JP2000092600A - On-vehicle audio device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically attain an optimum sound volume at the time of opening a sunroof or a door window by providing a front seat sound output means and a rear seat sound output means, detecting the open/closed state of an opening/closing part for partitioning an automobile compartment and the outside of it and increasing the sound level of only the front seal output means. SOLUTION: When a passenger opens the sunroof or the door window, it is detected that the sunroof 11 or the door window 12 is open and an H layer is outputted to an OR:13. The OR:13 outputs the H level to a microcomputer 14 at the time of being open. The microcomputer 14 judges that the sunroof or the door window is open and instructs and electronic sound volume 23 to increase the sound volume on a front side for the sound volume set beforehand. As a result, the sound volume of front speakers 251R and 251L is increased and a driver easily enjoy listening with the increase of audio output even when noise is present.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle audio device capable of controlling an optimum volume in accordance with an open / close state of a window or the like.

[0002]

2. Description of the Related Art In an on-vehicle audio device, when an opening / closing portion such as a sunroof or a door window is opened during traveling, the device is optimally adjusted in a fully closed state due to external noise such as road friction noise and wind noise. It becomes hard to listen at the volume. Therefore, the driver manually operated the volume adjustment volume so as to increase the volume.

Another method is to install a microphone for detecting noise in a vehicle, detect an increase in noise caused by opening a sunroof or a door window, and control the audio device to increase the volume by a predetermined level. There is also.

[0004]

When the driver operates the volume control volume during driving, there is a problem in safe driving. On the other hand, in the method of adjusting the volume by detecting noise with a microphone, the device becomes complicated and the entire audio device becomes expensive. In addition, the microphone reacts to passenger noise, vehicle interior noise such as audio device output, noise, etc.
There is also a problem that the volume increases when unintended.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle-mounted audio apparatus which can automatically control the sound volume to an optimum level when a sunroof or a door window is opened.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to a front seat sound output unit installed at the front of a vehicle and a rear seat sound output unit installed at the rear of the vehicle. In the in-vehicle audio device that outputs each,
Open / closed state detecting means for detecting the open / closed state of an opening / closing section that separates the interior of the vehicle from the interior of the vehicle, and sound only of the front seat sound output means when the open / closed state detection means detects that the open / closed section is open. A sound level control means for controlling so as to increase the level is provided.

Further, in a vehicle-mounted audio device for outputting an input audio signal to a front-seat audio output means provided at a front part of a vehicle and a rear-seat audio output means provided at a rear part of the vehicle, a vehicle interior and a vehicle exterior are provided. Opening / closing state detecting means for detecting the opening / closing state of the partitioning opening / closing section, auxiliary sound output means installed near the driver's seat of the vehicle, and when the opening / closing state detecting means detects that the opening / closing section is in an open state, A sound output control means for controlling the input sound signal to be output also to the auxiliary sound output means is provided.

Further, in a vehicle-mounted audio apparatus for outputting an input audio signal to a front-seat audio output means installed in a front part of a vehicle and a rear-seat audio output means installed in a rear part of the vehicle, respectively, Opening / closing state detecting means for detecting the opening / closing state of the partitioning opening / closing section, and when the opening / closing state detecting means detects that the opening / closing section is in an open state, the sound output direction from the front seat sound output means is the driver direction. And a sound direction control means for controlling a mounting angle of the front seat sound output means.

[0009]

