Magnetic circuit structure and relay

Abstract

The application relates to a magnetic circuit structure and a relay. The magnetic circuit structure comprises a coil holder, the coil holder is provided with a mounting hole and a gas exhaust groove, the mounting hole is arranged through in the height direction, and the gas exhaust groove is arranged on the inner wall of the mounting hole; a static iron core is arranged on the coil holder and located in the mounting hole; a dynamic iron core is movably arranged in the mounting hole and partially exposed from the coil holder, the dynamic iron core is oppositely arranged with the static iron core in the height direction; and the compressed gas generated when the dynamic iron core moves towards the static iron core can be discharged through the gas exhaust groove. In this way, the compressed gas generated when the dynamic iron core moves towards the static iron core can be quickly discharged through the gas exhaust groove, the movement of the dynamic iron core is prevented from being blocked by the compressed gas, the dynamic iron core is prevented from being stuck during the movement, the stability of the dynamic iron core in the height direction is ensured, the dynamic iron core can be accurately attracted to the static iron core, and the reliability of the relay in operation is improved.

Description

Technical Field

[0001] This application relates to the field of relay technology, and in particular to a magnetic circuit structure and 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), and is commonly used in automatic control circuits. Essentially, a relay is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits.

[0003] Typically, a relay includes at least a moving iron core, a stationary iron core, a moving contact, and a stationary contact. The moving iron core and the stationary iron core can separate or engage to control the contact or separation of the moving contact and the stationary contact, thereby achieving the closing or opening control of the relay.

[0004] Currently, when the moving iron core moves toward the stationary iron core, there are problems such as long engagement time and displacement of the moving iron core, which affect the engagement time and return time between the moving and stationary iron cores. Utility Model Content

[0005] Therefore, it is necessary to address the problem that the moving iron core may get stuck during its movement toward the stationary iron core, thus affecting the attraction between the moving and stationary iron cores. This presents a magnetic circuit structure and relay that can rapidly discharge compressed gas, prevent the moving iron core from getting stuck during its movement, ensure the stability of the moving iron core's movement along the height direction, and thereby improve the reliability of the relay operation.

[0006] A magnetic circuit structure, comprising:

[0007] A coil frame having a mounting hole and an exhaust groove, the mounting hole being disposed through the height direction, and the exhaust groove being disposed on the inner wall of the mounting hole;

[0008] A stationary iron core is disposed on the coil frame and located in the mounting hole;

[0009] A movable iron core is movably installed through the mounting hole, and the movable iron core and the stationary iron core are arranged relative to each other along the height.

[0010] The compressed gas generated when the moving iron core moves toward the stationary iron core can be discharged through the exhaust groove.

[0011] In this way, the compressed gas generated when the moving iron core moves toward the stationary iron core can be quickly discharged through the exhaust groove, avoiding the compressed gas from obstructing the movement of the moving iron core, thereby preventing the moving iron core from getting stuck during the movement, ensuring the stability of the moving iron core's movement along the height direction, so that the moving iron core can accurately engage with the stationary iron core, and shortening the engagement time and return time of the moving iron core and stationary iron core, thereby improving the reliability of the relay operation.

[0012] Meanwhile, by setting an exhaust groove on the inner wall of the mounting hole of the coil frame, the distance between the outer surface of the moving iron core and the inner wall of the mounting hole can be reduced, so that the inner wall of the mounting hole can guide the movement of the moving iron core, prevent the moving iron core from shifting in the height direction, prevent the moving iron core and the stationary iron core from generating foreign objects due to friction, and ensure that the moving iron core and the stationary iron core are accurately attracted or separated.

[0013] In one embodiment of this application, the exhaust groove extends through the coil frame along the height direction;

[0014] Alternatively, the exhaust groove extends along the height direction to one end of the coil frame.

[0015] In this way, the compressed gas generated when the moving iron core moves toward the stationary iron core can be quickly discharged through the exhaust groove, avoiding the accumulation of compressed gas between the moving iron core and the stationary iron core.

[0016] In one embodiment of this application, the number of exhaust grooves is multiple, and the multiple exhaust grooves are arranged at circumferential intervals along the mounting hole.

[0017] In this way, multiple exhaust channels can form an exhaust circuit, which facilitates the rapid discharge of compressed gas.

[0018] In one embodiment of this application, the number of exhaust grooves is two, and the two exhaust grooves are arranged radially opposite to each other along the mounting hole.

[0019] In this way, the two exhaust channels can form an exhaust circuit, which facilitates the rapid discharge of compressed gas.

[0020] In one embodiment of this application, the exhaust groove includes an exhaust bottom wall and opposing exhaust side walls. The exhaust bottom wall is recessed into the inner wall of the mounting hole, and the two exhaust side walls are disposed opposite each other on both sides of the exhaust bottom wall along the circumferential direction of the mounting hole, and together with the exhaust bottom wall, form the exhaust groove.

[0021] In this way, the exhaust bottom wall and exhaust side wall can guide the compressed gas, enabling the compressed gas to be discharged quickly.

[0022] In one embodiment of this application, the cross-sectional shape of the exhaust bottom wall is arranged in an arc shape or a straight line shape.

[0023] In this way, the arc-shaped or straight exhaust bottom wall can guide the compressed gas.

