Coil component and electrical device with coil component

Abstract

The invention relates to a coil component and an electrical device with the coil component. A coil component (1) is mounted by being partially inserted into a printed circuit board (2) having a mounting hole formed in the thickness direction (the mounting direction of the coil component (1)). A coil component (1) is provided with: a core; a coil (5) wound around the core; a base part (4) for holding the core; and a plurality of mounting terminals (6W, 6X, 6Y, 6Z), at least some of which can be electrically connected to the coil (5) and the printed circuit board (2), the plurality of mounting terminals being held by the base part (4). The base part (4) has an elastically deformable locking piece (locking claw (7)). The locking piece (locking claw (7)) can pass through the mounting hole by means of elastic deformation, and can be locked to the edge of the mounting hole by means of elastic recovery.

Description

[0001] This application is a divisional application with an international application date of May 13, 2020 (date of entering the Chinese national phase: December 31, 2021), an international application number of PCT / JP2020 / 019090 (national application number: 202080048386.7), and an invention name of "Coil components, electrical equipment with coil components, and coil component installation method". Technical Field

[0002] The present invention relates to a coil component, an electric device with a coil component including the coil component and a printed circuit board, and a method for mounting the coil component. Background Art

[0003] Keyless entry systems are becoming practical, which can lock or unlock a car, house, or other door without directly touching the door by transmitting and receiving signal waves. In order to realize the keyless entry system, coil antennas such as LF (low frequency) transmission antennas that can transmit and receive signal waves are widely used. In addition, coil antennas are also widely used in so-called radio-wave clocks that use radio waves to accurately adjust the time.

[0004] In addition, a coil component composed of a magnetic core and a wound coil is preferably used for a coil antenna.

[0005] For example, a coil component (described as an antenna device in Patent Document 1) used for a keyless entry system is disclosed in Patent Document 1. This coil component is mounted on a vehicle by fitting a locking body to the lower surface of a housing as a component.

[0006] The coil component is provided with a connector portion into which a connector of a control device provided on the vehicle side is inserted, and the control device is installed via the connector portion. The connector portion constitutes a part of the cylindrical open cover body, and a connection terminal connected to the antenna body is formed so as to protrude inward.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: Japanese Patent Application Publication No. 2011-205616 Summary of the invention

[0010] Problem that the invention aims to solve

[0011] However, the keyless entry system is also used in vehicles such as motorcycles that are subjected to large vibrations. However, when the LF transmission antenna is provided on a printed circuit board, when large vibrations are repeatedly applied in such an environment, it is difficult to ensure vibration resistance due to the weight of the antenna.

[0012] In this regard, in order to ensure the vibration resistance of the coil component, the coil component and the control device need to be separate bodies as described above and be mounted separately on the vehicle.

[0013] Therefore, it is necessary to secure a place to install the coil component independently of the control device, which accordingly increases the number of installation locations, increases the labor and time required for installation, and requires securing an installation range, which may affect vehicle design.

[0014] The present invention has been made in view of the above-mentioned problems, and provides a coil component, an electric device having a coil component, and a coil component mounting method that can appropriately install a coil component and a printed circuit board in an operating device such as a vehicle.

[0015] Solutions for solving problems

[0016] According to the present invention, a coil component is provided, which is a coil component installed on a printed circuit board having a mounting hole formed in the thickness direction, and comprises: a core; a coil wound around the core; a base portion for holding the core; and a plurality of mounting terminals, at least a portion of which can be electrically connected to the coil and the printed circuit board, the plurality of mounting terminals being held on the base portion, and the base portion having a locking piece that can be elastically deformed, and the locking piece can pass through the mounting hole by elastic deformation.

[0017] Furthermore, according to the present invention, there is provided an electric device with a coil component including the coil component and the printed circuit board.

[0018] In addition, according to the present invention, a coil component installation method is provided, in which the coil component and the printed circuit board are prepared, and the coil component installation method comprises the following steps: a joining step, in which at least a portion of the metal terminal portion is joined to the end of the coil; an installation step, in which the locking piece is passed through the installation hole by elastically deforming the locking piece; and a locking step, in which after the installation step, the locking piece is elastically restored so that it is locked to the edge of the installation hole, and in the joining step, at least a portion of the metal terminal portion is melted by welding to join the end of the coil locked to the metal terminal portion.

[0019] Effects of the Invention

[0020] According to the present invention, it is possible to provide a coil component, an electric device having a coil component, and a coil component mounting method that can appropriately install a coil component and a printed circuit board in an operating device such as a vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of the antenna device.

[0022] Figure 2 It is a perspective view showing the bottom side of the antenna device.

[0023] Figure 3 It is a perspective view showing the front side of the antenna device.

[0024] Figure 4 It is a perspective view showing the back side of the antenna device.

[0025] Figure 5 It means to keep the claws. Figure 4 An enlarged view of the V portion.

[0026] Figure 6 This is a schematic front view showing a state in which the locking claw and the anti-collision rib are locked in the mounting hole of the printed circuit board.

[0027] Figure 7 It is a schematic bottom view showing a state where the locking claw and the anti-collision rib are locked in the mounting hole of the printed circuit board.

[0028] Figure 8 (a) means Figure 1 FIG. 8 is a diagram of a metal terminal portion of section VIII, and is a schematic front view showing a state before the end of the coil is wound, Figure 8 (b) means Figure 1 Part VIII is a diagram of the metal terminal portion, and is a schematic right side view showing a state before the end portion of the coil is wound.

[0029] Fig. 9 (a) means Figure 1 The figure is a diagram of the metal terminal portion of part VIII, and is a schematic front view showing the state after the end of the coil is wound, Fig. 9 (b) means Figure 1 1 is a diagram of the metal terminal portion of part VIII, and is a schematic right side view showing the state after the end portion of the coil is wound.

[0030] Fig.10 (a) means Figure 1 , which is a schematic front view showing the state after the metal terminal portion and the end portion of the coil are welded, Fig.10 (b) means Figure 1 1 is a diagram of the metal terminal portion of part VIII of the coil, and is a schematic right side view showing a state after the metal terminal portion and the end portion of the coil are welded.

[0031] Fig.11It is a perspective view showing, in an enlarged manner, the surroundings of pads on which the capacitor chip is mounted.

[0032] Fig.12 It is a perspective view showing a state where a capacitor chip is mounted on a pad.

[0033] Fig.13 It is a perspective view showing a lead frame and a capacitor chip mounted on a portion of the lead frame.

[0034] Fig.14 (a) is a schematic front view showing the area around the pad before mounting the capacitor chip. Fig.14 (b) is a schematic front view showing the area around the pad after the capacitor chip is mounted.

[0035] Fig.15 (a) is a schematic front view showing an example in which a through hole is formed at a position inside the edges of a pair of opposing pads in the first direction. Fig.15 (b) is a schematic front view showing an example in which a through hole is formed at a position inside the capacitor chip in the second direction.

[0036] Fig.16 This is a schematic front view showing a through hole formed across a pair of pads for mounting a capacitor chip and a pair of pads for mounting a chip resistor. DETAILED DESCRIPTION

[0037] Hereinafter, embodiments of the present invention will be described based on the drawings.

[0038] In addition, the embodiment described below is only an example to make the present invention easy to understand, and is not used to limit the present invention. That is, the shape, size, configuration, etc. of the components described below can be changed and improved without departing from the gist of the present invention, and, of course, its equivalent is included in the present invention.

[0039] In addition, the various constituent elements of the present invention do not need to exist independently of each other, and the following situations are allowed: a plurality of constituent elements constitute a single constituent element; a constituent element is formed by dividing into a plurality of constituent elements; a certain constituent element is a part of other constituent elements; a part of a certain constituent element overlaps with a part of other constituent elements.

