Coil holder and core cooperation structure, magnetic circuit part and electromagnetic relay

Abstract

The application discloses a coil holder and iron core cooperation structure, a magnetic circuit part and an electromagnetic relay, and relates to the technical field of relays. The coil holder and the iron core are arranged in the coil holder, the coil holder is provided with a winding part for winding enameled wire, the cross section of the winding part is non-circular, the outer circumferential surface of the winding part comprises an outward convex arc surface, the number of the iron cores is multiple, the multiple iron cores are in a rod shape, and the multiple iron cores are parallel to each other. The application can consider the winding size of the coil holder, electromagnetic attraction, enameled wire cost and iron core cost and other problems under the condition that the relay has a small space size, is beneficial to reducing the overall cost of the relay, and ensures that the electromagnetic attraction of the magnetic circuit part of the relay is large enough.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of relays, in particular to a coil holder and iron core cooperation structure, a magnetic circuit part and an electromagnetic relay. BACKGROUND

[0002] As an electronic control device, the relay is used to control large current by small current, and is widely used in automatic control circuit, and plays a role of automatic adjustment, safety protection and switching circuit in the circuit. With the increasingly fierce market competition and the diversification of the actual application of the relay, the relay is required to be small in size, low in cost and high in performance.

[0003] The relay is mainly composed of a contact part and a magnetic circuit part. Generally, the electromagnetic attraction of the magnetic circuit part is provided by the coil, and the counterforce is provided by the contact part. The matching degree of the electromagnetic attraction and the spring piece counterforce directly affects the number of electrical endurance of the relay. Therefore, as the source of the attraction, the rationality of the coil structure has an important influence on the attraction value, and the coil structure also directly affects the size of the enameled wire winding, that is, the cost difference of the coils with different structures is large. Therefore, the cost of the coil cannot be ignored for the overall cost of the relay. It is necessary to optimize the coil structure to obtain the best electromagnetic attraction and the optimal cost.

[0004] The magnetic circuit part of the prior art relay includes a coil holder, an iron core and a yoke, etc. The pipe wall shape of the coil holder is mostly single circular or square. The iron core is a circular iron core or a square iron core, or a square iron core structure formed by several square iron core laminations. Under the same iron core cross-sectional area, the circular iron core has a smaller circumference than the square iron core. More turns can be wound by the enameled wire with the same length, the coil electromagnetic attraction ampere-turn (IN) is larger, and the wound coil is close to a circular shape with a winding radius R. For the square structure of the iron core, the winding length L and the width W of the coil after winding, and R is between L and W. Therefore, for the case where the internal space of the relay is limited, the circular iron core is not applicable. The existing technical solution adopts a square structure of the iron core. The coil with the square structure of the iron core has strong adaptability to the internal space of the relay, but the disadvantages are low utilization rate of the enameled wire, high cost of the coil, relatively large long side size of the winding, and the square iron core part needs to be formed by die stamping, which has low material utilization rate and high part processing cost, thereby further increasing the cost of the relay. SUMMARY

[0005] The present application provides a coil holder and iron core cooperation structure, a magnetic circuit part and an electromagnetic relay, which can consider the problems of coil winding size, electromagnetic attraction, coil cost and iron core cost by structure improvement.

[0006] The technical scheme adopted by the present application to solve its technical problems is: a coil holder and iron core matching structure, comprising a coil holder and an iron core arranged in the coil holder, the coil holder having a winding part for winding enameled wire; characterized in that: the cross-sectional outer contour of the winding part is non-circular, and the outer peripheral surface of the winding part comprises an outward convex arc surface; the number of the iron cores is multiple, the multiple iron cores are respectively in the form of rods, and the multiple iron cores are parallel to each other.

[0007] Further, the cross-sectional outer contour of the winding part is flat, and the outer peripheral surface of the winding part on both sides of the length direction of the cross-section of the winding part is respectively an outward convex circular arc surface; the multiple iron cores are arranged along the length direction of the cross-section of the winding part and are located on the center line of the length direction of the cross-section of the winding part.

[0008] Further, the side surfaces of adjacent iron cores are in contact.

[0009] Further, the inner cavity of the coil holder comprises multiple iron core cavities corresponding to the multiple iron cores, the shape and size of the cross-section of the iron core cavities respectively match the shape and size of the cross-section of the iron cores; the multiple iron cores are respectively inserted into the corresponding iron core cavities.

