CN209056362U - A kind of transformer of built-in layer stereo coil - Google Patents
A kind of transformer of built-in layer stereo coil Download PDFInfo
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- CN209056362U CN209056362U CN201821548809.8U CN201821548809U CN209056362U CN 209056362 U CN209056362 U CN 209056362U CN 201821548809 U CN201821548809 U CN 201821548809U CN 209056362 U CN209056362 U CN 209056362U
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Abstract
The utility model relates to transformer technology field, especially a kind of transformer of built-in layer stereo coil.It includes insulating substrate, first coil, the second coil, the first conductive sheet, the second conductive sheet and injection molded layers；First coil, the second coil, the first conductive sheet and the second conductive sheet are coated in injection molded layers.The utility model is attached respectively to the upper and lower surface of insulating substrate using first coil and the second coil, first conductive sheet and the second conductive sheet are set up in respectively on the outside of first coil and the second coil, insulating wrapped is carried out using injection molded layers, forms the transformer for being built-in with layer stereo loop construction；Insulating substrate curved surface can be planar structure or curved-surface structure; changing previous first coil and the second coil can only be formed on the outside of insulating substrate in a manner of planar coil, and producting process difficulty is small, and production cost is low; use scope is wide, is convenient for large-scale production and processing.
Description
Technical field
The utility model relates to transformer technology field, especially a kind of transformer of built-in layer stereo coil.
Background technique
With the continuous development of electronic technology, the lightening requirement of electric equipment products is being continuously improved, under such trend,
Also in the continuous improvement, wherein solid transformer is exactly an important development for requirement to miniaturization, the slimming of transformer
Direction.
Existing transformer is to accomplish to minimize and be thinned, and generallys use flat structure, is printed using multiple-level surface
There is the pcb board of conducting wire thin layer is stacked to form, to replace copper conductor winding.This method can make transformation to a certain extent
Device slimming, but there are still some drawbacks: such as, the conducting wire thin layer on pcb board can only be in planar structure, no legal system
It is made curved, i.e., shape can not be cooperated to be processed, difficulty of processing is big, at high cost, is unfavorable for large-scale production；For another example, PCB
The number of plies of the higher cost of plate, pcb board is more, and the production cost of transformer is higher；For another example, the welding difficulty of pcb board is big,
Insulation effect between each layer pcb board is poor, and insulating process difficulty is big etc..
Therefore, it is necessary to study a kind of new solid transformer structures, save space, improvement insulation mode, letter to reach
Change structure and reduces the effect of production cost.
Utility model content
In view of the deficiency of the prior art, the purpose of this utility model is to provide a kind of built-in layer stereo lines
The transformer of circle.
To achieve the goals above, the utility model adopts the following technical solution:
A kind of transformer of built-in layer stereo coil, it includes an insulating substrate, the upper surface for being attached to insulating substrate
On first coil, be attached on the lower surface of insulating substrate the second coil, be set up on the upside of insulating substrate and be located at first
The first conductive sheet above coil is set up in the second conductive sheet on the downside of insulating substrate and being located at below the second coil and at least
One layer of injection molded layers for being molded in insulating substrate peripheral side；The first coil, the second coil, the first conductive sheet and second
Conductive sheet is coated in injection molded layers；
The first coil and the second coil are spirally distributed, and the inner end of the first coil is the first connection
End, the outboard end of the first coil are the first leads ends；The inner end of second coil be second connection end, described second
The outboard end of coil is second pin end；First connecting pin is electrically connected after running through insulating substrate with second connection end；
First conductive sheet and the second conductive sheet are in the annular distribution of non-close, and one end of first conductive sheet is
Third connecting pin, the other end of first conductive sheet are third leads ends；One end of second conductive sheet is the 4th connection
End, the other end of second conductive sheet are the 4th leads ends；The third connecting pin is electrically connected with the 4th connecting pin.
Preferably, several first supporting blocks, each first support are provided on the upper surface of the insulating substrate
It is provided with the first positioning column on block, the first locating slot with the first positioning column to bit distribution is offered on first conductive sheet
Mouthful, first conductive sheet is connected in the first supporting block by the first positioning column；
It is provided with several the second supporting blocks on the lower surface of the insulating substrate, is all provided in each second supporting block
It is equipped with the second positioning column, the second locating notch with the second positioning column to bit distribution is offered on second conductive sheet, it is described
Second conductive sheet is connected in the second supporting block by the second positioning column.
