Transformer and power supply having the same

Abstract

The present invention discloses a transformer and a power supply having the same. The transformer includes a winding and a transformer skeleton. The transformer skeleton includes a winding column and a first side plate. The winding is wound around the winding column. The first side plate is provided at one axial end of the winding column. First wire grooves and second wire grooves are formed at the edges of the first side plate. At least one first wire inlet end and at least one first wire outlet end of the primary side winding pass through the corresponding first wire grooves and are connected to the corresponding pins. The second wire inlet end and the second wire outlet end of the secondary side winding pass through the corresponding second wire grooves and are connected to the corresponding pins. On the cross-section of the winding column, the projection of the contact part between the edge of the first wire groove adjacent to the winding column and the corresponding primary side winding is located inside the projection of the cross-section center line of a layer of sub-secondary coils adjacent to the central axis of the winding column. According to the transformer of the present invention, the processing technology is simple, the yield is relatively high, and it is convenient to realize the fully automated production mode of the transformer.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular, to a transformer and a power supply having the same. Background Art

[0002] A transformer is the most important component of a high-frequency switching power supply, and a transformer bobbin is the main structural component of the transformer, which can provide a winding space for the windings in the transformer.

[0003] The transformer bobbin does not completely avoid safety regulations problems in its structural design. Physical isolation is carried out during the later winding process of the transformer to increase the safety distance and meet the requirements of dielectric strength. After the winding of the transformer is completed, a contact cross phenomenon is likely to occur between the primary winding and the secondary winding, resulting in a low yield rate of the transformer, low production efficiency and high cost of the transformer.

[0004] In the related art, in order to make the transformer meet the requirements of dielectric strength, acetate cloth is used as a barrier tape, and barrier glue is provided on both sides of the wire groove close to the transformer bobbin to increase the safety distance. In order to avoid the contact cross phenomenon, a Teflon sleeve or a reverse-folded tape is sleeved at the cross-contact position between the primary winding and the secondary winding to achieve isolation. However, the implementation of these physical isolation methods requires a lot of manpower and material resources, resulting in high costs. There are great safety hazards during the processing, such as the deviation of the tape that plays an isolation and insulation role and the improper pasting, which causes the transformer not to meet the requirements of safety regulations standards, with a low yield rate. Moreover, the above process can only be in a semi-automatic production mode, resulting in low production efficiency and long production cycle. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides a transformer, the processing technology of which is simple. On the premise of ensuring the isolation effect between the primary winding and the secondary winding, the yield rate of the transformer is effectively improved, and at the same time, it is convenient to realize the fully automatic production mode of the transformer.

[0006] A transformer according to an embodiment of the first aspect of the present invention includes: a winding, the winding includes a primary winding and a secondary winding wound successively from inside to outside, the secondary winding includes a secondary coil, and the secondary coil includes at least one layer of sub-secondary coils; a transformer bobbin, the transformer bobbin includes a winding post and a first side plate, the winding is wound on the winding post, the first side plate is provided at an axial end of the winding post, a plurality of pins are provided on the first side plate, a wire groove penetrating through the first side plate along the axial direction of the winding post is formed at the edge of the first side plate, the wire groove includes a first wire groove and a second wire groove, the primary winding has a plurality of winding ends, at least one winding end of the primary winding passes through the corresponding first wire groove and is connected to the corresponding pin, and the winding end of the secondary winding passes through the corresponding second wire groove and is connected to the corresponding pin. In the cross-section of the winding post, the projection of the contact part between the edge of the first wire groove adjacent to the axial end of the winding post and the corresponding primary winding is located inside the projection of the cross-section center line of one layer of the sub-secondary coils adjacent to the central axis of the winding post.

[0007] In the transformer according to the embodiment of the present invention, by setting the projection of the contact part Q in the cross-section of the winding post inside the projection of the reference part O in the cross-section of the winding post, a certain spacing distance is provided between the wire routing of the primary winding in the first wire groove and the secondary winding, realizing the isolation between the primary winding and the secondary winding, avoiding the contact crossing of the primary winding and the secondary winding and not meeting the safety regulations requirements, effectively improving the yield rate of the transformer. At the same time, there is no need to sleeved a Teflon tube or stick a folded tape at the cross-contact position of the primary winding and the secondary winding to achieve isolation, simplifying the processing technology of the transformer, avoiding excessive investment of manpower and material resources, and because there is no need to set Teflon tubes or stick folded tapes, etc., it is convenient to realize the fully automated production mode of the transformer to improve the production efficiency of the transformer and reduce the production cycle. Among them, the contact part Q is the contact part between the edge of the first wire groove adjacent to the axial end of the winding post and the corresponding primary winding, and the reference part O is the cross-section center line of the layer of sub-secondary coils adjacent to the central axis of the winding post.

[0008] According to some embodiments of the present invention, the cross-section of the winding post has a first direction and a second direction perpendicular to each other, the first wire groove is recessed along the first direction, and in the second direction, the edge of the first wire groove through which the winding end of the primary winding passes and adjacent to the axial end of the winding post is located between the two ends of the cross-section center line of the sub-secondary coils.

[0009] According to some embodiments of the present invention, the first wire groove through which the winding end of the primary winding passes is recessed along the first direction until it is lower than the position where the innermost layer of the sub-secondary coils is located.

[0010] According to some embodiments of the present invention, the winding column includes: a winding column body, on which the primary side winding is wound; at least one baffle, which is arranged at an end of the winding column body, the baffle surrounds the winding column body and is arranged in sequence with the primary side winding along the axial direction of the winding column. In the cross-section of the winding column, the projection of the outer edge of the baffle is located outside the projection of the outer contour of the primary side winding, or is aligned with the projection of the outer contour of the primary side winding.

[0011] According to some embodiments of the present invention, there is one baffle, which is located at an axial end of the winding column body adjacent to the first side plate. A plurality of wire grooves penetrating the baffle along the axial direction of the winding column are formed at the edge of the baffle, and the plurality of wire grooves are correspondingly communicated with the plurality of first wire grooves; alternatively, the baffle is located at the other axial end of the winding column body away from the first side plate, and a plurality of wire grooves penetrating the baffle along the axial direction of the winding column are formed at the edge of the baffle.

[0012] According to some embodiments of the present invention, there are two baffles, which are a first baffle and a second baffle respectively. The first baffle is located at an axial end of the winding column body adjacent to the first side plate, and the second baffle is located at the other axial end of the winding column body away from the first side plate. The primary side winding is located between the first baffle and the second baffle. A plurality of wire grooves penetrating the baffle along the axial direction of the winding column are formed at the edge of the baffle. The wire grooves include a plurality of first wire grooves and a plurality of second wire grooves. The first wire grooves are formed on the first baffle, and the plurality of first wire grooves are correspondingly communicated with the plurality of first wire grooves, and the second wire grooves are formed on the second baffle.

[0013] According to some embodiments of the present invention, in the axial direction of the winding column, the thickness of the baffle is a, and a satisfies: 0.2 mm ≤ a ≤ 3 mm. In the radial direction of the winding column, the width of the baffle is b, and b satisfies: 0.2 mm ≤ b ≤ 5 mm.

[0014] According to some embodiments of the present invention, the depth of the wire groove is c, and c satisfies: c ≥ b.

[0015] According to some embodiments of the present invention, the winding column body is a hollow structure, and the wall thickness of the winding column body is t, and t satisfies: t ≥ 0.4 mm.

[0016] According to some embodiments of the present invention, an insulating member is arranged between the primary side winding and the secondary side winding, and the insulating member wraps the primary side winding and the baffle.

[0017] According to some embodiments of the present invention, in the axial direction of the winding column, the length of the winding column is l1 and the length of the insulating member is l2, and the following is satisfied between l1 and l2: 0.5 mm ≤ l2 - l1 ≤ 2 mm.

[0018] According to some embodiments of the present invention, the baffle includes a body portion and an extension portion. The body portion is disposed around the winding column body, and the extension portion is provided at the outer edge of the body portion and protrudes radially from the outer edge of the body portion along the winding column.

[0019] According to some embodiments of the present invention, a wire routing groove is provided on the baffle, and the wire routing groove is provided on the extension portion or penetrates the extension portion.

[0020] According to some embodiments of the present invention, a second side plate is provided at the other axial end of the winding column. At least one wire hanging portion is provided on the second side plate, and at least one wire hanging groove is formed on the wire hanging portion. One winding end of the primary side winding is wound in the wire hanging groove.

[0021] According to some embodiments of the present invention, the distance between the wire hanging portion and the end of the second side plate adjacent to the center of the winding column is x, and the following is satisfied for x: 0.2 mm ≤ x ≤ 0.8 mm.

