CN114041239A - Coil component, electric device with coil component, and coil component mounting method - Google Patents

Abstract

The coil component (1) is a component which is mounted by partially inserting a printed 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 are capable of conducting with 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 through elastic deformation, and can be locked on the edge of the mounting hole through elastic restoration.

Description

Coil component, electric device with coil component, and coil component mounting method

Technical Field

The present invention relates to a coil component, an electric apparatus with a coil component including a coil component and a printed circuit board, and a coil component mounting method.

Background

A keyless entry system is put to practical use, which can lock or unlock a door of an automobile, a house, or the like by transmitting and receiving a signal radio wave without directly contacting the door. In order to realize a keyless entry system, a coil antenna such as an LF (Low Frequency) transmission antenna capable of transmitting and receiving a radio wave is widely used. In addition, a coil antenna is also widely used in a so-called radio-controlled timepiece that performs accurate time adjustment using radio waves.

Further, a coil component composed of a magnetic core and a winding coil is suitably used for the coil antenna.

For example, patent document 1 discloses a coil component for a keyless entry system (patent document 1 describes an antenna device). The coil component is mounted to the vehicle by fitting the locking body to the lower surface of the case as a component.

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

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2011-205616

Disclosure of Invention

Problems to be solved by the invention

However, a vehicle that applies large vibration to a motorcycle or the like is also used as the keyless entry system. However, when the LF transmission antenna is provided on the printed circuit board, when large vibration is repeatedly applied in such an environment, it is difficult to ensure vibration resistance due to the weight of the antenna.

In this regard, in order to ensure the vibration resistance of the coil component, the coil component disclosed in patent document 1 needs to be separated from the control device and mounted on the vehicle.

Therefore, it is necessary to secure an installation place of the coil component independently of the control device, and accordingly, installation places are increased, and installation labor and time are required, and it is necessary to secure an installation range, which may affect vehicle design.

The present invention has been made in view of the above-described problems, and provides a coil component, an electric device with a coil component, and a coil component mounting method, which enable appropriate installation of the coil component and a printed circuit board in a moving device such as a vehicle.

Means for solving the problems

According to the present invention, there is provided a coil component to be mounted on a printed circuit board having a mounting hole formed in a thickness direction, the coil component including: a core; a coil wound around the core; a base portion for holding the core; and a plurality of mounting terminals, at least a part of which can be electrically connected to the coil and the printed circuit board, the plurality of mounting terminals being held by the base portion, the base portion having an elastically deformable locking piece that can be inserted through the mounting hole by elastic deformation.

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

Further, according to the present invention, there is provided a coil component mounting method in which the coil component and the printed board are prepared, the coil component mounting method including the steps of: a bonding step of bonding at least a part of the metal terminal portion to an end portion of the coil; an installation step of causing the locking piece to pass through the installation hole by elastically deforming the locking piece; and a locking step of elastically restoring the locking piece after the mounting step to lock the locking piece to the edge of the mounting hole, 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 locked to the metal terminal portion.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, it is possible to provide a coil component, an electric device with a coil component, and a coil component mounting method, which can appropriately install the coil component and a printed circuit board in a moving device such as a vehicle.

Drawings

Fig. 1 is a front view of an antenna device.

Fig. 2 is a perspective view showing the bottom surface side of the antenna device.

Fig. 3 is a perspective view showing a front side of the antenna device.

Fig. 4 is a perspective view showing the back side of the antenna device.

Fig. 5 is an enlarged view of a V portion of fig. 4 showing the holding claw.

Fig. 6 is a schematic front view showing a state in which the locking claw and the collision prevention rib are locked in the mounting hole of the printed circuit board.

Fig. 7 is a schematic bottom view showing a state in which the locking claw and the collision prevention rib are locked in the mounting hole of the printed circuit board.

Fig. 8 (a) is a schematic front view showing a metal terminal portion of the VIII portion of fig. 1, and shows a state before the end portion of the coil is wound, and fig. 8 (b) is a schematic right side view showing a metal terminal portion of the VIII portion of fig. 1, and shows a state before the end portion of the coil is wound.

Fig. 9 (a) is a schematic front view showing a metal terminal portion of the VIII portion of fig. 1, and shows a state after an end portion of the coil is wound, and fig. 9 (b) is a schematic right side view showing a state after an end portion of the coil is wound, and shows a metal terminal portion of the VIII portion of fig. 1.

Fig. 10 (a) is a schematic front view showing a metal terminal portion of the VIII portion of fig. 1, and shows a state after the metal terminal portion and an end portion of the coil are welded, and fig. 10 (b) is a schematic right side view showing a state after the metal terminal portion of the VIII portion of fig. 1 and the end portion of the coil are welded.

Fig. 11 is an enlarged perspective view showing the periphery of a pad on which a capacitor chip is mounted.

Fig. 12 is a perspective view showing a state where a capacitor chip is mounted on a pad.

Fig. 13 is a perspective view showing a lead frame and a capacitor chip mounted to a portion of the lead frame.

Fig. 14 (a) is a schematic front view showing the periphery of a pad before a capacitor chip is mounted, and fig. 14 (b) is a schematic front view showing the periphery of a pad after a capacitor chip is mounted.

Fig. 15 (a) is a schematic front view showing an example in which a through hole is formed in a position inward of edges of the pair of opposing pads in the 1 st direction, and fig. 15 (b) is a schematic front view showing an example in which a through hole is formed in a position inward of the capacitor chip in the 2 nd direction.

Fig. 16 is a schematic front view showing through holes formed across a pair of pads to be mounted on a capacitor chip and a pair of pads to be mounted on a chip resistor.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The embodiments described below are merely examples for facilitating understanding of the present invention, and are not intended to limit the present invention. That is, the shape, size, arrangement, and the like of the members described below can be modified or improved without departing from the gist of the present invention, and it is needless to say that the present invention includes equivalents thereof.

Further, the various components of the present invention do not need to be independent of each other, and the following cases are permissible: a case where a plurality of components are configured as a single component; a case where one component is divided into a plurality of components; a case where a certain constituent element is a part of other constituent elements; a part of a certain component may overlap with a part of another component.

In addition, in all the drawings, the same components are denoted by the same reference numerals, and overlapping description is omitted as appropriate. In the present specification, the description will be given with respect to the vertical direction, and this is set as an expedient for explaining the relative relationship between the constituent elements, and is not intended to limit the direction of the product of the present invention at the time of manufacture or at the time of use. In particular, in the present embodiment, the mounting direction is a downward direction, and the opposite direction is an upward direction, and does not necessarily coincide with the upward and downward direction in the gravity direction.

< summary of coil parts >

First, the outline of the coil component 1 will be described mainly with reference to fig. 1 to 4.

Fig. 1 is a front view of an antenna device 1X (coil component 1) according to the present embodiment, and fig. 2 is a perspective view showing a bottom surface of the antenna device 1X. Fig. 3 is a perspective view showing the front side of the antenna device 1X, and fig. 4 is a perspective view showing the back side of the antenna device 1X.

