JP4828937B2 - Wireless terminal device - Google Patents

Description

  The present invention relates to a wireless terminal device such as a mobile phone, a PDA (Personal Digital Assistant), a notebook personal computer, or the like that has an antenna built in a housing.

  2. Description of the Related Art Recently, a cellular phone including a first housing, a second housing, and a hinge portion that rotatably couples the first housing and the second housing, and the housings are configured to be openable and closable. And portable wireless terminal devices such as PDAs having wireless functions have become widespread.

  By the way, in recent years, design has been required for a wireless terminal device, and with the miniaturization of an antenna, a first wireless terminal device is formed instead of the antenna that has been projected outside the housing. An antenna in which an antenna is arranged in a housing or a second housing has been proposed (see, for example, Patent Document 1).

In the wireless terminal device described in Patent Document 1, when the built-in antenna is arranged, the built-in antenna is arranged at the end of the case opposite to the connecting part that connects the two cases so that the radio wave is not blocked. It is supposed to be.
Japanese Utility Model Publication No. 4-110007

  However, as in the case of a foldable wireless terminal device, for example, it has a structure in which two housings can be overlapped in the closed state and the opposing surfaces of both housings can be exposed to the outside in the open state. As an antenna characteristic in the open state, there is a problem that it is difficult to obtain a performance equivalent to the antenna characteristic of a wireless terminal device having an external antenna.

  An object of the present invention is to provide a wireless terminal device capable of suppressing deterioration of antenna characteristics due to opening / closing of a terminal.

The wireless terminal device of the present invention is capable of opening and closing the first casing and the second casing that include at least a reference potential portion formed on the circuit board, and the ends of the first casing and the second casing. A connecting portion to be connected; a built-in antenna disposed in one of the first housing and the second housing and at an end opposite to the connecting portion; the first housing and the second housing; And a connection portion for electrically connecting the reference potential portions arranged in the housing, respectively, and a part of the reference potential portion provided in the first housing is formed at the end of the coupling portion, A part of the reference potential portion provided in the second housing is formed at the end on the connection portion side, and the first housing and the second housing are in the open state, and the connection portion side of the first housing A part of the reference potential portion formed at the end portion and a part of the reference potential portion formed at the end portion on the connecting portion side of the second casing are arranged to face each other. Together is, wherein the first housing, not covered with the circuit board and the circuit board, the shield case is electrically connected to the reference potential portion formed on the circuit board is provided, said first A part of the reference potential portion formed at the connection portion side end portion of the housing is disposed at the connection portion side end portion of the shield case, and the shield case constitutes another portion of the reference potential portion. To do.

The wireless terminal device of the present invention is capable of opening and closing the first casing and the second casing that include at least a reference potential portion formed on the circuit board, and the ends of the first casing and the second casing. A connecting portion to be connected; a built-in antenna disposed in one of the first housing and the second housing and at an end opposite to the connecting portion; the first housing and the second housing; And a connection portion for electrically connecting the reference potential portions arranged in the housing, respectively, and a part of the reference potential portion provided in the first housing is formed at the end of the coupling portion, A part of the reference potential portion provided in the second housing is formed at the end on the connection portion side, and the first housing and the second housing are in the open state, and the connection portion side of the first housing A part of the reference potential portion formed at the end portion and a part of the reference potential portion formed at the end portion on the connecting portion side of the second casing are arranged to face each other. Together we are, wherein the first housing, a speaker having a speaker sheet metal, the speaker sheet metal, forms a part of the reference potential unit.

Preferably, the speaker sheet metal has an annular shape .

Preferably, a part of the reference potential portion arranged in each of the first casing and the second casing is made of a metal layer formed inside the first casing or the second casing .

  According to Hon-Hachimachi, antenna characteristic deterioration due to opening and closing of the wireless terminal device can be suppressed.

  FIG. 1 is a front view showing an external appearance of a mobile phone (wireless terminal apparatus) 1 according to an embodiment of the present invention in an open state, and FIG. 3 (a) is a front view showing the appearance of the mobile phone 1 in a closed state, and FIG. 3 (b) is a rear view showing the appearance of the mobile phone 1 in a closed state. ) Is a side view showing the appearance of the cellular phone in a closed state, FIG. 4B is a cross-sectional view in the direction of arrows IVb-IVb in FIG. 3, and FIG. 4C is a part of FIG. FIG.

  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 case 2 and the transmitting case 3 are each formed in a substantially thin rectangular parallelepiped shape, and are superposed on each other in the closed state, and the outlines of the receiving case 2 and the sending case 3 substantially coincide when viewed from the other case side. It is like that. In the open state, the angle formed by the surfaces facing each other (front surfaces S1, S3) in the closed state is less than 180 degrees (for example, 160 degrees), and is slightly inclined with respect to each other.

  The receiving case 2 includes a front side case 6 on the side facing the transmitting case 3 in the closed state, a back side case 7 on the back side, and a panel 8 attached to the back side of the back side case 7. I have. The front side S1 facing the transmission case 3 in the closed state of the receiving case 2 is constituted by a front case 6, and the opposite back side S 2 is constituted by a rear case 7 and a panel 8. The front side case 6, the back side case 7, and the panel 8 are each formed of, for example, a non-conductive resin.

  A sound emitting hole 12 (FIG. 1) of a speaker 107 for communication (see FIG. 23) is opened in the front surface S1 of the receiving case 2. The receiving case 2 is provided with a main display unit 13 (FIG. 1) for displaying images and characters on the front surface S1, and a sub display unit 14 (FIG. 3 (a)) for displaying images and characters on the back surface S2. ing. The main display unit 13 and the sub display unit 14 are configured by a display device such as a liquid crystal display device or an organic EL display device. The panel 8 is translucent and also serves as a protective cover for the sub display unit 14.

  The transmitter case 3 includes a front-side case 9 on the side facing the receiver case 2 in the closed state, a back-side case 10 on the back side, and a lid 11 that covers the back side of the back-side case 10. It has. A front surface S3 facing the receiving housing 2 in the closed state of the transmitting housing 3 is constituted by a front case 9, and a back surface S4 on the opposite side is constituted by a back case 10 and a lid 11. The front side case 9, the back side case 10, and the lid 11 are each formed of, for example, a nonconductive resin.

