JP4926904B2 - Communication equipment - Google Patents

Description

  The present invention relates to a communication device having an antenna.

In recent years, in a mobile phone as a communication device, an antenna is housed and disposed inside a housing for reasons such as design.
As a mobile phone in which an antenna is housed and disposed in a housing, a mobile phone having a housing, a first circuit board disposed in the housing, and an antenna disposed in the first circuit board is proposed. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 11-31909

  However, in the mobile phone of Patent Document 1, since the antenna is arranged on the first circuit board, there is a problem that the mounting area on the first circuit board is reduced. Further, since the antenna is disposed in the vicinity of the ground pattern formed on the first circuit board and the electronic component to be mounted, there is a problem that the performance of the antenna is deteriorated.

  In view of the above problems, an object of the present invention is to provide a communication device capable of suppressing deterioration in antenna performance while suppressing a decrease in the mounting area of the first circuit board based on the mounting of the antenna.

  The present invention provides a casing, a first circuit board disposed in the casing, a case member attached to the first circuit board, a casing member, and a power supply from the first circuit board. And an antenna.

  Further, it is preferable that an electronic component electrically connected to the first circuit board or a second circuit board on which the electronic component is mounted is disposed on the case member.

  In the case member, it is preferable that the antenna is disposed on one side of the case member and the electronic component or the second circuit board is disposed on the other side.

  The antenna is preferably disposed to face the first circuit board.

  The antenna includes an elastic deformation portion that is disposed on the first circuit board side and is elastically deformed to be in contact with the first circuit board, and has an elastic deformation portion that is in contact with the first circuit board. It is preferable that power is supplied from the first circuit board.

  According to the present invention, a first circuit board, a case member attached to the first circuit board, and an antenna disposed on the case member and fed from the first circuit board are provided for mounting the antenna. The reduction of the mounting area of the first circuit board based on the antenna is further suppressed, and further, the antenna and the ground pattern formed on the first circuit board and the electronic components to be mounted are separated from each other. Equipment is provided.

The best mode for carrying out the present invention will be described below with reference to the drawings.
With reference to FIG. 1, a basic structure of a mobile phone 1 as a communication device will be described. FIG. 1 shows an external perspective view of the cellular phone 1 in an opened state.

  As shown in FIG. 1, the mobile phone 1 includes an operation unit side body 2 and a display unit side body 3 as a housing. The operation unit side body 2 and the display unit side body 3 are connected so as to be openable and closable via a connecting part 4 having a hinge mechanism. Specifically, the upper end portion of the operation unit side body 2 and the lower end portion of the display unit side body 3 are connected via a connecting portion 4. Thereby, the mobile phone 1 is configured to be able to relatively move the operation unit side body 2 and the display unit side body 3 connected via the hinge mechanism. That is, in the mobile phone 1, the operation unit side body 2 and the display unit side body 3 are opened (open state), and the operation unit side body 2 and the display unit side body 3 are folded. (Closed state). Here, the closed state is a state in which both housings are arranged so as to overlap each other, and the open state is a state in which both housings are arranged so as not to overlap each other.

  The outer surface of the operation unit side body 2 includes a front case 2a and a rear case 2b. The operation unit side body 2 exposes the operation key group 11 and the voice input unit 12 as a microphone to which the voice uttered by the user of the mobile phone 1 is input on the front case 2a side. Composed.

  The operation key group 11 includes a function setting operation key 13 for operating various functions such as various settings, a telephone book function, and a mail function, and an input operation key 14 for inputting a telephone number and characters such as mail. And a determination operation key 15 as an operation member for performing determination in various operations, scrolling in the vertical and horizontal directions, and the like. Each key constituting the operation key group 11 has a predetermined function according to the open / close state of the operation unit side body 2 and the display unit side body 3, various modes, or the type of the activated application. Assigned (key assignment). Then, when the user presses each key, an operation corresponding to the function assigned to each key is executed.

  The voice input unit 12 is disposed on the outer end side opposite to the connection unit 4 side in the longitudinal direction of the operation unit side body 2. That is, the voice input unit 12 is arranged on one outer end side when the mobile phone 1 is in the open state.

  An interface (not shown) for communicating with an external device (for example, a host device) is disposed on one side surface of the operation unit side body 2. A side key to which a predetermined function is assigned and an interface (not shown) through which an external memory is inserted and removed are arranged on the other side surface of the operation unit side body 2. The interface is covered with a cap. Each interface is covered with a cap when not in use.