Preferably, it further includes first connecing pin and second and connecing pin, first leads ends and the distribution of second pin end
On the outside of the profile of injection molded layers；Described first upper end for connecing pin is electrically connected with the first leads ends, first leads ends
Bending extends distribution outward again after lower end is bent downward；Described second connects the upper end of pin and second pin end is electrically connected
It connects, bending extends distribution outward again after the lower end at the second pin end is bent downward；
The outer end of the third leads ends bend downward after again bending outward extend to form third and connect pin, described the
Bending extends to form the 4th and connects pin outward again after the outer end of four leads ends is bent downward；
Bending extends to form third connecting pin outward again after the outer end of the third connecting pin is bent downward, and described the
Bending extends to form the 4th connecting pin outward again after the outer end of four connecting pins is bent downward；The third connecting pin and the 4th
Connecting pin electrical connection and the distribution that fits.
Preferably, it further includes the first conductive PIN needle and the second conductive PIN needle, first leads ends and second pin
End is distributed on the outside of the profile of injection molded layers, and the upper end of the described first conductive PIN needle successively extends vertically through insulating substrate and first
Leads ends distribution, and the upper end of the described first conductive PIN needle is electrically connected with the first leads ends, the described second conductive PIN needle
Upper end successively extends vertically through second pin end and insulating substrate distribution, and the upper end and second of the described second conductive PIN needle
Leads ends electrical connection；
The outer end of the third leads ends extends to form third and connects pin after bending downward, the 4th leads ends it is outer
End extends to form the 4th after bending downward and connects pin；
The outer end of the third connecting pin extends to form third connecting pin after bending downward, the 4th connecting pin it is outer
End extends to form the 4th connecting pin after bending downward, the third connecting pin and the 4th connecting pin fit distribution.
Preferably, it further includes upper magnetic core and lower magnetic core, the insulating substrate, first coil, the second coil, the first conduction
The centre of piece, the second conductive sheet and injection molded layers offers a perforation, is provided with and wears on the upper magnetic core and/or lower magnetic core
The bulge-structure of hole contraposition cooperation distribution, the upper magnetic core and the contraposition of lower magnetic core are sheathed on perforation and sentence progress clamping setting, institute
State the partial outer face of the coating and injection moulding layer of ring week after magnetic core and lower magnetic core clamping.
Preferably, the injection molded layers are at least two layers and successively injection molding from the inside to the outside, described each positioned at internal layer
The upper and lower surface of injection molded layers is attached with an ancillary coil, and the ancillary coil is spirally distributed and is coated on adjacent outer
On the inside of the injection molded layers of layer, end side is connecting pin in the ancillary coil and outboard end is leads ends, described to be distributed in same note
Mould the connecting pin electrical connection of two ancillary coils of layer upper and lower surface.
As the above scheme is adopted, the utility model is attached respectively to insulating substrate using first coil and the second coil
Two sides up and down, the first conductive sheet and the second conductive sheet are set up in respectively on the outside of first coil and the second coil, and are utilized
Injection molded layers carry out insulating wrapped to first coil, the second coil, the first conductive sheet and the second conductive sheet, ultimately form and are built-in with
The transformer of layer stereo loop construction；Two table up and down of insulating substrate is attached respectively to using first coil and the second coil
Face, insulating substrate, which is not limited to planar structure, to be curved-surface structure, change previous first coil as a result, and the second coil can only
Insulating substrate upper and lower surface is formed in a manner of planar coil, compared with the mode that PCB is stacked, use scope is wide, technique
Simply, production cost is low, greatly reduces the cost and the correspondingly welding processing cost between pcb board of production material；Together
Shi Liyong injection molded layers carry out insulating wrapped, and the processing method of this structure is simple and fast, do not need additional procedure of processing
It realizes between first coil and the first conductive sheet and the insulation between the second coil and the second conductive sheet, and improves whole exhausted
Edge performance.And the first conductive sheet and the second conductive sheet being made using materials such as copper or aluminium, are greatly improved conducting surface
Product, to achieve the purpose that High-current output or input.Simple and compact for structure based on this, producting process difficulty is small, production cost
It is low, it is applied widely, it is convenient for large-scale production and processing, there is very strong practical value and market popularization value.
