JP2007295435A - Broadcast receiving apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To connect a mobile terminal to an external antenna electromagnetically. <P>SOLUTION: A broadcast receiving apparatus has a mobile terminal table 1 to be connected to the external antenna and the mobile terminal 3 to be detachably installed on the mobile terminal table 1. The mobile terminal table 1 has a first coil 18 to be connected to the external antenna, and the mobile terminal 3 has a second coil 31 to be electromagnetically coupled with the first coil 18 in a state that it is installed on the mobile terminal table 1, a broadcast signal receiving portion 34 connected to the second coil 31 and an informing portion 3a to inform a broadcast based on a broadcast signal received at the broadcast signal receiving portion 34. When the broadcast signal is received through the external antenna in the state that the mobile terminal 3 is installed on the mobile terminal table 1, the broadcast signal is transmitted by an electromagnetic induction from the first coil 18 to the second coil 31 and is supplied to te broadcast signal receiving portion 34. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a broadcast receiving apparatus that receives a broadcast signal from an external antenna via a mobile terminal base by a mobile terminal such as a mobile phone.

  In recent years, as mobile terminals such as mobile phones and PDAs (Personal Digital Assistants) as typical examples, in addition to a transmission / reception function for transmitting and receiving information related to communication such as telephone calls and text messages as electromagnetic waves, for example, radio broadcasting such as AM or FM It has a broadcast reception function for receiving broadcast signals such as VHF or UHF television broadcasts, and receives broadcast signals such as radio broadcasts and television broadcasts to listen to radio programs and watch television programs. Or recording a received broadcast program has been proposed.

  Since this type of mobile terminal generally receives a broadcast signal via a simple antenna such as a built-in antenna or an antenna-compatible earphone cable, it is strongly influenced by the radio wave environment. For this reason, it is difficult to obtain a good reception state particularly in an indoor environment where the radio wave environment is bad, and as a result, it is often impossible to receive a broadcast program sufficiently satisfactorily.

  As a solution to this problem, the mobile terminal can be configured to receive signals from an external antenna, and a cradle that can be detachably attached to the mobile terminal can be connected to the external antenna via an external cable. In this configuration, a signal received from an external antenna is input to the portable terminal via an external cable and cradle by mounting the portable terminal on the cradle (see, for example, Patent Document 1). ).

In this way, if the mobile terminal is configured to be able to input a received signal from the external antenna, the external antenna is installed in a good location of the radio wave environment such as outdoors, and is hardly affected by the radio wave environment. High-quality broadcast signals can be received, and broadcast programs can be received sufficiently satisfactorily.
JP 2005-73005 A

  However, the technique disclosed in Patent Document 1 described above provides a portable terminal by providing an attached connector portion, a cradle having an external connector portion connected to an external antenna, and pressing the mobile terminal to the cradle. The terminal attached connector portion is fitted into the external connector portion of the cradle and mechanically brought into contact with each other to be electrically connected.

  For this reason, there is a concern that the contact portion between the attached connector portion and the external connector portion may be worn or damaged due to repeated attachment and detachment of the mobile terminal to / from the cradle, resulting in poor contact and reduced reliability. .

  Therefore, the objective of this invention made | formed in view of this situation is to provide the broadcast receiver which can connect a portable terminal and an external antenna electromagnetically.

The invention of the broadcast receiving apparatus according to claim 1, which achieves the above object, includes a mobile terminal base connected to an external antenna, and a mobile terminal detachably attached to the mobile terminal base,
The mobile terminal base has a first coil connected to the external antenna,
The portable terminal includes a second coil that is electromagnetically coupled to the first coil in a state of being mounted on the portable terminal base, a broadcast signal receiving unit connected to the second coil, and the broadcast signal receiving A notification unit for notifying broadcast based on the broadcast signal received by the unit,
When a broadcast signal is received via the external antenna in a state where the mobile terminal is mounted on the mobile terminal base, the broadcast signal is transmitted from the first coil to the second coil by electromagnetic induction. The broadcast signal receiving unit is configured to be supplied.

  The invention according to claim 2 is the broadcast receiving apparatus according to claim 1, wherein at least one of the first coil and the second coil is a planar coil.

