CN1260745C

CN1260745C - Anticurrent coil and its manufacturing method

Info

Publication number: CN1260745C
Application number: CN 03121535
Authority: CN
Inventors: 刘春條; 黄逸珉
Original assignee: Qiankun Science and Technology Co Ltd
Current assignee: Qiankun Science and Technology Co Ltd
Priority date: 2003-04-01
Filing date: 2003-04-01
Publication date: 2006-06-21
Anticipated expiration: 2023-04-01
Also published as: CN1534694A

Abstract

The present invention discloses an anti-current coil which is composed of a coil coating body, a coil main body arranged in the coil coating body, and electrode parts extending from both ends of a coil. The present invention is characterized in that the coil main body is a continuous conductive spiral coil formed by sheet metal. The present invention also discloses a manufacturing method of the anti-current coil.

Description

The manufacture method of choking winding

Technical field

The present invention relates to a kind of manufacture method of choking winding, be meant a kind of high electric current that is applicable to especially, and the manufacture method of light, thin, short, little choking winding inductor.

Background technology

As everyone knows, choking winding is made of a coil body and electrode, and in recent years, the personage has proposed multinomial scheme both at home and abroad, attempt proposes to improve to its structure and manufacture method, and it is closed in present high-tech computer product for light, thin, short, little requirement.The U.S. the 6th that checks and approves in calendar year 2001,204, in the 744B1 patent case, a kind of improved choking winding has been proposed, its profile is shown in Figure 1A, but choking winding 10 embeddings invest a circuit board 12, and it comprises a body 14, extending from body has first electrode 16 and second electrode 18, and respectively with circuit board on pad 20,22 weld mutually.

Please referring to Figure 1B and Fig. 1 C, this choking winding 10 is to utilize a cross section to form a coil 24 for the flat conductor of square, coil also becomes helical form, have a plurality of circles 30, and comprise that lead frame 32 that a medial extremity 26 and an outboard end 28, include first lead 16 and second lead 18 promptly is welded into one with the medial extremity 26 and the outboard end 28 of coil 24 respectively with two end 34,38.Then, the coil 24 that is welded with lead 16,18 is placed in the mold, and in mold, injects the magnetic moulding material, after the demoulding, the part of lead frame 32 is cut off, promptly get the choking winding of this United States Patent (USP) case.

Yet, this U.S. the 6th, 204,744B1 number choking winding still has following shortcoming:

1. though coil is formed by the flat conductor coiled of square, flat conductor is upright, makes made choking winding that suitable height still be arranged, and still can not satisfy light, thin, short, the little demand of present high-tech electronic product.

2. coil and lead frame must be made respectively during fabrication, cause the program of its manufacturing effectively to reduce, and cause its production cost still higher.

3. during fabrication, lead frame forms after the lead by punching press, lead must be connected with outboard end with the inboard of coil, must another one to the step of lead punching press lead is connected with outboard end with the medial extremity of coil, so produce more manufacturing step.

4. because fabrication schedule is still kept more step, cause the chance of formation defective products in its manufacture process bigger, comparatively slow, production capacity also can't extremely effectively improve, and cost also just can't reduce effectively.

Because above-mentioned choking winding has above-mentioned shortcoming, the inventor is at the road of those shortcoming research improvement, and research has the present invention to produce eventually when long.

Summary of the invention

Therefore, the present invention promptly aims to provide a kind of manufacture method of choking winding, manufacture method according to this kind choking winding of the present invention, its coil body forms with thin conducting strip, so can obtain thin coil body, cause its integral body thinner, thus light, thin, short, little demand on the satisfied electronics technology product now.

According to the manufacture method of this kind choking winding of the present invention, its coil and lead frame are made into integration, and need not coil and lead and weld and the manufacturing step of formation electrode in addition, and its fabrication schedule greatly reduces, and production cost promptly greatly reduces, and this is an of the present invention purpose.

According to the manufacture method of this kind choking winding of the present invention, because coil and lead frame become one the result that its manufacturing step greatly reduces, the chance that forms fraction defective during the course also greatly reduces, manufacturing speed is faster, and production capacity can improve effectively, and this is a further object of the present invention.

According to the manufacture method of this kind choking winding of the present invention, it utilizes simple punching press and welding equipment to make, and need not complex apparatus just can make, and it can implement one-stop operation, and this is an another purpose of the present invention.