The coil component 1 is a component in which a part is inserted and mounted on the printed substrate 2 having a mounting hole 2a formed in a 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 for holding the core 3; and a plurality of mounting terminals 6W, 6X, 6Y, 6Z discussed later, at least a part of which ( mounting terminals 6X, 6Y, 6Z) can be brought into conduction with the coil 5 and the printed substrate 2, the plurality of mounting terminals 6W, 6X, 6Y, 6Z being held by the base portion 4.

The base portion 4 has an elastically deformable engagement piece (engagement claw 7). The locking piece (locking claw 7) is characterized by being capable of passing through the mounting hole 2a by elastic deformation and being locked to the edge of the mounting hole 2a by elastic restoration.

An electrical device (antenna device 1X) with a coil component includes a coil component 1 and a printed circuit board 2.

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

Specifically, when vibration is applied to the antenna device 1X, the coil component 1 and the printed circuit board 2 can be prevented from rattling with each other, and thus, an impact force applied therebetween can be suppressed. In addition, it is possible to suppress the increase in the vibration amplitude of the coil component 1 as compared with the vibration amplitude of the printed circuit board 2.

Therefore, the coil component 1 mounted on the printed circuit board 2 can be indirectly mounted on the vehicle or the like by only mounting the printed circuit board 2 on a part of the vehicle or the like. Therefore, the number of installation locations of these components to be installed on the vehicle or the like can be reduced, and the installation range can be narrowed.

In the present specification, the term "vehicle or the like" refers to an unmanned aircraft such as an automobile, a motorcycle, a ship, a jet ski, an aircraft, and an unmanned aerial vehicle, and refers to an operating device including a mechanism that can be operated by radio waves.

In the above, one component may be divided into a plurality of components. For example, the base portion 4 is provided for holding the core 3 and the mounting terminals 6W, 6X, 6Y, 6Z, but a plurality of members may hold the core 3 and the mounting terminals 6W, 6X, 6Y, 6Z, respectively. That is, the base portion 4 may be constituted by a plurality of members instead of one member.

Further, although the description has been given of the structure in which at least some of the mounting terminals 6W, 6X, 6Y, and 6Z are configured to be able to be electrically connected to the coil 5 and the printed circuit board 2, the structure includes a structure in which these are configured to be able to be electrically connected via another conductive member.

In addition, the phrase "the locking piece (the 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 a natural state.

The "locking piece" is not limited to the claw-shaped locking claw 7 which is elastically deformed in the linear direction and elastically restored to the original shape, which will be described later, and may be, for example, a block-shaped locking member formed of a plurality of cut pieces which are elastically deformed in the radial direction and elastically restored to the original shape.

In the present embodiment, the mounting terminals 6W, 6X, 6Y, and 6Z are soldered to the printed board 2 by soldering through a plurality of through holes 2b (see fig. 2) provided in the printed board 2. 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 the impact applied to the solder portions of the mounting terminals 6W, 6X, 6Y, and 6Z can be alleviated to a degree corresponding to the load received by the locking claw 7 among the loads generated by the vibration applied to the antenna device 1X. Therefore, the bonding of the mounting terminals 6W, 6X, 6Y, 6Z to the printed board 2 is easily maintained.

The mounting terminals 6X, 6Y, and 6Z of the present embodiment are used for conduction with the conductor wiring of the printed circuit board 2, and the mounting terminal 6W is provided for more secure mounting of the coil component 1 to the printed circuit board 2, without conduction with the conductor wiring of the printed circuit board 2.

For example, if the stability of mounting 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 mounting terminal 6Z is not an essential component as long as it is a member not provided with the capacitor chip 12 described later. On the other hand, if the stability is not sufficiently ensured, a plurality of mounting terminals may be further provided.

< core >

The core 3 is for amplifying the magnetic field generated from the coil 5, and as shown in fig. 4, a part of the back surface side is exposed and a part of the back surface side is housed inside the base portion 4. The core 3 is formed lengthwise, and has a flat sectional shape (rectangular shape) including a long side 3a and a short side 3b in a cross section perpendicular to the lengthwise direction.

The cross-sectional shape of the core 3 of the present embodiment is a rectangular shape, and may be a rounded cross-sectional shape or a C-chamfered cross-sectional shape.

Examples of the material of the core 3 include a material (ferrite core) made of a ceramic containing iron oxide as a main component, a material (amorphous core) made of an amorphous alloy, a material (dust core) obtained by compression molding metal powder, and a material (laminated core) having a laminated structure in which a plurality of electromagnetic steel sheets are electrically insulated.

The core 3 is mounted to the base portion 4 from the back side in such a manner as to support the lower surface on a support rib 4bb provided to the base 4b and to be disposed upright along an upright wall 4c discussed later, which is discussed in detail later. The core 3 receives the elastic restoring force directed forward and downward from the holding claws 8X and 8Y on the upper surface and the rear surface, and holds the posture of the core 3.

< coil >

The coil 5 is an element that becomes a main part of an inductance element in a series resonant circuit of the coil component 1, and includes: the 1 st winding portion 5a, the 1 st path portion 5b, the 2 nd winding portion 5c, the 2 nd path portion 5d, and the 3 rd winding portion 5 e.

The 1 st winding portion 5a is an inductance element in the coil 5 and is a portion wound around the bobbin 4 a. An insulating tape 14 for electrical insulation is wound around the outer periphery of the 1 st winding portion 5 a.

The 1 st path portion 5b forms a routing path from one end side of the 1 st winding portion 5a to a metal terminal portion 9X to be discussed later.

The 2 nd winding portion 5c is located on the destination side from the 1 st path portion 5b and is wound around the metal terminal portion 9X.

The 2 nd path portion 5d forms a routing path from the other end side of the 1 st winding portion 5a to a metal terminal portion 9Y to be discussed later.

The 2 nd winding portion 5e is located on the destination side from the 2 nd path portion 5d and is wound around the metal terminal portion 9Y.

< base part >

The base portion 4 is formed of an insulating material such as resin, and is a portion composed of: a bobbin 4a located at a central portion in the longitudinal direction, around which the 1 st winding portion 5a of the coil 5 is wound; and bases 4b, which are other portions, formed on both sides of the bobbin 4 a. The base portion 4 insulates the core 3 housed inside from the coil 5 wound around the bobbin 4 a.

The bobbin 4a is formed in a C-shape having a rectangular cross section so that a central portion of the core 3 can be disposed inside the bobbin, extends in the longitudinal direction, and constitutes a part of the front-side standing wall 4C.

The base 4b includes: a bottom plate 4 ba; the other part of the standing wall 4c standing upward from the front-side end of the bottom plate 4 ba; and side walls 4bc that are provided so as to stand upward from end portions of the bottom plate 4ba located on both sides in the longitudinal direction of the base portion 4.

The bottom plate 4ba is provided with a plurality of support ribs 4bb, each of which 4bb protrudes upward, extends in the lateral direction (depth direction) of the base portion 4 to a length longer than the length of the core 3, and is provided in the longitudinal direction of the base portion 4. The support ribs 4bb serve to 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, as shown in fig. 4 and 5, the base portion 4 (base 4b) has elastically deformable holding pieces (holding claws 8X, 8Y) that hold the core 3 pressed from above. Fig. 5 is an enlarged view of a 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 the elastically deformed state can always apply the biasing force to the core 3, and the fixed state of the core 3 to the base portion 4 can be further stabilized. The core 3 of the present embodiment is completely bonded and fixed to the base portion 4 with an epoxy adhesive.

