Contact portion and relay

Abstract

Provided in the present disclosure are a contact portion and a magnetic latching relay. The contact portion comprises: a static contact assembly, which comprises a static contact member body and a static contact point arranged on a surface of the static contact member body; a movable spring assembly, which comprises a movable spring body and a movable contact point arranged on a surface of the movable spring body, one end of the movable spring body being a fixed end, and the other end thereof being a movable end, wherein the movable contact point is arranged close to the movable end, is arranged facing the static contact point and can come into contact with or be separated from the static contact point; and a first magnetically conductive member, which remains stationary relative to the static contact member body, is located within a magnetic field corresponding to an electrically conductive portion of the movable spring body and is located between the movable contact point and the fixed end in the extension direction of the movable spring body, wherein the first magnetically conductive member is adapted to attract, when the movable spring body is energized, the movable spring body to approach the static contact member body, such that the movable contact point and the static contact point resist an electrodynamic repulsive force and remain in a closed and connected state. The contact portion in the embodiments of the present disclosure can improve the short-circuit resistance of the relay.

Description

Contact parts and relays

[0001] This disclosure claims priority to Chinese Patent Application No. 202423260110.X, filed on December 27, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure belongs to the field of relay technology, specifically relating to a contact part and a relay. Background Technology

[0003] In the electrical engineering industry, relays are widely used as control devices. They have a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and are typically used in automatic control circuits. A relay is essentially 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.

[0004] A magnetic latching relay is a type of relay. In existing magnetic latching relays, when a fault occurs during operation, the short-circuit current will cause a large electro-repulsive force to be generated between the moving and stationary contacts. Under the action of the electro-repulsive force, the moving and stationary contacts will be forced to separate and form an extremely strong fault arc, which will damage the relay. In severe cases, it may cause the relay to explode.

[0005] Therefore, it is necessary to overcome the electrodynamic repulsion between the moving and stationary contacts to improve the operational reliability and product quality of the magnetic latching relay. To address this issue, existing technologies typically connect the moving spring lead to the side of the moving spring body away from the moving contact in the moving spring assembly, with the current direction of the lead opposite to that of the moving spring body. This causes the moving spring body to experience an Ampere force from the magnetic field generated by the lead, increasing the contact pressure between the moving and stationary contacts. However, this structure results in a large volume for the moving spring assembly and a long lead, leading to higher material consumption and cost. Summary of the Invention

[0006] The purpose of this disclosure is to provide a contact part and a relay that can solve the problem that existing relays have high material consumption and high cost in order to ensure operational reliability.

[0007] To solve the above-mentioned technical problems, this disclosure is implemented as follows:

[0008] In a first aspect, embodiments of this disclosure provide a contact portion, the contact portion comprising:

[0009] A static contact assembly, the static contact assembly including a static contact body and static contact points disposed on the surface of the static contact body;

[0010] A movable spring assembly, comprising a movable spring body and a movable contact disposed on the surface of the movable spring body, wherein one end of the movable spring body is a fixed end and the other end is a movable end, and the movable contact is disposed close to the movable end;

[0011] The moving contact is positioned face-to-face with the stationary contact and can contact or separate from the stationary contact;

[0012] The first magnetic conductor is relatively stationary with respect to the stationary contact body. It is located within the magnetic field corresponding to the portion of the moving spring body used for current flow and is situated between the moving contact and the fixed end in the extending direction of the moving spring body. The first magnetic conductor is adapted to attract the moving spring body closer to the stationary contact body when the moving spring body is energized, so that the moving contact and the stationary contact resist the electric repulsion force and remain in a closed conductive state.

[0013] According to some embodiments of this disclosure, the contact portion further includes:

[0014] The second magnetic conductive element is fixedly connected to the side of the moving spring body away from the stationary contact, and the second magnetic conductive element is fixedly connected to the conductive part of the moving spring body.

[0015] When the moving contact and the stationary contact are closed and connected, the first magnetic conductor and the second magnetic conductor form a closed magnetic circuit based on the current flowing in the moving spring body and generate electromagnetic attraction.

[0016] According to some embodiments of this disclosure, in the contact direction between the moving contact and the stationary contact, the side of the first magnetic conductor facing the moving spring body is closer to the moving spring body than the stationary contact.

[0017] According to some embodiments of this disclosure, at least one of the first magnetic conductor and the second magnetic conductor is bent along the thickness direction of the moving spring body to form a side flange.

[0018] According to some embodiments of this disclosure, the moving spring body includes a plurality of moving spring branches arranged in parallel, and each of the moving spring branches is provided with the moving contact;

[0019] At least one of the moving spring branches is fixed with the second magnetic conductor for the portion for carrying current, and each second magnetic conductor corresponds to one first magnetic conductor.

