JP2023073460A - Coil component and electric appliance with coil component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil component that enables suitable installation of the coil component and a printed board in an operation appliance such as a vehicle, an electric appliance with the coil component, and a coil component attachment method.

SOLUTION: A coil component 1 is attached with a part thereof inserted into a printed board 2 having an attachment hole formed in a thickness direction. The coil component 1 includes a core, a coil 5 wound around the core, a base part 4 that holds the core, and a plurality of mount terminals 6W, 6X, 6Y, and 6Z that is conductive with the coil 5 and the printed board 2 at least partially and that is held in the base part 4. The base part 4 includes an elastically deformable engagement piece (engagement claw 7). The engagement claw 7 can pass through the attachment hole by elastic deformation, and can be engaged with an edge of the attachment hole by elastic restoration.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2023,JPO&INPIT

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention 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 coil component mounting method.

2. Description of the Related Art A keyless entry system has been put into practical use, which can lock or unlock a door of an automobile or a house by transmitting and receiving signal radio waves without directly touching the door. In order to realize a keyless entry system, many coil antennas such as LF (Low Frequency) transmission antennas capable of transmitting and receiving signal radio waves are employed. Coil antennas are also often used in so-called radio-controlled watches that attempt to accurately adjust time using radio waves.
A coil component composed of a magnetic core and a winding coil is preferably used for a coil antenna.

For example, Patent Document 1 discloses a coil component (described as an antenna device in the document) used in a keyless entry system. The coil component is attached to the vehicle by fitting a locking body to the lower surface of the case, which is a component of the coil component.
Further, 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 attached via the connector portion. The connector part constitutes a part of a cylindrical closure body, and a connection terminal connected to the antenna body is formed so as to protrude inside.

JP 2011-205616 A

By the way, the keyless entry system is also used in vehicles such as motorcycles that are subjected to large vibrations. However, when an LF transmission antenna is installed on a printed circuit board, it becomes difficult to ensure vibration resistance due to the weight of the antenna when large vibrations are repeatedly applied in such an environment.
In this respect, in the coil component disclosed in Patent Literature 1, in order to ensure the vibration resistance of the coil component, it was necessary to separate the coil component and the control device as described above and attach them to the vehicle.
For this reason, it is necessary to secure an installation location for the coil components separately from the control device, which increases the number of installation locations and takes time and effort to install, and the need to secure an installation range affects vehicle design. was there.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a coil component, an electric device with the coil component, and a coil component mounting method that enable the coil component and the printed circuit board to be suitably installed in an operating device such as a vehicle. It is.

According to the present invention, a coil component to be attached to a printed circuit board having an attachment hole formed in the thickness direction comprises a core, a coil wound around the core, and a base portion that holds the core. and a plurality of mounting terminals at least partially electrically conductive to the coil and the printed circuit board and held by the base portion, the base portion having an elastically deformable locking piece, the A coil component is provided as the locking piece that can pass through the mounting hole by being elastically deformed.

Further, according to the present invention, there is provided an electric device with a coil component, which includes the coil component and the printed circuit board.

Further, according to the present invention, the joining step of preparing the coil component and the printed circuit board, joining at least a part of the metal terminal portion to an end portion of the coil, and elastically deforming the locking piece. and a locking step of elastically restoring the locking piece so as to lock it to the edge of the mounting hole after the mounting step. A coil component mounting method is provided in which at least a portion of the metal terminal portion is melted by welding to join the end portion of the coil to be engaged with the metal terminal portion.

ADVANTAGE OF THE INVENTION According to this invention, the coil component, the electric equipment with a coil component, and the coil component attachment method which can suitably install a coil component and a printed circuit board in operation apparatus, such as a vehicle, are provided.

1 is a front view of an antenna device; FIG. It is a perspective view showing the bottom side of the antenna device. It is a perspective view which shows the front side of an antenna device. It is a perspective view which shows the back side of an antenna device. FIG. 5 is an enlarged view of the V portion of FIG. 4 showing a retaining pawl; FIG. 4 is a schematic front view showing a state in which locking claws and crush ribs are locked in mounting holes of a printed circuit board; FIG. 4 is a schematic bottom view showing a state in which locking claws and crush ribs are locked in mounting holes of a printed circuit board; (a) is a diagram showing the metal terminal portion of section VIII in FIG. 1, and is a schematic front view showing a state before the ends of the coil are entwined, and (b) is a diagram of section VIII in FIG. It is a figure which shows a metal terminal part, and is a typical right side view which shows the state before the edge part of a coil is bound. (a) is a diagram showing the metal terminal portion of the VIII part of FIG. 1, and is a schematic front view showing the state after the end of the coil is entwined, and (b) is a schematic front view of the VIII part of FIG. 1 is a diagram showing the metal terminal portion of FIG. 1, and is a schematic right side view showing a state after the ends of the coil are bound. (a) is a diagram showing the metal terminal part of section VIII of FIG. 1, and is a schematic front view showing the state after the metal terminal part and the end of the coil are welded; 1 is a view showing the metal terminal portion of section VIII of FIG. 1, and is a schematic right side view showing a state after the metal terminal portion and the end portion of the coil are welded. FIG. 3 is an enlarged perspective view showing the periphery of a land on which a capacitor chip is mounted; FIG. 4 is a perspective view showing a state in which a capacitor chip is mounted on lands; 4 is a perspective view showing a lead frame and a capacitor chip attached to a portion of the lead frame; FIG. (a) is a schematic front view showing the surroundings of a land before mounting a capacitor chip, and (b) is a schematic front view showing the surroundings of a land after mounting a capacitor chip. (a) is a schematic front view showing an example in which through-holes are formed inside the edges of a pair of opposing lands in the first direction; (b) is a schematic front view showing an example in which through holes are formed inside the capacitor chip in the second direction; FIG. 4 is a schematic front view showing an example in which a through hole is formed in the . FIG. 3 is a schematic front view showing a pair of lands on which a capacitor chip is mounted and a through hole formed across the pair of lands on which a chip resistor is mounted;

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.
The embodiments described below are merely examples for facilitating understanding of the present invention, and do not limit the present invention. That is, the shape, size, arrangement, etc. of the members described below can be changed and improved without departing from the scope of the present invention, and the present invention naturally includes equivalents thereof.
In addition, the various constituent elements of the present invention do not need to exist independently of each other. It allows that a component is part of another component, part of one component overlaps part of another component, and the like.

Moreover, in all the drawings, the same constituent elements are denoted by the same reference numerals, and overlapping descriptions are omitted as appropriate. In addition, in this specification, the vertical direction may be defined and described, but this is set for convenience in order to describe the relative relationship of the constituent elements, and the product according to the present invention may be manufactured or used. It does not limit the direction of time. In particular, in the present embodiment, the mounting direction is downward and the opposite direction is upward, and the vertical direction in the direction of gravity does not necessarily match.

<Outline of coil parts>
First, the outline of the coil component 1 will be described mainly with reference to FIGS. 1 to 4. FIG.
FIG. 1 is a front view of an antenna device 1X (coil component 1) according to this embodiment, and FIG. 2 is a perspective view showing the bottom surface of the antenna device 1X. 3 is a perspective view showing the front side of the antenna device 1X, and FIG. 4 is a perspective view showing the rear side of the antenna device 1X.

