JP4722774B2 - Electronics - Google Patents

Description

  The present invention relates to an electronic apparatus such as a mobile phone having a wireless communication function using an electromagnetic field, a PDA (Personal Digital Assistant), and a digital camera.

  2. Description of the Related Art Electronic devices such as mobile phones are known to which functions similar to those of a non-contact type IC card are added. That is, such an electronic device has a loop antenna and an IC module connected to the loop antenna, and the information from the IC module by the reader / writer is inductively coupled by the loop antenna and the reader / writer antenna. Is read and information is written to the IC module.

  Patent Document 1 discloses a mobile phone having a battery housing part provided on the back side of a housing and a loop antenna (antenna coil) for proximity wireless communication provided on a battery cover covering the battery housing part. Yes. In this mobile phone, close proximity wireless communication is performed by making the outer surface of the battery cover face the reader / writer so that the loop antenna faces the reader / writer. However, since the battery is placed behind the loop antenna when viewed from the reader / writer, an eddy current is generated in the metal contained in the battery by the communication magnetic field applied by the reader / writer, and communication is performed by the eddy current. As a result, a reverse magnetic field that cancels the magnetic field is formed, and communication accuracy deteriorates.

In the technique of Patent Document 1, a magnetic sheet having an area larger than the area of the loop antenna is arranged between the battery and the loop antenna to suppress deterioration in communication accuracy. In addition, it is thought that the magnetic sheet mainly contributes to the suppression of the generation of eddy currents by shielding the battery from the communication magnetic field.
JP 2004-227046 A

  In the technique of Patent Document 1, since the antenna coil, the magnetic sheet, and the battery are stacked in order from the back side, a space for storing them in a stack must be secured in the housing, and the stacking direction However, the casing cannot be made thin.

  An object of the present invention is to provide an electronic device that can stably perform wireless communication using an electromagnetic field and can be downsized.

  An electronic device of the present invention is an electronic device that performs wireless communication with a communication target via an electromagnetic field, and has a casing having a predetermined surface that is disposed to face the communication target when performing the wireless communication; A metal member housed in the housing so as to face the inner side surface of the surface, an antenna arranged to face the inner side surface and circulate around the metal member, and a communication unit connected to the antenna And a magnetic member provided between the inner surface and the metal member and extending toward the space between the metal member and the antenna.

  Preferably, the metal member has a first surface facing the inner surface and a second surface adjacent to the first surface, and the magnetic member covers the first surface and the second surface. It arrange | positions so that at least one part of a surface may be covered.

  Preferably, the casing includes a rib extending between the antenna and the metal member on the inner side surface, and the magnetic member covers the inner side surface and covers at least a part of the rib. Has been placed.

  Preferably, a portion of the magnetic member extending toward the space between the metal member and the antenna extends to a position exceeding the position of the antenna.

  Preferably, the antenna is fixed to the housing.

  Preferably, the antenna is a loop antenna formed of a wire rod that is wound around the metal member a plurality of times, and the wire rods are arranged in parallel in a direction away from the inner surface.

  Preferably, the metal member is a battery.

  ADVANTAGE OF THE INVENTION According to this invention, the radio | wireless communication using an electromagnetic field can be performed stably and size reduction of an electronic device is possible.

  FIG. 1 is a perspective view showing an external appearance of a mobile phone 1 according to an embodiment of the present invention in an open state. The mobile phone 1 is configured as a so-called foldable mobile phone, and includes a reception case 2 and a transmission case 3 that are rotatably connected to each other between an open state and a closed state. The receiving case 2 and the transmitting case 3 are connected to each other by a connecting portion 4 that is the center of rotation, thereby constituting the entire case of the mobile phone 1. The receiving housing 2 and the transmitting housing 3 are each formed in a generally thin rectangular parallelepiped shape. In the closed state, the receiving housing 2 and the transmitting housing 3 are overlapped with each other so that their outlines substantially coincide with each other, and the overall shape is a substantially rectangular parallelepiped shape.

  The receiving case 2 is provided with, for example, a speaker 66 for calling (see FIG. 4) and a display unit 6 for displaying images and characters. The transmitter case 3 is provided with, for example, a call microphone 67 (see FIG. 4), an operation unit 7 composed of a plurality of keys for accepting user operations, and a notification speaker 68 (see FIG. 4). ing. In addition, 66a is a sound emission port for emitting sound output from the speaker 66, and 67a is a sound collection port for collecting sound input to the microphone 67.

