JPH01149599A - Connection constitution in acoustic equipment for car - Google Patents

Abstract

PURPOSE:To enjoy various softwares in a car room by fitting head units such as a cassette deck, a CD player and a DAT player, etc., exchangeably, attachably and detachably to the opening space of the dash board of a car. CONSTITUTION:A cassette deck 10, a CD player 12 and a DAT player 14 are prepared as plural tuner built-in type head units which can be fitted exchangeably for a single sleeve fixed in the opening space formed in the dash board, etc., of the car. All of these head units are constructed in the same exterior dimensions so as to be fitted to the single sleeve. Each of them has a control panel on its front face and a series of connecting terminals 18 having common structures are provided in common positions on its rear face. Front speakers 20 and rear speakers 22, etc., in common are connected through the connecting terminals 18.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a connection configuration for automotive audio equipment.

<Prior art and its problems> A so-called car stereo that is installed at any location such as a dash board inside a car is well known. Cassette decks have traditionally 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, DATs, etc. There is an increasing demand for software to be usable in cars.

In order to meet such demands, various CD players and DAT players for automobiles have been provided or proposed, but the opening space provided in automobiles, especially on dash boards, to accommodate such audio equipment is not normally available. In this case, there are one or two opening spaces, and it is practically impossible to permanently install more different audio equipment than the number of opening spaces in the automobile.

A plurality of information reproducing devices such as a cassette deck section and a CD player section are incorporated into a single device, and this is configured so that it can be installed in the opening space of the dash board from both directions.
An automobile audio device configured so that it can be used as both information playback devices has also been proposed (Utility Model Application No. 62-
48084). In this case, if a plurality of information reproducing devices are to be incorporated into a single device, the device will inevitably become larger. Furthermore, if such a device is installed in the limited opening space of the dash board of an automobile, approximately half of the device will protrude into the interior of the vehicle, potentially interfering with driving, etc.

Means for Solving the Problems> The present invention has been devised in consideration of the various circumstances in the prior art as described above, and it is a method of connecting a plurality of automotive audio equipment compatible with various software. The main purpose is to provide In particular, when audio equipment such as a cassette deck, CD player, DAT player, etc. is used for automobiles, the present invention provides output terminals for front and rear speakers, accessory input terminals for interlocking with automobile accessory switches, etc. The above object is achieved by focusing on the fact that connection terminals are commonly provided for all audio devices.

That is, in the present invention, a group of connection terminals having substantially common outer dimensions and a common arrangement are arranged at azeotropic positions, and each has a built-in two-channel power amplifier for front (or rear speakers). It is configured so that a plurality of nine audio devices can be shared, and is installed at any opening in the vehicle interior, and includes a single sleeve having an inner dimension corresponding to a common outer dimension of the audio devices, and an inner diameter of the sleeve. connector means disposed on the back side of the sleeve so as to fit in correspondence with the connection terminal group of the audio equipment when the acoustic device is housed; = When the audio equipment is housed in the housing, the connection terminal group of the audio equipment is connected to external equipment including at least a battery, front and rear speakers, and a power amplifier for the rear (or front) speakers. an external connection means connected to the connector means in order to achieve this, and a controller for operating the rear (or front) speaker power amplifier in conjunction with ON10 F F of the audio equipment; This is a connection configuration for an automobile audio device, characterized in that it includes the following.

The above-mentioned audio equipment may have a built-in tuner, or may be configured separately from the head unit as a device outside the tuner unit filter. In the latter case, it is preferable that a second control means for remotely controlling the operation of the tuner unit via the operation on the audio equipment is further provided.

Further, in the case where the external device includes a CD changer, a third control means for remotely controlling the CD changer through the operation in the audio device is further provided, or the second control means Preferably, the device is configured to also control the CD changer.

<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 a common position. A sleeve equipped with connectors corresponding to the group of connection terminals is installed in an opening space in the dash board of a car, for example, so that the user can select an information playback device according to the software desired by the user and insert it into the space. You can enjoy the software just by loading it into your computer.

