Relay

Abstract

The utility model discloses a relay which comprises a shell, a movable assembly and a second magnetizer. And a static contact is arranged on the shell. The movable assembly is movably arranged in the shell and comprises a push rod component, a movable contact piece and a first magnetizer, the movable contact piece is arranged on the push rod component and used for making contact with or being separated from the static contact, and the first magnetizer is fixedly connected to the push rod component and located on the side, facing the static contact, of the movable contact piece. The second magnetizer is located in the shell and fixedly arranged relative to the shell, and the second magnetizer is located on the side, opposite to the movable contact piece, of the first magnetizer.

Description

Technical Field

[0001] This application relates to the field of electrical control device technology, and more specifically, to a relay. Background Technology

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), 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] A relay includes a stationary contact, a moving contact, a push rod assembly, and a magnetic circuit. When the coil of the magnetic circuit is energized or de-energized, the magnetic circuit drives the push rod assembly to move, which in turn moves the moving contact, causing it to contact or separate from the stationary contact. After the moving contact contacts the stationary contact, an electric arc can easily be generated between them. If the arc is not stretched in time, the moving contact will not separate from the stationary contact in time, and the arc can easily burn the stationary contact and / or the moving contact, thus affecting the electrical durability of the stationary contact and the moving contact. Utility Model Content

[0004] This application provides a relay to solve the problem of untimely disconnection between the moving contact and the stationary contact in related technologies.

[0005] The relay in this application embodiment includes:

[0006] A housing, on which a stationary contact is mounted;

[0007] A movable assembly, movably disposed within the housing, includes a push rod member, a movable contact piece, and a first magnetic conductor. The movable contact piece is mounted on the push rod member for contacting or separating from the stationary contact. The first magnetic conductor is fixedly connected to the push rod member and located on the side of the movable contact piece facing the stationary contact.

[0008] The second magnetic conductor is located inside the housing and is fixed relative to the housing. The second magnetic conductor is located on the side of the first magnetic conductor that faces away from the moving contact piece.

[0009] According to some embodiments of this application, the push rod component includes a contact bracket, the movable contact piece is located inside the contact bracket, and the first magnetic conductor is fixedly connected to the contact bracket.

[0010] According to some embodiments of this application, the contact support includes two oppositely arranged side plates, and the two ends of the first magnetic conductor along the arrangement direction of the two side plates are respectively connected to the two side plates.

[0011] According to some embodiments of this application, the side plate has a locking hole, and the first magnetic conductor has a locking block, which is used to lock into the locking hole.

[0012] According to some embodiments of this application, the housing includes an insulating cover, the stationary contact is mounted on the insulating cover, the moving contact and the first magnetic conductor are located inside the insulating cover, and the second magnetic conductor is fixedly installed on the insulating cover.

[0013] According to some embodiments of this application, the first magnetic conductor is suspended from the insulating cover by a connecting rod.

[0014] According to some embodiments of this application, a pair of stationary contacts are mounted on the housing and arranged along a first direction;

[0015] The stationary contact includes a contact body and a conductive part. The contact body is connected to the housing, and the conductive part is connected to the contact body. The conductive parts of the two paired stationary contacts extend in a first direction in a direction away from each other. The end of the conductive part away from the contact body is provided with a stationary contact point for contacting or separating from the moving contact piece.

[0016] The orthographic projections of the movable contact and the conductive part on a target plane overlap; the target plane is perpendicular to the direction of movement of the movable contact.

[0017] According to some embodiments of this application, the stationary contact further includes a first arc-shaped portion, which is connected to one end of the conductive portion away from the contact body and extends from the conductive portion in a direction away from the moving contact and the contact body.

[0018] According to some embodiments of this application, the movable contact includes:

[0019] A movable spring body, wherein two ends of the movable spring body along the first direction are respectively used to contact or separate from the stationary contacts of the conductive portions of the paired stationary contacts; and

[0020] Two second guide arc portions are respectively connected to the two ends of the moving spring body along the first direction, and the second guide arc portions extend from the moving spring body in a direction away from the conductive part and the contact body.

[0021] According to some embodiments of this application, the relay further includes:

[0022] Two arc-extinguishing components are arranged at intervals along the first direction, and the movable contact is located between the two arc-extinguishing components. The second arc-guiding portion of the movable contact extends toward the arc-extinguishing component. The arc-extinguishing component includes a plurality of arc-extinguishing grids, which are arranged at intervals along the movement direction of the movable contact.

[0023] According to some embodiments of this application, the moving component further includes a third magnetic conductor, which is fixedly connected to the side surface of the moving contact facing away from the stationary contact.

[0024] According to some embodiments of this application, the moving component further includes a third magnetic conductor, which is fixedly connected to the side surface of the moving contact facing the stationary contact and located on the side of the first magnetic conductor facing away from the stationary contact.

[0025] According to some embodiments of this application, the moving contact has a groove on the side facing the stationary contact, and at least a portion of the third magnetic conductor is installed in the groove.

[0026] According to some embodiments of this application, the housing is provided with a plurality of the stationary contacts, and the moving component includes a plurality of the moving contact pieces mounted on the push rod member, wherein one of the moving contact pieces is used to contact or separate from a pair of the stationary contacts;

[0027] The relay also includes a coil assembly for driving the push rod component to move.