[0010] Further, the multiple iron core cavities are arranged along the length direction of the cross-section of the winding part, and adjacent iron core cavities are laterally connected.

[0011] Further, the cross-sectional outer contour of the winding part is oval, or the cross-sectional outer contour of the winding part is in the shape of a racetrack.

[0012] Further, the cross-section of the iron core is circular, both ends of the iron core are respectively located outside the coil holder, and the diameters of the end portions of both ends of the iron core are respectively smaller than the diameter of the part between the two ends of the iron core.

[0013] The present application further provides a magnetic circuit part, comprising a yoke, and further comprising the coil holder and iron core matching structure as described above, the winding part of the coil holder is wound with enameled wire, the yoke is partially matched at one end in the axial direction of the coil holder and is fixedly connected with the multiple iron cores.

[0014] Further, the yoke is in the shape of L, and the number of the yokes is two, one side of each of the two yokes is matched at both ends of the coil holder in the axial direction, one end of each of the multiple iron cores is rivet-fixed with one side of one of the yokes, the other end of each of the multiple iron cores is rivet-fixed with one side of the other yoke, the other sides of the two yokes are located on the same side of the coil holder and are oppositely arranged; further comprising an armature part, the armature part is rotationally arranged, the other sides of the two yokes are respectively matched in the recesses on both sides of the armature part.

[0015] The application also provides an electromagnetic relay comprising the magnetic circuit part as described above.

[0016] Compared with the prior art, the application has the following beneficial effects:

[0017] 1. Since the cross-sectional outer contour of the winding part of the coil holder is non-circular and the outer circumferential surface of the winding part comprises an outward convex arc surface, the structure of the coil holder of the application is highly adaptable to the space size inside the relay, is more conducive to reducing the occupied space, and compared with the coil holder with a square cross-sectional outer contour, more turns of the enameled wire can be wound under the same core cross-sectional area and the same length of the enameled wire, thereby improving the utilization rate of the enameled wire and the electromagnetic attraction. In addition, the number of the cores is multiple, the multiple cores are rod-shaped respectively, and the multiple cores are parallel to each other, so that the application can match the winding part of the coil holder with the multiple cores, and the cores do not need to be formed by die stamping, thereby reducing the processing cost of the cores. Therefore, the application can take into account the winding size of the coil holder, the electromagnetic attraction, the cost of the enameled wire and the cost of the cores under the condition that the space size of the relay is small, which is conducive to reducing the overall cost of the relay and ensuring that the electromagnetic attraction of the magnetic circuit part of the relay is large enough.

[0018] 2. The multiple cores are arranged along the length direction of the cross section of the winding part and are located on the center line of the cross section of the winding part in the length direction, so that the arrangement mode of the multiple cores is relatively simple and easy to assemble and process. In particular, the side surfaces of the adjacent cores abut against each other, so that the multiple cores are closely arranged, which is conducive to reducing the space size of the entire coil holder.

[0019] 3. The inner cavity of the coil holder comprises multiple core cavities corresponding to the multiple cores respectively, the shape and size of the cross section of each core cavity are matched with the shape and size of the cross section of the core respectively, so that the local wall thickness size of the winding part of the coil holder is large, thereby being conducive to improving the strength of the winding part of the coil holder, so that the winding part is not easy to deform or even be damaged during the winding process.

[0020] The application will be further described in detail below in combination with the drawings and embodiments; however, the coil holder and core matching structure, the magnetic circuit part and the electromagnetic relay of the application are not limited to the embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is an exploded schematic view of the coil holder and core matching structure of the application (including yoke iron and enameled wire);

[0022] Figure 2 is a schematic view of the three-dimensional structure of the coil holder of the application;

[0023] Figure 3is a top view of the coil holder of the present application;

[0024] Figure 4 is a perspective view of the core of the present application;

[0025] Figure 5 is a schematic view of the cooperation of the core and the yoke of the present application;

[0026] Figure 6 is a perspective view of the magnetic circuit part of the present application (without the armature part);

[0027] Figure 7 is a cross-sectional view of Figure 6 ;

[0028] Figure 8 is an exploded view of the electromagnetic relay of the present application;

[0029] Figure 9 is a perspective view of the electromagnetic relay of the present application (without the housing);

[0030] Figure 10 is a sectional view of the electromagnetic relay of the present application;

