JPH0563871B2 - - Google Patents

Description

[Detailed description of the invention]

<Industrial Application Field> The present invention relates to a connection configuration in a time-acting acoustic device. <Prior art and its problems> A so-called car stereo that is installed at any location such as a dart board in an instructor's room is well known.
Traditionally, cassette decks have been widely used as audio equipment for automobiles, but in recent years, with the spread of digital audio equipment such as compact disc (CD) players and digital audio tape (DAT) players, these CDs and DATs have become more popular. There is an increasing demand for software to be usable in cars. In order to meet these demands, we have developed a CD for automobiles.
Although various players and DAT players have been provided or proposed, there are usually one or two opening spaces provided in automobiles, especially dart boats, to accommodate such audio equipment, and the opening space of the opening space is It is practically impossible to permanently install more different types of audio equipment in a car. Multiple information playback devices such as a cassette deck section and a CD player section are incorporated into a single device, and this can be configured so that it can be attached to the opening space of the dart board from both directions, so that it can be used as both information playback devices. An audio device for automobiles configured to achieve this effect has been proposed (Japanese Utility Model Publication No. 48084/1984). In this case, if an attempt is made to incorporate a plurality of information playback devices into a single device, the device will inevitably become larger. Furthermore, if such a device is installed in the limited space of a car's dash board, about half of it will protrude into the passenger compartment.
It may interfere with driving, etc. <Means for Solving the Problems> The present invention was devised in consideration of the above-mentioned circumstances in the prior art, and it provides a connection configuration for a plurality of automotive audio equipment that is compatible with various software. The main purpose is to provide In particular, the present invention, cassette deck, CD player, DAT
When audio equipment such as a player is used for automobiles, the output terminals for the front and aperture speakers, and the connection terminals for the accessory input terminals for interlocking with the automobile accessory switch are commonly provided for all audio equipment. The aim is to achieve the above objectives by focusing on the fact that That is, the present invention is configured such that a plurality of audio devices each having a built-in power amplifier can be used in common, in which a group of connection terminals having substantially the same external dimensions and a common arrangement are arranged at a common position. a single sleeve that is attached to any opening in an automobile interior and has an inner dimension that corresponds to a common outer dimension of the audio equipment; and when the audio equipment is housed within the sleeve, the audio equipment is arranged on the back side of the sleeve so as to fit in correspondence with the connection terminal group in the audio equipment, and at least connects the connection terminal group in the audio equipment, the battery, the speaker, and the power amplifier for the speaker when housed. an external connection means connected to the connector means to achieve connection with external equipment including; a first control means for operating the speaker power amplifier in conjunction with ON/OFF of the audio equipment; This is a connection configuration for an automobile audio device, characterized in that it includes the following. The audio device may have a built-in tuner. Further, in the case where the external equipment includes a CD changer, it is preferable that a second control means for remotely controlling the CD changer through operations on the audio equipment is further provided. <Function> According to the present invention, various information reproducing devices, such as cassette decks, CD players, and DAT players, all have substantially the same outer dimensions and a common group of connection terminals are arranged at common positions, A sleeve equipped with connectors corresponding to the group of connection terminals is installed in an opening space in, for example, a dash board of a car, so the user selects an information reproducing device according to the software desired by the user and inserts it into the space. You can download the software just by doing this. <Embodiment> The first embodiment shown in FIG. 1 is replaceable and can be attached to a single sleeve fixedly or removably attached to a predetermined location in a vehicle, particularly an opening space formed in a dash board. As a solid head unit with a built-in plurality of tuners, a cassette deck 10, a CD player 12
It includes a DAT player 14. These head units are all constructed to have the same external dimensions so that they can be attached to a single sleeper. In addition, each of these head units has an operation panel on its front, and a series of connection terminals with a common structure are provided at a common position on the back. be. FIG. 8 shows the head unit (the cassette deck 10 is shown as an example) in a state immediately before being attached to the sleeve, and the connections between the connection terminals of the cassette deck 10 and external equipment are as follows in this embodiment. Socket 10 forming the connection terminal group
3 and the plug 1 attached to the back of the sleeve 101
24-pin connector 18 consisting of 02 (Fig. 1)
It is done through. For example, this 24-pin connector is part number C manufactured by SMK Corporation.
SS3124 (socket) and CSC3124 (plug) can be used. Thus, Kasetsuto Detsuki 10
When the plug 10 is completely inserted into the sleeve 101, the plug 10 attached to the back side of the sleeve 101
Each pin of the two is fitted into each hole of a socket 103 provided on the back side of the cassette deck 10, thereby establishing an electrical connection between the two. As shown in FIG. 1, input/output signals in each head unit of the first embodiment include an output for the front speaker 20 (SP OUT (F)) and an output for the rear speaker 2.
Output for 2 (SP OUT(R)), AUX input (AUX
IN), accessory input (ACC) to be supplied with power from the battery via the accessory switch in order to operate with the accessory switch of the automobile, battery power input (BATT) to be supplied with power directly from the battery, and the above two systems. Ground (GND) corresponding to the power input terminal, light control input (LIGHT CONT) whose voltage changes in conjunction with the illuminance adjustment of various instruments in the car to control the illuminance adjustment of the head unit, and connection to the antenna installed in the car. includes the antenna input (ANT) and system control signals (SYS/CON). The system control signal (SYS/CON) is sent and received in order to remotely start the CD changer 16, which is installed in the rear trunk of a car, for example, separately from the head unit in the dash board, via the operation section on the front panel of the head unit. In particular, when the cassette deck 10 or the DAT printer 14 is selected and installed as the head unit, the program that presets the CD in the CD changer 16 can be transmitted via the operation section on the front panel of the cassette deck 10 or the DAT printer 14. It is used to select and play songs according to the In addition, accessory power supply (ACC)
The switch is linked with the accessory switch to turn the head unit's power on and off. Also, the battery power supply (BATT) is turned off when the accessory power is turned off.
The various memories inside the head unit are maintained even in the
It is designed to be used for constant head unit operation regardless of the power consumption of other electrical equipment in the vehicle. The square head unit also sends a control signal (POWER ANT) to operate the power antenna installed outside the vehicle in conjunction with the ON/OFF of the tuner built into the head unit.
ON/OFF) is output. Further, each head outputs a control signal (POWER ON/OFF) for turning on/off the power of the DC changer 16 through the ON/OFF of the power switch of the head unit. The head unit 4 in this embodiment includes a four-channel power amplifier and a tuner. Of course, the tuner may be constructed separately from the main body of the cassette deck, CD player, or DAT. 24-pin connector 18 in this first embodiment
An example of the arrangement of each terminal in the socket 103 and plug 101 is shown in Table 1 below. Note that a system control signal (SYS/
A digital data bus ( ^D2B ) capable of bidirectional data transfer is used as the transmission path for transmitting CON. This is a spare terminal for power pin 9 and 13th control signal extension.