Detailed description of the invention
Fig. 1 is the decomposition texture schematic diagram of the utility model first embodiment；
Fig. 2 is the side view of Fig. 1；
Fig. 3 is the cross section structure schematic diagram of Fig. 2；
Fig. 4 is the decomposition texture schematic diagram of the main part of the utility model first embodiment；
Fig. 5 is the structural schematic diagram of the utility model second embodiment；
Fig. 6 is the side view of the utility model second embodiment；
Fig. 7 is the cross section structure schematic diagram of Fig. 6；
Fig. 8 is the decomposition texture schematic diagram of the main part of the utility model second embodiment；
Fig. 9 is the structural schematic diagram of the utility model 3rd embodiment；
Figure 10 is the side view of the utility model 3rd embodiment；
Figure 11 is the cross section structure schematic diagram of Figure 10；
Figure 12 is the decomposition texture schematic diagram of the main part of the utility model 3rd embodiment；
Figure 13 is the structural schematic diagram of the utility model fourth embodiment；
Figure 14 is the cross section structure schematic diagram of the utility model fourth embodiment；
Figure 15 is the decomposition texture schematic diagram of the main part of the utility model fourth embodiment；
Figure 16 is the structural schematic diagram (one) of the preparation process of the transformer of the utility model；
Figure 17 is the structural schematic diagram (two) of the preparation process of the transformer of the utility model；
Figure 18 is the structural schematic diagram (three) of the preparation process of the transformer of the utility model；
Figure 19 is the structural schematic diagram (four) of the preparation process of the transformer of the utility model；
Figure 20 is the structural schematic diagram (five) of the preparation process of the transformer of the utility model；
Figure 21 is the structural schematic diagram (six) of the preparation process of the transformer of the utility model；
Figure 22 is the structural schematic diagram (seven) of the preparation process of the transformer of the utility model；
In figure: 10, insulating substrate；11, through-hole；12, the first supporting block；13, the first positioning column；14, the second supporting block；
15, the second positioning column；
20, first coil；21, the first connecting pin；22, the first leads ends；23, first pin is connect；24, the first conduction PIN
Needle；
30, the second coil；31, second connection end；32, second pin end；33, second pin is connect；34, the second conduction PIN
Needle；
40, the first conductive sheet；41, third connecting pin；42, third leads ends；43, the first locating notch；44, third, which connects, draws
Foot；45, third connecting pin；
50, the second conductive sheet；51, the 4th connecting pin；52, the 4th leads ends；53, the second locating notch；54, it the 4th connects and draws
Foot；55, the 4th connecting pin；
60, injection molded layers；61, the first ancillary coil；611, the first auxiliary connecting pin；612, the first auxiliary leads ends；62,
Two ancillary coils；621, the second auxiliary connecting pin；622, the second auxiliary leads ends；
71, upper magnetic core；72, lower magnetic core；A, bulge-structure；B, it perforates.
Specific embodiment
The embodiments of the present invention are described in detail below in conjunction with attached drawing, but the utility model can be by right
It is required that the multitude of different ways for limiting and covering is implemented.
As shown in Fig. 1 to Figure 22, a kind of transformer of built-in layer stereo coil provided by the embodiment of the utility model, it
Including an insulating substrate 10 (insulating substrate 10 can be made by thermoplastic, rubber or epoxy resin), it is attached to insulation
First coil 20 on the upper surface of substrate 10, is set up in absolutely the second coil 30 being attached on the lower surface of insulating substrate 10
(main part of first coil 20 is located at first to the first conductive sheet 40 on the upside of edge substrate 10 and positioned at 20 top of first coil
In the profile of conductive sheet 40), the second conductive sheet 50 for being set up in the downside of insulating substrate 10 and being located at 30 lower section of the second coil
It (main part of the second coil 30 is located in the profile of the second conductive sheet 50) and is molded in outside insulating substrate 10
The injection molded layers 60 of side；Wherein the first conductive sheet 40 and the second conductive sheet 50 can be made by materials such as copper and aluminium；First Line
The 20, second coil 30 of circle, the first conductive sheet 40 and the second conductive sheet 50 are coated in injection molded layers 60；20 He of first coil
Second coil 30 is spirally distributed, and the inner end of first coil 20 is the first connecting pin 21, the outboard end of first coil 20
For the first leads ends 22；The inner end of second coil 30 is second connection end 31, and the outboard end of the second coil 30 is second pin
End 32；First connecting pin 21 is electrically connected after running through insulating substrate 10 with second connection end 31 (preferably, can connect first
End 21 is connect to be set as on the top of second connection end 31, insulating substrate 10 and be located at the first connecting pin 21 and second connection end
A through-hole 11 is offered between 31, the first connecting pin 21 and second connection end 31 are electrically connected at through-hole 11)；First is conductive
Piece 40 and the second conductive sheet 50 are in the annular distribution of non-close, and one end of the first conductive sheet 40 is third connecting pin 41, and first
The other end of conductive sheet 40 is third leads ends 42；One end of second conductive sheet 50 is the 4th connecting pin 51, the second conductive sheet 50
The other end be the 4th leads ends 52；And third connecting pin 41 is electrically connected (preferably, can connect third with the 4th connecting pin 51
It connects end 41 and is set to 51 top of the 4th connecting pin, in order to which third connecting pin 41 and the 4th connecting pin 51 are electrically connected).
