JP2013168907A - Antenna device and electronic apparatus including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna device which enables an operator to easily recognize a portion serving as a reference for positioning and facilitates the assembly work.SOLUTION: An antenna device 1A includes: an antenna substrate 2 including an insulation substrate part 3 and a spiral shaped antenna element 4 provided on the substrate part 3; and a magnetic body sheet 7 that is laminated on a main surface of the antenna substrate 2, on which the antenna element 4 is provided, so as to cover the antenna element 4. The antenna element 4 includes a contact land 4a for electrically connecting with an external circuit, and the contact land 4a is disposed on a corner 2a of the antenna substrate 2 when the antenna substrate 2 is planarly viewed. The magnetic sheet 7 includes a cutout part 7a exposing the corner 2a of the antenna substrate 2 where the contact land 4a is provided.

Description

  The present invention relates to an antenna device used in an NFC (Near Field Communication) system that enables non-contact communication and an electronic apparatus including the antenna device.

  In general, in an NFC system that enables non-contact communication, the antenna element is affected by a metal object located in the vicinity of the antenna element, so that the problem that the communication distance is shortened and communication itself cannot be performed. Have the problem.

  For example, when a metal object is located at a short distance along the axial direction (that is, the magnetic field direction) of an antenna element configured in a ring shape or a spiral shape, the magnetic field of the antenna element is caused by the generation of counter electromotive force. This cancels out the mutual inductance necessary for communication, resulting in deterioration in communication characteristics.

  Conventionally, in order to solve this kind of problem, in an antenna device used in an NFC system, the antenna element is affected by surrounding metal objects by arranging a magnetic sheet in the vicinity of the antenna element. This makes it difficult to prevent deterioration of communication characteristics.

  For example, in an electronic device including a small terminal typified by a mobile phone or the like, it is difficult to dispose the antenna device and a metal object included in another component so as not to affect communication. Therefore, it is essential to incorporate the above-described magnetic sheet into the antenna device.

  As a document disclosing an antenna device in which the magnetic sheet is incorporated, for example, Japanese Patent Application Laid-Open No. 2006-41986 (Patent Document 1), Japanese Patent Application Laid-Open No. 2007-325054 (Patent Document 2), and No. 2010-161477 (Patent Document 3).

JP 2006-41986 JP 2007-325054 A JP 2010-161477 A

  In constructing an NFC system, it is important to position and assemble the antenna device with high accuracy with respect to a frame such as a casing or chassis of an electronic device. This is because, firstly, the antenna element needs to be positioned with high accuracy with respect to the platform mark provided on the electronic device (the mark for positioning the antenna device disposed opposite to the platform mark). Secondly, it is necessary to ensure electrical connection between the antenna element and the communication circuit.

  That is, if the antenna device is not positioned and assembled with high accuracy with respect to the frame, the antenna element mounting position with respect to the platform mark will be displaced, and thus communication will become unstable. Problems may arise, and the assembly position of the contact land of the antenna element with respect to the connection probe such as the contact spring or pobigon on the communication circuit side may be displaced, resulting in poor contact between these terminals. To do.

  In order to position and assemble the antenna device with respect to the frame with high accuracy, the frame and the antenna device are provided with reference portions for positioning, and the positioning accuracy is ensured by aligning these portions. It is possible. The alignment is assumed to be realized either by automating this using an image recognition device or the like, or by manually performing this, but in either case, the work efficiency is improved. For this purpose, it is necessary that the part serving as a reference for positioning can be recognized separately from other parts.

  However, usually, there are many cases where the color tone of the magnetic sheet incorporated in the antenna device is relatively close to the color tone of the frame such as the housing. For this reason, it is inevitable that the above-described reference part is difficult to be recognized, and the reference part is used only for positioning so that the color tone of the reference part is different from the color tone of other parts. Improvements such as applying a coloring treatment to the part are necessary. However, such improvement leads to an increase in manufacturing cost, and is not necessarily a preferable solution.

  On the other hand, if the improvement as described above is not performed, not only the tact time is deteriorated but also reassembly is frequently caused, resulting in deterioration of the antenna device. Or the antenna device is damaged and the yield deteriorates, resulting in an increase in manufacturing cost.

