CN117156359B - Double-cone loudspeaker, assembly method thereof and automobile sound system - Google Patents
Double-cone loudspeaker, assembly method thereof and automobile sound system Download PDFInfo
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- CN117156359B CN117156359B CN202311422237.4A CN202311422237A CN117156359B CN 117156359 B CN117156359 B CN 117156359B CN 202311422237 A CN202311422237 A CN 202311422237A CN 117156359 B CN117156359 B CN 117156359B
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- 230000005236 sound signal Effects 0.000 description 7
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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
- H04R9/025—Magnetic circuit
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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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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The invention discloses a double-cone loudspeaker, an assembling method thereof and a car sound system. The speaker of this double cone includes: a basin stand, which is arranged in the middle and is provided with a first end part and a second end part which are opposite; a first cone having an outer edge connected to the first end; a first voice coil connected to the first cone; a first magnetic circuit for driving the first voice coil to reciprocate along a motion axis; a second cone having an outer edge connected to the second end, the second cone having a front face and a back face; a second voice coil connected to the second cone; a second magnetic circuit for driving the second voice coil to reciprocate along the movement axis; the back of the first cone and the back of the second cone are opposite to each other, the first magnetic circuit is arranged between the first cone and the second cone and connected to the basin frame, a mounting groove is formed in the first magnetic circuit, and the second magnetic circuit is arranged in the mounting groove of the first magnetic circuit. The loudspeaker can realize the function of the subwoofer without additionally configuring the box body, thereby saving space.
Description
Technical Field
The invention belongs to the field of automobile speakers, and relates to a double-cone speaker, an assembly method thereof and an automobile sound system.
Background
The automobile sound system is installed in an automobile and has the function of playing or replaying sound. The main components of the car audio system are speakers, which generally include tweeters, midrange speakers, woofers, and subwoofers. For speakers or subwoofers mounted on automobiles, reducing the space it occupies has been one of the goals of automobile sound system designers. The existing subwoofer needs to be provided with a larger cavity to meet the requirements of medium and low sound production. The mounting structure of a subwoofer as disclosed in patent CN203047053U, wherein the subwoofer is mounted on the left or right portion on the floor of a trunk of a vehicle, the subwoofer includes a case and a speaker mounted in the case, and a through hole is formed on an upper plate of the case so that sound of the speaker can be emitted outward through the through hole. The box includes the hypoplastron, upper plate, two curb plates and two end plates, two the curb plate respectively with the hypoplastron with upper plate fixed connection, two the end plate all with the hypoplastron upper plate, two curb plate fixed connection, thereby the hypoplastron upper plate, two curb plate and two the end plate forms confined cavity. The box body of the bass loudspeaker occupies larger space, has more severe requirements on the installation position, and mostly needs to be placed in larger vehicle space such as a trunk or a handrail box of an automobile.
Disclosure of Invention
The invention aims to provide a loudspeaker with double sound basins, which can realize the function of a bass loudspeaker without additionally configuring a box body, has the function of enhancing bass, and saves occupied space. The invention also provides an assembly method of the loudspeaker with the double sound basins and the automobile loudspeaker with the double sound basins, wherein the bass loudspeaker does not need to be additionally provided with a box body, the occupied space is small, and the assembly on an automobile is flexible.
The invention adopts a technical scheme as follows:
a dual cone speaker comprising:
a basin stand, which is arranged in the middle and is provided with a first end part and a second end part which are opposite;
a first cone having an outer edge connected to the first end, the first cone having a front face and a back face;
a first voice coil connected to the first cone;
a first magnetic circuit for driving the first voice coil to reciprocate along a motion axis;
a second cone having an outer edge connected to the second end, the second cone having a front face and a back face;
a second voice coil connected to the second cone; and
A second magnetic circuit for driving the second voice coil to reciprocate along the movement axis;
the back of the first cone and the back of the second cone are opposite to each other, the first magnetic circuit is arranged between the first cone and the second cone, the first magnetic circuit is connected with the cone frame, a mounting groove is formed in the first magnetic circuit, and the second magnetic circuit is arranged in the mounting groove of the first magnetic circuit.
In a preferred embodiment, the first end is sealed by the first cone and the second end is sealed by the second cone to form a cavity within the frame; the first voice coil, the first magnetic circuit, the second voice coil and the second magnetic circuit are all positioned in the accommodating cavity; the side wall of the basin frame is provided with air holes for communicating the accommodating cavity with the outside air.
