CN202905417U

CN202905417U - Transformer framework

Info

Publication number: CN202905417U
Application number: CN 201220618676
Authority: CN
Inventors: 刘昊
Original assignee: SHENZHEN AOHAI TECHNOLOGY Co Ltd
Current assignee: Dongguan Aohai Technology Co ltd
Priority date: 2012-11-21
Filing date: 2012-11-21
Publication date: 2013-04-24
Anticipated expiration: 2022-11-21

Abstract

The utility model discloses a transformer framework which is long in creepage distance and stable and reliable in assembly. The transformer framework comprises a top layer, a bottom layer, a winding groove, a magnetic core groove, pins and insulation retaining walls. The distance from a secondary pin to the inner side of a first insulation retaining wall is 4.5-7.5 millimeters, and the lower end of the first insulation retaining wall penetrates through a printed circuit board (PCB) and is fixedly connected with the PCB. According to the transformer framework, the lengthened first insulation retaining wall and balance enclosing walls are used for increasing the distance for the creepage distance, and therefore not only can the transformer framework be assembled on the PCB stably and reliably when used, but also a primary creepage distance and a secondary creepage distance are enabled to reach more than 8.0 millimeters. Compared with a primary safety distance and a secondary safety distance of an existing EE13 model framework, the primary creepage distance and the secondary creepage distance are increased greatly and meet the requirements of the national standard GB4943-2011 version. After the safety distance is increased, insulating gummed paper does not need to be wrapped on the outer surface of a magnetic core for increasing the creepage distance, and therefore a technological process is simplified, production efficiency is improved, and the reliability of transformer products is improved at the same time.

Description

Transformer framework

Technical field

The utility model relates to a kind of transformer framework, relates in particular to a kind of transformer framework that is applicable to low-power power adapter and charger.

Technical background

In the prior art, be applicable to the transformer framework of low-power power adapter and charger, the skeleton of EE13 model for example, it comprises top layer, bottom, winding slot between bottom and the top layer, vertically through the magnetic core groove between top layer and the bottom, stitch, and the fabric of EE13 model skeleton causes the primary and secondary safe distance too little, creepage distance only has 3mm, do not meet GB GB4943-2011(5 km height above sea level) requirement, this technical problem is not resolved for a long time, in order to increase the primary and secondary safe distance, when producing transformer with this skeleton, usually need secondaryly to walk fly line and increase creepage distance, complex process at the surperficial anti-package insulation gummed paper of magnetic core, poor reliability, efficient is low.

Summary of the invention

The technical problems to be solved in the utility model provides the transformer framework that a kind of creepage distance is large, assembling is reliable and stable.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is:

Transformer framework of the present utility model, comprise winding slot between top layer, bottom, top layer and the bottom, vertically through the magnetic core groove between top layer and the bottom, be arranged at the outer peripheral stitch in bottom both sides and be located at the bottom lower surface and be positioned at the insulation barricade of described magnetic core groove both sides, the first insulation stop from secondary stitch to the homonymy within the walls distance of side is 4.5-7.5mm; The lower end of described the first insulation barricade is passed pcb board and is fixedly connected with pcb board.

The periphery that encircles secondary stitch place bottom lower surface is provided with the balance enclosure wall of the downward protrusion that is connected with described the first insulation barricade of a side openings.

The distance that described balance enclosure wall protrudes from the bottom lower surface is 1.35mm.

The distance of side is 6.5mm within the walls from secondary stitch to the first insulation stop.

The distance that described the first insulation barricade protrudes from the bottom lower surface is 4.35mm.

The thickness of described the first insulation barricade is 1.2mm.

Compared with prior art, transformer framework of the present utility model adopts extended type the first insulation barricade, the balance enclosure wall strengthens the creepage distance of distance, not only make transformer framework of the present utility model in use, can be assemblied on the pcb board solid and reliablely, but also its primary and secondary creepage distance is reached more than the 8.0mm, primary and secondary safe distance than existing EE13 model skeleton increases greatly, meet GB GB4943-2011 version (5 km height above sea level) requirement, after safe distance increases, no longer need to increase creepage distance at magnetic core appearance bread insulating cement paper, simplify technical process, enhanced productivity, improved simultaneously the reliability of power transformer product.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1 is transformer framework stereogram of the present utility model.

