Contact portion and magnetic latching relay

Abstract

The utility model discloses a contact part and a magnetic latching relay. The contact part comprises a static contact assembly which comprises a static contact body and a static contact arranged on the surface of the static contact body; the movable spring assembly comprises a movable spring body and a movable contact arranged on the surface of the movable spring body, one end of the movable spring body is a fixed end, the other end of the movable spring body is a movable end, and the movable contact is arranged close to the movable end; the movable contact and the static contact are arranged in a face-to-face manner and can be contacted with or separated from the static contact; the first magnetic conducting piece and the static contact piece body are kept relatively static, the first magnetic conducting piece is located in a magnetic field corresponding to the conductive part of the movable spring body and located between the movable contact and the fixed end in the extension direction of the movable spring body, and the first magnetic conducting piece is suitable for attracting the movable spring body to be close to the static contact piece body when the movable spring body is powered on; therefore, the movable contact and the static contact resist the electric repulsive force and are kept in a closed conduction state. The contact part provided by the embodiment of the utility model can improve the anti-short-circuit performance of the relay.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of relays, and particularly relates to a contact part and a magnetic latching relay. BACKGROUND

[0002] In the electrical engineering industry, a relay is widely used as a control device, which has a control system (also known as an input loop) and a controlled system (also known as an output loop), and is usually applied to an automatic control circuit. The relay is actually an "automatic switch" for controlling a larger current with a smaller current. Therefore, the relay plays a role in automatic regulation, safety protection, and conversion of a circuit.

[0003] The magnetic latching relay is a kind of relay. In the existing magnetic latching relay, when working, a short-circuit current causes a fault, a large electrodynamic repulsive force is formed between the moving contact and the stationary contact, the moving contact and the stationary contact are forced to be repelled and form a strong fault arc under the action of the electrodynamic repulsive force, which can cause damage to the relay, and even explosion of the relay.

[0004] Therefore, the electrodynamic repulsive force between the moving contact and the stationary contact needs to be overcome to improve the working reliability and product quality of the magnetic latching relay. In the existing technology, in order to solve the problem, the moving spring lead-out sheet of the moving spring assembly of the magnetic latching relay is usually connected on the side of the moving spring body away from the moving contact, and the current direction of the moving spring lead-out sheet is opposite to the current direction of the moving spring body. In this way, the moving spring body is subjected to the Ampere force of the magnetic field formed by the moving spring lead-out sheet, and the contact pressure of the moving contact and the stationary contact is improved. However, in this structure, the moving spring assembly occupies a large volume, and the length of the moving spring lead-out sheet is large. Therefore, more materials are consumed and the cost is high. CONTENT OF THE INVENTION

[0005] The purpose of the embodiments of the application is to provide a contact part and a magnetic latching relay, which can solve the problem that the contact part of the existing magnetic latching relay consumes more materials and has high cost in order to ensure the working reliability.

[0006] In order to solve the above technical problems, the application is implemented as follows:

[0007] In a first aspect, the embodiments of the application provide a contact part, which comprises:

[0008] a stationary contact assembly, the stationary contact assembly comprising a stationary contact body and a stationary contact arranged on the surface of the stationary contact body;

[0009] a moving spring assembly, the moving spring assembly comprising a moving spring body and a moving contact arranged on the surface of the moving spring body, one end of the moving spring body being a fixed end and the other end being a movable end, wherein the moving contact is arranged close to the movable end;

[0010] The moving contact is arranged face-to-face with the stationary contact and can be in contact with or separated from the stationary contact;

[0011] The first magnetic conducting member is kept relatively stationary with the stationary contact body, is located in a magnetic field corresponding to a part of the moving spring body for flowing current, and is located between the moving contact and the fixed end in the extension direction of the moving spring body. The first magnetic conducting member is adapted to attract the moving spring body close 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 and remain in a closed conduction state.

[0012] Optionally, the contact part further comprises:

[0013] The second magnetic conducting member is fixed to the side of the moving spring body away from the stationary contact, and the second magnetic conducting member is fixedly connected with the conductive part of the moving spring body.

[0014] When the moving contact and the stationary contact are closed and conductive, the first magnetic conducting member and the second magnetic conducting member form a closed magnetic circuit based on the internal flow in the moving spring body and generate electromagnetic attraction.

