Relay and magnetic circuit structure thereof

Abstract

The invention provides a relay and a magnetic circuit structure thereof. The magnetic circuit structure comprises a yoke assembly, a coil rack, an iron core assembly and a magnetic conductive cylinder. A U-shaped yoke of the yoke assembly comprises two positioning contact parts arranged at an interval in the first direction and a connecting part connected between the two positioning contact parts, and a yoke plate is connected to a first connecting end part to jointly define a containing space; the coil rack is arranged in the accommodating space and is provided with a through hole; the iron core assembly is accommodated in the through hole and comprises a movable iron core and a static iron core, and a first area, corresponding to the static iron core, of the iron core assembly and a second area, corresponding to the movable iron core, of the iron core assembly are defined; the magnetic conductive cylinder is partially accommodated in the through hole and is arranged between the movable iron core and the hole wall of the through hole; a first gap between the position, corresponding to the first area, of the hole wall of the through hole and the first area is smaller than a second gap between the magnetic conductive cylinder and the second area. And positioning structures are respectively arranged between the end surfaces of the two first connecting end parts and the first surface of the yoke plate.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electric control devices, and particularly to a relay and its magnetic circuit structure. Background Art

[0002] A relay belongs to an electronic control device, which has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is usually applied to an automatic control circuit. The essence of a relay can be understood as an "automatic switch device" that uses a smaller current to control a larger current. Therefore, a relay is mainly used in a circuit to achieve functions such as automatic regulation, safety protection, and circuit conversion.

[0003] In the design scheme of existing high-voltage DC relays, the magnetic circuit part of the relay includes components such as a yoke iron assembly, a coil, a magnetic conduction cylinder, and an iron core assembly. The coil is wound around a bobbin, and the iron core assembly is accommodated in a through hole of the bobbin. The iron core assembly includes a static iron core and a moving iron core arranged along the axial direction of the through hole, and the magnetic conduction cylinder is sleeved between the moving iron core and the through hole. However, in the existing scheme, the gap between the magnetic conduction cylinder and the moving iron core is too small, and the magnetic conduction cylinder is likely to exert extrusion on the moving iron core, causing the moving iron core to be misaligned and damaged, affecting the stability of the relay. Moreover, the yoke iron assembly includes a U-shaped yoke iron and a yoke iron plate, and the yoke iron plate is connected to the two end parts of the U-shaped yoke iron. However, the assembly difficulty between the U-shaped yoke iron and the yoke iron plate is relatively large, and misalignment is likely to occur during the assembly process, resulting in the relative deviation of the axes of the magnetic conduction cylinder and the moving iron core. At the same time, the riveting force of the U-shaped yoke iron is unbalanced and inclined, driving the magnetic conduction cylinder to squeeze the moving iron core. Summary of the Invention

[0004] A main object of the present disclosure is to overcome at least one defect of the above-mentioned prior art, and to provide a magnetic circuit structure in which the magnetic conduction cylinder is not likely to squeeze the moving iron core and the assembly effect between the U-shaped yoke iron and the yoke iron plate is better.

[0005] To achieve the above object, the present disclosure adopts the following technical solutions:

[0006] According to one aspect of the present disclosure, a magnetic circuit structure is provided, which includes a yoke assembly, a coil frame, a core assembly and a magnetic conductive cylinder; the yoke assembly includes a U-shaped yoke and a yoke plate, the U-shaped yoke includes two positioning contact parts and a connecting part, the two positioning contact parts are arranged at intervals along a first direction, the connecting part is connected between the two positioning contact parts, the positioning contact part has a first connecting end part facing away from the connecting part, the two ends of the yoke plate are respectively connected to the two first connecting ends, the yoke plate has a first surface facing the U-shaped yoke, the U-shaped yoke and the yoke plate jointly enclose a accommodating space; the coil frame is arranged in the accommodating space and is provided with a through hole extending through the second direction, the second direction is perpendicular to the first direction and parallel to the positioning contact part; the core assembly is connected to the first surface and accommodated in the through hole In the embodiment, the core assembly includes a static core and a moving core arranged along the second direction, the static core is closer to the yoke plate than the moving core, the area of the core assembly corresponding to the static core is defined as the first area, and the area of the core assembly corresponding to the moving core is defined as the second area; the magnetic cylinder is connected to the connecting portion and partially accommodated in the through hole, the magnetic cylinder is arranged between the moving core and the hole wall of the through hole; wherein, there is a first gap between the position of the hole wall of the through hole corresponding to the first area and the first area, there is a second gap between the magnetic cylinder and the second area, and the first gap is smaller than the first gap; wherein, positioning structures are respectively arranged between the end faces of the two first connecting ends and the first surface, for positioning the relative positions of the U-shaped yoke and the yoke plate in a direction parallel to the first surface.

[0007] According to one embodiment of the present disclosure, the core assembly also includes a metal shell, the metal shell is partially accommodated in the through hole, and the static iron core and the moving iron core are respectively accommodated in the metal shell; wherein the first area is the part of the metal shell corresponding to the static iron core, and the second area is the part of the metal shell corresponding to the moving iron core.

[0008] According to one embodiment of the present disclosure, a first protrusion is provided on a portion of the hole wall of the through hole corresponding to the first area, and the first gap is a gap between an end of the first protrusion facing away from the hole wall and an outer surface of the first area of the metal shell.

[0009] According to one of the embodiments of the present disclosure, wherein: the through hole has a first opening away from the magnetic conductive cylinder, the position of the static iron core is arranged corresponding to the position of the first opening, the first protrusion is arranged at a position where the hole wall of the through hole is adjacent to the first opening; and / or, along the first direction, the first protrusion is staggered with the second area.

[0010] According to one embodiment of the present disclosure, wherein: the first protrusion is a ring structure, and the first protrusion is arranged along the entire circumference of the inner periphery of the through hole; alternatively, at least two of the first protrusions are provided on a part of the hole wall of the through hole corresponding to the first region, and the at least two first protrusions are arranged at intervals along the inner periphery of the through hole.

[0011] According to one embodiment of the present disclosure, a first chamfer structure is provided at an edge of an end of the first protrusion facing away from the hole wall of the through hole.

[0012] According to one embodiment of the present disclosure, along the radial direction of the through hole, the width of the static iron core is greater than the width of the moving iron core, and the periphery of the static iron core extends beyond the periphery of the moving iron core.

[0013] According to one embodiment of the present disclosure, the iron core assembly further includes a metal shell, a part of the metal shell is accommodated in the through hole, and the static iron core and the moving iron core are respectively accommodated in the metal shell; wherein, the first region is the part of the metal shell corresponding to the static iron core, the second region is the part of the metal shell corresponding to the moving iron core, and the width of the part of the metal shell corresponding to the first region is greater than the width of the part of the metal shell corresponding to the second region.

[0014] According to one embodiment of the present disclosure, wherein: the static iron core and the yoke iron plate are relatively independent components, and the static iron core is connected to the yoke iron plate; alternatively, the static iron core and the yoke iron plate are an integral structure.

[0015] According to one embodiment of the present disclosure, wherein: the magnetic conduction cylinder and the U-shaped yoke iron are relatively independent components, and the magnetic conduction cylinder is connected to the connecting part; alternatively, the magnetic conduction cylinder and the U-shaped yoke iron are an integral structure.

[0016] According to one embodiment of the present disclosure, two ends of the yoke iron plate are respectively riveted and connected to the two positioning contact parts.

[0017] According to one embodiment of the present disclosure, the first gap is greater than or equal to 0.

[0018] According to one embodiment of the present disclosure, a second protrusion is provided on the hole wall of the through hole, and the second protrusion abuts against the magnetic conduction cylinder to limit the movement of the magnetic conduction cylinder in the second direction.