  The outer surface of the display unit side body 3 includes a front panel 3a, a front case 3b, a rear case 3c, and a rear panel 3d. The front case 3b in the display unit side body 3 is disposed so as to expose a display unit 21 for displaying various types of information and a voice output unit 22 as a receiver for outputting the voice of the other party of the call. The Here, the display unit 21 includes a liquid crystal panel, a drive circuit that drives the liquid crystal panel, and a light source unit such as a backlight that emits light from the back side of the liquid crystal panel.

  Next, the internal structure of the operation unit side body 2 and the display unit side body 3 will be described with reference to FIGS. FIG. 2 is an exploded perspective view of members built in the operation unit side body 2. FIG. 3 is an exploded perspective view of members built in the display unit side body 3. FIG. 4 is a perspective view of the sub case 90 and the sub circuit board 100. FIG. 5 is a partial cross-sectional view illustrating a connection state between the antenna 108 and the main circuit board 70.

  As shown in FIG. 2, the operation unit side body 2 includes a front case 2a, a key structure 40, a key substrate 50, a case body 60, a reference potential pattern layer 75, and RF (Radio Frequency for cellular phones). ) A main circuit board 70 as a first circuit board including various electronic components such as modules, a sub case 90 as a case member having an antenna 108, a sub circuit board 100 as a second circuit, and a battery lid 2c. The rear case 2b and the battery 80 are provided.

  The front case 2a and the rear case 2b are disposed such that the concave inner surfaces face each other, and are joined so that the outer peripheral edges thereof overlap each other. Further, the key structure 40, the key board 50, the case body 60, the main circuit board 70, the sub case 90, and the sub circuit board 100 are sandwiched between the front case 2a and the rear case 2b. Built in.

  In the front case 2a, key holes 13a, 14a, and 15a as first openings are formed on the inner surface of the front case 2a facing the display unit 21 of the display unit side body 3 in a folded state. From each of the key holes 13a, 14a, 15a, the pressing surface of the function setting operation key member 13b constituting the function setting operation key 13, the pressing surface of the input operation key member 14b constituting the input operation key 14, and the determination operation key 15 The pressing surface of the determination operation key member 15b that constitutes is exposed. By pressing the exposed function setting operation key member 13b, the input operation key member 14b, and the determination operation key member 15b so as to depress, the metal dome described later is provided in each corresponding key switch 51, 52, 53. The apex of (saddle-like shape) is pressed and comes into electrical contact with the switch terminal.

  The key structure unit 40 includes an operation member 40A, a key frame 40B as a reinforcing member, and a key sheet 40C as a sheet member.

  The operation member 40A is composed of a plurality of key operation members. Specifically, it is configured by a function setting operation key member 13b, an input operation key member 14b, and a determination operation key member 15b. Each operation key member constituting the operation member 40A is bonded to the key sheet 40C with a key frame 40B described later interposed therebetween. As described above, the pressing surface of each operation key member bonded to the key sheet 40C is disposed so as to be exposed to the outside from each of the key holes 13a, 14a, 15a.

  The key frame 40B is a metallic plate-like member having a plurality of holes 14c. The key frame 40B is a reinforcing member for preventing adverse effects on the main circuit board 70 and the like due to pressing of the input operation key member 14b. The key frame 40B is a conductive member, and also functions as a member for releasing static electricity from the input operation key member 14b. The plurality of holes 14c formed in the key frame 40B are arranged so that convex portions 14d formed in the key sheet 40C described later are fitted. The input operation key member 14b is bonded to the convex portion 14d.

  The key sheet 40C is a flexible sheet-like member made of silicon rubber. As described above, a plurality of convex portions 14d are formed on the key sheet 40C. The plurality of convex portions 14d are formed on the surface of the key sheet 40C on the side where the key frame 40B is disposed. Each of the plurality of convex portions 14d is formed at a position corresponding to a key switch 52 described later.

