Bobbin and transformer

Abstract

The embodiments of this application relate to bobbins and transformers. The embodiments of this application aim to solve the technical problem in related technologies, where the large volume of the bobbin is disadvantageous for miniaturizing the transformer. [Solution] The bobbin includes a cylindrical winding frame and at least one pin connection portion, the at least one pin connection portion being provided on the end face of the cylindrical winding frame, the pin connection portion being provided with a plurality of connection through holes and a first wire groove, one pin being inserted into each of the connection through holes, the first wire groove being located between two adjacent connection through holes, the first wire groove passing through the pin connection portion along the direction of the centerline of the cylindrical winding frame, and a portion of the wall of the first wire groove being located inside at least one adjacent connection through hole, thereby exposing the pin. The bobbin can shorten the distance between adjacent pins, thereby reducing the volume of the bobbin and being advantageous for miniaturizing the transformer.

Description

【Technical Field】 【0001】 The embodiments of the present application belong to the technical field of magnetic components, and particularly relate to bobbins and transformers. 【Background Art】 【0002】 With the development of electronic technology, low-power transformers are widely used in fields such as new energy vehicles. A transformer generally includes a bobbin and a coil winding wound around the bobbin. 【0003】 In related technologies, a bobbin generally includes a cylindrical winding frame and a pin connection part. The cylindrical winding frame is used to wind the coil winding. The pin connection part is connected to the edge of one end of the cylindrical winding frame, and a plurality of connection through holes are provided at intervals on the pin connection part. One pin is inserted into each of the internal of the connection through holes, and a wire passing groove is provided between two adjacent connection through holes. After the lead wire of the coil winding is drilled, it is connected to the pin in the connection through hole. 【0004】 However, the bobbin of the related technology has a large volume, which is disadvantageous for the miniaturization of the transformer. 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0005】 Thereby, the embodiments of the present application provide a bobbin and a transformer that solve the technical problem that the volume of the bobbin is large and it is disadvantageous for the miniaturization of the transformer. 【Means for Solving the Problems】 【0006】 A first embodiment of the present invention provides a bobbin comprising a cylindrical winding frame and at least one pin connector, the cylindrical winding frame being used for winding a coil, the at least one pin connector being provided on the end face of the cylindrical winding frame, the pin connector being provided with a plurality of connection through holes and at least one first wire groove, the plurality of connection through holes being spaced apart along a direction parallel to the end face of the cylindrical winding frame, and one pin being inserted into each of the connection through holes. Here, the first wire groove is located between two adjacent connection through holes, the first wire groove penetrates the pin connection portion along the direction of the centerline of the cylindrical winding frame, and a portion of the wall of the first wire groove is located inside at least one adjacent connection through hole, thereby exposing the pin. 【0007】 In the bobbin of the embodiment of the present application, the lead wires of the coil winding wound on a cylindrical reel are drilled inside a first wire groove, thereby connecting to pins inserted inside connection through holes. A portion of the wall of the first wire groove is located inside at least one adjacent connection through hole, thereby exposing the pin. This is equivalent to eliminating the portion located between the wire groove and the connection through hole in the pin connection area in related technologies, and increases the width of the first wire groove along the direction perpendicular to the centerline of the cylindrical reel. Compared to related technologies in which the wire groove and connection through hole are spaced apart, the bobbin of the embodiment of the present application can shorten the distance between adjacent pins while satisfying the requirement of the same wire groove width, thereby reducing the volume of the bobbin and being advantageous for miniaturizing the transformer. 【0008】 In some embodiments, which may include the above-described embodiment, the first wiring groove is provided on one side of at least one of the pins, and / or the first wiring groove is provided on both sides of at least one of the pins. 【0009】 In some embodiments that may include the above-described embodiment, a second wire groove is further provided in the pin connection portion, the second wire groove is located between two adjacent connection through holes where the first wire groove is not provided, and the second wire groove penetrates the pin connection portion along the direction of the centerline of the cylindrical winding frame. 【0010】 In some embodiments that may include the above-described embodiment, two lead wires of the coil winding are drilled through the first or second wire groove, and a separation section is provided inside the first or second wire groove, which separates the two lead wires. 【0011】 In some embodiments that may include the above-described examples, the first cable groove or the second cable groove includes a first sub-groove and a second sub-groove connected thereto, the first sub-groove being located between two adjacent pins, and the second sub-groove being located on the side of the first sub-groove facing the cylindrical reel. 【0012】 In some embodiments that may include the above-described examples, the separation portion includes a first separation portion and / or a second separation portion, the first separation portion being located inside the first sub-groove, and the second separation portion being located inside the second sub-groove. 【0013】 In some embodiments that may include the above-described examples, the width of the first separation portion is 0.05 mm to 3 mm in the direction of the line connecting two adjacent pins, or the height of the first separation portion is 0.05 mm to 5 mm in the direction perpendicular to the center line of the cylindrical winding frame. 【0014】 In some embodiments, including the above-described examples, the bottom of the second sub-groove is provided so as to be inclined with respect to the center line of the cylindrical winding frame in the direction from the pin connection portion to the cylindrical winding frame. 【0015】 In some embodiments, including those described above, the second separation portion is a triangular plate, one side of which is connected to the bottom of the second sub-groove. 【0016】 In some embodiments, including the above-described embodiment, the triangular plate faces away from the bottom of the second sub-groove and has a projection on the side facing the opening of the second sub-groove, and the side of the projection facing away from the triangular plate is flush with the surface of the pin connection portion. 【0017】 In some embodiments, including the above-described examples, the walls on both sides of the second sub-groove are inclined to move away from each other in the direction from the pin connection portion to the cylindrical winding frame. 【0018】 In some embodiments, including the above-described examples, one end of the pin closest to the cylindrical winding frame extends from the connecting through-hole and bends away from the cylindrical winding frame, thereby forming a first bend, which is used to connect the lead wires of the coil winding; the other end of the pin away from the cylindrical winding frame extends from the connecting through-hole and bends away from the cylindrical winding frame, thereby forming a second bend, which is used to weld to the circuit board. 【0019】 In some embodiments, including the above-described examples, a housing cavity is provided on the side of the pin connection portion opposite to the first wire groove, the housing cavity communicates with the connection through hole, and the housing cavity is used to accommodate a portion of the first bent portion of the pin. 