JP5798911B2 - Case for portable electronic device and portable electronic device using the same - Google Patents

Description

  The present invention relates to an antenna module, and also relates to a casing using the antenna module and a portable electronic device using them.

  It is known that a communication antenna coil of a reader / writer built in a mobile phone is formed by a flat cable wound around a side surface of a secondary battery insertion portion in the mobile phone (see, for example, Patent Document 1). .

JP 2010-161618 A

  However, when the antenna coil is formed by winding the flat cable on the side surface of the secondary battery insertion part as in the prior art, not only the winding work and positioning of the flat cable are troublesome, but also workability at the time of replacing the antenna coil There are problems such as not good.

  The present invention has been made in consideration of such circumstances, and provides an antenna module in which an antenna coil can be easily formed and the antenna coil can be easily replaced.

  The present invention is an antenna module comprising a rectangular frame-like flexible printed wiring board having strip-shaped edges on each of four sides, and a conductor pattern printed in a loop on the strip-shaped edges of the four sides. Is to provide.

  The antenna module according to the present invention includes a rectangular frame-like flexible printed wiring board having strip-shaped edges on each of the four sides, and a conductor pattern printed in a loop on the strip-shaped edges of the four sides. Since it is formed, not only the configuration is simple, but the two edges of the antenna module facing each other are bent at right angles to the edges of the other two sides to form two on the casing of the portable electronic device If the edges of the two sides bent in the groove are accommodated, it can be mounted on the housing very easily and compactly.

It is a top view of the antenna module by this invention. It is XX arrow sectional drawing of the antenna module of FIG. FIG. 2 is a perspective view showing a state where two opposite sides of the antenna module of FIG. 1 are bent. It is a perspective view of the housing | casing which loads the antenna module shown in FIG. FIG. 5 is a perspective view showing a state where the antenna module of FIG. 3 is loaded in the housing of FIG. 4. FIG. 6 is a cross-sectional view of the housing of FIG. 5. 1 is a perspective view of a mobile phone according to the present invention. 1 is a configuration explanatory diagram of a contactless card system according to the present invention. FIG.

  The antenna module according to the present invention includes a rectangular frame-like flexible printed wiring board (FPC) having strip-shaped edges on each of the four sides, and a conductor printed in a loop on the strip-shaped edges of the four sides. And a pattern. Here, the square includes a square and a rectangle.

You may further provide the connection terminal part which has the protrusion part which protrudes from one of the said edges, and the pattern for a connection formed on the said protrusion part and extending from the said conductor pattern.
You may further provide the overcoat laminated | stacked on both surfaces of the said printed wiring board.

  According to the present invention, two opposite edges for bending the antenna module are bent at right angles to the other two sides, two grooves for accommodating the bent two edges, and two other edges. It may be a case for a portable electronic device provided with an adhesive region for adhering the edges of the sides.

  The housing preferably includes a window that exposes the display surface of the display device in a region surrounded by the two grooves and the bonding region when the display device (for example, LCD) is accommodated.

  The present invention includes the antenna module in which two opposite edges are bent at right angles to the other two edges, two grooves for accommodating the two bent edges, and the other two edges. It may be a portable electronic device that includes a housing including an adhesion region for adhering and a communication device that is built in the housing and performs communication using the antenna module. Examples of the communication device that performs communication using the antenna module include an IC card and a reader / writer.

The housing has a window in a region surrounded by the two grooves and the adhesive region, and has a built-in display device (for example, LCD) that exposes the display surface from the window to the outside. It is preferable to be a frame.
Here, the portable electronic device includes a mobile phone, a portable communication terminal, a portable game machine, and the like.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.
1. Non-contact card system First, a non-contact card system using the antenna module of the present invention will be described.
FIG. 8 shows the configuration of the contactless card system according to the present invention. This non-contact card system supplies, for example, an IC card 100 corresponding to a commuter pass and power to be used as a non-contact power source to the IC card using electromagnetic waves as a medium, as well as reading and writing data and other necessary The reader / writer 200 performs processing.

  In the reader / writer 200, commands and write data, if necessary, are radiated as electromagnetic waves from the antenna coil 201, and unmodulated waves are radiated for a certain period. That is, first, the CPU 203 controls the modulation / demodulation circuit 202 so that a voltage corresponding to a predetermined modulation wave is applied to the antenna coil 201 in accordance with a predetermined program.

