CN1210730C

CN1210730C - Ironcore coil structure for SMD and its manufacturing method

Info

Publication number: CN1210730C
Application number: CN 02132681
Authority: CN
Inventors: 范云光
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-07-26
Filing date: 2002-07-26
Publication date: 2005-07-13
Anticipated expiration: 2022-07-26
Also published as: CN1471112A

Abstract

The present invention relates to an iron core coil structure for SMD and a manufacturing method thereof. The iron core coil structure for SMD is formed by that the left end and the right end of a core limb are slotted, conducting strips symmetrically shaped and preset at both tail ends of a conductor wire rack are fixedly connected with terminals, an insulating base is shaped at each of both ends of the core limb, the core limb part of the insulating base is not coated, and both ends of a conducting coil are welded at contact terminals or conductive terminals of the conducting strip by means of the winding of the conducting coil. The manufacturing method provided by the present invention can simplify the complicated process of a common technique to carry out mass production; when the present invention is installed for use, the plan of the installing space is more flexible.

Description

Can be for the iron core coil structure and the manufacture method thereof of SMD use

Technical field

The present invention's invention is about a kind of iron core coil structure for the SMD use, particularly a kind of two ends are provided with the core structure body and the mutual collocation of conducting wire frame structure of fluting, and by the technology of the made iron core coil structure that uses for SMD of encapsulation technology and stamping technology manufacture method.

Background technology

Using always can be for its manufacture method of iron core coil structure of SMD use, shown in Fig. 1 (A), it is in the mode of electroplating in iron core bottom surface 811, plate the alloy of silver and palladium, make it become two conductive electrodes 812, and will be around in iron core 81,82 liang of rear line heads 821 of coil with soldering fixing after, promptly becoming one can be for the iron core coil structure 8 of SMD use, and the major defect on its formation is: silver is high with the price of palladium, the difficult treatment of electroplating wastewater, must make the cost cost too high, and electroplating wastewater is not good at the then possibility subject to severe risks of damage of environment and ecology if handle.

Again, another kind of relevant for can being with in type iron-core workpiece 91 for the prior art of the iron core coil structure 9 of SMD use, after coiling 92, have the pedestal 93 of conductive electrode 931 with AB gluing solid, as Fig. 1 (B) and (C), becoming one can be for the iron core coil structure 9 of SMD use, the iron-core coil that this kind processing procedure is made, though can avoid the use of silver and palladium, increased base part, make processing procedure more complicated, also increased volume and height, cost can't effectively be controlled.

The present patent application people is in view of every shortcoming that above-mentioned skill commonly used produced, once the improvement that proposed correlation technique (please refer to People's Republic of China's patent No.: ZL 00 2 25482.4 patent cases, shown in Fig. 1 (D)), the proposition of this technology, really effectively improve the shortcoming (as producing in a large number, reduce cost and causing public hazards etc.) of conventional art, only, when the installing iron core coil structure, need to stick together with vertical, so still have the shortcoming of excessive height, utilization is performed in compact electronic product, has remained and has been subject to the space operational difficulties.

This shows that above-mentioned common structure and processing procedure thereof still have many shortcomings, real non-one perfect design, and demand urgently being improved.

The present patent application people is in view of the above-mentioned every shortcoming that can derive for the iron core coil structure and the manufacture method thereof of SMD use commonly used, be urgently to think to be improved innovation, and after concentrating on studies, successfully research and development finish this part can be for the iron core coil structure and the manufacture method thereof of SMD use.

Summary of the invention

Purpose of the present invention promptly is to provide a kind of iron core coil structure for the SMD use, two conducting terminals of this iron core coil structure, be to expose the horizontal symmetrical position of bending in iron core coil structure two ends insulating base, cause this iron core coil structure when being carried out the installing use, can flatly crouch and be installed with, with respect to the installing part of other cooperation, the planning in its installing space can be more flexible.