[0024] In one embodiment of this application, the exhaust sidewall is an arc-shaped surface or an inclined surface, and is transitionally connected to the exhaust bottom wall;

[0025] Alternatively, the exhaust sidewall includes a first arc-shaped segment and a second arc-shaped segment, the first arc-shaped segment transitionally connecting the inner wall of the mounting hole and the second arc-shaped segment, the second arc-shaped segment transitionally connecting the exhaust bottom wall, the first arc-shaped segment protruding towards the inner side of the mounting hole and opposite to the arc-shaped orientation of the second arc-shaped segment.

[0026] This avoids sharp edges at the connection between the exhaust groove and the mounting hole, prevents burrs from being generated by friction between the moving iron core and the coil frame during movement, and guides the flow of compressed gas.

[0027] In one embodiment of this application, the exhaust groove and the coil frame are integrally injection molded.

[0028] This reduces the difficulty of machining the exhaust channels and lowers the cost of the parts.

[0029] In one embodiment of this application, the stationary iron core has a mating protrusion on the side facing the moving iron core, and the moving iron core has a mating groove on the side facing the stationary iron core;

[0030] When the moving iron core moves along the height direction, the mating groove can cover or detach from the mating protrusion, so that the moving iron core can be attracted to or separated from the stationary iron core.

[0031] Thus, the combination of protrusions and grooves can reduce the magnetic gap between the moving iron core and the stationary iron core, increase the initial attraction between the moving iron core and the stationary iron core, and facilitate the attraction between the moving iron core and the stationary iron core.

[0032] In one embodiment of this application, the moving iron core portion exposes the coil frame;

[0033] And / or, the magnetic circuit structure further includes a magnet, which is disposed in the mounting hole and located on the side of the stationary iron core away from the moving iron core;

[0034] And / or, the magnetic circuit structure further includes a yoke and a mounting plate, the mounting plate being disposed on the yoke and forming an installation space with the yoke, the coil frame being disposed in the installation space, and the moving iron core passing through the mounting plate to extend out of the installation space.

[0035] In this way, the magnet can provide initial attraction to the moving iron core, which facilitates the attraction between the moving iron core and the stationary iron core. At the same time, it can make the moving iron core attract to the stationary iron core under the attraction of the magnetic field.

[0036] A relay includes a connection assembly, a contact assembly, and a magnetic circuit structure as described in any of the above technical features;

[0037] The connecting component is disposed at one end of the moving iron core extending out of the coil frame in the magnetic circuit structure. The contact component includes a moving contact and a stationary contact. The moving contact is disposed in the connecting component. The stationary contact and the moving contact are arranged opposite to each other along the height direction.

[0038] The moving iron core can drive the connecting component and the moving contact to move along the height direction, so that the moving contact can contact or separate from the stationary contact.

[0039] By adopting the above-mentioned magnetic circuit structure, the moving iron core can be accurately attracted to the stationary iron core, thereby improving the reliability of the relay operation. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the magnetic circuit structure according to an embodiment of this application.

[0041] Figure 2 for Figure 1 The diagram shows a magnetic circuit structure applied to a relay.

[0042] Figure 3 for Figure 2 The diagram shown is an exploded view of the relay.

[0043] Figure 4 for Figure 1 The cross-sectional view of the magnetic circuit structure shown.

[0044] Figure 5 for Figure 4 The magnetic circuit structure shown is a cross-sectional view at point AA.

[0045] Figure 6 for Figure 5 The magnetic circuit structure shown is a magnified view at point B.

[0046] Figure 7 for Figure 4 The diagram shows the moving iron core and the stationary iron core in the magnetic circuit structure.

[0047] Wherein: 10, relay; 100, magnetic circuit structure; 110, coil frame; 111, mounting hole; 112, exhaust groove; 1121, exhaust bottom wall; 1122, exhaust side wall; 11221, first arc segment; 11222, second arc segment; 120, stationary iron core; 121, mating protrusion; 1211, guide part; 130, moving iron core; 131, mating groove; 1311, guide groove; 140, coil; 150, elastic element; 160, magnet; 170, yoke; 180, mounting plate; 200, connecting assembly; 300, contact assembly; 310, moving contact; 320, stationary contact; 400, base plate; 500, lead-out terminal. Detailed Implementation

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] A relay is an electronic control device. Typically, a relay includes at least a moving iron core, a stationary iron core, a spring element, a moving contact, and a stationary contact. The moving and stationary iron cores can separate or engage to control the contact or separation of the moving and stationary contacts, thereby achieving the relay's closing or opening control. Currently, when the moving iron core moves towards the stationary iron core, there are problems with long engagement time and displacement of the moving iron core, affecting the engagement and return times of the moving and stationary iron cores.

[0055] For this purpose, please refer to Figures 1 to 3 This application provides a magnetic circuit structure 100. The magnetic circuit structure 100 is applied in a relay 10 to control the closing or opening of the relay 10. Figure 1 This is a schematic diagram of a magnetic circuit structure 100 according to an embodiment of this application. Figure 2 for Figure 1 The diagram shown illustrates the application of the magnetic circuit structure 100 to the relay 10. Figure 3 for Figure 2 An exploded view of relay 10 is shown.

[0056] To better illustrate the specific structure of the magnetic circuit structure 100, the structure of the relay 10 will be briefly introduced here. (See also...) Figures 1 to 3 The relay 10 includes at least a connection component 200, a contact component 300, and a magnetic circuit structure 100 as described in this application. The magnetic circuit structure 100 is the power source for the relay 10, and its output terminal is connected to the connection component 200, enabling the connection component 200 to move along the height direction.