  Therefore, the present invention has been made to solve the above-described problems, and an antenna device that can easily recognize a reference portion for positioning and can perform assembly work more easily. It is an object of the present invention to provide an equipped electronic device.

  An antenna device according to the present invention includes an antenna substrate including an insulating substrate portion and an annular or spiral antenna element provided on the substrate portion, and a main surface of the antenna substrate on which the antenna element is provided. And a magnetic material sheet disposed so as to cover the antenna element. The antenna element includes a contact land for electrical connection with an external circuit. The contact land is arranged at a corner of the antenna substrate when the antenna substrate is viewed in plan. The magnetic sheet has a notch that exposes a corner of the antenna substrate where the contact land is provided.

  In the antenna device according to the present invention, it is preferable that a gold plating layer is provided on the contact land so as to cover the surface thereof.

  In the antenna device according to the present invention, the magnetic sheet further includes a notch that exposes a corner that is different from the corner provided with the contact land of the antenna substrate. preferable.

  An electronic apparatus according to a first aspect of the present invention includes the antenna device according to the present invention and a frame in which the antenna device is assembled. The frame includes a positioning portion that serves as a positioning reference when the antenna device is assembled. The positioning portion has a corner portion having a shape corresponding to a corner portion of the antenna substrate on which the contact land is provided. Here, the corner portion of the antenna substrate provided with the contact land is in contact with the corner portion.

  An electronic apparatus according to a second aspect of the present invention includes the antenna device according to the present invention and a frame in which the antenna device is assembled. In the antenna device, the magnetic sheet further includes a cutout portion that exposes a corner portion different from the corner portion on which the contact land of the antenna substrate is provided. The frame includes a pair of positioning portions serving as a positioning reference when the antenna device is assembled. One of the pair of positioning portions has a corner portion having a shape corresponding to a corner portion of the antenna substrate on which the contact land is provided. The other of the pair of positioning portions has a corner portion having a shape corresponding to a corner portion different from the corner portion provided with the contact land of the antenna substrate. Here, the corner of the antenna board on which the contact land is provided is in contact with the corner of the antenna board provided on one of the pair of positioning parts, and the contact land of the antenna board is provided. The corner portion that is different from the corner portion is in contact with a corner portion provided in the other of the pair of positioning portions.

  ADVANTAGE OF THE INVENTION According to this invention, the site | part used as the reference | standard for positioning can be recognized easily, and it can be set as the antenna device which can perform an assembly | attachment operation | work more easily, and an electronic device provided with the same. As a result, the manufacturing cost can be reduced, and an antenna device that can realize stable communication performance and an electronic apparatus including the antenna device can be provided.

It is a top view of the antenna apparatus in Embodiment 1 of this invention. It is sectional drawing of the antenna apparatus shown in FIG. It is a one part perspective view of the electronic device in Embodiment 1 of this invention. It is a disassembled perspective view which shows the assembly | attachment structure of the antenna apparatus in the electronic device shown in FIG. It is a top view of the antenna apparatus which concerns on the 1st modification based on Embodiment 1 of this invention. It is a top view of the antenna apparatus which concerns on the 2nd modification based on Embodiment 1 of this invention. It is a top view of the antenna apparatus in Embodiment 2 of this invention. It is a one part perspective view of the electronic device in Embodiment 2 of this invention. It is a disassembled perspective view which shows the assembly structure of the antenna apparatus in the electronic device shown in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiments, the same or common parts are denoted by the same reference numerals in the drawings, and description thereof will not be repeated.

(Embodiment 1)
FIG. 1 is a plan view of an antenna device according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view of the antenna device shown in FIG. 1 along the line II-II shown in FIG. First, an antenna device 1A according to the present embodiment will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, the antenna device 1 </ b> A in the present embodiment includes an antenna substrate 2 and a magnetic sheet 7. The antenna substrate 2 and the magnetic sheet 7 have a configuration in which the antenna substrate 2 and the magnetic sheet 7 are laminated in the thickness direction, and the magnetic sheet 7 covers the main surface of the antenna substrate 2. Specifically, the magnetic layer 7 is fixed to the antenna substrate 2 by sticking the adhesive layer 9 provided on the back surface side of the magnetic sheet 7 to the insulating layer 5 located on the main surface side of the antenna substrate 2. As a result, the antenna device 1A is configured.

