JP2006173732A - Mobile antenna - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile antenna the reception sensitivity of which is not deteriorated even by noise generated from an electronic apparatus connected to the mobile antenna and a change in an operating state of the mobile antenna. <P>SOLUTION: The mobile antenna 1 is arranged with an antenna sheath member (strap) 2 for suspending an electronic apparatus for transmitting/receiving a radio wave, and the antenna sheath member being provided with a conductor wire 4 formed by using a conductor, and an antenna main body 3 for receiving a particular radio wave is formed to part of the conductor wire 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a portable antenna for receiving radio waves used for cellular phones, radio broadcasts, and the like, and more particularly to a portable antenna in which a reception antenna is built in a strap for hanging a cellular phone or the like.

  Electronic devices that use radio waves such as telephones and radio receivers (hereinafter simply referred to as “electronic devices”) are used not only indoors but also outdoors. These electronic devices used outdoors are carried as mobile phones, portable radio receivers, and the like. Among them, mobile phones have a high penetration rate, and since most people carry mobile phones when they are outdoors, functions such as radio may be added to the mobile phones.

  When a function such as a radio receiver is added to a mobile phone, since the radio waves to be used are different, it is necessary to provide both the mobile phone antenna and the antenna used for the radio receiver or the like. In general, these antennas are often built in the casing of the mobile phone to be installed. However, if these antennas are installed next to each other, the reception sensitivity is affected. In some cases, the antenna used for the above is separated from the outside of the mobile phone. As one embodiment thereof, there is a strap-type portable antenna that is used by incorporating an external antenna in a loop-shaped strap and connected to a mobile phone or the like (see Patent Documents 1 and 2).

  When the above-mentioned portable antenna is connected to a mobile phone or the like with an added function such as a radio receiver, the antenna body disposed on the portable antenna receives radio waves used in the electronic device and receives the received electronic device. Provide radio waves. Since the antenna installed in the portable antenna is away from the antenna installed in electronic devices such as mobile phones, the influence of noise is reduced, and the reception status of radio waves is built into the mobile phone. It will be better than if you are.

  A portable antenna having such characteristics is usually a strap formed of an insulating material, an antenna formed of a conductive material, and an antenna for electrically connecting the antenna and the electronic device. And a connection terminal connected to a portion. Straps for portable antennas are generally formed by weaving fiber resin into a cylindrical shape, and the straps are looped so that they can be easily pulled by hand, hooked on a trouser belt, or suspended from the neck. Is made.

  In the conventional portable antenna, in order to improve the reception sensitivity, the antenna for receiving the radio wave is disposed in the entire strap cylinder (see Patent Document 3).

JP 2001-251407 A JP 2001-352207 A JP 2001-257520 A

  However, since backlights used in liquid crystal display devices for mobile phones and transmitting antennas for mobile phones are likely to be sources of noise, the mobile antenna receives desired radio waves together with unnecessary radio waves. There was a problem that the reception sensitivity of the receiver and the like deteriorated.

  In addition, most conventional strap-type portable antennas have built-in earphones, and the strap-type portable antennas that improve reception sensitivity remain connected to the built-in speakers provided in the electronic device. It was virtually impossible to make a sound.

  Accordingly, the present invention has been made in view of these points, and a portable antenna whose reception sensitivity does not deteriorate due to noise generated from an electronic device connected to the portable antenna or a change in the usage status of the portable antenna is provided. It is an object of the present invention to provide.

  In order to achieve the above-described object, the portable antenna according to the present invention has, as a first feature, a conductor formed using a conductor on an antenna covering member for suspending an electronic device that transmits and receives radio waves. In addition, a part of the conducting wire is formed by an antenna body that receives a specific radio wave.

  As a second feature, in the portable antenna having the first feature, the antenna covering member is formed in a loop shape having a size that allows the head of a human body to be inserted.

  As a third feature, in the portable antenna having the first and second features, the conducting wire is formed of a flat knitted wire, a twisted pair, or a coaxial flexible conductor.

  As a fourth feature, in the portable antenna having any one of the first to third features, the antenna body is disposed near the center of the antenna covering member along the antenna covering member. .