[0057] This application is based on Figures 1 to 3 The indicated height direction (vertical, top-bottom, axial) is used as a reference, and this height direction also applies to all components of relay 10, which will not be described again later. The contact assembly 300 includes a moving contact 310 and a stationary contact 320. The stationary contact 320 and the moving contact 310 are arranged opposite each other along the height direction, and the stationary contact 320 is located above the moving contact 310. The moving contact 310 is disposed on the connecting assembly 200 and can move with the connecting assembly 200.

[0058] In this way, the magnetic circuit structure 100 can drive the connecting assembly 200 to move the moving contact 310 closer to or further away from the stationary contact 320 along the height direction, so that the moving contact 310 contacts or separates from the stationary contact 320, thereby closing or opening the relay 10. When the magnetic circuit structure 100 drives the connecting assembly 200 to move the moving contact 310 upward along the height direction, the moving contact 310 contacts the stationary contact 320, and the relay 10 closes to form a conductive path. When the magnetic circuit structure 100 drives the connecting assembly 200 to move the moving contact 310 downward along the height direction, the moving contact 310 separates from the stationary contact 320, and the relay 10 opens to form an open circuit.

[0059] In one embodiment, the relay 10 further includes a base plate 400 and a lead-out terminal 500. The stationary contact 320 is fixedly mounted on the base plate 400, and the lead-out terminal 500 is connected to the base plate 400 and electrically connected to the stationary contact 320. The lead-out terminal 500 can be connected to an external wire to connect the relay 10 to a circuit.

[0060] It is worth noting that the focus of this application is on the magnetic circuit structure 100. Other structures and working principles of the relay 10 are not the focus of this application and will not be described further below. The following describes the specific structure of the magnetic circuit structure 100 in some embodiments.

[0061] In the magnetic circuit structure 100 of this application, the compressed gas generated when the moving iron core 130 moves toward the stationary iron core 120 can be quickly discharged, avoiding obstruction of the movement of the moving iron core 130 by the compressed gas, thereby preventing the moving iron core 130 from getting stuck during the movement, ensuring the stability of the moving iron core 130's movement along the height direction, so that the moving iron core 130 can accurately engage with the stationary iron core 120, and shortening the engagement time and return time of the moving iron core 130 and the stationary iron core 120, thereby improving the reliability of the relay 10.

[0062] See Figures 1 to 6 In one embodiment, the magnetic circuit structure 100 includes a coil frame 110, a moving iron core 130, and a stationary iron core 120. The coil frame 110 has a mounting hole 111 and an exhaust groove 112. The mounting hole 111 extends through the coil frame along its height, and the exhaust groove 112 is disposed on the inner wall of the mounting hole 111. The stationary iron core 120 is disposed on the coil frame 110 and located in the mounting hole 111. The moving iron core 130 is movably mounted through the mounting hole 111.

[0063] The moving iron core 130 and the stationary iron core 120 are arranged relative to each other at the same height. The compressed gas generated when the moving iron core 130 moves toward the stationary iron core 120 can be discharged through the exhaust groove 112. Figure 4 for Figure 1 The cross-sectional view of the magnetic circuit structure 100 shown is as follows. Figure 5 for Figure 4 The cross-sectional view of the magnetic circuit structure 100 shown at point AA. Figure 6 for Figure 5 A magnified view of the magnetic circuit structure 100 at point B.

[0064] The coil frame 110 serves as the framework for the magnetic circuit structure 100, supporting and mounting the moving iron core 130 and the stationary iron core 120. The coil frame 110 extends along its height and has mounting holes 111 that extend through it. The stationary iron core 120 is fixedly mounted in the mounting holes 111 of the coil frame 110, and the moving iron core 130 is partially mounted in the mounting holes 111 of the coil frame 110. The stationary iron core 120 and the moving iron core 130 are positioned opposite each other along their height, with the moving iron core 130 positioned above the stationary iron core 120.

[0065] The moving iron core 130 is movably mounted in the mounting hole 111. The moving iron core 130 can move along the height direction in the mounting hole 111 to approach or move away from the stationary iron core 120. When the moving iron core 130 approaches the stationary iron core 120 along the height direction, the moving iron core 130 descends along the height direction in the mounting hole 111. When the moving iron core 130 contacts the stationary iron core 120, the moving iron core 130 and the stationary iron core 120 are attracted together. Moreover, when the moving iron core 130 descends, it can drive the connecting assembly 200 to separate the moving contact 310 from the stationary contact 320, thereby realizing the disconnection control of the relay 10.

[0066] As the moving iron core 130 moves away from the stationary iron core 120 along the height direction, the moving iron core 130 rises along the height direction in the mounting hole 111, and the moving iron core 130 and the stationary iron core 120 gradually move away from each other until they are completely separated. Moreover, when the moving iron core 130 rises, it can drive the connecting assembly 200 to make the moving contact 310 contact with the stationary contact 320, thereby realizing the closing control of the relay 10.