[0015] Optionally, in the contact direction of the moving contact and the stationary contact, the part of the first magnetic conducting member for magnetic conduction is closer to the moving spring body than the stationary contact. Optionally, at least one of the first magnetic conducting member and the second magnetic conducting member is folded to form a side flange in the thickness direction of the moving spring body.

[0016] Optionally, the moving spring body comprises a plurality of moving spring branches arranged in parallel, and each of the moving spring branches is provided with the moving contact.

[0017] The part of at least one of the moving spring branches for flowing current is fixed with the second magnetic conducting member, and each of the second magnetic conducting members corresponds to one of the first magnetic conducting members.

[0018] Optionally, the part of each of the moving spring branches for flowing current is fixed with the second magnetic conducting member.

[0019] Optionally, the second magnetic conducting member and the moving spring body are fixed together by welding, riveting or bonding.

[0020] Optionally, in the extension direction of the moving spring body, the part of the stationary contact body for flowing current and the part of the moving spring body for flowing current are respectively located on both sides of the stationary contact.

[0021] Optionally, the first magnetic conducting member is fixedly connected with the stationary contact body or the fixed end of the moving spring body.

[0022] Optionally, the moving spring assembly further comprises a moving spring lead-out sheet, and the fixed end of the moving spring body is riveted and fixed to the moving spring lead-out sheet.

[0023] The first magnetic conducting member has a mounting portion riveted and fixed to the static contact body at the same riveting and fixing point as the static contact, or the first magnetic conducting member is riveted and fixed to the moving spring lead-out sheet at the same riveting and fixing point as the moving spring body.

[0024] Optionally, the riveting and fixing points of the first magnetic conducting member to the static contact body or the moving spring body are at least two.

[0025] Optionally, along the width direction of the moving spring body, both sides of the second magnetic conducting member are folded in the thickness direction of the moving spring body to form side flanges, and the side flanges abut against the side walls of the moving spring body.

[0026] Optionally, the second magnetic conducting member is fixed to the moving spring body at a position close to the static contact.

[0027] Optionally, an arc-shaped bending portion is arranged between the movable end and the fixed end of the moving spring body, and the second magnetic conducting member is fixed between the bending portion and the static contact.

[0028] Optionally, the first magnetic conducting member and the second magnetic conducting member each have a magnetic conducting flat plate, and when the moving contact and the static contact are in contact, the magnetic conducting flat plates are parallel to the part of the moving spring body for flowing current.

[0029] In a second aspect, the application further provides a magnetic latching relay comprising the contact part as described in the first aspect of the application.

[0030] In the embodiments of the application, the first magnetic conducting member is in the magnetic field corresponding to the part of the moving spring body for flowing current, the first magnetic conducting member collects most of the magnetic field and can magnetize the first magnetic conducting member, so that the magnetic attraction force in the direction of the contact pressure is generated between the first magnetic conducting member and the moving spring body, the moving spring body is attracted to the static contact body, the moving contact and the static contact can resist the electric repulsion caused by the short-circuit current, thereby maintaining the closed conduction state, and the working reliability of the relay can be improved. In addition, in the embodiments of the application, the contact attraction performance of the moving contact and the static contact against short-circuit is enhanced by means of the magnetic attraction force, without using more copper materials to make a moving spring assembly with larger structure, which also helps to reduce the amount and cost of copper materials.

[0031] In addition, the contact portion of other embodiments of this application has the following advantages: 1) By setting the second magnetic conductive element, a closed magnetic circuit can be formed, which helps to gather more magnetic lines of force, reduce magnetic leakage, and improve magnetic efficiency. This can enhance the magnetic attraction force and help ensure that the moving contact and the stationary contact resist the electric repulsion force with a larger and more stable magnetic attraction force, preventing the moving contact and the stationary contact from being bounced apart, and enhancing the short-circuit resistance performance; 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 the magnetic attraction force. 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

[0032] Figure 1 This is a schematic diagram of the first type of contact portion according to an embodiment of this application;

[0033] Figure 2 This is a schematic diagram of a moving spring assembly according to an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the second type of contact portion according to an embodiment of this application;

[0035] Figure 4 This is an embodiment of the present application. Figure 3 Sectional view at position AA;

[0036] Figure 5 This is a schematic diagram of the third type of contact portion in an embodiment of this application;

[0037] Figure 6 This is an embodiment of the present application. Figure 5 Sectional view at position BB;

[0038] Figure 7 This is a schematic diagram of the third type of contact portion in an embodiment of this application;