[0028] The relay in this application embodiment includes:

[0029] A housing, on which a stationary contact is mounted;

[0030] A movable component, movably disposed within the housing, includes a movable contact and a first magnetic conductor. The movable contact is used to contact or separate from the stationary contact, and the first magnetic conductor is fixedly connected to the side surface of the movable contact facing the stationary contact.

[0031] The second magnetic conductor is located inside the housing and is fixed relative to the housing. The second magnetic conductor is located on the side of the first magnetic conductor that faces away from the moving contact piece.

[0032] An embodiment of the above application has at least the following advantages or beneficial effects:

[0033] In the relay of this application embodiment, both the first and second magnetic conductors are located on the side of the moving contact facing the stationary contact, and the second magnetic conductor is located on the side of the first magnetic conductor facing away from the moving contact, and are fixedly disposed relative to the housing. When current passes through the moving contact, magnetic field lines in the same direction are generated in the first and second magnetic conductors, thus causing them to repel each other. Since the second magnetic conductor is fixedly disposed relative to the housing, the first magnetic conductor will be subjected to a repulsive force from the second magnetic conductor, and the direction of this repulsive force is the same as the breaking direction of the moving contact and the stationary contact. Furthermore, since the first magnetic conductor is fixedly connected to the push rod member, when the first magnetic conductor is subjected to a repulsive force, it will drive the push rod member to move along the breaking direction, which is beneficial for the rapid breaking of the moving contact, thereby timely lengthening the arc generated between the moving contact and the stationary contact, shortening the arc extinguishing time, reducing the contact erosion time, and improving the electrical durability of the moving contact and the stationary contact. At the same time, reducing the arc burning time can significantly reduce the rise in gas pressure inside the casing, thus preventing the casing from exploding due to overpressure.

[0034] Furthermore, the first magnetic conductor is located on the side of the moving contact facing the stationary contact, and the third magnetic conductor is located on the side of the moving contact facing away from the stationary contact. When current passes through the moving contact, a magnetic circuit can be formed between the first and third magnetic conductors, which strengthens the magnetic induction intensity of the first magnetic conductor, thereby increasing the repulsive force between the second and first magnetic conductors, allowing the moving contact to spring away from the stationary contact more quickly. Moreover, the larger the current passing through the moving contact, the greater the repulsive force between the second and first magnetic conductors, enabling the moving contact to disconnect more quickly and thus limiting the peak current passing through the relay.

[0035] Furthermore, when current passes through a pair of stationary contacts of the relay, the current flow direction of the conductive parts of the paired stationary contacts is the same, while the current flow direction of the moving contact is opposite to that of the conductive parts. The opposite current can form a repulsive force in the second direction between the moving contact and the conductive parts. The direction of this repulsive force is the breaking direction of the stationary contact between the moving contact and the conductive parts. Therefore, the repulsive force generated by the opposite current is conducive to realizing the rapid breaking of the moving contact and the conductive parts, so as to quickly lengthen the arc generated between the moving contact and the conductive parts, thereby shortening the arc extinguishing time, avoiding the arc burning the moving and stationary contacts, and further improving the electrical durability of the moving contact and the stationary contact. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0037] Figure 1 The diagram shown is a perspective view of a relay according to an embodiment of this application.

[0038] Figure 2 The diagram shows along Figure 1 A cross-sectional view with section line AA.

[0039] Figure 3 The diagram shown illustrates the positional relationship between the moving component and the second magnetic conductor in the first embodiment of this application.

[0040] Figure 4 The diagram shows along Figure 3 A sectional view of the BB section line.

[0041] Figure 5 The diagram shows the positional relationship between the movable contact, the first magnetic conductor, the second magnetic conductor, and the third magnetic conductor according to the first embodiment of this application.

[0042] Figure 6 The diagram shown is a schematic of the stationary contact and conductive components assembled together.

[0043] Figure 7 The diagram shown is a three-dimensional representation of the moving contact.

[0044] Figure 8 The diagram shows an arc-extinguishing assembly provided on both sides of the moving contact along the first direction.

[0045] Figure 9 The diagram shown illustrates the positional relationship between the moving component and the second magnetic conductor according to the second embodiment of this application.

[0046] Figure 10 The diagram shows along Figure 9 A cross-sectional view with the CC section line.