  The transmitter case 3 includes a front case 21 on the side facing the receiver case 2 in the closed state, a rear case 22 on the back side, and a lid 23 that covers the back side of the rear case 22. Yes. The front case 21, the rear case 22, and the lid body 23 are made of, for example, non-conductive and non-magnetic resin.

  FIG. 2 is an exploded perspective view of a part of the transmission case 3. In FIG. 2, the upper side of the drawing is the side of the sending case 3 that faces the receiving case 2 in the closed state (the front side of the drawing in FIG. 1).

  Between the front case 21 (not shown in FIG. 2) and the rear case 22, a circuit board 25 and an antenna 26 for performing proximity wireless communication using electromagnetic induction are stacked. A battery (battery pack) 27 and a magnetic sheet 28 are stacked in a space formed by the opening of the rear case 22 and the lid 23.

  The circuit board 25 is constituted by, for example, a printed wiring board based on a resin, and various electronic components are mounted to form various electric circuits. For example, a communication processing unit 63 (see FIG. 4) for performing a long-distance wireless communication using radio waves, a CPU 61 that controls the operation of each unit such as the display unit 6 based on electrical signals from each unit such as the operation unit 7 ( 4). The circuit board 25 is provided with an IC module 29 that constitutes a communication unit that performs close proximity wireless communication using electromagnetic induction.

  Although not particularly illustrated, the circuit board 25 has a shield case mounted on the circuit board 25 to shield various electronic components in order from the circuit board 25 side, and a key of the operation unit 7. A flexible printed wiring board on which a plurality of pressing switches corresponding to the above are arranged, and a key sheet on which keys of the operation unit 7 are arranged are laminated.

  The antenna 26 is configured by a so-called loop antenna, and is formed of a wire 31 (see FIG. 3A) that forms a rectangular loop that faces the inner surface of the lid 23. In FIG. A plurality of loops are abstractly illustrated) and a terminal 32 provided at an end of the wire 31. When the transmitter case 3 is assembled, the terminal 32 abuts on a terminal (not shown) provided on the mounting surface facing the rear case 22 of the circuit board 25 to electrically connect the antenna 26 and the IC module 29. Connect to.

  The rear case 22 is formed with an opening 34 that opens to the back side, and a rib 35 that protrudes toward the circuit board 25 is formed at an edge of the opening 34 so as to surround the opening 34. The circuit board 25 and the rib 35 form a concave battery storage portion 36 (see FIG. 3B) that can store the battery 27. The shape and size of the battery housing portion 36 are the same shape and the same size as the battery 27, and the battery 27 is fitted into the battery housing portion 36.

  The battery 27 is a secondary battery constituted by, for example, a lithium ion battery, a battery cell in which a positive electrode containing lithium and a negative electrode containing carbon are stacked with a separator interposed therebetween and inserted into a metal case, and the battery A circuit board disposed on one surface of the cell and connected to the positive terminal and the negative terminal of the battery cell and provided with a connector, a protection circuit, etc., and integrally formed on the battery cell covering the circuit board Resin mold part. The battery 27 is not limited to the one described above, and the battery 27 and the circuit board may be housed in a resin case.

  The outer shape of the battery 27 is formed in a substantially rectangular parallelepiped shape. Specifically, the battery 27 is thin in the stacking direction of the rear case 22 and the lid body 23 and has a thin rectangular parallelepiped shape that is slightly longer in the longitudinal direction of the transmission housing 3, and faces the inner surface of the lid body 23. The back surface 27a and the side surface 27b orthogonal to the back surface 27a are provided. A terminal 38 is provided at the end of the battery 27 in the longitudinal direction opposite to the connecting portion 4 (left side in FIG. 2). The terminal 38 comes into contact with a terminal (not shown) that is electrically connected to the circuit board 25 through the notch 35 a of the rib 35 when the battery 27 is stored in the battery storage 36, and the circuit from the battery 27 is connected. It is possible to supply power to the substrate 25.

  The magnetic sheet 28 includes a magnetic material having a relatively high magnetic permeability. For example, it is made of rubber or resin containing magnetic powder and has flexibility. Examples of the magnetic material include ferrite, silicon steel, sendust alloy, Fe-Al alloy, electromagnetic soft iron, carbonyl iron, amorphous alloy, and permalloy. The magnetic sheet 28 is formed in a substantially rectangular shape, for example. The magnetic sheet 28 is attached to the battery 27 by an appropriate fixing means such as an adhesive.

