Quick-release type combined transformer

Abstract

The utility model relates to the technical field of transformers, in particular to a quick-release combined transformer, which comprises a PCB (printed circuit board) with a coil winding inside, the PCB is used as a middle layer, and a first magnetic core and a second magnetic core are mounted on two sides of the PCB; the first magnetic core, the PCB and the second magnetic cores are combined and connected through spring buckles, and at least the middle structure of the first magnetic core can penetrate through the PCB and is combined and connected with the second magnetic core on the other side. The coil winding is arranged in the PCB of the middle layer, the first magnetic core and the second magnetic core are arranged on the two sides of the PCB, the first magnetic core penetrates through the PCB and is combined with the second magnetic core below in an abutting mode, and the spring buckles are arranged in a surrounding and fixing combined connection state and a flattening combined mode, so that the overall size is small, space is saved, and flattening of the transformer is achieved; miniaturization is realized; and rapid disassembly and assembly can be achieved through the spring buckles, the PCB and the magnetic core are convenient to replace, and the transformation ratios of transformers of different combinations are rapidly achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a quick-detachable combined transformer. Background Art

[0002] A transformer is a device that converts a certain value of AC voltage (current) into another or several different values ​​of voltage (current) with the same frequency. As electronic circuits develop towards high frequency, high reliability, and high integration, higher requirements are placed on DC power supplies. High switching frequency, modularization, flatness, and low loss are the development trends of DC power supplies. However, in the prior art, the three-dimensional transformer is difficult to achieve the development trend of low loss, high switching frequency, and flatness because its structure is not conducive to heat dissipation.

[0003] Usually, a transformer is a primary coil and a secondary coil with a certain ratio of turns encapsulated on a whole magnetic core, and then the magnetic core with the coils is encapsulated in a shell. If the transformation ratio of the transformer needs to be changed, it is necessary to disassemble the shell, replace the magnetic core or manually change the number of coil turns. The process is meticulous and cumbersome, the operation is inconvenient, and it is easy to destroy the stability of the coil.

[0004] Based on the problems in the prior art, the utility model provides a quick-detachable combined transformer. Utility Model Content

[0005] The utility model aims to provide a quick-detachable combined transformer to solve the technical problem that the integrated transformer with a three-dimensional structure in the prior art is difficult to meet the requirements of flattening and quickly replacing the magnetic core.

[0006] The technical solution of the utility model is: a quick-detachable combined transformer, comprising a PCB board, a pair of opposite surfaces of the PCB board are set as a positioning surface and a mounting surface, the PCB board is used as an intermediate layer, a first magnetic core is installed on one side of the mounting surface of the PCB board, and a second magnetic core is arranged on one side of the positioning surface of the PCB board; the first magnetic core, the PCB board and the second magnetic core are combined and connected by a spring buckle; wherein at least the middle part structure of the first magnetic core can penetrate the PCB board and be combined and connected with the second magnetic core on the other side.

[0007] Preferably, the spring clip is configured as a multi-segment structure, and the overall structure is a fully enclosed or semi-enclosed structure, and the enclosed internal space is used to accommodate the first magnetic core, the second magnetic core and the PCB board to maintain the combined connection state of the first magnetic core and the second magnetic core.

[0008] Preferably, the spring buckle includes a transition portion and a pair of connecting arms connected on both sides of the transition portion, and locking segments are respectively connected to the connecting arms on both sides. Adjacent segments are connected in sequence through a spring body, and the angle between adjacent segments can be changed by bending, and can be restored to its original shape under the action of the spring body.

[0009] Preferably, the spring buckle adopts a plate shell structure with an accommodating cavity inside, or the spring buckle adopts a multi-section clip strip combination structure.

[0010] Preferably, the first magnetic core adopts an E-shaped structure and forms three support seats at the bottom, and two adjacent channels are separated by the three support seats, and the middle support seat is inserted into the through hole on the PCB board, so that the bottom of the first magnetic core is matched and snapped on the PCB board, and the bottom end of the support seat abuts against the upper surface of the second magnetic core.

[0011] Preferably, the height of the support seat is not less than the thickness of the PCB board.

[0012] Preferably, the middle area of ​​the PCB board is used for stacking and matching the first magnetic core and the second magnetic core, and both ends of the PCB board extend outward and have a plurality of mounting holes reserved for inserting a multi-PIN pin header, and the pin header is used to fix the PCB board.

[0013] Preferably, the length of the pin row is not less than the sum of the thicknesses of the PCB board and the second magnetic core.

