JP2006319731A - Strap with built-in antenna - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a strap with a built-in antenna capable of improving the reception sensitivity of a portable electronic device by being connected to the portable electronic device utilizing radio communication. <P>SOLUTION: This strap 1 with a built-in antenna is provided with an external antenna 3 having an antenna section 3a provided outside the portable electronic device 11 provided with antennas 12, 13, and a connection portion 3b for connecting the portable electronic device 11 to the antenna section 3a; and a strap body 2 having a strap section 2a formed in a circle by binding both ends of a hollow string having the antenna section 3a in a longitudinal direction and the circle being formed so as to have a size enough to allow the string to be wound around the neck N of a human body H, the wrist or the other part of the human body H and hung from the part, and a coupling section 2c for coupling the portable electronic device 11 to one part of the strap section 2a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a strap with a built-in antenna, and particularly relates to a strap with a built-in antenna that can be suitably used as an external antenna connected to a portable electronic device using wireless communication.

  2. Description of the Related Art Conventionally, cellular phones, PDAs (personal personal digital assistants) and other portable electronic devices using wireless communication (hereinafter simply referred to as “portable electronic devices”) have an antenna for receiving desired radio waves. ing. The shape and arrangement of this antenna are determined according to the frequency of received radio waves, reception sensitivity, and the like. For example, a mobile phone using ultra-high frequency (UHF) has a whip antenna extending outward from the casing and a built-in antenna disposed inside the casing. With the antenna and the built-in antenna, the mobile phone forms spatial diversity and improves its reception sensitivity (see Patent Document 1).

  In order to obtain desired reception sensitivity and high portability, an external antenna formed integrally with an earphone or a headphone used for a portable electronic device may be used as an antenna of the portable electronic device. As an example, the diversity antenna headphone receives a desired radio wave from the GND signal line of the speaker unit and transfers the received electric signal of the radio wave to the portable electronic device connected to the diversity antenna headphone. (See Patent Document 2).

JP-A-8-79152 JP 2003-163529 A

  However, even when spatial diversity is configured using a whip antenna and a built-in antenna of a portable electronic device, the distance from the whip antenna to the built-in antenna is increased due to restrictions on the size of the case of the portable electronic device. Therefore, there is a problem that it is difficult to effectively take a fading countermeasure for the portable electronic device.

  In addition, the diversity antenna headphone connected to the portable electronic device usually tends to be used by loosening the GND signal line from the connection portion of the portable electronic device to the speaker portion. It was difficult to expect improvement, and there was a problem that fading countermeasures were effectively applied to portable electronic devices.

  Therefore, the present invention has been made in view of these points, and is connected to a portable electronic device using a wireless communication such as a mobile phone, a PDA (personal personal digital assistant), and the like. It is an object of the present invention to provide a strap with a built-in antenna that can improve the receiving sensitivity of a device.

  In order to achieve the above-described object, an antenna built-in strap according to the present invention includes, as one aspect thereof, an antenna unit disposed outside a portable electronic device including an antenna in a housing, a portable electronic device, and an antenna. An external antenna having a connection portion for connecting the antenna portion, an antenna portion of the external antenna, and a strap portion that is formed in an annular shape that can be suspended from a part of a human body, and a strap And a strap main body having a connecting part for connecting the portable electronic device to a part of the part.

  As a result, it is possible to effectively and synergistically obtain the spatial diversity and polarization diversity effect by the antenna in the housing of the portable electronic device and the external antenna of the antenna built-in strap.

  The external antenna described above is preferably formed to be an ISDB-T antenna that receives radio waves for digital terrestrial television broadcasting.

  This makes it possible to efficiently receive terrestrial digital television broadcast radio waves.

  Further, the strap main body described above preferably has a remote control means for controlling a tuner built in the portable electronic device.

  This makes it possible to select the terrestrial digital television broadcast channel (frequency) and volume displayed on the portable electronic device from the strap with a built-in antenna without operating the portable electronic device directly. Therefore, the convenience of the portable electronic device can be improved.

  Since the antenna built-in strap according to the present invention is formed as described above, the portable electronic device can efficiently receive desired radio waves with diversity, and can effectively prevent signal deterioration due to fading. Thereby, there exists an effect that the receiving sensitivity of the said portable electronic device etc. improves.

