CN201611605U

CN201611605U - Electronic transformer

Info

Publication number: CN201611605U
Application number: CN2009202600052U
Authority: CN
Inventors: 鞠万金
Original assignee: Individual
Current assignee: Shenzhen University
Priority date: 2009-10-27
Filing date: 2009-10-27
Publication date: 2010-10-20
Anticipated expiration: 2019-10-27

Abstract

The utility model discloses an electronic transformer, which comprises a framework, coils and a magnetic core group, wherein the framework takes the shape of the letter I; a through hole is formed in the center of the I-shaped framework; a ring-shaped groove is formed on the side edge of the framework and used for coiling the coils; symmetrical separation blades are arranged on the upper surface and the lower surface of the I-type framework; the magnetic core group comprises two magnetic cores which take shapes of domes to be buckled together; a space for accommodating the framework and the coils is formed between the magnetic cores; V-type cuts corresponding to the separation blades are formed on the magnetic cores and used for mutually positioning with the separation blades; and a column part matched with the through hole is also arranged in the center of the magnetic core. The electronic transformer provided by the utility model adopts the I-type framework, so that the volume of the transformer is decreased to realize the miniaturization of the electronic transformer; meanwhile, the dome shaped magnetic cores are provided with cylinders in the center and the openings of the magnetic cores are small, so that the leakage inductance of the transformer is small, and the magnetic loss of the transformer is reduced.

Description

A kind of electronic transformer

Technical field

The utility model relates to a kind of transformer, is specifically related to the improvement to the electronic transformer structure.

Background technology

Transformer is a kind of electronic building brick commonly used, is mainly used in the voltage on lifting or the reduction circuit.Traditional electronic transformer, shown in Figure 2 as Fig. 1, comprise skeleton 110, coil 120, magnetic core set 130 and pin 140.Skeleton 110 is generally cuboid, and its central authorities are provided with through hole 150.Magnetic core set 130 generally is made up of the multi-disc magnetic core, and inserts in the through hole 150.The lead-in wire of coil 120 can be electrically connected with circuit board after welding well with corresponding pin 140.

Magnetic core set of the prior art generally is the E font, and is shown in Figure 3 as Fig. 2, when magnetic core set 130 is inserted skeleton 110, is prone to the phenomenon of damaging magnetic core, reduced the yield of product.The pin 150 of transformer is generally two rows, is separately positioned on the both sides of skeleton 110 end faces.Because skeleton 110 end faces are generally rectangle, this makes the volume of transformer big, and when transformer and circuit board grafting, the area that makes it take circuit board is big, the unfavorable miniaturization of electronic products of using.Simultaneously, in the prior art, the opening of magnetic core set 130 is bigger, and this makes the leakage inductance of transformer big, and skin effect, proximity effect are serious, and magnetic core has problems such as local overheating, has shortened the useful life of transformer.

Thereby the structure of existing transformer is still waiting to improve and improve.

The utility model content

The purpose of this utility model is to provide a kind of electronic transformer, can also reduce the magnetic loss of transformer when reducing volume of transformer.

In order to achieve the above object, the utility model has been taked following technical scheme:

A kind of electronic transformer comprises skeleton, coil and magnetic core set, and wherein, described skeleton is I shape, and the I shape side central authorities of skeleton are provided with through hole; The periphery end face of the I shape of described skeleton is provided with an annular groove, is used for coiling; Be symmetrically arranged with catch on the side, I shape both sides of described skeleton, be used for magnetic core set is located; Described coil is at least two, and is fixed in the annular groove of described skeleton; Described magnetic core set comprises two magnetic cores, is the dome shape and snaps together, and formation one installs the space of described skeleton and coil between described magnetic core; Described magnetic core is provided with the otch of corresponding described catch, is used for locating mutually with described catch; Central authorities at described magnetic core also are provided with the post portion adaptive with described through hole.

Described electronic transformer, wherein, the I shape side of described skeleton is provided with a grafting piece, the pin of the transformer that is used to peg graft, the catch of described grafting piece and its place face is symmetrical arranged.

Described electronic transformer, wherein, described grafting piece is triangular in shape, and the periphery outside of the I shape of described skeleton is stretched out in the bottom of grafting piece.

Described electronic transformer, wherein, described pin is four, is used for being electrically connected with the elementary line group and the secondary wire set of coil.

Described electronic transformer, wherein, described catch is V-shape, and the openend of catch stretches out the periphery outside of the I shape of described skeleton.

Described electronic transformer, wherein, the side, I shape both sides of described skeleton is provided with the breach corresponding with described catch.

Described electronic transformer, wherein, the otch of described magnetic core comprises two, and is set to V-shape.

Described electronic transformer wherein, is provided with a circular hole at least on the described skeleton, be used to draw the lead-in wire of coil.