  When modulation processing is performed by the modulation / demodulation circuit 202, a voltage corresponding to the amplitude-modulated wave is applied to the antenna coil 201. Thereby, in the antenna coil 201, a current corresponding to the voltage flows, and a magnetic flux (magnetic field) corresponding to the change in the current is generated.

That is, an amplitude-modulated wave is radiated from the antenna coil 201 as an electromagnetic wave.
Thereafter, in the reader / writer 200, an unmodulated wave is radiated as an electromagnetic wave in the same manner as the amplitude-modulated wave described above.

  Then, it is determined whether or not there is a response from the IC card 100. Whether or not there is a response from the IC card 100 is determined by the CPU 203 based on a signal (demodulated signal) from the modulation / demodulation circuit 202.

  When the CPU 203 determines that there is no response from the IC card 100, that is, when the IC card 100 and the reader / writer 200 are not at a distance that causes mutual induction between the antenna coils 101 and 201, the IC card 100 Until there is a response, the process of radiating amplitude modulated waves and unmodulated waves is repeated as described above.

  On the other hand, when the CPU 203 determines that there is a response from the IC card 100, the necessary processing is performed based on the demodulated signal from the modulation / demodulation circuit 202 as the response obtained as described above.

  Next, the IC card 100 shown in FIG. 8 will be described. In the IC card 100, first, an electromagnetic wave radiated from the reader / writer 200 is received. That is, when the IC card 100 is brought close to the reader / writer 200 and the distance between the antenna coils 101 and 201 causes mutual induction, the antenna coil 101 generates an electromagnetic field (magnetic flux) radiated from the antenna coil 201. Among them, a counter electromotive force is generated in accordance with a change in magnetic flux interlinked there (change in magnetic field).

  Here, in the IC card 100, the antenna coil 101 forms a resonance circuit with a capacitor (not shown). Therefore, the voltage generated in the antenna coil 101 in a predetermined frequency band centered on the resonance frequency of the resonance circuit is efficiently supplied to the IC 102 in the subsequent stage.

  Then, supply of power to the IC 102 is started, a signal passing through the resonance circuit is detected, supplied to the regulator 103, and a constant voltage is supplied to the IC 102 as power.

  After the IC 102 is ready for operation, the signal that has passed through the resonance circuit is supplied with the IC 102 with its DC component removed.

  The IC 102 interprets a command included in the signal input thereto, and performs processing corresponding to the command.

2. Antenna Module Next, the antenna module of the present invention, a housing for mounting the antenna module, and a portable electronic device will be described.
FIG. 1 is a plan view of an antenna module according to the present invention, and FIG. 2 is a sectional view taken along the line XX of FIG. As shown in these drawings, the antenna module 1 includes a rectangular frame-shaped flexible printed wiring board (FPC) 2 having a strip-shaped edge having a width W (for example, 5 mm) on each of four sides 1a to 1d, A conductor pattern (that is, a loop antenna) 3 printed in a loop shape is provided on the strip-shaped edges of the sides 1a to 1d.

  A copper-clad laminate is used for the flexible printed wiring board 2, and the copper-clad laminate is a copper film having a thickness of about 20 to 100 microns on a plastic film such as polyester, polyimide, vinyl chloride resin, or glass laminate. Manufactured by bonding.

  In order to manufacture the antenna module 1 having the conductor pattern (loop antenna) 3 from the flexible copper-clad laminate, generally, after applying a photoresist to the copper-clad laminate, the portion corresponding to the conductor pattern 3 is exposed, After the etching process, the photoresist is removed.

Then, the overcoat 6 is bonded to both surfaces by heating and pressing, and cut into a desired shape, that is, the shape shown in FIG. The total thickness t at this time can be about 0.1 to 0.3 mm.
The overcoat 6 protects the contact between the conductors when the flexible printed circuit board 2 is used, and serves to protect the circuit from environmental conditions.

  As shown in FIG. 1, the antenna module 1 includes a connection terminal portion having a protruding portion that protrudes perpendicularly from the edge 1 d of the printed wiring board 2 and a connection pattern that extends from the conductor pattern (antenna coil) 3. 5 is provided.