[Table] Below, structures and members that are the same as those in the second to fourth embodiments of the present invention are illustrated with the same reference numerals, and therefore, they are basically the same as in the first embodiment. Therefore, detailed explanation will be omitted. Furthermore, the structures and members shown in the first embodiment are shown with corresponding reference numerals, and therefore the second to fourth embodiments mainly differ from those in the first embodiment. I will explain about it. In the second embodiment shown in FIG. 2, a cassette deck 10a, a CD player 12a, and a DAT player 14 each having a built-in two-channel power amplifier and tuner for a front speaker 20 are replaceably incorporated into an automobile dashboard. It is envisaged that it can be attached to a sleeve built into the sleeve. That is, these and the head units do not have built-in two-channel power amplifiers for the rear speakers 22, but the two-channel power amplifiers 24 for the rear speakers are installed separately in the trunk or the like at the rear of the automobile. As a result, the head unit can be made smaller, lighter, and less expensive than the first embodiment. power amplifier 2
4 is activated in response to line-out output (LINE OUT) from each head unit, and is configured to send speaker output (SP OUT) to rear speaker 22. For this reason, each head unit in this embodiment sends out an output (SP OUT) for the front speaker 20, and
Line out output (LINE OUT) is given to the power amplifier 24 for the rear speaker 22, and is also used to turn on/off the power switch of each head unit.
A control signal (POWOR) for interlocking the power supply of the power amplifier 24 with the CD changer 16
ON/OFF) is sent. 24-pin connector 18 in this second embodiment
An example of the terminal arrangement of a is shown in Table 2 below.

