TW202001947A - Method of fabricating inductor - Google Patents

Abstract

An inductor and a method of fabricating the same are disclosed. The inductor includes: a core having a conductive coil embedded therein and an outer surface thereof; leads electrically connected to the conductive coil, protruding from the core, and extending along the outer surface of the core; and a shield having a receiving space and covering the core, with the leads exposed from the shield. An opening of the shield disposed on one side of the receiving space allows the core to enter the receiving space. A barrier clip of the shield disposed on the other side of the receiving space positions the core in the receiving space. The shield has two welding pieces that are bent and disposed on a bottom surface of the core. As the core is mounted into the receiving space of the shield, it is no necessary to bend the welding pieces any further, to realize an automation design.

Description

Inductive component and its manufacturing method

This case is about an electronic component and its manufacturing method. In detail, it is about an inductive component and its manufacturing method.

The inductive component 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, thereby resisting the change of the current. This property is called inductance. Inductive components can have filtering and oscillation effects in the circuit, and also have the functions of electromagnetic wave interference, electromagnetic radiation shielding, and filtering noise in the current. Inductive components have a wide range of applications, including power supplies, monitors, switches, motherboards, scanners, telephones, and modems.

Generally speaking, the inductance element may include a coil and a magnetic material cover covering the coil. Such an inductance element is usually provided with a shielding structure to prevent the electronic parts on the circuit board from being affected by the electromagnetic radiation of the inductance element, for example, in a circuit A large shielding board is provided 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 automatic design.

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

The present case provides an inductance element including a core body having a conductive coil embedded in the outer surface and a pin; a pin electrically connecting the conductive coil and extending from the core body to extend along the outer surface of the core body And a shielding member, which has an accommodating space to cover the core body and expose the pin, and the shielding member includes openings and baffles on opposite sides of the accommodating space for the core body to enter the opening from the opening Accommodate the space and lean against the stopper.

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

The pin includes a first foot portion and a second foot portion, and the first foot portion and the second foot portion respectively pass through the first side surface and the second side surface to respectively follow the first side surface and the second side surface The two side surfaces 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 a first bend connected to the first extension sheet and the second extension sheet, respectively Folding piece and second bending piece.

The cover sheet of the shielding member covers the top surface, the first extension sheet and the second extension sheet cover the third side and the fourth side respectively, and the first bending sheet and the second bending sheet abut to The bottom surface, and the first bending piece is flush with the second bending piece. The first bending piece and the second bending piece are separated to have 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 bending piece and a second welding piece formed on the second bending piece, the first welding piece and the second welding piece are bent to the core body And the first welding piece is flush with the second welding piece.

The shielding member is formed integrally by a metal plate.

This case provides a method for manufacturing an inductive element, which includes: providing a core body embedded with a conductive coil and exposed pins, wherein the pin is electrically connected to the conductive coil and passes out from the core body to follow the core body The outer surface of the extension extends; the metal plate is integrally formed into a shield so that the shield includes the accommodating space, openings and baffles on opposite sides of the accommodating space; and the core body enters the accommodating space from the opening The space is pressed 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 piece of this case extend from the first and second extension pieces to the bottom surface of the core body, 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 shield without bending the welding piece after the core is inserted, and the shielding piece of the shield also provides the positioning of the core, so the inductance element provided in this case and its manufacturing method Can facilitate automated design.

The following describes the implementation of the creation by specific specific examples. Those skilled in the art can easily understand other advantages and effects of the creation by the content disclosed in this article. It should be noted that the structure, ratio, size, etc. shown in the drawings of this specification are only used to match the contents disclosed in the specification, for those who are familiar with this skill to understand and read, not to limit the creation of this creation. The limited conditions, so it does not have the technical significance, any modification of structure, change of proportional relationship or adjustment of size, should not fall within the original without affecting the effect and the purpose of this creation. The technical content revealed by the creation must be within the scope.

Please refer to FIGS. 1A and 1B. The inductance element in this case includes a core 3 embedded with a conductive coil (not shown), electrically connected to the conductive coil and passing out from the core 3 to extend along the core 3 The pin 2 extending on the outer surface covers the core 3 and exposes the shield 4 of the pin 2.