<Embodiment> The first embodiment shown in FIG. 1 is replaceably attached to a single sleeve that is fixed or detachably attached to a predetermined location in a car, particularly an opening space formed in a dash board. A plurality of tuner-incorporated head units configured to perform the above-mentioned functions include a cassette deck 1O1CD player 12 and a DAT player 14. These head units are all configured to have the same outer dimensions so that they can be attached to a single sleeve. 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, and the signals flowing to each terminal are the same. be.

Figure 8 shows the head unit (as an example, the cassette deck l).
0) is shown in the state just before it is attached to the sleeve, and in this embodiment, the connection terminal group of the cassette deck 10 and the external device are connected to the socket that forms the connection terminal group. This is done via a 24-pin connector 18 (FIG. 1) consisting of a plug 103 and a plug 102 attached to the inner part of the sleeve lot. This 24-pin connector is, for example, part number C55 manufactured by SMK Corporation.
3124 (socket) and C3C3124 (plug) can be used. Thus, when the cassette deck 10 is completely inserted into the sleeve 101, the sleeve 101
Each bin of a plug 102 attached to the back side of the cassette deck 10 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.

The input/output signals in each head unit of the first embodiment are as follows:
As shown in FIG. 1, the output for the front speakers 20 (
SP 0UT (F)), output for rear speaker 22 (
SP 0UT(R)), AUX input (AUX IN),
Accessory human power (ACC) to be powered from the battery via the accessory switch in order to work with the accessory switch of the automobile, battery power input (BATT) to be powered directly from the battery, and the above two power sources Ground (GND) corresponding to the input terminal, Light control input (LIGHT CONT) whose voltage changes in conjunction with the illuminance adjustment of various instruments in the car and controls the illuminance adjustment of the head unit, Connected to the antenna installed in the car. It includes an antenna input (ANT) and a system control signal (SYS/C0N). The system control signal (SYS/C0N) is used to remotely control a CD changer 16 installed in the rear trunk of a car, for example, separately from the head unit in the dash board, via the control section on the front panel of the head unit. This is a control signal sent and received, and in particular, even when a cassette deck or DAT player 14 is selected and installed as a head unit, the CD in the CD changer 16 can be pre-arranged via the operation section of the front panel. This is used to select and play music according to the program you have set. Note that the accessory power supply (ACC) is used to turn the power of the head unit 0N10FF in conjunction with the accessory switch.

Also, the battery power supply (BATT) is set to 0 when the accessory power supply is 0.
Even in the FF state, various memories inside the head unit are retained, and the voltage is adjusted to a predetermined level through a stabilizing circuit within the head unit, so that the voltage is always constant regardless of the power consumption of other electrical devices in the car. It is designed to be used for head unit operation. In addition, each head unit: In some cases, the power antenna installed outside the vehicle can be connected to the tuner section built into the head unit.
N10 Control signal (PO
WERANTONloFF) is output. Furthermore, from each head unit, turn on the power switch of the head unit.
10 In conjunction with FF, turn on the power of CD changer 16 to 0N.
A control signal (POWER0N10FF) that causes the power to turn 10FF is output.

Each head unit in this embodiment includes a 4-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.

An example of the arrangement of each terminal in the socket 103 and plug 101 of the 24-pin connector 18 in this first embodiment is shown in Table 1 below. Furthermore, CD changer 16
A digital data bus (D2B) capable of bidirectional data transfer is adopted as a transmission line for transmitting system control signals (SYS/C0N) for remote control by each head unit attached to the sleeve 101 of the dash board. There is. The 9th pin and the 13th pin are reserved terminals for system control signal expansion.