For achieving the above object, the invention provides a kind of choking winding, this choking winding is to be made of a coil cladding, coil body located therein and the electrode part branch that is extended from the coil two ends; It is characterized in that: coil body is with the formed continuous conduction helical coil of sheet metal.

Wherein, this continuous conduction helical coil body is can be by two conductivity spiral sheet body weight folded and be welded in its end;

Can become the state of insulation between two overlapping conductivity spiral plates.

In addition, the present invention also provides a kind of manufacture method of choking winding, comprises the following steps:

Utilize conductive metal thin plate to strike out two groups of lead frames with helical metal conducting strip; Make the end overlaid of two groups of spiral helicine metallic conduction sheets, and weld together, make it to become single continuous conductive sheet spiral coil;

Described single continuous conductive sheet spiral coil is placed in the mould, and in mould, fills magnetic material powder,, and give molded with the Wrapping sheet spiral coil;

Take out the thin slice spiral coil that is coated by magnetic material powder and strip is cut off, promptly get the choking winding that the two side ends mask has outward extending battery lead plate.

In the method, battery lead plate can be again to the corner bending of coil cladding, and make the two sides of cladding all have electrode.

Two groups of spiral helicine metallic conduction sheets all can be by insulating layer coating except the part that connects, or between two groups of spiral helicine metallic conduction sheets except the part that connects, be provided with a separator.

In addition, utilize the formed two groups of lead frames of conductive metal thin plate punching press, each group lead frame has a pedestal respectively, and the supporting bracket and the described spiral helicine metallic conduction sheet that extend from the pedestal lateral margin, and this helical metal conducting strip links to each other with pedestal with strip.

And, two groups of lead frames that punching press became, the strip between its pedestal and the helical metal conducting strip can be splintery.

In addition, with spiral helicine metallic conduction sheet overlapping and when welding, pedestal also can be overlapping.

As for detailed construction of the present invention, application principle, effect and effect, then the explanation of doing with reference to following adjoint can be understood completely.

Description of drawings

Figure 1A to Fig. 1 C figure: be the U.S. the 6th, 460, the enforcement illustration of 244B1 patent;

Fig. 2 A figure to Fig. 2 C: be structure embodiment schematic diagram of the present invention;

Fig. 3 A to Fig. 3 E: be manufacture method block diagram of the present invention;

Fig. 4 A to Fig. 4 E: be the manufacture method block diagram of another embodiment of the present invention;

Fig. 5 A to Fig. 5 E: be the manufacture method block diagram of another embodiment of the present invention.

Embodiment

United States Patent (USP) 6,204 shown in Figure 1A to Fig. 1 C, the choking winding of 744B1, its structure, manufacture process and shortcoming as mentioned above, repeated description no longer herein.

Shown in Fig. 2 A, this kind choking winding of the present invention is to be made of a coil cladding 50, coil body 60 located therein and 70,80 of the electrode parts of extending from the two ends of coil body 60.Wherein, coil cladding 50 is coating the formed body of coil body for the magnetic material powder molding; Coil body 60 becomes 61,62 formations of spiral helicine thin metal conducting strip with two, and utilizes welding or additive method that two thin metal conducting strips are connected in its central end, becomes single continuous spiral coil; Outward extending two

electrode slices

70,80 from the two ends of coil body 60 constitute the contact in order to join with circuit; Above-mentioned coil body 60, insulating material can be covered on it, switch on to avoid two spiral helicine

metallic conduction sheet

61,62 overlaids, cause coil 60 parts not become single and continuum of states, and outward extending two

electrode slices

70,80 also can be to the surperficial corner bending of coil cladding 50, making becomes double-face electrode, so that join at circuit junction with different forms.

And for example shown in Fig. 2 B and Fig. 2 C,

electrode slice

70,80 also can form many inserted sheets 701,702 ..., 801,802 ... state, and inserted sheet also can be located at the both sides or a side of cladding 50, makes it to become the pins type choking winding.

