CN111328001A - Car audio system based on door subwoofer - Google Patents

Abstract

The invention relates to an automobile sound system based on a door subwoofer, which comprises the door subwoofer, a midrange loudspeaker and a radio player which are respectively arranged in an automobile, wherein the front box body and the rear box body of the door subwoofer are independent closed box bodies, the front box body and the rear box body are communicated through a corner throat pipe, and the part of the corner throat pipe communicated with the front box body and the part of the corner throat pipe communicated with the rear box body are inclined; the active woofer is installed on the front box wall of the front box body, the passive woofer is accommodated in the rear box body, the passive woofer is one or paired, when one, the active woofer is installed on the front box wall or the rear box wall of the rear box body, and when paired, the active woofer corresponds to the front and the rear of the rear box body, one of each pair is installed on the box wall of the rear box body, and the other of each pair is installed on the box wall of the rear box body or the box wall of the front box body. The invention greatly improves the sound quality of the automobile sound system and greatly reduces the cost by 70 percent.

Description

Car audio system based on door subwoofer

Technical Field

The invention relates to an automobile sound system, in particular to an automobile sound system based on a door subwoofer.

Background

With the development of science and technology, the car networking and the car electronic technology are rapidly developed, and people have higher and higher requirements on the sound quality of car audio instead of sound. Current automotive sound technology, especially electro-acoustic conversion, is an old technology that has been in use for over 50 years. Particularly, the automobile bass technology needs to be innovated and improved urgently, a small-caliber loudspeaker (such as 3.5 inches) and a small-capacity box body (such as 1.3 liters) are used under the condition of narrow and small space in an automobile, and good bass can be made at low cost; meanwhile, 4.0 systems of the automobile front-mounted sound system, which accounts for 80% of the whole world, are upgraded to 4.1 home theater systems with subwoofers, and the improved electro-acoustic conversion of the middle-high 4 sound channels with small apertures and boxes is matched, so that the leap of the sound quality of the automobile sound is realized under the condition of greatly reducing the cost. At present, the bass sounds of the prior art are of the following four structures:

1. four doors bass, namely 4 woofers of about 6.5 inches are respectively arranged at the lower parts of the 4 doors, and the volumes formed by the outer wall and the inner wall steel plates of the doors are used as bass boxes; such an automobile sound system is a 4.0 system, and has the disadvantages that a real bass box body cannot be formed due to air leakage and sealing cannot be realized, and the system only can be an acoustic baffle at best, so that the bass effect is poor and the cost is high. This solution accounts for 80% of the global front-mount car stereo.

2. The integrated automobile subwoofer has one or two 4-12 inch subwoofers set on one 20-40L plastic or timber box and has the demerits of great volume, difficult setting and high cost.

3. A6.5-8 inch ultra-thin bass loudspeaker is installed on a box body which is surrounded by steel plates and has a volume of 10-20 liters on an automobile body, and the automobile body bass loudspeaker has the disadvantages of large occupied space, complex manufacturing and production process and high cost.

4. A trunk car subwoofer is characterized in that 1-3 ultrathin 8-12 inches or 8 × 12-inches subwoofers are arranged on a rear window platform separated from a car body and the trunk car, and a volume of about 500 liters of the trunk car is used as a subwoofer body, so that the trunk car subwoofer has the defects that the volume of the trunk car is too large and is about 500 liters, the requirement of a low-sound box cannot be met, the trunk car subwoofer cannot be sealed and leaked, only the function of an acoustic and electric baffle can be realized, and the cost is high.

Disclosure of Invention

In order to solve the problems of the existing automobile sound equipment, the invention aims to provide an automobile sound system based on a door subwoofer. The car audio system based on the car door subwoofer is a 4.1 or 5.1 home theater system with the subwoofer, namely, 4 small-caliber loudspeakers arranged at the upper part in a car are used for completing medium-high electro-acoustic conversion, and 1-4 left and right car door subwoofers arranged at the lower parts of 4 car doors and 1.3 liters are used for completing low-sound electro-acoustic conversion.

The purpose of the invention is realized by the following technical scheme:

the automobile door bass speaker comprises an automobile door bass speaker, a middle-high speaker and a radio player which are respectively arranged in an automobile, wherein the automobile door bass speaker comprises a front box body, a rear box body, a corner throat, an active bass speaker and a passive bass speaker, the front box body and the rear box body are independent closed box bodies, the front box body and the rear box body are communicated through the corner throat, the conduction of sound and air flow is realized, the part of the corner throat communicated with the front box body and the part of the corner throat communicated with the rear box body are inclined, namely, the corner throat between the part of the corner throat communicated with the front box body and the part of the corner throat communicated with the rear box body is provided with a corner part; an active bass loudspeaker is accommodated in the front box body and is arranged on the front box wall of the front box body; the rear box body is internally provided with one or a pair of passive woofers, when the passive woofers are one, the passive woofers are arranged on the front box wall or the rear box wall of the rear box body, when the passive woofers are arranged in pair, the passive woofers correspond to each other in a front-back mode, one passive woofer in each pair is arranged on the box wall of the rear box body, and the other passive woofer in each pair is arranged on the box wall of the rear box body or the box wall of the front box body;

