JP3189913B2 - Jacks and electronics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jack and an electronic apparatus suitable for use in, for example, a small-sized magneto-optical disk apparatus for recording and reproducing audio signals on a magneto-optical disk.

[0002]

2. Description of the Related Art For example, in order to record / reproduce an audio signal on / from a recording medium, a cable is connected to another electronic device to transmit / receive the audio signal.
Between electronic devices, a cable for receiving a signal includes an analog cable for transmitting and receiving a signal in an analog signal state,
There are three types: a coaxial cable for transmitting and receiving a signal as digital data, and an optical cable for transmitting and receiving a signal as a digital signal optically. A dedicated plug is provided at the end of each cable to connect it to each electronic device .
Have been . The plug, TOS link in the case of the optical cable, in the case of coaxial cable pin plug, there is a pin plug in the case of analog cable.

Therefore, in order to be able to transmit and receive a signal using any of these cables, a plug insertion hole for connecting a plug of each cable is required.
(Jack) must be provided for each electronic device.

[0004]

In the conventional apparatus, since the insertion holes for connecting the plugs of a plurality of cables are independently provided as described above, a space for the insertion holes is required, and the apparatus is increased in size. There was a problem to do.

[0005] In addition, since power is always supplied to a circuit for transmitting and receiving digital data to and from a cable that is not connected, power is wastefully consumed, and in particular, an electronic device that operates on a battery. In the device, there is a problem that the battery is quickly consumed. Further, there is a problem that unnecessary radio waves are radiated to the outside.

The present invention has been made in view of such circumstances, and can reduce the size of the apparatus.
This is to suppress wasteful power consumption and unnecessary radiation.

[0007]

According to a first aspect of the present invention, there is provided a jack comprising a first plug, a second plug, and a third plug which are selectively inserted among the first to third plugs.
Inserted to determine if it is a plug
Detects the position of conductive or non-conductive parts of the plug
It is characterized by comprising detecting means. Claim 2
The electronic device determines which of the first to third plugs is
In order to make a determination, the conductive part or
Is a detecting means for detecting the position of the non-conductive portion;
Discriminating the inserted plug based on the detection result
Means.

Then, according to the result of the discrimination by the discriminating means ,
Turn off the transmission destination of the signal transmitted through the inserted plug.
Can be replaced. Further, it is possible to switch the power supply of the transmission destination of the signal transmitted through the inserted plug according to the determination result by the determination unit.
Wear.

[0009]

In the jack according to the first aspect, the jack is inserted.
Of conductive or non-conductive part of plug
Is done. In the electronic apparatus according to claim 2, the insertion of
Of conductive or non-conductive part of plug
And the inserted plug is determined.

[0010]

FIG. 1 shows the external structure of a portable magneto-optical disk drive to which an electronic apparatus according to the present invention is applied. As shown in FIG. 1, an insertion hole 3 for inserting a cartridge 2 containing a magneto-optical disk therein is formed on a side surface of the main body 1. An eject button 4 operated to eject the cartridge 2 is disposed on the right side of the insertion hole 3.

A display unit 5 such as an LCD is provided on the upper surface of the main body 1 so that a predetermined message is displayed as needed. Various operation buttons 6 to be operated in connection with the recording / reproducing operation are arranged on the upper surface of the main body 1.

Further, plug insertion holes 7 and 8 for connecting cables for transmitting and receiving signals to and from other electronic devices are provided on the left side surface of the main body 1. The plug insertion hole 7 is an insertion hole into which a plug of a cable for transmitting a signal to another electronic device is inserted.
Is an insertion hole into which a plug of a cable for supplying data from another electronic device to the main body 1 is inserted.

FIG. 2 shows a configuration of a plug of a cable connected to the plug insertion holes 7 and 8. This electronic device
In addition , three types of plugs are prepared as plugs 21 of the cables connected to the plug insertion holes 7 and 8. The plug 21a is a plug connected to a cable for transmitting and receiving analog audio signals.
Is a plug connected to a cable for transmitting and receiving digital audio data. The plug 21c is
A plug connected to an optical fiber for optically transmitting digital audio data.