[0039] Figure 8 This is an embodiment of the present application. Figure 7 Sectional view at position CC;

[0040] Figure 9is a schematic view of a fourth contact part according to an embodiment of the application;

[0041] Figure 10 is a schematic view of a sixth contact part according to an embodiment of the application; Figure 9 cross-sectional view at the position of D-D;

[0042] Figure 11 is an isometric view of a moving spring body according to an embodiment of the application;

[0043] Figure 12 is an isometric view of the position relationship between a moving spring body and a stationary contact body according to an embodiment of the application;

[0044] Figure 13 is a schematic view of a fifth contact part according to an embodiment of the application;

[0045] Figure 14 is a schematic view of a sixth contact part according to an embodiment of the application; Figure 13 cross-sectional view at the position of E-E;

[0046] Figure 15 is a schematic view of a sixth contact part according to an embodiment of the application;

[0047] Figure 16 is a schematic view of a sixth contact part according to an embodiment of the application; Figure 15 cross-sectional view at the position of F-F.

[0048] Reference signs:

[0049] stationary contact assembly - 10, stationary contact body - 101, stationary contact point - 102, moving spring assembly - 11, moving spring body - 111, moving contact point - 112, fixed end - 111a, movable end - 111b, moving spring branch - 1111, first magnetic guide - 12, first flange - 12a, second magnetic guide - 13, second flange - 13a. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative work fall within the scope of protection of the present application.

[0051] The terms "first", "second", and the like in the description and in the claims of the present application are used for distinguishing between similar objects and not necessarily for describing a specific sequential or chronological order. It is to be understood that the use of such terms is arbitrary and made solely for the sake of providing a clear and consistent reading of the specification and the claims. Furthermore, the terms "comprising", "including", "containing", and / or "having" with reference to an element are to be interpreted as specifying the presence of that element but do not preclude the presence of one or more other elements or materials. When these terms are used, other elements can also be present. In addition, the term "and / or" is generally used herein in the sense of "and" or "or" to mean "and" or "or" and also "and / or", unless specifically indicated otherwise, or unless the context clearly indicates otherwise. The term "coupled" as used herein is intended to mean connected, although not necessarily directly, and / or communicating, although not necessarily directly.

[0052] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0053] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] The magnetic circuit system and the electromagnetic relay provided by the embodiments of the present application will be described in detail below in combination with the drawings and specific embodiments and application scenarios.

[0055] Referring to Figure 1 , a structural schematic diagram of a contact part of an embodiment of the present application is shown, the contact part of the embodiment of the present application is a contact part used in a magnetic latching relay, which is used to realize on-off control of a load circuit. The contact part comprises:

[0056] A static contact assembly 10, the static contact assembly 10 comprises a static contact body 101 and a static contact point 102 arranged on the surface of the static contact body 101;

[0057] A movable spring assembly 11 includes a movable spring body 111 and a movable contact 112 disposed on the surface of the movable spring body 111. One end of the movable spring body 111 is a fixed end 111a, and the other end is a movable end 111b. The movable contact 112 is disposed close to the movable end 111b. The movable contact 112 is disposed face-to-face with the stationary contact 102 and can contact or separate from the stationary contact 102.

[0058] The first magnetic conductive element 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 conductive element 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.

[0059] like Figure 1 The diagram shown is a structural schematic of a first type of contact portion according to an embodiment of this application. 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 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.

[0060] like Figure 2 As illustrated, 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.

[0061] In some embodiments, the moving spring assembly 11 is disposed on one side of the stationary contact assembly 10, for example... Figure 1In the schematic diagram, the moving spring assembly 11 is located at the left side of the static contact assembly 10, and at this time, the moving contact 112 is arranged face to face with the static contact 102. Since the moving spring body 111 itself has elasticity, the movable end 111b which is not fixed can swing relative to the fixed end 111a, and drive the moving contact 112 to contact or separate from the opposite static contact 102. Specifically, inside the relay, the movable end 111b of the moving spring body 111 can be connected with a pushing assembly in the relay, and when the electromagnetic coil drives the pushing assembly to move, the pushing assembly can drive the movable end 111b of the moving spring body 111 to swing.

