Relay

Abstract

The relay comprises a shell, a cup body and a conductive unit, one end of the shell is provided with a first opening, the cup body is arranged in the shell, the end, facing the first opening, of the cup body is provided with a second opening, and the conductive unit is arranged in the cup body and seals the second opening. Glue pouring grooves are formed in the inner wall of the shell, the outer wall of the cup body and part of the outer surface of the conductive unit, glue leaking grooves communicated with the glue pouring grooves are formed in the outer side wall of the conductive unit and the inner wall of the cup body, and the glue pouring grooves and the glue leaking grooves are filled with sealant, so that the interior of the relay can be reliably sealed, and the reliability of the relay is improved. And the sealant can flow into the sealant leaking groove to fill the sealant leaking groove by utilizing the fluidity of the sealant before curing. In this way, after the sealant is cured, even if a gap exists between the cup body and the conductive unit, the cup body and the conductive unit can be fixed through the sealant filled in the sealant leakage groove, so that the cup body and the conductive unit cannot move mutually, and the situation that the cup body and the conductive unit are prone to skew 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 electrical components inside common relay products are basically composed of a static contact module, a moving contact module, and a coil. These three parts are assembled and combined to form a conductive unit for controlling the power supply and switching on / off of the load circuit, and then pressed into an iron cup. However, in the actual assembly process, due to the unavoidable gap between the three parts and the inner wall of the iron cup, there is no positioning in the axial and radial directions. Therefore, it is easy for misalignment to occur during the assembly process, which will affect 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] A housing, one end of which has a first opening;

[0007] A cup body is disposed within the outer shell, and the end of the cup body facing the first opening has a second opening;

[0008] A conductive unit is disposed within the cup body and closes the second opening. The conductive unit is used to connect the load power supply and the load, and to control the circuit switching of the load power supply and the load. A potting groove is formed on the inner wall of the outer shell, the outer wall of the cup body, and part of the outer surface of the conductive unit. A leakage groove communicating with the potting groove is formed on the outer wall of the conductive unit and the inner wall of the cup body. The potting groove and the leakage groove are filled with sealant. The sealant closes the first opening and fixes the conductive unit and the cup body to each other.

[0009] In one embodiment, the conductive unit includes:

[0010] A coil holder is fixed inside the cup body and has a coil wound around it;

[0011] A static contact module is fixed on the coil frame. A portion of the outer surface of the static contact module and the inner sidewall of the cup body together form the glue leakage 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.

[0012] 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.

[0013] In one embodiment, the static contact module includes a support base and a guide base, the outer side wall of the support base is attached to the inner side wall of the cup body, and the guide base connects to the support base and closes the opening of the support base; the glue leakage groove includes a flow channel, which is formed on the outer wall of the support base along the axial direction of the support base.

[0014] In one embodiment, the bottom end of the support base has an annular groove surrounding the central axis of the cup body, and the annular groove forms a stepped surface on the support base facing the guide seat; the guide seat has a flange surrounding the central axis of the cup body at its peripheral edges, the flange being accommodated in the annular groove and abutting against the stepped surface; the glue leakage groove also includes a glue storage position, the glue storage position penetrating the outer wall and inner wall of the flange and communicating with the guide groove.

[0015] In one embodiment, the guide seat has a guide portion that fits against the inner sidewall of the support seat. A magnet is provided in the guide portion. The static contact module also includes a magnetic sheet. One side of the magnetic sheet is attached to the top of the coil frame, and the other side is attracted by the magnet to fit against the support seat. One of the guide seat and the magnetic sheet is provided with a plurality of protrusions, and the other is provided with a plurality of positioning holes. Each of the protrusions is interference-fitted into the corresponding positioning hole.

[0016] In one embodiment, one of the static contact module and the top of the coil frame has a first protrusion, and the other has a first groove, wherein the first protrusion is interference-fitted into the first groove;

[0017] And / or, one of the bottom end of the coil frame and the inner cavity bottom wall of the cup body has a second protrusion, and the other has a second groove, wherein the second protrusion is interference-fitted into the second groove.