【0020】 A second embodiment of the present invention provides a transformer comprising a core assembly, coil windings, a protective component, and one of the above-described bobbins, wherein the core assembly comprises two opposing cores, at least a portion of the cylindrical winding of the bobbin is provided inside the core assembly, the coil windings are provided on the cylindrical winding, the coil windings are electrically connected to pins of a pin connection in the bobbin, the protective component comprises a suction portion and an isolation portion, at least a portion of the suction portion is provided above the bobbin, the isolation portion is connected to the suction portion, the isolation portion encloses at least a portion of the cylindrical winding and covers at least a portion of the pin connection, and the isolation portion is used to isolate the pins of the pin connection. 【0021】 Since the transformer in the embodiment of this application includes any of the bobbins described above, it has the advantages of any of the bobbins described above, and therefore a detailed explanation is omitted here. 【0022】 In some embodiments that may include the above-described examples, the protective component further includes a connector, the connector being located inside the core assembly and situated between the suction portion and the isolation portion, with both ends of the connector connected to the suction portion and the isolation portion. 【0023】 In some embodiments, which may include the above-described examples, the connecting portion is covered by the bobbin in at least part of it. 【0024】 In some embodiments that may include the above-described embodiment, the connection portion includes two opposing first side plates, the first side plates being connected to the suction portion, and the first side plates being provided between the bobbin and the core assembly. 【0025】 In some embodiments, including the above-described examples, a through hole is provided in the first side plate, and a portion of the core assembly is drilled through the through hole. 【0026】 In some embodiments that may include the above embodiments, openings are provided on both sides of the isolation part in the direction of the center line of the coil winding, and at least a part of the pin passes below the opening. 【0027】 In some embodiments that may include the above embodiments, the isolation part includes a connection plate and two baffle plates. The connection plate is connected to the connection part, and the two baffle plates are respectively provided on both sides in the direction perpendicular to the center line of the coil winding of the connection plate. The space between the connection plate and the two baffle plates is used to partially accommodate the pin connection part. 【0028】 To more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings to be used in the description of the embodiments or the prior art are briefly introduced below. Needless to say, the drawings described below are some embodiments of the present application, and those skilled in the art can obtain other drawings from these drawings without performing inventive work. 【Brief Description of the Drawings】 【0029】 [Figure 1] It is a schematic structural diagram of the bobbin of the embodiment of the present application as viewed from a first angle. [Figure 2] It is a schematic structural diagram when a lead wire is connected to the bobbin of FIG. 1. [Figure 3] It is a schematic structural diagram of the bobbin of FIG. 1 as viewed from a second angle. [Figure 4] It is a schematic plan structural diagram of the bobbin of FIG. 3. [Figure 5] It is a schematic front structural diagram of the bobbin of FIG. 3. [Figure 6] It is a partial schematic structural diagram of the pin connection part in some possible embodiments of the embodiment of the present application. [Figure 7] It is a partial schematic structural diagram of the pin connection part in some other possible embodiments of the embodiment of the present application. [Figure 8] It is a schematic structural diagram of the bobbin in some other possible embodiments of the embodiment of the present application. [Figure 9] This is a schematic diagram of the structure of the transformer in the embodiment of the present invention. [Figure 10] Figure 9 is a schematic diagram of the exploded structure of the transformer. [Figure 11] This is a cross-sectional view of a transformer in some possible embodiments of the present invention. [Figure 12] Figure 9 is a schematic diagram of the exploded structure of the core assembly. [Figure 13] Figure 9 is a schematic diagram of the core assembly structure. [Figure 14] Figure 9 is a schematic diagram of the protective component as seen from a third angle. [Figure 15] This is a schematic diagram of the protective component viewed from a fourth angle in several possible embodiments of the present invention. [Figure 16] Figure 15 is a schematic diagram of the protective component as seen from the fifth angle. [Figure 17] Figure 9 is a schematic diagram of the bobbin structure. [Figure 18] Figure 17 is a perspective view of the bobbin. [Modes for carrying out the invention] 【0030】 As described in the background technology, related bobbins have a technical challenge in that they are large in volume. The inventor conducted research and found the following to be the cause: Related bobbins generally consist of a cylindrical winding frame and a pin connection section. The cylindrical winding frame is used to wind coil wires. The pin connection section is connected to the edge of one end of the cylindrical winding frame, and multiple connection through holes are provided in the pin connection section. The multiple connection through holes are spaced apart along a direction parallel to the end face of the cylindrical winding frame. One pin is inserted into each connection through hole, and a wire passage groove is provided between two adjacent connection through holes. After drilling the lead wires of the coil windings into the wire passage groove, they are connected to the pins. However, in related bobbins, because the wire passage groove and the two adjacent connection through holes are spaced apart, the distance between the two pins is wide, resulting in a large bobbin volume, which is disadvantageous for miniaturizing transformers. 【0031】 In related technologies, inventors have attempted to reduce the volume of the bobbin by shortening the distance between two adjacent pins, thereby meeting the demand for miniaturization of transformers. However, this is technically very difficult. Specifically, in a bobbin, the distance between two adjacent pins is the sum of the width of the wire routing groove and the width between the wall of the two connecting through-holes and the wall of the wire routing groove. Firstly, since the lead wires for the coil winding are drilled in the wire routing groove, the width of the wire routing groove cannot be reduced due to the limitations of the lead wire diameter. Secondly, the wall of the connecting through-hole needs to be in close contact with the circumferential surface of the pin so that the pin connection can enclose the pin. In other words, the width between the wall of the connecting through-hole and the wall of the wire routing groove needs to be greater than zero. This ensures that the pin and the pin connection are connected with sufficient strength, thereby preventing the pin from wobbling when the lead wires connected to the pin apply tensile force to the pin during the winding process. Therefore, miniaturizing transformers has long been a technical challenge that those skilled in the art have wanted to solve but have not been able to. 【0032】 As a result, the bobbin of the embodiment of the present application has a first wiring groove between adjacent connection through holes, and a portion of the wall of the first wiring groove is located inside at least one adjacent connection through hole, thereby exposing the pins and ensuring that the first wiring groove satisfies the width requirement, thereby reducing the distance between two adjacent pins, which is advantageous for miniaturizing the transformer. 【0033】 To further clarify the purpose, technical solutions, and advantages of the embodiments of this application, the technical solutions relating to the embodiments of this application will be described clearly and completely below, in conjunction with the drawings of the embodiments. Needless to say, the embodiments described are only some, not all, embodiments of this application. Any other embodiments that a person skilled in the art can obtain without performing any work on inventive step based on the embodiments of this application are all within the scope of protection of this application. 【0034】 Referring to Figures 1, 2, and 3, an embodiment of the present application provides a bobbin 10 including a cylindrical winding frame 110 and at least one pin connector 120, the cylindrical winding frame 110 being used for winding a coil winding 20. The at least one pin connector 120 is provided on the end face of the cylindrical winding frame 110. The pin connector 120 is provided with a plurality of connection through holes 121 and at least one first wire groove 122, the plurality of connection through holes 121 being spaced apart in a direction parallel to the end face of the cylindrical winding frame 110, for example, along the direction x shown in Figure 1, and one pin 130 is inserted into each connection through hole 121. Here, the first wiring groove 122 is located between two adjacent connection through holes 121, the first wiring groove 122 penetrates the pin connection portion 120 along the direction of the centerline of the cylindrical winding frame 110, and a portion of the wall of the first wiring groove 122 is located inside at least one adjacent connection through hole 121, thereby exposing the pin 130. 