[0047] The reference numerals in the attached figures are explained as follows:

[0048] 100. Shell

[0049] 110. Insulating cover

[0050] 111. Ceramic cover

[0051] 1111, Top Wall

[0052] 1112, sidewall

[0053] 112. Frame

[0054] 120. Yoke plate

[0055] 130. Connecting rod

[0056] 200. Stationary contact

[0057] 210. Contact body

[0058] 220. Conductive part

[0059] 230. First guide arc section

[0060] 300, moving components

[0061] 310. Push rod components

[0062] 311. Push rod

[0063] 312. Insulating base

[0064] 313. Contact support

[0065] 3131, Side panel

[0066] 3132, swivel

[0067] 3133, Connecting plate

[0068] 320. Moving contact plate

[0069] 321. Moving spring body

[0070] 322. Second guide arc section

[0071] 323. Groove

[0072] 330. First magnetic conductor

[0073] 331. Card Block

[0074] 340. Elastic components

[0075] 400. Second magnet

[0076] 500, Third magnet

[0077] 600. Arc extinguishing assembly

[0078] 610. Arc-extinguishing grid

[0079] 700, Coil Assembly

[0080] D1, First Direction

[0081] D2, Second Direction

[0082] D3. Third direction Detailed Implementation

[0083] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0084] It is understood that the terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0085] like Figure 1 and Figure 2 As shown, the relay of this embodiment includes a housing 100, a stationary contact 200, a moving assembly 300, and a coil assembly 700. The stationary contact 200 is mounted on the housing 100, and the moving assembly 300 is movably disposed within the housing 100 for contacting or separating from the stationary contact 200. The coil assembly 700 is configured to drive the moving assembly 300 to move in response to an input signal, so that the moving assembly 300 contacts or separates from the stationary contact 200, thereby switching the relay from a closed state to an open state and from an open state to a closed state.

[0086] The number of stationary contacts 200 provided on the housing 100 is even, and they are arranged in pairs. For example, the number of stationary contacts 200 may be two, four, six, or other numbers.

[0087] For ease of explanation, the arrangement direction of the two stationary contacts 200 in pairs is defined as the first direction D1, the movement direction of the moving component 300 is defined as the second direction D2, the first direction D1 is perpendicular to the second direction D2, and the direction that is perpendicular to both the first direction D1 and the second direction D2 is defined as the third direction D3. That is, the first direction D1, the second direction D2, and the third direction D3 are all perpendicular to each other.

[0088] When there are multiple pairs of stationary contacts 200, the multiple pairs of stationary contacts 200 are arranged along the third direction D3.

[0089] Please continue reading. Figure 1 and Figure 2The housing 100 may include an insulating cover 110, a yoke plate 120, and a metal cover (not shown in the figure). The insulating cover 110 is connected to one surface of the yoke plate 120 in the thickness direction, and the metal cover is connected to the other surface of the yoke plate 120 in the thickness direction. The insulating cover 110 and the yoke plate 120 form a first chamber, and the metal cover and the yoke plate 120 form a second chamber. The yoke plate 120 has a through-hole (not shown in the figure) that penetrates the yoke plate 120 along a second direction D2. The first chamber communicates with the second chamber through the through-hole. A stationary contact 200 is mounted on the insulating cover 110.

[0090] Furthermore, such as Figure 2 The insulating cover 110 includes a ceramic cover 111 and a frame 112. The ceramic cover 111 is made of ceramic material and is connected to the yoke plate 120 through the frame 112.

[0091] The frame piece 112 can be a ring-shaped metal component, such as one made of an iron-nickel alloy. One end of the frame piece 112 is connected to the edge of the opening of the ceramic cover 111, for example, by laser welding, brazing, resistance welding, or adhesive bonding. The other end of the frame piece 112 is connected to the yoke plate 120, also by laser welding, brazing, resistance welding, or adhesive bonding. A frame piece 112 is provided between the ceramic cover 111 and the yoke plate 120 to facilitate their connection. The stationary contact 200 is mounted on the ceramic cover 111, for example, by welding.

[0092] The ceramic cover 111 may include a top wall 1111 and a side wall 1112. One end of the side wall 1112 is connected to the top wall 1111, and the other end of the side wall 1112 is connected to the yoke plate 120 through a frame 112. The stationary contact 200 is mounted on the top wall 1111.

[0093] In one embodiment, the sidewall 1112 may be a rectangular ring structure, a circular ring structure, or a ring structure of other shapes, and this application does not make any particular limitation thereto.

[0094] like Figure 3 and Figure 4 As shown, the moving assembly 300 includes a push rod member 310, a moving contact 320, and a first magnetic conductor 330. The push rod member 310 is movably inserted through a hole in the yoke plate 120, and the coil assembly 700 is configured to drive the push rod member 310 to move in response to an input signal. The moving contact 320 is located within the first cavity formed by the insulating cover 110 and the yoke plate 120, and is mounted on the push rod member 310 for contacting or separating from the stationary contact 200. The first magnetic conductor 330 is fixedly connected to the push rod member 310 and is located on the side of the moving contact 320 facing the stationary contact 200.

[0095] The relay also includes a second magnetic conductor 400, which is located inside the housing 100 and fixed relative to the housing 100. The second magnetic conductor 400 is located on the side of the first magnetic conductor 330 that faces away from the moving contact 320.

