CN103093935A - Coil component and manufacturing method thereof - Google Patents
Coil component and manufacturing method thereof Download PDFInfo
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- CN103093935A CN103093935A CN2011103394444A CN201110339444A CN103093935A CN 103093935 A CN103093935 A CN 103093935A CN 2011103394444 A CN2011103394444 A CN 2011103394444A CN 201110339444 A CN201110339444 A CN 201110339444A CN 103093935 A CN103093935 A CN 103093935A
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Abstract
A manufacturing method for a coil component includes a forming step: forming a first coil and a second coil which are mutually connected, wherein the first coil is positioned on the inner side of the second coil; an arranging step: arranging a tail-end coil section of the first coil on a tail-circle coil section of the second coil along the outline of the tail-circle coil section; and a coating step: coating the first coil and the second coil. By above manufacturing method, overlapping area of the tail-end coil section of the inner coil and the outer coil is enlarged, insulating layers of the coils are enabled to be less prone to falling off or being damaged, thus, durability of the coil component is improved, and service life of the coil component is prolonged.
Description
Technical field
The present invention is about a kind of coil and preparation method thereof, especially in regard to a kind of coil block and preparation method thereof.
Background technology
Coil block is broad-spectrum basic electronic building brick, and it can be used as inductor, also can be used as the solenoid winding of transformer or motor.
Figure 1A is the top view of a coil block 1, and Figure 1B is the perspective internal view of coil block 1, and as shown in Figure 1A and Figure 1B, coil block 1 has inside and outside two-layer coil 11,12, two electrode pins 13,14 and one cladding 15.11 inboard and coils 11,12 at coil 12 of its coil are connected to each other, and coil 11,12 tail end respectively as the contact of electrical connection use, are used for being connected with the electrode pin, 14 connections, and cladding 15 coats coil 11,12.
Coil 11, the 12nd is wound up as three-dimensional helical form, its winding mode is first to lay out internal layer helical coil 11 and then lay out outer helical coil 12, therefore the tail end position of outer helical coil 12 is in the outside of coil block 1, and the tail end position of internal layer helical coil 11 is in the inboard of coil block 1.For the tail end of position at internal layer helical coil 11 outwards being electrically connected, as the dotted line marked position of Figure 1B, the tail end of internal layer helical coil 11 need directly stride across outer coil along radially extending toward the outside.Yet, after coil block 1 uses a period of time, the overlapping part that is connected across outward outer coil 12 from inner coil 11 is easily damaged because of the insulating barrier of coil, and causes coil block 1 normal operation to use, and makes that the durability of coil block 1 is not good and useful life is not long.
In addition, if not with the directly cross-over connection outward of tail end of inner ring, need to make in addition electrode cable, weld together with the tail end of inner coil.But this mode needs extra manufacturing electrode cable and need to weld, and whole fabrication schedule needs to increase, and production cost also is not easy to reduce.And, having the solder joint generation owing to welding on coil, the chance that causes forming fraction defective in its manufacture process greatly increases, and quality is more wayward.
Therefore, how to provide a kind of coil block, have the structure of simplifying, better durability and useful life, become one of important topic.
Summary of the invention
Purpose of the present invention is for providing a kind of the have structure of simplifying, better durability and the coil block in useful life and preparation method thereof.
The present invention can realize by the following technical solutions.
The manufacture method of a kind of coil block of the present invention comprises that one forms step, ornaments step and an encapsulation steps, forms step and forms one first coil connected to one another and one second coil, and the first coil position is in described the second coil inboard; The ornaments step with a tail end line segment part of the first coil along the profile ornaments of a last astragal section of the second coil on last astragal section; Encapsulation steps coats the first coil and the second coil.
In addition, a kind of coil block of the present invention comprises one first coil and one second coil, and the first coil has a tail end line segment; The second coil position has a last astragal section in the outside of the first coil, and the profile ornaments of the last astragal section in edge of tail end line segment part are on last astragal section.
