Planar transformer and electronic equipment

Abstract

The utility model relates to the technical field of transformers, and discloses a planar transformer and electronic equipment, the planar transformer comprises a base, a magnetic core structure, a winding structure and a pin assembly, the base is provided with a first side edge and a second side edge which are oppositely arranged along a first direction, the magnetic core structure is provided with a magnetic core cavity, and a magnetic core middle column is arranged in the magnetic core cavity; the winding structure is arranged on the peripheral side of the magnetic core middle column in a winding mode, the magnetic core cavity is provided with an air inlet and an air outlet in the second direction, and one part of the pin assembly is connected with the winding structure and corresponds to one of the air inlet and the air outlet. The airflow provided by the air supply piece on the mainboard in the second direction can sequentially flow through the air inlet and the magnetic core cavity and flow out of the air outlet, so that heat of the winding structure and the pin assembly is taken away, and overheating in the working process of the planar transformer is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of magnetic core, especially a kind of planar transformer and electronic equipment. BACKGROUND

[0002] With the progress of social industrial system, the demand of various electronic equipment is increasing in various trades, and planar transformer is widely used in various electronic equipment due to its light, small size, light weight and other advantages, for example, planar transformer is widely used in switching power supply.

[0003] However, due to the relatively small size of planar transformer, its power density is relatively high. In limited volume, higher power output is realized, especially under high load conditions, which inevitably generates more heat, so the planar heat sink has higher requirements for heat dissipation performance, and the existing planar heat sink is difficult to meet its heat dissipation demand. UTILITY MODEL CONTENT

[0004] The utility model embodiment aims at providing a kind of planar transformer and electronic equipment to solve the technical problems, such as low heat dissipation efficiency of planar transformer in prior art, difficult to meet its heat dissipation demand.

[0005] The utility model embodiment adopts the following technical scheme to solve the above technical problems: a planar transformer is provided, the planar transformer comprises:

[0006] A base, the base has oppositely arranged first side edge and second side edge along the first direction;

[0007] A magnetic core structure is installed on the side of the base away from the mainboard, the magnetic core structure has a magnetic core cavity, a magnetic core column is arranged in the magnetic core cavity, the magnetic core cavity has oppositely arranged air inlet and air outlet along the second direction, and the first direction is perpendicular to the second direction;

[0008] A winding structure is arranged on the outer circumferential side of the magnetic core column; and

[0009] A pin assembly, a part of the pin assembly is connected with the winding structure and corresponds to one of the air inlet or the air outlet.

[0010] In this embodiment, when the planar transformer is installed on the mainboard, the air outlet side of the air supply part on the mainboard can face the air inlet, and the air supply part on the mainboard can provide air flow in the second direction. In this way, the air flow provided by the air supply part in the second direction can flow through the air inlet, the magnetic core cavity and the air outlet in turn, thereby taking away the heat generated by the winding structure and the pin assembly, ensuring the heat dissipation performance of the winding structure and the pin assembly, and avoiding overheating of the planar transformer during operation.

[0011] In some embodiments, the pin assembly comprises a first pin and a second pin, one end of the first pin is connected to the winding structure and corresponds to one of the air inlets or air outlets, the other end of the first pin extends to the side of the first side away from the magnetic core structure, one end of the second pin is connected to the winding structure and corresponds to one of the air inlets or air outlets, the other end of the second pin extends to the side of the second side away from the magnetic core structure.

[0012] In some embodiments, the first pin comprises a first connecting segment, a first extending segment and a first inserting segment connected in sequence, the first connecting segment is arranged perpendicular to the winding structure and located at one end of the winding structure close to the air outlet, the first inserting segment is arranged perpendicular to the first side, and the two ends of the first extending segment are connected to the first connecting segment and the first inserting segment respectively.

[0013] The second pin comprises a second connecting segment, a second extending segment and a second inserting segment connected in sequence, the second connecting segment is arranged perpendicular to the winding structure and located at one end of the winding structure close to the air outlet, the second inserting segment is arranged perpendicular to the first side, and the two ends of the second extending segment are connected to the second connecting segment and the second inserting segment respectively.

[0014] In this embodiment, the first inserting segment is extended to the first side through the first extending segment, which facilitates the insertion and cooperation of the first inserting segment and the corresponding first pin insertion area; the second inserting segment is extended to the second side through the second extending segment, which facilitates the insertion and cooperation of the second inserting segment and the corresponding second pin insertion area. Moreover, the first connecting segment and the second connecting segment are arranged perpendicular to one end of the winding structure close to the air outlet, and during the process of airflow flowing into the magnetic core cavity from the air inlet and flowing out from the air outlet, the airflow will flow through the winding structure, the first connecting segment and the second connecting segment in sequence, thereby taking away the heat of the winding structure, the first pin and the second pin.