  According to a third aspect of the present invention, in the broadcast receiving device according to the first aspect, one of the first coil and the second coil is an air-core coil, and the portable terminal is mounted on the portable terminal base. In the state, at least a part of the other coil enters the air core part of the air core coil.

  According to a fourth aspect of the present invention, in the broadcast receiving device according to any one of the first to third aspects, the portable terminal is connected while maintaining the electromagnetic coupling state between the first coil and the second coil. It has a support means supported so that rotation is relatively possible with respect to the said base for portable terminals, It is characterized by the above-mentioned.

The invention according to claim 5 is the broadcast receiving apparatus according to any one of claims 1 to 4, wherein the portable terminal further includes a transmission / reception unit that transmits and receives information related to communication as electromagnetic waves,
The first coil has a resonance frequency closer to a frequency of a broadcast signal received by the broadcast signal receiving unit than a frequency of an electromagnetic wave transmitted and received by the transmission / reception unit.

  According to the broadcast receiving apparatus of the present invention, since the mobile terminal and the external antenna can be electromagnetically connected, there is no risk of contact failure and the reliability of the apparatus can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a perspective view showing a broadcast receiving apparatus according to the first embodiment of the present invention. The broadcast receiving apparatus of the present embodiment includes a mobile terminal base 1 and a mobile terminal 3 exemplified as a mobile phone that is detachably attached to the mobile terminal base 1.

  The mobile terminal 3 receives broadcast signals such as radio broadcasts and television broadcasts in addition to a transmission / reception function (transmission / reception unit) that transmits and receives information related to communications such as telephone calls and text messages in the 800 MHz band or 2 GHz band as electromagnetic waves. It has a broadcast receiving function (broadcast signal receiving unit 34), a speaker (not shown) that is a notification unit for the received broadcast, and a display 3a, and an operation unit 3b for performing various operations, character input, and the like. ing.

  In addition, the portable terminal base 1 can be detachably connected to an external cable 2 connected to an external antenna (not shown), and the mobile terminal 3 can be received by the external antenna while being mounted in a predetermined posture. A signal is input to the portable terminal 3 via the external cable 2 and the portable terminal base 1 and is received by the broadcast signal receiving unit of the portable terminal 3.

  Therefore, as shown in a schematic cross-sectional view of the main part of the broadcast receiving apparatus in FIG. 2, a cable connection terminal portion 16 to which the external cable 2 is connected is connected to the lower case 10 of the mobile terminal base 1. The plug 17 which is a terminal of the external cable 2 is inserted from the bottom surface side of the lower case 10 so as to face the bottom surface.

  The cable connection terminal portion 16 has a coaxial connector structure in which an external contact 16b and a flange 16c are coaxially arranged outside the female center contact 16a. By inserting the center contact 17a into the center contact 16a of the cable connection terminal portion 16 and the contact ring 17b outside the plug 17 into the external contact 16b of the cable connection terminal portion 16, respectively, the cable connection terminal portion 16 and the plug 17 Are electrically connected.

  Further, in the upper case 15 of the portable terminal base 1, the first coil is formed in a planar shape such as a printed coil at a predetermined position on the back surface (inside) of the terminal installation portion 15 a to which the portable terminal 3 is detachably attached. A wound flat coil 18 is fixed by adhesion or the like. As shown in the circuit diagram of the main part of FIG. 3, the planar coil 18 has one end connected to the center contact 16 a of the cable connection terminal portion 16 to which the core wire of the external cable 2 is connected, and the other end connected to the termination resistor 19. Is connected to the external contact 16b of the cable connection terminal portion 16 to which the ground line of the external cable 2 is connected.

  Similarly, the portable terminal 3 is electromagnetically coupled to the planar coil 18 on the portable terminal base 1 side in a state where the portable terminal 3 is correctly attached to the terminal installation portion 15a of the portable terminal base 1. A planar coil 31 similar to the planar coil 18 is fixed to the back surface (inside) of the case 30 of the mobile terminal 3 by adhesion or the like. As shown in FIG. 3, the planar coil 31 has one end connected to a built-in antenna 33 for receiving broadcast signals provided in the mobile terminal 3 and the other end connected to a broadcast signal receiving unit 34.