[0020] According to some embodiments of this disclosure, each of the moving spring branches has the second magnetic conductor fixed to the portion for conducting current.

[0021] According to some embodiments of this disclosure, the second magnetic conductor is fixed together with the moving spring body by welding, riveting or bonding.

[0022] According to some embodiments of this disclosure, along the extending direction of the moving spring body, the portion of the stationary contact body used for current flow and the portion of the moving spring body used for current flow are respectively located on both sides of the stationary contact.

[0023] According to some embodiments of this disclosure, the first magnetic conductive element is fixedly connected to the stationary contact body or fixedly connected to the fixed end of the moving spring body.

[0024] According to some embodiments of this disclosure

[0025] The first magnetic conductive element has a mounting portion, which is riveted to the stationary contact at the same riveting fixing point on the stationary contact body; or, the moving spring assembly further includes a moving spring lead-out piece, which is riveted to the moving spring body at the same riveting fixing point on the moving spring lead-out piece.

[0026] According to some embodiments of this disclosure, the first magnetic conductive element has at least two riveting fixing points with the stationary contact body or the moving spring body.

[0027] According to some embodiments of this disclosure, the second magnetic conductor is bent along both sides of the width direction of the moving spring body to form side flanges along the thickness direction of the moving spring body, and the side flanges abut against the side wall of the moving spring body.

[0028] According to some embodiments of this disclosure, the second magnetic conductor is fixed to the moving spring body at a position near the moving contact.

[0029] According to some embodiments of this disclosure, an arched bend is provided between the movable end and the fixed end of the moving spring body, and the second magnetic conductor is fixed between the bend and the moving contact.

[0030] According to some embodiments of this disclosure, both the first magnetic conductive element and the second magnetic conductive element have magnetically conductive flat plates. When the moving contact and the stationary contact are in contact, the magnetically conductive flat plates are parallel to the portion of the moving spring body used for current flow.

[0031] Secondly, this disclosure also provides a relay including a contact portion as described in the first aspect of this disclosure.

[0032] According to some embodiments of this disclosure, the relay is a magnetic latching relay.

[0033] In this embodiment, the first magnetic conductor is located within the magnetic field corresponding to the portion of the moving spring body used for current flow. The first magnetic conductor concentrates most of the magnetic field and magnetizes it, thus generating a magnetic attraction force along the contact pressure direction between the first magnetic conductor and the moving spring body. This magnetic attraction force draws the moving spring body closer to the stationary contact body, allowing the moving and stationary contacts to resist the electrodynamic repulsion caused by the short-circuit current, thereby maintaining a closed conducting state and improving the reliability of the relay. Furthermore, in this embodiment, since the magnetic attraction force enhances the contact and engagement performance of the moving and stationary contacts against short circuits, it eliminates the need to use more copper consumables to create a larger moving spring assembly, thus reducing the amount and cost of copper consumables.

[0034] In addition, the contact portion of other embodiments of this disclosure has the following advantages: 1) By providing a second magnetic conductive element, a closed magnetic circuit can be formed, which helps to gather more magnetic lines of force, reduce magnetic leakage, and achieve higher magnetic efficiency, thereby increasing magnetic attraction. This helps to ensure that the moving contact and the stationary contact resist the electric repulsion with a larger and more stable magnetic attraction, preventing the moving contact and the stationary contact from being bounced apart, and enhancing short-circuit resistance; 2) The side flange of the first magnetic conductive element or the second magnetic conductive element can reduce the gap between them, reduce magnetic resistance, and help to improve magnetic attraction. In addition, the first magnetic conductive element or the second magnetic conductive element forming the side flange can also guide the direction of the magnetic field, so that more magnetic lines of force can be gathered in a predetermined direction. 3) The moving spring body adopts a structure of multiple branches in parallel, which can divert the current on the moving spring body. For a single moving spring branch, after the current is reduced, its electric repulsion force is also reduced; 4) The part of the stationary contact body for current flow and the part of the moving spring body for current flow are located on both sides of the stationary contact, that is, the stationary contact assembly and the moving spring assembly are staggered. In this way, when the current flows through the stationary contact body and generates a magnetic field, it will not generate an Ampere force away from the contact direction on the moving spring body, which can further improve the ability to resist the electric repulsion force between the stationary contact and the moving contact, which is conducive to improving the magnetic attraction force. Attached Figure Description

[0035] Figure 1 is a schematic diagram of a first type of contact portion according to an embodiment of the present disclosure;

