JP2010153460A - Coil component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coil component in which a conductive member is reliably fixed to a magnetic core and ground connection is executed. <P>SOLUTION: The magnetic core 1a to be used in the coil component is structured such that a hole 1c passing through an outer periphery close to the outer peripheral corner of the magnetic core 1a in an E shape and a notch 1d are connected to each other. Also, a ground connection terminal 2a has an external shape which is a T shape in the view from an X direction and is a roughly L shape in the view from a Y direction, and has such a shape that the longitudinal side of a Z direction can be inserted to the hole 1c and the short side of a Y direction can be fitted to the notch 1d, the longitudinal side of the Z direction is used for ground connection, and the short side of the Y direction is used for terminal fixation. The ground connection terminal 2a is inserted, fitted and mounted to the through-hole 1c and the notch 1d of the magnetic core 1a in the E shape. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a winding component such as an insulation transformer used for an electronic device or a home appliance, and more particularly to prevent the magnetic material from being charged on the surface of the magnetic core due to the influence of electromagnetic action or leakage magnetic flux. The present invention relates to a winding component including a conductive portion that connects a core and a ground of a mounting board.

  It is known that winding parts such as transformers used in power supply circuits that are driven to switch at high frequencies are charged on the surface of the magnetic core due to the effects of electromagnetic action and leakage magnetic flux. In order to prevent the transformer performance from being adversely affected, it is necessary to ground the magnetic core to the ground of the mounting substrate or the electronic device housing.

  Conventionally, in such a winding component, for example, as in Patent Document 1, a lead wire or the like is used, and one end portion is directly or indirectly connected to the magnetic core, and the other end portion is connected to the ground. On the other hand, for example, as in Patent Document 2, a core grounding metal fitting for connecting the magnetic core to the earth is used, the core earthing metal fitting is sandwiched between the magnetic core and the bobbin, and the end thereof is grounded on the mounting substrate. Soldered to the pattern.

  FIG. 10 is a cross-sectional view illustrating a conventional winding component in which a magnetic core is grounded using a lead wire. FIG. 10 is a specific example disclosed in Patent Document 1.

  The winding component 14 incorporates the magnetic core 1 in the bobbin 3 around which the coil 4 is wound, and indirectly grounds the magnetic core 1 a to the ground via the earth angle 7 that is in close contact with the magnetic core 1. In the structure, one end of the lead wire 2 is connected to the earth angle 7 and the other end of the lead wire 2 is connected to the earth pattern of the mounting substrate 8.

  11A and 11B are diagrams for explaining a conventional winding component in which a magnetic core is grounded using a metal terminal, FIG. 11A is a side view, and FIG. 11B is a perspective view of the core ground metal. . FIG. 11 is a specific example disclosed in Patent Document 2.

  In the winding component 15, two U-shaped magnetic cores 1 a and 1 b are incorporated in the bobbin 3 around which the coil 4 is wound, and each is fixed by a wire-like core holding fitting 9. Further, the core ground metal fitting 2d is attached so as to be sandwiched between the magnetic core 1a and the bobbin 3, and its end is connected to the ground pattern of the mounting substrate 8. Since the core earth metal fitting 2d is drawn out while being in contact with the inner peripheral surface of the magnetic core 1a, it has a shape as shown in FIG.

Japanese Utility Model Publication 2-95195 Japanese Utility Model Publication 4-120220

  However, as in the case of Patent Document 1, in a winding component having a structure in which a core angle is attached to a magnetic core, one end thereof is connected using a lead wire, and the other end is grounded to the ground. Productivity was poor due to securing of contact between the body core surface and the core angle and work man-hours such as soldering with lead wires. In addition, there is a concern that the lead wire may be cut by mistake during handling.

  On the other hand, as in the case of Patent Document 2, in a winding component having a structure in which a core ground metal fitting is sandwiched between a magnetic core and a bobbin and an end of the core ground metal fitting is grounded to the ground, the magnetic core and bobbin Due to the gap size variation due to the clearance, the contact and fixing state between the core earth metal fitting and the magnetic core becomes uncertain, and there is a problem that the earth ground state is unstable.

  In order to solve the above-described problems, the present invention enables a stable ground connection by securely fixing the magnetic core and the conductive member, and also enables connection such as soldering when lead wires are wired. It is an object of the present invention to provide a winding component that can reduce the man-hours of work, disconnection, damage, etc., and simplify the assembly work of the magnetic core and the fixing work of the conductive member and improve the efficiency.

