Relay

Abstract

The utility model relates to a relay which comprises a cup body, a coil rack, a static contact module and a movable contact module, the movable contact module movably penetrates through the coil rack, the cup body is provided with a containing cavity with an opening in one end, the coil rack is arranged in the containing cavity and wound with a coil, and one of the bottom end of the coil rack and the bottom wall of the containing cavity is provided with a plurality of first convex hulls. The other one is provided with a first groove, the first convex hulls are limited in the first groove, the static contact module is arranged on the coil rack and seals the opening of the containing cavity, one of one end of the static contact module and the top end of the coil rack is provided with a plurality of second convex hulls, the other one is provided with a second groove, and the second convex hulls are limited in the second groove. Therefore, the freedom degrees between the coil rack and the cup body and between the coil rack and the static contact module in the axial direction and the radial direction are limited, and the situation that mechanical parameters of the relay are affected due to the fact that the coil rack and the static contact module are prone to deflection in the assembling process is avoided.

Description

Technical Field

[0001] This application relates to the field of electronic control device technology, and in particular to a relay. Background Technology

[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 commonly used in automatic control circuits. Its principle is actually to use a smaller current to control a larger current, thus acting as an "automatic switch". Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in the circuit, and is widely used in fields such as new energy vehicles.

[0003] The internal electrical components of common relay products generally consist of a stationary contact module, a moving contact module, and a coil frame with a coil wound around it. These three parts are assembled and pressed into an iron cup. When the relay is working, the moving contact of the moving contact module moves to contact or disengage from the contact of the stationary contact module to control the power supply and the circuit connection of the load. However, in actual assembly, due to the unavoidable gaps between the three parts and the inner wall of the iron cup, and the lack of axial and radial positioning, misalignment can easily occur during assembly, affecting the mechanical parameters of the relay. Utility Model Content

[0004] Therefore, it is necessary to provide a relay that can solve the problem of misalignment caused by the lack of axial and radial positioning of internal electrical components during the assembly process of existing relays.

[0005] According to one aspect of this application, a relay is provided, comprising:

[0006] The cup body has a receiving cavity that is open at one end;

[0007] A coil frame is disposed in the receiving cavity and a coil is wound thereon. One of the bottom end of the coil frame and the bottom wall of the receiving cavity has a plurality of first protrusions, and the other has a first groove. The first protrusions are confined within the first groove.

[0008] A static contact module is disposed on the coil frame and closes the opening of the receiving cavity. One end of the static contact module and one end of the top of the coil frame have multiple second protrusions, and the other end has a second groove. The second protrusions are confined in the second groove. The static contact module has a first contact for connecting to the load power supply and a second contact for connecting to the load.

[0009] A movable contact module is movably mounted on the coil frame. The movable contact module has a conducting state that abuts against the first contact and the second contact, and a disconnecting state that is disconnected from the first contact and the second contact. The conducting state or the disconnecting state is switched as the coil is energized or de-energized.

[0010] In one embodiment, all the first convex bulges are spaced apart around the central axis of the cup body, and the first grooves are annularly surrounding the central axis of the cup body;

[0011] And / or, all the second convex circumferential ...

[0012] In one embodiment, the sidewall of the first convex bulge is interference-fitted with the sidewall of the first groove.

[0013] In one embodiment, the first convex bulge is interference-fitted with one side wall of the first groove near the central axis of the cup body, and clearance-fitted with the other side wall of the first groove away from the central axis of the cup body;

[0014] Alternatively, the first convex bulge may be clearance-fitted with one side wall of the first groove near the central axis of the cup body, and interference-fitted with the other side wall of the first groove away from the central axis of the cup body.

[0015] In one embodiment, the sidewall of the second convex bulge is interference-fitted with the sidewall of the second groove.

[0016] In one embodiment, the second convex bulge is interference-fitted with one side wall of the second groove near the central axis of the cup body, and clearance-fitted with the other side wall of the second groove away from the central axis of the cup body;

[0017] Alternatively, the second convex bulge may be clearance-fitted with one side wall of the second groove near the central axis of the cup body, and interference-fitted with the other side wall of the second groove away from the central axis of the cup body.