The coil component 1 is mounted by being partially inserted into a printed circuit board 2 having a mounting hole 2a formed in the thickness direction (mounting direction of the coil component 1).
The coil component 1 includes a core 3, a coil 5 wound around the core 3, a base portion 4 that holds the core 3, the coil 5, and at least a portion of the printed circuit board 2 (mounting terminals 6X, 6Y, 6Z). ) are electrically conductive, and includes a plurality of mounting terminals 6W, 6X, 6Y, and 6Z, which are held by the base portion 4 and will be described later.
The base portion 4 has an elastically deformable locking piece (locking claw 7). The locking piece (locking claw 7) is characterized by being able to pass through the mounting hole 2a by being elastically deformed, and by being able to be locked to the edge of the mounting hole 2a by being elastically restored.
An electric device with a coil component (antenna device 1</b>X) includes a coil component 1 and a printed circuit board 2 .

As described above, the locking piece (locking claw 7) is locked to the edge of the mounting hole 2a of the printed circuit board 2, thereby alleviating (reducing) the influence of vibration between the coil component 1 and the printed circuit board 2. can do.
Specifically, when vibration is applied to the antenna device 1X, it is possible to prevent rattling between the coil component 1 and the printed circuit board 2, thereby suppressing the impact force applied between them. Moreover, it is possible to suppress an increase in the vibration amplitude of the coil component 1 compared to the vibration amplitude of the printed circuit board 2 .

Therefore, the coil component 1 attached to the printed board 2 can also be indirectly attached to the vehicle or the like only by attaching the printed board 2 to a part of the vehicle or the like. Therefore, it is possible to reduce the installation locations of these parts on the vehicle or the like, and to reduce the installation range.
In this document, the term “vehicles, etc.” refers to, for example, automobiles, motorcycles, ships, jet skis, aircraft, and unmanned aerial vehicles such as drones, and refers to operating equipment including mechanisms that can operate using radio waves.

In addition, in the above description, one component may be formed by being divided into a plurality of components. For example, although the base portion 4 holds the core 3 and the mounting terminals 6W, 6X, 6Y, and 6Z, a plurality of members may hold each of them. That is, the base portion 4 may be composed of a plurality of members instead of a single member.
Also, although at least some of the mounting terminals 6W, 6X, 6Y, and 6Z have been described as being conductive to the coil 5 and the printed circuit board 2, they are configured to be conductive via other conductive members. Including those that are

Further, "the locking piece (locking claw 7) can pass through the mounting hole 2a by elastically deforming, and can be locked to the edge of the mounting hole 2a by elastically restoring". In other words, it means that the locking claw 7 cannot be locked to the edge of the mounting hole 2a in its natural state.
The "locking piece" is not limited to the claw-shaped locking claw 7 elastically deformed and elastically restored in the linear direction, which will be described later. It may be a block-shaped locking member or the like.

In this embodiment, the mounting terminals 6W, 6X, 6Y, and 6Z are passed through a plurality of insertion holes 2b (see FIG. 2) provided in the printed circuit board 2 and welded to the printed circuit board 2 by soldering. . As described above, the locking claw 7 is locked to the edge of the mounting hole 2a in an elastically deformed state. Therefore, among the loads generated by vibrations applied to the antenna device 1X, the vibrations and shocks applied to the soldered portions of the mounting terminals 6W, 6X, 6Y, and 6Z should be reduced by the load received by the locking claws 7. can be done. Therefore, the bonding between the mounting terminals 6W, 6X, 6Y, and 6Z and the printed circuit board 2 can be easily maintained.

Note that the mounting terminals 6X, 6Y, and 6Z according to the present embodiment are conductive to the conductor wiring of the printed board 2, and the mounting terminal 6W is not conductive to the conductive wiring of the printed board 2 and is connected to the printed board 2. It is provided in order to make the mounting of the coil component 1 to the mounting more robust.
For example, if the mounting stability of the coil component 1 is sufficiently ensured by the pair of locking claws 7, the mounting terminal 6W is not an essential component, and the capacitor chip 12, which will be described later, is not provided. If there is, the mounting terminal 6Z is not an essential component. On the other hand, if the stability is insufficient, a plurality of mounting terminals may be provided.

<Core>
The core 3 amplifies the magnetic field generated by the coil 5, and as shown in FIG. The core 3 is formed long and has a flat cross-sectional shape (rectangular shape) including a long side 3a and a short side 3b in a cross section perpendicular to the long direction.
Although the cross-sectional shape of the core 3 according to this embodiment is rectangular, it may have rounded corners or chamfered corners.

The material of the core 3 includes ceramics containing iron oxide as a main component (ferrite core), amorphous alloy (aluminum core), compression molded metal powder (dust core), and multiple electromagnetic cores. Examples include a laminated structure (laminated core) formed by electrically insulating steel sheets.

Although the details will be described later, the lower surface of the core 3 is supported by support ribs 4bb provided on the base 4b, and the core 3 is attached from the back side to the base portion 4 so as to stand along the standing walls 4c described later. . Further, the core 3 is held in its posture by receiving elastic restoring force from the front and downward holding claws 8X and 8Y on the upper surface and the rear surface.

<Coil>
The coil 5 is a main part of the inductance element in the series resonance circuit of the coil component 1, and includes a first winding portion 5a, a first path portion 5b, a second winding portion 5c, a second path portion 5d and a second winding portion 5d. It includes three turns 5e.
The first wound 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 wound portion 5a.

The first path portion 5b forms a routing path from one end side of the first winding portion 5a to a metal terminal portion 9X described later.
The second winding portion 5c is a portion that is wound around the metal terminal portion 9X at the end that is routed from the first path portion 5b.
The second path portion 5d forms a routing path from the other end side of the first winding portion 5a to a metal terminal portion 9Y described later.
The third winding portion 5e is a portion that is wound around the metal terminal portion 9Y at the end that is routed from the second path portion 5d.

<Base part>
The base portion 4 is formed of an insulating material such as resin, and includes a bobbin 4a in the center portion in the longitudinal direction, on which the first winding portion 5a of the coil 5 is wound, and other portions. and bases 4b formed on both sides of the . The base portion 4 insulates the core 3 housed therein from the coil 5 wound around the bobbin 4a.

The bobbin 4a has a C-shaped cross section so that the central portion of the core 3 can be arranged inside, extends in the longitudinal direction, and constitutes a part of the vertical wall 4c on the front side. ing.
The base 4b includes a bottom plate 4ba, another part of the vertical wall 4c that stands upward from the end of the front side of the bottom plate 4ba, and the ends of the bottom plate 4ba located on both sides in the longitudinal direction of the base portion 4. and an upright side wall 4bc.
The bottom plate 4ba is formed with a plurality of supporting ribs 4bb that protrude upward and extend in the short direction (depth direction) of the base portion 4 with a length longer than that of the core 3. ing. The support ribs 4bb support the core 3 from below.

When the coil component 1 (base portion 4) vibrates, the core 3 also vibrates. In order to suppress the amplification of the vibration of the core 3 with respect to the vibration of the base portion 4, the base portion 4 (base 4b), as shown in FIGS. It has pieces (holding claws 8X, 8Y). FIG. 5 is an enlarged view of the V portion of FIG. 4 showing the holding claw 8X. The holding pieces (holding claws 8X and 8Y) hold the core 3 in an elastically deformed state.

