Relay

Abstract

The utility model discloses a relay, which comprises a shell, a pair of static contacts and a yoke, and is characterized in that the shell is provided with a pair of first through holes; the pair of static contacts are respectively arranged in the pair of first through holes; the yoke is arranged in the shell and comprises a connecting plate and a side plate which are connected, and the side plate is provided with a protrusion making contact with the inner surface of the shell.

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 related art includes a housing, a pair of static contacts, a moving component, and a magnetic circuit. The moving component and the magnetic circuit are arranged in the housing. The magnetic circuit is used to drive the moving component to move so that the moving component contacts or separates from the pair of static contacts to close or disconnect the relay. In order to improve magnetic efficiency, a yoke is usually provided in the magnetic circuit in the related art. However, the thickness of the yoke in the related art is relatively thick, which leads to a high material cost and is not conducive to reducing costs. Utility Model Content

[0004] The embodiment of the present application provides a relay, which can improve the problem of high material cost of the yoke existing in the related art while ensuring the stability of the yoke.

[0005] The relay of the embodiment of the present application includes:

[0006] The housing has a pair of first through holes;

[0007] a pair of stationary contacts, wherein the pair of stationary contacts are respectively disposed in the pair of first through holes; and

[0008] A yoke is arranged in the shell, and the yoke includes a connecting plate and a side plate. The side plate is connected to the connecting plate and has a protrusion that contacts the inner surface of the shell.

[0009] According to some embodiments of the present application, it also includes:

[0010] A yoke plate, a pair of static contacts are located on one side of the yoke plate in the thickness direction, the yoke is located on the other side of the yoke plate in the thickness direction, and one end of the side plate away from the connecting plate is connected to the yoke plate.

[0011] According to some embodiments of the present application, it also includes:

[0012] The coil frame is arranged on the side of the yoke iron plate facing away from the static contact and is located in the space surrounded by the connecting plate and the side plate;

[0013] A moving iron core is movably disposed in the coil frame; and

[0014] The magnetic conductive cylinder is arranged in the coil frame and sleeved on the outer periphery of the moving iron core. The magnetic conductive cylinder contacts the connecting plate.

[0015] According to some embodiments of the present application, the connecting plate has a second through hole, and the second through hole penetrates the connecting plate along the thickness direction of the connecting plate;

[0016] A magnetic conductive portion is protruded from a surface of one side of the connecting plate facing the yoke iron plate. The magnetic conductive portion is arranged at an edge of the second through hole and contacts the outer circumferential surface or the inner circumferential surface of the magnetic conductive cylinder.

[0017] According to some embodiments of the present application, the magnetic conductive portion is an annular structure.

[0018] According to some embodiments of the present application, the magnetic conductive portion is a circular ring structure.

[0019] According to some embodiments of the present application, the magnetic conductive portion is in contact with the outer circumferential surface of the magnetic conductive cylinder, and the magnetic conductive cylinder is penetrated through the second through hole.

[0020] According to some embodiments of the present application, it also includes:

[0021] a stationary iron core located on the other side of the yoke plate in the thickness direction and fixedly connected to the yoke plate; the moving iron core located on the other side of the yoke plate in the thickness direction and arranged opposite to the stationary iron core along the thickness direction of the yoke plate; and

[0022] The second elastic member is located between the static iron core and the moving iron core, and is used for providing an elastic force to move the moving iron core away from the static iron core.

[0023] According to some embodiments of the present application, it also includes:

[0024] A metal cover is arranged on a side surface of the yoke iron plate facing away from the static contact and extends into the coil frame; the moving iron core is movably arranged in the metal cover, and the magnetic conductive cylinder is sleeved on the outer periphery of the metal cover.

[0025] According to some embodiments of the present application, the yoke plate has a first through hole, and the first through hole penetrates the yoke plate along the thickness direction of the yoke plate;

[0026] The relay also includes a moving contact piece, a push rod component, an auxiliary moving contact piece and an auxiliary lead-out terminal. The moving contact piece is used to contact or separate with a pair of stationary contacts. The push rod component is movably arranged in the first through hole to drive the moving contact piece to move. The auxiliary moving contact piece is connected to the push rod component to contact or separate with the auxiliary lead-out terminal.

[0027] According to some embodiments of the present application, the yoke includes two side plates, the two side plates are respectively connected to the two ends of the connecting plate along the first direction, and the surfaces of the two side plates facing away from each other along the first direction are provided with protrusions.

