Moving contact for a relay and relay

Abstract

The application relates to a moving contact for a relay and the relay, the relay comprising a magnetic circuit part, a contact part and a magnetic conducting block, the magnetic circuit part being used for generating an electromagnetic force, the contact part comprising a push card, a static contact with a static contact point and a moving contact with a moving contact point, the moving contact comprising a moving spring piece, a compression spring and a magnetic conducting piece, the moving spring piece, one end of the compression spring and at least part of the magnetic conducting piece being stacked and fixedly connected with each other, the moving contact point being used for contacting the static contact point to form a conduction loop, the magnetic conducting piece being used for forming a magnetic loop with the magnetic conducting block when the conduction loop is formed, the magnetic loop enabling the magnetic conducting piece and the magnetic conducting block to be mutually adsorbed, so that when a load circuit generates a larger short-circuit current and causes both ends of the moving spring piece to have a tendency to be warped, the mutual adsorption of the magnetic conducting piece and the magnetic conducting block can prevent the moving spring piece from being warped, thereby avoiding the contact pressure between the moving and static contact points from being suddenly changed or even being disconnected, and effectively ensuring the stability of the relay in the on state.

Description

Technical Field

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

[0002] A relay is an electronic switch that connects and disconnects a load circuit. Among the many types of relays, the magnetic latching relay is a common one. It consists of a contact part and a magnetic circuit part. The contact part includes a moving spring with a moving contact, a stationary spring with a stationary contact, and an armature. The magnetic circuit part contains a coil. When a positive pulse voltage is applied to the coil, a positive magnetic field is generated. The armature drives the moving spring to swing, causing the moving contact to make contact with the stationary contact, thus connecting the external load circuit. When a reverse pulse voltage is applied to the coil, a reverse magnetic field is generated. The armature drives the moving spring to swing in the opposite direction, causing the moving contact to separate from the stationary contact, thus disconnecting the external load circuit.

[0003] However, when a short-circuit current is generated in the load circuit, the moving spring and the stationary spring attract each other. Due to the large short-circuit current, the two ends of the moving spring are prone to tilting up, which will drive the pressure spring to tilt up, and in turn, it will easily drive the push card to move, causing the contact pressure between the moving and stationary contacts to change suddenly or even break, resulting in an unstable relay connection state. Utility Model Content

[0004] Therefore, it is necessary to provide a moving contact for a relay and a relay including the moving contact to address the problem that the moving spring of an existing magnetic latching relay is prone to warping during operation, causing a sudden change in the contact pressure between the moving and stationary contacts or even disconnection.

[0005] According to one aspect of this application, a moving contact for a relay is provided, the moving contact comprising a moving spring, a compression spring, and a magnetic conductor, wherein the moving spring, one end of the compression spring, and at least a portion of the magnetic conductor are stacked and fixedly connected to each other, the moving spring has a moving contact for contacting a stationary contact on a stationary contact to form a conductive circuit, the magnetic conductor is used to form a magnetic circuit with a magnetic block when forming the conductive circuit, and one end of the compression spring away from the magnetic conductor is used to connect to a push card and is capable of elastic deformation under the drive of the push card.

[0006] In one embodiment, the movable spring has a first through hole, one end of the compression spring has a second through hole, and the magnetic conductor has a third through hole. The first through hole, the second through hole, and the third through hole are coaxially aligned and fasteners are inserted therein. The fasteners fix the movable spring, the compression spring, and the magnetic conductor into one unit.

[0007] In one embodiment, the movable spring has a first through hole, one end of the compression spring has a second through hole, and the magnetic conductor has a deformable part that passes through the first through hole and the second through hole and forms a fastener that fixes the movable spring, the compression spring and the magnetic conductor into one unit.

[0008] In one embodiment, the compression spring includes a fixed part and an elastic part. The fixed part is fixedly connected to the movable spring and the magnetic conductor. The elastic part is integrally connected to the fixed part and is set at an obtuse angle to the fixed part, so that the elastic part and the portion of the movable spring with the movable contact are set at an acute angle.

[0009] The end of the elastic part away from the fixed part is used to connect to the push card. When the push card pushes the compression spring, the elastic part can swing towards the moving spring and generate elastic deformation.

[0010] In one embodiment, the elastic portion includes a first elastic portion and a second elastic portion. One end of the first elastic portion is connected to the fixed portion, and the second elastic portion is connected to the end of the first elastic portion away from the fixed portion. The second elastic portion is bent relative to the first elastic portion in a direction closer to the moving contact, so as to be set at an obtuse angle with the first elastic portion.

