CN110581005B

CN110581005B - Electromagnetic coil

Info

Publication number: CN110581005B
Application number: CN201810595367.0A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2018-06-11
Filing date: 2018-06-11
Publication date: 2022-07-19
Anticipated expiration: 2038-06-11
Also published as: CN110581005A

Abstract

The invention discloses an electromagnetic coil which comprises a framework, an enameled wire, a fusing device, an inserting piece and a lead wire, wherein the framework comprises a first flat plate part, the inserting piece 4 of the electromagnetic coil is inserted into the first flat plate part, the enameled wire is wound on a winding part of the framework through mechanical equipment, and then two ends of the enameled wire can be further wound on the inserting piece respectively, so that the working efficiency can be increased, and the enameled wire is connected with the inserting piece in an automatic winding manner.

Description

Electromagnetic coil

Technical Field

The invention relates to the technical field of refrigeration control, in particular to an electromagnetic coil.

Background

Currently, some solenoids are provided with thermal protectors for safety performance. As shown in fig. 1, fig. 1 is a structure of an electromagnetic coil with a thermal protector when an encapsulating layer is not injected, in which after a coil frame 1 'is manufactured, an enameled wire 2' is wound on the frame, then both ends (an inner enameled wire end and an outer enameled wire end) of the enameled wire 2 'are fixed by using an artificial adhesive tape paper, then an electrical insulation paper 4' with a first inserting piece 31', a second inserting piece 32' and a third inserting piece 33 'riveted is abutted against an outer surface of the enameled wire 2' wound on the frame 1', then the electrical insulation paper 4' is fixed by using the artificial adhesive tape paper, after the electrical insulation paper 4 'is fixed, one end of the enameled wire 2' is welded with the first inserting piece 31', the other end of the enameled wire 2' is welded with the third inserting piece 33', then two leads 5' are respectively welded with the second inserting piece 32 'and the third inserting piece 33', after the encapsulating layer is injected, two ends of the fusing device 3 are respectively welded with the first inserting piece 31 'and the second inserting piece 32', so that the series connection of the circuits is realized.

According to the electromagnetic coil with the structure, the enameled wire is wound on the framework, and the electric insulating paper is fixed on the outer surface of the enameled wire formed by the framework, so that mechanical equipment cannot realize the connection of the enameled wire with an automatic winding mode and the inserting piece, and only can rely on the manual work to fix the inner wire end, the outer wire end and the electric insulating paper with the adhesive tape paper, and then the winding of the enameled wire and the inserting piece is realized manually, and the working efficiency is low.

Therefore, how to provide an electromagnetic coil to realize that the enameled wire is connected with the insertion piece in an automatic winding manner is a technical problem to be solved by a person skilled in the art.

Disclosure of Invention

In order to solve the above technical problem, the present invention provides an electromagnetic coil, including:

the bobbin comprises a winding part, a first flat plate part and a second flat plate part; the outer peripheral surface of the first flat plate part is provided with a first jack, a second jack and a third jack.

An enameled wire wound around the skeleton;

a fusing device;

the insert comprises a first insert, a second insert and a third insert, wherein the first insert comprises a first inserting part and a first bending part bent relative to the first inserting part, the second insert comprises a second inserting part and a second bending part bent relative to the second inserting part, and the third insert comprises a third inserting part and a third bending part bent relative to the third inserting part;

Leads including a first lead and a second lead;

first insertion portion cartridge in first hole portion, second insertion portion cartridge in second hole portion, third insertion portion cartridge in third hole portion, the one end of enameled wire with first inserted sheet welding, the other end of enameled wire with third inserted sheet welding, first lead wire with second inserted sheet fixed connection, the second lead wire with third inserted sheet fixed connection, fuse device's both ends respectively with first inserted sheet the direct or indirect fixed connection of second inserted sheet.

According to the electromagnetic coil provided by the invention, the structure of the electromagnetic coil is further improved, the inserting piece is inserted into the first flat plate part, one end of the enameled wire is wound on the first inserting piece by mechanical equipment, then the enameled wire is wound on a winding wire by the mechanical equipment, and the other end of the enameled wire is further wound on the third inserting piece, or one end of the enameled wire is wound on the third inserting piece by the mechanical equipment, then the enameled wire is wound on the winding part by the mechanical equipment, and the other end of the enameled wire is wound on the first inserting piece, so that the working efficiency can be improved, and the automation of winding the enameled wire and the inserting piece is realized.