[0040] In addition, in all the drawings, the same reference numerals are marked on the same components, and repeated descriptions are appropriately omitted. In addition, in this specification, there are situations where the up and down directions are specified for explanation, which is set expediently to explain the relative relationship of the components and is not used to limit the direction of the product of the present invention when it is manufactured or used. In particular, in this embodiment, the installation direction is set to be the downward direction, and the opposite direction is the upward direction, which is not necessarily consistent with the up and down direction in the gravity direction.

[0041] <Overview of Coil Components>

[0042] First, the main reference Figure 1 to Figure 4 Next, the outline of the coil component 1 will be described.

[0043] Figure 1 1 is a front view of an antenna device 1X (coil component 1) in this embodiment. Figure 2 It is a perspective view showing the bottom surface of the antenna device 1X. Figure 3 1 is a perspective view showing the front side of the antenna device 1X. Figure 4 It is a perspective view showing the back side of the antenna device 1X.

[0044] The coil component 1 is a component that is partially inserted and mounted on a printed circuit board 2 having a mounting hole 2 a formed in the thickness direction (the mounting direction of the coil component 1 ).

[0045] The coil component 1 comprises: a core 3; a coil 5 wound around the core 3; a base portion 4 for holding the core 3; and a plurality of mounting terminals 6W, 6X, 6Y, 6Z discussed later, at least a portion of which (mounting terminals 6X, 6Y, 6Z) are capable of conducting with the coil 5 and the printed circuit board 2, and the plurality of mounting terminals 6W, 6X, 6Y, 6Z are held on the base portion 4.

[0046] The base portion 4 has an elastically deformable locking piece (locking claw 7). The locking piece (locking claw 7) is characterized in that it can pass through the mounting hole 2a by elastic deformation and can be locked to the edge of the mounting hole 2a by elastic restoration.

[0047] The electric device with a coil component (antenna device 1X) includes a coil component 1 and a printed circuit board 2 .

[0048] As described above, by locking the locking piece (locking claw 7 ) to the edge of the mounting hole 2 a of the printed circuit board 2 , the influence of vibration between the coil component 1 and the printed circuit board 2 can be alleviated (reduced).

[0049] Specifically, when vibration is applied to the antenna device 1X, shaking between the coil component 1 and the printed circuit board 2 can be prevented, thereby suppressing the impact force applied therebetween. In addition, the vibration amplitude of the coil component 1 can be suppressed from increasing compared to the vibration amplitude of the printed circuit board 2.

[0050] Therefore, coil component 1 mounted on printed circuit board 2 can be indirectly mounted on a vehicle, etc., only by mounting printed circuit board 2 on a part of the vehicle, etc. Therefore, the number of locations where these components are installed on the vehicle, etc. can be reduced, and the installation range can be narrowed.

[0051] In the present specification, “vehicle etc.” refers to, for example, automobiles, motorcycles, ships, jet skis, aircraft, unmanned aerial vehicles such as drones, and refers to operating devices including mechanisms that can be operated using radio waves.

[0052] In addition, in the above content, it is also possible to divide a component into multiple components. For example, the base portion 4 is used to hold the core 3 and the mounting terminals 6W, 6X, 6Y, and 6Z, but multiple components can hold the core 3 and the mounting terminals 6W, 6X, 6Y, and 6Z respectively. In other words, the base portion 4 may not be a single component, but may be composed of multiple components.

[0053] Furthermore, although the configuration in which at least some of the mounting terminals 6W, 6X, 6Y, and 6Z can be electrically connected to the coil 5 and the printed circuit board 2 has been described, a configuration in which these can be electrically connected via other conductive members is also possible.

[0054] In addition, “the locking piece (locking claw 7) can pass through the mounting hole 2a by elastic deformation and can be locked to the edge of the mounting hole 2a by elastic restoration” means that the locking claw 7 cannot be locked to the edge of the mounting hole 2a in its natural state.

[0055] In addition, the "locking piece" is not limited to the claw-shaped locking claw 7 that is elastically deformed and elastically restored in the linear direction discussed later, and for example, it can also be a block-shaped locking member composed of multiple slices that are elastically deformed and elastically restored in the radial direction.

[0056] In this embodiment, the mounting terminals 6W, 6X, 6Y, and 6Z are respectively inserted through a plurality of through holes 2b (see Figure 2) and soldered to the printed circuit board 2 by soldering. The locking claw 7 is locked to the edge of the mounting hole 2a in an elastically deformed state as described above. Therefore, the vibration and impact applied to the solder portion of the mounting terminals 6W, 6X, 6Y, and 6Z can be mitigated to a degree corresponding to the load borne by the locking claw 7 among the loads generated by the vibration applied to the antenna device 1X. Therefore, it is easy to maintain the connection between the mounting terminals 6W, 6X, 6Y, and 6Z and the printed circuit board 2.

[0057] The mounting terminals 6X, 6Y, 6Z of the present embodiment are used for conducting with the conductor wiring of the printed circuit board 2 , while the mounting terminal 6W is not conducted with the conductor wiring of the printed circuit board 2 but is provided to more firmly mount the coil component 1 on the printed circuit board 2 .

[0058] For example, as long as the stability of the installation of the coil component 1 is sufficiently ensured by a pair of locking claws 7, the mounting terminal 6W is not an essential component, and as long as the component does not have the capacitor chip 12 discussed later, the mounting terminal 6Z is not an essential component. On the other hand, if the stability is not sufficiently ensured, a plurality of mounting terminals can be further provided.

[0059] <Core>

[0060] The core 3 is used to amplify the magnetic field generated by the coil 5. Figure 4 As shown, a part of the back side is exposed and a part of the back side is accommodated inside the base portion 4. The core 3 is formed longitudinally and has a flat cross-sectional shape (rectangular shape) including long sides 3a and short sides 3b in a cross section perpendicular to the longitudinal direction.

[0061] The cross-sectional shape of the core 3 in the present embodiment is a rectangular shape, but may be a cross-sectional shape with rounded corners or a cross-sectional shape with C-chamfered corners.

[0062] As materials for the core 3, there can be listed materials composed of ceramics with iron oxide as the main component (ferrite core), materials composed of amorphous alloys (amorphous core), materials formed by compression molding of metal powders (powdered iron core), materials formed by electrically insulating multiple electromagnetic steel plates and setting them as stacked structures (laminated core), etc.

[0063] The core 3 is mounted on the base portion 4 from the back side in a manner that the lower surface is supported by a support rib 4bb provided on the base 4b and is provided vertically along a vertical wall 4c to be discussed later. The details will be discussed later. In addition, the core 3 uses the upper surface and the back surface to receive the elastic restoring force from the retaining claws 8X and 8Y toward the front and downward, thereby maintaining the posture of the core 3.

[0064] <Coil>

[0065] The coil 5 is an element that mainly constitutes an inductance element in the series resonant circuit of the coil component 1 , and includes a first winding portion 5 a , a first path portion 5 b , a second winding portion 5 c , a second path portion 5 d , and a third winding portion 5 e .

[0066] The first winding portion 5a is an inductance element in the coil 5 and is a portion wound around the bobbin 4a. An insulating tape 14 for electrical insulation is wound around the outer periphery of the first winding portion 5a.

[0067] The first path portion 5 b forms a routing path from one end side of the first wound portion 5 a to a metal terminal portion 9X described later.

[0068] The second winding portion 5c is located on the destination side of the first path portion 5b and is wound around the metal terminal portion 9X.

[0069] The second path portion 5 d forms a routing path from the other end side of the first wound portion 5 a to a metal terminal portion 9Y to be described later.

[0070] The second winding portion 5e is located on the destination side of the second path portion 5d and is wound around the metal terminal portion 9Y.

[0071] <Base>

[0072] The base portion 4 is formed of an insulating raw material such as resin, and is a portion consisting of the following components: a coil frame 4a, which is located in the center in the longitudinal direction and is wound with the first winding portion 5a of the coil 5; and a base 4b, which is another portion and is formed on both sides of the coil frame 4a. The base portion 4 insulates the core 3 accommodated therein and the coil 5 wound around the coil frame 4a.