[0011] In one embodiment, one end of the compression spring has a first hook and a second hook for connecting the push card, the first hook and the second hook being spaced apart to clamp the push card in the thickness direction.

[0012] In one embodiment, the first hook and / or the second hook have a chamfer at the position for contacting the push card.

[0013] In one embodiment, the magnetic conductor includes a body and side wings disposed on both sides of the body. The body and the side wings form a receiving cavity with an opening on one side. A portion of the moving spring is wrapped in the receiving cavity. When the moving contact is close to the stationary contact, the magnetic block closes the opening of the receiving cavity and forms the magnetic circuit with the magnetic conductor.

[0014] In one embodiment, the magnetic sheet further includes a protrusion connected to the body, the protrusion being stacked and fixedly connected to one end of the compression spring and the movable spring sheet.

[0015] In one embodiment, the body, one end of the compression spring, and the movable spring are stacked and fixedly connected to each other.

[0016] According to another aspect of this application, a relay is provided, comprising:

[0017] The magnetic circuit section is used to generate electromagnetic force;

[0018] The contact portion includes a push card, a stationary contact with a stationary contact point, and a moving contact as described in any of the above embodiments. The push card is connected to the compression spring of the moving contact and can swing under the drive of the electromagnetic force generated by the magnetic circuit portion to drive the moving contact on the moving contact to contact or separate from the stationary contact on the stationary contact.

[0019] A magnetically conductive block is used to form a magnetic circuit with the magnetically conductive element of the moving contact when the moving contact is in contact with the stationary contact and conducts electricity.

[0020] In one embodiment, the relay further includes a housing with an inner wall having a mounting groove, a portion of the magnetic block being embedded in the mounting groove and another portion being exposed in the mounting groove to form a magnetic circuit with the magnetic component.

[0021] The aforementioned moving contact and relay, by incorporating a magnetic element connected to a moving spring in the moving contact, allow the magnetic element to form a magnetic circuit with a magnetic block when the moving contact on the moving spring contacts the stationary contact on the stationary spring. This magnetic circuit enables the magnetic element and the magnetic block to attract each other. Therefore, when a large short-circuit current is generated in the load circuit, causing the two ends of the moving spring to tend to tilt upwards, the mutual attraction between the magnetic element and the magnetic block can prevent the moving spring from tilting upwards, thereby avoiding sudden changes or even disconnection of the contact pressure between the moving and stationary contacts, effectively ensuring the stability of the relay's on state. Attached Figure Description

[0022] Figure 1 This is an axonometric view of a relay provided in an embodiment of this application.

[0023] Figure 2 Schematic diagram of the internal structure of a relay provided in an embodiment of this application Figure 1 (The shell was hidden).

[0024] Figure 3 Schematic diagram of the internal structure of a relay provided in an embodiment of this application Figure 2 (The shell was hidden).

[0025] Figure 4 A front view of a relay provided in an embodiment of this application.

[0026] Figure 5 A front view of a relay provided in an embodiment of this application (housing is hidden).

[0027] Figure 6This is an axial view of the connection between the push card and the moving contact in a relay provided in an embodiment of this application.

[0028] Figure 7 This is a front view of the connection between the push card and the moving contact in a relay provided in an embodiment of this application.

[0029] Figure 8 for Figure 7 An enlarged schematic diagram of region A in the middle.

[0030] Figure 9 This is an axial view of a moving spring in a moving contact element provided in an embodiment of this application.

[0031] Figure 10 for Figure 9 A magnified view of region B in the middle.

[0032] Figure 11 This is an axial view of the magnetic conductor in a moving contact provided in an embodiment of this application.

[0033] Figure 12 for Figure 4 A magnified view of region C in the middle.

