Integrated combined inductor

Abstract

The utility model provides an integrated combined inductor. The integrated combined inductor is prepared by the following steps of: firstly, implanting a pre-manufactured shell into a mold; placing a copper sheet on the shell, and pressing the copper sheet into the shell through a mold; gluing the bottom of the magnetic core, and placing the glued magnetic core on the shell; the magnetic core is pressed into the shell through a mold, and the surface of the magnetic core is flush with the surface of the shell; dispensing at the contact part of the magnetic core and the shell, co-firing and curing, and combining to form a main body; the main body is polished and ground, so that the electrode position of the copper sheet, the surface of the magnetic core and the surface of the shell are located on the same plane, after the scheme is adopted, the shell, the copper sheet and the magnetic core are manufactured in a split mode, assembly line and continuous production can be achieved, the quality of accessories is easier to control, and the inductance value after combination is more stable.

Description

Technical Field

[0001] This utility model relates to the field of inductor manufacturing technology, and in particular to an integrated composite inductor. Background Technology

[0002] To meet the needs of modern communication, computers, audio-visual equipment, electronic office equipment, automotive electronic systems, and electromagnetic compatibility, co-fired inductor technology has achieved remarkable results, thus greatly promoting the development of miniaturized inductors. Traditional co-fired inductors (such as those with the announcement number CN1877761B) first apply glue to the pin holes of a nickel-zinc ferrite core, then insert the pins (electrodes) into the pin holes of the nickel-zinc ferrite core to make a nickel-zinc ferrite semi-finished product. The semi-finished product is then placed in a fixture and put into a drying device, where the glue, pins (electrodes), and ferrite core are bonded together by the drying device.

[0003] This type of inductor requires additional bonding pins (electrodes) after molding to form the circuit, which increases its overall size. Furthermore, the pins (electrodes) are directly attached to the magnet with glue, leaving some gaps between them and the magnet, thus increasing the inductor's size. In addition, the surface of the pins (electrodes) may be uneven, which will affect the reliability of the circuit and the size of the power module, resulting in low power density and poor soldering reliability. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated combined inductor with a reasonable structure, good performance, and strong stability.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows: an integrated composite inductor, comprising a housing, copper sheets, and a magnetic core, wherein the top of the housing is provided with a recessed magnetic core chamber, the side walls of the housing at both ends of the magnetic core chamber are provided with recessed side copper sheet grooves, the bottom of the housing at the bottom of the magnetic core chamber is provided with a recessed bottom copper sheet groove, the end of the bottom copper sheet groove is connected to the side copper sheet groove, the top of the housing at both ends is provided with recessed electrode grooves, the inner end of the electrode groove is connected to the top of the side copper sheet groove, the copper sheets are embedded in the bottom copper sheet groove, the side copper sheet groove, and the electrode groove, and the magnetic core is embedded in the magnetic core chamber.

[0006] The copper sheet body is U-shaped, with the top of its two side walls bent outward horizontally to form electrode positions. The bottom of the copper sheet is embedded in the bottom copper sheet groove, and the two side walls of the copper sheet are respectively embedded in the corresponding side copper sheet grooves. The electrode positions are embedded in the electrode grooves.

[0007] The bottom of the magnetic core is provided with an adhesive layer, and the bottom of the magnetic core is connected to the bottom of the copper sheet and the bottom of the magnetic core chamber through the adhesive layer.

[0008] The top of the housing has raised air gap steps in all four directions, and the electrode surface of the copper sheet is flush with the surface of the air gap step.

[0009] The magnetic core has a recessed air gap groove at the top, the bottom of the air gap groove is flush with the top surface of the shell, and the top of the magnetic core is flush with the surface of the air gap step.

[0010] After adopting the above-mentioned solution, the inductor is combined with the shell, copper sheet and magnetic core, and then sintered and fixed after assembly. When the separate manufacturing is adopted, it can realize assembly line and continuous production, the quality of the components is easier to control, and the inductance value after assembly is more stable. Using copper sheet instead of coil, its manufacturing process is simpler, no winding is required, and copper sheet can be directly pressed (bent) into shape, without the need for electrode metallization process, which greatly reduces the difficulty of the process; moreover, the contact surface of copper sheet is larger, and the performance is better. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0012] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0013] Figure 3 This is a schematic diagram showing the disassembled parts of this utility model. Detailed Implementation

[0014] The present invention will be further described below with reference to all the accompanying drawings. The preferred embodiment of the present invention is as follows:

[0015] The embodiments described in this paper with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0016] In the description of this patent, it should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.

[0017] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0018] See appendix Figure 1 To be continued Figure 3The integrated combined inductor described in this embodiment includes the following steps:

[0019] First step: Insert the pre-made shell into the mold;

[0020] The second step: Place the copper sheet onto the shell and press it into the shell using a mold;

[0021] Third step: Apply glue to the bottom of the magnetic core. The glue thickness should be 0.01-0.08mm. Place the glued magnetic core onto the housing.