Based on the above structure setting, be electrically connected using the first connecting pin 21 with second connection end 31 make first coil 20 and
Primary side coil circuit, which is collectively formed, in second coil 30 (both can be used as input terminal wire loop, or output end coil
Circuit), to increase the coil turn of primary side coil, two as primary side of the first leads ends 22 and second pin end 32
External pin (both can be input pin, be also possible to output pin)；Third connecting pin 41 is electrically connected with the 4th connecting pin 51
Make the first conductive sheet 40 and the second conductive sheet 50 that secondary side coil circuit be collectively formed (secondary when primary side coil input terminal
Grade lateral coil is output end；When primary side coil is output end, secondary side coil is input terminal), third leads ends 42
Two external pins with the 4th leads ends 52 as primary side (are inputted when the first leads ends 22 and second pin end 32 are used as
When pin, third leads ends 42 and the 4th leads ends 52 are used as output pin；When the first leads ends 22 and second pin end 32 are made
When for output pin, third leads ends 42 and the 4th leads ends 52 are used as input pin), it is more to be eventually formed in setting in injection molded layers
The transformer of layer volume body coils structure；With using the principle of electromagnetic induction by the high voltage of input terminal and low current to output end
Low-voltage and high current are converted.During converting herein, it is attached respectively to using first coil 20 and the second coil 30
The two sides up and down of insulating substrate 10, insulating substrate 10, which is not limited to planar structure, (laser specifically can be used for curved-surface structure
The radium-shine straight forming technology of the technology or LDS of sintering makes first coil 20 and the second coil 30 on the insulating substrate 10), by
This, following table on insulating substrate 10 can only be formed in a manner of planar coil by changing previous first coil 20 and the second coil 30
Face, can according to the shape on 10 surface of insulating substrate, either plane or curved surface can straight forming, the mode being stacked with PCB
It compares, use scope is wide, simple process, and production cost is low；It simultaneously can also be by the thickness of control insulating substrate 10, to reduce
The distance between first coil 20 and the second coil 30, to achieve the purpose that reduce transformer height.Furthermore conductive by first
Piece 40 and the second conductive sheet 50 are set up in 30 outside of first coil 20 and the second coil respectively, fully enter the magnetic flux of primary side
In secondary side coil, to reduce magnetic leakage, the leakage inductance of transformer is reduced, and lead with first by controlling first coil 20
The distance between electric piece 40 and the distance between the second coil 30 and the second conductive sheet 50, further to reduce transformer
Highly.And it is replaced by insulating substrate 10 and the first coil being attached on insulating substrate 10 20 and the second coil 30
The winding of pcb board can substantially reduce the cost and the correspondingly welding processing cost between pcb board of production material；Benefit simultaneously
Insulating wrapped is carried out with injection molded layers 60, the processing method (i.e. the method for injection molding) of this structure is simple and fast, does not need volume
Outer procedure of processing, can be realized between first coil 20 and the first conductive sheet 40 and the second coil 30 and the second conductive sheet 50
Between insulation, and improve whole insulation performance；And 40 He of the first conductive sheet being made using materials such as copper or aluminium
Second conductive sheet 50 is used as primary side, the conductive area of primary side is greatly improved, to reach the mesh of High-current output or input
, it is applied widely especially suitable for low-voltage, High-current output or the situation of input, meet current power input, output
Development trend.Simple and compact for structure based on this, producting process difficulty is small, and production cost is low, and use scope is wide, is convenient for scale
Metaplasia produces and processing, has very strong practical value and market popularization value.
For the ease of the first conductive sheet 40 and the second conductive sheet 50 are set up in respectively on insulating substrate 10, as preferred side
Case is provided with several the first supporting blocks 12 on the upper surface of the insulating substrate 10 of the present embodiment, in each first supporting block 12
On be provided with the first positioning column 13, offered on the first conductive sheet 40 with the first positioning column 13 to the first of bit distribution the positioning
Notch 43, the first conductive sheet 40 are connected in the first supporting block 12 by the first positioning column 13；In the lower surface of insulating substrate 10
On be provided with several the second supporting blocks 14, the second positioning column 15 is provided in each second supporting block 14,
The second locating notch 53 with the second positioning column 15 to bit distribution is offered on two conductive sheets 50, the second conductive sheet 50 passes through second
Positioning column 15 is connected in the second supporting block 14.The height of change the first supporting block 12 and the second supporting block 14 can be passed through as a result,
Come realize between the distance between first coil 20 and the first conductive sheet 40 and the second coil 30 and the second conductive sheet 50 away from
From control；And determine by the cooperation of the first locating notch 43 and the first positioning column 13 and by the second positioning column 15 and second
Cooperation between the notch 53 of position, is conveniently set up in insulating substrate for the first conductive sheet 40 and the second conductive sheet 50 respectively
On 10, to improve the stability of apparatus structure, and reduces the difficulty of production technology and improve the speed of production and processing.