【table】

[Table] In the third embodiment having the configuration shown in FIG. 3, the head units each having a built-in tuner, that is, the cassette deck 10b, the CD player 12b, and the DAT player 14b, are replaceable or removable in a single sleeve. can be attached to. Each of these head units does not have built-in power amplifiers for the front speaker 20 and the rear speaker 22, making it possible to further reduce size and weight and cost compared to the second embodiment. Line out output (LINE OUT (F), LINE
OUT(R)) via the 24-pin connector 18b,
The speaker output (SP OUT (F), SP OUT
(R) is sent to the front speaker 20 and ear speaker 22, respectively. From the head unit,
Along with the CD changer 16, this power amplifier 2
The control signal (POWER ON/OFF) to link the operation of 6 with the ON/OFF of the head unit is
It is sent via connector 18b. Connector 18 in the third embodiment shown in FIG.
An example of the pin arrangement of B is shown in Table 3 below.

[Table] The configuration of the fourth embodiment is as shown in FIG.
A plurality of head units, ie, a cassette deck 10c, having the same external dimensions and a common group of connection terminals,
The head unit of either the CD player 12cn or the DAT player 14c is optionally configured to be mounted in a sleeve fitted into the opening space of the dash board. Since each head unit prepared in this fourth embodiment does not have a built-in speaker power amplifier or tuner, it is possible to significantly reduce size and weight as well as cost. FIG. 5 shows a schematic configuration of each head unit in the fourth embodiment. Note that the device configuration is slightly different depending on whether an analog device (cassette deck 10c) is used as the head unit or a digital device (CD player 12c or DAT player 14c). The figure basically shows the case of analog equipment, and changes for digital equipment are shown in parentheses or with dotted lines.
After the signal from the head unit mechanism section 30 (in the case of a CD player, it includes an optical pickup, an optical pickup drive motor, a disk moder, etc.) is amplified and shaped by a preamplifier (or RF amplifier) 32, it is sent to a buffer amplifier (or digital signal processing circuit). ) 34 and is output as an analog signal (or digital signal). When analog equipment is used, the buffer amplifier 34 is connected to protect the preamplifier 32 from impedance fluctuations and to eliminate mutual interference (when digital equipment is used, various functions including demodulation processing using PLL are connected). digital signal processing is performed).
The mechanism section 30 is also connected to a servo circuit 36, and a first microcomputer 38 controls each operation in the mechanism section 30 through an operation switch 31. In addition, a second microcomputer 40
The operation switch 31 controls a display 42 that displays the operating status of the head unit, and also sends out a system control signal (SYS/CON). In this embodiment, the system control signal (SYS/CON) is sent and received to remotely control the CD changer 16, and is also sent to and received from each device that is separated from each head unit and installed separately in the automobile, namely the D/A converter. It also transmits and receives control signals for remotely controlling the unit 50 and tuner unit 60, respectively, as will be described later. Furthermore, the second microcomputer 40 sends out a power control signal (POWER ON/OFF) to turn on/off the power to the CD changer 16/A converter unit 50 and tuner unit 60.
Control OFF. An example of the configuration of the D/A converter unit 50 is shown in FIG. as a head unit
24-pin connector 1 when using digital audio equipment such as CD player 12c or DAT14c.
Digital signal (D/
OUT(1)) or the digital signal (D/OUT(2)) transmitted from the CD changer 16 is first sent to the PLL 52 via the input switch 90, which is switched and controlled by the system control signal (SYS/CON). After the distortion on the time axis of the digital signal is corrected and unnecessary frequency components are removed by the digital filter 54, the digital signal is converted into an analog signal by the D/A converter 56. The obtained PAM wave is LPF58
