CN108632720B - Single-cavity sandwich type automobile subwoofer - Google Patents
Single-cavity sandwich type automobile subwoofer Download PDFInfo
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- CN108632720B CN108632720B CN201710177227.7A CN201710177227A CN108632720B CN 108632720 B CN108632720 B CN 108632720B CN 201710177227 A CN201710177227 A CN 201710177227A CN 108632720 B CN108632720 B CN 108632720B
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- 238000009434 installation Methods 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 230000003993 interaction Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 239000010410 layer Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 239000006260 foam Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
- H04R2400/11—Aspects regarding the frame of loudspeaker transducers
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- Acoustics & Sound (AREA)
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Abstract
The invention relates to a single-cavity sandwich type automobile subwoofer, which comprises a subwoofer body, and a subwoofer group which are respectively arranged in the subwoofer body, wherein the number of the subwoofer is at least one, the subwoofer is arranged on the wall of the subwoofer body, the number of the subwoofer group is at least one, each group of two subwoofer units, the front and the back of the two subwoofer units are correspondingly arranged, the two subwoofer units are respectively arranged on the wall of the subwoofer body, and the installation planes of the two subwoofer units are coplanar, parallel, perpendicular or inclined with the installation plane of the subwoofer. The invention completes electroacoustic conversion in a single bass box through the interaction of the bass loudspeaker and the bass radiator group, so that the volume of the bass gun is reduced by 90 percent, the bass gun is light in weight, shocking, thick, heavy and elastic and purer bass can be generated, the problem that the bass gun is large and difficult to install and use is solved, and the bass gun is suitable for being installed and used in front of vehicles, rear vehicles and the like which are required to be small in volume, thin and good in bass.
Description
Technical Field
The invention relates to a sound box of a sound system of a car, in particular to a single-cavity sandwich type car subwoofer.
Background
With the progress of science and technology, people have increasingly high requirements on the sound quality of car audio. In the handbook of speaker and speaker design, published by Fujian science and technology Press in 2008, 7 months, closed speakers (pages 60-67), open speakers (pages 67-77), and passive radiating speakers (pages 77-78) are disclosed. The automobile subwoofer manufactured by the disclosed technology has the following four structures:
1. the integrated automobile bass loudspeaker is arranged on the bass box body, and bass is generated by utilizing the box body volume of 20-30 liters of the bass box body.
2. A car body type car subwoofer, namely a bass loudspeaker is arranged on a box body with a certain space formed by a car body, and the box body is formed by 20-30 liters of the car body.
3. The trunk car subwoofer is characterized in that a subwoofer is arranged on a rear window platform which is isolated from the trunk in a carriage, and the volume of about 500 liters of the trunk is used as a box body of the subwoofer.
4. The low sound box of the carriage door is characterized in that a low sound loudspeaker is arranged in the carriage door, and an interlayer space formed by the outer wall and the inner wall of the carriage door is used as a low sound box body.
The automobile subwoofer needs to use a 6.5-12 inch large-caliber subwoofer, most of the subwoofers also need to be ultrathin, special process manufacturing is needed, and the cost is high; the carriage door and the trunk room cannot be sealed, air leakage cannot be caused, a real bass box cannot be formed, and the volume is either too large or too small, so that the requirements of a bass gun cannot be met, and therefore, the bass effect is poor; the precious car body can be used as a bass box, the whole car body is required to be redesigned, the volume is difficult to meet the requirement, and the sealing process is complex and difficult; thus, the existing automobile subwoofer has the defects of large volume, complex and difficult installation and sealing process in the automobile, high cost and poor bass effect.
Disclosure of Invention
In order to solve the problems of the existing automobile subwoofers, the invention aims to provide the single-cavity sandwich type automobile subwoofers with a novel physical acoustic structure. The automobile subwoofer can be well applied to various automobiles.