[0062] In addition, in combination with Figure 1 In the schematic diagram, the first magnetic conducting member 12 can be fixedly installed on an insulating member which is fixed and immovable inside the relay, or can be fixed together with the fixed end 111a of the static spring body 111 or the static contact body 101, and when the moving contact 112 moves, the first magnetic conducting member 12 remains stationary. Figure 1 In the schematic diagram, the contact direction of the moving contact 112 and the static contact 102 is the first direction X, and along the first direction X, the first magnetic conducting member 12 can be located between the static contact body 102 and the moving spring body 111 and remain relatively stationary with the static contact body 102.

[0063] As Figure 1 In the schematic diagram, the contact part is also shown by a corresponding track of a dashed arrow, and the flow path of the current in the contact part is shown. When the current flows through the part of the moving spring body 111 for current conduction, a magnetic field is generated in this part. The first magnetic conducting member 12 is in the corresponding magnetic field of the moving spring body 111, the first magnetic conducting member 12 collects most of the magnetic field in the first magnetic conducting member 12 and can magnetize the first magnetic conducting member 12, so that a magnetic attraction force along the contact pressure direction is generated between the first magnetic conducting member 12 and the moving spring body 111, the magnetic attraction force attracts the moving spring body 111 to the static contact body 101, and the moving contact 112 and the static contact 102 can resist the electric repulsion force caused by the short-circuit current, thereby maintaining the closed conduction state, and the working reliability of the relay can be improved. In addition, in the embodiment of the present application, since the magnetic attraction force is used to enhance the contact attraction performance of the moving contact and the static contact against short circuit, more copper materials are not needed to make a larger moving spring assembly, and the amount and cost of copper materials can be reduced.

[0064] Optionally, with reference to any one of Figures 3 to 10 The contact part further comprises:

[0065] A second magnetic conducting member 13 is fixedly connected to the side of the moving spring body 111 away from the static contact 102, and the second magnetic conducting member 13 is arranged opposite to the first magnetic conducting member 12;

[0066] When the moving contact 112 and the stationary contact 102 are closed, the first magnetic conducting member 12 and the second magnetic conducting member 13 form a closed magnetic circuit and generate electromagnetic attraction force based on the current flowing through the moving spring body 111.

[0067] Specifically, as Figures 3 to 10 any of the above embodiments, the contact part of the present embodiment can include a second magnetic conducting member 13 in addition to the first magnetic conducting member 12. It should be noted that the second magnetic conducting member 13 and the first magnetic conducting member 12 can be magnetic conducting blocks or magnetic conducting sheets made of the same material, such as iron, cobalt, nickel, and alloys thereof. The second magnetic conducting member 13 and the moving spring body 111 can be riveted, welded, or bonded together and located on the side away from the stationary contact 102, forming a position relationship of opposite arrangement with the first magnetic conducting member 12. Figure 3 For example, the first magnetic conducting member 12 is located on the left side of the part of the moving spring body 111 for flowing current and is in a stationary state, and the second magnetic conducting member 13 is located on the right side of the part of the moving spring body 111 for flowing current and can move with the movement of the moving contact 112.

[0068] 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 inside of the moving spring body 111 magnetizes the second magnetic conducting member 13. Thus, a closed magnetic circuit around the moving spring body 111 is formed between the first magnetic conducting member 12 and the second magnetic conducting member 13, the leakage magnetic between the first magnetic conducting member 12 and the second magnetic conducting member 13 is reduced, the magnetic efficiency is higher, which helps to ensure that the moving contact 112 and the stationary contact 102 resist the electric repulsive force with greater and more stable magnetic attraction force, preventing the moving contact 112 and the stationary contact 102 from being bounced apart.

[0069] Optionally, in the contact direction of the moving contact 112 and the stationary contact 102, the part of the first magnetic conducting member 12 for magnetic conduction is closer to the moving spring body 111 than the stationary contact 102.

[0070] Specifically, in the present embodiment, along the contact direction X of the moving contact 112 and the stationary contact 102, the distance between the part of the first magnetic conducting member 12 for magnetic conduction 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 part of the first magnetic conducting member 12 for magnetic conduction is closer to the moving spring body 111 than the stationary contact 102. Thus, the magnetic concentration effect of the first magnetic conducting member 12 is better, and more reliable magnetic attraction force can be generated to resist the electric repulsive force.

[0071] Optionally, referring to Figures 3 to 10 at least one of the first magnetic conducting member 12 and the second magnetic conducting member 13 is folded to form a side portion flange along the thickness direction of the moving spring body 111.