【0035】 In the bobbin 10 of the present invention, the lead wires 210 of the coil winding 20 wound on a cylindrical reel 110 are drilled inside a first wire groove 122, thereby connecting to pins 130 inserted inside connection through holes 121. A portion of the wall of the first wire groove 122 is located inside at least one adjacent connection through hole 121, thereby exposing the pins 130. This is equivalent to eliminating the portion located between the wire groove and the connection through hole in the pin connection area in related technologies, and increases the groove width of the first wire groove 122 in the direction perpendicular to the centerline of the cylindrical reel 110, for example, in direction x as shown in Figure 1. Compared to related technologies in which the wire groove and connection through hole are spaced apart, the bobbin 10 of the present invention can shorten the distance between adjacent pins while satisfying the requirement of the same wire groove width, thereby reducing the volume of the bobbin and being advantageous for miniaturizing the transformer. For example, in the related technology, the original distance between the two pins may be 1.8 mm, the width between the wall of the connecting through-hole and the wall of the wiring groove may be 2 × 0.6 mm, and the width between the wall of the connecting through-hole and the wall of the wiring groove accounts for 66% of the distance between the two pins. After removing the portion located between the wiring groove and the connecting through-hole in the pin connection, the distance between the two pins may be 0.6 mm, which is a reduction of 66%. 【0036】 Furthermore, if the distance between adjacent pins 130 is not changed, the bobbin 10 of the embodiment of the present invention can increase the width of the first wire passage groove 122, thereby increasing the space for passing the lead wires of the coil winding 20. This relaxes or eliminates the limitations on the bobbin 10 regarding the method of winding the coil winding 20, expanding the range of application of the bobbin 10 and being advantageous for general-purpose use of the bobbin 10. 【0037】 Furthermore, a portion of the wall of the first wiring groove 122 is located inside at least one adjacent connecting through hole 121, thereby exposing the pin 130. That is, even if the portion of the pin connection portion 120 located between the first wiring groove 122 and the connecting through hole 121 is removed, it is still ensured that the pin connection portion 120 and the pin 130 are connected with sufficient strength. Specifically, referring to Figure 2, firstly, a portion of area A of the pin 130 inserted inside the connecting through hole 121 is exposed by the first wiring groove 122, but the entire area is not exposed by the first wiring groove 122. The area of ​​the pin 130 inserted inside the connecting through hole 121 and not exposed by the first wiring groove 122 is still enclosed by the pin connection portion 120, thereby enabling the pin connection portion 120 and the pin 130 to be connected with sufficient strength. 【0038】 Next, the pin connector 120 is connected to the end face of the cylindrical winding frame 110, and the first wire groove 122 passes through the pin connector 120 along the centerline of the cylindrical winding frame 110, for example, in direction y as shown in Figure 2, so that the lead wires 210 of the coil winding 20 are installed, for example, along direction y, and the lead wires 210 apply torque F to the pin 130. The first hole wall 123 and the second hole wall 124 adjacent to the hole wall removed in the connection through hole 121 are the main force-bearing surfaces, and the first hole wall 123 and the second hole wall 124 apply torque G to the pin 130, and since the direction of torque G is opposite to the direction of torque F, it cancels out torque F. However, even if the other hole walls in the connection through hole 121 other than the first hole wall 123 and the second hole wall 124 are not the main force-bearing surfaces and are secondary force-bearing surfaces are removed, the pin connector 120 and the pin 130 are still connected with sufficient strength. Therefore, even if the portion of the pin connection portion 120 located between the first wire groove 122 and the connection through hole 121 is removed, the pin connection portion 120 and the pin 130 are still connected with sufficient strength. 【0039】 For example, the cylindrical winding frame 110 may have a cylindrical structure, a rectangular tube structure, or the like. A core assembly may be provided inside the cylindrical winding frame 110 to increase the strength of the transformer's magnetic field. For example, a limiting portion 111 may be provided on the end face of the cylindrical winding frame 110. The limiting portion 111 is used to restrict the coil winding 20 and prevent it from detaching from the cylindrical winding frame 110, thereby improving the reliability of the transformer. 【0040】 At least one pin connection portion 120 is provided on the end face of the cylindrical winding frame 110. The pin connection portion 120 and the cylindrical winding frame 110 may be an integral structure, thereby increasing the strength of the connection between the pin connection portion 120 and the cylindrical winding frame 110. For example, the pin connection portion 120 and the cylindrical winding frame 110 may be integrally molded by a method such as injection molding. 【0041】 For example, there may be one pin connection 120, and one pin connection 120 may be connected to either end face of the cylindrical winding frame 110. For example, referring to Figure 1, there may be two pin connection 120, and the two pin connection 120 may be provided on two opposing end faces of the cylindrical winding frame 110. For example, there may be multiple pin connection 120, and the multiple pin connection 120 may be provided on two opposing end faces of the cylindrical winding frame 110. It can be understood that the number of pin connection 120 may be specifically determined based on the number of pins 130 and lead wires 210 in the coil winding 20, and a detailed explanation of this is omitted in the embodiment of this application. 【0042】 Referring to Figures 1 to 3, the pin connection portion 120 may be provided with a plurality of connection through holes 121, which are used for inserting pins 130. The plurality of connection through holes 121 are arranged at intervals along a direction parallel to the end face of the cylindrical winding frame 110, so that the plurality of pins 130 inserted into the connection through holes 121 are arranged at intervals along a direction parallel to the end face of the cylindrical winding frame 110. 【0043】 In some possible embodiments of the present invention, the bobbin may further include connector terminals 131, as shown in Figures 17 and 18. Here, the connector terminals 131 are electrically connected to pins 130, although, exemplary, some connector terminals 131 may not be electrically connected to the corresponding pins 130. The connector terminals 131 may be electrically connected to the lead wires 210 of the coil winding 20. Pins 130 are electrically connected to the coil winding 20 by the connector terminals 131, and the connector terminals 131, as the lead-out ends of the coil winding 20, lead the lead wires 210 of the coil winding 20. In some possible embodiments of the present invention, pins 130 may also be electrically connected to a PCB, which is used to arrange other components. 【0044】 For example, the connector terminal 131 and pin 130 may be designed to be separated. If the connector terminal 131 and pin 130 are not designed to be separated, when the entire transformer is placed in a highly vibrating environment, pin 130 will vibrate in accordance with the vibration of the PCB to which it is connected, and in this case, pin 130 may transmit the vibration to the wire welding side, potentially causing a break in the wire. In the embodiment of the present invention, since the connector terminal 131 and pin 130 are designed to be separated, vibrations on pin 130 do not directly affect the connector terminal 131, thus preventing a break in the wire and ensuring high vibration resistance of the transformer. 【0045】 As shown in Figures 17 and 18, the middle portion of pin 130 may be fitted inside the pin connector 120. This means that the middle portion is hidden inside the pin connector 120, and it can be understood that this prevents the connection terminal 131 and pin 130 from influencing each other. By adopting this method, the portions of the connection terminal 131 and pin 130 located outside the pin connector 120 are separated from each other, but they are electrically connected to each other inside the pin connector 120. 