wherein: the middle and high-sound loudspeaker is arranged in the closed box body or the open box body to form a middle and high-sound box, and the middle and high-sound box is arranged at each sound channel position in the automobile;

one side of the front box body, which faces the rear box body, extends outwards to form a mounting hole edge, one end of the elbow throat is communicated with the mounting hole edge, the other end of the elbow throat is communicated with the rear box body, the shape of the outer surface of the mounting hole edge is the same as that of a mounting steel plate hole of the vehicle door bass loudspeaker, and the perimeter of the mounting hole edge is smaller than that of the mounting steel plate hole of the vehicle door bass loudspeaker;

the perimeter of the rear box body is less than or equal to the perimeter of the front box body, and the outer edge of the rear box body is coplanar with the outer edge of the front box body or protrudes out of the outer edge of the front box body;

the sum of the diaphragm areas of the passive woofers is larger than the sum of the diaphragm areas of the active woofers;

the mounting plane of the passive woofer is parallel to or coplanar with the mounting plane of the active woofer;

when the passive woofers are arranged in pairs, the box walls of the two passive woofers in each pair are the same, namely the two passive woofers in each pair are respectively arranged on the front box wall and the rear box wall of the rear box body; or one passive woofer in each pair is arranged on the wall of the front box body where the active woofer is positioned, and the other passive woofer in each pair is arranged on the wall of the rear box body;

when one passive bass loudspeaker is arranged, the passive bass loudspeaker is arranged on the front box wall of the rear box body close to the front box body;

the number of the vehicle door subwoofers is one to four, and the vehicle door subwoofers are respectively arranged at the lower parts of the vehicle doors of the vehicle; the middle and high-sound loudspeakers are at least two and are respectively arranged on the doors in the automobile, or respectively arranged on the left A column and the right A column, or respectively arranged at the left end and the right end of the front instrument desk, or respectively arranged at the left end and the right end of the rear window platform; the radio player is arranged in the middle of the front instrument desk;

when the number of the door subwoofers is one, the door subwoofers are arranged at the lower part of the right front door of the automobile; when the middle and high-sound loudspeakers are arranged on the vehicle door, the middle and high-sound loudspeakers are respectively arranged on the upper part of the vehicle door.

The invention has the advantages and positive effects that:

1. the 4.1 home theater system is used for replacing a 4.0 system which accounts for 80% of the front installation of the automobile sound equipment in the prior art, so that the cost of the loudspeaker system of the economic automobile is reduced by 70% under the condition of greatly improving the sound quality of the whole automobile; meanwhile, the cost of the radio player is reduced, and a large aluminum radiating fin is abandoned.

2. The front left and right sound channels and the rear left and right sound channels of the invention are installed on the box body by the 1.25-3 inches middle and high sound speakers to form the middle and high sound box which is then arranged on the upper part of the vehicle, such as the upper part of the vehicle door, the left and right A columns, the left and right ends of the front instrument desk finish the electro-acoustic conversion, and the middle sound sounding is the advantage, thus overcoming the defect that the middle sound of the traditional 4.0 system is finished by the 6.5 inches left and right low sound speakers to finish the electro-acoustic conversion, but the middle sound of the 6.5 inches left and right low sound speakers is not good, because the 6.5 inches left and right low sound speakers have good low sound and poor middle sound. And because the mediant is sent out by the 6.5 inch woofer located under the foot, and the mediant has very strong directionality already, so cause the sound image to fix a position badly, just like singer sings under the foot of passenger, the sound field characteristic is not good. The middle sound of the invention is emitted by the middle and high sound box positioned at the upper part in the vehicle, so the sound image is well positioned and the sound field characteristic is good.

3. The middle and high pitch loudspeaker can well emit 20KHZ high pitch, and overcomes the defect that no high pitch exists in the back row for a 4 bass loudspeaker and 2 high pitch loudspeaker system in the prior art; the 4-bass loudspeaker system without the high pitch loudspeaker overcomes the defect that the front row and the rear row have no high pitch.

4. The vehicle door subwoofer is designed into a unique front and rear box bodies and a corner throat h-shaped structure, the total volume is only about 1.3 liters, the vehicle door subwoofer with the traditional technology can be conveniently and directly replaced by a vehicle door bass loudspeaker with about 6.5 inches, and the vehicle door subwoofer can be well suitable for the complex structures of vehicle doors of different vehicle types without interfering with other parts in the vehicle doors such as lifting glass and the like.

5. The invention utilizes the resonance of the corresponding passive loudspeaker, the action of the sound and air flow air spring in the bass box body, the secondary bass lifting of the internal volume of the outer car door of the bass box body and the bass enhancing effect of the foot cabin of passengers to obtain perfect and shocked pure bass.

6. The invention adopts the corresponding passive loudspeaker arrangement, the vibrating diaphragms of the pair of passive bass loudspeakers have opposite vibration directions and equal vibration amplitudes during electro-acoustic conversion, the vibration force is offset, and the mechanical vibration of the box body is greatly reduced, so that the vibration of the vehicle door is reduced, and the service life and the reliability of the vehicle door are improved.