The aim of the invention is realized by the following technical scheme:
the invention comprises a bass box body, and a bass loudspeaker and a bass radiator group which are respectively arranged in the bass box body, wherein the number of the bass loudspeakers is at least one, the bass loudspeakers are arranged on the box wall of the bass box body, the number of the bass radiator group is at least one, each group of two bass radiator units, the two bass radiator units are correspondingly arranged front and back and are respectively arranged on the box wall of the bass box body, and the installation planes of the two bass radiator units are coplanar, parallel, vertical or inclined with the installation plane of the bass loudspeakers;
wherein: an air gap for forming an aeroacoustic air cushion is arranged on the single-cavity sandwich type automobile bass loudspeaker, and bass sound waves are transmitted to a listening space through the air gap; a diaphragm cover plate connected with a bass box body is respectively arranged on the outer side of the diaphragm of the bass loudspeaker and the outer side of the diaphragm of each bass radiator unit in the bass radiator group, and air gaps are formed between the diaphragm cover plate and the diaphragm of the bass loudspeaker and between the diaphragms of each bass radiator unit; the single-cavity sandwich type automobile bass loudspeaker is characterized in that a bass outer box cover is arranged at the outermost side of the single-cavity sandwich type automobile bass loudspeaker, the vibrating diaphragm cover plate and the bass box are both accommodated in the bass outer box cover, and a bass outlet for transmitting bass sound waves to a listening space is formed in the bass outer box cover; the vibrating diaphragm cover plate completely covers the vibrating diaphragm of the woofer and the vibrating diaphragms of the woofer units, the positions of the vibrating diaphragm cover plate corresponding to the vibrating diaphragms of the woofer and the positions of the vibrating diaphragms corresponding to the woofer units are respectively the same as the vibrating diaphragms of the woofer and the vibrating diaphragms of the woofer units, and the air gaps with the same shape are formed;
the outer side of the bass box body is provided with a bass outer box body cover, the bass outer box body cover is arranged on the bass box body, an air gap for forming an aeroacoustic air cushion is reserved between the bass box body and the bass box body, and bass sound waves are transmitted to a listening space through the air gap;
the woofer consists of identical woofer units which are symmetrically arranged, and all the woofer units are arranged on the same wall of the woofer body and are connected in electroacoustic and in-phase;
all the bass radiator units in each bass radiator group are the same, the walls of the bass boxes mounted by all the bass radiator units are parallel or coplanar, and two bass radiator units in each group of bass radiator groups are symmetrically mounted on the two walls of the bass boxes which are parallel to each other;
the highest point of the vibrating part of the bass speaker unit of the bass speaker is on the same plane with the highest point of the vibrating part of the bass radiator unit of the bass radiator group;
the minimum volume of the bass box varies with the diaphragm area of the bass speaker, and the optimum volume of the bass box varies linearly with the number of bass speaker units of the bass speaker, i.e., r=c×n, where R is the optimum volume of the bass box, C is the optimum volume of the bass box of one bass speaker unit, and N is the number of bass speaker units of the bass speaker.
The invention has the advantages and positive effects that:
1. the invention adopts the bass box body with a single cavity, and at least one bass loudspeaker and at least one group of bass radiators are arranged in the bass box body, and the bass loudspeakers and the groups of bass radiators jointly complete electroacoustic conversion through the interaction of sound waves, so that the volume of the required box body is greatly reduced to less than 3 liters, the weight is greatly reduced, the thickness is thinner, and the problem that the bass gun in the prior art is difficult to install and use in an automobile is solved; the invention can be conveniently placed under the seats of positive and negative drivers or at a carriage door or other small places in the car, and can be well applied to front-loading of the whole car factory and rear-loading of the purchased car for improving the tone quality.
2. The invention is provided with the diaphragm cover plate, thereby not only effectively protecting the diaphragm of the bass loudspeaker and the diaphragm of the bass radiator unit, but also forming an air gap, and the bass sound wave can only be transmitted from the window through the air gaps in different directions, so that an acoustic air cushion is formed, and the bass effect is further improved.
3. The invention overcomes the defect that the diaphragm of the bass loudspeaker of the traditional technology directly faces the listening space, and can radiate unwanted middle-pitch noise, thereby reducing the bass purity of the bass loudspeaker; the invention is provided with the diaphragm cover plate, and the midrange cannot be directly radiated to the listening space, so that the bass of the bass loudspeaker is purer.