[0031] In the figure, 1, moving spring part, 11, moving spring lead-out piece, 12, moving spring piece, 121, sub spring piece, 122, U-shaped bend, 123, hook, 13, moving contact, 2, push-in card, 21, card slot, 22, give-way through slot, 23, connection slot, 3, base, 31, bottom plate, 311, guide boss, 312, moving spring insertion slot, 313, static spring insertion slot, 32, surrounding wall, 321, installation slot, 322, accommodation slot, 4, armature part, 41, driving main body, 42, armature, 43, permanent magnet, 5, rotating shaft, 6, coil part, 61, coil holder, 611, winding part, 612, flange part, 613, core cavity, 614, positioning slot, 62, enameled wire, 63, core, 631, end part, 64, yoke, 641, circular through hole, 7, static spring part, 71, static spring piece, 711, insertion hole, 72, static contact, 8, guide limiting member, 9, arc separation member, 10, arc extinguishing permanent magnet, 20, magnetic separation piece, 30, housing, 40, auxiliary moving spring piece, 50, auxiliary static spring piece. DETAILED DESCRIPTION

[0032] In the description of the present application, the orientation or positional relationship indicated by "upper", "lower", "left", "right", "front", "back" and the like is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application, and does not indicate or imply that the device 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 scope of protection of the present application. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In addition, in the description of the present application, "a plurality of" means two or more, unless otherwise specified. In the description of the present application, unless otherwise specified and limited, the terms "mount", "provided with", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, can be electrically connected, can be directly connected, can be indirectly connected through an intermediate medium, can be internal communication of two elements, and for those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] Please refer to Figures 1-7 As shown in the drawings, a coil holder and core matching structure of the present application, comprising a coil holder 61 and a core 63 arranged in the coil holder 61, the coil holder 61 comprises two flange portions 612 and a hollow winding portion 611 located between the two flange portions 612 and used for winding the enameled wire 62, the two flange portions 612 respectively protrude laterally from the winding portion 611. The cross-sectional outer contour of the winding portion 611 is non-circular, and the outer peripheral surface of the winding portion 611 comprises an outward convex arc surface. Specifically, in the present embodiment, the cross-sectional outer contour of the winding portion 611 is flat, but it is not limited to this, in other embodiments, the cross-sectional outer contour of the winding portion is triangular, etc. The outer peripheral surface of the winding portion 611 on both sides of the length direction of the cross section of the winding portion 611 is an outward convex circular arc surface, that is, the cross-sectional outer contour of the winding portion 611 on both sides of the length direction is an outward convex circular arc edge, and the cross-sectional outer contour of the winding portion 611 on both sides of the width direction is a straight edge, therefore, the cross-sectional outer contour of the winding portion 611 is approximately a runway type, but it is not limited to this, in other embodiments, the cross-sectional outer contour of the winding portion 611 is elliptical.

[0035] The number of the above-mentioned cores 63 is respectively multiple, the multiple cores 63 are parallel to each other, and each core 63 is respectively rod-shaped, specifically, the cross section of each core 63 is respectively circular, but it is not limited to this, the multiple cores 63 are respectively inserted into the coil holder 61, and each core 63 respectively extends along the axial direction of the coil holder 61.

[0036] In the embodiment, the plurality of iron cores 63 are arranged along the length direction of the cross section of the winding portion 611 and are located on the center line of the cross section of the winding portion 611 in the length direction, but the arrangement form of the iron cores 63 is not limited thereto. The side surfaces of the adjacent iron cores 63 are in contact with each other, so that the plurality of iron cores 63 are closely arranged, thereby facilitating reduction of the space size of the coil holder 61.

[0037] In the embodiment, the inner cavity of the coil holder 61 includes a plurality of iron core cavities 613 corresponding to the plurality of iron cores 63, the cross section of each iron core cavity 613 is matched with the cross section of the corresponding iron core 63 in shape and size, and each iron core 63 is respectively inserted into the corresponding iron core cavity 613. Since the plurality of iron cores 63 are arranged along the length direction of the cross section of the winding portion 611, the plurality of iron core cavities 613 are also arranged along the length direction of the cross section of the winding portion 611, and the adjacent iron core cavities 613 are connected in lateral direction to make the side surfaces of the adjacent iron cores 63 in contact with each other.