[0022] According to some embodiments of the present invention, the primary side winding includes a primary coil, a feedback coil, and a shielding coil. The primary coil, the feedback coil, and the shielding coil all have winding ends. The winding ends of the primary coil and the feedback coil are connected to the corresponding pins. One winding end of the shielding coil is connected to the corresponding pin, and the other winding end of the shielding coil is wound on the wire hanging portion.

[0023] According to some embodiments of the present invention, one side of the wire passing groove away from the central axis of the winding column is open to form an opening, and the width of the opening gradually decreases in the direction towards the center of the wire passing groove.

[0024] According to some embodiments of the present invention, the wall surface of the wire passing groove includes a first wall surface. The first wall surface is one of the two opposite side wall surfaces of the wire passing groove adjacent to the corresponding pin. The first wall surface of at least one wire passing groove extends obliquely in the axial direction of the winding column towards the direction close to the corresponding pin.

[0025] The power supply according to the second aspect embodiment of the present invention includes a transformer according to the first aspect embodiment of the present invention above.

[0026] The power supply according to the embodiment of the present invention simplifies the processing technology of the power supply, improves the processing efficiency of the power supply, facilitates the realization of the automated production mode of the power supply, and effectively improves the yield rate of the power supply by adopting the above-mentioned transformer.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0029] Figure 1 is a partial structural schematic diagram of a transformer according to an embodiment of the present invention;

[0030] Figure 2 is Figure 1 an enlarged view of part A in

[0031] Figure 3 is Figure 1 an assembly structural schematic diagram of the transformer skeleton and the primary side winding shown in , in which an insulating member is shown in the figure;

[0032] Figure 4 is Figure 3 an assembly structural schematic diagram of the transformer skeleton and the primary side winding shown in , in which the insulating member is not shown in the figure;

[0033] Figure 5 is Figure 1 a structural schematic diagram of the transformer skeleton shown in ;

[0034] Figure 6 is Figure 5 an enlarged view of part B in ;

[0035] Figure 7 is Figure 3 a sectional view of the transformer skeleton shown in ;

[0036] Figure 8 is Figure 7 an assembly structural schematic diagram of the transformer skeleton and the winding shown in , in which the winding is indicated by a dotted line in the figure;

[0037] Figure 9 is a structural schematic diagram of a transformer skeleton according to another embodiment of the present invention;

[0038] Figure 10 is Figure 9 a sectional view of the transformer skeleton shown in ;

[0039] Figure 11Schematic diagram of a partial structure of a transformer according to another embodiment of the present invention;

[0040] Figure 12 is Figure 11 A cross-sectional view of the transformer skeleton shown in;

[0041] Figure 13 Schematic diagram of the structure of a transformer skeleton according to another embodiment of the present invention.

[0042] Reference numerals:

[0043] Transformer 100,

[0044] Winding 1, insulating member 10, primary winding 11, secondary winding 12, sub-secondary coil 121,

[0045] Transformer skeleton 2,

[0046] Winding post 21, central axis 210 of the winding post, winding post body 211,

[0047] First baffle 212, first wire groove 212a, first body part 2121, first extension part 2122,

[0048] Second baffle 213,

[0049] First side plate 22, pin 220, first wire passing groove 221, second wire passing groove 222, first wall surface 223,

[0050] Second side plate 23, wire hanging part 231, wire hanging groove 231a. Detailed implementation manners

[0051] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0052] Below, with reference to Figures 1 - 13 Describe the transformer 100 according to an embodiment of the present invention. The transformer 100 can be a vertical transformer (for example, as Figures 1 - 12 shown) or a horizontal transformer (for example, as Figure 13 shown), etc., and is not limited thereto.

[0053] As Figures 1 - 12 shown, the transformer 100 according to an embodiment of the present invention includes a winding 1 and a transformer skeleton 2.

[0054] The winding 1 includes a primary winding 11 and a secondary winding 12 which are wound successively from the inside outwards. The secondary winding 12 includes secondary coils, and the secondary coils include at least one layer of sub-secondary coils 121. The transformer skeleton 2 includes a winding column 21 and a first side plate 22. The winding 1 is wound around the winding column 21. The first side plate 22 is arranged at one axial end of the winding column 21. A plurality of pins 220 are arranged on the first side plate 22. An over-wire groove penetrating through the first side plate 22 along the axial direction of the winding column 21 is formed at the edge of the first side plate 22. The over-wire groove includes a first over-wire groove 221 and a second over-wire groove 222. The primary winding 11 has a plurality of winding ends. At least one winding end of the primary winding 11 passes through the corresponding first over-wire groove 221 and is connected to the corresponding pin 220. The winding ends of the secondary winding 12 pass through the corresponding second over-wire groove 222 and are connected to the corresponding pins 220.

[0055] For example, as Figures 1 - 12 shown, the winding column 21 can be generally formed into a columnar structure. The primary winding 11 and the secondary winding 12 can be wound around the winding column 21 successively from the inside outwards. That is to say, first the primary winding 11 is wound around the winding column 21, and then the secondary winding 12 is wound outside the primary winding 11.

[0056] The first side plate 22 is arranged at one axial end of the winding column 21 (for example, Figure 1 the lower end in

[0057] The primary winding 11 may include multiple coils, each coil having two winding ends, one of the two winding ends being the incoming line end and the other being the outgoing line end. There may be multiple first wire grooves 221, and the multiple first wire grooves 221 may be arranged at intervals along the circumferential direction of the winding column 21. At least one winding end of the primary winding 11 may pass through the corresponding first wire groove 221 along the axial direction of the winding column 21 and be connected to the corresponding pin 220. Thus, the first wire groove 221 can play a role in limiting the wire routing of the primary winding 11, facilitating the wire routing arrangement of the primary winding 11. There may be multiple second wire grooves 222, and the multiple second wire grooves 222 may be arranged at intervals along the circumferential direction of the winding column 21. The secondary winding includes a secondary coil, and the secondary coil has two winding ends. The two winding ends of the secondary coil may pass through the corresponding second wire groove 222 along the axial direction of the winding column 21 and be connected to the corresponding pin 220. Thus, the second wire groove 222 can play a role in limiting the wire routing of the secondary winding 12, facilitating the wire routing arrangement of the secondary winding 12. Wherein, the distance between the center of the second wire groove 222 and the central axis 210 of the winding column may be greater than the distance between the center of the first wire groove 221 and the central axis 210 of the winding column. Wherein, the number of the first wire grooves 221 and the number of the second wire grooves 222 may be specifically set according to actual requirements.

[0058] Here, it should be noted that the meaning of "multiple" is two or more; the "incoming line end" and the "outgoing line end" are relative concepts. If one end of the coil is the incoming line end, then the other end of the coil is the outgoing line end. The direction "inward" refers to the direction close to the central axis 210 of the winding column, and its opposite direction is defined as "outward". The "one-layer sub-secondary coil 121" may include multiple turns of coils, and the multiple turns of coils are arranged in sequence along the axial direction of the winding column 21, and adjacent two turns of coils are connected in series. When the secondary coil includes multiple layers of sub-secondary coils 121, the multiple layers of sub-secondary coils 121 may be arranged from the inside to the outside in sequence, and adjacent two layers of sub-secondary coils 121 may be connected in series.

[0059] On the cross-section of the winding column 21, the projection of the contact part between the edge of the first wire groove 221 adjacent to the axial end of the winding column 21 (for example, Figure 1 the upper end in) and the corresponding primary winding 11 is located inside the projection of the cross-section center line of the one-layer sub-secondary coil 121 adjacent to the central axis 210 of the winding column. For example, as Figure 1 、 Figure 2 and Figure 7 shown, the edge of the first wire groove 221 adjacent to the above-mentioned axial end of the winding column 21 may be the wall surface of the first wire groove 221 and the side of the first side plate 22 adjacent to the winding column 21 (for example, Figure 1The intersection line between the upper (side) surface in [description] can be denoted as intersection line P. The contact part between the upper edge of the first wire groove 221 and the corresponding primary winding 11 can be denoted as contact part Q. That is to say, contact part Q is the contact part between intersection line P and the wire routing within the corresponding first wire groove 221. Thus, each first wire groove 221 corresponds to a contact part Q. On the cross-section of the winding column 21, the projection of the cross-section center line of a layer of sub-secondary coils 121 adjacent to the central axis 210 of the winding column can be the projection of the cross-section center line of one turn of the coil of this layer of sub-secondary coils 121. The cross-section center line of this turn of the coil can be denoted as reference part O. Reference part O refers to the curve formed by connecting the cross-section centers O’ of the wires enclosing the above-mentioned one turn of the coil in sequence. Reference part O can be roughly formed as a closed curve. The projection of contact part Q on the cross-section of winding column 21 is located inside the projection of reference part O on the cross-section of winding column 21. That is to say, in the radial direction of winding column 21, the projection of contact part Q on the cross-section of winding column 21 is located inside the projection of reference part O on the cross-section of winding column 21. Thus, the wire routing of the primary winding 11 within the first wire groove 221 can be arranged inside the secondary winding 12, such that there is a certain spacing distance between the wire routing of the primary winding 11 within the first wire groove 221 and the secondary winding 12, realizing the isolation between the primary winding 11 and the secondary winding 12, avoiding the contact crossing of the primary winding 11 and the secondary winding 12 and not meeting the safety regulations requirements, effectively improving the yield rate of the transformer 100. At the same time, there is no need to sleeved a Teflon tube or stick a folded tape at the cross-contact position between the primary winding 11 and the secondary winding 12 to achieve isolation, simplifying the processing technology of the transformer 100, avoiding excessive investment in manpower and material resources, and because there is no need to set Teflon tubes or stick folded tapes, etc., it is convenient to realize the fully automated production mode of the transformer 100, so as to improve the production efficiency of the transformer 100 and reduce the production cycle.