  The key board 50 has a plurality of key switches 51, 52, 53 arranged on the key sheet 40C side. The plurality of key switches 51, 52, 53 are arranged at positions corresponding to the respective operation members 40A. The key switches 51, 52 and 53 arranged on the key substrate 50 have a structure having a metal dome of a metal plate which is curved in a bowl shape and is three-dimensionally formed. The metal dome is configured to be electrically connected to a switch terminal formed on an electric circuit (not shown) printed on the surface of the key substrate 50 when the apex of the bowl-shaped shape is pressed. Is done. The key board 50 is obtained by sandwiching wiring between a plurality of insulating layers (insulating films).

  Since the key substrate 50 is placed on the flat plate portion 61 of the case body 60, the pressure and the bending due to the pressing of each operation member 40A are not easily transmitted to the main circuit board 70 disposed below the case body 60. .

  The case body 60 is a conductive member having a shape in which one wide surface of a thin rectangular parallelepiped is opened. The case body 60 includes ribs 62 that are formed substantially perpendicular to the opening-side surface of the flat plate portion 61. The rib 62 is formed to be equal to or sufficiently higher than the height of the tallest electronic component among the various electronic components mounted on the main circuit board 70. The rib 62 is formed so as to correspond to the reference potential pattern layer 75 constituting the reference potential portion on the periphery and inside of the flat plate portion 61. Specifically, the rib 62 is formed so as to be disposed on the reference potential pattern layer 75 in a state where the case body 60 is placed on the main circuit board 70. Note that the case body 60 may be formed of a metal, a skeleton formed of a resin, and a conductor film formed on the surface thereof.

  The case body 60 is electrically connected to the reference potential pattern layer 75 by contacting the bottom surface of the rib with the reference potential pattern layer 75. The case body 60 is electrically connected to the reference potential pattern layer 75 and has the same potential as the reference potential pattern layer 75. That is, the case body 60 functions as a shield case. The case body 60 serves as a shield case to prevent external high frequency noise from acting on various electronic components disposed on the main circuit board 70, and from an RF (Radio Frequency) circuit, a CPU circuit, a power supply circuit, and the like. By shielding the emitted noise, it is possible to prevent the noise from acting on other electronic components or a receiving circuit connected to the antenna. Specifically, the bottom surface of the rib 62 in the case body 60 is disposed on the reference potential pattern layer 75, so that each circuit described later is surrounded by the rib 62 and covered with a part of the flat plate portion 61. The rib 62 functions as a partition wall in each circuit, and shields each circuit together with a part of the flat plate portion 61.

  On the main circuit board 70, various electronic components and circuits (not shown) including a signal processing unit that processes signals transmitted and received by the antenna 108 are arranged. Various electronic components form a plurality of circuit blocks by a predetermined combination. For example, various circuit blocks including an RF (Radio Frequency) circuit, a power supply circuit, and the like are formed.

  In addition to the various electronic components described above, a reference potential pattern layer 75 that constitutes a reference potential portion is formed on the first surface 70a of the main circuit board 70 on the case body 60 side. The reference potential pattern layer 75 is formed so as to partition each circuit block described above. The reference potential pattern layer 75 is formed by printing a conductive member in a predetermined pattern on the surface of the first surface 70a of the main circuit board 70. Further, on the second surface 70b on the rear case 2b side of the main circuit board 70, a land 130 with which an antenna 108 described later comes into contact is formed. On the second surface 70b side of the main circuit board 70, a sub case 90 for arranging the sub circuit board 100 is laminated.

  The sub case 90 is an insulating member formed of resin. The sub case 90 is attached to the connecting portion 4 side on the second surface 70 b of the main circuit board 70. That is, the sub case 90 is attached to a predetermined region (opposite side) of the second surface 70b corresponding to a region where the electronic component or the like is disposed on the first surface 70a.

  The sub circuit board 100 is fixed to the surface of the sub case 90 opposite to the main circuit board 70. By fixing the sub case 90 to the main circuit board 70, the sub circuit board 100 is arranged in a predetermined positional relationship with the main circuit board 70.

  An antenna 108 is disposed on the surface of the sub case 90 on the main circuit board 70 side. The antenna 108 is disposed on the surface of the sub case 90 on the main circuit board 70 side and on the end side in the width direction of the operation unit side body 2.

