TWM578007U - Inductor - Google Patents

Abstract

An inductor is disclosed. The inductor includes a cover, a magnetic core embedded with a coil therein, and terminals electrically connected with the coil. The cover includes a receiving space, a top cover sheet and a bottom cover sheet opposite to each other, a side cover sheet coupling the top cover sheet with the bottom cover sheet, a stopping sheet bending and extending from the top cover sheet toward the bottom cover sheet, and a locating sheet bending and extending from the bottom cover sheet toward the top cover sheet. With an opening communicating the receiving space formed between the stopping sheet and the locating sheet, the magnetic core embedded with the coil therein is placed into the receiving space and positioned in the receiving space by the stopping sheet and the locating sheet. Afterwards, the top cover sheet and the bottom cover sheet are close to each other with the side cover sheet as an axis, such that the opening becomes smaller until the stopping cover sheet and the locating cover sheet being adjacent to and cover the same side surface of the magnetic core.

Description

Inductive component

This case relates to a passive component, in particular, to an inductive component having a shielding function.

An 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 current passing through it, thus resisting the change of current. This property is called inductance. Inductive components can have filtering and oscillating effects in the circuit, and also have electromagnetic wave interference, electromagnetic radiation shielding, and noise in the filtered current. Inductive components are used in a wide range of applications, including power supplies, monitors, switches, motherboards, scanners, telephones, modems, and more.

In general, the inductive component can include a coil and a magnetic material cover covering the coil. For such an inductive component, a shield structure is generally designed to prevent the electronic component on the circuit board from being affected by the electromagnetic radiation of the inductive component, for example, in the circuit. Large shields are designed on the board to shield the electronic components on the board that need to be shielded, but the process is complicated to make it difficult to automate the design.

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

In order to overcome the above problems and other problems, the present invention provides an inductive component having a shielding function.

The inductive component of the present invention comprises: a shielding member comprising an opposite top cover sheet and a bottom cover sheet, a side cover sheet connecting the top cover sheet and the bottom cover sheet, and extending from the top cover sheet to the bottom cover sheet a plurality of sheets, a positioning piece bent from the bottom cover sheet to the top cover sheet, and formed between the top cover sheet, the bottom cover sheet, the side cover sheet, the sheet and the positioning sheet a magnetic core is disposed in the shielding member to be positioned in the accommodating space by the splicing piece and the positioning piece, and the magnetic core is embedded with a coil; and the two terminals are embedded and embedded The coils in the magnetic core are electrically connected and exposed to the shielding member.

In addition, the coil may be coated with a magnetic core powder to integrally form a magnetic core in which the coil is embedded and exposed to electrically connect the two terminals of the coil.

Further, the shield member may be integrally formed by stamping and bending a metal plate.

Moreover, before the magnetic core of the present invention is placed in the shielding member, the angle between the top cover sheet and the bottom cover sheet is greater than 90 degrees; and after the magnetic core of the present case is placed in the shielding member, the top cover sheet is The bottom cover sheet is axially adjacent to the side cover sheet to gradually reduce the opening until the flap and the positioning piece are adjacent to cover the same side of the magnetic core, and the top cover sheet and the bottom cover are covered. The sheets are parallel to the top and bottom surfaces of the core, respectively.

In addition, the magnetic core of the present invention includes opposite top and bottom surfaces and opposite first and third sides and opposite second and fourth sides connecting the top and bottom surfaces, and the plurality of files of the present case include the first a first piece and a third piece adjacent to the first piece to collectively cover the first side, the side cover covering the third side, the second piece And the third sheet covers the second side and the fourth side, respectively.

Furthermore, the shielding member of the present invention further comprises a soldering portion formed on the bottom cover sheet and a two-way opening exposing the two terminals, wherein a through opening is formed in the side cover sheet and the bottom cover sheet, and another through port is formed in the The positioning piece and the bottom cover piece.

Therefore, the magnetic core embedded in the coil of the closed magnetic circuit inductor can be nested by the integrally formed shielding member, and the closed magnetic circuit inductor can be positioned by the shielding piece and the positioning piece to be positioned on the shielding member. Then, the top cover sheet is bent downward to cover the closed magnetic circuit inductor, thereby forming electromagnetic shielding.

