CN100435246C

CN100435246C - Switch transformer

Info

Publication number: CN100435246C
Application number: CNB2004100586391A
Authority: CN
Inventors: 渡边修; 佐伯英人
Original assignee: Tamura Corp
Current assignee: Tamura Corp
Priority date: 2003-07-24
Filing date: 2004-07-26
Publication date: 2008-11-19
Anticipated expiration: 2024-07-26
Also published as: KR20050012173A; KR100658856B1; JP2005045093A; CN1577653A

Abstract

Provided is a switching transformer capable of reducing the number of parts and the number of assembly processes, and of being made small in size and low in its height. There are provided a transformer body 1, 1A where a coil 4 is wound on a coil bobbin 2 and a pin terminal 8 is implanted, a case side core 9, 9A, 9B where a transformer body storing part 13, 13A for storing the transformer body 1, 1A is formed, and an upper side core 14, 14A mounted on an upper part of the case side core 9, 9A, 9B for covering an upper part of the transformer body 1, 1A. A sealed case and a storage case disposed outside the transformer body are omitted, and the cores are instead used as the sealed case and the storage case.

Description

Switch transformer

Technical field

The present invention relates to a kind of switch transformer that is used for consumer electronic device.

Background technology

In recent years, various device all requires to save spatialization, thereupon, has tendencies such as miniaturization, slimming, and from now on, this tendency will be more and more stronger.

The equipment of slimming, for example DVD home theater, liquid crystal TV, PDP, mobile computer are considered to the main flow of demand from now on SWAD etc.Thereupon, Switching Power Supply also will be pursued slimming certainly.And if want to make the Switching Power Supply slimming, all on switch transformer, have bottleneck in any case.

Switch transformer has various types, and as the type of slimming, the application's applicant once proposed slimming switch transformer as shown in Figure 5.

This slimming switch transformer by: have the coil rack 22 that embedded coil 20 and pin terminals 21 and the transformer body of a pair of chipware 23, what cover this transformer body takes in shell 25, the screening can that is arranged on this inner surface of taking in shell 25 and constitutes by the conductor that covers above-mentioned transformer body, and, be injected into the above-mentioned resin of taking in the shell 25 26 that is provided with transformer body and constitute.

[patent documentation 1] special hope 2003-40545

When switch transformer is used for the power supply of stereo set, produce the noise of the frequency that comprises the range of audibility from this power supply, the noise that is produced can influence stereo set.

Because this noise has generation more on transformer, in order to prevent noise, and screening can 26 is set, takes in shell 25 etc. from transformer, under the situation of high-power transformer, above-mentioned switch transformer is very good.

But under the situation that low capacity gets final product, screening can 26, to take in shell 25 etc. might not be essential.In addition, if do not have screening can 26, take in shell 25, can realize miniaturization, the slimming of respective degrees.

Summary of the invention

The present invention proposes in view of the above problems, and its purpose is to provide a kind of minimizing components number and assembling procedure number etc., and realizes the switch transformer of miniaturization, slimming etc.

To achieve the above object of the invention, the present invention takes following technical scheme:

A kind of transformer, it is characterized in that possessing: coil rack, its have coil be wound onto the scroll portion of the hollow form on its periphery, the following side flange that forms respectively in the lower end and the upper end of described scroll portion and upper flange, at the both ends of upper flange respectively by integrally formed binding post plate and be located at a plurality of pin terminals of this binding post plate; The box-shaped chipware, it has the concavity incorporating section of the lower surface of scroll portion, the upper flange that covers above-mentioned coil rack, the side of descending side flange and following side flange, and is formed with center pillar, and described center pillar is formed on the central authorities and the above-mentioned scroll of the break-through portion of concavity incorporating section; And plane upside chipware, it is covered with the upper flange upper surface and is fixed in above-mentioned box-shaped chipware, and described upper flange upper surface is to be held between each binding post plate of upper flange of the coil rack that is housed in above-mentioned concavity incorporating section.

Described transformer is characterized in that: be filled with in taking in the described concavity incorporating section of described coil rack and fill resin.