  Further, as a fifth feature, in the portable antenna having the first feature, the antenna covering member is formed in a spiral shape that can be expanded and contracted.

  As a sixth feature, in the portable antenna having the fifth feature, the conducting wire is formed of a flat knitted wire, a twisted pair, or a coaxial flexible conductor.

  As a seventh feature, in the portable antenna having the fifth or sixth feature, one end of the antenna covering member is disposed near the center in the longitudinal direction of the antenna body.

  As an eighth feature, in the portable antenna having any one of the fifth to seventh features, a clip portion that can be sandwiched in the antenna body is provided.

  By implementing the present invention, there is an effect of ensuring a state in which the reception sensitivity of an electronic device that receives radio waves is best without being particularly aware of the mounting position of the portable antenna of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2. Here, FIG. 1 shows a first embodiment in which the portable antenna of the present invention is formed in a neck strap shape, and FIG. 2 shows the portable antenna of the present invention having a spiral strap and a clip member. 2nd Embodiment formed and used is shown.

  As shown in FIGS. 1 and 2, the portable antenna 1 of the present embodiment (first and second embodiments) is a strap-like antenna covering member (hereinafter simply referred to as “ 2), an antenna body 3 that receives radio waves, and a connection terminal 7 for electrically connecting the portable antenna 1 and the electronic device. The portable antenna 1 according to the first and second embodiments described below is different in the shapes of the strap 2 and the antenna body 3. First, the portable antenna 1 according to the first embodiment will be described.

  As shown in FIG. 1, the portable antenna 1 according to the first embodiment is a loop-shaped strap 2 having a size that can be suspended from a user's neck. . The strap 2 is formed of a resin having load resistance and electrical insulation in a cylindrical shape, such as a cellular phone strap 2 formed in a cylindrical shape by weaving a fibrous polyamide resin. Further, the end portions of the strap 2 are coupled together by a rectangular coupling member 5 made of resin. At one end of the coupling member 5, there is a loop-shaped attachment member 6 formed with a load resistance sufficient to suspend and use an electronic device or the like connected to the portable antenna 1. It is arranged.

  Near the center of the loop-shaped strap 2 in the longitudinal direction, an antenna body 3 formed in a rod shape is disposed. The vicinity of the center in the longitudinal direction in which the antenna body 3 is disposed corresponds to a position on the back side of the user's neck when the portable antenna 1 is suspended from the neck. The antenna body 3 is arranged so that the longitudinal direction of the antenna body 3 is along the longitudinal direction of the strap 2. As the antenna body 3, when receiving an AM broadcast radio wave, it is preferable to use a conductor made of a magnetic material such as ferrite and having a predetermined inductance wound around it and covered with a cylindrical or rectangular resin case.

  Conductive wires 4 for joining to the connection terminals 7 are formed at both ends of the antenna body 3, and the conductive wires 4 are disposed in the cylinder of the strap 2. As this conducting wire 4, it is preferable to use a flat conductor (a parallel wire formed of two or more), a twisted pair (twisted wire), or a flexible conductor formed coaxially. In particular, the conducting wire 4 is formed by a flat knitted wire or a twisted pair in order not only to propagate the radio wave received by the antenna body 3 to the connection terminal 7 but also to receive radio waves for FM broadcasting. More preferably.

  A connection terminal 7 is attached to the end of the conducting wire 4 to which the antenna body 3 is not attached. Since the connection terminal 7 can be connected to individual electronic devices that receive radio waves, the connection terminal 7 is formed in a shape suitable for the connection of the electronic device. For example, when used by connecting to a radio receiver or the like, the cylindrical connection terminal 7 having a diameter of about 2 to 3 mm used for an earphone plug or the like is formed. In addition, when connected to a mobile phone, the external device connection terminal 7 formed near the lower part of the mobile phone or on the side surface, or the transmission antenna connection terminal to which the mobile phone transmission antenna is attached is provided. Is formed.

  The portable antenna 1 according to the first embodiment formed as described above does not deteriorate in receiving sensitivity even if noise is generated from an electronic device connected to the portable antenna 1 or a change in the usage status of the portable antenna 1. It has the characteristics. The characteristics are described below.

