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DESCRIPTION JP2000324222

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DESCRIPTION JP2000324222
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
car audio system mounted on a vehicle, and more particularly to an adapter for a car audio
system.
[0002]
2. Description of the Related Art As is well known, with the recent development of mobile-tomobile communication, telephone calls by mobiles such as passenger cars and general telephone
lines are relatively frequently conducted. By the way, if the mobile phone or car telephone in
which the passenger is in the process of receiving the call signal while listening to the car audio
receives the ringing signal, the sound of the car audio interferes with the call. It is necessary to
lower the volume of the car audio and operate the hook button of the mobile phone to set it in
the reception state.
[0003]
However, such order control at the time of an incoming call is very troublesome to the
inexperienced person, and often after the start of the call, it is often noticed that the sound of the
car audio gets in the way of the call, and the volume of the car audio Sometimes the knob was at
a distance from the caller's hand, and it was sometimes necessary to ask the passenger to operate
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the volume knob. Of course, when the caller is a driver, the above-mentioned operation of the
volume knob and the hook button is an operation during driving requiring alertness, so these
operations are distracted and it is necessary for driving the vehicle. There was a risk that
attention could be neglected.
[0004]
Then, at the end of a call by a car phone or a mobile phone, the volume of the car audio is
manually restored to continue the listening, but this recovery operation is also very troublesome,
and it is also possible to run Even when making an outgoing call from a middle vehicle using a
mobile phone or the like, the same troublesome operation as described above is required.
[0005]
For this reason, when listening to the car audio, the present applicant reduces the volume of the
car audio when the mobile phone or the car telephone in which the occupant is in the band
receives the call signal, and after the call ends, A "car audio adapter" for recovering the same
volume was proposed in Japanese Patent Application No. 10-355423 (filing date: November 30,
1998).
That is, this "car audio adapter" is detachably engaged with an adapter body incorporating a
carrier wave detection circuit capable of detecting a carrier wave of a mobile telephone in a
vehicle compartment and a volume control of a car audio mounted on a vehicle. A sound volume
controller is provided, and the adapter body incorporates a control circuit for giving a signal for
reducing the sound volume to the sound volume controller when the outgoing carrier wave is
detected.
[0006]
That is, in this "car audio adapter", when the mobile telephone or car telephone of the vehicle
occupant receives the ringing signal, the volume of the car audio is automatically lowered, and
after the call ends Because the volume is restored, there is an advantage that you can make a call
without being disturbed by the sound of car audio. However, this "car audio adapter" can
automatically control the volume of car audio before and after a call, but since it is necessary to
separately operate a mobile telephone such as a mobile telephone, it is necessary to There is a
problem that it is not possible to avoid the risk of not being able to concentrate on the driving of
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2
the vehicle, being aware of the response operation.
[0007]
SUMMARY OF THE INVENTION It is an object of the present invention to easily set in existing
car audio in view of the current state of the conventional car audio as described above, and the
sound of the car audio at the time of a call by a portable telephone etc. The goal is to have a car
audio adapter that can answer incoming calls without disturbing any operations.
[0008]
SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is an
adapter having a telephone case incorporating a carrier wave detection circuit capable of
detecting a carrier wave of a mobile telephone in a vehicle compartment and capable of
accommodating a mobile telephone. A main body and a volume controller detachably engaged
with a volume knob of a car audio mounted on a vehicle, wherein the adapter main body reduces
the volume relative to the volume controller when the outgoing carrier wave is detected. A builtin control circuit for giving a signal and a hook on operator and a hook off operator capable of
pressing the hook on button and the hook off button of the accommodated mobile telephone,
respectively, the hook on operator detecting the outgoing carrier wave When the mobile phone is
in a call state by operating the hook on button, the hook Operator is to propose a car audio
adapter to a standby state mobile telephone by pressing the hook off button manually call end
switch.
[0009]
In the following description of the preferred embodiment of the present invention, 1) the call
termination switch is a remote control switch located at the hand of an occupant, 2) a structure
used in combination with the hand-free unit of the mobile telephone , 3) Adapter body with builtin carrier wave detection circuit that can detect the carrier wave of mobile phone in the vehicle
compartment, phone case that can accommodate mobile phone, and car audio volume knob
mounted on the vehicle A sound volume controller to be engaged, the adapter body incorporates
a control circuit for giving a signal for reducing the sound volume to the sound volume controller
when the outgoing carrier wave is detected, and the telephone case is accommodated Hook-on
operator and hook-off operation capable of pressing and operating the hook-on button and the
hook-off button of the mobile telephone When the outgoing carrier is detected, the hook-on
operator operates the hook-on button to place the mobile telephone in a call state, and the hookoff operator operates the call end switch to manually operate the hook-off button. The structure
in which the mobile telephone is placed in the standby state is described.
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[0010]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be
described in detail with reference to the drawings.
As understood from FIG. 1, the car audio adapter according to the present invention comprises a
resin-molded adapter body 10 which can be mounted on an instrument panel or center sole of a
vehicle, and the adapter supplied with a power supply voltage from a cigarette lighter socket A
carrier detection circuit 11 and a control circuit CPU, which will be described later in detail with
reference to FIG.