  The lid body 23 has a substantially flat plate-like portion 23 a that constitutes a part of the back surface 3 a of the transmission housing 3. The plate-like portion 23 a is formed so as to fit into the battery housing portion 36, and covers the battery housing portion 36 and covers the rear case 22. The lid body 23 is fixed to the rear case 22 by engaging the engaging claws with the rear case 22.

  3A is a plan view conceptually showing the positional relationship between the battery 27 and the antenna 26 (viewed from below in FIG. 2), and FIG. 3A is a cross-sectional view taken along the line IIIb in FIG. It is sectional drawing of a -IIIb line arrow direction.

  As shown in FIGS. 2, 3 (a) and 3 (b), the wire 31 of the antenna 26 circulates around the rib 35 so as to surround the outer periphery of the rib 35 forming the battery housing portion 36. The battery 27 is circulated. Therefore, as shown in FIG. 3B, the antenna 26 is positioned within the thickness range of the battery 27, and the loop inner peripheral portion of the antenna 26 and the outer peripheral surface (including the side surface 27b) of the battery 27 face each other. ing. 3A and 3B exemplify the case where the wire 31 is arranged so as to make three rounds of the battery 27, but the number of turns may be an appropriate number of 1 or more. .

  As shown in FIG. 2, the magnetic sheet 28 has the same size as the back surface 27 a of the battery 27 on the lid 23 side in the longitudinal direction of the battery 27 (the direction along the side surface 27 b). It is slightly larger than the back surface 27a in the hand direction. Therefore, when the magnetic sheet 28 is attached to the battery 27, the magnetic sheet 28 covers the entire back surface 27a and a part of the side surface 27b. The portion of the magnetic sheet 28 that covers the side surface 27 b extends to the opposite side of the lid 23 to a position that exceeds the arrangement position of the antenna 26.

  FIG. 4 is a block diagram showing the configuration of the signal processing system of the mobile phone 1. In FIG. 4, a solid line connecting the blocks indicates a signal path including information, and a dotted line connecting the blocks indicates a power supply path.

  The mobile phone 1 includes a main function unit 51 that functions as a telephone or a digital camera, and a non-contact IC unit 52 that functions as a non-contact IC card. Power is supplied from the battery 27 to the main function unit 51 and the non-contact IC unit 52. In addition, signal transmission / reception is performed by serial communication between the main function unit 51 and the non-contact IC unit 52.

  The main function unit 51 includes a CPU 61, a memory 62, a communication processing unit 63, an acoustic processing unit 65, and an image processing unit 69. Each of these parts is constituted by an IC, for example.

  The CPU 61 and the memory 62 function as a control unit that performs predetermined calculations based on signals from various units such as the operation unit 7 and executes control of various units such as the image processing unit 69.

  The communication processing unit 63 includes a high-frequency circuit, and modulates various data such as acoustic data and image data processed by the CPU 61 in order to perform long-distance wireless communication using radio waves. To send. Further, the communication processing unit 63 demodulates a signal received via the antenna 64 and outputs the demodulated signal to the CPU 61.

  The sound processing unit 65 converts the sound data from the CPU 61 into sound signals and outputs the sound signals to the speaker 66 for calling and the speaker 68 for notifying incoming calls. The acoustic processing unit 65 converts the acoustic signal from the microphone 67 into acoustic data and outputs the acoustic data to the CPU 61.

  The image processing unit 69 converts the image data from the CPU 61 into an image signal and outputs it to the display unit 6. Further, the imaging signal (image data) output from the camera module 70 is converted into image data of a predetermined format and output to the CPU 61. Alternatively, the imaging signal output from the camera module 70 is converted into an image signal and output to the display unit 6.

  The non-contact IC unit 52 includes a power circuit 72, an RF circuit 73, a CPU 74, and a memory 75. Each of these parts is constituted by an IC, for example.

  The power supplied from the battery 27 is supplied to the RF circuit 73, the CPU 74 and the memory 75 via the power circuit 72.

  The RF circuit 73 is generated by a change in magnetic flux passing through the opening 26 a of the antenna 26, demodulates an electrical signal including various information, and outputs it to the CPU 74. Further, the RF circuit 73 modulates an electric signal including various information from the CPU 74 and outputs it to the antenna 26, and causes the antenna 26 to form a magnetic field corresponding to the electric signal.