[0019] According to one embodiment of the present disclosure, the positioning structure includes a positioning protrusion and a positioning groove. The positioning protrusion is disposed on one of the end face of the first connection end portion and the first surface, and the positioning groove is disposed on the other of the end face of the first connection end portion and the first surface. The positioning protrusion and the positioning groove are in positioning cooperation, and the groove wall of the positioning groove surrounds all the side walls of the positioning protrusion.

[0020] According to one embodiment of the present disclosure, the positioning protrusion is disposed on the end face of the first connection end portion, and the positioning groove is disposed on the first surface of the yoke iron plate.

[0021] According to one embodiment of the present disclosure, along the first direction, the thickness of the positioning protrusion is less than or equal to the thickness of the positioning contact portion.

[0022] According to one embodiment of the present disclosure, wherein: the outer side face of the positioning contact portion facing away from the other positioning contact portion extends beyond the positioning protrusion along the first direction; wherein, the end face of the yoke iron plate in the first direction is flush with the outer side face of the corresponding positioning contact portion; and / or, for one positioning contact portion, the positioning protrusion provided thereon faces the inner side face of the other positioning contact portion and is flush with the inner side face of the positioning contact portion facing the other positioning contact portion.

[0023] According to one embodiment of the present disclosure, along the third direction perpendicular to the first direction and parallel to the first surface, the width of the positioning protrusion is less than the width of the positioning contact portion.

[0024] According to one embodiment of the present disclosure, bosses are respectively provided at both ends of the end face of the first connection end portion along the third direction, and the two bosses and the end face together form a through groove which penetrates the positioning contact portion along the first direction; wherein, both ends of the body of the yoke iron plate respectively protrude along the first direction to form second connection end portions, and at least a part of the second connection end portions is located in the through groove, and the positioning groove is disposed on the first surface of the second connection end portion.

[0025] According to one embodiment of the present disclosure, along the third direction, the width of the second connection end portion is less than the width of the body.

[0026] According to one embodiment of the present disclosure, wherein: the positioning groove is a counterbore with an opening of the groove opening on the first surface; or, the positioning groove is a through groove which penetrates the yoke iron plate along the thickness direction of the yoke iron plate.

[0027] According to one embodiment of the present disclosure, one of the positioning contact parts is provided with one positioning protrusion; wherein, along a third direction perpendicular to the first direction and parallel to the first surface, the positioning protrusion is located at the middle position of the end surface of the first connection end portion.

[0028] According to one embodiment of the present disclosure, the positioning structure includes at least two positioning protrusions, and the at least two positioning protrusions are arranged at intervals along the second direction.

[0029] According to one embodiment of the present disclosure, wherein: the number of the positioning protrusions included in the positioning structure is an odd number; wherein, along the second direction, the positioning protrusion located in the middle is located at the middle position of the end surface of the first connection end portion; and / or, the number of the positioning protrusions included in the positioning structure is an even number; wherein, along the second direction, the center point of the connection line between the two positioning protrusions located in the middle corresponds to the middle position of the end surface of the first connection end portion.

[0030] According to one embodiment of the present disclosure, the depth of the positioning groove is greater than or equal to the protruding height of the positioning protrusion.

[0031] According to one embodiment of the present disclosure, wherein: a second chamfer structure is provided at the edge of one end of the positioning protrusion inserted into the positioning groove; and / or, a third chamfer structure is provided in a region of the groove wall of the positioning groove adjacent to the notch.

[0032] According to one embodiment of the present disclosure, the U-shaped yoke is riveted to the yoke plate.

[0033] Another main object of the present disclosure is to overcome at least one defect of the above-mentioned prior art, and to provide a relay adopting the above-mentioned magnetic circuit structure.

[0034] To achieve the above object, the present disclosure adopts the following technical solutions:

[0035] According to another aspect of the present disclosure, there is provided a relay, which includes the magnetic circuit structure proposed by the present disclosure and described in the above embodiments.

[0036] It can be seen from the above technical solutions that the advantages and positive effects of the relay and its magnetic circuit structure proposed by the present disclosure are as follows:

[0037] The magnetic circuit structure proposed by the present disclosure includes a yoke iron assembly, a bobbin, an iron core assembly, and a magnetic conduction cylinder; the U-shaped yoke iron of the yoke iron assembly includes two positioning contact parts arranged at intervals in a first direction and a connecting part connected between the two positioning contact parts, and the yoke iron plate is connected to the first connecting end to jointly enclose an accommodating space; the bobbin is arranged in the accommodating space and is provided with a through hole; the iron core assembly is accommodated in the through hole and includes a movable iron core and a static iron core, and a first area corresponding to the static iron core and a second area corresponding to the movable iron core of the iron core assembly are defined; the magnetic conduction cylinder is partially accommodated in the through hole and is arranged between the movable iron core and the hole wall of the through hole; a first gap between the position of the hole wall of the through hole corresponding to the first area and the first area is smaller than a second gap between the magnetic conduction cylinder and the second area; positioning structures are respectively arranged between the first connecting ends of the two positioning contact parts and the first surface of the yoke iron plate. Through the above design, since there is at least a part of the area between the through hole and the iron core assembly with a first gap smaller than the second gap, when the magnetic conduction cylinder is inclined, the bobbin at the first gap contacts the static iron core first, thereby avoiding the magnetic conduction cylinder contacting the second area and squeezing the movable iron core, and ensuring the stability of the relay. Moreover, the present disclosure can utilize the positioning structure to realize the assembly positioning of the U-shaped yoke iron and the yoke iron plate in the direction parallel to the first surface, ensure the coaxiality of the magnetic conduction cylinder and the movable iron core, and prevent the U-shaped yoke iron from tilting due to unbalanced riveting force and driving the magnetic conduction cylinder to squeeze the movable iron core. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] By considering the following detailed description of the preferred embodiments of the present disclosure in conjunction with the accompanying drawings, various objects, features, and advantages of the present disclosure will become more apparent. The drawings are only exemplary diagrams of the present disclosure and are not necessarily drawn to scale. In the drawings, the same reference numerals always represent the same or similar components. Among them:

[0039] Figure 1 is a schematic cross-sectional view of a relay shown according to an exemplary embodiment;

[0040] Figure 2 is Figure 1 a schematic cross-sectional view of the magnetic circuit part of the relay shown;

[0041] Figure 3 is Figure 1 an enlarged view of part A in;

[0042] Figure 4 is Figure 1 a three-dimensional exploded schematic view of a part of the structure of the relay shown;

[0043] Figure 5 is Figure 4 a three-dimensional structural schematic view of the U-shaped yoke iron shown;

[0044] Figure 6 is Figure 4Schematic plan view of the yoke iron plate shown;

[0045] Figure 7 and Figure 8 are respectively schematic cross-sectional views of the magnetic circuit part of the relay shown according to two other exemplary embodiments;

[0046] Figure 9 is a partially enlarged schematic cross-sectional view of the relay shown according to another exemplary embodiment;

[0047] Figure 10 is Figure 9 Schematic three-dimensional structure view of the U-shaped yoke iron shown;

[0048] Figure 11 is a schematic three-dimensional structure view of the U-shaped yoke iron of the relay shown according to another exemplary embodiment;

[0049] The description of the reference numerals is as follows:

[0050] 100. Coil holder; 501. First surface;

[0051] 101. Through hole; 510. Positioning groove;

[0052] 110. First protrusion; 520. Body;

[0053] 111. First chamfer structure; 530. Second connecting end;

[0054] 120. Second protrusion; 600. Frame piece;

[0055] 210. Static iron core; 710. First elastic member;

[0056] 220. Moving iron core; 720. Push rod member;

[0057] 230. Metal shell; 730. Second elastic member;

[0058] 300. Magnetic conduction cylinder; 800. Insulating cover;

[0059] 400. U-shaped yoke iron; D1 - D2. Thickness;

[0060] 410. Positioning contact part; G1. First gap;

[0061] 4101. First connecting end; G2. Second gap;

[0062] 411. Positioning protrusion; H1. Depth;

[0063] 412. Boss; W1 - W7. Width;

[0064] 413. Through slot; X. First direction;

[0065] 420. Connection part; Y. Second direction;

[0066] 500. Yoke iron plate; Z. Third direction. Detailed implementation mode

[0067] Typical embodiments embodying the features and advantages of the present disclosure will be described in detail in the following description. It should be understood that the present disclosure can have various variations in different embodiments, all of which do not depart from the scope of the present disclosure, and the descriptions and drawings therein are for illustrative purposes in essence and not for limiting the present disclosure.

