JPWO2012053089A1 - Coil parts and coil part units - Google Patents

Abstract

A metal body is placed close to the rear of the coil so as to increase sensitivity in front of the coil having antenna directivity in the front-rear direction, and the coil and the metal body are held on the bobbin case. The bobbin case has a substrate mounting surface that is a surface that is fixed to the substrate surface of the electronic device and that is parallel or substantially parallel to the antenna directivity direction of the front panel. When mounted on a substrate surface of an electronic device, a sensitivity region extending in a direction parallel to the substrate surface and extending in one direction with high sensitivity can be formed.

Description

  The present invention relates to a coil component and a coil component unit, and more particularly to a coil component and a coil component unit capable of forming a sensitivity region extending in a direction parallel to a substrate surface of an electronic device and in one direction with high sensitivity.

  Conventionally, a coil having antenna directivity in the front-rear direction, a coil housing space that is a space for housing the coil, and a surface that is fixed to the board surface of the electronic device and that is orthogonal to the direction of the antenna directivity of the coil A coil component comprising a bobbin case having a certain board mounting surface is known (for example, see Patent Document 1).

JP 2010-021458 A

This type of coil component is mounted on an electronic device by fixing the substrate mounting surface of the bobbin case to the substrate surface of the electronic device. However, in the conventional coil component described above, the substrate mounting surface is in the direction of the antenna directivity of the coil. Since the surfaces are orthogonal, the sensitivity region of the coil component extends in a direction orthogonal to the substrate surface of the electronic device.
By the way, when the electronic device is, for example, a digital camera, the substrate surface generally spreads in the vertical and horizontal directions of the digital camera. For this reason, the sensitivity region of the coil component is in a state extending in the front-rear direction of the digital camera. Therefore, for example, when a digital camera is placed on the cradle in order to perform close proximity communication with an antenna that is built in the cradle and has antenna directivity in the vertical direction, the digital camera is placed on the cradle and the sensitivity of the coil component is set. The region also needed to be extended in the vertical direction.
However, there was a strong demand to place the digital camera on the cradle without standing.
Accordingly, an object of the present invention is to provide a coil component and a coil component unit capable of forming a sensitivity region extending in a direction parallel to the substrate surface of the electronic device and in one direction with high sensitivity.

In a first aspect, the present invention provides a coil having antenna directivity in the front-rear direction, a metal body installed close to the rear of the coil so as to increase sensitivity in front of the coil, and a space for housing the coil. A coil housing space, a metal body housing space that is a space for housing the metal body, and a surface that is fixed to the substrate surface of the electronic device and that is parallel to or substantially parallel to the direction of the antenna directivity of the coil. There is provided a coil component comprising a bobbin case having a certain board mounting surface.
In the coil component having the above configuration, the magnetic field and the electric field in front of the coil are increased by electrically connecting one end of the coil and the metal body to the ground of the substrate of the electronic device. Further, the board mounting surface is a surface parallel or substantially parallel to the direction of the antenna directivity of the coil. As a result, when mounted on the electronic device by fixing the substrate mounting surface to the substrate surface of the electronic device, it extends in a direction parallel to or substantially parallel to the substrate surface of the electronic device and in one direction from the coil component with high sensitivity. A sensitive area can be formed.
And when the electronic device is a digital camera, for example, and its substrate surface extends in the vertical and horizontal directions of the digital camera, the sensitivity area of the coil component extends with high sensitivity downward in the digital camera. I can do it. Therefore, for example, when a digital camera is placed on the cradle in order to perform near field communication with an antenna built in the cradle and having antenna directivity in the vertical direction, the digital camera can be placed in a standing state.

  If the metal body has, for example, a planar shape, there is almost no change in characteristics due to thickness. For example, even if a metal foil is attached to a plastic sheet and the foil side is the coil side, Alternatively, a metal plate having such a thickness that the plane shape can be maintained autonomously may be used, or a metal plate having ribs at both ends may be used in order to give strength. Examples of the metal include copper and aluminum.

  As the metal body is separated from the coil as the distance from the coil increases, it is desirable that the metal body is not so far away from the coil. As long as it is insulated from the coil, it may be disposed in contact with the coil. The coupling strength refers to the S21 characteristic (S parameter), which is one of the antenna characteristic evaluations, and is another coil facing the receiving antenna (approximately 10 mm apart) from the transmitting antenna (coil of the coil component). ) Is an index for evaluating the transmission characteristics. When transmission is possible from the transmitting antenna to the receiving antenna without any loss, the coupling strength is 0 dB, and the coupling strength decreases as the transmission loss increases.