FIG. 1 is a block diagram showing the configuration of a vehicle-mounted audio device according to a first embodiment of the present invention. Hereinafter, description will be made with reference to the drawings. In this example, the volume of a front speaker close to the driver is controlled based on the open / close state of a window or the like. Reference numeral 11 denotes a sunroof opening detection unit that detects that the sunroof (corresponding to one of the opening and closing units) is in an open state. Reference numeral 12 denotes a door window opening detection unit that detects that the door window (corresponding to one of the opening and closing units) is in an open state. Reference numeral 13 denotes a microcomputer which outputs an opening signal (H level) when one or both of the sunroof opening detecting section 11 and the door window opening detecting section 12 are in the open state.
Is an OR circuit that outputs the signal to A control unit 14 controls the volume of the audio source based on the open signal of the OR circuit 13. Reference numeral 15 denotes a selection switch for selecting whether to operate the volume control. Reference numeral 23 denotes an electronic volume for controlling the output (volume) of the input audio signal (tape, radio, CD, MD, navigation sound signal).
241R, 241L, 242R and 242L are front and rear left and right amplifiers for amplifying the controlled sound signal. 251R and 251L are left and right front speakers installed at a lower part of a front door for converting an acoustic signal into a sound,
Reference numerals 252R and 252L denote left and right rear speakers installed on a rear grille for converting an acoustic signal into sound.

As a method of detecting the opening of the sunroof opening detecting section 11 and the door window opening detecting section 12, for example, a contact switch pressed by the sunroof glass or the door window glass is connected to the end of the sunroof or the door window (fully closed), respectively. Section), when the contact switch is pressed and the switch is turned on, it is in the fully closed state,
When the switch is in the off state, it is determined that the switch is in the open state (even when the switch is opened even if it is slightly open). It should be noted that two contact switches are provided at an interval, and a state in which the two contact switches are slightly opened by a combination of on and off (one contact is on and the other one is off) is not an open state. There is also a way to do it.

As another opening detection method, an actuator for opening and closing the sunroof or the door window detects an increase in load when the sunroof or the door window is fully closed, and stops driving (stops closing). After the increase in load is detected, the sunroof or the door window is fully closed until it is driven in the next opening direction, and in other states (if it is driven in the opening direction, it will be driven in the closing direction). May be determined to be in the open state.

Next, the volume control operation will be described. When the passenger opens the sunroof or door window,
The sunroof opening detection unit 11 or the door window opening detection unit 12 detects that the vehicle is in the open state, and outputs an H level (L level in the closed state) to the OR circuit 13. O
The R circuit 13 outputs an H signal to the microcomputer 14 when one or both of the sunroof and the door window are open.
Output level. The microcomputer 14 determines that the sunroof or the door window has been opened, and instructs the electronic volume 23 to increase the volume on the front side by a preset volume (for example, 3 dB). As a result, the volume of the front speakers 251R and 251L increases, and the driver can easily hear even if there is noise due to the increased audio output. Note that the rear speaker 252R,
252L is arranged near the position of the ears of the occupants in the rear seats. When the volume is increased, the user feels noisy. Therefore, the volume is not increased and is maintained. Therefore, the microcomputer 14 does not change the volume of the electronic volume 23 on the rear side.

As an example of a specific volume control, the microcomputer 14 uses the input selector of the electronic volume 23 that can adjust the volume according to the type of audio input, and the microcomputer 14 controls the entire (both front and rear) outputs by 3 dB. Then, the fader of the electronic volume 23 is operated to lower only the output on the rear side by 3 dB. As a result, only the sound volume on the front side increases by 3 dB, and the sound volume on the rear side does not change.

When both the sunroof and the door window are closed, the OR circuit 13 outputs an L level to the microcomputer 14. The microcomputer 14 determines that both the sunroof and the door window are closed, and stops the volume control. As a result, the volume returns to the original state. As described above, in this embodiment, since the open / closed state of the window operated by the driver is detected and the volume of the front speaker close to the driver is increased, it is possible to easily hear even if the noise increases. Further, since the volume is controlled only when the window is in the open state, it is possible to prevent the volume from unintentionally increasing when unintended.