  In the present invention, a hole for attaching a conductive member to be connected to the ground on the mounting board or an attachment portion consisting of a notch is formed on the outer periphery of the magnetic core so that the magnetic core and the conductive member are securely connected. By attaching to the conductive member, mounting of the conductive member can be performed at the same time as normal magnetic core assembly work, and the work can be simplified and improved in efficiency, and a stable ground connection state can be secured. Can do.

  In the present invention, a metal plate or metal fitting (hereinafter referred to as “earth connection terminal”) whose outer shape is cut and bent into an L shape, a T shape, an inverted J shape, or the like is used as the conductive member. . On the other hand, the shape and form of the hole and notch formed in the magnetic core are also substantially the same as the ground connection terminal so that the ground connection terminal can be inserted and fitted. With such a structure, even if a conductive member is attached, the adhesion of each magnetic core is increased without expanding the outer dimensions of the magnetic core, and can be securely fixed, contributing to the stability and maintenance of the ground connection state. it can.

  According to the present invention, there is provided a winding component including a conductive member for incorporating a magnetic core into a bobbin around which at least one coil is wound, and connecting the magnetic core to ground. An attachment portion for mounting and fixing the conductive member is formed on an outer peripheral portion excluding the magnetic leg portion inserted and disposed on the bobbin, and the attachment portion is a hole portion, a notch portion, or a hole portion. A winding component characterized by comprising a notch is obtained.

  According to the present invention, it is possible to obtain a winding component in which the attachment portion includes a hole portion and a notch portion that are connected to each other.

  In the present invention, a hole for attaching a ground connection terminal as a conductive member to be connected to the ground on the mounting substrate, or a mounting portion including a notch is formed on the outer periphery of the magnetic core, Compared to the conventional structure using lead wires and the structure in which the ground connection terminal is sandwiched between the magnetic core and bobbin, the ground connection terminal is attached to the ground connection terminal securely. It can be performed simultaneously with the core assembling work, so that the work can be simplified and improved in efficiency, and a stable ground connection state can be ensured.

  Embodiments of the present invention will be described with reference to the drawings.

  1A and 1B are diagrams illustrating the structure of a magnetic core according to the present invention and a ground connection terminal as a conductive member. FIG. 1A is a perspective view of the magnetic core, and FIG. A perspective view and FIG.1 (c) each show the perspective view of the state which mounted | wore the magnetic body core with the earth connection terminal.

  FIG. 2 is a perspective view immediately after the magnetic core is incorporated into a horizontal bobbin using the magnetic core and the ground connection terminal according to the present invention.

  FIG. 3 is a diagram for explaining the horizontal winding component of the present invention. FIG. 3 (a) is a perspective view immediately after the outer periphery of the magnetic core is wound with an adhesive tape, and FIG. 3 (b) is an adhesive. The completed perspective view after tape cutting is shown, respectively.

  The magnetic core 1a shown in FIG. 1A has a structure in which a hole 1c and a notch 1d penetrating the outer peripheral portion near the outer peripheral corner of the E-type magnetic core 1a are connected to each other. is there. The hole 1c and the notch 1d need to be provided in addition to the middle leg portion inserted into the bobbin of the E-type magnetic core 1a so as to be fitted to the ground connection terminal 2a.

  The ground connection terminal 2a shown in FIG. 1 (b) is T-shaped when viewed from the X direction, and is substantially L-shaped when viewed from the Y direction. The short side in the Y direction is inserted into the hole 1c and has a shape that can be fitted into the notch 1d. The long side in the Z direction is used for grounding, and the short side in the Y direction is Used for fixing terminals. The ground connection terminal 2a is indicated by hatching.

  As shown in FIG. 1 (c), the ground connection terminal 2a is inserted, fitted, and attached to the through hole 1c and the cutout 1d of the E-type magnetic core 1a.

Thereafter, as shown in FIG. 2, the middle leg portion of the E-type magnetic core 1a in which the ground connection terminal 2a is mounted on the core portion of the bobbin 3 around which one or more coils 4 are wound. And the other leg of the magnetic core 1b are inserted and arranged, and as shown in FIG. 3A, the outer periphery of the magnetic cores 1a and 1b is wound with an adhesive tape 6 to At the same time that the body core 1a and the magnetic body core 1b are fixed, the magnetic body core 1a and the ground connection terminal 2a are also fixed, and the adhesive tape 6 is cut as shown in FIG. Is completed.
When fixing the E-type magnetic cores 1a and 1b or fixing the magnetic core 1a and the ground connection terminal 2a, an adhesive may be used in addition to the adhesive tape. Both adhesives may be used.