  It is desirable to provide coil position restricting means for holding the position of the coil with respect to the bobbin case in the coil housing space.

  The metal body accommodating space can be formed, for example, by providing a slit in the bobbin case, and also serves to determine the position (distance) of the metal body relative to the coil while accommodating and fixing the metal body in the bobbin case.

In a second aspect, the present invention provides the coil component according to the first aspect, wherein the winding portion of the coil and the metal body are in a positional relationship in which the coil and the metal body are held in the bobbin case. A coil component having a size and a positional relationship such that a projection image of the coil winding portion can be completely inserted into the front surface of the metal body when the coil winding portion is projected on the front surface of the body. provide.
In the coil component having the above-described configuration, the degree of freedom of the size of the front surface of the metal body is greater than the winding portion of the coil whose size is almost defined by the frequency band. When the metal body is arranged close to the coil in such a size and positional relationship that the projected image of the winding portion of the coil just enters the front surface of the metal body, it is about -7.6 dB compared to the case where the metal body is not provided. The coupling strength was improved and the function of the coil as an antenna could be sufficiently enhanced. Further, when the front surface of the metal body is made larger than that, the characteristics are further improved, but the occupied space becomes larger. Therefore, it is preferable to appropriately select the size of the front surface of the metal body in accordance with the internal space size of the electronic device using the coil component and the characteristics required by the electronic device.

In a third aspect, the present invention provides the coil component according to the first or second aspect, wherein both end portions of the coil are exposed to a board mounting surface of the bobbin case to become coil terminal portions, and at least the metal body A part is exposed to the board mounting surface of the bobbin case to become a metal body terminal part, and a metal bobbin fixing terminal part is installed in at least one place on the board mounting surface of the bobbin case. Coil parts to be provided are provided.
With the configuration described above, the coil terminal portion, the metal body terminal portion, and the bobbin fixing terminal portion can be electrically and mechanically connected to the substrate surface of the electronic device by solder reflow.

In a fourth aspect, the present invention provides the coil component according to the third aspect, wherein both ends of the coil are processed into a flat plate shape, wound around the board mounting surface side end of the bobbin case, and exposed to the board mounting surface. A coil component is provided in which a portion of the insulating coating is removed and solder plating is performed to form a coil terminal portion.
With the above configuration, both ends of the coil can be fixed to the bobbin case. Further, by using both end portions of the coil as terminals, it is possible to eliminate another terminal component. Furthermore, the portion exposed to the board mounting surface can be soldered to the board surface of the electronic device by solder reflow.

In a fifth aspect, the present invention provides the coil component according to any one of the first to fourth aspects, wherein the bobbin case has an adsorption surface that can be adsorbed by a mounter on the side opposite to the substrate mounting surface. Coil parts to be provided are provided.
With the above configuration, the automatic mounting suction mounter can be used when the coil component is mounted on the substrate of the electronic device.

In a sixth aspect, the present invention comprises a coil component and a flexible printed circuit board in which the coil component is fixed to the front surface. The coil component includes a coil having antenna directivity in the front-rear direction; A bobbin having a coil housing space which is a space for housing a coil and a board mounting surface which is a surface fixed to the front surface of the flexible printed circuit board and which is a surface orthogonal to or substantially orthogonal to the direction of antenna directivity of the coil A flexible printed circuit board, wherein the flexible printed circuit board has a coil component region to which the coil component is fixed, a bending region that can be folded so as to be orthogonal or substantially orthogonal to the coil component region, and sensitivity in front of the coil. A coil component unit comprising: a metal layer disposed behind the coil so as to be enhanced.
In the coil component unit configured as described above, if the bent region of the flexible printed circuit board is fixed to the substrate of the electronic device in a state of being orthogonally or substantially orthogonal to the coil component region, it is parallel or substantially parallel to the substrate surface of the electronic device. Coil sensitivity can be extended in any direction. Then, by electrically connecting one end of the coil and the metal layer to the ground of the substrate of the electronic device, a magnetic field and an electric field in front of the coil are increased. As a result, it is possible to form a sensitivity region extending with high sensitivity in one direction from the coil component in a direction parallel or substantially parallel to the substrate surface of the electronic device.
And when the electronic device is a digital camera, for example, and its substrate surface extends in the vertical and horizontal directions of the digital camera, the sensitivity area of the coil component extends with high sensitivity downward in the digital camera. I can do it. Therefore, for example, when a digital camera is placed on the cradle in order to perform near field communication with an antenna built in the cradle and having antenna directivity in the vertical direction, the digital camera can be placed in a standing state.