  A sound collecting hole 16 (see FIG. 1) of a microphone 108 for calling (see FIG. 23) is opened in the front surface S3 of the transmission housing 3, and a sound emitting hole of a notifying speaker 74 (see FIG. 23) on the back surface S4 side. (Speaker hole) 17 (see also FIG. 8) is open to the side. The transmitter case 3 is provided with an operation unit 18 including various keys exposed on the front surface S3. The various keys are, for example, a dial key 18a, a cursor key 18b, a function key 18c, and an enter key 18d.

  Further, as shown in FIGS. 2 and 3, the transmission housing 3 includes an imaging module 20 whose imaging direction is the back S4 side and an IrDA communication unit 21 for infrared communication whose transmission direction is the back S4 side. And are provided. An imaging window 22 of the imaging module 20 and an infrared through hole 23 of the IrDA communication unit 21 are opened on the back surface S4 of the transmission housing 3. A frame 24 is disposed on the periphery of the photographing window 22. In addition, an exterior member 25 is disposed on the back surface S4 of the transmitter case 3 so as to surround the region where the photographing window 22 and the through hole 23 are disposed. The frame body 24 and the exterior member 25 are formed, for example, by plating a resin and have conductivity.

  As shown in FIG. 1 and FIG. 3A, the connecting portion 4 is formed with a notch 27 at the center of the end of the receiver case 2 and a protrusion 28 at the center of the end of the transmitter case 3. A projecting portion 28 is fitted to the cutout portion 27. The cutout portion 27 and the projecting portion 28 of the connecting portion 4 have openings 126 and 127 on contact surfaces that contact each other (see FIG. 5), and a shaft member (not shown) is provided in the openings 126 and 127. It is inserted and pivotally supported.

  FIG. 5 is an exploded perspective view of the mobile phone 1, and FIG. 6 is an exploded side view of the mobile phone 1. 5 and 6, some components such as the lid 11 are omitted.

  In the transmitter case 3, a circuit board 31, a shield case (case body) 32, and a flexible printed wiring board (FPC) 33 are provided between the front case 9 and the back case 10 from the back case 10 side. And a key sheet 34 are stacked and included.

  The circuit board 31 is composed of, for example, a printed wiring board based on a resin, and includes a first mounting surface MS1 on the front case 9 side and a second mounting surface MS2 on the back case 10 side (hereinafter simply referred to as a simple mounting surface MS2). It is called “mounting surface MS” and there is a case where they are not distinguished from each other. On the first mounting surface MS1 and the second mounting surface MS2, a plurality of various electronic components 36 such as an IC (see also FIG. 4B) are arranged, and a ground pattern layer 37 (second second) serving as a reference potential. A part of the mounting surface MS2 is shown). The electronic component 36 disposed on the first mounting surface MS1 is, for example, an electronic component that constitutes a high-frequency circuit for communication. Note that the electronic components provided in the receiver housing 2 such as the main display unit 13 and the sub display unit 14 are electrically connected to the circuit board 31 via a signal line 131 (see FIG. 22) inserted through the connection unit 4. It is connected.

  The shield case 32 is made of metal, for example, and has conductivity. The shield case 32 includes a main body 39 having a size and shape (for example, a rectangle) substantially the same as the circuit board 31 and an extending part 40 extending outside the mounting surface MS of the circuit board 31. . In addition, the main-body part 39 and the extension part 40 are formed by punching or bending from one sheet metal, for example, and are integrally formed.

  The main body 39 is formed in a substantially box shape having a concave side on the side facing the first mounting surface MS1 of the circuit board 31, and covers the electronic component 36 mounted on the first mounting surface MS1. It is attached (see FIG. 4B). Further, the main body 39 is formed with ribs 39b having the same pattern as the ground pattern layer 37 of the first mounting surface MS1 on the surface facing the first mounting surface MS1 (see FIG. 12). When the rib 39b abuts on the ground pattern layer 37, and a spring contact (not shown) provided on the ground pattern layer 37 abuts on a notch 39c formed in the rib 39b, the shield case 32 and the ground The pattern layer 37 is electrically connected.

  The extending part 40 extends from the edge part of the main body part 39 on the connecting part 4 side to the outside of the first mounting surface MS1. The extending part 40 extends so as to incline toward the first mounting surface MS1 side of the first mounting surface MS1 and the second mounting surface MS2, and the inclined surface 41 inclined with respect to the mounting surface MS is back. It is on the side case 10 side.

  In the FPC 33, a plurality of push switches (not shown) are arranged at positions corresponding to various keys such as the dial key 18a. The key sheet 34 is made of, for example, silicon rubber, and various keys are fixed to the front case 9 side of the key sheet 34. By pressing operations on various keys, the pressing switch of the FPC 33 is turned on via the key sheet 34. The ON signal of the pressing switch of the FPC 33 is output to the circuit board 31 via a connector (not shown).

  The imaging module 20 is fixed to the inclined surface 41 of the extending part 40. Specifically, it is as follows.

  FIG. 7 is a partially omitted cross-sectional view of the imaging module 20 and its periphery (in the direction of arrows VII-VII in FIG. 3B). Note that FIG. 7 is conceptual, and some members that are not in the same cross section are shown, and the shape and dimensions of the details are omitted. The imaging module 20 is mounted on the imaging substrate 43, the imaging substrate 44 to which the imaging device 43 is fixed, the imaging housing 46 that is fixed to the imaging substrate 44 and holds the lens group 45 and the like, and the imaging substrate 44. A control component 47 and a connector 48, a cover member 49 that covers the imaging housing 46, and a flexible printed wiring board (FPC) 50 (see FIG. 6).

  The image sensor 43 is configured by, for example, a CCD or a CMOS, and outputs an electrical signal corresponding to light received through the imaging window 22 and the lens group 45. The imaging substrate 44 is formed of, for example, a printed wiring board based on a resin. The imaging housing 46 is formed of, for example, a non-conductive resin, and is formed in a box shape that covers the imaging substrate 44. The imaging housing 46 and the imaging substrate 44 form a sealed space in which the imaging element 43 is accommodated. Further, the imaging substrate 44 constitutes a bottom surface BS of the imaging module 20 (a surface opposite to the light incident side).