[0073] The bobbin 4a is formed in a C-shape with an angular cross section so that the central portion of the core 3 can be disposed inside the bobbin 4a, extends in the longitudinal direction, and constitutes a part of the standing wall 4c on the front side.

[0074] The base 4b includes: a bottom plate 4ba; another portion of the vertical wall 4c, which is erected upward from the end of the front side of the bottom plate 4ba; and side walls 4bc, which are erected upward from the ends of the bottom plate 4ba located on both sides of the longitudinal direction of the base portion 4.

[0075] The bottom plate 4ba is formed with a support rib 4bb which protrudes upward and extends in the transverse direction (depth direction) of the base 4 to a length longer than the length of the core 3, and is provided in plurality in the longitudinal direction of the base 4. The support rib 4bb is used to support the core 3 from below.

[0076] If the coil component 1 (base 4) vibrates, the core 3 also vibrates. In order to suppress the amplification of the vibration of the core 3 relative to the vibration of the base 4, as shown in FIG. Figure 4 and Figure 5 As shown, the base portion 4 (base 4 b ) has elastically deformable holding pieces (holding claws 8X, 8Y) that hold the core 3 by pressing it from above. Figure 5 It means the retaining claw 8X Figure 4 The holding pieces (holding claws 8X, 8Y) hold the core 3 in an elastically deformed state.

[0077] According to the above structure, the elastically deformed holding piece (holding claws 8X, 8Y) can always apply force to the core 3, which can make the fixing state of the core 3 relative to the base 4 more stable. In addition, the core 3 of this embodiment is completely bonded and fixed to the base 4 using an epoxy adhesive.

[0078] In addition, "the holding piece (holding claws 8X, 8Y) holds the core 3 in an elastically deformed state." In other words, it means that the holding piece (holding claws 8X, 8Y) can allow the core 3 to pass from the outside to the storage position through elastic deformation, and can hold the core 3 in the storage position through elastic recovery.

[0079] In detail, Figure 5 As shown, the holding claw 8X is formed so as to protrude rearward from a bridge portion 4ca provided at the upper end portion of the standing wall 4c.

[0080] More specifically, the holding claw 8X includes a base end portion 8Xa, an extension portion 8Xb extending obliquely rearward and downward from the base end portion 8Xa, and a tip portion 8Xc provided to the end of the extension portion 8Xb.

[0081] The tip portion 8Xc has an inclined surface that is inclined upward toward the back side, and is formed in an inverted triangular prism shape.

[0082] When the operator attaches the core 3 from the back side to the front side of the bobbin 4a along the standing wall 4c, the core 3 abuts against the upwardly inclined surface of the tip portion 8Xc and is further pressed, so that the holding claw 8X naturally elastically deforms upward.

[0083] When the core 3 is disposed at a position along the standing wall 4 c , the holding claws 8X elastically restore with the elastic restoring force remaining, and the extending portion 8Xb presses the back surface of the core 3 , thereby maintaining the disposed state of the core 3 .

[0084] The holding claw 8Y is arranged on the side opposite to the holding claw 8X across the coil frame 4a. Figure 4As shown, the rod 4bd is formed so as to protrude rearward from the inner end portion thereof, and the rod 4bd protrudes inward in the longitudinal direction from the upper end portion and the front end portion (front end portion) of the side wall 4bc.

[0085] More specifically, the structure of the holding claw 8Y is the same as that of the holding claw 8X, and therefore, the description thereof is omitted.

[0086] The core 3 is supported on the base portion 4 in a state where the core 3 stands upright with the long sides 3 a thereof facing the placement direction on the printed circuit board 2 .

[0087] Since the core 3 is supported by the base portion 4 in a state of being erected in this manner, the area in the surface direction of the printed circuit board 2 is not narrowed, and a mounting space for mounting the printed circuit board can be appropriately ensured.

[0088] The core 3 is not limited to a core that stands completely perpendicular to the printed circuit board 2, and may be a core that stands obliquely with an inclination of 20 degrees, for example.

[0089] <Locking claw>

[0090] Next, in addition to referring to Figure 4 In addition, the main reference Figure 6 and Figure 7 The locking claw 7 is described below. The locking claw 7 has a locking mechanism formed on the printed circuit board 2. Figure 2 The function of the rim of the mounting hole 2a is shown. Figure 6 1 is a schematic front view showing a state in which the locking claw 7 and the anti-collision rib 10 are locked in the mounting hole 2a of the printed circuit board 2. Figure 7 : is a schematic bottom view showing this state. Figure 7 The dotted line portion of the anti-collision rib 10 in FIG. 1 is used to indicate the shape before being pressed in (before being destroyed).

[0091] The base portion 4 is formed in the longitudinal direction as described above, and a pair of locking pieces (locking claws 7 ) are provided at both end portions (side walls 4 bc ) of the base portion 4 in the longitudinal direction.

[0092] In this way, by arranging the locking pieces (locking claws 7) at both ends of the base 4 in the longitudinal direction, the stress applied during locking can be applied to a larger range of the base 4, and the locking state of the base 4 relative to the printed circuit board 2 can be stabilized, which is preferred.

[0093] In particular, the pair of locking pieces (locking claws 7) are configured to be elastically deformable and elastically restored in opposite directions to each other and to be locked to the edges of the different mounting holes 2a.

[0094] With such a configuration, a worker can grasp the pair of locking claws 7 and press the base portion 4 inward in the longitudinal direction to insert the claws into the mounting hole 2 a .

[0095] In other words, the pair of locking claws 7 are disposed at positions where they can be housed and inserted into the mounting hole 2 a when elastically deformed.

[0096] The pair of locking claws 7 are disposed at positions intersecting with the edge of the mounting hole 2a when elastically restored (including a state in the process of restoration in addition to a natural state).

[0097] In addition, the pair of locking claws 7 may be elastically deformed toward the inner side in the longitudinal direction of the base portion 4 and elastically restored toward the outer side in the longitudinal direction, or the opposite structure may be adopted. In other words, the pair of locking claws 7 may be elastically deformed toward the outer side in the longitudinal direction of the base portion 4 and elastically restored toward the inner side in the longitudinal direction.

[0098] In addition, if the locking claw 7 is provided at least on one side in the longitudinal direction of the base portion 4, an elastic restoring force can be always given to the portion that swings more due to the longitudinal member, so that the vibration suppression is effective and appropriate, but the present invention is not limited to such a structure. For example, it can also be provided on at least one side in the transverse direction of the base portion 4.

[0099] Furthermore, the locking piece of the present invention is not limited to a pair of locking pieces, and only one of them may be an elastically deformable locking piece and the other may be a plastically deformable locking piece or a non-deformable locking piece.

[0100] The locking pieces (locking claws 7 ) extend in the same direction as the extending direction (downward direction in the present embodiment) of the mounting terminals 6W, 6X, 6Y, and 6Z as the mounting direction on the printed circuit board 2 .

[0101] The locking piece (locking claw 7 ) extends in the same direction as the extending direction of the mounting terminals 6W, 6X, 6Y, 6Z, so that when the coil component 1 is mounted on the printed circuit board 2 , the locking piece (locking claw 7 ) can be smoothly locked in the mounting hole 2 a .

[0102] Specifically, the leading end side (the extending portion 7 b and the leading end 7 c ) of the locking piece (locking claw 7 ) located on the bending destination side extends in the same direction as the mounting terminals 6W, 6X, 6Y, and 6Z.

[0103] More specifically, the locking piece (locking claw 7) protrudes outward in the longitudinal direction of the base portion 4 (protruding portion 7a) from a position above the central portion at the end portion (side wall 4bc) of the base portion 4 and extends (extending portion 7b) in a curved manner toward the mounting direction (downward in this embodiment) of the printed circuit board 2. In other words, the locking piece (locking claw 7) includes the extending portion 7b extending in the mounting direction of the printed circuit board 2.

[0104] Furthermore, the extending portion 7b is provided on the proximal side of a first inclined surface 7d to be described later.

