JP2003319485A - Data transmission cord, data transmission head and headphone - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform wired transmission of low power consumption normally and to perform wireless transmission when data transmission exceeding the arriving range of a cord is required. <P>SOLUTION: The data transmission system comprises a data transfer cord 1 for connecting a music player with a headphone, parts 2a and 2b for separating a transmission cord into one and the other cords and connecting them removably, wireless communication means provided in the music player and the headphone, respectively, a means for detecting separation/connection of the transmission cord, and a means for making a switch from wired transmission to wireless transmission when separation of the transmission cord is detected. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transfer code for transferring data between devices, a data transmission system and headphones.

[0002]

2. Description of the Related Art With the expansion of functions of information terminals, the situation in which data is transmitted between portable information terminals and devices such as personal computers (PCs) is increasing. For example, in data transfer between a PDA and a PC, wireless data transmission is used in addition to wired data transmission. Also, C
In a music reproducing terminal for reproducing data recorded in D, MD, etc., in addition to wired headphones, headphones for reproducing wirelessly transmitted data are also used.

By the way, when data transmission between the PDA and the PC or data transmission between the music reproducing terminal and the headphones is performed by wire, the data can be transmitted only within the reach of the code. Furthermore, if the code is lost during the data transmission between the PDA and the PC, the data transmission needs to be performed from the beginning, and thus data transmission while moving is difficult. Further, although data transmission between the music reproducing terminal and the headphones does not cause any trouble even if the cord is pulled out, pulling the cord puts a strain on the human ear and causes discomfort.

On the other hand, in the case of wireless data transmission, although the transmission range is widened, there is a problem that the information terminal cannot be driven for a long time by a battery because of the large power consumption.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and when it is necessary to perform data transmission over a wire which normally consumes less power and to exceed the reach of a code. It is an object of the present invention to provide a code for data transmission, a data transmission system, and headphones that can perform wireless transmission.

[0006]

A data transmission code of the present invention is a data transfer code for performing data transfer between devices, wherein the transmission code is separated into one code and the other code, Connecting means for detachably connecting the cords to each other, wireless communication means provided on the one cord and the other cord, detecting means for detecting separation / connection of the transmitting cords, and the transmitting cords by the detecting means Switching means for switching from wired transmission to wireless transmission by the wireless communication means when the separation is detected.

The data transmission system of the present invention is a data transfer system for transferring data between devices,
A data transfer code for connecting between the devices, a connection means for separating the transmission code into one code and the other code and detachably connecting the codes, and wireless communication provided in each of the devices. Means, detection means for detecting separation / connection of the transmission code, and switching means for switching from wire transmission to wireless transmission by the wireless communication means when the detection means detects separation of the transmission code. , Are provided.

Further, the data transmission system of the present invention is a data transfer system for performing data transfer between a music reproducing device and headphones, and a data transfer cord for connecting the music reproducing device and the headphones. Separating the transmission code into one code and the other code,
Connection means for detachably connecting the cords to each other, wireless communication means provided in the music playback device and the headphone, detection means for detecting separation / connection of the transmission cords, and transmission by the detection means Switching means for switching from wired transmission to wireless transmission by the wireless communication means when separation of the code for use is detected.

The headphone of the present invention is a headphone for reproducing music data transmitted from a music reproducing device, and includes a data transmission cord for connecting the music reproducing device and the headphone, and the transmission cord. Connection means for separating one cord and the other cord and detachably connecting the cords to each other, and wireless communication means respectively provided for the music reproducing device and the transmission cord,
A detection means for detecting separation / connection of the transmission code,
Switching means for switching from wired transmission to wireless transmission by the wireless communication means when the detection means detects the separation of the transmission code.

According to the above construction, the transmission cord is separated into one cord and the other cord, and the connecting cords are detachably connected to each other, and it is detected that the transmission cord is separated. However, by switching the transmission mode from wired transmission to wireless transmission, normally wired transmission with low power consumption is performed, and if it is necessary to perform data transmission beyond the reach of the code, perform wireless transmission. Will be possible.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In the following embodiments, digital audio transmission will be described as an example of data transmission. In all the drawings for explaining the embodiments, the same reference numerals are given to those having the same function.