According to the present invention the 1st, can realize above-mentioned purpose by following structure.It possesses:

transformer body

1,1A, and it is to reel coil 4 is installed on coil rack 2, and has embedded pin terminals 8; Box-

shaped chipware

9,9A, 9B, it is formed with takes in this transformer body 1, the concavity incorporating section 13 of 1A, 13A; Upside

chipware

14,14A, it is installed in the top of this box-

shaped chipware

9,9A, 9B, and covers the transformer body 1 that is accommodated in described concavity incorporating section 13, the 13A, the top of 1A.

According to the present invention the 2nd, as the 1st described switch transformer of above-mentioned the present invention, it constitutes, form binding

post plate

7,7A at the flange 5 of above-mentioned coil rack 2, the two ends of 5A, above-mentioned

pin terminals

8,8A have been embedded at this binding

post plate

7,7A, above-mentioned

upside chipware

14,14A cover between above-mentioned binding post plate 7, the 7A, and above-mentioned

binding post plate

7,7A and

pin terminals

8,8A are exposed on the external.

In addition, as the 1st of the present invention or the 2nd described switch transformer, its structure is potting resin in the concavity incorporating section 13 of taking in above-mentioned

transformer body

1,1A, 13A.

The 1st described invention according to the present invention, between box-

shaped chipware

9,9A, 9B and

upside chipware

14,14A, take in

transformer body

1,1A, described box-

shaped chipware

9,9A, 9B have opening portion, above-mentioned

upside chipware

14,14A also have as the function that covers the lid of this peristome one side,

transformer body

1,1A are covered by chipware, therefore, do not need shield member or take in shell, correspondingly, can cut down material cost, and assemble easily, can realize miniaturization, slimming.

The 2nd described invention according to the present invention by embedding the binding post plate that is formed by insulative resin, pin terminals 8, the 8A among the 7A, can be easy to install on installed surface.

The 3rd described invention according to the present invention can be carried out the insulation of

transformer body

1,1A reliably.

The simple declaration of accompanying drawing

Fig. 1 is the exploded perspective view of embodiments of the invention 1;

Fig. 2 is the combination stereogram of same embodiment 1;

Fig. 3 is the exploded perspective view of other embodiment of the present invention;

Fig. 4 is the further stereogram of the box-shaped chipware of other embodiment of the present invention;

Fig. 5 is the profile of prior art.

Embodiment

This characteristic feature of an invention is to save to take in the screening can of transformer body and take in shell, and chipware is used as screening can, takes in shell.

Below, based on the description of drawings embodiments of the present invention.

(embodiment 1)

Fig. 1 is the exploded perspective view of one embodiment of the invention, and Fig. 2 is a combination stereogram.

1 is transformer body among the figure, and the structure of this transformer body 1 is to possess: the coil rack 2 that is made of the insulative resin that is configured as suitable shape as required; Coiling is installed in the coil 4 on the periphery of scroll portion 3 of coil rack 2.

Form the upper flange 5 that for example is shaped as arc, side flange 6 down respectively at the two ends of the scroll portion 3 of coil rack 2, integrally formed separately thicker binding post plate 7 on the two ends of upper flange 5, this above binding post plate 7 embedding have a plurality of pin terminals 8 of appropriate intervals.In addition, coiling is installed in the lead-out wire (not shown) of the coil 4 on scroll portion 3 peripheries, and is well-known, is to twine the root that is installed in predetermined pin terminals by the lead-out groove (not shown) that forms on coil rack 2, and continue by welding, constitute transformer body 1 thus.

The 9th, the box-shaped chipware that constitutes by ferritic formed products, on the middle body of the base plate 10 that loads transformer body 1, form center pillar 11, and form the upright perisporium 12 that makes progress around base plate 10 under illustrated state, the space segment between center pillar 11 and perisporium 12 forms concavity incorporating section 13.