[0038] In the embodiment, the number of the iron cores 63 is two, but is not limited thereto, and in other embodiments, the number of the iron cores 63 is more than two. Therefore, the number of the iron core cavities 613 is also two, and the two iron core cavities 613 are connected to form a substantially "8" shape, as shown in Figure 2 Figure 3

[0039] In the embodiment, the two ends of the iron core 63 are respectively located outside the coil holder 61, and the diameters of the end portions 631 of the two ends of the iron core 63 are respectively smaller than the diameter of the portion of the iron core 63 between the two ends, as shown in Figure 4 The two ends of the iron core 63 are used to connect the yoke 64, and the yoke 64 is connected by riveting. The end portions 631 of the two ends of the iron core 63 respectively pass through the circular through holes 641 provided on the corresponding yoke 64, and then the two ends of the iron core 63 are respectively riveted and fixed to the corresponding yoke 64 by flattening or flattening, as shown in Figure 5

[0040] ​​​The coil holder 61 structure of the application combines the advantages of two coil holders 61 in the prior art (one of which has a circular cross-sectional outer profile of the winding portion, and the other has a square cross-sectional outer profile of the winding portion), so that it is highly adaptable to the space size inside the relay, is conducive to reducing the occupied space, and compared with the coil holder in the prior art with a square cross-sectional outer profile of the winding portion, can wind more turns of the enameled wire under the same cross-sectional area and the same length of the enameled wire, thereby improving the utilization rate of the enameled wire, and further improving the electromagnetic suction. In addition, the application inserts multiple iron cores 63 in the coil holder 61, and utilizes the matching of the multiple iron cores 63 and the winding portion 611 to ensure that the overall cross-sectional magnetic area of the multiple iron cores 63 is large, thereby improving the magnetic conductivity. The iron core 63 is in a rod shape, so that the iron core 63 does not need to be stamped into shape by a mold, thereby reducing the processing cost of the iron core 63. Therefore, the application can take into account the coil holder winding size, electromagnetic suction, enameled wire cost and iron core cost and other problems under the condition that the space size of the relay is small, which is conducive to reducing the overall cost of the relay, and ensures that the electromagnetic suction of the magnetic circuit part of the relay is large enough.

[0041] Referring to Figures 1-7 The magnetic circuit part of the application includes the yoke iron 64, and further includes the coil holder and iron core matching structure of the application as described above, the winding portion 611 of the coil holder 61 is wound with the enameled wire 62, the yoke iron 64 is partially matched at one end of the coil holder 61 in the axial direction, and is fixedly connected with the multiple iron cores 63.

[0042] In the embodiment, the yoke iron 64 is in an L shape, and the number of the yoke iron 64 is two, one side of each of the two yoke irons 64 is matched at two ends of the coil holder 61 in the axial direction, one end of each of the multiple iron cores 63 is riveted and fixed with one side of each of the yoke irons 64, the other end of each of the multiple iron cores 63 is riveted and fixed with one side of the other yoke iron 64, the other side of each of the two yoke irons 64 is located at the same side of the coil holder 61 and is oppositely arranged. The two flange portions 612 of the coil holder 61 are respectively provided with the positioning groove 614 corresponding to one side of each of the two yoke irons 64, and one end of the positioning groove 614 is provided with a notch, one side of each of the two yoke irons 64 is accommodated in the positioning groove 614 of each of the two flange portions 612, as Figure 6 shown.

[0043] The magnetic circuit part of the application further includes the armature part 4 (as Figures 8-10The armature part 4 is rotatably arranged, and the other side of each yoke 64 is fitted into the recess on the two sides of the armature part 4. The armature part 4 specifically comprises an insulating driving body 41 and an armature assembly arranged on the driving body 41. The armature assembly is in the shape of an I-beam, and its four ends respectively extend out of the driving body 41. Specifically, the armature assembly is composed of two parallel armatures 42 and a permanent magnet 43 clamped between the two armatures 42. The other side of one yoke 64 is fitted between the upper ends of the two armatures 42, and the other side of the other yoke 64 is fitted between the lower ends of the two armatures 42.

[0044] Therefore, the magnetic circuit part of the present application is the magnetic circuit part of a magnetic latching relay, but is not limited to this. In other embodiments, the number of yokes is one, and the armature part is swingably arranged at the cutting edge of the yoke. Therefore, the magnetic circuit part of the present application is the magnetic circuit part of a snap-action electromagnetic relay.