[0067] In its initial state, the moving iron core 130 of the relay 10 is separated from the stationary iron core 120, and the moving contact 310 and the stationary contact 320 are in a closed state. The initial position of the moving iron core 130 is that it is separated from the stationary iron core 120, meaning the relay 10 remains closed. When it is necessary to control the relay 10 to open, the moving iron core 130 moves towards the stationary iron core 120 under the magnetic force of the magnetic field, moving to the engaging position, causing the moving iron core 130 to engage with the stationary iron core 120, thereby controlling the moving contact 310 to open with the stationary contact 320, thus achieving the disconnection control of the relay 10.

[0068] In the past, when the moving iron core 130 moved towards the stationary iron core 120, the distance between the moving iron core 130 and the stationary iron core 120 decreased. At this time, the moving iron core 130 compressed the air between itself and the stationary iron core 120, forming compressed gas. The accumulation of this compressed gas between the moving iron core 130 and the stationary iron core 120 would create resistance to the movement of the moving iron core 130, preventing it from moving towards the stationary iron core 120, thus causing the movement of the moving iron core 130 to become stuck.

[0069] See Figure 5 and Figure 6 To address this, this application provides an exhaust groove 112 on the coil frame 110. The exhaust groove 112 is located on the inner wall of the mounting hole 111 and connects to the space between the moving iron core 130 and the stationary iron core 120. When the moving iron core 130 moves toward the stationary iron core 120, it compresses the air between itself and the stationary iron core 120, forming compressed gas. This compressed gas has a certain fluidity and can enter the exhaust groove 112, where it is then quickly discharged.

[0070] In this way, after the exhaust groove 112 quickly discharges the compressed gas between the moving iron core 130 and the stationary iron core 120, it can reduce the amount of compressed gas between the moving iron core 130 and the stationary iron core 120. As a result, the compressed gas will not obstruct the movement of the moving iron core 130, and will prevent the moving iron core 130 from getting stuck during its movement toward the stationary iron core 120, thus ensuring that the moving iron core 130 can move smoothly in the mounting hole 111 of the coil frame 110.

[0071] In the magnetic circuit structure 100 of the above embodiment, an exhaust groove 112 is provided on the coil frame 110. The compressed gas generated when the moving iron core 130 moves toward the stationary iron core 120 is quickly discharged through the exhaust groove 112, so as to avoid the compressed gas from obstructing the movement of the moving iron core 130 and thus avoid the moving iron core 130 from getting stuck during the movement. This ensures the stability of the moving iron core 130 in the height direction, so that the moving iron core 130 can accurately engage with the stationary iron core 120, and shortens the engagement time and return time of the moving iron core 130 and the stationary iron core 120, thereby improving the reliability of the relay 10.

[0072] Meanwhile, by providing an exhaust groove 112 on the inner wall of the mounting hole 111 of the coil frame 110, the distance between the outer surface of the moving iron core 130 and the inner wall of the mounting hole 111 can be reduced, so that the inner wall of the mounting hole 111 can guide the movement of the moving iron core 130, prevent the moving iron core 130 from shifting in the height direction, prevent the moving iron core 130 and the stationary iron core 120 from generating foreign objects due to friction, and ensure that the moving iron core 130 and the stationary iron core 120 are accurately attracted or separated.

[0073] See Figures 1 to 5 In one embodiment, the moving iron core 130 partially protrudes from the coil frame 110. The moving iron core 130 passes through and extends out of the mounting hole 111 in the coil frame 110. Thus, the moving iron core 130 is partially located in the mounting hole 111 of the coil frame 110 and partially located outside the coil frame 110. The end of the moving iron core 130 located outside the coil frame 110 is connected to the connecting assembly 200. Moreover, the moving iron core 130 is movably mounted in the mounting hole 111, and the moving iron core 130 can move along the height direction in the mounting hole 111 to move closer to or further away from the stationary iron core 120.

[0074] See Figures 1 to 5 In one embodiment, the magnetic circuit structure 100 further includes a coil 140, which is wound and mounted on a coil frame 110. When energized, the coil 140 generates a magnetic field, driving the moving iron core 130 towards the stationary iron core 120, causing the moving iron core 130 to attract the stationary iron core 120. The coil 140 is the component of the magnetic circuit structure 100 that generates the magnetic field, thereby controlling the movement of the moving iron core 130.

[0075] Coil 140 is wound on coil frame 110. When coil 140 is energized, it generates a magnetic field that produces an attractive force, controlling the moving iron core 130 to descend along the height direction, so that the moving iron core 130 and the stationary iron core 120 are attracted together. When coil 140 is de-energized, the magnetic field disappears, and the moving iron core 130 is no longer subject to the magnetic field's attractive force. The moving iron core 130 can then rise along the height direction, separating from the stationary iron core 120.

[0076] It is worth noting that the working principle of coil 140 and moving iron core 130 can be achieved using current technology, and will not be elaborated here.

[0077] In one embodiment, the venting groove 112 and the coil frame 110 are integrally injection molded. This reduces the processing difficulty of the venting groove 112 and lowers the cost of the parts.

[0078] See Figure 5 and Figure 6 In one embodiment, the venting groove 112 extends through the coil frame 110 along the height direction. That is, the height dimension of the venting groove 112 is equal to the height dimension of the coil frame 110. The venting groove 112 is axially disposed on the inner wall of the mounting hole 111, and the two ends of the venting groove 112 extend through the two ends of the coil frame 110 respectively.

