WO2020119586A1

WO2020119586A1 - Vehicle door subwoofer

Info

Publication number: WO2020119586A1
Application number: PCT/CN2019/123498
Authority: WO
Inventors: 郑晗; 郑全录; 宋军辉
Original assignee: 深圳纽斯声学系统有限公司
Priority date: 2018-12-14
Filing date: 2019-12-06
Publication date: 2020-06-18
Also published as: CN111327992A

Abstract

The present invention relates to vehicle audio systems, specifically, a vehicle door subwoofer, of which front and rear housings are discrete sealed housings, the front housing and the rear housing are in communication with each other via a curved-neck throat pipe to implement the conduction of acoustic airflow, and, the part of the curved-neck throat pipe in communication with the front housing and the part of the curved-neck throat pipe in communication with the rear housing are tilted relative to each other. An active bass speaker is mounted on a front housing wall of the front housing. A passive bass speaker is accommodated within the rear housing. The passive bass speaker is provided either discretely or as a pair. When the passive bass speaker is discrete, same is mounted on a front housing wall or a rear housing wall of the rear housing. When the passive bass speaker is paired, the pair corresponds front-to-rear, one in the pair is mounted on the housing wall of the rear housing, and the other is mounted on the housing wall of the rear housing or mounted on the housing wall of the front housing. The present invention significantly reduces the footprint of the subwoofer, thus allowing easy and direct replacement of an original vehicle door 6.5-inch bass speaker without any modification to the original structure of a vehicle door.

Description

Car door subwoofer

Technical field

The invention relates to a car audio system, specifically a car door subwoofer.

Background technique

With the development of automotive electronic technology and the maturity of AI (artificial intelligence), people have higher and higher requirements for the sound quality of car audio and lower and lower cost requirements. At present, the automobile bass produced by the existing technology has the following four structures:

1. Four-door bass, that is, four 6.5-inch woofers are respectively arranged at the lower part of the four compartment doors, and the volume formed by the outer wall steel plate and inner wall of the door is used as the subwoofer body; the disadvantage is that the air leakage cannot form the subwoofer body At best, it can only be an acoustic baffle, with poor bass sound quality and high cost.

2. Integrated car subwoofer, one or two 4-inch to 12-inch woofers are installed on a box made of plastic or wood with a volume of 20 to 40 liters; the disadvantage is that the volume is large and the car It is difficult to set up inside and high cost.

3. Body car subwoofer, install a 6.5-inch to 8-inch ultra-thin woofer on a 10-liter to 15-liter box surrounded by steel plates on the car body; its disadvantage is that it takes up a lot of space in the car body. The production process is complicated and the cost is high.

4. Car trunk subwoofer in the trunk, 1 to 3 8-inch to 12-inch ultra-thin woofers are installed on the rear window platform separated from the trunk in the compartment, and the volume of the trunk is about 500 liters to make the subwoofer The disadvantage is that the volume of the trunk is about 500 liters. The volume is too large to meet the requirements of the subwoofer; and the air leakage can not be sealed, which can only play the role of an acoustic baffle and high cost.

Summary of the invention

In order to solve the above-mentioned problems of the existing car bass electroacoustic conversion, the object of the present invention is to provide a car door subwoofer. The car subwoofer is small (only about 1.3 liters), and it can directly replace the traditional car door woofer. The original door structure can be directly installed at the lower part of each door without any change. The bass effect is better than that of four traditional car door 6.5-inch woofer speakers, and the cost is reduced by 75%.

The purpose of the present invention is achieved by the following technical solutions:

The invention includes a front box body, a rear box body, a crooked neck throat pipe, an active woofer and a passive woofer, wherein the front box body and the rear box body are independent sealed boxes, between the front box body and the rear box body Through the communication of the crutch throat pipe, the conduction of the acoustic airflow is achieved. The part where the crutch throat pipe communicates with the front box and the part where the crutch throat pipe communicates with the rear box are inclined, namely There is a turning part on the turning neck throat between the part where the turning neck throat communicates with the front box body and the part where the turning neck throat pipe communicates with the rear box body; An active woofer is installed on the front wall of the front box; a passive woofer is arranged in the rear box, and the passive woofer is arranged in one or in pairs, when the passive woofer is one , Installed on the front box wall or the rear box wall of the rear box, when the passive woofers are arranged in pairs, they correspond to the front and rear, one passive woofer in each pair is installed on the rear box On the box wall, the other passive woofer in each pair is installed on the box wall of the rear box or on the box wall of the front box;

Wherein: the front box body extends outward toward a side of the rear box body to form a mounting hole edge, one end of the crooked neck throat communicates with the mounting hole edge, and the other end communicates with the rear box body;

