CN201820624U

CN201820624U - Printed circuit board type coreless transformer

Info

Publication number: CN201820624U
Application number: CN2010200025152U
Authority: CN
Inventors: 罗三国
Original assignee: Jebsee Electronics Co Ltd
Current assignee: Jebsee Electronics Co Ltd
Priority date: 2010-01-06
Filing date: 2010-01-06
Publication date: 2011-05-04
Anticipated expiration: 2020-01-06

Abstract

The utility model provides a novel structure of a transformer, particularly relates to a structural improvement of a miniaturized coreless transformer applicable to frequency modulation (FM) range, and is characterized in that a plurality of copper foil lines are respectively printed on the upper and the lower ends of a printed circuit board, the end edges of the copper foil lines at the upper and the lower ends correspond to each other, through holes are arranged for communicating the copper foil lines of the upper and the lower ends, the copper foil lines maintain the inductance within a proper range via a primary side arrangement and a secondary side arrangement, so better coupling efficiency can be provided, cost can be effectively reduced, iron core materials are not needed, and better practical and improvement efficacies are obtained.

Description

The no core transformer of printed circuit board

Technical field

The utility model is relevant for a kind of no core transformer of printed circuit board, and it is by being printed with many flat coppers tinsel cord respectively at the upper and lower layer of circuit board, and utilizes the perforation conducting, and preferable coupling efficiency is provided.

Background technology

Tradition is used for the transformer of FM low noise amplifier, and mainly as shown in Figure 1, the schematic diagram for general iron-core transformer 1 has an iron core 11, and the lower end is

primary side contact

111 and 112, coiling or first siding ring; The upper end is

secondary side contact

113 and 114, can be winding into second siding ring.Give birth to the theory of electricity according to Faraday's electric magnetisation, magnetic, general iron-core transformer 1, produce magnetic flux at first siding ring, also can induce voltage signal via ring-like unshakable in one's determination 11 at the second siding ring place, reach the effect of coupling, finish the purpose of use, right described traditional iron-core transformer 1 uses obviously possesses following shortcoming existence:

(1) traditional iron-core transformer 1 because of containing core material, so can raise the cost relatively, is not more had a market competitiveness.

(2) described traditional iron-core transformer 1 is made comparatively complicated inconvenience, increases the puzzlement in the assembling, influences production capacity.

(3) traditional iron-core transformer 1, form first siding ring by

primary side contact

111 and 112 coilings and produce magnetic flux, and the second siding rings that use

secondary side contact

113 and 114 coilings to form via ring-like iron core induce voltage signal, therefore easy inductance value and the coupling efficiency of influencing.

Summary of the invention

Main purpose of the present utility model is to provide a kind of transformer of printed circuit board, is meant that especially the miniaturization of a kind of FM of being applicable to frequency range (76MHz to 108MHz) do not have the structural improvement of core transformer.It is mainly combined by circuit board and upper and lower layer Copper Foil line and perforation.Described Copper Foil line is that primary side and secondary side are arranged, printing is distributed in the upper and lower layer of circuit board, and with the corresponding setting in the end limit of upper and lower layer of Copper Foil line, and offer perforation, utilize the Copper Foil line conducting of perforation with upper and lower layer, and the inductance value of described primary side and secondary side can remain on optimum state, and preferable coupling efficiency can be provided, not only can effectively reduce cost, and simplify and make flow process, more do not need any core material, it is desirable progressive to show traditional transformer.

In order to achieve the above object, the utility model provides a kind of no core transformer of printed circuit board, mainly formed by circuit board and Copper Foil line and perforation, the upper and lower end of described circuit board is printed with many upper copper tinsel cords, many lower floor's Copper Foil lines respectively, Copper Foil line end limit at upper and lower layer offers perforation respectively, and by perforation with described upper copper tinsel cord and the Copper Foil line conducting of described lower floor.

During enforcement, described upper copper tinsel cord, described lower floor Copper Foil line are straight line, camber line, curve or irregular line segment.

During enforcement, the upper and lower end of described circuit board is arranged by primary side and secondary side Copper Foil line, and the Copper Foil line end limit of described upper and lower end place is provided with for corresponding, and can make the Copper Foil line conducting of upper and lower layer by described perforation.

Compared with prior art, the no core transformer of printed circuit board described in the utility model, it is by being printed with many flat coppers tinsel cord respectively at the upper and lower layer of circuit board, and utilizes the perforation conducting, and preferable coupling efficiency is provided.

Description of drawings

Fig. 1 is the schematic diagram of existing iron-core transformer;

Fig. 2 is a schematic perspective view of the present utility model;

Fig. 3 is a upper copper tinsel cord front view of the present utility model;

Fig. 4 is a lower floor of the present utility model Copper Foil line front view;

Fig. 5 is the primary side and the secondary side contact schematic diagram of upper copper tinsel cord of the present utility model;

Fig. 6 is the primary side and the secondary side contact schematic diagram of lower floor of the present utility model Copper Foil line.