[0072] Specifically, at least one of the first magnetic conductive member 12 and the second magnetic conductive member 13 in the embodiment of the present application can be a shape of a magnetic conductive material after being bent along the thickness direction X of the moving spring body 111 and having a flange structure.

[0073] As shown in Figure 3 and Figure 4 , the first magnetic conductive member 12 and the second magnetic conductive member 13 each have one side flange, which are respectively the first flange 12a and the second flange 13a, and the cross sections of the first magnetic conductive member 12 and the second magnetic conductive member 13 are both L-shaped, and the first flange 12a and the second flange 13a are respectively located on both sides of the width direction Y of the moving spring body 111.

[0074] As shown in Figure 5 and Figure 6 , the cross section of the first magnetic conductive member 12 is a straight line shape, and the second magnetic conductive member 13 has two second flanges 13a, and the cross section of the second magnetic conductive member 13 is a U-shaped, and the two second flanges 13a are respectively located on both sides of the width direction Y of the moving spring body 111.

[0075] As shown in Figure 7 and Figure 8 , the first magnetic conductive member 12 has two first flanges 12a, and the cross section of the first magnetic conductive member 12 is a U-shaped, and the cross section of the second magnetic conductive member 13 is a straight line shape, and the two first flanges 12a are respectively located on both sides of the width direction Y of the moving spring body 111.

[0076] As shown in Figure 9 and Figure 10 , the first magnetic conductive member 12 has two first flanges 12a, and the cross section of the first magnetic conductive member 12 is a U-shaped, and the second magnetic conductive member 13 has two second flanges 13a, and the cross section of the second magnetic conductive member 13 is a U-shaped, and the two second flanges 13a are respectively located on both sides of the width direction Y of the moving spring body 111, and the two first flanges 12a are respectively opposite to the two second flanges 13a along the first direction X.

[0077] Therefore, by means of the side flanges of the magnetic conductive members, the gap between the first magnetic conductive member 12 and the second magnetic conductive member 13 can be reduced and made closer, and the first magnetic conductive member 12 and the second magnetic conductive member 13 can wrap and shield 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.

[0078] Optionally, referring to Figure 11 and Figure 12 , the moving spring body 111 includes a plurality of moving spring branches 1111 arranged in parallel, and each of the moving spring branches 1111 is provided with the moving contact 112;

[0079] At least one of the movable spring branches 1111 is fixed with the second magnetic conductive member 13 at a portion for passing current, and each of the second magnetic conductive members 13 corresponds to one of the first magnetic conductive members 12.

[0080] Specifically, as shown in Figure 11 and Figure 12 , in one embodiment of the present application, the movable spring body 111 can include a plurality of movable spring branches 1111 arranged in parallel, each of the movable spring branches 1111 can be a metal spring leaf structure with elasticity, and the fixed ends of the plurality of movable spring branches 1111 can be connected together. The movable ends of each of the movable spring branches 1111 are provided with movable contacts 112.

[0081] By designing the movable spring body 111 into a structure of a plurality of branches in parallel, the current on the movable spring body 111 can be shunted, and for a single movable spring branch 1111, the electrodynamic repulsion force is reduced after the current is reduced.

[0082] On this basis, at least one of the movable spring branches 1111 is fixed with the second magnetic conductive member 13 at a portion for passing current, and each of the second magnetic conductive members 13 corresponds to one of the first magnetic conductive members 12, the second magnetic conductive member 13 and the first magnetic conductive member 12 on the other side of the movable spring branch 1111 form a closed magnetic loop, which can improve the performance of the corresponding movable spring branch 1111 against the electrodynamic repulsion force.

[0083] Optionally, referring to Figure 11 and Figure 12 , each of the movable spring branches 1111 is fixed with the second magnetic conductive member 13 at a portion for passing current.

[0084] Specifically, in order to ensure that each of the movable spring branches 1111 is not repelled by the electrodynamic repulsion force, each of the movable spring branches 1111 is fixed with the second magnetic conductive member 13 at a portion for passing current. For example, in Figure 11 and Figure 12 , the movable spring body 111 has three movable spring branches 1111 and three movable contacts 112, and the second magnetic conductive members 13 and the first magnetic conductive members 12 are installed on both sides of the movable spring branches 1111.

[0085] Optionally, the second magnetic conductive member 13 and the movable spring body 111 are fixed together by welding, riveting or bonding.

[0086] Specifically, in one embodiment of the present application, the second magnetic conductive member 13 and the movable spring branch 1111 can be fixed together by riveting. Thus, the two are reliably combined together.