[0045] Please refer to Figures 1-10 The electromagnetic relay of the present application comprises the magnetic circuit part of the present application as described above. The electromagnetic relay of the present application further comprises a base 3, a moving spring part 1, a stationary spring part 7 and a push card 2. The moving spring part 1 comprises an elastically deformable moving spring 12, a moving spring lead 11 and a moving contact 13. The upper end of the moving spring 12 is fixedly connected to the upper end of the moving spring lead 11 by riveting. The moving contact 13 is arranged on the moving spring 12 and faces away from the moving spring lead 11. Specifically, the moving contact 13 is riveted at the middle position of the moving spring 12. The stationary spring part 7 comprises a stationary spring 71 and a stationary contact 72 arranged on the stationary spring 71. The stationary contact 72 cooperates with the moving contact 13. The base 3 comprises a bottom plate 31 and two surrounding walls 32 protruding upward from the edges of the bottom plate 31. The two surrounding walls 32 are oppositely arranged. The lower end of the moving spring 12 is clamped into a clamping groove 21 arranged on the push card 2. The lower end of the moving spring lead 11 passes through a gap slot 22 arranged on the push card 2. The moving spring 12, the moving spring lead 11 and the push card 2 form a moving spring assembly. The moving spring assembly is loaded into the base 3 from top to bottom, and the lower end of the moving spring lead 11 is inserted into a moving spring insertion slot 312 arranged on the bottom plate 31 of the base. The upper end of the stationary spring 71 is arranged with the stationary contact 72, and the lower end of the stationary spring 71 is inserted into a stationary spring insertion slot 313 arranged on the bottom plate 31 of the base.

[0046] The two surrounding walls 32 of the base 3 are respectively provided with a guide limiting member 8, which limits the upper position and guides the movement of the push card 2. Specifically, the two surrounding walls 32 are respectively provided with an installation groove 321 penetrating the inner and outer wall surfaces, the guide limiting member 8 is inserted into the installation groove 321 from the outer side of the surrounding wall 32, and the guide limiting member 8 partially penetrates the installation groove 321 and protrudes from the inner side of the surrounding wall 32, so as to limit the upper position and guide the movement of the push card 2. In addition, the upper surface of the bottom plate 31 is provided with a guide boss 311, which guides and supports the movement of the push card 2. Specifically, the upper surface of the bottom plate 31 is provided with a guide boss 311 at the position where the two surrounding walls 32 are connected, and the guide boss 311 is in a strip shape and extends along the movement direction of the push card 2. The guide limiting member 8 and the guide boss 311 on the same side are matched with each other to form a guide sliding groove of the push card 2.

[0047] The coil frame 61, the enameled wire 62, the yoke 64 and the core 63 form a coil part 6, which is vertically arranged on the bottom plate 31 of the base, and the driving body 41 of the armature part 4 is rotatably connected between the two surrounding walls 32 of the base 3 by the rotating shaft 5. Therefore, the present application forms a magnetic latching relay, but is not limited to this.

[0048] The present application also includes a shell 30, which is connected to the base 3 at the bottom end and contains the static spring part 7, the dynamic spring part 1, the push card 2, the armature part 4, the coil part 6 and the like in the shell cavity. The present application also includes an auxiliary dynamic spring sheet 40 and an auxiliary static spring sheet 50, which are inserted into the base 1, the auxiliary dynamic spring sheet 40 is provided with an auxiliary dynamic contact, the auxiliary static spring sheet 50 is provided with an auxiliary static contact, and the auxiliary dynamic contact and the auxiliary static contact are matched with each other. The auxiliary dynamic spring sheet 40 is driven by the armature part 4, and the closing state of the auxiliary dynamic spring sheet 40 and the auxiliary static spring sheet 40 is the same as that of the dynamic spring part 1 and the static spring part 7.