The plugs 21a to 21c are formed so that their external shapes substantially correspond to each other. That is,
Both are formed so that they can be correctly inserted and connected to the plug insertion holes 7 and 8 in FIG.

The plug 21 is basically composed of two parts. The first part is a part 31 configured to have a taper with a relatively small diameter, and the second part is a part 32 having a larger diameter and a constant diameter than the part 31. This portion 32 is further basically divided into three regions 32a to 32c.

The portion 31 is a conductive portion 2 made of, for example, metal or the like in any of the plugs 21a to 21c.
_1a1 , _21b1 , and _21c1 . In contrast, regions 32a, in the plug 21a and 21b, although there is a conductive portion 21 _a2, 21 _b2, respectively, plugs 21c
The non-conductive portion 21 made of, for example, a synthetic resin
_c2 .

The region 32b is connected to the conductive portion 2 at the plugs 21a and 21b, as in the case of the region 32a.
It is formed as a 1 _a3, 21 _b3, in the plug 21c, and is formed as a non-conductive portion 21 _c3.

Furthermore, area 32c, in the plug 21a, formed as a conductive portion 21 _a4, plugs 21b,
In 21c, are respectively formed as a non-conductive portion 21 _b4, 21 _c4.

Inside the plug insertion holes 7 and 8, an electrode 41 is arranged at a position where the portion 31 is inserted, and
The electrode 42 is arranged at a position where the second region 32a is arranged. The electrodes 43 and 44 are arranged at the position where the region 32b is arranged, and the electrode 45 is arranged at the position where the region 32c is arranged.

The electrode 41 is connected to the first pin, the electrode 42 is connected to the second pin, and the electrode 43 is connected to the fourth pin. A predetermined voltage Vc is applied to the electrode 43 via the resistor 61. The electrode 44 is grounded and connected to the third pin. The electrode 44 is movable, and when the plug 21 is inserted into the plug insertion holes 7 and 8, the electrode 44 is pressed by the region 32 b and the electrode 46 is pressed.
When the plug 21 is pulled out of the plug insertion holes 7 and 8, the contact with the electrode 46 is released. The electrode 46 is connected to the fifth pin, and receives the voltage Vc via the resistor 62. Further, the electrode 45 is connected to the sixth pin, and a voltage Vc is applied via the resistor 63.

As a result, the plug insertion holes 7 or 8
When the plug 21 is inserted or pulled out, the output of the fourth to sixth pins changes as shown in FIG.

That is, with respect to the plug insertion holes 7 or 8,
When the plug 21a is inserted, the electrode 43 is
Since 1 _a3 is grounded via the electrode 44, a logic L is detected at the fourth pin. In addition, since the electrode 44 is in contact with the electrode 46, the logic L is also detected at the fifth pin connected to the electrode 46. Furthermore, the electrode 45 is connected to the conductive portion 21 _a4, the conductive portion 21 _a4 because it is integrated with the conductive portion 21 _a3, it is grounded via the electrode 44. As a result, the logic low is also applied to the sixth pin connected to the electrode 45.
Is detected.

On the other hand, when the plug 21b is inserted into the plug insertion hole 7 or 8, the logic (logic L) detected at the fourth and fifth pins is the same as that when the plug 21a is inserted. However, the plug 21b
In the above, since the region 32c is constituted by the non-conductive portion _21b4 , the electrode 45 is in a floating state,
The voltage Vc is applied to the sixth pin via the resistor 63. As a result, a logic H is detected at the sixth pin.