  4A and 4B are diagrams for explaining the structure of a magnetic core according to the present invention and a ground connection terminal as a conductive member. FIG. 4A is a perspective view of the magnetic core, and FIG. A perspective view and FIG.4 (c) each show the perspective view of the state which mounted | wore the magnetic body core with the ground connection terminal.

  FIG. 5 is a perspective view immediately after the magnetic core is incorporated into a horizontal bobbin using the magnetic core and the ground connection terminal according to the present invention.

  6A and 6B are diagrams illustrating the horizontal winding component of the present invention. FIG. 6A is a perspective view immediately after the outer periphery of the magnetic core is wound with an adhesive tape, and FIG. 6B is an adhesive. The completed perspective view after tape cutting is shown, respectively.

  The magnetic core 1a shown in FIG. 4 (a) has a structure in which a notch 1d is provided in the outer peripheral portion near the outer peripheral corner of the E-type magnetic core 1a. In this case, the notch 1d is It is necessary to provide other than the middle leg portion inserted into the bobbin of the E-type magnetic core 1a.

The ground connection terminal 2b shown in FIG. 4 (b) is T-shaped when viewed from the X direction and L-shaped when viewed from the Y direction, and is short in the X and Y directions. And the long side in the Z direction can be fitted into the notch 1d, the long side in the Z direction is for grounding, and the short side in the X and Y directions is a terminal. Used for fixing.
The ground connection terminal 2b is indicated by hatching.

  As shown in FIG. 4C, the ground connection terminal 2b is fitted and attached to the notch 1d of the E-type magnetic core 1a.

Thereafter, as shown in FIG. 5, the middle leg portion of the E-type magnetic core 1a in which the ground connection terminal 2b is mounted on the core portion of the bobbin 3 around which one or more coils 4 are wound. And the middle leg portion of the other magnetic core 1b are respectively inserted and arranged. Further, as shown in FIG. 6 (a), the outer peripheral portions of the magnetic cores 1a and 1b are wound with the adhesive tape 6, and the magnetic core 1a and the magnetic core 1b are fixed simultaneously with the magnetic core 1a and the ground connection. The terminal 2b is also fixed, and the adhesive tape 6 is cut as shown in FIG. 6B to complete the winding component 12.
When fixing the E-type magnetic cores 1a and 1b, or fixing the magnetic core 1a and the ground connection terminal 2b, an adhesive may be used in addition to the adhesive tape. Both adhesives may be used.

  7A and 7B are diagrams for explaining the structure of the magnetic core according to the present invention and the ground connection terminal as a conductive member. FIG. 7A is a perspective view of the magnetic core, and FIG. A perspective view and FIG.7 (c) each show the perspective view of the state which mounted | wore the magnetic body core with the earth connection terminal.

  FIG. 8 is a perspective view immediately after the magnetic core is incorporated into a vertical bobbin using the magnetic core and the ground connection terminal according to the present invention.

  FIG. 9 is a diagram for explaining the vertical winding component of the present invention. FIG. 9A is a perspective view showing a state immediately after the outer periphery of the magnetic core is wound with an adhesive tape, and FIG. The completed perspective view after adhesive tape cutting is shown, respectively.

  The magnetic core 1a shown in FIG. 7A has a structure in which a hole 1c and a notch 1d that do not penetrate the outer peripheral corner of the E-type magnetic core 1a are connected to each other. The hole portion 1c and the cutout portion 1d need to be provided in addition to the middle leg portion that is inserted into the bobbin of the E-type magnetic core 1a.

The ground connection terminal 2c shown in FIG. 7 (b) is T-shaped when viewed from the X direction, and L-shaped when viewed from the Y direction. It has a shape that can be inserted into the hole 1c that does not pass through, and the short side in the X direction can be fitted into the notch 1d, and the long side in the Y direction is for grounding, and the short side in the Y direction The side (Z direction) is used for terminal fixing.
The ground connection terminal 2c is indicated by hatching.

  As shown in FIG. 7C, the ground connection terminal 2c is inserted, fitted, and attached to the hole 1c and the notch 1d that do not pass through the E-type magnetic core 1a.