In a preferred embodiment, the first magnetic circuit includes a first magnetic conduction bowl, and a first magnetic steel and a first front piece that are disposed in the first magnetic conduction bowl, wherein through holes are formed in the bottom of the first magnetic conduction bowl and at least one of the first magnetic steels, and the through holes are aligned to form all or a part of the mounting groove; the diameter of the first voice coil is larger than that of the second voice coil, and the aperture of the through hole is larger than that of the second voice coil and smaller than that of the first voice coil.
In a more preferred embodiment, through holes are formed in the bottom of the first magnetic conductive bowl, the first front piece and all the first magnetic steel, and each through hole is aligned to form the mounting groove.
In a more preferred embodiment, the second magnetic circuit is disposed in the through hole of the first magnetic conductive bowl and at least one through hole of the first magnetic steel.
In a further preferred embodiment, a magnetic shielding material is provided between the second magnetic circuit and the first front piece.
In a preferred embodiment, a magnetic shielding material is provided between the first magnetic circuit and the second magnetic circuit.
In a preferred embodiment, a first airflow hole is formed in the first voice coil to communicate the space inside and outside the first voice coil; a second airflow hole is formed in the second voice coil to communicate the space inside and outside the second voice coil.
In a preferred embodiment, the first voice coil is fixedly connected to the first cone through a first bracket, the first bracket is provided with a top part attached to the back surface of the first cone and a first flange extending downwards from the top part, and the top part of the first voice coil is sleeved on the first flange and fixedly connected; the second voice coil is fixedly connected to the second cone through a second support, the second support is provided with a bottom attached to the back surface of the second cone and a second flange extending upwards from the bottom, and the bottom of the second voice coil is sleeved on the second flange and fixedly connected.
In a preferred embodiment, the speaker further comprises a first positioning support, an inner edge of the first positioning support being fixed to the first voice coil and an outer edge being fixed to the basin stand; the loudspeaker further comprises a second positioning support piece, wherein the inner edge of the second positioning support piece is fixed on the second voice coil, and the outer edge of the second positioning support piece is fixed on the basin frame.
In a more preferred embodiment, the basin stand comprises an outer barrel and an inner barrel, the first cone and the second cone are respectively connected to two end parts of the outer barrel, and one or more ventilation holes are formed in the outer barrel; the inner cylinder is connected to the inner wall of the outer cylinder through a plurality of connecting ribs distributed at intervals, the first magnetic circuit is fixedly arranged in the inner cylinder, and the outer edge of the first positioning support piece and the outer edge of the second positioning support piece are respectively connected to two end parts of the inner cylinder; the diameter of the upper end part of the inner cylinder is larger than that of the lower end part of the inner cylinder.
In a preferred embodiment, the basin stand is provided with a first interface and a second interface; the lead wire of the first voice coil is electrically connected with the first interface, and the lead wire of the second voice coil is electrically connected with the second interface; or, the positive electrode lead of the first voice coil and the positive electrode lead of the second voice coil are electrically connected to the first interface, and the negative electrode lead of the first voice coil and the negative electrode lead of the second voice coil are electrically connected to the second interface; or, the lead wire of the first voice coil and the lead wire of the second voice coil are connected in series and then connected between the first interface and the second interface.
In a preferred embodiment, the first cone comprises a flat-plate-shaped first cone body, the second cone comprises a flat-plate-shaped second cone body, and the first cone body and the second cone body are parallel to each other and are perpendicular to the motion axis in an initial state.
The other technical scheme adopted by the invention is as follows:
a method of assembling a loudspeaker as described, comprising the steps of:
mounting the first magnetic circuit in an inner cylinder of the basin stand;
fixing the first voice coil on the first cone;
inserting the first voice coil into a first magnetic gap of the first magnetic circuit, and fixing an outer edge of the first cone on a first end of an outer cylinder of the cone frame;
the basin stand is turned up and down, and the second magnetic circuit is placed in the mounting groove of the first magnetic circuit;
fixing the second voice coil on the second cone;
the second voice coil is inserted into the second magnetic gap of the second magnetic circuit, and the outer edge of the second cone is fixed on the second end of the outer cylinder of the cone frame.
The invention adopts another technical scheme as follows:
a car sound system comprises a subwoofer, wherein the subwoofer adopts the loudspeaker.