4. The invention adopts a plurality of bass speakers, improves electroacoustic conversion efficiency and greatly improves the power of the bass speaker; meanwhile, the power born by each woofer is reduced, the displacement of the voice coil of the woofer is reduced, and the electroacoustic conversion distortion of the woofer is reduced.
5. The invention adopts the low-tone radiator groups, each group of low-tone radiator groups consists of a pair of low-tone radiator units, the low-tone radiator units are symmetrically arranged in front of and behind each other, the low-tone radiator units vibrate simultaneously, the vibration directions are opposite, the vibration amplitudes are equal, the vibration forces are counteracted, the mechanical vibration of electroacoustic conversion is greatly reduced, the low-tone is enhanced, the vibration noise is reduced, the low-tone delay is reduced, and the low-tone response speed is superior to that of the inverted opening low-tone cannon in the prior art.
6. The invention overcomes the defect that the bass effect of the conventional bass loudspeaker is suddenly reduced in small volume, and the bass restoration is very good in small volume, thereby well realizing the bass restoration balance of large volume and small volume of bass.
7. The invention has small volume and is provided with the vibrating diaphragm cover plate, thereby being more beneficial to ID design.
8. The invention uses small-caliber common bass loudspeaker, such as 3.5 inch common bass loudspeaker to replace 10 inch special bass loudspeaker, and has the advantages of less total material, low cost and easy production and manufacture.
9. When the invention is installed in a car, the size of the loudspeaker of each carriage door is greatly reduced, for example, the size of the loudspeaker is changed from a 6.5 inch loudspeaker to a 2 inch loudspeaker, the space occupied by the car door is greatly reduced, and the weight of the car door is reduced.
10. When the invention is applied in a car, the electroacoustic conversion vibration of a carriage door is reduced, and the service life of the car door and the reliability of the whole car are improved.
11. The bass loudspeaker overcomes the defect that the upper surface of the vibrating diaphragm of the bass loudspeaker in the prior art cannot be covered, is not afraid of covering, and is easier to put and install in a vehicle.
12. The invention eliminates wind noise generated by the phase inversion tube and the sound outlet of the bass loudspeaker in the prior art and the noise transmitted by the bass sound air flow, so that the played bass is purer.
Drawings
FIG. 1A is a cross-sectional view of a first embodiment of the present invention;
FIG. 1B is a left side view of FIG. 1A;
FIG. 2A is a cross-sectional view of a second embodiment of the present invention;
FIG. 2B is a bottom view of FIG. 2A;
FIG. 3A is a cross-sectional view of a third embodiment of the present invention;
FIG. 3B is a bottom view of FIG. 3A;
FIG. 4A is a cross-sectional view of a fourth embodiment of the present invention;
FIG. 4B is a left side view of FIG. 4A;
FIG. 5A is a cross-sectional view of a fifth embodiment of the present invention;
FIG. 5B is a bottom view of FIG. 5A;
FIG. 6A is a cross-sectional view of a sixth embodiment of the present invention;
FIG. 6B is a left side view of FIG. 6A;
FIG. 7A is a cross-sectional view of a seventh embodiment of the present invention;
FIG. 7B is a left side view of FIG. 7A;
FIG. 8A is a schematic diagram of an eighth embodiment of the present invention;
FIG. 8B is a right side cross-sectional view of FIG. 8A;
fig. 9A is a structural cross-sectional view of a ninth embodiment of the present invention;
FIG. 9B is a right side view of FIG. 9A;
FIG. 10A is a cross-sectional view of a tenth embodiment of the present invention;
FIG. 10B is a top view of FIG. 10A;
wherein: 1 is a bass box body, 2 is a bass loudspeaker, 3 is a bass radiator group, 4 is a vibrating diaphragm cover plate, 5 is an air gap, 6 is a connecting column, 7 is a bass outer box body cover, and 8 is a bass outlet.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
The invention comprises a bass box body 1, a bass loudspeaker 2 and a bass radiator group 3 which are respectively arranged in the bass box body 1, wherein at least one (one to eight) bass loudspeaker 2 is arranged on the wall of the bass box body 1, at least one (one to eight) bass radiator group 3 is arranged on each group of two bass radiator units, the two bass radiator units are correspondingly arranged in front and back and are respectively arranged on the wall of the bass box body 1, and the installation planes of the two bass radiator units are coplanar with, parallel to, perpendicular to or inclined to the installation plane of the bass loudspeaker 2. The woofer 2 is composed of identical woofer units, which are symmetrically arranged; all the bass loudspeaker units are arranged on the same wall of the bass box body 1 and are connected in an electroacoustic and in-phase manner.