FIG. 1 is a schematic view showing the appearance of a data transmission code according to the first embodiment of the present invention. FIG. 1 shows a state in which a music reproducing device and headphones are connected by the data transmission cord of the first embodiment.
The detachable portion 2 at the central portion of the data transmission cord 1 is detached, and is separated into a cord 1a connected to the data transmission side and a cord 1b connected to the data reception side. Detachable part 2a,
2b is composed of a flat magnet or velcro tape, etc., so that when a slight tension is applied, both 2a and 2b are easily separated.

FIG. 2 is a block diagram showing the internal structure of the data transmission code shown in FIG. A cord 1a connected to the data transmission side with the detachable portion 2 in the center as a boundary is composed of a memory 3 and a memory 4, a wireless transmission means 5, a connection detection means 6, and a digital / analog converter 7. The cord 1b connected to the data receiving side includes a wireless receiving unit 8, a connection detecting unit 9, a digital / analog converter 10, and a switch 11. The memory 3 and the memory 4 are for temporarily storing input data, and the route from the memory 4 to the digital / analog converter 7 is a wired transmission, and branches from between the memory 3 and the memory 4,
The route to the wireless transmission means 5 becomes the data transmission route of wireless transmission. The wireless transmission unit 5 is a unit for wirelessly transmitting the data output from the memory 3, and performs processing such as data compression and transmission.

The connection detecting means 6 and 9 are provided in the detachable portion 2
It is a detector for detecting whether or not is attached or detached. It is a known detector such as a detection using a potential difference of a DC potential superimposed on a data path, a detection using a current flowing in a dedicated line provided separately from the data path. The method detects the connection and switches between wired and wireless transmission. The digital / analog converters 7 and 10 perform digital / analog conversion of data for wire transmission and wireless transmission.

The wireless receiving means 7 is a unit for receiving data wirelessly transmitted, and performs processing such as reception and decompression of compressed data. The switch 10, under the control of the connection detecting means 9, switches the transmission path of the data to be output to the headphones.

Next, the operation of the data transmission code will be described by taking as an example the case where data is transmitted from the music reproducing device to the headphones. First, the digital audio data sent from the music reproducing device reaches the memory 3.
The data that has passed through the memory 3 is transmitted to the memory 4 in the case of wired transmission and to the wireless transmission means 5 in the case of wireless transmission.

Switching between wired transmission and wireless transmission is
The connection detecting means 6 detects the attachment / detachment state of the detachable portion 2 to perform the operation. That is, when the removable unit 2 is connected, wired transmission is selected, and when disconnected, wireless transmission is selected.

When the wired transmission is selected, the data passes from the memory 3 to the memory 4, is converted into an analog signal by the digital / analog converter 7, passes through the detachable unit 2 and the switch 11, and reaches the headphones. .

On the other hand, when the wireless transmission is selected, the data is directly transmitted from the memory 3 to the wireless transmission means 5, and is compressed by data and transmitted by wireless. The transmitted data is received and restored by the wireless reception means 8. Similarly, it is converted into an analog signal by the digital / analog converter 10, and the switch 1
Pass 1 to reach the headphones.

In the case of wireless transmission, a slight transmission delay occurs by the time required for processing such as data compression, as compared with wired transmission. Therefore, for example, when the code for data transmission is detached during the reproduction of music and the wired transmission is switched to the wireless transmission, the sound is interrupted. The memory 4 is inserted in the middle of the wired transmission path to compensate for this delay time, and if the time required for passing through the memory 4 is the same as the delay time, even if the wired transmission switches to the wireless transmission, It can be adjusted so that no interruption occurs.

Therefore, for example, when still image data or character data is transmitted between the PC and the PDA using the data transmission code of the first embodiment, simultaneous data reproduction is performed at the time of switching from wired transmission to wireless transmission. In the code for data transmission used in a situation that does not particularly require the characteristics, it is possible to omit the memory and the digital / analog converter.

The detachable portion 2 may have any structure other than the magnet and the Velcro tape as long as it is detachable.

Further, the digital / analog converter 7 is
The code may be provided on the data receiving side and shared with the digital / analog converter 10.