【0046】 It can be understood that pin 130 may be at least one of the following: L-shaped, inverted L-shaped, or C-shaped, a separable L-shaped structure, or a gull airfoil structure. 【0047】 In some possible embodiments of the present invention, the pin connector 120 may have multiple sides, and the connector terminal 131 and pin 130 may be located on different sides of the pin connector 120, thereby more effectively ensuring that the lead wire welding point and the PCB welding point are in different regions and that the connector terminal 131 and pin 130 are separated. 【0048】 Referring to Figures 1 to 3, one end of the pin 130 closest to the cylindrical winding frame 110 extends from the connection through hole 121 and may be bent away from the cylindrical winding frame 110, thereby forming a first bent portion, which may form a connection terminal 131. In other words, the connection terminal 131 and the pin 130 may be an integrated structure. The first bent portion may be used to connect the lead wires 210 of the coil winding 20. For example, the lead wires 210 of the coil winding 20 may be fitted onto the first bent portion, thereby improving the convenience of connecting the pin 130 to the lead wires 210. The other end of the pin 130 away from the cylindrical winding frame extends from the connection through hole 121 and may be bent away from the cylindrical winding frame 110, thereby forming a second bent portion 132. The second bent portion 132 may be used for welding to a circuit board. Since the circuit board is welded to the second bent portion 132, the second bent portion 132 is subjected to stress. Because the lead wires 210 of the coil winding 20 are connected to the first bent portion, which is not directly welded to the circuit board, vibrations on the second bent portion 132 do not directly affect the first bent portion, thus preventing wire breakage and improving vibration resistance when connecting the pins 130 to the lead wires 210 of the coil winding 20. 【0049】 For example, referring to Figures 1, 2, 3, 7, and 8, a housing cavity 140 may be provided on the side of the pin connector 120 opposite to the first wire groove 122, the housing cavity 140 communicating with the connection through hole 121, and the housing cavity 140 is used to accommodate a portion of the first bent portion of the pin 130. The housing cavity 140 is in contact with a portion of the first bent portion, thereby increasing the contact area between the pin connector 120 and the pin 130, and further improving the strength of the connection between the pin connector 120 and the pin 130. 【0050】 The pin connection portion 120 may also be provided with at least one additional first wire groove 122, which is located between two adjacent connection through holes 121, and which penetrates the pin connection portion 120 along the direction of the centerline of the cylindrical winding frame 110, with a portion of the wall of the first wire groove 122 located inside at least one adjacent connection through hole 121, thereby exposing the pin 130. The lead wires 210 of the coil winding 20 are drilled inside the first wire groove 122. 【0051】 For example, a portion of the wall of the first wiring groove 122 may be located inside one adjacent connection through hole 121, that is, the portion of the pin connection portion 120 located between the wiring groove and one adjacent connection through hole is removed. For example, referring to Figures 1 to 5, a portion of the wall of the first wiring groove 122 may be located inside two adjacent connection through holes 121, that is, the portions of the pin connection portion 120 located between the wiring groove and two adjacent connection through holes are both removed, thereby further increasing the groove width of the first wiring groove 122. 【0052】 The number of first wiring grooves 122 may be one, two, or more, and in the embodiments of this application, the number of first wiring grooves 122 is not specifically limited. 【0053】 A first wiring groove 122 may be provided on one side of at least one pin 130. Exemplarily, one first wiring groove 122 may be provided on one side of one pin 130, i.e., the portion of the pin connection in the related art located between one pin and an adjacent wiring groove may be removed. Exemplarily, one first wiring groove 122 may be provided on one side of some pins 130, i.e., the portion of the pin connection in the related art located between some pins and an adjacent wiring groove may be removed. Exemplarily, one first wiring groove 122 may be provided on one side of all pins 130, i.e., the portions of the pin connection in the related art located between all pins and an adjacent wiring groove may be removed. 【0054】 In some possible embodiments of the present invention, the first wiring groove 122 may be provided on both sides of at least one pin 130. Exemplarily, the first wiring groove 122 may be provided on both sides of one pin 130, i.e., the portion of the pin connection between one pin 130 and the two adjacent wiring grooves in the related art may be removed. Exemplarily, referring to Figure 8, the first wiring groove 122 may be provided on both sides of some pins 130, i.e., the portion of the pin connection between some pins 130 and the two adjacent wiring grooves in the related art may be removed. Exemplarily, referring to Figure 6, the first wiring groove 122 may be provided on both sides of all pins 130, i.e., the portion of the pin connection between all pins 130 and the two adjacent wiring grooves in the related art may be removed. 【0055】 Referring to Figures 1 to 5, a second wiring groove 127 may be provided in the pin connection portion 120, the second wiring groove 127 being located between two adjacent connection through holes 121 where the first wiring groove 122 is not provided, and the second wiring groove 127 passing through the pin connection portion 120 along the direction of the centerline of the cylindrical winding frame 110, for example, direction y shown in Figure 1. 【0056】 Referring to Figures 1, 2, 4, 5, 6, 7, and 8, the two lead wires 210 of the coil winding 20 may be drilled in the first wire groove 122 or the second wire groove 127. A separation section 150 is provided inside the first wire groove 122 or the second wire groove 127, and the separation section 150 separates the two lead wires 210, thereby preventing the two lead wires 210 from coming into contact and causing a short circuit, thereby improving the reliability of the transformer. For example, referring to Figures 1 to 6, the separation section 150 may be provided inside the first wire groove 122. Referring to Figure 7, the separation section 150 may be provided inside the second wire groove 127. Referring to Figure 8, the separation section 150 may be provided inside both the first wire groove 122 and the second wire groove 127. 【0057】 Referring to Figures 1, 2, 4, 6, 7, and 8, the first wiring groove 122 or the second wiring groove 127 may include a connected first sub-groove 125 and a second sub-groove 126, the first sub-groove 125 being located between two adjacent pins 130. The second sub-groove 126 is located on the side of the first sub-groove 125 facing the cylindrical reel 110. The lead wires 210 of the coil winding 20 are drilled through the second sub-groove 126 and then the first sub-groove 125 before being connected to the pins 130. 【0058】 The separation section 150 may include a first separation section 151 and / or a second separation section 152, the first separation section 151 may be located inside the first sub-groove 125, and the second separation section 152 may be located inside the second sub-groove 126. For example, referring to Figures 1 to 7, the separation section 150 may include a first separation section 151, the first separation section 151 may be located inside the first sub-groove 125. The lead wires 210 located inside the first sub-groove 125 can be separated by the first separation section 151, thereby preventing the lead wires 210 from contacting each other and causing a short circuit. 【0059】 For example, referring to Figure 4, the width of the first separation section 151 may be 0.05 mm or more and 3 mm or less in the direction of the line connecting the two adjacent pins 130 to the first separation section 151, for example, in direction x as shown in Figure 4. For example, the width of the first separation section 151 may be 0.05 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, or 3 mm. The first separation section 151 within this width range can separate the lead wires 210 with a sufficiently small width, avoiding an excessive increase in the distance between the two pins 130, thereby ensuring a small volume for the bobbin 10 and further ensuring miniaturization of the transformer. 