According to the above configuration, the holding pieces (holding claws 8X and 8Y) in an elastically deformed state can always apply a biasing force to the core 3, thereby further stabilizing the fixed state of the core 3 to the base portion 4. be able to. The core 3 according to this embodiment is completely adhered and fixed to the base portion 4 with an epoxy adhesive.
Further, "the holding pieces (holding claws 8X, 8Y) hold the core 3 in an elastically deformed state" means that the holding pieces (holding claws 8X, 8Y) elastically deform It means that the core 3 can be passed from the outside to the accommodation position and can be held at the accommodation position by elastic restoration.

Specifically, as shown in FIG. 5, the holding claw 8X is formed to protrude rearward from a bridge portion 4ca provided at the upper end portion of the standing wall 4c.
More specifically, the holding claw 8X includes a base end portion 8Xa, an extension portion 8Xb extending obliquely backward and downward from the base end portion 8Xa, and a tip portion provided at the end of the extension portion 8Xb. 8Xc and
The distal end portion 8Xc is formed in an inverted triangular prism shape with a sloped surface that slopes upward toward the rear side.

When the operator attaches the core 3 from the back side to the front side of the bobbin 4a so as to follow the standing wall 4c, the operator contacts the upward inclined surface of the tip portion 8Xc and further presses the holding claws naturally. 8X will elastically deform upward.
When the core 3 is arranged along the standing wall 4c, the holding claws 8X are elastically restored while retaining the elastic restoring force, and the extension portions 8Xb press the back surface of the core 3, thereby The arrangement state is maintained.

The holding claws 8Y are provided on the opposite side of the holding claws 8X across the bobbin 4a, and as shown in FIG. It is formed so as to protrude rearward from the inner end of the lever 4bd that protrudes inward.
More specifically, the configuration of the holding claw 8Y is the same as the configuration of the holding claw 8X, so the description thereof will be omitted.

The core 3 is supported by the base portion 4 in a state in which the core 3 is erected so that the long side 3 a faces the mounting direction on the printed circuit board 2 .
Since the core 3 is supported by the base portion 4 in an upright state in this way, the area of the printed circuit board 2 in the plane direction is not narrowed, and the mounting space on the printed circuit board can be suitably secured. .
Note that the core 3 is not limited to standing completely perpendicular to the printed circuit board 2, and may stand obliquely with an inclination width of 20 degrees, for example.

<Locking Claw>
6 and 7 in addition to FIG. . 6 is a schematic front view showing a state in which the locking claw 7 and the crush rib 10 are locked in the mounting hole 2a of the printed circuit board 2, and FIG. 7 is a schematic bottom view showing this state. be. The dashed line portion of the crush rib 10 in FIG. 7 indicates the shape before press-fitting (before breaking).

The base portion 4 is elongated as described above, and the pair of locking pieces (locking claws 7) are provided at both ends (side walls 4bc) of the base portion 4 in the longitudinal direction.
Since the locking pieces (locking claws 7) are provided at both ends in the longitudinal direction of the base portion 4 in this manner, the stress applied during locking can be applied to a wide range of the base portion 4. This is preferable because the state of engagement of the base portion 4 with the printed circuit board 2 can be stabilized.

In particular, the pair of locking pieces (locking claws 7) are configured to be elastically deformed and elastically restored in directions opposite to each other so as to be locked to the edges of the mounting holes 2a different from each other.
With this configuration, the operator can grasp the pair of locking claws 7 and press and narrow them inward in the longitudinal direction of the base portion 4 to insert them into the mounting holes 2a.

In other words, the pair of locking claws 7 are arranged at positions where they can be accommodated and inserted into the mounting holes 2a when elastically deformed.
Also, the pair of locking claws 7 are arranged at positions that intersect the edges of the mounting hole 2a when elastically restored (including the restoration process state as well as the natural state).

Further, the pair of locking claws 7 are configured to elastically deform inward in the longitudinal direction of the base portion 4 and elastically restore outward in the longitudinal direction, but the reverse configuration is also possible. That is, the pair of locking claws 7 may be configured to elastically deform outward in the longitudinal direction of the base portion 4 and elastically restore inward in the longitudinal direction.

Further, when the locking claw 7 is provided on at least one side of the base portion 4 in the longitudinal direction, an elastic restoring force can always be applied to the portion where vibration is increased due to the length, so that vibration is prevented. However, the present invention is not limited to such a configuration. For example, it may be provided on at least one side of the base portion 4 in the short direction.
Furthermore, the locking pieces of the present invention are not limited to a pair, and only one locking piece may be elastically deformable, and the other may be plastically deformable or may not be deformed.

The locking pieces (locking claws 7) extend in the same direction as the extending direction (downward in this embodiment) of the mounting terminals 6W, 6X, 6Y, and 6Z, which is the mounting direction on the printed circuit board 2. .
The locking pieces (locking claws 7) extend in the same direction as the mounting terminals 6W, 6X, 6Y, and 6Z. The pieces (locking claws 7) can be smoothly locked in the mounting holes 2a.
Specifically, the locking pieces (locking claws 7) are bent so that the distal end side (extending portion 7b and distal end portion 7c) extends in the same direction as the mounting terminals 6W, 6X, 6Y, and 6Z. out.

More specifically, the locking piece (locking claw 7) protrudes outward in the longitudinal direction of the base portion 4 from above the central portion of the end portion (side wall 4bc) of the base portion 4 (protruding portion 7a). , and extends (extending portion 7b) so as to face the mounting direction (downward in this embodiment) on the printed circuit board 2. As shown in FIG. That is, the locking piece (locking claw 7) has an extension portion 7b that extends in the mounting direction on the printed circuit board 2. As shown in FIG.
The extension portion 7b is provided closer to the base end than the first inclined surface 7d, which will be described later.

The locking pieces (locking claws 7) protrude from above the central portion of the end portion of the base portion 4, and bend and extend in the direction in which the printed circuit board 2 is placed. It is possible to increase the restoring force according to the amount of deflection compared to the one extending from the lower side. Therefore, the locking state between the locking claw 7 and the printed circuit board 2 can be stabilized.
In addition, the locking claw 7 may extend linearly without having a bent portion connected to the projecting portion 7a and the extending portion 7b projecting outward in the longitudinal direction of the base portion 4 .

The end portion (tip portion 7c) of the locking piece (locking claw 7) has a first inclined surface 7d that is inclined toward the elastically restored side toward the distal end side, and a tip portion that is closer to the distal end than the first inclined surface 7d. and a second inclined surface 7e that is provided on the tip side and inclined toward the elastically deformable side toward the distal end side.
Specifically, the second inclined surface 7e extends to the side where the locking claw 7 elastically deforms (inward in the longitudinal direction of the base portion 4) from (the inner surface of) the extending portion 7b. .

In this manner, if the edge of the mounting hole 2a of the printed circuit board 2 is abutted on the first inclined surface 7d, the printed circuit board 2 is moved by the reaction force against the elastic restoring force of the locking claw 7 applied from the edge of the mounting hole 2a. The ends of the locking claws 7 are pushed in the mounting direction to stabilize the locking state. Further, since the first inclined surface 7d is formed as described above, when the first inclined surface 7d abuts against the edge surface of the mounting hole 2a and the locking claw 7 is in an elastically deformed state, the proximal end The amount of deflection of the tip portion 7c can be increased compared to the amount of deflection of a member (not shown) having a uniform outer surface shape from the tip to the tip. Therefore, the elastic restoring force of the locking claw 7 can be increased.