[0087] Optionally, referring to Figure 13 and Figure 14The part of the static contactor body 101 for flowing current and the part of the moving spring body 111 for flowing current are respectively located on two sides of the static contact 102 along the extension direction of the moving spring body 111.

[0088] Specifically, in one embodiment of the present application, as shown in the schematic view, Figure 13 and Figure 14 , the moving spring body 111 extends along the Z direction shown in the figure, and the static contact 102 is taken as the reference position. The part of the static contactor body 101 for flowing current is located above the static contact 102 along the Z direction, and the part of the moving spring body 111 for flowing current is located below the static contact 102 along the Z direction. Thus, the static contactor assembly 10 and the moving spring assembly 11 form a staggered arrangement structure as shown in the schematic view. Figure 13 When the moving contact 112 and the static contact 102 are in contact and conductive, the path of the current flowing through the static contactor assembly 10 and the moving spring assembly 11 is Z-shaped, as shown by the schematic view of the dashed arrow trajectory.

[0089] With the contact part in this structure, the magnetic field generated by the static contactor body 101 when flowing current will not generate an Ampere force on the moving spring body 111 that is away from the contact direction, which can further improve the ability to resist the electrodynamic repulsive force between the static contact 102 and the moving contact 112, and the short-circuit resistance effect is better.

[0090] Optionally, the first magnetic conducting member 12 is fixedly connected with the static contactor body 101 or the fixed end 111a of the moving spring body 111.

[0091] Specifically, in some embodiments, the first magnetic conducting member 12 can be fixed together with the static contactor body 101 which is stationary. The fixed connection position of the first magnetic conducting member 12 and the static contactor body 101 can be specifically determined according to the structure and shape of the first magnetic conducting member 12, which is not limited in the embodiments of the present application. Alternatively, the first magnetic conducting member 12 can also be fixed together with the fixed end 111a of the moving spring body 111, so that the first magnetic conducting member 12 remains stationary. It should be noted that, in order to save space, the first magnetic conducting member 12 can be installed and fixed in the gap between the static contactor body 101 and the moving spring body 111.

[0092] Optionally, referring to Figure 15 and Figure 16 , the moving spring assembly 11 further comprises a moving spring lead-out sheet 113, and the fixed end 111a of the moving spring body 111 is riveted and fixed with the moving spring lead-out sheet 113.

[0093] The first magnetic conducting member 12 has a mounting portion which is riveted and fixed on the static contact body 101 at the same riveting and fixing point as the static contact 102, or the mounting portion is riveted and fixed on the dynamic spring lead-out piece 113 at the same riveting and fixing point as the dynamic spring body 111.

[0094] Specifically, in some embodiments, the dynamic spring assembly 11 further comprises a dynamic spring lead-out piece 113, and the fixed end 11a of the dynamic spring body 111 can be riveted and fixed on the dynamic spring lead-out piece 113. The dynamic spring lead-out piece 113 can extend to the outside of the relay to form a second wiring pin, and the second wiring pin can be electrically connected with a load to be controlled by the relay.

[0095] The first magnetic conducting member 12 can comprise a portion for conducting magnetism and a mounting portion for mounting and fixing. When the first magnetic conducting member 12 is fixed on the static contact body 101, the mounting portion can be arranged on the side of the static contact body 101 away from the static contact 102, and riveted and fixed at the same riveting and fixing point as the static contact 102. As shown in Figure 15 and Figure 16 As shown in the schematic, when the first magnetic conducting member 12 is fixed on the dynamic spring body 111, the mounting portion can be riveted and fixed at the riveting position of the dynamic spring body 111 and the dynamic spring lead-out piece 113. Therefore, whether the first magnetic conducting member 12 is riveted and fixed on the static contact body 101 or riveted and fixed on the dynamic spring body 111, the three different parts can be fixed together by only one riveting process by using this connection structure, which can improve the efficiency of assembly connection and avoid space occupation caused by excessive rivets.

[0096] Optionally, the riveting and fixing points of the first magnetic conducting member 12 on the static contact body 101 or the dynamic spring body 111 are at least two.

[0097] Specifically, since the rivets used for riveting are generally cylindrical, in order to prevent the first magnetic conducting member 12 from rotating relative to the static contact body 101 or the dynamic spring body 111, at least two riveting and fixing points can be arranged at the riveting position, so as to prevent the rotation of the first magnetic conducting member 12, improve the stability of the first magnetic conducting member 12, and ensure the formation of reliable magnetic attraction effect.