The "holding pieces (holding claws 8X and 8Y) hold the core 3 in an elastically deformed state. In other words, the holding pieces (holding claws 8X and 8Y) can pass the core 3 from the outside to the housed position by elastic deformation, and can hold the core 3 at the housed 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 to the upper end of the standing wall 4 c.

More specifically, the holding claw 8X includes: a basal end portion 8 Xa; an extension portion 8Xb extending obliquely rearward and downward from the proximal portion 8 Xa; and a tip portion 8Xc provided to an end of the extension portion 8 Xb.

The distal end portion 8Xc has an inclined surface inclined upward toward the back surface side, and is formed in an inverted triangular prism shape.

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 operator abuts against the upward inclined surface of the distal end portion 8Xc and further presses it, and the holding claw 8X is naturally elastically deformed upward.

When the core 3 is disposed at a position along the standing wall 4c, the holding claw 8X is elastically restored 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.

The holding claw 8Y is provided on the opposite side of the holding claw 8X with the bobbin 4a interposed therebetween, and is formed to project rearward from the inner end of the rod 4bd, as shown in fig. 4, the rod 4bd projecting inward in the longitudinal direction from the upper end and the front end (front side end) of the side wall 4 bc.

More specifically, the holding claws 8Y have the same configuration as the holding claws 8X, and therefore, the description thereof is omitted.

The core 3 is supported by the base portion 4 in a state in which the core 3 stands so that the long side 3a faces the mounting direction in which the printed circuit board 2 is mounted.

By supporting the core 3 on the base portion 4 in the upright state in this manner, the mounting space for mounting on the printed circuit board can be appropriately secured without narrowing the area in the surface direction of the printed circuit board 2.

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

< locking claw >

Next, referring to fig. 6 and 7 in addition to fig. 4, description will be given of a locking claw 7, in which the locking claw 7 has a function of being locked to an edge of the mounting hole 2a shown in fig. 2 formed in the printed circuit board 2. 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 the state. In addition, a dashed line portion at the impact rib 10 in fig. 7 is used to indicate a shape before press-fitting (before breaking).

The base portion 4 is formed lengthwise as described above, and a pair of locking pieces (locking claws 7) are provided at both ends (side walls 4bc) in the lengthwise direction of the base portion 4.

As described above, by providing the locking pieces (locking claws 7) at both ends of the base portion 4 in the longitudinal direction, stress applied at the time of locking can be applied to a wide range of the base portion 4, and the locked state of the base portion 4 with respect to the printed circuit board 2 can be stabilized, which is preferable.

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

With this configuration, the worker can insert the locking claws 7 into the mounting hole 2a by pressing the locking claws inward in the longitudinal direction of the base portion 4.

In other words, the pair of locking claws 7 are arranged at positions that can be accommodated and inserted into the mounting hole 2a when elastically deformed.

The pair of locking claws 7 is arranged at a position intersecting with the edge of the mounting hole 2a when elastically restored (including a state of restoration process in addition to a natural state).

The pair of locking claws 7 is elastically deformed inward in the longitudinal direction of the base portion 4 and elastically restored outward in the longitudinal direction, but may be configured to be reversed. That is, the pair of locking claws 7 may be elastically deformed outward in the longitudinal direction of the base portion 4 and elastically restored inward in the longitudinal direction.

Further, if the portion where the locking claw 7 is provided is at least one side in the longitudinal direction of the base portion 4, the elastic restoring force can be always applied to the portion that swings much because it is a longitudinal member, and therefore, suppression of vibration is effective and appropriate, but the present invention is not limited to such a configuration. For example, the base portion 4 may be provided on at least one side in the lateral direction.

Further, the locking piece of the present invention is not limited to the locking piece constituted by a pair, and only one may be an elastically deformable locking piece, and the other may be a plastically deformable locking piece or a non-deformable locking piece.

The locking piece (locking claw 7) extends 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 to the printed circuit board 2.

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

Specifically, the distal end sides (the extending portion 7b and the distal end portion 7c) of the locking pieces (the locking claws 7) located on the bent destination side extend in the same direction as the mounting terminals 6W, 6X, 6Y, and 6Z.

More specifically, the locking piece (locking claw 7) protrudes outward in the longitudinal direction of the base portion 4 from a position above the central portion at the end portion (side wall 4bc) of the base portion 4 (protruding portion 7a) and extends in a curved manner so as to face a mounting direction (downward in the present embodiment) in which the printed circuit board 2 is mounted (extending portion 7 b). That is, the locking piece (locking claw 7) includes an extending portion 7b extending in the mounting direction of the printed circuit board 2.

The extending portion 7b is provided closer to the base end side than the 1 st inclined surface 7d to be described later.

The locking piece (locking claw 7) protrudes from the end portion of the base portion 4 above the central portion and extends so as to be curved toward the mounting direction in which the printed circuit board 2 is mounted, so that the restoring force corresponding to the amount of deflection can be increased as compared with a 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.

The locking claw 7 may be a member that does not have a curved portion continuous with the protruding portion 7a and the extending portion 7b that protrude outward in the longitudinal direction of the base portion 4, but that extends linearly.

The end (distal end portion 7c) of the locking piece (locking claw 7) has: a 1 st inclined surface 7d inclined so as to be directed toward the elastic recovery side as it is directed toward the tip end side; and a 2 nd inclined surface 7e provided on the tip end side of the 1 st inclined surface 7d and inclined so as to be elastically deformed toward the tip end side.

Specifically, the 2 nd inclined surface 7e extends toward the side (the inner side in the longitudinal direction of the base portion 4) where the locking claw 7 is elastically deformed with respect to (the inner side surface of) the extending portion 7 b.

As described above, if 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 mounting direction of the printed circuit board 2 due to the reaction force against the elastic restoring force of the locking claw 7 applied from the edge of the mounting hole 2a, and the locked state is stabilized. Further, by forming the 1 st inclined surface 7d as described above, when the 1 st inclined surface 7d is in contact with the edge surface of the mounting hole 2a and the locking claw 7 is in the elastically deformed state, the amount of deflection of the distal end portion 7c can be increased as compared with the amount of deflection of a member, not shown, having the same outer surface shape from the proximal end to the distal end. Therefore, the elastic restoring force of the locking claw 7 can be increased.

Further, by providing the 2 nd inclined surface 7e, the locking claw 7 can be easily inserted into the mounting hole 2a by being elastically deformed when the coil component 1 is mounted on the printed circuit board 2.

Specifically, even if the outer edge of the mounting hole 2a is located on the center side of the inner surface of the extending portion 7b (the center side of the coil component 1), the 2 nd inclined surface 7e may be in a positional relationship of abutting against the outer edge of the mounting hole 2 a. As long as the 2 nd inclined surface 7e and the mounting hole 2a are in such a positional relationship, a reaction force having a component directed toward the inside in the longitudinal direction of the base portion 4 in the normal direction of the 2 nd inclined surface 7e is applied to the locking claw 7 from the edge on the outside of the mounting hole 2 a.

Therefore, by merely pressing the coil component 1 in the mounting direction, even if a load is not applied to the locking claw 7 in the inward 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 inserted into the mounting hole 2a from the distal end portion 7f (see fig. 4).