Fig. 2 be among Fig. 1 A to view.

Fig. 3 be among Fig. 1 B to view.

Embodiment

Such as Fig. 1, shown in 2, it is transformer framework 10 of the present utility model, comprise top layer 1, bottom 2, winding slot 3 between top layer 1 and the bottom 2, vertically through the magnetic core groove 4 between top layer 1 and the bottom 2, be arranged at the outer peripheral stitch 5 in bottom 2 both sides, be elementary stitch 52 and secondary stitch 51, also comprise be located at bottom 2 lower surfaces respectively with primary and secondary stitch exist together a side and the opposed insulation barricade 6 that is positioned at described magnetic core groove 4 both sides, namely first the insulation barricade 61 and second the insulation barricade 62, wherein, elementary stitch 52 and the second insulation barricade 62 are positioned at a side, and secondary stitch 51 and the first insulation barricade 61 are positioned at opposite side.

Be 4.5-7.5mm from the distance of secondary stitch 51 to first insulation barricades 61 roots (i.e. the first insulation barricade 61 and secondary stitch 51 neighbours' part), be preferably 6.5mm;

The distance that the first insulation barricade 61 protrudes from the bottom lower surface is 4.35mm, its thickness is 1.2mm, during assembling, the lower end of the first insulation barricade 61 is passed pcb board (being circuit printing plate) and is fixed together with pcb board, thus, in the time of can making transformer framework of the present utility model be assemblied in the charger, more firmly firm.

The distance that the second insulation barricade 62 protrudes from the bottom lower surface is 1.35mm.

Shown in Fig. 1,3, the periphery that encircles secondary stitch 51 place bottoms 2 lower surfaces is provided with the balance enclosure wall 7 of a downward protrusion side openings and that be connected with the first insulation barricade 61, the distance that described balance enclosure wall 7 protrudes from the bottom lower surface is 1.35mm, the lower surface of the lower surface of this balance enclosure wall 7 and the second insulation barricade 62 is in a plane together, thereby make transformer framework of the present utility model in when assembling, can be reliable, better and the pcb board face is adaptive joins.

Transformer framework 10 of the present utility model, the primary and secondary creepage distance is along bottom 2 lower surfaces to the first insulation barricade 61 roots from secondary stitch 51, go further downwards to its bottom, again along its thickness inwardly to the distance of the first insulation barricade 61 inboards, be 6.5mm+4.35mm+1.2mm=12.05mm, 61 lower surfaces also have the 4.5mm distance if magnetic core is installed time to the first insulation barricade, then need add the distance of insulation barricade 61 lower surfaces, magnetic core lower end to the first, at this moment the primary and secondary creepage distance is 16.5mm, satisfies the requirement of GB GB4943-2011(5 km height above sea level far away) to the requirement of charger with transformer primary and secondary safety creepage distance.

Claims

1. transformer framework, comprise winding slot (3) between top layer (1), bottom (2), top layer (1) and the bottom (2), vertically through the magnetic core groove (4) between top layer (1) and the bottom (2), be arranged at the outer peripheral stitch in bottom (2) both sides (5) and be located at bottom (2) lower surface and be positioned at the insulation barricade (6) of described magnetic core groove (4) both sides, it is characterized in that: the inboard distance of the first insulation barricade (61) from secondary stitch (51) to homonymy is 4.5-7.5mm; The lower end of described the first insulation barricade (61) is passed pcb board and is fixedly connected with pcb board.

2. transformer framework according to claim 1 is characterized in that: the periphery that encircles secondary stitch (51) place bottom (2) lower surface is provided with the balance enclosure wall (7) of the downward protrusion that is connected with described the first insulation barricade of a side openings.

3. transformer framework according to claim 2, it is characterized in that: the distance that described balance enclosure wall (7) protrudes from the bottom lower surface is 1.35mm.

4. transformer framework according to claim 1 is characterized in that: be 6.5mm from secondary stitch (51) to the inboard distance of the first insulation barricade (61).

5. transformer framework according to claim 1 is characterized in that: the distance that described the first insulation barricade (61) protrudes from the bottom lower surface is 4.35mm.

6. transformer framework according to claim 5 is characterized in that: the thickness of described the first insulation barricade (61) is 1.2mm.