Drawings

FIG. 1 is a structural significance diagram of an electromagnetic coil in the prior art without an injection molding encapsulating layer;

FIG. 2 is a structural significance diagram of the electromagnetic coil provided by the invention without an injection molding encapsulating layer;

FIG. 3 is a schematic structural view of the bobbin of the solenoid of FIG. 2;

FIG. 4 is a schematic structural view of a first insert of the solenoid coil of FIG. 2;

FIG. 5 is a second schematic view of the first tab of the solenoid of FIG. 2;

FIG. 6 is a schematic diagram of a second tab of the solenoid of FIG. 2;

FIG. 7 is a second schematic illustration of a second insert of the solenoid of FIG. 2; (ii) a

FIG. 8 is a third schematic view of a second tab of the solenoid coil of FIG. 2; (ii) a

FIG. 9 is a schematic view of a third tab of the solenoid of FIG. 2;

FIG. 10 is a second schematic representation of a third insert of the solenoid of FIG. 2;

FIG. 11 is a third structural schematic view of a third insert of the solenoid coil of FIG. 2;

FIG. 12 is a structural significance diagram of the electromagnetic coil provided by the invention when the encapsulating layer 6 is injection molded;

FIG. 13 is a structural significance view of the solenoid provided by the present invention when provided with a cover;

FIG. 14 is a structural significance diagram of the solenoid of the present invention without the magnetizer assembled;

Fig. 15 is a schematic structural view of the electromagnetic coil provided by the present invention after being assembled with the magnetizer.

In fig. 2 to 15:

1. the bobbin 11, the first flat plate portion 12, the winding portion 13, the second flat plate portion 111, the flat plate portion 112, the first insertion hole 113, the second insertion hole 114, the third insertion hole 2, the enamel wire 23, the fuse device 4, the tab 5, the lead wire 6, the encapsulating layer 7, the cover 8, the magnetic conductor 41, the first tab 42, the second tab 43, the third tab 411, the first insertion portion 412, the first bending portion 4111, the first winding portion 4112, the third recess 4121, the third hole portion 421, the second insertion portion 422, the second bending portion 4221, the first hole portion 4222, the first welding portion 4223, the first recess 4224, the fourth hole portion 431, the third insertion portion 432, the third bending portion 4311, the second winding portion 4312, the fourth recess 4321, the second hole portion 4322, the second welding portion 4323, the third recess 51, the first lead wire 52, and the second lead wire.

Detailed Description

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

It should be noted that the terms upper, lower and the like in the directional terms referred to herein are defined by the positions of the components in the drawings and the positions of the components relative to each other, are only used for the sake of clarity and convenience in describing the technical solutions, and should not be construed as absolutely limiting the scope of protection; similarly, "first", "second", etc. are used merely for convenience of description to distinguish different components having the same name, do not indicate an order, and are not to be construed as limiting.

Please refer to fig. 2 to fig. 15, wherein:

FIG. 3 is a schematic structural diagram of the bobbin 1 of the solenoid of FIG. 2; FIG. 4 is a schematic diagram of the first tab 41 of the solenoid coil of FIG. 2; FIG. 5 is a second structural schematic view of the first tab 41 of the solenoid coil of FIG. 2; FIG. 6 is a schematic diagram of the second tab 42 of the solenoid of FIG. 2; FIG. 7 is a second structural schematic view of the second tab 42 of the solenoid coil of FIG. 2;

FIG. 8 is a third schematic view of the second tab 42 of the solenoid of FIG. 2; FIG. 9 is a schematic view of the third tab 43 of the solenoid of FIG. 2; FIG. 10 is a second structural schematic view of the third tab 43 of the solenoid coil of FIG. 2; FIG. 11 is a third structural schematic view of the third tab 43 of the solenoid coil of FIG. 2; FIG. 12 is a structural significance diagram of the electromagnetic coil injection molding encapsulating layer provided by the invention; FIG. 13 is a structural significance view of the solenoid provided by the present invention when provided with a cover; FIG. 14 is a structural significance diagram of the solenoid of the present invention without the magnetizer assembled; fig. 15 is a schematic structural view of the electromagnetic coil provided by the present invention after being assembled with the magnetizer.