Please refer to FIGS. 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, 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 face 31, the first side 32, the second side 33, and the bottom 34 are opposite to the fourth side 35 of the third side.

Generally speaking, the material of the core 3 may be, for example, iron, iron alloy, iron powder, iron alloy powder, ferrite or other magnetic materials, wherein the ferrite may be iron containing nickel zinc (NiZn) or manganese zinc (MnZn) Oxygen compound, and the iron alloy powder may include iron nickel molybdenum alloy, iron aluminum silicon alloy, or iron nickel alloy. In addition, the core body 3 can be formed by mixing a magnetic material (such as one or more iron powders) and a non-magnetic material (such as an adhesive or filler such as resin), and at the same time covering the conductive coil to form an integrated body.

The pin 2 includes a first leg 21a and a second leg 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 extend from the first side surface 32 and the second side surface 33 of the core body 3 along the first side surface, respectively 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 21a and the second leg 21b are parallel to the bottom surface 34 of the core 3, and the first leg 21a and the second leg 21b are flush. The first leg portion 21a and the second leg portion 21b shown in FIGS. 2A-2E are penetrated from opposite sides of the core body 3, but the case is not limited to this, and can also be penetrated from the same surface of the core body 3.

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

The cover piece 41, the first extension piece 42a and the second extension piece 42b, the first bending piece 43a and the second bending piece 43b, the first welding piece 44a and the second welding piece 44b, the baffle piece 45, and the opening 46 are formed The accommodating space, so that the shielding member 4 is shaped like a mouth, the opening 46 and the baffle piece 45 are located on opposite sides of the accommodating space, respectively, and the first bending piece 43a is separated from the second bending piece 43b Without contact. In addition, generally speaking, the first extending piece 42a and the second extending piece 42b are flush, the first bending piece 43a and the second bending piece 43b are flush, and the first welding piece 44a and the second welding piece 44b are flush . The shield 4 can be integrally formed by performing stamping or drawing on a metal plate.

Referring to FIGS. 4A to 4E, the shield 4 covers the core 3 and exposes the first leg 21a and the second leg 21b. The cover sheet 41 covers the entire top surface 31, the first extension sheet 42a covers the entire third side surface, the first extension sheet 42b covers the entire fourth side surface 35, the baffle sheet 45 covers the portion of the second side surface 33, and the opening 46 is exposed 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, so that the core body 3 is accommodated In the accommodating space of the shielding member 4. In addition, the first leg portion 21a can be exposed from the opening 46, and the second leg portion 21b is not covered by the baffle 45, and rests between the first bending piece 43a and the second bending piece 43b of the bottom surface 34 The distance between the two allows the first leg portion 21a and the second leg portion 21b that are also against the bottom surface 34 to be exposed.

4A-4E shows that the second side 33 abuts the stopper 45, but the case is not limited to this, the first side 32 can also abut the stopper 45 and the opening 46 exposes the second side 33, so that the first extension The sheet 42a covers the fourth side 35 and the second extension sheet 42b covers the third side.

Please refer to FIG. 5, the manufacturing method of the inductance element in this case includes: in step S11, providing a core body with embedded conductive coil and exposed lead, wherein the pin is electrically connected to the conductive coil and from the core body Penetrate through to extend along the outer surface of the core; in step S12, the metal plate is integrally formed into a shield, wherein the shield includes an accommodating space, openings on opposite sides of the accommodating space, and baffles And in step S13, the core is allowed to enter the accommodating space from the opening and abut the baffle, so that the shield wraps the core and exposes the pin.

In summary, the shielding piece of 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 accommodating space, The baffle of the shielding member can position the core body in the accommodating space. Therefore, after the core body 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 automated design.