  The antenna substrate 2 has a rectangular plate shape in plan view, and the magnetic sheet 7 has a notch 7 a at a position corresponding to one corner 2 a of the four corners of the antenna substrate 2. The sheet has a substantially rectangular sheet shape in plan view. The antenna substrate 2 and the magnetic material sheet 7 have substantially the same shape in plan view, except for the corner 2a of the antenna substrate 2 and the cutout portion 7a provided in the magnetic material sheet 7 corresponding thereto. It has a size.

  The antenna substrate 2 includes a substrate portion 3, an antenna element 4 formed on the surface of the substrate portion 3, an insulating layer 5 formed on the surface of the substrate portion 3 so as to cover the antenna element 4, and the substrate portion 3. It has the adhesion layer 6 formed on the back surface.

  The substrate unit 3 is made of an insulating plate-like member, and may be configured by a flexible substrate typified by a polyimide substrate or the like, or may be configured by a rigid substrate typified by a glass epoxy substrate or the like. Also good. That is, any substrate can be used as the substrate portion 3 as long as a conductive pattern described later can be formed on the surface thereof.

  The antenna element 4 is configured by a conductive pattern formed in an annular shape or a spiral shape in plan view. As shown in the figure, in the present embodiment, the conductive pattern constituting the antenna element 4 is formed in a spiral shape so as to be arranged along the peripheral edge of the substrate portion 3 on the surface of the substrate portion 3. Contact lands 4a are provided at both ends.

  A portion of the conductive pattern constituting the antenna element 4 excluding the contact land 4a is a portion that functions as an antenna, and functions as a loop antenna by being configured in a spiral shape as described above. As long as the loop antenna has a shape in which a conductor such as a conductive pattern is not located at the center portion, in addition to a rectangular shape as illustrated, a polygonal shape other than a rectangular shape, a perfect circular shape, an elliptical shape, etc. It can be configured in various shapes.

Here, the area of the portion where the conductor of the antenna element 4 is not located is preferably wider from the viewpoint of expanding a communicable range by generating a magnetic field in a wide range or receiving a wide range of magnetic fields, but this is too wide. If it is too large, mutual inductance with the external antenna device disposed opposite to the external antenna device cannot be ensured, and is preferably 500 mm ² or more and 3000 mm ² or less.

  The contact land 4a in the conductive pattern constituting the antenna element 4 serves as a terminal for electrically connecting the above-described portion functioning as a loop antenna to an external antenna circuit constituting the NFC system by cooperation. Is. A contact probe such as a contact spring or a pobigon electrically connected to the antenna circuit is disposed in contact with the contact land 4a. The contact lands 4a are all disposed at the corners 2a of the antenna substrate 2 described above.

  The antenna element 4 is preferably composed of a conductive pattern made of a good conductor typified by, for example, copper, silver, gold, nickel, aluminum and alloys thereof, but any conductive pattern made of a conductor can be used. It may consist of things. In addition, as a formation method of the antenna element 4, various methods, such as a printing method, a plating method, a vapor deposition method, a sputtering method, are applicable.

  The insulating layer 5 is composed of, for example, a resist film or a cover lay film, and is for protecting the conductive pattern constituting the antenna element 4. As a method for forming the insulating layer 5, a coating method, a bonding method, or the like can be applied. The portion of the insulating layer 5 corresponding to the contact land 4a of the antenna element 4 is removed, so that the contact land 4a is exposed at the corner 2a of the antenna substrate 2.

  The adhesive layer 6 is for attaching and fixing the antenna device 1A to a frame such as a housing or chassis of an electronic device, and can be constituted by various known adhesives.