  Hereinafter, embodiments of the strap with a built-in antenna according to the present invention will be described with reference to FIGS. Here, FIG. 1 is a plan view of the strap with a built-in antenna and the portable electronic device of the present embodiment. FIG. 2 schematically shows a circuit diagram of the antenna built-in strap of the present embodiment. FIG. 3 schematically shows a state in which the antenna built-in strap of the present embodiment is suspended from the neck of a human body. FIG. 4 schematically shows a state in which the antenna built-in strap according to another embodiment is suspended from the wrist of a human body.

  As shown in FIG. 1, the strap 1 with a built-in antenna of the present embodiment includes a mobile phone, a PDA (personal personal digital assistant), and other portable electronic devices using wireless communication (hereinafter simply “portable electronic devices”). It is formed so that it can be connected to 11 and used. Specifically, this antenna built-in strap 1 has a strap body 2, an external antenna 3, and a remote control means 6, as shown in FIG. The strap body 2 includes a strap portion 2a, a binding portion 2b, and a connecting portion 2c, and the external antenna 3 includes an antenna portion 3a and a connection portion 3b.

  The strap portion 2a of the strap body 2 is formed to be a flexible belt-like hollow string (strap) by weaving synthetic resin fibers. Further, as shown in FIG. 1, both ends of the hollow strap portion 2a are formed in an annular shape by being bound by a binding portion 2b. Then, the strap portion 2a formed in an annular shape has such a length that when the annular strap portion 2a is hung on the neck N of the human body H, the binding portion 2b is disposed in a region between the chest and the abdomen of the human body H. It is formed with thickness.

  The binding portion 2b for binding the vicinity of both ends of the strap portion 2a is a lightweight and impact-resistant box using a synthetic resin having excellent mechanical properties such as ABS (acrylonitrile / butadiene / styrene copolymer) resin. It is formed in a shape. Further, in the inside of the binding portion 2b, the vicinity of both ends of the strap portion 2a is bound. A connecting portion 2c for connecting the portable electronic device 11 is formed at a position facing the strap portion 2a outside the binding portion 2b.

  The connecting portion 2c is formed by ringing a tough synthetic resin fiber that does not break even when the portable electronic device 11 is connected. The annular connecting portion 2c is formed to have a length that allows it to be inserted into and connected to the L-shaped or U-shaped tunnel-shaped mounting hole 11b of the portable electronic device 11.

  Further, the antenna portion 3a of the external antenna 3 is formed in a planar shape by forming a conductive wire such as aluminum or copper on a flexible insulating substrate formed of a synthetic resin such as polyethylene terephthalate. The antenna portion 3a is formed to have a width dimension shorter than the length in the width direction (short direction) of the strap portion 2a, and the antenna portion 3a is connected to the strap portion 2a from one end of the hollow strap portion 2a. Are inserted in the longitudinal direction.

  The conductor of the antenna portion 3a formed on the flexible insulating substrate is a monopole antenna having a length that is 1/4 or 1/2 times the wavelength of the received radio wave with respect to the longitudinal direction of the strap portion 2a. It is formed to become. In the present embodiment, ISDB-T (digital terrestrial television broadcast) that receives digital terrestrial television broadcast by connecting to a portable electronic device 11 having a digital terrestrial television broadcast tuner 15 (see FIG. 2). ) The antenna portion 3a is formed so as to be an antenna.

  The connecting portion 3b formed at one end of the antenna portion 3a has a connecting wire 3c that carries the radio wave received by the antenna portion 3a as an electric signal, and a connecting plug 3d that is coupled to the other end of the conducting wire. is doing. The connection line 3c is formed using a coaxial cable, and is covered between the binding portion 2b and the connection plug 3d by a cylindrical protective cover 4 formed using an insulating synthetic resin. . The connection terminal is formed in a standardized shape such as a flat plug (RC-5240). The connection plug 3d has a plurality of connection terminals so that it can be used for connection lines used for members other than the external antenna 3.

  As shown in FIG. 2, the portable electronic device 11 to which the strap body 2 and the external antenna 3 are connected includes a whip antenna 12, a built-in antenna 13, antenna switching means 14, a tuner 15, a power source 19, a control means 16, and a display. 17 and a speaker 18.

  The whip antenna 12 of the portable electronic device 11 is formed to have a length that is ¼ times the wavelength of the received radio wave, and is arranged so that it can be inserted into and removed from the casing of the portable electronic device 11. It is installed. The built-in antenna 13 is formed of a metal material such as aluminum or copper as an elongated flat plate, and the portable electronic device 11 has a longitudinal direction perpendicular to the longitudinal direction of the whip antenna 12. Arranged inside the housing.