[0034] Explanation of reference numerals in the attached figures:

[0035] 10. Relay; 100. Housing; 101. Mounting slot; 200. Magnetic circuit part; 210. Coil frame; 220. Coil; 230. Pin; 240. Armature assembly; 241. Armature; 242. Push clip; 300. Contact part; 310. Contact assembly; 310a. First lead-out terminal; 310b. Second lead-out terminal; 311. Moving contact; 311a. Fixed end; 311b. Contact end; 3111. Moving spring; 3112. Compression spring; 3112a. Fixed part ; 3112b, elastic part; 3112c, first elastic part; 3112d, second elastic part; 3112e, first hook; 3112f, second hook; 3112g, chamfer; 3113, magnetic conductor; 3113a, body; 3113b, side wing; 3113c, protrusion; 3113d, receiving cavity; 312, stationary contact; 3121, stationary spring; 313, moving contact; 314, stationary contact; 400, magnetic block; 410, mounting part; 420, magnetic conductor. Detailed Implementation

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] This application provides a moving contact for a relay and a relay including the moving contact. The relay is used in an automatic control circuit and plays a role in automatic adjustment, safety protection, and circuit switching. Specifically, it can be used to connect a load power supply and a load. By using the moving contact to contact or disconnect with the stationary contact in the relay, the on / off state of the load circuit formed by the load power supply and the load is controlled, thereby playing a role in protecting the load through circuit switching and automatic adjustment, and preventing the load from being damaged by excessive current.

[0043] The following description uses a magnetic latching relay used in an electricity meter as an example to illustrate the structure of the moving contact and 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 magnetic latching relays used in electricity meters; there are no particular limitations in this regard.

[0044] See Figures 1 to 4 , Figure 1 An axonometric view of a relay 10 according to an embodiment of this application is shown. Figure 2 , Figure 3 and Figure 4A schematic diagram 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 magnetic circuit portion 200, and a contact portion 300. The magnetic circuit portion 200 and the contact portion 300 are at least partially disposed within the housing 100, and are arranged adjacent to each other along a first direction (the X direction shown in the figure). The magnetic circuit portion 200 is used to provide electromagnetic force; the contact portion 300 is used to connect to a load circuit. Under the action of the electromagnetic force, the contact portion 300 can control the on / off state of the load circuit.

[0045] Specifically, in some embodiments, such as Figure 3 As shown, the magnetic circuit section 200 includes a coil frame 210 and a coil 220 wound on the coil frame 210. The coil frame 210 has several pins 230. One end of each pin 230 is connected to the coil 220, and the other end is used to connect to an external power source. Driven by electrical energy provided by the external power source, the coil 220 can be energized to generate a magnetic field, thereby producing electromagnetic force. The contact section 300 includes at least two sets of contact components 310. Providing at least two sets of contact components 310 can handle scenarios requiring the switching of multiple load circuits. Figures 1 to 4 In the embodiment, the contact assembly 310 has two sets, and the two sets of contact assemblies 310 are arranged side by side along a second direction perpendicular to the first direction (the Y direction shown in the figure). Each set of contact assemblies 310 includes a moving contact 311 with a moving contact 313 and a stationary contact 312 with a stationary contact 314, and as shown... Figure 4 As shown, each set of contact components 310 has a first lead-out terminal 310a and a second lead-out terminal 310b. One of the first lead-out terminal 310a and the second lead-out terminal 310b is used to connect to the input terminal of the load circuit, and the other is used to connect to the output terminal of the load circuit. When the coil 220 is energized, the moving contact 311 can swing in the second direction under the drive of the electromagnetic force generated by the magnetic circuit part 200, so that the moving contact 313 and the stationary contact 314 contact or separate. When the moving contact 313 and the stationary contact 314 contact, the first lead-out terminal 310a and the second lead-out terminal 310b are mutually conductive, so that a conductive load circuit can be formed. When the moving contact 313 and the stationary contact 314 separate, the first lead-out terminal 310a and the second lead-out terminal 310b are mutually disconnected, and the load circuit is disconnected.

[0046] More specifically, in the arrangement of the first lead-out end 310a and the second lead-out end 310b, in one embodiment, the first lead-out end 310a can be disposed on the stationary contact member 312, and the second lead-out end 310b can be disposed on the moving contact member 311, with the first lead-out end 310a and the second lead-out end 310b spaced apart along a second direction. When the moving contact member 311 swings along the first direction, the first lead-out end 310a and the second lead-out end 310b can be made to be connected or disconnected from each other.

