JP4793764B2 - Electronic component and method for manufacturing electronic component - Google Patents

Description

  The present invention relates to an electronic component and a method for manufacturing the electronic component, and more particularly to an electronic component in which an element is accommodated in an insulating case and a method for manufacturing the electronic component.

  2. Description of the Related Art Conventionally, a coil component that is an electronic component including a toroidal coil in which a plurality of conductive wires are wound around a toroidal core and a resin case that accommodates the toroidal core is known.

  Japanese Patent Laid-Open No. 6-333767 (Patent Document 1) describes a coil component having this configuration. A toroidal coil in which a conducting wire is wound around an annular toroidal core is accommodated in a resin case. A number of terminal fittings corresponding to the number of one end and the other end of the conducting wire are integrally formed on the resin case. One end or the other end of the conducting wire is soldered and electrically connected to the terminal fitting.

In the method of manufacturing a coil component, a resin case is formed by insert molding on a terminal pin forming a lead frame, a lid is placed on the resin case containing a toroidal coil, and then the lead frame is plated at a predetermined position. Cut the frame. As a result, the external terminal is separated from the frame portion of the lead frame, and the coil component is separated from the frame portion.
JP-A-6-333767

  However, in the conventional coil component manufacturing process, as described above, by cutting the frame at a predetermined position of the lead frame, the portion of the lead frame that becomes the external terminal is separated from the frame portion of the lead frame to form the external terminal. Therefore, the cut surface of the external terminal generated by the frame cut becomes a non-plated surface that is not plated. For this reason, when mounting on a mounting substrate, the end part of the external terminal which is the said cut surface does not get solder, but the problem that mounting strength weakens arises.

  Then, an object of this invention is to provide the electronic component which can raise the mounting strength at the time of mounting, and the manufacturing method of the said electronic component by having plated the edge part of the external terminal.

In order to achieve the above object, an insulating case, and a plurality of external terminals that are supported by the insulating case by being integrally formed with the insulating case by an insert mold , are exposed from the insulating case, and are plated on the entire outer surface. provided one by one integrally with said plurality of external terminals, comprising a metal section having a part exposed from the insulating case, a portion of the exposed, mechanically and after board mounting also for any conductor In the insulating case, the exposed portion of the metal part is a part of the external terminal and the portion exposed from the insulating case. Provided is an electronic component which is arranged at a different position and in which the exposed part of the metal part and a part of the external terminal exposed from the insulating case are separated by a part of the insulating case Shi There.

  A metal part provided integrally with the external terminal and having a part exposed from the insulating case, and the exposed part is not directly mechanically and electrically connected to any conductor even after mounting on the board. Since the metal part is a part that is separated from the frame part of the lead frame, the non-plated cut surface generated by the separation from the frame part of the lead frame is the external terminal. It can be prevented from being formed, the entire outer surface of the external terminal can be plated, a solder fillet can be formed during board mounting, and the mounting strength can be improved.

  Here, it is preferable that the end face of the metal portion is not flush with the surface of the insulating case and is exposed to be flush with the surface of the insulating case. Since the metal part is exposed without being projected from the insulating case and its end face is flush with the surface of the insulating case, the metal part can be prevented from coming into contact with other objects.

  Moreover, it is preferable that this metal part protrudes from the surface of this resin case. Since the metal part protrudes from the surface of the resin case, it is easier to manufacture than the case where the end face of the metal part is exposed to be flush with the surface of the insulating case without protruding from the insulating case. It can be a coil component.

  The resin case has an outer contour defined by a main surface and a concave surface portion having a predetermined depth with respect to the main surface, and the metal portion protrudes from the concave surface portion below the predetermined depth. It is preferable to do.

  The resin case has an outer contour defined by a main surface and a concave surface portion having a predetermined depth with respect to the main surface, and the metal portion protrudes from the concave surface portion below the predetermined depth. The metal part can be accommodated in the space defined by the concave surface part, and the metal part can be prevented from coming into contact with other objects.