  According to the coil component and the coil component unit of the present invention, it is possible to form a sensitivity region extending with high sensitivity in one direction from the coil component in a direction parallel or substantially parallel to the substrate surface of the electronic device.

It is (a) top view, (b) front view, (c) right side view, and (d) bottom view showing the coil component according to the first embodiment. 1 is a perspective view showing a coil component according to Embodiment 1. FIG. 1 is an exploded perspective view showing a coil component according to Embodiment 1. FIG. It is the (a) front view and (b) right view which show the coil which concerns on Example 1. FIG. It is the (a) front view which shows the metal body which concerns on Example 1, (b) The right view, and (c) The bottom view. It is a front view which shows the projection image of the coil | winding part of the coil to the front surface of the metal body which concerns on Example 1. FIG. It is the (a) top view which shows the bobbin case concerning Example 1, (b) front view, (c) right side view, and (d) bottom view. 1 is a perspective view showing a bobbin case according to a first embodiment. BRIEF DESCRIPTION OF THE DRAWINGS (a) Front view, (b) Right side view, and (c) Bottom view showing a digital camera mounted with coil components according to Embodiment 1. It is a right view which shows the digital camera and cradle which mounted the coil components which concern on Example 1. FIG. It is the (a) chart and (b) graph which show the gap distance ratio characteristic of the coil components which concern on Example 1. FIG. It is the (a) chart and (b) graph which show the area ratio characteristic of the coil components which concern on Example 1. FIG. It is the (a) front view, (b) right view, and (c) bottom view which show the coil components which concern on Example 2. FIG. It is (a) top view, (b) front view, (c) right side view, and (d) bottom view showing a coil component according to a third embodiment. It is the (a) front view which shows the metal body which concerns on Example 3, (b) The right view, and (c) The bottom view. It is (a) top view, (b) front view, (c) right side view, and (d) bottom view showing a coil component according to Example 4. It is the (a) front view and the (b) right view which show the coil component unit which concerns on Example 5. FIG. It is (a) top view, (b) front view, (c) right side view, (d) bottom view, and (e) back view showing a coil component according to a fifth embodiment. It is (a) top view, (b) front view, (c) right side view, (d) bottom view, and (e) back view showing a bobbin case according to a fifth embodiment. It is the (a) front view which shows the flexible printed circuit board concerning Example 5, (b) The right view and (c) The rear view. It is a front view which shows the projection image of the coil | winding part of the coil to the metal layer which concerns on Example 5. FIG. (A) Front view, (b) Right side view, and (c) Bottom view showing a digital camera mounted with a coil component unit according to a fifth embodiment. It is a right view which shows the digital camera and cradle which mounted the coil component unit which concerns on Example 5. FIG. It is (a) top view, (b) front view, (c) right side view, (d) bottom view, and (e) back view showing a coil component according to Example 6.

  Hereinafter, the present invention will be described in more detail with reference to embodiments shown in the drawings. Note that the present invention is not limited thereby.

Example 1
1A is a plan view showing the coil component 10 according to the first embodiment, FIG. 1B is a front view, FIG. 1C is a right side view, and FIG. 1D is a bottom view.
The coil component 10 includes a coil 1, a metal body 2 installed close to the rear of the coil 1, and a bobbin case 3 that holds the coil 1 and the metal body 2.
The bottom surface of the bobbin case 3 is a board mounting surface fixed to the board surface of the electronic device.

FIG. 2 is a perspective view of the coil component 10.
FIG. 3 is an exploded perspective view of the coil component 10.

