Framework and transformer

Abstract

The utility model relates to a framework and a transformer, and aims to improve the creepage distance between a primary stage and a secondary stage of the transformer and the safety of the transformer. The framework comprises a framework body, a through hole extending in the first direction is formed in the framework body in a penetrating mode, the framework body comprises a winding reel and a base which are sequentially arranged in the first direction, the base comprises terminal blocks which are distributed in the second direction at intervals, the terminal blocks extend in the direction away from the winding reel, and the terminal blocks extend in the direction away from the winding reel. The height of the terminal block is greater than or equal to 11mm; and the pins are arranged at the ends, deviating from the winding reel, of the terminal blocks, in the second direction, the distance between the pins arranged on the two terminal blocks is larger than or equal to 8.8 mm, and the second direction intersects with the first direction.

Description

Technical Field

[0001] This application relates to the field of transformer technology, and more particularly to a frame and transformer. Background Art

[0002] In switching power supplies, flyback topology transformers have a relatively high effective voltage (300V–400V). To improve safety, the creepage distance between the primary and secondary windings must be between 6.0mm and 8.0mm. Common methods to increase the creepage distance in transformer manufacturing include adding retaining tape or using triple-insulated wire to wind the transformer. However, these methods reduce the width of the winding slots, affecting the winding process in the transformer. Utility Model Content

[0003] This application provides a frame and a transformer to improve the creepage distance between the primary and secondary windings of the transformer and the safety of the transformer.

[0004] To achieve the above objectives, according to a first aspect of this application, an embodiment of this application provides a skeleton, comprising:

[0005] The skeleton body has a through hole extending in a first direction. The skeleton body includes a winding drum and a base arranged sequentially in the first direction. The base includes terminal blocks spaced apart in a second direction. The terminal blocks extend away from the winding drum and the height of the terminal blocks is greater than or equal to 11 mm.

[0006] The pins are disposed on one end of the terminal block away from the winding drum. In the second direction, the distance between the pins disposed on the two terminal blocks is greater than or equal to 8.8 mm. The second direction intersects the first direction.

[0007] In one embodiment, the base further includes a first baffle, one end of the winding drum is fixedly connected to the first baffle and the winding drum is located on one side of the first baffle; the terminal block is fixedly disposed on the first baffle and extends in a direction away from the winding drum, the terminal block and the winding drum are offset, and the terminal block and the first baffle define a first limiting groove.

[0008] In one embodiment, the frame further includes a second baffle, and the other end of the winding cylinder is fixedly connected to the second baffle and located on one side of the second baffle; the first baffle and the second baffle protrude from the outer surface of the winding cylinder in the radial direction, and the first baffle, the second baffle and the winding cylinder define a winding groove.

[0009] In one embodiment, the second baffle has a second limiting groove formed by an inwardly recessed surface on the side of the second baffle away from the winding drum, and the second limiting groove corresponds to the first limiting groove.

[0010] In one embodiment, the length of the skeleton body is 12.1mm to 12.5mm, the width is 12.2mm to 12.6mm, and the height is 21.1mm to 21.7mm; and / or,

[0011] The through hole is a rectangular hole with a width of 2.9mm to 3.1mm, a length of 6.2mm to 6.4mm, and a depth of 8.7mm to 9.1mm; and / or,

[0012] The terminal block has a thickness of 2.5mm to 2.7mm and a width of 12.2mm to 12.6mm; and / or,

[0013] The pin is a metal needle with a diameter of 0.5mm to 0.7mm; and / or,

[0014] The thickness of the first baffle is 0.5mm to 1.5mm; and / or,

[0015] The width of the first limiting groove is 6mm to 8mm; and / or,

[0016] The width of the winding groove is 6mm to 8mm; and / or,

[0017] The thickness of the second baffle is 0.7mm to 1.7mm; and / or,

[0018] The width of the second limiting groove is 6mm to 8mm.

[0019] In one embodiment, at least one lead groove is recessed on the side surface of the terminal block opposite to the first limiting groove, and the lead groove penetrates the terminal block along the first direction; along the second direction, the lead groove is offset from the pin.

[0020] In one embodiment, a support boss is provided on the end face of the terminal block opposite to the winding cylinder, and the support boss is spaced apart from the pin.