[0011]
In addition, on the surface of the adapter body 10, a power switch 12, a call end switch 13, and a
volume set switch 14 for powering on are arranged, and manual operation of the volume set
switch 14 instructs forced operation of the volume knob of car audio. it can.
The adapter main body 10 incorporates an end reception element 16 (shown in FIG. 6) which
receives a command signal from an oscillator 15 operated by a passenger.
The oscillator 15 is preferably easy to attach to, for example, a steering wheel of a vehicle, but
the oscillator 15 may be freely portable so that other occupants can operate it.
[0012]
The output code of the adapter body 10 is a control circuit CPU (described later. And a volume
controller 20 controlled by the output signal of. The volume controller 20 has a geared motor 21
which is rotated in the forward or reverse direction by the output signal of the control circuit
CPU, and a decelerating output shaft 22 of the geared motor 21 supports an axial joint 23 which
can be attached to the volume knob shaft 31 of the car audio 30. It is The coaxial joint 23, which
can be integrally rotated with the volume knob shaft 31, is provided with a torque limiter
consisting of a coil spring 23a and a small screw 23b, as shown in FIG. When a rotational torque
equal to or greater than a predetermined value is applied to the shaft 23, the decelerating output
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shaft 22 and the shaft joint 23 can slide.
[0013]
Further, the volume controller 20 is provided with a ferromagnetic fixing cap 24 surrounding the
decelerating output shaft 22 of the geared motor 21, and a base flange 24a of the fixing cap 24
is fixed to the surface of the car audio 30 by double-sided adhesive tape or the like. It can be held
by suction on the magnet ring 25. In the case of this suction holding, the hooking pin 24b fixed
to the base flange 24a is inserted into the corresponding fixing hole 25a of the magnet ring 25,
so the axial joint 23 is fitted to the volume knob shaft 31 of the car audio 30 and the fixing cap is
also fixed. By fixing 24 to the magnet ring 25, the volume knob shaft 31 can be rotated in any
direction by the geared motor 21. When the volume knob shaft 31 is rotated by the geared
motor 21, the volume knob shaft 31 may reach a movable limit or the like, and an unreasonable
rotational torque may act between the geared motor 21 and the volume knob shaft 31. In this
case, the torque limiter works to prevent the force (rotational torque) from acting on the volume
knob shaft 31.
[0014]
FIGS. 3 to 5 show the details of the adapter body 10 described above, and the adapter body 10
having a non-slip rubber sheet 10a on the bottom is provided with a telephone case 32 capable
of accommodating a mobile telephone D such as a cellular phone. The mobile telephone D can be
accommodated inside the telephone case 32 whose one end is opened, with the antenna a
removed. As a mobile telephone D to be used, it is preferable to use an earphone jack connected
with a known hand-free unit, but when a hand-free directional microphone and a speaker are
attached to the adapter main body 10, special There is no need to use a hand-free unit.
[0015]
A storage position adjustment screw 34 capable of determining the storage depth with respect to
the telephone case 32 according to the mobile telephone D is screwed into the barrier 33 located
inside the telephone case 32. That is, since the other end of the storage position adjustment
screw 34 having a pad 35 at one end that receives the end face of the mobile telephone D to be
stored has the depth adjustment knob 36 located outside the telephone case 32, the same depth
adjustment knob By manually adjusting 36, the storage depth of the mobile telephone D relative
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to the telephone case 32 can be determined.
[0016]
Further, a pair of support frames 37A and 37B located on both sides in the transverse direction
are positioned inside the phone case 32, and are accommodated in the phone case 32 by the
pressure springs 37a cut and raised from the support frames 37A and 37B. The mobile
telephone D thus set is placed in a fixed state. A first control lever 40 and a second control lever
41, which can be tilted about the upper support shaft 39, are supported in parallel between the
support frames 37A and 37B, and these first control lever 40 and the second control lever One
end of 41 is led to the opposite side of the barrier 33 through a notch 42 formed in the upper
center of the barrier 33, and pins 45 for plungers 43a and 44a of the first solenoid 43 and the
second solenoid 44 respectively. Connected
[0017]
The first solenoid 43 and the second solenoid 44 are temporarily excited by the command signal
from the control circuit CPU described above, and although not shown, these plungers are
projected by solid lines by return springs. Each is biased towards the position. On the other hand,
the end portions of the first control lever 40 and the second control lever 41 opposite to the first
solenoid 43 and the second solenoid 44 are exposed to the hook on button b1 and the hook off
button b2 of the mobile telephone D. The hook on operator 46 and the hook off operator 47 are
respectively supported. That is, the hook on operator 46 and the hook off operator 47 are
provided at the tips of the adjusting screws 48 and 49 screwed into the screw holes of the first
control lever 40 and the second control lever 41. Adjustment knobs 52 and 53 positioned
outside the telephone case 32 are fixed to the opposite side of the hook off operator 47,
respectively. Therefore, by manually adjusting the adjustment knobs 52 and 53 in accordance
with the mobile telephone D to be used, the hook-on button b1 and the hook-off button b2 of the
mobile telephone D and the corresponding hook-on operators 46 and hook-off operators 47 The
hook on button b1 and the hook off button b2 can be reliably pressed by the hook on operator
46 and the hook off operator 47 by adjusting the relationship of
[0018]
FIG. 6 shows the signal system of the adapter main body 10 described above, and a carrier wave
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detection circuit 11 capable of detecting the carrier wave of the mobile telephone D in the
vehicle compartment is incorporated in the adapter main body 10. The signal is input to the
control circuit CPU that controls the volume controller 20 described above. Further, the control
circuit CPU receives an output signal from the power switch 12 for turning on the power supply
voltage and the volume setting switch 14 operated manually, and drives the geared motor 21 of
the volume controller 20 according to the calculation result according to the procedure
described later. , The rotation control of the volume knob shaft 31 of the car audio 30.