Referring to fig. 3, the bobbin 1 of the present embodiment is an integrated structure, and includes a winding portion 12, and a first flat plate portion 11 and a second flat plate portion 13 located at two sides of the winding portion 12, wherein the winding portion 12 is used for winding an enameled wire 22, and the radial widths of the first flat plate portion 11 and the second flat plate portion 13 are greater than the radial width of the winding portion 12, such arrangement can limit the enameled wire 22 to the winding portion 12.

Three insertion holes, namely a first insertion hole 112, a second insertion hole 113 and a third insertion hole 114 are arranged on the outer peripheral surface of the first flat plate part 11, the first insertion piece 41 is fixed on the first insertion hole 112, the second insertion hole 113 is fixed with the second insertion piece 42, the third insertion hole 114 is fixed with the third insertion piece 43, at this time, the first insertion piece 41, the second insertion piece 42 and the third insertion piece 43 are in a strip shape, after the insertion of the hole part and the insertion piece 4 is completed, one end of the enameled wire 2 is firstly wound on the first insertion piece 41 by mechanical equipment, then the enameled wire 2 is wound on the winding part 12 by the mechanical equipment, and the other end of the enameled wire 2 is wound on the third insertion piece 43, or one end of the enameled wire 2 is firstly wound on the third insertion piece 43 by the mechanical equipment, then the enameled wire 2 is wound on the winding part 12 by the mechanical equipment, the other end of the enameled wire 2 is further wound on the first insertion piece 41, and then the two ends of the enameled wire 2 are respectively welded on the first insertion piece 41 and the third insertion piece 43, the present embodiment is described by taking the first mode as an example.

In order to ensure the radial insertion depth of the first insertion portion 411, the second insertion portion 421 and the third insertion portion 431 into the first flat plate portion 11 to ensure the bonding strength and to ensure the processing convenience of the electromagnetic coil provided by this embodiment, the axial projection shape of the first flat plate portion 11 may be set to be similar to a partial shape of a water drop, the outer peripheral surface of the first flat plate portion 11 is provided with a flat plate portion 111 in a planar shape, the outer periphery of the first flat plate portion 11 except for the flat plate portion 111 is similar to a major arc shape, and the first insertion hole 112, the second insertion hole 113 and the third insertion hole 114 are provided in the flat plate portion 111.

Enameled wire 2 is twined in winding portion 12 by mechanical equipment, because first inserted sheet 41, second inserted sheet 42, third inserted sheet 43 are rectangular form this moment, can twine enameled wire 2's one end in first inserted sheet 41 by mechanical equipment, treat the winding back that finishes, enameled wire 2's the other end can continue to twine in winding portion 12 by mechanical equipment, treat winding portion 12 winding back that finishes, enameled wire 2's the other end can further twine in third inserted sheet 43 by mechanical equipment, can carry out follow-up enameled wire 2 and first inserted sheet 41, the weldment work of third inserted sheet 43.

The above arrangement mode can realize that the two ends (the inner winding head and the outer winding head) of the enameled wire 2 are wound to the first inserting sheet 41 and the third inserting sheet 43 by mechanical equipment, so that similar operation is not required to be finished manually, the working efficiency is increased, and the enameled wire 2 is connected with the inserting sheets in an automatic winding mode.

In order to facilitate the installation of the subsequent fusing device 3 and the lead 5, the first inserting sheet 41, the second inserting sheet 42 and the third inserting sheet 43 are required to be bent, the first inserting sheet 41 is bent to form a first inserting portion 411 and a first bending portion 412, the second inserting portion 421 is bent to form a second inserting portion 421 and a second bending portion 422, and the third inserting sheet 43 is bent to form a third inserting portion 431 and a third bending portion 432, wherein the first inserting portion 411, the second inserting portion 421 and the third inserting portion 431 are approximately parallel to the radial direction of the first flat plate portion 11, and the first bending portion 412, the second bending portion 422 and the third bending portion 432 are approximately perpendicular to the radial direction of the first flat plate portion 11. It should be noted that the process of bending the first, second and third bending

portions

412, 422 and 432 does not necessarily need to bend the first, second and

third insertion pieces

41, 42 and 43 after the inner and outer winding ends of the enamel wire 2 are welded to the first and

third insertion pieces

41 and 43, and then the welding operation may be performed.