Compared with the prior art, the invention has the following advantages:
the double-cone loudspeaker adopts two vibration systems, the two magnetic circuits are mutually nested, the double-cone loudspeaker has the effect of reinforcing heavy bass, has the function similar to a bass loudspeaker, has better performance in a low-audio frequency section, does not need to additionally arrange a box body, has compact structure, reduces occupied space, is suitable for being installed on an automobile as a bass loudspeaker of an automobile sound system, has lower requirements on installation positions and space, and is flexible and convenient to install.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is an exploded view of a speaker according to an embodiment of the present invention.
Fig. 2 is a top view of a speaker according to an embodiment of the present invention.
Fig. 3 is a cross-sectional view taken along the direction A-A in fig. 2.
Fig. 4 is a schematic diagram of a half structure of a speaker according to an embodiment of the present invention.
Fig. 5 is a partial enlarged view at a in fig. 4.
Fig. 6 is a partial enlarged view at B in fig. 4.
Fig. 7 is a schematic view of a half frame of a loudspeaker according to an embodiment of the invention.
Fig. 8 is a schematic diagram of cone vibration of a speaker according to embodiment 1 of the present invention.
Fig. 9 is a schematic diagram of cone vibration of a speaker according to embodiment 2 of the present invention.
Fig. 10 shows performance test curves for three speakers.
In the above figures of the drawings,
1. a basin stand; 11. an outer cylinder; 110. ventilation holes; 111. a first interface; 112. a second interface; 12. an inner cylinder; 13. a connecting rib;
2. a first cone; 21. a first cone body; 22. a first bracket; 221. a first flange;
3. a first voice coil; 31. a first airflow aperture; 32. a first lead;
4. a first magnetic circuit; 40. a first magnetic gap; 41. a first magnetically conductive bowl; 42. a first magnetic steel; 43. a first front panel; 44. a mounting groove; 440. a through hole;
5. a first positioning support piece;
6. a second cone; 61. a second cone body; 62. a second bracket; 621. a second flange;
7. a second voice coil; 71. a second airflow aperture; 72. a second lead; 721. a second flange;
8. a second magnetic circuit; 80. a second magnetic gap; 81. a second magnetic bowl; 82. a second magnetic steel; 83. a second front panel;
9. a second positioning support piece;
10. a magnetic shielding material.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art. The description of these embodiments is provided to assist understanding of the present invention, but is not intended to limit the present invention. In addition, technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
In the present invention, "inner" and "outer" are defined with reference to the center line of the voice coil, and are defined with reference to the direction closer to the center line of the voice coil, and vice versa. The azimuth words "up", "down", "horizontal" are intended to facilitate understanding of the structure of the speaker system by those skilled in the art, and are not intended to limit the state of the speaker after it is installed in a use scene. For example, the speakers may be mounted to a horizontal, inclined or vertical surface within the automobile.
Example 1
The embodiment provides a loudspeaker with double sound basins, which can realize the kinetic energy of a bass loudspeaker with smaller volume and has the sound effect of strengthening heavy bass. Referring to fig. 1 to 8, the speaker includes a frame 1 and two vibration systems installed in the frame 1. The first vibration system comprises a first cone 2, a first voice coil 3, a first magnetic circuit 4 and a first positioning support piece 5, and the second vibration system comprises a second cone 6, a second voice coil 7, a second magnetic circuit 8 and a second positioning support piece 9. Wherein, both vibration systems can vibrate and make sound after the electric signal is connected, and the second magnetic circuit 8 is arranged in the first magnetic circuit 4.
The frame 1 is arranged hollow and has opposite first and second ends, a first vibration system being arranged at the first end of the frame 1 and a second vibration system being arranged at the second end of the frame 1. Referring to fig. 6 and 7, the basin stand 1 includes an outer tub 11 and an inner tub 12, and the inner tub 12 is connected to an inner wall of the outer tub 11 by a plurality of connection ribs 13 arranged at intervals. The outer cylinder 11 has a hollow cylindrical shape as a whole, and the inner cylinder 12 has a tapered portion having a large upper portion and a small lower portion, and the diameter of the upper end portion of the inner cylinder 12 is larger than the diameter of the lower end portion thereof. The plurality of connection ribs 13 are arranged at equal intervals along the circumferential direction of the inner tube 12, and are radially connected between the outer tube 11 and the inner tube 12. The plurality of connecting ribs 13 are provided with intervals, the whole inner cylinder 12 is positioned in the outer cylinder 11, the height of the inner cylinder 12 is smaller than that of the outer cylinder 11, and the outer diameter of the inner cylinder 12 is smaller than the inner diameter of the outer cylinder 11. The outer tub 11 is provided with one or more ventilation holes 110 for communicating the space inside the tub 1 with the outside atmosphere.