[0018] In one embodiment, the static contact module includes:

[0019] A support assembly is fitted to the side wall of the receiving cavity. The first contact and the second contact are connected to the support assembly and partially extend into the support assembly. A magnet is provided inside the support assembly.

[0020] A magnetic sheet is attached to the top of the coil frame on one side and attracted to the support assembly by the magnet on the other side. A second protrusion is provided on one of the magnetic sheet and the coil frame, and a second groove is formed on the other of the magnetic sheet and the coil frame.

[0021] In one embodiment, the support assembly includes a support base and a guide base. The first contact and the second contact are disposed at one end of the support base, and the guide base is connected to the opposite end of the support base. The magnetic sheet is attached to the side of the guide base away from the support base. One of the guide base and the magnetic sheet is provided with a plurality of third protrusions, and the other is provided with a plurality of positioning holes. The third protrusions are confined in a corresponding positioning hole.

[0022] In one embodiment, the sidewall of the third convex bulge is interference-fitted with the wall of the positioning hole.

[0023] In one embodiment, the relay further includes a housing with an opening at one end, and the cup is disposed inside the housing; the outer wall of the cup, the inner wall of the housing, and a portion of the surface of the static contact module are formed with a potting groove, the potting groove being filled with sealant, and the sealant sealing the opening of the housing.

[0024] The aforementioned relay has multiple first protrusions on one of the bottom end of the coil frame and the bottom wall of the cup-shaped cavity, and a first groove on the other, with the first protrusions confined within the first groove. Similarly, multiple second protrusions are provided on one of the ends of the stationary contact module and the top end of the coil frame, and a second groove is provided on the other, with the second protrusions confined within the second groove. This restricts the axial and radial degrees of freedom between the coil frame and the cup, and between the coil frame and the stationary contact module, preventing mutual movement in the axial and radial directions. Therefore, it avoids the coil frame and stationary contact module from easily becoming misaligned during assembly, which could affect the mechanical parameters of the relay. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the appearance of a relay provided in one embodiment of this application.

[0026] Figure 2 An exploded view of a relay provided in an embodiment of this application. Figure 1 .

[0027] Figure 3 An exploded view of a relay provided in an embodiment of this application. Figure 2 .

[0028] Figure 4 A cross-sectional view of a relay provided in an embodiment of this application.

[0029] Figure 5 A partial structural cross-section of a relay provided in an embodiment of this application. Figure 1 .

[0030] Figure 6 A partial structural cross-section of a relay provided in an embodiment of this application. Figure 2 .

[0031] Figure 7 This is a schematic diagram of the structure of the magnetic sheet in a relay provided in an embodiment of this application.

[0032] Figure 8 A schematic diagram of the coil frame structure in a relay provided in an embodiment of this application. Figure 1 .

[0033] Figure 9 A schematic diagram of the structure of the cup body in a relay provided in an embodiment of this application. Figure 1 .

[0034] Figure 10 A schematic diagram of the coil frame structure in a relay provided in an embodiment of this application. Figure 2 .

[0035] Figure 11 This is an exploded view of the stationary contact module in a relay provided in an embodiment of this application.

[0036] Figure 12 A schematic diagram of the static contact module in a relay provided in an embodiment of this application. Figure 1 .

[0037] Figure 13 A schematic diagram of the static contact module in a relay provided in an embodiment of this application. Figure 2 .

[0038] Explanation of reference numerals in the attached figures:

[0039] 10. Relay; 11. Potting tank; 12. Glue leakage tank; 12a. Glue guide groove; 12b. Glue storage position; 100. Housing; 200. Cup body; 201. Second convex bulge; 300. Coil frame; 301. First groove; 302. Second groove; 400. Static contact module; 410. First contact; 420. Second contact; 430. Support assembly; 431. Support base; 4311. Annular groove; 432. Guide seat; 4321. Guide part; 4322. Third convex bulge; 4323. Flange; 440, Magnet; 450, Magnetic sheet; 451, First convex bulge; 452, Positioning hole; 500, Moving contact module; 510, Push rod; 510a, Stepped surface; 520, Moving contact piece; 530, Iron core; 540, Elastic element; 550, Snap ring; 560, Support sleeve; 600, Coil; 700, Sealant; 800, Conductive component; 810, Terminal block; 820, Conductive sheet; 900, Fixing ring; 901, Glue inlet; 902, Through hole; 1000, Air tube. Detailed Implementation

[0040] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0041] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0042] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0044] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0046] This application provides a relay that is used in an automatic control circuit. The relay plays a role in automatic adjustment, safety protection, and circuit switching. For example, it can be used to connect the load power supply and the load, and control the on / off state of the circuit between the load power supply and the load. This allows the relay to protect the load through circuit switching and automatic adjustment, preventing damage to the load due to excessive current.

