Patent Translate Powered by EPO and Google Notice This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate, complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or financial decisions, should not be based on machine-translation output. DESCRIPTION JPS55141900 1 MM book 1 name of invention オーディオシステム 3. Detailed Description of the Invention The present invention is an automobile for which auto radio and car stereo switching are properly performed by combining an auto radio with 27 amps, a car stereo with four speakers and two amps in front, rear, left and right. It relates to an audio system. It is conventional practice to add a car stereo to an autoradio so that both the autoradio and the car stereo can be enjoyed, and various combinations of auto radio amplifiers, speakers and car stereo or their selective use. Has been devised. For example, the radio section is made up of 2 amps and 4 speakers, and 2 Ang car stereos are added to make it 4 amps and 4 speakers, or the radio section is made up of 47 amps and 4 speakers, and 2 ans car stereo is added to this to make a stereo In this case, the above four speakers are driven by the two angs, and so on are two examples. The problem with such a case is that there is play in the parts of EndPage: 1. For example, in the latter case, in the case of stereo, four amplifiers in the radio section are not used. Also, in the multi-speaker system such as 4-speaker, it is necessary to balance the front and rear, right and left, and its adjusters (left and right balance, front and rear fader) are provided. In order to adjust the volume of the front and rear speakers, it is necessary to set the radio fader in the case of a radio or rA in the case of a stereo. The occurrence of duplication of functions and idleness between the auto radio and the car stereo in this way not only reduces the operability of the user, but also has the drawback of causing an increase in cost. The present invention has been made in view of the above points, and it is a combination of a 2-amplifier autoradio, a 4speaker and a 2-amplifier car stereo, 27 radios with 4 radios, and 3 stereos with these radios. All amplifiers and speakers are used as 4 amplifiers and 4 speakers. Furthermore, front / rear balance of front and rear speakers when using a single radio and front / rear balance of front and 10-05-2019 1 rear speakers when using car stereo can be adjusted with faders always provided in the auto radio section It is an object of the present invention to provide an audio system with improved operability and cost reduction. オーディオシステム Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings. In the figure, 1 is an auto radio (car radio receiver), 2 is a car stereo (car cassette tape player) additionally connected to it, ANT is a receiving antenna, FL is a left front speaker, and BL is a left rear The speaker, PR is a front right speaker, and BR is a rear right speaker. Of the signals selected and received and demodulated by the auto radio 1 channel 11, the left channel audio signal SLl is led to the left channel level adjustment polyneim 13L through the left tone control circuit 12L, and at the same time the right channel audio The signal 8R + is led to the right channel level adjusting polymime 13m through the right tone control circuit 12m. A volume 14 connected in parallel between the output terminals of the tone control circuit 12c + 121 and having a slider grounded is a balancer for adjusting the volume ratio (left-right balance) all of the speakers FL (BL) and FR (BR). The sliders 13i and 13 'are connected to the input ends of two power amplifiers 15L 115m. The output terminal of the left channel power amplifier 15L (the output terminal on the high potential side because this amplifier is a BTL connection) L One of the variable resistors (faders) 16a of the fader control 16 having 12 variable resistors 16a and 16b Connected to One end of the fader 16m is connected to one end of the drive coil of the left front speaker FL, and the other end of the variable resistance portion 16m is connected to one end of the drive coil of the left rear speaker BL via the switching contact 17a of the switching portion 17. Ru. The other end of the drive coil of the speaker FL is directly connected to the low potential output end of the power amplifier 15L, and the other end of the drive coil of the speaker BL is connected to the low potential output end via the switching contact 17b. The other fader 16b changes the attenuation amount in conjunction with the fader 16aK. In each of these faders 16a and 16b, a pair of sliders are connected in common at a certain angle, and when the rotation axis is at the center position, each pair of sliders is fixed at the center with conductor portions at both ends. It is located at both ends of the resistor part, so that the attenuation of the branch paths to the two speakers is both zero. Then, when the rotation axis is rotated in one direction, the attenuation amount of one of the branch paths is increased, and the attenuation lid of the other branch path is maintained at zero. The fader 16b of the fader control 16 is controlled by the variable resistance portion 16m to balance the front and rear of the auto radio 1 driven speakers FL and BL. The above-described fader control 16 and switching unit 17 have the right channel power amplifier 151 and the speakers FR, BR. ! Although it also intervenes in the relation of:, since the 10-05-2019 2 configuration is completely the same, it is omitted in the drawing. Note that the operation axis of the fader control provided at the power amplifier output end of the right channel is linked to that of the left channel, and the fader control may be either left or part including O tone control circuits 12L and 12i + from EndPage External connection terminals 19+ and 19m led to the outside from the external connection terminals 18L and j8R led to the outside and the sliders of the volumes 13L and 13R are the second external connection terminals 