4A is a front view of the coil 1, and FIG. 4B is a right side view thereof.
The coil 1 is a U-shaped coil having windings 1a and 1b obtained by winding an insulation-coated copper wire in a solenoid shape. The central axis 1c of the winding 1a and the central axis 1d of the winding 1b are parallel.
Both end portions of the coil 1 are bent so as to be processed into a flat plate shape and wound around the end portion of the bobbin case 3 to form coil terminal portions 1e and 1f. The insulation coating on at least the bottom surface of the coil terminal portions 1e and 1f is removed and solder plated. As can be seen from FIG. 1D, the coil terminal portions 1e and 1f are exposed on the board mounting surface.
As shown in FIG. 4B, the coil 1 has antenna directivity in the front-rear direction, and the front sensitivity region F and the rear sensitivity region R are the main sensitivity regions. As can be seen from FIG. 1, the board mounting surface is a surface parallel or substantially parallel to the direction of the antenna directivity of the coil 1.

5A is a front view of the metal body 2, FIG. 5B is a right side view, and FIG. 5C is a bottom view.
The metal body 2 is a copper metal plate, and part of the lower end is bent into an L shape to form metal body terminal portions 2a and 2b. As can be seen from FIG. 1D, the metal terminal portions 2a and 2b are exposed on the board mounting surface.

As shown in FIG. 6, when the portions of the windings 1 a and 1 b of the coil 1 are projected from the front side on the front surface of the metal body 2 in a positional relationship where the coil 1 and the metal body 2 are held in the bobbin case 3, The size and position of the metal body 2 are set so that the projected image 1p of the portions of the windings 1a and 1b can enter the front surface of the metal body 2. The size of the coil 1 is defined by the frequency band.
As a numerical example, when the frequency band is the GHz band, the length La of the windings 1a and 1b of the coil 1 is about 3.2 mm, and the width Lb of the coil 1 is about 5 mm. Further, the height Ca of the front surface of the metal body 2 is about 3.2 mm to about 8 mm, and the width Cb is about 5 mm to about the internal space size of the electronic device using the coil component 10 and the characteristics required by the electronic device. A value between about 8 mm is selected.

7A is a plan view of the bobbin case 3, FIG. 7B is a front view, FIG. 7C is a right side view, and FIG. 7D is a bottom view.
The bobbin case 3 is made of synthetic resin and has a coil housing space 3g that is a space for housing the coil 1 and a metal body housing space 3h that is a space for housing the metal body 2.
The coil housing space 3g is provided with projections 3d and 3e inserted into the windings 1a and 1b of the coil 1 in order to maintain the position of the coil 1 with respect to the bobbin case 3.

As shown in FIG. 7D, a part of the metal plate embedded in the bobbin case 3 is exposed on the board mounting surface to form bobbin fixing terminal portions 3a to 3c.
As shown in FIG. 7A, the bobbin case 3 includes an adsorption surface 3f that can be adsorbed by a mounter on the side opposite to the substrate mounting surface.

  FIG. 8 is a perspective view of the bobbin case 3.

9A is a front view of the digital camera 100 on which the coil component 10 is mounted, FIG. 9B is a right side view, and FIG. 9C is a bottom view.
The substrate 100 a of the digital camera 100 extends in the vertical and horizontal directions of the digital camera 100.
The coil component 10 is soldered to the lower end portion of the substrate 100a with the front surface of the coil component 10 facing downward. That is, the coil terminal portion 1e of the coil 1 is soldered to a wiring pattern serving as a circuit input, the coil terminal portion 1f of the coil 1 is soldered to a wiring pattern serving as a ground, and the metal body terminal portions 2a and 2b of the metal body 2 Are soldered to the wiring pattern serving as the ground, and the bobbin fixing terminal portions 3a to 3c of the bobbin case 3 are soldered to the wiring pattern serving as the ground.

  As shown in FIG. 10, the digital camera 100 can be placed on the cradle C in an upright state, and can perform near field communication with an antenna S built in the cradle C and having antenna directivity in the vertical direction.

FIG. 11A is a chart showing a change in the coupling strength when the shortest distance of the gap between the coil 1 and the metal body 2 is changed. Note that La = 3.2 mm, Lb = 5 mm, Ca = 5.3 mm, Cb = 5.0 mm, and the frequency is 4.48 GHz.
FIG. 11B is a graph in which the horizontal axis represents the ratio of the gap to the length La of the windings 1a and 1b of the coil 1 (referred to as the distance ratio), and the vertical axis represents the coupling strength.
The smaller the gap, the higher the bond strength. When the distance ratio exceeds 0.8, the bond strength suddenly decreases.
The coupling strength refers to the S21 characteristic (S parameter), which is one of the antenna characteristic evaluations, and is another coil facing the receiving antenna (approximately 10 mm apart) from the transmitting antenna (coil of the coil component). ) Is an index for evaluating the transmission characteristics. When transmission is possible from the transmitting antenna to the receiving antenna without any loss, the coupling strength is 0 dB, and the coupling strength decreases as the transmission loss increases.