[0015] In some embodiments, the first extending segment and the second extending segment are respectively located on opposite sides of the base along the thickness direction thereof.

[0016] In this embodiment, by arranging the first extending segment and the second extending segment on opposite sides of the base along the thickness direction thereof, the mutual interference caused by the first extending segment and the second extending segment being located on the same side of the base can be avoided, thereby improving the heat dissipation performance and improving the structural compactness.

[0017] In some embodiments, a first insertion slot is arranged on the winding structure, and a second insertion slot is arranged on the base, the positions of the first insertion slot and the second insertion slot correspond to each other.

[0018] The first extension section is located on a side of the base away from the magnetic core structure, and the first connecting section sequentially passes through the first slot and the second slot and is connected to the first extension section.

[0019] In the embodiment, the first extension section is arranged on a side surface of the base away from the magnetic core structure, and the first connecting section sequentially passes through the first slot and the second slot to realize electrical connection with the first extension section by arranging the corresponding first slot and second slot on the winding structure and the base.

[0020] In some embodiments, a third slot is further arranged on the winding structure, and a fourth slot is further arranged on the second side edge.

[0021] The second extension section is located on a side of the base facing the magnetic core structure, the second connecting section is inserted into the third slot and connected to one end of the second extension section, and the second connecting section is inserted into the fourth slot and connected to the other end of the second extension section.

[0022] In the embodiment, the second extension section is arranged on a side surface of the base facing the magnetic core structure, and the second connecting section sequentially passes through the fourth slot to realize electrical connection with the second extension section by arranging the fourth slot on the second side edge.

[0023] In some embodiments, the first slot is a notch slot.

[0024] In the embodiment, the notch slot is arranged, which on the one hand increases the contact area of the airflow with the first connecting section, facilitating heat dissipation of the first connecting section of the first pin, and on the other hand facilitates installation of the first pin and improves assembly efficiency.

[0025] In some embodiments, the bottom of the base has a heat dissipation cavity, and the heat dissipation cavity has an air inlet and an air outlet arranged opposite to each other along the second direction.

[0026] In the embodiment, when the planar transformer is installed on the mainboard, there will be a gap between the base and the mainboard, so that part of the airflow provided by the air supply member in the first direction flows into the magnetic core cavity through the air inlet, and another part of the airflow flows into the heat dissipation cavity through the air inlet. The airflow flowing into the magnetic core cavity can flow to the winding structure, the first connecting section and the second connecting section and dissipate heat therefrom, and the airflow flowing into the heat dissipation cavity can flow to the second extension section and dissipate heat therefrom, thereby further improving the heat dissipation efficiency.

[0027] In some embodiments, the air inlet is a trapezoidal opening or an arc-shaped opening.

[0028] In the embodiment, the trapezoidal opening or the arc-shaped opening has the functions of gathering and guiding the air flow, so that more air flow can be gathered to flow into the magnetic core cavity, and the heat generated by the winding structure, the first pin and the second pin can be further taken away.

[0029] In some embodiments, the magnetic core structure comprises a bottom plate, a top plate, a first side column and a second side column, and the bottom plate, the top plate, the first side column and the second side column surround to form the magnetic core cavity.

[0030] The bottom plate and the top plate are respectively provided with notches on one side facing the air supply part to form the air inlet, or the bottom plate and the top plate are respectively provided with notches on one side facing the air supply part to form the air inlet.

[0031] Based on the same utility model concept, the utility model embodiment further provides an electronic equipment, comprising the planar transformer of any one of the above-mentioned embodiments, and

[0032] A mainboard is provided with an air supply part and a pin plug-in area, the pin plug-in area is arranged in a first direction, and the air supply part can supply air in a second direction; the planar transformer is mounted on the mainboard, and the pin assembly is electrically connected with the pin plug-in area.

[0033] In the embodiment, since the electronic equipment comprises the planar transformer of any one of the above-mentioned embodiments, the electronic equipment also has the beneficial effects of the above-mentioned embodiments, and the specific beneficial effects will not be repeated. BRIEF DESCRIPTION OF DRAWINGS

[0034] One or more embodiments are exemplarily illustrated by pictures in the drawings corresponding thereto, and the exemplarily illustrations do not constitute a limitation on the embodiments, and elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified, and the drawings do not constitute a proportional limitation.