[0105] The locking piece (locking claw 7) protrudes from a position above the central portion at the end of the base portion 4 and extends in a curved manner toward the placement direction of the printed circuit board 2, thereby increasing the restoring force corresponding to the bending amount compared to the locking piece extending from a position below the central portion. Therefore, the locking state between the locking claw 7 and the printed circuit board 2 can be stabilized.

[0106] Furthermore, the locking claw 7 may be a member extending linearly without having a curved portion connected to the protruding portion 7 a and the extending portion 7 b protruding outward in the longitudinal direction of the base portion 4 .

[0107] The end portion (top end portion 7c) of the locking piece (locking claw 7) has: a first inclined surface 7d, which is inclined toward the elastic recovery side as it moves toward the top end side; and a second inclined surface 7e, which is arranged at a position closer to the top end side than the first inclined surface 7d, and is inclined toward the elastic deformation side as it moves toward the top end side.

[0108] Specifically, the second inclined surface 7e extends toward the side where the locking claw 7 is elastically deformed (the inner side in the longitudinal direction of the base portion 4) with respect to (the inner surface of) the extending portion 7b.

[0109] In this way, as long as the first inclined surface 7d abuts against the edge of the mounting hole 2a of the printed circuit board 2, the end of the locking claw 7 is pressed in the loading direction relative to the printed circuit board 2 due to the reaction force applied from the edge of the mounting hole 2a to the elastic restoring force of the locking claw 7, and the locking state is stable. In addition, by forming the first inclined surface 7d as described above, when the first inclined surface 7d abuts against the edge of the mounting hole 2a and the locking claw 7 is in an elastically deformed state, the deflection amount of the top end portion 7c can be increased compared with the deflection amount of a member (not shown) having the same outer surface shape from the base end to the top end. Therefore, the elastic restoring force of the locking claw 7 can be increased.

[0110] Furthermore, by providing the second inclined surface 7 e , when the coil component 1 is mounted on the printed circuit board 2 , the locking claw 7 can be easily elastically deformed and inserted into the mounting hole 2 a .

[0111] Specifically, even if the outer edge of the mounting hole 2a is located closer to the center side than the inner side of the extension portion 7b (the center side of the coil component 1), as long as the second inclined surface 7e is in a positional relationship of contact with the outer edge of the mounting hole 2a, as long as the second inclined surface 7e and the mounting hole 2a are in such a positional relationship, a reaction force having a component toward the inner side of the longitudinal direction of the base portion 4 in the normal direction of the second inclined surface 7e will be applied to the locking claw 7 from the outer edge of the mounting hole 2a.

[0112] Therefore, by simply pressing the coil component 1 in the mounting direction, even without applying a load to the locking claw 7 in the inner direction, the locking claw 7 can be elastically deformed inward (toward the center of the coil component 1), and the locking claw 7 can be moved from the top end 7f (see Figure 4 ) is inserted into the mounting hole 2a.

[0113] The coil component 1 (the base 4 b of the base portion 4 ) has a contact portion (contact rib 11 ) that contacts the printed circuit board 2 when mounted on the printed circuit board 2 .

[0114] Specifically, the contact ribs 11 protrude downward from the lower surface of the bottom plate 4 ba , extend in the transverse direction of the base portion 4 , and are arranged in a plurality in the longitudinal direction of the base portion 4 .

[0115] When the contact portion (contact rib 11) contacts the printed circuit board 2, the end portion (top end portion 7c) of the locking piece (locking claw 7) contacts the edge of the mounting hole 2a of the printed circuit board 2 at the first inclined surface 7d.

[0116] According to the above configuration, the tip 7c of the locking claw 7 can be locked to the edge of the mounting hole 2a at the same position by making the abutting portion (abutting rib 11) abut against the printed circuit board 2. Therefore, the locking state of the locking claw 7 can be further stabilized.

[0117] The first inclined surface 7d is a portion of the tip portion 7c of the locking piece (locking claw 7) that contacts the edge of the mounting hole 2a of the printed circuit board 2 when the locking claw 7 elastically returns to its original shape after being elastically deformed and inserted into the mounting hole 2a of the printed circuit board 2.

[0118] <Mounting claw>

[0119] like Figure 6 and Figure 7 As shown in the figures, mounting claws 15 which can be inserted into the mounting holes 2a of the printed circuit board 2 together with the locking claws 7 are provided at positions inside the two locking claws 7 at both ends in the longitudinal direction of the base portion 4 so as to protrude downward (in the mounting direction) from the bottom plate 4ba.

[0120] The mounting claw 15 passes through the mounting hole 2a together with the locking claw 7 when the coil component 1 is mounted on the printed circuit board 2. The mounting claw 15 integrally includes: an inner wall 15a located inside the longitudinal direction of the base portion 4; a reinforcing wall 15b extending from the inner wall 15a; and supporting walls 15c and 15d extending from both ends of the reinforcing wall 15b in the longitudinal direction of the base portion 4 to both sides in the depth direction.

[0121] More specifically, the inner wall 15a is a plate extending in the depth direction of the base portion 4, and the reinforcing wall 15b is a plate extending from the center of the inner wall 15a in the depth direction to the outer side in the longitudinal direction of the base portion 4. In addition, the inner wall 15a and the reinforcing wall 15b extend in the mounting direction by the same amount, and the lengths of the supporting walls 15c and 15d are shorter than the lengths of the inner wall 15a and the reinforcing wall 15b.

[0122] As described above, the support wall 15c and the support wall 15d are provided at both ends of the reinforcing wall 15b in the longitudinal direction of the base portion 4 and are formed separately. The reason why the support wall 15c and the support wall 15d are formed separately in this way is to improve the molding accuracy in a manner that the wall thickness of the mounting claw 15 after molding is constant by preventing the occurrence of shrinkage during the injection molding of the base portion 4.

[0123] <Impact rib>

[0124] The base portion 4 includes a collision prevention rib 10 that can be broken and locked by abutting against the edge of the hole (mounting hole 2 a ) of the printed circuit board 2 .

[0125] The anti-collision rib 10 is locked to the edge of the hole (mounting hole 2 a ) of the printed circuit board 2 in a direction different from the locking direction of the locking piece (locking claw 7 ).

[0126] The anti-collision rib 10 can eliminate (minimize) the gap with the edge of the printed circuit board 2 , thereby suppressing the looseness of the coil component 1 relative to the printed circuit board 2 and stabilizing the locking state of the base 4 relative to the printed circuit board 2 .

[0127] The anti-collision rib 10 in this embodiment is formed of a resin having a lower hardness than the printed circuit board 2. The anti-collision rib 10 is provided at two locations 2 on both sides of each of the two mounting claws 15, for a total of eight locations, so as to protrude in the depth direction (the short side direction (width direction) of the mounting hole 2a which is a long hole).

[0128] The collision rib 10 protrudes from the outer surfaces of both sides of the support walls 15 c and 15 d of the mounting claw 15 in the depth direction and extends in the up-down direction.

[0129] In particular, Figure 6As shown, the collision rib 10 is formed so as to become narrower in width in the longitudinal direction of the base portion 4 from the center portion in the vertical direction toward the bottom.

[0130] By forming it in this way, the load applied to the collision rib 10 from the edge surface of the mounting hole 2a can be gradually increased from the time when the mounting claw 15 (collision rib 10) starts to be inserted into the mounting hole 2a.

[0131] That is, the load at the start of inserting the collision rib 10 into the mounting hole 2a can be suppressed to be small, and the locking claw 7 can be smoothly inserted into the mounting hole 2a.

[0132] Furthermore, the collision rib 10 includes at least a portion provided above the lower end of the first inclined surface 7 d and is formed in a wedge shape so that the amount of protrusion decreases from the center in the vertical direction toward the lower side.

[0133] By forming the anti-collision rib 10 in this way, the load at the start of inserting the anti-collision rib 10 into the mounting hole 2a can be suppressed to a lower level, and the locking claw 7 can be smoothly inserted into the mounting hole 2a.