7. The vehicle door subwoofer adopts the 3.5-inch small-caliber subwoofer, and the bass effect of the vehicle door subwoofer is better than that of the 6.5-inch subwoofer arranged at the lower part of 4 vehicle doors in the prior art by only using one vehicle door subwoofer, and the cost is reduced by 75 percent.

8. The invention reduces the occupied space of the automobile bass loudspeaker in the automobile and increases the available space in the carriage.

9. The invention reduces the parts of the whole vehicle and reduces the difficulty of the design and manufacturing process of the whole vehicle.

10. The vehicle door subwoofer is an integrated plastic box body, and the medium-high speakers are arranged in the independent plastic box body and are integrated into a whole, so that the speaker units are protected additionally, the service life of the speakers can be prolonged, and the vehicle door subwoofer is waterproof and is not easy to damage.

11. The invention adopts the door subwoofer as the active subwoofer, and is internally provided with the D-type digital power amplifier, the audio signal and the power supply of the active subwoofer are both taken from the door, and are taken by connecting the plug socket which is additionally arranged at the back and is connected with the plug socket with the cable between the original door glass lifting control plug socket of the automobile, the wire breaking and the welding are not needed, the after-loading upgrading of the automobile audio is completed under the condition that no additional cable, amplifier, sound box and the like are arranged in the automobile, the original shape of the automobile is kept, the DIY can be completed by the owner, and the cost of the automobile audio after being completely loaded is very low.

12. The invention reduces the weight of the automobile loudspeaker system by 70 percent, and realizes the reduction of the weight of the automobile door and the weight of the whole automobile.

13. The 4.1 power amplifier of the radio player adopts a D-type digital power amplifier chip with the conversion efficiency of more than 90 percent, so that the power consumption of the automobile sound system is reduced by 70 percent, and the radio player is more suitable for new energy automobiles.

Drawings

FIG. 1A is a schematic view of a vehicle-mounted structure according to an embodiment of the present invention;

FIG. 1B is a cross-sectional view of a door subwoofer according to an embodiment of the present invention;

FIG. 1C is a cross-sectional view of a door subwoofer according to an embodiment of the present invention;

fig. 1D is a structural sectional view of a high-pitch sound box according to an embodiment of the present invention;

FIG. 1E is a bottom view of FIG. 1D;

FIG. 2A is a schematic view of a second embodiment of the present invention installed in a vehicle;

FIG. 2B is a cross-sectional view of a door subwoofer according to an embodiment of the present invention;

FIG. 2C is a perspective view of a subwoofer according to an embodiment of the present invention;

fig. 2D is a sectional view of the high sound box according to the second embodiment of the present invention;

FIG. 2E is a bottom view of FIG. 2D;

FIG. 3A is a schematic view of a third embodiment of the present invention installed in a vehicle;

FIG. 3B is a cross-sectional view of a third door subwoofer according to an embodiment of the present invention;

FIG. 3C is a cross-sectional view of a three-door subwoofer according to an embodiment of the present invention;

fig. 3D is a sectional view of a high-pitch speaker according to a third embodiment of the present invention;

FIG. 3E is a bottom view of FIG. 3D;

FIG. 4A is a schematic view of a structure mounted on an automobile according to a fourth embodiment of the present invention;

FIG. 4B is a cross-sectional view of a four-door subwoofer according to an embodiment of the present invention;

FIG. 4C is a cross-sectional view of a four-door subwoofer according to an embodiment of the present invention;

fig. 4D is a structural sectional view of a high sound box in the fourth embodiment of the present invention;

FIG. 4E is a bottom view of FIG. 4D;

wherein: the automobile loudspeaker comprises an automobile 1, a door subwoofer 2, a middle and high-pitch sound box 3, a radio player 4, a front box 5, a rear box 6, a corner throat 7, an active loudspeaker 8, a passive loudspeaker 9, a mounting hole edge 10, a middle and high-pitch loudspeaker 11 and a screw hole 12.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The invention comprises a door subwoofer 2, a midrange loudspeaker 11 and a radio player 4 which are respectively arranged in an automobile 1, wherein one to four door subwoofers 2 are arranged at the lower part of the door of the automobile 1; when the door subwoofer 2 is one, it is installed at the lower portion of the right front door of the automobile 1. The middle and high-sound loudspeakers 11 are at least two and are respectively arranged on the doors in the automobile 1, or respectively arranged on the left A column and the right A column, or respectively arranged at the left end and the right end of the front instrument desk, or respectively arranged at the left end and the right end of the rear window platform; the middle tweeter 11 is disposed at the upper part of the door as much as possible when the door is mounted. The radio player 4 is arranged in the middle of the front instrument desk.

