CN201188341Y - Surface mounting type inductor - Google Patents

Abstract

The utility model discloses a face installation type inductor, including having hollow coil's the hollow coil and two binding post of can shape magnetic core, two-way spiral that can hold hollow coil, be equipped with the incision portion on the lateral wall of can shape magnetic core, hollow coil's two lead ends are drawn forth and are connected a binding post respectively from the incision portion respectively, the lead end of incision portion is drawn forth the side and is equipped with the edge the peripheral extension that extends to the opposite side of can shape magnetic core. The utility model has the advantages that: the lead wire end stripping device has the advantages that the structure is simple, the assembly is easy, the critical part of the lead wire end stripping insulating layer is placed on the outer wall of the extending portion, the sufficient insulating distance is guaranteed, the interval between the wiring terminal and the inner coil is increased, the electric connectivity of the lead wire end and the wiring terminal is improved, the internal short circuit caused in the welding process is prevented, the welding reject ratio is reduced, the control of the assembly and the lead wire stripping process are facilitated, and the production efficiency and the product yield are improved.

Description

A Surface Mount Inductor

technical field

The utility model relates to an inductor, in particular to a surface-mounted inductor with a pot-shaped magnetic core structure.

Background technique

With the development of the electronics industry towards high integration, miniaturization, and low price, reducing the installation area of these components and modules, as well as the miniaturization and low price of the components themselves have become one of the means to reduce the volume and weight of terminal equipment. Taking the surface mount inductor as an example, one of them is composed of a pot-shaped magnetic core with a pit and an air-core coil. The pit inside the pot-shaped magnetic core can accommodate the air-core coil, and a cutout is provided on the end face. Connecting terminals are arranged on the side of the adjacent cutout, and the hollow coil is formed by winding a wire with an insulating layer on the surface. When the two lead ends of the air-core coil are drawn out from the cutout, one end must be connected to the terminal. During installation, the insulation layer of the two lead ends of the winding wire needs to be removed separately so that they can be electrically connected to the terminal respectively. sexual union. A common removal method is to use a laser to ablate the insulating layer. In order to ensure that the two lead ends of the winding wire after removing the insulation layer can be completely combined on the terminal, and do not make it close to the main body of the winding wire, the insulation layer of the lead wire outside the magnetic core will be burned when stripping. In the case of a small product, because the diameter of the winding wire used is very thin, it is difficult to ensure the accuracy of the burnt position in operation, especially in terms of accuracy, it is impossible to ensure that the lead end of which the insulation layer is removed falls completely outside the magnetic core. In general, the insulation layer may be removed too long, which reduces the insulation between the lead wire and the coil body, or the insulation layer may be removed too short, which reduces the electrical connectivity between the lead wire end and the terminal, and the defective product rate of the product is high. .

Contents of the invention

The purpose of the utility model is to provide a surface-mounted inductor with reliable connection, good insulation performance and high product quality rate.

The technical solution of the utility model is: a surface-mounted inductor, including a pot-shaped magnetic core capable of accommodating an air-core coil, an air-core coil with two-way winding wires and two terminals, and a side wall of the pot-shaped magnetic core is provided There is a cutout, and the two lead ends of the air-core coil are led out from the cutout respectively and respectively connected to a connecting terminal, and the lead end lead-out side of the cutout is provided with an extension extending along the periphery of the pot-shaped magnetic core to the other side.

After the lead end of the air-core coil is drawn out from the cutout, one lead end is drawn out along the winding direction, and the other lead end is drawn out against the winding direction. It can ensure a sufficient insulation distance between the lead end of the stripped insulation layer and the inside of the hollow coil, and at the same time, it can also ensure that the insulation layer at the electrical connection part of the terminal is completely stripped, which can fully guarantee the high-quality rate of the product.