  As shown in FIGS. 4 and 5, the antenna 108 is formed by bending a sheet metal having a predetermined shape. The antenna 108 includes a planar portion 108a disposed along the planar portion of the subcase 90, a vertical portion 108b disposed on one end side of the antenna 108 and disposed substantially perpendicularly to the planar portion 108a, and positioned on the other end side. The spring part 120 as an elastic deformation part protruding toward the main circuit board 70 side, the mounting holes 110b and 111b formed in the flat part 108a, and the spring part 120 at the position protruding most toward the circuit board 70 side. A power supply terminal portion 121. The spring portion 120 functions as an urging portion that urges the power supply terminal portion 121 to abut on the land 130 formed on the second surface 70 b of the main circuit board 70. The antenna 108 is supplied with power from the main circuit board 70 by the power supply terminal part 121 included in the spring part 120 being in contact with the land 130 of the main circuit board 70.

  The antenna 108 is attached to the sub case 90 by fitting the mounting holes 110b and 111b to the protrusions 110a and 111a formed in the sub case 90 and performing thermocompression treatment. By attaching the sub case 90 to the main circuit board 70, the antenna 108 is arranged in a predetermined positional relationship with respect to the main circuit board 70. By attaching the sub case 90 to the main circuit board 70, the antenna 108 is disposed on the surface of the sub case 90 on the main circuit board 70 side. The power supply terminal portion 121 is disposed in contact with a predetermined land 130 formed on the second surface 70 b of the main circuit board 70.

  In this state, the antenna 108 is disposed away from the main circuit board 70, and the power supply terminal portion 121 is disposed in contact with the land 130 formed on the main circuit board 70. In a state where the sub case 90 is attached to the main circuit board 70, the distance between the flat portion 108a and the main circuit board 70 is set to be smaller than the distance in the natural state height direction of the spring portion 120. ing. Thereby, the spring part 120 urges the power supply terminal part 121 toward the main circuit board 70 side by an elastic force. In other words, the spring portion 120 biases the power supply terminal portion 121 toward the front case 2a so as to maintain contact with the land 130 formed on the main circuit board 70 by elastic force.

  The antenna 108 is disposed on the end portion side of the operation unit side body 2 on the connection unit 4 side, and is disposed in the center of the operation unit side body 2 in the thickness direction. The antenna 108 is disposed at a position that is not easily affected by a nearby human body during operation. The antenna 108 is arranged at a predetermined distance from the electronic components and the reference potential pattern layer 75 arranged on the first surface 70 a of the main circuit board 70. In addition, the antenna 108 is disposed away from the sub circuit board 100 with the sub case 90 interposed therebetween.

  On the sub circuit board 100, electronic components electrically connected to the main circuit board 70 are mounted and a reference potential pattern layer is formed. The sub circuit board 100 is fixed to the side opposite to the main circuit board 70 in the sub case 90. Since the sub case 90 is fixed to the second surface 70b side of the main circuit board 70 as described above, the sub circuit board 100 is arranged in a predetermined positional relationship with the main circuit board 70. The electronic components mounted on the sub circuit board 100 contribute to exhibiting various functions in the mobile phone 1 in cooperation with a plurality of electronic components mounted on the main circuit board 70.

  A detachable battery lid 2c is provided on one end side (in FIG. 2) of the rear case 2b. After the battery 80 is stored from the outside of the rear case 2b, the battery case 2b is attached to the rear case 2b. In addition, an audio input unit 12 (not shown) for inputting the user's voice is accommodated at one end of the rear case 2b.

  As shown in FIG. 3, the display unit side body 3 includes a front panel 3a, an audio output unit 22, a front case 3b, an audio output unit 22, a display unit 21, and a print to which the display unit 21 is connected. A substrate 85, a rear case 3c, and a rear panel 3d are provided.

  The display unit side body 3 includes a front panel 3a, a front case 3b, a display unit 21, a printed circuit board 85, a rear case 3c, and a rear panel 3d that are stacked. Specifically, the front case 3b and the rear case 3c are arranged so that the inner surfaces of the concave shapes face each other, and are joined so that the outer peripheral edges thereof overlap each other.

  A printed circuit board 85 to which the display unit 21 is connected is sandwiched between the front case 3b and the rear case 3c. A speaker connected to an amplifier (not shown) is connected to the printed board 85.

  According to the present embodiment, the mobile phone 1 includes a sub case 90 that is attached to the main circuit board 70, and an antenna 108 that is disposed in the sub case 90 and is fed from the main circuit board 70. Since the antenna 108 is arranged in the sub case 90 attached to the main circuit board 70, the antenna 108 is arranged away from the reference potential pattern layer 75 formed on the main circuit board 70 and the electronic components to be mounted. Thereby, the performance degradation of the antenna 108 is suppressed, and the mounting area of the main circuit board 70 can be secured.