In addition, since the second inclined surface 7e is provided, when the coil component 1 is attached to the printed circuit board 2, the locking claw 7 can be elastically deformed and easily inserted into the attachment hole 2a.
Specifically, even if the outer edge of the mounting hole 2a is closer to the center than the inner surface of the extension portion 7b (the center side of the coil component 1), the second inclined surface 7e is located outside the mounting hole 2a. It suffices if the positional relationship is such that it abuts on the edge of the If the second inclined surface 7e and the mounting hole 2a are in such a positional relationship, the inward component in the longitudinal direction of the base portion 4 in the normal direction of the second inclined surface 7e from the outer edge of the mounting hole 2a. is applied to the locking pawl 7 .
Therefore, by simply pushing the coil component 1 in the mounting direction, the locking claw 7 can be elastically deformed inward (toward the center of the coil component 1) without applying a load to the locking claw 7 inward. , the locking claw 7 can be inserted into the mounting hole 2a from the distal end 7f (see FIG. 4).

The coil component 1 (the base 4b of the base portion 4) has a contact portion (contact rib 11) that contacts the printed circuit board 2 when attached to the printed circuit board 2. As shown in FIG.
Specifically, the contact ribs 11 protrude downward from the bottom surface of the bottom plate 4ba, extend in the short direction of the base portion 4, and are arranged side by side in the long direction of the base portion 4. As shown in FIG.
When the abutment portion (abutment rib 11) is in contact with the printed circuit board 2, the end portion (tip portion 7c) of the locking piece (locking claw 7) touches the printed circuit board at the first inclined surface 7d. 2 is in contact with the edge of the mounting hole 2a.

According to the above configuration, since the abutment portion (abutment rib 11) abuts against the printed circuit board 2, the tip portion 7c of the locking claw 7 can be locked to the edge of the mounting hole 2a at the same position. can. Therefore, the locking state of the locking claw 7 can be made more stable.
After elastically deforming the locking claw 7 of the tip portion 7c of the locking piece (locking claw 7) and inserting it into the mounting hole 2a of the printed circuit board 2, the first inclined surface 7d is formed so that the locking claw 7 is elastically deformed. This is a portion that abuts against the edge of the mounting hole 2a of the printed circuit board 2 when restored.

<Mounting Claw>
As shown in FIGS. 6 and 7 , the locking claws 7 are inserted together with the locking claws 7 into the mounting holes 2 a of the printed circuit board 2 inside the two locking claws 7 at both ends in the longitudinal direction of the base portion 4 . Mounting claws 15 projecting downward (mounting direction) from the bottom plate 4ba.
The mounting claws 15 are passed through the mounting holes 2 a together with the locking claws 7 when the coil component 1 is mounted on the printed circuit board 2 . The mounting claws 15 include an inner wall 15a inside the base portion 4 in the longitudinal direction, reinforcing walls 15b extending from the inner wall 15a, and extending from both ends of the reinforcing walls 15b in the longitudinal direction of the base portion 4 in the depth direction. Extending support walls 15c, 15d are integrally provided.

More specifically, the inner wall 15a is a plate piece extending in the depth direction of the base portion 4, and the reinforcing wall 15b extends from the center portion of the inner wall 15a in the depth direction to the outside of the base portion 4 in the longitudinal direction. It is a plate piece. Also, the inner wall 15a and the reinforcing wall 15b extend by the same amount in the mounting direction, and the supporting walls 15c, 15d are shorter than the length of the inner wall 15a and the reinforcing wall 15b.

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 apart from each other. The reason why the support walls 15c and 15d are formed apart from each other in this manner is to prevent the occurrence of sink marks during the injection molding of the base portion 4 and to reduce the thickness of the mounting claws 15 after molding. This is to improve the precision of molding so as to keep it constant.

<crushed ribs>
The base portion 4 includes crush ribs 10 that can be broken and locked by coming into contact with the edges of the holes (mounting holes 2 a ) of the printed circuit board 2 .
The crush rib 10 is locked to the edge of the hole (mounting hole 2a) of the printed circuit board 2 in a direction different from that of the locking piece (locking claw 7).
The crush rib 10 can eliminate (reduce as much as possible) the clearance from the edge of the printed circuit board 2 , suppress the rattling of the coil component 1 with respect to the printed circuit board 2 , and prevent the base portion 4 from contacting the printed circuit board 2 . The locked state can be stabilized.

The crush rib 10 in this embodiment is molded with a resin having a hardness lower than that of the printed circuit board 2 . The crush ribs 10 are provided at two locations on each of the two mounting claws 15 so as to protrude in the depth direction (the lateral direction (width direction) of the mounting hole 2a, which is an elongated hole). There are 8 locations.

The crush ribs 10 protrude from the outer surfaces on both sides in the depth direction of the support walls 15c and 15d of the mounting claw 15 and extend in the vertical direction.
In particular, as shown in FIG. 6, the crush rib 10 is formed so that the width in the longitudinal direction of the base portion 4 is narrowed so as to taper downward from the center portion in the vertical direction.

With this configuration, the load applied to the crush rib 10 from the edge surface of the mounting hole 2a can be gradually increased from the beginning of insertion of the mounting claw 15 (crush rib 10) into the mounting hole 2a.
That is, the load at the beginning of insertion of the crush rib 10 into the mounting hole 2a can be kept small, and the locking claw 7 can be smoothly inserted into the mounting hole 2a.

Furthermore, the crush rib 10 includes at least a portion provided above the lower end of the first inclined surface 7d, and is formed so that the amount of protrusion decreases from the central portion in the vertical direction to the downward direction, and is wedge-shaped. is formed in
Since the crush ribs 10 are formed in this way, the load at the beginning of insertion of the crush ribs 10 into the mounting holes 2a can be suppressed to be smaller, and the locking claws 7 can be smoothly inserted into the mounting holes 2a. can.

The crush rib 10 is tapered toward the distal end in the depth direction, as indicated by the dashed line in FIG. 7 before being press-fitted. With such a configuration, the load for breaking the tip of the crush rib 10 can be kept small.

For example, if the length of the mounting claw 15 and the length of the mounting hole 2a are completely the same in the depth direction, the crush rib 10 may not be used because there is no clearance between them.
However, considering manufacturing errors, it is difficult to manufacture such products in large quantities. Therefore, by adopting the crush rib 10, the crush rib 10 is destroyed by the load received from the edge of the mounting hole 2a, so that the clearance can be eliminated and the allowable range of manufacturing error can be widened. , the yield can be increased.

In this embodiment, the crush rib 10 is described as contacting the edge of the mounting hole 2a to which the locking claw 7 is locked, but the configuration is not limited to this. For example, it may be in contact with the edge of a hole (not shown) formed at a location different from the mounting hole 2a.

<Metal terminal part>
Next, the metal terminal portions 9X and 9Y around which the ends of the coil 5 are bound will be described mainly with reference to FIGS. 8 to 10. FIG.
FIG. 8(a) is a diagram showing the metal terminal portion 9Y of the VIII portion of FIG. It is the typical right side view.
FIG. 9(a) is a diagram showing the metal terminal portion 9Y of the VIII portion of FIG. , and a schematic right side view thereof.
FIG. 10(a) is a diagram showing the metal terminal portion 9Y of the portion VIII of FIG. 10(b) is a schematic right side view thereof.
Since the metal terminal portions 9X and 9Y have the same configuration, the metal terminal portion 9Y will be illustrated and described as a representative of the metal terminal portions 9X and 9Y.