Thereafter, as shown in FIG. 8, the middle leg portion of the E-type magnetic core 1a in which the ground connection terminal 2c is mounted on the core portion of the bobbin 3 around which one or more coils 4 are wound. Are inserted from the bobbin terminal 5 side, that is, the mounting side, and the middle leg portion of the other E-type magnetic core 1b is inserted from the opposite side to the bobbin terminal 5.
Further, as shown in FIG. 9A, the outer peripheral portions of the magnetic cores 1a and 1b are wound with the adhesive tape 6, and the magnetic core 1a and the magnetic core 1b are fixed simultaneously with the magnetic core 1a and the ground connection. The terminal 2c is also fixed, and the adhesive tape 6 is cut as shown in FIG.
When fixing the E-type magnetic cores 1a and 1b, or fixing the magnetic core 1a and the ground connection terminal 2c, various adhesives may be used in addition to the adhesive tape. And an adhesive may be used. Here, the thickness of the ground connection terminal is smaller than the width of the magnetic core 1a, the contact area with the adhesive tape becomes very small, and sufficient fixing cannot be performed. is there.

  The magnetic cores 1a and 1b are preferably made of a Mn—Zn or Ni—Zn based ferrite material having a high magnetic permeability and low loss magnetic property and suitable for high frequencies. In addition, a magnetic material such as a dust core and amorphous material may be used, and it is preferable to select a material in accordance with the magnetic characteristics according to the application. Appearance shape may be either EE type or EI type, and the shape of the middle leg may be any of square, polygon, and substantially circular, but in the case of a horizontal type winding component that is particularly effective for low profile type, A rectangular shape or an oval shape is preferable.

The hole 1c may or may not penetrate. The shape of the hole may be any of a wedge shape, a polygonal shape, a circular shape, an ellipse shape, and the like, and a shape similar to the shape of the ground connection terminal is more suitable from the viewpoint of fitting and adhesion to the magnetic core.
In addition, the portion where the hole is formed is the outer peripheral portion excluding the magnetic leg portion inserted and arranged in the bobbin core portion of the magnetic core, the magnetic flux is difficult to pass through, and the outer peripheral portion of the magnetic core that hardly adversely affects the magnetic properties, It is preferable that the outer peripheral corner portion and the side surface portion be used, and appropriate determination can be made in consideration of insulation with the coil 4 and the bobbin terminal 5.

  The cut-out portion 1d may have any shape such as a wedge shape, a polygonal shape, a circular shape, and an oval shape. However, the cutout portion 1d has a shape similar to that of the ground connection terminals 2a, 2b, and 2c in view of fitting and adhesion to the ground connection terminal. Is preferred. Further, as in the case of the above hole, the portion where the notch is formed is the outer peripheral portion excluding the magnetic leg portion inserted into the bobbin core portion of the magnetic core, so that the magnetic flux hardly passes and the magnetic characteristics are hardly adversely affected. The outer periphery, the outer periphery corner, and the side surface of the magnetic core are preferably used, and can be appropriately determined in consideration of the insulation with the coil 4 and the bobbin terminal 5.

The ground connection terminals 2a, 2b and 2c as the conductive members are made of copper-clad steel wire (CP wire), hard copper wire, stainless steel, etc., which have appropriate rigidity and conductivity, and are versatile and cost-effective. It is preferable to punch a metal plate made of The external shape can be appropriately adjusted according to the shape of the hole 1c and the notch 1d formed in the magnetic core, such as an I shape, an L shape, and an inverted J shape. Moreover, it can be set as the shape which performed the bending process suitably according to the shape of an adjacent bobbin, and the insertion position to a mounting board | substrate. The cross-sectional shape may be any of a circular shape, a square shape, a polygonal shape, and the like, but it is preferable to have a rectangular shape such as a thin plate in order to ensure an appropriate rigidity from the ease of insertion into the mounting substrate. Note that not only the metal plate having a relatively low degree of bending, but also a lead wire having flexibility in bending may be used.
When fixing to the magnetic core, any method that can securely fix it can be used. Use an adhesive tape or an adhesive, or use a spring to apply pressure to part of the hole or notch to connect the ground connection terminal. The joint portion with the magnetic core may be appropriately modified. Furthermore, the magnetic core may be retrofitted or sintered with the ground connection terminal attached.