[0018] In one embodiment, the first convex bulge has a plurality of convex bulges, all of which are spaced apart around the central axis of the cup body, and the first groove is annularly surrounding the central axis of the cup body;

[0019] And / or, the second convex bulge has a plurality of convex bulges, all of which are spaced apart around the central axis of the cup body, and the second groove is circumferentially surrounding the central axis of the cup body.

[0020] In one embodiment, the relay further includes two conductive components, each of which is disposed on the coil frame and interference-fitted through the static contact module; one end of one conductive component is connected to the positive terminal of the coil and the other end is used to connect to the positive terminal of an external power supply, and one end of the other conductive component is connected to the negative terminal of the coil and the other end is used to connect to the negative terminal of the external power supply.

[0021] In one embodiment, the relay further includes a retaining ring and an air tube. The retaining ring is snapped onto the housing and covers the first opening. The retaining ring has a glue-filling port and a limiting groove that extend through opposite sides of itself. The glue-filling port and the limiting groove are connected to the first opening. The air tube passes through the limiting groove and is inserted into the conductive unit.

[0022] In one embodiment, the fixing ring is provided with an air pipe cover, which is inserted into the limiting groove and covers the air pipe. One of the groove wall of the limiting groove and the side wall of the air pipe cover is provided with a hook, and the other is provided with a protrusion. The hook and the protrusion engage with each other to fix the air pipe cover on the fixing ring.

[0023] The aforementioned relay features a potting groove formed on the inner wall of the outer casing, the outer wall of the cup body, and part of the outer surface of the conductive unit. A leakage groove, connecting the potting groove, is formed on the outer wall of the conductive unit and the inner wall of the cup body. This allows the potting groove to be filled with sealant, reliably sealing the relay's interior, and also enables the sealant, before curing, to flow into and fill the leakage groove. Thus, once the sealant has cured, even if a gap exists between the cup body and the conductive unit, they are held together by the sealant filling the leakage groove, preventing movement and avoiding misalignment during assembly. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the appearance of a relay provided in one embodiment of this application.

[0025] Figure 2 A cross-sectional view of a relay provided in an embodiment of this application.

[0026] Figure 3 An exploded view of a relay provided in an embodiment of this application. Figure 1 .

[0027] Figure 4 This is an exploded view of the conductive unit in a relay provided in an embodiment of this application.

[0028] Figure 5 Axial view of a conductive element in a relay provided in an embodiment of this application Figure 1 .

[0029] Figure 6 This is an exploded view of the stationary contact module in a relay provided in an embodiment of this application.

[0030] Figure 7 A partial structural cross-section of a relay provided in an embodiment of this application. Figure 1 .

[0031] Figure 8 A partial structural cross-section of a relay provided in an embodiment of this application. Figure 2 .

[0032] Figure 9 This is a schematic diagram of the structure of the magnetic sheet in a relay provided in an embodiment of this application.

[0033] Figure 10 A schematic diagram of the coil frame structure in a relay provided in an embodiment of this application. Figure 1 .

[0034] Figure 11 A schematic diagram of the structure of the cup body in a relay provided in an embodiment of this application. Figure 1 .

[0035] Figure 12 A schematic diagram of the coil frame structure in a relay provided in an embodiment of this application. Figure 2 .

[0036] Figure 13 Axial view of a conductive element in a relay provided in an embodiment of this application Figure 2 .

[0037] Explanation of reference numerals in the attached figures:

[0038] 10. Relay; 11. Potting tank; 12. Leakage tank; 12a. Flow guide; 12b. Glue storage position; 100. Housing; 101. First opening; 200. Cup body; 201. Second opening; 202. Second convex bulge; 300. Conductive unit; 310. Coil frame; 311. First groove; 312. Second groove; 320. Static contact module; 321. First contact; 322. Second contact; 323. Support base; 3231. Annular groove; 3232. Stepped surface; 324. Guide seat; 3241. Guide 3242, flange; 3243, protrusion; 325, magnet; 326, magnetic sheet; 3261, positioning hole; 3262, first protrusion; 330, moving contact module; 331, push rod; 332, moving contact piece; 333, iron core; 334, elastic element; 340, coil; 400, sealant; 500, conductive component; 510, terminal block; 520, conductive sheet; 600, fixing ring; 601, glue inlet; 602, limiting groove; 603, hook; 700, air tube; 800, air tube cap. Detailed Implementation