[0068] In the following description of different exemplary embodiments of the present disclosure, reference is made to the accompanying drawings, which form a part of the present disclosure, and in which different exemplary structures, systems, and steps that can implement various aspects of the present disclosure are shown by way of example. It should be understood that other specific solutions of components, structures, exemplary devices, systems, and steps can be used, and structural and functional modifications can be made without departing from the scope of the present disclosure. Moreover, although terms such as "above", "between", "inside", etc. may be used in this specification to describe different exemplary features and elements of the present disclosure, these terms are used herein only for convenience, for example, according to the directions of the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional direction of the structure to fall within the scope of the present disclosure.

[0069] The relay proposed by the present disclosure is described by taking the relay installed in the medium-high voltage module as an example. It is easy for those skilled in the art to understand that, in order to apply the relevant designs of the present disclosure to other types of relays, various modifications, additions, substitutions, deletions, or other changes are made to the following specific implementation modes, and these changes are still within the scope of the principle of the relay proposed by the present disclosure.

[0070] Refer to Figures 1 to 6 as shown Figure 1 A cross-sectional schematic diagram of the relay proposed by the present disclosure is representatively shown therein, in which some structures such as the housing are hidden; Figure 2 A cross-sectional schematic diagram of the magnetic circuit part of the relay is representatively shown therein, in which structures such as the U-shaped yoke iron 400 are hidden, and two of its parts are specifically enlarged and shown to display the enlarged structures of the first gap G1 and the second gap G2; Figure 3 Representatively shown in Figure 1 an enlarged view of part A in Figure 4 A three-dimensional exploded schematic diagram of part of the structure of the relay is representatively shown therein, in which the three-dimensional exploded structure of the U-shaped yoke iron 400 and the yoke iron plate 500 is specifically shown; Figure 5FIG. 0 schematically shows a three-dimensional structure of the U-shaped yoke 400; Figure 6 FIG. 1 schematically shows a planar view of the yoke plate 500. The structures, connection manners, and functional relationships of the main components of the relay proposed in the present disclosure will be described in detail below with reference to the above-mentioned drawings.

[0071] As Figures 1 to 6 shown, in an embodiment of the present disclosure, the magnetic circuit structure proposed in the present disclosure includes a yoke assembly, a bobbin 100, a core assembly, and a magnetic conduction cylinder 300. The yoke assembly is accommodated in the housing and includes a U-shaped yoke 400 and a yoke plate 500. The U-shaped yoke 400 includes two positioning contact portions 410 and a connecting portion 420. The two positioning contact portions 410 are arranged at intervals along a first direction X. The connecting portion 420 is connected between the two positioning contact portions 410. The positioning contact portion 410 has a first connecting end portion 4101 facing away from the connecting portion 420. Both ends of the yoke plate 500 are respectively connected to the two first connecting end portions 4101. The yoke plate 500 has a first surface 501 facing the U-shaped yoke 400. The U-shaped yoke 400 and the yoke plate 500 jointly enclose an accommodation space. The bobbin 100 is disposed in the above accommodation space of the yoke assembly and is provided with a through hole 101 penetrating along a second direction Y. The second direction Y is perpendicular to the first direction X and parallel to the positioning contact portion 410. The bobbin 100 is used for winding a coil. The core assembly is connected to the first surface 501 of the yoke plate 500 and is accommodated in the through hole 101 of the bobbin 100. The core assembly includes a stationary core 210 and a movable core 220 arranged along the second direction Y. The stationary core 210 is closer to the yoke plate 500 than the movable core 220. A region of the core assembly corresponding to the stationary core 210 is defined as a first region, and a region of the core assembly corresponding to the movable core 220 is defined as a second region. The magnetic conduction cylinder 300 is connected to the connecting portion 420 of the U-shaped yoke 400 and is partially accommodated in the through hole 101. The magnetic conduction cylinder 300 is disposed between the movable core 220 and the hole wall of the through hole 101. On this basis, there is a first gap G1 between the position of the hole wall of the through hole 101 corresponding to the first region and the first region of the core assembly, and there is a second gap G2 between the magnetic conduction cylinder 300 and the second region of the core assembly. The first gap G1 is smaller than the second gap G2. Moreover, positioning structures are respectively provided between the end faces of the two first connecting end portions 4101 and the first surface 501 of the yoke plate 500, that is, two positioning structures are provided between the U-shaped yoke 400 and the yoke plate 500. The positioning structure is used to position the relative positions of the U-shaped yoke 400 and the yoke plate 500 in a direction parallel to the first surface 501.

[0072] With the above design, since there is at least a partial area between the through hole 101 and the iron core assembly with a first gap G1 smaller than the second gap G2, when the magnetic conduction cylinder 300 tilts, the coil holder 100 at the first gap G1 contacts the static iron core 210 first, thereby preventing the magnetic conduction cylinder 300 from contacting the second area of the iron core assembly and squeezing the moving iron core 220, ensuring the stability of the relay. Moreover, the present disclosure can utilize the positioning structure to realize the assembly positioning of the U-shaped yoke 400 and the yoke plate 500 in the direction parallel to the first surface 501, ensuring the coaxiality of the magnetic conduction cylinder 300 and the moving iron core 220, and preventing the U-shaped yoke 400 from driving the magnetic conduction cylinder 300 to squeeze the moving iron core 220 due to unbalanced riveting force and causing tilt. Accordingly, in the assembly process of the present disclosure, the positioning of the U-shaped yoke and the yoke plate can be realized at the beginning of the assembly through the positioning structure first, ensuring the coaxiality of the magnetic conduction cylinder and the moving iron core after assembly, and then using the fitting gap between the upper part of the coil holder and the static iron core (metal shell) to prevent the magnetic conduction cylinder from squeezing the moving iron core.

[0073] It should be noted that on the basis of the design concept that the width W1 of the first gap G1 is smaller than the width W2 of the second gap G2, the first gap G1 can be 0 (as Figure 7 shown), or the first gap G1 can also be a specifically existing gap structure, that is, the through hole 101 of the coil holder 100 and the first area of the iron core assembly can also adopt a contact fit, specifically, it can be a butt joint fit, an interference fit, etc.

[0074] It should be noted that the "end part" of some components described in this specification refers to a partial area adjacent to one end of the component, that is, other areas except the middle area of the component. In addition, the "end face" of some components described in this specification refers to the end face of the end part of the component. For example, if the first connection end part 4101 is an end part of the positioning contact part 410 facing away from the connection part 420, the end face of the first connection end part 4101 refers to the end face of the first connection end part 4101 facing away from the connection part 420, that is, the end face of the first connection end part 4101 parallel to the first direction X and parallel to the third direction Z.