[0028] According to some embodiments of the present application, the surfaces of the two side panels facing each other are inner sides, and the inner side surfaces are provided with recesses at positions corresponding to the protrusions along the first direction, and the recesses are recessed from the inner side surfaces into the protrusions.

[0029] According to some embodiments of the present application, the protrusion is interference fit with the housing.

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

[0031] In the relay of the embodiment of the present application, the yoke side plate has a protrusion, which is in contact with the inner surface of the shell. Without changing the size of other parts of the relay, the thickness of the yoke can be reduced, thereby reducing material costs and avoiding the problem of relative shaking between the yoke and the shell, thereby improving the reliability of the relay operation.

[0032] Furthermore, the side plate has protrusions and recesses corresponding to the positions, so that the protrusions can be formed by stamping the side plate. The protrusions formed by the stamping process have the advantages of easy processing and high processing efficiency.

[0033] Furthermore, a magnetic conductive portion is provided on one side surface of the connecting plate facing the yoke iron plate, and the magnetic conductive portion is in contact with the magnetic conductive cylinder, thereby improving the magnetic efficiency. Therefore, it is possible to improve the stability of the push rod component by increasing the stiffness coefficient of the second elastic member, and ensure the matching of the suction and reaction force of the relay without increasing the power consumption of the coil.

[0034] Furthermore, the relay further comprises an auxiliary moving contact piece and an auxiliary lead-out terminal, wherein the auxiliary moving contact piece is connected to the push rod component. Since the stability of the push rod component is ensured, the shaking of the auxiliary moving contact piece caused by the shaking of the push rod component is avoided, thereby improving the reliability of auxiliary contact point monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Shown is a schematic diagram of a relay according to an embodiment of the present application at one viewing angle.

[0036] Figure 2 Shown is the Figure 1 Section view along the AA cutting line.

[0037] Figure 3 It shows Figure 1 The schematic diagram after the outer casing and insulating cover are omitted.

[0038] Figure 4 Shown is a schematic diagram of a yoke according to an embodiment of the present application.

[0039] The reference numerals are described as follows:

[0040] 10. housing; 11. outer cover; 111. first through hole; 12. base;

[0041] 21. Insulation cover; 211. Opening; 212. Inner cavity; 22. Static contact; 24. Frame; 25. Yoke iron plate; 251. First perforation; 26. Arc extinguishing assembly; 261. Yoke iron clamp; 262. Permanent magnet; 27. Metal cover;

[0042] 30. Moving assembly; 31. Moving contact piece; 32. First elastic member; 33. Push rod member;

[0043] 40, magnetic circuit portion; 41, moving iron core; 42, stationary iron core; 421, second through hole; 43, coil frame; 44, coil; 45, magnetic tube; 46, second elastic member; 47, yoke; 471, connecting plate; 472, side plate; 472a, inner side surface; 473, protrusion; 474, recess; 475, second through hole; 476, magnetic conductive portion;

[0044] D1, first direction; D2, second direction; D3, third direction. DETAILED DESCRIPTION

[0045] 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.

[0046] 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.

[0047] like Figure 1 and Figure 2 As shown, the relay of the embodiment of the present application includes a housing 10 , an insulating cover 21 , a yoke iron plate 25 , a pair of stationary contacts 22 , an arc extinguishing assembly 26 , a moving assembly 30 and a magnetic circuit portion 40 .

[0048] The housing 10 includes an outer cover 11 and a base 12 , which are connected to form a chamber for accommodating the yoke iron plate 25 , the arc extinguishing assembly 26 , the moving assembly 30 and the magnetic circuit part 40 .

[0049] It is understandable that the present application does not specifically limit the shapes of the outer cover 11 and the base 12. For example, in one embodiment, the outer cover 11 is a rectangular parallelepiped with an opening, and the base 12 is a plate-shaped base 12, which is buckled into the opening of the outer cover 11. The outer cover 11 and the base 12 can be connected by a snap-fit ​​method, but the invention is not limited thereto.

[0050] The insulating cover 21 has an inner cavity 212, a pair of static contacts 22 are installed on the top of the insulating cover 21, at least part of each static contact 22 extends into the inner cavity 212 of the insulating cover 21, and a static contact point is 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. One static contact 22 serves as a terminal for current to flow in, and the other static contact 22 serves as a terminal for current to flow out.

