JP3232977B2 - Electronics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device such as an on-vehicle audio device.

[0002]

2. Description of the Related Art In an on-vehicle radio receiver, a frequency band, a reception frequency interval, and the like differ depending on a destination. For this reason, conventionally, a radio receiver was designed for each destination. On the other hand, instead of designing radio receivers individually for each destination, we designed a common radio receiver for multiple destinations,
There has been proposed a radio receiver in which a common radio receiver can be used for a plurality of destinations by changing the setting of a frequency band and a reception frequency interval according to a destination.

For example, a resistor connection portion is provided on a printed circuit board of a radio receiver, a resistor having a resistance value set in advance according to a destination is connected to the resistor connection portion, and a voltage drop due to the resistance is determined by a microcomputer or the like. 2. Description of the Related Art There is known a radio receiver that automatically determines a destination by performing the determination in (1) and automatically sets a frequency band, a reception frequency interval, and the like according to the destination. In addition, a key matrix circuit for determining a key operated among a plurality of keys provided in the radio receiver is used, and a diode is connected to a place set for each destination of the key matrix circuit. A radio receiver is known in which a connection point of the diode is determined by a microcomputer to automatically determine a destination, and a frequency band, a reception frequency interval, and the like according to the determined destination are automatically set.

[0004] Conventionally, by simultaneously operating two specific keys predetermined according to a destination among a plurality of keys provided in a radio receiver, the destination is determined and the destination is determined. 2. Description of the Related Art There is known a radio receiver that automatically performs a setting corresponding to.

[0005]

However, in the above conventional example, the radio receiver is connected to a resistor having a resistance value corresponding to the destination, or a diode is connected to a location corresponding to the destination of the key matrix circuit. Had to be changed according to the destination. In addition, when a destination is determined by a specific key operation, the key operation is complicated.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and does not need to change an electronic device itself such as a radio receiver according to a destination and does not need to perform a specific key operation. An electronic device capable of automatically setting a place is provided.

[0007]

The present invention comprises a first connector,
A first connector provided on the device body and fitted to the first connector.
And second connector, the first connector is connected to one end, to the free terminal of the second connector, different connection states
Different voltage can be applied by connecting the relay cord to the empty terminal of the second connector.
Which is applied to the free terminal of the upper Symbol second connector, determining means for determining a voltage value corresponding to the specification or function of the device, the specification or function of the instrument in accordance with the judgment result of the judging means described above And a setting means for automatically setting the setting in the device main body.

[0008]

Therefore, according to the present invention, the voltage value of the vacant terminal of the connector of the electronic device is determined by the determining means by using the relay cord determined according to the destination and the specification / function of the electronic device. Thus, the electronic device can be automatically set to a setting according to a destination and specifications / functions.

[0009]

1 and 2 show an embodiment of the present invention.
It will be explained together. In this embodiment, the radio receiver,
This is an example of an in-vehicle audio device in which a plurality of audio devices such as a cassette deck and a compact disc player are integrated.

In FIG. 1, reference numeral 1 denotes a main body of the apparatus, which houses audio equipment such as a radio receiver, a cassette player, and a compact disc player. Reference numeral 2 denotes a control circuit including a microcomputer or the like, and the control circuit 2 controls audio equipment such as a radio receiver, a cassette player, and a compact disc player. 2a is a voltage converter for lowering the input voltage. Reference numeral 3 denotes a male connector connected to the audio equipment. The male connector 3 has a plurality of male terminals 4a to 4f. 5a to 5f are a plurality of cords connected to the respective male terminals 4a to 4f . The code 5e is the voltage converter 2
a. Reference numeral 6 denotes a relay cord. The relay cord 6 includes a plurality of cords 7a to 7f, a female connector 8, and a male connector 9, and the female connector 8 includes the male terminals 4a to 4f of the male connector 3. A plurality of female terminals 10a to 10f that are in contact with each other are provided. Male connector 9 above
Are provided with a plurality of male terminals 11a to 11f. Cords 7a, 7b, 7c, 7d, 7f are connected to the male terminals 11a, 11b, 11c, 11d, 11f, respectively.

The cord 7e branches from the cord 7a and is connected to the female terminal 10e of the female connector 8. 12
Is a female connector fitted with the male connector 9 of the relay cord 6, and the female connector 12 has a plurality of female terminals 13a.
To 13f. Reference numeral 14 denotes a battery installed in an automobile. The positive electrode of the battery 14 is connected to one female terminal 13a of the female connector 12 via an accessory switch 15. Female terminal 13b
Is directly connected to the positive electrode of the battery 14.

FIG. 2 shows a front view of the male connector 3 of the device main body 1. In FIG. 2, reference numeral 16 denotes a connector main body, and one surface of the connector main body 16 has the male terminal 4a.
To 4f are arranged in two rows. Female terminals 10a to 1 of female connector 8 of relay cord 6 fitted to male connector 3
Similarly, 0f is arranged in two rows on the connector body. Similarly, the male connector 9 and the female connector 12 also have male terminals 11a to 11f and female terminals 13a to 13f arranged in two rows. The male terminal 11e of the male connector 9 and the female terminal 13e of the female connector 12 are both empty terminals.
They are fitted together but do not contribute to electrical connection.