[0075] Such as Figure 2As shown, in an embodiment of the present disclosure, the aperture diameters of the through hole 101 are equal at various positions along the second direction Y, that is, the through hole 101 has a pore structure with a uniform inner diameter. On this basis, the width of the static iron core 210 in the radial direction can be greater than the width of the dynamic iron core 220, thereby realizing the design concept that the width W1 of the first gap G1 is smaller than the width W2 of the second gap G2. Among them, when the static iron core 210 and the dynamic iron core 220 are respectively in a cylindrical structure, the widths of the static iron core 210 and the dynamic iron core 220 in the radial direction can be understood as their outer diameters. In some embodiments, in order to realize the design concept that the width W1 of the first gap G1 is smaller than the width W2 of the second gap G2, the bobbin 100 can also be changed. For example, the structure at different positions of its through hole 101, then the widths of the static iron core 210 and the dynamic iron core 220 in the radial direction can also be not limited to the above design of this embodiment.

[0076] Referring to Figure 7 , Figure 7 FIG. shows a cross-sectional view of the magnetic circuit part of a relay that can embody the principle of the present disclosure in another exemplary embodiment, and specifically magnifies two parts thereof to show the enlarged structures of the first gap G1 and the second gap G2.

[0077] As Figure 7 shown, in an embodiment of the present disclosure, the iron core assembly may further include a metal shell 230. The metal shell 230 is partially accommodated in the through hole 101. For example, one end of the metal shell 230 away from the magnetic conduction cylinder 300 is connected to the yoke iron plate 500, and the other end extends into the through hole 101 of the bobbin 100. The static iron core 210 and the dynamic iron core 220 are respectively accommodated in the metal shell 230. On this basis, the first region of the iron core assembly can be understood as the part of the metal shell 230 corresponding to the static iron core 210, and the second region of the iron core assembly can be understood as the part of the metal shell 230 corresponding to the dynamic iron core 220. Through the above design, the present disclosure can further ensure the sealing performance of the iron core assembly by using the metal shell 230.

[0078] As Figure 7As shown, in an embodiment of the present disclosure, a first protrusion 110 may be provided on a portion of the hole wall of the through hole 101 corresponding to the first region. Accordingly, the above-mentioned first gap G1 is the gap between one end of the first protrusion 110 facing away from the hole wall and the outer surface of the first region of the metal shell 230. Through the above design, the present disclosure does not need to change the structures of the static iron core 210 and the metal shell 230, nor does it need to change the overall hole shape of the through hole 101 of the bobbin 100. The design concept that the width W1 of the first gap G1 is less than the width W2 of the second gap G2 can be achieved by using the first protrusion 110. In some embodiments, the iron core assembly may not include the metal shell 230. On this basis, a first protrusion 110 may still be provided on a portion of the hole wall of the through hole 101 corresponding to the first region, and this is not limited to this embodiment.

[0079] As Figure 7 shown, based on the design of providing the first protrusion 110 on the through hole 101, in an embodiment of the present disclosure, the through hole 101 has a first hole opening away from the magnetic conduction cylinder 300 (i.e., close to the yoke iron plate 500), and the position of the static iron core 210 is correspondingly arranged with the position of the first hole opening. On this basis, the first protrusion 110 may be provided at a position where the hole wall of the through hole 101 is adjacent to the first hole opening.

[0080] Based on the design of providing the first protrusion 110 on the through hole 101, in an embodiment of the present disclosure, the first protrusion 110 may be a ring structure, and the first protrusion 110 is arranged along the circumference of the inner periphery of the through hole 101. Through the above design, by using the first protrusion 110 in a ring structure, the present disclosure is beneficial to achieving that the first gap G1 at each position in the circumferential direction of the iron core assembly is less than the second gap G2. Accordingly, when the magnetic conduction cylinder 300 is inclined in any direction, it is further ensured that the bobbin 100 at the first gap G1 can contact the static iron core 210 first, further ensuring the stability of the relay.

[0081] As Figure 7As shown, based on the design that the first protrusion 110 is provided on the through hole 101 and the first protrusion 110 is a ring structure, in an embodiment of the present disclosure, along the third direction Z (for example, the radial direction of the through hole 101), the ratio of the width W3 of the ring structure corresponding to the first protrusion 110 to the radius of the through hole 101 can be 0.1 to 0.5, such as 0.1, 0.2, 0.3, 0.4, 0.5, etc. Through the above design, the present disclosure can avoid the width W3 of the first protrusion 110 being too large and overly occupying the channel of the through hole 101, and at the same time can avoid the width W3 of the first protrusion 110 being too small and unable to ensure that the width W1 of the first gap G1 is less than the width W2 of the second gap G2. In some embodiments, the ratio of the width W3 of the ring structure corresponding to the first protrusion 110 to the radius of the through hole 101 can also be less than 0.1, or greater than 0.5, such as 0.09, 0.51, etc., and the width W3 of the ring structure corresponding to the first protrusion 110 can be specifically designed flexibly according to the gap between the metal shell 230 and the hole wall of the through hole 101, and is not limited to this embodiment.

[0082] Different from Figure 7 In the shown embodiment, the design of using the first protrusion 110 as a ring structure is adopted. In other embodiments of the present disclosure, at least two first protrusions 110 can be provided on the part of the hole wall of the through hole 101 corresponding to the first region, and the at least two first protrusions 110 are arranged at intervals along the inner circumference of the through hole 101.

[0083] As Figure 7 As shown, in an embodiment of the present disclosure, along the second direction Y, the first protrusion 110 and the second region can be arranged staggeredly, that is, the first protrusion 110 does not overlap with the second region. Through the above design, when the first protrusion 110 contacts the iron core assembly, the present disclosure can avoid the first protrusion 110 contacting the second region of the iron core assembly, thereby avoiding the first protrusion 110 affecting the moving iron core 220 in the second region, avoiding the moving iron core 220 from getting stuck in movement, and ensuring the stability of the movement function of the iron core assembly.

[0084] As Figure 7As shown, based on the design of the first protrusion 110 provided on the through hole 101, in an embodiment of the present disclosure, a first chamfer structure 111 may be provided at the edge of one end of the first protrusion 110 facing away from the hole wall of the through hole 101 (i.e., the end facing the iron core assembly). Through the above design, the present disclosure can enhance the structural strength of the first protrusion 110 by using the first chamfer structure 111. At the same time, the present disclosure can utilize the above first chamfer structure 111 to provide a guiding function during the assembly process of the iron core assembly (such as the metal shell 230) extending into the through hole 101 of the bobbin 100, improving the assembly efficiency and accuracy. At the same time, when the magnetic guide cylinder 300 is tilted and the first protrusion 110 contacts the first area of the iron core assembly, the wear of the first protrusion 110 on the iron core assembly (such as the metal shell 230) can be reduced, preventing the problem of scraping chips. Further, the first chamfer structure 111 of the first protrusion 110 may be, but is not limited to, an arc chamfer or an inclined surface chamfer.

[0085] It should be noted that based on the design of the first protrusion 110 provided on the through hole 101, when the first gap G1 is a specific void structure, or when the first gap G1 is 0 and the first protrusion 110 and the iron core assembly are only in contact fit (i.e., non-interference fit), on the basis of ensuring that the first protrusion 110 is arranged at the position of the hole wall of the through hole 101 corresponding to the first area, the arrangement area of the first protrusion 110 along the second direction Y can extend to the mating part of the actuating iron core 220 and the static iron core 210, and even further extend towards the moving iron core 220. Furthermore, when the first gap G1 is 0 and the first protrusion 110 and the iron core assembly are in interference fit, the interference fit part of the first protrusion 110 and the iron core assembly can only be located in the first area, thereby avoiding interfering with the movement of the moving iron core 220.