[0036] Figure 2 is a schematic diagram of a moving spring assembly according to an embodiment of the present disclosure;

[0037] Figure 3 is a schematic diagram of the second type of contact portion according to an embodiment of this disclosure;

[0038] Figure 4 is a cross-sectional view of Figure 3 at position AA according to an embodiment of the present disclosure;

[0039] Figure 5 is a schematic diagram of the third type of contact portion according to an embodiment of this disclosure;

[0040] Figure 6 is a cross-sectional view of Figure 5 at position BB according to an embodiment of the present disclosure;

[0041] Figure 7 is a schematic diagram of a third type of contact portion according to an embodiment of this disclosure;

[0042] Figure 8 is a cross-sectional view of Figure 7 at the CC position according to an embodiment of the present disclosure;

[0043] Figure 9 is a schematic diagram of the fourth type of contact portion according to an embodiment of this disclosure;

[0044] Figure 10 is a cross-sectional view of Figure 9 at position DD according to an embodiment of the present disclosure;

[0045] Figure 11 is an isometric view of a movable spring body according to an embodiment of the present disclosure;

[0046] Figure 12 is an isometric view of the positional relationship between the moving spring body and the stationary contact body according to an embodiment of the present disclosure;

[0047] Figure 13 is a schematic diagram of the fifth type of contact portion according to an embodiment of the present disclosure;

[0048] Figure 14 is a cross-sectional view of Figure 13 at the EE position according to an embodiment of the present disclosure;

[0049] Figure 15 is a schematic diagram of the sixth type of contact portion according to an embodiment of the present disclosure;

[0050] Figure 16 is a cross-sectional view of Figure 15 at position FF, according to an embodiment of the present disclosure.

[0051] Reference numerals: 10. Static contact assembly; 101. Static contact body; 102. Static contact point; 11. Moving spring assembly; 111. Moving spring body; 111a. Fixed end; 111b. Moving end; 111c. Bending portion; 1111. Moving spring branch; 112. Moving contact point; 113. Moving spring lead-out piece; 12. First magnetic conductor; 12a. First flange; 13. Second magnetic conductor; 13a. Second flange. Detailed Implementation

[0052] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0053] The terms "first," "second," etc., used in this disclosure and in the claims are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this disclosure can be implemented in orders other than those illustrated or described herein. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0054] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element 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 this disclosure.

[0055] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0056] The relay provided in this disclosure will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios. The relay can be driven by electromagnetic force or by a motor. In this application embodiment, a magnetic latching relay driven by electromagnetic force will be used as an example for description.

[0057] Referring to Figure 1, a schematic diagram of a contact portion according to an embodiment of the present disclosure is shown. This contact portion is used in a magnetic latching relay to control the on / off state of a load circuit. The contact portion includes:

[0058] The static contact assembly 10 includes a static contact body 101 and static contact points 102 disposed on the surface of the static contact body 101.

[0059] The moving spring assembly 11 includes a moving spring body 111 and a moving contact 112 disposed on the surface of the moving spring body 111. One end of the moving spring body 111 is a fixed end 111a and the other end is a movable end 111b. The moving contact 112 is disposed close to the movable end 111b. The moving contact 112 is disposed face-to-face with the stationary contact 102 and can contact or separate from the stationary contact 102.

[0060] The first magnetic conductor 12 remains relatively stationary with the stationary contact body 101 and is located within the magnetic field corresponding to the portion of the moving spring body 111 used for current flow. It is situated between the moving contact 112 and the fixed end 111a in the extending direction of the moving spring body 111. The first magnetic conductor 12 attracts the moving spring body 111 closer to the stationary contact body 101 so that the moving contact 112 and the stationary contact 102 resist the electric repulsion force and remain in a closed conductive state.

[0061] Figure 1 shows a schematic diagram of the structure of a first type of contact portion according to an embodiment of this disclosure. This contact portion includes a stationary contact assembly 10, a moving spring assembly 11, and a first magnetic conductive element 12. The stationary contact assembly 10 and the moving spring assembly 11 are conductive elements in a magnetic latching relay used to connect to an external load circuit. The stationary contact assembly 10 includes a stationary contact body 101, which is installed inside the relay and remains stationary. For example, the stationary contact body 101 can be a sheet-like structure made of copper sheet or other conductors, and a stationary contact 102 can be riveted to one end of the stationary contact body 101. The stationary contact 102 can be a hemispherical or frustum-shaped protrusion structure with a higher conductivity than the stationary contact body 101. The end of the stationary contact body 101 not where the stationary contact 102 is installed can extend out to form a first wiring pin, which can be electrically connected to the load that the relay needs to control.