FIG. 3 is a block diagram showing the internal structure of the data transmission code according to the second embodiment of the present invention. Compared with the above-mentioned data transmission code, switches 12 and 13 are added to the wireless transmission path between the wireless transmission means 5 and the wireless reception means 8. The switches 12 and 13 are connected to the connection detecting means 6 and 9, respectively.
Under the control of 1., the compressed data that has passed through the wireless transmission means 5 is bypassed to the wired transmission path, and similarly, the compressed data that has bypassed the wired transmission path is switched to the wireless reception means. . Other configurations and functions are the same as those in the first embodiment, and therefore description thereof will be omitted.

Next, the operation of the data transmission code according to the second embodiment will be described by taking the case where data is transmitted from the music reproducing device to the headphones as an example. Wireless transmission means 5
And the wireless receiving means 8 needs to perform the synchronization processing of the transmitting side and the receiving side at a predetermined interval in the standby state.

In the synchronization processing, normally, wireless transmission is performed from the wireless transmission means 5 to the wireless reception means 8 to establish synchronization, but in the second embodiment, at the synchronization timing, the connection detection means 6 and the connection detection means. Switch 12 by the control of 9
And the switch 13 is connected to the route of the wired transmission, and the synchronization processing is performed by the wireless transmission means 5, the switch 12, the detachable unit 2,
It is executed by a route that follows the switch 13 and the wireless reception means 8.

Therefore, since the synchronization processing is executed not by radio but by a wired transmission path, the synchronization processing can be executed with low power consumption. The other operations are similar to those of the first embodiment, and thus the description thereof will be omitted.

Note that, for example, when still image data or character data is transmitted between the PC and the PDA using the data transmission code of the second embodiment, simultaneous data reproduction is performed at the time of switching from wired transmission to wireless transmission. In the code for data transmission used in a situation that does not particularly require the characteristics, it is possible to omit the memory and the digital / analog converter.

Further, the detachable part 2 may have any structure other than a magnet or a velcro tape as long as it is detachable.

Further, the digital / analog converter 7 is
The code may be provided on the data receiving side and shared with the digital / analog converter 10.

FIG. 4 is a block diagram showing the internal structure of a data transmission system according to the third embodiment of the present invention. The music reproducing device 30 and the headphones 40 are connected by the data transmission cord 20. The detachable portion 2 at the central portion of the data transmission cord 20 is detached to separate the cord for connecting to the data transmitting side and the cord for connecting to the data receiving side. The detachable part 2 is composed of a flat magnet or a velcro tape, etc., and both are easily separated when a slight tension is applied.

The music reproducing device 30 connected to the data transmitting side of the data transmitting cord 20 is composed of a memory 3 and a memory 4, a wireless transmitting means 5, a connection detecting means 6 and a digital / analog converter 7. Data transmission code 20
The headphone 40 connected to the data receiving side of is composed of a wireless receiving unit 8, a connection detecting unit 9, a digital / analog converter 10, a switch 11, and an audio output unit 14.

The memory 3 and the memory 4 are for temporarily storing input data, and the route going from the memory 4 to the digital / analog converter 7 is a wired transmission. The route to the transmitting means 5 becomes the data transmission route of wireless transmission. The wireless transmission unit 5 is a unit for wirelessly transmitting the data output from the memory 3, and performs processing such as data compression and transmission.

The connection detecting means 6 and 9 are detectors for detecting whether or not the detachable portion 2 of the data transmission cord 20 is attached or detached. The connection detecting means 6 and 9 superimpose a DC potential on the data path and detect the potential difference. The connection is detected by a known method such as performing, and wired transmission or wireless transmission is switched. The digital / analog converters 7 and 10 perform digital / analog conversion of data for wire transmission and wireless transmission.

The wireless receiving means 8 is a unit for receiving the wirelessly transmitted data and performs processing such as reception and decompression of compressed data. The switch 11 receives the control from the connection detecting means 9 and switches the transmission path of the data to be output to the audio output unit 14. The voice output unit 14 outputs the input data as voice.

Next, the operation of the data transmission system of this embodiment will be described. First, the digital data of the music reproducing device is sent to the memory 3. The data that has passed through the memory 3 is transmitted to the memory 4 in the case of wired transmission and to the wireless transmission means 5 in the case of wireless transmission. The connection detection means 6 detects the attachment / detachment state of the detachable portion 2 to switch between wired transmission and wireless transmission. That is, when the detachable portion 2 of the data transmission cord 20 is connected, wired transmission is selected, and when detachable, wireless transmission is selected.