  The control component 47 and the connector 48 are disposed on the bottom surface BS of the imaging board 44. The control component 47 is composed of, for example, an IC, and controls the operation of the image sensor 43 such as discharge of electric charge based on a signal from the control unit of the circuit board 31, and an image corresponding to an electric signal from the image sensor 43. Data (imaging signal) is generated and output to the control unit of the circuit board 31. The FPC 50 is electrically connected to the control component 47 and the imaging element 43 via the connector 48 and the imaging substrate 44. The FPC 50 is electrically connected to the circuit board 31, feeds power from the circuit board 31 to the image sensor 43, inputs a control signal from the circuit board 31 to the image sensor 43, and images from the image sensor 43 to the circuit board 31. The signal is output via the FPC 50.

  The cover member 49 is formed of, for example, a resin kneaded with conductive carbon particles, and has conductivity. The cover member 49 only needs to have conductivity on at least the surface, and is formed of metal, formed by applying a conductive paint to a resin, or formed by applying metal plating to a resin. Also good. The cover member 49 is an outline of the imaging module 20 and also functions as a shield member that surrounds the imaging element. The cover member 49 is generally formed in a hollow body having a rectangular cross section (see also FIGS. 9 and 11). One opening of the cover member 49 is larger than the cross section of the imaging housing 46, and the other opening is smaller than the cross section of the imaging housing 46. The imaging housing 46 is inserted into one opening having a large opening area of the cover member 49 from the light incident side and stored in the cover member 49, and is locked on the other opening side of the cover member 49. The cover member 49 covers the imaging element 43 by covering the imaging housing 46.

  As shown in FIGS. 5 to 7, a heat transfer sheet (elastic body) 52 is disposed on the inclined surface 41 of the extending portion 40. The heat transfer sheet 52 is, for example, a double-sided tape in which an adhesive is applied to both sides of a rubber sheet, and has elasticity and non-conductivity. The heat transfer sheet 52 has heat transfer properties, and its heat transfer coefficient is higher than that of the retained air.

  The imaging module 20 is placed on the inclined surface 41 with a heat transfer sheet 52 interposed between the bottom surface BS and the inclined surface 41. The heat transfer sheet 52 adheres to the bottom surface BS and the inclined surface 41 and is fixed by an adhesive.

  As shown in FIG. 6, an engaging portion 54 is formed in the imaging module 20, and the extending portion 40 is also formed by engaging the engaging portion 54 with a notch 55 formed in the extending portion 40. (See also FIG. 9). For example, the engaging portion 54 is integrally formed with the cover member 49, and extends from the edge of the side surface of the mobile phone 1 on the side of the rotation axis direction (the front side in FIG. 6) of the side surface of the cover member 49. Projecting in a plate shape so as to exceed the bottom surface BS of the imaging substrate 44 toward the 40 side. The notch 55 is formed by notching a side wall formed around the inclined surface 41 of the extending part 40. When the engaging portion 54 is fitted into the notch portion 55, the engaging portion 54 engages with the notch portion 55 in the direction orthogonal to the rotation axis of the mobile phone 1 (the left-right direction in FIG. 6), and the rotation shaft Engage with the edge of the inclined surface 41 in the direction.

  In the imaging module 20, an engaging portion 57 is formed on the distal end side (the left side in FIG. 6) of the extending portion 40 (see also FIG. 9), and the engaging portion 57 is engaged with the extending portion 40. Also fixed by. The engagement portion 57 is a plate-like extension portion 58 that extends from the side surface on the distal end side of the extension portion 40 of the cover member 49 to the extension portion 40 side so as to exceed the bottom surface BS of the imaging substrate 44. It is a nail | claw part which protrudes inside. The engaging portion 57 engages with the surface on the front side case 9 side at the tip of the extending portion 40, and prevents the imaging module 20 from coming off the extending portion 40 in the direction orthogonal to the inclined surface 41. The engaging portion 57 and the extending portion 58 are integrally formed with the cover member 49. In addition, since the extending part 58 is also in contact with the distal end side of the extending part 40 and the imaging module 20 is fixed to the extending part 40, it can be regarded as an engaging part.

  As shown in FIG. 5, the cover member 49 has an extended portion 60 formed so that the side surface facing the engaging portion 54 extends beyond the bottom surface BS of the imaging substrate 44 (see also FIG. 9). The extension part 60 is in contact with the side surface of the extension part 40 and fixes the imaging module 20 to the extension part 40. In addition, the extension part 60 can also be regarded as an engaging part. Since the extended portion 40 of the shield case 32 is surrounded by the engaging portion 54, the extended portion 58, and the extended portion 60 that are integrally formed with the cover member 49, the extended portion 40 is fitted and inserted into the cover member 49. You can also think that

  Note that the cover member 49 is electrically connected to the shield case 32 when the engaging portion 54, the extending portion 58, the engaging portion 57, the extending portion 60, etc. abut against the extending portion 40 of the shield case 32. It will be fixed in the state.

  As shown in FIG. 4B and FIG. 4C, the imaging module 20 is arranged with the side facing the second mounting surface MS2 of the circuit board 31 (the upper side in the drawing) as the imaging direction (light incident side). The bottom surface BS is inclined toward the mounting surface MS of the circuit board 31 and the imaging optical axis OA is inclined away from the circuit board 31 toward the imaging direction side. As a result, as shown in FIG. 2, the imaging direction of the imaging module 20 (indicated by the optical axis OA) is perpendicular to the receiving housing 2 and, consequently, perpendicular to the main display unit 13.

  Further, the first end BSa on the side of the bottom surface BS adjacent to the circuit board 31 is closer to the imaging direction than the second mounting surface MS2, and the second end BSb is opposite to the imaging direction from the first mounting surface MS1. It inclines with respect to the circuit board 31 so that it may become. An electronic component 62 is disposed in a gap formed between the first end BSa of the bottom surface BS and the circuit board 31. The electronic component is a chip resistor, for example.

  As shown in FIGS. 4B and 6, the FPC 50 is electrically connected to the imaging substrate 44 of the imaging module 20 via the connector 48, extends from the connector 48 along the bottom surface BS of the imaging module 20, and The circuit board 31 extends from the first end BSa onto the second mounting surface MS2.

  The FPC 50 has a connector 64 on a surface facing the second mounting surface MS2 in a portion extending on the second mounting surface MS2. On the other hand, the second mounting surface MS2 has a connector 65 (FIG. 6) at a position facing the connector 64. By connecting the connector 64 and the connector 65, the FPC 50 is electrically connected to the circuit board 31 at the second mounting surface MS2. The connectors 64 and 65 are electrically connected to each other by inserting and fitting at least part of one connector into the other connector in the facing direction of the FPC 50 and the second mounting surface MS2.

