JP2004363963A - Portable communication equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the operation convenience of portable communication equipment having a demountable antenna. <P>SOLUTION: In conducting pen input by removing the removable antenna from an equipment body, field intensity at the location and the demounting state of the antenna are discriminated. A warning is generated stepwise based on the discrimination result. To improve operability in total darkness, by brightening an input pen at its extreme section, a neighborhood involved in input operation with the pen and the operation section of the equipment body of the other equipment are illuminated. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mobile communication device provided with an insertable antenna unit.
[0002]
[Prior art]
There are devices that display input buttons on a liquid crystal panel and are operated with an information input pen (stylus pen), and mobile terminal devices that can write and input characters and numbers directly on the liquid crystal display unit.
[0003]
The input stylus pen was molded into a pen shape and attached to the main body or stored in the holder, but there were problems such as increased dimensions and mass of the main body shape due to securing the storage space. . As means for solving these problems, there is a method in which a detachable antenna is used also as an input pen and used as an input device (for example, see Patent Document 1). Also, when the antenna is also used as an input pen, the antenna provided on the main body side and the input pen have a diversity function to prevent deterioration of reception sensitivity due to variation in radio wave intensity. There is a technology (for example, refer to Patent Document 2).
[0004]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 9-191207 [Patent Document 2]
JP-A-11-191751
[Problems to be solved by the invention]
When the antenna is also used as an input pen, if there is an incoming call with the antenna removed from the main unit and pen input is performed, the diversity function may be lost in an area where the radio wave is weak (weak electric field area) . As a result, if an incoming error or call disconnection occurs, it becomes inconvenient for the user. Another problem to be solved when performing a pen input in the dark is that the pen tip and the input button are difficult to confirm, and there is a problem that an accurate input operation cannot be performed.
[0006]
Therefore, an object of the present invention is to solve the above-described problems and improve the usability of a mobile communication device.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, when the pen input is performed by removing the insertable antenna from the main body, the electric field strength and the detached state of the antenna at that location are determined, and a warning is issued stepwise based on the determination result. Further, in order to improve the operability in the dark, the tip of the input pen is illuminated to illuminate the vicinity of the input operation with the pen and other operation units of the device main body.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to FIGS.
[0009]
FIG. 1 is a block diagram showing basic components of the mobile communication device. The mobile communication device is, for example, a mobile phone or a PDA (Personal Digital Assistance). The portable communication device 30 includes a detachable antenna 2 (hereinafter, referred to as a whip antenna), an antenna 3 (hereinafter, a built-in antenna) built in a housing, an RF circuit 4, a communication control unit 5, a receiver 6, a microphone 7, a liquid crystal. A display unit 8, an operation button unit 9, a speaker 25, a rechargeable battery 28, an indicator 24, a display controller 10 for controlling the liquid crystal display unit, a charge control circuit 27 for charging the rechargeable battery 28, and a detachable state of the whip antenna 2 is detected. It is composed of an antenna detection circuit 20.
[0010]
Hereinafter, the function of each element of the mobile communication device 30 will be briefly described. A radio wave 1 transmitted from a base station of the radio telephone network is captured by a detachable whip antenna 2 also serving as an input pen and an antenna 3 built in the device housing, and connected to an RF circuit 4. The whip antenna 2 has a structure that can be extended and stored from the main body, and is used properly depending on the state of radio waves in the wireless network. Radio waves captured by the two antennas, the whip antenna 2 and the built-in antenna 3, are converted into baseband signals by the RF unit 4 and input to the communication control unit 5. The main control operations of the communication control unit 5 include a call sound output to the receiver 6, a ringtone and a call sound output to the speaker 25, a user call sound input from the microphone 7, and a sound signal to be transmitted to the RF unit. If the signal to be transmitted / received is data information, the data information is output to the liquid crystal display unit 8 via the display controller 10 and is input from the operation button unit 9 including ten keys and the like. Various kinds of information are displayed on the liquid crystal display unit 8 and decoded to execute predetermined processing.