The base portion 4 has metal terminal portions 9X and 9Y with which the ends of the coil 5 are bound.
The metal terminal portions 9X, 9Y are connected to at least some of the plurality of mounting terminals 6W, 6X, 6Y, 6Z (mounting terminals 6X, 6Y), and can be partially melted by welding. The metal terminal portions 9X and 9Y according to this embodiment are made of brass. Note that the metal terminal portions 9X and 9Y are not limited to such a configuration, and may be any one that can be melted and solidified by welding and that can suitably join the ends of the coil 5 .
As shown in FIG. 8, at least one of recesses 9Yc (or protrusions (not shown)) to which ends of the coil 5 are engaged is formed in the metal terminal portions 9X and 9Y.

By locking the ends of the coil 5 to the concave portion 9Yc (or the convex portion) as described above, the ends of the coil 5 can be tangled before the metal terminal portions 9X, 9Y and the ends of the coil 5 are welded. It can stabilize the position of the lift.

In this embodiment, the binding portion 13 of the coil 5 is provided adjacent to the metal terminal portions 9X and 9Y and the metal terminal portions 9X and 9Y, and extends upward from the side of the base portion 4 (base 4b). and a protruding portion 4d that is bent and protrudes in an L shape toward the front side.

More specifically, the metal terminal portion 9X is bent inside the standing wall 4c of the base portion 4 and formed integrally with the mounting terminal 6X.
The metal terminal portion 9Y is bent inside the standing wall 4c of the base portion 4 and formed integrally with the mounting terminal 6Y. formed. With such a configuration, the coil 5 , the capacitor chip 12 and the printed circuit board 2 can form a series resonance circuit.
Further, the capacitor chip 12 can be mounted on the printed circuit board 2 by providing the mounting terminals 6Z connected to the metal terminal portions 9Y.

The second winding portion 5c is wound around the metal terminal portion 9X and the projection portion 4d, the third winding portion 5e is wound around the metal terminal portion 9Y and the projection portion 4d, and two winding portions 13 are provided. It is As will be described later, the two binding portions 13 are integrally connected by welding.

The metal terminal portions 9X and 9Y are formed thinner on the tip side (tip portion 9Yb) than on the base end side (base end portion 9Ya), and a concave portion 9Yc is formed on the tip side (tip portion 9Yb).
According to the above configuration, the end portion of the coil 5 can be bound using the step 9Yd between the thick base end side (base end portion 9Ya) and the thin tip end side (tip portion 9Yb). It is possible to prevent the end portion of the coil 5 (the middle portion 5eb of the third winding portion 5e, which will be described later) from slipping downward (in the mounting direction).

Therefore, a predetermined amount of the middle portion 5eb of the third winding portion 5e can be reliably arranged inside the weld bead 9Ye shown in FIG. 10, and the joint strength by welding can be ensured. Furthermore, after welding, it is possible to prevent unnecessary play (looseness) from occurring in the lower portion 5ea of the third winding portion 5e.
Further, by tying the tip end portion of the coil 5 (an upper portion 5ec of the third winding portion 5e described later) of the coil 5 in the concave portion 9Yc, the tying position of the tip end portion of the coil 5 can be stabilized.

Moreover, according to the above configuration, it is possible to suppress the occurrence of variations in the binding positions of the ends of the coil 5 . Therefore, as shown in FIG. 10, when the upper portions of the metal terminal portions 9X and 9Y are melted by welding to form the weld bead 9Ye, the end of the coil 5 can be sufficiently covered with the weld bead 9Ye. , the bonding strength can be increased. As a result, disconnection of the ends of the coil 5 is suppressed.

More specifically, in the longitudinal direction of the coil component 1, the length of the tip side (tip portion 9Yb) of the metal terminal portions 9X and 9Y is formed shorter than the length of the base end side (base end portion 9Ya). .
Each of the metal terminal portions 9X and 9Y is formed plane-symmetrically with respect to an imaginary central plane extending in the longitudinal direction of the coil component 1 including the central axis.

The projecting portion 4d provided on the base 4b functions as a stopper for melting the metal terminal portions 9X and 9Y, and the upper curved portion of the projecting portion 4d prevents the upward movement of the lower portion 5ea of the third winding portion 5e. Act as a regulator. The projecting portion 4d is provided adjacent to each of the metal terminal portions 9X and 9Y, and is formed integrally with the flame-retardant resin base 4b.
Therefore, even if heat energy generated by welding the metal terminal portions 9X and 9Y is transmitted to the protrusion 4d, the protrusion 4d does not melt.
Therefore, as shown in FIG. 10, the projecting portion 4d has a base end portion 9Ya of the metal terminal portion 9Y located below the upper surface of the projecting portion 4d and a third wound portion 5e that is wrapped around the base end portion 9Ya. to prevent the lower portion 5ea from melting.

Since the lower portion 5ea of the third winding portion 5e can be prevented from melting in this way, the entwined portion of the lower portion 5ea is left, and the third winding portion 5e has a slight play in the radial direction with respect to the winding shaft. It will be connected to the base end portion 9Ya.
Therefore, when a tensile force is applied to the third winding portion 5e, it is possible to slightly displace the third winding portion 5e.

In this embodiment, the lower portion 5ea of the third wound portion 5e is wound around the base end portion 9Ya of the metal terminal portion 9Y and the projection portion 4d, and the middle portion 5eb of the third wound portion 5e is the metal terminal portion. The tip portion 9Yb of the portion 9Y is wound once, and the upper portion 5ec of the third winding portion 5e is wound once around the recessed portion 9Yc of the metal terminal portion 9Y, but the present invention is not limited to such a configuration. In other words, the number of turns of each portion of the third winding portion 5e with respect to the projection portion 4d or the metal terminal portion 9Y can be set arbitrarily.

<How to install coil parts>
A coil component mounting method according to an embodiment of the present invention will be described. The coil component mounting method according to the present embodiment includes a bonding step of preparing the coil component 1 and the printed circuit board 2, bonding at least a portion of the metal terminal portions 9X and 9Y to the ends of the coil 5, and a locking piece ( a mounting step of elastically deforming the locking claw 7) so as to pass through the mounting hole 2a; and a stopping step.
In the joining step, at least a portion of the metal terminal portions 9X and 9Y is melted by welding, and the end portions of the coil 5 that engage with the metal terminal portions 9X and 9Y are joined.

According to the above configuration, by locking the end of the coil 5 to the recess 9Yc (or a projection (not shown)), the end of the coil 5 can be welded to the metal terminal portions 9X and 9Y before the end of the coil 5 is welded. It is possible to stabilize the binding position of the ends.

Details of the joining process will be described with reference to FIG. 9, taking the metal terminal portion 9Y as a representative of the metal terminal portions 9X and 9Y.
First, an operator winds the end portion of the coil 5 at least once above the base 4b so as to bind the projection portion 4d and the base end portion 9Ya of the metal terminal portion 9Y, thereby forming the third winding portion 5e. forming the lower part 5ea of the
Next, the worker winds the end portion of the coil 5 at least once around only the tip portion 9Yb so as to hang over the step 9Yd, thereby forming the intermediate portion 5eb of the third wound portion 5e.
Finally, the operator winds the end portion of the coil 5 at least once around only the tip portion 9Yb so as to hang over the recessed portion 9Yc, thereby forming the upper portion 5ec of the third wound portion 5e.