Referring to fig. 4 specifically, in order to improve the bonding strength between the enameled wire 2 and the first insertion sheet 41, a first winding portion 4111 integrated with the first insertion sheet 41 may be disposed on the first insertion sheet 41, that is, the first winding portion 4111 is a part of the first insertion sheet 41, and the first winding portion 4111 is bent upward or downward to form a structure similar to a "U" shape, at this time, a mechanical device winds one end of the enameled wire 2 around the first winding portion 4111, and then performs a subsequent welding operation to weld the first winding portion and the first insertion sheet 41 together, because the first winding portion 4111 is substantially in a "U" shape, the enameled wire 2 can be wound around the bending portion of the first winding portion 4111 more intensively, so as to further improve the bonding strength between the enameled wire 2 and the first insertion sheet 41, and the first winding portion 4111 is located in the first insertion portion 411 after the first insertion sheet 41 is bent.

Referring to fig. 5 specifically, in addition to the form of providing the first winding portion 4111 on the first insertion sheet 41, a third concave portion 4112 may be provided on the first insertion sheet 41, the third concave portion 4112 is formed by circumferential contraction or a circumferential portion of the first insertion sheet 41, one end of the enameled wire 2 is wound around the third concave portion 4112 by a mechanical device, and then the enameled wire 2 and the third concave portion 4112 are welded and fixed by a subsequent welding operation, due to the provision of the third concave portion 4112, the enameled wire 2 can be wound around the groove of the third concave portion 4112 more intensively, the bonding strength between the enameled wire 2 and the first insertion sheet 41 can be further improved, and the third concave portion 4112 is located on the first insertion portion 411 after the first insertion sheet 41 is bent. At this time, because the depth of the third concave portion 4112 is often relatively small, when the enameled wire 2 is wound around the third concave portion 4112, the enameled wire is easily protruded from the lower surface of the first insertion portion 411, and when the subsequent first insertion piece 41 is bent, the enameled wire 2 is easily broken by pressure, so as to cause an open circuit.

Referring to fig. 12, similarly, in order to improve the bonding strength between the enameled wire 2 and the third inserting sheet 43, a second winding portion 4311 integrated with the third inserting sheet 43 may be disposed on the third inserting sheet 43, that is, the second winding portion 4311 is a part of the third inserting sheet 43, and the second winding portion 4311 is bent upward or downward to form a structure similar to a "U" shape, at this time, a mechanical device winds one end of the enameled wire 2 around the second winding portion 4311, and then performs a subsequent welding operation to weld the two to be fixed, since the second winding portion 4311 is substantially in a "U" shape, the enameled wire 2 can be wound around the bent portion of the second winding portion 4311 more intensively, so as to further improve the bonding strength between the enameled wire 2 and the third inserting sheet 43, and the second winding portion 4311 is located at the third inserting portion 431 after the third inserting sheet 43 is bent.

Similarly, referring to fig. 11 in particular, in addition to the form of providing the second winding portion 4311 on the third insertion piece 43, a fourth concave portion 4312 may be further provided on the third insertion piece 43, where the fourth concave portion 4312 is formed by circumferential contraction or circumferential contraction of the third insertion piece 43, one end of the enameled wire 2 is wound around the fourth concave portion 4312 by mechanical equipment, and then the enameled wire 2 and the fourth concave portion 4312 are welded and fixed by subsequent welding operation, due to the provision of the fourth concave portion 4312, the enameled wire 2 can be wound around the groove of the fourth concave portion 4312 more intensively, the bonding strength between the enameled wire 2 and the third insertion piece 43 can be further improved, and the fourth concave portion 4312 is located on the third insertion portion 431 after the third insertion piece 43 is bent. At this time, since the depth of the fourth concave portion 4312 is often relatively small, when the enameled wire 2 is wound around the fourth concave portion 4312, the enameled wire 2 is easily protruded out of the lower surface of the third inserting portion 431, and when the subsequent third inserting piece 43 is bent, the enameled wire 2 is easily broken, so as to cause an open circuit, for this reason, the third inserting portion 431 may be provided with a boss extending along the lower surface thereof, and the boss may be located at the front side of the fourth concave portion 4312, at the rear side of the fourth concave portion 4312, or at the front side and the rear side of the fourth concave portion 4312.