  Here, the planar coil 18 on the portable terminal base 1 side has a resonance frequency closer to the frequency of the broadcast signal received by the broadcast signal receiving unit 34 than the frequency of the 800 MHz band or 2 GHz band at which the portable terminal 3 transmits and receives. Configure as follows. For example, when the broadcast signal receiving unit 34 can receive broadcast signals from FM radio broadcasts to UHF television broadcasts, the planar coil 18 is configured to have a resonance frequency approximately in the middle of the 70 MHz to 770 MHz band. To do.

  By doing so, even if electromagnetic waves related to communication having a frequency of 800 MHz band or 2 GHz band transmitted / received by the mobile terminal 3 are received by the external cable 2 and reach the planar coil 18, such communication is performed. It is preferable that the electromagnetic wave relating to communication is not electromagnetically induced in the planar coil 31 preferentially over the broadcast signal received by the broadcast signal receiving unit 34, and the electromagnetic wave related to communication is received by the broadcast signal receiving unit 34. Can be suppressed.

  Further, the planar coil 18 is configured to have a Q value that sufficiently reduces the gain in the 800 MHz band and the 2 GHz band in which the mobile terminal 3 transmits and receives. Here, the Q value indicates the sharpness of the coil determined by the coil characteristics, and indicates the width of the resonance curve of the planar coil 18.

  The planar coil 31 on the portable terminal 3 side is also configured in the same manner as the planar coil 18 on the portable terminal base 1 side.

  According to the present embodiment, when the mobile terminal 3 is correctly attached to the terminal installation portion 15a of the mobile terminal base 1, the planar coil 18 on the mobile terminal base 1 side and the planar coil 31 on the mobile terminal 3 side are Since it is opposed and electromagnetically coupled, the broadcast signal received by the external antenna and supplied to the planar coil 18 on the portable terminal base 1 side via the external cable 2 is transmitted from the planar coil 18 to the portable terminal 3 side. It is electromagnetically induced by the planar coil 31 and supplied to the broadcast signal receiving unit 34.

  Therefore, since it is not necessary to electrically connect the portable terminal base 1 and the portable terminal 3 by mechanically contacting the connectors as in the technique disclosed in Patent Document 1, no contact failure occurs. The reliability of the apparatus can be improved. Moreover, since it is not necessary to mechanically connect the portable terminal base 1 and the portable terminal 3, the degree of freedom in design can be improved.

  Furthermore, even if the mobile terminal 3 is mounted on the mobile terminal base 1 and a broadcast signal is received from the external antenna and data such as a phone call or text message is transmitted and received from the mobile terminal 3, the mobile terminal base 1 Since the planar coil 18 on the side and the planar coil 31 on the mobile terminal 3 side are configured to have a resonance frequency and a Q value that sufficiently reduce the gain in the 800 MHz band and the 2 GHz band in which the mobile terminal 3 performs transmission and reception, respectively. Even if the electromagnetic wave is received by the built-in antenna 33, the external antenna, the external cable 2, or the like, the noise mixed in the broadcast signal being received can be sufficiently reduced. Therefore, it is possible to receive a high-quality broadcast signal that is less affected by disturbances in the image or sound of the broadcast program being received.

  In the present embodiment, since the first coil on the portable terminal base 1 side is the planar coil 18, the terminal installation portion 15 a can be flattened, the upper case 15 can be easily processed, and the portable terminal base 1 can be reduced in size and thickness. Similarly, since the second coil on the mobile terminal 3 side is the planar coil 31, the portion of the case 30 of the mobile terminal 3 that is in contact with the terminal installation portion 15 a of the mobile terminal base 1 can be flattened, and the processing of the case 30 is easy. In addition, the portable terminal 3 can be reduced in size and thickness.

(Second Embodiment)
FIG. 4 is a cross-sectional view showing a schematic configuration of a main part of a broadcast receiving apparatus according to the second embodiment of the present invention.