[0021] In one embodiment, the height of the supporting boss is 1.6mm to 2.0mm; and / or,

[0022] The minimum distance between the support boss and the pin is 0.49mm to 0.63mm; and / or,

[0023] The pin protrudes from the support boss by a length of 2.7mm to 3.5mm.

[0024] In one embodiment, a plurality of pins are provided on a single terminal block, and the distance between two adjacent pins is 2mm to 3mm; and / or,

[0025] A portion of the pin is embedded in the terminal block, and the remaining portion extends out of the terminal block; the total length of the pin is 7mm to 10mm, of which the length of the portion embedded in the terminal block is 3.5mm to 5.5mm.

[0026] According to a second aspect of this application, embodiments of this application also provide a transformer, including a magnetic core, a winding, and the aforementioned frame. The magnetic core includes a winding post that extends into the winding drum. The winding is wound around the outside of the winding drum and includes a winding wire, the end of which is wound around a pin.

[0027] The beneficial effects of the embodiments of this application are as follows:

[0028] In the embodiments of this application, the frame increases the height of the terminal block and lengthens the distance between the pins on different terminal blocks, so that the height of the terminal block is greater than or equal to 11mm and the distance between the pins on different terminal blocks is greater than or equal to 8.8mm. When this frame is applied to a transformer, even without adhesive backing on the bottom of the magnetic core, the creepage distance between the primary and secondary windings can be greater than or equal to 8.0mm, thereby improving the safety of the transformer. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0031] Figure 1 This is a schematic diagram of the three-dimensional structure of the skeleton provided in the embodiments of this application. Figure 1 ;

[0032] Figure 2 This is a schematic diagram of the three-dimensional structure of the skeleton provided in the embodiments of this application. Figure 2 ;

[0033] Figure 3 This is a schematic diagram of the three-dimensional structure of the skeleton provided in the embodiments of this application. Figure 3 ;

[0034] Figure 4This is a schematic diagram of the front view structure of the skeleton provided in an embodiment of this application;

[0035] Figure 5 yes Figure 4 Sectional view along the middle AA direction;

[0036] Figure 6 This is a bottom view of the skeleton provided in the embodiment of this application;

[0037] Figure 7 This is a side view of the skeleton provided in an embodiment of this application;

[0038] Figure 8 This is a cross-sectional structural diagram of the transformer provided in the embodiment of this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 10. Skeleton;

[0041] 1. Skeleton body; 101. Through hole;

[0042] 11. Winding spool; 111. Winding groove;

[0043] 12. Base; 120. First limiting groove; 121. Terminal block; 1211. Lead wire groove; 122. First baffle; 123. Support boss;

[0044] 13. Second baffle; 130. Second limiting groove;

[0045] 2. Pins;

[0046] 100. Transformer; 20. Magnetic core; 201. Winding post; 30. Winding. DETAILED DESCRIPTION

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0048] To facilitate understanding of the present application, the spline curves and arrows used in the reference numerals in the accompanying drawings are explained below: spline curves without arrows indicate solid parts, that is, parts with solid structures; spline curves with arrows indicate virtual parts, that is, parts without solid structures.

[0049] Firstly, please refer to Figures 1 to 8This application provides a frame 10, which is used in a transformer 100 to support the magnetic core 20 and winding 30 in the transformer 100.

[0050] Specifically, the frame 10 includes a frame body 1 and pins 2. The frame body 1 is used to fix the magnetic core 20 and the winding 30. The pins 2, also called pins, are used for winding the ends of the wire and connecting them to the circuit board, thereby realizing the electrical connection between the winding 30 and the circuit board. The frame body 1 is a non-magnetic and non-conductive insulating part, such as a plastic part; the pins 2 are conductive parts, such as metal parts. A through hole 101 is provided through the frame body 1, and the through hole 101 extends along a first direction (i.e., the first direction is the axial direction of the through hole 101). The through hole 101 is used for the insertion of the winding post 201 in the magnetic core 20. The shape of the through hole 101 can be circular, square, or racetrack-shaped, and is not limited here. Optionally, the shape of the through hole 101 is set to adapt to the outer contour of the winding post 201 inserted therein, so that the through hole 101 can limit the winding post 201.

[0051] The frame body 1 includes a winding drum 11 and a base 12, which are arranged sequentially along a first direction. That is, the base 12 is located at one end of the winding drum 11, and a through hole 101 passes through the winding drum 11 and the base 12. The shape of the winding drum 11 can be square, circular, or racetrack-shaped, and is not limited here. As an example, the winding drum 11 and the base 12 are integrally formed.