  When an electronic device is attached to the attachment member 6 of the portable antenna 1 for use, the portable antenna 1 suspended from the neck of a user who uses the portable antenna 1 (hereinafter referred to as “user”) Depending on the weight of the electronic device attached to the attachment member 6, the electronic device is arranged near the chest or abdomen of the user, and the antenna body 3 arranged near the center of the strap 2 is placed on the back side of the user's neck. Deploy.

  When a user intervenes between the antenna body 3 and the electronic device, noise generated from the electronic device is blocked by the user (human body), so the antenna body 3 on the back side of the user's neck is affected. The reception sensitivity of the portable antenna 1 will not deteriorate. That is, since the antenna body 3 is not affected by the adjacent noise source such as an electronic device, the reception state can be kept good.

  In addition, since the longitudinal direction of the antenna body 3 is arranged along the longitudinal direction of the strap 2, the antenna body 3 can be kept substantially horizontal with respect to the ground regardless of changes in usage conditions. . When the antenna body 3 is disposed in the horizontal direction, the portable antenna 1 can efficiently receive vertical polarized waves such as radio waves for AM broadcasting, so that reception of an electronic device to which the portable antenna 1 is connected is possible. The sensitivity will be improved.

  Furthermore, the conducting wire 4 connected to the end of the antenna body 3 is a flat conducting wire, a twisted pair, or a flexible conducting wire 4 formed coaxially. Regardless, the inductance of the antenna body 3 does not change. Furthermore, when the conducting wire 4 is a flat braided wire or a twisted pair, the conducting wire 4 can receive radio waves that the antenna body 3 does not receive. It is possible to receive. For example, when the antenna body 3 receives AM broadcasting radio waves and the lead wire 4 at one end connected to the antenna body 3 receives FM broadcasting radio waves, the portable antenna 1 of the present embodiment can be used for both AM / FM. It can function as an antenna.

  Next, the portable antenna 1 of 2nd Embodiment is demonstrated.

  As shown in FIG. 2, the portable antenna 1 according to the second embodiment is formed in a spiral shape having a length that allows the portable antenna 1 to be suspended between a user's belt loop and the like. It is a strap 2. The strap 2 is formed of a resin having load resistance and electrical insulation in a cylindrical shape, such as a cellular phone strap 2 formed in a cylindrical shape by weaving a fibrous polyamide resin. Further, one end of the strap 2 is coupled to a rectangular coupling member 5 formed of resin. The coupling member 5 is formed on the back surface side with respect to the surface to which the strap 2 is coupled, having a load resistance sufficient to allow the electronic device connected to the portable antenna 1 to be suspended and used. A loop-shaped attachment member 6 is disposed.

  In the spiral strap 2 described above, the antenna body 3 formed in a rod shape is disposed at the other end where the coupling member 5 is not disposed, and the vicinity of the center with respect to the longitudinal direction of the antenna body 3 is disposed. The strap 2 is fixed to the head. In the antenna body 3, a clip portion 3 a that can be sandwiched using the outer wall of the antenna body 3 is formed in the longitudinal direction of the antenna body 3. As the antenna body 3, in the case of receiving AM broadcast radio waves, it is preferable to use a conductor made of a magnetic material such as ferrite and wound with a conducting wire 4 having a predetermined inductance and covered with a cylindrical or rectangular resin case. .

  One end of the strap 2 is disposed near the center of the antenna body 3 in the longitudinal direction, and a conductive wire 4 is formed in the cylinder of the disposed strap 2. As this conducting wire 4, it is preferable to use a flat conductor (a parallel wire formed of two or more), a twisted pair (twisted wire), or a flexible conductor formed coaxially. In particular, the conducting wire 4 is formed by a flat knitted wire or a twisted pair in order not only to propagate the radio wave received by the antenna body 3 to the connection terminal 7 but also to receive radio waves for FM broadcasting. More preferably.

  A connection terminal 7 is attached to the end of the conducting wire 4 to which the antenna body 3 is not attached. Since the connection terminal 7 can be connected to individual electronic devices that receive radio waves, the connection terminal 7 is formed in a shape suitable for the connection of the electronic device. For example, when used by connecting to a radio receiver or the like, the cylindrical connection terminal 7 having a diameter of about 2 to 3 mm used for an earphone plug or the like is formed. In addition, when used by connecting to a mobile phone, the external device connection terminal 7 formed near the lower portion or the side surface of the mobile phone, or the transmission antenna connection terminal to which the mobile phone transmission antenna is attached Is formed.