  In addition, the resin case has a case body having an element housing space that has one surface and is open in the one surface, and a substantially plate-shaped resin cover that closes the one surface, An electronic element is accommodated in the element accommodating space, and the case body includes a main surface and a concave portion having a predetermined depth with respect to the main surface, and a boundary between the main surface and the concave surface portion. The main body and the concave surface define the outer contour of the case body. The resin cover extends to the vicinity of the step part and the resin cover is relative to the case body. It is preferable that an extending portion that can come into contact with the stepped portion when it is moved is provided.

  The case main body includes a main surface and a concave surface portion having a predetermined depth with respect to the main surface, and a step portion is provided at a boundary between the main surface and the concave surface portion, and the main surface and the concave surface The outer contour of the case main body is defined by the portion, and the resin cover is provided with an extending portion that extends to the vicinity of the stepped portion. It is possible to prevent the position of the resin cover from being displaced with respect to the case main body by the extension portion coming into contact with the stepped portion when moved.

  Moreover, it is preferable that this metal part protrudes from this concave surface part, and this extension part can be latched to this metal part.

  The metal part protrudes from the concave surface part, and the extension part can be locked to the metal part, so that the extension part is locked to the metal part, thereby strengthening the resin cover against the case body. It can fix, and it can prevent more reliably that the position of the resin cover with respect to a case main body shifts | deviates.

  Moreover, it is preferable that a part of the extended portion is disposed outside the outer contour of the case body so as to cover the metal portion.

  Since a part of the extension part is arranged outside the outer contour of the case body rather than the metal part, the extension part covers the metal part to prevent the metal part from contacting other objects. can do.

Further, the present invention includes a plurality of external terminals, and a metal portion connected one by one integrally to said plurality of external terminals, and a frame portion connected integrally with the metal section, external terminal and the Preparing a lead frame plated with the entire outer surface including the metal part and the frame part, forming an insulating case by an insert mold so as to expose the external terminal and the metal part, and the metal part And in the step of molding the insulating case, in the insulating case, the exposed portion of the metal portion is a part of the external terminal and is exposed from the insulating case. The exposed portion of the metal portion and the portion of the external terminal that is exposed from the insulating case are separated by a portion of the insulating case. Insert module And it provides a process for the production of electronic components field.

  An external terminal, a metal part integrally connected to the external terminal, and a frame part integrally connected to the metal part, and the entire outer surface including the external terminal, the metal part, and the frame part Since there are a step of preparing a plated lead frame, a step of forming an insulating case by an insert mold so as to expose the external terminal and the metal portion, and a step of separating the metal portion from the frame portion. It is not necessary to detach the external terminal from the frame portion, and it is possible to prevent a non-plated cut surface formed by detaching from the frame portion of the lead frame from being formed in the external terminal. For this reason, the entire outer surface of the external terminal can be plated, a solder fillet can be formed at the time of board mounting, and an electronic component that improves mounting strength can be manufactured.

  As described above, the present invention can provide an electronic component that can increase the mounting strength at the time of mounting by plating the end portion of the external terminal, and a method for manufacturing the electronic component.

  An electronic component and an electronic component manufacturing method according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the electronic component is a coil component 1, more specifically, a common mode choke coil. The coil component 1 includes a coil body 10, a resin case 20, four metal terminals 30, 30, 30, 30 and a resin cover 40.

  The coil body 10 includes an annular toroidal core 11 and two coated conductors 12 and 12 that are insulated around the periphery. The covered conductor 12 is made of, for example, polyamideimide wire (AIW), and the entire circumference of the conductor is covered with a heat-resistant insulating coating. The diameter of the portion of the conductive wire inside the covered conductive wire 12 is about 200 μm, which is relatively thick, and is larger than the thickness of the terminal fitting constituting the metal terminal 30 described later. The toroidal core 11 has a substantially spiral shape in the circumferential direction of the toroidal core 11 by the coated conductors 12 and 12 so that the two coated conductors 12 and 12 pass alternately on the inner peripheral side and the outer peripheral side of the annular toroidal core 11. It is wound around. The two covered conducting wires 12 and 12 are staggered in the circumferential direction of the toroidal core 11. The coil body 10 corresponds to an electronic element.