Another object of the present invention is the manufacture method that is to provide a kind of iron core coil structure that uses for SMD, by iron-core coil processing procedure provided by the present invention, not only can simplify the complicated fabrication steps of skill commonly used and produces in a large number.

A further object of the present invention is the manufacture method that is to provide a kind of iron core coil structure that uses for SMD, be that two ends are provided with the iron core cylinder of fluting and the collocation of conducting wire frame structure, take out by the manufacture method of encapsulation technology and stamping technology and to make the iron core coil structure that can use for SMD, can avoid using electroplating technology and reduce environmental pressure.

Can reach the iron core coil structure and the manufacture method thereof of Gong the SMD use of foregoing invention purpose, it is the fluting at two ends, the iron core cylinder left and right sides, be preset in the affixed terminal of the conducting strip position of two end symmetrical moulding on the lead frame, and by encapsulation technology, each moulding one insulating base at the two ends of iron core cylinder, and not the iron core cylinder of coated insulation seat at the coil two ends of twining conductive coil behind scolding tin, a Wound-rotor type inductance element that can provide surface mount technology (SMD) to use promptly is provided, and by iron-core coil processing procedure provided by the present invention, not only can simplify the complicated fabrication steps of skill commonly used and produce in a large number, and the present invention installing when using, and its installing space planning is then more flexible.

Iron core coil structure and manufacture method thereof for the SMD use provided by the present invention when comparing mutually with aforementioned other located by prior art, have more following advantage:

(1) according to the manufacture method of invention, processing procedure is simple and produce in a large number, can significantly reduce production costs.

(2) can avoid using electroplating technology and the harm that causes environment.

(3) characteristic that is not taken up space by iron core coil structure of the present invention can improve the flexibility ratio of associated electrical part configuration space.

Description of drawings

See also the detailed description and the accompanying drawing thereof of following relevant a preferred embodiment of the present invention, can further understand technology contents of the present invention and purpose effect thereof; The accompanying drawing of relevant this embodiment is:

Fig. 1 (A)～(D) is the structural representation of iron-core coil commonly used;

Fig. 2 (A) can be for the iron core coil structure three-dimensional view of SMD use for the present invention;

Fig. 2 (B) can be for the iron core coil structure decomposition view of SMD use for invention;

Fig. 3 (A)～(C) is the embodiment view of this iron core coil structure that can use for SMD;

Fig. 4 (A)～(B) implements illustration for the cooperation lead frame installing of the iron-core coil manufacture method that this can use for SMD;

Fig. 5 (A)～(D) can be for the iron-core coil manufacture method processing procedure view of SMD use for this; And

Fig. 6 is the Application Example view of this iron core coil structure that can use for SMD.

Among the figure 1 is the iron core cylinder, and 11 are fluting, and 12a is a baffle plate, 12b is a baffle plate, and 2 is conducting strip, and 21 is connection point terminal, 22 is conducting terminal, and 23 is affixed terminal, and 25 is the stop section, 3 is insulating base, and 4 is conductive coil, and 41 is end points, 42 is end points, and 5 is substrate, and 6 is lead frame manufacturing cell, 7 is the lead frame group, 8 iron core coil structures, and 81 is iron core, 811 is the bottom surface, and 812 is electrode, and 82 is coil, 821 is the end of a thread, 9 is iron core coil structure, and 91 is iron-core workpiece, and 92 is coil, 93 is pedestal, and 931 is electrode.

Embodiment

See also Fig. 2 (A) and reach (B),, constituted by an iron core cylinder 1, two conducting strips 2, two insulating bases 3 and a conductive coil 4 for the iron core coil structure that provides SMD to use of the present invention; On four end faces of this iron core cylinder 1 around being extended with two mutually