[0051] In the embodiment of the present application, two openings 211 are formed on the top of the insulating cover 21, and each opening 211 is connected to the inner cavity 212. A pair of static contacts 22 are respectively disposed in the two openings 211. Moreover, each static contact 22 and the insulating cover 21 can be connected by welding, but the present invention is not limited thereto.

[0052] The top of the outer cover 11 is provided with a first through hole 111 corresponding to the position of the opening 211 , the static contact 22 is provided in the first through hole 111 , and one end of the static contact 22 extends out of the outer surface of the outer cover 11 .

[0053] 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.

[0054] 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.

[0055] Please continue reading Figure 2 The moving assembly 30 includes a moving contact piece 31 , a first elastic member 32 and a push rod member 33 .

[0056] For the convenience of explanation, the arrangement direction of the pair of stationary contacts 22 is defined as the first direction D1, and the movement direction of the movable contact piece 31 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.

[0057] The movable contact piece 31 is disposed in the insulating cover 21 , and two ends of the movable contact piece 31 along the first direction D1 are respectively used to contact the bottom of a pair of stationary contacts 22 .

[0058] 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 .

[0059] The movable contact piece 31 is movably mounted on the portion of the push rod member 33 extending from the side surface of the yoke iron plate 25 facing the stationary contact 22. The first elastic member 32 is used to apply an elastic force to the movable contact piece 31 toward the stationary contact 22 to provide contact pressure.

[0060] As an example, the first elastic member 32 is a spring or a leaf spring, but is not limited thereto. In addition, the number of the first elastic member 32 may be one or more. When the number of the first elastic member 32 is multiple, the multiple first elastic members 32 may all be springs, or all be leaf springs, or may be a combination of leaf springs and springs, and the present application does not make any special limitation on this.

[0061] 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.

[0062] 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.

[0063] The static iron core 42 is disposed in the metal cover 27 and fixedly connected to the yoke iron plate 25, 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.

[0064] like Figure 2 As shown, the magnetic circuit part 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 powered off (the second elastic member 46 is used to provide an elastic force to move the moving iron core 41 away from the static iron core 42). At the same time, the elastic force of the second elastic member 46 can also hold the column push rod member 33 to prevent the push rod member 33 from shaking.

[0065] In one embodiment, the second elastic member 46 is a spring and is sleeved on the outer circumference of the push rod member 33 , but the present invention is not limited thereto.

[0066] 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 piece 31 contacts the stationary contact 22, the moving contact piece 31 is stopped by the stationary contact 22, and the push rod member 33 will continue to move upward until the overtravel is completed.

[0067] During the overtravel process, the first elastic member 32 is squeezed by the push rod member 33 and can provide elastic force to the movable contact piece 31 to provide contact point pressure.

[0068] 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 stationary contact 22 and the moving contact piece 31. Therefore, through the effect of the magnetic field, the arc generated between the stationary contact 22 and the moving contact 31 will be stretched in a direction away from each other, thereby achieving arc extinguishing.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] Please continue reading Figure 2 , the magnetic circuit part 40 also includes a yoke 47 and a magnetic tube 45. The yoke 47 includes a connecting plate 471 and two side plates 472, the two side plates 472 are respectively connected to the two ends of the connecting plate 471 along the first direction D1, and the two side plates 472 are arranged relatively along the first direction D1. Of course, in other embodiments, the two side plates 472 can also be arranged relatively along other directions. The connecting 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 plates 472 away from the connecting 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 yoke plate 25 and the connecting plate 471 and the two side plates 472 of the 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, and contacts with the yoke 47.

[0073] It can be seen that the yoke 47 of the embodiment of the present application is roughly formed into a U-shape. It is understandable that in other embodiments, the yoke 47 can also be cylindrical, that is, the connecting plate 471 is the bottom wall of the cylinder, and the side plate 472 is cylindrical and connected to the connecting plate 471.

[0074] like Figures 2 to 4 As shown, protrusions 473 are provided on surfaces of the two side plates 472 facing away from each other along the first direction D1 , and the protrusions 473 are in contact with the inner surface of the housing 10 .

[0075] In the relay of the embodiment of the present application, the two side plates 472 of the yoke 47 have protrusions 473, and the protrusions 473 can contact the inner surface of the housing 10. Without changing the size of other parts of the relay, the thickness of the yoke 47 can be reduced, thereby reducing the material cost and avoiding the problem of relative shaking between the yoke 47 and the housing 10, thereby improving the reliability of the relay operation.