As shown in fig. 3 and 4, the outer edge of the first cone 2 is fixedly connected to the first end of the tub 1 and closes the first end of the tub 1. Specifically, the outer edge of the first cone 2 is fixedly connected to the top end of the outer cylinder 11 of the cone frame 1. The first cone 2 has a front face facing the outside of the frame 1 and a back face facing the inside of the frame 1, in particular facing the top end of the inner cylinder 12. Further, the first cone 2 has a flat plate-shaped first cone body 21. The outer edge of the second cone 6 is fixedly connected to the second end of the cone frame 1 and closes the second end of the cone frame 1. Specifically, the outer edge of the second cone 6 is fixedly connected to the bottom end of the outer cylinder 11 of the cone frame 1. The second cone 6 has a front face facing the outside of the frame 1 and a back face facing the inside of the frame 1, in particular facing the bottom end of the inner cylinder 12. Further, the second cone 6 has a flat plate-shaped second cone body 61. The back of the first cone 2 and the back of the second cone 6 are opposite to each other, the first cone body 21 and the second cone body 61 are parallel to each other, and the inner cylinder 12 is located between the first cone 2 and the second cone 6. The first cone body 21 and the second cone body 61 are each perpendicular to the movement axis (specifically, the up-down direction in fig. 3) of the first voice coil 3 and/or the second voice coil 7 in the initial state.
The first voice coil 3 is connected to the first cone 2, and the first voice coil 3 has a pair of first leads 32 (including a positive electrode and a negative electrode) for receiving an audio signal. Specifically, as shown in fig. 5, the top end of the first voice coil 3 is fixedly connected to the middle part of the first cone 2 through a first bracket 22, the first bracket 22 has a top part attached to the back surface of the first cone 2 and a first flange 221 extending downwards at the top part, and the top part of the first voice coil 3 is sleeved outside the first flange 221 and fixedly connected, specifically, is bonded on the outer side surface of the first flange 221 through glue. The second voice coil 7 is connected to the second cone 6, and the second voice coil 7 has a pair of second leads 72 (including a positive electrode and a negative electrode) for receiving an audio signal. Specifically, as shown in fig. 6, the bottom end of the second voice coil 7 is fixedly connected to the middle part of the second cone 6 through a second bracket 62, the second bracket 62 has a bottom attached to the back surface of the second cone 6 and a second flange 621 extending upward from the bottom, and the bottom of the second voice coil 7 is sleeved outside the second flange 621 and fixedly connected, specifically, is adhered to the outer side surface of the second flange 621 through glue. The diameter of the first voice coil 3 is larger than the diameter of the second voice coil 7.
As shown in fig. 3 and 4, the first magnetic circuit 4 is disposed between the first cone 2 and the second cone 6, and the first magnetic circuit 4 is connected to the frame 1, specifically, disposed on the inner cylinder 12 of the frame 1. The first magnetic circuit 4 is for driving the first voice coil 3 to reciprocate along a movement axis, and the bottom end of the first voice coil 3 is inserted into the first magnetic gap 40 of the first magnetic circuit 4 from above. The first magnetic circuit 4 includes a first magnetic conductive bowl 41, a first magnetic steel 42 disposed in the first magnetic conductive bowl 41, and a first front piece 43. The first magnetic bowl 41 is fixedly disposed on the inner cylinder 12 and has a cavity with an open top, and the first magnetic steel 42 (the number may be plural) and the first front plate 43 are mutually laminated and fixed on the bottom wall of the first magnetic bowl 41. The first magnetic gap 40 is formed between the inner side surface of the first magnetic bowl 41, the first magnetic steel 42, and the outer side surface of the first front piece 43.
The second magnetic circuit 8 is for driving the second voice coil 7 to reciprocate along the above-described movement axis, and the top of the second voice coil 7 is inserted into the second magnetic gap 80 of the second magnetic circuit 8 from below. The second magnetic circuit 8 includes a second magnetic conductive bowl 81, a second magnetic steel 82 disposed in the second magnetic conductive bowl 81, and a second front piece 83. The second magnetic conduction bowl 81 has a cavity with an open bottom end, and the second magnetic steel 82 and the first front piece 43 are mutually laminated and fixed on the top wall of the first magnetic conduction bowl 41. The second magnetic gap 80 is formed between the inner side surface of the second magnetic bowl 81, the second magnetic steel 82, and the outer side surface of the second front piece 83.