  The cover member 49 has a tongue piece (projection piece) 66 (see also FIGS. 5, 9, and 11) extending onto the second mounting surface. The tongue piece 66 extends in parallel to the second mounting surface MS2 when the imaging module 20 is fixed to the extending portion 40 of the shield case 32, and the tongue piece 66 and the second mounting surface MS2 The distance is formed so as to be substantially equal to the total thickness of the connector 64, the connector 65, and the FPC 50 when the connector 64 and the connector 65 are connected.

  As shown in FIGS. 4B and 5, a recess 68 is formed inside the protrusion 28 of the connecting portion 4. The recess 68 is formed to have a width in the rotation axis direction larger than that of the extending portion 40 of the shield case 32 and the imaging module 20, and a part of the extending portion 40 is formed inside the protruding portion of the recess 68. It has entered so as to exceed the position of the front surface S3 of the body 3.

  The recess 68 houses a motor 69 for notifying an incoming call by vibration. The motor 69 is fitted and fixed between a plurality of projecting portions 70 (see also FIG. 9) projecting from the extending portion 40 into the recessed portion 68.

  Below, the structure for reducing the influence of the static electricity which penetrate | invades into the inside of a housing | casing from opening of the sound emission hole 17 grade | etc., Is demonstrated.

  FIG. 8 is an enlarged perspective view showing the vicinity of the sound emission hole 17 of the back side case 10 of the transmitter housing 3, and FIG. 9 is an exploded perspective view with a part omitted around the sound emission hole 17.

  In the transmitter case 3, a frame 24, an exterior member 25, and a speaker sheet metal 73 (FIG. 9) are provided as members for inducing static electricity that enters from the case opening. The speaker metal plate 73 is electrically connected to the ground pattern layer 37 of the circuit board 31 via the cover member 49 and the shield case 32, and the frame body 24 is connected to the circuit board 31 via the cover member 49 and the shield case 32. The exterior member 25 is electrically connected to the ground pattern layer 37 of the circuit board 31 by contacting the speaker sheet metal 73. Details will be described below.

  As shown in FIG. 8, the rear case 10 is formed with a protruding portion 10 a that rises to the rear side at the end where the sound emitting hole 17 is provided (the end on the side connected to the receiving housing 2). Yes. The sound emitting hole 17 is open to a slope formed by chamfering the corners of the back surface and the side surface of the protruding portion 10a, and communicates with the outside of the housing.

  As shown in FIG. 9, speaker holding recesses 72 having a recess on the inner side of the casing and a sound emitting hole 17 are provided on both sides in the width direction of the casing on the inner side of the casing near the protruding portion 10 a of the rear case 10. Is formed. No opening is provided in the bottom surface of the speaker holding recess 72 (the back side of the back surface S4 of the back side case 10), and the sound emitting hole 17 opens to the side surface of the speaker holding recess 72 and communicates with the inside of the speaker holding recess 72. is doing.

  A speaker sheet metal 73 is disposed in the speaker holding recess 72, and a speaker 74 is disposed thereon. The speaker holding recess 72 forms a sound introduction space SP that guides the sound output from the speaker 74 to the sound emission hole 17.

  The speaker sheet metal 73 is formed in an annular shape and has a shape that opens at least a part of the sound emitting surface 74 a of the speaker 74. The speaker sheet metal 73 is fitted in the speaker holding recess 72 and is disposed in contact with a mounting surface 76 formed on the speaker 74 side of the sound output hole 17 in the speaker holding recess 72. In other words, the speaker metal plate 73 is disposed between the sound emission hole 17 and the speaker 74. The mounting surface 76 is provided over the entire circumference of the speaker holding recess 72. That is, the speaker metal plate 73 is in contact with the inner surface of the housing that forms the speaker holding recess 72 over the entire circumference of the speaker holding recess 72, and the inner surface of the housing that forms the speaker holding recess 72 from the sound emission hole 17 to the speaker 74. The static electricity flowing along is absorbed by the speaker metal plate 73.

  The speaker 74 is formed in a substantially disk shape, for example, and is fitted and inserted into the speaker holding recess 72 so that the sound emitting surface 74a faces the back side surface of the back surface S4 of the back side case 10. The speaker 74 has an electrode part 74b on the inner side of the casing on the outer periphery. The electrode part 74b is electrically connected to the circuit board 31, and the speaker 74 receives power from the circuit board 31, and vibrates the diaphragm according to the electric signal from the circuit board 31, and emits sound from the sound emitting surface 74a. .

  A recess 77 for fitting and inserting the imaging module 20 at a position sandwiched between the two speaker holding recesses 72 is provided on the inner side of the rear side case 10 in the vicinity of the protrusion 10a. It is formed by the wall part 78 which protrudes from and the surface of the end part side of the back side case 10. That is, the imaging module 20 is an electronic component that is arranged adjacent to the speaker 74. The wall 78 can also be regarded as forming the speaker holding recess 72.

  FIG. 10 is a perspective view showing an outline of a conduction method between the exterior member 25 and the speaker sheet metal 73. A protruding portion 80 (see also FIG. 9) that protrudes toward the back side case 10 is formed on the back side case 10 side of the exterior member 25 (upper side in the drawing of FIG. 10), and the protruding portion 80 is the back side case. The exterior member 25 is electrically connected to the speaker sheet metal 73 by being inserted into the through hole 81 (see FIG. 14) formed in 10 and contacting the speaker sheet metal 73.

  FIG. 11 is a perspective view showing an outline of a conduction method between the speaker sheet metal 73 and the cover member 49. The cover member 49 is disposed between the speaker metal plates 73, and the speaker metal plate 73 extends to the cover member 49 side so as to exceed the wall portion 78. In other words, the speaker metal plate 73 extends from the speaker holding recess 72. The speaker plate 73 is electrically connected to the cover member 49 when the extension portion 83 abuts against the side surface of the cover member 49.

  FIG. 12 is a perspective view showing an outline of a conduction method between the cover member 49 and the shield case 32. As described above, the cover member 49 is placed on the extended portion 40 of the shield case 32, and the cover member 49 is configured such that the extended portion 60 and the like come into contact with the extended portion 40 of the shield case 32, thereby Is electrically conducted.