[0047] The following description uses a high-voltage DC relay used in an electric vehicle charging station as an example to illustrate the structure of the relay provided in this application. It is understood that the relay provided in this application can be any type of relay used in other fields, and is not limited to a high-voltage DC relay used in electric vehicle charging stations; there are no particular limitations in this regard.

[0048] See Figures 1 to 4 , Figure 1A schematic diagram of the appearance of a relay 10 according to an embodiment of this application is shown. Figure 2 and Figure 3 An exploded schematic diagram of the relay 10 is shown. Figure 4 A cross-sectional view of the internal structure of the relay 10 is shown. An embodiment of the relay 10 provided in this application includes a housing 100, a cup 200, a coil frame 300, a stationary contact module 400, and a moving contact module 500. One end of the housing 100 is open. The cup 200 is disposed within the housing 100 and has a receiving cavity with one open end. The coil frame 300 is disposed within the receiving cavity and has a coil 600 wound around it. The stationary contact module 400 is fixedly disposed on the coil frame 300 and closes the opening of the receiving cavity. It has a first contact 410 for connecting to a load power supply and a second contact 420 for connecting to a load (e.g., an automobile). The moving contact module 500 is movably disposed within the coil frame 300. The moving contact module 500 has a conducting state abutting against the first contact 410 and the second contact 420, and a disconnected state disengaging from the first contact 410 and the second contact 420. The conducting or disconnected state is switched as the coil 600 is energized or de-energized.

[0049] In some embodiments, when the coil 600 is energized, the coil 600 generates a magnetic field, and the moving contact module 500 is driven by magnetic force in the magnetic field and abuts against the first contact 410 and the second contact 420, so that the load power supply connected to the first contact 410 and the load connected to the second contact 420 are electrically connected to each other; or when the coil 600 is de-energized, the moving contact module 500 is reset and disengaged from the first contact 410 and the second contact 420, thereby realizing the disconnection of the circuit controlling the load power supply and the load.

[0050] In some other embodiments, when the coil 600 is de-energized, the moving contact module 500 can abut against the first contact 410 and the second contact 420 under the elastic force provided by the elastic element, so that the load power supply connected to the first contact 410 and the load connected to the second contact 420 are electrically connected to each other. When the coil 600 is energized, the coil 600 generates a magnetic field, and the moving contact module 500 is driven by magnetic force in the magnetic field to overcome the elastic force of the elastic element and disengage from the first contact 410 and the second contact 420, thereby realizing the disconnection of the circuit controlling the load power supply and the load.

[0051] In one embodiment, such as Figure 2 and Figure 3As shown, the inner wall of the outer casing 100, the outer wall of the cup body 200, and part of the outer surface of the static contact module 400 are formed with a potting groove 11. The potting groove 11 is filled with sealant 700, which seals the opening of the outer casing 100, thereby sealing the cup body 200, the static contact module 400, and the dynamic contact module 500 in the outer casing 100. This prevents dust, moisture, and other contaminants from entering the inside of the relay 10, thus protecting the electronic components and contacts inside the relay 10 and preventing the high temperature generated by the electric arc from corroding the contacts.

[0052] In terms of the structure of the static contact module 400, the static contact module 400 has a cylindrical structure, which includes a support component 430 and a magnetic sheet 450. The support component 430 is attached to the side wall of the receiving cavity of the cup body 200. The first contact 410 and the second contact 420 are connected to the support component 430 and partially extend into the support component 430. A magnet 440 is provided inside the support component 430. One side of the magnetic sheet 450 is attached to the top of the coil frame 300, and the other side is attracted by the magnet 440 to be attached to the support component 430.

