JP3781668B2 - Hands-free call device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hands-free call device for a mobile communication terminal having a call function such as a mobile phone.
[0002]
[Prior art]
With the rapid spread of mobile phones, the number of cases of accidents using mobile phones with one-handed operation while driving a car has increased rapidly. To prevent this, hands-free communication devices for mobile phones used in the car Is provided.
[0003]
For example, in the one described in Japanese Patent Laid-Open No. 10-243072, a harness and a mobile phone that are electrically connected to a mobile phone are provided in addition to a microphone and a speaker in a cup-shaped housing (device main body) that accommodates the mobile phone. A compression coil spring and limit switch that pops up are installed, and the limit switch detects that the mobile phone has been popped up by the compression coil spring. Only at this time, the battery power is turned on. You can make free calls.
[0004]
In addition, in the device described in Japanese Patent Application Laid-Open No. 11-17793, the apparatus main body with a built-in speaker includes a microphone jack and a telephone jack, and an external microphone is connected to the microphone jack, and the telephone jack is portable via a cable. A telephone is connected, and a hands-free call can be made with an external microphone connected to a speaker inside the apparatus main body and the outside.
[0005]
Further, in the conventional example shown in FIG. 5, a telephone receiver 103 for detachably holding the mobile phone 102 is formed on the upper surface of the main body 101 of the hands-free call device, and the terminal cover 104 of the mobile phone 102 is opened to By connecting the plug 106 at the end of the coiled connection cord 105 on the 101 side to the input / output jack (input / output terminal) of the mobile phone 102, a speaker and a microphone (not shown) on the main body 101 side can be used for hands-free calling. Can be done.
[0006]
A conventional hands-free communication device including such a device always employs a method of electrically connecting a mobile phone to the device body via an input / output terminal of the mobile phone.
[0007]
[Problems to be solved by the invention]
However, in such a method of being electrically connected and used, it is necessary to connect the mobile phone and the hands-free call device every time it is used, for example, every time an automobile gets on and off. For this reason, there are many cases where the user does not actually use the device due to the troublesome connection even if the hands-free communication device exists. For this reason, it is difficult to say that conventional hands-free communication devices are effectively utilized in practice.
[0008]
On the other hand, as another conventional technique, there is a technique that enables a hands-free call by incorporating a circuit for increasing the sensitivity and speaker volume of a microphone into a mobile phone. In this conventional technique, the hands-free function is turned on / off by switching with a switch assigned to the mobile phone, so that there is a temporary effect if there is no troublesome connection.
[0009]
However, in actual use, the microphone of the mobile phone itself has a problem that it is difficult to input sound from a location away from the user. In order to solve this problem, when the input / output level of the audio signal is increased, a new problem that a howling phenomenon occurs occurs, and there is a case where a hands-free call cannot be performed.
[0010]
SUMMARY OF THE INVENTION An object of the present invention is to provide a hands-free call device that does not have the trouble of connecting a hands-free call device and a mobile phone, and enables a stable call.
[0011]
Another object of the present invention is to provide a hands-free communication device that can be used easily and in common, without being limited to the various shapes of mobile phone bodies, input / output terminal shapes, pin arrangements, and the like. It is in.
[0012]
[Means for Solving the Problems]
As shown in the block diagram of FIG. 1, the hands-free communication device of the present invention has terminal support bases 25A and 25B for detachably supporting the portable communication terminal 1, and an audio signal amplifier circuit. And an internal speaker 20 that is built in the apparatus main body 10 and faces the mouthpiece 8 when the mobile communication terminal 1 is supported by the terminal support bases 25A and 25B, and the apparatus main body. 10, an internal microphone 21 that faces the earpiece 7 when the mobile communication terminal 1 is supported by the terminal support bases 25 </ b> A and 25 </ b> B, and an audio signal amplifier circuit 12 that is provided outside the apparatus main body 1. The external microphone 15 connected to the internal speaker 20 via the same and the external microphone 15 is also provided outside the apparatus main body 10 and connected to the internal microphone 21 via the audio signal amplifier circuit 12. And an external speaker 14 to be continued.
[0013]
On the premise of such a basic configuration, the present invention is divided into two main bodies, the two main bodies are connected so as to be able to adjust the interval, and an internal speaker and an internal microphone are separately incorporated in these main bodies. In addition, the sound outlets of the internal speaker and the internal microphone are covered so that they can be freely opened and closed, and an open / close base plate that becomes a terminal support base when opened is mounted on each of the two divided main bodies. And
[0014]
In the embodiment, the two divided main bodies are connected by a distance adjusting screw.
[0015]
An audio signal amplifier circuit is built in one main body, and an external microphone and an external speaker can be connected to the audio signal amplifier circuit via a connection cord.
[0016]
An elastic pad may be provided around each of the sound outlet of the internal speaker and the sound outlet of the internal microphone.
[0017]
The external speaker and the external microphone can be an earphone microphone set in which an earphone and a small microphone are set.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in detail with reference to the drawings.
[0019]
FIG. 2 shows an example of a conventional folding mobile phone. The mobile phone 1 is composed of a front and back cover, a lower body 3 having a keyboard 2 disposed on the front cover, and an upper body 5 that is also composed of a front and back cover and is provided with a liquid crystal display unit 4 on the front cover. The earpiece 7 is connected to the front cover of the upper body 5, and the mouthpiece 8 is formed on the front cover of the lower body 3. Among the folding type mobile phones, the distance between the earpiece 7 and the mouthpiece 8 differs depending on the telephone, and among the main body-integrated mobile phones that are not folded, the distance between the earpiece and the mouthpiece differs depending on the telephone. The hands-free device according to the first embodiment of the present invention can be adapted to any of the folding type and the body-integrated type, and the distance between the earpiece and the mouthpiece is different. .
[0020]
In FIG. 3, the apparatus main body 10 is divided into block-shaped main and slave main bodies 10 </ b> A and 10 </ b> B, which are connected by two interval adjusting screws 11, and the interval adjusting screw 11 is turned from one end using a screwdriver or the like. Thus, the interval between the main bodies 10A and 10B can be adjusted.
[0021]
An audio signal amplifier circuit 12 is built in the main body 10A, a power connection cord 13 is drawn out, and an external speaker 14 and an external microphone 15 are detachably attached to a jack 18 on the front surface of the main body 10A through the connection cord 17. The external speaker 14 and the external microphone 15 are electrically connected to the audio signal amplifier circuit 12 in the main body 10A.
[0022]
Hollow screens 19A and 19B are erected on the upper surfaces of the two divided main bodies 10A and 10B. An internal speaker 20 is built in the screen 19A, and an internal microphone 21 is built in the screen 19B. An annular elastic pad 22 is attached around the sound passage opening. The internal speaker 20 is electrically connected to the external microphone 15 via the audio signal amplifier circuit 12, and the internal microphone 21 is electrically connected to the external speaker 14 via the audio signal amplifier circuit 12.
[0023]
Further, slide bases 23A and 23B are mounted on the upper surfaces of the main bodies 10A and 10B so as to be slidable back and forth toward the partitions 19A and 19B, respectively, and are spaced from the partitions 19A and 19B by front and rear adjustment screws 24, respectively. Can be adjusted individually.
[0024]
Opening and closing base plates 25A and 25B are hinged to the slide bases 23A and 23B by hinges 26, respectively. When the open / close base plate 25A is erected and attached to the front surface of the partition 19A, the sound passage of the internal speaker 20 is closed, and when the open / close base plate 25B is erected and attached to the front surface of the partition 19B, the sound outlet of the internal microphone 21 is closed. Close. On the other hand, when the opening / closing base plates 25A and 25B are opened and held in an inclined state or a horizontal state, the mobile phone 1 can be detachably placed sideways on the terminal support base portion. At that time, the interval between the main bodies 10A and 10B is adjusted so that the mouthpiece 8 of the mobile phone 1 faces the sound passage mouth of the internal speaker 20 and the earpiece 7 of the mobile phone 1 faces the internal microphone 21. The position of the slide bases 23A and 23B in the front-rear direction is adjusted.
[0025]
When the mobile phone 1 is thus placed on the open / close base plates 25A and 25B, as shown in FIG. 1, the sound from the earpiece 7 received by the mobile phone 1 is caught by the internal microphone 21, and the sound Amplified by the signal amplification circuit 12 and reproduced by the external speaker 14. On the other hand, the sound caught by the external microphone 15 is amplified by the sound signal amplifier circuit 12 and reproduced by the internal speaker 20, then received by the mobile phone 1 from the mouthpiece 8 of the mobile phone 1 and further carried by the mobile phone 1. Since it is transmitted from the telephone 1, a hands-free call can be made without connecting the mobile telephone 1 as in the prior art.
[0026]
FIG. 4 is a modification of FIG. 3 and uses an earphone microphone set 16 in which an earphone 14a and a small microphone 15a are set, and the earphone 14a is used as an external speaker and the small microphone 15a is used as an external microphone. .
[0027]
As mentioned above, although the Example which actualized this invention for foldable type | mold mobile phones was shown, it can respond | correspond easily that it is set as an object for integrated mobile phones, and also it is used as a foldable type and an integrated type. Of course, the present invention is not limited to a mobile phone but can be applied to other mobile communication terminals such as a mobile information terminal having a call function.
[0028]
【The invention's effect】
As described above, according to the present invention, the apparatus main body is divided into two main bodies, the two main bodies are connected so as to be adjustable in distance, and one of the main bodies is the internal speaker, and the other is the internal microphone. Is built in separately, so the distance between the internal speaker and the internal microphone can be adjusted, and the sound passages of the internal speaker and the internal microphone can be freely opened and closed. Since the open / close base plate is mounted on each of the two divided main bodies, it is not limited to various mobile phone body shapes, input / output terminal shapes, pin arrangements, etc. As a hands-free call device for a mobile communication terminal, it can be easily used in common for a wide variety of mobile communication terminals.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a hands-free call device according to the present invention.
FIGS. 2A and 2B show an example of a conventional folding mobile phone, in which FIG. 2A is a front view and FIG. 2B is a back view.
FIG. 3 is a perspective view of a hands-free call device according to an embodiment of the present invention.
FIG. 4 is a perspective view of a modified example thereof.
FIG. 5 is a perspective view of an example of a conventional hands-free call device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cellular phone 7 Earpiece 8 Mouthpiece 10 Main body 10A * 10B Master / main body 10C Main body 11 Space adjustment screw 12 Audio signal amplifier circuit 14 External speaker 15 External microphone 17 Connection cord 25A / 25B Opening / closing base plate

Claims (5)

  A device main body having a terminal support base part that detachably supports the mobile communication terminal and having a built-in audio signal amplifier circuit, and when the mobile communication terminal is supported by the terminal support base part. An internal speaker that faces the mouthpiece, is also built in the apparatus body, and is provided outside the apparatus body, an internal microphone that faces the earpiece when the mobile communication terminal is supported by the terminal support base, Hands-free comprising: an external microphone connected to the internal speaker via the audio signal amplifier circuit; and an external speaker that is also provided outside the apparatus body and is connected to the internal microphone via the audio signal amplifier circuit In the communication device, the device main body is divided into two main bodies, and the two main bodies are connected to each other so as to adjust the distance between them. And the internal microphone are separately incorporated, and the opening and closing base plate that covers the sound opening of the internal speaker and the internal microphone so as to be openable and closable and becomes the terminal support base when opened is divided. A hands-free call device, which is mounted on each of two main bodies.   The hands-free call device according to claim 1, wherein the two divided main bodies are connected by a distance adjusting screw.   3. A hands-free call device according to claim 1, wherein an audio signal amplifier circuit is built in one of the main bodies, and an external microphone and an external speaker are connected to the audio signal amplifier circuit via a connection cord. .   The hands-free call device according to claim 1, 2, or 3, wherein an elastic pad is provided around each of the sound outlet of the internal speaker and the sound outlet of the internal microphone.   The hands-free call device according to claim 1, 2, 3, or 4, wherein the external speaker and the external microphone are an earphone microphone set in which an earphone and a small microphone are set.

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