Description of reference numerals: iron-core transformer-1; Unshakable in one's determination-11; Primary side contact-111,112; Secondary side contact-13,114; Circuit board-2; Transformer-3; Upper copper tinsel cord-31; Lower floor's Copper Foil line-32; Perforation-33; Primary side contact-311,3110,321,3210; Secondary side contact-312,3120,322,3220; Contact-323,3230,313,314.

Embodiment

At first, see also shown in Figure 2ly, schematic perspective view of the present utility model mainly is made up of circuit board 2 and transformer 3.Described transformer 3 is at the upper and lower end of circuit board 2, be printed with many upper copper tinsel cords 31 and lower floor's Copper Foil line 32 respectively, and upper and lower layer

Copper Foil line

31,32 corresponding settings, and the place, end limit at upper and lower layer

Copper Foil line

31,32 offers perforation 33, and can be with 31,32 conductings of upper and lower layer Copper Foil line, form the transformer 3 of a centreless, and can obtain stable inductance value, and preferable coupling efficiency can be provided.

Secondly, please then consult shown in Figure 3, the front view of the utility model upper copper tinsel cord 31, but be positioned at upper copper tinsel cord 31 design models of circuit board 2,, please continue to consult shown in Figure 4 as for lower floor's cabling 32, the front view of the utility model lower floor Copper Foil line 32, described lower floor Copper Foil line 32 cooperates the position correspondence of upper copper tinsel cord 31 to set up, and with the linear fashion setting, and utilize perforation 33 with upper copper tinsel cord 31 and lower floor's Copper Foil line 32 conductings.And in order to arrange primary side and secondary side Copper Foil line in very low range, described upper copper tinsel cord 31 can be made as moulding such as camber line, folding line, and main perforation 33 for the end limit can be with upper and lower

Copper Foil line

31,32 conductings.

As for described upper and lower layer

Copper Foil line

31,32 formed primary sides, second siding ring, please cooperate and consult Fig. 5, shown in Figure 6, the top of described upper copper tinsel cord 31 (shown in Figure 5) is provided with primary side contact 311 and secondary side contact 312, and the lower end then is provided with another primary side contact 3110 and secondary side contact 3120.On the top of lower floor's Copper Foil line 32 (shown in Figure 6) primary side contact 321 and secondary side contact 322 are set also in addition, lower end then is provided with another primary side contact 3210 and secondary side contact 3220.

During use, please still cooperate and consult Fig. 5, shown in Figure 6, described second siding ring forms the secondary side contact 312 by upper copper tinsel cord 31 tops, extend to bottom secondary side contact 314, pass through the contact 323 of perforation 33 conductings to lower floor's Copper Foil line 32 then, and extend to contact 3230, the contact 313 of conducting to upper strata Copper Foil line 31 then makes progress, extend to the secondary side contact 3120 of lower end again, keep normal stable inductance value.And the formation of first siding ring, with primary side contact 311 beginnings of secondary side by upper copper tinsel cord 31, after connecting many flat

coppers tinsel cord

31,32 of upper and lower layer, be communicated to the primary side contact 3110 of upper copper tinsel cord 31 lower ends, reach normal, stable inductance value equally.

Therefore, the utility model changes the structure of traditional iron-core transformer fully, and is simplified to the small-sized no core transformer of printed circuit board, and production process is simplified in decapacitation, reduces manufacturing cost, is more convenient for assembling.And the transformer 3 of described printed circuit board, the inductance value of its primary side and secondary side is comparatively stable, not only practicality is good and the tool progressive so preferable coupling efficiency can be provided.

In sum, the utility model is by the centreless design of transformer of printing electroplax formula, utilization is arranged the Copper Foil line at the upper and lower layer of circuit board according to primary side and secondary side, cooperate the perforation conducting, simplify the structure of transformer, and can raise the efficiency, more can effectively reduce cost, showing has been good than the conventional iron core type transformer, when meeting novel patent requirement, proposes patent application in accordance with the law.

More than explanation is just illustrative for the utility model; and it is nonrestrictive; those of ordinary skills understand; under the situation of the spirit and scope that do not break away from claims and limited; can make many modifications, variation or equivalence, but all will fall in the protection range of the present utility model.

Claims

1. the no core transformer of a printed circuit board, mainly formed by circuit board and Copper Foil line and perforation, it is characterized in that: the upper and lower end of described circuit board is printed with many upper copper tinsel cords, many lower floor's Copper Foil lines respectively, Copper Foil line end limit at upper and lower layer offers perforation respectively, and by perforation with described upper copper tinsel cord and the Copper Foil line conducting of described lower floor.

2. the no core transformer of printed circuit board as claimed in claim 1 is characterized in that, described upper copper tinsel cord, described lower floor Copper Foil line are straight line, camber line, curve or irregular line segment.

3. the no core transformer of printed circuit board as claimed in claim 1, it is characterized in that, the upper and lower end of described circuit board is arranged by primary side and secondary side Copper Foil line, and place, the Copper Foil line end limit of described upper and lower end is provided with for corresponding, and can make the Copper Foil line conducting of upper and lower layer by described perforation.