[0134] In addition, the anti-collision rib 10 is as shown in Figure 7 As shown by the dotted line in the figure, the rib 10 is formed into a tapered shape that tapers toward the tip side in the depth direction. With such a structure, the load for destroying the tip portion of the collision rib 10 can be suppressed to be small.

[0135] For example, if the length of the mounting claw 15 and the length of the mounting hole 2 a in the depth direction are completely consistent, no gap will be generated therebetween, and therefore, the anti-collision rib 10 may not be required.

[0136] However, if manufacturing errors are taken into consideration, it is difficult to manufacture such components in large quantities. Therefore, by adopting the anti-collision rib 10, the anti-collision rib 10 is destroyed due to the load received from the edge of the mounting hole 2a, thereby eliminating the gap, thereby expanding the allowable range of manufacturing errors and improving the yield rate.

[0137] In addition, in the present embodiment, the structure in which the anti-collision rib 10 abuts against the edge of the mounting hole 2a locked by the locking claw 7 is described, but it is not limited to such a structure. For example, it may also be a structure in which the edge of a hole not shown in the figure is abutted formed at a position different from the mounting hole 2a.

[0138] <Metal terminal part>

[0139] Next, the main reference Figures 8 to 10 Next, the metal terminal portions 9X and 9Y around which the ends of the coil 5 are wound will be described.

[0140] Figure 8 (a) means Figure 1 9Y of the metal terminal portion VIII of the embodiment of the present invention, and is a schematic front view showing a state before the end portion of the coil 5 is wound. Figure 8 (b) is a schematic right side view thereof.

[0141] Fig. 9 (a) means Figure 1 9Y of the metal terminal portion VIII of the embodiment of the present invention, and is a schematic front view showing a state where the end portion of the coil 5 is wound. Fig. 9 (b) is a schematic right side view thereof.

[0142] Fig.10 (a) means Figure 1 9Y of the metal terminal portion VIII of the embodiment, and is a schematic front view showing a state where the metal terminal portion 9Y and the end portion of the coil 5 are welded. Fig.10 (b) is a schematic right side view thereof.

[0143] The metal terminal portions 9X and 9Y have the same structure, and therefore, of the metal terminal portions 9X and 9Y, the metal terminal portion 9Y is represented in the drawings and described.

[0144] The base portion 4 has metal terminal portions 9X and 9Y around which the ends of the coil 5 are wound.

[0145] The metal terminal parts 9X and 9Y are connected to at least a part of the mounting terminals (mounting terminals 6X and 6Y) among the plurality of mounting terminals 6W, 6X, 6Y and 6Z, and a part of the metal terminal parts 9X and 9Y can be melted by welding. The metal terminal parts 9X and 9Y of the present embodiment are formed of brass. In addition, the metal terminal parts 9X and 9Y are not limited to such a structure, and can be a structure that can be melted and solidified by welding, and a structure that can be properly joined to the end of the coil 5.

[0146] like Figure 8 As shown, at least one of a concave portion 9Yc for locking the end of the coil 5 and a convex portion (not shown) is formed in the metal terminal portions 9X and 9Y.

[0147] As described above, by locking the end of the coil 5 in the recessed portion 9Yc (or the raised portion), the winding position of the end of the coil 5 can be stabilized before welding the metal terminal portions 9X and 9Y to the end of the coil 5 .

[0148] In this embodiment, the winding portion 13 of the coil 5 includes: metal terminal portions 9X, 9Y; and a protrusion 4d, which is arranged adjacent to the metal terminal portions 9X, 9Y and protrudes in an L shape in a manner that bends upward from the side of the base portion 4 (base 4b) and protrudes toward the front side.

[0149] More specifically, the metal terminal portion 9X is bent inside the standing wall 4 c of the base portion 4 and is formed integrally with the mounting terminal 6X.

[0150] The metal terminal portion 9Y is bent inside the vertical wall 4c of the base portion 4 and is integrated with the mounting terminal 6Y, and a branched portion conducts the capacitor chip 12 and is integrated with the mounting terminal 6Z. According to such a structure, a series resonant circuit can be formed using the coil 5, the capacitor chip 12 and the printed circuit board 2.

[0151] Furthermore, by providing the mounting terminal 6Z connected to the metal terminal portion 9Y, the capacitor chip 12 can be mounted on the printed circuit board 2 .

[0152] The second winding portion 5c is wound around the metal terminal portion 9X and the protrusion 4d, and the third winding portion 5e is wound around the metal terminal portion 9Y and the protrusion 4d, thereby providing two winding portions 13. As described later, the two winding portions 13 are connected integrally by welding.

[0153] The tip side (tip part 9Yb) of the metal terminal parts 9X and 9Y is formed thinner than the base side (base end part 9Ya), and a recessed part 9Yc is formed on the tip side (tip part 9Yb).

[0154] According to the above structure, the end of the coil 5 can be wound by utilizing the step 9Yd between the thicker base end side (base end 9Ya) and the thinner top end side (top end 9Yb), so that the end of the coil 5 (the middle part 5eb of the third winding part 5e discussed later) can be prevented from sliding downward (in the installation direction) where the protrusion 4d is located.

[0155] Therefore, the middle portion 5eb of the third winding portion 5e can be reliably arranged at a predetermined amount. Fig.10 The inside of the solder ball 9Ye shown can ensure the bonding strength by soldering, and can suppress the generation of an unnecessary play (slack) in the lower portion 5ea of ​​the third winding portion 5e after soldering.

[0156] In addition, by winding the most distal end portion of the coil 5 (the upper portion 5ec of the third winding portion 5e described later) around the recessed portion 9Yc, the winding position of the most distal end portion of the coil 5 can be stabilized.

[0157] In addition, according to the above structure, it is possible to suppress the occurrence of deviation in the winding position of the end of the coil 5. Fig.10 As shown, when the upper parts of the metal terminals 9X and 9Y are melted by welding to form solder balls 9Ye, the ends of the coil 5 can be fully covered by the solder balls 9Ye, and the bonding strength can be improved. Thus, disconnection of the ends of the coil 5 can be suppressed.

[0158] More specifically, in the longitudinal direction of the coil component 1 , the length of the distal end side (distal end portion 9Yb) of the metal terminal portions 9X and 9Y is formed to be shorter than the length of the proximal end side (proximal end portion 9Ya).

[0159] The metal terminal portions 9X and 9Y are each formed to be plane-symmetrical with respect to an imaginary center plane that includes the center axis and extends in the longitudinal direction of the coil component 1 .

[0160] The protrusion 4d provided on the base 4b functions as a stopper for melting the metal terminal portions 9X and 9Y, and the warped portion of the upper portion of the protrusion 4d functions as a member for restricting the upward movement of the lower portion 5ea of ​​the third winding portion 5e. The protrusion 4d is provided adjacent to the metal terminal portions 9X and 9Y, respectively, and is formed integrally with the base 4b made of flame-retardant resin.

[0161] Therefore, even if heat energy generated by welding of the metal terminal portions 9X and 9Y is transferred to the protrusion 4d, the protrusion 4d does not melt.

[0162] Therefore, if Fig.10 As shown, the protrusion 4d prevents the base end 9Ya of the metal terminal portion 9Y and the lower portion 5ea of ​​the third winding portion 5e wound around the base end 9Ya, which are located below the upper surface of the protrusion 4d, from melting.

[0163] Thus, melting of the lower portion 5ea of ​​the third wound portion 5e can be prevented, and the wound portion of the lower portion 5ea remains connected to the base end portion 9Ya with a slight play in the radial direction with respect to the winding axis of the third wound portion 5e.

[0164] Therefore, when a tensile force is applied to the third winding portion 5 e , the third winding portion 5 e can be slightly displaced to suppress an increase in stress, thereby preventing the end portion of the coil 5 from being broken.