[0060] Among them, as Figure 5 shown, the cross-section of the winding column 21 refers to the plane perpendicular to the central axis 210 of the winding column. For example, in Figures 1 - 5 it, the cross-section of the winding column 21 is the horizontal plane perpendicular to the Figures 1 - 5 paper surface in it.

[0061] Since in the radial direction of the winding column 21, the projection of the contact part Q on the cross-section of the winding column 21 is located inside the projection of the reference part O on the cross-section of the winding column 21, at this time, at least a part of the projection of the edge of the first wire groove 221 wall adjacent to the winding column 21 on the cross-section of the winding column 21 is located inside the reference part O, such that at least a part of the projection of the intersection line P on the cross-section of the winding column 21 is located inside the reference part O. For example, as Figure 8As shown, a part of the projection of the edge of the first wire groove 221 adjacent to the winding post 21 on the cross-section of the winding post 21 is located inside the reference part O, and another part of the projection of the edge of the first wire groove 221 adjacent to the winding post 21 on the cross-section of the winding post 21 is located outside the reference part O, that is, a part of the projection of the intersection line P on the cross-section of the winding post 21 is located inside the reference part O, and another part is located outside the reference part O; or, the entire projection of the edge of the first wire groove 221 adjacent to the winding post 21 on the cross-section of the winding post 21 is located inside the reference part O. At this time, the projection of the intersection line P on the cross-section of the winding post 21 is entirely located inside the reference part O.

[0062] When the sub-secondary coil 121 has one layer, the reference part O is the cross-section center line of one turn of the coil of this layer of the sub-secondary coil 121; when the sub-secondary coil 121 has multiple layers, the reference part O is the cross-section center line of one turn of the coil of the innermost layer of the sub-secondary coil 121. Among them, the projection of the cross-section center line of one layer of the sub-secondary coil 121 on the cross-section of the winding post 21 can be the projection of the cross-section center line of one turn of the coil of this layer of the sub-secondary coil 121, and the cross-section center line of this turn of the coil refers to the curve formed by connecting the cross-section centers O' of the wires enclosing this turn of the coil in sequence, that is, the curve formed by connecting the intersection points of the central axis perpendicular to the wire cross-section and the wire cross-section. For example, when the cross-section of the wire enclosing the sub-secondary coil 121 is circular, as Figure 2 and Figure 8 shown, the cross-section center line of one turn of the coil of the sub-secondary coil 121 is the curve formed by connecting the centers of the above-mentioned circles.

[0063] It can be understood that the contact part between the edge of the first wire groove 221 adjacent to the above-mentioned axial end of the winding post 21 and the corresponding primary side winding 11 should be understood in a broad sense, that is to say, whether there is direct contact between the edge of the first wire groove 221 adjacent to the above-mentioned axial end of the winding post 21 and the corresponding primary side winding 11, there is a contact part Q. For example, when the edge of the first wire groove 221 adjacent to the above-mentioned axial end of the winding post 21 is in direct contact with the wire routing in the first wire groove 221, the contact part Q can be the contact point between the intersection line P and the wire routing in the first wire groove 221 (for example, as Figure 2The shown or contact wire; when the edge of the first wire groove 211 adjacent to the above-mentioned axial end of the winding post 21 does not directly contact the wire in the first wire groove 221, and there is a suspension between the wire in the first wire groove 221 and the first wire groove 221, at this time, the contact part Q can be one end of the wire in the first wire groove 211 adjacent to the winding post 21. When the above-mentioned axial end of the first wire groove 221 is provided with a chamfer such as a rounded corner, an inverted C corner, etc., and the edge of the above-mentioned axial end of the first wire groove 221 adjacent to the winding post 21 directly contacts the wire in the first wire groove 221, the contact part Q can refer to the contact part between the intersection line between the chamfer and one side surface of the winding post 21 of the first side plate 22 and the wire of the corresponding primary side winding 11.

[0064] For the transformer 100 according to the embodiment of the present invention, by setting the projection of the contact part Q on the cross-section of the winding post 21 inside the projection of the reference part O on the cross-section of the winding post 21, a certain spacing distance is provided between the wire of the primary side winding 11 in the first wire groove 221 and the secondary side winding 12, realizing the isolation between the primary side winding 11 and the secondary side winding 12, avoiding the contact cross of the primary side winding 11 and the secondary side winding 12 and not meeting the safety regulations requirements, effectively improving the yield rate of the transformer 100. At the same time, there is no need to set a Teflon sleeve or stick a folded tape at the cross-contact position of the primary side winding 11 and the secondary side winding 12 to achieve isolation, simplifying the processing technology of the transformer 100, avoiding excessive investment in manpower and material resources, and because there is no need to set a Teflon sleeve or stick a folded tape, etc., it is convenient to realize the fully automated production mode of the transformer 100 to improve the production efficiency of the transformer 100 and reduce the production cycle. Among them, the contact part Q is the projection of the contact part between the edge of the axial end of the first wire groove 221 adjacent to the winding post 21 and the corresponding primary side winding 11 on the cross-section of the winding post 21, and the reference part O is the projection of the center line of the cross-section of one turn of the coil of a layer of sub-secondary coil 121 adjacent to the central axis 210 of the winding post 1 on the cross-section of the winding post 21.

[0065] Specifically, the cross-section of the winding post 21 has a first direction and a second direction that are perpendicular to each other. The first wire groove 221 is recessed along the first direction. In the second direction, the edge of the axial end of the first wire groove 221 adjacent to the winding post 21 through which the winding end of the primary side winding 11 passes is located between the two ends of the center line of the cross-section of the sub-secondary coil 121. For example, as Figure 1 , Figure 2 , Figure 8 , Figure 11 and Figure 12 shown, the cross-section of the winding post 21 can be roughly formed into an annular structure, and the first direction can be Figure 8 , Figure 11 and Figure 12the front-rear direction. The second direction may be Figure 1 , Figure 8 and Figure 12 the left-right direction. The first wire groove 221 may be recessed from a part of the front side wall or a part of the rear side wall of the first side plate 22 in the front-rear direction. At this time, the first wire groove 221 has two side walls that are opposite to each other in the left-right direction, and the two side walls may extend vertically in the up-down direction. The two ends of the center line of the cross-section of the sub-secondary coil 121 may refer to the two ends of the reference portion O in the second direction (i.e., the left-right direction), that is, the left end and the right end of the reference portion O; in the left-right direction, the intersection line P corresponding to the first wire groove 221 through which the winding end of the primary side winding 11 passes is located between the left end of the reference portion O and the right end of the reference portion O. That is to say, on the cross-section of the winding column 21, the projection of the corresponding intersection line P is located between the projection of the left end of the reference portion O and the projection of the right end of the reference portion O in the left-right direction, so that the above two side walls of the first wire groove 221 are both located between the left end of the reference portion O and the right end of the reference portion O in the left-right direction, thereby facilitating ensuring that the projection of the contact portion Q on the cross-section of the winding column 21 is located inside the projection of the reference portion O on the cross-section of the winding column 21. During the automatic winding production process of the transformer 100, there is a certain distance between the wire routing of the primary side winding 11 in the first wire groove 221 and the secondary side winding 12 on the winding column 21, realizing electrical isolation between the primary side winding 11 and the secondary side winding 12, and avoiding contact crossing between the primary side winding 11 and the secondary side winding 12, which does not meet the safety regulations requirements, effectively improving the yield rate of the transformer 100. Among them, in the second direction, the two ends of the center line of the cross-section of the sub-secondary coil 121 may be understood as the two end edges of the center line of the cross-section of the sub-secondary coil 121 in the second direction.