[0035] Figure 1 is a plan view of the mainboard in the embodiment of the utility model;

[0036] Figure 2 is a three-dimensional structure schematic view of the planar transformer in the embodiment of the utility model;

[0037] Figure 3 is a plan view of the planar transformer in the embodiment of the utility model;

[0038] Figure 4 is a sectional structure schematic view of the planar transformer in the embodiment of the utility model;

[0039] Figure 5 is a three-dimensional structure schematic view of the planar transformer in another view of the embodiment of the utility model;

[0040] Figure 6 is the exploded structural schematic view of the planar transformer in the embodiment of the utility model;

[0041] Figure 7 is the three-dimensional structural schematic view of the base in the embodiment of the utility model.

[0042] Mark explanation:

[0043] 100, planar transformer;10, base;11, first side edge;12, second side edge;13, second slot;14, fourth slot;15, accommodating groove;16, heat dissipation cavity;160, air inlet;161, air outlet;17, support column;20, magnetic core structure;21, magnetic core cavity;210, magnetic core middle column;211, air inlet;212, air outlet;213, top plate;214, bottom plate;215, first edge column;216, second edge column;30, winding structure;31, first slot;32, third slot;33, PCB board;34, winding coil;40, first pin;41, first connecting section;42, first extension section;43, first plug-in section;50, second pin;51, second connecting section;52, second extension section;53, second plug-in section;60, third pin;200, mainboard;201, air supply part;202, first pin plug-in area;2020, first pin plug-in part;203, second pin plug-in area;2030, second pin plug-in part;2031, third pin plug-in part. Specific implementation

[0044] In order to facilitate understanding of the utility model, the utility model is described in more detail below in combination with the drawings and specific embodiments. It should be noted that when an element is described as being "connected" to another element, it can be directly on the other element or one or more intervening elements can be present therebetween. The terms "upper", "lower", "left", "right", "upper end", "lower end", "top" and "bottom" and the like used in the specification indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the utility model and simplifying the description, and therefore cannot be understood as limiting the device or element indicated or implied to have a particular orientation, to be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0045] Unless otherwise defined, all technical and scientific terms used in the specification have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model are only for the purpose of describing the specific embodiments and are not used to limit the utility model.

[0046] In the prior art, the mainboard for installing the planar transformer is usually provided with a heat dissipation fan and a plurality of pin insertion interfaces, and the positions of the heat dissipation fan and the plurality of pin insertion interfaces on the mainboard are usually fixed. Figure 1 Taking the viewing angle as an example, the heat dissipation fan can transport air flow from left to right, and the plurality of pin insertion interfaces are located on the right side of the heat dissipation fan and on the upper and lower sides of the mainboard.

[0047] The planar transformer mainly comprises a magnetic core structure and a winding module arranged in the inner cavity of the magnetic core structure, the magnetic core structure has a magnetic core middle column and a magnetic core side column, the winding module comprises a plurality of stacked PCBs and coil windings arranged on the PCBs, the PCBs are sleeved on the magnetic core middle column, the end portions of the PCBs extend to the outside of the magnetic core structure and are connected with pins, and the plurality of PCBs are electrically connected with the corresponding pin insertion interfaces on the mainboard in series through the pins, so that the planar transformer is installed on the mainboard.

[0048] When the planar transformer is installed on the mainboard, the air outlet side of the heat dissipation fan on the mainboard is opposite to the magnetic core side column of the planar transformer, so that the air flow provided by the heat dissipation fan cannot flow into the inner cavity of the magnetic core structure, thereby the heat dissipation fan cannot effectively dissipate heat of the winding module and the pins, the heat dissipation efficiency of the planar transformer is affected, and the heat dissipation efficiency of the planar transformer is poor.

[0049] In order to solve the technical problem of poor heat dissipation efficiency of the planar transformer in the prior art, the utility model embodiment provides a planar transformer, the pins of the planar transformer extend to the first side edge or the second side edge of the bottom of the base after penetrating through the winding structure at the air outlet, and are inserted and matched with the corresponding pin insertion part on the mainboard, so that the installation of the planar transformer on the mainboard is completed, when the planar transformer is installed on the mainboard, the air supply part on the mainboard can face the air inlet, so that under the action of the air supply part, the air flow can flow into the magnetic core cavity from the air inlet and flow out from the air outlet, in the process, the air flow flows through the winding structure and the pins, thereby taking away the heat of the winding structure and the pins. Further, the air inlet is a trapezoidal opening or an arc-shaped opening, the trapezoidal opening or the arc-shaped opening has the functions of gathering and guiding the air flow, so that more air flow can flow into the magnetic core cavity for heat exchange. In addition, after the planar transformer is installed on the mainboard, under the action of the air supply part, the air flow can also flow into the heat dissipation cavity from the air inlet and flow out from the air outlet, further taking away the heat of the pins at the bottom of the base. Through the above arrangement, the air supply part on the mainboard can be fully utilized to dissipate heat of the planar transformer, the heat dissipation efficiency of the planar transformer is improved, and the performance and service life of the planar transformer are not affected by overheating during use.