[0062] As shown in Figure 2, similar to the static contact assembly 10, the moving spring assembly 11 includes a moving spring body 111. The moving spring body 111 can be a metal spring structure with elasticity. One end of the moving spring body 111 is a fixed end 111a, which can be riveted and fixed inside the relay, and the other end is a movable end 111b. A moving contact 112 is provided near the movable end 111b. The moving contact 112 can be a hemispherical or frustum-shaped protrusion structure with a higher conductivity than the moving spring body 111.

[0063] In some embodiments, the moving spring assembly 11 is disposed on one side of the stationary contact assembly 10. For example, in the schematic diagram of FIG1, the moving spring assembly 11 is located on the right side of the stationary contact assembly 10, in which case the moving contact 112 and the stationary contact 102 are arranged face to face. Since the moving spring body 111 itself is elastic, the movable end 111b, which is not constrained and fixed, can swing relative to the fixed end 111a, causing the moving contact 112 to contact or separate from the stationary contact 102 opposite it. Specifically, inside the relay, the movable end 111b of the moving spring body 111 can be connected to the push assembly in the relay. When the electromagnetic coil drives the push assembly to move, the push assembly can drive the movable end 111b of the moving spring body 111 to swing.

[0064] Furthermore, referring to the illustration in Figure 1, the first magnetic conductive element 12 can be mounted and fixed on a stationary insulating component inside the relay, or it can be fixed together with the fixed end 111a of the stationary contact body 101 or the moving spring body 111. When the moving contact 112 moves, the first magnetic conductive element 12 simply remains stationary. Taking one structure illustrated in Figure 1 as an example, the contact direction between the moving contact 112 and the stationary contact 102 is the first direction X. Along the first direction X, the first magnetic conductive element 12 can be located between the stationary contact body 101 and the moving spring body 111, remaining relatively stationary with respect to the stationary contact body 101.

[0065] As shown in Figure 1, the current flow path in the contact portion is illustrated by the trajectory corresponding to the dashed arrow. When the current flows through the portion of the moving spring body 111 used for current flow, a magnetic field is generated in that portion. The first magnetic conductor 12 is located within the magnetic field corresponding to the moving spring body 111. The first magnetic conductor 12 concentrates most of the magnetic field and magnetizes the first magnetic conductor 12. This generates a magnetic attraction force along the contact pressure direction between the first magnetic conductor 12 and the moving spring body 111. This magnetic attraction force attracts the moving spring body 111 closer to the stationary contact body 101, allowing the moving contact 112 and the stationary contact 102 to resist the electrodynamic repulsion caused by the short-circuit current, thereby maintaining a closed conductive state and improving the operational reliability of the relay. Furthermore, in this embodiment, since the magnetic attraction force is used to enhance the contact engagement performance of the moving contact 112 and the stationary contact 102 against short circuits, it is not necessary to use more copper consumables to make a moving spring assembly with a larger structural volume, which also helps to reduce the amount and cost of copper consumables.

[0066] In some embodiments, referring to any of the illustrations in Figures 3 to 10, the contact portion further includes:

[0067] The second magnetic conductive element 13 is fixed to the side of the moving spring body 111 away from the stationary contact 102, and the second magnetic conductive element 13 is arranged opposite to the first magnetic conductive element 12.

[0068] When the moving contact 112 and the stationary contact 102 are closed and conducting, the first magnetic conductor 12 and the second magnetic conductor 13 form a closed magnetic circuit based on the current flowing in the moving spring body 111 and generate electromagnetic attraction.

[0069] Specifically, as shown in any of Figures 3 to 10, based on the aforementioned embodiments, the contact portion of this disclosure embodiment may include a second magnetic component 13 in addition to the first magnetic component 12. It should be noted that the second magnetic component 13 and the first magnetic component 12 can be magnetic blocks or sheets made of the same material, such as iron, cobalt, nickel, or their alloys. The second magnetic component 13 can be riveted, welded, or bonded to the moving spring body 111, and a portion of the second magnetic component 13 is located on the side facing away from the stationary contact 102, forming a face-to-face relative positional relationship with the first magnetic component 12. Taking Figure 3 as an example, the first magnetic component 12 is located on the left side of the portion of the moving spring body 111 used for current flow and is in a stationary, fixed state. A portion of the second magnetic component 13 is located on the right side of the portion of the moving spring body 111 used for current flow and can move with the movement of the moving contact 112.