[0066] Specifically, in the examples of Figure 1 , Figure 2 and Figure 8 , the winding column 21 may be generally formed into a square columnar structure, the cross-section of the winding column 21 may be formed into a square ring structure, the reference portion O may be generally formed into a square structure, the first direction may be the length direction of the cross-section of the winding column 21, the second direction may be the width direction of the cross-section of the winding column 21. In the second direction, the two ends of the center line of the cross-section of the sub-secondary coil 121, that is, the reference portion O, may be respectively generally formed into two edge lines, and the two edge lines may be arranged in parallel at intervals. In the second direction, the intersection line P corresponding to the first wire groove 221 through which the winding end of the primary side winding 11 passes is located between the above two edge lines; for another example, in the examples of Figure 11 and Figure 12 , the winding column 21 may be generally formed into a cylindrical structure, the cross-section of the winding column 21 may be formed into a circular ring, the reference portion O may be generally formed into a circular structure, the first direction may be Figure 11 and Figure 12The front-back direction and the second direction in Figure 11 and Figure 12 the left-right direction in. At both ends of the center line of the cross-section of the sub-secondary coil 121, which is the reference part O, in the left-right direction, two edge points can be approximately formed respectively. In the left-right direction, the intersection line P corresponding to the first wire groove 221 through which the winding end of the primary side winding 11 passes is located between the above two edge points.

[0067] Furthermore, the first wire groove 221 through which the winding end of the primary side winding 11 passes is recessed along the first direction until it is lower than the position of the innermost sub-secondary coil 121. The innermost sub-secondary coil 121 is the layer of the sub-secondary coil 121 adjacent to the central axis of the winding post 21. For example, in Figure 8 the example of, the rear side wall of the front-side first wire groove 221 is recessed backward to the inside of the center line of the cross-section of the innermost sub-secondary coil 121, and the front side wall of the rear-side first wire groove 221 is recessed forward to the inside of the center line of the cross-section of the innermost sub-secondary coil 121, thereby further avoiding the situation that the wire routing of the primary side winding 11 in the first wire groove 221 contacts the secondary side winding 12 on the winding post 21 during the automatic winding production process of the transformer 100, meeting the safety regulations requirements, and further ensuring the yield rate of the transformer 100.

[0068] In some embodiments of the present invention, the winding post 21 includes a winding post body 211 and at least one baffle. The primary side winding 11 is wound around the winding post body 211. The baffle is arranged at the end of the winding post body 211. The baffle surrounds the winding post body 211 and is arranged in sequence with the primary side winding 11 along the axial direction of the winding post 21. In the cross-section of the winding post 21, the projection of the outer edge of the baffle is located outside the projection of the outer contour of the primary side winding 11, or the projection of the outer edge of the baffle is aligned with the projection of the outer contour of the primary side winding 11.

[0069] For example, as Figures 3 - 12As shown, the winding column body 211 is formed into a columnar structure. There can be two baffles. The primary side winding 11 is located between the two baffles. Each baffle can be formed into an annular structure. Each baffle surrounds the outside of the winding column body 211, and each baffle can be formed by the at least partial outer edge of the corresponding end of the winding column body 211 extending radially along the winding column body 211. In the radial direction of the winding column 21, the projection of the outer contour of the primary side winding 11 on the cross-section of the winding column 21 does not exceed the projection of the outer edge of the baffle on the cross-section of the winding column 21. Thus, by providing baffles at the ends of the winding column body 211, the baffles can play a certain limiting role on the primary side winding 11, enabling the transformer 100 to meet the requirements of dielectric strength; by setting the outer contour of the primary side winding 11 not to exceed the outer edge of the baffle in the radial direction of the winding column 21, the limiting effect of the baffle on the primary side winding 11 is ensured, thereby ensuring that the transformer 100 has sufficient safety distance and improving the dielectric strength of the transformer 100.

[0070] In some alternative embodiments of the present invention, there is one baffle. The baffle is located at the axial end of the winding column body 211 adjacent to the first side plate 22. A plurality of wire grooves penetrating the baffle along the axial direction of the winding column 21 are formed at the edge of the baffle. Each wire groove can be formed by the inward indentation of a part of the outer peripheral wall of the baffle. The plurality of wire grooves are correspondingly communicated with the plurality of first wire passing grooves 221; alternatively, when there is one baffle, the baffle can also be provided at the axial other end of the winding column body 211 away from the first side plate 22. At this time, a plurality of wire grooves penetrating the baffle along the axial direction of the winding column 21 are also formed at the edge of the baffle, so that the baffle has a certain design flexibility and can ensure the dielectric strength of the transformer 100 according to requirements.

[0071] Among them, when the baffle is provided at the above-mentioned axial end of the winding column body 211 adjacent to the first side plate 22, by providing wire grooves on the baffle, the winding end of the primary side winding 11 passes through the wire grooves and the first wire passing grooves communicated therewith. In this way, a certain spacing distance can be provided between the wire routing of the primary side winding 11 and the secondary side winding 12 on the winding column 21, further ensuring the electrical isolation between the primary side winding 11 and the secondary side winding 12, which is more conducive to avoiding the contact cross of the primary side winding 11 and the secondary side winding 12 not meeting the safety regulations requirements, improving the yield of the transformer, and facilitating the automated winding production of the transformer 100 and reducing the production cost.

[0072] When the baffle is provided at the other axial end of the winding column body 211 away from the first side plate 22, by providing a wire routing groove on the baffle, when the winding end of the primary side winding 11 passes through the wire routing groove, it is also possible to make a certain spacing distance between the wire routing of the primary side winding 11 and the secondary side winding 12 on the winding column 21, further ensuring electrical isolation between the primary side winding 11 and the secondary side winding 12 and avoiding potential safety hazards.

[0073] In some other alternative embodiments of the present invention, such as Figures 3 - 12 shown, there are two baffles, which are the first baffle 212 and the second baffle 213 respectively. The first baffle 212 is located at one axial end of the winding column body 211 adjacent to the first side plate 22 (for example, Figure 4 the lower end in [a certain example]), and the first baffle 212 can be arranged closely against the first side plate 22. The first baffle 212 can be provided on one side of the first side plate 22 adjacent to the winding column 21. The second baffle 213 is located at the other axial end of the winding column body 211 away from the first side plate 22 (for example, Figure 4 the upper end in [a certain example]). The primary side winding 11 is located between the first baffle 212 and the second baffle 213. A plurality of first wire routing grooves 212a penetrating the first baffle 212 along the axial direction of the winding column 21 are formed at the edge of the first baffle 212. The plurality of first wire routing grooves 212a can be arranged at intervals along the circumferential direction of the winding column 21. Each first wire routing groove 212a can be formed by inwardly recessing a part of the outer peripheral wall of the first baffle 212. The plurality of first wire routing grooves 212a are correspondingly communicated with a plurality of first wire passing grooves 221. A plurality of second wire routing grooves penetrating the second baffle 213 along the axial direction of the winding column 21 are formed at the edge of the second baffle 213. At least one winding end of the primary side winding 11 can pass through the corresponding first wire routing groove 212a and the corresponding first wire passing groove 221 in sequence along the axial direction of the winding column 21 to be connected to the corresponding pin 220.

[0074] Thus, by providing two baffles, the limiting effect of the baffle on the primary side winding 11 is further improved, the safety distance of the transformer 100 is ensured, and the dielectric strength of the transformer 100 is further improved; by providing a plurality of first wire routing grooves 212a on the first baffle 212, a plurality of second wire routing grooves on the second baffle 213, and making the plurality of first wire routing grooves 212a correspond to the plurality of first wire passing grooves 221, the influence of the first baffle 212 and the second baffle 213 on the wire routing arrangement of the primary side winding 11 is avoided, the wire routing of the primary side winding 11 is facilitated, and at the same time, the first wire routing groove 212a can play a certain limiting role in the wire routing of the primary side winding 11, reducing the material consumption of the first baffle 212 and the second baffle 213, reducing costs, and also having the above-mentioned electrical safety effect.

[0075] It can be understood that the multiple first wire grooves 212a are correspondingly arranged with the multiple first wire passing grooves 221, which may include that the number of the first wire grooves 212a is equal to the number of the first wire passing grooves 221, or may include that the number of the first wire grooves 212a is not equal to the number of the first wire passing grooves 221. When the number of the first wire grooves 212a is equal to the number of the first wire passing grooves 221, the multiple first wire grooves 212a can be arranged in one-to-one correspondence with the multiple first wire passing grooves 221. At this time, the first wire groove 212a and the corresponding first wire passing groove 221 can be arranged oppositely along the axial direction of the winding column 21, which further facilitates the wire routing arrangement of the primary side winding 11. When the number of the first wire grooves 212a is not equal to the number of the first wire passing grooves 221, the number of the first wire grooves 212a can be less than the number of the first wire passing grooves 221, and at least one first wire groove 212a can be correspondingly arranged with the multiple first wire passing grooves 221, but it is not limited thereto.