[0079] In this way, the compressed gas generated by the movement of the moving iron core 130 toward the stationary iron core 120 can enter the exhaust groove 112. The compressed gas flows in the exhaust groove 112 and can be quickly discharged through the mounting holes 111 at both ends of the exhaust groove 112, so as to achieve effective discharge of the compressed gas and avoid the accumulation of compressed gas between the moving iron core 130 and the stationary iron core 120.

[0080] Meanwhile, when the coil frame 110 is demolded after molding, the venting groove 112 is provided through the inner wall of the mounting hole 111 of the coil frame 110 along the height direction. The venting groove 112 will not obstruct the mold, so that the coil frame 110 can be smoothly removed from the mold, which facilitates the demolding of the coil frame 110.

[0081] Of course, in other embodiments of this application, the venting groove 112 extends through to one end of the coil frame 110 along the height direction. That is, the top end of the venting groove 112 can extend through to the top of the coil frame 110, or the bottom end of the venting groove 112 can extend through to the bottom of the coil frame 110.

[0082] In this way, the compressed gas generated by the movement of the moving iron core 130 toward the stationary iron core 120 can enter the exhaust groove 112, flow in the exhaust groove 112, and be quickly discharged through one end of the exhaust groove 112. Moreover, the demolding direction of the coil frame 110 can be changed when the coil frame 110 is demolded, or the exhaust groove 112 can be made separately on the coil frame 110 after it is formed.

[0083] See Figure 5 and Figure 6 In one embodiment, there are multiple exhaust grooves 112, which are spaced apart circumferentially along the mounting hole 111. That is, multiple exhaust grooves 112 are provided on the inner wall of the mounting hole 111, and the multiple exhaust grooves 112 are spaced apart, so that the compressed gas can be smoothly discharged through the multiple exhaust grooves 112.

[0084] Understandably, if only one exhaust groove 112 is provided, the compressed gas will be discharged slowly or even not at all. Therefore, this application provides multiple exhaust grooves 112 on the inner wall of the mounting hole 111, and the multiple exhaust grooves 112 can form an exhaust circuit.

[0085] After the moving iron core 130 moves toward the stationary iron core 120 and generates compressed gas, the compressed gas can flow downward along one of the exhaust grooves 112 and then to another exhaust groove 112, where it is quickly discharged. In this way, an exhaust circuit can be formed between the multiple exhaust grooves 112, which facilitates the rapid discharge of compressed gas between the moving iron core 130 and the stationary iron core 120.

[0086] See Figure 5 and Figure 6 In one embodiment, multiple exhaust grooves 112 are evenly distributed on the inner wall of the mounting hole 111. That is, the circumferential distance between two adjacent exhaust grooves 112 is equal. In this way, the compressed gas generated by the movement of the moving iron core 130 toward the stationary iron core 120 can enter each exhaust groove 112 evenly.

[0087] Of course, in other embodiments of this application, the multiple exhaust grooves 112 may also be non-uniformly distributed on the inner wall of the mounting hole 111. That is, the circumferential distance between two adjacent exhaust grooves 112 may be unequal, as long as the multiple exhaust grooves 112 can quickly discharge compressed gas between the moving iron core 130 and the stationary iron core 120.

[0088] See Figure 5 and Figure 6 In this embodiment, there are two exhaust grooves 112, which are arranged radially opposite to each other along the mounting hole 111. Figure 5In the design, there are two exhaust grooves 112, which are evenly distributed. The two exhaust grooves 112 can form an exhaust circuit to quickly discharge the compressed gas between the moving iron core 130 and the stationary iron core 120, so as to avoid the compressed gas from obstructing the movement of the moving iron core 130 and thus prevent the moving iron core 130 from getting stuck during the movement.

[0089] See Figure 5 and Figure 6 In one embodiment, the exhaust groove 112 includes an exhaust bottom wall 1121 and opposing exhaust side walls 1122. The exhaust bottom wall 1121 is recessed into the inner wall of the mounting hole 111. The two exhaust side walls 1122 are arranged opposite each other on both sides of the exhaust bottom wall 1121 along the circumferential direction of the mounting hole 111, and together with the exhaust bottom wall 1121, they form the exhaust groove 112.

[0090] The exhaust bottom wall 1121 extends along the axial and circumferential directions of the mounting hole 111, and has a certain height and width. There are two exhaust side walls 1122, which are arranged opposite each other on both sides of the exhaust bottom wall 1121 along the circumferential direction of the mounting hole 111, and the exhaust side walls 1122 extend approximately along the radial direction of the mounting hole 111.

[0091] In this way, the exhaust bottom wall 1121 and the two exhaust side walls 1122 can form a recessed exhaust groove 112, which is recessed into the inner wall of the mounting hole 111. The exhaust bottom wall 1121 and the exhaust side walls 1122 can guide the compressed gas. When the compressed gas enters the exhaust groove 112, the compressed gas can flow along the exhaust bottom wall 1121 and the exhaust side walls 1122, realizing the rapid discharge of the compressed gas.

[0092] See Figure 5 and Figure 6 In one embodiment, the cross-sectional shape of the exhaust bottom wall 1121 is arc-shaped. That is, the surface of the exhaust bottom wall 1121 is arc-shaped. The arc-shaped exhaust bottom wall 1121 can guide the compressed gas, facilitating the rapid discharge of the compressed gas between the moving iron core 130 and the stationary iron core 120.

