-sectional shape of the positioning protrusion 253. Multiple positioning holes 434 can limit the relative rotation of the yoke iron plate 25 and the coil frame 43.

[0122] 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.

[0123] like Figure 6As 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.

[0124] 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.

[0125] like Figure 7 As shown, a plurality of sub-protrusions 254 are further provided between the outer circumference of the positioning protrusion 253 and the hole wall surface of the positioning hole 434. In the embodiment of the present application, a plurality of sub-protrusions 254 are provided on the hole wall surface of the positioning hole 434, 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 circumference of the positioning protrusion 253.

[0126] It should be noted that the sub-protrusions 254 in the multiple positioning holes 434 can all abut against the outer peripheral surface of the positioning protrusion 253, or: the sub-protrusions 254 in some of the 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 can 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.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] The number of the sub-protrusions 254 in one positioning hole 434 may be two, three, four or other numbers. The sub-protrusions 254 may be arranged uniformly or non-uniformly along the circumference of the positioning hole 434 .

[0131] In one embodiment, the positioning protrusion 253 is interference fit with the plurality of sub-protrusions 254 .

[0132] Of course, in other embodiments, the sub-protrusion 254 may not be provided in the positioning hole 434 , but the positioning protrusion 253 is inserted into the positioning hole 434 , and the positioning protrusion 253 and the positioning hole 434 are interference fit or clearance fit.

[0133] 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 .

[0134] An example in which three sub-protrusions 254 are provided in a positioning hole 434 is used for description. Figure 7 The 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.

[0135] 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.

[0136] 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 .

[0137] like Figure 8As shown, specifically, the outer circumferential surface of the positioning protrusion 253 is further provided with a plurality of sub-protrusions 254, 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 may be: the sub-protrusions 254 of some positioning protrusions 253 abut against the inner wall surface of the positioning hole 434, and the sub-protrusions 254 of the remaining 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.

[0138] In one embodiment, the positioning holes 434 are interference fit with the plurality of sub-protrusions 254 .

[0139] Of course, in other embodiments, the sub-protrusion 254 may not be provided in the positioning hole 434 , but the positioning protrusion 253 is inserted into the positioning hole 434 , and the positioning protrusion 253 and the positioning hole 434 are interference fit or clearance fit.

[0140] 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.

[0141] 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.

[0142] The relay of the embodiment of the present application has at least the following advantages and beneficial effects:

[0143] 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 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.

[0144] Furthermore, the arrangement directions of the sub-protrusions 254 in the two positioning holes 434 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.

[0145] Furthermore, through the glue dispensing process, the base 12 is bonded to the side surface of the bottom yoke plate 471 facing away from the yoke plate 25, thereby improving the connection reliability between the base 12 and the U-shaped yoke 47. 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.

[0146] 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.

[0147] 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.

[0148] 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.

[0149] 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.

[0150] 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 relay, characterized in that: include: The yoke iron plate comprises a plate body and a positioning protrusion, wherein the positioning protrusion is protrudingly arranged on one side surface of the plate body in the thickness direction; as well as The coil frame is arranged on one side of the plate body on which the positioning protrusion is protruding; the coil frame has a positioning hole, and the positioning protrusion is limited to be located in the positioning hole.

2. The relay according to claim 1, characterized in that: A plurality of sub-protrusions are provided between the outer peripheral surface of the positioning protrusion and the hole wall surface of the positioning hole, and the plurality of sub-protrusions are arranged along the circumference of the positioning hole.

3. The relay according to claim 2, characterized in that: A plurality of sub-protrusions are convexly disposed on the hole wall surface of the positioning hole, and the plurality of sub-protrusions abut against the outer peripheral surface of the positioning protrusion.

4. The relay according to claim 3, characterized in that: Each of the sub-protrusions has a guiding slope, and an angle is formed between the guiding slope and the axis of the positioning hole. The guiding slope is used to guide the positioning protrusion to be inserted into the positioning hole.

5. The relay according to claim 3, characterized in that: The coil frame has two positioning holes, a line segment is formed between the centers of the two positioning holes, and the line segment has a perpendicular midline parallel to the plate body; The arrangement of the plurality of sub-protrusions in the two positioning holes is not symmetrical about the perpendicular midline.

6. The relay according to claim 3, characterized in that: The positioning protrusion is interference-fitted with the plurality of sub-protrusions.

7. The relay according to claim 2, characterized in that: A plurality of sub-protrusions are convexly disposed on the outer peripheral surface of the positioning protrusion, and the plurality of sub-protrusions abut against the inner wall surface of the positioning hole.

8. The relay according to claim 7, characterized in that: The yoke iron plate includes two positioning protrusions, a line segment is formed between the centers of the two positioning protrusions, and the line segment has a perpendicular midline parallel to the plate body; The arrangement direction of the plurality of sub-protrusions on the peripheries of the two positioning protrusions is not symmetrical with respect to the perpendicular midline.

9. The relay according to claim 7, characterized in that: The plurality of sub-protrusions are interference fit with the positioning holes.

10. The relay according to claim 2, characterized in that: The yoke iron plate includes a plurality of the positioning protrusions, the coil frame has a plurality of the positioning holes, and the plurality of the positioning protrusions are respectively limited in the plurality of the positioning holes; Each of the sub-protrusions between the corresponding positioning protrusion and the positioning hole is integrally protruded on one of the outer peripheral surface of the positioning protrusion and the hole wall surface of the positioning hole, and at least one group of the corresponding plurality of sub-protrusions between the positioning protrusion and the positioning hole abuts against the other of the outer peripheral surface of the positioning protrusion and the hole wall surface of the positioning hole.

11. The relay according to any one of claims 1 to 10, characterized in that: The relay further comprises a base and a U-shaped yoke, wherein the U-shaped yoke comprises: A bottom yoke plate, arranged on a side of the coil frame facing away from the yoke iron plate; Two side yoke plates, one end of each of the two side yoke plates is connected to the two ends of the bottom yoke plate in the length direction, and the other ends of each of the two side yoke plates is connected to the two ends of the yoke plate in the length direction; wherein the coil frame is accommodated in a space surrounded by the bottom yoke plate, the two side yoke plates and the yoke plate; Among them, the base is bonded to the side surface of the bottom yoke plate facing away from the yoke iron plate, the bottom yoke plate has a glue hole, and the base is provided with a protrusion on the side surface facing the bottom yoke plate, the protrusion is inserted into the glue hole, and a glue layer is filled between the protrusion and the wall surface of the glue hole.

12. The relay according to any one of claims 1 to 10, characterized in that: The yoke iron plate is made of metal material, and the coil frame is made of insulating material.

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