[0076] Optionally, as Figures 5 - 7 shown, in the axial direction of the winding column 21, the thickness of the baffle 212 is a, and a satisfies: 0.2 mm ≤ a ≤ 3 mm. In the radial direction of the winding column 21, the width of the baffle 212 is b, and b satisfies: 0.2 mm ≤ b ≤ 5 mm. Thus, the first baffle 212 has appropriate thickness and width, ensuring the reliability of use of the first baffle 212. Among them, when there are two baffles, the thicknesses and widths of the two baffles can be equal or unequal.

[0077] Specifically, the depth of the wire groove is c, and c satisfies: c ≥ b. When c = b, as Figure 7 shown, the first wire groove 212a can penetrate the inner peripheral wall and the outer peripheral wall of the first baffle 212 along the radial direction of the winding column 21. At this time, the first wire groove 212a can be jointly defined by the winding column body 211 and the first baffle 212, and a part of the outer peripheral wall of the winding column body 211 can form a part of the inner wall of the first wire groove 212a. When c > b, the first wire groove 212a penetrates the inner peripheral wall and the outer peripheral wall of the first baffle 212 along the radial direction of the winding column 21. At this time, the first wire groove 212a can also be jointly defined by the winding column body 211 and the first baffle 212, and the first wire groove 212a is recessed into the winding column body 211. Thus, by setting the depth c of the first wire groove 212a to be greater than or equal to the width b of the first baffle 212, the first wire groove 212a has an appropriate depth, ensuring a large interval between the wire routing of the primary side winding 11 in the first wire groove 212a and the secondary side winding 12, having a sufficient safety distance, thereby ensuring the electrical isolation effect between the primary side winding 11 and the secondary side winding 12.

[0078] It can be understood that the depth c of the first wire groove 212a can also be less than the width b of the first baffle 212, as Figure 7As shown. Here, it should be noted that the "depth of the first wire groove 212a" refers to the dimension of the first wire groove 212a in the radial direction of the winding post 21.

[0079] As Figure 7 shown, the winding post body 211 is a hollow structure. A cavity can be defined inside the winding post body 211, and the iron core of the transformer 100 can be placed inside the above cavity. The cross-sectional shape of the winding post body 211 is an annular structure, such as a square annular structure, a circular annular structure, etc.; the wall thickness of the winding post body 211 is t, and t satisfies: t≥0.4mm, thereby ensuring the strength of the winding post body 211 and ensuring the reliability of use of the transformer 100.

[0080] Furthermore, as Figures 1 - 3 shown, an insulating member 10 is provided between the primary winding 11 and the secondary winding 12. The insulating member 10 wraps the primary winding 11 and the baffle, so that the insulating member 10 can completely isolate the primary winding 11 and the secondary winding 12; since the insulating member 10 wraps the two baffles, the length of the primary winding 11 is less than the length of the insulating member 10 in the axial direction of the winding post 21, further ensuring the isolation effect of the insulating member 10.

[0081] Among them, the insulating member 10 can be selected as an insulating tape, but is not limited thereto. When the insulating member 10 is an insulating tape, the insulating tape can be one layer or multiple layers.

[0082] In a further embodiment of the present invention, as Figures 1 - 3 shown, in the axial direction of the winding post 21, the length of the winding post 21 is l1 and the length of the insulating member 10 is l2. l1 and l2 satisfy: 0.5mm≤l2 - l1≤2mm. Thus, when the insulating member 10 wraps the primary winding 11 and the baffle, the insulating member 10 has a surplus part in the axial direction of the winding post 21. When the first baffle 212 is closely attached to the first side plate 22, the above surplus part can be provided at both axial ends of the insulating member 10. For example, the above surplus part can be provided at the axial end of the insulating member 10 adjacent to the first side plate 22, so that the surplus part can be folded under the action of the first side plate 22, thereby increasing the isolation area of the insulating member 10 and further enhancing the isolation effect of the insulating member 10; of course, the above surplus part can also be provided at the axial end of the insulating member 10 far from the first side plate 22, and the isolation effect of the insulating member 10 can also be enhanced, but is not limited thereto.

[0083] Optionally, the baffle includes a body part and an extension part. The body part surrounds the winding post body 211, and the extension part is provided at the outer edge of the body part and the extension part protrudes from the outer edge of the body part along the radial direction of the winding post 21. For example, as Figure 11 and Figure 12As shown in the figure, the first baffle 212 includes a first body portion 2121 and a first extension portion 2122. The first body portion 2121 can be disposed around the outer peripheral wall of the winding post body 211. The first extension portion 2122 is disposed at the outer edge of the first body portion 2121 and the first extension portion 2122 protrudes radially from the outer peripheral wall of the first body portion 2121 along the winding post 21. Thus, by providing the first extension portion 2122, the width of the first baffle 212 is relatively large, ensuring the limiting effect of the first baffle 212 on the secondary side winding 12, further ensuring the safety distance between the windings of the transformer 100. At the same time, the first extension portion 2122 can enhance the structural strength of the first side plate 22, thereby improving the overall structural strength of the transformer skeleton 2, extending the service life of the transformer skeleton 2, and further ensuring the reliability of the transformer 100 during use.

[0084] The first extension portion 2122 can penetrate through the insulating member 10. That is to say, the first body portion 2121 is located inside the insulating member 10, and the first extension portion 2122 is located outside the insulating member 10. In the cross-section of the winding post 21, the projection of the outer edge of the first extension portion 2122 is located outside the projection of the outer contour of the secondary side winding 12, or the projection of the outer edge of the first extension portion 2122 is aligned with the projection of the outer contour of the secondary side winding 12. That is to say, in the radial direction of the winding post 21, the projection of the outer contour of the secondary side winding 12 on the cross-section of the winding post 21 does not exceed the projection of the outer edge of the first extension portion 2122, so that the first extension portion 2122 can limit the movement of the secondary side winding 12 along the axial direction of the winding post 21 towards the direction close to the first side plate 22, ensuring that there is always a sufficient safety distance between the secondary side winding 12 and the wiring of the primary side winding 11 on the first side plate 22, and avoiding contact between the secondary side winding 12 and the primary side winding 11 during the use of the transformer 100 due to the axial movement of the secondary side winding 12 along the winding post 21, further enabling the transformer 100 to meet the safety regulations requirements.

[0085] It can be understood that, as Figures 1 - 10 shown in the figure, the first baffle 212 may also only include the first body portion 2121 and not include the first extension portion 2122; the second baffle 213 may be completely located inside the insulating member 10; the second baffle 213 may include a second body portion and a second extension portion.

[0086] In some specific embodiments of the present invention, a wiring groove is provided on the baffle, and the wiring groove is provided in the extension portion or penetrates through the extension portion. For example, in Figure 11 and Figure 12In the example, a first wire groove 212a is formed on the first baffle 212. The first wire groove 212a can be defined only by the first extension portion 2122. At this time, the depth of the first wire groove 212 can be less than the width of the first extension portion 2122; or the first wire groove 212a can be jointly defined by the first extension portion 2122 and the first body portion 2121. The first wire groove 212a can penetrate through the first extension portion 2122. At this time, the depth of the first wire groove 212a can be greater than or equal to the width of the first extension portion 2122. The first extension portion 2122 can be formed by the outer edge of the portion of the first body portion 2121 that defines the first wire passing groove 221 protruding radially along the winding column 21, so that the structure of the first baffle 212 is relatively regular.

[0087] It can be understood that the first extension portion 2122 can also not participate in defining the first wire passing groove 221, so that the first extension portion 2122 and the first wire passing groove 221 are arranged at intervals, and the transformer 100 can also meet the safety regulations requirements and ensure the use reliability of the transformer 100.

[0088] In a further embodiment of the present invention, a second side plate 23 is provided at the axial other end of the winding column 21. At least one wire hanging portion 231 is provided on the second side plate 23. The wire hanging end is wound around the wire hanging portion 231, where the wire hanging end is a winding end of the primary side winding 11. For example, as Figures 1 - 5 shown in FIGS. 10 and 11, the second side plate 23 can be arranged substantially parallel to the first side plate 22. Two wire hanging portions 231 are provided on the second side plate 23. The two wire hanging portions 231 can be both arranged on the side of the second side plate 23 away from the winding column 21, and the two wire hanging portions 231 can be arranged at intervals along the circumferential direction of the winding column 21. The wire hanging end can be arranged on the wire hanging portion 231. At this time, the wire hanging end does not need to be buried in the coil, thereby improving the winding method of the coil of the primary side winding 11, enabling the coil of the primary side winding 11 to realize machine automatic winding, improving the assembly and processing efficiency of the transformer 100, and at the same time, the primary side winding 11 is not prone to short circuit, improving the safety performance of the transformer 100.