[0086] Refer to Figure 8 , Figure 8 FIG. shows a cross-sectional view of the magnetic circuit part of a relay that can embody the principle of the present disclosure in another exemplary embodiment, and specifically magnifies two parts thereof to show the enlarged structures of the first gap G1 and the second gap G2.

[0087] As Figure 8 shown, still taking the design in which the iron core assembly includes the metal shell 230 as an example, in an embodiment of the present disclosure, the width of the static iron core 210 in the radial direction may be greater than the width of the moving iron core 220 in the radial direction (for example, the outer diameter of the static iron core 210 is greater than the outer diameter of the moving iron core 220). On this basis, the periphery of the static iron core 210 extends beyond the periphery of the moving iron core 220.

[0088] As Figure 4As shown, when the iron core assembly includes the metal shell 230, since the part of the metal shell 230 corresponding to the first region matches the size of the static iron core 210, the width of the part of the metal shell 230 corresponding to the first region is greater than the width of the part of the metal shell 230 corresponding to the second region. Among them, the through hole 101 can have a pore structure with uniform pore diameters at each position. On this basis, the design concept that the width W1 of the first gap G1 is less than the width W2 of the second gap G2 can still be achieved.

[0089] In an embodiment of the present disclosure, the static iron core 210 and the yoke iron plate 500 can be relatively independent components, and the static iron core 210 is connected to the yoke iron plate 500. In some embodiments, the static iron core 210 and the yoke iron plate 500 can also adopt an integral structure. For example, the static iron core 210 can be formed by integral stamping of the yoke iron plate 500, and this is not limited to this embodiment.

[0090] In an embodiment of the present disclosure, the magnetic conduction cylinder 300 and the U-shaped yoke iron 400 can be relatively independent components, and the magnetic conduction cylinder 300 is connected to the connecting part 420 of the U-shaped yoke iron 400. In some embodiments, the magnetic conduction cylinder 300 and the U-shaped yoke iron 400 can also adopt an integral structure. For example, the magnetic conduction cylinder 300 can be formed by integral stamping of the connecting part 420, and this is not limited to this embodiment.

[0091] In an embodiment of the present disclosure, the two ends of the yoke iron plate 500 and the two positioning contact parts 410 of the U-shaped yoke iron 400 can respectively adopt riveting connections. Through the above design, since the riveting connection between the yoke iron plate 500 and the U-shaped yoke iron 400 causes the magnetic conduction cylinder 300 to exert extrusion on the moving iron core 220, the present disclosure can be suitable for the application in the above embodiment, further avoiding the magnetic conduction cylinder 300 from contacting the second region and extruding the moving iron core 220, and ensuring the stability of the relay.

[0092] As Figure 2 、 Figure 7 and Figure 8 shown, in some embodiments of the present disclosure, a second protrusion 120 can also be provided on the pore wall of the through hole 101. The second protrusion 120 abuts against the magnetic conduction cylinder 300, and the second protrusion 120 can limit the movement of the magnetic conduction cylinder 300 along the second direction Y, further improving the assembly and positioning effect of the magnetic conduction cylinder 300 in the through hole 101 of the coil holder 100.

[0093] As Figure 1 、 Figure 3 and Figure 4As shown, in an embodiment of the present disclosure, the positioning structure may include a positioning protrusion 411 and a positioning groove 510. The positioning protrusion 411 is disposed on the end face of the first connection end portion 4101, and the positioning groove 510 is disposed on the first surface 501. The positioning protrusion 411 is in positioning cooperation with the positioning groove 510, and the groove wall of the positioning groove 510 surrounds all the side walls of the positioning protrusion 411. Through the above design, since the groove wall of the positioning groove 510 surrounds all the side walls of the positioning protrusion 411, a guiding function can be achieved during the assembly process of the U-shaped yoke 400 and the yoke plate 500, reducing the assembly difficulty and optimizing the assembly effect. In some embodiments, when the positioning structure includes a positioning protrusion and a positioning groove, the positioning protrusion may also be disposed on the first surface 501, and the positioning groove may also be disposed on the end face of the first connection end portion 4101. In other words, in various possible embodiments that conform to the design concept of the present disclosure, the positioning protrusion is disposed on one of the end face of the first connection end portion and the first surface, and the positioning groove is disposed on the other of the end face of the first connection end portion and the first surface.

[0094] It should be noted that, in Figure 3 and Figure 4 the embodiment shown, the description is given by taking "the positioning protrusion 411 is disposed on the end face of the first connection end portion 4101 of the positioning contact portion 410, and the positioning groove 510 is disposed on the yoke plate 500" as an example. On this basis, the positioning groove 510 may be a counterbore, that is, only one side of the counterbore is the notch, and the notch opens on the first surface 501. In some embodiments, when the positioning groove 510 is disposed on the yoke plate 500, the positioning groove 510 may also be a through groove (which can also be understood as a through hole), and the through groove penetrates the yoke plate 500 along the thickness direction of the yoke plate 500 (such as the second direction Y). Furthermore, the positioning protrusion may also be disposed on the first surface 501 of the yoke plate 500, and the positioning groove may be correspondingly disposed on the end face of the first connection end portion 4101, and all are not limited to the above embodiments.

[0095] As Figure 3 shown, in an embodiment of the present disclosure, along the first direction X, the thickness D1 of the positioning protrusion 411 may be less than or equal to the thickness D2 of the positioning contact portion 410. Through the above structural design, the present disclosure can control the thickness D1 of the positioning protrusion 411 not to be too large, thereby avoiding over-occupying the space of the first surface 501 of the yoke plate 500 to form a positioning groove 510 that cooperates with the positioning protrusion 411 and ensuring the structural strength of the yoke plate 500.

[0096] As Figure 3 and Figure 5As shown, based on the structural design that the thickness D1 of the positioning protrusion 411 is less than the thickness D2 of the positioning contact portion 410, in an embodiment of the present disclosure, the outer side surface of the positioning contact portion 410 facing away from the other positioning contact portion 410 may extend beyond the positioning protrusion 411 along the first direction X. On this basis, the end surface of the yoke iron plate 500 in the first direction X (for example, the end surface of the second connection end portion 530 in the attached drawing) may be flush with the outer side surface of the corresponding positioning contact portion 410. Through the above structural design, the present disclosure can ensure that the outer shape of the U-shaped yoke iron 400 and the yoke iron plate 500 after assembly is flatter, reduce space occupation, and can avoid the structure after assembly from generating protrusions at the connection to squeeze other components.

[0097] As Figure 3 and Figure 5 shown, based on the structural design that the thickness D1 of the positioning protrusion 411 is less than the thickness D2 of the positioning contact portion 410, in an embodiment of the present disclosure, the inner side surface of the positioning contact portion 410 facing the other positioning contact portion 410 may extend beyond the positioning protrusion 411 along the first direction X.

[0098] Refer to Figure 9 and Figure 10 shown, Figure 9 FIG. shows a partially enlarged cross-sectional schematic diagram of a relay capable of embodying the principle of the present disclosure in another exemplary embodiment, and the specific enlarged area can be referred to Figure 3 with respect to Figure 1 the enlarged area; Figure 10 FIG. representatively shows Figure 9 the three-dimensional structural schematic diagram of the U-shaped yoke iron 400 shown in

[0099] Different from Figure 3 and Figure 5 the structural design in which the inner side surface of the positioning contact portion 410 facing the other positioning contact portion 410 extends beyond the positioning protrusion 411, as Figure 9 and Figure 10 shown, in an embodiment of the present disclosure, for a positioning contact portion 410, the inner side surface of the positioning protrusion 411 provided thereon facing the other positioning contact portion 410 may be flush with the inner side surface of the positioning contact portion 410 facing the other positioning contact portion 410. Through the above structural design, the present disclosure can reduce the processing difficulty of the positioning protrusion 411 on the positioning contact portion 410, and at the same time can enhance the structural strength of the positioning protrusion 411.