When wired transmission is selected, the data passes from the memory 3 to the memory 4, is converted into an analog signal by the digital / analog converter 7, and the data transmission code 20 is used.
Through the switch 11 of the headphone 40,
The audio output unit 14 is reached.

On the other hand, when the wireless transmission is selected, the data is directly transmitted from the memory 3 to the wireless transmission means 5, compressed, and wirelessly transmitted to the headphone 40. The transmitted data is received and restored by the wireless receiving means 8 of the headphones 40. Similarly, the digital / analog converter 10
Is converted into an analog signal, and the sound is reproduced by the sound output unit 14 after passing through the switch 11.

In the case of wireless transmission, a slight transmission delay occurs as compared with wired transmission by the time required for processing such as data compression. Therefore, for example, when the code for data transmission is detached during the reproduction of music and the wired transmission is switched to the wireless transmission, the sound is interrupted. The memory 4 is inserted in the middle of the wired transmission path to compensate for this delay time, and if the time required for passing through the memory 4 is the same as the delay time, even if the wired transmission switches to the wireless transmission, It can be adjusted so that no interruption occurs.

Therefore, for example, the data transmission side device (P
C) and the device on the data receiving side (PDA), such as when transmitting still image data or character data, is used in a situation that does not particularly require simultaneity of data reproduction when switching from wired transmission to wireless transmission. If it is a data transmission system, it is possible to omit the memory and the digital / analog converter.

Further, the detachable portion 2 may have any structure other than the magnet and the Velcro tape as long as it is detachable.

Further, the digital / analog converter 7 is
It may be provided on the headphone 40 side and shared with the digital / analog converter 10.

FIG. 5 is a block diagram showing the internal structure of the data transmission system according to the fourth embodiment of the present invention. Compared to the third embodiment, switches 12 and 13 are added to the wireless transmission path between the wireless transmission means 5 of the music reproducing device 30 and the wireless reception means 8 of the headphones 40.

The switch 12 of the music reproducing device 30 and the switch 13 of the headphone 40 are under the control of the connection detecting means 6 of the music reproducing device 30 and the connection detecting means 9 of the headphone 40, and the compressed data that has passed through the wireless transmission means 5. Is bypassed to the wired transmission path, and similarly, the switching for guiding the compressed data bypassing the wired transmission path to the wireless receiving means is performed. Other configurations and functions are the same as those in the third embodiment, and therefore description thereof will be omitted.

Next, the operation of the data transmission system according to the fourth embodiment will be described. The wireless transmitting means 5 of the music reproducing device 30 and the wireless receiving means 8 of the headphones 40 are
In the standby state, it is necessary to perform synchronization processing between the transmitting side and the receiving side at a predetermined interval.

In the synchronization process, normally, wireless transmission is performed from the wireless transmission means 5 to the wireless reception means 8 to establish synchronization. In the fourth embodiment, the connection detection means 6 of the music reproducing device 30 and the headphone 40 are connected. The switch 12 and the switch 1 which are connected to the route of the wired transmission under the control of the detection means 9
3, the synchronization processing is performed by the wireless transmission means 5 and the switch 1.
2, the data transmission code 20, the switch 13, and the wireless reception means 8 are executed. Therefore, since the synchronization process is executed by a wired transmission path instead of wirelessly, the synchronization process can be executed with low power consumption. The other operations are similar to those of the third embodiment, and therefore the description thereof is omitted.

Note that, for example, when still image data or character data is transmitted between the data transmission side device (PC) and the data reception side device (PDA), the simultaneity of data reproduction at the time of switching from wired transmission to wireless transmission. If the data transmission system is used in a situation that does not require the above, it is possible to omit the memory and the digital / analog converter.

The detachable portion 2 may have any structure other than the magnet and the Velcro tape as long as it is detachable.

Further, the digital / analog converter 7 is
It may be provided on the headphone 40 side and shared with the digital / analog converter 10.

FIG. 6 is a block diagram showing the internal structure of the data transmission system according to the fifth embodiment of the present invention. Compared to the fourth embodiment, the music reproducing device 30 and the headphone 40 each have a power supply 15 and a secondary battery 16 added thereto. Other configurations and functions are the same as those in the fourth embodiment, and therefore description thereof will be omitted.