  FIG. 13 is an exploded perspective view of the speaker sheet metal 73 and members attached to the speaker sheet metal 73. A mesh sheet 86 and an elastic member 87 are laminated on the speaker sheet metal 73 on the speaker 74 side (the lower side in the drawing).

  The speaker metal plate 73 has a main body 73a formed in a substantially circular shape. However, the side opposite to the extending portion 83 of the main body portion 73a is formed in a straight line. The extending portion 83 has an outer edge formed in a substantially rectangular shape. The extending portion 83 extends substantially parallel to the main body portion 73a, and then curves to the sound emission hole 17 side (upper side in the drawing). In addition, a spring portion 84 formed so as to cut out the extending portion 83 into a rectangle is formed inside the extending portion 83. The spring portion 84 is bent from the main body portion 73a to the upper side of the paper surface and then bent to the lower side of the paper surface so as to form a peak portion protruding from the main body portion 73a to the upper side of the paper surface. In addition, the main-body part 73a, the extension part 83, and the spring part 84 are formed by punching or bending from one sheet metal, for example.

  The mesh sheet 86 has substantially the same shape and width as the outline of the outer peripheral side edge of the main body 73a of the speaker sheet metal 73, and is affixed to the speaker sheet metal so as to close the opening 73b of the speaker sheet metal 73. The speaker sheet metal 73 and the mesh sheet 86 are fixed by, for example, an adhesive before the speaker sheet metal 73 is attached to the back side case 10. Since the speaker sheet metal 73 is inserted into the speaker holding recess 72 and the opening 73b of the speaker sheet metal 73 forms a part of the sound guide space SP, the mesh sheet 86 closes the sound guide space SP. In addition, since the sound introduction space SP that guides the sound from the speaker 74 to the sound emission hole 17 is blocked, the sound emission hole 17 is considered to be blocked by the mesh sheet 86 when viewed from the speaker 74. be able to.

  The mesh sheet 86 is a sheet formed by weaving, for example, a wire rod 86a. There is a gap 86b between the adjacent wire rods 86a, which allows sound from the speaker 74 to pass therethrough and is larger than the gap 86b. It is possible to prevent the passage of garbage. As the weaving format, an appropriate one may be selected as long as the gap 86b communicates from one surface of the mesh sheet 86 to the other surface. Further, the mesh sheet 86 may be configured by opening a plurality of holes in the sheet like punching metal. The material of the mesh sheet 86 may be appropriately selected from metals, resins, and materials obtained from animals and plants.

  The elastic member 87 is formed of rubber, for example, and has substantially the same shape and width as the main body 73a of the speaker metal plate 73. The elastic member 87 and the mesh sheet 86 are fixed with an adhesive before the speaker sheet metal 73 is attached to the rear case 10, for example. As shown in FIG. 15, the speaker 74 is placed on the elastic member 87 and protected from an impact applied to the mobile phone 1.

  14 is an exploded perspective view showing the periphery of the extending portion 83, and FIG. 15 is a cross-sectional view in the direction of arrows XV-XV in FIG. However, the lower central portion of the speaker sheet metal 73 is shown partially broken.

  A notch 78 a for extending the extension 83 from the speaker holding recess 72 is formed in the wall 78 that separates the arrangement position of the imaging module 20 and the arrangement position of the speaker 74. A through-hole 81 for inserting the protruding portion 80 of the exterior member 25 is formed on the speaker holding recess 72 side of the remaining portion 78b sandwiched between the two notches 78a of the wall portion 78.

  When the protruding portion 80 of the exterior member 25 is inserted into the through-hole 81 and the speaker sheet metal 73 is mounted on the mounting surface 76 of the speaker holding recess 72, the distal end portion of the extending portion 83 of the speaker sheet metal 73 and the spring portion 84. Between the lower portion of the remaining portion 78b of the wall portion 78 and the protruding portion 80. At this time, the spring portion 84 comes into contact with the protruding portion 80 by the biasing force of the spring portion 84. Thereby, the exterior member 25 is electrically connected to the speaker sheet metal 73.

  The protruding portion 80 of the exterior member 25 is fitted into the through hole 81 and contributes to positioning and fixing of the exterior member 25 to the back side case 10. Further, the extending portion 83 and the spring portion 84 of the speaker metal plate 73 also contribute to positioning and fixing the speaker metal plate 73 to the back side case 10 by sandwiching the wall portion 78 and the protruding portion 80.

  When the imaging module 20 is inserted into the recess 77, the distal end portion of the extending portion 83 of the speaker metal plate 73 is sandwiched between the cover member 49 of the imaging module 20 and the lower portion of the remaining portion 78 b of the wall portion 78. At this time, the extension part 83 is pushed toward the wall part 78 by the cover member 49 and elastically deforms. In other words, the extending portion 83 functions as a leaf spring and abuts on the cover member 49 by its urging force. As a result, the speaker sheet metal 73 is electrically connected to the cover member 49.

  FIG. 16 is an exploded perspective view showing a conduction method between the frame body 24 attached to the surface of the back side case 10 and the cover member 49 of the imaging module 20.

  Around the imaging module 20, the frame 24, the protective cover 89, the back side case 10, the conductive mesh 90, the elastic sheet 91, and the cover member 49 of the imaging module 20 are stacked from the outside of the housing.

  The frame body 24 is formed in a cylindrical shape having an end surface 24a in which an opening is formed. The protective cover 89 is made of translucent resin or glass, and is fitted and inserted into the frame body 24 and locked by the end face 24a. The rear case 10 is formed with a recess 93 (see FIG. 5) having a recess on the outside of the housing, and the imaging window 22 is opened in the recess 93. A convex portion 93 ′ is formed on the inner side of the housing by the back side surface of the concave portion 93. The frame body 24 is fitted and inserted into the concave portion 93 and is fixed to the back side case 10 with an adhesive or the like.

  The elastic sheet 91 is made of rubber, for example, and is fixed to the rear case 10 with an adhesive or the like. The imaging module 20 is protected from an impact applied to the mobile phone 1 by being held by the back case 10 via the elastic sheet 91.