[0096] In the relay of this embodiment, the first magnetic conductor 330 and the second magnetic conductor 400 are both located on the side of the moving contact 320 facing the stationary contact 200, and the second magnetic conductor 400 is located on the side of the first magnetic conductor 330 facing away from the moving contact 320, and are fixedly disposed relative to the housing 100. When current passes through the moving contact 320, magnetic field lines in the same direction are generated in the first magnetic conductor 330 and the second magnetic conductor 400, thereby causing the first magnetic conductor 330 and the second magnetic conductor 400 to repel each other. Since the second magnetic conductor 400 is fixedly disposed relative to the housing 100, the first magnetic conductor 330 will be subjected to the repulsive force of the second magnetic conductor 400, and the direction of this repulsive force is the same as the breaking direction of the moving contact 320 and the stationary contact 200. Since the first magnetic conductor 330 is fixedly connected to the push rod component 310, when the first magnetic conductor 330 is subjected to repulsive force, it will drive the push rod component 310 to move along the breaking direction. This facilitates the rapid breaking of the moving contact 320, thereby extending the arc generated between the moving contact 320 and the stationary contact 200, shortening the arc extinguishing time, reducing the contact erosion time, and improving the electrical durability of the moving contact 320 and the stationary contact 200. Simultaneously, the reduced arc burning time significantly reduces the increase in gas pressure inside the housing 100, preventing the housing 100 from exploding due to overpressure.

[0097] It should be noted that the moving assembly 300 may include one or more moving contacts 320, and the number of moving contacts 320 is the same as the number of paired stationary contacts 200. One moving contact 320 is used to contact or separate from the paired stationary contacts 200 respectively. For example, when there is one pair of stationary contacts 200, there is also one moving contact 320; when there are two pairs of stationary contacts 200, there are also two moving contacts 320.

[0098] When there are multiple movable contact pieces 320, the multiple movable contact pieces 320 are arranged side by side along the third direction D3. And the multiple movable contact pieces 320 are mounted on the same push rod component 310.

[0099] In the embodiments of this application, multiple moving contacts 320 are mounted on the same push rod component 310, and each moving contact 320 corresponds to a pair of stationary contacts 200. When the push rod component 310 moves, multiple moving contacts 320 move simultaneously, thereby achieving the effect of "single-drive multiple-action", which is conducive to the miniaturization and integration of the relay size, and at the same time reduces the cost of the product to a certain extent.

[0100] like Figure 3As shown, the moving assembly 300 also includes one or more elastic elements 340, which are used to provide contact pressure to the moving contact 320. When there is only one elastic element 340, one end of the elastic element 340 is connected to the push rod member 310, and the other end is connected to multiple moving contacts 320. When there are multiple elastic elements 340, the number of elastic elements 340 can be the same as the number of moving contacts 320. The multiple elastic elements 340 are arranged along the third direction D3 and correspond to multiple moving contacts 320 respectively, for providing contact pressure to their respective moving contacts 320.

[0101] In one embodiment, the elastic element 340 may be a spring, leaf spring, or other component capable of providing elastic force, which is not limited in this application.

[0102] like Figure 3 and Figure 4 As shown, the push rod component 310 includes a push rod 311, an insulating seat 312, and a contact support 313. The push rod component 310 is movably inserted into a through hole in the yoke plate 120. The insulating seat 312 is connected to one axial end of the push rod 311 and is located within the first cavity enclosed by the insulating cover 110 and the yoke plate 120. The contact support 313 is connected to the insulating seat 312. The movable contact piece 320 is located within the contact support 313, and the first magnetic conductor 330 is fixedly connected to the contact support 313.

[0103] In one embodiment, the contact support 313 includes two side plates 3131 and a connecting plate 3133. The two side plates 3131 are spaced apart along a third direction D3, and the movable contact 320 is located between the two side plates 3131. The connecting plate 3133 is connected between the two side plates 3131. In this embodiment, the connecting plate 3133 and the two side plates 3131 can form a U-shape, and the insulating cover 110 covers the connecting plate 3133 and the side plates 3131 at the end near the connecting plate 3133. The two ends of the first magnetic conductor 330 along the third direction D3 are respectively connected to the two side plates 3131.

[0104] Furthermore, the side plate 3131 has a locking hole 3132, which penetrates the side plate 3131 along a third direction D3. The first magnetic conductor 330 has a locking block 331, which is used to engage with the locking hole 3132.

[0105] Of course, in other embodiments, the connecting plate 3133 and the two side plates 3131 can also form an inverted U-shape. In this embodiment, the end of the side plate 3131 away from the connecting plate 3133 is connected to the insulating base 312, and the first magnetic conductor 330 can be fixedly connected to the connecting plate 3133. The first magnetic conductor 330 and the connecting plate 3133 can be connected by riveting, gluing, or other methods, which is not particularly limited in this application.

[0106] It is worth mentioning that the push rod component 310 may include one or more contact supports 313, and the number of contact supports 313 is the same as the number of moving contact pieces 320. When there are multiple contact supports 313, the multiple contact supports 313 are arranged along the third direction D3, and the multiple moving contact pieces 320 are respectively located in the multiple contact supports 313.

[0107] like Figure 4 and Figure 5 As shown, the moving component 300 also includes a third magnetic conductor 500, which is fixedly connected to the side surface of the moving contact 320 facing away from the stationary contact 200.