  The case 20 has a substantially rectangular parallelepiped shape, and the dimension is about 9 × 6 × 7 mm. As shown in FIG. 1, a coil body housing portion 20 </ b> C having a substantially cylindrical recess 20 a for housing the coil body 10 is provided at a substantially central position of the upper surface 20 </ b> A of the case 20. The coil main body 10 is accommodated in 20a in a substantially coaxial positional relationship with the recess 20a. The case 20 corresponds to a case body, and the case 20 and the resin cover 40 correspond to an insulating case. The upper surface 20A corresponds to one surface.

  A pair of hooks 21 and 21 are integrally provided with the case 20 at a position in the diameter direction of the substantially cylindrical recess 20a and in the direction connecting the lower left and upper right in FIG. ing. The hook 21 extends from the upper surface 20A of the case 20 in the direction of a resin cover 40, which will be described later, and connects the lower left and upper right of FIG. And a hook contact portion 21B that is bent substantially vertically. The hook contact portion 21B can be engaged with a pair of hook receiving portions 42, 42 of a resin cover 40 described later.

  As shown in FIGS. 1 and 3, the case 20 has four cutouts 20 b, 20 b, 20 b, and 20 b. The notches 20b, 20b, 20b, and 20b extend from the top surface 20A to the bottom surface 20B of the case 20, and the side portions that connect the side surfaces of the case 20 having a substantially rectangular parallelepiped shape are formed in two steps. It is formed as a notch. The surface of the case 20 that defines the notch forms a concave surface portion 20b-1, and one plane that occupies most of the side surface of the case 20 that is not provided with the metal terminals 30L and 30R described later is the main surface 20. -1. Accordingly, the outer contour of the case 20 is defined by the main surface 20-1 and the concave portion 20b-1. Moreover, the boundary part of this main surface 20-1 and this concave surface part 20b-1 makes the level | step-difference part 20b-2. Each of the first step 20b-3 and the second step 20b-4 of the concave surface portion 20b-1 having a two-step shape has a predetermined depth with respect to the main surface 20-1.

  In the notch 20b, the metal portion 33A is disposed at a position 20b-3 that is lowered by one step from the main surface 20-1 and immediately before it is lowered to the second step 20b-4. Although the metal portion 33A protrudes from the concave surface portion 20b-1 that has a substantially rectangular parallelepiped shape and defines a notch, the protruding length is greater than the depth of the first step 20b-3 of the concave surface portion 20b-1 with respect to the main surface 20-1. It is shorter and is located inward of the case 20 than the main surface 20-1. For this reason, the metal part 33A can be accommodated in the space defined by the concave surface part 20b-1, and the metal part 33A can be prevented from coming into contact with other objects. Further, in order to prevent the metal part 33A from coming into contact with other objects, it is compared with the case where only the end face 33B of the metal part 33A is exposed to be flush with the surface of the case 20 without protruding from the case 20. Thus, the coil component 1 can be easily manufactured.

  The protruding end surface 33B of the metal portion 33A forms a cut surface that is generated by being separated from the frame portion 3-1 (FIG. 4) of the lead frame 3 in the manufacturing process of the coil component 1 as described later, and is not plated. Make a non-plated surface. Even after the coil part 1 is mounted on the substrate, the metal part 33A is not directly connected mechanically and electrically to any conductor and is left in a disconnected state.

  The upper surface 20A of the case 20 is provided with a columnar convex portion 20D extending in the direction of a resin cover 40 described later, that is, upward in FIG. A total of four cylindrical convex portions 20D are formed around the concave portion 20a of the coil body housing portion 20C and in the vicinity of the notches 20b of the substantially rectangular parallelepiped case 20. As will be described later, when the resin cover 40 is mounted and fixed on the upper surface 20A of the case 20, the protruding end of the cylindrical convex portion 20D is configured to abut on the lower surface 40B of the resin cover 40. In addition, a portion near one end of the covered conducting wire 12 or a portion near the other end is hung on the cylindrical convex portion 20D, so that one end of the covered conducting wire 12 and the position of the covered conducting wire 12 from the position hung on the cylindrical convex portion 20D. The portion up to the other end can be oriented in a direction substantially parallel to the long side of the upper surface 20A of the case 20 having a substantially rectangular shape, that is, a direction connecting substantially lower left and upper right in FIG.