[0047] In another embodiment, such as Figure 4 and Figure 5 As shown, the stationary contact 312 includes two stationary springs 3121. A first lead-out end 310a and a second lead-out end 310b are respectively disposed on one of the stationary springs 3121, and the first lead-out ends 310a and 310b are spaced apart along a third direction (Z direction shown in the figure) that is perpendicular to both the first and second directions. More specifically, in this embodiment, the moving contact 311 has a fixed end 311a and a contact end 311b disposed opposite to each other along the third direction. The fixed end 311a is fixedly connected to the first lead-out end 310a. A moving contact 313 is disposed on the contact end 311b, and a stationary contact 314 is disposed on the second lead-out end 310b. Under the drive of electromagnetic force, the contact end 311b can swing relative to the fixed end 311a along the second direction, so that the moving contact 313 and the stationary contact 314 come into contact or separate from each other.

[0048] As can be seen, through the design of the above embodiments, the magnetic circuit part 200 will not encroach on the swing space of the moving contact 311, allowing the moving contact 311 to swing along the first direction, thus providing a large swing space. Because the moving contact 311 has a large swing space, the stationary contact 314 and the moving contact 313 can maintain a sufficient distance in the separated state, thereby providing a large electrical clearance between the stationary contact 314 and the moving contact 313. This improves insulation performance, prevents short circuits, facilitates heat dissipation and maintenance, enhances anti-interference capabilities, and avoids malfunctions.

[0049] Furthermore, it can be observed that since the first lead-out terminal 310a and the second lead-out terminal 310b are spaced apart along a third direction, therefore... Figure 4 As shown, the first lead-out end 310a and the second lead-out end 310b are both located close to the shell wall of the housing 100. Therefore, the first lead-out end 310a and the second lead-out end 310b do not need to be extended too far to extend out of the housing 100 and connect to the wiring terminals on the meter housing, thereby saving the material used to manufacture the first lead-out end 310a and the second lead-out end 310b.

[0050] It is understood that the portions of the first lead-out end 310a and the second lead-out end 310b housed within the housing 100 can be either curved or planar, and there is no limitation on this. For example Figure 9 and Figure 10In one embodiment, the portion of the first lead-out end 310a housed in the housing 100 has a structure extending along a plane, and the portion of the second lead-out end 310b housed in the housing 100 has a curved extension structure. Alternatively, both the first lead-out end 310a and the second lead-out end 310b can extend along a plane. The structure extending along a plane can simplify the fabrication of the first lead-out end 310a and the second lead-out end 320b.

[0051] Regarding the structure of how the magnetic circuit part 200 drives the moving contact 311 to swing, such as... Figure 5 As shown, the magnetic circuit part 200 also includes an armature assembly 240. The contact end 311b of the moving contact 311 is connected to the armature assembly 240. When the coil 220 generates electromagnetic force, the armature assembly 240 can move under the drive of the electromagnetic force, so as to drive the contact end 311b of the moving contact 311 to swing.

[0052] Furthermore, the armature assembly 240 includes an armature 241 and a pusher 242 connected to each other. The pusher 242 is connected to the contact end 311b of the moving contact 311. When the coil 220 is energized to generate electromagnetic force, the armature 241 can rotate around a central axis extending in a first direction under the action of electromagnetic force, so as to drive the pusher 242 to move in a second direction.

[0053] See Figure 6 and Figure 7 , Figure 6 This paper shows an axial view of a moving contact 311 provided in one embodiment of the present application. Figure 7 The front view of the moving contact 311 of this embodiment is shown. In this embodiment, the moving contact 311 includes a moving spring 3111, a compression spring 3112 and a magnetic conductor 3113. One end of the moving spring 3111, the compression spring 3112 and at least part of the magnetic conductor 3113 are stacked and fixedly connected to each other.

[0054] Specifically, the moving contact 313 is disposed at one end of the moving spring 3111 to form the contact end 311b of the moving contact 311. The other end of the moving spring 3111 is connected to the first lead-out end 310a to form the fixed end 311a of the moving contact 311. One end of the compression spring 3112 is connected to the portion of the moving spring 3111 near the moving contact 313, and the other end of the compression spring 3112 is connected to the push card 242. When the push card 242 moves in the second direction toward the moving spring 3111, it can push the compression spring 3112 to produce elastic deformation. By setting the compression spring 3112, it is possible to ensure that the moving contact 313 has sufficient overtravel and that sufficient pressure is generated when the moving contact 313 and the stationary contact 314 are in contact, thus ensuring that the contact between the moving contact 313 and the stationary contact 314 remains stable.