Only the audio signal is extracted and sent to the tuner unit 60 as an analog signal (A/OUT). In addition, the periodic signals required when converting to analog signals are system control signals (SYS/CON).
is sent to and received from the head unit by the An example of the configuration of the tuner unit 60 is shown in FIG. In this embodiment, a digital synthesizer tuner is used, and the system control signal (SYS/CON) in the tuner is
Upon receiving the signal that controls AM/FM selection and tuning, the PLL synthesizer 62 increases or decreases the frequency to match the desired AM or FM channel.
A control signal for the antenna (ANT) is transmitted to the AM tuner section 64 or FM tuner section 66, and
The radio signal from the
It is sent to an input selector switch 70 controlled by a system control signal (SYS/CON). The input selector switch 70 further includes an AUX input signal (AUX
IN) and the first and second analog input signals (A/
IN(1), A/IN(2)) are sent. The first analog input signal (A/IN(1)) is an analog output from the cassette deck 10c, which is an analog device, and is sent via the connector 18c, and the second analog signal (A/IN(2)) is CD player 12c or DAT
When a digital device such as 14c is used as a head unit, the signal is converted into an analog signal by the D/A converter unit 50 and sent as an analog signal, as described above. Here, the system control signal (SYS/CON) includes a signal that identifies whether the head unit is an analog device or a digital device, and if the head unit is an analog device, the input selector switch 70
is the analog output (A/
If the head unit is a digital device, switch the input changeover switch 70 between the analog output (A/OUT(2)) from the D/A converter unit 50 and AUX. control each to switch between them. Furthermore, when the AUX input (AUX IN) is selected by the head unit, the system control signal (SYS/CON) controls the input changeover switch 70 to switch to the AUX input. A signal from the input selector switch 70 is sent to a volume control circuit 72, a balance control circuit 74, and is transmitted to a tone control circuit 78 via a buffer amplifier 76. Furthermore, after the output of the front speaker 20 and rear speaker 22 is adjusted by the fader control circuit 82 via the buffer amplifier 80, the line out output (LINE OUT(F), LINE
OUT(R)), and the power amplifier 28
sent to. Here the amplified output signal (SP
OUT(F), SP OUT(R)) are front speakers 20
and the rear speaker 22, respectively, where the output is converted. Here, the volume control circuit 72, the balance control circuit 74, the tone control circuit 78, and the fader control circuit 82 output a system control signal (SYS/CON).
Each is remotely controlled by the This tuner unit 60 has a DC/DC power supply for stabilizing the power supply voltage to each head unit.
A converter 84 is built-in. That is, the battery power (BATT) supplied through the connector 18c is stabilized and converted into a constant voltage power (DC), which is again supplied to the head unit through the connector 18C. When the head unit operates with a plus or minus power supply, the battery power supply (BATT) can be stabilized and converted to a minus voltage by this DC/DC converter 84. Naturally, it is necessary to supply power to the D/A converter unit 50 and tuner unit 60 themselves. An example of this is shown in conjunction with FIG. 6 for a D/A converter unit 50. The battery power (BATT) supplied through the connector 18c is converted by the DC/DO converter 86, and the resulting voltages of +5V, -5V and -15V are used within the unit 50. If a particularly large supply voltage is not required, the tuner unit 6
The power (DC) output from the DC/DC converter 84 built in the 0 may be used as is. Inside the tuner unit 60, a constant voltage power source (DC) is used as in each head unit. An example of the pin arrangement of the connector 18c used in the fourth embodiment is shown in Table 4 below.