[0165] In addition, in the present embodiment, the lower portion 5ea of ​​the third winding portion 5e is wound around the base end portion 9Ya of the metal terminal portion 9Y and the protrusion 4d, the middle portion 5eb of the third winding portion 5e is wound around the top end portion 9Yb of the metal terminal portion 9Y, and the upper portion 5ec of the third winding portion 5e is wound around the recess 9Yc of the metal terminal portion 9Y, but the present invention is not limited to such a structure. That is, the number of turns of each part of the third winding portion 5e with respect to the protrusion 4d or the metal terminal portion 9Y can be set arbitrarily.

[0166] <How to install coil parts>

[0167] The coil component installation method of the embodiment of the present invention is described. In the coil component installation method of the present embodiment, a coil component 1 and a printed circuit board 2 are prepared, and the coil component installation method of the present embodiment has the following steps: a joining step of joining at least a portion of the metal terminal portion 9X, 9Y to the end of the coil 5; an installation step of allowing the locking piece (locking claw 7) to pass through the mounting hole 2a by elastically deforming the locking piece (locking claw 7); and a locking step of elastically restoring the locking piece (locking claw 7) after the installation step so as to be locked to the edge of the mounting hole 2a.

[0168] In the joining step, at least a portion of the metal terminal portions 9X and 9Y is melted by welding to join the end portions of the coil 5 locked to the metal terminal portions 9X and 9Y.

[0169] According to the above configuration, by locking the end of the coil 5 in the recess 9Yc (or the protrusion not shown), the winding position of the end of the coil 5 can be stabilized before welding the metal terminal portions 9X and 9Y to the end of the coil 5 .

[0170] The metal terminal portion 9Y of the metal terminal portions 9X and 9Y is used as a representative. Fig. 9 The details of the bonding process will be described.

[0171] First, the operator winds the end of the coil 5 around the protrusion 4d and the base end 9Ya of the metal terminal 9Y at least one turn above the base 4b in a manner that binds the protrusion 4d and the base end 9Ya of the metal terminal 9Y to form the lower portion 5ea of ​​the third winding portion 5e.

[0172] Next, the worker winds the end of the coil 5 only around the leading end portion 9Yb at least once so as to be hooked on the step 9Yd, thereby forming the middle portion 5eb of the third winding portion 5e.

[0173] Finally, the worker winds the end of the coil 5 only around the leading end portion 9Yb at least once so as to be hooked on the recessed portion 9Yc, thereby forming the upper portion 5ec of the third winding portion 5e.

[0174] Thus, the third winding portion 5e is formed by winding the coil 5. For the third winding portion 5e thus formed, the upper surface of the base 4b can restrict the downward movement of the lower portion 5ea of ​​the third winding portion 5e, and the lower surface of the portion of the protrusion 4d protruding toward the front side can restrict the upward movement of the lower portion 5ea.

[0175] In addition, the step 9Yd can restrict the downward movement of the middle portion 5eb of the third winding portion 5e, and the recessed portion 9Yc can restrict the upward and downward movement of the upper portion 5ec of the third winding portion 5e.

[0176] By winding the third wound portion 5 e around the metal terminal portion 9Y in this manner, the state of the wound portion 13 can be stabilized in the pre-welding stage.

[0177] As described above, since the vertical movement of the lower portion 5ea of ​​the third winding portion 5e remaining after welding is restricted by the upper surface of the base 4b and the lower surface of the portion of the protrusion 4d protruding toward the front side, displacement due to vibration can also be suppressed for portions other than the welding portion.

[0178] <For installation locations of electrical components>

[0179] Next, refer to Figures 11 to 16 The mounting location of the electric component (for example, the above-mentioned capacitor chip 12) will be described.

[0180] Fig.11 1 is a perspective view showing an enlarged view of the area around the pad 16a on which the capacitor chip 12 is mounted. Fig.12 It is a perspective view showing a state where the capacitor chip 12 is mounted on the pad 16a.

[0181] Fig.13 It is a perspective view showing the lead frames 16 (16X, 16Y, 16Z) and the capacitor chip 12 mounted on a part (pad 16a) of the lead frames 16Y and 16Z.

[0182] Fig.14 (a) is a schematic front view showing the area around the pad 16a before the capacitor chip 12 is mounted. Fig.14 (b) is a schematic front view showing the vicinity of the pad 16a after the capacitor chip 12 is mounted.

[0183] Fig.15 (a) is a schematic front view showing an example in which a through hole 400e is formed inside the edges of a pair of opposing pads 16a in the first direction. Fig.15 (b) is a schematic front view showing an example in which the through hole 400f is formed at a position inside the capacitor chip 12 in the second direction.

[0184] Fig.16 It is a schematic front view showing a through hole 4f formed across a pair of pads 16a on which the capacitor chip 12 is mounted and a pair of pads 16c on which the chip resistor 18 is mounted.

[0185] In addition, Fig.14 and Fig.15 And the subsequent discussion Fig.16 In FIG. 1 , a portion of the base portion 4 near the through holes 4e, 4f, 400e, and 400f is simplified and shown in a square shape.

[0186] In addition, Fig.14 (b) Fig.15 as well as Fig.16 In FIG. 1 , the capacitor chip 12 (and the chip resistor 18 ) are virtually represented by double-dotted lines and shading.

[0187] like Fig.12 and Fig.13 As shown, electrical components (such as capacitor chip 12 and chip resistor 18 discussed later) are connected by solder 17. Fig.13 The pads 16a (16c) shown as part of the lead frames 16Y, 16Z are electrically and physically connected.

[0188] Furthermore, when the electrical component is soldered to the pad 16a (16c) by reflow soldering, Fig.15 As shown, solder balls 17 a as foreign matter may be unexpectedly generated on the capacitor chip 12 .

[0189] In order to prevent the generation of such solder balls 17a, the following countermeasures are usually implemented: (1) adjustment of temperature conditions during reflow soldering; (2) adjustment of solder paste coating conditions (coating amount); (3) reconsideration of solder paste material or coating shape; (4) reconsideration of pad size, etc.

[0190] Furthermore, in the case where the coil component 1 is exposed to an environment generating vibration, such as when the coil component 1 is transported or mounted on a vehicle, an inspection and removal process for removing the solder ball 17a is particularly necessary, and improvements are sought. In particular, it is necessary to suppress the generation of the solder ball 17a not for the electrical components constituting the integrated circuit, but for the electrical components of the surface mounting type.

[0191] The coil component 1 of the present embodiment includes: an electrical component (capacitor chip 12) having a pair of terminals; and a pattern (lead frame 16 (lead frames 16X, 16Y, 16Z)) having conductivity. The pattern (lead frames 16Y, 16Z) has a pair of pads 16a to which a pair of terminals 12a of the capacitor chip 12 are joined by solder 17.

[0192] A portion of the lead frame 16 is provided inside the base portion 4 , and a pair of pads 16 a are exposed to the outside from the base portion 4 .

[0193] Furthermore, a hole (through hole 4 e ) is formed in the base portion 4 at a position between the pair of pads 16 a and overlapping with the capacitor chip 12 joined to the pads 16 a .

[0194] The “electrical components” include, in addition to the capacitor chip 12 , the chip resistor 18 and the like which will be discussed later.

[0195] The "hole" formed in the base 4 can be any hole that can expand the space around the capacitor chip 12. In other words, it can avoid the base 4 and the capacitor chip 12 from approaching each other, and is not limited to the through hole 4e, and may be a bottomed hole.

[0196] That is, a portion of the base portion 4 facing the capacitor chip 12 may be a recessed cavity with a thin wall relative to the surrounding area.

[0197] Furthermore, “a position overlapping with the capacitor chip 12 ” strictly speaking refers to a position overlapping with the capacitor chip 12 when viewed from a direction perpendicular to the pair of pads 16 a .

[0198] According to the above structure, by forming the hole, it is possible to prevent the molten solder 17 from remaining in the portion between the pair of pads 16a of the capacitor chip 12 during reflow soldering, and the solder 17 is easily aggregated to the pads 16a. Therefore, it is possible to prevent the generation of solder balls 17a in the portion of the capacitor chip 12 facing the hole (through hole 4e).