  The CPU 74 and the memory 75 hold, read, and write (update) various information. Specifically, it is as follows. The memory 75 includes a ROM, a RAM, and an EEPROM (not shown). The CPU 74 functions as a control unit that manages information stored in the EEPROM of the memory 75 by executing a program stored in the ROM of the memory 75. That is, the CPU 74 reads information stored in the EEPROM of the memory 75 and outputs the information stored in the EEPROM of the memory 75 and updates the information stored in the EEPROM of the memory 75 based on the signal output from the RF circuit 73. I do.

  The information held in the EEPROM of the memory 75 is, for example, the amount charged when the non-contact IC unit 52 is configured to function as a debit card, and the non-contact IC unit 52 is used as a transportation commuter pass. When configured to function, it is a usable period or a usable section.

  The cellular phone 1 having the above configuration performs wireless communication using the electromagnetic field applied by the reader / writer when the back surface 3a of the transmitter casing 3 is brought close to the reader / writer.

  FIG. 5 is a conceptual diagram illustrating a state of a magnetic field related to the communication when performing close proximity wireless communication using electromagnetic induction in a mobile phone. FIG. 5A illustrates the magnetic field in the comparative example, and FIG. ) Shows the magnetic field in this embodiment. In FIG. 5, the upper side of the drawing is the lid 23 side, that is, the side facing the reader / writer RW.

  In a cellular phone in which an antenna, a magnetic sheet, and a battery are sequentially stacked as disclosed in Patent Document 1, the magnetic sheet shields the battery from a magnetic field applied by the reader / writer RW, and the eddy current in the battery Occurrence is suppressed.

  Therefore, even in a mobile phone in which the battery 27 is inserted into the opening 26a of the antenna 26 as in the comparative example of FIG. 5A, the magnetic field is shielded from the magnetic field applied by the reader / writer RW. It is conceivable to arrange the sheet 28 ′ on the back surface 27 a of the battery 27 that faces the reader / writer RW.

  In this case, the magnetic force line y1 traveling in the direction orthogonal to the back surface 27a travels along the magnetic sheet 28 'in the magnetic sheet 28'. Therefore, the battery 27 is shielded from the magnetic field applied by the reader / writer RW, and the generation of eddy currents in the battery 27 is suppressed. As a result, the generation of a reverse magnetic field that cancels the magnetic field applied by the reader / writer RW is also suppressed. However, on the other hand, since the magnetic flux directed to the opening 26a of the antenna 26 is also interrupted, the magnetic flux passing through the opening 26a is also reduced, and communication becomes unstable. In the technique of Patent Document 1, since the antenna is arranged in front of the magnetic sheet when viewed from the reader / writer, such a problem does not occur.

  However, as shown in FIG. 5B, in the mobile phone 1 of this embodiment, the magnetic sheet 28 covers the back surface 27a and extends so as to pass through the opening 26a. The magnetic force line y3 traveling along the magnetic sheet 28 passes through the opening 26a. That is, the magnetic flux toward the back surface 27 a of the battery 27 is directed to the opening 26 a while avoiding the battery 27. Therefore, the generation of eddy current in the battery 27 can be suppressed to prevent the generation of a reverse magnetic field, and a sufficient magnetic flux passing through the antenna 26 can be secured to perform stable communication. In addition, communication can be performed even if the antenna 26 is disposed in the vicinity of the battery 27.

  In the mobile phone 1, the antenna 26 is formed by the wire 31 that circulates around the battery 27 so as to form a loop facing the inner surface of the lid 23. In other words, the antenna 26 and the battery 27 Is not laminated, the housing can be made thinner than a conventional structure in which an antenna, a magnetic sheet, and a battery are laminated in order.

  In the above embodiment, the mobile phone 1 is an example of the electronic device of the present invention, the reader / writer RW is an example of the communication target of the present invention, and the transmission case 3 is an example of the case of the present invention. The back surface 3a of the transmission case 3 is an example of a predetermined surface that is disposed opposite to the communication target of the present invention, the antenna 26 is an example of the loop antenna of the present invention, and the IC module 29 is the communication of the present invention. The back surface 27a of the battery 27 is an example of the first surface of the present invention, and the side surface 27b of the battery 27 is an example of the second surface of the present invention.

  The present invention is not limited to the above embodiment, and may be implemented in various aspects.