  The antenna coil 3 has two terminals, one of which is connected to the connection pattern on the front surface of the connection terminal portion 5 and the other one is connected to the connection pattern on the back surface through the through hole 4. Yes. As will be described later, the connection terminal portion 5 is connected to an outlet inside the housing when the antenna module 1 is mounted on the housing.

FIG. 3 shows that the opposing long sides 1b and 1d of the antenna module 1 of FIG. 1 are bent at right angles along the broken line Y (FIG. 1) with respect to the other opposing short sides 1a and 1c. Shows the state.
FIG. 4 is a perspective view showing a housing according to the present invention. The housing 7 has a rectangular box shape, and has a rectangular display panel opening 8 on the surface, and two grooves 9 and 10 for inserting an antenna module formed along two long sides of the opening 8 respectively. The antenna module bonding regions 11 and 12 are formed along two short sides of the opening 8 respectively.

  The outer dimension of the housing 7 is 100 mm × 50 mm × 10 mm, and is formed by injection molding using a thermoplastic resin such as polystyrene as a material. The grooves 9 and 10 have a length corresponding to the lengths of the long sides 1b and 1d in FIG. 1, a depth corresponding to the width W, and a groove width corresponding to the thickness t in FIG. The dimensions are determined in consideration of machining tolerances.

  5 and 6 show two grooves formed along the long side of the opening 8 of the housing 7 shown in FIG. 4 with the edges of the long sides 1b and 1d bent at right angles of the antenna module 1 shown in FIG. 9 and 10 show a state in which the edges of the short sides 1a and 1b of the antenna module 1 are bonded to the housing 7 with an adhesive applied to the bonding regions 11 and 12 or an adhesive double-sided adhesive tape.

  As shown in FIG. 7, a display panel (also serving as a touch panel) 13 made of a mobile phone LCD is mounted in the opening 8 (FIG. 4) of the housing 7, and the modulation / demodulation circuit 202 shown in FIG. The reader / writer function unit 14 including the CPU 203 and the mobile phone function unit 15 are built in the housing 7.

The reader / writer function unit 14 and the antenna coil 3 of the antenna module 1 are connected to the connection terminal unit 5 by a connector (not shown). And the antenna coil 3 acts as the antenna coil 201 of FIG. In this way, the mobile phone 16 with a reader / writer function is completed.
In place of the reader / writer function unit 14 of FIG. 7, an IC card function unit including the IC 102 and the regulator 103 shown in FIG. 8 is incorporated, and the antenna coil 3 of the antenna module 1 functions as the antenna coil 101 of FIG. It can also be made.

  According to the present invention, the frame-shaped printed wiring board can be installed in a form in which the antenna module 1 can be formed of a frame-shaped printed wiring board and the area around the display panel 13 can be used most efficiently.

DESCRIPTION OF SYMBOLS 1 Antenna module 1a-1d Side 2 Flexible printed wiring board 3 Antenna coil 4 Through hole 5 Connection terminal part 6 Overcoat 7 Case 8 Opening 9 Groove 10 Groove 11 Adhesive area 12 Adhesive area 13 Display panel 14 Reader / writer function part 15 Mobile phone function unit 16 Mobile phone

Claims (3)

To mount an antenna module comprising a flexible printed wiring board having a rectangular frame shape having strip-shaped edges on each of the four sides and a conductor pattern printed in a loop on the strip-shaped edges of the four sides. Two grooves that accommodate two bent edges by bending the opposite two edges at right angles to the other two sides, and an adhesive region for bonding the other two edges, A housing for a portable electronic device comprising a window that exposes a display surface of a display device in a region surrounded by two grooves and an adhesive region when the display device is accommodated. 2. The portable electronic device according to claim 1 , wherein the antenna module further includes a connection terminal portion having a protrusion protruding from one of the edges and a connection pattern formed on the protrusion and extending from the conductor pattern. Equipment casing. A rectangular frame-shaped flexible printed wiring board having a band-like edge on each of the four sides and a conductor pattern printed in a loop on the four-side belt-like edges, and two opposite edges A housing having an antenna module bent at right angles to the edges of the other two sides, two grooves for accommodating the bent edges of the two sides, and an adhesive region for bonding the edges of the other two sides; A communication device that is built in the housing and performs communication using the antenna module, the housing has a window in a region surrounded by the two grooves and the bonding region, and the display surface is the window. A portable electronic device having a built-in display device exposed from the above, wherein the antenna module serves as a frame of the display surface.