  A through hole 95 is opened in the convex portion 93 '(see also FIG. 9). On the other hand, an extension 96 that can be inserted into the through hole 95 is formed in the frame 24. The extending portion 96 is formed integrally with the frame body 24, for example. The extending portion 96 is inserted through the through-hole 95 and positioned inside the housing, and the conductive mesh 90 is disposed on the extending portion 96, and the notched portion 91 a in which the conductive mesh 90 is formed in the elastic sheet 91 is provided. The frame 24 is electrically connected to the cover member 49 by contacting the cover member 49 via the cover member 49.

  The conductive mesh 90 is for preventing an impact from being transmitted from the extending portion 96 to the cover member 49 while reliably conducting the extending portion 96 and the cover member 49. It is formed by weaving a wire made of and has elasticity. Alternatively, the conductive mesh 90 may be rolled to form a three-dimensional shape to obtain an urging force by three-dimensional elastic deformation. Alternatively, the conductive mesh 90 may be omitted and the extending portion 96 may be in direct contact with the cover member 49.

  Hereinafter, a structure for improving the antenna gain will be described.

  17 to 20 are diagrams showing the main part of the cellular phone 1 related to the antenna gain by removing various members such as the front case 6 and the transmitter case 3 of the receiver case 2, and FIG. 18 is a rear view, FIG. 19 is a perspective view seen from the front side, and FIG. 20 is a perspective view seen from the rear side.

  The receiving housing 2 and the transmitting housing 3 are configured such that, in the open state, the end portions 2a and 3a (see FIG. 2) on the side of the connecting portion 4 are arranged in an overlapping state. Therefore, the speaker 74 and the speaker sheet metal 73 provided at the end 3a of the transmitting case 3 are disposed opposite to the end 2a of the receiving case 2 in the open state.

  An antenna 105 is provided at the end of the circuit board 31 opposite to the connecting portion 4. The antenna 105 is fed from the circuit board 31 and converts the received radio wave into an electrical signal and outputs the electric signal to a high-frequency circuit (electronic component 36 in FIG. 4) provided on the first mounting surface MS1 of the circuit board 31. At the same time, the electric signal output from the high-frequency circuit is converted into a radio wave and transmitted. The antenna 105 is configured as a built-in antenna provided in the transmitter case 3 and in the end 3 b (see FIG. 2) on the opposite side to the connecting portion 4.

  As described above, the shield case 32 has the main body portion 39 having a shape substantially the same as the circuit board 31 and the extending portion 40 extending from the circuit board 31 to the protruding portion 28 of the connecting portion 4. The arrangement area is a range indicated by a dotted line L1 in FIG. Further, as described above, the shield case 32 is electrically connected to the ground pattern layer 37 of the circuit board 31 and functions as a reference potential portion of the transmitter case 3. Note that the cover member 49, the frame body 24, and the exterior member 25 of the imaging module 20 also function as reference potential portions within a range overlapping with the extended portion 40 or around the extended portion 40.

  The inner surface of the end portion 2a of the receiver case 2 forming the cutout portion 27 of the connecting portion 4, more specifically, the inner surface of the end portion 7a of the rear case 7 constituting the end portion 2a (dotted line in FIG. 17). In a region indicated by L2, a conductive layer 120 is formed by applying a conductive paint or metal deposition. A circuit board 121 (FIG. 17) for driving and controlling the main display unit 13 and the sub display unit 14 is provided between the main display unit 13 and the sub display unit 14 inside the receiver case 2. The conductive layer 120 is electrically connected to a ground pattern layer 122 (only part of which is shown in FIG. 17) of the circuit board 121 via a signal line (not shown) and functions as a reference potential portion of the receiver housing 2. is doing.

  In addition, the circuit board 121 is comprised by the printed wiring board based on resin like the circuit board 31, for example. Further, the inner surface of the end portion on the side of the connecting portion 4 of the front case 6 of the receiver case 2 is also electrically connected to the ground pattern layer 122 of the circuit board 121 and functions as a reference potential portion of the receiver case 2. A conductive layer may be provided.

  As shown in FIG. 17, only the shield case 32 (dotted line L <b> 1) and the conductive layer 120 (dotted line L <b> 2) of the receiver housing 2, the reference potential portion of the receiver housing 2 and the reference potential portion of the transmitter housing 3. Does not overlap in the open state. However, as described above, the speaker sheet metal 73 is disposed on both sides of the extended portion 40, and the speaker sheet metal 73 is electrically connected to the shield case 32 via the cover member 49 of the imaging module 20. The reference potential portion of the transmitter case 3 is expanded by the speaker metal plate 73 in the width direction of the connecting portion 4 (a direction perpendicular to the arrangement direction of the two cases in the open state) (also a dotted line L3 in FIG. 18). The reference potential portion of the receiver case 2 and the reference potential portion of the transmitter case 3 are at least partially formed at both ends in the width direction of the end portion on the connection portion 4 side and face each other in the open state. Will do.

  FIG. 21 is a perspective view illustrating a method for connecting the speaker 74 and the circuit board 31. The electrode portion 74b of the speaker 74 is provided at a position on the circuit board 31 side on the outer periphery of the substantially disk-shaped speaker 74, and has a contact on the circuit board 31 side (opposite to the sound emitting surface 74a).

  On the other hand, a power supply terminal 124 that protrudes from the second mounting surface MS2 of the circuit board 31 to the speaker 74 side is provided at the end of the circuit board 31 on the connection part 4 side. The power supply terminal 124 includes, for example, a coil spring that urges a contact point in contact with the electrode portion 74 b in a direction orthogonal to the circuit board 31.

  The speaker 74 is disposed in the speaker holding recess 72 of the back side case 10, and the circuit board 31 and the shield case 32 are placed thereon, whereby the electrode portion 74b and the power supply terminal 124 are connected.

  As described above, the electrode 74 b of the speaker 74 is provided on the periphery of the speaker 74 and the power supply terminal 124 of the circuit board 31 is provided and connected to the periphery of the circuit board 31, so that the speaker 74 is not overlapped with the circuit board 31. As a result, the speaker sheet metal 73 positioned in the speaker holding recess 72 and the speaker 74 can be arranged at a position that does not overlap the circuit board 31. As a result, it is easy to dispose the speaker sheet metal 73 at both ends in the width direction of the connecting portion 4, that is, to expand the reference potential portion.