All the bass radiator units in each bass radiator group 3 are the same, and the walls of the bass box body 1 on which all the bass radiator units are mounted are parallel or coplanar, and two bass radiator units in each group of bass radiator groups 3 are symmetrically mounted on the two walls of the bass box body 1 which are parallel to each other. When the woofer 2 and the woofer group 3 are disposed, the highest point of the vibration member [ such as a diaphragm or a folded ring (also referred to as a rubber edge, a foam edge, etc) ] of the woofer unit of the woofer 2 is on the same plane as the highest point of the vibration member [ such as a diaphragm or a folded ring (also referred to as a rubber edge, a foam edge, etc) ] of the woofer unit of the woofer group 3. The minimum volume of the woofer body 1 varies with the diaphragm area of the woofer 2, for example, a minimum volume required for a 92mm diameter conical 3.5 inch woofer unit is 1.1 liter and an optimum volume is 1.3 liters, since the bass effect does not increase after 1.3 liters and decreases sharply with decreasing volume, the minimum volume required for a conical woofer unit is: 2 inches 0.1 liter, 2.5 inches 0.2 liter, 3 inches 0.4 liter, 3.5 inches 1 liter, 4 inches 2 liter, 4.5 inches 4 liter. The required minimum volume of a single elliptical woofer unit refers to a conical woofer unit with a similar diaphragm area as its diaphragm area. The optimal volume of the woofer 1 varies linearly with the number of woofer units of the woofer 2, i.e. r=c×n, where R is the optimal volume of the woofer 1, C is the optimal volume of the woofer 1 of one woofer unit, and N is the number of woofer units of the woofer 2.
The single-cavity sandwich type automobile bass is provided with the air gap 5 for forming the aeroacoustic air cushion, and bass sound waves are transmitted to a listening space through the air gap 5.
The diaphragm cover plate 4 connected with the bass box body 1 is respectively arranged on the outer side of the diaphragm of the bass loudspeaker 2 and the outer side of the diaphragm of each bass radiator unit in the bass radiator group 3, the diaphragm cover plate 4 is connected with the bass box body 1 through a plurality of connecting posts 6, and air gaps 5 are formed between the diaphragm cover plate 4 and the diaphragm of the bass loudspeaker 2 and between the diaphragms of each bass radiator unit. The single-cavity sandwich type automobile subwoofer is characterized in that a bass outer box cover 7 is additionally arranged on the outermost side of the single-cavity sandwich type automobile subwoofer, the bass outer box cover 7 is arranged on the bass box body 1 through a plurality of connecting columns 6, the vibrating diaphragm cover plate 4 and the bass box body 1 are contained in the bass outer box cover 7, and a bass outlet 8 for transmitting bass sound waves to a listening space is formed in the bass outer box cover 7. The diaphragm cover 4 completely covers the diaphragm of the woofer 2 and the diaphragms of the woofers, and the diaphragm cover 4 corresponds to the diaphragm of the woofer 2 and the diaphragm of the woofers and has the same shape as the diaphragm of the woofer 2 and the diaphragm of the woofers and forms an air gap 5 with the same shape.
Alternatively, the outer side of the bass box 1 is provided with a bass outer box cover 7, the bass outer box cover 7 is mounted on the bass box 1 through a plurality of connecting posts 6, and an air gap 5 forming an aeroacoustic air cushion is reserved between the bass box and the bass box 1, and bass sound waves are transmitted to a listening space through the air gap 5.