  On the other hand, the magnetic material sheet 7 includes a base material portion 8, an adhesive layer 9 formed on the back surface of the base material portion 8, and a protective layer 10 formed on the surface of the base material portion 8. Here, as described above, the magnetic sheet 7 has the cutout portion 7a for exposing the corner portion 2a at a portion corresponding to the corner portion 2a of the antenna substrate 2, and the cutout portion 7a The base portion 8, the adhesive layer 9, and the protective layer 10 are configured by cutting out portions corresponding to the corner portions 2a of the antenna substrate 2.

  The base material portion 8 is made of a member formed in a sheet shape such as a plate shape, a film shape, or a layer shape, and is preferably made of ferrite which is a ceramic mainly composed of iron oxide. There are two types of ferrite called soft ferrite showing soft magnetism and hard ferrite showing hard magnetism. Soft ferrite can be used as a magnetic material for an antenna device used in an NFC system. preferable.

  Moreover, as the base material part 8 made of ferrite, a ferrite sheet formed by kneading magnetic powder and polymer resin may be used, or formed by sintering the raw material after dry-molding the raw material. The sintered ferrite sheet thus obtained may be used.

  Here, when a ferrite sheet is used as the base material portion 8, the thickness is preferably about 0.05 mm to 3.0 mm. In addition, as the base material part 8, it is not restricted above, It is also possible to use what contains magnetic materials other than a ferrite as a raw material.

  The pressure-sensitive adhesive layer 9 is for attaching and fixing the magnetic material sheet 7 to the main surface of the antenna substrate 2 and can be constituted by various known pressure-sensitive adhesives.

  The protective layer 10 is for protecting the base material part 8 made of ferrite, and the base material part 8 is damaged, or the base material part 8 comes into contact with other parts and is electrically connected. To prevent it. As a method for forming the protective layer 10, a coating method, a bonding method, or the like can be applied.

  The antenna device 1A according to the present embodiment described above has a configuration in which the antenna element 4 is provided only on the main surface side which is one side of the antenna substrate 2, and therefore the antenna element is provided on both sides of the antenna substrate. The manufacturing cost is reduced as compared with the case where it is provided.

  The antenna device 1A in the present embodiment is attached and fixed using an adhesive layer 6 provided on the back surface side of the antenna substrate 2 after being positioned with respect to a frame such as a housing or chassis of an electronic device. The positioning at the time of the pasting and fixing is performed automatically by using an image recognition device or the like, or is performed manually. When the electronic device is a portable small terminal such as a mobile phone, the internal configuration is frequently changed due to the trend of design and technological progress, so the production period per model is not so long. When this is taken into consideration, it is efficient that the position is manually aligned and fixed.

  In the antenna device 1A according to the present embodiment, among the various layers constituting the antenna device 1A, the base material portion 8, the adhesive layer 9 and the protective layer 10 constituting the magnetic sheet 7 are provided on the antenna substrate. The portion corresponding to the corner portion 2a provided with the two contact lands 4a is cut out in the same shape, so that the corner portion 2a provided with the contact lands 4a of the antenna substrate 2 is exposed. .

  Therefore, in the antenna device 1A having the above-described configuration, the corner 2a has a color tone that is significantly different from that of other parts (that is, parts covered by the magnetic sheet 7). The contrast between the corner 2a and the other part can be increased, and the corner 2a can be easily recognized. Therefore, by using the antenna device 1A having the above configuration, when assembling the frame 2 such as a housing or chassis of the electronic device as a positioning reference when assembling the corner 2a having a color tone different from that of the surrounding portion. As a result, the assembly work can be performed more easily.

  Here, as in the antenna device 1A according to the present embodiment, when the corner portion 2a when viewed in plan is used as a positioning reference, the vertical displacement, the lateral displacement, and the rotational displacement when assembled. Since both can be suppressed simultaneously, it is very effective in securing high positional accuracy.

  Note that the above-described ease of assembling work can be realized both in the case where the alignment at the time of attaching and fixing is automated and in the case where it is performed manually.

  Moreover, it is preferable that the surface of the conductive pattern of the portion constituting the contact land 4a which is a part of the antenna element 4 is preferably covered with a gold plating layer. If comprised in this way, not only the contact resistance between the said contact land 4a and connection probes, such as the contact spring arrange | positioned in contact with this, or a pobigon, can be suppressed low, or connection reliability is maintained high, The corner 2a can be recognized more easily.