【0060】 Referring to Figure 5, the height of the first separation section 151 in a direction perpendicular to the centerline of the cylindrical reel 110, for example, in direction z shown in Figure 5, may be 0.05 mm or more and 5 mm or less. For example, the height of the first separation section 151 may be 0.05 mm, 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm. The first separation section 151 within this height range can separate the lead wires 210 at a sufficiently small height, avoiding an excessive increase in the distance between the two pins 130, thereby ensuring a small volume for the bobbin 10 and further ensuring miniaturization of the transformer. 【0061】 For illustrative purposes, referring to Figure 8, the separation section 150 may further include a second separation section 152, which may be located inside a second sub-groove 126. The second sub-groove 126 is located on the side of the first sub-groove 125 facing the cylindrical reel 110, in other words, the second sub-groove 126 is not located between the two pins 130. By placing the second separation section 152 inside the second sub-groove 126, the lead wires 210 can be separated, and the distance between the two pins 130 can be avoided, thereby avoiding an increase in the volume of the bobbin 10, which is advantageous for miniaturizing the transformer. 【0062】 Referring to Figures 1, 2, 4, 5, 7, and 8, the bottom of the second sub-groove 126 is positioned to slope toward the center line of the cylindrical winding frame 110 in the direction from the pin connection portion 120 to the cylindrical winding frame 110, for example, in direction y shown in Figure 1. By installing it in this way, the lead wire 210 can extend gently from the coil winding 20 into the first sub-groove 125, improving the convenience of installing the lead wire 210. 【0063】 For example, referring to Figure 8, the second separation section 152 located inside the second sub-groove 126 may be a triangular plate, with one side of the triangular plate connected to the bottom of the second sub-groove 126. The triangular plate may be housed inside the second sub-groove 126, and since the triangular plate has a sufficiently large area and does not extend out of the second sub-groove 126, it adequately ensures the function of separating the lead wires 210 of the second separation section 152 without increasing the volume of the bobbin 10, which is advantageous for the reliability and miniaturization of the transformer. 【0064】 For example, the triangular plate faces away from the bottom of the second sub-groove 126, and a projection 153 is provided on the side facing the opening of the second sub-groove 126, with the side of the projection 153 facing away from the triangular plate being flush with the surface of the pin connection portion 120. By installing it in this way, the area of ​​the second separation portion 152 is further increased, and as a result the second separation portion 152 does not extend out of the second sub-groove 126, which is even more advantageous for the reliability and miniaturization of the transformer. 【0065】 Referring to Figure 8, the walls on both sides of the second sub-groove 126 are inclined away from each other in the direction from the pin connection portion 120 to the cylindrical winding frame 110, and in direction y shown in Figure 8. This increases the internal space of the second sub-groove 126, thereby increasing the space for the lead wire 210, while ensuring that the distance between the two pins 130 is not increased. 【0066】 Embodiments of the present application also provide a transformer. Referring to Figures 9 and 10, the transformer includes a core assembly 30, a coil winding 20, a protective component 40, and one of the bobbins 10 described above. The core assembly 30 includes two opposing cores. At least a portion of the cylindrical winding frame 110 of the bobbin 10 is provided inside the core assembly 30. The coil winding 20 is provided on the cylindrical winding frame 110, and the coil winding 20 is electrically connected to pins 130 of a pin connection portion 120 in the bobbin 10. For example, the coil winding 20 has lead wires 210, which are electrically connected to pins 130. The protective component 40 includes a suction portion 410 and an isolation portion 420, the suction portion 410 of which at least a portion is provided above the bobbin 10. The isolation section 420 is connected to the suction section 410, and the isolation section 420 encloses at least a portion of the cylindrical reel 110 and covers at least a portion of the pin connection section 120, and the isolation section 420 is used to isolate the pins 130 of the pin connection section 120. 【0067】 In the embodiment of the present invention, the transformer has a bobbin 10 and part of the protective component 40 located inside the core assembly 30. The bobbin 10 is used to wind the coil winding 20 and supports the coil winding 20. By providing at least a portion of the suction portion 410 of the protective component 40 above the bobbin 10, the suction portion 410 protects the upper part of the bobbin 10 and may also be used for suction by other suction devices to complete processes such as lifting and displacement. By electrically connecting the pin 130 to the coil winding 20, current output is realized. By providing at least a portion of the pin connection portion 120 inside the isolation portion 420 of the protective component 40, the isolation portion 420 is used to isolate the pin connection portion 120. The isolation portion 420 serves as an isolation region between the core and the pin connection portion 120, meeting the spatial distance and voltage withstand requirements between the pin connection portion 120 and the core assembly 30 within the minimum size range, and has the advantage of high voltage withstand requirements and large spatial distance. 【0068】 In one embodiment, as shown in Figures 9 and 10, the upper end face of the core assembly 30 along its height direction is a flush structure. In related art, the suction component is generally a single cover plate, which is generally fixed to the core assembly 30 by a locking structure. Specifically, a locking block is provided on the cover plate, and a notch is provided on the upper surface of the core assembly 30 corresponding to the locking block, and the locking block is locked into the notch to form a locking structure. Because the coil winding 20 is enclosed in the core all around, the notch can only be placed in the area with the least electrical influence, which is not only difficult to process, but also causes stress concentration problems in the core assembly 30, reduces the strength of the structure, and increases the risk of cracking. In this embodiment, the upper end face of the core assembly 30 along its height direction is a flush structure, that is, no notch is provided on the upper end face of the core assembly 30 along its height direction, so stress concentration is avoided and the reliability of the core assembly 30 is improved. 【0069】 As shown in Figures 9 and 10, the suction portion 410 provided in the embodiment of the present invention is connected to the isolation portion 420 by the connecting portion 430, thereby achieving fixation to the suction portion 410 and ensuring the effect of fixing the core assembly 30 to the suction portion 410. It can be understood that the suction portion 410 is fitted inside the core assembly 30, ensuring that the suction portion 410 does not fall out. Furthermore, since there is no need to lock the suction portion 410 to the core assembly 30, there is no need to install a notch in the core assembly 30, which reduces the difficulty of processing and lowers manufacturing costs. 【0070】 Specifically, as shown in Figures 11, 12, and 13, in the embodiment of the present invention, the core assembly 30 has an E-shaped structure. Each core includes a body 320 and a center column 310, the body 320 having an approximate U-shaped structure, so that when two opposing cores are combined, an approximate rectangular parallelepiped structure is formed, the center column 310 is provided inside the body 320, and the center columns 310 of the two cores are provided facing each other. Because the size of the center column 310 is smaller than the size of the body 320, a storage cavity 330 is formed between the body 320 and the center column 310, and the storage cavity 330 is used to house at least a part of the bobbin 10 and a part of the protective component 40. The two cores, which are provided opposite each other in the direction of the center line of the cylindrical reel 110, are each drilled inside the cylindrical reel 110 of the bobbin 10. Here, the suction portion 410 can be provided at least partially on the upper part of the housing cavity 330, which corresponds to the suction portion 410 being fitted at least partially inside the core assembly 30, ensuring the effect of fixing the core assembly 30 to the suction portion 410. Of course, depending on the actual needs, the core assembly 30 may be an I-shaped structure or any other core structure, and the present invention is not limited thereto. It can be understood that the structure of the protective component 40 may be modified to suit the structure of the core assembly 30. 