[0050] The utility model embodiment will be described in detail below with reference to the accompanying drawings. Figures 1 to 7 The planar transformer and the electronic equipment provided by the utility model embodiment will be described in detail.

[0051] Please refer to Figures 1 to 4 The utility model embodiment provides a planar transformer 100 can be assembled on the mainboard 200, the mainboard 200 is provided with the air supply piece 201 and the pin plug-in area, the pin plug-in area is along the first direction X and is set up, the air supply piece 201 can be along the second direction Y and air supply.

[0052] The planar transformer 100 includes a base 10, a magnetic core structure 20, a winding structure 30 and a pin assembly.

[0053] The base 10 has oppositely arranged first and second side edges 11 and 12 along the first direction X;

[0054] The magnetic core structure 20 is mounted on the side of the base 10 away from the mainboard 200, and the magnetic core structure 20 has a magnetic core cavity 21 with a magnetic core column 210 arranged therein. The magnetic core cavity 21 has an air inlet 211 and an air outlet 212 along the second direction Y, and the first direction X is perpendicular to the second direction Y.

[0055] The winding structure 30 is wound around the magnetic core column 210. Optionally, the winding structure 30 can be a printed circuit board winding (PCB winding), a multi-strand wire winding, or a Litz wire winding, etc.

[0056] Part of the pin assembly is connected to the winding structure 30 and corresponds to one of the air inlet 211 or the air outlet 212, and the pin assembly is electrically connected to the pin plug-in area.

[0057] After the planar transformer 100 is installed on the mainboard 200, the air inlet 211 can be directed towards the air outlet side of the air supply piece 201. The airflow provided by the air supply piece 201 in the second direction Y can flow through the air inlet 211, the magnetic core cavity 21, and out of the air outlet 212 in sequence, thereby carrying away the heat generated by the winding structure 30 and the pin assembly, ensuring the heat dissipation performance of the winding structure 30 and the pin assembly, and avoiding overheating during the operation of the planar transformer 100.

[0058] In some embodiments, as shown in Figure 1 The pin plug-in area includes a first pin plug-in region 202 and a second pin plug-in region 203 arranged on opposite sides of the air supply piece 201 along the first direction X. The air supply piece 201 can air supply along the second direction Y, so that the airflow blown by the air supply piece 201 can pass through the area between the first pin plug-in region 202 and the second pin plug-in region 203, and the first direction X is perpendicular to the second direction Y.

[0059] In some embodiments, the pin assembly includes a first pin 40 and a second pin 50, one end of the first pin 40 is connected to the winding structure 30 and is arranged corresponding to one of the air inlet 211 or the air outlet 212, the other end of the first pin 40 extends to the side of the first side 11 away from the magnetic core structure 20 and is electrically connected to the corresponding first pin insertion area 202, one end of the second pin 50 is connected to the winding structure 30 and is arranged corresponding to one of the air inlet 211 or the air outlet 212, the other end of the second pin 50 extends to the side of the second side 12 away from the magnetic core structure 20 and is electrically connected to the corresponding second pin insertion area 203.

[0060] As shown in Figure 1 , the main board 200 is provided with a blowing piece 201, which can be a cooling fan or a fan, etc., for providing air flow from left to right (corresponding to the second direction Y), the first pin insertion area 202 and the second pin insertion area 203 are located on the right side of the blowing piece 201, and the first pin insertion area 202 and the second pin insertion area 203 are located on opposite sides of the main board 200 along the first direction X, which facilitates the blowing piece 201 to cool the planar transformer 100. The first pin insertion area 202 is provided with a first pin insertion part 2020 which is inserted and matched with the first pin 40, and optionally, the first pin insertion part 2020 is an insertion port opened in the first pin insertion area 202. The second pin insertion area 203 is provided with a second pin insertion part 2030 which is inserted and matched with the second pin 50, and optionally, the second pin insertion part 2030 is an insertion port opened in the second pin insertion area 203. The first pin insertion part 2020 and the second pin insertion part 2030 can have one or more, for example, the first pin insertion part 2020 has two, and the first pin insertion part 2020 has one.