The bobbin 3 may be made of any epoxy-based or phenol-based thermosetting resin, polypropylene (PP), polystyrene (PS), polybutylene terephthalate (PBT), or nylon-based thermoplastic resin.
The cross-sectional shape of the winding core portion may be any of a square shape, a polygonal shape, and a substantially circular shape. However, in the case of a horizontal winding component that is particularly effective for a low profile, it is preferable to have a rectangular shape or an oval shape. Furthermore, in order to avoid mechanical damage to the insulating film of the winding material from the viewpoint of insulation, it is more desirable that the corner portion has a cross-sectional shape having a C surface or an R surface.

  The coil 4 may be selected and used as appropriate according to requirements, such as a general insulated wire such as an inexpensive and general-purpose polyurethane-coated wire (UEW wire), a reinforced insulated wire having high insulating properties, a special wire, etc. it can. It is also preferable to adjust the number of coils, the number of turns, the wire diameter, and the like.

  The bobbin terminal 5 is preferably made of a copper-clad steel wire (CP wire) or a hard copper wire, which is made of a material having moderate rigidity and conductivity, and is versatile and excellent in cost. Further, the cross-sectional shape may be any of circular, square, polygonal and the like.

  The pressure-sensitive adhesive tape 6 is appropriately selected in consideration of heat resistance, using a flexible thermoplastic resin such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and polyimide (PI). Is preferred. Further, a film-like tape is desirable for thinning, and the thickness is preferably about 20 μm to 50 μm having a mechanical strength and an insulation strength enough to prevent the substrate from being too thin. The adhesive layer may be made of any resin such as acrylic, rubber or epoxy, and the layer thickness is preferably about 10 μm to 30 μm for thinning. Further, the number of windings is preferably about 2 to 3 turns, which is sufficient for the fixing force of the magnetic core.

  Hereinafter, it explains in full detail using an Example.

  As the magnetic cores 1a and 1b, one set (two) of E-type Mn—Zn ferrite cores having an outer shape of 17.5 × 7 × 5 mm and a rectangular middle leg shape is prepared. As shown in FIG. 1, a square-shaped through-hole 1c having a side of 0.5 mm and a notch 1d having a length of 1 mm, a length of 0.5 mm, and a depth of 0.3 mm are provided on the outer periphery of Were connected to each other.

  As shown in FIG. 1, the ground connection terminal 2a is T-shaped when viewed from the X direction and from the Y direction so that it can be inserted and fitted into the through hole and the notch of the magnetic core 1a. When viewed, the shape was L-shaped, the material was stainless steel, the T-shaped short side was 1 mm, the T-shaped long side was 10 mm, and the L-shaped short side was 0.3 mm.

  As bobbin 3, a phenolic thermosetting resin is used, a winding frame having a winding width of 8 mm and a winding depth of 1.5 mm, a rectangular frame having a length of 8 mm, a height of 3 mm, and a corner having a radius of curvature of 0.5 mm. A horizontal bobbin having a winding core portion having a cross-sectional shape of the above, and as a bobbin terminal 5, a copper-clad steel wire (CP wire) having an outer diameter of 0.6φ, a length of 7 mm, and 0.6φ whose surface is solder-plated is used. Two pieces that were press-fitted on the mounting surface side of both flanges were provided.

  On the winding frame of the bobbin 3, 290 turns of a polyurethane-coated wire (UEW wire) having a wire diameter of 0.1φ is wound as a coil 4, and a polyurethane-coated wire (UEW wire) having a wire diameter of 0.3φ is formed on the upper layer. Was wound 13 turns. Two layers of adhesive tape 6 having a width of 8 mm and a thickness of 50 μm each having an acrylic adhesive layer and a base material of polyethylene terephthalate (PET) were applied to the interlayer and outermost layer of each coil. In addition, each coil was connected to a bobbin terminal 5 embedded opposite to each other via a winding frame.

  Thereafter, the binding portion of the bobbin terminal 5 is soldered, and finally, the E-shaped magnetic cores 1a and 1b are inserted into the winding core portion of the bobbin 3 and the middle leg portions are respectively inserted and arranged around the outer periphery of the magnetic core. The horizontal winding of the present invention shown in FIG. 3B is fixed by winding with an adhesive tape 6 having a width of 5 mm and a thickness of 50 μm having a base material of polyethylene terephthalate (PET) and an acrylic adhesive layer. Part 11 was produced.

(Comparative example)
The same horizontal type bobbin as in the example, the same member, the same winding specification, and the winding component of Comparative Example 1 of the conventional structure directly connected to the magnetic core using the UEW wire as the ground connection terminal, and the ground connection The winding parts of Comparative Example 2 having a conventional structure in which the terminal was sandwiched between the bobbin and the magnetic core were produced.