Next, in the case of inserting the plug 21c in the plug insertion hole 7 or 8, the regions 32b, because they are composed of non-conductive portion 21 _c3, the electrode 43 becomes a floating state, the fourth pin Is applied with a voltage Vc via a resistor 61. As a result, a logic H is detected at the fourth pin. Further, the electrode 44 is connected to the non-conductive portion 21 _c3
, And comes into contact with the electrode 46, so that a logic L is detected at the fifth pin. The electrode 45 is connected to the non-conductive portion 21.
_Since it comes into contact with _c4 , it becomes a floating state, and the voltage Vc is applied to the sixth pin via the resistor 63. As a result, the sixth pin is detected as logic H.

On the other hand, when the plug 21 is not inserted into the plug insertion hole 7 or 8, the electrode 43 is in a floating state, and the fourth pin detects logic H. Also, since the electrode 44 is not pressed by the region 32b of the plug 21, it is separated from the electrode 46 and the resistor 62 is connected to the fifth pin.
The voltage Vc is applied via the. As a result, logic H is detected also at the fifth pin. Further, since the electrode 45 is in a floating state, the voltage Vc is applied to the sixth pin via the resistor 63, and the logic H is detected.

As described above, when the logic of the fifth pin is H, it is understood that the plug is not inserted into the plug insertion hole 7 or 8. In other words, the logic of the fifth pin is L
When it is determined that the plug is inserted.

When the plug is inserted, the logic of the fourth and sixth pins is (L, L),
By determining which of (L, H) and (H, H), the plugs 21a, 21
It becomes possible to determine which of b and 21c it is.

In the plug 21a, the conductive portion _21a1 is an L-channel signal supply terminal, the conductive portion _21a2 is an R-channel signal supply terminal, and the conductive portions _21a3 and _21a4 are
Ground (ground potential). And the plug 21
In b, the conductive part 21 _b1 is on the hot side, and the conductive part 21 _b2
Are on the cold side, and the conductive portion _21b3 is on the ground. In the above embodiment, utilizing the position of the conductive portion used for the ground (including the case where it is not formed),
The type of plug (the type of signal to be transmitted) is determined.

Although it is logically possible to determine the type of plug using the region 32a of the portion 31 or 32, these portions or regions are used as signal supply terminals. Because it is the part that
A bias voltage used for detection is applied to the signal supply terminal, which may cause noise. Therefore, it is preferable to determine the type of plug using the position of the grounded conductive part as in the embodiment.

However, when each area is irradiated with light and its reflected light or transmitted light is received to detect a conductive portion or a non-conductive portion, detection is performed using a portion that is not grounded. It is also possible to do.

FIG. 4 shows the internal electrical configuration of the magneto-optical disk device shown in FIG. The signal supplied from the plug insertion hole 8 is supplied to a line-in amplifier 84 via switches 81 and 82, and further supplied to an A / D converter 85. The output of the A / D converter 85 is supplied to the data compression / decompression circuit 70 via the contact a of the switch 86.

The signal input via the switch 81 is supplied to the digital input amplifier 87 via the contact b of the switch 82, and its output is supplied via the contact b of the switch 88 to a digital audio interface (DAI).
89. And DAI
An output 89 is supplied to a data compression / expansion circuit 70 via a contact b of a switch 86.

Further, at the back of the plug insertion hole 8, a P
An IN photodiode 83 is provided. The photodiode 83 has a plug 21 c inserted into the plug insertion hole 8.
Is inserted, the light transmitted through the optical fiber is incident. The output of the photodiode 83 is input to the DAI 89 via the contact a of the switch 88, and the output of the DAI 89 is supplied to the data compression / decompression circuit 70 via the contact b of the switch 86.

On the other hand, a signal output from the data compression / expansion circuit 70 is supplied to a contact a of a switch 72 via a contact a of a switch 72, a D / A converter 79, and a line-out amplifier 80. . The output of the switch 76 is output from a plug inserted into the plug insertion hole 7 via the switch 77 to an electronic device (not shown).