[0089] It can be understood that the number of the wire hanging portions 231 can also be specifically set to one, three or four according to actual needs, so that the position of the wire hanging end has good flexibility; the specific structure of the wire hanging portion 231 can be specifically set according to actual applications, as long as it is ensured that the wire hanging end can be wound around the wire hanging portion 231, and the winding method of the primary side winding 11 on the wire hanging portion 231 can be specifically set according to actual applications.

[0090] Specifically, as Figure 5 shown in FIG. 12, the wire hanging portion 231 and the end of the second side plate 23 adjacent to the center of the winding column 21 (for example, Figure 5The distance between the lower end in [[]] and the winding post 21 is x, where 0.2 mm ≤ x ≤ 0.8 mm, so that there is an appropriate distance between the wire hanging part 231 and the winding post 21. Thus, on the premise of ensuring the working performance of the wire hanging part 231, there is sufficient space between the coil part of the primary winding 11 on the wire hanging part 231 and the coil part of the primary winding 11 on the winding post 21, avoiding contact between the coil part of the primary winding 11 on the wire hanging part 231 and the coil part of the primary winding 11 on the winding post 21, which may cause a short circuit, and further improving the safety performance of the transformer 100.

[0091] Optionally, as Figure 11 shown, at least one wire hanging groove 231a is formed on the wire hanging part 231, and at least a part of the wire hanging end is located in the wire hanging groove 231a. Thus, the wire hanging groove 231a can limit the part of the wire hanging end wound around the wire hanging part 231, preventing the part of the wire hanging end wound around the wire hanging groove 231a from falling off the wire hanging part 231, and improving the reliability of use of the wire hanging part 231.

[0092] Specifically, as Figure 11 shown, there are multiple wire hanging grooves 231a, and the multiple wire hanging grooves 231a are arranged in sequence along the radial direction of the winding post 21. Each wire hanging groove 231a can be formed by recessing a part of the surface on the side of the wire hanging part 231 away from the center of the winding post 21 (for example, Figure 11 the upper side in [[]]), such that one side of each wire hanging groove 231a away from the center of the winding post 21 is open, and each wire hanging groove 231a can extend in a straight line. The structures of the multiple wire hanging grooves 231a can be the same, so that the structure of the wire hanging groove 231a is simple and easy to implement. It can be understood that the wire hanging groove 231a can also be set to one; the wire hanging groove 231a can also be formed by recessing a part of the side surface of the wire hanging part 231, where the side surface is the two side surfaces of the wire hanging part 231 along the circumferential direction of the winding post 21.

[0093] In some specific embodiments of the present invention, the primary side winding 11 includes a primary coil, a feedback coil, and a shielding coil. The primary coil, the feedback coil, and the shielding coil can all be formed into a ring structure. Radially on the winding post 21, the feedback coil is located between the primary coil and the shielding coil. The primary coil, the feedback coil, and the shielding coil all have winding ends. Two winding ends of the primary coil can respectively pass through corresponding first wire grooves 221 to be connected to corresponding pins 220. Two winding ends of the feedback coil can respectively pass through corresponding first wire grooves 221 to be connected to corresponding pins 220. One winding end of the shielding coil passes through a corresponding first wire groove 221 to be connected to a corresponding pin 220, and the other winding end of the shielding coil is wound around the wire hanging portion 231. At this time, the above-mentioned other winding end of the shielding coil does not need to be manually buried in the primary side winding 11, thus realizing the automatic winding of the primary side winding 11. Among them, the winding order of the primary coil, the feedback coil, and the shielding coil can be specifically set according to actual situations. For example, the primary coil, the feedback coil, and the shielding coil can be arranged in sequence from the inside to the outside. The primary coil and the feedback coil can be isolated by an insulating tape, and the feedback coil and the shielding coil can be isolated by an insulating tape. Another example is that the primary coil, the shielding coil, and the feedback coil can be arranged in sequence from the inside to the outside. The primary coil and the shielding coil can be isolated by an insulating tape, and the shielding coil and the feedback coil can be isolated by an insulating tape.

[0094] In some embodiments of the present invention, as Figure 10 shown, the wire groove can be generally formed into a U-shaped groove. One side of the wire groove away from the central axis 210 of the winding post is open to form an opening. The opposite side walls of the opening can extend towards each other in the direction towards the center of the wire groove, so that the width of the opening gradually decreases in the direction towards the center of the wire groove. During the production process of the transformer 100, the wire routing in the wire groove can better move to the bottom of the corresponding wire groove under the guiding action of the opening, avoiding the wire routing in the wire groove from floating out of the wire groove and causing the primary side winding 11 to contact the secondary side winding 12, so that the transformer 100 meets the safety regulations requirements.

[0095] Of course, as Figures 1 - 8 shown, the width of the opening can also remain unchanged in the direction towards the center of the wire groove. Here, it should be noted that the "bottom of the wire groove" refers to the side of the wire groove away from the corresponding opening along the concave direction of the wire groove.

[0096] In some alternative embodiments of the present invention, the wall surface of the wire groove includes a first wall surface 223. The first wall surface 223 is one of the two opposite side wall surfaces of the wire groove adjacent to the corresponding pin 220. The first wall surface 223 of at least one wire groove extends obliquely in the axial direction of the winding post 21 towards the direction close to the corresponding pin 220. For example, in Figure 9In the example, at least part of the wiring in the wire trough is arranged along the first wall surface 223, and the first wall surface 223 of at least one wire trough extends obliquely downward and close to the corresponding pin 220 from top to bottom, so that the lower end of the wiring in the wire trough can be slowly transitioned, avoiding damage to the wiring, playing a role in protecting the wiring, and at the same time facilitating the quick entry and exit of the primary winding 11 and the secondary winding 12 in the wire trough.

[0097] Specifically, as Figure 9 shown, three first wire troughs 221 are formed on the left side of the first side plate 22. The three first wire troughs 221 are spaced at intervals in the left-right direction. The three first wire troughs 221 are arranged in one-to-one correspondence with the three pins 220. That is to say, the left first wire trough 221 is arranged corresponding to the left pin 220 and the left pin 220 is located on the left side of the left first wire trough 221, the middle first wire trough 221 is arranged corresponding to the middle pin 220 and the middle pin 220 is located on the right side of the middle first wire trough 221, and the right first wire trough 221 is arranged corresponding to the right pin 220 and the right pin 220 is located on the right side of the right first wire trough 221. Then, the left side wall of the left first wire trough 221 is the corresponding first wall surface 223, and at least part of the wiring in the left first wire trough 221 is arranged on the first wall surface 223, and this first wall surface 223 can extend obliquely from top to bottom and towards the direction close to the left pin 220. The right side wall of the right first wire trough 221 is the corresponding first wall surface 223, and at least part of the wiring in the right first wire trough 221 is arranged on the first wall surface 223, and this first wall surface 223 can extend obliquely from top to bottom and towards the direction close to the right pin 220. At least part of the wiring in the middle first wire trough 221 is arranged along the right side wall of the middle first wire trough 221, and the right side wall of the middle first wire trough 221 can extend vertically in the up-down direction. That is to say, the wall surface of the middle first wire trough 221 does not include the first wall surface 223.

[0098] Of course, the wall surface of the wire trough may further include a second wall surface. The second wall surface can extend obliquely towards the direction close to the corresponding pin 220 along the axial direction of the winding column 21 or can extend vertically along the axial direction of the winding column 21. The second wall surface is the side wall surface away from the corresponding pin 220 among the two opposite side wall surfaces of the wire trough.

[0099] Other components and operations of the transformer 100 according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0100] The power supply according to the second aspect embodiment of the present invention includes the transformer 100 according to the first aspect embodiment of the present invention above. Among them, the power supply may be an external power supply. At this time, the power supply may be a power adapter, such as a charging plug for a mobile phone, but is not limited thereto.

[0101] According to the power supply of the embodiment of the present invention, by adopting the above-mentioned transformer 100, the processing technology of the power supply is simplified, the processing efficiency of the power supply is improved, the automated production mode of the power supply is facilitated, and at the same time, the yield rate of the power supply is effectively improved.