[0014] Compared with the prior art, the advantages of the utility model are:

[0015] The utility model arranges the coil winding in the PCB board of the middle layer, arranges the first magnetic core and the second magnetic core on both sides of the PCB board, the first magnetic core penetrates the PCB board and is abutted and combined with the second magnetic core below, and is surrounded and fixed in a combined connection state by a spring buckle. The flat combination mode has a small overall volume, saves space, and realizes the flattening and miniaturization of the transformer; and the spring buckle can be quickly disassembled and assembled, and the PCB board and the magnetic core are convenient to replace, and the transformer ratio of different combinations can be quickly realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0017] Figure 1 This is an exploded view of the quick-detachable combined transformer of the utility model;

[0018] Figure 2 It is an overall three-dimensional schematic diagram of the quick-detachable combined transformer of the utility model;

[0019] Figure 3This is a schematic diagram of the first magnetic core of the utility model being installed through the PCB board;

[0020] Figure 4 A schematic diagram of the combined connection of the first magnetic core and the second magnetic core of the utility model;

[0021] Figure 5 It is a cross-sectional view of the quick-detachable combined transformer of the utility model;

[0022] Wherein: 1. first magnetic core; 2. second magnetic core; 3. PCB board; 4. spring buckle; 5. pin header;

[0023] 11. buckle groove; 31. mounting surface; 32. positioning surface; 33. perforation; 34. mounting hole;

[0024] 41. Transition portion; 42. Connecting arm; 43. Locking section; 44. Spring body. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the present invention in conjunction with specific embodiments:

[0026] like Figure 1 As shown, a quick-detachable combined transformer includes a PCB board 3, magnetic cores are stacked on both sides of the PCB board 3, the middle area of ​​the PCB board 3 is used for stacking the magnetic cores, both ends of the PCB board 3 extend outward and are reserved with a plurality of mounting holes 34 for inserting multi-PIN headers 5, and the headers 5 are provided with multiple groups, which can not only play the role of electrical connection, but also the extra headers 5 can fix the PCB board 3, play a supporting role for the overall combined structure of the transformer, and improve the installation stability of the transformer.

[0027] A pair of opposite surfaces of the PCB board are set as the mounting surface 31 and the positioning surface 32. The top plastic shell end of the pin header is installed on the mounting surface 31, and the bottom needle tip is located below the positioning surface 32 to fix the PCB board with the laminated magnetic core on the device.

[0028] See attached Figure 2 , with the PCB board 3 as the middle layer, a first magnetic core 1 is installed on one side of the mounting surface 31 of the PCB board 3, and a second magnetic core 2 is arranged on one side of the positioning surface 32 of the PCB board 3; wherein the length of the pin row 5 is not less than the sum of the thicknesses of the PCB board 3 and the second magnetic core 2.

[0029] The bottom of the first magnetic core 1 extends along the thickness direction of the PCB board and penetrates the PCB board, and is combined and connected with the second magnetic core 2 on the other side. The first magnetic core 1 can be an e-shaped magnetic core or a pq-shaped magnetic core.

[0030] The following takes an E-shaped magnetic core as an example to explain in detail the combination of the upper and lower magnetic cores and the middle PCB board.

[0031] As attached Figure 3 Combined with Figure 4 As shown, the first magnetic core 1 adopts an E-shaped structure, and three support seats formed at the bottom of the E-shaped structure separate two adjacent channels. The middle support seat is inserted into the through hole 33 on the PCB board 3, so that the bottom of the first magnetic core 1 is matched and snapped on the PCB board 3, and the height of the support seat is not less than the thickness of the PCB board 3 to keep the bottom end of the support seat in contact with the upper surface of the second magnetic core 2.

[0032] After the first magnetic core 1 and the second magnetic core 2 are stacked on the PCB board, the first magnetic core 1 , the PCB board 3 and the second magnetic core 2 are assembled and connected by a spring buckle 4 .

[0033] The first magnetic core 1 and the second magnetic core 2 are made of manganese-zinc series ferrite cores, which have high magnetic permeability and good high-frequency characteristics.

[0034] The sizes of the first magnetic core 1 and the second magnetic core 2 affect the magnetic saturation and heat dissipation, and changing the winding in the middle PCB board changes the transformer ratio. Therefore, replacing different first magnetic cores and second magnetic cores changes the magnetic saturation of the transformer, and replacing PCB boards with different windings changes the transformer ratio.

[0035] Specifically, the spring clip 4 is configured as a multi-segment structure, and as a whole is a fully enclosed or semi-enclosed structure. The internal space enclosed by the spring clip 4 is used to accommodate the first magnetic core 1, the second magnetic core 2 and the PCB board to maintain the combined connection state of the first magnetic core 1 and the second magnetic core 2.