[0076] It can be understood that, in one embodiment, the protrusion 473 contacts the inner surface of the outer cover 11; in another embodiment, the protrusion 473 contacts the inner surface of the base 12; in another embodiment, the protrusion 473 contacts the inner surface of the outer cover 11 and the inner surface of the base 12 at the same time.

[0077] As an example, the protrusion 473 is interference fit with the housing 10 to improve the reliability of the limiting connection between the protrusion 473 and the housing 10.

[0078] like Figure 4 As shown, the surfaces of the two side plates 472 facing each other are inner side surfaces 472a, and the inner side surface 472a of each side plate 472 faces the coil frame 43. The inner side surface 472a is provided with a recess 474 at a position corresponding to the protrusion 473 along the first direction D1, and the recess 474 is recessed from the inner side surface 472a into the protrusion 473.

[0079] In the embodiment of the present application, the side plate 472 has a protrusion 473 and a recess 474 with corresponding positions, so that the protrusion 473 can be formed by stamping the side plate 472. The protrusion 473 formed by the stamping process has the advantages of easy processing and high processing efficiency.

[0080] like Figure 2 and Figure 4 As shown, the connecting plate 471 has a second through hole 475 , and the second through hole 475 penetrates the connecting plate 471 along the thickness direction (second direction D2 ) of the connecting plate 471 . The magnetic conductive tube 45 is disposed in the second through hole 475 .

[0081] A magnetic conductive portion 476 is protruded from a surface of the connecting plate 471 facing the yoke plate 25 . The magnetic conductive portion 476 is disposed at an edge of the second through hole 475 , and is in contact with an outer circumference or an inner circumference of the magnetic conductive cylinder 45 .

[0082] It should be noted that when the relay is subjected to a large impact (for example, 50g, where g represents the acceleration of gravity), the elastic force provided by the second elastic member 46 is insufficient to maintain the stability of the push rod member 33, and the push rod member 33 is prone to shaking. In the related art, in order to solve the shaking problem of the push rod member 33, the stiffness coefficient of the second elastic member 46 is usually increased so that the second elastic member 46 can provide a larger elastic force to the moving iron core 41 and the push rod member 33, thereby improving the stability of the push rod member 33. However, as the stiffness coefficient of the second elastic member 46 increases, its initial elastic force will increase, resulting in the elastic force that needs to be overcome when the moving iron core 41 starts to move when the coil 44 is energized. Therefore, it is also necessary to increase the power consumption of the coil to overcome the elastic force of the second elastic member 46, which is not conducive to reducing the volume of the relay.

[0083] In the embodiment of the present application, a magnetic conductive portion 476 is provided on the surface of one side of the connecting plate 471 facing the yoke iron plate 25. The magnetic conductive portion 476 is in contact with the magnetic conductive cylinder 45, thereby improving the magnetic efficiency. Therefore, it is possible to increase the stiffness coefficient of the second elastic member 46 to improve the stability of the push rod assembly 33, and ensure the matching of the suction and reaction forces of the relay without increasing the power consumption of the coil.

[0084] like Figure 4 As shown, the magnetic conductive portion 476 is an annular structure. When the magnetic conductive portion 476 contacts the outer circumference of the magnetic conductive cylinder 45, the magnetic conductive portion 476 surrounds the outer circumference of the magnetic conductive cylinder 45. When the magnetic conductive portion 476 contacts the inner circumference of the magnetic conductive cylinder 45, the magnetic conductive cylinder 45 is sleeved on the outer circumference of the magnetic conductive portion 476.

[0085] Furthermore, the magnetic conductive portion 476 is a circular ring structure. Of course, in other embodiments, the ring formed by the magnetic conductive portion 476 can also be rectangular, elliptical, etc. Among them, when the magnetic conductive portion 476 is a ring structure, the specific shape of the ring structure can be determined according to the shape of the magnetic conductive cylinder 45.

[0086] It is understandable that, as a modified embodiment, the magnetic conductive portion 476 may not be an annular structure, but may include a plurality of small protrusions, wherein the plurality of small protrusions are arranged at intervals along the circumference of the magnetic conductive cylinder 45 , and each small protrusion is in contact with the magnetic conductive cylinder 45 .