[0100] As Figure 4As shown, in an embodiment of the present disclosure, along the third direction Z perpendicular to the first direction X and parallel to the first surface 501, the width W4 of the positioning protrusion 411 can be smaller than the width W5 of the positioning contact portion 410. Through the above structural design, the present disclosure can control the width W4 of the positioning protrusion 411 not to be too large, thereby avoiding overly occupying the space of the first surface 501 of the yoke iron plate 500 to form a positioning groove 510 that cooperates with the positioning protrusion 411, and ensuring the structural strength of the yoke iron plate 500.

[0101] As Figures 4 to 6 shown, in an embodiment of the present disclosure, one positioning protrusion 411 is provided on at least one positioning contact portion 410. On this basis, along the third direction Z perpendicular to the first direction X and parallel to the first surface 501, the positioning protrusion 411 can be located at the middle position of the end surface of the first connection end portion 4101. Through the above structural design, the present disclosure can simplify the structural complexity and at the same time ensure the balance of the riveting forces at both ends of the U-shaped yoke 400.

[0102] Referring to Figure 11 shown, Figure 11 FIG. shows a perspective structural view of the U-shaped yoke 400 of a relay that can embody the principle of the present disclosure in another exemplary embodiment.

[0103] Different from Figures 4 to 6 the structural design in the shown embodiment where one positioning protrusion 411 is provided on one positioning contact portion 410, as Figure 11 shown, in an embodiment of the present disclosure, for one positioning contact portion 410, at least two positioning protrusions 411 can be provided thereon. For example, but not limited to, the two shown in the drawings, and the at least two positioning protrusions 411 provided on the same positioning contact portion 410 are arranged at intervals along the third direction Z. Through the above structural design, the present disclosure can further improve the positioning effect between the U-shaped yoke 400 and the yoke iron plate 500 and the guiding effect during assembly.

[0104] As Figure 11As shown, based on the structural design in which at least two positioning protrusions 411 are provided on a positioning contact portion 410, in an embodiment of the present disclosure, for a positioning contact portion 410, when the number of positioning protrusions 411 provided thereon is an even number (such as two, four, etc.), along the third direction Z, the center point of the connection line between the two middle positioning protrusions 411 can correspond to the middle position of the end face of the first connection end portion 4101. Through the above structural design, the present disclosure can further ensure the balance of the riveting forces at both ends of the U-shaped yoke 400, and ensure that the forces at the positioning positions of the U-shaped yoke 400 and the yoke plate 500 are more uniform. In some embodiments, for a positioning contact portion 410, the number of positioning protrusions 411 provided thereon is an odd number (such as three, five, etc.). At this time, along the third direction Z, the middle positioning protrusion 411 can be located at the middle position of the end face of the first connection end portion 4101. It is not limited to the above embodiments.

[0105] As Figures 4 to 6 or Figure 11 As shown, in an embodiment of the present disclosure, regardless of whether the number of positioning protrusions 411 provided on a single positioning contact portion 410 is one or at least two, the number of positioning protrusions 411 provided on the two positioning contact portions 410 can be equal, and the positioning protrusions 411 provided on the two positioning contact portions 410 can be arranged in one-to-one correspondence. Through the above structural design, the present disclosure can further ensure the balance of the riveting forces at both ends of the U-shaped yoke 400.

[0106] As Figures 4 to 6 As shown, in an embodiment of the present disclosure, bosses 412 can be respectively provided at both ends of the end face of the first connection end portion 4101 along the third direction Z. These two bosses 412 and the end face of the first connection portion 420 together form a through groove 413, and the through groove 413 penetrates the positioning contact portion 410 along the first direction X. On this basis, both ends of the body 520 of the yoke plate 500 can respectively protrude along the first direction X to form second connection end portions 530. Accordingly, at least a part of the second connection end portion 530 is located in the through groove 413, and the positioning groove 510 is provided on the first surface 501 of the second connection end portion 530. Through the above structural design, on the basis of using the positioning protrusions 411 and the positioning grooves 510 to achieve the positioning and guiding functions, the present disclosure can use the through groove 413 and the second connection end portion 530 to achieve additional positioning and guiding functions, further improving the positioning effect of the U-shaped yoke 400 and the yoke plate 500, and further reducing the assembly difficulty.

[0107] As Figure 6 As shown, based on the structural design in which the body 520 of the yoke plate 500 protrudes to form the second connection end portion 530, in an embodiment of the present disclosure, along the third direction Z, the width W6 of the second connection end portion 530 can be smaller than the width W7 of the body 520.

[0108] As Figure 3 shown, in an embodiment of the present disclosure, the depth H1 of the positioning groove 510 may be equal to the protruding height of the positioning protrusion 411. Through the above design, the present disclosure can enable the positioning protrusion 411 to be completely received in the positioning groove 510 and can achieve the fitting of the first surface 501 and the end surface of the first connection end portion 4101, thereby further optimizing the assembly effect. In some embodiments, the depth H1 of the positioning groove 510 may also be greater than the protruding height of the positioning protrusion 411, and it is not limited to this embodiment.

[0109] In an embodiment of the present disclosure, a second chamfer structure may be provided at the edge of the end of the positioning protrusion 411 away from the positioning contact portion 410, such as but not limited to a bevel chamfer or an arc chamfer. Through the above structural design, the present disclosure can utilize the second chamfer structure to provide a guiding function during the process of inserting the positioning protrusion 411 into the positioning groove 510, further reducing the assembly difficulty between the U-shaped yoke 400 and the yoke plate 500.

[0110] In an embodiment of the present disclosure, a third chamfer structure may be provided in the region of the groove wall of the positioning groove 510 adjacent to the notch, such as but not limited to a bevel chamfer or an arc chamfer. Through the above structural design, the present disclosure can utilize the third chamfer structure to provide a guiding function during the process of inserting the positioning protrusion 411 into the positioning groove 510, further reducing the assembly difficulty between the U-shaped yoke 400 and the yoke plate 500.

[0111] It should be noted here that the magnetic circuit structures shown in the drawings and described in this specification are only several examples of the many magnetic circuit structures that can adopt the principles of the present disclosure. It should be clearly understood that the principles of the present disclosure are by no means limited to any details or any components of the magnetic circuit structures shown in the drawings or described in this specification.

[0112] Based on the above detailed description of several exemplary embodiments of the yoke assembly proposed by the present disclosure, an exemplary embodiment of the relay proposed by the present disclosure will be described below.

[0113] As Figure 1 shown, in an embodiment of the present disclosure, the relay proposed by the present disclosure includes a housing and the magnetic circuit structure proposed by the present disclosure and described in detail in the above embodiments, and the magnetic circuit structure is received in the housing.

[0114] As Figure 1 shown, in an embodiment of the present disclosure, the relay proposed by the present disclosure may further include a base, an insulating cover 800, a pair of static contacts, an arc extinguishing portion, and a moving assembly. Wherein, the housing and the base are connected and form a chamber for receiving the insulating cover 800, at least part of the static contacts, the arc extinguishing portion, the moving assembly, and the magnetic circuit structure.

[0115] As Figure 1 shown, in an embodiment of the present disclosure, a pair of static contacts are mounted on the top of the insulating cover 800. At least a part of each static contact is located inside the insulating cover 800, and a static contact point is further provided at the bottom of each static contact. Two openings are provided at the position corresponding to the top of the insulating cover 800 on the housing, and a pair of static contacts extend out of the outer surface of the housing through the two openings. One static contact serves as the terminal for current inflow, and the other static contact serves as the terminal for current outflow.

