CN201345288Y

CN201345288Y - Super slim transformer and installing structure thereof

Info

Publication number: CN201345288Y
Application number: CNU200920129571XU
Authority: CN
Inventors: 李晓刚
Original assignee: Shenzhen Huntkey Electric Co Ltd
Current assignee: Shenzhen Huntkey Electric Co Ltd
Priority date: 2009-01-19
Filing date: 2009-01-19
Publication date: 2009-11-11
Anticipated expiration: 2019-01-19

Abstract

The utility model discloses a super slim transformer and an installing structure thereof and aims to solve the technical problem that a super slim transformer with small volume, high power-to-volume ratio, high temperature stability and low electromagnetic interference and an installing structure thereof are provided. In order to solve the technical problem, the utility model adopts the technical scheme that the super slim transformer and the installing structure thereof comprise a framework and a magnetic core arranged on the framework, wherein, the framework is installed on a PCB board, pins arranged on both sides of the framework adopt flat structures and the connecting ends of the pins are reversely folded upwards. Due to the adoption of the flat structures of the magnetic core and the framework, the volume and the height are small, and since the assembly method that the embedded fins folded down is adopted, the space heights of the upper and the lower surfaces of the circuit board can be fully utilized, and the ultrathin switching power supply is achieved; since the flat heat-radiating area of the magnetic core is large, the temperature rise is small and the bearing power is high under the same circuit condition; and the magnetic leakage is low and the electromagnetic interference is small.

Description

Ultra-thin transformer and mounting structure

Technical field

The utility model relates to a kind of switching mode power supply transformer and mounting structure, particularly a kind of ultra-thin transformer and mounting structure.

Background technology

Along with developing rapidly of electronic technology, Switching Power Supply is also more and more ripe, thereby has obtained extensive use, has been deep into fields such as electronics, communication, computer, household electrical appliance, this has greatly promoted developing rapidly of switch power technology, and people are also more and more stricter to the requirement of Switching Power Supply.Just at present, Switching Power Supply is just towards high performance-price ratio, miniaturization development, but the transformer that traditional bobbin and power magnetic core constitute, all adopt the mounting structure of DIP or SMT as EE, ER, PQ, POT, the isallobaric device of RM, therefore the solder joint height of electronic component under the composition=PCB of its product height+PCB thickness+transformer height causes product to have higher height; In addition, Switching Power Supply also has an important disadvantages, is exactly that it can bring bigger electromagnetic interference (EMI), has brought electronic pollution for surrounding environment and other electrical equipment, electrical network, when serious other electrical equipment can't be worked, this has limited the range of application of Switching Power Supply greatly.For this reason, formulate strict electromagnetic interference standard in the world, therefore, reduced electromagnetic interference and be the problem that also must consider when the Electronics Engineer designs Switching Power Supply.

Summary of the invention

The technical problems to be solved in the utility model is to provide that a kind of volume is little, the ultra-thin transformer and the mounting structure of high power volume ratio, high-temperature stability and low electromagnetic interference.

For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of ultra-thin transformer and mounting structure, comprise skeleton and the magnetic core that is arranged on the skeleton, described skeleton is installed on the pcb board, the pin that described skeleton both sides are provided with is a flat structure, and the link of the pin reflexed that makes progress.

Magnetic core described in the utility model is ER type magnetic core and I type magnetic core combining structure.

Be clipped between ER type magnetic core and the I type magnetic core behind the intact line of backbone winding described in the utility model.

Magnetic core described in the utility model is a flat structure.

Skeleton described in the utility model is installed on the pcb board with embedded structure.

The link of pin described in the utility model is fixed on the below of pcb board.

The utility model compared with prior art, adopted the magnetic core and the skeleton of flat structure, volume and highly little adds the assembly method of embedded pin reflexed, can make full use of the spatial altitude of circuit board upper and lower surfaces, thereby make Switching Power Supply really accomplish " ultra-thin "; And the flat area of dissipation of magnetic core is big, thereby under equal circuit condition, temperature rise is little, and the power that can carry is big; Leakage field is little, and electromagnetic interference is little.

Description of drawings

Fig. 1 is the structural representation of the utility model skeleton.

Fig. 2 is the schematic perspective view of the utility model magnetic core.

Fig. 3 is a scheme of installation of the present utility model.

Fig. 4 is the schematic diagram of prior art magnetic core.

Fig. 5 is first kind of scheme of installation of prior art.