The pot-shaped magnetic core includes a first pot-shaped magnetic core and a second pot-shaped magnetic core respectively having a pit capable of accommodating the air-core coil, and a first notch is provided on the side wall of the first pot-shaped magnetic core, A second cutout is provided on the side wall of the second pot-shaped magnetic core, and the two lead wire ends of the air-core coil are led out from the first cutout and the second cutout respectively and connected to one of the connecting terminals. In this way, when the first pot-shaped magnetic core and the second pot-shaped magnetic core are snapped together, the first notch and the second notch are arranged one above the other, and the two-way winding of the wire of the air-core coil also forms two layers, and the two lead ends Lead out from the first cutout and the second cutout respectively, so that at any cutout, the side wall of the pot-shaped magnetic core is used as the interval between the welding point and the other layer of coil, which can further prevent the insulation layer of the lead wire after welding It eliminates the hidden danger of internal short circuit caused by excessive length, improves safety, and can also reduce the difficulty of welding operation and assembly, facilitate operation and improve production efficiency.

The first notch and the second notch are staggered, and the optimal angle is 180°, which can ensure sufficient spacing, further improve the safety of welding and the welding strength of the product after it is installed on the printed circuit board, and at the same time It is also beneficial to the control of the process of stripping the insulating layer of the lead.

The bottom surfaces of the first pot-shaped magnetic core and the second pot-shaped magnetic core are respectively provided with grooves, and the connecting terminals are provided with protrusions matching with the grooves, so that the two pot-shaped magnetic cores can be connected easily by using the connecting terminals. The combination of magnetic cores is fixed, which simplifies the assembly process, improves the overall structural strength of the product, and facilitates transportation and storage.

The first pot-shaped magnetic core and the second pot-shaped magnetic core are octagonal pot-shaped magnetic pot cores with the same shape, which is convenient for production and simplifies the process.

The wire section of the air-core coil is circular or rectangular, and the existing film-coated wires are fully utilized and flexibly selected according to different uses and effects of inductors.

The utility model has the advantages of simple structure and easy assembly, and the critical part of the lead-out wire end stripped of the insulation layer is placed on the outer wall of the extension part, which ensures a sufficient insulation distance, increases the distance between the terminal and the internal coil, and improves It ensures the electrical connectivity between the lead end and the terminal, prevents internal short circuit caused during the welding process, reduces the welding defect rate, facilitates the control of the assembly and lead stripping process, and is conducive to improving production efficiency and product quality.

Description of drawings

Accompanying drawing 1 is the top view of the first pot-shaped magnetic core in the utility model embodiment;

Accompanying drawing 2 is the structural representation of the second pot-shaped magnetic core in the utility model embodiment;

Accompanying drawing 3 is the schematic diagram of the assembly structure of the inductor of the utility model embodiment;

Accompanying drawing 4 is the structural representation after the assembly of the utility model embodiment;

Accompanying drawing 5 is the schematic diagram of the structure after assembly under another angle of view of the embodiment of the utility model;

1. The first pot core, 2. The second pot core, 3. Air-core coil, 4. Connecting terminal, 5. Connecting terminal, 6. Dimple, 7. Insertion part, 8. First cutout part , 9, the second notch, 10, the groove, 11, the center hole, 12, the lead end, 13, the lead end, 14, the protrusion, 15, the clip pin, 16, the clip pin, 17, the extension.

Detailed ways

Example:

Referring to Figures 1 and 2, it is a schematic structural view of a first pot core 1 and a second pot core 2 of a surface-mounted inductor according to an embodiment of the present invention. The first pot core 1 and the second pot core The pot-shaped magnetic cores 2 are all octagonal in shape, and have a pit 6 inside, which can be used to install the air-core coil 3. The middle part of the pit 6 is provided with an insertion part 7, which is used to penetrate the central hole 11 in the middle of the air-core coil 3 .

The side wall of the first pot-shaped magnetic core 1 is provided with a first notch 8, and on the side where the lead end of the first notch 8 is drawn out, there is a wire extending along the periphery of the first pot-shaped magnetic core 1 to the other side. The extension part 17, in this way, if AA' is taken as the axis, the angles between the two sides of the first notch 8 and the AA' axis are α and β respectively, and α>β, the lead end of the air-core coil 3 12 protrudes from the β angle notch, and is combined with the terminal by soldering. The structure of the second pot core 2 is the same as that of the first pot core 1 .