[0053] Specifically, the support assembly 430 includes a support base 431 and a guide seat 432. The outer wall of the support base 431 is fitted to the inner wall of the cup body 200. The first contact 410 and the second contact 420 are mounted on one end of the support base 431 along its own axial direction and partially extend into the inner cavity of the support base 431. The guide seat 432 connects to the support base 431 and closes the inner cavity opening of the support base 431. The side of the magnetic sheet 450 facing away from the coil frame 300 is attracted and attached to the side of the guide seat 432 facing away from the support base 431 by the magnet 440. The guide seat 432 has two guide portions 4321 arranged radially apart. Each guide portion 4321 is used to contact the inner wall of the support base 431 when the support base 431 and the guide seat 432 are connected, thereby providing guidance and preventing the support base 431 from failing to connect smoothly with the guide seat 432 in one go.

[0054] The purpose of setting up the magnet 440 and the magnetic sheet 450 is that when the first contact 410 is connected to a load power supply and the second load is connected to a load and electrically conducting, an electric repulsive force will be generated between the first contact 410 and the second contact 420 due to the energization, preventing the moving contact module 500 from contacting the first contact 410 and the second contact 420. Therefore, by setting up the magnet 440 and the magnetic sheet 450, when the moving contact module 500 contacts the first contact 410 and the second contact 420, the magnetic sheet 450 can attract the moving contact module 500, preventing the moving contact module 500 from separating from the first contact 410 and the second contact 420 when the first contact 410 and the second contact 420 are energized, thereby overcoming the influence of the electric repulsive force on the moving contact module 500 contacting the first contact 410 and the second contact 420.

[0055] In the structure of the dynamic contact module 500, such as Figure 4 As shown, in one embodiment, the moving contact module 500 includes a push rod 510, a moving contact piece 520, an iron core 530, and an elastic element 540. One end of the push rod 510 is located inside the coil frame 300, and the other end extends into the support base 431 of the static contact module 400. The moving contact piece 520 is connected to the end of the push rod 510 that extends into the support base 431. The iron core 530 is disposed inside the coil frame 300 and sleeved on the push rod 510. The elastic element 540 is sleeved on the push rod 510 and connected to the magnetic sheet 450 and the iron core 530.

[0056] Specifically, the push rod 510 extends into the support base 431 and has a slot at one end. The push rod 510 is fitted with a retaining spring 550 that engages with the slot. The movable contact piece 520 is fitted onto the push rod 510 and fits against the lower side of the retaining spring 550. The outer circumferential surface of the push rod 510 is fitted with a support sleeve 560, which is connected to the movable contact piece 520. The push rod 510 includes a first rod body and a second rod body that are coaxially connected. The diameter of the second rod body is smaller than the diameter of the first rod body, so that the outer circumferential surface of the push rod 510 located inside the coil frame 300 has a stepped surface 510a facing the iron core 530. The iron core 530 abuts against the support sleeve 560 and the bottom end of the iron core 530 abuts against the stepped surface 510a.

[0057] When coil 600 is energized, it generates an electromagnetic attraction force on iron core 530. Under the action of this electromagnetic attraction, iron core 530 drives support sleeve 560 to push moving contact 520 towards... Figure 4 The moving contact 520 moves upward, causing it to contact the first contact 410 and the second contact 420, thus making the first contact 410 and the second contact 420 electrically connected through the moving contact 520. Since the retaining ring 550 is engaged with the push rod 510, the moving contact 520 is attached to the retaining ring 550. As the iron core 530 and the moving contact 520 move upward, the push rod 510 also moves upward. At this time, the iron core 530 will continue to move beyond its travel distance due to the attraction of the magnetic sheet 450 until it is attracted by the magnetic sheet 450 and attached to it. At the same time, the elastic element 540 is compressed and generates elastic force. When the coil 600 is de-energized, the elastic element 540 pulls the iron core 530 away from the magnetic sheet 450 under the action of the elastic force. Since the push rod 510 has a stepped surface, the iron core 530 can abut against the stepped surface to drive the push rod 510 to move down, so that the moving contact 520 is separated from the first contact 410 and the second contact 420, thereby disconnecting the first contact 410 and the second contact 420 from each other, realizing the circuit switching of the load power supply and the load.