It is carried out to enable transformer to be welded on correspondingly circuit board in the form of surface mount device (SMD device)
It uses, preferably, the transformer of (as shown in Figures 1 to 4) the present embodiment further includes first connecing pin 23 and second and connecing
Pin 33, and the first leads ends 22 and second pin end 32 are distributed on the outside of the profile of injection molded layers 60；First connects the upper of pin 23
End is electrically connected with the first leads ends 22, and bending extends distribution outward again after the lower end of the first leads ends 22 is bent downward；
Second upper end for connecing pin 33 is electrically connected with second pin end 32, and the lower end at second pin end 32 is outside again after bending downward
Lateral bending folding extends distribution；Bending extends to form third and connects pin outward again after the outer end of third leads ends 42 is bent downward
44, bending extends to form the 4th and connects pin 54 outward again after the outer end of the 4th leads ends 52 is bent downward；Third connecting pin
Bending extends to form third connecting pin 45 outward again after 41 outer end is bent downward, and the outer end of the 4th connecting pin 51 is downward
Bending extends to form the 4th connecting pin 55 outward again after bending；Third connecting pin 45 and the 4th connecting pin 55 are electrically connected and are affixed
Close distribution.Based on the above structure, pin 23 and second is connect using first and connects pin 33 as input connector (i.e. primary flanks
Pin), pin 44 and the 4th, which is connect, using third connects pin 54 as output connector (i.e. secondary side pin)；Simultaneously to first
Connect pin 23, second connect pin 33, third connects pin 44 and the 4th connects after pin 54 is bent downward and bend outward again
Extension processing forms it into one kind and is similar to surface mount device (SMD device), so as to weld conveniently with surface mount
Used in the enterprising enforcement of correspondingly circuit board, in addition, using after the bending downward of third connecting pin 41 and the 4th connecting pin 51 again to
Outside bends extension processing, can cooperatively form similar to surface mount device (SMD device).
In order to enable transformer in the form of plug-in unit, it is welded in DIP encapsulation technology (dual-inline package technology)
The correspondingly enterprising enforcement of circuit board is used, and the transformer of (as shown in Fig. 5 to Figure 15) the present embodiment further includes the first conductive PIN needle 24
With the second conductive PIN needle 34, the first leads ends 22 and second pin end 32 are distributed on the outside of the profile of injection molded layers 60, and first is conductive
The upper end of PIN needle 24 successively extends vertically through insulating substrate 10 and the distribution of the first leads ends 22, and the first conductive PIN needle 24 is upper
End is electrically connected with the first leads ends 22, and the upper end of the second conductive PIN needle 34 successively extends vertically through second pin end 32 and absolutely
Edge substrate 10 is distributed, and the upper end of the second conductive PIN needle 34 is electrically connected with second pin end 32；Outside third leads ends 42
End extends to form third and connects pin 44 after bending downward, the outer end of the 4th leads ends 52 extends to form the 4th after bending downward
Connect pin 54；The outer end of third connecting pin 41 extends to form third connecting pin 45 after bending downward, the 4th connecting pin 51 it is outer
End extends to form the 4th connecting pin 55 after bending downward, third connecting pin 45 and the 4th connecting pin 55 fit distribution and welding
It is integrated.It is (i.e. first as input connector using the first conductive PIN needle 24 and the second conductive PIN needle 34 based on the above structure
Grade flanks pin), pin 44 and the 4th, which is connect, using third connects pin 54 as output connector (i.e. secondary side pin)；Simultaneously
Pin 44 is connect to third and the 4th connects pin 54 and bend downward extension processing, is led using the first conductive PIN needle 24, second
Electric PIN needle 34, third connect pin 44 and the 4th structure distribution for connecing pin 54 forms a kind of DIP plug-in unit, so as to convenient
The enterprising enforcement of correspondingly circuit board is welded in using DIP encapsulation technology (dual-inline package technology) to use.