Described electronic transformer wherein, also comprises shell, is used for fixing described magnetic core set.

The electronic transformer that the utility model provides, owing to adopted the skeleton of I shape, reduced the volume of transformer, realized the electronic transformer microminiaturization, also adopted central authorities to be provided with the dome shape magnetic core of columnar portion simultaneously, the opening of magnetic core is little, make transformer leakage inductance little, reduce the magnetic loss of transformer, reduced the electromagnetic interference of transformer, increased the useful life of product.

Description of drawings

Fig. 1 is the skeleton structure schematic diagram of electronic transformer in the prior art;

Fig. 2 is the structural representation of electronic transformer in the prior art;

Fig. 3 is the structural representation of magnetic core set in the prior art;

The structural representation of the electronic transformer that Fig. 4 provides for the utility model;

Fig. 5 looks schematic diagram for the mansion of the electronic transformer skeleton that the utility model provides;

The bottom surface structural representation of the electronic transformer skeleton that Fig. 6 provides for the utility model;

The top surface structure schematic diagram of the electronic transformer skeleton that Fig. 7 provides for the utility model;

The structural representation of the electronic transformer finished product that Fig. 8 provides for the utility model.

Embodiment

For making the purpose of this utility model, technical scheme and effect clearer, clear and definite, below with reference to accompanying drawing and give an actual example the utility model is further described.

The electronic transformer that the utility model provides, as Fig. 4, Fig. 5, Fig. 6, shown in Figure 7, transformer comprises, skeleton 310, coil 320, magnetic core set 330 and pin 340.Described skeleton 310 is made by fire proofing, and skeleton is made as I shape.Be symmetrically arranged with catch 312 on the side, I shape both sides of described skeleton 310, described catch 312 is used for locating mutually with magnetic core set.Central authorities also are provided with through hole 311 in the I shape side of skeleton 310, and described through hole 311 can be set to circle.

In the present embodiment, the periphery end face of the I shape of skeleton 310 is provided with an annular groove 315, transformer is when production and processing, on described annular groove 315, twine earlier one deck insulating tape or insulating paper (indicating goes out among the figure) at least, by coil winding machine lead-in wire is wound in the described annular groove then, forms coil 320.Described coil 320 is at least two, and it comprises primary coil and secondary coil, also is provided with one deck insulating tape at least at the lateral surface of described coil 320.When transformer assembled, described insulating tape can prevent the coil breakage, improved the yield of product.

As shown in Figure 4, described magnetic core set 330 comprises two magnetic cores, and magnetic core 330 is the dome shape, and two magnetic cores can snap together, and forms a space that installs described skeleton 310 and coil 320 between two magnetic cores.Be provided with the otch 331 with described catch 312 symmetries on the end face of magnetic core 330, described otch 331 is used for locating mutually with described catch 312.In the preferred embodiment, each described magnetic core comprises two otch, and in the central authorities of described magnetic core the post portion 332 adaptive with described through hole 311 is set also, and post portion 332 can be set to cylinder, and inserts in the described through hole 311.When production and processing, can be at the contact-making surface of magnetic core and magnetic core, and be coated with a small amount of grey glue on the contact-making surface of magnetic core and coil, make the magnetic core bonding firmly.

In this enforcement, be I shape after the electronic transformer assembling is finished, as shown in Figure 8, the diameter of transformer is not more than 35MM, highly is not more than 11MM, so the volume of transformer is little, in light weight, has realized the electronic transformer microminiaturization.And the magnetic core set of transformer is that central authorities are provided with cylindrical dome shape magnetic core, and the opening of its magnetic core set is little, makes the magnetic resistance of transformer little, loss is low, leakage field is little, has also solved the local overheated problem of transformer simultaneously.

The electronic transformer that the utility model provides, as Fig. 5, Fig. 6, shown in Figure 7, in a preferred embodiment, the I shape side of skeleton 310 is provided with a grafting piece 313, and described grafting piece is triangular in shape.Described grafting piece 313 extends to the rich shape periphery direction of the circle of described skeleton from the external diameter edge of through hole and is provided with, and the top of grafting piece (being leg-of-mutton top) be arranged on the edge of described through hole, and the described skeleton outside is slightly stretched out in the bottom of grafting piece.

In a further embodiment, described grafting piece 313 is symmetrical arranged with the catch 312 of its place face, is used for and described magnetic core location.Should be noted that described grafting piece can also be set to other shape, as rectangle, trapezoidal etc.

For transformer is fixed on the circuit board, the pin 340 of transformer is made by the metal material that conducts electricity very well.One end of described pin 340 inserts in the described grafting piece 313, and the other end of pin stretches out the periphery outside of the I shape of described skeleton.The lead-in wire of transformer and secondary coil can be electrically connected the back with corresponding pin and circuit board is electrically connected.