[0052] The base 12 includes a pair of terminal blocks 121, i.e., two terminal blocks 121, which are spaced apart along a second direction. Here, the second direction is the direction in which the two terminal blocks 121 are arranged sequentially, and it intersects with the first direction. Optionally, the second direction is perpendicular to the first direction. The terminal blocks 121 are located at one end of the winding drum 11 and extend away from the winding drum 11. For ease of distinction, one of the terminal blocks 121 can be referred to as the first terminal block 121a, and the other terminal block 121 as the second terminal block 121b, with the first terminal block 121a and the second terminal block 121b spaced apart. Typically, one of the first terminal block 121a and the second terminal block 121b is the primary terminal block, and the other is the secondary terminal block.

[0053] Pin 2 is disposed on terminal block 121, specifically on the end of terminal block 121 opposite to the winding spool 11. The number of pins 2 disposed on a single terminal block 121 can be one or more. It can be understood that if there are two terminal blocks 121, then the total number of pins 2 in the skeleton 10 is at least two. As an example, each terminal block 121 has multiple pins 2 disposed at intervals, with the number of pins 2 on each terminal block 121 being equal and their positions corresponding. For ease of distinction, the pin 2 disposed on the first terminal block 121a is called the first pin 2a, and the pin 2 disposed on the second terminal block 121b is called the second pin 2b. Typically, the pin disposed on the primary terminal block is called the primary pin, and the pin disposed on the secondary terminal block is called the secondary pin. The primary pin is used for winding the end of the primary winding, and the secondary pin is used for winding the end of the secondary winding. It can be understood that one of the first pin 2a and the second pin 2b is the primary pin, and the other is the secondary pin.

[0054] In addition, the height H1 of the terminal block 121 is ≥11mm; in the second direction, the distance D1 between the pins 2 disposed on the two terminal blocks 121 is ≥8.8mm.

[0055] For example, see Figures 4 to 6 The first terminal block 121a and the second terminal block 121b extend along a first direction, specifically in a direction away from the winding drum 11. The first terminal block 121a and the second terminal block 121b are parallel and face to face. Thus, the first direction is specifically the z-axis direction and the second direction is the y-axis direction.

[0056] Here, the height H1 of terminal block 121 refers to the length of terminal block 121 extending in the first direction (e.g., the z-axis direction). The distance D1 is the length from the center line of the first pin 2a to the center line of the second pin 2b in the second direction (e.g., the y-axis direction).

[0057] The skeleton 10 provided in this application increases the height of the terminal block 121 and lengthens the distance between the pins 2 on different terminal blocks 121, so that the height of the terminal block 121 is greater than or equal to 11mm and the distance between the pins 2 on different terminal blocks 121 is greater than or equal to 8.8mm. When the skeleton 10 is applied to the transformer 100, even without adhesive backing on the bottom of the magnetic core 20, the creepage distance between the primary and secondary windings can be greater than or equal to 8.0mm, thereby improving the safety of the transformer 100.

[0058] In some implementations, please refer to Figure 6 and Figure 7The length L0 of the skeleton body 1 is 12.1mm to 12.5mm, the width W0 is 12.2mm to 12.6mm, and the height H0 is 21.1mm to 21.7mm. The height H0 of the skeleton body 1 refers to its dimension in the first direction, the length L0 refers to its dimension in the second direction, and the width W0 refers to its dimension in the third direction. Here, the third direction refers to the direction perpendicular to the first and second directions. For example, the first direction is the z-axis, the second direction is the y-axis, and the third direction is the x-axis. For example, the length L0 is 12.1mm, 12.2mm, 12.3mm, 12.4mm or 12.5mm; the width W0 is 12.2mm, 12.3mm, 12.4mm, 12.5mm or 12.6mm; and the height H0 is 21.1mm, 21.2mm, 21.3mm, 21.4mm, 21.5mm, 21.6mm or 21.7mm.

[0059] In some implementations, please refer to Figure 6 and Figure 7 The through hole 101 is a rectangular hole with a width W2 of 2.9mm to 3.1mm and a length L2 of 6.2mm to 6.4mm. The width W2 of the through hole 101 refers to its dimension in a third direction, and the length L2 refers to its dimension in a second direction. For example, the width W2 can be 2.9mm, 2.95mm, 3.0mm, 3.05mm, or 3.1mm; and the length L2 can be 6.2mm, 6.25mm, 6.3mm, 6.35mm, or 6.4mm.

