TWI677886B - Method of fabricating inductor - Google Patents

Abstract

This case discloses an inductive element and a method for manufacturing the same. The inductive element includes a core having a conductive coil embedded therein and an outer surface, a lead electrically connected to the conductive coil and passing through the core to extend along the outer surface of the core, And a shielding member having an accommodation space for covering the core and exposing the pins. According to this, the opening of the shielding member on one side of the accommodating space allows the core body to enter the accommodating space, and the baffle plates on the opposite side of the accommodating space can position the core body in the accommodating space, and two of the shielding member are welded The sheet has been bent on the bottom surface of the core body, so the core body does not need to be bent after the sleeve is accommodated in the accommodating space of the shielding member, thereby facilitating automatic design.

Description

Manufacturing method of inductance element

This case relates to an electronic component and a method for manufacturing the same, and more specifically, it relates to an inductor component and a method for manufacturing the same.

An inductive element is a passive electronic component that can store electrical energy in the form of magnetic flux. It will generate an electromotive force due to the change of the passing current, and thus resist the change of the current. This property is called inductance. Inductive components can have filtering and oscillating effects in the circuit, and also have electromagnetic interference, electromagnetic radiation shielding, and filtering noise in the current. Inductive components are used in a wide range of applications, including power supplies, monitors, switches, motherboards, scanners, telephones, modems, and more.

Generally speaking, the inductive element can include a coil and a magnetic material cover covering the coil. Such an inductive element is usually provided with a shielding structure to avoid the electronic components on the circuit board being affected by the electromagnetic radiation of the inductive element. A large shielding plate is set on the board to shield the electronic parts that need to be shielded on the circuit board, but the manufacturing process is complicated and it is not convenient for automated design.

Therefore, how to provide an inductive element that overcomes the aforementioned problems is an active research and development direction of the industry.

The present invention provides an inductive element including a core body having a conductive coil embedded therein and an outer surface; and a pin electrically connected to the conductive coil and extending from the core body to extend along the outer surface of the core body. And a shielding member having an accommodating space to cover the core body and exposing the pin, the shielding member includes openings and baffles located on opposite sides of the accommodating space for the core body to enter the opening through the opening. Hold the space and abut the tab.

The outer surface of the core includes a first side, a second side opposite to the first side, a third side connecting the first side and the second side, and a third side opposite to the third side and connecting the first side and A fourth side of the second side, a top surface connecting the first side, the second side, the third side, and the fourth side, opposite to the top surface and connecting the first side, the second side, A bottom surface of the third side surface and the fourth side surface.

The pin includes a first leg portion and a second leg portion, and the first leg portion and the second leg portion respectively penetrate from the first side surface and the second leg portion to extend along the first side surface and the first side portion, respectively. The two sides extend to the bottom surface and abut against the bottom surface, and the first leg portion is flush with the second leg portion.

The baffle abuts the first side or the second side.

The shielding member includes a cover sheet connected to the baffle sheet, a first extension sheet and a second extension sheet extending from opposite sides of the cover sheet, and first bends connected to the first extension sheet and the second extension sheet, respectively. Fold and second bend.

The cover sheet of the shielding member covers the top surface, the first extension sheet and the second extension sheet respectively cover the third side and the fourth side, and the first bent sheet and the second bent sheet abut to The bottom surface, and the first bent piece is flush with the second bent piece. The first bent piece and the second bent piece are separated from each other with a space for the first leg portion and the second leg portion extending to the bottom surface to be exposed from the space.

The shielding member further includes a first welding piece formed on the first bent piece and a second welding piece formed on the second bent piece, and the first welding piece and the second welding piece are bent on the core body. And the first welding piece is flush with the second welding piece.

The shield is integrally formed from a metal plate.

The present invention provides a method for manufacturing an inductive element, which includes: providing a core with embedded conductive coils and exposed pins, wherein the pins are electrically connected to the conductive coil and passed through the core to run along the core. The metal plate is integrally formed into a shielding member, so that the shielding member includes a receiving space, openings and baffles located on opposite sides of the receiving space; and the core body enters the receiving space through the opening. The space abuts against the baffle, so that the shielding member covers the core and exposes the pin.

Since the first and second bending pieces of the shielding member in this case extend from the first and second extension pieces to the bottom surface of the core body, respectively, so that the first and second welding pieces can be bent to the bottom surface of the core body. The core for this case can be directly inserted into the shielding without the need to bend the welding piece after the core is inserted, and the baffle of the shielding provides the positioning of the core. Therefore, the inductive element provided in this case and its manufacturing method Can facilitate automation design.

The following describes the implementation of this creation through specific embodiments. Those skilled in the art can easily understand other advantages and effects of this creation from the content disclosed in this article. It should be noted that the structures, proportions, sizes, etc. shown in the drawings in this manual are only used to match the contents disclosed in the manual for the understanding and reading of those skilled in this technology, and are not intended to limit the implementation of this creation. The limited conditions are not technically significant. Any modification of the structure, the change of the proportional relationship, or the adjustment of the size shall remain within the scope of this article without affecting the effects and goals that can be achieved by this creation. The technical content revealed by the creation must be within the scope.