  The portable antenna 1 according to the second embodiment formed as described above does not deteriorate in reception sensitivity even if noise is generated from an electronic device connected to the portable antenna 1 or a change in the usage status of the portable antenna 1. It has the characteristics. The characteristics are described below.

  When an electronic device is attached to the attachment member 6 of the portable antenna 1 for use, the portable antenna 1 suspended by being sandwiched by a user's belt loop or the like depends on the weight of the electronic device attached to the attachment member 6. The antenna main body 3 extends downward from the portion where the antenna main body 3 is sandwiched, and the shape of the portable antenna 1 changes depending on the usage situation. However, the portion of the portable antenna 1 that mainly receives radio waves is the antenna body 3, and since the antenna body 3 is located farthest from the connected electrical device, the reception sensitivity of the portable antenna 1 hardly deteriorates. become. That is, since the antenna body 3 is not affected by the adjacent noise source such as an electronic device, the reception state can be kept good.

  Further, since the clip portion 3a is formed in the longitudinal direction of the antenna main body 3, the antenna main body 3 can be kept substantially horizontal with respect to the ground regardless of changes in usage conditions. When the antenna body 3 is disposed in the horizontal direction, the portable antenna 1 can efficiently receive vertical polarized waves such as radio waves for AM broadcasting, so that reception of an electronic device to which the portable antenna 1 is connected is possible. The sensitivity will be improved.

  Furthermore, the conducting wire 4 connected to the end of the antenna body 3 is a flat conducting wire, a twisted pair, or a flexible conducting wire 4 formed coaxially. Regardless, the inductance of the antenna body 3 does not change. Furthermore, when the conducting wire 4 is a flat braided wire or a twisted pair, the conducting wire 4 can receive radio waves that the antenna body 3 does not receive. It is possible to receive. For example, when the antenna body 3 receives an AM broadcast radio wave and the conductor 4 connected to the antenna body 3 receives an FM broadcast radio wave, the portable antenna 1 of the present embodiment is used as an AM / FM dual antenna. It is possible to function.

  In other words, the portable antenna 1 of the present invention is not extremely deteriorated because the reception sensitivity of the portable antenna 1 does not deteriorate due to noise generated from an electronic device connected to the portable antenna 1 or a change in the usage status of the portable antenna 1. It is possible to ensure good reception sensitivity.

  In addition, this invention is not limited to embodiment mentioned above, A various change is possible as needed.

The front view which shows 1st Embodiment which uses the portable antenna of this invention in the shape of a neck strap. The front view which shows 1st Embodiment which uses and forms the portable of this invention with a helical strap and a clip member.

Explanation of symbols

1 Portable antenna 2 Antenna covering member (strap)
3 antenna body 3a clip portion 4 conducting wire 5 coupling member 6 mounting member 7 connection terminal

Claims (8)

  A portable conductor in which a conductor formed using a conductor is disposed on an antenna covering member for suspending an electronic device that transmits and receives radio waves, and an antenna body that receives a specific radio wave is formed on a part of the conductor. antenna.   2. The portable antenna according to claim 1, wherein the antenna covering member is formed in a loop shape having a size that allows a head of a human body to be inserted.   3. The portable antenna according to claim 1, wherein the conductive wire is formed of a flat knitted wire, a twisted pair, or a coaxial flexible conductor.   The portable antenna according to any one of claims 1 to 3, wherein an antenna body is disposed near the center of the antenna covering member along the antenna covering member.   2. The portable antenna according to claim 1, wherein the antenna covering member is formed in a spiral shape that can be expanded and contracted.   6. The portable antenna according to claim 5, wherein the conducting wire is formed of a flat knitted wire, a twisted pair, or a coaxial flexible conductor.   The portable antenna according to claim 5 or 6, wherein one end of the antenna covering member is disposed near the center in the longitudinal direction of the antenna body.   The portable antenna according to any one of claims 5 to 7, wherein a clip portion that can be sandwiched between the antenna main body is disposed.

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