[0102] The following refers to Figures 1 - 13 The transformer 100 according to the embodiment of the present invention will be described in detail with four specific embodiments. It should be understood that the following description is only an exemplary illustration and not a specific limitation of the invention.

[0103] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "lateral", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0104] Embodiment 1

[0105] In this embodiment, as Figures 1 - 8As shown, the transformer 100 is a vertical transformer. The transformer 100 includes a winding 1 and a transformer skeleton 2. The winding 1 includes a primary winding 11 and a secondary winding 12 wound from the inside out in sequence. An insulating member 10 is provided between the primary winding 11 and the secondary winding 12. Axially on the winding column 21, the length of the winding column 21 is l1 and the length of the insulating member 10 is l2. The relationship between l1 and l2 satisfies: 0.5 mm ≤ l2 - l1 ≤ 2 mm. An insulating tape is wound outside the secondary winding 12. The primary winding 11 includes a primary coil, a feedback coil, and a shielding coil wound from the inside out in sequence. The primary coil and the feedback coil are isolated by an insulating tape, and the feedback coil and the shielding coil are isolated by an insulating tape. The secondary winding 12 includes a secondary coil, and the secondary coil includes a layer of sub-secondary coils 121. The transformer skeleton 2 includes a winding column 21 and a first side plate 22. The winding 1 is wound on the winding column 21. The first side plate 22 is provided at one axial end of the winding column 21. A plurality of pins 220 are provided on the first side plate 22. The plurality of pins 220 extend away from the center of the winding column 21. An undercut groove is formed at the edge of the first side plate 22 and axially penetrates the first side plate 22 along the winding column 21. The undercut groove includes a plurality of first undercut grooves 221 and a plurality of second undercut grooves 222. At the other axial end of the winding column 21, there is a second side plate 23. Two wire hanging portions 231 are provided on the second side plate 23. Both of the two wire hanging portions 231 are provided on the side of the second side plate 23 away from the winding column 21, and the two wire hanging portions 231 are arranged opposite to each other along the radial direction of the winding column 21. The interval x between each wire hanging portion 231 and the lower end of the second side plate 23 satisfies 0.2 mm ≤ x ≤ 0.8 mm, and each wire hanging portion 231 is formed with a plurality of wire hanging grooves 231a. The plurality of wire hanging grooves 231a are arranged in sequence along the radial direction of the winding column 21. Each wire hanging groove 231a is formed by recessing from a part of the upper surface of the wire hanging portion 231 downward.

[0106] Among them, a plurality of pins 220 are distributed at both ends of the first side plate 22 (i.e., Figure 8 the front end and the rear end in Figure 1 . For example, there may be six pins 220. Two of the pins 220 are respectively connected to the winding ends of the secondary coil correspondingly, and these two pins 220 are arranged adjacent to the rear end of the first side plate 22. The remaining four pins 220 are respectively connected to the winding ends of the primary winding 11 correspondingly. Three of the four pins 220 can be arranged adjacent to the front end of the first side plate 22, and these three pins 220 can be spaced from each other in the left-right direction (for example, Figure 8 the left-right direction in

[0107] ).Specifically, the winding post 21 includes a winding post body 211, a first baffle 212 and a second baffle 213. The winding post body 211 is generally formed into a square cylindrical structure, and the wall thickness t of the winding post body 211 satisfies t≥0.4 mm. The winding 1 is wound around the winding post body 211, and the primary side winding 11 is located between the first baffle 212 and the second baffle 213. The first baffle 212 is located at the lower end of the winding post body 211 and is closely attached to the first side plate 22. The first baffle 212 can be arranged on the side of the first side plate 22 adjacent to the winding post 21. The second baffle 213 is located at the upper end of the winding post body 211, and the second baffle 213 can be closely attached to the second side plate 23. A plurality of first wire grooves 212a penetrating the first baffle 212 along the axial direction of the winding post 21 are formed at the edge of the first baffle 212. The plurality of first wire grooves 212a are arranged at intervals along the circumferential direction of the winding post 21, and the plurality of first wire grooves 212a are arranged in one-to-one correspondence with the plurality of first wire passing grooves 221. Among them, the two winding ends of the primary coil respectively pass through the corresponding first wire groove 212a and the corresponding first wire passing groove 221 to be connected to the corresponding pin 220. The two winding ends of the feedback coil respectively pass through the corresponding first wire groove 212a and the corresponding first wire passing groove 221 to be connected to the corresponding pin 220. One winding end of the shielding coil passes through the corresponding first wire groove 212a and the corresponding first wire passing groove 221 to be connected to the corresponding pin 220, and the other winding end of the shielding coil is wound around the wire hanging portion 231. The secondary side winding 12 includes a secondary coil, and the two winding ends of the secondary coil respectively pass through the corresponding second wire passing grooves 222 to be connected to the corresponding pins 220.

[0108] On the cross-section of the winding post 21, the projection of the contact part between the edge of the first wire groove 221 adjacent to the axial end of the winding post 21 and the corresponding primary side winding 11 is located inside the projection of the cross-section center line of one turn of the sub-secondary coil 121. That is to say, on the same radial direction of the winding post 21, the projection of the contact part Q on the cross-section of the winding post 21 is located inside the projection of the reference part O on the cross-section of the winding post 21. Among them, the contact part Q is the contact part between the edge of the first wire groove 221 adjacent to the axial end of the winding post 21 and the corresponding primary side winding 11 on the cross-section of the winding post 21, and the reference part O is the curve formed by connecting the cross-section centers O' of the wires surrounding the above-mentioned one turn of the coil in sequence, that is, the cross-section center line of one turn of the sub-secondary coil 121. The contact part Q is a point, that is, the edge of each first wire groove 221 adjacent to the axial end of the winding post 21 and the corresponding primary side winding 11 are in point contact. At this time, a part of the projection of the edge of the first wire groove 221 adjacent to the winding post 21 on the cross-section of the winding post 21 is located inside the projection of the reference part O on the cross-section of the winding post 21, and another part of the projection of the edge of the first wire groove 221 adjacent to the winding post 21 on the cross-section of the winding post 21 is located outside the projection of the reference part O on the cross-section of the winding post 21. That is to say, on the cross-section of the winding post 21, a part of the projection of the intersection line P is located inside the projection of the reference part O, and another part is located outside the projection of the reference part O.

[0109] The wire groove is generally formed as a U-shaped groove. The side of the wire groove away from the central axis 210 of the winding post is open to form an opening, and the width of the opening remains unchanged; the opposite side walls of the wire groove extend vertically from the side of the first side plate 22 adjacent to the winding post 21 to the side of the first side plate 22 away from the winding post 21. Among them, the width of the wire groove can be designed to be relatively narrow, and the depth can be designed to be relatively large.

[0110] Furthermore, in the axial direction of the winding post 21, the thickness a of the first baffle 212 satisfies 0.2mm ≤ a ≤ 3mm, and in the radial direction of the winding post 21, the width b of the first baffle 212 satisfies 0.2mm ≤ b ≤ 5mm. The depth c of the first wire groove 212a = b.

[0111] The first baffle 212 includes a first body portion 2121 and a first extension portion 2122. The first body portion 2121 is disposed around the outer peripheral wall of the winding post body 211. The first extension portion 2122 is disposed at the outer edge of the first body portion 2121 and the first extension portion 2122 protrudes from the outer peripheral wall of the first body portion 2121 along the radial direction of the winding post 21, and the first extension portion 2122 and the first body portion 2121 together define a first wire passing groove 221. When the insulating member 10 wraps the first baffle 212, the first extension portion 2122 passes through the insulating member 10. At this time, the first body portion 2121 is located inside the insulating member 10 and the first extension portion 2122 is located outside the insulating member 10. Among them, the insulating member 10 is an insulating tape.

[0112] The following table is a comparison table of the cost, production efficiency, and overall performance of the transformer 100 according to the embodiment of the present invention and the traditional transformer. It can be seen from the table that the transformer 100 according to the embodiment of the present invention can save nearly half of the labor compared with the traditional transformer, reduce the man-hours, save nearly 20%-70% of the labor cost, and this model can save 3,400-5,500 yuan for every 10,000 pieces produced. At the same time, the transformer 100 according to the embodiment of the present invention can achieve automated production, has a high product yield, has good consistency and stability, and the production efficiency can be increased by 50%.

[0113]

[0114] Embodiment 2

[0115] As Figures 9 - 10 shown, the structure of this embodiment is substantially the same as that of Embodiment 1, where the same components use the same reference numerals. The difference is that the opposite side walls of the opening of at least one wire passing groove can extend closer to each other in the direction toward the center of the wire passing groove, so that the width of the opening gradually decreases in the direction toward the center of the wire passing groove; the wall surface of at least one wire passing groove includes a first wall surface 223, and the first wall surface 223 extends obliquely in the axial direction of the winding post 21 toward the direction close to the corresponding pin 220. The first wall surface 223 is one of the opposite side wall surfaces of the wire passing groove adjacent to the corresponding pin 220.