Table 1 Pin number Terminal I ACC 2GND 3 BATT 4 ANT 5 LIGHT C0NT 22 POWERANT 0N10FF23
POWER0N10FF 24 OND Second to fourth embodiments of the present invention will be explained below in order, but the same components and members as those in the first embodiment are shown with the same reference numerals, so the basic information regarding them will be explained below. Since it is essentially the same as that in the first embodiment, detailed explanation will be omitted. Also, components and members corresponding to those in the first embodiment are shown with corresponding reference numerals, and therefore, the second to fourth embodiments will mainly be explained with respect to the parts that are different from the first embodiment.

In the second embodiment shown in FIG. 2, a cassette deck 10a, a CD player 12a, and a DAT player 14a each containing a built-in two-channel power amplifier and tuner for the front speakers 20 are replaceably installed in the dash board of an automobile. It is envisaged that it can be attached to a sleeve that is That is, these head units do not have built-in 2-channel power amplifiers for the rear speakers 22, and the 2-channel power amplifiers 24 for rear speakers are installed in the rear trunk of the automobile, etc., separately from each head unit. This makes it possible to reduce the size and weight of the head unit and reduce costs compared to the first embodiment. The power amplifier 24 is activated by receiving the line out output (LINE 0UT) from each head unit, and outputs the speaker output (SP 0UT) to the rear speaker 2.
2. For this reason, each head unit in this embodiment sends an output (SP 0UT) for the front speaker 20, and a line out output (LINE 0UT) to the rear speaker 2.
Furthermore, a control signal (POWER0N10FF) for interlocking the power of the power amplifier 24 with the CD changer 16 is sent to the ON10FF of the power switch of each head unit.

An example of the terminal arrangement of the 24-pin connector 18a in this second embodiment is as shown in Table 2 below.

Table 2 Pin numbers Total ACC 2GND 3 BATT 4 ANT 5 LIGHT C0NT 22 POWERANT 0N10FF23
POWER0N10FF 24 GND 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 lOb, the CD player 12b, and the DAT player 14b, are replaceable in a single sleeve. Can be removably mounted. 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 for front and rear speakers from each head unit (LINE 0UT (F), LINE 0UT (
R)) is connected to the 4-channel power amplifier 2 installed in the rear trunk of a car, etc. via the 24-bin connector 18b.
The speaker output (SP
0UT(F) and SP 0UT(R)) are sent to the front speaker 20 and rear speaker 22, respectively.

From the head unit, the operation of this power amplifier 26 along with the CD changer 16 is controlled by the ON10 of the head unit.
Control signal for interlocking with F F (POWERON
loFF) is sent via connector 18b.

An example of the pin arrangement of the connector 8b in the third embodiment shown in FIG. 3 is shown in Table 3 below.

Table 3 Pin numbers Total ACC 2GND 3 BATT 4 ANT 5 LIGHT C0NT 15'- 22POWERANT 0N10FF 23 POWER0N10FF 24 GND The configuration of the fourth embodiment is as shown in FIG. A plurality of head units, ie, a cassette deck loc, having a group of connection terminals.

The head unit of either the CD player 12c or the DAT player 14c is optionally configured to be mounted within 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 the size and weight as well as the cost.

FIG. 5 shows a schematic configuration of each head unit in the fourth embodiment. Note that the equipment configuration is slightly different depending on whether an analog equipment cassette deck 1Oc) is used as the head unit or a digital equipment (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 dotted lines.

A 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 motor, etc.) is sent to a preamplifier (or RF
After being amplified and shaped by the amplifier) 32, the 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 using the operation switch 31 . Also the second
The microcomputer 40 has a display 4 which displays the operation state of the head unit by means of an operation switch 31.
2 and system control signal (SYS/C0N
) is sent. The system control signal (S
YS/C0N) is sent and received to remotely control the CD changer 16, and is also connected to each device that is separated from each head unit and installed separately in the car, that is, D
/A converter unit 50 and tuner unit 60
As will be described later, control signals for remote control are also transmitted and received. Furthermore, the second microcomputer 40 sends out a power control signal (POWER0N10FF) to turn ON10 the power to the CD changer 16, D/A converter unit 50, and tuner unit 60.
Control FF.