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] See Figure 1 and Figure 2 , Figure 1 A schematic diagram of the appearance of a relay 10 according to an embodiment of this application is shown. Figure 2 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 body 200, and a conductive unit 300. One end of the housing 100 has a first opening 101. The cup body 200 is disposed within the housing 100, and its end facing the first opening 101 has a second opening 201. The conductive unit 300 is disposed within the cup body 200 and closes the second opening 201. It is used to connect a load power supply and a load (e.g., a vehicle) to control the on / off state of the circuit of the load power supply and the load.

[0048] In one embodiment, such as Figure 2 As shown, a potting groove 11 is formed on the inner wall of the outer casing 100, the outer wall of the cup body 200, and part of the outer surface of the conductive unit 300. The potting groove 11 is filled with sealant 400, which seals the first opening 101, thereby sealing the conductive unit 300 and the cup body 200 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.

[0049] However, as described in the background art, in the actual assembly process of the existing relay 10, since there is an unavoidable gap between the conductive unit 300 and the inner wall of the iron cup (i.e., the cup body 200), there is no positioning in the axial and radial directions, so it is easy to become skewed during the assembly process.

[0050] Therefore, as an improvement to the above embodiment, a glue-leaking groove 12 communicating with the glue-pouring groove 11 is formed on the outer wall of the conductive unit 300 and the inner wall of the cup body 200, and the glue-leaking groove 12 is also filled with sealant 400. By forming the glue-leaking groove 12, the sealant 400 can flow into the glue-leaking groove 12 and fill it before curing. In this way, after the sealant 400 cures, even if there is a gap between the cup body 200 and the conductive unit 300, the cup body 200 and the conductive unit 300 can be fixed to each other by the sealant 400 filled in the glue-leaking groove 12, so that they will not move relative to each other.

[0051] In one specific embodiment, the conductive unit 300 includes a coil frame 310, a static contact module 320, and a moving contact module 330. The coil frame 310 is coaxially fixed in the cup body 200 and has a coil 340 wound around it. The static contact module 320 is coaxially fixed on the coil frame 310, and part of its outer surface forms a glue-draining groove 12 together with the inner sidewall of the cup body 200. The static contact module 320 has a first contact 321 and a second contact 322 for connecting a load. The moving contact module 330 is movably inserted through the coil frame 310 and partially extends into the static contact module 320. The moving contact module 330 has a conducting state that abuts against the first contact 321 and the second contact 322 and a disconnected state that is disconnected from the first contact 321 and the second contact 322. The conducting state or the disconnected state is switched as the coil 340 is energized or de-energized.

[0052] In some embodiments, when the coil 340 is energized, the coil 340 generates a magnetic field, and the moving contact module 330 is driven by magnetic force in the magnetic field and abuts against the first contact 321 and the second contact 322, so that the load power supply connected to the first contact 321 and the load connected to the second contact 322 are electrically connected to each other; or when the coil 340 is de-energized, the moving contact module 330 is reset and disengaged from the first contact 321 and the second contact 322, thereby realizing the disconnection of the circuit controlling the load power supply and the load.

[0053] In some other embodiments, when the coil 340 is de-energized, the moving contact module 330 can abut against the first contact 321 and the second contact 322 under the elastic force provided by the elastic element, so that the load power supply connected to the first contact 321 and the load connected to the second contact 322 are electrically connected to each other. When the coil 340 is energized, the coil 340 generates a magnetic field, and the moving contact module 330 is driven by the magnetic force in the magnetic field to overcome the elastic force of the elastic element and disengage from the first contact 321 and the second contact 322, thereby realizing the disconnection of the circuit controlling the load power supply and the load.