The manufacture method of choking winding of the present invention, shown in Fig. 3 A to Fig. 3 E, (for example at first utilize conductive metal thin plate, preferable is copper sheet), strike out two groups of lead frames 100,200, each group lead frame 100,200 has a pedestal 101,201 respectively, and the supporting bracket 102,103,202,203 of extending from pedestal 101,201 1 sides, and spiral helicine

metallic conduction sheet

61,62; Between this helical

metal conducting strip

61,62 and the pedestal 101,201, and strip 104,204 (its situation as shown in Figure 3A) is arranged.Two groups of lead frames 100, after 200 acquisitions, make its spiral helicine

metallic conduction sheet

61,62 end 610,620, and be located at this helical metal conducting strip 61, the supporting bracket 102 of 62 both sides, 103,202,203 overlaids, and weld together (its situation is shown in Fig. 3 B), herein, need give explanation, two spiral helicine

metallic conduction sheets

61,62 will constitute a continuous conductivity spiral coil, therefore, before welding, preferable prior to helical metal conducting strip 61, part beyond 62 the end is by insulating layer coating, so, two helical

metal conducting strips

61,62 after its end welding, promptly constitutes a continuous conductivity spiral coil 60; And supporting bracket 102,103,202,203 both sides after the overlapping and welding, constitute bracing frame, so that the carrying out of next step in the end.

Conductivity spiral coil 60 parts that constitute through welding are placed in the mould, and support with the bracing frame that pedestal 101,201 and supporting bracket 102,103,202,203 are constituted; And in mould, fill magnetic material powder, molded then (shown in Fig. 3 C).

From mould, take out and utilized magnetic material powder molded and coating the cladding 50 of conductivity spiral coil 60, again strip 104,204 and bracing frame are cut off, promptly getting the two side ends mask has the choking winding of outward extending battery lead plate 70,80 (shown in Fig. 3 D), with the corner bending of

battery lead plate

70,80, promptly get choking winding (shown in Fig. 3 E) again with double-face electrode to coil cladding 50.

And for example shown in Fig. 4 A to Fig. 4 E, two groups of lead frames 100,200 that punching press became, strip 104,204 between its pedestal 101,201 and the helical

metal conducting strip

61,62 also can be splintery, depending on the choking winding of aforementioned identical manufacturing step gained, is the choking winding that coil cladding 50 both sides form pin 701,702,703,801,802,803.

Shown in Fig. 5 A to Fig. 5 E,, make pedestal 101,201 overlaids of two groups of lead frames 100,200 for another example, can obtain only having the choking winding of pin 701,702,703,704 in a side of coil cladding 50 if when welding.

This kind choking winding of the present invention, the conductivity helical coil that two helical metal conducting strips of its coil body are constituted, its coil becomes sheet type, so its volume greatly reduces, and it is light to satisfy present high tech electron product, thin, short, little requirement, and, the manufacture method of choking winding of the present invention only needs punching press, welding, fill magnetic material powder and molded, and the step of cutting off strip and bracing frame, its fabrication schedule is greatly simplified, and need not to utilize the high price machine to make, manufacturing cost promptly greatly reduces, for having the invention of industrial utilization.

Need Chen Ming, the above is the preferable specific embodiment of the present invention, if comply with the change that conception of the present invention is done, and the function of its generation, when not exceeding specification yet and illustrating contained spiritual, all should be in protection scope of the present invention.

Claims

1. the manufacture method of a choking winding is characterized in that: comprise the following steps:

2. the manufacture method of choking winding as claimed in claim 1 is characterized in that: battery lead plate is again to the corner bending of coil cladding, and makes the two sides of cladding all have electrode.

3. the manufacture method of choking winding as claimed in claim 1, it is characterized in that: two groups of spiral helicine metallic conduction sheets are except the part that connects, all give by insulating layer coating, or between two groups of spiral helicine metallic conduction sheets except the part that connects, a separator is arranged.

4. the manufacture method of choking winding as claimed in claim 3, it is characterized in that: utilize the formed two groups of lead frames of conductive metal thin plate punching press, each group lead frame has a pedestal respectively, and the supporting bracket and the described spiral helicine metallic conduction sheet that extend from the pedestal lateral margin, and this helical metal conducting strip links to each other with pedestal with strip.

5. the manufacture method of choking winding as claimed in claim 1, it is characterized in that: two groups of lead frames that punching press became, the strip between its pedestal and the helical metal conducting strip is a splintery.

6. the manufacture method of choking winding as claimed in claim 5 is characterized in that: during with the overlapping and welding of spiral helicine metallic conduction sheet, pedestal is also overlapping.