The diaphragm cover plate 4 of the present invention may be replaced by the installation environment side wall of the bass box body 1, such as by replacing the diaphragm cover plate 4 with a car body, an inner and outer box wall of a car door, or the like.
Example 1
As shown in fig. 1A and 1B, the subwoofer of the present embodiment has only one single-cavity bass box 1, the bass box 1 is in a cuboid shape, four bass speakers 2 are disposed in the bass box 1, and two groups of the four bass speakers are symmetrically mounted on the front wall of the bass box 1 respectively; the woofer 2 may be composed of one woofer unit or a plurality of woofer units, and each woofer unit may be circular or elliptical. In this embodiment, a circular woofer unit having a diameter of 92mm is installed in each woofer 2. Two groups of bass radiators 3 are also arranged in the bass box body 1, each group of bass radiators 3 consists of a pair of (2) bass radiator units, and the pair of bass radiator units in each group are arranged in a front-back corresponding mode. The bass radiator is also called passive low frequency radiator, also called air horn, which has no magnet and voice coil, only diaphragm and its supporting device. It may be circular, oval or rectangular, and may be flat or conical in shape. In this embodiment, two identical groups of bass radiators 3 are used, each group of bass radiators 3 being formed by two identical rectangular bass radiator units having dimensions 90mm x 125mm. The two groups of bass radiators 3 are symmetrically arranged in the middle of the bass box 1, wherein two bass radiator units are arranged on the front box wall of the same bass box 1 as the bass loudspeaker 2, and the other 2 bass radiator units are arranged on the rear box wall corresponding to the front box wall of the bass box 1.
Outside the bass box body 1, the diaphragm of the bass loudspeaker 2 and the diaphragm of the bass radiator group 3 are respectively provided with a diaphragm cover plate 4, and air gaps 5 are respectively formed between the diaphragm cover plate 4 and the diaphragm of the bass loudspeaker 2 and between the diaphragm cover plate 4 and the diaphragm of the bass radiator group 3, and the air gaps 5 form an aeroacoustic air cushion. The diaphragm cover plate 4 of the present embodiment is a flat plate. The size of the air gap 5 is 2mm to 50mm, in this example 10mm. The bass box body 1 and the vibrating diaphragm cover plate 4 are fixedly connected through the connecting columns 6, and a plurality of connecting columns 6 are needed, so that the vibrating diaphragm cover plate 4 is prevented from vibrating, vibration noise is generated, and the effect of an acoustic air cushion is affected. The thickness of the diaphragm cover plate 4 is 1 mm-5 mm, and the thickness is 3mm in the embodiment. The material of the diaphragm cover plate 4 can be plastic, wood, metal or the like, and is a bottom plate which cannot have any holes and gaps; in this example, plastic was used. Thus, the seven-layer sandwich-type bass loudspeaker with the two layers of vibrating diaphragm cover plates 4, the two layers of double-sound air cushion with the air gaps 5, the two layers of vibrating diaphragms and the one layer of bass loudspeaker body can be formed front and back.
The bass box body 1 can be made of plastics, metal, wood and the like, can be made of plates, or can be made by a method of open mold injection molding; the bass box 1 of the present embodiment is manufactured by a mold-opening injection molding method, and has the following dimensions: 330mm by 280mm by 65mm. Note also that all woofer units are electroacoustic in-phase connected.
The single-cavity sandwich type automobile subwoofer can be installed at the positions of left and right carriage doors or under front and back seats of an automobile besides the existing automobile loudspeaker box.
Example two
As shown in fig. 2A and 2B, the difference between the present embodiment and the first embodiment is that: the number of the woofers 2 in the present embodiment is two, the number of the woofers 3 is two, and the number of the woofers is four, and the woofers are all the same circular woofers. The remainder was the same as in example one.
Example III
As shown in fig. 3A and 3B, the difference between the present embodiment and the second embodiment is that: the woofer 2 of the present embodiment is one, and the woofer group 3 is a group of two woofer units. The remainder was the same as in the examples.