Fig. 6 is second kind of scheme of installation of prior art.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

As Fig. 1, Fig. 2 and shown in Figure 3, the utility model ultra-thin transformer and mounting structure comprise skeleton 1 and the magnetic core that is arranged on the skeleton 1, skeleton 1 flat structure, and highly very low up and down, magnetic core also is a flat structure.The pin 2 that skeleton 1 both sides are provided be a flat structure, and the link of pin 2 reflexed that makes progress, and pin 2 employing special fixture surface mount are crossed the solder furnace crest and welded automatically.Magnetic core described in the utility model is ER type magnetic core 3 and I type magnetic core 3 ' combining structure, and skeleton 1 is clipped between ER type magnetic core 3 and the I type magnetic core 3 ' behind intact line.Skeleton 1 is installed on the pcb board 4, and its concrete mode is that skeleton 1 is installed on the pcb board 4 with embedded structure, and the link of pin 2 is fixed on the below of pcb board 4.

The ER that two ER type magnetic cores of magnetic core general of the present utility model prior art are as shown in Figure 4 changed system into as shown in Figure 2 adds I type magnetic core combining structure, be clipped between ER and the I magnetic core behind the intact line of backbone winding, like this, the height of magnetic core reduces greatly, also equal the height of transformer, realized " ultra-thin " of transformer; Because what magnetic core adopted is the very low high-quality material of high saturation magnetic flux density, loss, and the flat area of dissipation of magnetic core is big, thereby temperature rise is little a lot of under the equal circuit condition, and the power of carrying is also big a lot, has realized high power density and high-temperature characteristic; Because flat magnetic core has magnetic screening effect, is coupled, leakage field is low, thereby has realized low electromagnetic interference; In addition, magnetic core is flat to make that weight is very little, effectively reduces material cost.

When the utility model is installed, adopt to embed and install, the pin reflexed (common SMD transformer pin is downward bending) that makes progress, the embedded assembling of this pin reflexed can make the height of transformer regulate by easy on and off, can make full use of pcb board spatial altitude up and down, if the magnetic core of transformer size is made suitablely, the utilance that can accomplish spatial altitude under the pcb board upper plate fully is 100%, make power supply product thickness=transformer height, and magnetic core and skeleton can further be made according to the power supply size specially, make power supply product thickness=magnetic core thickness, really realized " ultra-thin ".And two kinds of mounting meanss that adopt at present usually such as Fig. 5, shown in Figure 6, first method: transformer does not adopt to embed and installs, all be positioned on the pcb board, for the product that element is also arranged under the pcb board, free space can't utilize under its plate, if do not consider shell, power supply product thickness=electronic component pin solder joint height+pcb board is thick+the transformer height, this method power supply thickness maximum; Second method: adopt to embed and install, the downward fold of pin, this method improves to some extent than first kind, and it is thick to have saved pcb board, but still can not utilize under the pcb board idle height, its product thickness=electronic component pin solder joint height+deduct thick transformer height of pcb board; And the power supply product thickness=transformer height of the utility model (as shown in Figure 3); This shows that the thickness of these two kinds of installation methods commonly used has all surpassed thickness of the present utility model.

It is little, in light weight to the utlity model has volume, and cost is low, temperature rise is little, efficient is high, electromagnetism is dried Disturbing the characteristics such as little, reliable and stable, elegant in appearance, is the desirable auxiliary products of flat ultra-thin switch power supply.

Claims

1. ultra-thin transformer and mounting structure comprise skeleton and are arranged on magnetic core on the skeleton that described skeleton is installed on the pcb board, it is characterized in that: the pin that described skeleton both sides are provided with is a flat structure, and the link of the pin reflexed that makes progress.

2. ultra-thin transformer according to claim 1 and mounting structure is characterized in that: described magnetic core is ER type magnetic core and I type magnetic core combining structure.

3. ultra-thin transformer according to claim 2 and mounting structure is characterized in that: be clipped between ER type magnetic core and the I type magnetic core behind the intact line of described backbone winding.

4. ultra-thin transformer according to claim 3 and mounting structure is characterized in that: described magnetic core is a flat structure.

5. according to claim 1 or 4 described ultra-thin transformer and mounting structures, it is characterized in that: described skeleton is installed on the pcb board with embedded structure.

6. ultra-thin transformer according to claim 5 and mounting structure is characterized in that: the link of described pin is fixed on the below of pcb board.