(A) of FIG. 12 is a table | surface which shows the change of the coupling strength when the vertical width Ca and the horizontal width Cb of the metal body 2 are changed. Note that La = 3.2 mm, Lb = 5 mm, gap = 0.5 mm, and frequency is 4.48 GHz.
In FIG. 12B, the horizontal axis represents the ratio of the area Ca × Cb of the rectangle surrounding the metal body 2 to the area La × Lb of the rectangle surrounding the winding portion of the coil 1 (referred to as area ratio), and the coupling strength is It is the graph which made the vertical axis | shaft.
The bond strength increases as the vertical width Ca and the horizontal width Cb of the metal body 1 are increased. However, when the area ratio is 3 or more, the bond strength is saturated.

  From the results of FIGS. 11 and 12, it can be seen that the gap ratio is preferably 0.8 or less and the area ratio is preferably 1 to 3.

-Example 2-
FIG. 13A is a front view of the coil component 20 according to the second embodiment, FIG. 13B is a right side view, and FIG. 13C is a bottom view.
The bottom surface of the bobbin case 4 has a step 4g, and has a bottom shape that matches the step portion of the stepped substrate. Except for the bottom surface of the bobbin case 4 being a step 4g, the configuration is the same as that of the first embodiment.

-Example 3-
14A is a plan view of the coil component 30 according to the third embodiment, FIG. 14B is a front view, FIG. 14C is a right side view, and FIG. 14D is a bottom view.
The left and right ends of the metal body 5 are bent to form ribs, and the mechanical strength is increased. The structure is the same as that of the first embodiment except that the left and right ends of the metal body 5 are bent into ribs.
15A is a front view of the metal body 2, FIG. 15B is a right side view, and FIG. 15C is a bottom view.

Example 4
16A is a plan view showing the coil component 70 according to the fourth embodiment, FIG. 16B is a front view, FIG. 16C is a right side view, and FIG. 16D is a bottom view.
The coil component 70 uses a U-shaped coil having windings 7 a and 7 b obtained by winding an insulation-coated flat copper wire in a solenoid shape and deformed flatly as the coil 7, and has a shape suitable for the coil 7. The configuration is the same as that of the first embodiment except that the bobbin case 8 is used.

  Both end portions of the coil 7 are bent so as to be wound around end portions of the bobbin case 8 to form coil terminal portions 7e and 7f. The insulation coating on at least the bottom surface of the coil terminal portions 7e and 7f is removed and solder plated. As can be seen from FIG. 16D, the coil terminal portions 7e and 7f are exposed on the board mounting surface.

The bobbin case 8 is made of synthetic resin and has a coil housing space that is a space for housing the coil 7 and a metal body housing space that is a space for housing the metal body 2.
In the coil housing space, projections 8 d and 8 e are provided to be inserted into the windings 7 a and 7 b of the coil 7 in order to maintain the position of the coil 7 with respect to the bobbin case 8.

As shown in FIG. 16D, a part of the metal plate embedded in the bobbin case 8 is exposed on the board mounting surface to form bobbin fixing terminal portions 8a to 8c.
As shown in FIG. 16A, the bobbin case 8 includes a suction surface 8f that can be suctioned by a mounter on the side opposite to the board mounting surface.

  In the fourth embodiment, since the coil 7 having the windings 7a and 7b obtained by winding an insulation-coated flat copper wire in a solenoid shape and deformed flatly is used, the thickness of the coil 7 can be reduced.