When the switch 71 is switched to the contact b side, the output of the data compression / expansion circuit 70 is supplied to the DAI 72, and the output is supplied to the digital output amplifier 74 via the contact b of the switch 73. It has been made to be. The output of the digital output amplifier 74 is supplied to the transformer 75, the contact b of the switch 76, the switch 7
Via the plug 7, the plug connected to the plug insertion hole 7 outputs the data to a device (not shown).

When the switch 73 is switched to the contact a, the output of the DAI 72 is
8, and the light generated by the LED 78 is supplied to a device (not shown) via the plug 21c inserted into the plug insertion hole 7. This LED 78
Like the photodiode 83, it is arranged at a position facing the end of the tip of the plug 21c.

The magneto-optical disk 94 housed in the cartridge 2 is driven by a spindle motor 95. The magnetic head 92 is arranged so as to apply a predetermined magnetic field to the magneto-optical disk 94. The signal output from the data compression / expansion circuit 70 is supplied to the magnetic head 92 via a recording / reproduction circuit 91. Also, the optical head 93
Irradiates a laser beam onto the magneto-optical disk 94, receives the reflected light, generates an RF signal and an MO signal, and outputs the RF signal and the MO signal to the recording / reproducing circuit 91. Recording / reproducing circuit 9
1 outputs a signal reproduced from the magneto-optical disk 94 to the data compression / expansion circuit 70.

The CPU 96 controls each section to control the recording / reproducing operation. The fourth to sixth pins shown in FIG. 2 are connected to the CPU 96. Then, in response to the detection result from each of these pins, the CPU 96 switches the switches 71, 73, 76, 82, 8
6, 88 are respectively switched. Further, the CPU 96 responds to the detection result by
7 to control the supply of the power supplied from the battery 98 to each section.

The switches 77 and 81 in FIG.
The electrodes 41, 42 and 44 in FIG.
The switching is automatically performed by inserting the plug 21 into the plug insertion hole 7 or 8.

Next, the operation of the embodiment shown in FIG. 4 will be described. When plugs 21a for transmitting analog signals are inserted into plug insertion holes 7 and 8, conductive portion _21a1 is connected to electrode 41, conductive portion _21a2 is connected to electrode 42, and conductive portion _21a2 is connected to electrode 42.
_a3 and _21a4 are connected to the electrode 44. At this time, the switch 77 is connected to the switch 76, and the switch 81 is connected to the switch 82. Further, the CPU 96 detects that the plug 21a has been inserted from the output of the fourth to sixth pins as described above. At this time, the CPU 96 sets the switches 76 and 82
Are respectively switched to the contact a side. Also, switch 7
1 and 86 are respectively switched to the contact a side.

When a command to start recording is made by operating a predetermined one of the operation buttons 6 shown in FIG.
An analog audio signal input via the plug 21a inserted into the plug insertion hole 8 is input to the line-in amplifier 84 via the contact a of the switch 82, and after being amplified, the A / D converter 85 / D converted and supplied to the data compression / decompression circuit 70 via the contact a of the switch 86. The data compression / decompression circuit 70 compresses the input audio data and outputs the compressed audio data to the recording / reproduction circuit 91.

The recording / reproducing circuit 91 controls the magnetic head 92 in accordance with the input data and applies a magnetic field corresponding to the recording data to the magneto-optical disk 94. At this time, the CPU 96 controls the optical head 93 to irradiate the magneto-optical disk 94 with laser light of a predetermined intensity. Thus, data is magneto-optically recorded on the magneto-optical disk 94 rotated at a predetermined speed by the spindle motor 95.

On the other hand, when a reproducing operation is instructed, the optical head 93 reproduces a signal recorded on the magneto-optical disk 94 and outputs the reproduced signal to the recording / reproducing circuit 91. The recording / reproducing circuit 91 demodulates this signal and outputs it to the data compression / decompression circuit 70. The data compression / decompression circuit 70 decompresses the data supplied from the recording / reproduction circuit 91 and outputs the data to the D / A converter 79 via the contact a of the switch 71. The D / A converter 79 converts the input digital audio data into an analog audio signal.
After being amplified by the line-out amplifier 80, the audio signal is transmitted to the analog signal plug 21a inserted into the plug insertion hole 7 via the contact a of the switch 76 and the switch 77. This signal is further transmitted to an electronic device (not shown) via the cable to which the plug 21a is connected.