[0058] It can be seen that by setting a stepped surface on the push rod 510, the structure of the moving contact module 500 can be simplified, and there is no need to set an additional snap ring 550 on the moving contact module 500. The moving iron core 530, elastic element 540, support sleeve 560 and moving contact piece 520 can all be inserted from the end of the second rod away from the first rod, thus improving installation efficiency.

[0059] Furthermore, as described in the background art, since there is an unavoidable gap between the three parts—static contact module 400, dynamic contact module 500, and coil frame 300—and the inner wall of the iron cup, and they are not positioned in the axial and radial directions, they are prone to skewing during assembly, which affects the mechanical parameters of the relay 10.

[0060] Therefore, in order to solve the above problems, in some preferred embodiments, such as Figure 2 , Figure 4 and Figure 5 As shown, the static contact module 400 has multiple first protrusions 451, and the top of the coil holder 300 has a first groove 301. The first protrusions 451 are confined within the first groove 301, so that the coil holder 300 can be fixed to the static contact module 400 in both the axial and radial directions; as Figure 2 , Figure 4 and Figure 6 As shown, the inner cavity bottom wall of the cup body 200 has a second protrusion 201, and the bottom end of the coil frame 300 is provided with a second groove 302. The second protrusion 201 is limited in the second groove 302, so that the coil frame 300 can be fixed to the cup body 200 in the axial and radial directions, and can be fixed to the static contact module 400 in the axial and radial directions.

[0061] Specifically, in combination Figure 4 , Figure 7 and Figure 8 As shown, in one embodiment of the figure, a first convex 451 is provided on the side of the magnetic sheet 450 facing the coil holder 300, and there are multiple first convex 451s. All first convex 451s are spaced apart around the central axis of the cup body 200, and the first groove 301 is annularly surrounding the central axis of the cup body 200 (i.e., the central axis of the coil holder 300). Similarly, in conjunction with Figure 4 , Figure 9 and Figure 10 As shown, the second convex 201 is disposed on the bottom wall of the inner cavity of the cup body 200, and there are multiple second convex 201s. All the second convex 201s are spaced apart around the central axis of the cup body 200, and the second groove 302 is annularly surrounded on the central axis of the cup body 200 (i.e., the central axis of the coil frame 300).

[0062] It is easy to see that by designing the first groove 301 and the second groove 302 as annular, the first convex 451 can be confined in the first groove 301 regardless of the angle at which the static contact module 400 is installed on the coil holder 300; similarly, the second convex 201 can be confined in the second groove 302 regardless of the angle at which the coil holder 300 is installed in the iron cup, thus making installation more convenient and faster.

[0063] In some embodiments, the sidewall of the first protrusion 451 is interference-fitted with the sidewall of the first groove 301. In one embodiment, the diameter of the first protrusion 451 is larger than the groove width of the first groove 301. The first protrusion 451 is interference-fitted with the sidewall of the first groove 301 near the central axis of the cup body 200, and with the other sidewall of the first groove 301 away from the central axis of the cup body 200. This ensures the reliable positioning between the coil holder 300 and the cup body 200.

[0064] In another embodiment, the first protrusion 451 is interference-fitted with one side wall of the first groove 301 near the central axis of the cup body 200, and clearance-fitted with the other side wall of the first groove 301 away from the central axis of the cup body 200. This can reduce assembly difficulty while ensuring the reliability of the limiting position. The diameter of the first protrusion 451 can be greater than, less than or equal to the groove width of the first groove 301, and is not limited here.

[0065] In another embodiment, the first protrusion 451 is clearance-fitted with the side wall of the first groove 301 near the central axis of the cup body 200, and is interference-fitted with the other side wall of the first groove 301 away from the central axis of the cup body 200. This can reduce assembly difficulty while ensuring the reliability of the limiting position. The diameter of the first protrusion 451 can be greater than, less than or equal to the groove width of the first groove 301, and is not limited here.

