Inductor and manufacturing method thereof

Abstract

The invention provides an inductor which comprises a magnetic core, an upper shell and a lower shell, the magnetic core comprises a magnetic ring, a shell and a coil, pins are formed at the two ends of the coil, anti-loosening parts are arranged on the pins, the pins penetrate through the upper shell after the magnetic core is placed in the upper shell, and injection molding is conducted on the pins to form the lower shell. According to the inductor, after the magnetic ring is placed in the outer shell, the coil is wound in the outer shell, the pin extends into and penetrates through the upper shell, the pin is subjected to injection molding to form the lower shell, the lower shell and the upper shell after injection molding form a whole, and the pin after injection molding is not prone to loosening due to the effect of the anti-loosening part. Therefore, the pins can be effectively prevented from being separated from the lower shell, meanwhile, the step of dispensing the coil or the magnetic ring is omitted, and the pins are connected in the lower shell more stably.

Description

Technical Field

[0001] The present invention relates to the technical field of inductor manufacturing, and in particular to an inductor and a manufacturing method of the inductor. Background Art

[0002] An inductor can be made of a conductive material wound around a magnetic core, typically copper wire. The inductor can also remove the magnetic core or replace it with a ferromagnetic material. A core material with a higher magnetic permeability than air can confine the magnetic field more tightly around the inductor element, thereby increasing the inductance. The main function of the inductor is to isolate and filter the AC signal or form a resonant circuit with capacitors, resistors, etc. In the prior art, the inductor is formed by integrally injecting the upper shell and the lower shell, and then extending the pins from the upper shell into the lower shell. The inductor installed in this way requires the coil and the magnetic ring to be fixed by glue, and the pins and the magnetic ring connected in the shell by glue are easy to loosen.

[0003] Therefore, it is necessary to provide an inductor and a method for manufacturing the inductor to solve the above technical problems. Summary of the invention

[0004] The invention provides an inductor and a method for manufacturing the inductor, which solves the problem that the method of fixing the pins on the lower shell and the magnetic ring on the upper shell by glue dispensing in the prior art easily causes the pins and the magnetic ring to loosen.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: an inductor, including a magnetic core, an upper shell and a lower shell, the magnetic core includes a magnetic ring, a shell wrapping the magnetic ring and a coil wound in the shell, the two ends of the coil form pins, and the pins are provided with anti-loosening parts. After the magnetic core is placed in the upper shell, the pins pass through the upper shell, and the pins are injection molded to form the lower shell.

[0006] In the present invention, the anti-loosening portion is a U-shaped structure.

[0007] In the present invention, the anti-loosening portion is a convex structure.

[0008] In the present invention, the peripheral side of the shell is an R-angle structure.

[0009] In the present invention, the coils are provided in two groups.

[0010] In the present invention, the magnetic core is further provided with a chip located in the shell.

[0011] In the present invention, a symmetrical card slot is also provided on the inner side of the shell, and the chip is carded in the card slot.

[0012] A method for manufacturing an inductor, including the inductor described above, comprises the following manufacturing steps:

[0013] Installing the magnetic ring in the housing to form assembly one;

[0014] The coil is wound on the first assembly, two ends of the coil form pins, and a loosening prevention portion is made in the middle area of ​​the pins to form a second assembly;

[0015] Put the second assembly into the upper housing, and pass the pins through the upper housing to form a third assembly;

[0016] The pins of the assembly three are wrapped by injection molding to form the lower shell which is integrated with the upper shell to obtain an inductor.

[0017] In the present invention, before placing the second assembly into the upper housing and passing the pins through the upper housing to form the third assembly, the method further includes:

[0018] The middle area of ​​the pin is bent to form a U-shaped structure.

[0019] In the present invention, before placing the second assembly into the upper housing and passing the pins through the upper housing to form the third assembly, the method further includes:

[0020] A convex structure is formed by pressing the middle area of ​​the pin.

[0021] Compared with the prior art, the present invention has the following beneficial effects: the inductor and the method for making the inductor of the present invention, after placing the magnetic ring in the shell and winding the coil in the shell, the pins are extended into and pass through the upper shell, and the pins are injection molded to form the lower shell. After the injection molding, the lower shell and the upper shell form a whole. After the injection molding, the pins can be effectively prevented from being separated from the lower shell due to the effect of the anti-loosening part. At the same time, the step of gluing the coil or the magnetic ring is omitted, so that the pin connection in the lower shell is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the present invention.

[0023] Figure 1 FIG. 4 is a three-dimensional diagram of the inductor of the present invention.

[0024] Figure 2 FIG. 4 is an exploded view of the inductor of the present invention.

[0025] Figure 3 Schematic diagram of the inductor of the present invention Figure 1 .

[0026] Figure 4 Schematic diagram of the inductor of the present invention Figure 2.

[0027] Figure 5 It is a schematic diagram of an embodiment of a method for manufacturing an inductor of the present invention.