By winding the coil 5 in this manner, the third winding portion 5e is formed. With regard to the third winding portion 5e formed in this way, 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 portion projecting to the front side of the projection portion 4d. The lower surface can limit upward movement of the lower portion 5ea.
Further, 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 vertical movement of the upper portion 5ec of the third winding portion 5e.

Since the third wound portion 5e is bound around the metal terminal portion 9Y in this manner, the state of the bound portion 13 can be stabilized in a stage prior to welding.

As described above, the lower portion 5ea of the third winding portion 5e that remains after welding is restricted from moving in the vertical direction by the upper surface of the base 4b and the lower surface of the projecting portion 4d that protrudes toward the front side. Displacement due to vibration can also be suppressed for parts other than the part.

<Regarding the mounting part of the electric element>
11 to 16, the mounting portion of the electrical element (for example, the capacitor chip 12 described above) will be described.
FIG. 11 is an enlarged perspective view showing the periphery of the land 16a on which the capacitor chip 12 is mounted, and FIG. 12 is a perspective view showing a state where the capacitor chip 12 is mounted on the land 16a.
FIG. 13 is a perspective view showing lead frames 16 (16X, 16Y, 16Z) and capacitor chip 12 attached to a portion (land 16a) of lead frames 16Y and 16Z.
14(a) is a schematic front view showing the surroundings of the land 16a before mounting the capacitor chip 12, and FIG. 14(b) is a schematic front view showing the surrounding of the land 16a after mounting the capacitor chip 12. FIG. It is a diagram.
FIG. 15A is a schematic front view showing an example in which through holes 400e are formed inside in the first direction from the edges of a pair of opposing lands 16a. FIG. 15(b) is a schematic front view showing an example in which a through hole 400f is formed inside the capacitor chip 12 in the second direction.
FIG. 16 is a schematic front view showing a through hole 4f formed across a pair of lands 16a on which the capacitor chip 12 is mounted and a pair of lands 16c on which the chip resistor 18 is mounted.
14 and 15, and FIG. 16, which will be described later, a portion of the base portion 4 near the through holes 4e, 4f, 400e, and 400f is shown in a simplified square shape.
14(b), 15 and 16, the capacitor chip 12 (and the chip resistor 18) is virtually shown by a two-dot chain line and a solid color.

12 and 13, the electric elements (for example, the capacitor chip 12 and the chip resistor 18 which will be described later) are soldered 17 to the lands 16a (16c) which are part of the lead frames 16Y and 16Z shown in FIG. are electrically and physically connected by
When the electric element is soldered onto the land 16a (16c) by the reflow method, as shown in FIG. .

In order to prevent the occurrence of such solder balls 17a, generally, (1) temperature conditions during reflow, (2) adjustment of solder paste application conditions (application amount), (3) solder paste material or application shape and (4) reconsideration of land dimensions.
Furthermore, when the coil component 1 is transported or when the coil component 1 is exposed to a vibrating environment such as when the coil component 1 is mounted on a vehicle or the like, it is necessary to remove the solder balls 17a. The inspection and removal processes for , are particularly required, and improvements have been sought. In particular, it is necessary to suppress the occurrence of the solder balls 17a in a surface mount type electrical element, not an electrical element constituting an integrated circuit.

A coil component 1 according to the present embodiment includes an electric element (capacitor chip 12) having a pair of terminals and conductive patterns (lead frames 16 (lead frames 16X, 16Y, 16Z)). The pattern (lead frames 16Y, 16Z) has a pair of lands 16a to which a pair of terminals 12a of the capacitor chip 12 are joined by solder 17. FIG.
A portion of the lead frame 16 is provided inside the base portion 4, and the pair of lands 16a are exposed from the base portion 4 to the outside.
A hole (through hole 4e) is formed in the base portion 4 at a position between the pair of lands 16a and overlapping the capacitor chip 12 joined to the land 16a.

The “electrical element” includes, in addition to the capacitor chip 12, a chip resistor 18 and the like, which will be described later.
The “hole” formed in the base portion 4 may be any one that can widen the space around the capacitor chip 12 . In other words, it is sufficient to avoid proximity between the base portion 4 and the capacitor chip 12, and the hole is not limited to the through hole 4e and may be a hole with a bottom.
In other words, it may be a depression in which a portion of the base portion 4 facing the capacitor chip 12 is thinner than the surroundings.
Strictly speaking, "the position overlapping the capacitor chip 12" is the position overlapping the capacitor chip 12 when viewed from the direction perpendicular to the pair of lands 16a.

According to the above configuration, since the holes are formed, it is possible to suppress the solder 17 melted during reflow from remaining in the portion between the pair of lands 16a of the capacitor chip 12, so that the solder 17 does not reach the lands 16a. Agglomerates easily. Therefore, it is possible to suppress the formation of solder balls 17a at the portions of capacitor chip 12 facing the holes (through holes 4e).
Since the holes are the through holes 4e, the aggregation of the solder 17 on the lands 16a can be further promoted during reflow, and the formation of solder balls 17a can be further suppressed.

The base portion 4 of this embodiment is insert-molded with the lead frame 16 shown in FIG. 13 inside.
The lead frame 16 according to 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 land 16a, and a land 16a paired with the one land 16a. and a lead frame 16Z having a
Specifically, the lead frame 16 according to the present embodiment is made of phosphor bronze, and is formed by stamping out a plate material having a thickness of 0.3 mm with a press and plating the entire surface with tin.

A capacitor chip 12 is joined by solder 17 between a pair of lands 16a.
The pair of lands 16a are firmly held by the base portion 4 by embedding both ends in the width direction thereof and the end portion on the side away from the other land 16a in the base portion 4 .
The base portion 4 according to the present embodiment is formed with a through hole 4e that extends in the vertical direction and penetrates in the thickness direction. A pair of lands 16a are provided. Incidentally, the through holes 4e according to the present embodiment are formed during resin molding.

The edge 4g of the hole (through hole 4e) is formed so as to overlap with the edge 16b on the opposite side of each of the pair of lands 16a, or, as shown in FIG. there is

Here, "formed to the outside of the edge 16b on the opposite side" means that in a direction perpendicular to the edge 16b on the opposite side of the pair of lands 16a (the first direction shown in FIG. 14), It means that the edge 16b on the opposite side is formed to the outside (in this embodiment, the upper and lower sides) on both sides. The term "outer side" means the outer side when the space between the pair of lands 16a is defined as the inner side.
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 land 16a. According to such a configuration, the solder 17 also aggregates on the mutually facing end surfaces of the pair of lands 16a.

In the configuration shown in FIG. 15A as a comparative example, the edge 400g of the hole (through hole 400e) is formed inside the edge 16b of each of the pair of lands 16a facing each other. In this configuration, the solder 17 may remain attached to the edge 400g of the through-hole 400e during reflow, and the remaining solder 17 may form a solder ball 17a.
On the other hand, according to the above configuration shown in FIG. 14(b), the edge 4g of the through hole 4e is not formed on the inner side away from the aggregated portion of the land 16a, so the solder 17 remains on the edge 4g during reflow. hard to do. Therefore, it is possible to suppress the formation of solder balls 17a on the edge 4g of the through-hole 4e that intersects the above direction (first direction described later).