[0087] like Figure 3 As shown, the relay further includes an auxiliary moving contact piece 81 and an auxiliary lead-out terminal 82. The auxiliary moving contact piece 81 is connected to the push rod member 33. The push rod member 33 is used to drive the auxiliary moving contact piece 81 to move so as to contact or separate from the auxiliary lead-out terminal 82. Through the contact or separation of the auxiliary moving contact piece 81 and the auxiliary lead-out terminal 82, the closed / open state of the contact between the moving contact piece 31 and the stationary contact 22 can be monitored.

[0088] It can be understood that, due to the limiting fit formed between the yoke 47 and the housing 10, the yoke plate 25, the moving component 30, and the auxiliary moving contact piece 81 can all be stably set in the housing 10, thereby avoiding the shaking of the auxiliary moving contact piece 81 due to the shaking of the moving component 30, thereby improving the reliability of auxiliary contact monitoring.

[0089] It can be understood that, in one embodiment, the relay includes an auxiliary moving contact piece 81 and an auxiliary lead-out terminal 82, and the auxiliary moving contact piece 81 is in contact with or separated from the auxiliary lead-out terminal 82 to monitor the closed state of the moving contact piece 31 and the static contact 22; in another embodiment, the relay includes an auxiliary moving contact piece 81 and two auxiliary lead-out terminals 82, and the auxiliary moving contact piece 81 is in contact with or separated from the two auxiliary lead-out terminals 82 to monitor the closed state of the moving contact piece 31 and the static contact 22, for example, the two ends of the auxiliary moving contact piece 81 in the length direction are respectively in contact with or separated from the two auxiliary lead-out terminals 82, or, when the moving contact piece 31 is in contact with the static contact 22, the auxiliary moving contact piece 81 is in contact with one of the auxiliary lead-out terminals 82; when the moving contact piece 31 is separated from the static contact 22, the auxiliary moving contact piece 81 is in contact with the other auxiliary lead-out terminal 82, and is separated from the auxiliary lead-out terminal 82 that was previously in contact.

[0090] It can be understood that the auxiliary moving contact piece 81 and the auxiliary lead-out terminal 82 can be designed as a normally open type, a normally closed type or a conversion type. When it is a normally open type, the relay is powered off, and the auxiliary moving contact piece 81 and the auxiliary lead-out terminal 82 are in a disconnected state; when the relay is powered on, the auxiliary moving contact piece 81 and the auxiliary lead-out terminal 82 are in a closed state; when it is a normally closed type, the relay is powered off, and the auxiliary moving contact piece 81 and the auxiliary lead-out terminal 82 are in a closed state; when the relay is powered on, the auxiliary moving contact piece 81 and the auxiliary lead-out terminal 82 are in a disconnected state; when it is a conversion type, the relay is powered off, the auxiliary moving contact piece 81 and one of the auxiliary lead-out terminals 82 are in a closed state, and the auxiliary lead-out terminal 82 is disconnected; when the relay is powered on, the auxiliary moving contact piece 81 and the other auxiliary lead-out terminal 82 are in a closed state, and the auxiliary lead-out terminal 82 that was previously in contact is disconnected.

[0091] In addition, the auxiliary lead-out terminal 82 may be fixedly disposed on the yoke iron plate 25 or may be fixedly disposed on the insulating cover 21 , and this application does not limit this.

[0092] In summary, the relay of the embodiment of the present application has at least the following advantages and beneficial effects:

[0093] In the relay of the embodiment of the present application, the side plate 472 of the yoke 47 has a protrusion 473, and the protrusion 473 can contact the inner surface of the housing 10. Without changing the size of other parts of the relay, the thickness of the yoke 47 can be reduced, thereby reducing the material cost and avoiding the problem of relative shaking between the yoke 47 and the housing 10, thereby improving the reliability of the relay operation.

[0094] Furthermore, the side plate 472 has a protrusion 473 and a recess 474 corresponding to each other, so that the protrusion 473 can be formed by stamping the side plate 472. The protrusion 473 formed by the stamping process has the advantages of easy processing and high processing efficiency.

[0095] Furthermore, a magnetic conductive portion 476 is provided on one side surface of the connecting plate 471 facing the yoke iron plate 25, and the magnetic conductive portion 476 is in contact with the magnetic conductive cylinder 45, thereby improving the magnetic efficiency. Therefore, it is possible to increase the stiffness coefficient of the second elastic member 46 to improve the stability of the push rod assembly 33, and ensure the matching of the suction and reaction forces of the relay without increasing the power consumption of the coil.