When the plug 21b of the coaxial cable for transmitting and receiving digital data is connected to the plug insertion holes 7 and 8, the CPU 96 detects this and connects the switches 76 and 8 to each other.
2 are each switched to the contact b side. Further, the switches 73 and 88 and the switches 71 and 86 are respectively switched to the contact b side.

As a result, the digital audio data input from the plug insertion hole 8 is supplied to the digital input amplifier 87 via the contact b between the switch 81 and the switch 82 and is amplified. The output of the digital input amplifier 87 is supplied to the DAI 89 via the contact b of the switch 88. The DAI 89 converts the input data from a DAI format to a normal format. The format-converted digital audio data is supplied to the data compression / decompression circuit 70 via the contact b of the switch 86. Thereafter, this data is recorded on the magneto-optical disk 94 in the same manner as described above.

Further, in the reproduction mode, the digital audio data output from the data compression / expansion circuit 70 is supplied to the DAI 72 via the contact b of the switch 71. The DAI 72 converts the input digital audio data into a DAI format. The format-converted digital audio data is supplied to the switch 73.
Is supplied to the digital output amplifier 74 through the contact b of
Amplified. Then, after the balance output is obtained by the transformer 75, the plug 21b inserted into the plug insertion hole 7 via the contact b of the switch 76, the switch 77, and a cable (not shown) to a device (not shown). Is output.

When the plug 21c connected to the optical fiber is inserted into the plug insertion holes 7 and 8, the switch 71 is switched to the contact b side and the switch 73 is switched to the contact a side. Similarly, the switch 86 is switched to the contact b side, and the switch 88 is switched to the contact a side. Light transmitted by an optical fiber connected to the plug 21c inserted into the plug insertion hole 8 is incident on the PIN photodiode 83. The photodiode 83 outputs an electric signal corresponding to the incident light. This signal is input to the DAI 89 via the contact a of the switch 88, and after being format-converted, supplied to the data compression / decompression circuit 70 via the contact b of the switch 86. Then, similarly to the case described above, the transmitted data is stored in the magneto-optical disk 94.
Will be recorded.

On the other hand, the data reproduced from the magneto-optical disk 94 is output from the data compression / expansion circuit 70 and supplied to the DAI 72 via the contact b of the switch 71. The signal that has been format-converted by the DAI 72 is supplied to the LED 78 via the contact a of the switch 73, and is converted from an electric signal to an optical signal. This optical signal is
The light is transmitted to an unillustrated device by an optical fiber connected to the plug 21c inserted into the plug insertion hole 7.

The CPU 96 includes plugs 21a, 21a.
It detects which of b and 21c is inserted, controls the power supply circuit 97 in accordance with the detection result, and supplies power only to necessary circuits. For example, when the plug 21a is inserted, power is supplied only to the line-in amplifier 84, A / D converter 85, data compression / expansion circuit 70, D / A converter 79, and line-out amplifier 80. Then, no power is supplied to the DAIs 72 and 89, the digital output amplifier 74 and the digital input amplifier 87.

When the plug 21b is inserted, power is supplied to the data compression / expansion circuit 70, DAI 72, digital output amplifier 74, digital input amplifier 87, and DAI 89, and the D / A converter 79, line out amplifier 80, No power is supplied to the line-in amplifier 84 and the A / D converter 85.

When the plug 21c is inserted, the data compression / expansion circuit 70, DAI 72, LE
Power is supplied to the D78, the photodiode 83, and the DAI89, and the D / A converter 79, the line-out amplifier 80,
No power is supplied to the line-in amplifier 84 and the A / D converter 85.