Please refer to FIG. 1A and FIG. 1B. The inductive element in this case includes a core body 3 embedded with a conductive coil (not shown). The conductive coil is electrically connected and penetrates outward from the core body 3 along the core body 3. The lead 2 extending on the outer surface covers the core 3 and exposes the shielding member 4 of the lead 2.

2A to 2E, the outer surface of the core 3 includes a top surface 31, a first side surface 32 connected to the top surface 31, a second side surface 33 connected to the top surface 31 and opposite to the first side surface 32, and connected to The first side surface 32 and the second side surface 33 are opposite to the bottom surface 34 of the top surface 31, the third side surface (not labeled) connected to the top surface 31, the first side surface 32, the second side surface 33, and the bottom surface 34, and connected to the top surface The surface 31, the first side 32, the second side 33, and the bottom surface 34 are opposite to the fourth side 35 of the third side.

Generally speaking, the material of the core 3 can be, for example, iron, iron alloy, iron powder, iron alloy powder, ferrite, or other magnetic materials. Among them, the ferrite can be iron containing nickel zinc (NiZn) or manganese zinc (MnZn). An oxygen compound, and the iron alloy powder may include an iron-nickel-molybdenum alloy, an iron-aluminum-silicon alloy, or an iron-nickel alloy. In addition, the core body 3 can be formed by mixing and forming a magnetic material (such as one or more iron powders) and a non-magnetic material (such as an adhesive or a filler such as a resin), and at the same time, encapsulating the conductive coil therein and forming it integrally.

The pin 2 includes a first leg portion 21a and a second leg portion 21b. The first leg portion 21a and the second leg portion 21b are electrically connected to the conductive coil embedded in the core body 3, and respectively pass through the first side surface 32 and the second side surface 33 of the core body 3 and follow the first side surface. 32 and the second side surface 33 extend to the bottom surface 34 and are bent to abut the bottom surface 34. In addition, the first leg portion 21a and the second leg portion 21b are parallel to the bottom surface 34 of the core body 3, and the first leg portion 21a and the second leg portion 21b are flush with each other. The first leg portion 21 a and the second leg portion 21 b shown in FIGS. 2A to 2E are penetrated from opposite sides of the core body 3, but the present invention is not limited to this, and may be penetrated from the same side of the core body 3.

Referring to FIGS. 3A to 3E, the shielding member 4 includes a cover sheet 41, first and second extension sheets 42a and 42b extending downward from opposite sides of the cover sheet 41, and connected to the first and second extension sheets 42a and 42b, respectively. The first bending piece 43a and the second bending piece 43b of the two extension pieces 42b, the first welding piece 44a and the second welding piece 44b formed on the first bending piece 43a and the second bending piece 43b, respectively, and the self-covering The flap 41 extends downward, and the opening 46 is opposite to the flap 45.

The cover sheet 41, the first extension sheet 42a and the second extension sheet 42b, the first bending piece 43a and the second bending piece 43b, the first welding piece 44a and the second welding piece 44b, the stopper piece 45, and the opening 46 constitute The accommodating space is formed so that the shielding member 4 has a square shape. The opening 46 and the baffle 45 are respectively located on opposite sides of the accommodating space, and the first bending piece 43a and the second bending piece 43b are separated from each other. Without contact. In addition, generally speaking, the first extension piece 42a is flush with the second extension piece 42b, the first bent piece 43a is flush with the second bent piece 43b, and the first welding piece 44a and the second welding piece 44b are flush. . The shielding member 4 can be integrally formed by performing stamping or drawing on a metal plate.

Referring to FIGS. 4A to 4E, the shielding member 4 covers the core 3 and exposes the first leg portion 21 a and the second leg portion 21 b. The cover sheet 41 covers the entire top surface 31, the first extension sheet 42a covers all the third side surfaces, the first extension sheet 42b covers all the fourth side surfaces 35, the second side surface 33 of the covering portion 45, and the opening 46 exposes all The first side surface 32, the first bending piece 43a, and the second bending piece 43b extend from the first extension piece 42a and the second extension piece 42b to the bottom surface 34 and abut against the bottom surface 34, respectively, so that the core body 3 receives In the accommodation space of the shielding member 4. In addition, the first leg portion 21a may be exposed from the opening 46, and the second leg portion 21b is not covered by the stopper piece 45, and abuts between the first bent piece 43a and the second bent piece 43b of the bottom surface 34. The first leg portion 21a and the second leg portion 21b, which are also abutted against the bottom surface 34, can be exposed.

Figures 4A-4E show that the second side 33 abuts against the baffle 45, but this case is not limited to this, but the first side 32 abuts the baffle 45 and the opening 46 exposes the second side 33, so that the first extension The sheet 42a covers the fourth side surface 35 and the second extension sheet 42b covers the third side surface.