Next, the operation of the data transmission system of the fifth embodiment will be described. During wired transmission of data, the secondary battery 16 of the headphone 40 is supplied with power from the power supply 15 of the music reproducing device 30 via the data transmission cord 20. Electric power is supplied from the secondary battery 16 to each part of the headphone 40. The other operations are similar to those of the third embodiment, and therefore the description thereof is omitted.

Note that, for example, when still image data or character data is transmitted between the data transmission side device (PC) and the data reception side device (PDA), the simultaneity of data reproduction at the time of switching from wired transmission to wireless transmission. If the data transmission system is used in a situation that does not require the above, it is possible to omit the memory and the digital / analog converter.

The detachable portion 2 may have any structure other than the magnet and the Velcro tape as long as it is detachable.

Further, the digital / analog converter 7 is
It may be provided on the headphone 40 side and shared with the digital / analog converter 10.

Here, the operation flow of the data transmission system of the fifth embodiment will be described with reference to the flowchart of FIG. When the switch of the music reproducing device 30 is turned on, initialization of the wireless unit is executed between the wireless transmitting means 5 of the music reproducing device 30 and the wireless receiving means 8 of the headphones 40 (step S101). At this time, synchronization between the transmitter and the receiver is also performed.

Next, the connection detection means 6 and the connection detection means 9 are checked to check the attachment / detachment state of the detachable portion 2 (step S102). Step S10
If it is detected in step 3 that the headphones 40 are in the wired connection state, the wired transmission mode is set, and step S102 is performed.
Return to.

On the other hand, when it is detected that the detachable unit 2 is detached, the wireless unit is enabled (step S10).
4), establish a wireless transmission path (step S10)
5). Then, in step S106, the attachment / detachment state of the detachable unit 2 is checked. If it is detected in step S107 that the headphones 40 are in the wired connection state, a wired transmission path is established (step S108), and the wireless unit is set to the low power consumption mode (standby state) (step S107).
109) Return to step S102. On the other hand, detachable part 2
If it is detected that the device has been detached, the wireless transmission mode is set, and the process returns to step S106.

The headphones of the present invention will be described below. The headphone of the present invention is a headphone to which a data transmission cord is attached, and the headphone and the data transmission cord realize the function of the data transmission system of the present invention to switch between wireless transmission and wired transmission, or a general-purpose headphone. The data transmission cord of the present invention is attached to switch between wired transmission and wireless transmission. Hereinafter, a case where the function of the data transmission system of the present invention is realized by the headphones and the data transmission cord will be described with reference to FIGS. 8 and 9.

FIG. 8 is a block diagram showing the internal structure of a headphone according to the sixth embodiment of the present invention. The data transmission cord 50 extends from the headphones. The data transmission cord 50 is separated into a cord connected to the data transmission side and a cord connected to the data reception side by detaching and attaching the detachable portion 2 at the center. To do.

The detachable portion 2 is composed of a flat magnet or a velcro tape, etc., and is easily separated from each other when a slight tension is applied. The data transmission code 50 is composed of the memory 3 and the memory 4, the wireless transmission means 5, the connection detection means 6, and the digital / analog converter 7.

The headphone 60 comprises a radio receiving means 8, a connection detecting means 9, a digital / analog converter 10, a switch 11 and an audio output section 14. The memory 3 and the memory 4 are for temporarily storing input data, and the route from the memory 4 to the digital / analog converter 7 is a wired transmission, and branches from between the memory 3 and the memory 4,
The route to the wireless transmission means 5 becomes the data transmission route of wireless transmission.

The wireless transmission means 5 is a unit for wirelessly transmitting the data output from the memory 3, and performs processing such as data compression and transmission. The connection detecting means 6 and 9 are
A detector for detecting whether or not the detachable part 2 of the data transmission cord 20 is attached / detached. The connection is detected by a known method such as superimposing a DC potential on the data path and detecting the potential difference. , Wired transmission or wireless transmission switching. The digital / analog converters 7 and 10 are
Performs digital / analog conversion of data for wire transmission and wireless transmission. The wireless receiving unit 7 is a unit for receiving wirelessly transmitted data, and performs processing such as reception and decompression of compressed data. The switch 10, under the control of the connection detecting means 9, switches the transmission path of the data to be output to the audio output unit 14. The voice output unit 14
The input data is output as voice.