[0022] Step 4: Press the magnetic core into the housing using a mold. After the magnetic core is pressed in, the glue is spread outwards and seeps into the gap between the magnetic core and the housing, so that the bottom of the magnetic core contacts the surface of the copper sheet and the bottom of the housing; this is to prevent the magnetic core from loosening.

[0023] Fifth step: After the magnetic core is glued in place, glue is applied to fix the magnetic core and the shell in four directions, and then co-fired to cure. The assembled parts form the main body.

[0024] Step 6: Polish and grind the main body to make the electrode positions of the copper sheet, the surface of the magnetic core, and the surface of the shell on the same plane.

[0025] The inductor prepared according to the above method includes a housing 1, a copper sheet 2, and a magnetic core 3. The top of the housing 1 has a recessed magnetic core chamber 4. The side walls of the housing 1 at both ends of the magnetic core chamber 4 have recessed side copper sheet grooves 6. The bottom of the housing 1 at the bottom of the magnetic core chamber 4 has a recessed bottom copper sheet groove 7, the end of which connects to the side copper sheet grooves 6. The top of the housing 1 has recessed electrode grooves 5 at both ends, the inner end of which connects to the top of the side copper sheet grooves 6. The copper sheet 2 is embedded in the bottom copper sheet groove 7, the side copper sheet grooves 6, and the electrode grooves 5. The magnetic core 3 is embedded in the magnetic core chamber 4. The main body of the copper sheet 2 is U-shaped, with the top of its two side walls bent outwards horizontally to form electrode positions. The bottom of the copper sheet 2 is embedded in the bottom copper sheet groove 7, and the two side walls of the copper sheet 2 are respectively embedded in the corresponding side copper sheet grooves 6. The electrode positions are embedded in the electrode grooves 5. The bottom of the magnetic core 3 is provided with an adhesive layer 8, which connects the bottom of the magnetic core 3 to the bottom of the copper sheet 2 and the bottom of the housing 1 of the magnetic core chamber 4. The top of the housing 1 has raised air gap steps 9 in four directions, and the electrode surfaces of the copper sheet 2 are flush with the surfaces of the air gap steps 9. The top of the magnetic core 3 has a recessed air gap groove 10, the bottom of which is flush with the top surface of the housing 1, and the top of the magnetic core 3 is flush with the surface of the air gap steps 9.

[0026] By using air gaps, the heat generated during inductor use can be directly dissipated through the air gaps, thereby reducing the heat on the circuit board. The inductor is assembled from a housing, copper sheet, and magnetic core, and then sintered to fix it. When manufactured in a separate manner, it can achieve assembly line and continuous production, making it easier to control the quality of components. The inductance value after assembly is more stable. Using copper sheets instead of coils simplifies the manufacturing process, eliminating the need for winding. Copper sheets can be directly pressed (bent) into shape, eliminating the need for electrode metallization, which greatly reduces the difficulty of the process. Moreover, the contact surface of the copper sheets is larger, resulting in better performance.

[0027] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all changes made in accordance with the shape and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. An integrated composite inductor, characterized in that: It includes a housing (1), copper sheets (2), and a magnetic core (3). The top of the housing (1) is provided with a recessed magnetic core chamber (4). The side walls of the housing (1) at both ends of the magnetic core chamber (4) are provided with recessed side copper sheet grooves (6). The bottom of the housing (1) at the bottom of the magnetic core chamber (4) is provided with a recessed bottom copper sheet groove (7). The end of the bottom copper sheet groove (7) is connected to the side copper sheet groove (6). The top two ends of the housing (1) are provided with recessed electrode grooves (5). The inner end of the electrode groove (5) is connected to the top of the side copper sheet groove (6). The copper sheet (2) is embedded in the bottom copper sheet groove (7), the side copper sheet groove (6), and the electrode groove (5). The magnetic core (3) is embedded in the magnetic core chamber (4).

2. The integrated combined inductor according to claim 1, characterized in that: The copper sheet (2) is U-shaped, with the top of its two side walls bent outward to form electrode positions. The bottom of the copper sheet (2) is embedded in the bottom copper sheet groove (7), and the two side walls of the copper sheet (2) are respectively embedded in the corresponding side copper sheet grooves (6). The electrode positions are embedded in the electrode grooves (5).

3. The integrated combined inductor according to claim 1, characterized in that: The bottom of the magnetic core (3) is provided with an adhesive layer (8), and the bottom of the magnetic core (3) is connected to the bottom of the copper sheet (2) and the shell (1) at the bottom of the magnetic core chamber (4) through the adhesive layer (8).

4. An integrated combined inductor according to claim 1, characterized in that: The top of the housing (1) is provided with raised air gap steps (9) in four directions, and the electrode surface of the copper sheet (2) is flush with the surface of the air gap step (9).

5. An integrated combined inductor according to claim 1, characterized in that: The top of the magnetic core (3) is provided with a recessed air gap groove (10), the bottom of the air gap groove (10) is flush with the top surface of the shell (1), and the top of the magnetic core (3) is flush with the surface of the air gap step (9).

Images