[0199] Furthermore, since the hole is the through hole 4e, the aggregation of the solder 17 to the pad 16a can be further promoted during the reflow process, and the generation of the solder ball 17a can be further suppressed.

[0200] The base portion 4 of this embodiment includes Fig.13 The lead frame 16 is insert molded in the manner shown.

[0201] The lead frame 16 of the present embodiment includes: a lead frame 16X having a metal terminal portion 9X at one end; a lead frame 16Y having a metal terminal portion 9Y and one pad 16a; and a lead frame 16Z having a pad 16a paired with one pad 16a.

[0202] Specifically, the lead frame 16 of the present embodiment is formed of phosphor bronze, and is formed by punching a 0.3 mm thick plate material with a press machine and applying tin plating to the entire surface.

[0203] The capacitor chip 12 is bonded between the pair of pads 16 a by solder 17 .

[0204] The ends of the pair of pads 16 a on both sides in the width direction and the end on the side away from the other pad 16 a are embedded in the base portion 4 , so that the pair of pads 16 a are firmly held in the base portion 4 .

[0205] In addition, the base portion 4 of the present embodiment has a through hole 4e extending long in the vertical direction and penetrating in the thickness direction, and a pair of pads 16a are arranged so as to extend from both sides of the through hole 4e toward the center. Incidentally, the through hole 4e of the present embodiment is formed during resin molding.

[0206] The edge 4g of the hole (through hole 4e) is formed to overlap with the edges 16b of the pair of pads 16a on the opposite sides thereof, or as shown in FIG. Fig.14 As shown, it is formed to a position outside the edge 16b on the opposite side.

[0207] Here, “formed to a position outside the edge 16b on the opposite side” means that the edge 16b on the opposite side relative to the pair of pads 16a is perpendicular to the direction ( Fig.14 In the first direction shown in FIG. 1 , the edge 16 b is formed to the outside on both sides (the upper side and the lower side in this embodiment) compared to the edge 16 b on the opposite side. In addition, the “outside” is the side when the space between the pair of pads 16 a is set to the inside, i.e., the outside.

[0208] That is, in this state, the edge of the space on the side facing the capacitor chip 12 in the above direction is defined by the edge 16b of the pad 16a. With such a structure, the solder 17 also gathers on the end surfaces of the pair of pads 16a facing each other.

[0209] As a comparative example Fig.15 The structure shown in (a) is a structure in which the edge 400g of the hole (through hole 400e) is formed at a position inside the edge 16b of each of the pair of pads 16a on the opposite sides. In this structure, the solder 17 may remain attached to the edge 400g of the through hole 400e during reflow soldering, and the remaining solder 17 may form a solder ball 17a.

[0210] On the other hand, according to Fig.14 In the above structure shown in (b), the edge 4g of the through hole 4e is not formed on the inner side separated from the condensed part of the pad 16a, so the solder 17 is unlikely to remain on the edge 4g during reflow. Therefore, it is possible to suppress the generation of solder balls 17a at the edge 4g of the through hole 4e that intersects the above direction (the first direction discussed later).

[0211] In the plane of the pair of pads 16a on which the electric element (capacitor chip 12) is mounted, the direction connecting the pair of pads 16a is set as the first direction, and the direction perpendicular to the first direction is set as the second direction. Fig.14 The hole (through hole 4 e ) shown in (b) is formed to be wider in the second direction and to extend to the outside of the capacitor chip 12 when viewed from the direction perpendicular to the above-mentioned plane.

[0212] That is, this state is a state in which the edge of the space located on the side facing the capacitor chip 12 in the second direction is defined by the edge 16 b of the pad 16 a .

[0213] As a comparative example Fig.15 The structure shown in (b) is a structure in which a hole (through hole 400f) is formed at the same position as the capacitor chip 12 in the second direction, or is formed at a position inside the capacitor chip 12. In this structure, the solder 17 sometimes remains attached to the edge 400h of the through hole 400f during reflow, and the remaining solder 17 sometimes forms a solder ball 17a.

[0214] On the other hand, according to Fig.14 In the structure shown in (b), the edge 4h is formed wider to the outside of the capacitor chip 12, so that the solder 17 is less likely to remain. Therefore, it is possible to suppress the generation of solder balls 17a between the capacitor chip 12 and the edge 4h of the through hole 4e intersecting the second direction.

[0215] exist Fig.16 In the structure shown, a plurality of electrical components (capacitor chip 12 and chip resistor 18) are provided. The pads 16a, 16c provided to the pattern (lead frame 16) are provided in pairs corresponding to the terminals 12a, 18a of the electrical components (capacitor chip 12 and chip resistor 18).

[0216] Furthermore, the hole (through hole 4f) extends across the plurality of pairs of pads 16a and 18a.

[0217] The electrical components in the present embodiment are only the capacitor chip 12 and the chip resistor 18 , but a plurality of electrical components may be provided.

[0218] According to the above configuration, the hole (through hole 4f) spanning between the plurality of pairs of lands 16a and 18a can suppress the generation of solder balls 17a at the portion of the base portion 4 facing the plurality of electrical components.

[0219] The above-described embodiments and modifications include the following technical ideas.

[0220] (1) A coil component mounted on a printed circuit board having a mounting hole formed in a thickness direction, characterized in that:

[0221] The coil components have:

[0222] core;

[0223] a coil wound around the core;

[0224] a base portion for holding the core; and

[0225] a plurality of mounting terminals, at least a portion of which are electrically connected to the coil and the printed circuit board, and the plurality of mounting terminals are held by the base portion,

[0226] The base portion has a locking piece that can be elastically deformed.

[0227] The locking piece can pass through the mounting hole by elastic deformation, and can be locked to the edge of the mounting hole by elastic restoration.

[0228] (2) The coil component according to (1), wherein:

[0229] The locking piece extends in the same direction as an extending direction of the mounting terminal, and the extending direction is a mounting direction of the locking piece on the printed circuit board.

[0230] (3) The coil component according to (1) or (2), wherein:

[0231] The base portion has an elastically deformable holding piece for holding the core.

[0232] The holding piece holds the core in an elastically deformed state.

[0233] (4) The coil component according to any one of (1) to (3), wherein:

[0234] The base portion is formed in a longitudinal direction,

[0235] The pair of locking pieces are provided at both ends of the base portion in the longitudinal direction.

[0236] (5) The coil component according to any one of (1) to (4), wherein:

[0237] The base portion is formed in a longitudinal direction,

[0238] The locking piece protrudes outward in the longitudinal direction of the base portion from a position above the center portion at the end portion of the base portion and extends in a curved manner toward a placement direction on the printed circuit board.

[0239] (6) The coil component according to any one of (1) to (5), wherein:

[0240] The end of the locking piece has:

[0241] a first inclined surface that is inclined toward the elastic restoration side as it approaches the tip side;

[0242] and a second inclined surface provided at a position closer to the distal end side than the first inclined surface and inclined so as to be elastically deformed as it goes toward the distal end side.

[0243] (7) The coil component according to any one of (1) to (6), wherein:

[0244] The core is formed lengthwise and has a flat cross-sectional shape including long sides and short sides in a cross section perpendicular to the lengthwise direction.

[0245] The core is supported by the base portion in a state where the core stands upright with the long side facing a placement direction on the printed circuit board.

[0246] (8) The coil component according to any one of (1) to (7), wherein:

[0247] The base portion has a metal terminal portion around which an end of the coil is wound.

[0248] The metal terminal portion is connected to at least a portion of the plurality of mounting terminals, and a portion of the metal terminal portion can be melted by welding.

[0249] The metal terminal portion is formed with at least one of a recessed portion and a protruding portion to which an end portion of the coil is locked.

[0250] (9) The coil component according to (8), wherein:

[0251] The tip end side of the metal terminal portion is formed to be thinner than the base end side.

[0252] The recessed portion is formed on the distal end side.