[0060] In some embodiments, the depth of the through hole 101 is 8.7 mm to 9.1 mm. The depth of the through hole 101 refers to the dimension of the through hole 101 in a first direction. As examples, the depth of the through hole 101 is 8.7 mm, 8.8 mm, 8.9 mm, 9.0 mm, or 9.1 mm.

[0061] In some embodiments, the wall thickness of the winding bobbin 11 is 0.4 mm to 0.8 mm. Within this range, the winding bobbin 11 can have better strength. As an example, the wall thickness of the winding bobbin 11 is 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, or 0.8 mm.

[0062] In some implementations, please refer to Figure 6 and Figure 7The thickness T1 of the terminal block 121 is 2.5mm to 2.7mm, and the width W3 is 12.2mm to 12.6mm. The thickness T1 of the terminal block 121 refers to its dimension in the second direction, and the width W3 refers to its dimension in the third direction. Within these ranges, the terminal block 121 can have good mechanical strength, reducing the risk of breakage. For example, the thickness T1 can be 2.5mm, 2.55mm, 2.6mm, 2.65mm, or 2.7mm; and the width W3 can be 12.2mm, 12.3mm, 12.4mm, 12.5mm, or 12.6mm. Optionally, the width W3 of the terminal block 121 is equal to the width W0 of the frame body 1.

[0063] In some implementations, please refer to Figure 6 Pin 2 is a metal pin with a diameter R of 0.5mm to 0.7mm. For example, the diameter R is 0.5mm, 0.55mm, 0.6mm, 0.65mm or 0.7mm.

[0064] In some implementations, please refer to Figure 7 The number of pins 2 provided on a single terminal block 121 is multiple, and the distance D2 between two adjacent pins 2 is 2mm to 3mm. As an example, D2 is 2mm, 2.2mm, 2.5mm, 2.8mm or 3mm.

[0065] In some implementations, please refer to Figure 6 Pin 2 is disposed on terminal block 121, specifically a portion of pin 2 is embedded within terminal block 121 (as shown by the dotted line in the figure), with the remaining portion extending outside terminal block 121. As an example, the total length L1 of pin 2 is 7mm to 10mm, of which the length L5 of the portion embedded within terminal block 121 is 3.5mm to 5.5mm. As an example, length L1 is 7mm, 7.5mm, 8.0mm, 8.5mm, 9.0mm, 9.5mm, or 10.0mm; length L5 is 3.5mm, 4.0mm, 4.5mm, 5.0mm, or 5.5mm.

[0066] In some implementations, please refer to Figures 1 to 7The base 12 also includes a first baffle 122. One end of the winding drum 11 is fixedly connected to the first baffle 122, and the winding drum 11 is located on one side of the first baffle 122. One end of the terminal block 121 is also fixedly connected to the first baffle 122, and the terminal block 121 extends in a direction away from the winding drum 11. That is, both the terminal block 121 and the winding drum 11 are connected to the first baffle 122, but their extending directions are opposite. Furthermore, the terminal block 121 and the winding drum 11 are offset. Specifically, the winding drum 11 is located near the center of the first baffle 122, and the terminal block 121 is located at the edge of the first baffle 122. Thus, a first limiting groove 120 is formed on the base 12. Specifically, the terminal blocks 121 on both sides and the first baffle 122 define the first limiting groove 120. The first limiting groove 120 is used to accommodate part of the magnetic core 20 and limit the magnetic core 20 when the frame 10 and the magnetic core 20 are assembled. As an example, the magnetic core 20 includes a winding post 201, a cover plate, and a common post. The winding post 201 and the common post are located on the same side of the cover plate. When the frame 10 is applied to the transformer 100, the winding post 201 extends into the through hole 101, the cover plate is accommodated in the first limiting groove 120, the common post is located outside the frame 10, but the winding 30 is located between the common post and the winding post 201.

[0067] In some implementations, please refer to Figure 6 The thickness T2 of the first baffle 122 is 0.5mm to 1.5mm. The thickness T2 of the first baffle 122 refers to its dimension in the first direction. Within this thickness range, the first baffle 122 can have good mechanical strength, reducing the risk of fracture of the frame body 1. For example, the thickness T2 is 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, or 1.5mm.