[0061] As shown in Figure 2 , Figure 3 and Figure 4 , the first pin 40 and the second pin 50 can both be secondary pins, through which the converted electrical energy can be outputted through the planar transformer 100, and the number of the first pin 40 and the second pin 50 can be one or more, for example, the first pin 40 is provided with two, and the second pin 50 is provided with one.

[0062] The base 10 has a first side edge 11 and a second side edge 12 opposite to each other in the first direction, the first side edge 11 corresponds to the position of the first pin insertion area 202, and the second side edge 12 corresponds to the position of the second pin insertion area 203, one end of the first pin 40 is connected to the winding structure 30, and the other end of the first pin 40 can extend to the first side edge 11 at the bottom of the base 10 to facilitate insertion and cooperation with the corresponding first pin insertion part 2020 on the mainboard 200, and one end of the second pin 50 is connected to the winding structure 30, and the other end of the second pin 50 can extend to the second side edge 12 at the bottom of the base 10 to facilitate insertion and cooperation with the corresponding second pin insertion part 2030 on the mainboard 200.

[0063] When installing the planar transformer 100, first move the planar transformer 100 above the mainboard 200, and align the first side edge 11 and the second side edge 12 with the positions of the first pin insertion area 202 and the second pin insertion area 203 respectively, and then insert the first pin 40 and the second pin 50 into the corresponding first pin insertion part 2020 and second pin insertion part 2030 respectively to realize the electrical connection between the first pin 40 and the second pin 50 and the mainboard 200.

[0064] When the planar transformer 100 is installed on the mainboard 200, the air outlet side of the air supply part 201 on the mainboard 200 faces the air inlet 211, and the air supply part 201 on the mainboard 200 can provide air flow in the second direction Y, so that the air flow provided by the air supply part 201 in the second direction Y can flow through the air inlet 211, the magnetic core cavity 21 and the air outlet 212 in turn, thereby taking away the heat generated by the winding structure 30 and the first pin 40 and the second pin 50, ensuring the heat dissipation performance of the winding structure 30 and the first pin 40 and the second pin 50, and avoiding overheating during the operation of the planar transformer 100.

[0065] Please refer to Figures 5 to 7 In some embodiments, the first pin 40 includes a first connection section 41, a first extension section 42 and a first insertion section 43 connected in sequence, the first connection section 41 is perpendicular to the winding structure 30 and located at one end of the winding structure 30 close to the air outlet 212, the first insertion section 43 is perpendicular to the first side edge 11 and is inserted and cooperated with the corresponding first pin insertion area 202, and the two ends of the first extension section 42 are connected with the first connection section 41 and the first insertion section 43 respectively; the second pin 50 includes a second connection section 51, a second extension section 52 and a second insertion section 53 connected in sequence, the second connection section 51 is perpendicular to the winding structure 30 and located at one end of the winding structure 30 close to the air outlet 212, the second insertion section 53 is perpendicular to the first side edge 11 and is inserted and cooperated with the corresponding second pin insertion area 203, and the two ends of the second extension section 52 are connected with the second connection section 51 and the second insertion section 53 respectively.

[0066] As shown in Figure 5 and Figure 6 The first connecting section 41 and the second connecting section 51 are respectively arranged vertically at one end of the winding structure 30 close to the air outlet 212. In the process of air flowing into the magnetic core cavity 21 from the air inlet 211 and flowing out from the air outlet 212, the air will flow through the winding structure 30, the first connecting section 41 and the second connecting section 51 in turn, thereby taking away the heat of the winding structure 30, the first lead 40 and the second lead 50.

[0067] The first lead 40 includes a first connecting section 41, a first extending section 42 and a first plug-in section 43 formed integrally. The first lead 40 can form the first connecting section 41, the first extending section 42 and the first plug-in section 43 by bending or the like. The first connecting section 41 is substantially perpendicular to the first extending section 42, and the first plug-in section 43 is substantially perpendicular to the first extending section 42.

[0068] The second lead 50 includes a second connecting section 51, a second extending section 52 and a second plug-in section 53 formed integrally. The second lead 50 can form the second connecting section 51, the second extending section 52 and the second plug-in section 53 by bending or the like. The second connecting section 51 is substantially perpendicular to the second extending section 52, and the second plug-in section 53 is substantially perpendicular to the second extending section 52.