[0049] The application also comprises two arc-extinguishing permanent magnets 10, which are respectively arranged in the accommodating grooves 322 on the outer side of the two surrounding walls 32 of the base and are covered by the magnetic separation sheet 20 to separate the outside. Specifically, the magnetic separation sheet 20 is roughly in the shape of U, the arc-extinguishing permanent magnets 10 are embedded in the magnetic separation sheet 20, and the two are arranged in the accommodating grooves 322 of the surrounding walls 32. The above-mentioned static spring sheet 7 is provided with an arc separation piece 9, which separates the electric arc generated by the disconnection of the moving contact 13 and the static contact 72 from the static spring sheet 7. When the electric arc is generated by the disconnection of the moving contact 13 and the static contact 72, the electric arc moves downward under the magnetic field of the arc-extinguishing permanent magnet 10, so that the arc root is lowered from between the contacts to between the terminals (i.e. between the static spring sheet 71 and the moving spring sheet 12). Since the arc separation piece 9 separates the electric arc from the static spring sheet 71, even if the distance between the static spring sheet 71 and the moving spring sheet 12 is very small, the potential difference that meets the continuous combustion of the electric arc cannot be formed, and thus the electric arc between the static spring sheet 71 and the moving spring sheet 12 will be quickly extinguished, thereby avoiding the serious problems of burning of the contacts, failure of the product and the like caused by the continuous combustion of the electric arc.

[0050] The coil holder and iron core cooperation structure, magnetic circuit part and electromagnetic relay of the application are the same as the prior art in the non-involved parts or can be realized by using the prior art.

[0051] The above-mentioned embodiments are only used to further illustrate the coil holder and iron core cooperation structure, magnetic circuit part and electromagnetic relay of the application, but the application is not limited to the embodiments, and any simple modification, equivalent change and modification made according to the technical essence of the application to the above-mentioned embodiments all fall within the protection scope of the technical scheme of the application.

Claims

1. A coil former and core mating structure comprising a coil former and a core disposed in the coil former, the coil former having a winding portion for winding an enameled wire; characterized by: The cross-section outer contour of the winding part is non-circular, and the outer circumferential surface of the winding part comprises convex arc surfaces; the number of the cores is multiple, the multiple cores are respectively in the shape of a bar, and the multiple cores are parallel to each other.

2. The coil former and core mating structure of claim 1, wherein: The cross-section outer contour of the winding part is flat, and the outer circumferential surface of the winding part on both sides in the length direction of the cross-section of the winding part is respectively a convex circular arc surface; the multiple cores are arranged along the length direction of the cross-section of the winding part and are located on the center line of the cross-section of the winding part in the length direction.

3. The coil former and core mating structure of claim 1, wherein: The side surfaces of the adjacent cores are in contact with each other.

4. The coil former and core mating structure of any one of claims 1-3, wherein: The inner cavity of the coil holder comprises multiple core cavities corresponding to the multiple cores respectively, the shape and size of the cross-section of the core cavities respectively match the shape and size of the cross-section of the cores; the multiple cores are respectively inserted into the corresponding core cavities.

5. The coil former and core mating structure of claim 4, wherein: The multiple core cavities are arranged along the length direction of the cross-section of the winding part, and the adjacent core cavities are connected laterally.

6. The coil former and core mating structure of any one of claims 1-3, wherein: The cross-section outer contour of the winding part is oval, or the cross-section outer contour of the winding part is in the shape of a racetrack.

7. The coil former and core mating structure of any one of claims 1-3, wherein: The cross-section of the core is circular, both ends of the core are respectively located outside the coil holder, and the diameters of the end portions of both ends of the core are respectively smaller than the diameter of the portion of the core between the two ends.

8. A magnetic circuit portion comprising a yoke characterized by: Also comprising the coil holder and core matching structure as claimed in any one of claims 1-7, the winding part of the coil holder is wound with an enameled wire, the yoke iron is partially matched at one end of the coil holder in the axial direction and is fixedly connected with the multiple cores.

9. The magnetic circuit portion according to claim 8, characterized in that: The yoke iron is in the shape of L, and the number of the yoke iron is two, one side of the two yoke irons is respectively matched at both ends of the coil holder in the axial direction, one end of the multiple cores is respectively riveted and fixed with one side of one of the yoke irons, the other end of the multiple cores is respectively riveted and fixed with one side of the other yoke iron, the other sides of the two yoke irons are located on the same side of the coil holder and are oppositely arranged; further comprising an armature part, the armature part is in the shape of rotation, and the other sides of the two yoke irons are respectively matched in the recesses on both sides of the armature part.

10. An electromagnetic relay characterized by comprising: Comprising the magnetic circuit part as claimed in claim 8 or 9. Comprising the magnetic circuit part as claimed in claim 8 or 9.

Images