Further, the transformer of the present embodiment further includes upper magnetic core 71 and lower magnetic core 72, insulating substrate 10, First Line
The centre for enclosing the 20, second coil 30, the first conductive sheet 40, the second conductive sheet 50 and injection molded layers 60 offers a perforation
D, wherein being provided with the bulge-structure a of perforation d contraposition cooperation distribution on upper magnetic core 71 and/or lower magnetic core 72；Upper magnetic core 71 is under
The contraposition of magnetic core 72 is sheathed at perforation d to carry out clamping setting, ring week coating and injection moulding layer after upper magnetic core 71 and lower 72 clamping of magnetic core
60 partial outer face.The structure setting of upper magnetic core 71 and lower magnetic core 72 as a result, makes transformer in upper magnetic core 71 and lower magnetic core 72
Middle formation transformer magnetic loop, and good magnetic screen is provided for transformer, inhibit radio frequency interference.Preferably, this reality
The combination of the upper magnetic core 71 and lower magnetic core 72 of example is applied using EE type core combination, EI type core combination, RM type core combination, PM
Type core combination, PQ type core combination, EC type core combination, ETD type core combination or other shapes of iron core.
Further, in order to realize the transformation effects of different transformers, preferably, (such as Figure 13-Figure 22) this reality
The injection molded layers 60 for applying example are at least two layers and successively injection molding from the inside to the outside, above and below each injection molded layers 60 positioned at internal layer
Surface is attached with an ancillary coil, and respectively the first ancillary coil 61 and the second ancillary coil 62 (utilize laser sintering technology
Or laser direct structuring technique is directly formed in the upper and lower surface of injection molded layers 60), the first ancillary coil 61 and the second auxiliary line
Circle 62 is spirally distributed and is coated on 60 inside of injection molded layers of adjacent outward layer, and end side is connecting pin in ancillary coil
And outboard end is leads ends, i.e. the interior end side of the first ancillary coil 61 is the first auxiliary connecting pin 611 and outboard end is first
Leads ends 612 are assisted, the interior end side of the second ancillary coil 62 is the second auxiliary connecting pin 621 and outboard end is that the second auxiliary is drawn
Foot 622；It is distributed in the connecting pin electrical connection of two ancillary coils of the upper and lower surface of same injection molded layers, i.e., the first auxiliary connection
End 611 and the second auxiliary connecting pin 621 are electrically connected.It, can be outside first coil 20 and the second coil 30 based on the above structure setting
Side is sequentially overlapped the multiple ancillary coils of setting, then in specific application, can make first coil 20 and the second coil as needed
30 are combined interconnection with multiple ancillary coils respectively, to improve the number of turns of primary side coil, realize the transformation of different transformers
Effect, i.e., it can be achieved that constructing the transformer effect of a large amount of different models on the basis of the coil of limited quantity construction.
In addition, the transformer based on a kind of above-mentioned built-in layer stereo coil, as shown in Figure 16 to Figure 22, this is practical new
Type embodiment also provides a kind of preparation method of transformer, and above-mentioned transformer is prepared in accordance with the following steps:
Step S1, injection molding insulating substrate 10；Being molded into for insulating substrate 10 is carried out in the mold of insulating substrate 10
Type (as shown in figure 16)；
Step S2, primary side coil production；Using laser sintering technology or laser direct structuring technique first in insulation base
The upper surface of plate 10 forms first coil 20, then overturns insulating substrate 10, forms the second coil in the lower surface of insulating substrate 10
30 (as shown in figure 17), in the forming process of the second coil 30, since through-hole 11 is filled by conductive material, can be made
One connecting pin 21 and second connection end 31 are electrically connected at through-hole 11, select laser sintering technology or laser direct forming
Technology is to consider that the surface external form of the easy coordinated insulation substrate 10 of both technologies is processed, such as by first coil 20 and second
Coil 30 is processed into round spiral, elliptical spiral shape etc.；
Step S3, secondary side coil production；First conductive sheet 40 (passing through the first positioning column 13) is set up in insulating substrate
Second conductive sheet 50 (passing through the second positioning column 15) is set up in the lower surface of insulating substrate 10 (such as Figure 18 institute by 10 upper surface
Show)；
The product for completing step S3 is put into the mold of injection molded layers 60 to complete by step S4, injection molding injection molded layers 60
To the insulating layer filling between first coil 20 and the first conductive sheet 40 and complete to first coil 20, the second coil 30, the
The insulating wrapped (as shown in figure 19) of one conductive sheet 40 and the second conductive sheet 50, to form injection molded layers 60；
The combination contraposition of upper magnetic core 71 and lower magnetic core 72 is set in outermost layer injection molded layers 60 by step S5, the installation of magnetic core
Outside, complete the production (as shown in figure 22) of transformer.