[0055] For the magnetic conductive component 3113, combined with Figure 4 As shown, the inner wall of the housing 100 of the relay 10 is provided with a magnetic block 400 corresponding to the magnetic conductor 3113. When the moving contact 313 and the stationary contact 314 are in contact and conducting electricity, the magnetic conductor 3113 and the magnetic block 400 generate a magnetic circuit, so that the magnetic conductor 3113 and the magnetic block 400 tend to attract each other. By setting up the magnetic conductive element 3113 and the magnetic conductive block 400, the magnetic conductive element 3113 and the magnetic conductive block 400 can form a magnetic circuit and attract each other. Since the attraction force is opposite to the repulsive force between the moving contact 313 and the stationary contact 314, and at least a part of the magnetic conductive element 3113, one end of the compression spring 3112 and the moving spring 3111 are stacked and connected, when a large short-circuit current is generated in the load circuit, a part of the moving contact 311 is increased in overall thickness, which enhances the rigidity of the moving contact 311 and prevents the moving spring 3111 from tilting up. This prevents the moving contact 313 and the stationary contact 314 from generating a large repulsive force and separating, thus ensuring a stable contact state between the moving contact 313 and the stationary contact 314.

[0056] Preferably, the movable spring 3111, the compression spring 3112, and the magnetic conductor 3113 are fixedly connected as a whole by a fastener (not shown in the figure). Specifically, the movable spring 3111 has a first through hole (not shown in the figure), one end of the compression spring 3112 has a second through hole (not shown in the figure), and the magnetic conductor 3113 has a third through hole (not shown in the figure). The first, second, and third through holes are coaxially aligned, and the fastener is sequentially inserted through the third, second, and first through holes to fix the movable spring 3111, the compression spring 3112, and the magnetic conductor 3113 as a whole. This allows for the connection of the three components with only one fastener, simplifying the connection process. Optionally, the fastener is a rivet, which allows the movable spring 3111, the compression spring 3112, and the magnetic conductor 3113 to be riveted together. Of course, the fastener can also be other fasteners such as screws or bolts, and there is no limitation on this.

[0057] Optionally, the movable spring 3111, the compression spring 3112, and the magnetic conductor 3113 are fixedly connected as one unit by a riveting process. For example, but not limited to, the magnetic conductor 3113 is deformed by stamping to create a deformed part. The deformed part passes through the first through hole and the second through hole and forms a fastener that fixes the movable spring 3111, the compression spring 3112, and the magnetic conductor 3113 as one unit.

[0058] See Figure 8 and Figure 9The compression spring 3112 is formed by bending a sheet metal piece. It includes a fixed part 3112a and an elastic part 3112b. The fixed part 3112a forms one end of the compression spring 3112. A second through hole is opened on the fixed part 3112a, so that the fixed part 3112a is fixedly connected to the movable spring 3111 and the magnetic conductor 3113. The elastic part 3112b is integrally connected to the fixed part 3112a and is set at an obtuse angle with the fixed part 3112a, so that the elastic part 3112b and the part of the movable spring 3111 with the movable contact 313 are set at an acute angle. The end of the elastic part 3112b away from the fixed part 3112a is used to connect the push card 242. When the push card 242 pushes the compression spring 3112, the elastic part 3112b can swing towards the movable spring 3111 and generate elastic deformation.

[0059] Preferably, as an improvement to the above embodiment, the elastic portion 3112b is also bent, such that the elastic portion 3112b includes a first elastic portion 3112c and a second elastic portion 3112d integrally connected. One end of the first elastic portion 3112c is connected to the fixed portion 3112a, and one end of the second elastic portion 3112d is connected to the end of the first elastic portion 3112c away from the fixed portion 3112a. The second elastic portion 3112d is bent relative to the first elastic portion 3112c in a direction closer to the moving contact 313, so as to be set at an obtuse angle with the first elastic portion 3112c. With this design, when the elastic part 3112b is deformed under force, the deformation of the second elastic part 3112d is greater than that of the first elastic part 3112c. Preferably, the second elastic part 3112d deforms while the first elastic part 3112c does not deform or only deforms very little. This ensures that even when the second elastic part 3112d deforms to its maximum extent, a gap can be formed between the second elastic part 3112d and the end of the moving contact 313 facing the compression spring 3112. This gap ensures that when the moving contact 313 and the stationary contact 314 are in contact, it prevents the end of the second elastic part 3112d and the end of the moving contact 313 facing the compression spring 3112 from also coming into contact with each other, which would cause a sharp change in the reaction force characteristic curve of the relay 10, thereby causing problems such as unstable product performance and reduced reliability of the relay 10.