  In the broadcast receiving apparatus according to the present embodiment, in the first embodiment, the terminal installation portion 15a of the upper case 15 of the mobile terminal base 1 is formed so as to be substantially horizontal with respect to the installation surface of the mobile terminal base 1. At the same time, a convex portion 15b is formed substantially at the center of the terminal installation portion 15a, and a winding coil 21 having a core 20 as a first coil is provided inside the convex portion 15b. The winding coil 20 is fixed by bonding or the like so that the coil axis is in the normal direction (vertical direction) of the terminal installation portion 15a, and one end of the winding coil 20 is the cable connection terminal portion 16 as in the first embodiment. The other end is connected to the external contact 16 b of the cable connection terminal portion 16 through the termination resistor 19.

  The portable terminal 3 has a concave portion 35 (supporting means) that can be inserted into and removed from the convex portion 15 b on the portable terminal base 1 side at the center of the case 30 that is a mounting surface for the portable terminal base 1. The portable terminal 3 can be switched between a state of attaching and detaching to the portable terminal base 1 by inserting and removing the concave portion 35 and the convex portion 15 b from each other. Further, since the concave portion 35 is configured to be rotatable relative to the convex portion 15b with the convex portion 15b as an axis, the portable terminal 3 is recessed in the state of being inserted with respect to the portable terminal base 1. It is comprised so that it can rotate relatively with respect to the base 1 for portable terminals with the said relative rotation with respect to the convex part 15b of 35. In addition, the back surface (inside) of the case 30 of the mobile terminal 3 includes an air-core coil 36 as a second coil formed so as to wind the recess 35. As in the first embodiment, one end of the air-core coil 36 is connected to the broadcast signal receiving built-in antenna 33 provided in the mobile terminal 3, and the other end is connected to the broadcast signal receiving unit 34. At the same time, when the mobile terminal 3 is inserted into the mobile terminal base 1, at least a part of the winding coil 21 of the mobile terminal base 1 enters the air core portion. With this configuration, the degree of adhesion between the air-core coil 36 and the winding coil 21 in a state where the mobile terminal 3 is mounted on the mobile terminal base 1 can be increased, and the electromagnetic coupling with each other can be further strengthened. Can be made.

  In addition, the winding coil 21 on the portable terminal base 1 side and the air-core coil 36 on the portable terminal 3 side are similar to those in the 800 MHz band and the 2 GHz band at which the portable terminal 3 transmits and receives, as in the first embodiment. The broadcast signal receiving unit 34 has a resonance frequency close to the frequency of the broadcast signal, for example, has a resonance frequency substantially in the middle of the received broadcast signal band. Similarly, the mobile terminal 3 is configured to have a Q value with which the gain is sufficiently reduced in the 800 MHz band and the 2 GHz band in which transmission and reception are performed.

  According to the present embodiment, the mobile terminal 3 is attached to the terminal installation portion 15 a of the mobile terminal base 1 by inserting the convex portion 15 b on the mobile terminal base 1 side into the concave portion 35 of the mobile terminal 3. When the mobile terminal 3 is attached to the mobile terminal base 1 due to the configuration, the winding coil 21 on the mobile terminal base 1 side and the air-core coil 36 on the mobile terminal 3 side are electromagnetically coupled, and the external terminal The broadcast signal received by the antenna and supplied to the winding coil 21 on the portable terminal stand 1 side is electromagnetically induced from the winding coil 21 to the air core coil 36 on the portable terminal 3 side and supplied to the broadcast signal receiving unit. Will be.

  Therefore, similarly to the first embodiment, the winding coil 21 and the air-core coil 36 do not need to be mechanically contacted and electrically connected to each other, so that they are electromagnetically connected to each other without causing contact failure. Therefore, the reliability of the apparatus can be improved. In addition, in the present embodiment, since the core 20 is provided in the winding coil 21 on the portable terminal base 1 side, the mutual inductance with the air core coil 36 on the portable terminal 3 side can be increased, thereby winding from the external antenna. Based on the broadcast signal supplied to the wire coil 21, a large electromotive force is induced in the air-core coil 36, so that the mobile terminal 3 can always stably receive a high-quality broadcast signal.

