CN201904182U

CN201904182U - High-insulation transformer

Info

Publication number: CN201904182U
Application number: CN2010205744674U
Authority: CN
Inventors: 崔展明; 黄圣文
Original assignee: Aihuate (Guangzhou) Communication Co Ltd
Current assignee: Aihuate (Guangzhou) Communication Co Ltd
Priority date: 2010-10-22
Filing date: 2010-10-22
Publication date: 2011-07-20
Anticipated expiration: 2020-10-22

Abstract

The utility model relates to a high-insulation transformer which comprises a magnetic ring, a primary coil and a secondary coil, wherein the primary coil and the secondary coil are enwound on the magnetic ring; the magnetic ring, the primary coil and the secondary coil are arranged on a shell together; each end of the shell is provided with a bulge; lead-through thread ends of the primary coil and the secondary coil are enwound on the bulges at the two ends of the shell respectively; the quantity of the bulges is four; two bulges are arranged at the same end of the shell; the thread ends enwound at the two ends of the shell are used as pins, namely the thread ends can be directly welded on a PCB (printed circuit board) for use; and the quantity of the primary coil and the secondary coil is one respectively. The high-insulation transformer has the advantages of being high in welding reliability, lower in relative direct-current resistance, small in volume, less in production procedures, and simple for operation, meeting the international safety standard and saving the cost, and has good market application prospect.

Description

A kind of High-Isolation Transformer

Technical field

The utility model relates to a kind of transformer, is specifically related to a kind of High-Isolation Transformer.

Background technology

The packaged type of existing magnetic ring transformer on the market, adopt the mode of contact pin pin on traditional glue shell mostly, promptly respectively lead-in wire the end of a thread of primary coil, secondary coil is wrapped on the stitch of glue shell, through the high temperature wicking, the end of a thread that goes between is fixed on the stitch, insert again in the jack of pcb board and use, after stitch inserts pcb board, also need the junction is welded, this has just formed secondary welding, and the end of a thread that promptly goes between is connected with pcb board with stitch, stitch.Above-mentioned packaged type in long use, can occur unavoidably that the welding position is aging to come off, the phenomenon that stitch is loosening easily, and it is low that the magnetic ring transformer that is to say prior art has a soldering reliability, and D.C. resistance becomes big shortcoming relatively.

In addition, when the magnetic ring transformer of prior art was improved, the magnetic ring transformer after the improvement also must meet following international safety standard:

1, guaranteeing to have between primary coil, secondary coil and the magnet ring three beyond the basic insulation function, also needs supplementary insulation, when guaranteeing that basic insulation lost efficacy, prevent the generation of the situation of shocking by electricity;

2, satisfy the requirement of creepage gap, creepage gap is meant that minimum range is 2.0mm between two conductive parts or the shortest space length that records between conductive parts and the equipment protection interface;

3, satisfy the creepage distance requirement, creepage distance is meant between two conductive parts that record along insulating surface or the shortest path between conductive parts and the equipment protection interface, and minimum range is 2.5mm.

When having satisfied above-mentioned international safety standard, also require magnetic ring transformer miniaturization as much as possible, thereby make the PCB circuit board of application also reach the purpose of miniaturization.

The utility model content

In order to overcome the shortcoming of above-mentioned prior art, the utility model provides a kind of soldering reliability height, D.C. resistance is less relatively, production process is few, simple to operate, cost-effective magnetic ring transformer.

To achieve these goals, the technical solution adopted in the utility model is as follows: a kind of High-Isolation Transformer, comprise magnet ring, primary coil and secondary coil, described primary coil, secondary coil all are wound on the described magnet ring, wherein: described magnet ring, primary coil and secondary coil are installed on the housing jointly, the two ends of described housing are equipped with projection, lead-in wire the end of a thread of primary coil, secondary coil is wound on respectively on the projection at housing two ends, the end of a thread that is coiling is directly used on pcb board as pin.Distance between the center of circle of described magnet ring and secondary coil lead-in wire the end of a thread is less than the center of circle of magnet ring and the distance between primary coil lead-in wire the end of a thread, and described housing is the rectangle of hollow, also is provided with over cap on it.

The quantity of primary coil, secondary coil respectively is one, the quantity of the projection of described housing is four, and same end is provided with two projectioies, leaves suitable distance between two projectioies of same end, makes the specification of transformer satisfy the creepage gap and the creepage distance requirement of international safety standard; Secondary coil is an enamelled wire, is coated with insulating barrier on the primary coil, and the quantity of described insulating barrier is two, makes transformer satisfy the supplementary insulation requirement of international safety standard, can make transformer have the characteristics of high insulation.