Referring to fig. 6 to 8, the first lead 51 is fixedly connected to the second tab 42, and specifically, the first lead 51 may be directly wound or directly welded to the second bending portion 422; alternatively, as shown in fig. 6, the first hole portion 4221 is formed in the second bending portion 422, the first lead 51 passes through the first hole portion 4221, and then the first lead 51 and the first hole portion 4221 are welded and fixed together, so as to ensure the strength of the second tab 42, so that the strength of the second tab 42 after the first hole portion 4221 is formed is not poor, and the circumferential area outside the first hole portion 4221 can be increased, that is, a ring is formed outside the first hole portion 4221; alternatively, as shown in fig. 7, a first welding stage portion 4222 integrated with the second bending portion 422 is disposed at the second bending portion 422, in this case, the first welding stage portion 4222 is directly a part of the second bending portion 422, the first welding stage portion 4222 has two surfaces, the two surfaces are approximately perpendicular to each other, and at the same time, the two surfaces are approximately perpendicular to a plane where the second bending portion 422 is located, such a manner that the first lead 51 and the second tab 42 are welded and fixed; alternatively, as shown in fig. 8, the second bending section 422 is provided with a first concave portion 4223 formed by partially or circumferentially contracting along the circumferential direction thereof, and the first lead 51 is wound around the first concave portion 4223 and directly and fixedly connected with the second tab 42, or the first lead 51 is wound around the first concave portion 4223 and fixedly connected with the second tab 42 by welding.

Referring to fig. 9, 10 and 12, similarly, the second lead 52 is fixedly connected to the third tab 43, and specifically, the second lead 52 can be directly wound or directly welded to the third bent portion 432; alternatively, as shown in fig. 10, the second hole portion 4321 is formed in the third bent portion 432, the second lead 52 passes through the second hole portion 4321, and the second bent portion and the second lead 52 are welded and fixed together, so as to ensure the strength of the second tab 42, so that the strength of the second tab 42 after the second tab 42 is formed in the first hole portion 4221 is not poor, and the circumferential area outside the first hole portion 4221 can be increased, that is, a ring is formed outside the first hole portion 4221; or, as shown in fig. 9, the third bent portion 432 is disposed on the second soldering station portion 4322 integrated with the third bent portion 432, at this time, the second soldering station portion 4322 is directly a part of the third bent portion, and the second soldering station portion 4322 has two faces approximately perpendicular to each other, and at the same time, the two faces are approximately perpendicular to the plane where the third bent portion is located, such that the second lead 52 and the third tab 43 are soldered and fixed, or, as shown in fig. 12, the second soldering station portion 4322 can be formed by directly folding the end of the third tab 43, and the folding angle is approximately 90 degrees, at this time, the second lead 52 can directly abut against the second soldering station portion 4322, and then, a subsequent soldering operation is performed to solder and fix the two; the third bent section is provided with a second concave portion 4323 formed by wholly or partially shrinking along the axial direction, and the second lead 52 is wound around the second concave portion 4323 and directly fixedly connected with the third inserting piece 43, or the second lead 52 is wound around the second concave portion 4323 and fixedly connected with the third inserting piece 43 by welding.

Referring to fig. 2, two ends of the fusing device 3 are directly or indirectly fixed to the first insertion piece 41 and the second insertion piece 42, respectively, and when the fusing device reaches a certain temperature, the fusing device can disconnect the circuit of the electromagnetic coil to improve the safety performance of the electromagnetic coil, specifically, the fusing device can be a thermal fuse, wherein two ends of the fusing device 3 can be directly welded to the first insertion piece 41 and the second insertion piece 42, or indirectly welded to the first insertion piece 41 and the second insertion piece 42 by transferring a conducting wire through one end or two ends of the fusing device 3, and of course, since the fusing device 3, the transferred conducting wire, the first insertion piece 41, and the second insertion piece 42 are all conductors, the connection manner is not limited to welding, and can also be implemented by winding the fusing device 3 or the transferred conducting wire around the insertion pieces.