In the plane of the pair of lands 16a on which the electric element (capacitor chip 12) is mounted, the direction connecting the pair of lands 16a is defined as the first direction, and the direction perpendicular to the first direction is defined as the second direction. At this time, the hole (through hole 4e) shown in FIG. 14(b) is formed wider to the outside than the capacitor chip 12 in the second direction when viewed from the direction perpendicular to the plane.
That is, in this state, the edge of the space on the side facing the capacitor chip 12 in the second direction is defined by the edge 16b of the land 16a.

In the configuration shown in FIG. 15B as a comparative example, the hole (through hole 400f) is formed on the same side as the capacitor chip 12 or inside the capacitor chip 12 in the second direction. In this configuration, the solder 17 may remain attached to the edges 400h of the through holes 400f during reflow, and the remaining solder 17 may form solder balls 17a.
On the other hand, according to the above configuration shown in FIG. 14(b), since the edge 4h is formed wider than the capacitor chip 12, the solder 17 is less likely to remain. Therefore, it is possible to suppress the formation of solder balls 17a between the capacitor chip 12 and the edges 4h of the through holes 4e intersecting in the second direction.

In the configuration shown in FIG. 16, a plurality of electric elements are provided (capacitor chip 12 and chip resistor 18). A plurality of pairs of lands 16a and 16c provided on the pattern (lead frame 16) are provided corresponding to the terminals 12a and 18a of the electric elements (capacitor chip 12 and chip resistor 18).
The hole (through hole 4f) extends across the pairs of lands 16a and 16c.

Although the electric elements in this embodiment are only two, the capacitor chip 12 and the chip resistor 18, a plurality of electric elements may be provided.
According to the above configuration, it is possible to suppress the formation of solder balls 17a in the portions of the base portion 4 facing the plurality of electric elements due to the holes (through holes 4f) bridging between the plurality of pairs of lands 16a and 16c.

The above embodiments and modifications include the following technical ideas.
(1) A coil component mounted on a printed circuit board having mounting holes formed in the thickness direction,
a core;
a coil wound around the core;
a base holding the core;
a plurality of mounting terminals at least partially electrically conductive to the coil and the printed circuit board and held by the base;
The base portion has an elastically deformable locking piece,
The coil component, wherein the locking piece can pass through the mounting hole by being elastically deformed, and can be locked to the edge of the mounting hole by elastically restoring.
(2) The coil component according to (1), wherein the locking piece extends in the same direction as the extension direction of the mounting terminal, which is the mounting direction on the printed circuit board.
(3) the base portion has an elastically deformable holding piece that holds the core;
The coil component according to (1) or (2), wherein the holding piece holds the core in an elastically deformed state.
(4) the base portion is formed to be long,
The coil component according to any one of (1) to (3), wherein the pair of locking pieces are provided at both ends in the longitudinal direction.
(5) The base portion is formed to be long,
The locking piece protrudes outward in the longitudinal direction of the base portion from above the central portion of the end portion of the base portion, and extends in a curved manner toward the mounting direction on the printed circuit board. The coil component according to any one of (1) to (4).
(6) The ends of the locking pieces are
a first inclined surface inclined toward the elastically restored side toward the distal end;
any one of (1) to (5), further comprising a second inclined surface provided closer to the distal end side than the first inclined surface and inclined toward the elastically deformable side toward the distal end side; Coil parts described in .
(7) the core is elongated and has a flat cross-sectional shape including long sides and short sides in a cross section perpendicular to the longitudinal direction;
The coil component according to any one of (1) to (6), wherein the core is erected so that the long side faces the mounting direction on the printed circuit board and is supported by the base portion. .
(8) the base portion has a metal terminal portion to which the end portion of the coil is bound;
the metal terminal portion is connected to at least a portion of the plurality of mounting terminals and is partially meltable by welding;
The coil component according to any one of (1) to (7), wherein the metal terminal portion is formed with at least one of a concave portion and a convex portion to which the end portion of the coil engages.
(9) the metal terminal portion is formed thinner on the distal end side than on the proximal end side;
The coil component according to (8), wherein the recess is formed on the tip side.
(10) an electrical element having a pair of terminals;
and a conductive pattern,
the pattern has a pair of lands to which the pair of terminals of the electrical element are soldered;
A portion of the pattern is provided inside the base portion,
The pair of lands are exposed to the outside from the base portion,
The coil component according to any one of (1) to (9), wherein a hole is formed between the pair of lands in the base portion so as to overlap the electric element joined to the land.
(11) The coil component according to (10), wherein the edge of the hole is formed so as to overlap with the edge of each of the pair of lands on the opposing side, or extends beyond the edge on the opposing side.
(12) In the plane of the pair of lands on which the electric element is mounted, when the direction connecting the pair of lands is defined as a first direction and the direction perpendicular to the first direction is defined as a second direction,
The coil component according to (10) or (11), wherein the hole is formed wider to the outside than the electric element in the second direction when viewed from a direction perpendicular to the plane.
(13) A plurality of the electric elements are provided,
A plurality of pairs of lands provided on the pattern are provided corresponding to the terminals of the electric element,
The coil component according to any one of (10) to (12), wherein the hole extends across the plurality of pairs of lands.
(14) the coil component according to any one of (1) to (13);
An electric device with a coil component, comprising: the printed circuit board.
(15) The base portion includes crush ribs that can be broken and locked by coming into contact with the edge of the hole of the printed circuit board,
The electric device with a coil component according to (14), wherein the crush rib is engaged with the edge of the hole of the printed circuit board in a direction different from that of the engaging piece.
(16) the coil component according to (6);
and the printed circuit board,
The coil component has a contact portion that contacts the printed circuit board when attached to the printed circuit board,
When the contact portion is in contact with the printed circuit board, the end portion of the locking piece is in contact with the edge of the mounting hole of the printed circuit board on the first inclined surface. device.
(17) Prepare the coil component according to (8) or (9) and the printed circuit board,
a joining step of joining at least part of the metal terminal portion to an end portion of the coil;
a mounting step of elastically deforming the locking piece so as to pass it through the mounting hole;
After the mounting step, a locking step of elastically restoring the locking piece to lock it on the edge of the mounting hole,
A method of attaching a coil component, wherein in the joining step, at least a part of the metal terminal portion is melted by welding to join the end portion of the coil to be locked to the metal terminal portion.
(18) The coil component according to (4), wherein the pair of locking pieces are elastically deformed and elastically restored in directions opposite to each other so as to be lockable to the edge of the mounting hole.
(19) The locking piece has an extending portion extending in the mounting direction on the printed circuit board on the base end side of the first inclined surface,
The coil component according to (6), wherein the second inclined surface extends to the elastically deforming side of the extending portion.
(20) comprising a core, a coil wound around the core, a base portion holding the core, and a plurality of mounting terminals for mounting on a printed circuit board;
The base portion has a metal terminal portion to which the end portion of the coil is bound,
the metal terminal portion is connected to at least a portion of the plurality of mounting terminals and is partially meltable by welding;
A coil component according to claim 1, wherein the metal terminal portion is formed with at least one of a concave portion and a convex portion to which an end portion of the coil is engaged.
(21) A coil component attached to a printed circuit board,
a core;
a coil wound around the core;
a base holding the core;
an electrical element having a pair of terminals;
a conductive pattern,
the pattern has a pair of lands to which the pair of terminals of the electrical element are soldered;
A portion of the pattern is provided inside the base portion,
The pair of lands are exposed to the outside from the base portion,
A coil component, wherein a hole is formed in the base portion at a position between the pair of lands that overlaps the electric element joined to the land.