[0108] In this embodiment, the first magnetic conductor 330 is located on the side of the moving contact 320 facing the stationary contact 200, and the third magnetic conductor 500 is located on the side of the moving contact 320 facing away from the stationary contact 200. When current passes through the moving contact 320, a magnetic circuit can be formed between the first magnetic conductor 330 and the third magnetic conductor 500, thereby strengthening the magnetic induction intensity of the first magnetic conductor 330 and increasing the repulsive force between the second magnetic conductor 400 and the first magnetic conductor 330, so that the moving contact 320 can more quickly spring away from the stationary contact 200. Furthermore, the larger the current passing through the moving contact 320, the greater the repulsive force between the second magnetic conductor 400 and the first magnetic conductor 330, allowing the moving contact 320 to disconnect more quickly, thereby limiting the peak current passing through the relay.

[0109] It is understandable that the number of third magnetic conductors 500 can be the same as the number of moving contacts 320. When there are multiple third magnetic conductors 500, the multiple third magnetic conductors 500 are respectively fixedly connected to the side surface of the multiple moving contacts 320 facing away from the stationary contact 200.

[0110] In one embodiment, the third magnetic conductor 500 and the moving contact 320 can be connected by riveting, gluing or other methods.

[0111] In one embodiment, the first magnetic conductor 330, the second magnetic conductor 400, and the third magnetic conductor 500 can be made of soft magnetic materials such as iron, cobalt, nickel, and their alloys.

[0112] Please return to the reference. Figure 2 The second magnetic conductor 400 can be fixedly installed on the top wall 1111 of the ceramic cover 111.

[0113] In one embodiment, the first magnetic conductor 330 is suspended from the top wall 1111 by a connecting rod 130. For example, one end of the connecting rod 130 is welded to the top wall 1111, and the other end of the connecting rod 130 is riveted to the first magnetic conductor 330.

[0114] Of course, in other embodiments, the first magnetic conductor 330 can also be fixedly connected to the yoke plate 120 by a fixing frame (not shown in the figure). For example, the fixing frame is located in the first cavity enclosed by the insulating cover 110 and the yoke plate 120, and is fixedly connected to the yoke plate 120. The first magnetic conductor 330 is fixedly connected to the fixing frame.

[0115] like Figure 2 and Figure 6 As shown, the stationary contact 200 includes a contact body 210 and a conductive part 220. The contact body 210 is connected to the top wall 1111, and the conductive part 220 is connected to the contact body 210. The conductive parts 220 of the two pairs of stationary contacts 200 extend in a direction away from each other along the first direction D1. The end of the conductive part 220 away from the contact body 210 is provided with a stationary contact point for contacting or separating from the moving contact piece 320.

[0116] The orthographic projections of the movable contact 320 and the conductive part 220 on a target plane overlap; the target plane is perpendicular to the direction of movement of the movable contact 320 (i.e., the second direction D2).

[0117] like Figure 2 As shown, if the current flows in from the left stationary contact 200 and out from the right stationary contact 200, the current flow direction of the relay is as follows: first, it flows from the left contact body 210 into the left conductive part 220, then into the moving contact 320, then from the moving contact 320 into the right conductive part 220, and finally out from the right contact body 210.

[0118] It can be seen that when current passes through a pair of stationary contacts 200 of the relay, the current flow direction of the conductive parts 220 of the paired stationary contacts 200 is the same, while the current flow direction of the moving contact 320 is opposite to that of the conductive parts 220. The opposite current can form a repulsive force along the second direction D2 between the moving contact 320 and the conductive parts 220. The direction of this repulsive force is the breaking direction of the stationary contact between the moving contact 320 and the conductive parts 220. Therefore, the repulsive force generated by the opposite current is conducive to realizing the rapid breaking of the moving contact 320 and the conductive parts 220, so as to quickly lengthen the arc generated between the moving contact 320 and the conductive parts 220, thereby shortening the arc extinguishing time, avoiding the arc burning the moving and stationary contacts, and further improving the electrical durability of the moving contact 320 and the stationary contact 200.

[0119] It is understandable that the greater the current flowing through the pair of stationary contacts 200 of the relay, the greater the repulsive force will be. When a load current flows through the pair of stationary contacts 200, the repulsive force generated between the moving contact 320 and the conductive part 220 can quickly spring the moving contact 320 away, which helps to limit the peak current and improve safety.

[0120] like Figure 2 and Figure 6As shown, the stationary contact 200 also includes a first arc-guided portion 230, which is connected to the end of the conductive portion 220 away from the contact body 210 and extends from the conductive portion 220 in a direction away from the moving contact piece 320 and the contact body 210.

[0121] In this embodiment, by providing a first arc-guiding portion 230, the arc generated between the moving contact 320 and the conductive portion 220 can be elongated along the extension direction of the first arc-guiding portion 230, thereby further shortening the arc extinguishing time and preventing the arc from burning the moving and stationary contacts for a long time. Furthermore, with the aid of the first arc-guiding portion 230, the arc can be transferred from the contact surface of the moving and stationary contacts to the end of the first arc-guiding portion 230, thereby reducing the wear on the contact surface of the moving and stationary contacts and reducing the occurrence of tipping, ensuring the electrical clearance and withstand voltage breakdown capability between the moving and stationary contacts.

[0122] Among them, the phenomenon of sharpening refers to the phenomenon that, under long-term operation or high load, the contact surface develops sharp protrusions or deformations due to current, electric arc or mechanical wear.