The radio player 4 is disposed in the instrument desk of the automobile 1. When the invention is used for the front-mounted automobile, the radio player 4 outputs 4.1 audio full-frequency power, namely, the front left and right sound channels and the rear left and right sound channels, and is additionally provided with a subwoofer output. The 4.1 power amplifier chip of the radio player 4 adopts a D-type digital power amplifier chip, the conversion efficiency is high (more than 90 percent), but the conversion efficiency of the current general A/B-type power amplifier is less than 30 percent, and the cost is lower than that of the A/B-type power amplifier; meanwhile, large aluminum radiating fins are abandoned, and the cost of the vehicle machine is further reduced. The front left and right sound channel outputs and the rear left and right sound channel outputs of the radio player 4 are respectively connected with the front left and right sound channel middle-high speakers 11 and the rear left and right sound channel middle-high speakers 11; the other path of subwoofer power output of the radio player 4 is connected with the door subwoofer 2. When the invention is used for the rear loading of the automobile, the original radio player 4 of the original automobile is still continuously used, and the system is generally a 4.0 system, namely, only 4 paths of full-frequency power output of a front left channel, a front right channel, a rear left channel and a rear right channel are available; the front left, right, back left and right sound channel outputs are respectively connected with a front left loudspeaker 11, a back left loudspeaker 11 and a back right middle and high sound loudspeaker 11, then 1-4 door active subwoofers are additionally arranged, the active subwoofers are respectively provided with a subwoofer power amplifier board arranged in a box body of the door subwoofer 2, and a power amplifier chip of the subwoofer power amplifier board is a D-class digital power amplifier integrated circuit; the direct current power supply of the power amplifier board is taken from a connector of a control circuit of a window glass lifting and door opening and closing in a door; the method is obtained by adding a patch plug with a wire and a socket which are connected in series between the plug and the socket of the original vehicle door glass lifting control bus, so that the purpose of quickly realizing the method without wire breaking and welding is achieved; namely, the plug of the original vehicle is pulled out from the socket, and the plug and the socket with a transitional connection wiring harness are additionally manufactured to be respectively connected with the plug and the socket of the original vehicle, so that the transitional connection wiring harness is connected in series between the original socket and the plug; the plug and socket connecting wires of the transitional connecting wire harness correspond to each other one by one, for example, the 5 th pin of the socket is connected with the 5 th pin of the plug; when the plug or the socket of the transitional connection wiring harness is used as a wire, the ground wire pin and the +12V pin are respectively used as one more connecting wire, and the direct current power supply of the active car door subwoofer is formed. The input audio signal of the power amplifier board is taken from 4 channels of full-frequency audio power output of the original radio player 4 connected to the high-level plug of each vehicle door connected with the 6.5 inch woofer of the original vehicle.

The middle and high-pitch loudspeaker 11 of the present invention is preferably installed in a cabinet to form a middle and high-pitch sound box 3, and the middle and high-pitch sound box 3 is installed at the upper parts of four doors in the automobile 1, or installed on the left a pillar and the right a pillar, or installed at the left and right ends of the front instrument desk, or installed at the left and right ends of the rear window platform, respectively. The mid-high sound box 3 is mounted as close as possible to the ear plane of the passenger. This box may be a closed box or an open box.

The door subwoofer 2 is installed at the lower part of the four doors, and when one door is installed, it is installed at the lower part of the front right door, so that the main driving position has the best bass effect, and when two doors are installed, it is installed at the lower parts of the front left and right doors, respectively, so that the bass effect is good because they are close to the foot compartments of the main driver and the assistant driver, respectively.

The vehicle door subwoofer comprises a front box body 5, a rear box body 6, a corner throat 7, an active subwoofer 8 and a passive subwoofer 9, wherein the front box body 5 and the rear box body 6 are independent closed box bodies, the front box body 5 and the rear box body 6 are communicated through the corner throat 7 to realize the conduction of sound and air flow, the part of the corner throat 7 communicated with the front box body 5 and the part of the corner throat 7 communicated with the rear box body 6 are inclined, namely, the corner throat 7 between the part of the corner throat 7 communicated with the front box body 5 and the part of the corner throat 7 communicated with the rear box body 6 is provided with a corner part. An active woofer 8 is housed within the front box 5, the active woofer 8 being mounted on a front box wall of the front box 5. A passive woofer 9 is arranged in the rear box 6, one or a pair of passive woofers 9 is arranged, and when one passive woofer 9 is arranged, the passive woofer is arranged on the front box wall or the rear box wall of the rear box 6; when the passive woofers 9 are arranged in pairs, the front and the back correspond to each other, one passive woofer 9 in each pair is mounted on the wall of the rear box body 6, and the other passive woofer 9 in each pair is mounted on the wall of the rear box body 6 or the wall of the front box body 5. A plurality of screw holes 12 are uniformly arranged on the outer edge of the front box body 5 along the circumferential direction and are used for fixing the automobile door subwoofer on an automobile door.

One side of the front box body 5 facing the rear box body 6 extends outwards to form a mounting hole edge 10, one end of the elbow throat pipe 7 is communicated with the mounting hole edge 10, and the other end of the elbow throat pipe is communicated with the rear box body 6. The shape of the outer surface of the mounting hole edge 10 is the same as the shape of the automobile door woofer mounting steel plate hole and is smaller than the automobile door woofer mounting steel plate hole.