[0253] (10) The coil component according to any one of (1) to (9),

[0254] The coil component also has:

[0255] an electrical component having a pair of terminals;

[0256] and a pattern, which has electrical conductivity,

[0257] The pattern has a pair of pads to which the pair of terminals of the electrical element are joined by soldering.

[0258] A portion of the pattern is disposed inside the base portion,

[0259] The pair of pads are exposed to the outside from the base portion,

[0260] The base portion has a hole formed at a position between the pair of pads and overlapping with the electric component joined to the pads.

[0261] (11) The coil component according to (10), wherein:

[0262] The edge of the hole is formed so as to overlap with the edges of the pair of pads on the sides facing each other, or is formed to be positioned outside the edges on the sides facing each other.

[0263] (12) The coil component according to (10) or (11), wherein:

[0264] In the plane of the pair of pads on which the electrical element is mounted, when a direction connecting the pair of pads is set as a first direction and a direction perpendicular to the first direction is set as a second direction,

[0265] The hole is formed wider than the electric component and extends to a position outside the electric component in the second direction when viewed from a direction perpendicular to the plane.

[0266] (13) The coil component according to any one of (10) to (12), wherein:

[0267] The electrical components are provided in plurality.

[0268] The pads provided to the pattern are provided in pairs corresponding to the terminals of the electrical element.

[0269] The hole extends across a plurality of pairs of the pads.

[0270] (14) An electrical device having a coil component, wherein:

[0271] The electrical equipment with coil components has:

[0272] The coil component according to any one of (1) to (13);

[0273] and the printed substrate.

[0274] (15) The electric device with a coil component according to (14), wherein:

[0275] The base portion includes an anti-collision rib which is broken by contact with the edge of the hole of the printed circuit board and can be locked to the edge of the hole of the printed circuit board.

[0276] The anti-collision rib is locked to the edge of the hole of the printed circuit board in a direction different from a locking direction of the locking piece.

[0277] (16) An electrical device having a coil component, wherein:

[0278] The electrical equipment with coil components has:

[0279] (6) The coil parts described above;

[0280] and the printed circuit board,

[0281] The coil component has a contact portion that contacts the printed circuit board when mounted on the printed circuit board.

[0282] When the contact portion is in contact with the printed circuit board, the end of the locking piece contacts the edge of the mounting hole of the printed circuit board at the first inclined surface.

[0283] (17) A method for installing a coil component, wherein:

[0284] In the coil component mounting method, the coil component described in (8) or (9) and the printed circuit board are prepared, and the coil component mounting method comprises the following steps:

[0285] a joining step of joining at least a portion of the metal terminal portion to an end portion of the coil;

[0286] An installation step of allowing the locking piece to pass through the installation hole by elastically deforming the locking piece; and

[0287] a locking step of causing the locking piece to elastically recover after the mounting step so as to be locked to the edge of the mounting hole,

[0288] In the joining step, at least a portion of the metal terminal portion is melted by welding to join the end portion of the coil locked to the metal terminal portion.

[0289] (18) The coil component according to (4), wherein:

[0290] The pair of locking pieces are configured to be elastically deformed and elastically restored in opposite directions to each other so as to be lockable to the edge of the mounting hole.

[0291] (19) The coil component according to (6), wherein:

[0292] The locking piece is provided with an extension portion extending in a mounting direction of the locking piece toward the printed circuit board at a position closer to the base end side than the first inclined surface.

[0293] The second inclined surface extends toward the elastically deformable side relative to the extending portion.

[0294] (20) A coil component, characterized in that:

[0295] The coil component comprises: a core; a coil wound around the core; a base portion for holding the core; and a plurality of mounting terminals for mounting on a printed circuit board.

[0296] The base portion has a metal terminal portion around which the end of the coil is wound.

[0297] The metal terminal portion is connected to at least a portion of the plurality of mounting terminals, and a portion of the metal terminal portion can be melted by welding.

[0298] The metal terminal portion is formed with at least one of a recessed portion and a convex portion in which an end portion of the coil is locked.

[0299] (21) A coil component mounted on a printed circuit board, characterized in that:

[0300] The coil components have:

[0301] core;

[0302] a coil wound around the core;

[0303] a base portion for holding the core;

[0304] an electrical component having a pair of terminals; and

[0305] pattern, which has electrical conductivity,

[0306] The pattern has a pair of pads to which the pair of terminals of the electrical element are joined by soldering.

[0307] A portion of the pattern is disposed inside the base portion,

[0308] The pair of pads are exposed to the outside from the base portion,

[0309] The base portion has a hole formed at a position between the pair of pads and overlapping with the electric component joined to the pads.

[0310] This application claims the priority based on Japanese application (Japanese Patent Application No. 2019-122994) filed on July 1, 2019, and all the contents disclosed in this Japanese application are incorporated herein by reference.

[0311] Description of Reference Numerals

[0312] 1X, antenna device (electrical equipment with coil components); 1, coil components; 2, printed circuit board; 2a, mounting hole; 2b, through hole; 3, core; 3a, long side; 3b, short side; 4, base; 4a, coil frame; 4b, base; 4ba, bottom plate; 4bb, supporting rib; 4bc, side wall; 4bd, rod; 4c, vertical wall; 4ca, bridge portion; 4d, protrusion; 4e, 4f, through hole ( hole); 4g, 4h, edge; 5, coil; 5a, 1st winding portion; 5b, 1st path portion; 5c, 2nd winding portion; 5d, 2nd path portion; 5e, 3rd winding portion; 5ea, lower portion; 5eb, middle portion; 5ec, upper portion; 6W, 6X, 6Y, 6Z, mounting terminal; 7, locking claw (locking piece); 7a, protrusion; 7b, extension portion; 7c, top portion; 7d, 1st inclined surface; 7e, 2nd Inclined surface; 7f, topmost part; 8X, 8Y, holding claw (holding piece); 8Xa, base end; 8Xb, extension; 8Xc, top end; 9X, 9Y, metal terminal; 9Ya, base end; 9Yb, top end; 9Yc, recess; 9Yd, step; 9Ye, solder ball; 10, anti-collision rib; 11, abutment rib (abutment part); 12, capacitor chip (electrical component); 12a, terminal; 13, winding Winding; 14, insulating tape; 15, mounting claw; 15a, inner wall; 15b, reinforcing wall; 15c, 15d, supporting wall; 16, 16X, 16Y, 16Z, lead frame (pattern); 16a, 16c, pad; 16b, edge; 17, solder; 17a, solder ball; 18, chip resistor (electrical component); 18a, terminal; 400e, 400f, through hole; 400g, 400h, edge.

Claims

1. A coil component, which is a coil component mounted on a printed circuit board, characterized in that: The coil components have: core; a coil wound around the core; a base portion that receives the core internally; an electrical component having a pair of terminals; and The lead frame is electrically conductive. The lead frame has a pair of pads to which the pair of terminals of the electrical element are joined by soldering. A portion of the lead frame is buried inside the base portion. The pair of pads are exposed to the outside from the base portion, The base portion has a hole formed at a position between the pair of pads and overlapping with the electric component joined to the pads.

2. The coil component according to claim 1, wherein: The edge of the hole is formed so as to overlap with the edges of the pair of pads on the sides facing each other, or is formed to be positioned outside the edges on the sides facing each other.

3. The coil component according to claim 1 or 2, wherein: In the plane of the pair of pads on which the electrical element is mounted, when a direction connecting the pair of pads is set as a first direction and a direction perpendicular to the first direction is set as a second direction, The hole is formed wider than the electric component and extends to a position outside the electric component in the second direction when viewed from a direction perpendicular to the plane.

4. The coil component according to any one of claims 1 to 3, wherein The electrical components are provided in plurality. A plurality of pairs of pads provided to the lead frame are provided corresponding to the terminals of the electrical component, The hole extends across a plurality of pairs of the pads.

5. An electrical device with a coil component, wherein: The electrical equipment with coil components has: The coil component according to any one of claims 1 to 4; and The printed substrate.

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