[0116] Specifically, the widths of the openings of three of the first wire grooves 221 gradually decrease in the direction towards their centers, while the widths of the openings of the remaining first wire grooves 221 remain unchanged. Three first wire grooves 221 are formed on the left side of the first side plate 22. The three first wire grooves 221 are spaced apart from each other in the left-right direction in sequence. The three first wire grooves 221 are arranged in one-to-one correspondence with the three pins 220. That is to say, the left first wire groove 221 is arranged corresponding to the left pin 220, and the left pin 220 is located on the left side of the left first wire groove 221; the middle first wire groove 221 is arranged corresponding to the middle pin 220, and the middle pin 220 is located on the right side of the middle first wire groove 221; the right first wire groove 221 is arranged corresponding to the right pin 220, and the right pin 220 is located on the right side of the right first wire groove 221. Then, at least part of the wire routing in the left first wire groove 221 is arranged along the left side wall of the left first wire groove 221. The left side wall of the left first wire groove 221 can extend obliquely upward in the direction towards the left pin 220. The right side wall of the left first wire groove 221 can extend vertically downward. At least part of the wire routing in the right first wire groove 221 is arranged along the right side wall of the right first wire groove 221. The right side wall of the right first wire groove 221 can extend obliquely downward in the direction towards the right pin 220. The left side wall of the right first wire groove 221 can extend vertically downward. At least part of the wire routing in the middle first wire groove 221 is arranged along the right side wall of the middle first wire groove 221, and both the left side wall and the right side wall of the middle first wire groove 221 extend vertically in the up-down direction.

[0117] Embodiment III

[0118] As Figures 11 - 12 shown, the structure of this embodiment is substantially the same as that of Embodiment I, where the same components use the same reference numerals. The difference lies in that: the winding column body 211 is substantially formed in a cylindrical structure; the number of the first wire grooves 212a is less than the number of the first wire grooves 221, and one of the first wire grooves 212a is arranged corresponding to two of the first wire grooves 221 at the same time.

[0119] Embodiment IV

[0120] As Figure 13 shown, the structure of this embodiment is substantially the same as that of Embodiment I, where the same components use the same reference numerals. The difference lies in that: the transformer 100 is a horizontal transformer.

[0121] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0122] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A transformer, characterized in that, Comprising: A winding, the winding comprising a primary winding and a secondary winding wound successively from the inside outwards, the secondary winding comprising a secondary coil, the secondary coil comprising at least one layer of sub-secondary coils; A transformer skeleton, the transformer skeleton comprising a winding column and a first side plate, the winding being wound around the winding column, the first side plate being provided at one axial end of the winding column, a plurality of pins being provided on the first side plate, a wire passing groove axially penetrating the first side plate along the winding column being formed at the edge of the first side plate, the wire passing groove comprising a first wire passing groove and a second wire passing groove, the primary winding having a plurality of winding ends, at least one winding end of the primary winding passing through the corresponding first wire passing groove and being connected to the corresponding pin, and the winding end of the secondary winding passing through the corresponding second wire passing groove and being connected to the corresponding pin; On the cross-section of the winding column, the projection of the contact portion between the edge of the first wire passing groove adjacent to the axial end of the winding column and the corresponding primary winding is located inside the projection of the cross-section center line of one layer of the sub-secondary coils adjacent to the central axis of the winding column; The cross-section of the winding column has a first direction and a second direction perpendicular to each other, the first wire passing groove being recessed along the first direction, and on the second direction, the edge of the first wire passing groove through which the winding end of the primary winding passes and adjacent to the axial end of the winding column is located between the two ends of the cross-section center line of the sub-secondary coils; The first wire passing grooves are multiple, and the multiple first wire passing grooves are arranged at intervals along the circumferential direction of the winding column; 2. The transformer according to claim 1, wherein, The first wire passing groove through which the winding end of the primary winding passes is recessed along the first direction until it is lower than the position where the innermost layer of the sub-secondary coils is located; 3. The transformer according to claim 1, characterized in that, The winding column comprises: A winding column body, the primary winding being wound around the winding column body; At least one baffle, the baffle being provided at the end of the winding column body, the baffle surrounding the winding column body and being arranged successively with the primary winding along the axial direction of the winding column, and on the cross-section of the winding column, the projection of the outer edge of the baffle is located outside the projection of the outer contour of the primary winding or is aligned with the projection of the outer contour of the primary winding; 4. The transformer according to claim 3, characterized in that, The baffle is one; The baffle is located at the axial end of the winding column body adjacent to the first side plate, and a plurality of wire routing grooves axially penetrating the baffle are formed at the edge of the baffle, and the plurality of wire routing grooves are correspondingly communicated with the plurality of first wire passing grooves; or, The baffle is located at the other axial end of the winding column body away from the first side plate, and a plurality of wire routing grooves axially penetrating the baffle are formed at the edge of the baffle.

5. The transformer according to claim 3, characterized in that, There are two baffles, namely a first baffle and a second baffle respectively. The first baffle is located at an axial end of the winding column body adjacent to the first side plate, and the second baffle is located at an axial end of the winding column body far from the first side plate. The primary side winding is located between the first baffle and the second baffle. Multiple wire routing grooves penetrating the baffle along the axial direction of the winding column are formed at the edge of the baffle. The wire routing grooves include multiple first wire routing grooves and multiple second wire routing grooves. The first wire routing grooves are formed on the first baffle, and the multiple first wire routing grooves are correspondingly communicated with the multiple first wire passing grooves. The second wire routing grooves are formed on the second baffle.

6. The transformer according to claim 4 or 5, characterized in that, In the axial direction of the winding column, the thickness of the baffle is a, and a satisfies: 0.2 mm ≤ a ≤ 3 mm. In the radial direction of the winding column, the width of the baffle is b, and b satisfies: 0.2 mm ≤ b ≤ 5 mm.

7. The transformer according to claim 6, characterized in that, The depth of the wire routing groove is c, and c satisfies: c ≥ b.

8. The transformer according to claim 7, wherein, The winding column body is of a hollow structure, and the wall thickness of the winding column body is t, and t satisfies: t ≥ 0.4 mm.

9. The transformer according to claim 3, characterized in that, An insulating member is provided between the primary side winding and the secondary side winding, and the insulating member wraps the primary side winding and the baffle.

10. The transformer according to claim 9, characterized in that, In the axial direction of the winding column, the length of the winding column is l1 and the length of the insulating member is l2, and l1 and l2 satisfy: 0.5 mm ≤ l2 - l1 ≤ 2 mm.

11. The transformer according to claim 3, characterized in that, The baffle includes a body portion and an extension portion. The body portion surrounds the winding column body, and the extension portion is provided at the outer edge of the body portion and protrudes radially outward from the outer edge of the body portion along the winding column.

12. The transformer according to claim 11, characterized in that, The baffle is provided with wire routing grooves, and the wire routing grooves are provided on or penetrate through the extension portion.

13. The transformer according to claim 1, characterized in that, A second side plate is provided at the other axial end of the winding column. At least one wire hanging portion is provided on the second side plate, and at least one wire hanging groove is formed on the wire hanging portion. One winding end of the primary side winding is wound in the wire hanging groove.

14. The transformer according to claim 13, wherein The interval between the wire hanging portion and an end of the second side plate adjacent to the center of the winding column is x, and x satisfies: 0.2 mm ≤ x ≤ 0.8 mm.

15. The transformer according to claim 13, wherein, The primary side winding includes a primary coil, a feedback coil and a shielding coil. The primary coil, the feedback coil and the shielding coil all have winding ends. The winding ends of the primary coil and the feedback coil are connected to the corresponding pins. One winding end of the shielding coil is connected to the corresponding pin, and the other winding end of the shielding coil is wound on the wire hanging portion.

16. The transformer according to claim 1, characterized in that, One side of the wire passing groove far from the central axis of the winding column is open to form an opening, and the width of the opening gradually decreases in the direction towards the center of the wire passing groove.

17. The transformer according to claim 1, characterized in that The wall surface of the wire passing groove includes a first wall surface. The first wall surface is one of the two opposite side wall surfaces of the wire passing groove adjacent to the corresponding pin. The first wall surface of at least one wire passing groove extends obliquely towards the direction close to the corresponding pin along the axial direction of the winding column.

18. A power supply, characterized in that, Comprising a transformer according to any one of claims 1-17.

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