  The antenna switching means 14 is connected to a connection socket 11 a into which the whip antenna 12, the built-in antenna 13 and the connection plug 3 d are inserted, and receives the electric signal of the received radio wave obtained from the whip antenna 12, the built-in antenna 13 and the external antenna 3. It is configured to switch or synthesize appropriately.

  The tuner 15 connected to the antenna switching means 14 is formed to be a digital terrestrial television broadcast tuner 15, and selects an electric signal of a desired channel (frequency) from an electric signal of a received radio wave, and displays an image. A signal and an audio signal are separated. The tuner 15 is configured to output the separated video signal and audio signal to the control means 16.

  The control means 16 connected to the tuner 15 is configured to perform control for causing the tuner 15 to select an electric signal of a desired channel (frequency). Further, the control means 16 outputs the video signal obtained from the tuner 15 to the display 17 to display a desired image, and outputs the audio signal obtained from the tuner 15 to the speaker 18 to output the desired audio. It is formed so that control can be performed. The control means 16 is also connected to a power source 19 and is configured to perform control for supplying desired power to various members connected to the power source 19.

  The power source 19 is formed so as to supply driving power to the various members 14 to 18 of the portable electronic device 11. Further, the power source 19 is configured to supply power to the whip antenna 12, the built-in antenna 13, and the external antenna 3 via the antenna switching means 14.

  The remote control means 6 of the strap 1 with a built-in antenna is connected to the power source 19 and the control means 16 of the portable electronic device 11. As shown in FIG. 2, the remote control means 6 includes switches 7A, 7B, 7C, 7D between a plurality of resistors connected in series from the power source 19 of the portable electronic device 11 and at the rear end of the row. One end is connected, and a GND signal line connected to the power source 19 is connected to the other end of each of the switches 7A, 7B, 7C, 7D. The switches 7A, 7B, 7C, and 7D are formed so as to be membrane switches that can be easily thinned. As shown in FIG. 1, the input surfaces 7a, 7b, and 7D of the switches 7A, 7B, 7C, and 7D 7c and 7d are integrally formed on the surface of the strap portion 2a. As shown in FIG. 1, a mark used for selecting a desired channel (frequency) is formed on the surface of the strap portion 2a to be the input surfaces 7a, 7b, 7c, 7d of the switches 7A, 7B, 7C, 7D. 7a and 7b and marks 7c and 7d used for adjusting the volume are formed. The remote control means 6 having such switches 7A, 7B, 7C and 7D passes through the strap portion 2a and the protective cover 4 of the antenna built-in strap 1 and is connected to the portable electronic device 11 via the connection plug 3d. It is arranged to be possible.

  Next, the action of the antenna built-in strap 1 of the present embodiment will be described with reference to FIGS. 2 and 3.

  The strap with a built-in antenna 1 of the present embodiment is coupled to the mounting hole 11b of the portable electronic device 11 through the coupling portion 2c. Further, as shown in FIG. 3, the strap 1 with a built-in antenna has an antenna portion 3a of an external antenna 3 inside the strap portion 2a and is suspended from the neck N of a human body H that is a user. The portable electronic device 11 can be carried around. As a result, the user who uses the portable electronic device 11 connected to the strap 1 with built-in antenna can easily improve the receiving sensitivity of the external antenna 3 of the strap 1 with built-in antenna. 11 can be carried together.

  Further, as shown in FIG. 2, the external antenna 3 of the antenna built-in strap 1 of the present embodiment is connected to the antenna switching means 14 via the connection plug 3d. This antenna switching means 14 is formed so as to appropriately switch or synthesize electric signals of received radio waves obtained from the whip antenna 12, the built-in antenna 13, and the antenna portion 3a of the external antenna 3. In the antenna built-in strap 1 of the present embodiment, the external antenna 3 is connected to the portable electronic device 11 via the connection portion 3b, so that the whip antenna 12, the built-in antenna 13, and the antenna portion 3a of the external antenna 3 are used. Can be arranged with an interval equal to or longer than the wavelength of 1/4 of the received radio wave. From this, by using the external antenna 3, the portable electronic device 11 having the whip antenna 12 and the built-in antenna 13 can obtain a space diversity effect. In particular, in the configuration of the whip antenna 12 and the external antenna 3, as shown in FIG. 3, the portable electronic device A is used by the user A so that the user can easily see the display 17 of the portable electronic device 11. Since the device 11 is often held upright, the whip antenna 12 and the antenna portion 3a of the external antenna 3 tend to be orthogonal to form polarization diversity, and the portable electronic device to which the external antenna 3 is connected 11 can obtain not only a space diversity effect but also a polarization diversity effect.