Referring to FIG. 3 , it is a schematic diagram of the assembly structure of the surface-mounted inductor in the embodiment of the present invention. Among them, the surface-mounted inductor includes a first pot core 1 and a second pot core 2, an air-core coil 3 with two-way wound wires, and two terminals 4 and 5. The first pot core 1 The side wall is provided with a first notch 8, the lead end of the first notch 8 is provided with an extension 17, and the side wall of the second pot core 2 is provided with the first notch 8. Staggered second cutouts 9, in this embodiment, the first cutout 8 and the second cutout 9 are staggered by 180°; the bottom surfaces of the first pot core 1 and the second pot core 2 are respectively Provided with a groove 10;

The air-core coil 3 is a double-layer structure formed by bidirectional winding of wires coated with an insulating layer on the surface. The two lead ends 12 and 13 are drawn out from the upper and lower layers respectively and pass through the first cutout 8 and the second cutout respectively. 9 to the outside of the magnetic core, the part indicated by hatching is the part where the insulation layer has been stripped, and this part is used to electrically connect the terminals 4 and 5 respectively. The hollow coil 3 can be made by winding a conventional wire with a circular cross section, which is cheap and easy to obtain; it can also be made by winding a flat wire with a rectangular cross section, which is suitable for occasions where the installation height is limited.

The connection terminals 4 and 5 respectively have protrusions 14 matching with the grooves 10, and foldable crimping pins 15 and 16 are respectively arranged on them.

Referring to Fig. 4 and Fig. 5, it is a schematic diagram of the assembled structure under different angles of this embodiment, wherein after the first pot core 1 and the second pot core 2 are snapped together, the first cutout 8 and the second cutout The parts 9 are staggered by 180 degrees one by one, and the two lead ends 12 and 13 of the air-core coil 3 are also drawn out from the first cutout part 8 and the second cutout part 9 one by one, wherein the lead wire ends 12 are against the winding direction. Folding, the part on which the insulating layer is stripped is arranged on the outer wall of the extension part 17, and passes through the upwardly folded clamping pin 15 of the terminal 4, and after cutting off a longer part, it is welded and fixed on the clamping pin 15; The lead end 13 passes through the downwardly folded clip pin 16 of the terminal 5 along the winding direction, cuts off a longer part, and welds and fixes it on the clip pin 16; since the lead end 12 strips off the critical part of the insulating layer part It is located outside the pot-shaped magnetic core, and at the same time, the side wall of the pot-shaped magnetic core is used as the interval between each soldering point and the other layer of coils, which can prevent internal short-circuit hazards caused by excessively long lead wires after welding, improve safety, and also It can reduce the difficulty of stripping and welding operation and assembly, facilitate operation and improve production efficiency.

The above detailed description is a specific description for one of the feasible embodiments of the present utility model. This embodiment is not intended to limit the patent scope of the present utility model. Any equivalent implementation or change that does not deviate from the utility model shall include within the patent scope of this case.

Claims (7)

1, a kind of surface installation type inductor, comprise and have the jar shape magnetic core that can hold air core coil, air core coil and two binding posts of two-way spiral, the sidewall of jar shape magnetic core is provided with notch, two lead ends of air core coil are drawn and are connected a binding post respectively from notch respectively, it is characterized in that the lead end outlet side of described notch is provided with the extension that extends to opposite side along described jar of shape magnetic core periphery.

2, a kind of surface installation type inductor according to claim 1, it is characterized in that: described jar of shape magnetic core comprises first jar of shape magnetic core and the second jar of shape magnetic core that has the pit that can hold air core coil respectively, on the sidewall of first jar of shape magnetic core, be provided with first notch, be provided with second notch on the sidewall of second jar of shape magnetic core, two lead ends of described air core coil are drawn with second notch and are connected a described binding post respectively from first notch respectively.

3, a kind of surface installation type inductor according to claim 2 is characterized in that: the setting of staggering of described first notch and described second notch.

4, a kind of surface installation type inductor according to claim 3 is characterized in that: stagger 180 ° between described first notch and second notch.

5, a kind of surface installation type inductor according to claim 2, it is characterized in that: be respectively equipped with groove on the bottom surface of described first jar of shape magnetic core and second jar of shape magnetic core, described binding post is provided with the teat with this groove fit.

6, according to claim 2,3,4 or 5 described a kind of surface installation type inductors, it is characterized in that: described first jar of shape magnetic core is the identical octagon jar shape magnetic core of shape with described second jar of shape magnetic core.

7, a kind of surface installation type inductor according to claim 6 is characterized in that: the rounded or rectangle of the conductor cross-section of described air core coil.

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