[0028] 11. Shell; 12. Coil; 13. Upper shell; 14. Lower shell; 15. Pins; 16. Chip; 17. Magnetic ring; 18. U-shaped structure; 19. Raised structure; 111. Card slot. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0030] Unless otherwise defined, technical or scientific terms used herein shall have the common meanings understood by one of ordinary skill in the art to which the present disclosure belongs.

[0031] The words "first", "second" and similar words used in the patent application specification and claims of this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0033] The following is a preferred embodiment of a method for manufacturing an inductor and an inductor manufactured using the method, which can solve the above technical problems, provided by the present invention.

[0034] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 1 is a three-dimensional diagram of the inductor of the present invention, Figure 2 is an exploded view of the inductor of the present invention, Figure 3 Schematic diagram of the inductor of the present invention Figure 1 , Figure 4 Schematic diagram of the inductor of the present invention Figure 2 .

[0035] In the figures, structurally similar elements are denoted by the same reference numerals.

[0036] The terms "first", "second", etc. in the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance, and should not be used as a limitation on the order of precedence.

[0037] An inductor includes a magnetic core, an upper shell 13 and a lower shell 14. The magnetic core includes a magnetic ring 17, a shell 11 wrapping the magnetic ring 17 and a coil 12 wound in the shell 11. Pins 15 are formed at both ends of the coil 12. The pins 15 are provided with anti-loosening parts. After the magnetic core is placed in the upper shell 13, the pins 15 pass through the upper shell 13. The pins 15 are injection molded to form the lower shell 14. First, the magnetic ring 17 is installed in the shell 11, and the coil 12 is wound around the shell 11. Further, the two ends of the coil 12 wound in the shell 11 are The pin 15 at the end extends from the upper shell 13, and the pin 15 passes through the upper shell 13, and the magnetic core is installed in the upper shell 13. Finally, the pin 15 is injection molded to make the plastic wrap around the pin 15 to form the lower shell 14. At the same time, the lower shell 14 can be formed into a whole with the upper shell 13 by injection molding. The pin 15 can be firmly fixed in the lower shell 14 by the injection molding of the lower shell 14 to prevent the pin 15 from loosening in the lower shell 14. At the same time, it also saves the need to dispense glue on the magnetic ring 17, and can also effectively prevent the magnetic ring 17 from separating from the upper shell 13.

[0038] The anti-loosening part is a U-shaped structure 18 , and the anti-loosening part of the U-shaped structure 18 is interlocked with the plastic in the lower shell 14 , thereby effectively preventing the pin 15 from shaking in the lower shell 14 , so that the pin 15 can be firmly fixed in the shell.

[0039] The anti-loosening part is a protrusion structure 19 , and the pin 15 of the protrusion structure 19 can form an interlocking relationship with the plastic in the lower shell 14 after injection molding, which can effectively prevent the pin 15 from shaking in the shell, so that the pin 15 can be firmly fixed in the lower shell 14 .

[0040] The peripheral side of the shell 11 is an R-angle structure, and the shell 11 can effectively protect the coil 12, so that the coil 12 is not damaged when winding, and can effectively prevent the problem of the coil 12 being broken when winding.

[0041] Two groups of coils 12 are provided, and pins 15 are formed at both ends of the two coils 12. Providing two groups of coils 12 can effectively increase the magnetic field strength of the inductor. The magnetic fields generated by the two groups of coils 12 can be superimposed on each other, thereby improving the overall magnetic field strength.

[0042] The magnetic core is also provided with a chip 16 located in the housing 11. The inner side of the housing 11 is also provided with a symmetrical card slot 111. The chip 16 is carded in the card slot 111. The chip 16 is used to store and convert electrical energy. The card slot 111 is used to fix the chip 16 and install the chip 16 in the housing 11 to prevent the chip 16 from shaking in the housing.

[0043] Embodiment 1:

[0044] When making the inductor, first, assemble the magnetic ring 17 in the shell 11, and place the assembled magnetic ring 17 shell 11 and the coil 12 in the winding equipment, and the winding equipment winds the coil 12 on the shell 11. The coil 12 is wound with two, which are respectively located on both sides of the shell 11. The two ends of the coil 12 form pins 15, and the middle position of the pin 15 is bent or squeezed to form an anti-loosening part in the middle position of the pin 15. The pin 15 is extended into the upper shell 13 and passes through the upper shell 13, and the shell 11 is assembled in the upper shell 13, and the pin 15 is injection molded to form the lower shell 14. The lower shell 14 forms a whole with the lower shell 14 during the injection molding. Due to the effect of the anti-loosening part, the pin 15 can be stably connected to the lower shell 14 to prevent the pin 15 from separating from the lower shell 14. At the same time, it also saves the need to dispense glue on the coil 12 or the shell 11. Finally, assemble the chip 16 in the card slot 111.

[0045] Please refer to Figure 5 , Figure 5 It is a schematic diagram of an embodiment of a method for manufacturing an inductor of the present invention.