[0054] Regarding the specific structure of the static contact module 320, such as Figure 3 and Figure 4 As shown, the static contact module 320 has a cylindrical structure, including a support base 323 and a guide base 324. The outer wall of the support base 323 is attached to the inner wall of the cup body 200. The first contact 321 and the second contact 322 are installed at one end of the support base 323 along its own axial direction and partially extend into the inner cavity of the support base 323. The guide base 324 connects to the support base 323 and closes the opening of the support base 323. Specifically, the guide base 324 has two guide portions 3241 arranged radially spaced from itself. Each guide portion 3241 is used to contact the inner wall of the support base 323 when the support base 323 is connected to the guide base 324, thereby providing guidance and preventing the support base 323 from failing to connect smoothly to the guide base 324 in one go.

[0055] In one implementation, such as Figure 5 As shown, the glue leakage tank 12 includes a flow guide 12a and a glue storage position 12b. The flow guide 12a is formed along the axial direction of the support 323 on the outer wall of the support 323. In the embodiment shown in the figure, there are two flow guides 12a, which are arranged parallel to each other. Figure 4 As shown, the bottom end of the support base 323 is provided with an annular groove 3231 surrounding the central axis of the cup body 200. The annular groove 3231 forms a stepped surface 3232 on the support base 323 facing the guide seat 324. The guide seat 324 has a flange 3242 around its own central axis (i.e., the central axis of the cup body 200) on its four sides. The flange 3242 is accommodated in the annular groove 3231 and abuts against the stepped surface 3232. The glue storage position 12b penetrates the outer wall and inner wall of the flange 3242 and connects to the guide groove 12a.

[0056] Thus, the inner walls of the flow channel 12a and the glue storage position 12b together with the inner wall of the cup body 200 form the glue leakage groove 12. Before curing, the sealant 400 flows along the flow channel 12a into the glue storage position 12b. After the sealant 400 fills the glue storage position 12b, it fills the flow channel 12a. Since the volume of the glue storage position 12b is larger than that of the flow channel 12a, the glue leakage groove 12 can hold more sealant 400, thereby firmly fixing the cup body 200 and the static contact module 320 together, ensuring that the cup body 200 and the static contact module 320 fit tightly and reliably.

[0057] It is worth noting that when the first contact 321 is connected to a load power supply and the second load is connected to a load and electrically conductive, an electric repulsion force will be generated between the first contact 321 and the second contact 322 due to the energization, preventing the moving contact module 330 from contacting the first contact 321 and the second contact 322. Therefore, in order to overcome the influence of the electric repulsion force, in a preferred embodiment, a magnet 325 is provided in the guide portion 3241 of the guide seat 324, and the stationary contact module 320 also includes a magnetic sheet 326. One side of the magnetic sheet 326 is attached to the top of the coil frame 310, and the other side is attracted by the magnetic force of the magnet 325 to be attached to the support seat 323. This allows the magnetic sheet 326 to attract the moving contact module 330 when it contacts the first contact 321 and the second contact 322, preventing the moving contact module 330 from detaching from the first contact 321 and the second contact 322 when they are energized.

[0058] Furthermore, such as Figure 6As shown, the guide seat 324 has several protrusions 3243 on the side facing the magnetic sheet 326, and the magnetic sheet 326 has several positioning holes 3261 extending through its opposite sides. Each protrusion 3243 is interference-fitted into a corresponding positioning hole 3261, and there are two protrusions 3243 arranged symmetrically along the radial direction of the guide seat 324. There are also two corresponding positioning holes 3261. It should be noted that the number of protrusions 3243 and positioning holes 3261 is not limited and can be arbitrary. Furthermore, it can be understood that the protrusions 3243 can also be located on the side of the magnetic sheet 326 facing the guide seat 324, and the positioning holes 3261 can be located on the guide seat 324; this is not limited in this respect.

[0059] Thus, with the coil frame 310 fixed inside the cup body 200 and the static contact module 320 fixed to the coil frame 310, the above-mentioned arrangement can stably position the support seat 323 and guide seat 324 of the static contact module 320, preventing them from shaking, thereby also stably positioning the first contact 321 and the second contact 322, preventing them from shaking.