[0069] The first plug-in section 43 can be extended to the first side edge 11 through the first extending section 42, so as to facilitate the plug-in cooperation of the first plug-in section 43 with the corresponding first lead plug-in part 2020 on the first lead plug-in area 202. The second plug-in section 53 can be extended to the second side edge 12 through the second extending section 52, so as to facilitate the plug-in cooperation of the second plug-in section 53 with the corresponding second lead plug-in part 2030 on the second lead plug-in area 203.

[0070] As shown in Figure 5 and Figure 6 In some embodiments, the first extending section 42 and the second extending section 52 are respectively located on opposite sides of the base 10 along the thickness direction thereof, that is, one of the first extending section 42 and the second extending section 52 is located on the top surface of the base 10, and the other is located on the bottom surface of the base 10. For example, the first extending section 42 is arranged on the side surface of the base 10 away from the magnetic core structure 20, and the second extending section 52 is arranged on the side surface of the base 10 facing the magnetic core structure 20.

[0071] By arranging the first extending section 42 and the second extending section 52 on opposite sides of the base 10 along the thickness direction thereof, the mutual interference caused by the first extending section 42 and the second extending section 52 being located on the same side of the base 10 can be avoided, thereby improving the heat dissipation performance and improving the structural compactness.

[0072] As shown in Figure 6 and Figure 7As shown, in some embodiments, the winding structure 30 is provided with a first slot 31, the base 10 is provided with a second slot 13, the first slot 31 corresponds to the position of the second slot 13; the first extension section 42 is located on the side of the base 10 away from the magnetic core structure 20, and the first connecting section 41 passes through the first slot 31 and the second slot 13 in sequence and is connected with the first extension section 42.

[0073] The winding structure 30 is provided with a first slot 31 along the thickness direction thereof, and the base 10 is provided with a second slot 13 along the thickness direction thereof, wherein the first slot 31 corresponds to and communicates with the position of the second slot 13.

[0074] In the embodiment, the first extension section 42 is arranged on the side surface of the base 10 away from the magnetic core structure 20, and the first connecting section 41 can pass through the first slot 31 and the second slot 13 in sequence to realize the electrical connection with the first extension section 42 by arranging the corresponding first slot 31 and second slot 13 on the winding structure 30 and the base 10 respectively.

[0075] In some embodiments, the winding structure 30 is further provided with a third slot 32, and the second side edge 12 is further provided with a fourth slot 14; the second extension section 52 is located on the side of the base 10 facing the magnetic core structure 20, the second connecting section 51 is inserted into the third slot 32 and connected with one end of the second extension section 52, and the second connecting section 53 is inserted into the fourth slot 14 and connected with the other end of the second extension section 52.

[0076] The winding structure 30 is provided with a third slot 32 along the thickness direction thereof, and the second side edge 12 is provided with a fourth slot 14 along the thickness direction of the base 10, wherein the third slot 32 and the fourth slot 14 correspond to the positions of the second connecting section 51 and the second connecting section 53 respectively.

[0077] In the embodiment, the second extension section 52 is arranged on the side surface of the base 10 facing the magnetic core structure 20, and the second connecting section 53 can pass through the fourth slot 14 to realize the electrical connection with the second extension section 52 by arranging the fourth slot 14 on the second side edge 12.

[0078] Optionally, the side surface of the base 10 facing the magnetic core structure 20 is further provided with a receiving groove 15, and the second extension section 52 is arranged in the receiving groove 15, so as to avoid the second extension section 52 protruding on the side surface of the base 10 facing the magnetic core structure 20, which is beneficial to reduce the thickness of the planar transformer 100 and improve the structural compactness.

[0079] In some embodiments, the first slot 31 is a notch slot, i.e., the side of the first slot 31 is notched to communicate with the outside. The shape of the notch slot is matched with the shape of the first connecting section 41. The notch slot is configured to increase the contact area between the airflow and the first connecting section 41, facilitating heat dissipation of the first connecting section 41 of the first pin 40, and facilitating installation of the first pin 40, improving assembly efficiency.

[0080] Optionally, the first pin 40 and the second pin 50 are substantially thin plate structures, which are beneficial to increase the contact area with the airflow and improve the heat dissipation efficiency.

[0081] In some embodiments, the winding structure 30 includes a plurality of PCB boards 33 and winding coils 34 disposed on the PCB boards 33. The PCB boards 33 are stacked and sleeved on the magnetic core column 210, and the first slot 31 and the third slot 32 are respectively formed in each PCB board 33. Under the action of the air supply member 201, the airflow flows between the PCB boards 33 in the second direction Y and carries away the heat generated by the PCB boards 33 and the winding coils 34.