[0066] The sidewall of the second protrusion 201 is interference-fitted with the sidewall of the second groove 302. In one embodiment, the diameter of the second protrusion 201 is larger than the groove width of the second groove 302. The second protrusion 201 is interference-fitted with the sidewall of the second groove 302 near the central axis of the cup body 200, and with the other sidewall of the second groove 302 away from the central axis of the cup body 200. This ensures the reliability of the positioning between the static contact module 400 and the coil frame 300.

[0067] In another embodiment, the second protrusion 201 is interference-fitted with one side wall of the second groove 302 near the central axis of the cup body 200, and clearance-fitted with the other side wall of the second groove 302 away from the central axis of the cup body 200. This can reduce assembly difficulty while ensuring the reliability of the limiting position. The diameter of the second protrusion 201 can be greater than, less than or equal to the groove width of the second groove 302, and is not limited here.

[0068] In another embodiment, the second protrusion 201 is clearance-fitted with the side wall of the second groove 302 near the central axis of the cup body 200, and interference-fitted with the other side wall of the second groove 302 away from the central axis of the cup body 200. This can reduce assembly difficulty while ensuring the reliability of the limiting position. The diameter of the second protrusion 201 can be greater than, less than or equal to the groove width of the second groove 302, and is not limited here.

[0069] It is worth mentioning that among the multiple first convex hulls 451, some of the first convex hulls 451 may form a clearance fit, while the remaining first convex hulls 451 may form an interference fit. Similarly, among the multiple second convex hulls 201, some of the second convex hulls 201 may form a clearance fit, while the remaining second convex hulls 201 may form an interference fit.

[0070] It is understandable that the shape of the first convex hull 451 and the second convex hull 201 are not limited to cylindrical shapes, but can also be other regular polygonal column structures or column structures of arbitrary irregular shapes.

[0071] It is also understandable that the first convex 451 can be provided at the top of the coil frame 300, and the first groove 301 is opened on the magnetic sheet 450; similarly, the second convex 201 can be provided at the bottom of the coil frame 300, and the second groove 302 is opened on the bottom wall of the inner cavity of the cup body 200.

[0072] Furthermore, in other embodiments, the first protrusion 451 and the first groove 301, and the second protrusion 201 and the second groove 302, can also be a transition fit. Even the fixing of the static contact module 400 and the coil holder 300, and the coil holder 300 and the cup body 200, is not limited to limiting the protrusion to the groove; none of these are limited here. Clearly, setting the first protrusion 451 and the first groove 301, and the second protrusion 201 and the second groove 302 to an interference fit is obviously the optimal implementation method, which can minimize the wobble between the coil holder 300, the static contact module 400, and the cup body 200.

[0073] Based on the above embodiments, to avoid relative movement between the static contact module 400 and the magnetic sheet 450, such as Figure 11As shown, in a preferred embodiment, the guide seat 432 has a plurality of third protrusions 4322 on the side facing the magnetic sheet 450, and the magnetic sheet 450 has a plurality of positioning holes 452 penetrating its opposite sides. Each third protrusion 4322 is interference-fitted into a corresponding positioning hole 452. It should be noted that the number of third protrusions 4322 and positioning holes 452 is not limited and can be arbitrary. It is also understood that the third protrusions 4322 and positioning holes 452 can also be in a transition fit, and the third protrusions 4322 can also be provided on the side of the magnetic sheet 450 facing the guide seat 432, and the positioning holes 452 can be formed on the guide seat 432. The above is not limited in this application.

[0074] Thus, with the coil frame 300 fixed inside the cup body 200 and the static contact module 400 fixed to the coil frame 300, the above-mentioned arrangement can stably position the support seat 431 and guide seat 432 of the static contact module 400, preventing them from shaking, thereby also stably positioning the first contact 410 and the second contact 420, preventing them from shaking.

[0075] To prevent relative movement between the static contact module 400 and the coil holder 300 in the circumferential direction, preferably, a combination of Figure 3 and Figure 12 As shown, the outer wall of the support base 431 has a guide groove 12a extending along its own axial direction. Based on this, the bottom end of the support base 431 has an annular groove 4311 surrounding the central axis of the cup body 200. The annular groove 4311 forms a stepped surface on the support base 431 facing the guide seat 432. The guide seat 432 has a flange 4323 around its own central axis (i.e., the central axis of the cup body 200) around its own central axis. The flange 4323 is accommodated in the annular groove 4311 and abuts against the stepped surface. The flange 4323 has a glue storage position 12b that penetrates its own outer wall and inner wall and communicates with the guide groove 12a.