The embodiments of the novel creations are described below by way of specific embodiments, and those skilled in the art can readily appreciate other advantages and functions of the novel creations as disclosed herein. It is to be understood that the structure, the proportions, the size and the like of the drawings are only used to cope with the contents disclosed in the specification for the understanding and reading of those skilled in the art, and are not intended to limit the novel creation. The qualifications of the implementation are not technically meaningful. Any modification of the structure, change of the proportional relationship or adjustment of the size should be continued without affecting the effectiveness and the purpose of the new creation. Within the scope of the technical content disclosed in the new creation.

Please refer to Figures 1A and 1B, 2A~2C and 3A~3C, where Figures 1A and 1B are respectively exploded views of the different viewing angles of the inductive components of the present case, and Figures 2A, 2B and 2C are respectively different inductive components of the present invention. A schematic diagram of the combination of viewing angles, and FIGS. 3A, 3B, and 3C are respectively perspective views of different viewing angles of the inductive components of the present invention.

The inductance component of the present invention includes a magnetic core 3 in which a coil (not shown) is embedded, terminals 21 and 23 electrically connected to the coil and penetrating outward from the inside of the magnetic core 3, and the magnetic core 3 is covered and the terminals 21 and 23 are exposed. Covering member 4.

The magnetic core 3 includes a first side 31, a second side 32, a third side 33, and a fourth side 34 that are connected to each other, and to the first side 31, the second side 32, the third side 33, and the fourth side 34. Opposite top surface 35 and bottom surface 36. The terminal 21 is electrically connected to the coil embedded in the magnetic core 3 and can pass through the first side 31. The terminal 23 is electrically connected to the coil embedded in the magnetic core 3 and can pass through the third side 33.

In general, the material of the magnetic core 3 may be, for example, iron, iron alloy, iron powder, iron alloy powder, ferrite or other magnetic material, wherein the ferrite may be a ferrite compound containing nickel zinc or manganese zinc, and the ferroalloy The powder may include an iron-nickel-molybdenum alloy, an iron-aluminum-niobium alloy, or an iron-nickel alloy. Further, the magnetic core 3 may be formed by mixing a plurality of magnetic materials (such as one or more kinds of iron powder) and a non-magnetic material (such as an adhesive or a filler such as a resin), and integrally molding the conductive coils therein. For example, a magnetic core powder composed of a magnetic powder, a resin powder, or the like is placed in a mold, and the core powder is completely surrounded by the coil to expose only the both ends of the coil, and then a press work is performed to integrally form the embedded core. The core of the coil. In addition, the exposed ends of the coil may be bent downward and flattened to extend to the bottom surface 36 of the magnetic core 3 to form L-shaped terminals 21 and 23, or the coil itself may be flat or at the exposed ends. The terminal pieces are soldered and bent downward to extend to the bottom surface 36 of the magnetic core 3 to form L-shaped terminals 21 and 23 to facilitate the use of surface mount technology (SMT).

The shielding member 4 includes a flap 411, a positioning piece 412, a flap 42, a side cover sheet 43, a flap 44, a top cover sheet 45, a bottom cover sheet 46, and is formed on the flap 411, the positioning piece 412, the flap 42, and the side. The cover sheet 43, the flap 44, the accommodating space 47 between the top cover sheet 45 and the bottom cover sheet 46, and the opening 48 that communicates with the accommodating space 47.

The flap 411 is bent and extended from the top cover sheet 45 to the bottom cover sheet 46. The positioning piece 412 is bent and extended from the bottom cover sheet 46 to the top cover sheet 45. When the combination is completed, the flap 411 and the positioning piece 412 are adjacent to each other for common coverage. First side 31. In addition, the flap 42 is bent from the top cover sheet 45 to the bottom cover sheet 46 and partially covers the second side surface 32. The flap 44 is bent from the top cover sheet 45 to the bottom cover sheet 46 and partially covers the fourth side surface. 34. The side cover sheet 43 connects the top cover sheet 45 and the bottom cover sheet 46 and covers the third side surface 33.

Before the magnetic core 3 is placed in the accommodating space 47 of the shielding member 4, the top cover sheet 45 is away from the bottom cover sheet 46 to form an opening 48 between the flap 411 and the positioning piece 412, that is, the top cover sheet 45 and the bottom. The angle between the cover sheets 46 is greater than 90 degrees. After the magnetic core 3 is placed in the accommodating space 47 of the shield member 4, the top cover sheet 45 and the bottom cover sheet 46 are adjacent to each other with the side cover sheet 43 as an axis to open the opening. 48 gradually becomes smaller until the flap 411 and the positioning tab 412 are adjacent to collectively cover the first side 31, and the top cover sheet 45 is parallel to the top surface 35, and the assembly is completed.