Example IV
As shown in fig. 4A and 4B, the difference between the present embodiment and the second embodiment is that: the number of the woofers 2 is four, and the number of the woofers 3 is four, and the number of the woofers is eight; the four woofers 2 are arranged in four rows and two columns, four of the eight woofers are mounted on the same wall as the woofers 2, and the four woofers 2 form a matrix of four rows and two columns together, namely the woofers 2 in each column are alternately arranged with the woofers, and each woofer 2 is in the same row as one woofer unit. The other four bass radiator units are in one-to-one correspondence with the four bass radiator units, and the two corresponding bass radiator units are arranged in parallel with each other. The diaphragm cover plate 4 is not provided in this embodiment. The remainder was the same as in the examples.
Example five
As shown in fig. 5A and 5B, the difference between the present embodiment and the second embodiment is that: the number of the woofers 2 is two, and the number of the woofers 3 is two groups of four woofers; wherein the two bass radiator units and the two bass speakers 2 are arranged in a row and are alternately arranged from the transverse arrangement of the second embodiment to the longitudinal arrangement; the other two bass radiator units are in one-to-one correspondence with the two bass radiator units, and the corresponding two bass radiator units are arranged in parallel with each other. The remainder was the same as in the examples.
Example six
As shown in fig. 6A and 6B, the difference between the present embodiment and the first embodiment is that: the number of the woofers 2 in this embodiment is two, and the arrangement directions are opposite, that is, one is installed on the front wall of the bass box 1, and the other is installed on the rear wall of the bass box 1. The low-pitch radiator set 3 of the present embodiment is a set of two low-pitch radiator units located in the middle of two low-pitch speakers 2, one of which is mounted coplanar with one low-pitch speaker 2, and the other of which is mounted coplanar with the other low-pitch speaker 2. The remainder was the same as in example one.
Example seven
As shown in fig. 7A and 7B, the difference between the present embodiment and the sixth embodiment is that: the two woofers 2 of the embodiment are arranged in a coplanar manner, namely, are arranged on the same wall of the bass box body 1; in addition, the shape of the diaphragm cover plate 4 outside the diaphragm of the woofer 2 is the same as the shape of the diaphragm of the woofer 2. The remainder was the same as in example six.
Example eight
As shown in fig. 8A and 8B, the present embodiment is different from the third embodiment in that: the shape of the bass box body 1 of the embodiment is cylindrical, that is, in practical application, the shape of the bass box body adapted to different installation environments, such as installation physical structure environments of a car body or a car door, can be made into various shapes. The diaphragm cover plate 4 of this embodiment is flat plate-shaped, and both ends are arc-shaped. The rest is the same as the embodiment.
Example nine
As shown in fig. 9A and 9B, the present embodiment is different from the first embodiment in that: in this embodiment, the diaphragm cover plate 4 is omitted, the bass outer box cover 7 is additionally arranged on the periphery of the bass box body 1, the bass outer box cover 7 is fixed on the bass box body 1 through a plurality of connecting posts 6, the bass outlet 8 is arranged on the bass outer box cover 7, and the air gap 5 is arranged between the bass outer box cover 7 and the bass box body 1, that is, in actual use, the diaphragm cover plate 4 can be replaced by the bass outer box cover 7. The bass outer box cover 7 is realized by utilizing the installation environment of the bass gun, for example, when the bass gun is applied in a vehicle, the front wall, the rear wall and the like of the vehicle body or the vehicle door can be utilized as the diaphragm cover plate 4, so that the function of forming the air gap 5 is achieved. The remainder was the same as in example one.
Examples ten
As shown in fig. 10A and 10B, this embodiment differs from the ninth embodiment in that: in this embodiment, the number of the woofers 2 is two, the number of the woofers 3 is two, the original diaphragm cover plate 4 in the first embodiment is not omitted, but a bass outer box cover 7 is additionally arranged outside the bass box 1 with the diaphragm cover plate 4, and another air gap 5 is arranged between the bass box 1 and the bass outer box cover 7. The remainder was the same as in example nine.