In FIG. 2, the male terminal 4a is a power supply terminal, the reference numeral 4b is a backup power supply terminal for supplying power to the control circuit 2 of the apparatus main body 1 regardless of whether the accessory switch 15 is on or off, and the reference numerals 4c and 4d are acoustic. Output terminal, 4
e is a terminal for determining the destination / specification / function of the audio equipment,
4f is a ground terminal.

Next, the operation of the above embodiment will be described. In FIG. 1, a male connector 3 of a device main body 1 of an audio device and a female connector 8 of a relay cord 6 are fitted together with a male connector 9 and a female connector 12 of a relay cord 6 installed at a predetermined location in a vehicle cabin. Is fitted, the device main body 1 becomes operable. Accessory switch 1
When the switch 5 is turned on, the voltage of the battery 14 is changed to the accessory switch 15, the female terminal 13a of the female connector 12, the male terminal 11a of the male connector 9, the cords 7a and 7e, the female terminal 10e of the female connector 8, and the male of the male connector 3. Terminal 4
e, applied to the voltage converter 2a via the code 5e.
The voltage converter 2a reduces the applied power supply voltage, and the reduced voltage is applied to the control circuit 2. Control circuit 2
Is used to determine the destination and the specifications / functions of the audio equipment by determining the applied voltage value by a determination circuit configured in the control circuit 2, and the frequency band and the reception are determined by the automatic setting circuit configured in the control circuit 2. The frequency interval and the like are automatically set. When the cord 7e is not branched from the cord 7a but is branched from the cord 7f (branched as shown by a broken line in FIG. 1), the male terminal 4e of the male connector 3 has the ground potential, Is determined by the control circuit 2 so that setting for another destination is automatically performed.

As described above, in the above-described embodiment, the vacant terminal of the connector is used, and the cord connection state of the relay cord is changed so that the voltage corresponding to the destination is applied to the vacant terminal. The main body 1 does not need to be changed at all depending on the destination.

FIG. 3 shows another embodiment of the present invention. In the present embodiment, as shown in FIG. 3, the control circuit 2 can determine whether or not the vacant terminals 10f and 10g are connected by the code 7e by using two vacant terminals of the relay cord 6. , and the if it detects a ground potential as shown in FIG. 3, the destination a, the free terminal 10f, 10 g is connected to ground destination if no B, code 7e which is branched from the code 7a is in the free terminal 10 f is connected, can be a destination C in the case of the power supply voltage to the vacant terminals 10 f is applied, by determining the voltage applied to the male terminal 4 f of the male connector 3 in the control circuit 2, The destination can be determined, and the setting according to the destination can be automatically performed.

The automatic setting circuit included in the control circuit 2 includes a storage circuit in which a plurality of sets of data corresponding to destinations, specifications, and functions are stored. The data is read from and set.

In the above embodiment, the frequency band and the reception frequency interval are automatically set mainly according to the destination. However, the present invention is not limited to the frequency band and the reception frequency interval. The present invention can also be employed to set specifications and functions such as specifying whether or not the communication bus system is used and specifying a communication bus system to be used.

[0019]

According to the present invention, as is apparent from the above embodiment, the equipment body is completely the same, and only the relay cord having a different connection state according to the destination is used. This has an advantage that the setting according to the ground or the like can be automatically performed.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram of an electronic device according to an embodiment of the present invention.

FIG. 2 is a front view of a connector of a relay cord used in the embodiment.

FIG. 3 is an electric circuit diagram of an electronic device according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Device main body 2 Control circuit 3 Male connector 6 Relay cord 7a-7f Code 8 Female connector 9 Male connector 12 Female connector 14 Battery

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Nobuyuki Tohei No. 4-3-1 Tsunashima Higashi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Inside Matsushita Communication Industrial Co., Ltd. (56) References JP-A-2-146937 (JP, A) Hira 5-87870 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01R 31/06

Claims (3)

(57) [Claims] A first connector provided on an apparatus main body;
A second connector fitted to the first connector, the first connector is connected to one end, the second connector
To the vacant terminals of the
And a relay cord capable of applying a
Is connected to the free terminal of the second connector, it is applied to the free terminal of the upper Symbol second connector, determining means for determining a voltage value corresponding to the specification or function of the device, according to the determination result of the determination means electronic apparatus comprising a kite specification or function of the device; and a setting means for automatically setting the above apparatus body. 2. The relay code comprises a plurality of codes.
And determining whether or not the cord to which the voltage is applied is connected to a vacant terminal of the first connector based on a voltage value applied to a vacant terminal of the second connector. The electronic device according to claim 1, wherein the determination is performed by means. 3. The relay code comprises a plurality of codes.
And determining whether or not the cord to which the ground potential is applied is connected to a vacant terminal of the first connector by a voltage value applied to a vacant terminal of the second connector. The electronic device according to claim 1.