The shield 4 can be integrally formed from a metal plate by performing a stamping or drawing operation. For example, the shield 4 can be produced, for example, by stamping a thin copper plate and forming a shape covering the magnetic core 3. In addition, a slit 410 may be designed between the future forming of the flap 411 and the flap 42 and between the flap 44, and between the flap 42 and the flap 44 and the side cover sheet 43 before stamping the metal sheet. For the stamping operation, the flaps 411, 42 and 44 and the side cover sheet 43 can be bent downward.

Furthermore, the shielding member 4 may further include soldering portions 462 and 464 formed on the bottom cover sheet 46 and the through ports 461 and 463, wherein the openings 461 and 463 respectively expose the terminals 21 and 23, which may pass through the soldering portions 462 and 464. The inductive component is soldered to the circuit board for electrical connection or grounding, and is additionally electrically connected to terminals 21 and 23.

Accordingly, the magnetic core 3 in which the coil is embedded in the present case is basically an inductor, which has a closed magnetic circuit and can be directly inserted into the integrally formed clip-type shielding member 4, thereby making the magnetic circuit sealing effect better. The positioning piece 412 and the flap 411 are positioned therein, and the welded portions 462 and 464 are also designed on the bottom cover sheet 46 so that no further bending is required.

Next, a flow chart of the method of manufacturing the inductor element of the present invention will be briefly described.

First, a magnetic core in which a coil is embedded is formed, and the magnetic core is exposed with two terminals electrically connected to both ends of the coil. It should be noted that the magnetic core in which the coil is embedded is integrally formed. In detail, first, a magnetic core powder composed of magnetic powder, resin powder, or the like is placed in the mold, and the core powder coated coil is exposed only. Both ends of the coil are then subjected to a die casting operation using a punch to press and bond the magnetic powder and the resin powder to each other to form a core, thereby enclosing the coil therein to constitute a magnetic core in which the coil is embedded. In addition, the two ends of the exposed coil are two terminals or another terminal piece for soldering as two terminals, and the two terminals can be bent to the bottom surface of the magnetic core.

Next, a shield is formed. The shielding member comprises an opposite top cover sheet and a bottom cover sheet, a side cover sheet connecting the top cover sheet and the bottom cover sheet, a flap extending from the top cover sheet to the bottom cover sheet, and a bottom cover sheet bent from the bottom cover sheet to the top cover sheet. The extended positioning piece and the accommodating space formed between the top cover piece, the bottom cover piece, the side cover piece, the blade and the positioning piece. It should be noted that the shielding member is integrally formed by the punching operation of the metal plate, and the seam may be formed in the future between the blade and the blade or between the blade and the side cover sheet in the metal plate. In order to facilitate the bending of the flap and the side cover sheet, and the flap is not connected to the bottom cover sheet after being bent. In addition, the shielding member may further comprise two welded portions formed on the bottom cover sheet and two through ports for exposing the two terminals.

The above-mentioned magnetic core in which the coil is embedded and the shielding member are formed are not limited by the above-described order, and the shielding member can be formed first to form the magnetic core in which the coil is embedded.

Furthermore, when the top cover sheet is away from the bottom cover sheet to form an opening connecting the accommodating space between the flap and the locating sheet, the magnetic core embedded with the coil is inserted into the accommodating space of the shield from the opening. in. In addition, the magnetic core enters the accommodating space, and the bottom surface is located on the bottom cover sheet of the shielding member, and is positioned in the accommodating space of the shielding member by the flap and the positioning piece, and the two terminals can be self-shielding Exposed.

Finally, the top cover sheet and the bottom cover sheet are brought close to each other with the side cover sheets as axes to gradually reduce the opening until the flap and the positioning piece are adjacent to cover the same side of the magnetic core. It should be noted that, before the magnetic core embedded with the coil has not been placed in the accommodating space of the shielding member, the angle between the top cover sheet and the side cover sheet is greater than 90 degrees; the magnetic core embedded with the coil is placed in the shielding member. After the accommodating space, the top cover sheet is closed with the side cover sheet as the axial bottom cover sheet (that is, close to the top surface of the magnetic core), so that the opening between the flap and the positioning piece is gradually reduced, that is, the top cover The angle between the sheet and the side cover sheet gradually becomes smaller until it approaches 0 degree, at which time the top cover sheet is substantially parallel to the top surface of the magnetic core, and the flap is adjacent to the positioning sheet to cover the same side of the magnetic core together with the positioning sheet.