[0082] In some embodiments, the winding coil 34 includes a secondary winding, and the secondary winding is electrically connected to the first pin 40 and the second pin 50 through the PCB board 33.

[0083] In some embodiments, the pin assembly further includes a third pin 60, which is vertically disposed on the side of the second side edge 12 facing the mainboard 200. The second pin insertion area 203 on the mainboard 200 is further provided with a third pin insertion part 2031 (see Figure 1 ), and the third pin 60 is inserted and matched with the third pin insertion part 2031.

[0084] The third pin 60 is a primary pin, and the winding coil 34 further includes a primary winding. The primary pin is electrically connected to the primary winding, and the primary pin is used to receive the electric energy provided by the mainboard 200.

[0085] As shown in Figure 4 and Figure 7 , in some embodiments, the bottom of the base 10 has a heat dissipation cavity 16. The heat dissipation cavity 16 has an air inlet 160 and an air outlet 161 arranged oppositely in the second direction Y. When the planar transformer 100 is installed on the mainboard 200, the air inlet 160 can face the air outlet side of the air supply member 201, and the airflow provided by the air supply member 201 in the first direction X can flow through the air inlet 160, the heat dissipation cavity 16 and the air outlet 161 in sequence.

[0086] Specifically, when the planar transformer 100 is installed on the mainboard 200, there is a gap between the base 10 and the mainboard 200. Thus, the air flow provided by the air supply member 201 in the first direction X, part of the air flow flows into the magnetic core cavity 21 through the air inlet 211, and the other part of the air flow flows into the heat dissipation cavity 16 through the air inlet 160. The air flow flowing into the magnetic core cavity 21 can flow to the winding structure 30, the first connecting section 41 and the second connecting section 51 and dissipate heat therefrom, and the air flow flowing into the heat dissipation cavity 16 can flow to the second extending section 52 and dissipate heat therefrom, thereby further improving the heat dissipation efficiency.

[0087] As shown in Figure 7 In some embodiments, the side of the base 10 facing the mainboard 200 is provided with a support column 17. The support column 17 can have a plurality of support columns 17 arranged on the first side edge 11 and the second side edge 12, respectively. When the planar transformer 100 is installed on the mainboard 200, the support column 17 can provide stable support for the planar transformer 100 to ensure the assembly stability of the planar transformer 100 on the mainboard 200.

[0088] In some embodiments, the air inlet 211 is a trapezoidal opening or an arc-shaped opening. The trapezoidal opening or the arc-shaped opening has a gathering and guiding effect on the air flow, so that more air flow can be gathered to flow into the magnetic core cavity 21, thereby further carrying away the heat generated by the winding structure 30, the first lead 40 and the second lead 50.

[0089] In some embodiments, the magnetic core structure 20 includes a bottom plate 214, a top plate 213, a first side column 215 and a second side column 216, and the bottom plate 214, the top plate 213, the first side column 215 and the second side column 216 surround the magnetic core cavity 21; the bottom plate 214 and the top plate 213 are respectively provided with notches on the side facing the air supply member 201 to form the air inlet 211; or the bottom plate 214 and the top plate 213 are respectively provided with notches on the side facing the air supply member 201 to form the air inlet 211.

[0090] The first side column 215 and the second side column 216 are respectively located on opposite sides of the bottom plate 214 along the first direction X, i.e. the first side column 215 is arranged corresponding to the first side edge 11, and the second side column 216 is arranged corresponding to the second side edge 12.

[0091] Specifically, the magnetic core structure 20 includes a first magnetic core and a second magnetic core. Optionally, the first magnetic core can be an E-shaped magnetic core, and the second magnetic core can be an I-shaped magnetic core, an E-shaped magnetic core, etc. The first magnetic core and the second magnetic core are arranged opposite to each other and cooperate to form the magnetic core structure 20.

[0092] The first magnetic core is E-shaped, and the second magnetic core is I-shaped.

[0093] The first magnetic core further comprises the magnetic core middle column 210, which is located between the first side column 215 and the second side column 216.

[0094] The electronic device comprises the planar transformer 100 and the mainboard 200.

[0095] The electronic device comprises the planar transformer 100, and thus has the beneficial effects of the planar transformer 100.

[0096] Optionally, the electronic device can be a switching power supply, a household appliance, a communication device, or the like.