FIG. 2 is a block diagram showing a configuration of a vehicle-mounted audio device according to a second embodiment of the present invention. Hereinafter, description will be made with reference to the drawings. In this example, the operation of the sub-speaker arranged near the driver is controlled based on the open / closed state of the window or the like. Reference numeral 243 denotes an amplifier for a sub speaker that amplifies the controlled acoustic signal. Reference numeral 253 denotes a sub-speaker installed above the front door beside the driver's seat for converting an acoustic signal into a sound. This speaker is originally used for voice guidance of navigation and the like. Note that the sunroof opening detection unit 11, the door window opening detection unit 12,
OR circuit 13, microcomputer 14, selection switch 15, electronic volume 23, amplifiers 241R, 241L, 242
R, 242L, front speakers 251R, 251L,
The rear speakers 252R and 252L have the same names, functions, and functions as those of the first embodiment, and thus are assigned the same numbers and description thereof is omitted.

Next, the volume control operation will be described. When the passenger opens the sunroof or door window,
The sunroof opening detection unit 11 or the door window opening detection unit 12 detects that the vehicle is in the open state, and outputs an H level (L level in the closed state) to the OR circuit 13. O
The R circuit 13 outputs an H signal to the microcomputer 14 when one or both of the sunroof and the door window are open.
Output level. The microcomputer 14 determines that the sunroof or the door window has been opened, and sends an audio signal to the sub-speaker 2 at a predetermined volume to the amplifier 243.
53 is instructed to output. As a result, the front speakers 251R, 251L, the rear speakers 252R,
In addition to the 52L, the sub-speaker 253 arranged closer to the driver's ear also outputs sound, thereby increasing the volume to the driver. It will be easier to hear. In the case of a stereo, the sub-speaker 253 outputs a right sound signal. In addition, this example is particularly effective when listening to general music. In this case, the audio output of navigation is stopped from the sub-speaker 253, and the music signal is output instead.

When both the sunroof and the door window are closed, the OR circuit 13 outputs an L level to the microcomputer 14. The microcomputer 14 determines that both the sunroof and the door window are closed, and stops the volume control. As a result, the volume returns to the original state (the output to the sub speaker 253 is stopped). As described above, in this embodiment, since the open / closed state of the window operated by the driver is detected and the sub-speaker arranged near the driver is operated to increase the volume, it is easy to hear even if the noise increases. .

FIG. 3 is a block diagram showing the configuration of a vehicle audio system according to a third embodiment of the present invention. 4A and 4B are structural views of a speaker of a vehicle-mounted audio device according to a third embodiment of the present invention. FIG. 4A is a schematic diagram showing a speaker installation state (window closed state), and FIG. 4B is a schematic diagram showing a speaker installation state. FIG. 3 (c) is a cross-sectional view of the speaker movable section (window closed state), and FIG. 4 (d) is a cross-sectional view of the speaker movable section (window open state). Hereinafter, description will be made with reference to the drawings. In this example, the direction of the front speaker is controlled based on the open / close state of a window or the like.

Reference numeral 3 denotes left and right front speakers 251R and 251 installed at the lower part of the front door according to an instruction from the microcomputer 14.
The angle adjustment mechanism for changing the mounting angle of L from right beside to obliquely upward and directing the sound output from the front speaker 251R (or 251L, the same applies hereinafter) toward the driver's head. A fixed frame 31, a movable frame 32 connected to a rotating shaft 33 holding the speaker 251R and adjusting the angle of the sound output direction of the speaker 251R;
The microcomputer 1 supports the fixed frame 31 and the movable frame 32 so as to be rotatable.
4 includes a rotation shaft 33 that is rotated by a motor and a cam (not shown) in response to a signal from the motor 4, and a screw 34 that attaches the speaker 251 R to the movable frame 32. The sunroof opening detection unit 11, the door window opening detection unit 12, the OR circuit 13, the microcomputer 14, the selection switch 15, the electronic volume 23, the amplifiers 241R, 241L, 242R, 242.
L, front speakers 251R, 251L, and rear speakers 252R, 252L have the same names, functions, and functions as those of the first embodiment, and thus are assigned the same numbers and their explanations are omitted.