-Example 5
FIG. 17A is a front view showing the coil component unit 60 according to the fifth embodiment, and FIG. 17B is a right side view thereof.
The coil component unit 60 includes a coil component 40 and a flexible printed board 50 having the coil component 40 fixed to the front surface.
Wiring patterns 50a, 50b, 50c, 50d, and 50e are formed on the front surface of the flexible printed board 50, and the resistor chips 51 and 52 and the connector 53 are fixed.
A metal layer 50 f is formed on the entire rear surface of the flexible printed board 50.
The wiring patterns 50a, 50b, 50e on the front surface of the flexible printed circuit board 50 and the metal layer 50f on the rear surface of the flexible printed circuit board 50 are electrically connected through a through hole 50g, and these are connected to the ground of the electronic device. The

18A is a plan view showing the coil component 40 according to the fifth embodiment, FIG. 18B is a front view, FIG. 18C is a right side view, FIG. 18D is a bottom view, and FIG. .
The coil component 40 is a coil 1 that has antenna directivity in the front-rear direction, a coil housing space that is a space for housing the coil 1, and a surface that is fixed to the front surface of the flexible printed circuit board 50. And a bobbin case 6 having a substrate mounting surface on the rear surface which is a surface orthogonal or substantially orthogonal to the direction of the characteristics.

  The coil 1 is shown in FIG. 4, and is a U-shaped coil having windings 1a and 1b obtained by winding an insulation-coated copper wire in a solenoid shape. Both ends of the coil 1 are bent so as to be processed into a flat plate shape and wound around the end of the bobbin case 6 to form coil terminal portions 1h and 1g. The insulation coating on at least the rear surface of the coil terminal portions 1h and 1g is removed and solder-plated. As can be seen from FIG. 18E, the coil terminal portions 1h and 1g are exposed on the board mounting surface.

19A is a plan view of the bobbin case 6, FIG. 19B is a front view, FIG. 19C is a right side view, FIG. 19D is a bottom view, and FIG.
The bobbin case 6 is made of synthetic resin and has a coil housing space 6g that is a space for housing the coil 1.
The coil housing space 6g is provided with protrusions 6d and 6e inserted into the windings 1a and 1b of the coil 1 in order to maintain the position of the coil 1 with respect to the bobbin case 6.

As shown in FIG. 19E, a part of the metal plate embedded in the bobbin case 6 is exposed on the board mounting surface to form a bobbin fixing terminal portion 6a.
As shown in FIG. 19B, the bobbin case 6 includes a suction surface 6f that can be sucked by a mounter on the side opposite to the substrate mounting surface.

20A is a front view of the flexible printed board 50, FIG. 20B is a right side view, and FIG. 20C is a rear view.
The flexible printed board 50 includes a coil component region 51 to which the coil component 40 is fixed, and a bending region 52 that can be bent so as to be orthogonal or substantially orthogonal to the coil component region 51.

  The wiring patterns 50b, 50d, 50e in the bent region 52 and the rear metal layer 50f constitute a microstrip line, which can be directly connected to the substrate of the electronic device, and does not require a coaxial cable for connection. The number of parts can be reduced. Although not shown, the wiring patterns 50b, 50d and 50e constituting the micro strip line are covered with a shielding material to suppress the influence of external noise.

  In the coil component 40, the coil terminal portion 1 g of the coil 1 is soldered to the wiring pattern 50 c serving as a circuit input, the coil terminal portion 1 h of the coil 1 is soldered to the wiring pattern 50 e serving as the ground, and the bobbin case 6 is fixed to the bobbin case 6. The terminal portion 6a is soldered to the wiring pattern 50a.

As shown in FIG. 21, the portions of the windings 1a and 1b of the coil 1 are seen from the front side on the portion of the metal layer 50f that contacts the back surface of the coil component region 51 in a positional relationship where the coil component 40 is fixed to the flexible printed board 50. The size and position of the metal layer 50f are set so that the projected image 1p of the portions of the windings 1a and 1b of the coil 1 can enter the portion of the metal layer 50f that hits the back surface of the coil component region 51 when projected. Yes. The size of the coil 1 is defined by the frequency band.
As a numerical example, when the frequency band is the GHz band, the length La of the windings 1a and 1b of the coil 1 is about 3.2 mm, and the width Lb of the coil 1 is about 5 mm. Further, the height Ca of the portion of the metal layer 50f that hits the back surface of the coil component region 51 is set to about 3.2 mm to about 3.2 mm in accordance with the internal space size of the electronic device using the coil component 40 and the characteristics required by the electronic device. The 8 mm, width Cb is selected to be a value between about 5 mm and about 8 mm.

22A is a front view of the digital camera 200 on which the coil component 40 is mounted, FIG. 22B is a right side view, and FIG. 22C is a bottom view.
The substrate 200a of the digital camera 200 extends in the vertical and horizontal directions of the digital camera 200.
The coil component unit 60 is soldered to the lower end portion of the substrate 200 a in a bent region 52 that is bent so as to be orthogonal or substantially orthogonal to the coil component region 51. The sensitivity region of the coil 1 extends below the digital camera 200.