[0123] In one embodiment, the first arc portion 230 of the paired stationary contacts 200 is symmetrically arranged in the first direction D1.

[0124] Of course, in other embodiments, the first arc portion 230 of the paired stationary contacts 200 may also be arranged asymmetrically. For example, one of the first arc portions 230 may be longer than the other; or, one of the first arc portions 230 may form a smaller angle with the corresponding conductive portion 220, while the other first arc portion 230 may form a larger angle with the corresponding conductive portion 220.

[0125] In one embodiment, the conductive part 220 and the contact body 210 can be an integral structure or separate structures. When the conductive part 220 and the contact body 210 are separate structures, they can be connected by riveting, welding, gluing, or other methods. When the conductive part 220 and the contact body 210 are an integral structure, the contact body 210 and the conductive part 220 can be formed by machining, punching, powder metallurgy, casting, or other methods.

[0126] Furthermore, the first arc-guiding portion 230 and the conductive portion 220 can be an integral structure or separate structures.

[0127] like Figure 2 and Figure 7As shown, the movable contact 320 includes a movable spring body 321 and two second guide arc portions 322. The movable spring body 321 can be an elongated structure, and its length direction is parallel to the first direction D1. The two ends of the movable spring body 321 along the first direction D1 are used to contact or separate from the stationary contact points of the conductive parts 220 of the paired stationary contacts 200, respectively. The two second guide arc portions 322 are respectively connected to the two ends of the movable spring body 321 along the first direction D1, and the second guide arc portions 322 extend from the movable spring body 321 in a direction away from the conductive parts 220 and the contact body 210.

[0128] In the embodiments of this application, the corresponding second arc-guiding portion 322 and the first arc-guiding portion 230 can elongate the arc generated between the moving contact 320 and the conductive portion 220, thereby further shortening the arc extinguishing time and preventing the arc from burning the moving and stationary contacts for a long time. In addition, the first arc-guiding portion 230 and the second arc-guiding portion 322 can jointly transfer the arc from the contact surface of the moving and stationary contacts to the end of the first arc-guiding portion 230 and / or the second arc-guiding portion 322, thereby reducing the loss of the contact surface of the moving and stationary contacts and reducing the occurrence of arcing, ensuring the electrical clearance and withstand voltage breakdown capability between the moving and stationary contacts.

[0129] As an example, the conductive part 220 is arranged parallel to the moving spring body 321.

[0130] In one embodiment, two second guide arc portions 322 are symmetrically arranged in the first direction D1.

[0131] Of course, in other embodiments, the two second guide arc portions 322 may also be arranged asymmetrically. For example, one of the second guide arc portions 322 may be longer than the other; or, one of the second guide arc portions 322 may form a smaller angle with the moving spring body 321, while the other second guide arc portion 322 may form a larger angle with the moving spring body 321.

[0132] In one embodiment, the second guide arc portion 322 and the moving spring body 321 are either an integral structure or separate structures. When the second guide arc portion 322 and the moving spring body 321 are separate structures, they can be connected by riveting, welding, gluing, or other methods. When the second guide arc portion 322 and the moving spring body 321 are an integral structure, the moving contact piece 320 can be formed by machining, punching, powder metallurgy, casting, or other methods.

[0133] like Figure 8As shown, the relay also includes two arc-extinguishing components 600, which are disposed within the first cavity enclosed by the insulating cover 110 and the yoke plate 120, and are spaced apart along the first direction D1. A moving contact 320 is located between the two arc-extinguishing components 600. The second arc-guiding portion 322 of the moving contact 320 extends towards the arc-extinguishing component 600, and the first arc-guiding portion 230 extends towards the arc-extinguishing component 600. Each arc-extinguishing component 600 includes a plurality of arc-extinguishing grids 610, which are spaced apart along the second direction D2.

[0134] In this embodiment of the application, the moving contact 320 is provided with arc extinguishing components 600 on both sides along the first direction D1. When the electric arc generated between the moving contact 320 and the conductive part 220 is stretched, the electric arc can quickly enter the arc extinguishing component 600. The multiple arc extinguishing grids 610 of the arc extinguishing component 600 isolate the electric arc to achieve arc extinguishing, further shortening the arc extinguishing time and avoiding the electric arc from burning the moving and stationary contacts for a long time.

[0135] like Figure 9 and Figure 10 As shown, the positional relationship between the moving component 300 and the second magnetic conductor 400 in the second embodiment of this application is the same as that in the first embodiment, and will not be repeated here. The difference is that:

[0136] The third magnetic conductor 500 is fixedly connected to the side surface of the moving contact 320 facing the stationary contact 200, and is located on the side of the first magnetic conductor 330 facing away from the stationary contact 200.