From the above, coil block of the present invention and preparation method thereof avoids the tail end line segment of coil directly to stride across outer coil toward outside extension from the inboard of coil block suddenly, but see through the mode that comparatively relaxes, allow tail end line segment elder generation profile along outer coil on outer coil of inner coil furnish, then the tail end line segment extends outwardly from outer coil again.Therefore, the tail end line segment of inner coil and the overlapping area of outer coil increase, and make coil covering be not easy to come off or breakage, and then promote durability and the useful life of coil block.
Description of drawings
Figure 1A is a kind of top view of known coil block;
Figure 1B is the perspective internal view of the coil block of Figure 1A;
Fig. 2 is the flow chart of manufacture method of a kind of coil block of the preferred embodiment of the present invention;
Fig. 3 A to Fig. 3 H is the schematic diagram of manufacture method of a kind of coil block of the preferred embodiment of the present invention;
Fig. 4 A and Fig. 4 B are one group of schematic diagram of variation aspect of manufacture method of the coil block of the preferred embodiment of the present invention;
Fig. 5 A is the top view of a kind of coil block of the preferred embodiment of the present invention;
Fig. 5 B is the perspective internal view of the coil block of Fig. 5 A;
Fig. 6 is the perspective internal view of the another kind of coil block of the preferred embodiment of the present invention;
Fig. 7 A is the top view of a kind of coil block of the preferred embodiment of the present invention; And
Fig. 7 B is the perspective internal view of the coil block of Fig. 7 A.
The main element symbol description:
1: coil block
11,12: coil
13,14: the electrode pin
15: cladding
2,2 ', 2 ": coil block
20: coiled wire-wound coil
21: the first coils
210: main section
211: the tail end line segment
22: the second coils
221: last astragal section
2n: n coil
23,24: pin
23 ', 24 ': electrode terminal
25: cladding
251,252: groove
3: lead frame
30,31,32: part
4: pass assembly
S1～S3: the step of the manufacture method of coil block
D1: first direction
D2: second direction
Embodiment
Hereinafter with reference to correlative type, a kind of coil block according to the preferred embodiment of the present invention and preparation method thereof is described, wherein identical element will be illustrated with identical component symbol.
Fig. 2 is the flow chart of manufacture method of a kind of coil block of the preferred embodiment of the present invention.
As shown in Figure 2, manufacture method comprises the following steps:
Step S01: one forms step, forms one first coil connected to one another and one second coil, and the first coil position is in the second coil inboard;
Step S02: an ornaments step, a tail end line segment of the first coil is furnished on last astragal section along the profile of a last astragal section of the second coil; And
Step S03: an encapsulation steps coats the first coil and the second coil.
The first coil and the second coil are formed by the same wire rod, and the wire rod internal layer is provided with wire, and the wire rod skin is provided with the insulation material and coats inner conductor, when the coil of different layers is arranged on when other each other, even contact with each other can short circuit yet for wire rod.At this, wire rod can be but not be defined as enamelled wire, and its cross sectional shape is for example circular.In addition, also can to adopt cross sectional shape be square or flat-shaped wire rod to coil.
In addition, between step S02 and step S03, the first coil after winding shaping and the second coil can arrange and be connected to a lead frame, then at step S03, the first coil on lead frame and the second coil are coated on a cladding.Then, the main body of lead frame is removed, stays segment conductor as pin from lead frame simultaneously, pin before be connected coil and be connected with the second coil.The surface bending of pin from tabular along cladding, the bending shape of pin depending on product demand and design.Pin is as be connected the electrode terminal of use with external circuit.
In the present embodiment, coil block can be used as choking winding (Choke), and it is also a kind of Inductive component, is mainly used in the sudden change of filtering or Limited Current.
Below will illustrate the manufacture method of coil block.
Fig. 3 A to Fig. 3 H is the schematic diagram of manufacture method of a kind of coil block of the preferred embodiment of the present invention.
As shown in Fig. 3 A and Fig. 3 B, the present embodiment take lay out have two-layer coil coil block 2 as the example explanation.As shown in Figure 3A, with a wire rod by an end along the clockwise winding of spiral of a first direction D1 (down), to form the first coil 21.Then, as shown in Fig. 3 B, with the residue line segment of wire rod along the winding of a second direction (up) D2 at the clockwise spiral in the outside of the first coil 21, to form the second coil 22.At this, wire rod coiling becomes coil and can utilize coil winding machine to carry out or be undertaken by manual type.