The working principle of the invention is as follows:
when low-frequency audio power is applied to each woofer 2, the diaphragm of the woofer 2 vibrates, and electroacoustic conversion is achieved. Because the bass box body 1 where the bass loudspeaker 2 is located is a single cavity, when the vibrating diaphragm of the bass loudspeaker 2 vibrates towards the inner direction of the bass box body 1, air in the bass box body 1 is compressed, and then a spring effect is generated, so that the air pressure in the bass box body 1 is higher than the atmospheric pressure, and the vibrating diaphragms of the corresponding bass radiator units of the bass radiator group 3 are driven to vibrate towards the outer side of the bass box body 1. When the diaphragm of the woofer 2 is driven by low audio power and vibrates outside the woofer 1, the compressed air spring in the woofer 1 is released, and the restoring force generated by the air spring boosts the diaphragm of the woofer 2, so that the pressure in the woofer 1 is further reduced, and the pressure in the woofer 1 is lower than atmospheric pressure, thereby the diaphragm of the woofer unit vibrates inside the woofer 1 at the same time, thus the area of the woofer diaphragm is greatly increased (about 2 times is increased), the amplitude of the diaphragm is increased, the generated woofer sound wave is enhanced, and the volume of the casing is not depended on (the volume of the woofer of the conventional technology is generally 20-50 liters). In addition, a diaphragm cover plate 4 is arranged above the diaphragm of the bass box body 1, so that an air gap 5 is formed, bass sound waves cannot be directly radiated out as in the conventional technology, and the sound air flow needs to flow in the air gap 5, so that an aero-acoustic air cushion is formed, and bass sound is further enhanced. Thus, shocking, thick, heavy and elastic bass can be obtained by using the small box body. In addition, because the single-cavity bass box is a closed box, the air spring reaction force generated in the bass box 1 reduces the voice coil displacement of each bass loudspeaker, and the voice coil displacement is further reduced by sharing the audio power by a plurality of bass loudspeaker units, so that the electroacoustic conversion distortion is reduced while the bass power is increased. Meanwhile, as the pair of the bass radiator units of each group of the bass radiator groups 3 are correspondingly arranged, when the low-frequency electroacoustic conversion is realized, the vibration amplitude is equal, the vibration directions are opposite, the vibration force counteracts, and the vibration and displacement of the bass loudspeaker are greatly eliminated.
The invention greatly reduces 90% of the volume of the bass box body, has light weight, and can obtain the effect of the bass box of the traditional technology by using a 3 inch small-caliber common low-frequency loudspeaker and a small box body with more than 8 inches, so that bass is greatly enhanced; and is thicker, shocked, submerged deeper, distorted less, and the cost is lower, and it is easier to make, and the volume is smaller, thinner.
Claims (4)
1. A single-cavity sandwich type automobile subwoofer is characterized in that: the low-frequency loudspeaker comprises a low-frequency loudspeaker body (1), and a low-frequency loudspeaker (2) and a low-frequency radiator set (3) which are respectively arranged in the low-frequency loudspeaker body (1), wherein the number of the low-frequency loudspeaker (2) is at least one and the low-frequency loudspeaker is arranged on the wall of the low-frequency loudspeaker body (1), the low-frequency radiator set (3) is at least one and two low-frequency radiator units in each group, the two low-frequency radiator units are correspondingly arranged front and back and are respectively arranged on the wall of the low-frequency loudspeaker body (1), and the installation planes of the two low-frequency radiator units are coplanar, parallel, perpendicular or inclined with the installation plane of the low-frequency loudspeaker (2);
an air gap (5) for forming an aeroacoustic air cushion is arranged on the single-cavity sandwich type automobile subwoofer, and the bass sound wave is transmitted to a listening space through the air gap (5);
a diaphragm cover plate (4) connected with the bass box body (1) is respectively arranged on the outer side of the diaphragm of the bass loudspeaker (2) and the outer side of the diaphragm of each bass radiator unit in the bass radiator group (3), and an air gap (5) is formed between the diaphragm cover plate (4) and the diaphragm of the bass loudspeaker (2) and between the diaphragms of each bass radiator unit;
the single-cavity sandwich type automobile bass loudspeaker is characterized in that a bass outer box cover (7) is arranged at the outermost side of the single-cavity sandwich type automobile bass loudspeaker, the vibrating diaphragm cover plate (4) and the bass box (1) are both accommodated in the bass outer box cover (7), and a bass outlet (8) for transmitting bass sound waves to a listening space is formed in the bass outer box cover (7);
the woofer (2) is composed of the same woofer units which are symmetrically arranged, and all the woofer units are arranged on the same wall of the woofer body (1) and are connected in an electroacoustic and same phase;
all the bass radiator units in each bass radiator group (3) are the same, the walls of the bass boxes (1) mounted by all the bass radiator units are parallel or coplanar, and two bass radiator units in each group of bass radiator groups (3) are symmetrically mounted on the two walls of the bass boxes (1) which are parallel to each other.