Next, the sound direction control operation will be described. When both the sunroof and the door window are in the closed state, the front speakers 251R and 251L are installed such that the sound output direction is right beside as indicated by an arrow (see FIGS. 4A and 4C). When the passenger opens the sunroof or the door window, the sunroof opening detecting unit 11
Alternatively, the door window opening detecting section 12 detects that the door is open, and changes the H level (the L level when the door is closed) to O.
Output to the R circuit 13. The OR circuit 13 outputs an H level to the microcomputer 14 when one or both of the sunroof and the door window are open. Microcomputer 1
4 determines that the sunroof or the door window has been opened, and instructs the angle adjustment mechanism 3 to tilt the front speakers 251R and 251L upward by a preset angle. As a result, the front speaker 25
1R and 251L output sound in the direction of the driver's ear (arrow), and the driver can easily hear even if there is noise due to the increase in audio output (FIG. 4B,
(D)). The left and right front speakers 251R,
The inclination angle of 251L differs based on the positional relationship between each speaker and the driver, and is set such that the inclination angle of front speaker 251R on the driver's seat side is larger.

When both the sunroof and the door window are closed, the OR circuit 13 outputs an L level to the microcomputer 14. The microcomputer 14 determines that both the sunroof and the door window are closed, and returns the speaker to the original mounted state. As described above, in this embodiment, since the front speaker is turned toward the driver by detecting the open / closed state of the window operated by the driver, it is possible to easily hear even if the volume to the driver increases and the noise increases. .

[0022]

As described above, according to the present invention, it is possible to provide a vehicle-mounted audio apparatus that can automatically control the sound volume to an optimum level when the sunroof or the door window is opened.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of a vehicle-mounted audio device according to a first embodiment of the present invention.

FIG. 2 is a configuration block diagram of a vehicle-mounted audio device according to a second embodiment of the present invention.

FIG. 3 is a configuration block diagram of a vehicle-mounted audio device according to a third embodiment of the present invention.

FIG. 4 is a structural diagram of a speaker of a vehicle-mounted audio device according to a third embodiment of the present invention.

[Explanation of symbols]

11 ··· Sunroof opening detection unit 14 · · ·
· Microcomputer, 12 · · · door window open detection unit,
15 ... selection switch, 13 ... OR circuit,
23 ··· Electronic volume, 24
1R, 241L, 242R, 242L, 243 ... amplifier, 251R, 251L ... front speaker, 2
52R, 252L ... rear speaker, 32 ...
Movable frame, 253 ... sub speaker, 3
3 ··· Rotating axis, 3 ··· Angle adjustment mechanism,
34 screws, 31 fixed frame.

Claims (3)

[Claims] An in-vehicle audio device for outputting an input audio signal to a front seat audio output unit installed in a front portion of a vehicle and a rear seat audio output device installed in a rear portion of the vehicle. An opening / closing state detecting means for detecting an opening / closing state of an opening / closing section to be partitioned, and when the opening / closing state detecting means detects that the opening / closing section is in an open state, the sound level of only the front seat sound output means is increased. An in-vehicle audio device comprising a sound level control means for controlling. 2. An in-vehicle audio device for outputting an input audio signal to a front-seat audio output means installed in a front part of a vehicle and a rear-seat audio output means installed in a rear part of the vehicle. Opening / closing state detecting means for detecting the opening / closing state of the partitioning opening / closing section, auxiliary sound output means installed near the driver's seat of the vehicle, and when the opening / closing state detecting means detects that the opening / closing section is in an open state, An in-vehicle audio device comprising: an audio output control unit that controls the input audio signal to be output to the auxiliary audio output unit. 3. An in-vehicle audio device for outputting an input audio signal to a front-seat audio output means installed at a front part of a vehicle and a rear-seat audio output means installed at a rear part of the vehicle. Opening / closing state detecting means for detecting the opening / closing state of the partitioning opening / closing section; and when the opening / closing state detecting means detects that the opening / closing section is in the open state, the sound output direction from the front seat sound output means is the driver direction. A vehicle-mounted audio apparatus comprising: a sound direction control means for controlling a mounting angle of the front seat sound output means such that