[0011]
When transmitting information, data information is transmitted from the communication control unit 5 to the RF unit, converted into an RF signal, and transmitted from the two antennas described above. The indicator 24 is installed at a position on the upper part of the main body that is easy for the user to see, and displays an incoming call or charging state. In the present embodiment, the indicator 24 blinks in a stepwise manner when the reception gain is reduced due to a change in antenna gain or electric field strength. It has a warning function. The RF level detected by detecting the RF signal input to the RF circuit 4 changes depending on the strength of the radio wave captured by the antenna. The communication control unit 5 converts the RF level into data, and switches the indicator 24 according to the situation. It blinks or displays a message on the liquid crystal display unit 8.
[0012]
FIG. 2 shows a connection configuration diagram of the whip antenna 2 and the built-in antenna 3. FIG. 2A shows a case where the whip antenna 2 is mounted on the main body of the portable device, and FIG. 2B shows a case where the whip antenna 2 is removed from the main body. The portable communication device 30 is provided with an upper guide 21 and a bottom guide 22 that guide when the whip antenna 2 is inserted and withdrawn and hold when used as an antenna. The upper guide 21 and the bottom guide 22 are provided with an antenna upper pressing spring 15, an antenna upper detecting switch 18, an antenna bottom pressing spring 16, and an antenna bottom detecting switch 19, respectively. The antenna upper holding spring 15 and the antenna bottom holding spring 16 are connected to the RF circuit 4, and the antenna upper detection switch 18 and the antenna bottom detection switch 19 are connected to the antenna detection circuit 20.
[0013]
The built-in antenna 3 inside the main body of the portable communication device 30 is formed of a plate-shaped antenna element unit formed by printing a conductor length corresponding to an RF frequency band wavelength of a wireless network on a substrate or by a nickel alloy or the like. I have. The installation position is set at a position where it is difficult to hide in the palm of the user during use or standby, for example, at the bottom of the main body housing. This is to prevent a decrease in the reception gain caused by the human body becoming a reflection or absorption body of radio waves and covering and hiding the built-in antenna 3 with a palm.
[0014]
In the present embodiment, the main body is provided with two antennas, and a diversity reception operation of selectively receiving one having a higher reception gain of each antenna is performed. The built-in antenna 3 and the whip antenna 2 are arranged in a vertical positional relationship with each other in consideration of the reception gain efficiency, so that the antenna can be efficiently received even when the posture of the portable communication device 30 changes in a general range. I have. Further, when fading in which the strength of the radio wave changes with time occurs, the antenna having the larger reception gain can be selected between the two antennas, so that stable reception performance is obtained that is hardly influenced by the fluctuation.
[0015]
Since the built-in antenna 3 is installed in the main body, the antenna always functions as an antenna. However, when the whip antenna 2 is removed, the antenna function is lost because it is electrically separated from the RF circuit 4 of the main body. Resulting in. For this reason, in the present invention, when the whip antenna 2 is removed and only the built-in antenna 3 is used alone, the reception gain of the RF circuit 4 is switched so as to obtain the main sensitivity on the built-in antenna side. Assuming that the antenna gain of using the built-in antenna alone is about 80% of the case of using two antennas, even if the whip antenna 2 is extracted and used as an input pen, practically sufficient receiving performance can be obtained with the built-in antenna. You can talk and wait.
[0016]
The sensitivity ratio is changed by switching both antenna matchings, and the insertion / removal state of the whip antenna 2 is determined by the antenna upper detection switch 18, the antenna bottom detection switch 19, and the antenna detection circuit 20. The detection method will be described later with reference to FIG.
[0017]
In general, in the case of the diversity reception system, the directivity and gain by combining phases can be improved by arranging and combining and distributing a plurality of antennas having the same performance and the same specifications electrically and mechanically, so that both antenna performances must be uniform. The balance of the antenna sensitivity is lost, and a problem occurs in the selection of the gain. When the whip antenna 2 is mounted on the main body as shown in FIG. 4A and used, the antenna matching of the RF circuit 4 is switched so that the performance of both antennas is uniform, and the antenna sensitivity is adjusted so as to have uniform antenna sensitivity. Therefore, the antenna performance is equal and the effect of diversity reception is enhanced. When the whip antenna 2 is removed as shown in FIG. 4B, the matching of the RF transmission / reception unit 4 is switched so that the reception gain of the built-in antenna 3 is maximized.
[0018]
Next, the attachment / detachment mechanism of the whip antenna 2 and detection will be described with reference to FIG. 4 (a) to 4 (c) show how the whip antenna 2 is used, in which the whip antenna and its mounting portion are enlarged. (A) shows a state in which the whip antenna 2 is completely housed inside the main body, (b) shows a state in which the whip antenna is extended most when mounted on the main body, and (c) shows a state in which the whip antenna is removed from the main body. ing.