[0060] Regarding the specific fixing methods between the static contact module 320 and the coil holder 310, and between the coil holder 310 and the cup body 200, such as... Figure 2 and Figure 7 As shown, the static contact module 320 has multiple first protrusions 3262, and the top of the coil holder 310 has a first groove 311. The first groove 311 is interference-fitted within the coil holder 310, allowing the coil holder 310 to be fixed to the static contact module 320 in both the axial and radial directions. Figure 2 and Figure 8 As shown, the bottom end of the coil holder 310 and the inner cavity bottom wall of the cup body 200 have a second protrusion 202, and the other has a second groove 312. The second protrusion 202 is interference-fitted into the second groove 312, so that the coil holder 310 can be fixed to the cup body 200 in the axial and radial directions.

[0061] Combination Figure 2 and Figure 9 As shown in the embodiment depicted, a first convex bulge 3262 is disposed on the side of the magnetic sheet 326 facing the coil holder 310, and there are multiple first convex bulges 3262, all of which are spaced apart around the central axis of the cup body 200, such as... Figure 10 As shown, the first groove 311 is arranged in a ring around the central axis of the cup body 200 (i.e., the central axis of the coil holder 310). Similarly, combined with Figure 2 and Figure 11As shown, the second convex bulge 202 is disposed on the bottom wall of the inner cavity of the cup body 200, and there are multiple second convex bulges 202. All the second convex bulges 202 are spaced apart around the central axis of the cup body 200, such as... Figure 12 As shown, the second groove 312 is arranged in a ring around the central axis of the cup body 200 (i.e., the central axis of the coil holder 310).

[0062] It is easy to see that by designing the first groove 311 and the second groove 312 as annular, the first convex 3262 can be confined in the first groove 311 regardless of the angle at which the static contact module 320 is installed on the coil holder 310; similarly, the second convex 202 can be confined in the second groove 312 regardless of the angle at which the coil holder 310 is installed in the iron cup, thus making installation more convenient and faster.

[0063] It is understandable that the first protrusion 3262 can also be provided at the top of the coil frame 310, and the first groove 311 is formed on the magnetic sheet 326; similarly, the second protrusion 202 can also be provided at the bottom of the coil frame 310, and the second groove 312 is formed on the bottom wall of the inner cavity of the cup body 200. Furthermore, the fixation between the static contact module 320 and the coil frame 310, as well as between the coil frame 310 and the cup body 200, is not limited to the method of confining the protrusion to the groove, and there is no limitation in this regard.

[0064] Furthermore, such as Figure 13 As shown, the relay 10 provided in this application also includes two conductive components 500. Each conductive component 500 is disposed on the coil frame 310 and interference-fitted through the stationary contact module 320. One end of one conductive component 500 is connected to the positive terminal of the coil 340, and the other end is used to connect to the positive terminal of the external power supply. One end of the other conductive component 500 is connected to the negative terminal of the coil 340, and the other end is used to connect to the negative terminal of the external power supply.

[0065] For details, please continue reading Figure 13 Each conductive component 500 includes a terminal block 510 for connecting to an external power source and a conductive sheet 520 for connecting to a coil 340. The terminal block 510 is interference-fitted through the support base 323. One end of the conductive sheet 520 is inserted into the terminal block 510, and the other end is connected to the coil 340.

[0066] It can be seen that by inserting the terminal 510 of the conductive component 500 into the support base 323 with an interference fit, the support base 323 cannot rotate relative to the coil 340, thereby restricting the relative movement between the coil frame 310 and the static contact module 320 in the circumferential direction.

[0067] See Figure 2In one embodiment, the moving contact module 330 includes a push rod 331, a moving contact piece 332, an iron core 333, and an elastic element 334. One end of the push rod 331 is located inside the coil frame 310, and the other end extends into the support base 323 of the static contact module 320. The moving contact piece 332 is connected to the end of the push rod 331 that extends into the support base 323. The iron core 333 is disposed inside the coil frame 310 and sleeved on the push rod 331. The elastic element 334 is sleeved on the push rod 331 and connected to the magnetic sheet 326 and the iron core 333.