[0076] Thus, the inner walls of the adhesive guide groove 12a and the adhesive storage position 12b together with the inner wall of the cup body 200 form the adhesive leakage groove 12, allowing the sealant 700 to flow into the adhesive leakage groove 12 before curing and fill it completely. In this way, even if there is a gap between the cup body 200 and the static contact module 400 after the sealant 700 has cured, the cup body 200 and the static contact module 400 can still be fixed to each other by the sealant 700 filled in the adhesive leakage groove 12, thereby ensuring that the cup body 200 and the static contact module 400 fit tightly and reliably.

[0077] To enhance the positioning between the coil holder 300 and the static contact module 400 and the cup body 200, preferably, as follows: Figure 13As shown, the relay 10 provided in this application also includes two conductive components 800. Each conductive component 800 is disposed on the coil frame 300 and interference-fitted through the stationary contact module 400. One end of one conductive component 800 is connected to the positive terminal of the coil 600, and the other end is used to connect to the positive terminal of an external power supply. One end of the other conductive component 800 is connected to the negative terminal of the coil 600, and the other end is used to connect to the negative terminal of an external power supply.

[0078] Specifically, each conductive component 800 includes a terminal block 810 for connecting to an external power source and a conductive sheet 820 for connecting to a coil 600. The terminal block 810 is interference-fitted through the support base 431, and one end of the conductive sheet 820 is inserted into the terminal block 810, while the other end is connected to the coil 600.

[0079] It can be seen that by inserting the terminal 810 of the conductive component 800 into the support base 431 with an interference fit, the support base 431 cannot rotate relative to the coil 600, thereby restricting the relative movement between the coil frame 300 and the static contact module 400 in the circumferential direction.

[0080] Additionally, see Figure 1 and Figure 12 In some embodiments, the relay 10 of this application further includes a retaining ring 900 and an air tube 1000. The retaining ring 900 is snapped onto the housing 100 and covers the opening of the housing 100. The retaining ring 900 has a glue-filling port 901 and a through hole 902 that pass through its opposite sides. The glue-filling port 901 and the through hole 902 are connected to the opening of the housing 100. The air tube 1000 passes through the through hole 902 and is inserted into the conductive unit. By setting a retaining ring 900 to snap onto the housing 100, it is convenient to inject sealant 700 through the glue-filling port 901 during the assembly of the relay 10, and it also prevents a large amount of sealant 700 from overflowing from the opening of the housing 100. By setting an air pipe 1000, it is possible to easily perform vacuuming to remove air from the relay 10, reduce the resistance and friction of the mechanical parts of the relay 10, thereby improving the motion accuracy and sensitivity. It can also remove moisture and ions from the housing 100 of the relay 10, reduce the breakdown voltage and current of the relay 10 under high voltage, thereby improving its insulation strength and electrical performance. The air pipe 1000 also allows for the convenient introduction of inert gas to protect the first contact 410 and the second contact 420, preventing the high temperature of the electric arc from burning out the first contact 410 and the second contact 420, thus extending the service life of the relay 10.

[0081] See Figures 1 to 3 The assembly steps for the relay 10 provided in this application are as follows:

[0082] First, the coil frame 300 with the coil 600 wound on it and the stationary contact module 400 are assembled into a whole. Then, the conductive component 800 is installed on the coil frame 300 and connected to the end of the coil 600. Then, the stationary contact module 400 is fixedly installed on the coil frame 300, so that the conductive component 800 is interference-fitted through the stationary contact module 400.

[0083] Then, the coil frame 300 and the static contact module 400 are pressed into the cup body 200;

[0084] Next, the cup body 200, which has the coil frame 300 and the static contact module 400 pressed into it, is inserted into the outer casing 100, and the retaining ring 900 is snapped onto the outer casing 100.

[0085] Finally, sealant 700 is injected through the glue inlet 901 to seal the opening of the outer casing 100, and the air tube 1000 is then covered.