An example of the configuration of the D/A converter unit 50 is shown in FIG. CD player 12 as head unit
When using a digital audio device such as C or DAT 14 c, the digital signal CD10UT(1)) transmitted via the 24-bin connector 18c or the digital signal DloLIT(2) transmitted from the CD changer 16.
)) is first input to P via an input changeover switch 90 which is controlled by a system control signal (SYS/C0N).
LL52 corrects the distortion on the time axis of the digital signal,
After unnecessary frequency components are removed by the digital filter 54, the signal is converted into an analog signal by the D/A converter 56. From the obtained PAM wave, only the audio signal is extracted by the LPF 58 and sent to the tuner unit 60 as an analog signal (A10UT). In addition, the periodic signals required when converting to analog signals are system control signals (
SYS/C0N) is transmitted to and received from the head unit.

An example of the configuration of the tuner unit 6o is shown in FIG. In this embodiment, a digital synthesizer tuner is adopted, and the system control signal (SYS/C0
N), the PLL synthesizer 62 receives a signal that controls AM/FM selection and tuning in the tuner.
The AM tuner section 6 sends a control signal to increase/down the frequency to match the desired channel of M or FM.
4 or FP! It is transmitted to the i-tuner section 66, and the antenna (
The radio signal from the ANT) is sent via a changeover switch 68 to an input changeover switch 70 that is controlled by a system control signal (SYS/C0N). The λ power selector switch 70 further includes an AUx input signal (AUX IN) and a first and second analog input signal (A/IN(1), A
/IN(2)) is sent. The first analog input signal (
A/IN (1)) is the analog output from the cassette deck loc, which is an analog device, is sent via the connector 18c, and the second analog signal (A/IN (2)) is sent to the CD player 12c or the like. When a digital device such as a DAT 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/C0N) 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 Analog output from head unit (A10UT(1)) and AU
If the head unit is a digital device, switch the input changeover switch 70 between the analog output (A10UT(2)) from the D/A converter unit 50 and the
Control is performed to switch between the two and the UX. Furthermore, when AUX input (AUX IN) is selected by the head unit, the system control signal (SYS/C0N) controls the input selector switch 70 to switch to the AUX input.

The signal from the input selector switch 70 is sent to the volume control circuit 72. The signal is sent to the balance control circuit 74 and transmitted to the tone control circuit 78 via the buffer amplifier 76. Further, a fader control circuit 82 is provided via a buffer amplifier 80.
After the output of the front speaker 20 and rear speaker 22 is adjusted, the line out output (LINE 0UT (F
), LINE 0UT(R)) and sent to the power amplifier 28. The amplified output signals (SP 0UT (F), SP 0UT (R)) are guided to the front speaker 20 and the rear speaker 22, respectively, and converted into outputs.

Here, the volume control circuit 72, the balance control circuit 7
4. The tone control circuit 78 and the fader control circuit 82 are each remotely controlled by a system control signal (SYS/C0N).

This tuner unit 60 includes a DC/DC converter 8 for stabilizing the power supply voltage to each head unit.
4 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/minus power source, the battery power source (BATT) can be stabilized and converted into a negative voltage by this DC/DC converter 84.

These D/A converter units 50. Naturally, it is also necessary to supply power to the tuner unit 60 itself. An example thereof is shown in conjunction with FIG. 6 for a D/A converter unit 50. The battery power (BATT) supplied via the connector 18c is connected to the DC/DC converter 86.
The resulting +5V, -5V and -15V voltages are used within the unit 50. If a particularly large power supply voltage is not required, the power (DC) output from the DC/DC converter 84 built into the tuner unit 60 may be used as is. Inside the tuner unit 60, a constant voltage power source (DC) is used similarly to each head unit.

An example of the pin arrangement of the connector 8c used in the fourth embodiment is shown in Table 4 below.