[0098] Optionally, referring to Figures 3 to 6 In any of the above-mentioned schemes, along the width direction Y of the dynamic spring body 111, the two sides of the second magnetic conducting member 13 are folded to form side flanges along the thickness direction of the dynamic spring body 111, and the side flanges abut against the side wall of the dynamic spring body 111.

[0099] Specifically, in combination with Figures 3 to 6In the schematic, when the second magnetic conductor 13 is folded 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, so that the second magnetic conductor 13 and the moving spring body 111 remain relatively static, thereby improving the stability of the second magnetic conductor 13 and ensuring reliable magnetic attraction effect.

[0100] For example, Figure 3 and Figure 4 In the schematic, along the width direction Y of the moving spring body 111, one side of the second magnetic conductor 13 is folded to form a second flange 13a, and the single second flange 13a abuts against one side wall of the moving spring body 111 for limiting, Figure 5 and Figure 6 In the schematic, along the width direction Y of the moving spring body 111, both sides of the second magnetic conductor 13 are folded to form two second flanges 13a, and the double second flanges 13a abut against both side walls of the moving spring body 111 for limiting.

[0101] Optionally, referring to Figures 3 to 10 Any of the above-mentioned schematics, the second magnetic conductor 13 is fixed on the moving spring body 111 near the position of the static contact 102.

[0102] Specifically, in combination with Figures 3 to 10 Any of the above-mentioned schematics, along the Z direction shown in the figure, the second magnetic conductor 13 is installed and fixed closer to the position of the upper static contact 102, so that the magnetic attraction force between the first magnetic conductor 12 and the second magnetic conductor 13 can more effectively act on the static contact 102 and the moving contact 112, and the static contact assembly 10 and the moving spring assembly 11 are more easily attracted.

[0103] Optionally, referring to Figures 3 to 10 Any of the above-mentioned schematics, an arc-shaped curved portion 111c is arranged between the movable end 111b and the fixed end 11a of the moving spring body 111, and the second magnetic conductor 13 is fixed between the curved portion 111c and the moving contact 112.

[0104] Specifically, in combination with Figures 3 to 10According to any one of the embodiments, the movable end 111b and the fixed end 11a of the movable spring body 111 are provided with an arched bending portion 111c, which can improve the flexibility and elasticity of the movable spring body 111, and is beneficial to improve the overcurrent performance and determine the rotation pivot point of the movable spring body 111. When the movable end 111b is driven to move by the push assembly, the movable end 111b of the movable spring body 111 swings in an arc trajectory with the bending portion 111c as the rotation pivot point. At this time, the second magnetic conducting member 13 can be fixed between the bending portion 111c and the movable contact 112, so that the second magnetic conducting member 13 is closer to the movable contact 112 and the static contact 102, and the magnetic attraction between the first magnetic conducting member 12 and the second magnetic conducting member 13 can reliably improve the short-circuit resistance due to the bending portion 111c between the second magnetic conducting member 13 and the movable contact 112. Optionally, the first magnetic conducting member 12 and the second magnetic conducting member 13 each have a magnetic conducting plate parallel to the part of the movable spring body 111 for flowing current.

[0105] Specifically, when the contact part simultaneously includes the first magnetic conducting member 12 and the second magnetic conducting member 13, the first magnetic conducting member 12 and the second magnetic conducting member 13 have a common feature that they each have a rectangular parallel magnetic conducting plate, which is the largest part of the magnetic conducting member. When the movable contact 112 and the static contact 102 are in contact, the magnetic conducting plates of the first magnetic conducting member 12 and the second magnetic conducting member 13 are parallel to the part of the movable spring body 111 for flowing current, thereby reducing the occupation of the internal space of the relay and being beneficial to realize the miniaturization of the relay.

[0106] The application further provides a magnetic latching relay comprising the contact part according to any one of the preceding embodiments. By applying the contact part according to any one of the preceding embodiments in the magnetic latching relay, the short-circuit resistance of the magnetic latching relay can be improved.

[0107] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the methods and apparatus of the present embodiments are not limited by the order of the steps or the sequence for performing the steps, as some steps can occur in different orders and / or concurrently with one another; for example, described methods can be performed in an order other than that described, and / or additional steps can be added, or steps can be omitted, or a combination thereof. Also, characteristics described in relation to certain examples can be combined in other examples.