[0070] Once the moving contact 112 moves to contact and conduct with the stationary contact 102, the magnetic field formed by the current flowing through the moving spring body 111 will also magnetize the second magnetic conductor 13. Thus, a closed magnetic circuit is formed between the first magnetic conductor 12 and the second magnetic conductor 13, encircling the moving spring body 111. This reduces magnetic leakage between the first magnetic conductor 12 and the second magnetic conductor 13, resulting in higher magnetic efficiency. This helps ensure that the moving contact 112 and the stationary contact 102 resist the electric repulsion with a larger and more stable magnetic attraction, preventing the moving contact 112 from being bounced away from the stationary contact 102.

[0071] In some embodiments, in the contact direction of the moving contact 112 and the stationary contact 102, the side of the first magnetic conductor 12 facing the moving spring body 111 is closer to the moving spring body 111 than the stationary contact 102.

[0072] Specifically, in this embodiment of the present disclosure, in the disconnected state, along the contact direction X between the moving contact 112 and the stationary contact 102, the distance between the side of the first magnetic conductive element 12 facing the moving spring body 111 and the moving spring body 111 is less than the distance between the stationary contact 102 and the moving spring body 111. That is, the side of the first magnetic conductive element 12 facing the moving spring body 111 is closer to the moving spring body 111 than the stationary contact 102. This results in a better magnetizing effect of the first magnetic conductive element 12, which can generate a more reliable magnetic attraction force to resist the electrodynamic repulsion force.

[0073] In some embodiments, referring to Figures 3 to 10, at least one of the first magnetic conductor 12 and the second magnetic conductor 13 is bent along the thickness direction of the moving spring body 111 to form a side flange.

[0074] Specifically, at least one of the first magnetic conductive element 12 and the second magnetic conductive element 13 in the embodiments of this disclosure can be a shape with a flanged structure after the magnetic conductive material is bent along the thickness direction X of the moving spring body 111.

[0075] As shown in Figures 3 and 4, the first magnetic conductor 12 and the second magnetic conductor 13 each have a side flange, namely the first flange 12a and the second flange 13a. The cross-sections of the first magnetic conductor 12 and the second magnetic conductor 13 are both L-shaped. The first flange 12a and the second flange 13a are located on both sides of the width direction Y of the moving spring body 111.

[0076] As shown in Figures 5 and 6, the cross-section of the first magnetic conductor 12 is in the shape of a straight line, and the second magnetic conductor 13 has two second flanges 13a. The cross-section of the second magnetic conductor 13 is U-shaped, and the two second flanges 13a are located on both sides of the width direction Y of the moving spring body 111.

[0077] As shown in Figures 7 and 8, the first magnetic conductor 12 has two first flanges 12a. The cross-section of the first magnetic conductor 12 is U-shaped, and the cross-section of the second magnetic conductor 13 is straight. The two first flanges 12a are located on both sides of the width direction Y of the moving spring body 111.

[0078] As shown in Figures 9 and 10, the first magnetic conductor 12 has two first flanges 12a, and the cross-section of the first magnetic conductor 12 is U-shaped. The second magnetic conductor 13 has two second flanges 13a, and the cross-section of the second magnetic conductor 13 is U-shaped. The two second flanges 13a are located on both sides of the width direction Y of the moving spring body 111, and the two first flanges 12a are opposite to the two second flanges 13a along the first direction X.

[0079] By relying on the side flange of the magnetic conductor, the gap between the first magnetic conductor 12 and the second magnetic conductor 13 can be reduced and they can be brought closer together. Furthermore, the first magnetic conductor 12 and the second magnetic conductor 13 can cover at least one side of the moving spring body 111 to better guide the magnetic lines of force to form a closed magnetic circuit and enhance the magnetic attraction force.

[0080] In some embodiments, referring to Figures 11 and 12, the moving spring body 111 includes a plurality of moving spring branches 1111 arranged in parallel, and each moving spring branch 1111 is provided with a moving contact 112;

[0081] At least one moving spring branch 1111 is fixed with a second magnetic conductor 13 for the portion for carrying current, and each second magnetic conductor 13 corresponds to a first magnetic conductor 12.

[0082] Specifically, as illustrated in Figures 11 and 12, in one embodiment of this disclosure, the movable spring body 111 may include a plurality of movable spring branches 1111 arranged in parallel. Each movable spring branch 1111 may be a metal spring structure with elasticity, and the fixed ends of the plurality of movable spring branches 1111 may be connected as one unit. The movable end of each movable spring branch 1111 is provided with a movable contact 112.

[0083] By designing the moving spring body 111 into this structure with multiple branches connected in parallel, the current on the moving spring body 111 can be diverted. For a single moving spring branch 1111, the current is reduced, and its electrodynamic repulsion is also reduced.