The perimeter of the rear box 6 is less than or equal to the perimeter of the front box 5, and the outer edge of the rear box 6 is coplanar with the outer edge of the front box 5 or protrudes from the outer edge of the front box 5.

The mounting plane of the passive woofer 6 is parallel or coplanar with the mounting plane of the active woofer 5. The sum of the diaphragm areas of the passive woofers 6 is larger than the sum of all the diaphragm areas of the active woofers 5.

When the active bass loudspeaker 8 is 3.5 inches, the sum of the volumes of the front box body 5, the rear box body 6 and the elbow throat 7 is about 1.3 liters, and the volume is in direct proportion to the diaphragm area of the active bass loudspeaker 8. Since the woofers of the conventional car 1 are typically about 6.5 inches, the four doors are tailored to the installation of the four 6.5 inches woofers. Although the volume of the 1.3 liter subwoofer is very small, the direct replacement of the original 6.5 inches woofer by the door subwoofer is still difficult to realize without changing the structure of the door. Therefore, the box body of the automobile door subwoofer 1 is divided into a front box body 5 and a rear box body 6, and the front box body and the rear box body realize sound airflow circulation through the elbow throat pipe 7; the whole vehicle door bass loudspeaker 2 is in a letter 'h' shape, the front box body 5 is positioned on the outer side of the original vehicle door 6.5 inch bass loudspeaker installation steel plate, and the rear box body 6 is positioned on the inner side of the original vehicle door 6.5 inch bass loudspeaker installation steel plate, so that the vehicle door bass loudspeaker 2 can be designed skillfully according to different vehicle door structures to realize direct replacement.

Example one

As shown in fig. 1A to 1D, in an automobile 1 of this embodiment, door subwoofers 2, a midrange woofer 11 and a radio player 4 are provided, one to four door subwoofers 2 may be provided in one automobile 1, the door subwoofers are respectively provided at lower portions of four doors, and directly replace a 6.5 inch or so woofer of an automobile door in the conventional technology of the automobile, and a 6.5 inch woofer scheme of the four doors accounts for 80% of a global front loading market. This embodiment is a door subwoofer 2 which is disposed at the lower part of the front right door because the bass effect obtained in the main driving is the best. In a car 1, four middle tweeters 11 are usually provided, i.e., a front left and right channel middle tweeter and a rear left and right channel middle tweeter, so as to form a 4.1 system, or a middle tweeter may be added to this as a center tweeter, so as to form a 5.1 system. The mid-high range speaker is a full range speaker, but its main task is mid-high range, with bass accomplished by door subwoofer 2. The middle and high-sound loudspeaker is a full-frequency loudspeaker of 1.25 inches to 4 inches, and one sound channel can be composed of a full-frequency loudspeaker unit or a full-frequency loudspeaker unit and a high-sound loudspeaker unit; the middle and high sound loudspeaker 11 of the present embodiment is four 1.5 inch full frequency loudspeaker units, and all installed in the respective box body to become the middle and high sound box 3; the box body can be a closed box body or an open box body, the four middle and high pitch sound boxes 3 are respectively arranged at the upper part of the automobile 1, namely close to the ear plane of a passenger as much as possible, and can be arranged at the upper parts of four automobile doors, or a left A column and a right A column, or the left side and the right side of a front instrument desk, or the left side and the right side of a rear window platform; the present embodiment is provided at the upper portions of four doors. The radio player 4 is also called a car machine, is arranged in the middle of an instrument desk in the car 1, and can not only listen to radio station broadcasting, but also play CD, USB, AUX, Bluetooth songs, videos and navigation. The radio player generally has a 4.0 audio power output, i.e., a front left and right audio channel and a rear left and right audio channel, which are connected to front left and right and rear left and right mid-high speakers 11, respectively. When in connection, each sound channel can be connected with a large-capacity non-polar capacitor in series; this embodiment is a 100 microfarad non-polar capacitor. Therefore, low-frequency power is prevented from entering the middle and high-frequency loudspeaker 11, electroacoustic conversion distortion can be reduced, middle and high frequencies are purer, and the bearing power of the middle and high-frequency loudspeaker 11 is improved, tests show that the bearing power can be improved by more than 8 times, namely the bearing power of a full-frequency loudspeaker with the common power of 2W can be more than 16W after the full-frequency loudspeaker is connected with a 100 microfarad capacitor in series. The radio player 4 can also be 4.1 audio power output, namely on the basis of the front left channel, the front right channel, the rear left channel and the rear right channel, a path of subwoofer power output is output, the output power of the path of subwoofer is greater than the sum of the output power of the front left channel, the output power of the front right channel, the output power of the rear left channel and the output power of the rear right channel, and the output of the path of subwoofer is connected with a vehicle door subwoofer; the radio player 4 of this embodiment is a 4.1 audio power output. Of course, an independent power amplifier can be used, that is, the radio player 4 outputs audio small signals, the small signals are input into the 4.1 audio independent power amplifier, and then the front left and right sound channels, the rear left and right sound channels and the car door subwoofer are driven by the independent power amplifier. The 4.1 audio power amplifier of the radio player 4 can be A/B class amplifier, can also be D class digital power amplifier, the conversion efficiency of D class digital power amplifier is above 90%, and the conversion efficiency of A/B class power amplifier is about 30%, therefore can reduce the power consumption by 70%, this embodiment uses D class digital power amplifier, this D class digital power amplifier is generally a chip, can adopt TPA3110 and TPA3116 of TI company, can also use integrated circuits such as AD52068 and AD52580, AD52090 of Taiwan company, etc.; therefore, the cost of the vehicle machine can be reduced, the process is simplified, and large aluminum radiating fins are eliminated.