The first coil 21 connected to one another and the second coil 22 thereby to form 21 of coiled wire-wound coil 20, the first coils inboard and be adjacent to the second coil 22 inner edge settings at the second coil 22, the first coil 21 and the second coil 22 are vertical screw winding formeds.
After forming coiled wire-wound coil 20 (the first coil 21 and the second coil 22), one tail end line segment 211 and a last astragal section 221 be a side at coiled wire-wound coil 20 all, tail end line segment 211 is that the line segment to tail end is enclosed at the end of the first coil 21, end astragal section 221 is that the line segment to tail end is enclosed at the end of the second coil 22, and the junction of the first coil 21 and the second coil 22 is that the position is at the opposite side of coiled wire-wound coil 20.
The pitch of the laps number of inner coil can be more than the pitch of the laps number of outer coil, and in the present embodiment, the pitch of the laps number of the first coil 21 is more than at least one circle of pitch of the laps number of the second coil 22.
In the present embodiment, the cross section of coiling wire is circular, and circular cross section allows wire rod comparatively easily be wound around thereby is conducive to make coil, and wire rod can be enamelled wire.
Then, as shown in Figure 3 C, tail end line segment 211 is untied (for example stretching) from the first coil 21, i.e. part or all of the untiing of the end of the first coil 21 circle.
Then, as shown in Fig. 3 D, with the profile ornaments of tail end line segment 211 parts after untiing along last astragal section 221, the end section of tail end line segment 211 extends outwardly from last astragal section 221.In design, the end section of tail end line segment 211 can extend outwardly along the tangent line of the profile of last astragal section 221.One main section 210 of the first coil 21 is along the winding of first direction spiral, and tail end line segment 211 is connected with main section 210, and by interior snail outwardly around.That is to say, the main section 210 of the first coil 21 and tail end line segment 211 winds the line according to different forms, and main section 210 is to be wound in three-dimensional helical form, tail end line segment 211 be on outer coil the plane around.In addition, because coil block 2 is that to have two-layer coil be example explanation, tail end line segment 211 around the number of turns may less than one circle.
With coiled wire-wound coil 20 on the whole, the tail end of the first coil 21 and the second coil 22 is all to extend from the outmost turns of coiled wire-wound coil 20.
In addition, the first coil 21 and the second coil 22 be spiral winding counterclockwise, and first direction can also be up, and second direction can also be down.
Then, as shown in Fig. 3 E, coiled wire-wound coil 20 is welded on a lead frame 3, can place simultaneously a plurality of coiled wire-wound coils 20 on lead frame 3, lead frame 3 is in order to fixedly coiled wire-wound coil 20 is for the cladding of subsequent step formation coil block 2, and two parts 31,32 of lead frame 3 can be used as the pin of coil block 2.
As shown in Fig. 3 F, the coiled wire-wound coil 20 (being not shown in figure) on lead frame 3 is coated by a cladding 25, and cladding 25 can utilize mould to be shaped, the main material of cladding 25 can but be not defined as resin, so as to isolated coil and external environment condition.In addition, the material of cladding 25 can comprise magnetic material, so as to improving permeability.For instance, cladding 25 is that magnetic material and thermosetting resin mix, and forms through a solidification process (Curing Process).In addition, can be formed with groove 251,252 on the surface of cladding 25.
As shown in Fig. 3 G, after forming cladding 25, remove the main portion 30 (please refer to 3F) of lead frame 3, stay simultaneously two parts 31,32 of lead frame 3 to form two pins 23,24.
As shown in Fig. 3 H, after pin 23,24 formed, it was along the surface bending of cladding 25, and pin 23,24 can embed the groove 251,252 of cladding 25.
In addition, the manufacture method of coil block such as Fig. 3 A to Fig. 3 D can directly coat coiled wire-wound coil 20 with cladding, that is not carry out the step of Fig. 3 E to 3H after coiled wire-wound coil 20 is formed.Two ends of coiled wire-wound coil 20 i.e. direct electrode terminal as external electric connection use.The major part that encapsulation steps only coats the first coil 21 and the second coil 22 is the part of pitch of the laps for example, makes tail end line segment 211 and the end of last astragal section 221 not be wrapped by and expose.