[0068] In some implementations, please refer to Figure 7 The distance between the two spaced-apart terminal blocks 121 is equal to the width W4 of the first limiting groove 120, which is slightly larger than the length L2 of the through hole 101. Here, the width W4 of the first limiting groove 120 refers to its dimension in the second direction. Specifically, the width W4 of the first limiting groove 120 is 6mm to 8mm. For example, the width W4 can be 6mm, 6.5mm, 7mm, 7.5mm, or 8mm.

[0069] In some implementations, please refer to Figures 1 to 7The frame 10 also includes a second baffle 13. The other end of the winding drum 11 is fixedly connected to the second baffle 13, and the winding drum 11 is located on one side of the second baffle 13. It can be understood that if one end of the winding drum 11 is connected to the first baffle 122 and the other end is connected to the second baffle 13, then the winding drum 11 is located between the first baffle 122 and the second baffle 13. The first baffle 122 and the second baffle 13 protrude from the outer surface of the winding drum 11 in the radial direction; that is, in the radial direction of the winding drum 11, the dimensions of both the first baffle 122 and the second baffle 13 are larger than the dimensions of the winding drum 11. In the radial direction of the winding drum 11, the dimensions of the first baffle 122 and the second baffle 13 may be equal or unequal. In this way, the first baffle 122, the second baffle 13 and the winding drum 11 can define the winding groove 111, which is used to accommodate the winding 30 when the frame 10 is applied to the transformer 100. That is, in the transformer 100, the winding 30 is sleeved outside the winding drum and accommodated in the winding groove 111.

[0070] In some implementations, please refer to Figure 6 The distance between the first baffle 122 and the second baffle 13 is equal to the width W1 of the winding groove 111, where the width W1 of the winding groove 111 refers to the dimension of the winding groove 111 in the first direction. Specifically, the width W1 of the winding groove 111 is 6mm to 8mm. As an example, the width W1 is 6mm, 6.5mm, 7mm, 7.5mm, or 8mm.

[0071] In some implementations, please refer to Figure 6 The thickness T3 of the second baffle 13 is 0.7mm to 1.7mm. The thickness T3 of the second baffle 13 refers to its dimension in the first direction. Within this thickness range, the second baffle 13 can possess good mechanical strength, reducing the risk of fracture of the frame body 1. For example, the thickness T3 can be 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, or 1.7mm.

[0072] In some implementations, please refer to Figures 1 to 7The second baffle 13 is provided with a second limiting groove 130. Specifically, the surface of the second baffle 13 facing away from the winding bobbin 11 is recessed inward to form the second limiting groove 130. The second limiting groove 130 corresponds to the first limiting groove 120, so that the extension direction of the second limiting groove 130 is consistent with the extension direction of the first limiting groove 120, and the position of the second limiting groove 130 is aligned with the position of the first limiting groove 120. Similar to the function of the first limiting groove 120, the second limiting groove 130 is also used to accommodate the cover plate of the magnetic core 20 and limit the magnetic core 20 during the assembly of the frame 10 and the magnetic core 20. As an example, the transformer 100 includes two magnetic cores 20, which are respectively assembled onto the frame body 1 from both ends facing each other. The winding post 201 of one magnetic core 20 is inserted into the through hole 101 and the cover plate is inserted into the first limiting groove 120. The winding post 201 of the other magnetic core 20 is inserted into the through hole 101 and the cover plate is inserted into the second limiting groove 130. The winding posts 201 of the two magnetic cores 20 are connected end to end, and the common post of the two magnetic cores 20 is also connected end to end, thereby forming a closed magnetic circuit.

[0073] In some embodiments, the width of the second limiting groove 130 is 6mm to 8mm, and the width of the second limiting groove 130 also refers to the dimension of the second limiting groove 130 in the second direction. As an example, the width of the second limiting groove 130 is 6mm, 6.5mm, 7mm, 7.5mm, or 8mm. Optionally, the width of the second limiting groove 130 is equal to the width W4 of the first limiting groove 120.