2. The single-cavity sandwich-type car subwoofer of claim 1, wherein: the vibrating diaphragm cover plate (4) completely covers the vibrating diaphragm of the woofer (2) and the vibrating diaphragms of all the woofer units, the vibrating diaphragm cover plate (4) corresponds to the vibrating diaphragm of the woofer (2) and the vibrating diaphragm of all the woofer units, and the vibrating diaphragm cover plate corresponds to the vibrating diaphragm of the woofer (2) and the vibrating diaphragm of all the woofer units, and forms the air gap (5) with the same shape.
3. The single-cavity sandwich-type car subwoofer of claim 1, wherein: the highest point of the vibration part of the woofer unit of the woofer (2) and the highest point of the vibration part of the woofer unit of the woofer group (3) are on the same plane.
4. The single-cavity sandwich-type car subwoofer of claim 1, wherein: the minimum volume of the bass box body (1) changes along with the diaphragm area of the bass loudspeaker (2), the optimal volume of the bass box body (1) changes along with the number of the bass loudspeaker units of the bass loudspeaker (2) linearly, namely R=C×N, wherein R is the optimal volume of the bass box body (1), C is the optimal volume of the bass box body (1) of one bass loudspeaker unit, and N is the number of the bass loudspeaker units of the bass loudspeaker (2).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710177227.7A CN108632720B (en) | 2017-03-23 | 2017-03-23 | Single-cavity sandwich type automobile subwoofer |
| PCT/CN2018/078500 WO2018171440A1 (en) | 2017-03-23 | 2018-03-09 | Single-cavity sandwich-type automobile subwoofer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710177227.7A CN108632720B (en) | 2017-03-23 | 2017-03-23 | Single-cavity sandwich type automobile subwoofer |
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| Publication Number | Publication Date |
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| CN108632720A CN108632720A (en) | 2018-10-09 |
| CN108632720B true CN108632720B (en) | 2024-01-09 |
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| CN201710177227.7A Active CN108632720B (en) | 2017-03-23 | 2017-03-23 | Single-cavity sandwich type automobile subwoofer |
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| Country | Link |
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| CN (1) | CN108632720B (en) |
| WO (1) | WO2018171440A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111327992A (en) * | 2018-12-14 | 2020-06-23 | 深圳纽斯声学系统有限公司 | Automobile door subwoofer |
| WO2020140167A1 (en) * | 2018-12-30 | 2020-07-09 | 瑞声科技（南京）有限公司 | Vehicle-mounted sound box and automobile |
| CN111385708A (en) * | 2018-12-31 | 2020-07-07 | 深圳纽斯声学系统有限公司 | Car sound system based on smart mobile phone |
| CN113596641A (en) * | 2021-07-30 | 2021-11-02 | 安徽江淮汽车集团股份有限公司 | Bass loudspeaker for automobile |
| CN113938802A (en) * | 2021-09-07 | 2022-01-14 | 联想(北京)有限公司 | Loudspeaker assembly and electronic equipment |
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| WO2018171440A1 (en) | 2018-09-27 |
| CN108632720A (en) | 2018-10-09 |
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