[0108] The embodiments of the present application described above are merely illustrative, and the present application is not limited to the above-described specific embodiments, which are merely illustrative, but not restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims.

Claims

1. A contact portion, characterized by The contact portion comprises: a static contact assembly comprising a static contact body and a static contact point arranged on the surface of the static contact body; a dynamic spring assembly comprising a dynamic spring body and a dynamic contact point arranged on the surface of the dynamic spring body, one end of the dynamic spring body being a fixed end and the other end being a movable end, wherein the dynamic contact point is arranged close to the movable end; the dynamic contact point and the static contact point are arranged face to face and can be in contact or separated from each other; a first magnetic conducting member which is relatively static with the static contact body, is located in the magnetic field corresponding to the part of the dynamic spring body for flowing current, and is located between the dynamic contact point and the fixed end in the extension direction of the dynamic spring body, the first magnetic conducting member is adapted to attract the dynamic spring body close to the static contact body when the dynamic spring body is energized, so that the dynamic contact point and the static contact point resist the electric repulsion and keep the closed conduction state.

2. The contact portion according to claim 1, characterized in that The contact portion further comprises: a second magnetic conducting member which is fixed to the side of the dynamic spring body away from the static contact point, and the second magnetic conducting member is arranged opposite to the first magnetic conducting member; When the dynamic contact point and the static contact point are in the closed conduction state, the first magnetic conducting member and the second magnetic conducting member form a closed magnetic circuit based on the current flowing in the dynamic spring body and generate electromagnetic attraction.

3. The contact portion according to claim 2, characterized in that In the contact direction of the dynamic contact point and the static contact point, the part of the first magnetic conducting member for magnetic conduction is closer to the dynamic spring body than the static contact point.

4. The contact portion of claim 2, wherein At least one of the first magnetic conducting member and the second magnetic conducting member is folded to form a side flange in the thickness direction of the dynamic spring body.

5. The contact portion of claim 2, wherein The dynamic spring body comprises a plurality of dynamic spring branches arranged in parallel, and each of the dynamic spring branches is provided with the dynamic contact point; At least one of the dynamic spring branches is fixed with the second magnetic conducting member for flowing current, and each of the second magnetic conducting members corresponds to one of the first magnetic conducting members.

6. The contact portion of claim 5, wherein Each of the dynamic spring branches is fixed with the second magnetic conducting member for flowing current.

7. The contact portion of claim 2, wherein The second magnetic conducting member and the dynamic spring body are fixed together by welding, riveting or bonding.

8. The contact portion according to claim 1, wherein In the extension direction of the dynamic spring body, the part of the static contact body for flowing current and the part of the dynamic spring body for flowing current are respectively located on the two sides of the static contact point.

9. The contact portion of claim 1, wherein The first magnetic conducting member is fixedly connected with the fixed end of the static contact body or the dynamic spring body.

10. The contact portion of claim 9, wherein The dynamic spring assembly further comprises a dynamic spring lead-out sheet, and the fixed end of the dynamic spring body is riveted and fixed with the dynamic spring lead-out sheet; The first magnetic conducting member has a mounting portion which is riveted and fixed on the static contact body with the same riveting fixing point as the static contact point, or is riveted and fixed on the dynamic spring lead-out sheet with the same riveting fixing point as the dynamic spring body.

11. The contact portion of claim 10, wherein The riveting fixing points of the first magnetic conducting member and the static contact body or the dynamic spring body are at least two.

12. The contact portion of claim 2, wherein The second magnetic conducting member is folded in the thickness direction of the moving spring body to form side flanges on both sides of the second magnetic conducting member along the width direction of the moving spring body, and the side flanges abut against the side walls of the moving spring body.

13. The contact portion of claim 2, wherein, The second magnetic conducting member is fixed to the moving spring body at a position close to the stationary contact.

14. The contact portion of claim 13, wherein, An arc-shaped bending portion is arranged between the movable end and the fixed end of the moving spring body, and the second magnetic conducting member is fixed between the bending portion and the moving contact.

15. The contact portion of claim 2, wherein, The first magnetic conducting member and the second magnetic conducting member each have a magnetic conducting flat plate, and the magnetic conducting flat plate is parallel to the part of the moving spring body for flowing current when the moving contact and the stationary contact are in contact.

16. A magnetic latching relay, characterized by A contact part comprising any one of claims 1 to 15.

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