Thereby, the shielding member can be similar to the clip to sandwich the magnetic core between the top cover sheet and the bottom cover sheet, and the magnetic core is positioned in the accommodating space of the shield member by the flap and the positioning piece.

In summary, the inductive component of the present case is formed by bending the top cover of the shield to cover the core and the coil which can be regarded as a closed magnetic circuit inductor to form electromagnetic shielding, and the welded portion is designed to be covered at the bottom. On the chip, there is no need to bend again to facilitate automatic design.

The above embodiments merely exemplify the effects of the novel creation, and are not intended to limit the novel creation. Anyone skilled in the art can implement the above-mentioned embodiments without departing from the spirit and scope of the novel creation. Modifications and changes are made. Moreover, the number of structures in the above-described embodiments is merely illustrative and is not intended to limit the novel creation. Therefore, the scope of protection of the new creation should be as listed in the scope of the patent application described later.

21, 23‧‧‧ terminals

3‧‧‧ magnetic core  31‧‧‧ first side

32‧‧‧ second side  33‧‧‧ third side

34‧‧‧ fourth side  35‧‧‧ top surface

36‧‧‧ bottom  4‧‧‧Shields

410‧‧‧ slitting  411‧‧ ‧ pieces

412‧‧‧ Positioning film  42‧‧‧

43‧‧‧ side cover film  44‧‧‧

45‧‧‧Top Cover  46‧‧‧ bottom cover film

462, 464‧‧ ‧ Welding Department  461, 463‧‧ ‧ mouth

47‧‧‧ accommodating space  48‧‧‧ openings  

1A and 1B are respectively exploded schematic views of different perspectives of the inductive component of the present invention;  2A, 2B, and 2C are respectively schematic diagrams of combinations of different viewing angles of the inductive components of the present invention;  3A, 3B and 3C are respectively perspective views of different perspectives of the inductive component of the present invention.  

Claims (8)

An inductive component includes:  The shielding member comprises an opposite top cover sheet and a bottom cover sheet, a side cover sheet connecting the top cover sheet and the bottom cover sheet, and a plurality of flaps extending from the top cover sheet to the bottom cover sheet. a positioning piece that is bent and extended to the top cover sheet, and an accommodating space formed between the top cover sheet, the bottom cover sheet, the side cover sheet, the flap and the positioning piece;  a magnetic core is disposed in the shielding member to be positioned in the accommodating space by the blade and the positioning piece, and the core is embedded with a coil;  The two terminals are electrically connected to the coil embedded in the magnetic core and exposed to the shielding member.   The inductive component of claim 1, wherein the magnetic core includes opposing top and bottom surfaces and opposite first and third sides and opposite second sides and the first and second sides connecting the top and bottom surfaces The four sides, the plurality of flaps comprise a first flap and an opposite second flap and a third flap, the first flap and the positioning tab being adjacent to collectively cover the first side, the side covering sheet Covering the third side, the second flap and the third flap cover the second side and the fourth side, respectively. The inductive component of claim 1, wherein the shielding member further comprises two soldering portions formed on the bottom cover sheet. The inductive component of claim 1, wherein the shielding member further comprises a two-port opening exposing the two terminals, wherein a through port is formed on the side cover sheet and the bottom cover sheet, and another through port is formed in the The positioning piece and the bottom cover piece. The inductance element according to claim 1, wherein the shielding member is integrally formed of a metal plate. The inductive component according to claim 1, wherein the coil is coated with a magnetic core powder to integrally form a magnetic core in which the coil is embedded and exposed to electrically connect the two terminals of the coil. The inductive component of claim 1, wherein an angle between the top cover sheet and the bottom cover sheet is greater than 90 degrees before the magnetic core has been placed in the shield. The inductive component of claim 1, wherein after the magnetic core is placed in the shielding member, the top cover sheet and the bottom cover sheet are axially adjacent to the side cover sheet to gradually change the opening. Small, until the flap and the positioning piece are adjacent to cover the same side of the magnetic core, the top cover sheet and the bottom cover sheet are respectively parallel to the top surface and the bottom surface of the magnetic core.