[0093] Of course, in other embodiments of this application, the cross-sectional shape of the exhaust bottom wall 1121 may also be linear. The linear exhaust bottom wall 1121 guides the compressed gas, facilitating the rapid discharge of the compressed gas between the moving iron core 130 and the stationary iron core 120.

[0094] See Figure 5 and Figure 6In one embodiment, the exhaust sidewall 1122 includes a first arcuate segment 11221 and a second arcuate segment 11222. The first arcuate segment 11221 transitions between the inner wall of the mounting hole 111 and the second arcuate segment 11222. The second arcuate segment 11222 transitions between the exhaust bottom wall 1121. The first arcuate segment 11221 protrudes towards the inner side of the mounting hole 111 and is opposite to the arcuate orientation of the second arcuate segment 11222.

[0095] The first arc-shaped segment 11221 protrudes towards the inner side of the mounting hole 111 and smoothly transitions to connect the inner wall of the mounting hole 111 with the second arc-shaped segment 11222. The second arc-shaped segment 11222 protrudes towards the outer side of the mounting hole 111 and smoothly transitions to connect the first arc-shaped segment 11221 with the exhaust bottom wall 1121, so that the exhaust groove 112 forms a chamfered arc-shaped structure.

[0096] In this way, the first arc segment 11221 and the second arc segment 11222 can avoid the appearance of sharp edges at the connection between the exhaust groove 112 and the mounting hole 111, thereby preventing the moving iron core 130 from rubbing against the coil frame 110 and generating burrs during the movement, so as not to affect the smooth movement of the moving iron core 130 in the mounting hole 111. At the same time, it can also guide the compressed gas into the exhaust groove 112.

[0097] Of course, in other embodiments of this application, the exhaust sidewall 1122 is an arc-shaped surface or an inclined surface, and is transitionally connected to the exhaust bottom wall 1121. That is, an arc-shaped surface or an inclined surface can be used to transitionally connect the inner wall of the mounting hole 111 to the bottom wall of the exhaust groove 112, preventing the moving iron core 130 from rubbing against the coil frame 110 during movement and generating burrs, so as not to affect the smooth movement of the moving iron core 130 in the mounting hole 111.

[0098] See Figure 3 , Figure 4 and Figure 7 In one embodiment, the stationary iron core 120 has a mating protrusion 121 on the side facing the moving iron core 130, and the moving iron core 130 has a mating groove 131 on the side facing the stationary iron core 120. When the moving iron core 130 moves along the height direction, the mating groove 131 can cover or disengage from the mating protrusion 121, so that the moving iron core 130 and the stationary iron core 120 are attracted to or separated. Figure 7 for Figure 4 A schematic diagram of the moving iron core 130 and the stationary iron core 120 in the magnetic circuit structure 100 shown.

[0099] A mating protrusion 121 is provided at the end of the stationary iron core 120 facing the moving iron core 130, and a mating groove 131 is provided at the end of the moving iron core 130 facing the stationary iron core 120. That is, the mating protrusion 121 is provided above the stationary iron core 120, and the mating groove 131 is provided below the moving iron core 130, with the mating protrusion 121 and the mating groove 131 correspondingly provided. When the moving iron core 130 and the stationary iron core 120 are attracted or separated, the mating groove 131 can cover or detach from the mating protrusion 121.

[0100] When the moving iron core 130 is in its initial position, the mating groove 131 and the mating protrusion 121 separate. At this time, the mating protrusion 121 is close to the mating moving iron core 130 to reduce the magnetic gap when the moving iron core 130 and the stationary iron core 120 separate. In this way, after the moving iron core 130 is attracted by the magnetic field, the magnetic gap between the moving iron core 130 and the stationary iron core 120 is small, which can reduce the leakage magnetic field between the moving iron core 130 and the stationary iron core 120, thereby increasing the initial attraction when the moving iron core 130 and the stationary iron core 120 close, which facilitates the engagement of the moving iron core 130 and the stationary iron core 120, thereby shortening the operating time of the relay 10 and reducing the energy consumption of the relay 10.

[0101] When the moving iron core 130 moves closer to or further away from the stationary iron core 120 along the height direction, the mating groove 131 can move along the mating protrusion 121. The mating protrusion 121 and the mating groove 131 guide the movement of the moving iron core 130, so that the moving iron core 130 can move accurately in the mounting hole 111 along the height direction, avoiding the movement of the moving iron core 130 in the mounting hole 111 and minimizing the friction between the moving iron core 130 and the inner wall of the mounting hole 111. This also avoids wear between the moving iron core 130 and the coil frame 110, ensuring the accuracy of the movement of the moving iron core 130.

[0102] See Figure 4 and Figure 7 In one embodiment, the end of the mating protrusion 121 facing the moving iron core 130 has a guide portion 1211, and the side of the mating groove 131 facing the stationary iron core 120 has a guide groove 1311. The guide groove 1311 and the guide portion 1211 are guided to fit together so as to guide the mating protrusion 121 to be installed in the mating groove 131.

[0103] The guide portion 1211 is located at the top of the mating protrusion 121, and the guide groove 1311 is located at the bottom of the mating groove 131. When the moving iron core 130 descends along the height direction, the guide portion 1211 at the top of the mating protrusion 121 can first be inserted into the guide groove 1311 at the bottom of the mating groove 131. The engagement of the guide groove 1311 and the guide portion 1211 facilitates the insertion of the mating protrusion 121 into the mating groove 131.