  3 is a perspective view of a part of the electronic device according to the present embodiment, and FIG. 4 is an exploded perspective view showing the assembly structure of the antenna device in the electronic device shown in FIG. Next, with reference to these FIG. 3 and FIG. 4, the electronic device 20A in the present embodiment and the assembly structure of the antenna device 1A in the electronic device 20A will be described.

  As shown in FIG. 3, in electronic device 20 </ b> A in the present embodiment, positioning portion 22 protrudes from a predetermined position on the inner bottom surface of housing 21 that is a frame. The positioning portion 22 is provided by being previously positioned with respect to a platform mark formed on the outer bottom surface corresponding to the inner bottom surface.

  The positioning part 22 has an L-shaped shape in plan view and has a corner part 22a. The corner portion 22a is configured to have a shape corresponding to the above-described corner portion 2a of the antenna device 1A.

  Here, the antenna device 1 </ b> A is positioned and fixed on the inner bottom surface of the housing 21 by the above-described corner portion 2 a being in contact with the entering corner portion 22 a of the positioning portion 22. More specifically, the pair of side surfaces of the portion corresponding to the corner portion 2a of the antenna device 1A are in contact with the two surfaces constituting the corner portion 22a of the positioning portion 22, respectively.

  In order to realize the assembled state, as shown in FIG. 4, when the antenna device 1A is attached and fixed to the inner bottom surface of the housing 21 during assembly, the corner portion 2a of the antenna device 1A described above is attached. The pair of side surfaces of the corresponding part may be bonded and fixed while aligning so that the two surfaces constituting the corner portion 22a of the positioning portion 22 described above are in contact with each other.

  Here, in the electronic device 20A according to the present embodiment, even if the color tone of the magnetic sheet 7 and the color tone of the housing 21 are relatively close, the electronic device 20A corresponds to the above-described corner portion 2a of the antenna device 1A. Since the notched portion 7a is provided in the magnetic sheet 7 of the portion, the corner portion 2a has a color tone that is significantly different from that of the other portion of the antenna device 1A as well as the housing 21, so that the corner portion 2a It becomes possible to easily recognize the boundary portion between the antenna device 1A and the housing 21. Therefore, the assembly work of the antenna device 1A to the housing 21 can be easily performed.

  Note that the above-described ease of assembling work can be realized both in the case where the alignment at the time of attaching and fixing is automated and in the case where it is performed manually.

  By adopting such an assembly structure, the antenna device 1A is positioned by the positioning portion 22 and fixed to the housing 21. Therefore, the antenna device 1A provided in the antenna device 1A and the housing 21 are provided. The platform mark thus obtained is positioned with high accuracy.

  Further, after the antenna device 1A is assembled to the housing 21, connection work for connecting the antenna element 4 provided in the antenna device 1A and the above-described antenna circuit is performed. Even during work, the antenna device 1A is positioned and fixed in advance with respect to the housing 21, so that a contact probe such as a contact spring or a pobigon arranged in contact with the contact land 4a of the antenna device 1A. On the other hand, it becomes possible to position with high accuracy.

  In the electronic device 20A according to the present embodiment, the positioning unit 22 having the corner portion 2a of the antenna device 1A in a plan view and having a corner portion 22a having a shape corresponding to the corner portion 2a. Since the antenna device 1A is positioned using the antenna, it is possible to simultaneously suppress any deviation in the vertical direction, lateral deviation and rotational deviation during assembly. It is possible to secure the attaching position accuracy.

  Therefore, by using the antenna device 1A according to the present embodiment and the electronic apparatus 20A including the antenna device 1A, it is possible to easily recognize a reference portion for positioning, and the assembly work can be performed more easily. become. As a result, the manufacturing cost can be reduced, and the antenna device 1A capable of realizing stable communication performance and the electronic apparatus 20A including the antenna device 1A can be obtained.