The utility model compared with prior art has the following advantages:

1, is wound on the end of a thread on the projection at housing two ends, as pin, directly be connected, saved the operation of lead-in wire the end of a thread of coiling being carried out the high temperature wicking, production process is simplified with pcb board, even production operation becomes simple, also saved the production time, reduced cost of manufacture, but also reduced the risk of the secondary welding of prior art, has the soldering reliability height, the advantage that D.C. resistance is less relatively.

2, satisfying under the prerequisite of international safety standard, the position of magnet ring in housing is being set dexterously, making the volume of the magnetic ring transformer after the encapsulation reach minimized effect.

Description of drawings

Fig. 1 is the upward view of the utility model embodiment

Fig. 2 is the utility model embodiment primary coil insulating barrier schematic diagram

Fig. 3 is the vertical view of the utility model embodiment

Fig. 4 is the left view of the utility model embodiment

Embodiment

Shown in Fig. 1-4, a kind of High-Isolation Transformer comprises magnet ring 1, a primary coil 2 and a secondary coil 3.Primary coil 2, secondary coil 3 all are wound on the magnet ring 1.Described magnet ring 1; primary coil 2 and secondary coil 3 are installed on the housing 4 jointly; the two ends of described housing 4 are equipped with projection 12; described protruding 12 quantity be four and an end of housing 4 be set to two; described housing 4 is roughly the rectangle of hollow; also be provided with over cap 7 on the housing 4; so that when assembling; make things convenient for the absorption of SMT machine; two lead-in wire the end of a thread 5 of primary coil 2; two lead-in wire the end of a thread 6 of secondary coil 3 are wound on respectively on the projection 12 at housing 4 two ends; be that one of them of one of primary coil 2 lead-in wire the end of a thread 5 is as output; another is then as input; two lead-in wire the end of a thread 6 of secondary coil 3 are also like this; be that the magnetic ring transformer of present embodiment has four lead-in wire the end of a thread, and make and leave suitable distance between output and the input, promptly leave suitable distance between two of same end projectioies 12.As shown in Figure 2, also be coated with insulating barrier on the primary coil 2, the quantity of described insulating barrier is two, comprises underlying insulating layer 10 and supplemental dielectric layer 11, i.e. double hyer insulation layer, and secondary coil 3 is an enamelled wire.

Satisfying under the prerequisite of international safety standard, distance between the center of circle of described magnet ring 1 and secondary coil 3 lead-in wire the end of a thread 6 is less than the center of circle of magnet ring 1 and the distance between primary coil 2 lead-in wire the end of a thread 5, be that magnet ring 1 is relatively near the end of a thread 6, it is magnet ring 1 central axis 8, the limit at relatively close secondary coil 3 lead-in wire the end of a thread 6 places, and not overlapping with housing 4 central axis 9.

The using method of present embodiment is, the lead-in wire the end of a thread 5,6 that is wound on the projection 12 at housing 4 two ends can directly use as pin, be installed on the position of corresponding four pads that tin cream arranged of pcb board, after widely different stream technology welding tightens up, can use, very convenient.In order to protect the end of a thread, the tin layer of also can burn-oning at the end of a thread place to improve the intensity of the end of a thread, increases the service life.

Above-described embodiment, the utility model embodiment a kind of more preferably just, the common variation that those skilled in the art carry out in the utility model scheme scope and replacing all should be included in the protection range of the present utility model.

Claims

1. High-Isolation Transformer, comprise magnet ring, primary coil and secondary coil, described primary coil, secondary coil all are wound on the described magnet ring, it is characterized in that: described magnet ring, primary coil and secondary coil are installed on the housing jointly, the two ends of described housing are equipped with projection, and lead-in wire the end of a thread of primary coil, secondary coil is wound on respectively on the projection at housing two ends; Distance between the center of circle of described magnet ring and secondary coil lead-in wire the end of a thread is less than the center of circle of magnet ring and the distance between primary coil lead-in wire the end of a thread.

2. a kind of High-Isolation Transformer as claimed in claim 1 is characterized in that: the quantity of primary coil, secondary coil respectively is one.

3. a kind of High-Isolation Transformer as claimed in claim 1 is characterized in that: be coated with the rubber insulating barrier on the primary coil, the quantity of described insulating barrier is two, and secondary coil is an enamelled wire.

4. as each described a kind of High-Isolation Transformer of claim 1-3, it is characterized in that: the quantity of the projection of described housing is four, and the same end of housing is provided with two projectioies.

5. as each described a kind of High-Isolation Transformer of claim 1-3, it is characterized in that: described housing is the rectangle of hollow, also is provided with over cap on it.

6. a kind of High-Isolation Transformer as claimed in claim 4 is characterized in that: described housing is the rectangle of hollow, also is provided with over cap on it.