  The total work time (seconds) of the magnetic core fixing work and the ground connection terminal mounting work for the winding parts of the example, comparative example 1 and comparative example 2 manufactured as described above, magnetic core and ground The contact state of the connection terminal was confirmed by hand, and the comparison result when n = 5 is shown in Table 1. The mounting work time (seconds) was an average value of n = 5.

  As shown in Table 1, in the example of the present invention, it was found that the total working time can be reduced by about 40% and the contact state is good as compared with the conventional comparative example 1.

  The embodiments of the present invention have been described above using the embodiments. However, the present invention is not limited to these embodiments, and the present invention is not limited to the scope of the present invention. Included in the invention. That is, various changes and modifications that can be naturally made by those skilled in the art are also included in the present invention.

  According to the present invention, in a winding component such as an insulating transformer equipped with an earth connection terminal for preventing static electricity mounted on various electronic devices, the work of the earth connection terminal can be reduced, the work can be simplified, and the earth can be reliably grounded. A small, high-performance insulation transformer that can be connected and secures and maintains a stable connection state, and is especially mounted in small chargers and thin TVs of portable terminal devices such as phones, digital cameras, and game consoles. It is possible to provide a winding component suitable for the above.

The figure explaining the structure of the magnetic body core by this invention, and a ground connection terminal. 1A is a perspective view of a magnetic core, FIG. 1B is a perspective view of a ground connection terminal, and FIG. 1C is a perspective view of a state in which the ground connection terminal is mounted on the magnetic core. The perspective view immediately after incorporating a magnetic body core into a horizontal bobbin using the magnetic body core and ground connection terminal by this invention. The figure explaining the horizontal type | mold winding component by this invention. FIG. 3A is a perspective view showing a state immediately after the outer periphery of the magnetic core is wound with an adhesive tape, and FIG. 3B is a completed perspective view after cutting the adhesive tape. The figure explaining the structure of the magnetic body core by this invention, and a ground connection terminal. 4A is a perspective view of the magnetic core, FIG. 4B is a perspective view of the ground connection terminal, and FIG. 4C is a perspective view of a state in which the ground connection terminal is mounted on the magnetic core. The perspective view immediately after incorporating a magnetic body core into a horizontal bobbin using the magnetic body core and ground connection terminal by this invention. The figure explaining the horizontal type | mold winding component by this invention. 6A is a perspective view of a state immediately after the outer periphery of the magnetic core is wound with an adhesive tape, and FIG. 6B is a completed perspective view after cutting the adhesive tape. The figure explaining the structure of the magnetic body core by this invention, and a ground connection terminal. FIG. 7A is a perspective view of the magnetic core, FIG. 7B is a perspective view of the ground connection terminal, and FIG. 7C is a perspective view of a state where the ground connection terminal is mounted on the magnetic core. The perspective view immediately after incorporating the magnetic body core into the vertical bobbin using the magnetic body core and ground connection terminal by this invention. The figure explaining the vertical type | mold winding component by this invention. FIG. 9A is a perspective view of a state immediately after the outer periphery of the magnetic core is wound with an adhesive tape, and FIG. 9B is a completed perspective view after cutting the adhesive tape. The figure explaining the conventional winding component which earth | grounded the magnetic body core using the lead wire. The figure explaining the conventional winding components which earth | grounded the magnetic body core using the metal fitting terminal. Fig.11 (a) is a side view, FIG.11 (b) is a perspective view of a core earth metal fitting.

DESCRIPTION OF SYMBOLS 1, 1a, 1b Magnetic body core 1c Hole part 1d Notch part 2 Lead wire 2a, 2b, 2c Ground connection terminal 2d Core grounding metal fitting 3 Bobbin 4 Coil 5 Bobbin terminal 6 Adhesive tape 7 Ground angle 8 Mounting board 9 Core holding metal fitting 11 , 12, 13, 14, 15 Winding parts

Claims (2)

  A winding part including a magnetic core incorporated in a bobbin around which at least one coil is wound, and a conductive member for connecting the magnetic core to a ground, wherein the magnetic core is inserted into the bobbin. An attachment part for mounting and fixing the conductive member is formed on the outer peripheral part excluding the magnetic leg part arranged, and the attachment part is composed of a hole part, a notch part, or a hole part and a notch part. Winding parts characterized by   The winding part according to claim 1, wherein the attachment part includes a hole part and a notch part connected to each other.

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