【0071】 It can be understood that the upper surface of the suction portion 410 may be flush with the upper end surface of the core assembly 30, or it may protrude from the upper end surface of the core assembly 30. In this embodiment of the present application, the relative position between the upper surface of the suction portion 410 and the upper end surface of the core assembly 30 is not limited and may be adjusted based on actual production needs, as long as it enables adsorption of other adsorption devices to the suction portion 410, it falls within the scope of protection of this embodiment of the present application. 【0072】 In some possible embodiments of the present invention, as shown in Figure 15, the protective component 40 may further include a connector 430, the connector 430 located inside the core assembly 30 and situated between the suction portion 410 and the isolation portion 420, with both ends of the connector 430 connected to the suction portion 410 and the isolation portion 420. 【0073】 The connection part 430 is positioned between the suction part 410 and the isolation part 420, so that the connection part 430 connects the suction part 410 and the isolation part 420, thereby connecting the suction part 410, the connection part 430 and the isolation part 420 to form an integrated structure. 【0074】 Related technologies demonstrate that when the wires of a coil winding are located on the outside and close to the core, any damage or deterioration of the wires over time can easily lead to a voltage withstand failure. However, in the embodiment of this invention, the connection portion 430 can enclose the entire outside of the coil winding 20, and as a protective area for the coil winding 20, the connection portion 430 prevents damage to the coil winding 20 when assembling the core assembly 30. Furthermore, since the connection portion 430 covers the outside of the coil winding 20, the adhesive used to bond the protective component 40 to the core assembly 30 is prevented from adhering to the coil winding 20, thus providing further protection for the coil winding 20. 【0075】 In some possible embodiments of the present invention, as shown in Figure 14, the connection portion 430 includes two opposing first side plates 431, the first side plates 431 connected to the suction portion 410, and the first side plates 431 are provided between the bobbin 10 and the core assembly 30. 【0076】 The first side plate 431 is positioned vertically to the isolation section 420, with its bottom connected to the isolation section 420 and its upper part connected to the suction section 410, thereby providing good support to the suction section 410. By positioning the first side plate 431 between the bobbin 10 and the core assembly 30, the first side plate 431 acts as an isolation between the coil winding 20 and the core assembly 30, thereby ensuring to some extent the spatial distance and voltage withstand requirements of the coil winding 20. 【0077】 In some possible embodiments of the present invention, a through hole 432 may be provided in the first side plate 431, and a portion of the core assembly 30 is drilled through the through hole 432. By providing a through hole 432 in the first side plate 431, the through hole 432 provides clearance for the core assembly 30, so that the center column 310 of the core assembly 30 can pass through the through hole 432 and enter the interior of the bobbin 10, thereby enabling electromagnetic induction between the coil winding 20 and the core assembly 30. 【0078】 In some possible embodiments of the present invention, as shown in Figure 15, the connection portion 430 further includes two opposing second side plates 433, the second side plates 433 being connected to the suction portion 410 and provided between the two first side plates 431, and the second side plates 433 being provided between the coil winding 20 and the core assembly 30. 【0079】 If the connecting portion 430 has only two opposing first side plates 431, the two first side plates 431 form a structure having two open ends, and the connecting portion 430 further includes two opposing second side surfaces, and the second side plate 433 is connected to the suction portion 410 and provided between the two first side plates 431, so that the second side surfaces serve to connect the suction portion 410 and the isolation portion 420, in which case the four sides of the suction portion 410 are supported by the two first side plates 431 and the two second side surfaces, further guaranteeing the support effect on the suction portion 410. Furthermore, the two second sides correspond to sealing the two open ends of the opening structure 421 at both ends, thereby enabling the connection part 430 to completely enclose and isolate the outside of the coil winding 20, preventing any partial exposure of the coil winding 20 and further guaranteeing the clearance distance and voltage withstand requirements of the coil winding 20. Thus, the connection part 430 has the advantage of having high voltage withstand requirements and a large clearance distance. 【0080】 In some possible embodiments of the present invention, the suction portion 410, the isolation portion 420, and the connecting portion 430 may be integrally molded structures. 【0081】 Compared to a segmented structure, by providing the suction section 410, isolation section 420, and connection section 430 as a single molded structure, the number of assembly steps for the parts is reduced, resulting in lower manufacturing costs. Furthermore, the suction section 410, isolation section 420, and connection section 430 form a relatively sealed structure, so even if an abnormality occurs, the voltage withstand and clearance requirements can still be met, preventing safety problems due to failure and resulting in high reliability. 【0082】 In some possible embodiments of the present invention, the protective component 40 is made of an insulating material, which can be understood to ensure an insulating and isolating effect on the coil winding 20 and the pin 130. 【0083】 In some possible embodiments of the present invention, as shown in Figures 14 and 15, openings 421 are provided on both sides of the isolation portion 420 in the axial direction of the coil winding 20, and at least a portion of the pin 130 passes below the openings 421. 【0084】 By providing openings 421 on both sides of the isolation section 420, the openings 421 provide clearance space for the pins 130, allowing at least some of the pins 130 to extend from the openings 421 below the isolation section 420 and pass to the outside, thereby connecting the pins 130 to other electrical components. 【0085】 In some possible embodiments of the present invention, the isolation section 420 includes a connecting plate 422 and two baffle plates 423, the connecting plate 422 being connected to the connection section 430. The two baffle plates 423 are provided on both sides of the connecting plate 422 along the radial direction of the coil winding 20, and the space between the connecting plate 422 and the two baffle plates 423 is used to partially house the pin connection section 120. 【0086】 By positioning the connection plate 422 of the isolation section 420 to connect to the connection section 430, the connection plate 422 plays the role of connecting to the connection section 430. By providing two baffle plates 423 on both sides of the connection plate 422 along the radial direction of the coil winding 20, the connection plate 422 and the two baffle plates 423 form a U-shaped structure, creating a storage space between the connection plate 422 and the two baffle plates 423. This storage space is used to partially house the pins 130, and the connection plate 422 and the two baffle plates 423 work together to provide partial isolation from the pins 130, thereby satisfying the spatial distance and voltage withstand requirements for the pins 130. In addition, the baffle plates 423 also act as support legs for the entire transformer, ensuring the support effect on the transformer. Furthermore, the lead-out ends of the coil winding 20 are connected to the pins 130, that is, the pins 130 are provided at both ends along the axial direction of the coil winding 20. By providing the two baffle plates 423 on both sides of the connecting plate 422 along the radial direction of the coil winding 20, the baffle plates 423 provide clearance for the connecting harness between the pins 130 and the coil winding 20. 【0087】 In some possible embodiments of the present invention, as shown in Figures 14 and 15, isolation grooves 424 are provided on the surface of the protective component 40, specifically, isolation grooves 424 are provided on the connecting plate 422. 