[0074] In some implementations, please refer to Figures 1 to 7 The terminal block 121 is also provided with a lead wire groove 1211. Specifically, the side surface of the terminal block 121 facing away from the first limiting groove 120 (also called the outer surface) is recessed into the terminal block 121 to form the lead wire groove 1211, and the lead wire groove 1211 extends through the terminal block 121 along the first direction (i.e., the axial direction of the through hole 101), so that the lead wire groove 1211 can connect the two ends of the terminal block 121. In this way, when the frame 10 is applied in the transformer 100, the winding 30 is sleeved on the winding bobbin 11 and located at one end of the terminal block 121, while the pin 2 is usually located at the other end of the terminal block 121. By providing the lead wire groove 1211, the end of the winding on the winding 30 can extend from one end of the terminal block 121 to the other end of the terminal block 121 through the lead wire groove 1211 and be wound around the pin 2. A part of the end of the winding can be accommodated in the lead wire groove 1211, and the lead wire groove 1211 can guide and protect the end of the winding. The number of lead slots 1211 provided on a single terminal block 121 can be one or more.

[0075] In some implementations, please refer to Figure 3 and Figure 7Along the second direction, the lead groove 1211 is misaligned with the pin 2, which can reduce the risk of local cracking of the terminal block 121.

[0076] In some implementations, please refer to Figure 3 and Figure 7 The terminal block 121 is also provided with a support boss 123. Specifically, the support boss 123 is a protrusion on the end face of the terminal block 121 opposite to the winding spool 11. The support boss 123 is used to abut against the circuit board when the pin 2 is connected to the circuit board. In addition, the support boss 123 is spaced apart from the pin 2. The advantage of this arrangement is that it is convenient to wrap the end of the winding wire around the pin 2. The number of support bosses 123 provided on a single terminal block 121 can be one or more.

[0077] In some implementations, please refer to Figure 6 The height H2 of the supporting boss 123 is 1.6mm to 2.0mm, and the height H2 of the supporting boss 123 is the dimension of the supporting boss 123 in the first direction. Within this range, it can be ensured that the end of the winding can be effectively wound on the pin 2. As an example, the height H2 is 1.6mm, 1.7mm, 1.8mm, 1.9mm or 2.0mm.

[0078] In some implementations, please refer to Figure 7 The support boss 123 is spaced apart from the pin 2, and the minimum distance D3 between the support boss 123 and the pin 2 is 0.49mm to 0.63mm. As an example, D3 is 0.49mm, 0.51mm, 0.53mm, 0.55mm, 0.57mm, 0.59mm, 0.61mm or 0.63mm.

[0079] In some implementations, please refer to Figure 6 The length H3 of pin 2 protruding from the support boss 123 is 2.7mm to 3.5mm. As an example, the length H3 is 2.7mm, 2.8mm, 2.9mm, 3.0mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm or 3.5mm.

[0080] Secondly, please see Figure 8 This application also provides a transformer 100, which includes a magnetic core 20, a winding 30, and the aforementioned frame 10. Specifically, the magnetic core 20 includes a winding post 201 that extends into a winding drum 11, and the winding 30 is wound around the outside of the winding drum 11. The winding 30 includes a winding wire, the end of which is wound around a pin 2.

[0081] The transformer 100 provided in this application embodiment has a creepage distance of 8.0 mm from the secondary solder joint to the magnetic core when the effective voltage exceeds 400V.

[0082] In some implementations, transformer 100 is a flyback topology transformer.

[0083] In some embodiments, the winding 30 includes a primary winding and a secondary winding, wherein the primary winding includes primary windings and the secondary winding includes secondary windings. Both the primary winding and the secondary winding are mounted on the winding spool 11.

[0084] In some embodiments, the transformer 100 also includes a circuit board, with pins 2 inserted into the circuit board to achieve electrical connection with the circuit board.

[0085] The following explanation is based on specific implementation details:

[0086] Example 1

[0087] A frame is provided, the height of the terminal block is 11mm, the distance between the pins on the two terminal blocks is 8.8mm, the width of the first limiting groove and the second limiting groove are equal, both 7.1mm; the width of the winding groove is 7.5mm; the thickness of the first baffle is 0.8mm; the thickness of the second baffle is 1.1mm; the length of the frame body is 12.4mm, the width is 12.3mm, and the height is 21.4mm; the through hole is a rectangular hole with a depth of 8.9mm, a width of 6.3mm, and a length of 3mm; the wall thickness of the winding tube is 0.6mm; the diameter of the pin is 0.6mm; the length of the pin is 8.5mm, of which the pin extends 4.5mm beyond the terminal block; the thickness of the terminal block is 2.6mm, and the length is 12.4mm; the height of the supporting boss is 1.8mm; the minimum distance between the supporting boss and the pin is 0.63mm; and the length of the pin protruding from the supporting boss is 2.6mm. The frame is assembled with the EE13 type magnetic core and windings to obtain a transformer.