  As shown in FIG. 2, the resin cover 40 includes a plate-like portion 41, a pair of hook receiving portions 42, 42, a pair of protruding pieces 43, 43, and four extended plate-like portions 44, 44, 44, 44. And. The plate-like portion 41 has a rectangular plate shape whose outer shape is substantially the same as that of the upper surface 20 </ b> A of the case 20. A plate-like portion through hole 40a that opens in a rectangular shape on the upper surface 40A is formed at the center position of the pair of short sides of the rectangular plate-like portion 41.

  As shown in FIG. 2, the pair of hook receiving portions 42, 42 are integral with the plate-like portion 41, and have a pair of short sides on the lower surface 40 </ b> B (upper surface in FIG. 2) of the rectangular plate-like portion 41. At each central position, it is provided so as to protrude in the direction of the case 20, that is, downward in FIG. As shown in FIG. 2, the hook receiving portion 42 has a substantially U-shape when viewed from below. As shown in FIG. 2, when the substantially U-shape is considered as a pair of side wall portions 42 </ b> A, 42 </ b> A and a bottom wall portion 42 </ b> B connecting these pair of side wall portions 42 </ b> A, 42 </ b> A, From the lower end (upper end in FIG. 2) as the protruding end of the portion 42 toward the plate-like portion 41, from the predetermined position to the plate-like portion 41, toward the short side of the plate-like portion 41 having a substantially rectangular shape A recessed hook fitting recess 42a (FIG. 2) is formed. The hook fitting recess 42 a communicates with the plate-like portion through hole 40 a (FIG. 1) of the plate-like portion 41.

  As shown in FIG. 2, a pair of protruding pieces 43 are provided integrally with the plate-like portion 41 at positions substantially in the middle of the pair of long sides of the plate-like portion 41 having a substantially rectangular shape. The position where the pair of projecting pieces 43, 43 is provided is the portion between the pair of hooks 21, 21 on the line connecting the pair of hooks 21, 21 when the resin cover 40 is attached to the case 20. It corresponds to a position on an imaginary line that intersects substantially vertically and straddles the opening in the upper surface 20A of the recess 20a. The protruding piece 43 has a substantially rectangular parallelepiped shape, and the surfaces 43A and 43A where the protruding pieces 43 and 43 face each other have an arc shape that is recessed in a direction away from one of the opposing protruding pieces 43A and 43A. Yes. When the resin cover 40 is mounted and fixed to the case 20, the lower end 43 </ b> B serving as the protruding end of the protruding piece 43 contacts the upper surface 20 </ b> A corresponding to one surface of the case 20.

  The protruding piece 43 is configured by a rectangular parallelepiped whose longitudinal direction coincides with the direction of the long side of the substantially rectangular plate-like portion 41 and has a predetermined length in the longitudinal direction, and has high rigidity. . The predetermined length is a length including a portion to be attracted by a mounter nozzle (not shown) in the long side direction of the plate-like portion 41.

  As shown in FIG. 1, the extension plate-like portion 44 is provided in a total of four pairs in the vicinity of the long side of the substantially rectangular plate-like portion 41 and at the positions corresponding to both sides of the protruding piece 43. ing. The extended plate-like portion 44 has a substantially rectangular plate shape extending toward the metal portion 33A of the case 20, and defines the substantially rectangular shape, and is the length of the extended plate-like portion 44 facing each other. When the resin cover 40 is fixed to the case 20, the side is arranged at the first step 20 b-3 portion of the notch 20 b having a two-step shape, and slightly on the step portion 20-2 of the case 20. Opposite each other through a gap. Therefore, when the resin cover 40 moves relative to the case 20, the extended plate-like portion 44 comes into contact with the stepped portion 20-2 so that the position of the resin cover 40 with respect to the case 20 is shifted. Can be prevented. The length of the extending plate-like portion 44 in the longitudinal direction is such that it does not contact the metal portion 33 </ b> A when the resin cover 40 is fixed to the case 20. The extended plate-like portion 44 corresponds to an extended portion.