The door subwoofer 2 of this embodiment includes preceding box 5, back box 6, corner choke 7, initiative woofer 8 and passive woofer 9, and preceding box 5 and back box 6 realize the acoustic airflow intercommunication through corner choke 7. The rear box wall of the front box body 5 extends outwards to form a mounting hole edge 10; the front box 6 and the rear box 7 of this embodiment are both cylindrical in shape, the mounting holes along 10 on the front box 6 are also cylindrical, the diameter of the front box 6 is 170mm, the diameter of the mounting holes along 10 is 135mm, it is noted that the shape of the mounting holes along 10 should be the same as the shape of the original 6.5 inch woofer mounting steel plate holes, and the perimeter of the mounting holes along 10 is smaller than the perimeter of the original 6.5 inch woofer mounting steel plate holes. In addition, the front box 5 cannot interfere with the large inner decoration plate of the carriage door in the diameter direction and the height direction. The active woofer 8 is arranged on the front box wall of the front box body 5, and the active woofer 8 can be circular or elliptical; in this embodiment, the diameter of the circular woofer is 3.5 inches, and when the size is larger than 3.5 inches (for example, more than 4 inches), the volume of the box body of 1.3 liters cannot meet the requirement, so that the bass effect is not improved, the cost is increased, and the bass effect is not good when the size is smaller than 3.5 inches (for example, 3 inches) or less.

The rear box 6 is prevented from interfering with window glass, so that the box volume is ensured on one hand, and the rear box does not interfere with the window glass on the other hand. And a distance of not less than 8mm is reserved between the rear box body 6 and the vehicle window lifting glass when the glass completely falls down. The rear box 6 of the present embodiment is partially cylindrical in shape, and the radius thereof is equal to or smaller than the radius of the front box 6. The elbow throat 7 is used for connecting the front box 5 and the rear box 6 and is a through pipe, so that the volume is fully increased on one hand, and the strength of the whole subwoofer box is ensured on the other hand. The cross section area of the elbow throat 7 is more than 1000MM²The elbow throat 7 of the present embodiment is a half-moon shaped tube, that is, the end of the elbow throat 7 of the present embodiment communicating with the front box 5 is a straight tube, and the axial cross section of the other end communicating with the rear box 6 is an inclined plane; the cross-sectional area of the elbow throat 7 of the present embodiment is 5000MM². This implementationThe volume sum of the front case 5, the rear case 6 and the elbow throat 7 of the example was 1.3 liters.

The passive woofer 9 may be one, or may be provided in pairs. The passive bass loudspeaker is also called a bass radiator, which does not have a magnet, a magnetic circuit and a voice coil, and only has a vibrating diaphragm and a supporting mechanism thereof. It may be circular or oval or rectangular. The shape may be flat or conical. The sum of the diaphragm areas of the passive woofers 9 is 1.5 times larger than that of the active woofer 8, the passive woofers 9 are arranged on the wall of the front box 5 or the rear box 6, and the installation planes of the passive woofers 9 and the active woofer 8 are coplanar and parallel. This embodiment employs a pair of circular flat passive woofers of 88mm diameter. Which are mounted in tandem on the front and rear walls of the rear cabinet 6, with the mounting planes of the pair of passive woofers 6 and the active woofer 8 being parallel. The outer edge of the rear box 6 is coplanar with the outer edge of the front box 5 in this embodiment.

The door subwoofer 2 can be made of plastic, metal, etc., and in this embodiment, is manufactured by a mold-open injection molding method. Firstly, designing the appearance and the structure according to the structure of an original automobile door to be installed and the design principle explained in the embodiment; then a cabinet mold is made, the cabinet is made by ABS injection molding, and then the active woofer 8 and the passive woofer 9 are mounted on the cabinet.

Example two

As shown in fig. 2A to 2D, the present embodiment is different from the first embodiment in that: the radio player 4 of this embodiment is 4.0 output, it is the original car machine of loading of the original traditional technology, the door subwoofer 2 is two, they are installed in the front left, right door inferior part separately, and replace these two 6.5 inch woofers directly. The two door subwoofers 2 are active subwoofers, i.e. subwoofers power amplification boards are arranged in the box body of the door subwoofers 2. The subwoofer power amplifier board is a D-type digital power amplifier and is provided with a subwoofer electronic low-pass filter circuit. The audio signals of the two active door subwoofers 2 are respectively from the front left and front right power outputs of the radio player 4 to the connecting plugs of the front left and front right doors, and the two active door subwoofers direct current 12V power supplies are from the respective side doors and are obtained through a transitional connecting wire harness connected between the plug seats of the door window glass lifting and door switch bus in series. The embodiment is very suitable for upgrading the rear-mounted sound equipment of the automobile; in addition, a pair of passive woofers 9 of this embodiment, one of which is mounted on the rear wall of the rear box 6 and the other of which is mounted on the front wall of the front box 5, are coplanar with the mounting plane of the active woofer 8. Therefore, the inner diameter of the end of the elbow throat 7 communicated with the front box body 5 is larger than that of the first embodiment; further, the axial cross section of the other end of the neck pipe 7 of the present embodiment, which communicates with the rear case 6, is a concave arc surface. The rest is the same as the first embodiment.