  FIG. 5 is a plan view of an antenna device according to a first modification based on the present embodiment. Next, with reference to this FIG. 5, the antenna apparatus 1B which concerns on the 1st modification based on this Embodiment is demonstrated.

  As shown in FIG. 5, the antenna device 1B according to the first modification is different from the antenna device 1A according to the present embodiment described above in the shapes of the antenna substrate 2 and the magnetic sheet 7 when viewed in plan. Yes.

  Specifically, as shown in FIG. 5, in the antenna device 1B according to the present embodiment, the antenna substrate is provided by providing a notch 2c at one corner of the antenna substrate 2 when viewed in plan. 2 is configured to have a substantially L shape, and the magnetic sheet 7 is also provided by providing a notch 7c at a corresponding corner of the magnetic sheet 7 attached to the antenna substrate 2. It is comprised so that it may have a substantially L-shaped shape.

  Here, also in the antenna device 1B according to the first modified example, the contact land 4a of the antenna element 4 is formed at one corner 2a of the corner corresponding to the projected corner of the antenna substrate 2 in a plan view. The notch part 7a which exposes the corner | angular part 2a containing the contact land 4a is provided in the magnetic material sheet 7 of the part corresponding to the said corner | angular part 2a.

  Even when configured in this way, the corner 2a having a color tone different from that of the surrounding part can be used as a positioning reference when assembling, and as in the case of the above-described embodiment, Assembling work can be performed more easily.

  FIG. 6 is a plan view of an antenna device according to a second modification based on the present embodiment. Next, with reference to FIG. 6, antenna device 1C according to a second modification based on the present embodiment will be described.

  As shown in FIG. 6, the antenna device 1C according to the second modified example is different from the antenna device 1A according to the present embodiment described above in the shapes of the antenna substrate 2 and the magnetic sheet 7 when viewed in plan. Yes.

  Specifically, as shown in FIG. 6, in the antenna device 1C according to the present embodiment, the antenna substrate 2 is framed by providing an opening 2d at the center of the antenna substrate 2 when viewed in plan. The magnetic material sheet 7 also has a frame shape by providing an opening 7d in a corresponding part of the magnetic material sheet 7 affixed to the antenna substrate 2. It is configured as follows.

  Here, also in the antenna device 1C according to the second modified example, the contact land 4a of the antenna element 4 is arranged at one corner 2a among the corners of the antenna substrate 2 in a plan view. A cutout portion 7a for exposing the corner portion 2a including the contact land 4a is provided in a portion of the magnetic sheet 7 corresponding to the corner portion 2a.

  Even when configured in this way, the corner 2a having a color tone different from that of the surrounding part can be used as a positioning reference when assembling, and as in the case of the above-described embodiment, Assembling work can be performed more easily.

  When the above configuration is adopted, in an electronic device (for example, a mobile phone) in which the antenna device 1C is incorporated, other component parts (for example, for example, in the hollow portion provided in the central portion of the antenna device 1C) It is possible to arrange all or part of a speaker device, a vibration device, a camera device, a light source (LED) device, an infrared communication device, etc. Therefore, in the space inside the limited housing of the electronic device, the antenna element 4 can be arranged with the largest possible size, and the electronic device can be downsized.

(Embodiment 2)
FIG. 7 is a plan view of the antenna device according to the second embodiment of the present invention. First, with reference to FIG. 2, antenna device 1D in the present embodiment will be described.

  As shown in FIG. 7, the antenna device 1D according to the present embodiment includes the antenna device 1A according to the first embodiment of the present invention described above, the layout of the antenna element 4 provided on the antenna substrate 2, and the magnetic sheet 7. The shape is different.

  Specifically, in the antenna device 1D according to the present embodiment, the corner of the conductive pattern constituting the antenna element 4 at the corner 2b different from the corner 2a where the contact land 4a of the antenna substrate 2 is provided. The portion has a shape that is slightly rounded inward, and the cutout portion 7b is also provided in the magnetic sheet 7 that covers the corner portion 2b in accordance with the shape. Here, the radius of curvature of the slightly rounded corner portion of the conductive pattern is preferably about 2.0 mm to 4.0 mm from the viewpoint of reducing the influence on the communication performance. In addition to rounding the corner portion of the conductive pattern slightly larger, the corner portion of the conductive pattern may be linearly shortcut.