  As shown in FIG. 1, the metal terminals 30 are provided with four pieces corresponding to the number of one end and the other end of the coated conductor 12, and are supported by the case 20. More specifically, when molding the resin case 20, a part of the metal terminal 30 is disposed in the molten resin that becomes the case 20. That is, the case 20 and the metal terminal 30 are integrally formed by insert molding, whereby the metal terminal 30 is fixed and supported by the case 20. The portion of the metal terminal 30 exposed from the case 20 corresponds to an external terminal.

  The metal terminal 30 is formed by bending a plate-like terminal fitting having a thickness of about 150 μm and plated on the entire outer surface at a plurality of locations as shown in FIG. When it is considered that the metal terminal 30 is composed of the short piece 31 and the long piece 32, the portion near one end of the short piece 31 is bent in one step substantially in a step shape as shown in FIG. As shown in FIG. 3A, the portion near the other end extends at an angle of about 45 ° with respect to the portion near the one end to form a flat surface 31B and is connected to the long piece 32. . One end of the long piece 32 connected to the short piece 31 is bent perpendicularly to the plane 31B of the portion near the other end of the short piece 31 as shown in FIG. And is substantially parallel to the flat surface 31 </ b> B of the short piece 31, that is, parallel to the upper surface 20 </ b> A of the case 20. The portion from the predetermined position of the short piece 31 to the position bent in parallel with the upper surface 20A of the case 20 is arranged in the case 20 by integrally molding the metal terminal 30 and the resin case 20. The resin embedded portion 30A is formed. A portion closer to the other end of the long piece 32 than this portion forms a connecting portion 30B which is connected by laser welding to the conducting wire 12A.

  The connecting portion 30B of the long piece 32 extends back to a predetermined position along the upper surface 20A of the case 20 in parallel with the upper surface 20A, branches into two, and forms a first portion 32A and a second portion 32B. . A portion extending along the upper surface 20A of the case 20 to a predetermined position parallel to the upper surface 20A forms a receiving portion 32C facing the first portion 32A and the second portion 32B, and a folded portion is a folded portion 32D ( 3 (c)). As shown in FIG. 1, the folded portion 32 </ b> D faces the notch 20 b formed in the case 20. 3 and 4 show a state where the folded portion 32D is not completely folded for convenience of explanation. The receiving portion 32C is fitted in a groove (not shown) formed on the upper surface 20A of the case 20, and the upper surface of the receiving portion 32C is flush with the upper surface 20A of the case 20.

  With the first part 32A and the receiving part 32C sandwiching one end or the other end of the conductor 12A, the sandwiched conductor 12A and the first part 32A are subjected to laser welding or the like with a YAG laser, thereby conducting the conductor 12A. Is connected to the first part 32A. As shown in FIG. 1, the connected portion forms the spherical portion 30 </ b> C by melting the first portion 32 </ b> A, the receiving portion 32 </ b> C, and one end or the other end of the conducting wire 12 </ b> A.

  An extended metal portion 33 that further extends in the extending direction of the plane 31B is provided at a connection position where the short piece 31 and the long piece 32 are connected to each other in the plane 31B. The extending metal portion 33 further extends in a predetermined extending position by changing the direction in a direction that forms an angle of about 45 ° with respect to the plane 31B. As shown in FIG. 1, the distal end portion of the extended metal portion 33 forms the above-described metal portion 33 </ b> A that protrudes from the case 20 and is exposed. Therefore, the metal portion 33A, the terminal electrode 30, and the connecting portion 30B are integrally formed.

  The metal terminal 30L is different from the metal terminal 30R only in that it is bilaterally symmetric, so that the description thereof is omitted.

  Since the metal portion 33A provided integrally with the metal terminal 30 is provided and the metal portion 33A is not directly connected mechanically and electrically to any conductor after being mounted on the board, it is left unconnected. By setting the metal part 33A as a part that is separated from the frame part 3-1 of the lead frame 3, a non-plated cut surface generated by the separation from the frame part 3-1 of the lead frame 3 is the metal terminal 30. It can prevent forming in the part of an external terminal, and can make it the state which the whole outer surface of the external terminal was plated. For this reason, a solder fillet can be formed at the time of board mounting, and the mounting strength can be improved.