[0086] It should be noted that the basic functions of the relay 10 can be achieved even without the housing 100, the retaining ring 900, and the sealant 700. However, as the preferred embodiment, the relay 10 including the housing 100, the retaining ring 900, and the sealant 700 obviously has the most complete functions and the best technical effect.

[0087] Therefore, by combining the above-mentioned series of embodiments with convex hulls, the static contact module 400 and coil frame 300 inside the relay 10 are stably fixed in the cup body 200, preventing the static contact unit and coil frame 300 from being misaligned during assembly. This avoids the situation where the mechanical parameters of the relay 10 (such as the contact gap distance between the moving contact module 500 and the static contact module 400) are affected by the misalignment of the static contact unit and coil frame 300.

[0088] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A relay characterized by comprising: The utility model relates to a cup body, a coil frame, a static contact module and a dynamic contact module, and the cup body has a containing cavity with an open end. The coil frame is arranged in the containing cavity and is provided with a coil, and the bottom end of the coil frame and one of the bottom wall of the containing cavity are provided with a plurality of first convex blocks, and the other is provided with a first recess, and the first convex blocks are limited in the first recess. The static contact module is arranged on the coil frame and closes the opening of the containing cavity, one of the end of the static contact module and the top end of the coil frame is provided with a plurality of second convex blocks, and the other is provided with a second recess, and the second convex blocks are limited in the second recess. The static contact module has a first contact for connecting a load power supply and a second contact for connecting a load. The dynamic contact module is movably arranged in the coil frame, and the dynamic contact module has a conduction state of abutting against the first contact and the second contact and a disconnection state of being separated from the first contact and the second contact, and the conduction state or the disconnection state is switched with the power-on or power-off of the coil.

2. The relay of claim 1, wherein All the first convex blocks are arranged at intervals around the central axis of the cup body, and the first recess is annularly arranged around the central axis of the cup body. And / or, all the second convex blocks are arranged at intervals around the central axis of the cup body, and the second recess is annularly arranged around the central axis of the cup body.

3. The relay of claim 1, wherein The side wall of the first convex block is in interference fit with the side wall of the first recess.

4. The relay according to claim 3, characterized in that The first convex block and the first recess are in interference fit with one side wall close to the central axis of the cup body, and are in clearance fit with the other side wall away from the central axis of the cup body. Or, the first convex block and the first recess are in clearance fit with one side wall close to the central axis of the cup body, and are in interference fit with the other side wall away from the central axis of the cup body.

5. The relay of claim 1, wherein The side wall of the second convex block is in interference fit with the side wall of the second recess.

6. The relay of claim 5, wherein The second convex block and the second recess are in interference fit with one side wall close to the central axis of the cup body, and are in clearance fit with the other side wall away from the central axis of the cup body. Or, the second convex block and the second recess are in clearance fit with one side wall close to the central axis of the cup body, and are in interference fit with the other side wall away from the central axis of the cup body.

7. The relay of claim 1, wherein The static contact module comprises: A support assembly is attached to the side wall of the containing cavity, the first contact and the second contact are connected to the support assembly and partially extend into the support assembly, and a magnetic steel is arranged in the support assembly. A magnetic conducting sheet is attached to one side of the top end of the coil frame, and the other side is attracted by the magnetic steel to be attached to the support assembly, the second convex blocks are arranged on one of the magnetic conducting sheet and the coil frame, and the second recess is arranged on the other.

8. The relay according to claim 7, characterized in that The support assembly comprises a support base and a guide base, the first contact and the second contact are arranged at one end of the support base, the guide base is connected to the other end of the support base, the magnetic conducting sheet is attached to the side of the guide base away from the support base, one of the guide base and the magnetic conducting sheet is provided with a plurality of third convexes, and the other is provided with a plurality of positioning holes, and the third convexes are limited in the corresponding positioning holes.

9. The relay according to claim 8, characterized in that The side wall of the third convex is in interference fit with the hole wall of the positioning hole.

10. The relay of claim 1, wherein The relay further comprises a shell, one end of the shell is open, and the cup body is arranged in the shell; an outer wall of the cup body, an inner wall of the shell and part of the surface of the static contact module are formed with a glue filling groove, the glue filling groove is filled with sealing glue, and the sealing glue seals the opening of the shell.

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