[0019]
When the whip antenna of FIG. 4A is completely housed in the main body, the antenna bottom holding spring 16 is engaged with the groove provided on the circumference of the antenna stopper 14 and is fixed by the compressive force of the holding spring. . Similarly, the groove and the antenna upper holding spring 15 are engaged with each other on the upper antenna joint portion 12 side and fixed. At this time, the antenna top detection switch 18 and the antenna bottom detection switch 19 are opened with respect to the contact point, the antenna detection circuit 20 outputs a signal indicating that an antenna is present, and the call control unit 10 determines that "antenna is inserted".
[0020]
The antenna top detection switch 18 and the antenna bottom detection switch 19 are electrically connected to the antenna element 13 via the antenna stopper 14 and the antenna joint 12, and serve as contact points between the antenna and the RF circuit. In addition, a main body side positive charging electrode 46 and a main body side negative charging electrode 47 are arranged near the antenna upper holding spring 15. This is a charging terminal for a small battery serving as a power source for a light source used to illuminate the tip of the antenna. The charging terminal performs the same control as that for the charging battery 28 of the portable communication device body. The rechargeable antenna internal battery 42 is installed inside the whip antenna 2 as shown in FIG. 5, and uses a small and lightweight coin battery.
[0021]
In consideration of safety, charging can be performed when the whip antenna 2 is completely loaded in the main body, that is, in the state shown in FIG. When the whip antenna 2 is extended as shown in FIG. 4B, or when the whip antenna 2 is pulled out and the charging terminal is exposed as shown in FIG. 4) and FIG. 4B, the charging control circuit 27 detects that there is no battery 42 inside the antenna and does not charge.
[0022]
Only when the whip antenna 2 is completely loaded is the antenna internal battery 42 detected by the charging control circuit 27 of the mobile communication device 30. Then, the charging of the antenna internal battery 42 is started simultaneously with the charging of the main body charging battery 28. Here, the time when the whip antenna 2 is completely loaded means that the antenna-side plus electrode 44 on the whip antenna side and the antenna-side minus electrode 45 as shown in FIG. It refers to a state in which the charging electrode 46 is in contact with the main body side negative charging electrode 47.
[0023]
The case where the whip antenna 2 is extended will be described with reference to FIG. Even in this state, the antenna upper holding spring 15 is electrically connected to the antenna element 13 and can be connected to the RF circuit of the main body to perform an antenna transmitting / receiving operation. However, when between FIG. 4 (a) and FIG. 4 (b), since there is no electrical conductive contact, it is not connected to the RF circuit and the function of the antenna is lost. Further, as described above, in a state other than the state shown in FIG. 4A, the charging electrode on the antenna side and the charging electrode on the main body side are not in contact with each other. Also, the charging of the antenna internal battery 42 is not performed.
[0024]
In the state shown in FIG. 4B, the antenna bottom detection switch 19 is turned on because the antenna stopper 14 is moved upward, but the antenna top detection switch 18 is pressed by the antenna stopper 14 and turned off. It has become. At this time, the antenna detection circuit 20 outputs a signal indicating that the antenna is inserted, and determines that the antenna is inserted “present” as in the case of FIG. 4A. When the antenna top detection switch 18 and the antenna bottom detection switch 19 are off, it is detected as "with antenna", and when they are on, it is detected as "without antenna". Further, if either the antenna top detection switch 18 or the antenna bottom detection switch 19 is off, it is determined that the antenna is inserted.
[0025]
Next, the case of FIG. 4C in which the antenna is removed from the main body will be described. At this time, both the antenna top detection switch 18 and the antenna bottom detection switch 19 are turned on, and it is determined that the antenna is not present in the main body. In this case, only the built-in antenna 3 is in a transmission / reception state, and the above-described antenna matching of the RF circuit 4 is switched to be optimized on the built-in antenna 3 side. As a result, even if the whip antenna 2 is pulled out and pen input is performed, a necessary reception gain can be ensured by the built-in antenna 3, and standby and talking can be performed.