[0116] As Figure 1 shown, in an embodiment of the present disclosure, the insulating cover 800 can be made of ceramic material, that is, the insulating cover 800 can be a ceramic cover, but not limited thereto. For example, in other embodiments, the insulating cover 800 can also be made of plastic material.

[0117] As Figure 1 shown, in an embodiment of the present disclosure, the insulating cover 800 is connected to the yoke iron plate 500 through the frame piece 600. The frame piece 600 can be a metal piece with a ring-shaped structure, such as iron-nickel alloy. One end of the frame piece 600 is connected to the opening edge of the insulating cover 800, for example, by laser welding, brazing, resistance welding, gluing, etc. The other end of the frame piece 600 is connected to the yoke iron plate 500, and can also be connected by laser welding, brazing, resistance welding, gluing, etc. A frame piece 600 is provided between the insulating cover 800 and the yoke iron plate 500, which facilitates the connection between the insulating cover 800 and the yoke iron plate 500.

[0118] As Figure 1 shown, in an embodiment of the present disclosure, the moving assembly is movably arranged in the chamber formed by the housing and the base. The moving assembly includes a moving contact, a first elastic member 710, and a push rod member 720. Among them, the moving contact is arranged inside the insulating cover 800, and both ends of the moving contact are respectively used to contact or separate from the bottoms of a pair of static contacts.

[0119] In an embodiment of the present disclosure, the moving contact can include a contact body and two moving contact points. The moving contact points can be separate parts, and the two moving contact points are connected to both ends of the contact body. Of course, in other embodiments, the two moving contact points can also be integrally formed at both ends of the contact body. In addition, the moving contact points can protrude from the side surface of the contact body facing the static contact, or can be flush with the side surface of the contact body facing the static contact.

[0120] In an embodiment of the present disclosure, the push rod member 720 is movably inserted through the first through hole of the yoke iron plate 500, and a part of the push rod member 720 extends out of the side surface of the yoke iron plate 500 facing the static contact, and a part of the push rod member 720 extends out of the side surface of the yoke iron plate 500 facing away from the static contact.

[0121] The moving contact is movably mounted on a portion of the push rod member 720 that extends out of the yoke iron plate 500 toward the static contact on the side surface. The first elastic member 710 is connected to the push rod member 720 and the moving contact, and is used to apply an elastic force to the moving contact in the direction toward the static contact to provide contact pressure.

[0122] As Figure 1 shown, in an embodiment of the present disclosure, a metal shell 230 is further covered on the side surface of the yoke iron plate 500 facing away from the static contact, and the metal shell 230 covers the first through hole of the yoke iron plate 500. Wherein, a portion of the push rod member 720 that extends out of the yoke iron plate 500 on the side surface facing away from the static contact is inserted into the metal shell 230.

[0123] As Figure 1 shown, in an embodiment of the present disclosure, the magnetic circuit structure includes a moving iron core 220, a static iron core 210, a bobbin 100, and a coil. The bobbin 100 is in a hollow cylindrical shape and is made of an insulating material. The bobbin 100 is located on the side of the yoke iron plate 500 facing away from the static contact and surrounds the outer periphery of the metal shell 230. The coil is wound around the outer periphery of the bobbin 100.

[0124] As Figure 1 shown, in an embodiment of the present disclosure, the static iron core 210 is fixedly arranged in the metal shell 230, and a part of the static iron core 210 is inserted into the first through hole. The static iron core 210 has a second through hole, and the position of the second through hole corresponds to that of the first through hole, so that the push rod member 720 can movably pass through the first through hole and the second through hole. The moving iron core 220 is movably arranged in the metal shell 230 and is arranged opposite to the static iron core 210. The moving iron core 220 is connected to the push rod member 720 and is used to be attracted by the static iron core 210 when the coil is energized. The moving iron core 220 and the push rod member 720 can be connected by screwing, riveting, welding or other means.

[0125] As Figure 1 shown, in an embodiment of the present disclosure, the magnetic circuit structure further includes a second elastic member 730. The second elastic member 730 is located in the metal shell 230 and is arranged between the static iron core 210 and the moving iron core 220, and is used to reset the moving iron core 220 when the coil is de-energized.

[0126] It should be noted that when the coil is energized, the static iron core 210 attracts the moving iron core 220 to move upward, and the moving iron core 220 can drive the push rod member 720 to move upward. When the moving contact contacts the static contact, the moving contact is blocked by the static contact, while the push rod member 720 will still continue to move upward until the over-travel is completed.

[0127] During the over-travel, the first elastic member 710 can provide an elastic force to the moving contact after being squeezed by the push rod member 720 to provide contact pressure.

[0128] It should be noted here that the relays shown in the drawings and described in this specification are only a few examples of the many types of relays that can adopt the principles of the present disclosure. It should be clearly understood that the principles of the present disclosure are by no means limited to any details or any components of the relays shown in the drawings or described in this specification.

[0129] In summary, the magnetic circuit structure proposed by the present disclosure includes a yoke iron assembly, a bobbin 100, an iron core assembly, and a magnetic conduction cylinder 300. The U-shaped yoke iron 400 of the yoke iron assembly includes two positioning contact portions 410 arranged at intervals in the first direction X and a connecting portion 420 connected between the two positioning contact portions 410. The yoke iron plate 500 is connected to the first connection end portion 4101 of the positioning contact portion 410 to jointly enclose an accommodation space. The bobbin 100 is disposed in the accommodation space and is provided with a through hole 101. The iron core assembly is accommodated in the through hole 101 of the bobbin 100 and includes a moving iron core 220 and a stationary iron core 210. A first region corresponding to the stationary iron core 210 and a second region corresponding to the moving iron core 220 of the iron core assembly are defined. The magnetic conduction cylinder 300 is partially accommodated in the through hole 101 and is disposed between the moving iron core 220 and the hole wall of the through hole 101. A first gap G1 between the position of the hole wall of the through hole 101 corresponding to the first region and the first region is smaller than a second gap G2 between the magnetic conduction cylinder 300 and the second region. Positioning structures are respectively provided between the first connection end portions 4101 of the two positioning contact portions 410 and the first surface 501 of the yoke iron plate 500. Through the above design, since there is at least a partial region between the through hole 101 and the iron core assembly having a first gap G1 smaller than the second gap G2, when the magnetic conduction cylinder 300 is tilted, the bobbin 100 at the first gap G1 contacts the stationary iron core 210 first, thereby avoiding the magnetic conduction cylinder 300 contacting the second region of the iron core assembly and squeezing the moving iron core 220, ensuring the stability of the relay. Moreover, the present disclosure can utilize the positioning structure to realize the assembly positioning of the U-shaped yoke iron 400 and the yoke iron plate 500 in the direction parallel to the first surface 501, ensure the coaxiality of the magnetic conduction cylinder and the moving iron core, and prevent the U-shaped yoke iron from driving the magnetic conduction cylinder 300 to squeeze the moving iron core 220 due to unbalanced riveting force and causing inclination.

[0130] Exemplary embodiments of the relay and its magnetic circuit structure proposed by the present disclosure have been described and / or illustrated in detail above. However, the embodiments of the present disclosure are not limited to the specific embodiments described herein. On the contrary, the components and / or steps of each embodiment can be used independently and separately from the other components and / or steps described herein. Each component and / or each step of one embodiment can also be used in combination with the other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated herein, the terms "a", "one", and "above" etc. are used to indicate the existence of one or more elements / components / etc. The terms "comprising", "including", and "having" are used to mean an open inclusion and refer to the existence of additional elements / components / etc. in addition to the listed elements / components / etc. Further, the terms "first" and "second" etc. in the claims and the specification are used only as labels and are not numerical limitations on their objects.