[0088] Tests on the transformer revealed the following: the electrical clearance between the primary and secondary windings was 9.6 mm, significantly exceeding the safety requirement of 4.5 mm; the electrical clearance between the core and secondary windings was 8.7 mm, significantly exceeding the safety requirement of 4.5 mm; the creepage distance between the primary and secondary windings was 9.6 mm, significantly exceeding the safety requirement of 8.0 mm; and the creepage distance between the core and secondary windings was 8.7 mm, significantly exceeding the safety requirement of 8.0 mm.

[0089] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0090] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0091] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0092] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A skeleton, characterized in that, include: The skeleton body has a through hole extending in a first direction. The skeleton body includes a winding drum and a base arranged sequentially in the first direction. The base includes terminal blocks spaced apart in a second direction. The terminal blocks extend away from the winding drum and the height of the terminal blocks is greater than or equal to 11 mm. The pins are disposed on one end of the terminal block away from the winding drum. In the second direction, the distance between the pins disposed on the two terminal blocks is greater than or equal to 8.8 mm. The second direction intersects the first direction.

2. The skeleton according to claim 1, characterized in that, The base also includes a first baffle, one end of the winding drum is fixedly connected to the first baffle and the winding drum is located on one side of the first baffle; the terminal block is fixedly disposed on the first baffle and extends in a direction away from the winding drum, the terminal block and the winding drum are offset, and the terminal block and the first baffle define a first limiting groove.

3. The skeleton according to claim 2, characterized in that, The frame further includes a second baffle, and the other end of the winding cylinder is fixedly connected to the second baffle and located on one side of the second baffle; the first baffle and the second baffle protrude from the outer surface of the winding cylinder in the radial direction, and the first baffle, the second baffle and the winding cylinder define a winding groove.

4. The skeleton according to claim 3, characterized in that, The second baffle has a second limiting groove formed by an inward recess on the side surface away from the winding drum, and the second limiting groove corresponds to the first limiting groove.

5. The skeleton according to claim 4, characterized in that, The length of the skeleton body is 12.1mm to 12.5mm, the width is 12.2mm to 12.6mm, and the height is 21.1mm to 21.7mm; and / or, The through hole is a rectangular hole with a width of 2.9mm to 3.1mm, a length of 6.2mm to 6.4mm, and a depth of 8.7mm to 9.1mm; and / or, The terminal block has a thickness of 2.5mm to 2.7mm and a width of 12.2mm to 12.6mm; and / or, The pin is a metal needle with a diameter of 0.5mm to 0.7mm; and / or, The thickness of the first baffle is 0.5mm to 1.5mm; and / or, The width of the first limiting groove is 6mm to 8mm; and / or, The width of the winding groove is 6mm to 8mm; and / or, The thickness of the second baffle is 0.7mm to 1.7mm; and / or, The width of the second limiting groove is 6mm to 8mm.

6. The skeleton according to claim 2, characterized in that, At least one lead groove is recessed on the side of the terminal block opposite to the first limiting groove. The lead groove passes through the terminal block along the first direction. Along the second direction, the lead groove is offset from the pin.

7. The skeleton according to claim 2, characterized in that, A support boss is provided on the end face of the terminal block opposite to the winding drum, and the support boss is spaced apart from the pin.

8. The skeleton according to claim 7, characterized in that, The height of the supporting boss is 1.6mm to 2.0mm; and / or, The minimum distance between the support boss and the pin is 0.49mm to 0.63mm; and / or, The pin protrudes from the support boss by a length of 2.7mm to 3.5mm.

9. The skeleton according to claim 8, characterized in that, A plurality of pins are provided on a single terminal block, and the distance between two adjacent pins is 2mm to 3mm; and / or, A portion of the pin is embedded in the terminal block, and the remaining portion extends out of the terminal block; the total length of the pin is 7mm to 10mm, of which the length of the portion embedded in the terminal block is 3.5mm to 5.5mm.

10. A transformer, characterized in that, The device includes a magnetic core, a winding, and a frame according to any one of claims 1 to 9, wherein the magnetic core includes a winding post extending into the winding drum, the winding is wound around the outside of the winding drum, the winding includes a winding wire, the end of which is wound around a pin.

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