[0046] A method for manufacturing an inductor, comprising the inductor and the following manufacturing steps:

[0047] 101. Install the magnetic ring in the housing to form assembly 1;

[0048] 102. Wind the coil on the first assembly, form pins at both ends of the coil, and make an anti-loosening portion in the middle area of ​​the pins to form a second assembly;

[0049] 103. Place the second assembly into the upper housing, and pass the pins through the upper housing to form a third assembly;

[0050] 104. Injection-molding is performed on the pins of the assembly three to form the lower shell that is integrated with the upper shell to obtain an inductor.

[0051] In this embodiment, the magnetic ring 17 is installed in the shell 11 to form an assembly one, the coil 12 is wound on the assembly one, the two ends of the coil 12 form pins 15, and an anti-loosening portion is made for the middle area of ​​the pin 15 to form an assembly two. The assembly two is placed in the upper shell 13, and the pin 15 passes through the upper shell 13 to form an assembly three. The pin 15 of the assembly three is injection-molded to form a lower shell 14 that is integrated with the upper shell 13 to obtain an inductor.

[0052] Before placing the second assembly into the upper housing 13 and passing the pins 15 through the upper housing 13 to form the third assembly, the middle area of ​​the pins 15 is bent to form a U-shaped structure 18 .

[0053] Before placing the second assembly into the upper shell 13 and passing the pins 15 through the upper shell 13 to form the third assembly, the process further includes: pressing the middle area of ​​the pins 15 to form a protruding structure 19 .

[0054] Embodiment 2:

[0055] The magnetic ring 17 is installed in the shell 11 to form a combination 1, and the combination 1 and the coil 12 are placed in a winding device. The winding device winds the coil 12 on the shell 11. The coil 12 is wound with two, which are respectively located on both sides of the shell 11. Pins 15 are formed at both ends of the coil 12. The middle position of the pin 15 is bent or squeezed to form an anti-loosening portion at the middle position of the pin 15 to form a combination 2. The pin 15 is extended into the upper shell 13 and passes through the upper shell 13, and the shell 11 is placed in the upper shell 13 to form a combination 3. The pin 15 is injection molded to form a lower shell 14. The lower shell 14 forms a whole with the lower shell 14 during injection molding to obtain an inductor. Due to the effect of the anti-loosening portion, the pin 15 can be stably connected to the lower shell 14 to prevent the pin 15 from separating from the lower shell 14. At the same time, it also saves the need to dispense glue on the coil 12 or the shell 11. Finally, the two ends of the chip 16 are snapped into the card slot 111.

[0056] The inductor of this preferred embodiment is manufactured by placing a magnetic ring in a shell, winding a coil in the shell, extending a pin into and passing through an upper shell, and performing injection molding on the pin to form a lower shell. After injection molding, the lower shell and the upper shell form a whole. After injection molding, the pin can be effectively prevented from being separated from the lower shell due to the anti-loosening part. At the same time, the step of gluing the coil or the magnetic ring is omitted, so that the pin connection in the lower shell is more stable.

[0057] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. An inductor, characterized in that: It includes a magnetic core, an upper shell and a lower shell. The magnetic core includes a magnetic ring, a shell that wraps the magnetic ring and a coil wound in the shell. Pins are formed at both ends of the coil. Anti-loosening parts are provided on the pins. After the magnetic core is placed in the upper shell, the pins pass through the upper shell, and the pins are injection molded to form the lower shell.

2. The inductor according to claim 1, characterized in that: The anti-loosening portion is a U-shaped structure.

3. The inductor according to claim 1, characterized in that: The anti-loosening portion is a convex structure.

4. The inductor according to claim 1, characterized in that: The peripheral side of the shell is an R-angle structure.

5. The inductor according to claim 1, characterized in that: The coils are provided in two groups.

6. The inductor according to claim 1, characterized in that: The magnetic core is also provided with a chip located in the housing.

7. The inductor according to claim 6, characterized in that: A symmetrical card slot is also provided on the inner side of the shell, and the chip is carded in the card slot.

8. A method for manufacturing an inductor, characterized in that: The inductor according to any one of claims 1 to 7 comprises the following manufacturing steps: Installing the magnetic ring in the housing to form assembly one; The coil is wound on the first assembly, two ends of the coil form pins, and a loosening prevention portion is made in the middle area of ​​the pins to form a second assembly; Put the second assembly into the upper housing, and pass the pins through the upper housing to form a third assembly; The pins of the assembly three are wrapped by injection molding to form the lower shell which is integrated with the upper shell to obtain an inductor.

9. The method for manufacturing an inductor according to claim 8, characterized in that: Before placing the second assembly into the upper housing and passing the pin through the upper housing to form the third assembly, the method further includes: The middle area of ​​the pin is bent to form a U-shaped structure.

10. The method for manufacturing an inductor according to claim 8, characterized in that: Before placing the second assembly into the upper housing and passing the pin through the upper housing to form the third assembly, the method further includes: A convex structure is formed by pressing the middle area of ​​the pin.

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