[0084] Based on this, at least one of the moving spring branches 1111 is fixed with a second magnetic conductor 13 for the portion for current flow. Each second magnetic conductor 13 corresponds to a first magnetic conductor 12. The second magnetic conductor 13 and the first magnetic conductor 12 on the other side of the moving spring branch 1111 form a closed magnetic circuit, which can improve the performance of the corresponding moving spring branch 1111 in resisting electric repulsion.

[0085] In some embodiments, referring to Figures 11 and 12, each portion of the moving spring branch 1111 used for current flow is fixed with a second magnetic conductor 13.

[0086] Specifically, to ensure that each moving spring branch 1111 is not repelled by the electric repulsion force, a second magnetic conductor 13 is fixed to the portion of each moving spring branch 1111 used for current flow. For example, in the moving spring body 111 shown in Figures 11 and 12, the moving spring body 111 has three moving spring branches 1111 and three moving contacts 112, and a second magnetic conductor 13 and a first magnetic conductor 12 are installed on both sides of the moving spring branches 1111.

[0087] In some embodiments, the second magnetic conductor 13 is fixed together with the moving spring body 111 by welding, riveting or bonding.

[0088] Specifically, in one embodiment of this disclosure, the second magnetic conductor 13 and the moving spring branch 1111 can be fixed together by riveting, thereby ensuring that the two are reliably joined together.

[0089] In some embodiments, referring to Figures 13 and 14, along the extending direction of the moving spring body 111, the portion of the stationary contact body 101 used for current flow and the portion of the moving spring body 111 used for current flow are located on both sides of the stationary contact 102.

[0090] Specifically, in one embodiment of this disclosure, as illustrated in Figures 13 and 14, the moving spring body 111 extends along the Z-direction as shown in the figures. Using the stationary contact 102 as a reference position, the portion of the stationary contact body 101 above the stationary contact 102 along the Z-direction is the portion used for current flow, while the portion of the moving spring body 111 below the stationary contact 102 along the Z-direction is the portion used for current flow. Thus, the stationary contact assembly 10 and the moving spring assembly 11 form the staggered arrangement shown in Figure 13. When the moving contact 112 and the stationary contact 102 are in contact and conducting, the path of the current flowing through the stationary contact assembly 10 and the moving spring assembly 11 is Z-shaped, as illustrated by the dashed arrow trajectory in the figures.

[0091] With this type of contact structure, the magnetic field generated when current flows through the stationary contact body 101 will not exert an Ampere force on the moving spring body 111 that is away from the contact direction. This can further enhance the ability to resist the electro-repulsive force between the stationary contact 102 and the moving contact 112, and improve the short-circuit protection effect.

[0092] In some embodiments, the first magnetic conductor 12 is fixedly connected to the stationary contact body 101, or fixedly connected to the fixed end 111a of the moving spring body 111.

[0093] Specifically, in some embodiments, the first magnetic conductive element 12 can be fixed together with the stationary contact body 101. The fixed connection between the first magnetic conductive element 12 and the stationary contact body 101 can be specifically determined according to the structural shape of the first magnetic conductive element 12, and this embodiment does not limit this. Alternatively, the first magnetic conductive element 12 can be fixed together with the fixed end 111a of the moving spring body 111, so that the first magnetic conductive element 12 remains stationary. It should be noted that, in order to save space, the first magnetic conductive element 12 can be installed and fixed in the gap between the stationary contact body 101 and the moving spring body 111.

[0094] In some embodiments, referring to Figures 15 and 16,

[0095] The first magnetic conductor 12 has a mounting portion, which is riveted and fixed to the stationary contact 102 at the same riveting fixing point on the stationary contact body 101; or, the moving spring assembly 11 further includes a moving spring lead-out piece 113, which is riveted and fixed to the fixed end of the moving spring body 111 at the same riveting fixing point on the moving spring lead-out piece 113.

[0096] Specifically, in some embodiments, the moving spring assembly 11 further includes a moving spring lead-out piece 113. The fixed end 111a of the moving spring body 111 can be riveted and fixed to the moving spring lead-out piece 113. The moving spring lead-out piece 113 can extend to the outside of the relay to form a second wiring pin. The second wiring pin can be electrically connected to the load that the relay needs to control.