The shape of the outer surface along the mounting hole is the same as the shape of the mounting steel plate hole of the car door woofer, and smaller than the mounting steel plate hole of the car door woofer;

Multiple screw holes are evenly formed on the front box body along the circumferential direction;

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

The diaphragm area of the passive woofer is larger than the diaphragm area of the active woofer;

The installation plane of the passive woofer is parallel or coplanar with the installation plane of the active woofer;

When the passive woofers are arranged in pairs, the two passive woofers in each pair are installed with the same wall, that is, the two passive woofers in each pair are respectively installed on the front wall of the rear box And on the back wall;

When the passive woofers are arranged in pairs, the walls of the two passive woofers in each pair are the same, that is, one passive woofer in each pair is installed in the front box where the active woofer is located On the box wall of the body, another passive woofer in each pair is installed on the box wall of the rear box;

When there is only one passive woofer, it is installed on the front box wall of the rear box close to the front box.

The advantages and positive effects of the present invention are:

1. The present invention adopts the structural design of the front and rear boxes and the crooked neck throat. The volume is only about 1.3 liters. It can easily replace the traditional car door woofer and be installed in the lower part of the car door, without the need to the original car door. Make any changes to the structure.

2. The invention utilizes the corresponding passive speaker resonance, the air spring effect of the acoustic airflow in the subwoofer box, the secondary bass boost of the door volume outside the box and the bass boost effect of the passenger's footrest, which can get perfect shocking heavy bass effect.

3. The present invention adopts the corresponding passive woofer settings. During electroacoustic conversion, the pair of passive woofer diaphragms have the opposite vibration direction, the vibration amplitude is equal, and the vibration force cancels, which greatly reduces the mechanical vibration of electroacoustic conversion and reduces the door. Vibration improves the life and reliability of the door.

4. The invention overcomes the shortcomings of the sharp drop of the bass effect of the traditional car subwoofer at a low volume, and achieves the reduction balance of the bass at a large volume and a small volume well.

5. The present invention uses 3.5-inch small-caliber speakers and uses only one car door subwoofer to obtain better sound quality than four 6.5-inch traditional car door woofer solutions, and the cost is reduced by 75%.

6. The present invention reduces the space occupied by the car woofer in the car and increases the available space in the car.

7. The invention reduces the installation components of the whole vehicle, and reduces the technical difficulty of the design and manufacture of the whole vehicle.

8. The present invention reduces bass sound delay and wind noise, and is more accurate and pure than traditional inverted car subwoofers.

9. The car door subwoofer of the present invention is an integrated plastic box structure, and the woofer speaker unit can obtain additional protection, extend the service life, and is more waterproof and not easily damaged.

10. The invention reduces the weight of the car speaker system by 70%, which will reduce the weight of the door and the weight of the whole car.

BRIEF DESCRIPTION

1A is a cross-sectional view of the structure of Embodiment 1 of the present invention;

1B is a cross-sectional view of a three-dimensional structure of Embodiment 1 of the present invention;

2A is a structural cross-sectional view of Embodiment 2 of the present invention;

2B is a cross-sectional view of a three-dimensional structure of Embodiment 2 of the present invention;

3A is a structural cross-sectional view of Embodiment 3 of the present invention;

3B is a cross-sectional view of a three-dimensional structure of Embodiment 3 of the present invention;

4A is a structural cross-sectional view of Embodiment 4 of the present invention;

4B is a cross-sectional view of a three-dimensional structure of Embodiment 4 of the present invention;

5A is a structural cross-sectional view of Embodiment 5 of the present invention;

5B is a cross-sectional view of a three-dimensional structure of Embodiment 5 of the present invention;

6A is a structural cross-sectional view of Embodiment 6 of the present invention;

6B is a cross-sectional view of a three-dimensional structure of Embodiment 6 of the present invention;

Among them: 1 is the car door subwoofer, 2 is the front box, 3 is the rear box, 4 is the crooked neck throat, 5 is the active woofer, 6 is the passive woofer, 7 is the screw hole, and 8 is the installation hole .

detailed description

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

The invention includes a front box 2, a rear box 3, a crooked neck throat pipe 4, an active woofer 5 and a passive woofer 6, wherein the front box 2 and the rear box 3 are both independent sealed boxes. The front box The body 2 and the rear box 3 communicate with each other through the crutch throat pipe 4 to realize the conduction of the acoustic airflow. The portion where the crutch throat pipe 4 communicates with the front box body 2 and the crutch throat pipe 4 and the rear box body 2 The communicating parts are inclined, that is, there is a bent part on the cranial throat tube 4 between the cranial throat tube 4 communicating with the front box 2 and the cranial throat tube 4 communicating with the rear box 2. An active woofer 5 is placed in the front cabinet 2, and the active woofer 5 is installed on the front cabinet wall of the front cabinet 2. The rear cabinet 3 is provided with a passive woofer 6, the passive woofer 5 is set in one or in pairs, and when the passive woofer 5 is one, it is installed on the front box wall or the rear box wall of the rear box 3 ; When the passive woofer 5 is set in pairs, it corresponds to the front and rear, one passive woofer 5 in each pair is installed on the wall of the rear cabinet 3, and the other passive woofer 5 in each pair is installed in The box wall of the rear box 3 or the box wall of the front box 2 is installed. A plurality of screw holes 7 are evenly formed on the outer edge of the front box 2 in the circumferential direction for fixing the car door subwoofer on the car door.

The front box 2 extends outward toward the side of the rear box 3 to form a mounting hole edge 8. One end of the crutch throat 4 communicates with the mounting hole edge 8, and the other end communicates with the rear box 3. The shape of the outer surface of the mounting hole edge 8 is the same as the shape of the mounting steel plate hole of the car door woofer, and smaller than the mounting steel plate hole of the car door woofer.

The circumference of the rear case 3 is less than or equal to the circumference of the front case 2. The outer edge of the rear case 3 is coplanar with the outer edge of the front case 2 or protrudes beyond the outer edge of the front case 2.

The installation plane of the passive woofer 6 is parallel or coplanar with the installation plane of the active woofer 5. The diaphragm area sum of the passive woofer 6 is larger than that of the active woofer 5.

When the active woofer 5 of the present invention is 3.5 inches, the sum of the volumes of the front box 2, the rear box 3 and the crooked throat 4 is about 1.3 liters, which is proportional to the diaphragm area of the active woofer 5. Because the installation structure of the car door woofer is a traditional 6.5-inch woofer, it is tailor-made. Although the 1.3-liter volume subwoofer of the present invention is already very small, it is still difficult to install it on the vehicle door without changing the structure. Therefore, the box body of the automobile door subwoofer 1 of the present invention is divided into a front box body 2 and a rear box body 3, and they realize the sound air flow through the crooked neck throat pipe 4; the whole of the present invention is in the shape of a letter "h", front Box 2 is located on the outside of the door woofer mounting steel plate, and rear box 3 is located on the inner side of the door woofer mounting steel plate, so that the car door subwoofer can be designed very flexibly according to the different door structures of different models.

Example one

As shown in FIGS. 1A and 1B, this embodiment directly replaces the existing 6.5-inch woofer on the right front door of an original car with an "h" shaped car door subwoofer. The front box 2 of the car door subwoofer of this embodiment is a cylindrical box, and the rear box wall extends outward to form a cylindrical mounting hole edge 8, the outer diameter of the mounting hole edge 8 is smaller than that of the original car woofer installation The hole diameter of the steel plate, the hole diameter is about 145mm. Here, the diameter and height of the front box 2 should be such that they do not interfere with the trim panel in the door of the car. In this embodiment, the diameter of the front case 2 is φ165 mm, and the diameter of the mounting hole edge 8 is φ130 mm. The active woofer 5 is disposed on the front wall of the front cabinet 2. The active woofer 5 may be round or oval. In this embodiment, a 3.5-inch circular cone woofer is used.

The rear box 3 should be prevented from interfering with the window lift glass. On the one hand, the volume of the box should be obtained, and on the other hand, it will not interfere with the window lift glass. When all the glass falls, keep a distance of 8mm or more. The outer shape of the rear box 3 in this embodiment is partially cylindrical, and its radius is less than or equal to the radius of the front box 2. The crooked neck throat tube 4 is a transparent tube used to connect the front cabinet 2 and the rear cabinet 3; this way, on the one hand, the volume is fully increased, and on the other hand, the strength of the entire subwoofer cabinet is ensured. The cross-sectional area of the crutch throat tube 4 is greater than 1000 mm ^2. This embodiment is a half-moon-shaped tube. That is, the end of the crutch throat tube 4 in this embodiment communicating with the front box 2 is a straight tube, which is connected to the rear box 3 The axial cross-section of the other end of the communication is a bevel; the cross-sectional area of the crutch throat pipe 4 of this embodiment is 5000 mm ² . The sum of the volume of the front cabinet 2, the rear cabinet 3 and the crutch throat pipe 4 of this embodiment is 1.3 liters. For the 3.5-inch active woofer 5, the corresponding cabinet volume is about 1.3 liters, which is better than 1.3 It is difficult to install in the car door, and the bass effect less than 1.3 liters starts to deteriorate. The passive woofer 6 may be one or a pair. Passive woofer is also called bass radiator, it can be round, oval or rectangular, the shape can be flat or conical. The passive woofer 6 has a diaphragm area 1.5 times larger than the active woofer 5 diaphragm area. The passive woofer 6 is installed on the wall of the front cabinet 2 or the rear cabinet 3, and the installation plane of the passive woofer 6 and the active bass The installation planes of the speakers 5 are coplanar or parallel. This embodiment uses a pair of circular flat passive woofers with a diameter of φ88mm, which are installed on the front and rear walls of the rear cabinet 3 one after the other, and the pair of passive woofer 6 installation plane and active The installation plane of the woofer 5 is parallel. In this embodiment, the outer edge of the rear case 3 is coplanar with the outer edge of the front case 2.

In this embodiment, four screw holes 7 are evenly arranged on the outer edge of the front box 2 in the circumferential direction. The opening positions of the screw holes 7 are the same as the positions where the original car door woofer is installed on the door steel plate, and the fixing screws used are also the same .

The car door subwoofer 1 can be made of plastic, metal, etc. In this embodiment, it is made by open mold injection. First design the appearance and structure according to the original car door structure and the design principles described in this example; then make the box mold, the box is made of ABS and other materials by injection molding, and then install the active woofer 5 and passive woofer 6 in Corresponding to the front box 2 and the rear box 3. Then install the completed car door subwoofer 1 to the front passenger door. Of course, it can also be installed in the lower part of the front driving door or the lower part of the rear left and right doors. The whole car can be installed not only one, but also two (such as the lower part of the front and front passenger doors) or four (one for each of the four doors), so that the bass effect will be better.

Example 2

As shown in FIGS. 2A and 2B, the difference between this embodiment and the first embodiment is that a pair of passive woofer 6 of this embodiment, one of which is installed on the wall of the rear box 3 and the other On the front box wall of the front box body 2 and coplanar with the mounting plane of the active woofer 5. Therefore, the inner diameter of the end of the crutch throat tube 4 communicating with the front box 2 of this embodiment is larger than that of the first embodiment; furthermore, the shaft of the other end of the crutch throat tube 4 communicating with the rear box 3 of this embodiment The cross-section is an inwardly concave arc. The rest are the same as in the first embodiment.

Example Three

As shown in FIGS. 3A and 3B, the difference between this embodiment and the first embodiment is that a pair of passive woofer 6 of this embodiment, one of which is installed on the front wall of the rear cabinet 3, and the other On the front box wall of the front box body 2 and coplanar with the mounting plane of the active woofer 5. The rest are the same as in the first embodiment.

Example 4

As shown in FIGS. 4A and 4B, the difference between this embodiment and the first embodiment is that the length of the crutch throat tube 4 of this embodiment is greater than the length of the crutch throat tube 4 of the first embodiment, and it communicates with the front box 2 One end is a straight pipe, the other end communicating with the rear case 3 is a curved pipe, the axial centerline of the portion where the neck throat 4 communicates with the front case 2 and the axial center of the portion communicating with the rear case 3 The lines are perpendicular. The outer edge of the rear box 3 of this embodiment protrudes from the outer edge of the front box 2, so that it can be more conveniently and flexibly designed under the already-constrained door structure to adapt to the installation environment of different door woofer speakers. The rest are the same as in the first embodiment.

Example 5

As shown in FIG. 5A and FIG. 5B, the difference between this embodiment and the second embodiment is that the passive woofer 6 in this embodiment is one, which is a circular flat passive woofer with a diameter of 120 mm, and this passive The woofer is installed on the front box wall of the rear box 3. The inner diameter of the end of the crutch throat pipe 4 of this embodiment communicating with the front box 2 may be the same as that of the first embodiment. The rest are the same as in the second embodiment.

Example Six

As shown in FIGS. 6A and 6B, the difference between this embodiment and Embodiment 4 is that the passive woofer 6 in this embodiment is one, which is a circular flat passive woofer with a diameter of φ120 mm, and this passive The woofer is installed on the front box wall of the rear box 3. The rest are the same as in the fourth embodiment.

The working principle of the present invention is:

When the power of the subwoofer (below 250 Hz) is applied to the active woofer 5, the active woofer diaphragm vibrates to produce bass sound, which performs electroacoustic conversion. When the diaphragm of the active woofer 5 vibrates in the direction of the front box 2, the air in the front box 2 is compressed, making the air pressure in the front box 2 stronger than that of the neck throat 4 and the rear box 3 With the pressure, the air in the front box 2 will flow into the rear box 3 through the crutch throat 4. At this time, the pressure of the front and

rear cabinets

2 and 3 is stronger than the air pressure of the listening environment, causing the diaphragm of the passive woofer 6 to vibrate toward the outside of the respective cabinet; when the diaphragm of the active woofer 5 is forward of the cabinet 2 When vibrating, the pressure in the front box 2 is reduced, and the air in the rear box 2 flows through the neck throat 4 to the front box 2. This flow produces the effect of an air acoustic spring, and the area of both the active diaphragm and the passive diaphragm is doubled, which greatly enhances the bass sound wave. This bass sound wave is not directly radiated into the listening space, but firstly propagates into the cabin door, which further enhances the bass sound wave in the cabin door, and then propagates to the passenger's foot warehouse. It has been improved. As a result of multiple bass enhancements, the door subwoofer with a 1.3-liter cabinet volume of 3.5-inch woofer has a thick, pure and powerful bass. In addition, the unique design of the front box, rear box, double box and crooked throat of the 1.3-liter small box makes it easy to directly replace the original car without any changes to the original car door structure. The car door has a 6.5-inch woofer, and the bass effect of such a car door subwoofer is better than that of four traditional car door 6.5-inch woofers, and the cost is reduced by 75%. In the case of a significant cost reduction, the car's bass is more good.

Claims

A car door subwoofer, characterized by comprising a front box (2), a rear box (3), a crooked neck throat (4), an active woofer (5) and a passive woofer (6), wherein the front The box body (2) and the rear box body (3) are independent sealed boxes, and the front box body (2) and the rear box body (3) are connected through the crooked neck throat pipe (4) to achieve For the conduction of acoustic airflow, the part where the crutch throat (4) communicates with the front box (2) and the part where the crutch throat (4) communicates with the rear box (2) are inclined, ie There is a bend on the cranial throat (4) between the part where the cranial throat (4) communicates with the front box (2) and the part where the crutch throat (4) communicates with the rear box (2) The position of the front box (2) is provided with an active woofer (5), the active woofer (5) is installed on the front box wall of the front box (2); the rear box ( 3) The content is provided with a passive woofer (6), the passive woofer (5) is set in one or in pairs, and when the passive woofer (5) is one, it is installed in the rear box (3) ) On the front box wall or the rear box wall, when the passive woofer (5) is arranged in pairs, it corresponds to the front and back, one passive woofer (5) in each pair is installed in the rear box (3 ) On the box wall, the other passive woofer (5) in each pair is installed on the box wall of the rear box (3) or on the box wall of the front box (2).
The car door subwoofer according to claim 1, characterized in that: the front box (2) extends outward toward a side of the rear box (3) to form a mounting hole edge (8), and the crooked neck One end of the throat pipe (4) communicates with the mounting hole edge (8), and the other end communicates with the rear box (3).
The car door subwoofer according to claim 2, wherein the outer surface shape of the mounting hole edge (8) is the same as the shape of the car door woofer mounting steel plate hole and is smaller than the car door woofer mounting steel plate hole .
The automobile door subwoofer according to claim 1, wherein a plurality of screw holes (7) are evenly opened in the circumferential direction on the front box (2).
The automobile door subwoofer according to claim 1, characterized in that the circumference of the rear box (3) is less than or equal to the circumference of the front box (2), and the outer edge of the rear box (3) It is coplanar with the outer edge of the front box (2) or protrudes from the outer edge of the front box (2).
The car door subwoofer according to claim 1, wherein the diaphragm area of the passive woofer (6) is larger than the diaphragm area of the active woofer (5).
The automobile door subwoofer according to claim 1, characterized in that the installation plane of the passive woofer (6) is parallel or coplanar with the installation plane of the active woofer (5).
The car door subwoofer according to claim 1, characterized in that when the passive woofer (6) is arranged in pairs, the walls of the two passive woofers (6) in each pair are the same, ie The two passive woofers (6) in each pair are respectively installed on the front box wall and the rear box wall of the rear box body (3).
The car door subwoofer according to claim 1, characterized in that when the passive woofer (6) is arranged in pairs, the walls of the two passive woofers (6) in each pair are the same, ie One passive woofer (6) in each pair is installed on the wall of the front cabinet (2) where the active woofer (5) is located, and the other passive woofer (6) in each pair They are all installed on the wall of the rear box (3).
The car door subwoofer according to claim 1, characterized in that when the passive woofer (6) is one, it is installed in the front box of the rear box (3) close to the front box (2) On the wall.