JP2008011275A - Data communication apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restrain the variation in the shape after assembling loop coil antenna and to stabilize communication performance, in a data communication apparatus having a loop coil antenna for performing noncontact data communication using electromagnetic induction. <P>SOLUTION: A loop coil antenna 56 is arranged to inside of a housing (case) 42 so that at least a part of conductor goes around along the side surface of the housing (case) 42, and is fixed by a frame-like member 57 from above. To be concrete, a recess 62 for housing the battery 61 is formed in the housing (case) 42, and the loop coil antenna 56 is arranged around the recess 62. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a data communication apparatus having a loop coil antenna for performing contactless data communication.

  In a data communication apparatus such as a portable communication terminal having a loop coil antenna for performing non-contact data communication (for example, Patent Document 1), in order to secure wireless communication performance and suppress variation, a fixing method of the loop coil antenna is There are affixing to a guide wall in the body with an adhesive tape, an engaging structure with an engaging claw, and the like.

In Patent Document 1, the loop coil antenna may be fixed to the side surface of the housing 2a by using an adhesive, or may be fixed by being inserted into an insertion portion provided on the side surface of the housing. Further, the loop coil antenna 5 may be directly embedded in the side surface of the resin casing 2a, or the conductive wire 5 is pattern-plated on the side surface of the resin casing 2a. It is described that the conductor 5a may be disposed in a groove formed on the side surface of the housing 2a.
JP 2005-26865 A

  However, as described above, the sticking with the adhesive tape, the engagement structure, and the like have difficulty in assembling, and performance variations due to variations in the position of the conducting wire after assembly.

Further, in Patent Document 1, when the loop coil antenna 5 is bonded and fixed to the side surface of the housing 2a using an adhesive, an error is likely to occur in the antenna fixing position, and variations in antenna characteristics are likely to occur. Moreover, it is difficult to remove the antenna.
Further, when the loop coil antenna 5 is fixed by being inserted into the insertion portion provided on the side surface of the housing 2a, the antenna is lifted up, and the antenna characteristics are likely to vary.
Further, when the loop coil antenna 5 is directly embedded in the side surface of the housing 2a, there is a risk that the antenna embedding portion may crack or the antenna may be deformed or disconnected when the housing is dropped.
Further, when the loop coil antenna 5 is pattern-plated on the side surface of the casing 2a, the area where plating can be performed is limited. For example, when the battery housing recess is formed in the casing 2a, the casing It is difficult to form on the bottom side of 2a.
Further, when the loop coil antenna 5 is disposed in a groove formed on the side surface of the housing 2a, there is a problem that the antenna is lifted and the antenna characteristics are likely to vary.

  SUMMARY OF THE INVENTION An object of the present invention is to stabilize communication performance in a data communication apparatus having a loop coil antenna for performing non-contact data communication by suppressing variation in shape after incorporation of the loop coil antenna.

  In order to solve the above problems, the invention according to claim 1 is a data communication apparatus having a loop coil antenna for performing non-contact data communication, wherein the loop coil antenna is arranged on an inner surface of a housing, and It is characterized by being fixed from above by a frame-shaped member.

  A second aspect of the present invention is the data communication device according to the first aspect, wherein the casing is formed with a recess for storing a battery, and the loop coil antenna is formed around the recess. Is arranged.

  According to the present invention, since the loop coil antenna disposed on the inner surface of the housing is fixed with a frame-shaped member from above, the variation in shape after the loop coil antenna is assembled can be suppressed, so that the communication performance is stable. Can be achieved.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
FIG. 1 is a front perspective view of a folding mobile phone as an embodiment of a data communication apparatus to which the present invention is applied, FIG. 2 is a rear perspective view of the same, and FIG. 3 is a folding view. FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3, FIG. 5 is a cross-sectional view taken along the line BB in FIG. 6 is an enlarged view of a main part of the cross-sectional view of FIG.
The first casing 1 and the second casing 2 are connected to each other via a hinge part 3 so as to be foldable with each other. A speaker 12, a battery lid 13, a protector 14, a sliding earphone cover 15 on one side, a communication connector cover 16, a charging terminal 17, and the like are provided. The second housing 2 is provided with a main display portion 21, a sub display window 22 on the back side, a camera 23, an illumination lamp 24, and the like. The protector 14 provided on the back side of the first housing 1 is made of an elastic body, and when performing non-contact data communication with a reader / writer which is an external device (not shown), the mobile phone is read by the reader / writer. It is provided so that it may be in contact with.