[0104] As the moving iron core 130 continues to descend, the guide groove 1311 guides the guide part 1211 so that the mating protrusion 121 gradually moves into the mating groove 131, ensuring the accuracy of the mating protrusion 121 and the mating groove 131, and realizing the accurate attraction between the moving iron core 130 and the stationary iron core 120.

[0105] In this embodiment, the guide portion 1211 is tapered, and its outer peripheral surface is an inclined or arc-shaped surface. The guide groove 1311 is a flared groove to facilitate the guide portion 1211 moving into the guide groove 1311. Of course, in other embodiments of this application, the guide portion 1211 and the guide groove 1311 may also be other structural forms that facilitate the mating of the protrusion 121 and the mating groove 131.

[0106] See Figure 4 In one embodiment, the magnetic circuit structure 100 includes an elastic element 150, which is sleeved on the stationary iron core 120 and located in the mounting hole 111. The elastic element 150 can also abut against the moving iron core 130, and the elastic force of the elastic element 150 can separate the moving iron core 130 from the stationary iron core 120. The elastic element 150 is installed between the moving iron core 130 and the stationary iron core 120, and the movement stroke of the moving iron core 130 is controllable through the elastic element 150. Optionally, the elastic element 150 is a spring.

[0107] The elastic element 150 is located in the mounting hole 111 and is fitted onto the stationary iron core 120. Under the attraction of the magnetic field, the moving iron core 130 can overcome the elastic force of the elastic element 150, and the moving iron core 130 can compress the elastic element 150 and move towards the stationary iron core 120, thus attracting the moving iron core 130 to the stationary iron core 120. After a reverse voltage is applied to both ends of the coil 140, the coil 140 can generate a reverse magnetic field. Under the combined action of the elastic force of the elastic element 150 and the reverse magnetic field, the moving iron core 130 can be pushed up in the mounting hole 111, so that the moving iron core 130 can return to its initial position and separate from the stationary iron core 120.

[0108] Thus, this application provides an elastic element 150 in the mounting hole 111 of the coil frame 110, and the elastic element 150 is located between the moving iron core 130 and the stationary iron core 120. When the moving iron core 130 and the stationary iron core 120 are attracted together, the moving iron core 130 can compress the elastic element 150. When the moving iron core 130 and the stationary iron core 120 are separated, the elastic element 150 and the reverse magnetic field work together to push the moving iron core 130 to reset, so that the movement stroke of the moving iron core 130 can be controlled, and the height of the entire magnetic circuit structure 100 is reduced, so that the moving iron core 130 can accurately separate from the stationary iron core 120 when it returns to the initial position.

[0109] See Figure 3 and Figure 4In one embodiment, the magnetic circuit structure 100 further includes a magnet 160, which is disposed in the mounting hole 111 and located on the side of the stationary iron core 120 opposite to the moving iron core 130. The magnet 160 is mounted on the inner wall of the coil frame 110 and located at the bottom of the stationary iron core 120. The magnet 160 can generate an attractive force, providing an initial attractive force for the moving iron core 130, thereby increasing the initial attractive force of the relay 10, reducing the energy consumption when the moving iron core 130 and the stationary iron core 120 are engaged, facilitating the engagement of the moving iron core 130 and the stationary iron core 120, and shortening the operating time and release time of the relay 10.

[0110] See Figures 1 to 4 In one embodiment, the magnetic circuit structure 100 further includes a yoke 170 and a mounting plate 180. The mounting plate 180 is disposed on the yoke 170 and together with the yoke 170 forms an installation space. The coil frame 110 is disposed in the installation space, and the moving iron core 130 passes through the mounting plate 180 to extend out of the installation space. The yoke 170 is U-shaped, and the coil frame 110 is disposed within the yoke 170. The mounting plate 180 is disposed at the U-shaped opening of the yoke 170, and supports the components above the magnetic circuit structure 100 through the mounting plate 180.

[0111] After the coil 140 is energized, the yoke 170, mounting plate 180, moving iron core 130 and magnet 160 can form a low magnetic resistance channel, allowing magnetic flux to start from the moving iron core 130, pass through the yoke 170, then through the working air gap, and finally return to the moving iron core 130, forming a complete magnetic circuit, so that the moving iron core 130 can be attracted to the stationary iron core 120 under the attraction of the magnetic field.

[0112] In the magnetic circuit structure 100 of this application, an exhaust groove 112 is provided on the inner wall of the mounting hole 111. In this way, the compressed gas generated when the moving iron core 130 moves toward the stationary iron core 120 can be quickly discharged through the exhaust groove 112, avoiding the compressed gas from obstructing the movement of the moving iron core 130, thereby preventing the moving iron core 130 from getting stuck during the movement, ensuring the stability of the moving iron core 130's movement along the height direction, so that the moving iron core 130 can accurately engage with the stationary iron core 120, and shortening the engagement time and return time of the moving iron core 130 and the stationary iron core 120, thereby improving the reliability of the relay 10.

[0113] Furthermore, in the magnetic circuit structure 100, the moving iron core 130 and the stationary iron core 120 are engaged by the mating groove 131 and the mating protrusion 121. This reduces the magnetic gap when the moving iron core 130 and the stationary iron core 120 are separated, thereby increasing the initial attraction when the moving iron core 130 and the stationary iron core 120 are closed, and shortening the operating time of the relay 10.