[0060] Furthermore, combined Figure 4 , Figure 6 and Figure 7 As shown, the thickness direction of the movable spring 3111 is parallel to the first direction; in other words, the width direction of the movable spring 3111 is parallel to the second direction. Here, "parallel" means that they are parallel or nearly parallel to each other. This arrangement is to utilize the larger space inside the housing 100 of the relay 10 in the second direction, allowing the movable spring 3111 to be designed with a wider width in the second direction, thus enabling it to... Figure 6As shown, two or more moving contacts 313 are provided on the moving spring 3111, and two or more stationary contacts 314 are also provided on the stationary contact 312. This increases the cross-sectional area of ​​the moving spring 3111 and enhances its current-conducting capacity. Therefore, when a large short-circuit current is generated in the load circuit, the moving spring 3111 can bear it, thereby ensuring the normal operation of the relay 10.

[0061] Furthermore, such as Figure 8 and Figure 9 As shown, the end of the compression spring 3112 connected to the push card 242, that is, the end of the elastic part 3112b away from the fixed part 3112a, has a first hook 3112e and a second hook 3112f. The first hook 3112e and the second hook 3112f are spaced apart so that the push card 242 can be clamped in the thickness direction of the push card 242, thereby realizing the connection between the compression spring 3112 and the push card 242.

[0062] It is worth noting that when the push card 242 moves along the second direction, the elastic part 3112b of the compression spring 3112 will rotate relative to the push card 242 at an angle. In order to avoid long-term relative friction between the first hook 3112e and the second hook 3112f and the push card 242, causing wear and scratches on the surface of the push card 242, such as... Figure 10 As shown, a chamfer 3112g is provided on the second hook 3112f at the position for contacting the push card 242. This can prevent the edge of the second hook 3112f from being too sharp and causing wear and scratches on the surface of the push card 242 during relative friction.

[0063] It is understandable that both the first hook 3112e and the second hook 3112f may have chamfered edges 3112g, or only the first hook 3112e or only the second hook 3112f may have chamfered edges 3112g; this is not limited here.

[0064] See Figure 11 , Figure 11 The diagram shows a schematic structural diagram of the magnetic conductive member 3113 provided in an embodiment of this application. Referring to the diagram, in this embodiment, the magnetic conductive member 3113 includes a body 3113a and side wings 3113b disposed on both sides of the body 3113a. The structure formed by the body 3113a and the side wings 3113b makes the cross-section of the magnetic conductive member 3113 U-shaped, thereby forming a receiving cavity 3113d with an opening on one side, whereby the body 3113a and the side wings 3113b enclose a receiving cavity 3113d. Figure 6 and Figure 7 As shown, the moving spring 3111 is partially enclosed in the receiving cavity 3113d. When the moving contact 313 and the stationary contact 314 approach each other, the magnetic block 400 closes the opening of the receiving cavity 3113d and forms a magnetic circuit with the magnetic conductor 3113.

[0065] Preferably, the magnetic conductive element 3113 further includes a protrusion 3113c connected to the body 3113a, and a third through hole is formed on the protrusion 3113c. The protrusion 3113c is used to be stacked and fixedly connected to the fixing part 3112a of the compression spring 3112 and the movable spring 3111. By providing the protrusion 3113c in the magnetic conductive element 3113, the lever arm for the movable spring 3111 to deform is further reduced, which can further prevent the movable spring 3111 from deforming when a large short-circuit current is generated in the load circuit.

[0066] In addition, in order to fix the magnetic block 400, combined with Figure 4 and Figure 12 As shown, the inner wall of the housing 100 has a mounting groove 101. A portion of the magnetic block 400 is embedded in the mounting groove 101, while another portion is exposed outside the mounting groove 101 to form a magnetic circuit with the magnetic conductor 3113. Specifically, the cross-section of the magnetic block 400 is I-shaped, comprising an interconnected mounting portion 410 and a magnetically conductive portion 420. The mounting portion 410 is embedded in the mounting groove 101, and the magnetically conductive portion 420 is exposed outside the mounting groove 101. Preferably, the mounting portion 410 and the magnetically conductive portion 420 are detachable from each other, so that the mounting portion 410 can be installed in or removed from the mounting groove 101.