The coil component 1 (the base 4b of the base portion 4) has an abutting portion (abutting rib 11) that abuts against the printed circuit board 2 when mounted on the printed circuit board 2.

Specifically, the abutment ribs 11 protrude downward from the lower surface of the bottom plate 4ba, extend in the lateral direction of the base portion 4, and are arranged in plural in the longitudinal direction of the base portion 4.

When the contact portion (contact rib 11) is in contact with the printed circuit board 2, the end portion (distal end portion 7c) of the locking piece (locking claw 7) is in contact with the edge of the mounting hole 2a of the printed circuit board 2 at the 1 st inclined surface 7 d.

According to the above configuration, the distal end portions 7c of the locking claws 7 can be locked to the edge of the mounting hole 2a at the same position by bringing the contact portions (contact ribs 11) into contact with the printed circuit board 2. Therefore, the locking state of the locking claw 7 can be further stabilized.

The 1 st inclined surface 7d is a portion of the tip end portion 7c of the locking piece (locking claw 7) as follows: a portion that abuts against the edge of the mounting hole 2a of the printed circuit board 2 when the locking claw 7 is elastically restored after the locking claw 7 is elastically deformed and inserted into the mounting hole 2a of the printed circuit board 2.

< mounting claw >

As shown in fig. 6, 7, and the like, mounting claws 15 that 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 located 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 4 ba.

The mounting claws 15 are inserted into the mounting holes 2a together with the locking claws 7 when the coil component 1 is mounted on the printed circuit board 2. The attachment claw 15 integrally includes: an inner wall 15a located on the inner side in the longitudinal direction of the base portion 4; a reinforcing wall 15b extending from the inner wall 15 a; and support 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.

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 outside of the base portion 4 in the longitudinal direction. The inner wall 15a and the reinforcing wall 15b extend in the mounting direction by the same amount, and the lengths of the support walls 15c and 15d are shorter than those of the inner wall 15a and the reinforcing wall 15 b.

As described above, the support walls 15c and the support walls 15d are provided at both end portions 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 from each other in this way is to improve the accuracy of molding so that the thickness of the mounting claw 15 after molding is constant by preventing the occurrence of shrinkage at the time of injection molding of the base portion 4.

< anti-collision rib >

The base portion 4 includes a collision prevention rib 10 that can be broken and locked by coming into contact with the edge of the hole (mounting hole 2a) of the printed circuit board 2.

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

The bump ribs 10 can eliminate (reduce as much as possible) the gap between the coil component 1 and the edge of the printed circuit board 2, and can suppress the play of the coil component 1 with respect to the printed circuit board 2 and stabilize the locked state of the base portion 4 with respect to the printed circuit board 2.

The crash rib 10 in the present embodiment is molded from a resin having a lower hardness than the printed circuit board 2. The crush rib 10 is provided with two locations 2 and 8 on both surfaces of each of the two mounting claws 15 so as to protrude in a depth direction (a short side direction (width direction) of the mounting hole 2a as a long hole).

The crush ribs 10 protrude from the outer surfaces of the support walls 15c and 15d of the attachment claw 15 on both sides in the depth direction and extend in the vertical direction.

In particular, as shown in fig. 6, the crush ribs 10 are formed so as to be tapered downward from the center in the vertical direction, and have a width in the longitudinal direction of the base portion 4 that is narrowed.

With this configuration, the load applied to the impact rib 10 from the edge surface of the mounting hole 2a can be gradually increased from the start of insertion of the mounting claw 15 (impact rib 10) into the mounting hole 2 a.

That is, the load at which the crush ribs 10 start to be inserted into the mounting hole 2a can be suppressed to be small, and the locking claws 7 can be smoothly inserted into the mounting hole 2 a.

Further, the crush rib 10 includes at least a portion provided above the lower end of the 1 st inclined surface 7d, and is formed in a wedge shape such that the amount of projection decreases from the center in the vertical direction to the lower side.

By forming the crush ribs 10 in this manner, the load at which the crush ribs 10 start to be inserted into the mounting hole 2a can be suppressed to be smaller, and the locking claws 7 can be smoothly inserted into the mounting hole 2 a.

As shown by the broken line in fig. 7, the crush rib 10 is tapered toward the distal end side in the depth direction, as shown before being pushed in. With such a configuration, the load for breaking the distal end portion of the impact rib 10 can be suppressed to be small.

For example, the impact rib 10 may not be provided, because a gap is not generated between the length of the mounting nail 15 and the length of the mounting hole 2a when the length in the depth direction is completely matched.

However, considering manufacturing errors, it is difficult to manufacture such members in large quantities. Therefore, by using the crash rib 10, the crash rib 10 is broken by the load received from the edge of the mounting hole 2a, and the gap can be eliminated, so that the allowable range of the manufacturing error can be expanded, and the yield can be improved.

In the present embodiment, the description has been given of the structure in which the crush ribs 10 abut on the edge of the mounting hole 2a to which the locking claws 7 are locked, but the present invention is not limited to such a structure. For example, the structure may be configured to abut against an edge of a hole, not shown, formed at a position different from the mounting hole 2 a.

< Metal terminal part >

Next, the metal terminal portions 9X and 9Y around which the end portions of the coil 5 are wound will be described mainly with reference to fig. 8 to 10.

Fig. 8 (a) is a schematic front view showing the metal terminal portion 9Y of the VIII portion of fig. 1, before the end portion of the coil 5 is wound, and fig. 8 (b) is a schematic right side view thereof.

Fig. 9 (a) is a schematic front view showing the metal terminal portion 9Y of the VIII portion of fig. 1, and shows a state after the end portion of the coil 5 is wound, and fig. 9 (b) is a schematic right side view thereof.

Fig. 10 (a) is a schematic front view showing the metal terminal portion 9Y in the VIII portion of fig. 1, and shows a state after the metal terminal portion 9Y and the end portion of the coil 5 are soldered, and 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 portions 9Y of the metal terminal portions 9X and 9Y are illustrated and described as a representative.

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

The metal terminal portions 9X and 9Y are connected to at least some of the plurality of mounting terminals 6W, 6X, 6Y, and 6Z (mounting terminals 6X and 6Y), and can be locally melted by soldering. The metal terminal portions 9X and 9Y of the present embodiment are formed of brass. The metal terminal portions 9X and 9Y are not limited to such a structure, and may be a structure that can be melted and solidified by welding and can be appropriately joined to the end portions of the coil 5.

As shown in fig. 8, at least one of a concave portion 9Yc to which an end portion of the coil 5 is locked and a convex portion not shown is formed in the metal terminal portions 9X and 9Y.

As described above, by locking the end portion of the coil 5 in the concave portion 9Yc (or the convex portion), the winding position of the end portion of the coil 5 can be stabilized before the metal terminal portions 9X and 9Y and the end portion of the coil 5 are welded.

In the present embodiment, the winding portion 13 of the coil 5 includes: metal terminal portions 9X and 9Y; and a protrusion 4d provided adjacent to the metal terminal portions 9X and 9Y, and protruding in an L shape so as to be bent upward from a side of the base portion 4 (base 4b) and to be directed toward the front surface side.