In order to ensure the bonding strength between the fuse device 3 and the first tab 41 and the second tab 42, a third hole 4121 may be formed in the first bending portion 412, a fourth hole 4224 may be formed in the second bending portion 422, one end of the fuse device 3 may be welded to the third hole 4121 or the third hole 4121 directly or by a transfer wire, and the other end of the fuse device 3 may be welded to the fourth hole 4224 or the fourth hole 4224 directly or by a transfer wire, but it is also possible to provide only one of the third hole 4121 and the fourth hole 4224.

Referring to fig. 4-9, before the fuse device 3 is directly or indirectly fixedly connected to the tab and the first tab 41 and the second tab 42, an encapsulating layer 6 is injected to the above-mentioned skeleton 1 assembled with the tab, the enameled wire 2 and the lead, the encapsulating layer 6 is usually made of engineering plastic, the encapsulating layer 6 is disposed such that the enameled wire 2 is not directly exposed in air, which may increase the service life of the produced tab, when the encapsulating layer 6 is injected, when the first bending portion 412 is provided with the third hole 4121 and/or when the second bending portion 422 is provided with the fourth hole 4224, the encapsulating layer 6 cannot cover the third hole 4121 and/or the fourth hole 4224, which may facilitate the subsequent welding and fixing of the fuse device 3 to the first tab 41 and the second tab 42, when the first bending portion 412 is not provided with the third hole 4121 and the second bending portion 422 is not provided with the fourth hole 4224, a part of the third tab 43 and the fourth tab needs to be exposed outside the envelope layer 6, so as to facilitate the subsequent welding and fixing of the fusing device 3 and the first tab 41 and the second tab 42.

Referring to fig. 13, since the encapsulating layer 6 is molded outside the enameled wire 2, when the electromagnetic coil works, a large amount of heat is generated, the generated heat causes the temperature of the encapsulating layer 6 to rise through heat transfer, and if the fuse device 3 is disposed inside the encapsulating layer 6, the fuse device 3 is susceptible to the influence of the encapsulating layer 6 to cause the temperature to rise, which is not beneficial to the working accuracy of the fuse device 3, and in addition, the fuse device 3 is disposed outside the encapsulating layer 6, which is very convenient for replacing the fuse device 3 when the fuse device 3 is damaged.

Referring to fig. 14, since the fuse device is disposed outside the encapsulating layer 6, the fuse device is easily damaged by external force, and in order to prevent the fuse device from being damaged, the electromagnetic coil may further include a cover 7, the cover 7 cooperates with the encapsulating layer 6 to place the fuse device in a space formed by the cover 7 and the encapsulating layer 6, specifically, the encapsulating layer 6 is provided with a groove at a position cooperating with the cover 7, and the cover 7 is provided with a protrusion corresponding to the groove, and the protrusion is clamped in the groove, so that the fuse device and the encapsulating layer can be fixedly connected.

Referring to fig. 15, a magnetic conductor 8 is further disposed outside the encapsulating layer, the magnetic conductor 8 is made of a material with magnetic conductivity, and disposed outside the encapsulating layer 6, so as to increase the magnetic conductivity of the electromagnetic coil and reduce energy consumption under the same magnetic conductivity.

It should be noted that, in this embodiment, the positions of the first inserting sheet 41, the second inserting sheet 42 and the third inserting sheet 43 are not specifically limited, and the second inserting sheet 42 may be disposed in the middle of the three inserting sheets, or may be disposed at the leftmost side or the rightmost side, without affecting the technical effects of the first inserting sheet 41, the second inserting sheet 42 and the third inserting sheet 43.