[0097] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; under the idea of the utility model, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the utility model as described above; for the sake of simplicity, they are not provided in details; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced; and these modifications or replacements do not make the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A planar transformer, characterized by The planar transformer comprises: a base (10) having a first side edge (11) and a second side edge (12) oppositely arranged along a first direction; a magnetic core structure (20) mounted on a side of the base (10) away from a mainboard (200), the magnetic core structure (20) having a magnetic core cavity (21) with a magnetic core column (210) arranged therein, the magnetic core cavity (21) having an air inlet (211) and an air outlet (212) oppositely arranged along a second direction, the first direction being perpendicular to the second direction; a winding structure (30) wound around an outer circumferential side of the magnetic core column (210); and a pin assembly, a portion of the pin assembly being connected to the winding structure (30) and arranged corresponding to one of the air inlet (211) or the air outlet (212).

2. The planar transformer (100) according to claim 1, characterized in that The pin assembly comprises a first pin (40) and a second pin (50), one end of the first pin (40) being connected to the winding structure (30) and arranged corresponding to one of the air inlet (211) or the air outlet (212), the other end of the first pin (40) extending to a side of the first side edge (11) away from the magnetic core structure (20), one end of the second pin (50) being connected to the winding structure (30) and arranged corresponding to one of the air inlet (211) or the air outlet (212), the other end of the second pin (50) extending to a side of the second side edge (12) away from the magnetic core structure (20).

3. The planar transformer (100) according to claim 2, wherein the first pin (40) comprises a first connecting section (41), a first extending section (42) and a first inserting section (43) connected in sequence, the first connecting section (41) being arranged perpendicularly to the winding structure (30) and located at one end of the winding structure (30) close to the air outlet (212), the first inserting section (43) being arranged perpendicularly to the first side edge (11), and two ends of the first extending section (42) being connected to the first connecting section (41) and the first inserting section (43) respectively; the second pin (50) comprises a second connecting section (51), a second extending section (52) and a second inserting section (53) connected in sequence, the second connecting section (51) being arranged perpendicularly to the winding structure (30) and located at one end of the winding structure (30) close to the air outlet (212), the second inserting section (53) being arranged perpendicularly to the first side edge (11), and two ends of the second extending section (52) being connected to the second connecting section (51) and the second inserting section (53) respectively.

4. The planar transformer (100) according to claim 3, characterized in that the first extending section (42) and the second extending section (52) are located on opposite sides of the base (10) along a thickness direction thereof respectively.

5. The planar transformer (100) according to claim 4, characterized in that The winding structure (30) is provided with a first slot (31), and the base (10) is provided with a second slot (13); the first slot (31) corresponds to the position of the second slot (13); The first extension section (42) is located on the side of the base (10) away from the magnetic core structure (20), the first connection section (41) passes through the first slot (31) and the second slot (13) in sequence and is connected with the first extension section (42).

6. The planar transformer (100) according to claim 5, characterized in that The winding structure (30) is further provided with a third slot (32), and the second side (12) is further provided with a fourth slot (14); The second extension section (52) is located on the side of the base (10) facing the magnetic core structure (20), the second connection section (51) is inserted into the third slot (32) and connected with one end of the second extension section (52), and the second insertion section (53) is inserted into the fourth slot (14) and connected with the other end of the second extension section (52).

7. The planar transformer (100) according to claim 5, characterized in that The first slot (31) is a notch slot.

8. The planar transformer (100) according to claim 1, characterized in that The bottom of the base (10) is provided with a heat dissipation cavity (16), and the heat dissipation cavity (16) has an air inlet (160) and an air outlet (161) oppositely arranged along the second direction.

9. The planar transformer (100) according to any of claims 1-8, characterized in that The air inlet (211) is a trapezoidal opening or an arc-shaped opening.

10. The planar transformer (100) according to any one of claims 1 to 8, characterized in that The magnetic core structure (20) comprises a bottom plate (214), a top plate (213), a first side column (215) and a second side column (216), and the bottom plate (214), the top plate (213), the first side column (215) and the second side column (216) surround to form the magnetic core cavity (21); The bottom plate (214) and the top plate (213) are respectively provided with notches on the side facing the air supply part (201) to form the air inlet (211); or, the bottom plate (214) and the top plate (213) are respectively provided with notches on the side facing the air supply part (201) to form the air inlet (211).

11. An electronic device, comprising: The planar transformer (100) comprises the planar transformer (100) according to any one of claims 1-10; and A mainboard (200) is provided with an air supply part (201) and a pin insertion area, the pin insertion area is arranged along a first direction, and the air supply part (201) can supply air along a second direction; the planar transformer (100) is installed on the mainboard (200), and the pin assembly is electrically connected with the pin insertion area.

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