Please refer to FIG. 5. The manufacturing method of the inductive element in this case includes: in step S11, providing a core embedded with a conductive coil and an exposed pin, wherein the pin is electrically connected to the conductive coil and from the core. Perforate to extend along the outer surface of the core; in step S12, the metal plate is integrally formed into a shielding member, wherein the shielding member includes a receiving space, openings on opposite sides of the receiving space, and a baffle. And in step S13, the core body is made to enter the accommodating space from the opening and abut against the stopper, so that the shielding member covers the core body and exposes the pin.

To sum up, the shielding piece in this case has a mouth shape, the first and second bending pieces and the first and second welding pieces have been bent on the bottom surface, and the opening of the shielding piece allows the core body to enter the accommodation space. The baffle of the shielding member can locate the core in the accommodating space. Therefore, after the core is inserted into the shielding member, there is no need to bend the bending piece or the welding piece to the bottom surface, thereby facilitating automatic design.

The above implementation styles are only illustrative of the effectiveness of this creation, and are not intended to limit this creation. Anyone who is familiar with this technique can modify the above implementation styles without departing from the spirit and scope of this creation. And change. In addition, the number of structures in the above-mentioned embodiments is merely illustrative, and is not used to limit the creation. Therefore, the scope of protection of the rights of this creation shall be as listed in the scope of patent application mentioned later.

2‧‧‧ pins

21a‧‧‧first foot

21b‧‧‧Second foot

3‧‧‧ core

31‧‧‧Top

32‧‧‧ the first side

33‧‧‧ second side

34‧‧‧ underside

35‧‧‧ Fourth side

4‧‧‧shield

41‧‧‧ Overlay

42a‧‧‧First extension

42b‧‧‧Second extension

43a‧‧‧The first bending piece

43b‧‧‧The second bending piece

44a‧‧‧The first welding piece

44b‧‧‧Second welding piece

45‧‧‧ files

46‧‧‧ opening

S11 ~ S13‧‧‧‧steps

Figures 1A and 1B are the exploded and combined diagrams of the inductive element of the case; Figures 2A to 2E respectively show the cores of the inductor element at different angles in the case; and Figures 3A to 3E respectively show the inductance elements of the case in this case. A shielding member of different angles, wherein the angle of FIG. 3A corresponds to the angle of FIG. 2A, the angle of FIG. 3B corresponds to the angle of FIG. 2B, the angle of FIG. 3C corresponds to the angle of FIG. 2C, and the angle of FIG. 3D corresponds to The angle in Figure 2D and the angle in Figure 3E correspond to the angle in Figure 2E; Figures 4A to 4E show the inductor elements at different angles in this case, where the angle in Figure 4A corresponds to the angle in Figure 3A and 4B The angle of the figure corresponds to the angle of Figure 3B, the angle of Figure 4C corresponds to the angle of Figure 3C, the angle of Figure 4D corresponds to the angle of Figure 3D, and the angle of Figure 4E corresponds to the angle of Figure 3E; and Figure 5 This is a flowchart of the manufacturing method of the inductive element in this case.

Claims (8)

A method for manufacturing an inductive element includes: providing a core body embedded with a conductive coil and exposed pins, wherein the pin is electrically connected to the conductive coil and passed out of the core body along the outside of the core body; The surface extends; the metal plate is integrally formed into a shielding member so that the shielding member includes a receiving space, openings and baffles located on opposite sides of the receiving space; and the core enters the receiving space from the opening and Abutting to the stopper, the shielding member covers the core and exposes the pin. The manufacturing method according to item 1 of the scope of patent application, wherein the outer surface of the core includes a first side surface, a second side surface opposite to the first side surface, and a third side surface connecting the first side surface and the second side surface. , A fourth side opposite to the third side and connecting the first side and the second side, a top surface connecting the first side, the second side, the third side, and the fourth side, relative to the The top surface is connected to the bottom surface of the first side surface, the second side surface, the third side surface, and the fourth side surface. The method according to item 2 of the patent application scope, wherein the pin includes a first leg portion and a second leg portion, and the first leg portion and the second leg portion are respectively from the first side and the second leg portion. The side is penetrated to extend along the first side and the second side to the bottom surface and abut against the bottom surface, and the first leg portion is flush with the second leg portion. The method according to item 2 of the scope of patent application, wherein the baffle abuts against the first side or the second side. The manufacturing method according to item 2 of the scope of patent application, wherein the shielding member includes a cover sheet connected to the stopper sheet, a first extension sheet and a second extension sheet extending from opposite sides of the cover sheet, respectively connected to the cover sheet. The first bending piece and the second bending piece of the first extending piece and the second extending piece. The manufacturing method according to item 5 of the scope of patent application, wherein a cover sheet of the shielding member covers the top surface, the first extension sheet and the second extension sheet respectively cover the third side and the fourth side, and the first A bent piece and the second bent piece abut against the bottom surface, and the first bent piece is flush with the second bent piece. The manufacturing method according to item 5 of the scope of patent application, wherein the first bent piece and the second bent piece are separated from each other with a space for the first leg portion and the first leg portion extending to the bottom surface. Both feet are exposed from this space. The manufacturing method according to item 5 of the scope of patent application, wherein the shielding member further includes a first welding piece formed on the first bent piece and a second welding piece formed on the second bent piece, and the first A welding piece is flush with the second welding piece.