  FIG. 22 is an exploded perspective view of the connecting portion 4. The cutout portion 27 of the receiver case 2 and the protruding portion 28 of the transmitter case 3 are axially formed in an opening portion 126 (see FIG. 5) that opens to the cutout portion 27 and an opening portion 127 that opens to the protrusion portion 28. These members are connected to each other so as to be rotatable. Specifically, the first hinge 128 is inserted into the opening 126 and the opening 127 on the left side of the drawing, and the second hinge 129 is inserted into the opening 126 and the opening 127 on the right side of the drawing.

  The first hinge 128 is formed in a substantially cylindrical shape as a whole. The first hinge 128 includes a reception side portion 128a that is inserted into the opening 126 of the receiving housing 2 in a non-rotatable manner, and a transmission side portion 128b that is inserted into the opening 127 of the transmitting housing 3 in a non-rotatable manner. And have. The reception side portion 128a and the transmission side portion 128b are rotatable with respect to each other, and a mechanism for generating a click feeling is provided inside.

  The outer peripheral portion of the reception side portion 128a and the outer peripheral portion of the transmission side portion 128b of the first hinge 128 are made of, for example, metal and have conductivity, and are in contact with each other and are conductive. The outer periphery of the reception side portion 128a is electrically connected to the ground pattern layer 122 of the circuit board 121 via a signal line (not shown), and the first hinge 128 functions as a reference potential portion of the reception housing 2. ing. Further, the transmission side portion 128b has a length that protrudes from the opening 127 to the vicinity of the center of the protrusion 28 into the protrusion 28.

  Therefore, the reference potential portion of the receiving housing 2 is extended to the center in the width direction of the end portion on the connecting portion 4 side by the first hinge 128. As a result, at least a part of the reference potential portion of the receiver case 2 and the reference potential portion of the transmitter case 3 (the extended portion 40 of the shield case 32) is the central portion in the width direction of the end portion on the connecting portion 4 side. And are opposed to each other in the open state. In addition, when combined with the above-described speaker sheet metal 73 and the conductive layer 120 of the receiving housing 2 facing each other, at least a part of the reference potential portion of the receiving housing 2 and the reference potential portion of the transmitting housing 3 is They are respectively formed in the entire width direction of the end portion on the connecting portion 4 side and face each other in the open state.

  The second hinge 129 includes a receiving side portion 129a that is inserted into the opening 126 of the receiving case 2 in a non-rotatable manner, and a transmitting side portion 129b that is rotatably inserted into the opening 127 in the sending case 3 have. The part located at the opening 126 of the reception side part 129a and the transmission side part 129b are formed in a substantially cylindrical shape. A signal line (connection portion) 131 that electrically connects the circuit board 121 of the receiver housing 2 and the circuit board 31 of the transmitter housing 3 is inserted into the cylindrical shape. The ground pattern layer 122 of the substrate 121 and the ground pattern layer 37 of the circuit board 31 are also electrically connected to each other.

  The signal line 131 is, for example, a thin coaxial cable in which a copper wire is covered with an outer skin of an insulator. A receiving side portion 129 a of the second hinge 129 is provided with a semi-cylindrical positioning portion that guides the signal line 131 into the receiving housing 2. The second hinge 129 is made of, for example, metal to provide conductivity, and the receiving side portion 129a of the second hinge 129 and the ground pattern layer 122 of the circuit board 121 of the receiving housing 2 are electrically connected. Good.

  FIG. 23 is a block diagram showing an example of the configuration of the signal processing system of the mobile phone 1. The CPU 101 and the memory 102 are configured by, for example, an IC, and function as a control unit that performs predetermined calculations based on signals from various units such as the operation unit 18 and controls various units such as the image processing unit 103.

  The radio wave communication processing unit 104 is configured to include a high frequency circuit, and modulates various data such as audio data and image data processed by the CPU 101 to perform radio communication using radio waves, via the antenna 105. Send. The radio wave communication processing unit 104 demodulates a signal received via the antenna 105 and outputs the demodulated signal to the CPU 101.

  The IrDA communication processing unit 110 modulates various data such as audio data and image data processed by the CPU 101 and transmits the data via the light emitting / receiving element 111 in order to perform wireless communication using infrared rays. Further, the IrDA communication processing unit 110 demodulates the signal received through the light emitting / receiving element 111 and outputs the demodulated signal to the CPU 101. Transmission / reception by the light emitting / receiving element 111 is performed through the through hole 23.

  The voice processing unit 106 converts voice data from the CPU 101 into a voice signal and outputs the voice signal to the speaker 107 for calling and the speaker 74 for notifying incoming calls. Also, the audio processing unit 106 converts the audio signal from the microphone 108 into audio data and outputs it to the CPU 101.

  The image processing unit 103 converts the image data from the CPU 101 into an image signal and outputs the image signal to the main display unit 13 and the sub display unit 14. Further, the imaging signal (image data) output from the imaging module 20 is converted into image data of a predetermined format and output to the CPU 101. Alternatively, the imaging signal output from the imaging module 20 is converted into an image signal and output to the main display unit 13.

  In the mobile phone 1, when imaging is performed by the imaging module 20, image data captured by the imaging module 20 is displayed on the main display unit 13 with a predetermined number of frames. Then, the electronic shutter or the mechanical shutter is released by a pressing operation on a key functioning as a release button, for example, the enter key 18d (see FIG. 1), and image data captured at that time is stored in the memory 102 or an external storage device (not shown). Remembered.

  In the above embodiment, a part of the reference potential portion (conductive layer 120) provided in the receiving case 2 is formed at the end portion 2a on the connection portion 4 side, and the reference potential portion provided in the sending case 3 is also provided. A part (speaker sheet metal 73) is formed on the connecting portion 4 side end portion 3a, and the receiving case 2 and the transmitting case 3 are in an open state, and the connecting portion 4 side ends 2a and 3a are overlapped. And a reference potential portion formed at the connection portion 4 side end portion 3a of the transmission housing 3 and a part of the reference potential portion formed at the connection portion 4 side end portion 2a of the reception case 2. The antenna gain is improved because it is opposed to a part of the antenna. That is, by expanding the ground to the periphery of the connecting portion 4, the ground surface seen from the antenna becomes stronger, it is possible to easily flow a high-frequency current over a wide range of the housing, and the grounds of both housings are capacitively coupled. Therefore, the flow of high-frequency current from the transmitting housing 3 to the receiving housing 2 can be further improved, and the antenna gain is improved. In addition, by arranging a part of the reference potential portion of each case over the entire width direction of the connecting portion side end of both cases, the flow of high-frequency current in the open state can be improved, and the antenna gain Can be further enhanced.