Based on above method, this method is using laser sintering technology or laser direct structuring technique directly in insulating substrate
10 molding primary side coils, change previous transformer can only carry out the superposition of coil in such a way that planar coil is superimposed, and swash
Light sintering technology or laser direct structuring technique can be not limited to the shape and surface smoothness of insulating substrate 10, i.e. insulating substrate
10 is changeable, can be planar structure and is also possible to curved-surface structure, can be according to the sharp processing first coil of insulating substrate 10
20 and second coil 30, space requirement is small, is easy to improve the number of turns of first coil 20 and the second coil 30；Simultaneously in the second line
Enclose 30 it is molding during, the connecting pin of first coil 20 and being electrically connected for the connecting pin of the second coil 30 can be realized, save
The step of welding procedure；Insulating wrapped is formed using the technique of injection molding, to make transformer form integral structure, no
Only stable structure, it is not easy to damage, and insulation effect is good, without extra technique and material, greatly reduce processing step
And production cost.Especially compared with the technique that pcb board is stacked, good combination property, producting process difficulty is small, production cost
Low, use scope is wide, is convenient for large-scale production and processing, has very strong practical value and market popularization value.
In order to realize the transformation effect of different transformers, preferably, also wrapped between the step S4 and step S5
Step S41 and step S42 are included,
Step S41, ancillary coil production, after step s4, utilizes laser sintering technology or laser direct forming skill
Art is separately formed an ancillary coil (i.e. the first ancillary coil 61 and the second ancillary coil 62) in the upper and lower surface of injection molded layers 60
(as shown in figure 20)；
The product for completing step S41 is put into correspondingly injection mold, inside by step S42, ancillary coil insulating wrapped
The outside of layer injection molded layers 60 is molded one layer of injection molded layers 60 again, to complete the insulating wrapped (as shown in figure 21) to ancillary coil.
Further, preferably, the step S41 and S42 may be repeated, to reach the injection molding of the specific number of plies
The ancillary coil of layer and the corresponding number of plies.
The multiple ancillary coils of setting can be sequentially overlapped on the outside of first coil 20 and the second coil 30 as a result, then having
Body in application, first coil 20 and the second coil 30 can be made to be combined interconnection with multiple ancillary coils respectively as needed, with
The number of turns for improving primary side coil realizes the transformation effect of different transformers, i.e., on the basis of the coil of limited quantity construction,
The transformer effect of a large amount of different models of construction can be achieved.
Preferably, the insulating substrate 10 in the step S1 of the present embodiment is using thermoplastic, rubber or epoxy
Any one material in resin carries out injection molding.
The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model,
Equivalent structure or equivalent flow shift made by using the description of the utility model and the drawings, is directly or indirectly transported
Used in other related technical areas, it is also included in the patent protection scope of the utility model.
Claims (6)
1. a kind of transformer of built-in layer stereo coil, it is characterised in that: it includes an insulating substrate, is attached to insulating substrate
Upper surface on first coil, be attached on the lower surface of insulating substrate the second coil, be set up on the upside of insulating substrate and
The first conductive sheet above first coil is set up in the second conductive sheet on the downside of insulating substrate and being located at below the second coil
And at least one layer of injection molded layers for being molded in insulating substrate peripheral side；The first coil, the second coil, the first conductive sheet
And second conductive sheet be coated in injection molded layers；
The first coil and the second coil are spirally distributed, and the inner end of the first coil is the first connecting pin, institute
The outboard end for stating first coil is the first leads ends；The inner end of second coil is second connection end, second coil
Outboard end be second pin end；First connecting pin is electrically connected after running through insulating substrate with second connection end；
First conductive sheet and the second conductive sheet are in the annular distribution of non-close, and one end of first conductive sheet is third
Connecting pin, the other end of first conductive sheet are third leads ends；One end of second conductive sheet is the 4th connecting pin, institute
The other end for stating the second conductive sheet is the 4th leads ends；The third connecting pin is electrically connected with the 4th connecting pin.
2. a kind of transformer of built-in layer stereo coil as described in claim 1, it is characterised in that: the insulating substrate
It is provided with several the first supporting blocks on upper surface, is provided with the first positioning column in each first supporting block, described
The first locating notch with the first positioning column to bit distribution is offered on one conductive sheet, first conductive sheet passes through the first positioning
Column is connected in the first supporting block；
It is provided with several the second supporting blocks on the lower surface of the insulating substrate, is provided in each second supporting block
Second positioning column, offers the second locating notch with the second positioning column to bit distribution on second conductive sheet, and described second
Conductive sheet is connected in the second supporting block by the second positioning column.