【0088】 Here, creepage distance is the shortest path between two conductive components or between a conductive component and the device protection interface, measured along the insulating surface. Providing isolation grooves 424 on the surface of the protection component 40 is equivalent to increasing the creepage distance, further ensuring the insulation effect. 【0089】 The cross-section of the isolation groove 424 may be rectangular, triangular, or arc-shaped, and in this embodiment, the shape of the cross-section of the isolation groove 424 is not limited. It can be understood that any shape that can achieve the effect of increasing the creepage distance falls within the scope of protection of this embodiment. 【0090】 The connecting plate 422 is provided with two isolation grooves 424, each located on either side of the connecting portion 430, ensuring a symmetrical and balanced effect, as well as ensuring the isolation of the pin 130 and the coil winding 20. In this embodiment, it can be understood that the number of isolation grooves 424 is not limited and may be adjusted based on actual production needs. 【0091】 In some possible embodiments of the present invention, as shown in Figures 14 and 15, a first marker portion 425 is provided on one side of the protective component 40 in the radial direction of the coil winding 20. Specifically, the first marker portion 425 is provided on one of the baffle plates 423, and the first marker portion 425 serves as a marker. 【0092】 Since the entire protective component 40 has a symmetrical structure with respect to the coil winding 20, if no markings are provided on the protective component 40, it is not possible to distinguish between the two sides of the protective component 40 along the radial direction of the coil winding 20, making it difficult to determine whether it is the left or right side of the protective component 40. By providing a first marking portion 425 on the side of the protective component 40 along the radial direction of the coil winding 20, one side of the protective component 40 can be identified using the first marking portion 425, allowing for quick distinction between the left and right sides of the protective component 40, providing great convenience for installation and subsequent maintenance. 【0093】 In some possible embodiments of the present invention, a second marking portion 412 is provided on the upper surface of the suction portion 410, as shown in Figures 14 and 15. 【0094】 Since the entire protective component 40 has a symmetrical structure with respect to the coil winding 20, if no markings are provided on the protective component 40, it is impossible to distinguish between the two sides of the protective component 40, making it difficult to specifically determine which side is which. By providing a second marking section 412 on the upper surface of the suction section 410, the second marking section 412 serves as a marking, and by using the second marking section 412 to identify one side of the protective component 40, it is possible to quickly and specifically determine which side is which, avoiding situations where one side is confused and providing great convenience for installation and subsequent maintenance. In addition, since the suction section 410 is located at the very top of the entire transformer, providing the second marking section 412 on the upper part of the suction section 410 makes it easy to observe the second marking section 412. 【0095】 The second marking portion 412 may be provided on the side of the suction portion 410 that is perpendicular to the center line of the coil winding 20, or on the side of the suction portion 410 that is in the direction of the center line of the coil winding 20, or it can be understood that the second marking portion 412 may be provided on the corner of the suction portion 410. In this embodiment, the specific position of the second marking portion 412 on the suction portion 410 is not limited, and the axial or radial direction of the coil winding 20 may be marked according to the actual production. 【0096】 The first marking section 425 and the second marking section 412 may be provided independently of each other and may not interfere with each other. The first marking section 425 and the second marking section 412 may also be used in combination. For example, one marking section may be used to mark the side of the coil winding 20 along the axial direction, and the other may be used to mark the side of the coil winding 20 along the radial direction. 【0097】 The first marking section 425 and the second marking section 412 may also be called a foolproof design and may be manufactured using a mold for producing the protective component 40, and it is understood that this avoids the occurrence of printing omissions or reverse printing of the PIN marking points. 【0098】 In some possible embodiments of the present invention, as shown in Figures 16 and 17, the bobbin 10 includes a cylindrical winding frame 110, the coil winding 20 is wound on the cylindrical winding frame 110, and the core assembly 30 is partially drilled into the cylindrical winding frame 110. 【0099】 By winding the coil winding 20 onto a cylindrical winding frame 110, the cylindrical winding frame 110 provides a place to wind the coil winding 20. Through holes are provided within the cylindrical winding frame 110 along the direction of its centerline, so that the two center columns 310 facing the core in the core assembly 30 can each pass through the through holes, enabling electromagnetic induction between the core and the coil winding 20. 【0100】 Here, on the sides of the cylindrical winding frame 110 and the protective component 40 that are close to each other, a positioning projection 411 is provided on one side and a positioning groove 112 is provided on the other side, and the positioning projection 411 is at least partially provided in the positioning groove 112. 【0101】 If the protective component 40 is directly covered on the outside of the bobbin 10, it is difficult to guarantee the relative position between the protective component 40 and the bobbin 10. On the sides of the cylindrical winding frame 110 and the protective component 40 that are close to each other, a positioning projection 411 is provided on one side and a positioning groove 112 is provided on the other side, and by providing the positioning projection 411 at least partially in the positioning groove 112, the positioning projection 411 and the positioning groove 112 engage with each other, thereby achieving the positioning of the cylindrical winding frame 110 and the protective component 40, thereby guaranteeing the accuracy of the relative position between the protective component 40 and the bobbin 10, and preventing large misalignments between the protective component 40 and the bobbin 10. 【0102】 In some possible embodiments of the present invention, as shown in Figure 17, the bobbin 10 further includes a pin connector 120, the number of pin connectors 120 may be two, and a cylindrical reel 110 is located between the two pin connectors 120 and connected to the cylindrical reel 110. A pin 130 is inserted into the connecting through hole 121 of the pin connector 120. Here, an isolation portion 420 is provided on the outside of the pin connector 120. 【0103】 By connecting the cylindrical reel 110 and the pin 130 to the pin connection part 120, the pin connection part 120 serves to support the cylindrical reel 110 and the pin 130, and also provides a place to attach the pin 130, thereby ensuring the support effect on the cylindrical reel 110 and the pin 130. By providing the isolation part 420 to cover the outside of the pin connection part 120, the portion of the pin 130 located inside the pin connection part 120 can be isolated and protected. 【0104】 Notably, the pin connection portion 120 may be made of an insulating material. The pin 130 is generally made of a metal material, for example, phosphor bronze with a smooth and flat surface, or a nickel-plated surface with a matte tin plating. 【0105】 In some possible embodiments of the present invention, the coil winding 20 may include a plurality of coils, which are wound around a core assembly 30. 【0106】 The transformer provided by this embodiment is primarily used to drive devices such as control ICs or electronic control units, and is widely used in many systems, including on-board chargers (OBCs), battery management systems (BMSs), power control units (PCUs), electrical control units (ECUs), and DC-DC converters. 【0107】 The transformer provided by this embodiment is applicable to the manufacturing process of various low-power transformers used in new energy vehicles. In terms of electrical characteristics, very high voltage withstand capability and clearance are required, while in terms of mechanical characteristics, very high vibration resistance is required. The transformer provided by this embodiment is a structural platform for a low-power transformer manufacturing process with high voltage withstand capability and clearance, high vibration resistance, high reliability, and fully automated operation. This platform can be expanded into a product series that meets the requirements of various automotive low-power transformer manufacturing processes. 