  In the manufacturing method of the coil component 1 which is an electronic component, the process which prepares the lead frame 3 (FIG. 4) first is performed. In the step of preparing the lead frame 3, as shown in FIG. 4, the metal terminal 30, the metal portion 33A connected integrally with the metal terminal 30, and the frame portion 3 connected integrally with the metal portion 33A. -1 is manufactured. The entire outer surface of the lead frame 3 is plated.

  Next, the process of molding the case 20 is performed. In the process of molding the case 20, the metal terminal 30 and the case 20 are integrally molded in a mold by insert molding. The molding is performed so that the external terminal portion of the metal terminal 30 and the metal portion 33A are exposed to the outside of the case 20. After the integral molding, a step of separating the metal portion 33A from the frame portion 3-1 is performed at the position indicated by A in FIG.

  Next, the coil body 10 composed of the toroidal core 11 around which the coated conducting wire 12 is wound is brought into a state of being housed in the recess 20a of the coil body housing portion 20C of the case 20. Next, as shown in FIG. 1, the portions near the one end and the portions near the other end of the two covered conductive wires 12 and 12 are respectively hung on the cylindrical convex portion 20D.

  Next, by irradiating YAG laser from above the case 20 in FIG. 1 in the direction from the upper surface 20A to the bottom surface 20B of the case 20 through the notch 20b, the insulating coating located above the conductive wire 12A in FIG. Are removed from one end and the other end of each. Further, by irradiating the YAG laser from below the case 20 in FIG. 1 in the direction from the bottom 20B of the case 20 to the top surface 20A through the notch 20b from the bottom of the case 20, the position is located below the conductor 12A in FIG. The insulating coating to be removed is removed from one end and the other end of the conducting wire 12A to expose the conducting wire 12A.

  Then, the connecting portion 30B of the metal terminal 30 is folded back to provide a folded portion 32D to hold the conducting wire 12A temporarily, and the first portion 32A and the receiving portion 32C sandwich the conducting wire 12A. Press.

  Next, the conductor 12A is connected to the connecting part 30B of the metal terminal 30 by irradiating both the first part 32A and the conductor 12A simultaneously with a YAG laser at a position where the YAG laser can be irradiated. Then, the resin cover 40 is covered from above the case 20 as shown in FIG. 1, and the extended plate-like portion 44 is inserted into the notch 20b so as to be opposed to the step portion 20-2 of the case 20, and the protruding piece. 43 is brought into contact with the upper surface 20A of the case 20, the cylindrical convex portion 20D of the case 20 is brought into contact with the lower surface 40B of the resin cover 40, and the hook 21 is engaged with the hook receiving portion 42 to be fixed to the case 20. The coil component 1 as an electronic component is manufactured.

  With the above manufacturing process, it is not necessary to separate the external terminal portion of the metal terminal 30 from the frame portion 3-1, and the non-plated cut surface generated by separating from the frame portion 3-1 of the lead frame 3 is external. It is possible to prevent the terminal from being formed. For this reason, the entire outer surface of the external terminal can be plated, a solder fillet can be formed at the time of board mounting, and an electronic component that improves mounting strength can be manufactured.

  The coil component according to the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims. For example, in the present embodiment, the metal portion 33A protrudes from the concave surface portion 20b-1 that defines the notch, but the end surface of the metal portion is exposed to be flush with the surface of the concave surface portion 20b-1 without protruding. You may let them. By doing in this way, it can prevent that metal part 33A contacts other things.

  Further, the length of the extending plate-like portion in the longitudinal direction may be longer than that of the present embodiment, and may be capable of contacting the metal portion 33A. Furthermore, the extended plate-like portion may be configured to be able to be locked to the metal portion 33A protruding from the surface of the concave portion 20b-1. With such a configuration, it is possible to prevent the resin cover from being displaced with respect to the case main body when the extending portion is locked or abutted on the metal portion 33A.

  Moreover, the length of the longitudinal direction of the extending plate-shaped part 44 is comprised longer than this Embodiment, The one part, for example, an extending edge part etc. protrudes from the surface of the concave-surface part 20b-1. You may comprise so that it may arrange | position outside the outline outline of a case main body rather than 33A. By setting it as such a structure, a part of extension plate-shaped part 44 can cover the metal part 33A, and it can prevent that the metal part 33A contacts another thing etc. by this.