  Further, according to the present embodiment, the sub case 90 is provided with the sub circuit board 100 on which electronic components that are electrically connected to the main circuit board 70 are mounted and the reference potential pattern layer is formed. As a result, the electronic components that should be originally mounted on the main circuit board 70 are arranged on the sub circuit board 100, and thus the main circuit board 70 can be reduced in size.

  According to the present embodiment, the sub case 90 has the antenna 108 disposed on one side of the sub case 90 and the second circuit board disposed on the other side. As a result, the antenna 108 is also arranged away from the sub circuit board 100, so that the performance degradation of the antenna 108 due to the electronic components and the reference potential pattern layer of the sub circuit board 100 can be more suitably suppressed.

  Further, according to the present embodiment, the antenna 108 is disposed to face the main circuit board 70. Specifically, in the operation unit side body 2, the main circuit board 70, the antenna 108, the sub case 90, and the sub circuit board 100 can be stacked in the thickness direction. That is, the antenna 108 can be arranged on the inner side in the thickness direction of the operation unit side body 2. Thereby, the performance degradation of the antenna 108 accompanying a human body approach can be suppressed suitably.

  In addition, according to the present embodiment, the antenna 108 has the spring portion 120 that is disposed on the main circuit board 70 side and that is elastically deformed and is in contact with the main circuit board 70, and is in contact with the main circuit board 70. Power is supplied from the main circuit board via the spring portion 120. Since the contact degree between the antenna 108 and the main circuit board 70 (land 130) is improved, power feeding from the main circuit board 70 to the antenna 108 is reliably realized. In addition, since it is not necessary to use a member such as a power supply pin, the number of parts can be reduced.

  As mentioned above, although preferred embodiment was described, this invention can be implemented with a various form, without being limited to embodiment mentioned above. For example, in the present embodiment, the mobile phone 1 is described as a communication device. However, the present invention is not limited to this, but is not limited to this. Etc.

  In the present embodiment, the cellular phone 1 that can be folded by the connecting portion 4 is described. However, the cellular phone 1 is not foldable, and the operation unit side body 2 and the display unit side body 3 are overlapped. One of the casings is centered on an axis along the overlapping direction of the operation unit side casing 2 and the display unit side casing 3 so that one casing is slid in one direction from the combined state. A rotation (turn) type that is rotated, or a type (straight type) in which the operation unit side body 2 and the display unit side body 3 are arranged in one housing and do not have a connecting portion may be used. The mobile phone 1 may be a so-called biaxial hinge type that can be opened and closed and rotated.

  Further, according to the present embodiment, the sub case 90 is attached with the sub circuit board 100 on which the electronic components that are electrically connected to the main circuit board 70 are mounted. May be implemented directly.

The external appearance perspective view in the state where cellular phone 1 was opened is shown. FIG. 6 is an exploded perspective view of members built in the operation unit side body 2. FIG. 5 is an exploded perspective view of members built in the display unit side body 3. 3 is a perspective view of a sub case 90 and a sub circuit board 100. FIG. 4 is a partial cross-sectional view illustrating a connection state between an antenna and a main circuit board. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile phone 2 Operation part side housing | casing 3 Display part side housing | casing 50 Key board 60 Case body 70 Main circuit board 90 Sub case 100 Sub circuit board 108 Antenna 120 Spring part 121 Feeding terminal part 130 Land

Claims (4)

A housing,
A first circuit board disposed in the housing;
A case member attached to the first circuit board;
An antenna arranged on the case member and fed from the first circuit board ,
The case is member, said first circuit electronic component or the second circuit communication device substrate Ru is arranged which electronic components are mounted the substrate are electrically connected to. Wherein the case member, the communication apparatus according to claim 1, wherein the antenna on one side of the case member while being positioned, said electronic component and the second circuit board on the other side are arranged. The communication device according to claim 2 , wherein the antenna is disposed to face the first circuit board. The antenna has an elastic deformation portion that is arranged on the first circuit board side and is in contact with the first circuit board in an elastically deformed state, and via the elastic deformation section that is in contact with the first circuit board. The communication device according to any one of claims 1 to 3 , wherein power is supplied from the first circuit board.

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