FIG. 7 shows a disassembled state of the first housing 1, and the first housing 1 is composed of a front case 41, a back case 42, and a middle case (shield case) 43 as shown. .
Inside the front case 41, a key sheet 44 and a keypad 45 are disposed so as to overlap each other and the middle case 43 that also serves as a shield case. A hinge cover portion 46 corresponding to the hinge cover 31 is formed on the front case 41. In the figure, 47 is a flexible printed circuit board and 48 is a logo plate. A microphone hole 49 is formed in a portion where the logo plate 48 of the front case 41 is pasted. A microphone (not shown) is attached to the back side of the microphone hole 49 of the front case 41.

Inside the back case 42, a main circuit board 51, a sub circuit board 52, and a holder 53 thereof are stacked and disposed between the middle case 43, a communication main antenna 54, a communication sub antenna 55, and a non-contact. A communication loop coil antenna 56, an antenna fixing member 57, a vibrator 58, the notification speaker 12 and the like are arranged.
A connector 52a of the sub circuit board 52 is connected to the lower surface of the main circuit board 51 having the connection terminal 51a for the microphone, and a non-contact communication IC 52b and a pair of spring contacts 52c are provided on the lower surface of the sub circuit board 52. (See FIG. 5 and FIG. 6). The terminal board 56a of the non-contact communication loop coil antenna 56 is elastically contacted with the spring contact 52c.
The communication main antenna 54 and the communication sub-antenna 55 are arranged so as to sandwich the non-contact communication loop coil antenna 56 and its antenna fixing member 57, and the vibrator 58 is a vibrator mounting portion 57 a formed on the antenna fixing member 57. Is installed.

FIG. 8 is an enlarged view of the back case 42, the non-contact communication loop coil antenna 56 and its antenna fixing member 57 in FIG. 7, and the non-contact communication loop coil antenna 56 is shown in FIGS. As shown in FIG. 11 and FIG. 12, the antenna fixing member 57 is arranged in the back case 42.
That is, as shown in FIG. 8, the non-contact communication loop coil antenna 56 has a rectangular frame shape. Specifically, the non-contact communication loop coil antenna 56 bundles three wires to be wound, and is wound three times on the terminal board 56a. It is connected so that it may become one loop antenna. The non-contact communication loop coil antenna 56 is disposed along the periphery of a battery housing recess 62 (see FIGS. 4 to 6) formed on the lower surface of the back case 42 for housing the battery 61.

As shown in FIG. 8, the antenna fixing member 57 has a rectangular frame shape that overlaps with the non-contact communication loop coil antenna 56.
The antenna fixing member 57 engages with a pair of engagement holes 63 formed on one surface of the outer peripheral wall of the battery housing recess 62 in the back case 42 inside one side located on the communication main antenna 54 side. It has a pair of engaging convex part 73 (refer FIG.15 and FIG.16). And it has the engagement convex part 74 engaged with the engagement convex part 64 formed in the side wall inner surface of the back case 42 in the outer side of the vibrator mounting part 57a (refer FIG. 13). Furthermore, an engagement hole 75 that engages with an engagement protrusion 65 formed on the other surface of the outer peripheral wall of the battery housing recess 62 in the back case 42 at the end of one side located on the communication sub-antenna 55 side. (See FIG. 14).

An engagement protrusion 66 that engages with the front case 41 is formed above the engagement protrusion 64 on the inner surface of the side wall of the back case 42.
Further, an opening 67 is formed in the back case 42 so as to penetrate to the battery housing recess 62 side. In the opening 67, a UIM card holder (connector) (not shown) provided on the lower surface side of the main circuit board 51 is disposed.