  6A to 6E show a battery, an antenna, a magnetic sheet, and modified examples of their arrangement. 6A to 6E are cross-sectional views viewed in the same direction as FIG. 3B. However, the lid 23 and the ribs 35 are not shown. 6A to 6E, the same reference numerals are given to the same configurations as those in the above-described embodiment.

  FIG. 6A shows a modification of the antenna. In the antenna 101, the conductor 102 spirals the battery 27 so that a plurality of loops are stacked in the facing direction (up and down direction on the paper surface) of the battery 27 and the lid 23, that is, coaxially arranged. It is made up of laps. Also in this modification, the magnetic sheet 28 guides the magnetic flux toward the back surface 27a of the battery 27 to the opening 101a of the antenna 101 so as to avoid the battery 27, and stabilizes communication. Furthermore, in this modified example, the diameter of the antenna 101 can be made smaller than the antenna 26 in which the wire 31 is concentrically wound, and as a result, the small size in the direction along the back surface 27 a of the battery 27 of the mobile phone 1. Can be achieved.

  FIG. 6B shows a modification of the magnetic sheet. The magnetic sheet 111 extends from the back surface 27a of the battery 27 to the side surface 27b, further extends to the front surface 27c opposite to the back surface 27a, and covers the front surface 27c. Also in this modification, the magnetic sheet 111 guides the magnetic flux toward the back surface 27a of the battery 27 to the opening 26a of the antenna 26 so as to avoid the battery 27, and stabilizes communication. In this modification, since the magnetic flux directed to the front surface 27c of the battery 27 can be guided to the opening 26a while avoiding the battery 27, for example, communication can be performed regardless of which of the front and back surfaces of the housing is opposed to the reader / writer. It is effective for possible electronic devices.

  FIG. 6C shows a modification of the magnetic sheet. The portion of the magnetic sheet 121 extending from the back surface 27 a to the side surface 27 b of the battery 27 does not extend to a position exceeding the position of the antenna 26 (the position of the antenna 26 loop placement plane). Also in this modified example, the magnetic flux toward the back surface 27a is opened so as to avoid the battery 27 as compared with the case where the magnetic sheet 28 'is disposed so as to cover only the back surface 27a as shown in FIG. Since it is led to 26a, communication can be stabilized.

  As shown in this modification, the magnetic sheet spreads between the inner side surface and the battery so as to face the inner side surface of the casing, and the battery and the loop antenna from between the inner side surface and the battery. Need not extend to the antenna position. As shown in FIG. 6C, the battery has a rectangular parallelepiped shape. For example, a first surface (back surface 27a) that faces the inner surface of the housing, and a second surface (side surface 27b) that is substantially orthogonal to the surface. If the magnetic sheet extends beyond the ridgeline between the first surface and the second surface to the opposite side of the inner surface, the magnetic sheet faces the battery and the loop antenna. It can be clearly determined whether or not it extends.

  FIG. 6D is a modification of the magnetic sheet and the lid. The magnetic sheet 131 is fixed not to the battery 27 but to the lid 132 by a fixing means such as an adhesive. A rib 132 b is provided on the inner side surface 132 a of the lid 132 so as to protrude so as to face the side surface 27 b of the battery 27. The magnetic sheet 131 is provided from the inner side surface 132 a of the lid body 132 to the rib 132 b, thereby covering the back surface 27 a of the battery 27 and extending between the battery 27 and the antenna 26. Also in this modified example, the magnetic flux directed toward the back surface 27a is guided to the opening 26a while avoiding the battery 27, so that communication can be stabilized.

  As shown in this modification, the magnetic sheet extends between the inner surface of the housing and the battery, and extends from between the inner surface and the battery toward the battery and the loop antenna. If it can arrange | position, it may fix with respect to all members, such as a battery, a housing | casing, and a loop antenna.

  If the magnetic sheet is provided not only on the surface facing the battery in the housing but also on the rib protruding between the battery and the loop antenna as in this modification, the magnetic sheet extends to the antenna position. Even when it does not extend, it can be determined that the magnetic sheet is facing between the battery and the loop antenna.

  FIG. 6E shows a modification of the battery. The battery 141 is generally formed in a cylindrical shape as a whole, and is disposed with a part of the outer peripheral surface 141a facing the lid body 23 (upper side on the paper surface). The magnetic sheet 142 is disposed on the outer peripheral surface 141a and extends to the antenna position. Also in this modified example, since the magnetic flux directed to the battery 141 is guided to the opening 26a while avoiding the battery 141, communication can be stabilized.