[0068] When coil 340 is energized, it generates an electromagnetic attraction to iron core 333. Under this attraction, iron core 333 moves push rod 331 and moving contact 332 in the upward direction shown in the figure, causing moving contact 332 to contact first contact 321 and second contact 322. This allows first contact 321 and second contact 322 to be electrically connected through moving contact 332. At this time, due to the attraction of magnetic sheet 326, iron core 333 will continue to move beyond its travel distance until it is connected to the magnetic sheet. The magnetic sheet 326 is attracted to and adheres to the magnetic conductive sheet 326, while the elastic element 334 is compressed and generates elastic force. When the coil 340 is de-energized, the elastic element 334 pulls the iron core 333 away from the magnetic conductive sheet 326 under the action of the elastic force and drives the push rod 331 to move down, so that the moving contact 332 is separated from the first contact 321 and the second contact 322, thereby disconnecting the first contact 321 and the second contact 322 from each other, thus realizing the circuit switching of controlling the load power supply and the load.

[0069] Additionally, see Figure 1 and Figure 5In some embodiments, the relay 10 of this application further includes a retaining ring 600 and an air tube 700. The retaining ring 600 is snapped onto the housing 100 and covers the first opening 101. The retaining ring 600 has a glue-filling port 601 and a limiting groove 602 that pass through its opposite sides. The glue-filling port 601 and the limiting groove 602 are connected to the first opening 101. The air tube 700 passes through the limiting groove 602 and is inserted into the conductive unit 300. By setting a retaining ring 600 to snap onto the housing 100, it is convenient to inject sealant 400 through the glue-filling port 601 during the assembly of the relay 10, and it also prevents a large amount of sealant 400 from overflowing from the first opening 101 of the housing 100. By setting an air pipe 700, 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 700 also allows for the convenient introduction of inert gas to protect the first contact 321 and the second contact 322, preventing the high temperature of the electric arc from burning out the first contact 321 and the second contact 322, thus extending the service life of the relay 10.

[0070] Furthermore, in order to protect the air pipe 700 when it is not being pumped out, such as... Figure 1 As shown, a trachea cover 800 is provided on the fixing ring 600. The trachea cover 800 is inserted into the limiting groove 602 and covers the trachea 700. In the embodiment shown in the figure, the groove wall of the limiting groove 602 is provided with a hook 603, and the trachea cover 800 is provided with a protrusion. The hook 603 and the protrusion engage with each other to fix the trachea cover 800 on the fixing ring 600, thereby preventing the trachea cover 800 from falling off. Of course, the hook 603 can also be provided on the trachea cover 800, and the protrusion can be provided on the groove wall of the limiting groove 602. There is no limitation here.

[0071] See Figures 1 to 4 The assembly steps for the relay 10 provided in this application are as follows:

[0072] First, assemble the conductive unit 300, install the conductive component 500 on the coil frame 310 and connect it to the end of the coil 340, and then fix the static contact module 320 on the coil frame 310 so that the conductive component 500 passes through the static contact module 320 with interference fit.

[0073] Then, the conductive unit 300 containing the conductive component 500 is pressed into the cup body 200 as a whole;

[0074] Next, the cup body 200 with the conductive unit 300 pressed in is inserted into the outer shell 100, and the retaining ring 600 is snapped onto the outer shell 100;

[0075] Finally, sealant 400 is injected through the glue inlet 601 to seal the first opening 101, and the air tube cap 800 is then placed on top.

[0076] Therefore, by combining the above-mentioned series of embodiments of setting convex bulges and injecting sealant 400 into the glue leakage groove 12, the conductive unit 300 as a whole is stably fixed in the cup body 200, preventing the conductive unit 300 from being easily skewed during assembly, and thus avoiding the situation where the mechanical parameters of the relay 10 (such as the contact gap distance between the moving contact module 330 and the stationary contact module 320) are affected by the skewness of the conductive unit 300.

[0077] 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.