[0026]
However, in this case, the gain characteristics become unstable as compared with a state where an optimum gain such as a diversity operation is obtained with two antennas. For example, in a weak electric field area or an area where the radio wave condition is poor, there is a high possibility that troubles such as disconnection of a call or dropping out of a service area determined by the communication network as being outside the communication area will occur. Out of range due to a weak electric field is difficult to notice in a normal standby state, and it is necessary for the user to recognize this state. For this reason, in the present embodiment, when the standby sensitivity is reduced while the whip antenna 2 is removed, the blinking cycle of the indicator 24 is shortened stepwise as the strength of the electric field decreases, and a warning is issued. A sentence or message is displayed on the liquid crystal display unit 10. This can prompt the user to return the whip antenna 2 to the main body as soon as possible. When the whip antenna 2 is returned to the main unit, the receiving sensitivity is improved compared to when the built-in antenna 3 is operating alone, and the original receiving gain of the device is secured. It can be prevented before it happens.
[0027]
Next, the structure and internal configuration of the whip antenna 2 will be described with reference to FIG. Since the material of the antenna element 13 is rich in flexibility and flexibility and excellent in capturing radio waves, a nickel titanium alloy is generally used. Since the area around the antenna element 13 is insulated in a DC manner, it is covered with a coating tube 32 to prevent leakage of high-frequency current. The antenna top portion 11 at the upper end has a semi-cylindrical shape slightly larger in diameter than the element diameter so that the user can easily pull it, and is processed into a tapered shape so as to be easily used as an input pen.
[0028]
In the present embodiment, it is assumed that the whip antenna 2 is detached from the main body and used as an input pen, and the length and thickness of the pen are processed into a shape excellent in operability. The length is affected by the dimensions of the main body of the portable communication device 30, but is preferably about 5 to 10 cm, and the thickness is preferably about several mm from the viewpoint of easy picking. The whip antenna 2 can be realized by a linear antenna element 13 when the frequency of transmission and reception is high, but when the frequency is low, the antenna element needs to be a helical antenna or the like in order to accommodate the length. The type of the whip antenna 2 is not limited as long as it can have the required antenna performance and a size and shape that can be used as a stylus pen.
[0029]
Further, a light emitting element 41 is provided inside the antenna top portion 11 and can be turned on / off by a lighting changeover switch 43. This allows the tip of the pen tip to emit light and illuminate the area around the input button, so that the user can perform an input operation even in darkness. Note that a light-emitting diode is preferably used for the light-emitting element because it is small and can provide relatively high luminance at a low current. The antenna top portion 11 is formed into a lens shape so that the light emitted from the light emitting diode therein can be efficiently radiated, and is made of a transparent or translucent material having good light transmittance.
[0030]
As a power source for the light emitting diode, a small coin battery is built in the whip antenna 2. As the antenna internal battery 42, a rechargeable battery is used. As described above, the antenna side positive charging electrode 44 and the antenna side negative charging electrode 45 are provided below the antenna top portion 11 for the battery 42 inside the antenna, and the charging electrode 44 is inserted when the antenna is inserted into the main body. This can be achieved by electrically connecting the antenna side negative charging electrode 45, the main body side positive charging electrode 46, and the main body side negative charging electrode 47. The charging current is controlled by the charging control circuit 27, and the charging is stopped when the battery is fully charged, so that heat generation and destruction due to overcharging can be prevented.
[0031]
The antenna top section 11 can emit light even when the antenna is mounted on the main body. Light emission is turned on / off by a lighting switch 43 provided beside the antenna top. The antenna stopper 14 at the lower end of the antenna is referred to as an antenna end, and has a structure in which a conventional antenna is provided with a projection having a diameter larger than the holder diameter and cannot be removed from the portable communication device body. This portion is also made of conductive metal (for example, aluminum) that has been subjected to a low abrasion treatment, and serves as an electrical contact between the antenna element 13 and the RF circuit of the main body. In addition, an antenna joint portion 12 serving as an electrical contact with the RF circuit is provided below the antenna top portion 11, so that the whip antenna 2 can capture radio waves even when the whip antenna 2 is inserted.
[0032]
As described above, the upper and lower antenna top holding springs 15 and the bottom holding spring 16 are provided for the purpose of connecting to the RF circuit when the antenna is stored and extended, and the spring structure prevents the antenna from falling off. it can.