  An electronic device to which the present invention is applied is not limited to a mobile phone as long as it includes a battery and performs proximity wireless communication using electromagnetic induction. For example, a digital camera or a notebook computer may be used.

  The communication unit provided in the electronic device may be any device that performs communication via a loop antenna, and is not limited to a device having a function of a non-contact IC card that communicates with a reader / writer. For example, the communication unit may be a reader / writer that reads and updates information of a non-contact IC card as a communication target. Even if it has a function of a non-contact IC card, it is not an essential requirement of the communication unit of the present invention to use a loop antenna as a power source as in the non-contact IC card.

  The loop antenna may be formed by winding a conductive wire around a predetermined core member (for example, the rib 35 in the embodiment) as long as the wire wraps around the battery to form a loop. It may be formed by printing a conductive pattern in a loop on a substrate such as a flexible printed wiring board. The conductors that form the plurality of loops may be twisted together. A plurality of loops may be formed by a plurality of conductors.

  The magnetic sheet may be any sheet that can be disposed between the battery and the housing, and may or may not have flexibility, and the thickness may not be uniform. For example, it may be a rigid plate-like magnetic body. In this embodiment, the magnetic sheet is formed on the back surface 27a and the longitudinal side surface 27b of the battery 27. However, the magnetic sheet may be formed on the lateral side surface 27b instead of extending to the longitudinal side surface 27b. Moreover, it may be formed on both side surfaces 27b in the longitudinal direction and the short side direction.

  Furthermore, the example in which the metal member disposed in the opening 26a of the loop antenna 26 is a battery has been described. However, the present invention is not limited thereto, and the present invention can be applied to a case where a metal member such as a shield case or a display device is disposed. Needless to say.

1 is an external perspective view showing a mobile phone according to an embodiment of the present invention in an open state. FIG. 2 is an exploded perspective view of a part of a transmission housing of the mobile phone in FIG. 1. FIG. 3 is a diagram illustrating a positional relationship between a battery and an antenna of the mobile phone in FIG. 1. The block diagram which shows the structure of the signal processing system of the mobile telephone of FIG. The conceptual diagram explaining the mode of the magnetic field when performing near field communication in the mobile telephone of FIG. The figure explaining the modification of the mobile telephone of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Mobile phone (electronic device), 3 ... Transmitting housing | casing, 27 ... Battery, 26 ... Loop antenna (antenna), 28 ... Magnetic sheet (magnetic member), 29 ... IC module (communication part), 31 ... Wire.

Claims (8)

An electronic device that performs wireless communication with a communication target via an electromagnetic field,
A housing having a predetermined surface that is disposed opposite to the communication target when performing the wireless communication;
A metal member housed in the housing so as to face the inner surface of the predetermined surface;
An antenna arranged to face the inner surface and circulate around the metal member;
A communication unit connected to the antenna;
A magnetic member provided between the inner surface and the metal member and extending toward the gap between the metal member and the antenna;
An electronic device comprising: An electronic device that performs wireless communication with a communication target via an electromagnetic field,
A housing having a predetermined surface that is disposed opposite to the communication target when performing the wireless communication;
A metal member housed in the housing so as to face the inner surface of the predetermined surface;
An antenna arranged to face the inner surface and circulate around the metal member;
A communication unit connected to the antenna;
A magnetic member that is at least partially provided between the inner surface and the metal member and guides a magnetic flux from the communication target to an opening of the antenna;
An electronic device comprising: The metal member has a first surface facing the inner surface, and a second surface adjacent to the first surface,
The magnetic member, the electronic device according to claim 1 or 2, characterized in that it is arranged so as to cover at least a portion of said second surface covering the first surface. The housing includes a rib extending from the inner surface to the antenna and the metal member,
The magnetic member, the electronic device according to claim 1 or 2, characterized in that it is disposed to cover at least part of the rib covering the inner surface. The magnetic member is in any one of claims 1 to 4, characterized in that the portion provided extends so as to pass through the aperture of the antenna between the metal member and the inner surface The electronic device described. The antenna electronic device according to any one of claims 1 to 5, characterized in that is fixed to the housing. The antenna is a loop antenna made of a wire material that is wound around the metal member a plurality of times,
The electronic apparatus according to any one of claims 1 to 6 , wherein the wires are arranged side by side in a direction away from the inner surface. The electronic device according to any one of claims 1 to 7 , wherein the metal member is a battery.

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