  In addition, while the mobile terminal 3 is mounted on the mobile terminal base 1, while maintaining the electromagnetic coupling state between the winding coil 21 on the mobile terminal base 1 side and the air-core coil 36 on the mobile terminal 3 side, Since it can be rotated about the convex portion 15b on the portable terminal base 1 side, for example, the rigidity of the coaxial cable for the external antenna connected to the portable terminal base 1 is high, and the portable terminal base 1 is moved. Even if the orientation of the mobile terminal 3 cannot be easily changed, the mobile terminal 3 can be easily rotated in a desired direction by rotating the mobile terminal 3 with respect to the mobile terminal base 1 as shown in FIG. Can be changed to Therefore, since the display 3a and the operation unit 3b of the portable terminal 3 can be easily changed to a desired direction, usability can be improved.

  In addition, this invention is not limited to the said embodiment, Many change or deformation | transformation is possible. For example, in the first embodiment, one or both of the planar coil 18 on the portable terminal base 1 side and the planar coil 31 on the portable terminal 3 side may be an air-core coil or a core-containing coil. . In the second embodiment, for example, the core 20 of the winding coil 21 on the portable terminal base 1 side is omitted to form an air-core coil, or one of the portable terminal base 1 side and the portable terminal 3 side is selected. Alternatively, both coils may be planar coils having the rotation center axis of the mobile terminal 3 as a coil axis.

  Further, the cable connection terminal portion 16 of the mobile terminal base 1 is omitted, the one end side of the coaxial cable is held on the mobile terminal base 1, and the one end side of the coaxial cable is terminated via the first coil and the terminating resistor. Then, a plug that can be connected to an external antenna or a cable terminal connected to the external antenna may be provided on the other end side. Furthermore, a charging function for the portable terminal 3 can be added to the portable terminal base 1. Moreover, the portable terminal 3 may have only a broadcast receiving function.

It is a perspective view which shows the broadcast receiver which concerns on 1st Embodiment. It is a schematic sectional drawing of the principal part of 1st Embodiment. Similarly, it is the circuit diagram of the principal part. It is sectional drawing which shows schematic structure of the principal part of the broadcast receiver which concerns on 2nd Embodiment. It is a figure for demonstrating the usage condition of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile terminal stand 2 External cable 3 Mobile terminal 3a Display 3b Operation part 10 Lower case 15 Upper case 15a Terminal installation part 15b Convex part 16 Cable connection terminal part 17 Plug 18 Planar coil 19 Termination resistor 20 Core 21 Winding coil 30 Case 31 Planar coil 33 Built-in antenna 34 Broadcast signal receiver 35 Recess 36 Air core coil

Claims (5)

A portable terminal base connected to an external antenna; and a portable terminal detachably attached to the portable terminal base;
The mobile terminal base has a first coil connected to the external antenna,
The portable terminal includes a second coil that is electromagnetically coupled to the first coil in a state of being mounted on the portable terminal base, a broadcast signal receiving unit connected to the second coil, and the broadcast signal receiving A notification unit for notifying broadcast based on the broadcast signal received by the unit,
When a broadcast signal is received via the external antenna in a state where the mobile terminal is mounted on the mobile terminal base, the broadcast signal is transmitted from the first coil to the second coil by electromagnetic induction. The broadcast receiving apparatus is configured to be supplied to the broadcast signal receiving unit.   The broadcast receiving apparatus according to claim 1, wherein at least one of the first coil and the second coil is a planar coil.   One of the first coil and the second coil is an air-core coil, and when the mobile terminal is mounted on the mobile terminal base, at least a part of the other coil is placed on the air-core part of the air-core coil. The broadcast receiving apparatus according to claim 1, wherein the broadcast receiving apparatus is configured to enter.   It has supporting means for supporting the portable terminal so as to be rotatable relative to the portable terminal base while maintaining the electromagnetic coupling state between the first coil and the second coil. The broadcast receiving apparatus according to any one of claims 1 to 3. The portable terminal further includes a transmission / reception unit that transmits and receives information related to communication as electromagnetic waves,
5. The first coil according to claim 1, wherein the first coil has a resonance frequency closer to a frequency of a broadcast signal received by the broadcast signal receiving unit than a frequency of an electromagnetic wave transmitted and received by the transmission / reception unit. The broadcast receiving device according to item.

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