[0033]
Next, FIG. 3 shows a state in which the whip antenna 2 is used as an input pen. FIG. 3A shows a case where the whip antenna 2 is attached to the main body, and FIG. 3B shows a case where the whip antenna 2 is detached from the main body and used as an input pen for performing an input operation. FIG. 3C shows a state in which the tip of the input pen is illuminated to illuminate the operation unit. For example, when the operation is performed in the dark, buttons, and characters are small and difficult to see, it is effective as an operation aid for the user. Function.
[0034]
As described above, in a normal call, since the main body is provided with an antenna as shown in FIG. 3A, transmission and reception are performed by two antennas with the built-in antenna 3 so that even if the electric field strength changes. Although there are few problems such as an incoming error and a disconnection, when the antenna is removed as shown in FIGS. 3B and 3C, the removed whip antenna 2 functions as an antenna. Since no diversity function is provided, the reception performance becomes more unstable than when two antennas are used. When the reception gain is reduced, a warning display or a warning sound is issued stepwise according to the electric field level. Thus, the user can be alerted.
[0035]
FIG. 6 shows an example of a tabulated data conversion value (A / D conversion value) with respect to the RF level (reception power value). Generally, in a conventional mobile phone terminal, the number of antenna icons in the liquid crystal display unit 8 is displayed by a value read from the data (A / D value) to express the electric field strength. In the present embodiment, in addition to the icon display, the detachment state of the whip antenna 2 from the main body is grasped, the indicator 24 flashes, a message is displayed on the liquid crystal display section 8 to warn that the electric field is weak, and the speaker 25 is displayed. Make a warning message by voice.
[0036]
For example, in a strong electric field environment (in a case where the electric field strength is −70 dB or more, a strong electric field environment and a stable reception standby state are performed, so that a warning or a message is not displayed. In this case (the electric field strength is less than -70 dB), the indicator 24 blinks at a cycle of t seconds, and a message character such as "The electric field has become weaker" on the liquid crystal display 8 or a message voice is output from the speaker 25.
[0037]
Note that the period t seconds of the indicator 24 is changed according to the electric field intensity. For example, when the electric field intensity is -90 dB or more and less than -70 dB, the period is set to 2 seconds. When the electric field intensity is -105 dB or more and less than -90 dB, the blinking period is changed to 1 second. Thereby, the user can know the change in the electric field strength. If the electric field intensity is less than -90 dB, the blinking cycle is changed, and a message "The electric field has become weaker. Return the antenna." Is issued from the liquid crystal display 8 and the speaker 25. Is desirable. Furthermore, when the environment becomes out of the service area with the electric field strength of −105 dB or less, the blinking cycle is set to 0.5 seconds, and the call cannot be received because the electric field is weak. Return the antenna immediately and move to the reception area. Perform a warning display.
[0038]
In the above-described embodiment, the warning has been described such that the indicator 24 blinks, the character is displayed on the liquid crystal display unit 8, and the voice is displayed from the speaker 25. However, one or two of these may be combined. Further, the contents of each warning display are not limited to the above, and may be, for example, a change in the amount of light emitted from the indicator 24, a change in the volume or height of the speaker, or a graphical display on the liquid crystal display unit 8. .
[0039]
When the whip antenna 2 is removed from the main body of the mobile communication device 30 and used as an input pen, the user who confirms the above-mentioned warning and message recognizes that the environment he or she is currently using is a weak electric field area. it can. It is the purpose of the warning display that the recognized user performs an operation of returning the antenna to the main body, thereby causing an action of improving the reception gain and restoring to a stable reception operation. In other words, when the warning is displayed, the user performs the act of returning the antenna, so that it is possible to prevent an incoming call error, out of service area, disconnection of a call, etc. beforehand, stand by in a stable state, and make a call.
[0040]
As described above, in the present embodiment, when using in a weak electric field area or an area environment where radio waves are unstable, when inserting and removing the insertable antenna from the main body and performing pen input, the electric field strength at that place, A function of judging the detached state of the antenna and issuing a warning stepwise based on the judgment result is provided.
[0041]
By giving a step-by-step warning when the reception gain during standby becomes smaller than a predetermined reference level, the user is urged to return the antenna that also serves as an input pen to the main body, thereby preventing a call disconnection beforehand, Calls and information can be obtained in a stable state.