This application claims priority based on a Japanese application (Japanese Patent Application No. 2019-122994) filed on July 1, 2019, and incorporates all of its disclosure herein.

1X Antenna device (Electrical equipment with coil parts)
1 coil component 2 printed circuit board 2a mounting hole 2b insertion hole 3 core 3a long side 3b short side 4 base portion 4a bobbin 4b base 4ba bottom plate 4bb support rib 4bc side wall 4bd lever 4c vertical wall 4ca bridging portion 4d protrusion 4e, 4f through hole ( hole)
4g, 4h edge 5 coil 5a first winding portion 5b first path portion 5c second winding portion 5d second path portion 5e third winding portion 5ea lower portion 5eb middle portion 5ec upper portion 6W, 6X, 6Y, 6Z mounting terminal 7 Locking pawl (locking piece)
7a projecting portion 7b extending portion 7c tip portion 7d first inclined surface 7e second inclined surface 7f distal end portions 8X, 8Y holding claws (holding pieces)
8Xa base end 8Xb extension 8Xc tip 9X, 9Y metal terminal 9Ya base 9Yb tip 9Yc recess 9Yd step 9Ye weld bead 10 crush rib 11 contact rib (contact part)
12 Capacitor chip (electric element)
12a terminal 13 binding part 14 insulating tape 15 mounting claw 15a inner wall 15b reinforcing wall 15c, 15d support wall 16, 16X, 16Y, 16Z lead frame (pattern)
16a, 16c Land 16b Edge 17 Solder 17a Solder ball 18 Chip resistor (electric element)
18a terminals 400e, 400f through holes 400g, 400h edges

TECHNICAL FIELD The present invention relates to a coil component and an electrical device with a coil component that includes the coil component and a printed circuit board.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a coil component and an electric device with the coil component, which enables the coil component and the printed circuit board to be suitably installed in an operating device such as a vehicle. .

ADVANTAGE OF THE INVENTION According to this invention, the coil component which can suitably install a coil component and a printed circuit board in operation apparatus, such as a vehicle, and an electric equipment with a coil component are provided.

Claims (16)

A coil component mounted on a printed circuit board having a mounting hole formed in the thickness direction,
a core;
a coil wound around the core;
a base holding the core;
a plurality of mounting terminals at least partially electrically conductive to the coil and the printed circuit board and held by the base;
The base portion is formed to be long and has an elastically deformable locking piece,
The locking piece protrudes outward in the lengthwise direction of the base portion from above the central portion of the end portion of the base portion, and extends in a curved manner toward the mounting direction on the printed circuit board. 1. A coil component, characterized in that it can pass through said mounting hole by being elastically deformed, and can be locked to the edge of said mounting hole by elastically restoring. A coil component mounted on a printed circuit board having a mounting hole formed in the thickness direction,
a core;
a coil wound around the core;
a base holding the core;
a plurality of mounting terminals at least partially conductive to the coil and the printed circuit board and held by the base;
an electrical element having a pair of terminals;
a conductive pattern,
The base portion has an elastically deformable locking piece,
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,
The pattern has a pair of lands to which the pair of terminals of the electrical element are joined by soldering,
A portion of the pattern is provided inside the base portion,
The pair of lands are exposed to the outside from the base portion,
A coil component, wherein a hole is formed in the base portion at a position between the pair of lands that overlaps the electric element joined to the land. 3. The coil component according to claim 2, wherein the edge of the hole is formed so as to overlap with the edge of each of the pair of lands on the opposing sides, or is formed to extend beyond the edge on the opposing side. In the plane of the pair of lands on which the electric element is mounted, when the direction connecting the pair of lands is defined as a first direction and the direction perpendicular to the first direction is defined as a second direction,
4. The coil component according to claim 2, wherein said hole is formed wider to the outside than said electric element in said second direction when viewed from a direction perpendicular to said plane. A plurality of the electric elements are provided,
A plurality of pairs of lands provided on the pattern are provided corresponding to the terminals of the electric element,
The coil component according to any one of claims 2 to 4, wherein the hole extends across the plurality of pairs of lands. The coil component according to any one of claims 1 to 5, wherein the locking piece extends in the same direction as the extending direction of the mounting terminal, which is the mounting direction on the printed circuit board. The base portion is formed in an elongated shape,
The coil component according to any one of claims 1 to 6, wherein the pair of locking pieces are provided at both ends in the longitudinal direction. The ends of the locking pieces are
a first inclined surface inclined toward the elastically restored side toward the distal end;
8. The second inclined surface provided closer to the distal end than the first inclined surface and inclined toward the elastically deformable side toward the distal end. coil parts. The core is formed long and has a flat cross-sectional shape including a long side and a short side in a cross section perpendicular to the long direction,
The coil component according to any one of claims 1 to 8, wherein the core is supported by the base portion in a state where the core is erected so that the long side faces the mounting direction on the printed circuit board. The base portion has a metal terminal portion to which the end portion of the coil is bound,
the metal terminal portion is connected to at least a portion of the plurality of mounting terminals and is partially meltable by welding;
The coil component according to any one of claims 1 to 9, wherein the metal terminal portion is formed with at least one of a concave portion and a convex portion to which an end portion of the coil engages. The metal terminal portion is formed thinner on the distal end side than on the proximal end side,
11. The coil component according to claim 10, wherein said recess is formed on said tip side. The base further has an elastically deformable holding piece that holds the core,
The holding piece has a slanted surface at the tip that slopes away from the accommodation position of the core as it goes toward the tip, and the tip pushes the core in an elastically deformed state to hold the core. The coil component according to any one of claims 1 to 11. a coil component according to any one of claims 1 to 12;
An electric device with a coil component, comprising: the printed circuit board. the base portion includes crush ribs that can be broken and locked by coming into contact with the edge of the hole of the printed circuit board;
The crush rib is engaged with the edge of the hole of the printed circuit board in a direction different from the engaging direction of the engaging piece, and the crush rib is engaged with the edge of the hole of the printed circuit board. 14. The electric device with a coil component according to claim 13, wherein the width in the longitudinal direction of the base portion is narrowed so as to be tapered. a coil component according to claim 8;
and the printed circuit board,
The coil component has a contact portion that contacts the printed circuit board when attached to the printed circuit board,
When the contact portion is in contact with the printed circuit board, the end portion of the locking piece is in contact with the edge of the mounting hole of the printed circuit board on the first inclined surface. device. Prepare the coil component according to claim 10 or 11 and the printed circuit board,
a joining step of joining at least part of the metal terminal portion to an end portion of the coil;
a mounting step of elastically deforming the locking piece so as to pass it through the mounting hole;
After the mounting step, a locking step of elastically restoring the locking piece to lock it on the edge of the mounting hole,
A method of attaching a coil component, wherein in the joining step, at least a part of the metal terminal portion is melted by welding to join the end portion of the coil to be locked to the metal terminal portion.

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