Next, the operation of the headphones of the sixth embodiment will be described. First, the digital data of the music reproducing device is sent to the memory 3. The data that has passed through the memory 3 is transmitted to the memory 4 in the case of wired transmission and to the wireless transmission means 5 in the case of wireless transmission. The connection detection means 6 detects the attachment / detachment state of the detachable portion 2 to switch between wired transmission and wireless transmission. That is, the data transmission code 50
Wired transmission is selected when the removable unit 2 is connected, and wireless transmission is selected when the removable unit 2 is connected.

When the wired transmission is selected, the data passes from the memory 3 to the memory 4, is converted into an analog signal by the digital / analog converter 7, passes through the detachable section 2, and the switch 11 of the headphone 60 is switched. It passes through and reaches the audio output unit 14.

On the other hand, when the wireless transmission is selected, the data is directly transmitted from the memory 3 to the wireless transmission means 5, compressed, and wirelessly transmitted to the headphone 60. The transmitted data is received and restored by the wireless reception means 8 of the headphone 60. Similarly, the digital / analog converter 10
Is converted into an analog signal, and the sound is reproduced by the sound output unit 14 after passing through the switch 11.

The detachable portion 2 may have any structure other than the magnet and the Velcro tape as long as it is detachable.

The digital / analog converter 7 may be provided on the headphone 60 side and shared with the digital / analog converter 10.

FIG. 9 is a block diagram showing the internal structure of the headphone according to the seventh embodiment of the present invention. Compared to the sixth embodiment described above, switches 12 and 13 are added to the wireless transmission path between the wireless transmission means 5 of the data transmission code 50 and the wireless reception means 8 of the headphones 60. .

The switch 12 of the data transmission cord 50 and the switch 13 of the headphone 60 pass through the wireless transmission means 5 under the control of the connection detection means 6 of the data transmission cord 50 and the connection detection means 9 of the headphone 60. Switching for bypassing the compressed data to the wired transmission path and similarly guiding the compressed data bypassing the wired transmission path to the wireless receiving means is performed.
Other configurations and functions are similar to those of the sixth embodiment, and therefore description thereof is omitted.

Next, the operation of the headphones of the seventh embodiment will be described. The wireless transmission means 5 of the data transmission code 50 and the wireless reception means 8 of the headphones 60 are
In the standby state, it is necessary to perform synchronization processing between the transmitting side and the receiving side at a predetermined interval.

In the synchronization processing, normally, wireless transmission is performed from the wireless transmission means 5 to the wireless reception means 8 to establish synchronization, but in the seventh embodiment, at the synchronization timing, the connection detection of the data transmission code 50 is detected. Means 6 and headphones 6
A path through which the switch 12 and the switch 13 are connected to the wired transmission path under the control of the connection detection means 9 of 0, and the synchronization processing follows the wireless transmission means 5, the switch 12, the detachable unit 2, the switch 13, and the wireless reception means 8. Run on. Therefore, since the synchronization process is executed by a wired transmission path instead of wirelessly, the synchronization process can be executed with low power consumption. The other operations are similar to those of the sixth embodiment, and therefore the description thereof will be omitted.

The detachable portion 2 may have any structure other than the magnet and the Velcro tape as long as it is detachable.

Further, the digital / analog converter 7 may be provided on the headphone 60 side and shared with the digital / analog converter 10.

[0074]

As described above, according to the present invention, the transmission code is separated into one code and the other code,
Equipped with a connecting means to connect the cords to each other in a detachable manner, it detects that the cords for transmission are separated, and switches the transmission form from wired transmission to wireless transmission, which normally transmits by wire with low power consumption. When it is necessary to perform data transmission beyond the reach of the code, it becomes possible to perform wireless transmission.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an appearance of a data transmission code according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing an internal configuration of a data transmission code according to the first embodiment of the present invention.

FIG. 3 is a block diagram showing an internal configuration of a data transmission code according to the second embodiment of the present invention.

FIG. 4 is a block diagram showing an internal configuration of a data transmission system according to a third embodiment of the present invention.

FIG. 5 is a block diagram showing an internal configuration of a data transmission system according to a fourth embodiment of the present invention.