On the other hand, coiled wire-wound coil 20 production methods of Fig. 3 A to Fig. 3 D also have other change aspect.
For example, in the coiling process, wire rod can specially stay one section line segment that is not wound around as the tail end line segment from tail end, and namely the tail end line segment does not comprise the end circle of the first coil, thus, does not just need the first coil is untied.Similarly that as long as directly the major part of tail end line segment is furnished along the profile of last astragal section, the end section of tail end line segment extends outwardly from the tangent line of last astragal section with Fig. 3 D.The coiled wire-wound coil of completing the tail end adjustment can continue according to the processing procedure after Fig. 3 E to make.
In addition, as shown in Fig. 4 A and Fig. 4 B, the first coil 21 of coiled wire-wound coil 20 and the second coil 22 can be made according to the mode of Fig. 3 A and Fig. 3 B, and different with Fig. 3 D from Fig. 3 C is that the tail end line segment 211 of the first coil 21 is moved on the last astragal section 221 of the second coil 22 by the mode of passing.Its production method is after the coiled wire-wound coil 20 as Fig. 3 B forms, and utilizes one to pass assembly 4 tail end line segment 211 thruster is outwardly pushed up in the inboard of the first coil 21.Specifically, as Fig. 4 A, pass the degree of depth that assembly 4 places and only arrive tail end line segment 211 inboards, its initial position is above the nearside wheel profile of the main section 210 of the first coil 21, then pass assembly 4 and move by side to gradually main section 210 tops outwardly, coordinate simultaneously rotation coiled wire-wound coil 20, make tail end line segment 211 move towards the outside gradually.As Fig. 4 B, after passing assembly 4 and moving to the nearside wheel profile top of last astragal section 221, tail end line segment 211 has namely been moved to last astragal section 221.The coiled wire-wound coil 20 of completing the tail end adjustment can continue according to the processing procedure after Fig. 3 E to make.In addition, complete the coiled wire-wound coil 20 that tail end is adjusted, also can directly coat coiled wire-wound coil 20 with cladding, that is not carry out the step of Fig. 3 E to 3H.Two ends of coiled wire-wound coil 20 i.e. direct electrode terminal as external electric connection use.The major part that encapsulation steps only coats the first coil 21 and the second coil 22 is the part of pitch of the laps for example, makes tail end line segment 211 and the end of last astragal section 221 not be wrapped by and expose.
Fig. 5 A is the top view of the coil block 2 of the embodiment of the present invention, Fig. 5 B is the perspective internal view of coil block 2, as shown in Fig. 5 A and 5B, coil block 2 comprises the first coil 21, the second coil 22, cladding 25 and two pins 23, 24, the first coil 21 has tail end line segment 211, the second 22 of coils are in the outside of the first coil 21 and have last astragal section 221, the profile ornaments of the last astragal section 221 in edge of tail end line segment 211 parts are on last astragal section 221, cladding 25 coats the first coil 21 and the second coil 22, pin 23, 24 connect respectively tail end line segment 211 and last astragal section 221.The main section of the first coil 21 is along the winding perpendicular to the direction spiral of drawing, and tail end line segment 211 is connected with main section, and by interior snail outwardly around.
As shown in Figure 6, different from Fig. 5 B is, the coil quantity in coil block 2 ' is not limited to two-layer, and it can comprise the coil of more multi-layered number.For example: coil block 2 ' also comprises a tertiary coil, the tertiary coil position is in the outside of the second coil, the profile ornaments along the last astragal section of the second coil of tail end line segment 211 parts, tail end line segment 211 are the profile ornaments along a last astragal section of tertiary coil of part also.