[0042]
Furthermore, in the present embodiment, as the operability improving means in the dark, the tip of the input pen is illuminated to illuminate the vicinity of the input operation with the pen and other operation units of the device main body.
[0043]
Generally, in the case of mobile devices, the operation buttons and the liquid crystal display unit have a backlight illumination function, but if there is no button operation to reduce the battery consumption of the device, it is set to turn off in a few seconds to several tens of seconds. I have. In the case of pen input, there is an operation of directly pressing a button, but there is also a case of inputting a character on a liquid crystal screen or operating an icon button on the screen. In this case, it is conceivable that the backlight illumination increases the consumption of the main battery and shortens the battery life. In the present invention, the pen tip shines without turning on the backlight illumination, so that sufficient brightness for operation can be secured, operability in the dark is improved, input mistakes, erroneous operations, etc. are prevented, and the battery consumption of the main body The effect of reduction can also be obtained.
[0044]
According to the present embodiment, it is possible to prevent the gain of the receiving sensitivity from deteriorating due to the use environment and provide a means for improving the operability of input.
[0045]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the usability of the portable communication apparatus provided with the detachable antenna can be improved.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a mobile communication device.
FIG. 2 is a connection configuration diagram showing a configuration around an antenna of the mobile communication device.
FIG. 3 is a diagram showing a usage example when a whip antenna is used as an input pen.
FIG. 4 is an internal structural diagram showing a detachable structure of a whip antenna.
FIG. 5 is a structural diagram showing the shape and structure of a whip antenna.
FIG. 6 is a conversion table when data of an antenna gain is converted.
[Explanation of symbols]
2: whip antenna, 3: built-in antenna, 4: RF circuit, 5: communication control unit, 6: receiver, 7: microphone, 8: liquid crystal display unit, 9: operation button, 10: display controller, 11: antenna top unit , 12: Antenna joint, 13: Antenna element, 14: Antenna stopper, 15: Antenna top holding spring, 16: Antenna bottom holding spring, 18: Antenna top detection switch, 19: Antenna bottom detection switch, 20: Antenna detection circuit , 21: Top guide, 22: Bottom guide, 24: Indicator, 25: Speaker, 32: Covering tube, 41: Light emitting diode, 42: Antenna internal battery, 43: Lighting changeover switch, 44: Antenna side positive charging electrode, 45: negative charging electrode on the antenna side, 46: positive charging electrode on the main body side, 47: Side minus charging electrode

Claims (5)

A main antenna built inside the housing,
A secondary antenna detachable from the housing;
A wireless control unit that transmits and receives radio waves of a wireless network via the main antenna and the sub-antenna,
A control unit connected to the wireless control unit for transmitting and receiving information;
An information display unit for displaying received information on a screen,
Detecting means for detecting electric field gain information on reception sensitivity in the wireless control unit,
Determining means for determining whether the auxiliary antenna is attached or detached,
Notifying means for notifying according to the electric field gain information and the antenna attachment / detachment state,
Mobile communication devices. The portable communication device according to claim 1, wherein the notifying unit notifies when the sub-antenna is removed from the housing and the reception sensitivity is lower than a predetermined level. The portable communication device has a light emitting unit and an audio output unit,
2. The notification unit according to claim 1, wherein the notification unit changes the light emitting state by the light emitting unit, displays a message on a screen by the information display unit, or outputs a voice message by the voice output unit. 3. The mobile communication device according to 2. A radio control unit for transmitting and receiving radio waves of a radio network, a control unit connected to the radio control unit for transmitting and receiving information, an information input unit disposed on the surface of the mobile phone terminal, and information received or input information And a main antenna for performing transmission and reception between the main body and the base station, and a sub antenna, wherein the main antenna is built in the housing of the main body, The antenna has a structure detachable from the main body, even in the case where the sub-antenna is removed from the main body of the device, in a portable communication device capable of transmitting and receiving operation with the main antenna alone,
A portable communication device having a function of causing the light-emitting body to emit light by operating the switch unit, the light-emitting body being provided with a switch unit and a battery unit for switching a light emitting state with the light emitting body at one end of the sub-antenna. The mobile communication device includes a device body battery and a battery charging unit,
The mobile communication device according to claim 4, further comprising: a contact portion for charging a battery built in the sub-antenna portion simultaneously with charging of the device body battery; and a charge control circuit.

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