The above implementations are only illustrative of the effect of this creation, not used to limit this creation. Anyone who is familiar with this skill can modify these implementations without departing from the spirit and scope of this creation. With change. In addition, the number of structures in the above-mentioned embodiments is merely an illustrative description, and is not intended 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‧‧‧Lead 21a‧‧‧First foot 21b‧‧‧Second foot 3‧‧‧Core 31‧‧‧Top surface 32‧‧‧First side 33‧‧‧Second side 34‧ ‧‧Bottom surface 35‧‧‧Fourth side 4‧‧‧Shield 41‧‧‧ Cover piece 42a‧‧‧First extension piece 42b‧‧‧Second extension piece 43a‧‧‧First bending piece 43b‧‧ ‧Second bending piece 44a‧‧‧First welding piece 44b‧‧‧‧Second welding piece 45‧‧‧‧Ball piece 46‧‧‧Opening S11~S13‧‧‧Step

Figures 1A and 1B are respectively an exploded view and a combined drawing of the inductance element of this case; Figures 2A to 2E respectively show the cores of the inductance element of this case at different angles; Figures 3A to 3E respectively show the Masks of different angles, where the angle of Figure 3A corresponds to the angle of Figure 2A, the angle of Figure 3B corresponds to the angle of Figure 2B, the angle of Figure 3C corresponds to the angle of Figure 2C, and the angle of Figure 3D corresponds to The angle of Figure 2D and the angle of Figure 3E correspond to the angle of Figure 2E; Figures 4A to 4E respectively illustrate the inductance elements of different angles in this case, where the angle of Figure 4A corresponds to the angle of Figure 3A and the fourth 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, the angle of Figure 4E corresponds to the angle of Figure 3E; and Figure 5 This is the flow chart of the manufacturing method of the inductive component in this case.

2‧‧‧pin

3‧‧‧Core

4‧‧‧Shield

Claims (10)

An inductive element includes: a core body having a conductive coil embedded therein and an outer surface; a pin electrically connecting the conductive coil and extending from the core body to extend along the outer surface of the core body; and The shielding member has an accommodating space to cover the core body and expose the pin, and the shielding member includes openings and baffles on opposite sides of the accommodating space for the core body to enter the accommodating chamber from the opening Space and lean against the file. The inductance element as described in item 1 of the patent application range, wherein the outer surface of the core includes a first side, a second side opposite to the first side, a third connecting the first side and the second side The side surface, the fourth side surface opposite to the third side surface and connecting the first side surface and the second side surface, the top surface connecting the first side surface, the second side surface, the third side surface and the fourth side surface, relative to 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 inductive element as described in item 2 of the patent application scope, wherein the pin includes a first leg portion and a second leg portion, the first leg portion and the second leg portion are respectively from the first side surface and the second leg portion The two side surfaces pass through to extend along the first side surface and the second side surface to the bottom surface and abut against the bottom surface, respectively, and the first leg portion is flush with the second leg portion. The inductive element as described in item 2 of the patent application range, wherein the baffle abuts the first side or the second side. The inductance element as described in item 2 of the patent application scope, wherein the shielding member includes a cover piece connected to the baffle, a first extension piece and a second extension piece extending from opposite sides of the cover piece, respectively connected to The first bending piece and the second bending piece of the first extension piece and the second extension piece. The inductance element as described in item 5 of the patent application range, wherein the cover sheet of the shielding member covers the top surface, and the first extension sheet and the second extension sheet cover the third side and the fourth side, respectively, the The first bending piece and the second bending piece abut against the bottom surface, and the first bending piece is flush with the second bending piece. The inductance element as described in item 5 of the patent application scope, wherein the first bending piece and the second bending piece are separated with a gap for extending to the first leg portion and the bottom of the bottom surface The second leg is exposed from the space. The inductance element as described in item 5 of the patent application scope, wherein the shielding member further includes a first welding piece formed on the first bending piece and a second welding piece formed on the second bending piece, and the The first welding piece is flush with the second welding piece. The inductive element as described in item 1 of the patent application scope, wherein the shielding member is integrally formed by a metal plate. A method for manufacturing an inductive element includes: providing a core body with embedded conductive coils and exposed leads, wherein the pins are electrically connected to the conductive coils and pass from the core body to extend along the outside of the core body The surface is extended; the metal plate is integrally formed into a shield, so that the shield includes the accommodating space, openings and baffles on opposite sides of the accommodating space; and the core body enters the accommodating space from the opening and Abutting against the baffle, the shielding member covers the core and exposes the pin.

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