[0097] The first magnetic conductive element 12 may include a portion for conducting magnetism and a mounting portion for mounting and fixing. When the first magnetic conductive element 12 is fixed to the stationary contact body 101, the mounting portion can be fixed to the side of the stationary contact 102 opposite to the moving contact 112, and riveted to the stationary contact 102 at the same riveting fixing point. As shown in Figures 15 and 16, when the first magnetic conductive element 12 is fixed to the moving spring body 111, the mounting portion can be riveted to the part where the moving spring body 111 and the moving spring lead-out piece 113 are riveted. Therefore, whether the first magnetic conductive element 12 is riveted to the stationary contact body 101 or to the moving spring body 111, this connection structure allows three different parts to be fixed together with only one riveting process, improving the efficiency of assembly and connection, and avoiding the space occupation caused by too many rivets.

[0098] In some embodiments, the first magnetic conductor 12 has at least two riveting fixing points with the stationary contact body 101 or the moving spring body 111.

[0099] Specifically, since the rivets used for riveting are usually cylindrical, in order to prevent the first magnetic conductive element 12 from rotating relative to the stationary contact body 101 or the moving spring body 111, at least two riveting fixing points can be set at the riveting part to prevent the rotation of the first magnetic conductive element 12, thereby improving the stability of the first magnetic conductive element 12 and ensuring a reliable magnetic attraction effect.

[0100] In some embodiments, referring to any one of the schematic diagrams in Figures 3 to 6, the two sides of the second magnetic conductor 13 are bent along the thickness direction of the moving spring body 111 to form side flanges, which abut against the side wall of the moving spring body 111.

[0101] Specifically, referring to the illustrations in Figures 3 to 6, when the second magnetic conductor 13 is bent along the thickness direction X of the moving spring body 111 to form a side flange, at least one side flange can abut against the side wall of the moving spring body 111, thereby keeping the second magnetic conductor 13 and the moving spring body 111 relatively stationary, so as to improve the stability of the second magnetic conductor 13 and ensure a reliable magnetic attraction effect.

[0102] For example, in Figures 3 and 4, along the width direction Y of the moving spring body 111, one side of the second magnetic conductor 13 is bent to form a second flange 13a, and the second flange 13a on one side abuts and limits one side wall of the moving spring body 111. In Figures 5 and 6, along the width direction Y of the moving spring body 111, both sides of the second magnetic conductor 13 are bent to form two second flanges 13a, and the second flanges 13a on both sides abut and limit one side wall of the moving spring body 111.

[0103] In some embodiments, referring to any one of the schematic diagrams in Figures 3 to 10, the second magnetic conductor 13 is fixed on the moving spring body 111 at a position near the moving contact 112.

[0104] Specifically, referring to any of the illustrations in Figures 3 to 10, along the Z direction shown in the figures, the second magnetic conductor 13 is installed and fixed closer to the position of the upper stationary contact 102, so that the magnetic attraction between the first magnetic conductor 12 and the second magnetic conductor 13 can act more effectively on the stationary contact 102 and the moving contact 112, making it easier to keep the stationary contact assembly 10 and the moving spring assembly 11 engaged.

[0105] In some embodiments, referring to any of the schematic diagrams in Figures 3 to 10, an arched bend 111c is provided between the movable end 111b and the fixed end 111a of the moving spring body 111, and the second magnetic conductor 13 is fixed between the bend 111c and the moving contact 112.

[0106] Specifically, referring to any of the schematic diagrams in Figures 3 to 10, an arched bend 111c is provided between the movable end 111b and the fixed end 111a of the moving spring body 111. The arched bend 111c can improve the flexibility and elasticity of the moving spring body 111, and is beneficial to improving its current-carrying performance and determining the rotation fulcrum of the moving spring body 111. When the movable end 111b is driven by the push assembly, the movable end 111b of the moving spring body 111 swings in an arc trajectory with the bend 111c as the rotation fulcrum. At this time, the second magnetic conductor 13 can be fixed between the bend 111c and the moving contact 112, so that the second magnetic conductor 13 is closer to the moving contact 112 and the stationary contact 102. This can prevent the magnetic attraction between the first magnetic conductor 12 and the second magnetic conductor 13 from unreliably improving the short-circuit withstand capability due to the presence of the bend 111c between the second magnetic conductor 13 and the moving contact 112.

[0107] In some embodiments, the first magnetic conductor 12 and the second magnetic conductor 13 both have magnetically conductive plates, and the magnetically conductive plates are parallel to the portion of the moving spring body 111 used for current flow.

[0108] Specifically, when the contact portion includes both the first magnetic conductor 12 and the second magnetic conductor 13, the common feature of the first magnetic conductor 12 and the second magnetic conductor 13 is that they both have rectangular parallel magnetic plates. These magnetic plates are the largest area of ​​the magnetic conductors. When the moving contact 112 and the stationary contact 102 are in contact, the magnetic plates of the first magnetic conductor 12 and the second magnetic conductor 13 are parallel to the part of the moving spring body 111 used for current flow, which can reduce the space occupied inside the relay and help to achieve miniaturization of the relay.