  As shown in FIG. 23, this digital camera 200 can be placed on the cradle C in an upright state, and can perform near field communication with an antenna S that is built in the cradle C and has antenna directivity in the vertical direction.

-Example 6
A coil component 80 shown in FIG. 24 may be used in place of the coil component 40 in the fifth embodiment.
The coil component 80 uses a U-shaped coil having windings 7 a and 7 b obtained by winding an insulation-coated flat copper wire in a solenoid shape and deforming it flatly as the coil 7, and having a shape suitable for the coil 7. Except for using the bobbin case 9, the configuration is the same as that of the coil component 40 in the fifth embodiment.

  Both end portions of the coil 7 are bent so as to be wound around end portions of the bobbin case 9 to form coil terminal portions 7h and 7g. The insulation coating on at least the rear surface of the coil terminal portions 7h and 7g is removed and solder plated. As can be seen from FIG. 24E, the coil terminal portions 7h and 7g are exposed on the board mounting surface.

  As shown in FIG. 24B, the bobbin case 9 includes a suction surface 9f that can be suctioned by a mounter on the side opposite to the board mounting surface.

  In the sixth embodiment, since the coil 7 having the windings 7a and 7b obtained by winding the insulation-coated flat copper wire in a solenoid shape and deforming it into a flat shape is used, the overall thickness can be reduced.

  The coil component and the coil component unit of the present invention can be used as an antenna coil in the GHz band, for example.

1 Coil 1a, 1b Coil winding 1c, 1d Coil axis 1e, 1b Coil terminal part 2,5 Metal body 2a, 2b Metal body terminal part 3, 4 Bobbin case 3a, 3b, 3c Bobbin fixing terminal part 3d 3e Projection 3f Suction surface 3g Coil housing space 3h Metal body housing space 4g Step 10, 20, 30, 40 Coil component 50 Flexible printed circuit board 50f Metal layer 51 Coil component region 52 Bending region 60 Coil component unit 100, 200 Digital Camera C Cradle S Antenna

Claims (6)

A coil having antenna directivity in the front-rear direction, a metal body installed close to the rear of the coil so as to increase sensitivity in front of the coil, a coil housing space that is a space for housing the coil, and the metal body A metal body housing space that is a housing space and a bobbin case having a substrate mounting surface that is a surface that is fixed to the substrate surface of the electronic device and that is parallel or substantially parallel to the direction of the antenna directivity of the coil. A coil component comprising the coil component. 2. The coil component according to claim 1, wherein the winding portion of the coil and the metal body are disposed on the front surface of the metal body in a positional relationship in which the coil and the metal body are held in the bobbin case. A coil component having a size and a positional relationship such that a projected image of a winding portion of the coil can enter the front surface of the metal body when projected. 3. The coil component according to claim 1, wherein both end portions of the coil are exposed to a substrate mounting surface of the bobbin case to become a coil terminal portion, and at least a part of the metal body is a substrate mounting surface of the bobbin case. A coil part characterized in that a metal bobbin fixing terminal part is installed at least at one place on the board mounting surface of the bobbin case. 4. The coil component according to claim 3, wherein both end portions of the coil are processed into a flat plate shape, wound around the end portion on the board mounting surface side of the bobbin case, and the insulating coating on the portion exposed on the board mounting surface is removed to perform solder plating. Coil parts characterized by having a coil terminal portion. 5. The coil component according to claim 1, wherein the bobbin case includes an adsorption surface that can be adsorbed by a mounter on the side opposite to the substrate mounting surface. Comprising a coil component and a flexible printed circuit board having the coil component fixed to the front surface;
The coil component includes a coil having antenna directivity in the front-rear direction, a coil housing space that is a space for housing the coil, and a surface fixed to the front surface of the flexible printed circuit board, and the antenna directivity of the coil. A bobbin case having a substrate mounting surface which is a surface orthogonal or substantially orthogonal to the direction of
The flexible printed circuit board includes a coil component region to which the coil component is fixed, a bending region that can be folded so as to be orthogonal or substantially orthogonal to the coil component region, and the coil so as to increase sensitivity in front of the coil. A coil component unit comprising: a metal layer disposed on the rear side of the coil component unit.

Images