The tail end line segment 211 of innermost layer coil 21 is not directly radially to extend toward the outside, but the coiling of level on the end face of other layer line circle.For instance, coil block 2 ' sequentially comprise from internal layer toward skin the first coil 21, the second coil ... and n coil 2n, two adjacent coils are connected to each other, the first coil 21 has with n coil 2n the tail end that other coil of discord connects, all the position is in a side of coil block 2 ' for the tail end line segment of the first coil 21 and n coil 2n, and the tail end line segment of the first coil 21 is from internal layer toward outer coiling of enclosing level along the end of the second coil to the n coil 2n.Wherein, Fig. 6 draws take n as 4 situation, but also non-limiting n must be 4.That is to say, the main section of the first coil 21 winds the line according to different forms from tail end line segment 211, and main section is to be wound in three-dimensional helical form, and tail end line segment 211 is to encompass the snail shape on outer coil.
The pitch of the laps number of inner coil can be more than the pitch of the laps number of outer coil, and in the present embodiment, the pitch of the laps number of the first coil 21 is more than at least one circle of pitch of the laps number of other coil (the 22nd coil to the n coil 2n), and other coil can have identical pitch of the laps number.
Fig. 7 A is the coil block 2 of the embodiment of the present invention " top view, Fig. 7 B is coil block 2 " perspective internal view, as shown in Fig. 7 A and Fig. 7 B, overhang also can be directly as electrode terminal.
Coiled wire-wound coil can form as the manufacture method of Fig. 3 A to Fig. 3 D, also can form as the manufacture method of Fig. 4 A and 4B.Coiled wire-wound coil after forming as Fig. 3 D or Fig. 4 B directly coats with cladding 25, namely the last astragal section 221 of the tail end line segment 211 of the first coil 21 and the second coil 22 is not welded on lead frame, the major part that cladding 25 only coats the first coil 21 and the second coil 22 is the part of pitch of the laps for example, and the end of tail end line segment 211 and last astragal section 221 is not wrapped by and is exposed to cladding 25 and as electrode terminal 23 ', 24 '.In the present embodiment, the caliber of coiled wire-wound coil is coarser than the caliber of the coiled wire-wound coil of Fig. 3 A to Fig. 6, and the material of coiled wire-wound coil can be the copper cash that the surface is covered with insulating barrier.
In addition, coil block 2 " also can comprise the plural layer coil; for example: coil block 2 " also comprise a tertiary coil, the tertiary coil position is in the outside of the second coil 22, the profile ornaments along the last astragal section of the second coil of tail end line segment 211 parts, tail end line segment 211 are the profile ornaments along a last astragal section of tertiary coil of part also.Its details is as described in Fig. 6 and related description thereof, so repeat no more.
Similar with the coil block of earlier figures 5A to Fig. 6, the main section of the first coil 21 is along the winding of first direction spiral, and tail end line segment 211 is connected with main section, and by interior snail outwardly around.
That is to say, the main section of the first coil 21 and tail end line segment 211 winds the line according to different forms, and main section 210 is to be wound in three-dimensional helical form, tail end line segment 211 be on outer coil the plane around.In addition, due to coil block 2 " be that to have two-layer coil be the example explanation, tail end line segment 211 around the number of turns may be less than a circle.The first coil 21 and the second coil 22 are vertical spiral windings, and the level of tail end line segment 211 parts of the first coil 21 stacks on the last astragal section 221 of the second coil 22.Due to relevant details as described in Fig. 5 A to Fig. 6 and related description thereof, so repeat no more.
In above embodiment, no matter the coil number of plies in coil block why, with coil block on the whole, two tail ends of coil are all to extend from the outmost turns of coil block.The first coil and the second coil are mainly vertical spiral windings, stack on the last astragal section of the second coil but the tail end line segment of the first coil changes the level of part into.When making coil block, can first form the position at first coil of inboard, and then form the position at second coil in the outside, follow-uply again the tail end line segment of the first coil be made on the last astragal section that is arranged on the second coil of part.That is to say, coil block comprise a plurality of inside and outside stacking coil sequentially, wherein the coil of innermost layer has a tail end line segment, and all the other each layer line circles have respectively a last astragal section, and the profile along each last astragal section of tail end line segment part is furnished on each last astragal section.
All the position is in a side of coil block for the tail end line segment of the first coil and the second coil, and the tail end of tail end line segment is the end points that externally connects.For instance, the tail end of tail end line segment can directly be connected with external circuit as electrode terminal, or is connected with pin and sees through pin and external circuit and be electrically connected.