[0036] In detail, the spring clip 4 includes a transition portion 41 and a pair of connecting arms 42 connected to both sides of the transition portion 41, and locking sections 43 are respectively connected to the connecting arms 42 on both sides, and the locking sections 43 match the locking grooves 11 opened on the outer wall of the first magnetic core 1.

[0037] Adjacent segments are connected in sequence through a spring body 44. Bending the segments can change the angle state between the adjacent segments, thereby disassembling and replacing the first magnetic core 1 and the second magnetic core 2. The pulling force on the segments can be removed. Under the action of the spring body 44, the state between the adjacent segments can be automatically restored, the bending part can automatically reset to fit the first magnetic core 1 or the second magnetic core 2, and the locking segment 43 can automatically reset and snap into the buckle groove 11 to achieve quick disassembly and quick installation.

[0038] The spring buckle 4 may be a plate shell structure with an accommodating cavity inside, such as a C-shaped / U-shaped clip shell.

[0039] Or, the spring buckle 4 adopts a multi-segment clip combination structure, as shown in the attached Figure 5As shown in the figure, the clip at the transition portion 41 is clamped in the groove of the bottom outer wall of the second magnetic core 2, and the clip at the connecting arm 42 is bent and extended upwardly in contact with the second magnetic core 2 between the transition portion 41 at the bottom, so that the locking section 43 is buckled in the buckle groove 11 of the first magnetic core 1.

[0040] The utility model arranges the coil winding in the middle layer of the PCB board, arranges the first magnetic core and the second magnetic core on both sides of the PCB board, the first magnetic core penetrates the PCB board (penetrates the winding coil inside) and is abutted and combined with the second magnetic core below, and is fixed in a combined connection state by four circles of spring buckles, so that the magnetic cores and the PCB board on both sides can be quickly disassembled and replaced, the first magnetic core of different shapes can be replaced, the effective magnetic core area / volume passing through the PCB board can be changed, and the PCB board with different numbers of windings distributed inside can be replaced, so as to obtain different turns ratios or transformation ratios of the transformer.

[0041] The flat combination has a small overall volume, saves space, and realizes the flattening and miniaturization of the transformer. It can be quickly disassembled and assembled through spring buckles, which facilitates the replacement of PCB boards and magnetic cores, and quickly realizes different combinations of transformer ratios.

[0042] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.

Claims

1. A quick-disassembly combined transformer, characterized in that: A PCB board having a coil winding inside is provided, a pair of opposite surfaces of the PCB board are set as a positioning surface and a mounting surface, the PCB board is used as an intermediate layer, a first magnetic core is installed on one side of the mounting surface of the PCB board, and a second magnetic core is provided on one side of the positioning surface of the PCB board; the first magnetic core, the PCB board and the second magnetic core are connected by a spring buckle assembly; Among them, at least the middle part of the first magnetic core can penetrate the PCB board and be combined and connected with the second magnetic core on the other side; the middle area of ​​the PCB board is used for stacking and matching the first magnetic core and the second magnetic core, and the two ends of the PCB board extend outward and reserve a plurality of mounting holes for inserting a multi-PIN pin header, and the pin header is used to fix the PCB board; The spring buckle is configured as a multi-segment structure, and the overall structure is a fully enclosed or semi-enclosed structure, and the enclosed internal space is used to accommodate the first magnetic core, the second magnetic core and the PCB board to maintain the combined connection state of the first magnetic core and the second magnetic core; The spring buckle includes a transition portion and a pair of connecting arms connected on both sides of the transition portion, and locking segments are respectively connected to the connecting arms on both sides. Adjacent segments are connected in sequence through a spring body, and the angle between adjacent segments can be changed by bending, and can be restored to its original shape under the action of the spring body.

2. A quick-disassembly combined transformer according to claim 1, characterized in that: The spring buckle adopts a plate shell structure with an accommodating cavity inside, or the spring buckle adopts a multi-section clip strip combination structure.

3. The quick-disassembly combined transformer according to claim 1, characterized in that: The first magnetic core adopts an E-shaped structure and forms three support seats at the bottom. Two adjacent channels are separated by the three support seats. The middle support seat is inserted into the through hole on the PCB board, so that the bottom of the first magnetic core is correspondingly buckled on the PCB board, and the bottom end of the support seat is abutted against the upper surface of the second magnetic core.

4. A quick-disassembly combined transformer according to claim 3, characterized in that: The height of the support seat is not less than the thickness of the PCB board.

5. The quick-disassembly combined transformer according to claim 1, characterized in that: The length of the pin row is not less than the sum of the thickness of the PCB board and the second magnetic core.

Images