[0052]

As described above, according to the jack of the first aspect, the conductive portion or the non-conductive portion of the inserted plug is provided.
Since the position of the unit is detected, it is necessary to determine the inserted plug in electronic equipment equipped with a jack.
Can be.

According to the electronic device of the present invention, the plug has a conductive portion or a non-conductive portion.
Since the position is detected and the inserted plug is determined , the plug insertion hole can be used also as an insertion hole for inserting a plurality of plugs, and the device can be downsized.

[0054] According to the electronic apparatus according to claim 3, Pla
The signal transmission destination is automatically switched in accordance with the result of discrimination , so that there is no need to provide a switch for manually switching the signal transmission destination .
Operability can be improved.

[0055] According to the electronic apparatus according to claim 4, Plastic
Since the power supply state is controlled in accordance with the determination result of the power consumption, it is possible to suppress unnecessary power consumption and generation of unnecessary radiation. In addition, the battery can be used for a longer time.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an external configuration of an embodiment of a magneto-optical disk device to which an electronic apparatus of the present invention is applied.

FIG. 2 is a diagram illustrating a configuration of a plug inserted into plug insertion holes 7 and 8 in FIG.

FIG. 3 is a table illustrating logic for detecting a plug in FIG. 2;

FIG. 4 is a block diagram showing an internal electrical configuration of the embodiment of FIG. 1;

[Explanation of symbols]

1 body 2 cartridge 3 insertion hole 4 eject button 5 LED 6 operating buttons 7 and 8 plug insertion holes 21, 21a, 21b, 21c plug 31 portion 32a, 32b, 32c regions _{21 a1, 21 a2, 21 a3} , 21 a4 Conductive part 21 _b1 , 21 _b2 , 21 _b3 Conductive part 21 _b4 Non-conductive part 21 _c1 Conductive part 21 _c2 , 21 _c3 , 21 _c4 Non-conductive part 41 to 45 Electrode

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G11B 33/06 H01R 29/00 H01R 17/00

Claims (4)

(57) [Claims] A conductive portion for detecting a type of the plug;
An analog signal having a non-conductive portion at each predetermined position is transmitted.
A first plug for feeding the first plug;
A position different from that of the first plug, forming one shape
A conductive part and a non-conductive part for detecting the plug type
A second plug for transmitting a digital signal having
Have substantially the same shape as the first plug and the second plug
Together with the first plug and the second plug
Conductive parts and non-conductive parts for detecting plug type in different positions
And a third plug for transmitting an optical digital signal having a conductive portion.
And a plug into which the first plug and the second plug can be selectively inserted .
Plug or the third plug.
In order to distinguish between the plug and the conductive part of the inserted plug,
Or a detecting means for detecting a position of the non-conductive portion . 2. A conductive part for detecting a type of a plug.
An analog signal having a non-conductive portion at each predetermined position is transmitted.
A first plug for feeding the first plug;
A position different from that of the first plug, forming one shape
A conductive part and a non-conductive part for detecting the plug type
A second plug for transmitting a digital signal having
Have substantially the same shape as the first plug and the second plug
Together with the first plug and the second plug
Conductive parts and non-conductive parts for detecting plug type in different positions
And a third plug for transmitting an optical digital signal having a conductive portion.
Electronic devices with jacks that can selectively insert
In this case, the inserted plug is the first plug and the second plug.
Plug or the third plug.
In order to distinguish between the plug and the conductive part of the inserted plug,
Or a detecting means for detecting the position of the non-conductive portion, and a plug inserted based on a detection result by the detecting means.
An electronic apparatus, comprising: a determination unit configured to determine whether the electronic device is in a live state. 3. A method according to a result of the discrimination by said discriminating means.
The destination of the signal transmitted through the inserted plug
The electronic device according to claim 2, wherein the electronic device is switched . 4. A method according to a result of determination by said determination means.
The destination of the signal transmitted through the inserted plug
3. The electronic apparatus according to claim 2 , wherein the power supply is switched .