In a preferred embodiment, transformer comprises 4 pins, and described pin 340 is arranged to a row, and the I shape parallel sided of pin and described skeleton is provided with.When transformer is electrically connected with circuit board, need transformer vertically is plugged on the circuit board, so just significantly reduced the wiring area of circuit board, help miniaturization of electronic products.And, only a grafting piece is set on the I shape side of skeleton, make the two sides of transformer asymmetric, when transformer is electrically connected with circuit board, also be convenient to staff's operation, reduced the defect rate of electronic product in process of manufacture.

In a further embodiment, as Fig. 5, Fig. 6, shown in Figure 7, described catch 312 is set to V-shape, and the openend of catch stretches out the periphery outside of the I shape of described skeleton.The otch 331 of described magnetic core also is set to the V-shape corresponding with described catch 312, so that magnetic core is installed in the outside of described catch.On the side, I shape both sides of skeleton 310, also be provided with the breach corresponding 314 with catch, described breach 314 is V-shape.When production and processing, the staff can confirm whether the dipping lacquer of transformer is qualified by otch, and the design of v-notch has simultaneously reduced the raw material of skeleton, can reduce the cost of product, but also can increase the overall appearance of skeleton.Certainly, in other embodiments, the breach of described catch, skeleton and the otch of magnetic core can also be provided with other shape.

In a further embodiment, on described skeleton, also be provided with a circular hole (not marking among the figure) at least, the lead-in wire of coil is drawn from circular hole, be electrically connected with the pin of transformer then.Certainly, the hole that is used to draw lead-in wire can also be other shape, such as: rectangle, triangle, perhaps other irregular switch.

In embodiment further, transformer also comprises shell 350, and as shown in Figure 4, described shell can be made as the dome type, is used for fixing the magnetic core of transformer.When producing assembling, can on the contact-making surface of shell and magnetic core, put some glue fixed housing and magnetic cores.

The electronic transformer that the utility model provides, whole adopt the I shape design, reduced the volume of transformer, simultaneously the pin of transformer is stretched out the design of periphery of the I shape of skeleton, and pin is made as a row, when transformer is electrically connected with circuit board, transformer is vertically inserted, so just significantly reduced the wiring area of circuit board, and the pin of transformer is few, plug-in unit is convenient, and the probability that occurs leakage weldering, rosin joint during welding is little, has improved the yield of electronic product.The utility model has also adopted the magnetic core of the little dome shape of opening, makes the magnetic resistance of transformer little, iron loss is low, also increased the useful life of transformer simultaneously.

Be understandable that; for those of ordinary skills; can be equal to replacement or change according to the technical solution of the utility model and utility model design thereof, and all these changes or replacement all should belong to the protection range of the appended claim of the utility model.

Claims

1. an electronic transformer comprises skeleton, coil and magnetic core set, it is characterized in that,

Described skeleton is I shape, and the I shape side central authorities of skeleton are provided with through hole; The side of described skeleton has an annular groove, is used for coiling; The upper and lower settings symmetry catch of described skeleton is used for magnetic core set is located;

Described coil is at least two, and is fixed in the annular groove of described skeleton;

Described magnetic core set comprises two magnetic cores, is the dome shape and snaps together, and formation one installs the space of described skeleton and coil between described magnetic core; Described magnetic core is provided with the otch of corresponding described catch, is used for locating mutually with described catch; Central authorities at described magnetic core also are provided with the post portion adaptive with described through hole.

2. electronic transformer according to claim 1 is characterized in that, is provided with a grafting piece above the I shape of described skeleton, the pin of the transformer that is used to peg graft, and the catch of described grafting piece and its place face is symmetrical arranged.

3. electronic transformer according to claim 2 is characterized in that, described grafting piece is triangular in shape, and the bottom of grafting piece stretch out described skeleton above.

4. electronic transformer according to claim 3 is characterized in that described pin is four, is used for being electrically connected with the elementary line group and the secondary wire set of coil.

5. electronic transformer according to claim 1 is characterized in that described catch is V-shape, and the openend of catch stretches out the top outside of described skeleton.

6. electronic transformer according to claim 5 is characterized in that, the I shape upper and lower surface of described skeleton is provided with the breach corresponding with described catch.

7. electronic transformer according to claim 5 is characterized in that the otch of each described magnetic core comprises two, and is set to V-shape.

8. electronic transformer according to claim 1 is characterized in that, is provided with a circular hole on the described skeleton at least, is used to draw the lead-in wire of coil.

9. electronic transformer according to claim 1 is characterized in that, also comprises shell, is used for fixing described magnetic core set.