The second magnetic circuit 8 is embedded in the first magnetic circuit 4. Wherein the first magnetic circuit 4 is provided with a mounting groove 44, and the second magnetic circuit 8 is provided in the mounting groove 44 of the first magnetic circuit 4. Further, as shown in fig. 3, 4 and 6, through holes 440 are formed in the bottom of the first magnetic conductive bowl 41 and at least one of the first magnetic steels 42, and all or a part of the mounting grooves 44 formed by aligning the through holes 440. Further, through holes 440 are formed in the bottom of the first magnetic conductive bowl 41, the first front piece 43 and all the first magnetic steels 42, the through holes 440 are aligned to form the mounting groove 44, and the second magnetic circuit 8 is disposed in the through hole 440 of the first magnetic conductive bowl 41 and at least one through hole 440 of the first magnetic steels 42. The diameter of the first voice coil 3 is larger than that of the second voice coil 7, and the aperture of the through hole 440 must be larger than that of the second voice coil 7 and smaller than that of the first voice coil 3.
A magnetic shielding material 10 is provided between the first magnetic circuit 4 and the second magnetic circuit 8. Specifically, in the present embodiment, the magnetic shield material 10 is disposed between the second magnetic circuit 8 and the first front piece 43. The magnetic shielding material 10 is selected from one or a combination of a plurality of plastics (such as PC), rubber, iron, cobalt, nickel, aluminum. At least the top of the second magnetic circuit 8 is provided with a magnetic shielding material 10 to avoid the magnetic fields of the first magnetic circuit 4 and the second magnetic circuit 8 to influence each other.
The inner edge of the first positioning support 5 is fixed on the first voice coil 3 and the outer edge is fixed on the frame 1. Specifically, the outer edge of the first positioning support 5 is fixedly connected to the top end of the inner cylinder 12. The inner edge of the second positioning support piece 9 is fixed on the second voice coil 7 and the outer edge is fixed on the basin frame 1. Specifically, the outer edge of the second positioning support piece 9 is fixedly connected to the bottom end of the inner cylinder 12. The first positioning support piece 5 and the second positioning support piece 9 are corrugated and have elasticity. The first and second positioning support pieces 5 and 9 prevent the first and second voice coils 3 and 7 from swinging in directions other than the intended directions, and restrict the first and second voice coils 3 and 7 from vibrating up and down substantially along the above-described movement axes.
The first end of the basin stand 1 is sealed by the first cone 2, and the second end is sealed by the second cone 6 to form a cavity in the basin stand 1. The first voice coil 3, the first magnetic circuit 4, the second voice coil 7 and the second magnetic circuit 8 are all positioned in the cavity, and the cavity is communicated with the outside air through a plurality of ventilation holes 110 on the side wall of the outer cylinder 11 of the basin frame 1. Further, a first air flow hole 31 is formed on the first voice coil 3 to communicate the space inside and outside the first voice coil 3; the second voice coil 7 is provided with a second air flow hole 71 for communicating the space inside and outside the second voice coil 7.
The outer cylinder 11 of the basin stand 1 is provided with a first interface 111 and a second interface 112, which can be configured in the form of female connectors. The pair of leads of the first voice coil 3 may be connected to the pair of bonding pads of the first interface 111, respectively, and the pair of leads of the second voice coil 7 may be connected to the pair of bonding pads of the second interface 112, respectively. When in operation, one or two of the first voice coil 3 and the second voice coil 7 can be selectively fed with audio signals, and corresponding operation modes can be selected according to requirements to realize different playing effects; when the two voice coils work, the first voice coil 3 and the second voice coil 7 are connected in parallel, and can be connected in series. In other embodiments, the following wire connection may also be employed: the positive electrode lead of the first voice coil 3 and the positive electrode lead of the second voice coil 7 are electrically connected and then connected to the first interface 111, and the negative electrode lead of the first voice coil 3 and the negative electrode lead of the second voice coil 7 are electrically connected and then connected to the second interface 112, that is, the first voice coil 3 and the second voice coil 7 are mutually connected in parallel. As shown in fig. 8, after the audio signal is connected, the first cone 2 and the second cone 6 vibrate up and down along the same movement axis, and the vibration directions of the two are shown by two arrows in fig. 8, so that the first cone 2 and the second cone 6 vibrate synchronously and reversely.