  Here, the notch portion 7b provided in the magnetic sheet 7 is not of a size and shape that exposes the portion of the antenna substrate 2 where the antenna element 4 is provided, and the antenna in the portion where the antenna element 4 is not located. It is assumed that the size and shape of the corner 2b of the substrate 2 are exposed to the maximum. In this way, it is possible to suppress the deterioration of communication characteristics and the change of the resonance frequency due to the influence of an external metal object.

  When configured in this way, in addition to the corner portion 2a provided with the contact land 4a of the antenna device 1D, the corner portion 2b also has other parts (that is, the corner portion 4b where the contact land 4a is not provided). The color tone is significantly different from that of the portion covered with the magnetic sheet 7. Therefore, the two corners 2a and 2b of the antenna device 1D can be easily recognized. Therefore, when the antenna device 1D having the above configuration is used, when assembling the two corners 2a and 2b having a color tone different from that of the peripheral portion when the electronic device is assembled to a frame such as a housing or chassis. Therefore, the assembling work can be performed more easily.

  FIG. 8 is a perspective view of a part of the electronic device according to the present embodiment, and FIG. 9 is an exploded perspective view showing the assembly structure of the antenna device in the electronic device shown in FIG. Next, with reference to these FIG. 8 and FIG. 9, the assembly structure of the electronic device 20B in this Embodiment and the antenna apparatus 1D in the said electronic device 20B is demonstrated.

  As shown in FIG. 8, in electronic device 20 </ b> B according to the present embodiment, in addition to positioning portion 22, positioning portion 23 is further provided at a predetermined position on the inner bottom surface of housing 21 that is a frame. . These positioning portions 22 and 23 are previously positioned with respect to a platform mark formed on the outer bottom surface corresponding to the inner bottom surface.

  Similar to the positioning unit 22, the positioning unit 23 has an L-shaped shape in plan view and has a corner portion 23a. The corner portion 23a is configured to have a shape corresponding to the above-described corner portion 2b of the antenna device 1D.

  Here, the antenna device 1D is positioned by the above-described corner portion 2a being in contact with the corner portion 22a of the positioning portion 22, and the corner portion 2b described above is the corner portion of the positioning portion 23. It is positioned by being in contact with 23 a and is fixed on the inner bottom surface of the casing 21 by being fixed. More specifically, the pair of side surfaces of the portion corresponding to the corner portion 2a of the antenna device 1D are in contact with the two surfaces constituting the corner portion 22a of the positioning portion 22, respectively. The pair of side surfaces of the portion corresponding to the portion 2 b are in contact with the two surfaces constituting the corner portion 23 a of the positioning portion 23.

  In order to realize the assembled state, as shown in FIG. 9, when the antenna device 1D is attached and fixed to the inner bottom surface of the housing 21 during assembly, the corner portion 2a of the antenna device 1D described above is attached. The pair of side surfaces of the corresponding part is aligned so as to abut against the two surfaces constituting the entrance corner part 22a of the positioning part 22 described above, and the pair of parts corresponding to the corner part 2b of the antenna device 1D described above. It is only necessary that the side surfaces of the positioning portion 23 are affixed to each other while being aligned so that the side surfaces thereof come into contact with the two surfaces constituting the corner portion 23a of the positioning portion 23 described above.

  Here, in the electronic apparatus 20A according to the present embodiment, even if the color tone of the magnetic sheet 7 and the color tone of the casing 21 are relatively close, the above-described two corners 2a and 2a of the antenna device 1D are used. The notches 7a and 7b are provided in the magnetic material sheet 7 corresponding to 2b, so that the two corners 2a and 2b have a color tone significantly different from that of the housing 21 as well as other parts of the antenna device 1D. Therefore, the boundary between the antenna device 1D and the housing 21 can be easily recognized at the two corners 2a and 2b. Therefore, the assembly work of the antenna device 1D with respect to the housing 21 can be easily performed.