Accordingly, the antenna fixing member 57 is overlaid on the non-contact communication loop coil antenna 56 disposed along the periphery of the battery housing recess 62 in the back case 42 as shown in FIGS. 15 and 16. The engaging convex portion 73 is engaged with the engaging hole 63, the engaging convex portion 74 is engaged with the lower side of the engaging convex portion 64 as shown in FIG. 13, and the engaging convex portion 74 is engaged as shown in FIG. The engagement hole 75 is engaged with the mating convex portion 65 and is held in a fixed state.
Then, the middle case 43, the main circuit board 51, the sub circuit board 52 and the holder 53 are stacked on the back case 42, and the front case 41, the key sheet 44 and the keypad 45 are further placed on the middle case 43. And the first case 1 is assembled by inserting screws (not shown) from the back case 42 side and tightening them into the front case 41.

As described above, in the first housing 1, the rectangular frame-shaped loop coil antenna 56 is disposed along both side surfaces in the back case 42, that is, the loop coil antenna 56 is disposed around the battery housing recess 62. Since the antenna fixing member 57 having the same rectangular frame shape is fixed from above, the antenna fixing member 57 can suppress the shape variation after the loop coil antenna 56 is assembled over the entire circumference.
Therefore, stabilization of communication performance can be achieved.

In the above embodiment, the foldable mobile phone is used as the data communication device. However, the present invention is not limited to this, and may be a PDA or other portable electronic device.
Further, in the embodiment, the loop coil antenna is disposed along both side surfaces in the housing, but the loop coil antenna may be disposed so that at least a part of the conductive wire circulates along the side surface of the housing.
Furthermore, it is needless to say that other specific detailed structures can be appropriately changed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates a configuration of an embodiment to which the present invention is applied, and is a front perspective view in a state in which a foldable mobile phone is opened. FIG. 2 is a rear perspective view of the foldable mobile phone in the open state of FIG. 1. FIG. 2 is a front perspective view of the foldable mobile phone in FIG. 1 in a closed state. It is sectional drawing along the arrow AA of FIG. Similarly, it is sectional drawing which followed the arrow BB line of FIG. It is a principal part enlarged view of sectional drawing of FIG. It is a disassembled perspective view which shows the 1st housing | casing of FIG. It is a principal part enlarged view of the exploded perspective view of FIG. It is a disassembled perspective view which shows the state which has arrange | positioned the loop coil antenna of FIG. 8 in a housing | casing. Similarly, it is a front view which shows the state which has arrange | positioned the loop coil antenna in a housing | casing. FIG. 10 is a perspective view showing a state in which the loop coil antenna fixing member of FIG. 9 is attached in the housing. Similarly, it is a front view which shows the state which attached the loop coil antenna fixing member in the housing | casing. Similarly, it is sectional drawing which shows the state which attached the loop coil antenna fixing member in the housing | casing, and is sectional drawing along the arrow AA of FIG. Similarly, it is sectional drawing along the arrow BB line of FIG. Similarly, it is sectional drawing along the arrow CC line of FIG. Similarly, it is sectional drawing along the arrow DD line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st housing | casing 2 2nd housing | casing 3 Hinge part 11 Operation part 13 Battery cover 14 Protector 21 Display part 41 * 42 * 43 Case 52 Subcircuit board 52b IC52b for non-contact communication
52c Spring contact 56 Loop coil antenna 56a Terminal board 57 Antenna fixing member 61 Battery 62 Recess 63 Engagement hole 64/65 Engagement protrusion 73/74 Engagement protrusion 75 Engagement hole

Claims (2)

In a data communication apparatus having a loop coil antenna for performing non-contact data communication,
A data communication apparatus, wherein the loop coil antenna is disposed on an inner surface of a housing and fixed with a frame-shaped member from above. The housing is formed with a recess for storing a battery,
The data communication apparatus according to claim 1, wherein the loop coil antenna is disposed around the recess.

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