FIG. 6 is a block diagram showing an internal configuration of a data transmission system according to a fifth embodiment of the present invention.

FIG. 7 is a flowchart showing an operation flow of the data transmission system according to the fifth embodiment of the present invention.

FIG. 8 is a block diagram showing an internal configuration of a headphone according to a sixth embodiment of the present invention.

FIG. 9 is a block diagram showing an internal configuration of a headphone according to a seventh embodiment of the present invention.

[Explanation of symbols]

1 Data transmission code 2 Detachable part 5 Wireless transmission means 6 Connection detection means 8 Wireless reception means 1 Connection detection means

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shinichi Sugie             6-1, Fujimi, Tsurugashima City, Saitama Prefecture             Ionia Research Institute (72) Inventor Naoaki Horiuchi             6-1, Fujimi, Tsurugashima City, Saitama Prefecture             Ionia Research Institute (72) Inventor Masataka Izawa             6-1, Fujimi, Tsurugashima City, Saitama Prefecture             Ionia Research Institute (72) Inventor Kenji Nakamura             6-1, Fujimi, Tsurugashima City, Saitama Prefecture             Ionia Research Institute F term (reference) 5D005 BB11                 5D020 AC01

Claims (12)

[Claims] 1. A data transfer cord for performing data transfer between devices, wherein the transmission cord is separated into one cord and the other cord, and connecting means for detachably connecting the cords to each other. Wireless communication means respectively provided on one and the other code, detection means for detecting separation / connection of the transmission code, and when the detection means detects the separation of the transmission code, the transmission from the wired transmission is performed. A code for data transmission, comprising: switching means for switching to wireless transmission by wireless communication means. 2. The data transmission code according to claim 1, further comprising synchronization means for establishing synchronization of data when switching from the wired transmission to the wireless transmission. 3. The data according to claim 1, further comprising switching means for switching from wireless transmission to wired transmission by the wireless communication means when the detection means detects the connection of the transmission code. Code for transmission. 4. A data transfer system for transferring data between devices, wherein a data transfer code for connecting the devices and the transmission code are separated into one code and the other code, and the two are mutually separated. Connection means for detachably connecting the cord, wireless communication means provided in the device respectively, detection means for detecting separation / connection of the transmission code, and separation of the transmission code is detected by the detection means. And a switching unit for switching from wired transmission to wireless transmission by the wireless communication unit. 5. A data transfer system for transferring data between a music reproducing device and headphones, wherein a data transfer code for connecting the music reproducing device and the headphones and one of the transmission codes are used. Connection means for separating the other cord from each other and connecting the cords to each other in a detachable manner, wireless communication means respectively provided to the music reproducing device and the headphone, and detection for detecting separation / connection of the transmission cord. A data transmission system comprising: means and switching means for switching from wired transmission to wireless transmission by the wireless communication means when the detection means detects the separation of the transmission code. 6. The data transmission system according to claim 4, further comprising a synchronization unit that establishes synchronization of data when the wired transmission is switched to the wireless transmission. 7. The switching means for switching from wireless transmission to wired transmission by the wireless communication means when the connection of the transmission cord is detected by the detection means. Data transmission system. 8. A device in which power is supplied from a battery mounted in the music reproducing device to a secondary battery mounted in the headphone via the data transmission cord, and the secondary battery is mounted in the headphone. The data transmission system according to any one of claims 5 to 7, wherein the data transmission system is used as a power source. 9. A headphone for reproducing music data transmitted from a music reproducing device, the data transmitting cord connecting the music reproducing device and the headphone, and one cord of the transmitting cord and another cord of the transmitting cord. Connection means for separating the cords from each other and connecting the cords to each other in a detachable manner; wireless communication means respectively provided for the music reproducing device and the transmission cord; and detecting means for detecting separation / connection of the transmission cords. And a switching unit that switches from wired transmission to wireless transmission by the wireless communication unit when the detection unit detects separation of the transmission code. 10. The headphone according to claim 9, further comprising a synchronization unit that establishes synchronization of data when the wired transmission is switched to the wireless transmission. 11. The headphone according to claim 9, further comprising switching means for switching from wireless transmission to wired transmission by the wireless communication means when the detection means detects the connection of the transmission cord. . 12. A headphone provided with the data transmission cord according to claim 1.