[0067] Therefore, the moving contact 311 for the relay 10 and the relay 10 including the contact provided in this application increase the overall rigidity of the moving contact 311 by setting the magnetic block 400 in the moving contact 311. When the load circuit generates a large short-circuit current that causes the two ends of the moving spring 3111 to tend to lift, the magnetic component 3113 and the magnetic block 400 attract each other to prevent the moving spring 3111 from lifting. This can prevent the contact pressure between the moving and stationary contacts 314 from changing abruptly or even breaking, and effectively ensure the stability of the relay 10 in the connected state.

[0068] 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.

[0069] 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 moving contact for a relay, characterized in that, The moving contact includes a moving spring, a compression spring, and a magnetic conductor. The moving spring, one end of the compression spring, and at least a portion of the magnetic conductor are stacked and fixedly connected to each other. The moving spring has a moving contact point, which is used to contact a stationary contact point on a stationary contact to form a conductive circuit. The magnetic conductor is used to form a magnetic circuit with a magnetic block when the conductive circuit is formed. The end of the compression spring away from the magnetic conductor is used to connect to a push card and can generate elastic deformation under the drive of the push card.

2. The moving contact element according to claim 1, characterized in that, The movable spring has a first through hole, one end of the compression spring has a second through hole, and the magnetic conductor has a third through hole. The first through hole, the second through hole, and the third through hole are coaxially aligned and fasteners are inserted therein. The fasteners fix the movable spring, the compression spring, and the magnetic conductor into one unit.

3. The moving contact element according to claim 1, characterized in that, The movable spring has a first through hole, and one end of the compression spring has a second through hole. The magnetic conductor has a deformable part, which passes through the first through hole and the second through hole and forms a fastener that fixes the movable spring, the compression spring and the magnetic conductor into one unit.

4. The moving contact element according to claim 1, characterized in that, The compression spring includes a fixed part and an elastic part. The fixed part is fixedly connected to the movable spring and the magnetic conductor. The elastic part is integrally connected to the fixed part and is set at an obtuse angle to the fixed part, so that the elastic part and the part of the movable spring with the movable contact are set at an acute angle. The end of the elastic part away from the fixed part is used to connect to the push card. When the push card pushes the compression spring, the elastic part can swing towards the moving spring and generate elastic deformation.

5. The moving contact element according to claim 4, characterized in that, The elastic portion includes a first elastic portion and a second elastic portion. One end of the first elastic portion is connected to the fixed portion, and the second elastic portion is connected to the end of the first elastic portion away from the fixed portion. The second elastic portion is bent relative to the first elastic portion in a direction closer to the moving contact, so as to be set at an obtuse angle with the first elastic portion.

6. The moving contact element according to claim 1, characterized in that, One end of the compression spring has a first hook and a second hook for connecting the push card. The first hook and the second hook are spaced apart so as to clamp the push card in the thickness direction.

7. The moving contact element according to claim 6, characterized in that, The first hook and / or the second hook have chamfered edges at the positions where they contact the push card.

8. The moving contact element according to claim 1, characterized in that, The magnetic conductive element includes a body and side wings on both sides of the body. The body and the side wings form a receiving cavity with an opening on one side. A portion of the moving spring is wrapped in the receiving cavity. When the moving contact is close to the stationary contact, the magnetic conductive block closes the opening of the receiving cavity and forms the magnetic circuit with the magnetic conductive element.

9. The moving contact element according to claim 8, characterized in that, The magnetic conductor also includes a protrusion connected to the body, the protrusion being stacked and fixedly connected to one end of the compression spring and the movable spring sheet.

10. The moving contact element according to claim 8, characterized in that, The main body, one end of the compression spring, and the movable spring are stacked and fixedly connected to each other.

11. A relay, characterized in that, include: The magnetic circuit section is used to generate electromagnetic force; The contact portion includes a push card, a stationary contact with a stationary contact point, and a movable contact as described in any one of claims 1-10. The push card is connected to a compression spring of the movable contact and can swing under the drive of the electromagnetic force generated by the magnetic circuit portion to drive the movable contact on the movable contact to contact or separate from the stationary contact on the stationary contact. A magnetically conductive block is used to form a magnetic circuit with the magnetically conductive element of the moving contact when the moving contact is in contact with the stationary contact and conducts electricity.

12. The relay according to claim 11, characterized in that, The relay also includes a housing, the inner wall of which has a mounting groove. A portion of the magnetic block is embedded in the mounting groove, and another portion is exposed in the mounting groove to form a magnetic circuit with the magnetic component.

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