[0096] Furthermore, the relay further comprises an auxiliary moving contact piece 81 and an auxiliary lead-out terminal 82, wherein the auxiliary moving contact piece 81 is connected to the push rod member 33. Since the stability of the push rod member 33 is ensured, the shaking of the auxiliary moving contact piece 81 caused by the shaking of the push rod member 33 is avoided, thereby improving the reliability of the auxiliary contact point monitoring.

[0097] 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.

[0098] 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.

[0099] In the description of the application embodiments, it should be understood that the terms "up", "down", "left", "right", "front", "back", "top", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the application embodiments and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the application embodiments.

[0100] 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.

[0101] 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 housing has a pair of first through holes; a pair of stationary contacts, wherein the pair of stationary contacts are respectively disposed in the pair of first through holes; as well as A yoke is arranged in the shell, and the yoke includes a connecting plate and a side plate. The side plate is connected to the connecting plate and has a protrusion that contacts the inner surface of the shell.

2. The relay according to claim 1, characterized in that: Also includes: A yoke plate, a pair of static contacts are located on one side of the yoke plate in the thickness direction, the yoke is located on the other side of the yoke plate in the thickness direction, and one end of the side plate away from the connecting plate is connected to the yoke plate.

3. The relay according to claim 2, characterized in that: Also includes: The coil frame is arranged on the side of the yoke iron plate facing away from the static contact and is located in the space surrounded by the connecting plate and the side plate; A moving iron core is movably disposed in the coil frame; as well as The magnetic conductive cylinder is arranged in the coil frame and sleeved on the outer periphery of the moving iron core. The magnetic conductive cylinder contacts the connecting plate.

4. The relay according to claim 3, characterized in that: The connecting plate has a second through hole, and the second through hole penetrates the connecting plate along the thickness direction of the connecting plate; A magnetic conductive portion is protruded from a surface of one side of the connecting plate facing the yoke iron plate. The magnetic conductive portion is arranged at an edge of the second through hole and contacts the outer circumferential surface or the inner circumferential surface of the magnetic conductive cylinder.

5. The relay according to claim 4, characterized in that: The magnetic conductive part is an annular structure.

6. The relay according to claim 5, characterized in that: The magnetic conductive part is a circular ring structure.

7. The relay according to claim 4, characterized in that: The magnetic conductive portion contacts the outer circumferential surface of the magnetic conductive cylinder, and the magnetic conductive cylinder is penetrated through the second through hole.

8. The relay according to claim 4, characterized in that: Also includes: a stationary iron core located on the other side of the yoke plate in the thickness direction and fixedly connected to the yoke plate; the moving iron core located on the other side of the yoke plate in the thickness direction and arranged opposite to the stationary iron core along the thickness direction of the yoke plate; and The second elastic member is located between the static iron core and the moving iron core, and is used for providing an elastic force to move the moving iron core away from the static iron core.

9. The relay according to claim 3, characterized in that: Also includes: A metal cover is arranged on a side surface of the yoke iron plate facing away from the static contact and extends into the coil frame; the moving iron core is movably arranged in the metal cover, and the magnetic conductive cylinder is sleeved on the outer periphery of the metal cover.

10. The relay according to claim 2, characterized in that: The yoke plate has a first through hole, and the first through hole penetrates the yoke plate along the thickness direction of the yoke plate; The relay also includes a moving contact piece, a push rod component, an auxiliary moving contact piece and an auxiliary lead-out terminal. The moving contact piece is used to contact or separate with a pair of stationary contacts. The push rod component is movably arranged in the first through hole to drive the moving contact piece to move. The auxiliary moving contact piece is connected to the push rod component to contact or separate with the auxiliary lead-out terminal.

11. The relay according to claim 1, characterized in that: The yoke includes two side plates, which are respectively connected to two ends of the connecting plate along a first direction, and surfaces of the two side plates facing away from each other along the first direction are provided with protrusions.

12. The relay according to claim 11, characterized in that: The surfaces of the two side plates facing each other are inner side surfaces, and a concave portion is provided on the inner side surface at a position corresponding to the protrusion along the first direction, and the concave portion is sunken from the inner side surface into the protrusion.

13. The relay according to claim 1, characterized in that: The protrusion is interference fit with the housing.

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