Although using a YAG laser as the laser is not limited to this, for example, YVO laser or CO ₂ laser, half the SHG wavelength of the YAG laser, i.e. laser using second harmonic, LD (semiconductor) A laser, an excimer laser, or the like may be used.

  The electronic component according to the present embodiment is a common mode choke coil, but is not limited to this. Moreover, although the covered conducting wire 12 was comprised from the polyamide imide wire, it is not limited to this. For example, a polyester wire or a polyurethane wire may be used.

  Further, in the present embodiment, the coil body 10 has a configuration including the annular toroidal core 11, but the core is not limited to the toroidal core. Moreover, what is called an air core winding which does not have a core may be sufficient.

  The coil component of the present invention is particularly useful in the field of electronic components in which an insulating case from which an external terminal is exposed is provided by insert molding.

1 is an exploded perspective view showing an electronic component according to an embodiment of the present invention. The lower perspective view which shows the resin cover of the electronic component by embodiment of this invention. It is a figure which shows the metal terminal of the electronic component by embodiment of this invention, and a metal part, (a) is a top view, (b) is a side view, (c) is a front view. The top view which shows the state before a metal part is cut away from a flame | frame part in the manufacturing method of the electronic component by embodiment of this invention.

Explanation of symbols

1 Coil parts 3 Lead frame 3
3-1 Frame portion 20 Case 20-1 Main surface 20b Notch 20b-1 Concave surface portion 20b-2 Stepped portion 20C Coil body housing portion 30 Metal terminal 33A Metal portion 40 Resin cover 44 Extension plate-like portion

Claims (8)

An insulation case;
A plurality of external terminals that are supported by and exposed from the insulating case by being integrally formed with the insulating case by an insert mold, and the entire outer surface is plated,
Provided one by one integrally with said plurality of external terminals, comprising a metal section having a part exposed from the insulating case, a portion of the exposed, mechanically and after board mounting also for any conductor electrically Instead of being directly connected,
In the insulating case, the exposed portion of the metal portion is a part of the external terminal and is disposed at a position different from the portion exposed from the insulating case, and the exposed portion of the metal portion and the An electronic component characterized in that a part of an external terminal and a part exposed from the insulating case are separated by a part of the insulating case .   2. The electronic component according to claim 1, wherein the metal portion is exposed without being projected from the insulating case and having an end surface flush with the surface of the insulating case.   The electronic component according to claim 1, wherein the metal portion protrudes from the surface of the resin case.   The resin case has an outer contour defined by a main surface and a concave surface portion having a predetermined depth with respect to the main surface, and the metal portion protrudes from the concave surface portion at a predetermined depth or less. The electronic component according to claim 3. The resin case includes a case main body having an element housing space formed therein and having an opening in the one surface, and a substantially plate-shaped resin cover that closes the one surface. An electronic element is housed in the housing space,
The case main body includes a main surface and a concave surface portion having a predetermined depth with respect to the main surface, and a step portion is provided at a boundary between the main surface and the concave surface portion, and the main surface and the concave surface The outer contour of the case body is defined by the part,
The resin cover is provided with an extending portion that extends to the vicinity of the stepped portion and can contact the stepped portion when the resin cover moves relative to the case body. The electronic component according to claim 1.   6. The electronic component according to claim 5, wherein the metal part protrudes from the concave surface part, and the extension part can be locked to the metal part.   The electronic component according to claim 6, wherein a part of the extending part is disposed outside the outer contour of the case body so as to cover the metal part. A plurality of external terminals, the plurality of the outside terminal metal portions connected one by one piece, and a frame portion connected integrally with the metal section, external terminal and the metal part and the frame A step of preparing a lead frame plated with the entire outer surface including a portion;
Forming an insulating case with an insert mold so as to expose the external terminal and the metal part;
Separating the metal part from the frame part,
In the step of molding the insulating case, in the insulating case, the exposed part of the metal part is a part of the external terminal and is disposed at a position different from a part exposed from the insulating case, An electronic component characterized in that the exposed part of the metal part and a part of the external terminal that is exposed from the insulating case are insert-molded so as to be separated by a part of the insulating case . Production method.

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