21L and 21m for the カ ー ス テ レ レ, respectively. Corresponds to 22L, 22mK, both are connected at the time of stereo installation. Further, the external connection terminal 20 'derived from the sliding end of the 7 ader 16b and the external connection terminal 20b derived from the other fixed terminal of the switching contact 17b correspond to the external connection terminals 25g and 25b of the cassette 2, respectively. , Stereo attached at the time of installation. The second left and right channel reproducing heads 24L and 24m of the caster are connected to the external connection terminals 21t and 21m via the equalizer 25. The 26 and 26 wings are a left channel power amplifier and a right channel power amplifier on the car stereo side, and their input ends are connected to the external connection terminal 22L122xK. The output end (high potential m1ll) of the power amplifier 26L is connected to the external connection terminal 26 &, and the low potential side is connected to the external connection terminal 23b. The same applies to the power amplifier 26 blade, but the illustration is omitted as described above. The illustrated state is when the auto radio alone is used, and the left channel signal SL + from the tuner 11 is amplified by the power channel / '15L and then distributed to the speakers FL and BL by the 7 ader L6a. Similarly, in the right channel signal picker system, the left / right balance of the left channel can be adjusted by operating the rotation axis of the fader control 16 to move its 7 ader 16 a (the fader 16 b also moves simultaneously but is invalid in this case) It is. The volume balance of the left and right speakers is the balancer 14, and the volume adjustment of the left and the right speaker is volume 13 L, 1! Next, the case of stereo performance with four amplifiers and four speakers will be described. In this case, the power supply of the auto radio 1's TU is turned off, and instead, the second car power is turned on. Further, the contacts 17a and 171) of the switching unit 17 are switched to the side opposite to the illustrated state. This switching is automatically performed by mounting a cassette or the like. By switching, the left channel audio signal SL from the equalizer 25 and the right channel audio signal Sat are respectively led to the tone control circuits 12L and 121, and the output of the volume 13L is to the power amplifiers 15L and 26L and the output of the volume 13B is It is led to the power amplifier 151.261. In addition, the output of the amplifier 15L is led only to the speaker FL through the 7 ader 16a by the contact 17a of the switching s17, and the output of the amplifier 26L is led only to the speaker BL through the fader 16b and the contact 17m. Furthermore, the outputs of the 15 m, 26 wings are likewise led individually to the loudspeakers FR, BR. In such a 47-amp 4-speaker system, as described above, the power supply of the channel 11 is turned off when the cassette pack is inserted, and the tone control circuit 12L. The human power of 12R is the signal SL from Carster 2nd! ,island! On the contrary, when the cassette pack is discharged, 10-05-2019 3 the power of the equalizer 25 is cut off, and the tone control circuits 12b and 12a have only the signal 814rSR + from the tuner 11. In any case, one source of power A 7 ′ ′ 15 L, 15 H is turned on, and from the four speakers FL, BL, PR, BR, the tape reproduction amplified by the respective amplifiers 15 i, 15 K, 26 L, 26 wings Sound is emitted. Even at the time of this 4 amps 4 speakers, it is adjusted with the speaker FL, (FR) and BI, (BR) volume ratio (front and rear balance) fader control 16 of the company. That is, when the contacts 17m and 17b are switched to the reverse of the illustrated state, only the speaker FL side (upper side in the drawing) of the pair of sliders of the 紘 fader 16m is effective, and the pair of sliders of the fader 16b Is valid only at the contact 17a side (lower side in the figure). Then, since both effective sliders move in the same direction on the common rotation axis, if the amount of attenuation between the amplifier 15t and the speaker FL increases (decreases), the amount between the amplifier 26L and the speaker BL increases accordingly. The amount of attenuation decreases (increases). Thus, the front-rear balance is adjusted in the same manner as in the 27-amp 4-speaker system. The left, right balance and volume adjustments are exactly the same as at radio. The audio system according to the present invention described above can reduce the cost of the audio system because it does not have EndPage: 3 such as function balance, volume control, 7 ada etc. overlapping with the auto radio on the car stereo side. Because the user can always adjust the system characteristics including the front / back balance with the operation knob on the auto radio side regardless of the 27 amp 2 speaker system or 4 amplifier 4 speaker system, the operability declines due to the addition of the car stereo There is no advantage at all. In addition, when attaching an auto 2 geo and a car stereo at the same time, when an idle part is generated, the knob of the part is removed to eliminate the shakyness, but in this case the cover is exposed because the operation axis is exposed. Although extra processing such as provision is required, it is needless to say that the present invention does not take out idle parts and does not require processing. . 4. Brief Description of the Drawings The drawing is a system configuration diagram showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 ... Auto radio, 2 ... Car stereo, ANT -... receiving antenna, PL, FR, ilL, BB ... Speaker, 15L, 15 凰, 26L, 26m ... Power amplifier, 1'6 ● •• Fader control film-16 m. 16b-variable resistance unit, 17 ... switching unit, 24. 24L ... playback head, 25φ · · · Equalizer applicant Fujitsu Ten Ltd. (TL or 1 person) agent patent attorney Atsushi Aoyagi EndPage: 4 10-05-2019 4
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