corresponding baffle plate

12a, 12b, make this baffle plate 12a, be formed with an accommodation space between 12b, and in post edge one side of two styletables, respectively offer a fluting 11, one end of this conducting strip 2 is a connection point terminal 21, the other end then elongation moulding has a conducting terminal 22, central authorities' one lateral edges place vertical extent, one affixed terminal 23 of this conducting terminal 22, and the visual demand extension in these conducting terminal 22 ends also is bent with a stop section 25, the affixed terminal of conducting terminal 22 central sides of this two conducting strip 2 23 cooperated insert in the set two styletables fluting 11 of this iron core cylinder 1, cause conducting terminal 22 opposite sides to be held in the baffle plate 12a of iron core cylinder 1, the 12b edge causes conducting strip 2 to be subjected to baffle plate 12a, the retaining of 12b is held and can not moved arbitrarily; 3 two ends that respectively are coated on iron core cylinder 1 respectively of this two insulating base, and only allow the conducting terminal 22 of two conducting strips 2 that place iron core cylinder 1 and the lateral margin that connection point terminal 21 exposes to insulating base 3, the line body of this conductive coil 4, can be wound in two baffle plate 12a of iron core cylinder 1, in the formed accommodation space of 12b, this accommodation space is not insulated 3 coatings of seat, and the two-end-

point

41 and 42 of this conductive coil 4, then be connected to the set connection point terminal 21 of two conducting strips 2, and can find out by Fig. 3 (A), this iron core coil structure in use, by the flat mode that crouches, with the technology that cooperates SMD in conjunction with on the substrate 5 (as circuit substrate etc.), can reduce area shared on substrate 5, even the present invention is when reality is used, the two-end-

point

41 and 42 of conductive coil 4 can be directly connected in the conducting terminal 22 (shown in Fig. 3 (B)) of two conducting strips 2, perhaps, two-end-

point

41 and 42 is connected to the connection point terminal 21 of one conducting strip 2 of two conducting strips 2 and the conducting terminal 22 (shown in Fig. 3 (C)) of another conducting strip 2, and makes overall permanence, the utilization in space is more flexible.

Please cooperate referring to Fig. 4 (A)～(B) and Fig. 5 (A)～(D), the present invention can be for the iron-core coil manufacture method of SMD use, at least need follow the following step finishes: step 1, affixed terminal 23 with the conducting strip 2 of 6 liang of end symmetrical moulding of lead frame manufacturing cell, embed in two flutings 11 of iron core cylinder 1, make conducting terminal 22 1 lateral edges of conducting strip 2 and the baffle plate 12a of

iron core cylinder

1,12b offsets, cause conducting strip 2 location can arbitrarily not slide, and the conducting terminal 22 that this conducting strip 2 is set, extensible and be bent with a stop section 25, step 2, the processing procedure that cooperates encapsulated moulding by mould, respectively form an insulating base 3 at the two ends of iron core cylinder 1, coat the two ends of iron core cylinder 1 by this insulating base 3, and only allow the conducting terminal 22 of conducting strip 2 and the lateral margin that connection point terminal 21 exposes to insulating base 3, when insulating base 3 encapsulation, the setting of stop section 25, the relative position between fastening position iron core cylinder 1 and the conducting strip 2 can be supported in stop section 25, make the encapsulation process of insulating base 3 not have displacement or the generation of disengaging condition shape between iron core cylinder 1 and the conducting strip 2, step 3, processing procedure by stamping technology, two ends are coated with the iron core cylinder 1 of insulating base 3, thrust by lead frame manufacturing cell 6, step 4, on the iron core cylinder 1 that is not coated with insulating base 3, twine conductive coil 4, and with the two-end-

point

41 and 42 of this conductive coil 4, be connected on the set connection point terminal 21 of two conducting strips 2, step 5, being the present invention can be for the iron core coil structure of SMD use; And what deserves to be mentioned is, manufacture method provided by the present invention, the iron core cylinder 1 that is provided with fluting 11 by two ends cooperates manufacturing with conducting wire frame structure, and conducting wire frame structure has the repetition elongation property, as the lead frame group 7 that forms side by side in a plurality of lead frame manufacturing cell 6 shown in Fig. 4 (A), so a large amount of when making iron core coil structure of the present invention, not only quick, the element application scope of being produced is wide, more can save cost.