In sum, coil block of the present invention and preparation method thereof avoids the tail end line segment of coil directly to stride across outer coil toward outside extension from the inboard of coil block suddenly, but see through the mode that comparatively relaxes, allow tail end line segment elder generation profile along outer coil on outer coil of inner coil furnish, then the tail end line segment extends outwardly from outer coil again.Therefore, the tail end line segment of inner coil and the overlapping area of outer coil increase, and make coil covering be not easy to come off or breakage, and then promote durability and the useful life of coil block.
The above is only illustrative, and non-limiting.Anyly do not break away from spirit of the present invention and category, and to its equivalent modifications of carrying out or change, all should be included in the claim limited range.
Claims (10)
1. the manufacture method of a coil block, is characterized in that, comprising:
One forms step, forms one first coil connected to one another and one second coil, and described the first coil position is in described the second coil inboard;
One ornaments step, with a tail end line segment part of described the first coil along the profile ornaments of a last astragal section of described the second coil on described last astragal section; And
One encapsulation steps coats described the first coil and described the second coil.
2. manufacture method according to claim 1, is characterized in that, also comprises:
One welding step is welded on a lead frame with described the first coil and described the second coil;
One removes step, after described encapsulation steps, removes described lead frame to form two pins; And
One bending step is with described pin bending.
3. manufacture method according to claim 1, is characterized in that, described formation step comprises:
With the winding along a first direction spiral of a first part of a wire rod, to form described the first coil; And
With described wire rod one second the part along the winding of a second direction at the outside of described the first coil spiral, to form described the second coil, wherein said second direction and described first direction are opposite each other.
4. manufacture method according to claim 1, is characterized in that, described ornaments step comprises:
Described tail end line segment is untied from described the first coil; And
With the profile ornaments of described tail end line segment along described last astragal section.
5. manufacture method according to claim 1, is characterized in that, described ornaments step comprises:
From described the first coil of the opposite side ejection of described tail end line segment, make described tail end line segment eject; And
Guiding described tail end line segment moves on described last astragal section.
6. manufacture method according to claim 1, is characterized in that, described encapsulation steps only coats the major part of described the first coil and described the second coil, makes the end of described tail end line segment and described last astragal section not be wrapped by and expose.
7. manufacture method according to claim 1, is characterized in that, a main section of described the first coil is along the winding of a first direction spiral, and described tail end line segment is connected with described main section, and by interior snail outwardly around.
8. a coil block, is characterized in that, comprising:
One first coil has a tail end line segment; And
One second coil, the position has a last astragal section in the outside of described the first coil, and the profile along described last astragal section of described tail end line segment part is furnished on described last astragal section.
9. coil block according to claim 8, is characterized in that, a main section of described the first coil is along the winding of a first direction spiral, and described tail end line segment is connected with described main section, and by interior snail outwardly around.
10. coil block according to claim 8, is characterized in that, also comprises:
One cladding coats described the first coil and described the second coil; And
Two pins connect respectively described tail end line segment and described last astragal section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103394444A CN103093935A (en) | 2011-11-01 | 2011-11-01 | Coil component and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103394444A CN103093935A (en) | 2011-11-01 | 2011-11-01 | Coil component and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103093935A true CN103093935A (en) | 2013-05-08 |
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ID=48206401
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103394444A Withdrawn CN103093935A (en) | 2011-11-01 | 2011-11-01 | Coil component and manufacturing method thereof |
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| CN (1) | CN103093935A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113571286A (en) * | 2021-07-27 | 2021-10-29 | 浙江田中精机股份有限公司 | NFC coil blank and winding device thereof |
| EP3979273A1 (en) * | 2020-09-30 | 2022-04-06 | Hitachi Energy Switzerland AG | Split winding assembly for a transformer |
-
2011
- 2011-11-01 CN CN2011103394444A patent/CN103093935A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3979273A1 (en) * | 2020-09-30 | 2022-04-06 | Hitachi Energy Switzerland AG | Split winding assembly for a transformer |
| CN113571286A (en) * | 2021-07-27 | 2021-10-29 | 浙江田中精机股份有限公司 | NFC coil blank and winding device thereof |
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Application publication date: 20130508 |