  Therefore, by adopting such an assembly structure, the antenna device 1D is positioned by the positioning portions 22 and 23 and is fixed to the housing 21, so that the antenna element 4 provided in the antenna device 1D and The platform mark provided on the housing 21 is positioned with high accuracy.

  In addition, after the antenna device 1D is assembled to the housing 21, a connection work for connecting the antenna element 4 provided in the antenna device 1D and the above-described antenna circuit is performed. Even during the work, the antenna device 1D is positioned and fixed in advance with respect to the housing 21, so that a contact probe such as a contact spring or a pobigon is arranged on the contact land 4a of the antenna device 1D. On the other hand, it becomes possible to position with high accuracy.

  In the electronic device 20B according to the present embodiment, the two corners 2a and 2b of the antenna device 1A when viewed in plan are used as positioning references, and the shape corresponding to the two corners 2a and 2b is input. Since the positioning of the antenna device 1D is performed by using the positioning portions 22 and 23 having the corner portions 22a and 23a, any of displacement in the vertical direction, displacement in the horizontal direction, and displacement in the rotation direction at the time of assembly is selected. At the same time, it can be more reliably suppressed, and higher assembly position accuracy can be ensured.

  Therefore, by using the antenna device 1D and the electronic apparatus 20B including the antenna device 1D according to the above-described embodiment, a portion serving as a reference for positioning is easily provided as in the above-described first embodiment of the present invention. Can be recognized easily, and the assembly work can be performed more easily. As a result, the manufacturing cost can be reduced, and the antenna device 1D capable of realizing stable communication performance and the electronic apparatus 20B including the antenna device 1D can be provided.

  The above-described embodiments and modifications thereof disclosed herein are illustrative in all respects and are not restrictive. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1A to 1D antenna device, 2 antenna substrate, 2a, 2b corner portion, 2c cutout portion, 2d opening portion, 3 substrate portion, 4 antenna element, 4a contact land, 5 insulating layer, 6 adhesive layer, 7 magnetic sheet, 7a, 7b, 7c Notch, 7d Opening, 8 Substrate, 9 Adhesive layer, 10 Protective layer, 20A, 20B Electronic equipment, 21 Housing, 22, 23 Positioning part, 22a, 23a Inset corner.

Claims (5)

An antenna substrate including an insulating substrate portion and an annular or spiral antenna element provided on the substrate portion;
A magnetic sheet laminated on the main surface of the antenna substrate on which the antenna elements are provided so as to cover the antenna elements;
The antenna element includes a contact land for electrical connection with an external circuit,
The contact land is disposed at a corner of the antenna substrate when the antenna substrate is viewed in plan view,
The antenna device, wherein the magnetic sheet has a notch that exposes a corner of the antenna substrate where the contact land is provided.   The antenna device according to claim 1, wherein a gold plating layer is provided on the contact land so as to cover a surface of the contact land.   3. The antenna device according to claim 1, wherein the magnetic sheet further includes a notch that exposes a corner different from the corner provided with the contact land of the antenna substrate. The antenna device according to claim 1 or 2,
A frame assembled with the antenna device,
The frame includes a positioning portion that serves as a positioning reference when the antenna device is assembled;
The positioning portion has a corner portion having a shape corresponding to a corner portion of the antenna substrate provided with the contact land,
An electronic device, wherein a corner portion of the antenna substrate provided with the contact land is in contact with the corner portion. An antenna device according to claim 3,
A frame assembled with the antenna device,
The frame includes a pair of positioning portions that serve as a positioning reference when the antenna device is assembled;
One of the pair of positioning portions has a corner portion having a shape corresponding to a corner portion on which the contact land of the antenna substrate is provided,
The other of the pair of positioning portions has a corner portion having a shape corresponding to a corner portion different from the corner portion where the contact land of the antenna substrate is provided,
The corner portion of the antenna substrate on which the contact land is provided is in contact with the corner portion provided on one of the pair of positioning portions,
An electronic device, wherein a corner of the antenna substrate that is different from the corner provided with the contact land is in contact with a corner provided on the other of the pair of positioning portions.

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