Please referring to Fig. 6, embodiments of the invention application change, the conducting terminal 22 that conducting strip of the present invention 2 is set, do not need as above-mentioned extension and be bent with a stop section 25, and do not influence actual effect fruit of the present invention, so, not only can save manufacturing cost of the present invention, the change application of structure also can be extensively.

Above-listed detailed description is at the specifying of one of the present invention possible embodiments, and only this embodiment is not in order to limiting claim of the present invention, does not allly break away from the equivalence that skill spirit of the present invention does and implements or change, all should be contained in the claim of this case.

Claims

1. one kind can is characterized in that comprising at least for the iron core coil structure of SMD use:

One iron core cylinder, post edge one side of these iron core cylinder two styletables respectively offers a fluting;

Two conducting strips, an end of this conducting strip is a connection point terminal, and the other end then elongation moulding has a conducting terminal, and a lateral edges place vertical extent of this conducting terminal has affixed terminal, and this affixed terminal cooperates inserts in the set fluting of this iron core cylinder;

Two insulating bases, each is coated on the two ends of iron core cylinder respectively, and the lateral margin that only allows the conducting terminal that places iron core cylinder two conducting strips and connection point terminal expose to insulating base;

One conductive coil, this conductor wire astragal body, the iron core column that is wound between two insulating bases is external, and the two-end-point of this conductive coil then is connected to the set connection point terminal of two conducting strips.

2. by the described a kind of iron core coil structure that uses for SMD of claim 1, four end face rings that it is characterized in that this iron core cylinder are around being extended with two corresponding mutually baffle plates, support for conducting terminal one side of conducting strip, conducting strip is located can arbitrarily not move.

3. by the described a kind of iron core coil structure of claim 1, it is characterized in that the two-end-point of this conductive coil, then be connected to the set conducting terminal of two conducting strips for the SMD use.

4. by the described a kind of iron core coil structure of claim 1, it is characterized in that this conducting terminal Cheng Youyi stop section, by the relative position location of this stop section with two conducting strips and iron core cylinder for the SMD use.

5. by the described a kind of iron core coil structure of claim 1, it is characterized in that this connection point terminal exposes the horizontal symmetrical position of bending in iron core coil structure two ends insulating base for the SMD use.

6. by claim 1 or 2 described a kind of iron core coil structures, it is characterized in that this conductive coil is wound between the baffle plate of two correspondences on the iron core cylinder for the SMD use.

7. the manufacture method of the iron-core coil that can use for SMD is characterized in that comprising the following steps: at least

Step 1 with the affixed terminal of the conducting strip of lead frame manufacturing cell two end symmetrical moulding, embeds in two flutings of iron core cylinder;

Step 2 cooperates the encapsulated moulding processing procedure by mould, respectively forms an insulating base at the two ends of iron core cylinder, coats the two ends of iron core cylinder by this insulating base, and only allows the conducting terminal of conducting strip and the lateral margin that connection point terminal exposes to insulating base;

Step 3 by the stamping technology processing procedure, is coated with the iron core cylinder of insulating base with two ends, and manufacturing cell thrusts by lead frame;

Step 4 on the iron core cylinder that is not coated with insulating base, is twined conductive coil, and with the two-end-point of this conductive coil, is connected to the set connection point terminal of two conducting strips.

8. by the manufacture method of the described a kind of iron-core coil for SMD use of claim 7, it is characterized in that in this step 1, four end face rings of this iron core cylinder are around being extended with two mutually corresponding baffle plates, support for conducting terminal one side of conducting strip, and the conducting strip location can arbitrarily not moved.

9. by the manufacture method of the described a kind of iron-core coil for SMD use of claim 7, it is characterized in that in this step 4 that the two-end-point of this conductive coil is connected to the set conducting terminal of two conducting strips.

10. by the manufacture method of the described a kind of iron-core coil for SMD use of claim 7, it is characterized in that in this step 4 that the two-end-point of this conductive coil is connected to set conducting terminal of one conducting strip and the set connection point terminal of another conducting strip.