3. a kind of transformer of built-in layer stereo coil as described in claim 1, it is characterised in that: it further includes first connecing
Pin and second connects pin, and first leads ends and second pin end are distributed on the outside of the profile of injection molded layers；Described first connects
The upper end of pin is electrically connected with the first leads ends, and bending is prolonged outward again after the lower end of first leads ends is bent downward
Stretch distribution；Described second upper end for connecing pin is electrically connected with second pin end, and the lower end at the second pin end is turned under
Bending extends distribution outward again after folding；
Bending extends to form third and connects pin outward again after the outer end of the third leads ends is bent downward, and the described 4th draws
Bending extends to form the 4th and connects pin outward again after the outer end of foot is bent downward；
The outer end of the third connecting pin bends outward again after bending downward and extends to form third connecting pin, and the described 4th connects
Connect end outer end bend downward after again outward bending extend to form the 4th connecting pin；The third connecting pin and the 4th connection
Foot fits distribution.
4. a kind of transformer of built-in layer stereo coil as described in claim 1, it is characterised in that: it further includes first leading
Electric PIN needle and the second conductive PIN needle, first leads ends and second pin end are distributed on the outside of the profile of injection molded layers, described
The upper end of first conductive PIN needle successively extends vertically through insulating substrate and the distribution of the first leads ends, and the described first conductive PIN needle
Upper end be electrically connected with the first leads ends, the upper end of the second conductive PIN needle successively extend vertically through second pin end and
Insulating substrate distribution, and the upper end of the described second conductive PIN needle is electrically connected with second pin end；
The outer end of the third leads ends extends to form third and connects pin, the outer end of the 4th leads ends after bending downward
The 4th is extended to form after bending downward connects pin；
The outer end of the third connecting pin extends to form third connecting pin, the outer end of the 4th connecting pin after bending downward
The 4th connecting pin, the third connecting pin and the electrical connection of the 4th connecting pin and the distribution that fits are extended to form after bending downward.
5. a kind of transformer of built-in layer stereo coil as described in claim 1, it is characterised in that: it further includes upper magnetic core
With lower magnetic core, the insulating substrate, first coil, the second coil, the first conductive sheet, the second conductive sheet and injection molded layers center
Place offers a perforation, and the bulge-structure of perforation contraposition cooperation distribution is provided on the upper magnetic core and/or lower magnetic core, described
Upper magnetic core and the contraposition of lower magnetic core are sheathed on perforation and sentence progress clamping setting, coat in ring week after the upper magnetic core and lower magnetic core clamping
The partial outer face of injection molded layers.
6. a kind of transformer of built-in layer stereo coil as described in claim 1, it is characterised in that: the injection molded layers are extremely
The upper and lower surface of few two layers and successively injection molding from the inside to the outside, each injection molded layers positioned at internal layer is attached with an auxiliary
Coil, the ancillary coil is spirally distributed and is coated on the inside of the injection molded layers of adjacent outward layer, in the ancillary coil
End side is connecting pin and outboard end is leads ends, two ancillary coils of the upper and lower surface for being distributed in same injection molded layers
Connecting pin electrical connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821548809.8U CN209056362U (en) | 2018-09-20 | 2018-09-20 | A kind of transformer of built-in layer stereo coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821548809.8U CN209056362U (en) | 2018-09-20 | 2018-09-20 | A kind of transformer of built-in layer stereo coil |
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| CN209056362U true CN209056362U (en) | 2019-07-02 |
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| CN201821548809.8U Active CN209056362U (en) | 2018-09-20 | 2018-09-20 | A kind of transformer of built-in layer stereo coil |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109166710A (en) * | 2018-09-20 | 2019-01-08 | 东翔电子（东莞）有限公司 | A kind of transformer and preparation method thereof of built-in layer stereo coil |
| WO2022020801A1 (en) * | 2020-07-24 | 2022-01-27 | Texas Instruments Incorporated | Integrated magnetic assembly |
| TWI762126B (en) * | 2020-12-29 | 2022-04-21 | 群光電能科技股份有限公司 | Power converting module |
-
2018
- 2018-09-20 CN CN201821548809.8U patent/CN209056362U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109166710A (en) * | 2018-09-20 | 2019-01-08 | 东翔电子（东莞）有限公司 | A kind of transformer and preparation method thereof of built-in layer stereo coil |
| CN109166710B (en) * | 2018-09-20 | 2024-02-02 | 东翔电子（东莞）有限公司 | Transformer with built-in multilayer three-dimensional coil and preparation method thereof |
| WO2022020801A1 (en) * | 2020-07-24 | 2022-01-27 | Texas Instruments Incorporated | Integrated magnetic assembly |
| TWI762126B (en) * | 2020-12-29 | 2022-04-21 | 群光電能科技股份有限公司 | Power converting module |
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