[0109] This disclosure also provides a relay including a contact portion as described in any of the foregoing embodiments of this disclosure. By applying the contact portion of any of the foregoing embodiments to the relay, the short-circuit withstand performance of the relay can be improved; specifically, the relay can be a magnetic latching relay.

[0110] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this disclosure is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0111] The embodiments of this disclosure have been described above with reference to the accompanying drawings. However, this disclosure is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this disclosure without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this disclosure.

Claims

1. A contact portion, characterized by The contact portion includes: A static contact assembly, the static contact assembly including a static contact body and static contact points disposed on the surface of the static contact body; A movable spring assembly includes a movable spring body and a movable contact disposed on the surface of the movable spring body. One end of the movable spring body is a fixed end and the other end is a movable end. The movable contact is disposed close to the movable end. The movable contact is disposed face-to-face with the stationary contact and can contact or separate from the stationary contact. The first magnetic conductor is relatively stationary with respect to the stationary contact body. It is located within the magnetic field corresponding to the portion of the moving spring body used for current flow and is situated between the moving contact and the fixed end in the extending direction of the moving spring body. The first magnetic conductor is adapted to attract the moving spring body closer to the stationary contact body when the moving spring body is energized, so that the moving contact and the stationary contact resist the electric repulsion force and remain in a closed conductive state.

2. The contact portion according to claim 1, characterized in that The contact portion also includes: The second magnetic conductive element is fixed to the side of the moving spring body away from the stationary contact, and the second magnetic conductive element is disposed opposite to the first magnetic conductive element. When the moving contact and the stationary contact are closed and connected, the first magnetic conductor and the second magnetic conductor form a closed magnetic circuit based on the current flowing in the moving spring body and generate electromagnetic attraction.

3. The contact portion according to claim 1, characterized in that, In the contact direction between the moving contact and the stationary contact, the side of the first magnetic conductor facing the moving spring body is closer to the moving spring body than the stationary contact.

4. The contact portion according to claim 2, characterized in that, At least one of the first magnetic conductive element and the second magnetic conductive element is bent along the thickness direction of the moving spring body to form a side flange.

5. The contact portion according to claim 2, characterized in that, The moving spring body includes multiple moving spring branches arranged in parallel, and each moving spring branch is provided with the moving contact; At least one of the moving spring branches is fixed with the second magnetic conductor for the portion for carrying current, and each second magnetic conductor corresponds to one first magnetic conductor.

6. The contact portion according to claim 5, characterized in that, Each of the moving spring branches has the second magnetic conductor fixed to the portion for carrying current.

7. The contact portion according to claim 2, characterized in that, The second magnetic conductor is fixed together with the moving spring body by welding, riveting or bonding.

8. The contact portion according to claim 1, characterized in that, Along the extending direction of the moving spring body, the portion of the stationary contact body used for current flow and the portion of the moving spring body used for current flow are located on both sides of the stationary contact.

9. The contact portion according to claim 1, characterized in that, The first magnetic conductive element is fixedly connected to the stationary contact body or to the fixed end of the moving spring body.

10. The contact portion according to claim 9, characterized in that, The first magnetic conductive component has a mounting portion, which is riveted to the stationary contact at the same riveting fixing point on the stationary contact body; or, the moving spring assembly further includes a moving spring lead-out piece, which is riveted to the fixed end of the moving spring body at the same riveting fixing point on the moving spring lead-out piece.

11. The contact portion according to claim 10, characterized in that, The first magnetic conductive element has at least two riveting fixing points with the stationary contact body or the moving spring body.

12. The contact portion according to claim 2, characterized in that, The second magnetic conductor is bent along both sides of the moving spring body in the width direction to form a side flange in the thickness direction of the moving spring body, and the side flange abuts against the side wall of the moving spring body.

13. The contact portion according to claim 2, characterized in that, The second magnetic conductor is fixed to the moving spring body near the moving contact.

14. The contact portion according to claim 13, characterized in that, An arched bend is provided between the movable end and the fixed end of the moving spring body, and the second magnetic conductor is fixed between the bend and the moving contact.

15. The contact portion according to claim 2, characterized in that, Both the first and second magnetic conductive components have magnetically conductive flat plates. When the moving contact and the stationary contact are in contact, the magnetically conductive flat plates are parallel to the portion of the moving spring body used for current flow.

16. A relay, characterized in that, Includes the contact portion as described in any one of claims 1 to 15.

17. The relay as claimed in claim 16, characterized in that, The relay is a magnetic latching relay.

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