Table 4 Pin numbers Total ACC 2GND 3 BATT 4 DC 5LIGHT C0NT 22 POWERANT 0N10FF23
POWER0N10FF 24 GND In the second to fourth embodiments described above, the power amplifier is installed in the trunk of a car, but the present invention is not limited to this. For example, as shown in FIG. 9, a power amplifier 110 that has been downsized by using a small power IC is provided with a plug 104 corresponding to a head unit (socket behind the cassette deck 10 in the illustrated example) 103 on the front of the power amplifier 110. ,
A socket 105 corresponding to the plug 102 at the back of the sleeve 101 is provided on the back side, and the outer dimensions of the power amplifier 110 are also formed to correspond to the inner dimensions of the sleeve 101, so that the back surface of the sleeve 101 and the head unit are connected. It is also possible to arrange it between.

In this case, power from the battery is supplied to the head unit via the power amplifier 110.

Further, in the first to fourth embodiments, the ON10 F F of the power supply of the power amplifier etc. is the system control signal (SY
A control signal (POWER0N10F) different from S/C0N)
F), but it is also possible to configure this control to be performed using a system control signal (SYS/C0N). Furthermore, it is sufficient that each head unit is formed to correspond to the inner dimensions of the sleeve, at least the part that is attached to the inside of the sleeve is removed, and the shape of the front operation panel of each head unit can be changed as appropriate. Of course it is.

<Effects of the Invention> According to the present invention described above, the opening in the dash board of an automobile allows head units of various analog or digital audio equipment such as cassette decks, CD players, and DAT players to be replaceable, detachable, and selectable. Since it can be installed in a single sleeve installed in a space, etc., various software can be enjoyed inside the vehicle. Furthermore, according to the present invention, the power amplifier for the front or rear speakers is separated from each head unit attached to the dash board and installed as an external device, making it possible to reduce the size and weight of each head unit and reduce costs. At the same time, the sound quality is improved.

[Brief explanation of the drawing]

1 to 4 are schematic block diagrams showing an embodiment of the present invention, FIGS. 5 to 7 are block diagrams showing a schematic structure of each unit in the configuration shown in FIG.
9 to 9 are perspective views of essential parts showing different aspects of the mounting relationship between the head unit and the sleeve. Explanation of symbols 10.10a, lOb, loc: Kase Nododetsuki 12
．． 12a, 12b, 12c: CD player 14.14a
, 14b, 14c: DAT18.18a, 18b, 18
c: Connector 24, 26, 28: Power amplifier 50: D/C converter unit

Claims (5)

[Claims] (1) Multiple audio systems that have approximately the same external dimensions, a group of connection terminals that have a common arrangement in a common position, and each with a built-in 2-channel power amplifier for front (or rear speakers) A single sleeve configured to allow equipment to be shared, which is installed at any opening in a vehicle interior and has an inner dimension corresponding to a common outer dimension of the audio equipment; and the audio equipment is placed within the sleeve. connector means disposed on the back side of the sleeve so as to fit correspondingly to the connection terminal group in the audio equipment when the audio equipment is stored in the sleeve; External connection means connected to the connector means for achieving connection between the connection terminal group in the audio equipment and external equipment including at least a battery, front and rear speakers, and a power amplifier for rear (or front) speakers; , a first control means for operating the rear (or front) speaker power amplifier in conjunction with ON/OFF of the audio equipment. composition. (2) A connection configuration for an automobile audio device according to claim 1, wherein the audio device has a built-in tuner. (3) In the case where the external device includes a tuner unit, the device further includes a second control means for remotely controlling the operation of the tuner unit through operations on the audio device. A connection configuration in an automotive audio device according to claim 1. (4) The above external equipment includes a CD changer,
The automobile audio equipment according to claim 1, further comprising third control means for remotely controlling the operation of the CD changer through an operation on the audio equipment. Connection configuration in. (5) The above external equipment includes a CD changer,
The automobile according to claim 3, characterized in that the second control means also controls the operation of the CD changer to be remotely controlled through operations on the audio equipment. Connection configuration for audio equipment.