More specifically, metal terminal portion 9X is bent inside upright wall 4c of base portion 4 and is formed integrally with mounting terminal 6X.

The metal terminal portion 9Y is bent inside the standing wall 4c of the base portion 4 to be integrated with the mounting terminal 6Y, and the branched portion is integrated with the mounting terminal 6Z by conducting the capacitor chip 12. With such a configuration, a series resonant circuit can be formed by the coil 5, the capacitor chip 12, and the printed circuit board 2.

By providing the mounting terminals 6Z connected to the metal terminal portions 9Y, the capacitor chip 12 can be mounted on the printed circuit board 2.

The metal terminal portion 9X and the protruding portion 4d are wound with the 2 nd winding portion 5c, and the metal terminal portion 9Y and the protruding portion 4d are wound with the 3 rd winding portion 5e, so that two winding portions 13 are provided. As discussed later, the two wound portions 13 are respectively connected as one body by welding.

The metal terminal portions 9X and 9Y are formed so that the tip side (tip portion 9Yb) is narrower than the base end side (base end portion 9Ya), and a recess portion 9Yc is formed on the tip side (tip portion 9 Yb).

According to the above configuration, the end portion of the coil 5 can be wound with the step 9Yd between the thick base end side (base end portion 9Ya) and the thin tip end side (tip end portion 9Yb), and the end portion of the coil 5 (the middle portion 5eb of the 3 rd winding portion 5e to be described later) can be suppressed from slipping down below (in the mounting direction) where the projection portion 4d is located.

Therefore, the middle portion 5eb of the 3 rd winding portion 5e can be reliably arranged inside the solder ball 9Ye shown in fig. 10 by a predetermined amount, and the bonding strength by soldering can be ensured. Further, it is possible to suppress the occurrence of an excessive play (slack) in the lower portion 5ea of the 3 rd winding portion 5e after welding.

Further, by winding the uppermost end portion of the coil 5 (the upper portion 5ec of the 3 rd wound portion 5e to be discussed later) around the recess 9Yc, the winding position of the uppermost end portion of the coil 5 can be stabilized.

In addition, according to the above configuration, the winding position of the end portion of the coil 5 can be suppressed from being deviated. Therefore, as shown in fig. 10, when the upper portions of the metal terminal portions 9X and 9Y are melted by soldering to form solder balls 9Ye, the end portions of the coil 5 can be sufficiently covered with the solder balls 9Ye, and the bonding strength can be improved. This suppresses disconnection of the end of the coil 5.

More specifically, in the longitudinal direction of the coil component 1, the length of the tip side (tip part 9Yb) of the metal terminal parts 9X and 9Y is formed shorter than the length of the base end side (base end part 9 Ya).

The metal terminal portions 9X and 9Y are formed in plane symmetry with respect to an imaginary central plane including the central axis and extending in the longitudinal direction of the coil component 1.

The protruding portion 4d provided to the base 4b functions as a stopper for melting the metal terminal portions 9X and 9Y, and the upper portion of the protruding portion 4d is warped and functions as a member for restricting upward movement of the lower portion 5ea of the 3 rd winding portion 5 e. The projecting portions 4d are provided adjacent to the metal terminal portions 9X and 9Y, respectively, and are formed integrally with the base 4b made of resin having flame retardancy.

Therefore, even if the heat energy generated by the welding of the metal terminal portions 9X and 9Y is transmitted to the protruding portion 4d, the protruding portion 4d is not melted.

Therefore, as shown in fig. 10, the protrusion 4d prevents the base end portions 9Ya of the metal terminal portions 9Y and the lower portions 5ea of the 3 rd wound portions 5e wound around the base end portions 9Ya, which are located below the upper surface of the protrusion 4d, from being melted.

In this way, the melting of the lower portion 5ea of the 3 rd wound portion 5e can be prevented, and the wound portion of the lower portion 5ea can be left and connected to the base end portion 9Ya with a slight play in the radial direction with respect to the reel of the 3 rd wound portion 5 e.

Therefore, when a pulling force is applied to the 3 rd winding portion 5e, it is possible to slightly displace to suppress an increase in stress and to prevent the end portion of the coil 5 from being broken.

In the present embodiment, the lower portion 5ea of the 3 rd wound portion 5e is wound once around the base end portion 9Ya and the protruding portion 4d of the metal terminal portion 9Y, the middle portion 5eb of the 3 rd wound portion 5e is wound once around the tip end portion 9Yb of the metal terminal portion 9Y, and the upper portion 5ec of the 3 rd wound 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. That is, the number of turns of the 3 rd winding portion 5e at each portion with respect to the protruding portion 4d or the metal terminal portion 9Y can be arbitrarily set.

< coil parts mounting method >

A coil component mounting method according to an embodiment of the present invention will be described. In the coil component mounting method of the present embodiment, the coil component 1 and the printed circuit board 2 are prepared, and the coil component mounting method of the present embodiment includes the steps of: a joining step of joining at least a part of the metal terminal portions 9X and 9Y to an end of the coil 5; an installation step of passing the locking piece (locking claw 7) through the installation 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 mounting step and locking the locking piece to the edge of the mounting hole 2 a.

In the joining step, at least a part 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.

According to the above configuration, the end portion of the coil 5 is locked in the concave portion 9Yc (or a convex portion (not shown)) so that the winding position of the end portion of the coil 5 can be stabilized before the metal terminal portions 9X and 9Y and the end portion of the coil 5 are welded.

The details of the bonding step will be described with reference to fig. 9, as represented by metal terminal portions 9Y of metal terminal portions 9X and 9Y.

First, the operator winds the end of the coil 5 at least once around the protrusion 4d and the base end 9Ya of the metal terminal portion 9Y above the base 4b so as to bind the protrusion 4d and the base end 9Ya of the metal terminal portion 9Y, thereby forming the lower portion 5ea of the 3 rd wound portion 5 e.

Next, the operator winds the end portion of the coil 5 at least once around the tip end portion 9Yb so as to hook on the step 9Yd, thereby forming the middle portion 5eb of the 3 rd wound portion 5 e.

Finally, the operator winds the end of the coil 5 at least once around the tip end portion 9Yb so as to be hooked on the concave portion 9Yc, thereby forming the upper portion 5ec of the 3 rd wound portion 5 e.

In this manner, the coil 5 is wound to form the 3 rd wound portion 5 e. In the 3 rd winding portion 5e thus formed, the upper surface of the base 4b can restrict downward movement of the lower portion 5ea of the 3 rd winding portion 5e, and the lower surface of the portion of the projection 4d protruding toward the front side can restrict upward movement of the lower portion 5 ea.

The step 9Yd can restrict downward movement of the middle portion 5eb of the 3 rd wound portion 5e, and the recess 9Yc can restrict upward and downward movement of the upper portion 5ec of the 3 rd wound portion 5 e.

By winding the 3 rd winding portion 5e around the metal terminal portion 9Y in this manner, the state of the winding portion 13 can be stabilized in the stage before the welding.

As described above, since the movement in the vertical direction of the lower portion 5ea of the 3 rd 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 projection portion 4d protruding toward the front side, it is possible to suppress the displacement due to vibration even in portions other than the welded portion.

Mounting position for electric element

Next, a mounting portion of an electric component (for example, the capacitor chip 12 described above) will be described with reference to fig. 11 to 16.

Fig. 11 is an enlarged perspective view showing the periphery of the pad 16a on which the capacitor chip 12 is mounted, and fig. 12 is a perspective view showing a state in which the capacitor chip 12 is mounted on the pad 16 a.

Fig. 13 is a perspective view showing the lead frame 16(16X, 16Y, 16Z) and the capacitor chip 12 mounted to a part (pad 16a) of the lead frames 16Y and 16Z.

Fig. 14 (a) is a schematic front view showing the periphery of the pad 16a before the capacitor chip 12 is mounted, and fig. 14 (b) is a schematic front view showing the periphery of the pad 16a after the capacitor chip 12 is mounted.

Fig. 15 (a) is a schematic front view showing an example in which a through hole 400e is formed in a position inside the edge of the pair of opposing lands 16a in the 1 st direction. Fig. 15 (b) is a schematic front view showing an example in which a through hole 400f is formed at a position inside the capacitor chip 12 in the 2 nd direction.

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

In fig. 14 and 15 and fig. 16 to be discussed later, the base portion 4 in the vicinity of the through holes 4e, 4f, 400e, and 400f is simplified and shown in a square shape.

In fig. 14 (b), 15, and 16, the capacitor chip 12 (and the chip resistor 18) is shown in a virtual manner by a two-dot chain line and hatching.

As shown in fig. 12 and 13, electrical components, such as the capacitor chip 12 and a chip resistor 18 discussed later, are electrically and physically connected with the pads 16a (16c) shown in fig. 13 as part of the lead frames 16Y, 16Z using solder 17.

When an electrical component is soldered to the pad 16a (16c) by reflow soldering, a solder ball 17a as a foreign substance may be unexpectedly generated in the capacitor chip 12 as shown in fig. 15.

In order to prevent the generation of the solder ball 17a, the following measures are generally implemented: (1) adjusting temperature conditions during reflow soldering; (2) adjustment of the solder paste application conditions (application amount); (3) reconsideration of the material or coating shape of the solder paste; (4) reconsideration of pad size, etc.

In addition, in the case where the coil component 1 is exposed to an environment where vibration occurs, such as the case where the coil component 1 is transported or the case where the coil component 1 is mounted in a vehicle, an inspection and removal process for removing the solder ball 17a is particularly required, and improvement thereof has been demanded. In particular, it is necessary to suppress the generation of the solder ball 17a not for the electric element constituting the integrated circuit but for the surface mounting type electric element.

The coil component 1 of the present embodiment includes: an electric element (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 bonded by solder 17.

A part of the lead frame 16 is disposed inside the base portion 4, and the pair of pads 16a are exposed to the outside from the base portion 4.

Further, in the base portion 4, a hole (through hole 4e) is formed between the pair of pads 16a at a position overlapping with the capacitor chip 12 bonded to the pads 16 a.

As the "electric element", a chip resistor 18 and the like discussed later are included in addition to the capacitor chip 12.

The "hole" formed in the base portion 4 may be a hole capable of widening the space around the capacitor chip 12. In other words, the base portion 4 and the capacitor chip 12 need only be prevented from coming close to each other, and the through hole 4e is not limited thereto, and may be a hole with a bottom.

That is, a portion of the base portion 4 facing the capacitor chip 12 may be a recess having a thin wall with respect to the periphery.

In addition, the "position overlapping the capacitor chip 12" is strictly speaking a position overlapping the capacitor chip 12 as viewed from a direction perpendicular to the pair of pads 16 a.

According to the above configuration, the formation of the hole can suppress the solder 17 melted during reflow from remaining in the portion of the capacitor chip 12 between the pair of lands 16a, and the solder 17 is likely to aggregate to the lands 16 a. Therefore, the solder ball 17a can be prevented from being generated at a portion of the capacitor chip 12 facing the hole (through hole 4 e).

Further, since the hole is the through hole 4e, aggregation of the solder 17 to the pad 16a can be further promoted at the time of reflow soldering, and generation of the solder ball 17a can be further suppressed.

The base portion 4 of the present embodiment is insert-molded so as to include the lead frame 16 shown in fig. 13 therein.

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 16 a; and a lead frame 16Z having a pad 16a paired with one pad 16 a.

Specifically, the lead frame 16 of the present embodiment is formed of phosphor bronze, and is formed by punching a plate material having a thickness of 0.3mm by a press and plating tin on the entire surface.

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

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

Further, the base portion 4 of the present embodiment is formed with 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 protrude from both the vertical sides of the through hole 4e toward the center side. Incidentally, the through-hole 4e of the present embodiment is formed at the time of resin molding.

The edge 4g of the hole (through hole 4e) is formed so as to overlap the edges 16b of the pair of pads 16a on the opposite sides to each other, or, as shown in fig. 14, so as to be located outside the edges 16b on the opposite sides.

Here, "formed to the outer side than the edge 16b on the opposite side" means that the edge 16b on the opposite side is formed to the outer side (upper side and lower side in the present embodiment) than the edge 16b on the opposite side in the direction (1 st direction shown in fig. 14) orthogonal to the edge 16b on the opposite side with respect to the pair of pads 16 a. The "outer side" is the side when the space between the pair of pads 16a is set as the inner side, i.e., the outer side.

That is, the state is as follows: in the above direction, the edge of the space on the side opposite to the capacitor chip 12 is divided by the edge 16b of the pad 16 a. With this configuration, the solder 17 is also condensed on the end surfaces of the pair of lands 16a facing each other.

The structure shown in fig. 15 (a) as a comparative example is as follows: the edge 400g of the hole (through hole 400e) is formed inward of the edges 16b of the pair of pads 16a on the opposite side to each other. In this structure, the solder 17 may remain as it adheres to the edge 400g of the through hole 400e during reflow soldering, and the remaining solder 17 may form a solder ball 17 a.

On the other hand, according to the above-described configuration shown in fig. 14 (b), since the edge 4g of the through hole 4e is not formed inside the condensation portion of the land 16a, the solder 17 is less likely to remain on the edge 4g during reflow soldering. Therefore, the solder ball 17a can be prevented from being generated at the edge 4g of the through hole 4e intersecting the above-described direction (1 st direction to be described later).

In the plane of the pair of pads 16a on which the power feeding element (capacitor chip 12) is mounted, a direction connecting the pair of pads 16a is defined as a 1 st direction, and a direction perpendicular to the 1 st direction is defined as a 2 nd direction. At this time, the hole (through hole 4e) shown in fig. 14 (b) is formed to be wider in the 2 nd direction than the capacitor chip 12 as viewed from the direction perpendicular to the plane.

That is, the state is as follows: in the 2 nd direction, the edge of the space on the side opposite to the capacitor chip 12 is divided by the edge 16b of the pad 16 a.

The structure shown in fig. 15 (b) as a comparative example is as follows: the hole (through hole 400f) is formed at the same position as the capacitor chip 12 in the 2 nd direction or at a position inside the capacitor chip 12. In this structure, the solder 17 may remain as it adheres to the edge 400h of the through hole 400f during reflow soldering, and the remaining solder 17 may form a solder ball 17 a.

On the other hand, according to the above-described configuration shown in fig. 14 (b), the edge 4h is formed to be wider than the capacitor chip 12 to make it difficult for the solder 17 to remain. Therefore, the solder ball 17a can be prevented from being generated between the capacitor chip 12 and the edge 4h of the through hole 4e intersecting the 2 nd direction.

In the structure shown in fig. 16, a plurality of electric elements (the capacitor chip 12 and the chip resistor 18) are provided. The pads 16a, 16c provided to the pattern (lead frame 16) are provided in a plurality of pairs corresponding to the terminals 12a, 18a of the electric element (capacitor chip 12 and chip resistor 18).

The hole (through hole 4f) extends so as to extend between the pairs of pads 16a and 18 a.

The electrical elements in the present embodiment are only both the capacitor chip 12 and the chip resistor 18, but a plurality of electrical elements may be provided.

According to the above configuration, the generation of the solder ball 17a in the portion of the base portion 4 facing the plurality of electric elements can be suppressed by the hole (through hole 4f) extending between the plurality of pairs of pads 16a and 18 a.

The above-described embodiment and modification include the following technical ideas.

(1) A coil component to be mounted on a printed board having a mounting hole formed in a thickness direction,

the coil component includes:

a core;

a coil wound around the core;

a base portion for holding the core; and

a plurality of mounting terminals at least a part of which is capable of conducting with the coil and the printed circuit board, the plurality of mounting terminals being held by the base portion,

the base portion has an elastically deformable locking piece,

the locking piece can pass through the mounting hole through elastic deformation and can be locked on the edge of the mounting hole through elastic restoration.

(2) The coil component according to (1), wherein,

the locking piece extends in the same direction as the extending direction of the mounting terminal, and the extending direction is the mounting direction in which the locking piece is mounted on the printed circuit board.

(3) The coil component according to (1) or (2), wherein,

the base portion has an elastically deformable holding piece for holding the core,

the holding piece holds the core in an elastically deformed state.

(4) The coil component according to any one of (1) to (3),

the base part is formed lengthwise and is provided with a plurality of ribs,

the pair of locking pieces is provided at both ends of the base portion in the longitudinal direction.

(5) The coil component according to any one of (1) to (4),

the base part is formed lengthwise and is provided with a plurality of ribs,

the locking piece protrudes outward in the longitudinal direction of the base portion from a position on the upper side of the central portion at the end portion of the base portion, and extends in a curved manner so as to face a mounting direction in which the printed circuit board is mounted.

(6) The coil component according to any one of (1) to (5),

the end of the locking piece has:

a 1 st inclined surface inclined so as to be directed toward a side where the elastic recovery is directed toward a tip end side;

and a 2 nd inclined surface provided closer to the distal end side than the 1 st inclined surface and inclined so as to be elastically deformed toward the distal end side.

(7) The coil component according to any one of (1) to (6),

the core is formed lengthwise, has a flat sectional shape including long sides and short sides in a section perpendicular to the lengthwise direction,

the core is supported by the base portion in a state in which the long side is upright in a mounting direction in which the printed circuit board is mounted.

(8) The coil component according to any one of (1) to (7),

the base portion has a metal terminal portion around which an end portion of the coil is wound,

the metal terminal portion is connected to at least a part of the plurality of mounting terminals, and a part of the metal terminal portion can be melted by welding,

at least one of a concave portion and a convex portion to which an end portion of the coil is locked is formed in the metal terminal portion.

(9) The coil component according to (8), wherein,

the tip end side of the metal terminal portion is formed to be narrower than the base end side,

the concave portion is formed on the tip end side.

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

the coil component further includes:

an electric element having a pair of terminals;

and a pattern having conductivity,

the pattern has a pair of lands to which the pair of terminals of the electric component are bonded with solder,

a part of the pattern is provided inside the base part,

the pair of pads are exposed to the outside from the base portion,

in the base portion, a hole is formed between the pair of pads at a position overlapping with the electronic component bonded to the pads.

(11) The coil component according to (10), wherein,

the edge of the hole is formed to overlap with or to be located outside the edge on the opposite side of each of the pair of pads.

(12) The coil component according to (10) or (11), wherein,

in the plane of the pair of pads on which the electric component is mounted, when the direction connecting the pair of pads is the 1 st direction and the direction perpendicular to the 1 st direction is the 2 nd direction,

the hole is formed wider than the electric element in the 2 nd direction as viewed from a direction perpendicular to the plane to a position outside the electric element.

(13) The coil component according to any one of (10) to (12), wherein,

the electric element is provided in a plurality of numbers,

the pads provided to the pattern are provided with a plurality of pairs corresponding to the terminals of the electric element,

the hole extends in a manner spanning between pairs of the pads.

(14) An electrical apparatus with a coil component, wherein,

the electric device with the coil component comprises:

(1) the coil component according to any one of (1) to (13);

and the printed substrate.

(15) The electric apparatus with a coil component according to (14), wherein,

the base portion includes a collision prevention rib that is broken by contact with an edge of the hole of the printed circuit board and can be locked to the edge of the hole of the printed circuit board,

the collision prevention rib is locked to the edge of the hole of the printed circuit board in a direction different from the locking direction of the locking piece.

(16) An electrical apparatus with a coil component, wherein,

the electric device with the coil component comprises:

(6) the coil parts;

and a printed circuit board for mounting the printed circuit board,

the coil component has an abutting portion that abuts the printed board when the coil component is mounted on the printed board,

when the abutting portion abuts against the printed circuit board, an end portion of the locking piece abuts against an edge of the mounting hole of the printed circuit board at the 1 st inclined surface.

(17) A coil component mounting method, wherein,

the coil component mounting method is a method for preparing the coil component and the printed circuit board described in (8) or (9), and includes:

a bonding step of bonding at least a part of the metal terminal portion to an end portion of the coil;

an installation step of causing the locking piece to pass through the installation hole by elastically deforming the locking piece; and

a locking step of elastically restoring the locking piece after the mounting step to lock the locking piece to the edge of the mounting hole,

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 locked to the metal terminal portion.

(18) The coil component according to (4), wherein,

the pair of locking pieces are configured to be elastically deformed and elastically restored in opposite directions to each other so as to be able to be locked to the edge of the mounting hole.

(19) The coil component according to (6), wherein,

the locking piece is provided with an extending part extending in the mounting direction of the locking piece to the printed circuit board at a position closer to the base end side than the 1 st inclined surface,

the 2 nd inclined surface extends toward the side of elastic deformation with respect to the extending portion.

(20) A coil component, characterized in that,

the coil component includes: a core; a coil wound around the core; a base portion for holding the core; and a plurality of mounting terminals for mounting to the printed circuit board,

the base portion has a metal terminal portion around which an end portion of the coil is wound,

the metal terminal portion is connected to at least a part of the plurality of mounting terminals, a part of the metal terminal portion is melted by soldering,

at least one of a concave portion and a convex portion for locking an end portion of the coil is formed in the metal terminal portion.

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

the coil component includes:

a core;

a coil wound around the core;

a base portion for holding the core;

an electric element having a pair of terminals; and

a pattern having a conductivity,

the pattern has a pair of lands to which the pair of terminals of the electric component are bonded with solder,

a part of the pattern is provided inside the base part,

the pair of pads are exposed to the outside from the base portion,

in the base portion, a hole is formed between the pair of pads at a position overlapping with the electronic component bonded to the pads.

The present application claims priority based on japanese application (japanese patent application No. 2019-122994) filed on 7/1/2019, the disclosure of which is incorporated herein in its entirety.

Description of the reference numerals

1X, an antenna device (an electrical apparatus with a coil component); 1. a coil component; 2. a printed substrate; 2a, mounting holes; 2b, a through hole; 3. a core; 3a, long side; 3b, short side; 4. a base part; 4a, a coil framework; 4b, a base; 4ba and a bottom plate; 4bb, support ribs; 4bc, side walls; 4bd, rod; 4c, standing the wall; 4ca, a bridge; 4d, a protrusion; 4e, 4f, through-holes (holes); 4g, 4h, edge; 5. a coil; 5a, the 1 st winding part; 5b, the 1 st path part; 5c, the 2 nd winding part; 5d, 2 nd path part; 5e, the 3 rd winding part; 5ea, lower part; 5eb, middle; 5ec, upper part; 6W, 6X, 6Y, 6Z, mounting terminals; 7. a locking claw (locking piece); 7a, a protrusion; 7b, an extension; 7c, a tip end portion; 7d, the 1 st inclined surface; 7e, the 2 nd inclined plane; 7f, a topmost end portion; 8X, 8Y, holding claws (holding pieces); 8Xa, basal end; 8Xb, an extension; 8Xc, tip portion; 9X, 9Y, metal terminal portions; 9Ya, basal end; 9Yb, top end portion; 9Yc, concave; 9Yd, step; 9Ye, solder ball; 10. an anti-collision rib; 11. an abutting rib (abutting portion); 12. a capacitor chip (electric element); 12a, a terminal; 13. a winding section; 14. an insulating tape; 15. mounting claws; 15a, an inner wall; 15b, a reinforcing wall; 15c, 15d, support walls; 16. 16X, 16Y, 16Z, lead frame (pattern); 16a, 16c, pads; 16b, a rim; 17. soldering tin; 17a, solder balls; 18. chip resistors (electrical components); 18a, a terminal; 400e, 400f, through holes; 400g, 400h and edge.

Claims (17)

1. A coil component to be mounted on a printed board having a mounting hole formed in a thickness direction,

the coil component includes:

a core;

a coil wound around the core;

a base portion for holding the core; and

a plurality of mounting terminals at least a part of which is capable of conducting with the coil and the printed circuit board, the plurality of mounting terminals being held by the base portion,

the base portion has an elastically deformable locking piece,

the locking piece can pass through the mounting hole through elastic deformation and can be locked on the edge of the mounting hole through elastic restoration.

2. The coil component of claim 1,

the locking piece extends in the same direction as the extending direction of the mounting terminal, and the extending direction is the mounting direction in which the locking piece is mounted on the printed circuit board.

3. The coil component according to claim 1 or 2,

the base portion has an elastically deformable holding piece for holding the core,

the holding piece holds the core in an elastically deformed state.

4. The coil component according to any one of claims 1 to 3,

the base part is formed lengthwise and is provided with a plurality of ribs,

the pair of locking pieces is provided at both ends of the base portion in the longitudinal direction.

5. The coil component according to any one of claims 1 to 4,

the base part is formed lengthwise and is provided with a plurality of ribs,

the locking piece protrudes outward in the longitudinal direction of the base portion from a position on the upper side of the central portion at the end portion of the base portion, and extends in a curved manner so as to face a mounting direction in which the printed circuit board is mounted.

6. The coil component according to any one of claims 1 to 5,

the end of the locking piece has:

a 1 st inclined surface inclined so as to be directed toward a side where the elastic recovery is directed toward a tip end side; and

and a 2 nd inclined surface provided closer to the distal end side than the 1 st inclined surface and inclined so as to be elastically deformed toward the distal end side.

7. The coil component according to any one of claims 1 to 6,

the core is formed lengthwise, has a flat sectional shape including long sides and short sides in a section perpendicular to the lengthwise direction,

the core is supported by the base portion in a state in which the long side is upright in a mounting direction in which the printed circuit board is mounted.

8. The coil component according to any one of claims 1 to 7,

the base portion has a metal terminal portion around which an end portion of the coil is wound,

the metal terminal portion is connected to at least a part of the plurality of mounting terminals, and a part of the metal terminal portion can be melted by welding,

at least one of a concave portion and a convex portion to which an end portion of the coil is locked is formed in the metal terminal portion.

9. The coil component of claim 8,

the tip end side of the metal terminal portion is formed to be narrower than the base end side,

the concave portion is formed on the tip end side.

10. The coil component according to any one of claims 1 to 9,

the coil component further includes:

an electric element having a pair of terminals; and

a pattern having a conductivity,

the pattern has a pair of lands to which the pair of terminals of the electric component are bonded with solder,

a part of the pattern is provided inside the base part,

the pair of pads are exposed to the outside from the base portion,

in the base portion, a hole is formed between the pair of pads at a position overlapping with the electronic component bonded to the pads.

11. The coil component of claim 10,

the edge of the hole is formed to overlap with or to be located outside the edge on the opposite side of each of the pair of pads.

12. The coil component of claim 10 or 11,

in the plane of the pair of pads on which the electric component is mounted, when the direction connecting the pair of pads is the 1 st direction and the direction perpendicular to the 1 st direction is the 2 nd direction,

the hole is formed wider than the electric element in the 2 nd direction as viewed from a direction perpendicular to the plane to a position outside the electric element.

13. The coil component according to any one of claims 10 to 12,

the electric element is provided in a plurality of numbers,

the pads provided to the pattern are provided with a plurality of pairs corresponding to the terminals of the electric element,

the hole extends in a manner spanning between pairs of the pads.

14. An electrical apparatus with a coil component, wherein,

the electric device with the coil component comprises:

a coil part as set forth in any one of claims 1 to 13; and

the printed substrate.

15. The electrical apparatus with coil component of claim 14,

the base portion includes a collision prevention rib that is broken by contact with an edge of the hole of the printed circuit board and can be locked to the edge of the hole of the printed circuit board,

the collision prevention rib is locked to the edge of the hole of the printed circuit board in a direction different from the locking direction of the locking piece.

16. An electrical apparatus with a coil component, wherein,

the electric device with the coil component comprises:

the coil component of claim 6; and

the printed circuit board is provided with a plurality of printed circuit boards,

the coil component has an abutting portion that abuts the printed board when the coil component is mounted on the printed board,

when the abutting portion abuts against the printed circuit board, an end portion of the locking piece abuts against an edge of the mounting hole of the printed circuit board at the 1 st inclined surface.

17. A coil component mounting method, wherein,

the coil component mounting method, in which the coil component according to claim 8 or 9 and the printed circuit board are prepared, includes:

a bonding step of bonding at least a part of the metal terminal portion to an end portion of the coil;

an installation step of causing the locking piece to pass through the installation hole by elastically deforming the locking piece; and

a locking step of elastically restoring the locking piece after the mounting step to lock the locking piece to the edge of the mounting hole,

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 locked to the metal terminal portion.

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