  Furthermore, since the antenna built-in strap 1 of this embodiment propagates an electric signal of a desired received radio wave to a portable electronic device 11 including a terrestrial digital television broadcast tuner 15, the external antenna 3 of this embodiment is connected to the terrestrial digital. The antenna is formed to be an ISDB-T antenna that receives radio waves for television broadcasting. Thereby, the strap 1 with a built-in antenna according to the present embodiment can efficiently receive radio waves for digital terrestrial television broadcasting.

  When the whip antenna 12, the built-in antenna 13 and the external antenna 3 are used, the portable electronic device 11 efficiently receives a desired radio wave for terrestrial digital television broadcasting. The radio waves received by these three antennas are converted into electric signals and then sent to the tuner 15 via the antenna switching means 14. When the tuner 15 selects an electric signal of a desired channel (frequency) from the electric signal of the received radio wave and separates the video signal and the audio signal, the tuner 15 outputs the video signal and the audio signal to the control unit 16. Then, the control means 16 outputs the video signal to the display 17 to display a desired image, and performs control to output the audio signal obtained from the tuner 15 to the speaker 18 and output the desired audio.

  Here, the strap 1 with a built-in antenna of the present embodiment has a remote control means 6 connected to the portable electronic device 11 via a connection plug 3d, and the remote control means 6 is shown in FIG. As shown, switches 7A, 7B, 7C, and 7D are provided for selecting a desired terrestrial digital television broadcast channel (frequency) and adjusting the volume of the terrestrial digital television broadcast. Thus, the channel (frequency), volume, etc. of digital terrestrial television broadcasting can be appropriately selected only by the strap 1 with a built-in antenna without directly operating the operation buttons and the like provided on the portable electronic device 11. It is possible. Thereby, the antenna built-in strap according to the present embodiment can improve the convenience of the portable electronic device 11.

  That is, the strap with a built-in antenna according to the present invention enables a portable electronic device to efficiently receive a desired radio wave with diversity and effectively prevent signal degradation due to fading. Thereby, there exists an effect which the receiving sensitivity of the said portable electronic device etc. improves. Further, since the strap with a built-in antenna has remote control means for controlling the control means connected to the tuner of the portable electronic device, the convenience of the strap with a built-in antenna having high portability can be further improved. There is a possible effect.

  In addition, this invention is not limited to embodiment mentioned above etc., A various change is possible as needed. For example, in the antenna built-in strap 1 of the present embodiment described above, the length of the strap portion 2a is determined on the assumption that the strap portion 2a is suspended from the neck N of the human body H. In another embodiment, as shown in FIG. 4, the length of the strap portion 2a is determined on the assumption that the strap portion 2a is suspended from the hand A (wrist) of the human body H. Also good. That is, the antenna built-in strap of the present invention can be formed in accordance with the suspension mode of the user.

The top view which showed the one aspect | mode of the antenna built-in strap and portable electronic device of this invention Schematic circuit diagram showing the structure of the strap with a built-in antenna of this embodiment Schematic showing a state in which the antenna built-in strap of this embodiment is suspended from the neck of a human body The schematic diagram which showed the state which suspended the strap with a built-in antenna of the other aspect in this invention from the wrist of a human body

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Strap with built-in antenna 2 Strap body 2a Strap part 2b Bundling part 2c Connection part 3 External antenna 3a Antenna part 3b Connection part 3c Connection line 3d Connection plug 4 Protective cover 6 Remote control means 7A, 7B, 7C, 7D Switch 7a, 7b, 7c, 7d Switch input surface 11 Portable electronic device 11a Connection socket 11b (Connecting portion) mounting hole 12 Whip antenna 13 Built-in antenna 14 Antenna switching means 15 Tuner 16 Control means 17 Display 18 Speaker 19 Power supply

Claims (3)

An external antenna having an antenna portion disposed outside a portable electronic device including an antenna in a housing; and a connection portion connecting the portable electronic device and the antenna portion;
An antenna portion of the external antenna is incorporated, and a strap portion that is formed in an annular shape that can be suspended from a part of a human body, and the portable electronic device is connected to a part of the strap portion. A strap with a built-in antenna, comprising: a strap main body having a connecting portion. The antenna built-in strap according to claim 1, wherein the external antenna is formed to be an ISDB-T antenna that receives radio waves for digital terrestrial television broadcasting. The strap with a built-in antenna according to claim 1 or 2, wherein the strap main body has a remote control means for controlling a tuner built in the portable electronic device.

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