[0019]
FIG. 7 shows the control flow of the car audio adapter described above. When the power is
turned on by the power switch 12, firstly, the outgoing carrier wave of the mobile telephone D
(mobile telephone, PHF telephone, car telephone equipment etc.) inside the vehicle compartment
That is, it is checked whether there is a carrier wave of 800 MHz or 1,500 MHz (step S1). That is,
when the hook button of the mobile telephone D is operated in the vehicle compartment and the
other party is designated by the dial button, or when the designation signal is received and the
mobile telephone D in the vehicle compartment enters a reception state, Since the carrier wave is
transmitted, the carrier wave detection circuit 11 inputs the presence signal of the transmission
carrier wave to the control circuit CPU.
[0020]
For this reason, the control circuit CPU sends an output signal to the volume controller 20 only
for a predetermined time, applies an excitation voltage in the forward rotation direction to the
geared motor 21 of the volume controller 20 for a predetermined time, The sound pressure level
output from the speaker of the car audio 30 is reduced by rotating 31 at a constant angle in the
counterclockwise direction (step S2). As a result, even when the car audio 30 is in use, the
volume knob shaft 31 of the car audio 30 is automatically squeezed when the mobile telephone
D is in a calling state for a call, so quietness with a low sound pressure level can be achieved. You
can make calls in the normal state. Thereafter, since the control circuit CPU temporarily excites
the first solenoid 43, the plunger of the first solenoid 43 is temporarily retracted, and the first
control lever 40 is centered on the support shaft 39 and the counterclockwise as viewed in FIG.
Then, the hook-on operator 46 of the first control lever 40 is temporarily pressed, and the mobile
telephone D enters a call state (step S3). Therefore, the driver of the vehicle can make a call using
the hand-free unit coupled to the mobile telephone D without performing any manual operation.
When the call ends, the driver or the like operates the oscillator 15 to support the end of the call.
Therefore, when the receiving element 16 receives the command signal from the oscillator 15,
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the control circuit CPU temporarily excites the second solenoid 44. The second solenoid 44
causes the second control lever 41 to support the support shaft 39. The hook off button 47 on
the tip of the second control lever 41 is tilted as the center, and the hook off button b2 of the
mobile telephone D is pressed, and the mobile telephone D returns to the standby state again
(step S4). Thereafter, the control circuit CPU applies the excitation voltage in the reverse
direction to the geared motor 21 of the volume controller 20 for a fixed time, rotates the volume
knob shaft 31 clockwise by a fixed angle, and outputs the sound output from the speaker of the
car audio 30 The pressure level is increased (step S5).
[0021]
Also, since the monitoring of the outgoing carrier of the mobile telephone D is also performed
while the mobile telephone D is in use, the call is terminated and the hook button of the mobile
telephone D is pressed, and the outgoing carrier is lost. , Will be waiting. In this case, it is then
checked whether the volume set switch 14 has been manually operated (step S6). Then, when the
volume set switch 14 is not manually operated, this operation is repeated, but when the volume
set switch 14 is manually operated, the control circuit CPU performs a positive operation only
during the time when the volume set switch 14 is operated. Since the output signal in the reverse
direction is output to the volume controller 20, the volume knob shaft 31 is forcibly rotated, and
the volume of the car audio 30 is changed to the level desired to be listened to (step S7).
[0022]
The car audio adapter of the present invention can be used simply by removably connecting the
volume controller 20 to the position of the volume knob shaft 31 of the car audio 30 and
accommodating the mobile telephone D in the telephone case 32. Accordingly, there is an
advantage that it can be used by setting it to the existing car audio 30, and in the illustrated
embodiment, although the power source is taken from the cigarette lighter socket, the power
source of the car audio adapter may be a built-in power source.
[0023]
As apparent from the above description, according to the present invention, the volume of car
audio is automatically narrowed at the time of reception of the mobile telephone D simply by
setting to the existing car audio, and the mobile telephone Since D can be automatically switched
to the calling state, the volume of the car audio can be automatically restored at the end of the
call, and the simple mobile telephone D can be put into the standby state, thus requiring the
driver etc. to perform complicated operations. You can get a car audio adapter without any
problems.
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