In this embodiment, the hollow space of the scroll portion 3 of center pillar 11 corresponding coil racks 2 forms cylindrical.In addition, for lower flange on inner receipt of

wire ring framework

25,6 and binding post plate 7, concavity incorporating section 13 forms and its profile cardinal principle corresponding shape.

The 14th, the upside chipware is made of the material identical with box-shaped chipware 9, and is arranged on the top of the peristome of box-shaped chipware 9.

This upside chipware 14 forms the tabular of rectangle for example, is arranged between each binding post plate 7 that is accommodated in the transformer body 1 in the box-shaped chipware 9, and covers the top chipware of upper flange 5.At this moment, cover and the perisporium 12 of the box-shaped chipware 9 of butt joint upper flange 5 on, and the bottom of the upside chipware 14 corresponding with it between application of adhesive (not shown), upside chipware 14 and box-shaped chipware 9 are by integrated.

The coil 4 of transformer body 1 and last lower flange 5,6 cover the function that box-shaped chipware 9 and upside chipware 14 have screening can concurrently and take in shell by box-shaped chipware 9 and upside chipware 14.

During assembling, in the concavity incorporating section 13 of box-shaped chipware 9, take in separately the transformer body 1 of assembling in advance, and for example filling resin such as epoxy resin.After potting resin, the sclerosis, if upside chipware 14 is installed in the top of the perisporium 12 of box-shaped chipware 9, even the assembling procedure by seldom, also assembled switch transformer easily by adhesive.In addition, well-known between center pillar 11 and the upside chipware 14 that is capped, be provided with the magnetic ditch of appropriate intervals.In addition, binding

post plate

7,7A above consider installation on the installed surface and top outstanding than upside chipware 14.

In the above description, the situation of taking in transformer body 1 back potting resin in box-shaped chipware 9 has been described, but also can have taken in transformer body 1 back covering upside chipware 14, and to the inner vacuum potting resin.In this case, can prevent sneaking into of air, guarantee the insulation of transformer body 1.

In addition, also can use the electric wire of three layers of electric wire, the filling of saving resin as coil 4.

In addition, also can be according to specification, the electric wire of coil 4 as common electric wire, is saved the filling of resin.

And then, the shape of transformer body 1, box-shaped chipware 9, upper housing core 14 is not limited in the illustrated example of above-mentioned Fig. 1 and Fig. 2, for example as shown in Figure 3, its structure also can be: transformer body 1A is seen as substantially elliptical from in-plane, transformer body 1A is accommodated in the box-shaped chipware 9A, described box-shaped chipware 9A has the concavity incorporating section 13A that can take in this transformer body 1A, and the tabular upside chipware 14A that is formed with the 14a of excision portion that exposes above of the binding post plate 7A that makes transformer body 1A is capped.

In addition, as shown in Figure 4, also can be that profile and the concavity incorporating section 13B of box-shaped chipware 9B forms ellipse, in addition, form suitable shape as required, assembling transformer body or upper housing thereon also forms corresponding its shape.

This invention can be used for DVD home theater, liquid crystal TV, PDP, mobile computer with SWAD etc.

Claims

1. transformer is characterized in that possessing:

Coil rack, its have coil be wound onto the scroll portion of the hollow form on its periphery, the following side flange that forms respectively in the lower end and the upper end of described scroll portion and upper flange, at the both ends of upper flange respectively by integrally formed binding post plate and be located at a plurality of pin terminals of this binding post plate;

The box-shaped chipware, it has the concavity incorporating section of the lower surface of scroll portion, the upper flange that covers above-mentioned coil rack, the side of descending side flange and following side flange, and is formed with center pillar, and described center pillar is formed on the central authorities and the above-mentioned scroll of the break-through portion of concavity incorporating section; And

Plane upside chipware, it is covered with the upper flange upper surface and is fixed in above-mentioned box-shaped chipware, and described upper flange upper surface is to be held between each binding post plate of the upper flange that is housed in the above-mentioned coil rack in the above-mentioned concavity incorporating section.

2. transformer as claimed in claim 1 is characterized in that: be filled with resin in taking in the described concavity incorporating section of described coil rack.