[Table] In the second to fourth embodiments described above, the power amplifier was described as being installed in the trunk of a car, but the present invention is not limited to this. For example, as shown in Figure 9,
A power amplifier 110, which has been miniaturized by using a small power IC, is provided with a plug 104 corresponding to the socket 103 behind the head unit (in the illustrated example, the cassette deck 10) on the front side, and a plug 104 located at the back of the sleeve 101.
It is also possible to provide a socket 105 corresponding to the sleeve 101 and to form the power amplifier 110 so that its outer dimensions correspond to the inner dimensions of the sleeve 101, and to arrange the power amplifier 110 between the back surface of the sleeve 101 and the head unit. . In this case, power from the battery is supplied to the head unit via the power amplifier 101. In addition, in the first to fourth embodiments, the ON/OFF of the power supply of the power amplifier, etc. is controlled by a control signal (POWER) that is different from the system control signal (SYS/CON).
ON/OFF).
This control is also performed using the system control signal (SYS/CON).
It is also possible to configure it so that it is performed by. Furthermore, it is sufficient that each head unit is formed so that at least the outer dimensions of the portion mounted inside the sleeve correspond to the inner dimensions of the sleeve, and the shape of the front operation panel of each head unit can be changed as appropriate. Of course there is. <Effects of the Invention> According to the present invention as described above, the head units of various analog or digital audio equipment such as cassette decks, CD players, DAT players, etc. can be replaced, detached, and selected, and the opening space in the dash board of an automobile can be used. Since it can be installed in a single sleeve installed in the car, you can enjoy various software inside the car. Furthermore, according to the present invention, since the speaker power amplifier is separated from each head unit mounted on the dash board and installed as an external device, each head unit can be made smaller and lighter, and costs can be reduced, and the sound quality can be improved. It will be planned.

[Brief explanation of drawings]

1 to 4 are schematic configuration block diagrams showing an embodiment of the present invention, FIGS. 5 to 7 are block diagrams showing a schematic configuration of each unit in the configuration shown in FIG. 4, and FIGS. FIG. 9 is a perspective view of a main part showing different aspects of the mounting relationship between the head unit and the sleeve. Explanation of symbols 10, 10a, 10b, 10c: Cassette deck, 12, 12a, 12b, 12c: CD player, 14, 14a, 14b, 14c: DAT, 1
8, 18a, 18b, 18c: connector, 24,
26, 28: power amplifier, 50: D/C converter unit, 60: tuner unit, 10
1: Sleeve, 102: Plug, 103: Socket.

Claims (1)

[Scope of Claims] 1. A vehicle configured so that a plurality of audio devices having substantially the same external dimensions and having a group of connection terminals arranged in a common arrangement in a common position can be shared, A single sleeve that is attached to an arbitrary opening in a room and has an inner dimension corresponding to a common outer dimension of the audio equipment, and a connection terminal group of the audio equipment when the audio equipment is housed in the sleeve. connector means disposed on the back side of the sleeve so as to fit in a corresponding manner; and when the audio equipment is accommodated in the sleeve, the connecting terminals of the audio equipment and at least a battery and a power source for a speaker are connected to each other. external connection means connected to the connector means for achieving connection with external equipment including an amplifier; and a power amplifier for the speaker connected to the audio equipment.
and first control connection means connected to the connector means for activation in conjunction with ON/OFF. 2. A connection configuration for an automobile audio device according to claim 1, wherein the audio device has a built-in tuner. 3. The external equipment includes a CD changer, and further comprises second control connection means connected to the connector means for remotely controlling the operation of the CD changer via operations on the audio equipment. A connection configuration in an automotive audio device according to claim 1, characterized in that: