JP2006270617A - Connection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection device capable of amplifying an audio signal output from a portable telephone to a voltage in accordance with the input sensitivity of an audio apparatus. <P>SOLUTION: The audio signal and dc power are input from an input cable 30 connected to the portable telephone 10, the inputted audio signal is amplified with an amplifying section 40 by using the input dc power, and the amplified audio signal is output from an output cable 50 connected to the audio apparatus 20. Moreover, the amplifying portion 40 is provided with a changeover switch 41 for performing changeovers between a BOOST mode in which the input audio signal is amplified and output with an amplifier 43, and a PASS mode in which the inputted audio signal is outputted directly without being processed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a connection device that connects a mobile phone and an audio device, and in particular, connects a mobile phone having a function of reproducing an audio signal to an audio device that outputs an input audio signal to a sound output or recording medium. It relates to the connection device.

  In recent years, mobile phones having a communication function have become more and more multifunctional, and there is an increasing demand for enjoying music using a mobile phone having a function of reproducing an audio signal (see, for example, Patent Document 1).

  However, since listening to music on a mobile phone is generally based on the premise that an earphone connected directly to the mobile phone is used, the audio signal output from the mobile phone has a low voltage.

Therefore, in the prior art, when a mobile phone is connected to an audio device having a general analog input terminal to enjoy music, the output of the mobile phone becomes a small voltage with respect to the input sensitivity of the audio device. Therefore, the audio level output by the audio device becomes very low, and when recording on a recording medium with the audio device, the level is too low and the dynamic range and S / N ratio are sufficiently high. There was a problem that only a record was possible.
Japanese Patent Laid-Open No. 2004-72498

  The present invention has been made in view of such problems, and an object of the present invention is to provide a connection device that can amplify an audio signal output from a mobile phone to a voltage corresponding to the input sensitivity of an audio device. The point is to provide.

In order to solve the above problems, the present invention has the following configurations.
The connection device of the present invention is a connection device for connecting a mobile phone having a function of reproducing an audio signal and an audio device for recording the input audio signal to an audio output or a recording medium, and is played back by the mobile phone. An input cable for inputting the received audio signal and a DC power source supplied from the mobile phone, and an amplifying means for amplifying the audio signal input from the input cable using the DC power source input from the input cable; And an output cable for outputting the audio signal amplified by the amplification means to the audio device.

  The connection device of the present invention is a connection device for connecting a mobile phone having a function of reproducing an audio signal and an audio device for recording the input audio signal to an audio output or recording medium. An input cable for inputting the audio signal reproduced in the above, an amplifying means for amplifying the audio signal inputted from the input cable, an audio signal amplified by the amplifying means being output to the audio equipment, and the audio equipment And an amplifying means for amplifying an audio signal using the direct current power input from an output cable connected to the audio device.

  Further, the connection device of the present invention includes a boosting unit that boosts the voltage of the DC power source input from the input cable, and the amplifying unit uses the DC power source boosted by the boosting unit. An audio signal input from a cable is amplified.

  Further, the connection device of the present invention comprises switching means for switching between a BOOST mode for amplifying an input audio signal by the amplifying means and outputting it, and a PASS mode for directly outputting the input audio signal without processing. It is characterized by doing.

  Furthermore, the connection device of the present invention is characterized by comprising output voltage adjusting means for adjusting the amplification factor of the audio signal output from the output cable.

  The connection device of the present invention inputs an audio signal and a DC power source from an input cable connected to a mobile phone, amplifies the input audio signal using the input DC power source, and amplifies it from an output cable connected to an audio device By configuring the audio signal to be output, the audio signal output from the mobile phone can be amplified to a voltage according to the input sensitivity of the audio device, and the audio device can output the sound at an appropriate sound level. In addition, the recording can be performed with sufficient dynamic range and S / N ratio.

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

(First embodiment)
FIG. 1 is an external view showing the external configuration of the first embodiment of the connection device according to the present invention, and FIG. 2 is a block diagram showing the configuration of the amplifying unit shown in FIG.

  The first embodiment is a connection device that connects a mobile phone 10 having a function of reproducing an audio signal and an audio device 20 having a function of outputting and recording the input audio signal as shown in FIG. Referring to the input cable 30 connected to the mobile phone 10, the amplifier 40 connected to the input cable 30, and the output cable 50 connecting the amplifier 40 and the audio device 20.

  The mobile phone 10 has a function of making a call with another mobile phone via a communication network, a function of taking in and storing music data from a communication network or a personal computer, and playing back the stored music data and outputting an audio signal. It has a function and a function of supplying DC power to the outside, and an analog output terminal for audio signals and a power terminal for DC power are provided. Note that the output of the audio signal in the mobile phone 10 is a small voltage with respect to the input sensitivity of the audio device 20.

  The audio device 20 is, for example, an MD component or a speaker system having an analog input terminal, and has a function of outputting an input audio signal as a sound and a function of recording the input audio signal on a recording medium such as an MD.

  The input cable 30 is connected to the analog output terminal and the power supply terminal of the mobile phone 10, and referring to FIG. 2, the left and right audio signals and the DC power are input to the amplifying unit 40, the GND of the mobile phone 10, The GND of the amplifying unit 40 is connected.

  1 and 2, the amplifying unit 40 includes a pair of changeover switches 41, a volume 42 and an amplifier 43 provided corresponding to the left and right audio signals, a regulator for boosting the input DC power source, and the like. Boosting unit 44.

  The changeover switch 41 is a switch for switching between a BOOST mode for amplifying and outputting an input audio signal and a PASS mode for directly outputting the input audio signal without processing. In the example shown in FIG. When connected to the contact, the BOOST mode is set. When connected to the p-contact, the PASS mode is set.

  The volume 42 is voltage adjusting means for adjusting the voltage of the audio signal input from the input cable 30 when the changeover switch 41 is set to the BOOST mode.

  The amplifier 43 is an amplifying unit that amplifies the audio signal adjusted by the volume 42 using the DC power source boosted by the boosting unit 44. Accordingly, the volume 42 functions as an amplification factor adjusting unit that adjusts the amplification factor of the audio signal output from the output cable 50 when the changeover switch 41 is set to the BOOST mode.

  The output cable 50 is connected to the analog input terminal of the audio device 20, and referring to FIG. 2, when the changeover switch 41 is set to the BOOST mode, the left and right audio signals amplified by the amplifier 43 are transmitted to the audio device. When the changeover switch 41 is set to the PASS mode, the left and right audio signals input from the mobile phone 10 are output to the audio device 20 without being processed.

  As described above, according to the first embodiment, the audio signal and the DC power source are input from the input cable 30 connected to the mobile phone 10, and the DC power source to which the audio signal input by the amplifying unit 40 is input. The audio signal output from the mobile phone 10 is set to a voltage corresponding to the input sensitivity of the audio device 20 by using the output cable 50 connected to the audio device 20 and outputting the amplified audio signal. The audio device 20 can output the sound at an appropriate sound level, and can perform recording with sufficient dynamic range and S / N ratio.

  In the first embodiment, the mobile phone 10 is configured to receive the DC power supply. However, when the output cable 50 is connected to the audio device 20 having a function of supplying the DC power, The DC power supplied from the device 20 may be input from the output cable 50 to the booster 44.

(Second Embodiment)
FIG. 3 is an external view showing the external configuration of the second embodiment of the connection device according to the present invention, and FIG. 4 is a diagram showing the functions assigned to the selection switch shown in FIG.

  As shown in FIG. 3, the amplification unit 60 of the second embodiment is provided with a selection switch 61. The selection switch 61 is a switch that selects the amplification factor of the input left and right audio signals, and is configured to be able to select any one switch according to the type of the mobile phone 10. That is, since there are various types of cellular phones 10 and there are variations in the voltage value of the output audio signal and there is a cell phone 10 that does not have a function of supplying DC power, the input cable 30 is connected. A plurality of amplification factors are set in advance according to the type of the target mobile phone 10 to be processed.

  In the second embodiment, as shown in FIG. 4, when the amplification factors corresponding to the types A to D of the mobile phone 10 are preset and the types A to C are selected by the selection switch 61. The changeover switch 41 is connected to the b contact to set the BOOST mode, and the value of the volume 42 is adjusted to a different value for each of the types A to C. When the type D is selected by the selection switch 61, the changeover switch 41 is connected to the p-contact and the PASS mode is set.

  As described above, according to the second embodiment, one of a plurality of amplification factors preset by the selection switch 61 is selected according to the type of the mobile phone 10 to which the input cable 30 is connected. With this configuration, it is possible to easily set an appropriate amplification factor according to the type of the mobile phone 10 to which the input cable 30 is connected.

  Note that the present invention is not limited to the above-described embodiments, and it is obvious that the embodiments can be appropriately changed within the scope of the technical idea of the present invention. In addition, the number, position, shape, and the like of the constituent members are not limited to the above-described embodiment, and can be set to a suitable number, position, shape, and the like in practicing the present invention. In each figure, the same numerals are given to the same component.

It is an external view which shows the external appearance structure of 1st Embodiment of the connection apparatus which concerns on this invention. It is a block diagram which shows the structure of the amplification part shown in FIG. It is an external view which shows the external appearance structure of 2nd Embodiment of the connection apparatus which concerns on this invention. It is a figure which shows the function allocated to the selection switch shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Mobile phone 20 Audio equipment 30 Input cable 40 Amplification part (1st Embodiment)
41 switch 42 volume 43 amplifier 44 booster 50 output cable 60 amplifying unit (second embodiment)
61 selection switch

Claims (5)

A connection device for connecting a mobile phone having a function of reproducing an audio signal and an audio device for recording an input audio signal on an audio output or recording medium,
An input cable for inputting an audio signal reproduced by the mobile phone and a DC power supplied from the mobile phone;
Amplifying means for amplifying an audio signal input from the input cable using the DC power source input from the input cable;
And an output cable for outputting the audio signal amplified by the amplification means to the audio device. A connection device for connecting a mobile phone having a function of reproducing an audio signal and an audio device for recording an input audio signal on an audio output or recording medium,
An input cable for inputting an audio signal reproduced by the mobile phone;
Amplifying means for amplifying the audio signal input from the input cable;
An audio signal amplified by the amplifying means is output to the audio device, and an output cable for inputting a DC power supplied from the audio device is provided.
The amplifying unit amplifies an audio signal using the DC power source input from an output cable connected to the audio device. Boosting means for boosting the voltage of the input DC power supply;
3. The connection device according to claim 1, wherein the amplifying unit amplifies an audio signal input from the input cable using the DC power source boosted by the boosting unit.   2. A switching means for switching between a BOOST mode in which an input audio signal is amplified and output by the amplifying means and a PASS mode in which the input audio signal is directly output without being processed. The connection device according to any one of 1 to 3.   5. The connection device according to claim 1, further comprising output voltage adjusting means for adjusting an amplification factor of the audio signal output from the output cable.

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