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

  The wireless terminal device to which the present invention is applied is not limited to a mobile phone as long as it has two housings each having a reference potential portion. For example, a notebook computer or PDA may be used.

  The two casings can be connected as long as the casings can move between a closed state where the two casings overlap and an open state where the overlap is smaller than the closed state. It is not limited to a formula. For example, a so-called revolver type or slide type may be used. As shown in FIG. 24, in the revolver-type or slide-type wireless terminal device 201, the end portion 202a of the first housing 202 and the end portion 203a of the second housing 203 are cut to form a connecting portion 204. Since the notch portion is not formed in 202a or 203a, the reference potential portion 205 provided in the first housing 202 and the reference potential portion 206 provided in the second housing 203 are connected to the end portion 202a on the connecting portion 4 side, 203a can be formed across the entire width direction of 203a. Further, a reference potential portion 205 provided in the first housing 202 and a reference potential portion 206 provided in the second housing 203 are formed at the center in the width direction of the end portions 202a and 203a on the connecting portion 4 side. Can be arranged opposite each other.

  The reference potential portion included in each case may be any circuit board provided in each case, or any conductive member that is electrically connected to the ground layer. It is not limited to the metal layer deposited inside the body. For example, an exterior panel provided on the surface of the housing may be used.

The front view which shows the mobile telephone of one Embodiment of this invention in an open state. FIG. 3 is a side perspective view showing the mobile phone of FIG. 1 in an open state. The front view and back view which show the mobile telephone of FIG. 1 in a closed state. The side view and sectional drawing which show the closed state of the mobile telephone of FIG. The disassembled perspective view of the mobile telephone of FIG. The exploded side view of the mobile telephone of FIG. Sectional drawing which shows the imaging module of the mobile telephone of FIG. The perspective view which shows the imaging module periphery of the mobile telephone of FIG. The disassembled perspective view which shows the imaging module periphery of the mobile telephone of FIG. The perspective view which shows the outline of the conduction | electrical_connection method of the exterior member and speaker sheet metal of the mobile telephone of FIG. The perspective view which shows the outline of the conduction | electrical_connection method of the speaker sheet metal and cover member of the mobile telephone of FIG. The perspective view which shows the outline of the conduction | electrical_connection method of the cover member and shield case of the mobile telephone of FIG. The disassembled perspective view of the member attached to the speaker sheet metal and speaker sheet metal of the mobile telephone of FIG. The disassembled perspective view which shows the conduction | electrical_connection method of the speaker sheet metal of the mobile telephone of FIG. Sectional drawing which shows the conduction | electrical_connection method of the speaker sheet metal of the mobile telephone of FIG. The disassembled perspective view which shows the conduction | electrical_connection method in the imaging | photography window periphery of the mobile telephone of FIG. The front view which shows the principal part of the mobile telephone 1 regarding the antenna gain of the mobile telephone of FIG. The rear view which shows the principal part of the mobile telephone 1 regarding the antenna gain of the mobile telephone of FIG. The front side perspective view which shows the principal part of the mobile telephone 1 regarding the antenna gain of the mobile telephone of FIG. The back side perspective view which shows the principal part of the mobile telephone 1 regarding the antenna gain of the mobile telephone of FIG. The perspective view explaining the connection method of the speaker of the mobile telephone of FIG. The disassembled perspective view of the connection part of the mobile telephone of FIG. The block diagram which shows the structure of the signal processing system of the mobile telephone of FIG. The modification of the radio | wireless communication terminal to which this invention is applied.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Mobile telephone (wireless communication terminal), 2 ... Reception housing | casing (1st housing | casing), 3 ... Transmission housing | casing (2nd housing | casing), 4 ... Connection part, 31 ... Circuit board, 37 ... Ground pattern layer (Reference potential part), 73 ... speaker sheet metal (reference potential part), 105 ... antenna, 120 ... conductive layer (reference potential part), 121 ... circuit board, 122 ... ground pattern layer (reference potential part), 131 ... signal line (Connection part).

Claims (4)

A first housing and a second housing having at least a reference potential portion formed on a circuit board;
A connecting portion for connecting the ends of the first housing and the second housing so as to be openable and closable;
A built-in antenna disposed in one of the first housing and the second housing and at an end opposite to the connecting portion;
A connecting portion for electrically connecting the reference potential portions disposed in the first casing and the second casing, respectively.
A part of the reference potential part provided in the first housing is formed at the connecting part side end, a part of the reference potential part provided in the second housing is formed at the connecting part side end, and The first casing and the second casing are in an open state, and a part of the reference potential portion formed at the connecting portion side end of the first casing and the connecting portion side end of the second casing together are oppositely disposed from the portion of the reference potential portion formed, wherein the first housing, not covered with the circuit board and the circuit board, the electrical reference potential portion formed on the circuit substrate A shield case that is connected
A part of the reference potential portion formed at the connecting portion side end of the first housing is disposed at the connecting portion side end of the shield case.
The wireless terminal device, wherein the shield case constitutes another part of the reference potential section. A first housing and a second housing having at least a reference potential portion formed on a circuit board;
A connecting portion for connecting the ends of the first housing and the second housing so as to be openable and closable;
A built-in antenna disposed in one of the first housing and the second housing and at an end opposite to the connecting portion;
A connecting portion for electrically connecting the reference potential portions disposed in the first casing and the second casing, respectively.
A part of the reference potential part provided in the first housing is formed at the connecting part side end, a part of the reference potential part provided in the second housing is formed at the connecting part side end, and The first casing and the second casing are in an open state, and a part of the reference potential portion formed at the connecting portion side end of the first casing and the connecting portion side end of the second casing The first casing is provided with a speaker having a speaker sheet metal, and the speaker sheet metal constitutes a part of the reference potential part. A wireless terminal device.   The wireless terminal device according to claim 2, wherein the speaker sheet metal has an annular shape.   A part of the reference potential portion disposed in each of the first casing and the second casing is formed of a metal layer formed inside the first casing or the second casing. Item 4. The wireless terminal device according to any one of Items 1 to 3.

Images