[0078] 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 kind of electric switch, including: A shell, one end of the shell has a first opening; A cup is arranged in the shell, and one end of the cup towards the first opening has a second opening; A conductive unit is arranged in the cup and seals the second opening, the conductive unit is used to connect load power supply and load, and is used to control the circuit on-off of load power supply and load;The inner wall of the shell, the outer wall of the cup and part of the outer surface of the conductive unit are formed with glue filling groove, the outer wall of the conductive unit and the inner wall of the cup are formed with glue leakage groove which is communicated with the glue filling groove, the glue filling groove and the glue leakage groove are filled with sealant, the sealant seals the first opening and makes the conductive unit and the cup fixed with each other.

2. The relay of claim 1, wherein The conductive unit includes: A coil holder is fixed in the cup and is provided with a coil; A static contact module is fixed on the coil holder, part of the outer surface of the static contact module and the inner side wall of the cup jointly form the glue leakage groove, and the static contact module has a first contact for connecting the load power supply and a second contact for connecting the load; A dynamic contact module is movably arranged in the coil holder, the dynamic contact module has a conducting state abutting against the first contact and the second contact and a disconnected state away from the first contact and the second contact, and the conducting state or the disconnected state is switched with the energization or de-energization of the coil.

3. The relay according to claim 2, characterized in that The static contact module includes a support seat and a guide seat, the outer side wall of the support seat is fitted to the inner side wall of the cup, and the guide seat is connected to the support seat and seals the opening of the support seat;The glue leakage groove includes a flow guide groove, and the flow guide groove is formed on the outer wall of the support seat along the axial direction of the support seat.

4. The relay according to claim 3, characterized in that A ring groove is formed on the bottom end of the support seat around the central axis of the cup, and a step surface is formed on the support seat towards the guide seat;The four peripheral edges of the guide seat have a flange around the central axis of the cup, the flange is accommodated in the ring groove and abuts against the step surface;The glue leakage groove further includes a glue storage site, and the glue storage site penetrates the outer wall and the inner wall of the flange and is communicated with the flow guide groove.

5. The relay of claim 3, wherein The guide seat has a guide portion fitted to the inner side wall of the support seat, and a magnetic steel is arranged in the guide portion, the static contact module further includes a magnetic sheet, one side of the magnetic sheet is fitted to the top end of the coil holder, and the other side is attracted by the magnetic steel to be fitted to the support seat, one of the guide seat and the magnetic sheet is provided with a plurality of protrusions, and the other is provided with a plurality of positioning holes, and each protrusion is interference-fit in the corresponding positioning hole.

6. The relay of claim 2, wherein One of the top end of the static contact module and the coil holder has a first convex, and the other is provided with a first recess, and the first convex is interference-fit in the first recess; And / or, one of the bottom end of the coil holder and the bottom wall of the inner cavity of the cup has a second convex, and the other is provided with a second recess, and the second convex is interference-fit in the second recess.

7. The relay according to claim 6, characterized in that The first convex has a plurality of, all the first convex is arranged around the central axis of the cup, the first groove is annularly around the central axis of the cup; And / or, the second convex has a plurality of, all the second convex is arranged around the central axis of the cup, the second groove is annularly around the central axis of the cup.

8. The relay of claim 2, wherein The relay further comprises two conductive components, each of the conductive components is arranged on the coil holder and is inserted into the static contact module in interference fit; one end of one of the conductive components is connected to the positive terminal of the coil, and the other end is used for connecting the positive terminal of an external power supply; one end of the other conductive component is connected to the negative terminal of the coil, and the other end is used for connecting the negative terminal of the external power supply.

9. The relay of claim 1, wherein The relay further comprises a fixing ring and an air pipe, the fixing ring is clamped to the shell and covers the first opening, and a glue filling opening and a limiting groove are formed in the fixing ring and extend through opposite sides of the fixing ring, the glue filling opening and the limiting groove are communicated with the first opening, and the air pipe is inserted into the limiting groove and the conductive unit.

10. The relay of claim 9, wherein The fixing ring is provided with an air pipe cover, the air pipe cover is inserted into the limiting groove and covers the air pipe, one of the groove wall of the limiting groove and the side wall of the air pipe cover is provided with a clamping hook, and the other is provided with a clamping convex, the clamping hook and the clamping convex are clamped with each other, so that the air pipe cover is fixedly installed on the fixing ring.

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