[0114] Meanwhile, when the moving iron core 130 approaches or moves away from the stationary iron core 120 along the height direction, the mating groove 131 can move along the mating protrusion 121 to guide the movement of the moving iron core 130, prevent the moving iron core 130 from tilting in the mounting hole 111, thereby preventing wear between the moving iron core 130 and the coil frame 110, ensuring the accuracy of the movement of the moving iron core 130, and improving the reliability of the relay 10.

[0115] See Figures 1 to 3 This application also provides a relay 10, including a connection assembly 200, a contact assembly 300, and a magnetic circuit structure 100 as described in any of the above embodiments. The connection assembly 200 is disposed at one end of the moving iron core 130 extending out of the coil frame 110 in the magnetic circuit structure 100. The contact assembly 300 includes a moving contact 310 and a stationary contact 320. The moving contact 310 is disposed in the connection assembly 200, and the stationary contact 320 and the moving contact 310 are arranged opposite each other along the height direction. The moving iron core 130 can drive the connection assembly 200 and the moving contact 310 to move along the height direction, so that the moving contact 310 contacts or separates from the stationary contact 320.

[0116] It is worth noting that the specific connection method between the connecting component 200 and the moving iron core 130 is not limited here. After the relay 10 of this application adopts the magnetic circuit structure 100 of the above embodiment, the compressed gas generated when the moving iron core 130 moves towards the stationary iron core 120 can be quickly discharged through the exhaust groove 112, preventing the moving iron core 130 from getting stuck during movement. This allows the moving iron core 130 to accurately engage with the stationary iron core 120, shortening the engagement time and return time between the moving iron core 130 and the stationary iron core 120, thereby improving the reliability of the relay 10.

[0117] 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.

[0118] 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 magnetic circuit structure, characterized by, include: A coil frame having a mounting hole and an exhaust groove, the mounting hole being disposed through the height direction, and the exhaust groove being disposed on the inner wall of the mounting hole; A stationary iron core is disposed on the coil frame and located in the mounting hole; A movable iron core is movably installed through the mounting hole, and the movable iron core and the stationary iron core are arranged relative to each other along the height. The compressed gas generated when the moving iron core moves toward the stationary iron core can be discharged through the exhaust groove.

2. The magnetic circuit structure according to claim 1, characterized in that, The exhaust groove extends through the coil frame along the height direction; Alternatively, the exhaust groove extends along the height direction to one end of the coil frame.

3. The magnetic circuit structure according to claim 1, characterized in that, The number of exhaust grooves is multiple, and the multiple exhaust grooves are arranged at intervals along the circumference of the mounting hole.

4. The magnetic circuit structure according to claim 3, characterized in that The number of exhaust grooves is two, and the two exhaust grooves are arranged radially opposite each other along the mounting hole.

5. The magnetic circuit structure according to any one of claims 1 to 4, characterized in that, The exhaust groove includes an exhaust bottom wall and opposing exhaust side walls. The exhaust bottom wall is recessed into the inner wall of the mounting hole. The two exhaust side walls are arranged opposite each other on both sides of the exhaust bottom wall along the circumference of the mounting hole, and together with the exhaust bottom wall, they form the exhaust groove.

6. The magnetic circuit structure according to claim 5, characterized in that, The cross-sectional shape of the exhaust bottom wall is either arc-shaped or straight.

7. The magnetic circuit structure according to claim 5, characterized in that, The exhaust sidewall is an arc-shaped or inclined surface and is transitionally connected to the exhaust bottom wall; Alternatively, the exhaust sidewall includes a first arc-shaped segment and a second arc-shaped segment, the first arc-shaped segment transitionally connecting the inner wall of the mounting hole and the second arc-shaped segment, the second arc-shaped segment transitionally connecting the exhaust bottom wall, the first arc-shaped segment protruding towards the inner side of the mounting hole and opposite to the arc-shaped orientation of the second arc-shaped segment.

8. The magnetic circuit structure according to any one of claims 1 to 4, characterized by The exhaust groove and the coil frame are integrally injection molded.

9. The magnetic circuit structure according to any one of claims 1 to 4, characterized by The stationary iron core has a mating protrusion on the side facing the moving iron core, and the moving iron core has a mating groove on the side facing the stationary iron core; When the moving iron core moves along the height direction, the mating groove can cover or detach from the mating protrusion, so that the moving iron core can be attracted to or separated from the stationary iron core.

10. The magnetic circuit structure according to any one of claims 1 to 4, characterized by The moving iron core portion exposes the coil frame; And / or, the magnetic circuit structure further includes a magnet, which is disposed in the mounting hole and located on the side of the stationary iron core away from the moving iron core; And / or, the magnetic circuit structure further includes a yoke and a mounting plate, the mounting plate being disposed on the yoke and forming an installation space with the yoke, the coil frame being disposed in the installation space, and the moving iron core passing through the mounting plate to extend out of the installation space.

11. A relay characterized by comprising: Includes a connection component, a contact component, and a magnetic circuit structure as described in any one of claims 1 to 10; The connecting component is disposed at one end of the moving iron core extending out of the coil frame in the magnetic circuit structure. The contact component includes a moving contact and a stationary contact. The moving contact is disposed in the connecting component. The stationary contact and the moving contact are arranged opposite to each other along the height direction. The moving iron core can drive the connecting component and the moving contact to move along the height direction, so that the moving contact can contact or separate from the stationary contact.

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