A valve device provided by the present invention has been described in detail above. The principles and embodiments of the present invention have been described herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, it is possible to make various improvements and modifications to the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. An electromagnetic coil, comprising:

a bobbin (1), said bobbin (1) comprising a winding portion (12), a first flat plate portion (11), and a second flat plate portion (13); the first flat plate part (11) is provided with a first jack (112), a second jack (113) and a third jack (114);

an enameled wire (2) wound around the winding portion (12);

a fusing device (3);

an insert sheet (4) comprising a first insert sheet (41), a second insert sheet (42) and a third insert sheet (43); the first inserting sheet (41), the second inserting sheet (42) and the third inserting sheet (43) are in a long strip shape;

a lead (5), the lead (5) comprising a first lead (51), a second lead (52);

first inserted sheet (41) is fixed in first jack (112), second inserted sheet (42) are fixed in second jack (113), third inserted sheet (43) are fixed in third jack (114), the one end of enameled wire (2) with first inserted sheet (41) welding, the other end of enameled wire (2) with third inserted sheet (43) welding, first lead wire (51) with second inserted sheet (42) fixed connection, second lead wire (52) with third inserted sheet (43) fixed connection, the both ends of fusing device (3) respectively with first inserted sheet (41), second inserted sheet (42) direct or indirect fixed connection.

2. The magnet coil as set forth in claim 1, characterized in that said first tab (41) comprises a first insertion portion (411) and a first bent portion (412) bent with respect to said first insertion portion (411), said second tab (42) comprises a second insertion portion (421) and a second bent portion (422) bent with respect to said second insertion portion (421), said third tab (43) comprises a third insertion portion (431) and a third bent portion (432) bent with respect to said third insertion portion (431).

3. The electromagnetic coil according to claim 2, wherein a flat plate portion (111) is provided on an outer peripheral surface of the first flat plate portion (11), and the first insertion hole (112), the second insertion hole (113), and the third insertion hole (114) are provided on the flat plate portion (111).

4. The electromagnetic coil according to claim 2 or 3, characterized in that the second bending part (422) is provided with a first hole part (4221), the first lead (51) is welded with the second tab (42) through the first hole part (4221), and/or the second bending part (422) is provided with a first welding table part (4222) integrated with the second bending part (422), the first lead (51) is welded with the second tab (42) through the first welding table part (4222), and/or the second bending part (422) is provided with a first concave part (4223) formed by shrinking along a radial direction thereof, the first lead (51) is wound around the first concave part (4223), and the first lead (51) is fixedly connected with the second tab (42).

5. The electromagnetic coil according to claim 2 or 3, characterized in that the third bent part (432) is provided with a second hole part (4321), the second lead wire (52) is welded with the third tab (43) through the second hole part (4321), and/or the third bent part (432) is provided with a second welding part (4322) integrated with the third bent part (432), the second lead wire (52) is welded with the third tab (43) through the second welding part (4322), and/or the third bent part (432) is provided with a second concave part (4323) formed by shrinking along the axial direction thereof, and the second lead wire (52) is wound behind the second concave part (4323), and the second lead wire (52) is fixedly connected with the third tab (43).

6. The magnet coil as claimed in claim 2 or 3, characterized in that the first bending portion (412) is provided with a third bore portion (4121) and/or the second bending portion (422) is provided with a fourth bore portion (4224), the fuse device (3) being fixed by welding to the first tab (41) via the third bore portion (4121) and the fuse device (3) being fixed by welding to the second tab (42) via the fourth bore portion (4224).

7. The electromagnetic coil according to claim 2 or 3, characterized in that the first insertion portion (411) is integrally formed with a first winding portion (4111), the first winding portion (4111) being bent upward or downward along the first insertion portion (411), and/or the third insertion portion (431) is integrally formed with a second winding portion (4311), the second winding portion (4311) being bent upward or downward along the second insertion portion (421).

8. The electromagnetic coil according to claim 2, characterized in that the first insertion portion (411) is provided with a third recess (4112) formed contracting in a radial direction thereof and/or the third insertion portion (431) is provided with a fourth recess (4312) formed contracting in a radial direction thereof.

9. The electromagnetic coil according to claim 2 or 3, characterized in that it is injection-molded with an envelope layer (6), the fusing device (3) being outside the envelope layer (6).

10. The electromagnetic coil as claimed in claim 9, characterized in that a magnetic conductor (8) is arranged outside the encapsulation layer (6).