EXAMPLE III

As shown in fig. 3A to 3D, the present embodiment is different from the first embodiment in that: the middle and high-pitch loudspeaker 11 of the embodiment is not installed in the box body, but is directly arranged in the automobile 1, and the passive low-pitch loudspeaker 9 is one, has the diameter of 120mm and is arranged on the front box wall of the rear box body 6; further, the axial cross section of the other end of the neck pipe 7 of the present embodiment, which communicates with the rear case 6, is a concave arc surface. The rest is the same as the first embodiment.

Example four

As shown in fig. 4A to 4D, the present embodiment is different from the first embodiment in that: the radio player 4 of this embodiment is 5.1, namely add one way of middle channel output on the basis of original 4.1, the middle and high-pitched sound box 3 is five, three of them are 1.5 inch full frequency loudspeakers, two are set up in the front left, upper portion of right car door, one is set up in the middle part of the front instrument desk as the middle loudspeaker; the other two loudspeakers are 3 inches full-frequency loudspeakers which are respectively arranged at the left end and the right end of the rear window platform; furthermore, the length of the elbow throat 4 of the embodiment is larger than that of the elbow throat 4 of the first embodiment, one end communicated with the front box 5 is a straight pipe, the other end communicated with the rear box 6 is a bent pipe, and the axial center line of the part of the elbow throat 7 communicated with the front box 5 is vertical to the axial center line of the part communicated with the rear box 6, so that the rear box 6 can be more conveniently and flexibly arranged at any position in the vehicle door, and the 5.1 home theater system is formed in the vehicle. The outer edge of the rear case 6 of this embodiment protrudes beyond the outer edge of the front case 5. The rest is the same as the first embodiment.

The working principle of the invention is as follows:

when the radio player 4 in the car 1 works, 4.1 or 4.0 audio power signals are output, the front left, right and back left and right four-channel full-frequency audio power is applied to the middle-high sound speakers 11 of the front left and right sound channels and the back left and right sound channels respectively, and the four middle-high sound speakers 11 complete middle-high sound electro-acoustic conversion; the diaphragm is light due to small caliber, the voice coil is light, and the electro-acoustic conversion of middle and high tones is very good completed, so that the defect that the 6.5 inch bass loudspeaker of the four-bass and two-high tone automobile loudspeaker system in the prior art cannot generate middle tone well is overcome, and the defect that no high tone exists in the rear row is overcome; because the four middle-high pitch loudspeakers are arranged at the upper part in the automobile and are closer to the ear listening plane, the defect that the middle pitch of the automobile loudspeaker in the traditional technology is emitted by the 6.5-inch low pitch loudspeaker positioned under feet, like a singer squats under feet of passengers to sing, is overcome, the sound image is well positioned, the on-site feeling in the automobile is stronger, and the sound field is wider. Thus, the medium and high sound with clearness, small distortion and good sound image positioning can be obtained.

When subwoofer power (below 250 HZ) is applied to the active woofer 8, the diaphragm of the active woofer 8 vibrates to generate bass sound, completing the electro-acoustic conversion of bass sound. When the vibrating diaphragm of the active bass loudspeaker 8 vibrates towards the front box body 5, the air in the front box body 5 is compressed, so that the air pressure in the front box body 5 is greater than the pressure in the elbow throat pipe 7 and the rear box body 6, and the air in the front box body 5 flows towards the rear box body 6 through the elbow throat pipe 7. At this time, the pressure intensity of the front and the back boxes 5 and 6 is larger than the pressure intensity of the listening space, and the vibrating diaphragms of the passive bass loudspeakers 9 are stressed to vibrate towards the outer directions of the boxes respectively; when the active woofer 8 vibrates towards the outside of the front box 5, the pressure in the front box 5 is reduced, the air in the rear box 6 flows into the front box 5 through the elbow throat 7, and the flow generates the action of an aeroacoustic spring. Meanwhile, the sum of the area of all the active vibrating membranes and the area of the passive vibrating membranes is increased by nearly 2 times, so that bass sound waves are enhanced. Meanwhile, the bass sound wave is not radiated to the listening space in diameter, but is firstly transmitted to the interior of the carriage door, under the action of the internal volume space of the carriage door, the bass sound wave is further improved, the improved bass sound wave is transmitted to the foot cabin of the passenger, and the foot cabin of about 50 liters enables the bass sound wave to be improved. The common result of the multiple functions enables the bass loudspeaker with the volume of 1.3 liters and the volume of 3.5 inches to obtain the powerful, pure and shocking bass; and the unique structural design of the front box body, the rear box body and the crank throat of the 1.3L small box body ensures that the bass loudspeaker at 6.5 inches at the lower part of the original vehicle door can be directly replaced without changing the original vehicle door structure of the traditional vehicle, and the bass effect of the vehicle door bass loudspeaker is better than that of the bass loudspeaker at 6.5 inches of the vehicle doors in the four traditional technologies, and the cost is 75 percent less.

In a word, under the condition that the cost is greatly reduced compared with the traditional automobile sound technology, the home theater system with the subwoofer is arranged in the automobile, so that the tone quality of the automobile sound system is greatly improved.

Claims (10)

1. The utility model provides an automobile sound system based on door subwoofer which characterized in that: comprises a door subwoofer (2), a midrange loudspeaker (11) and a radio player (4) which are respectively arranged in an automobile (1), wherein the vehicle door subwoofer (2) comprises a front box body (5), a rear box body (6), a corner throat (7), an active woofer (8) and a passive woofer (9), wherein the front box body (5) and the rear box body (6) are independent closed box bodies, the front box body (5) is communicated with the rear box body (6) through the elbow throat pipe (7) to realize the conduction of sound and air flow, the part of the elbow throat (7) communicated with the front box body (5) and the part of the elbow throat (7) communicated with the rear box body (6) are inclined, namely, a bent part is arranged on the corner throat pipe (7) between the part of the corner throat pipe (7) communicated with the front box body (5) and the part of the corner throat pipe (7) communicated with the rear box body (6); an active woofer (8) is arranged in the front box body (5), and the active woofer (8) is arranged on the front box wall of the front box body (5); passive woofers (9) are arranged in the rear box body (6), the passive woofers (9) are arranged in one or in pairs, when the passive woofers (9) are arranged in one, the passive woofers are arranged on the front box wall or the rear box wall of the rear box body (6), when the passive woofers (9) are arranged in pairs, the passive woofers (9) in each pair are arranged on the box wall of the rear box body (6) in a front-back corresponding mode, and the other passive woofer (9) in each pair is arranged on the box wall of the rear box body (6) or the box wall of the front box body (5).

2. The door subwoofer-based automotive audio system of claim 1, wherein: the middle and high sound loudspeaker (11) is arranged in the closed box body or the open box body to form a middle and high sound box (3), and the middle and high sound box (3) is arranged at each sound channel position in the automobile (1).

3. The door subwoofer-based automotive audio system of claim 1, wherein: preceding box (5) are outwards extended, are formed the installation hole and are followed (10) towards one side of back box (6), the one end and this installation hole of corner choke (7) are linked together along (10), the other end with back box (6) intercommunication, the surface shape of installation hole edge (10) is the same with door woofer installation steel sheet hole's shape, and this installation hole is less than the girth of door woofer installation steel sheet hole along the girth of (10).

4. The door subwoofer-based automotive audio system of claim 1, wherein: the perimeter of the rear box body (6) is less than or equal to the perimeter of the front box body (5), and the outer edge of the rear box body (6) is coplanar with the outer edge of the front box body (5) or protrudes out of the outer edge of the front box body (5).

5. The door subwoofer-based automotive audio system of claim 1, wherein: the sum of the diaphragm areas of the passive woofers (9) is larger than that of the diaphragm areas of the active woofers (8).

6. The door subwoofer-based automotive audio system of claim 1, wherein: the mounting plane of the passive woofer (9) is parallel or coplanar with the mounting plane of the active woofer (8).

7. The door subwoofer-based automotive audio system of claim 1, wherein: when the passive woofers (9) are arranged in pairs, the box walls of the two passive woofers (9) in each pair are the same, namely the two passive woofers (9) in each pair are respectively arranged on the front box wall and the rear box wall of the rear box body (9); or one passive woofer (9) of each pair is mounted on the wall of the front box (5) where the active woofer (8) is located, and the other passive woofer (9) of each pair is mounted on the wall of the rear box (6).

8. The door subwoofer-based automotive audio system of claim 1, wherein: and when one passive bass loudspeaker (9) is arranged, the passive bass loudspeaker is arranged on the front box wall of the rear box body (6) close to the front box body (5).

9. The door subwoofer-based automotive audio system of claim 1, wherein: the number of the door subwoofers (2) is one to four, and the door subwoofers are respectively arranged at the lower parts of the doors of the automobile (1); the middle and high-sound loudspeakers (11) are at least two and are respectively arranged on the doors in the automobile (1), or respectively arranged on the left A column and the right A column, or respectively arranged at the left end and the right end of the front instrument desk, or respectively arranged at the left end and the right end of the rear window platform; the radio player (4) is arranged in the middle of the front instrument desk.

10. The door subwoofer-based automotive audio system of claim 9, wherein: when the number of the door subwoofers (2) is one, the door subwoofers are arranged at the lower part of the right front door of the automobile (1); when the middle and high sound speakers (11) are arranged on the vehicle door, the middle and high sound speakers are respectively arranged on the upper part of the vehicle door.

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