[0131] Although the relay and its magnetic circuit structure proposed by the present disclosure have been described in accordance with different specific embodiments, those skilled in the art will recognize that modifications can be made to the embodiments of the present disclosure within the spirit and scope of the claims.

Claims

1. A magnetic circuit structure, characterized in that, include: A yoke assembly, comprising a U-shaped yoke and a yoke plate, wherein the U-shaped yoke comprises two positioning contact portions and a connecting portion, wherein the two positioning contact portions are arranged at intervals along a first direction, wherein the connecting portion is connected between the two positioning contact portions, wherein the positioning contact portion has a first connecting end portion facing away from the connecting portion, wherein both ends of the yoke plate are respectively connected to the two first connecting end portions, wherein the yoke plate has a first surface facing the U-shaped yoke, and wherein the U-shaped yoke and the yoke plate jointly enclose an accommodation space; A coil frame, disposed in the accommodation space and provided with a through hole penetrating along a second direction, wherein the second direction is perpendicular to the first direction and parallel to the positioning contact portion; An iron core assembly connected to the first surface and accommodated in the through hole, the iron core assembly comprising a static iron core and a moving iron core arranged along the second direction, the static iron core being closer to the yoke iron plate than the moving iron core, a region of the iron core assembly corresponding to the static iron core being defined as a first region, and a region of the iron core assembly corresponding to the moving iron core being defined as a second region; as well as A magnetic conductive cylinder, connected to the connecting portion and partially accommodated in the through hole, wherein the magnetic conductive cylinder is arranged between the moving iron core and the hole wall of the through hole; There is a first gap between the position of the hole wall of the through hole corresponding to the first area and the first area, there is a second gap between the magnetic conductive cylinder and the second area, and the first gap is smaller than the first gap; Wherein, positioning structures are respectively arranged between the end faces of the two first connecting ends and the first surface, for positioning the relative positions of the U-shaped yoke and the yoke plate in a direction parallel to the first surface.

2. The magnetic circuit structure according to claim 1, characterized in that The core assembly also includes a metal shell, which is partially accommodated in the through hole, and the static iron core and the moving iron core are respectively accommodated in the metal shell; wherein the first area is the part of the metal shell corresponding to the static iron core, and the second area is the part of the metal shell corresponding to the moving iron core.

3. The magnetic circuit structure according to claim 2, characterized in that, A first protrusion is provided on a portion of the hole wall of the through hole corresponding to the first region, and the first gap is a gap between an end of the first protrusion facing away from the hole wall and an outer surface of the first region of the metal shell.

4. The magnetic circuit structure according to claim 3, characterized in that: The through hole has a first opening away from the magnetic conductive cylinder, the position of the static iron core is arranged corresponding to the position of the first opening, and the first protrusion is arranged at a position where the hole wall of the through hole is adjacent to the first opening; and / or Along the first direction, the first protrusion and the second area are staggered.

5. The magnetic circuit structure according to claim 3, characterized in that: The first protrusion is an annular structure, and the first protrusion is arranged along the inner circumference of the through hole; or A portion of the hole wall of the through hole corresponding to the first region is provided with at least two first protrusions, and the at least two first protrusions are arranged at intervals along the inner circumference of the through hole.

6. The magnetic circuit structure according to claim 1, wherein Along the radial direction of the through hole, the width of the static iron core is greater than the width of the moving iron core, and the periphery of the static iron core exceeds the periphery of the moving iron core.

7. The magnetic circuit structure according to claim 6, characterized in that, The iron core assembly further includes a metal shell, a part of the metal shell is received in the through hole, and the stationary iron core and the moving iron core are respectively received in the metal shell; wherein, the first region is the part of the metal shell corresponding to the stationary iron core, the second region is the part of the metal shell corresponding to the moving iron core, and the width of the part of the metal shell corresponding to the first region is greater than the width of the part of the metal shell corresponding to the second region.

8. The magnetic circuit structure according to claim 1, wherein: The stationary iron core and the yoke iron plate are relatively independent components, and the stationary iron core is connected to the yoke iron plate; or The stationary iron core and the yoke iron plate are of an integral structure.

9. The magnetic circuit structure according to claim 1, wherein: The magnetic conduction cylinder and the U-shaped yoke iron are relatively independent components, and the magnetic conduction cylinder is connected to the connecting portion; or The magnetic conduction cylinder and the U-shaped yoke iron are of an integral structure.

10. The magnetic circuit structure according to claim 1, characterized in that, Both ends of the yoke iron plate are respectively riveted and connected to the two positioning contact parts.

11. The magnetic circuit structure according to claim 1, characterized in that, The first gap is greater than or equal to 0.

12. The magnetic circuit structure according to any one of claims 1 to 11, characterized in that, The positioning structure includes a positioning protrusion and a positioning groove. The positioning protrusion is provided on one of the end face of the first connection end and the first surface, and the positioning groove is provided on the other of the end face of the first connection end and the first surface. The positioning protrusion and the positioning groove are in positioning cooperation, and the groove wall of the positioning groove surrounds all the side walls of the positioning protrusion.

13. The magnetic circuit structure according to claim 12, wherein, The positioning protrusion is provided on the end face of the first connection end, and the positioning groove is provided on the first surface of the yoke iron plate.

14. The magnetic circuit structure according to claim 13, wherein Along the first direction, the thickness of the positioning protrusion is less than or equal to the thickness of the positioning contact part.

15. The magnetic circuit structure according to claim 14, wherein: The outer side surface of the positioning contact part facing away from the other positioning contact part extends beyond the positioning protrusion along the first direction; wherein, the end face of the yoke iron plate in the first direction is flush with the outer side surface of the corresponding positioning contact part and / or For one positioning contact part, the positioning protrusion provided thereon faces the inner side surface of the other positioning contact part and is flush with the inner side surface of the positioning contact part facing the other positioning contact part.

16. The magnetic circuit structure according to claim 13, wherein, Along a third direction perpendicular to the first direction and parallel to the first surface, the width of the positioning protrusion is less than the width of the positioning contact part.

17. The magnetic circuit structure according to claim 16, wherein, Convex platforms are respectively provided at both ends of the end face of the first connection end along the third direction. The two convex platforms and the end face jointly form a through groove, and the through groove penetrates the positioning contact part along the first direction; wherein, second connection ends are respectively convexly provided at both ends of the body of the yoke iron plate along the first direction, and at least part of the second connection ends are located in the through groove, and the positioning groove is provided on the first surface of the second connection ends.

18. The magnetic circuit structure according to claim 17, wherein, Along the third direction, the width of the second connection end is less than the width of the body.

19. The magnetic circuit structure according to claim 13, wherein: The positioning groove is a sunk groove with an opening of the groove opening on the first surface; or The positioning groove is a through groove, and the through groove penetrates the yoke iron plate along the thickness direction of the yoke iron plate.

20. The magnetic circuit structure according to claim 13, wherein One of the positioning protrusions is provided on at least one of the positioning contact parts; wherein, along a third direction perpendicular to the first direction and parallel to the first surface, the positioning protrusion is located at the middle position of the end surface of the first connecting end part.

21. The magnetic circuit structure according to claim 12, wherein, The positioning structure includes at least two of the positioning protrusions, and the at least two positioning protrusions are arranged at intervals along the second direction.

22. The magnetic circuit structure according to claim 12, wherein, The depth of the positioning groove is greater than or equal to the protruding height of the positioning protrusion.

23. The magnetic circuit structure according to claim 1, characterized in that, The U-shaped yoke is riveted to the yoke iron plate.

24. A relay, characterized in that, It includes the magnetic circuit structure according to any one of claims 1 to 23.

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