[0137] Therefore, in this embodiment, the first magnetic conductor 330, the second magnetic conductor 400, and the third magnetic conductor 500 are all located on the side of the moving contact 320 facing the stationary contact 200. The third magnetic conductor 500 is located between the first magnetic conductor 330 and the moving contact 320, and the first magnetic conductor 330 is located between the third magnetic conductor 500 and the second magnetic conductor 400. When current passes through the moving contact 320, magnetic field lines in the same direction are generated in the first magnetic conductor 330, the second magnetic conductor 400, and the third magnetic conductor 500. Consequently, the third magnetic conductor 500 repels the first magnetic conductor 330, the first magnetic conductor 330 repels the second magnetic conductor 400, and the third magnetic conductor 500 repels the second magnetic conductor 400. Since the second magnetic conductor 400 is fixed relative to the housing 100, the first magnetic conductor 330 is subjected to a repulsive force from the second magnetic conductor 400, and the third magnetic conductor 500 is subjected to both repulsive forces from the first and second magnetic conductors 400. When the first magnetic conductor 330 is subjected to the repulsive force from the second magnetic conductor 400, it causes the push rod member 310 to move along the contact breaking direction. Similarly, when the third magnetic conductor 500 is subjected to the repulsive forces from both the first and second magnetic conductors 400, it causes the moving contact piece 320 to move along the contact breaking direction. Therefore, by fixing the third magnetic conductor 500 to the surface of the moving contact piece 320 facing the stationary contact 200, the reliability of contact breaking is improved, rapid breaking is achieved, and the risk of arc reignition is reduced.

[0138] In one embodiment, the moving contact 320 has a groove 323 on the side facing the stationary contact 200, and at least a portion of the third magnetic conductor 500 is disposed in the groove 323.

[0139] The movable contact 320 and the third magnetic conductor 500 can be connected by riveting, gluing, or other methods, and this application does not impose any special limitations on this.

[0140] It should be noted that when the moving component 300 includes the first magnetic conductor 330 but not the third magnetic conductor 500, the first magnetic conductor 330 can be fixedly connected to the side surface of the moving contact 320 facing the stationary contact 200.

[0141] Specifically, the moving assembly 300 includes a moving contact 320 and a first magnetic conductor 330. The moving contact 320 is used to contact or separate from the stationary contact 200, and the first magnetic conductor 330 is fixedly connected to the side surface of the moving contact 320 facing the stationary contact 200. A second magnetic conductor 400 is located inside the housing 100 and is fixedly disposed relative to the housing 100. The second magnetic conductor 400 is located on the side of the first magnetic conductor 330 facing away from the moving contact 320.

[0142] When current passes through the moving contact 320, magnetic field lines in the same direction are generated in the first magnetic conductor 330 and the second magnetic conductor 400, causing them to repel each other. Since the second magnetic conductor 400 is fixed relative to the housing 100, the first magnetic conductor 330 will be subjected to the repulsive force of the second magnetic conductor 400. Consequently, the first magnetic conductor 330 will drive the moving contact 320 to move in the direction of contact breaking, achieving rapid breaking and shortening the arc extinguishing time.

[0143] In summary, the relays of the embodiments of this application have at least the following advantages and beneficial effects:

[0144] In the relay of this embodiment, the first magnetic conductor 330 and the second magnetic conductor 400 are both located on the side of the moving contact 320 facing the stationary contact 200, and the second magnetic conductor 400 is located on the side of the first magnetic conductor 330 facing away from the moving contact 320, and are fixedly disposed relative to the housing 100. When current passes through the moving contact 320, magnetic field lines in the same direction are generated in the first magnetic conductor 330 and the second magnetic conductor 400, thereby causing the first magnetic conductor 330 and the second magnetic conductor 400 to repel each other. Since the second magnetic conductor 400 is fixedly disposed relative to the housing 100, the first magnetic conductor 330 will be subjected to the repulsive force of the second magnetic conductor 400, and the direction of this repulsive force is the same as the breaking direction of the moving contact 320 and the stationary contact 200. Since the first magnetic conductor 330 is fixedly connected to the push rod component 310, when the first magnetic conductor 330 is subjected to repulsive force, it will drive the push rod component 310 to move along the breaking direction. This facilitates the rapid breaking of the moving contact 320, thereby extending the arc generated between the moving contact 320 and the stationary contact 200, shortening the arc extinguishing time, reducing the contact erosion time, and improving the electrical durability of the moving contact 320 and the stationary contact 200. Simultaneously, the reduced arc burning time significantly reduces the increase in gas pressure inside the housing 100, preventing the housing 100 from exploding due to overpressure.

[0145] Furthermore, the first magnetic conductor 330 is located on the side of the moving contact 320 facing the stationary contact 200, and the third magnetic conductor 500 is located on the side of the moving contact 320 facing away from the stationary contact 200. When current passes through the moving contact 320, a magnetic circuit can be formed between the first magnetic conductor 330 and the third magnetic conductor 500, thereby strengthening the magnetic induction intensity of the first magnetic conductor 330 and increasing the repulsive force between the second magnetic conductor 400 and the first magnetic conductor 330, so that the moving contact 320 can more quickly spring away from the stationary contact 200. Moreover, the larger the current passing through the moving contact 320, the greater the repulsive force between the second magnetic conductor 400 and the first magnetic conductor 330, allowing the moving contact 320 to disconnect more quickly, thus limiting the peak current passing through the relay.