【0108】 Finally, it should be stated that the above embodiments merely illustrate the technical solutions of the present application and do not limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand the following: The technical solutions described in the above embodiments may still be modified, or some or all of their technical features may be replaced with equivalent ones, and even if such modifications or replacements are made, the essence of the technical solutions in question will not deviate from the scope of the technical solutions related to the embodiments of the present application. [Explanation of symbols] 【0109】 10 bobbins 110 Cylindrical winding frame 111 Restriction section 112 Positioning groove 120-pin connector 121 Connection through hole 122 First cable groove 123 1st hole wall 124 2nd hole wall 125 First sub-groove 126 Second sub-groove 127 Second cable groove 130 pins 131 Connection terminals 132 2nd bending section 140 capacity cavity 150 Separation section 151 1st separation section 152 2nd separation section 153 Protrusion 20 Coil windings 210 Lead wires 30 Core Assembly 310 Center Column 320 main unit 330 Storage Cavity 40 protective parts 410 Suction part 411 Positioning protrusion 412 Second sign section 420 Isolation Department 421 Aperture 422 Connection Plate 423 Baffle Plate 424 Isolation groove 425 1st sign section 430 Connection part 431 1st side plate 432 Through hole 433 2nd side plate

Claims

[Claim 1] A cylindrical winding frame used for winding coil wires, The cylindrical winding frame includes at least one pin connection portion provided on the end face of the winding frame, The pin connection portion is provided with a plurality of connection through holes and at least one first wire groove, the plurality of connection through holes are arranged at intervals along a direction parallel to the end face of the cylindrical winding frame, and one pin is inserted into each of the connection through holes. The first wire passage groove is located between two adjacent connection through holes, the first wire passage groove penetrates the pin connection portion along the direction of the centerline of the cylindrical winding frame, and a portion of the wall of the first wire passage groove is located inside at least one adjacent connection through hole, thereby exposing the pin. A bobbin characterized by the following features. [Claim 2] The first wire passage groove is provided on one side of at least one of the pins. and / or, the first wire groove is provided on both sides of at least one of the pins, The bobbin according to feature 1. [Claim 3] A second wire passage groove is further provided in the pin connection portion, the second wire passage groove is located between two adjacent connection through holes where the first wire passage groove is not provided, and the second wire passage groove penetrates the pin connection portion along the direction of the centerline of the cylindrical winding frame. The bobbin according to claim 1 or 2. [Claim 4] Two lead wires of the coil winding are drilled into the first or second wire groove, A separation section is provided inside the first wire groove or the second wire groove, and the separation section separates the two lead wires. The bobbin according to feature 3. [Claim 5] The first cable groove or the second cable groove includes a first sub-groove and a second sub-groove that are connected, wherein the first sub-groove is located between two adjacent pins, and the second sub-groove is located on the side of the first sub-groove facing the cylindrical winding frame. The bobbin according to feature 4. [Claim 6] The separation portion includes a first separation portion and / or a second separation portion, wherein the first separation portion is located inside the first sub-groove, and the second separation portion is located inside the second sub-groove. The bobbin according to feature 5. [Claim 7] In the direction of the line connecting the two adjacent pins in the first separation portion, the width of the first separation portion is 0.05 mm or more and 3 mm or less. Alternatively, the height of the first separation portion is 0.05 mm or more and 5 mm or less in a direction perpendicular to the center line of the cylindrical winding frame. The bobbin according to feature 6. [Claim 8] The bottom of the second sub-groove is provided such that it is inclined toward the center line of the cylindrical winding frame in the direction from the pin connection portion toward the cylindrical winding frame. The bobbin according to feature 6. [Claim 9] The second separation portion is a triangular plate, and one side of the triangular plate is connected to the bottom of the second sub-groove. The bobbin according to feature 8. [Claim 10] The triangular plate has a projection on the side facing away from the bottom of the second sub-groove and towards the opening of the second sub-groove, and the side of the projection facing away from the triangular plate is flush with the surface of the pin connection portion. The bobbin according to feature 9. [Claim 11] In the direction from the pin connection portion toward the cylindrical winding frame, the walls on both sides of the second sub-groove are provided in an inclined direction away from each other. The bobbin according to feature 6. [Claim 12] One end of the pin closest to the cylindrical winding frame extends from the connecting through hole and bends away from the cylindrical winding frame, thereby forming a first bent portion, which is used to connect the lead wires of the coil winding. One end of the pin that is separated from the cylindrical winding frame extends from the connecting through hole and bends away from the cylindrical winding frame, thereby forming a second bent portion, which is used for welding to the circuit board. The bobbin according to claim 1 or 2. [Claim 13] A housing cavity is provided on the side of the pin connection portion opposite to the first wire groove, the housing cavity communicates with the connection through hole, and the housing cavity is used to accommodate a portion of the first bent portion of the pin. The bobbin according to feature 12. [Claim 14] The invention comprises a core assembly, coil windings, protective components, and the bobbin described in claim 1 or 2. The core assembly includes two opposing cores, and at least a portion of the cylindrical winding frame of the bobbin is provided inside the core assembly. The coil winding is provided on the cylindrical winding frame, and the coil winding is electrically connected to the pins of the pin connection portion in the bobbin. The protective component includes a suction portion and an isolation portion, wherein at least a portion of the suction portion is provided above the bobbin, the isolation portion is connected to the suction portion, the isolation portion encloses at least a portion of the cylindrical winding frame and covers at least a portion of the pin connection portion, and the isolation portion is used to isolate the pin of the pin connection portion. A transformer characterized by the following features. [Claim 15] The protective component further includes a connecting portion, the connecting portion is provided inside the core assembly, the connecting portion is located between the suction portion and the isolation portion, and both ends of the connecting portion are connected to the suction portion and the isolation portion. The transformer according to feature 14. [Claim 16] The aforementioned connecting portion is covered by the bobbin, at least a portion of it. The transformer according to feature 15. [Claim 17] The connecting portion includes two opposing first side plates, the first side plates are connected to the suction portion, and the first side plates are provided between the bobbin and the core assembly. The transformer according to feature 16. [Claim 18] A through hole is provided in the first side plate, and a portion of the core assembly is drilled into the through hole. The transformer according to feature 17. [Claim 19] Openings are provided on both sides of the isolation portion in the direction of the center line of the coil winding, and at least a portion of the pin passes below the opening. The transformer according to feature 14. [Claim 20] The isolation section includes a connecting plate and two baffle plates, and the connecting plate is connected to the connection section. The two baffle plates are provided on both sides of the connecting plate in a direction perpendicular to the center line of the coil winding, and the space between the connecting plate and the two baffle plates is used to partially house the pin connection portion. The transformer according to feature 15.

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