[0146] Furthermore, when current flows through a pair of stationary contacts 200 of the relay, the current flow direction of the conductive parts 220 of the paired stationary contacts 200 is the same, while the current flow direction of the moving contact 320 is opposite to that of the conductive parts 220. The opposite current can form a repulsive force along the second direction D2 between the moving contact 320 and the conductive parts 220. The direction of this repulsive force is the breaking direction of the stationary contact between the moving contact 320 and the conductive parts 220. Therefore, the repulsive force generated by the opposite current is conducive to realizing the rapid breaking of the moving contact 320 and the conductive parts 220, so as to quickly lengthen the arc generated between the moving contact 320 and the conductive parts 220, thereby shortening the arc extinguishing time, avoiding the arc burning the moving and stationary contacts, and further improving the electrical durability of the moving contact 320 and the stationary contact 200.

[0147] It is understood that the various embodiments / implementations provided in this application can be combined with each other without creating contradictions, and will not be described one by one here.

[0148] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0149] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the application.

[0150] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the claims. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0151] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. A relay characterized by comprising: The relay comprises: a housing, a static contact being arranged on the housing; a movable assembly movably arranged in the housing, comprising a push rod member, a movable contact and a first magnetic conductor, the movable contact being arranged on the push rod member for contacting or separating from the static contact, the first magnetic conductor being fixedly connected to the push rod member and located on a side of the movable contact facing the static contact; and a second magnetic conductor located in the housing and fixedly arranged relative to the housing, the second magnetic conductor being located on a side of the first magnetic conductor away from the movable contact. The push rod member comprises a contact support, the movable contact being located in the contact support, and the first magnetic conductor being fixedly connected to the contact support.

2. The relay according to claim 1, characterized in that The contact support comprises two oppositely arranged side plates, the first magnetic conductor being connected to the two side plates at two ends of the arrangement direction of the two side plates.

3. The relay according to claim 2, characterized in that The side plates have clamping holes, and the first magnetic conductor has clamping blocks for clamping into the clamping holes.

4. The relay according to claim 3, characterized in that The housing comprises an insulating cover, the static contact being arranged on the insulating cover, the movable contact and the first magnetic conductor being located in the insulating cover, and the second magnetic conductor being fixedly mounted on the insulating cover.

5. The relay of claim 1, wherein The first magnetic conductor is suspended on the insulating cover through a connecting rod.

6. The relay of claim 5, wherein The housing is arranged with a pair of static contacts in a first direction.

7. The relay of claim 1, wherein The static contact comprises a contact body and a conductive part, the contact body being connected to the housing, the conductive part being connected to the contact body, and the conductive parts of the pair of static contacts extending in the first direction away from each other, an end of the conductive part away from the contact body being provided with a static contact point for contacting or separating from the movable contact. The movable contact and the conductive part have respective projections overlapping each other on a target plane, the target plane being perpendicular to the movement direction of the movable contact. The static contact further comprises a first arc guiding part connected to an end of the conductive part away from the contact body and extending from the conductive part away from the movable contact and the contact body.

8. The relay according to claim 7, characterized in that The movable contact comprises:

9. The relay of claim 7, wherein a movable spring body, two ends of the movable spring body in the first direction being used for contacting or separating from the static contact points of the conductive parts of the pair of static contacts respectively; and two second arc guiding parts connected to the two ends of the movable spring body in the first direction, the second arc guiding parts extending from the movable spring body away from the conductive parts and the contact body. The relay further comprises:

10. The relay of claim 9, wherein two arc extinguishing assemblies arranged in the first direction at intervals, the movable contact being located between the two arc extinguishing assemblies, the second arc guiding parts of the movable contact extending towards the arc extinguishing assemblies; wherein the arc extinguishing assembly comprises a plurality of arc extinguishing fins, the plurality of arc extinguishing fins being arranged at intervals in the movement direction of the movable contact. The movable assembly further comprises a third magnetic conductor fixedly connected to a side surface of the movable contact away from the static contact.

11. A relay according to any one of claims 1-10, characterised in that ​ 12. A relay according to any one of claims 1-10, characterized in that The moving assembly further comprises a third magnetic conductor fixedly connected to a side surface of the moving contact plate facing the stationary contact plate and located on a side of the first magnetic conductor away from the stationary contact plate.

13. The relay of claim 12, wherein, The side of the moving contact plate facing the stationary contact plate is provided with a groove, and at least part of the third magnetic conductor is arranged in the groove.

14. The relay according to any one of claims 1 to 10, characterized in that The shell is provided with a plurality of pairs of stationary contact plates, and the moving assembly comprises a plurality of moving contact plates arranged on the push rod member, and one moving contact plate is used to contact or separate from one pair of stationary contact plates. The relay further comprises a coil assembly for driving the push rod member to move.

15. A relay, characterized by Comprise: a shell provided with a stationary contact plate; a moving assembly movably arranged in the shell, comprising a moving contact plate and a first magnetic conductor, the moving contact plate being used to contact or separate from the stationary contact plate, and the first magnetic conductor being fixedly connected to a side surface of the moving contact plate facing the stationary contact plate; and a second magnetic conductor located in the shell and fixedly arranged relative to the shell, the second magnetic conductor being located on a side of the first magnetic conductor away from the moving contact plate.

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