The embodiment also provides an assembling method of the loudspeaker, which comprises the following steps:
the first magnetic circuit 4 is arranged in the inner cylinder 12 of the basin stand 1;
fixing the first voice coil 3 on the first cone 2;
inserting the first voice coil 3 into the first magnetic gap 40 of the first magnetic circuit 4 and fixing the outer edge of the first cone 2 to the first end of the outer cylinder 11 of the cone frame 1;
the basin stand 1 is turned up and down, and the second magnetic circuit 8 is placed in the mounting groove 44 of the first magnetic circuit 4;
fixing the second voice coil 7 to the second cone 6;
the second voice coil 7 is inserted into the second magnetic gap 80 of the second magnetic circuit 8, and the outer edge of the second cone 6 is fixed to the second end of the outer cylinder 11 of the cone frame 1.
The embodiment also provides a car audio system, which comprises a subwoofer. The bass loudspeaker is directly assembled in the automobile, for example, the basin stand 1 of the loudspeaker can be locked and attached on the sheet metal part of the automobile through screws, and the additional arrangement of a box body is not needed.
Example 2
This embodiment is basically the same as embodiment 1, except that: the lead connection modes of the first voice coil 3 and the second voice coil 7 are different. Specifically, the first voice coil 3 and the second voice coil 7 are connected in series with each other. That is, the positive electrode lead of the first voice coil 3 and the negative electrode lead of the second voice coil 7 are electrically connected, and the negative electrode lead of the first voice coil 3 and the positive electrode lead of the second voice coil 7 are electrically connected to the audio input line, respectively, to be connected to the audio signal. Or, the negative electrode lead of the first voice coil 3 and the positive electrode lead of the second voice coil 7 are electrically connected, and the positive electrode lead of the first voice coil 3 and the negative electrode lead of the second voice coil 7 are respectively electrically connected to the audio input line so as to be connected with the audio signal. As shown in fig. 9, after the audio signal is connected, the first cone 2 and the second cone 6 vibrate up and down along the same movement axis respectively, and the vibration directions of the two are shown by two arrows in fig. 9, so that the first cone 2 and the second cone 6 vibrate synchronously and in the same direction.
Performance test:
performance tests were performed on the dual cone speaker, the normal woofer and the normal subwoofer of example 1, with performance curves dividedSee also fig. 10. Wherein the volume of the dual cone speaker of example 1 was 1.64×10 6 mm 3 The volume of a conventional woofer is 1.58×10 6 mm 3 The volume of the subwoofer is 1.4x10 7 mm 3 。
As can be seen from the frequency response curve of fig. 10, in the bass band of 40-100 hz, the SPL (sound pressure level) of the dual-cone speaker of embodiment 1 is significantly better than that of the common bass speaker, which is 2-3 dB higher than that of the common subwoofer on average. And compared with the common woofer which can only be assembled on the automobile door panel, the woofer can only be installed in the trunk, and the double-cone loudspeaker of the embodiment has no too much limit on the installation position and is flexibly configured on the automobile.
The double-cone loudspeaker of the embodiment adopts two vibration systems, the two magnetic circuits are mutually nested, the double-cone loudspeaker has the effect of strengthening heavy bass, has the function similar to a bass loudspeaker, has better performance in a low-audio frequency section, does not need to additionally configure a box body, has compact structure, reduces occupied space, is suitable for being installed on an automobile to be used as a bass loudspeaker of an automobile sound system, has lower requirements on installation positions and space, and is flexible and convenient to install.
As used in this specification and in the claims, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus.
It is further understood that the term "plurality" in this disclosure means two or more, and other adjectives are similar thereto.
It is further understood that the terms "first," "second," and the like are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the expressions "first", "second", etc. may be used entirely interchangeably. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.
The above-described embodiments are provided for illustrating the technical concept and features of the present invention, and are intended to be preferred embodiments for those skilled in the art to understand the present invention and implement the same according to the present invention, not to limit the scope of the present invention.
Claims (14)
1. A dual cone speaker, comprising:
a basin stand, which is arranged in the middle and is provided with a first end part and a second end part which are opposite;
a first cone having an outer edge connected to the first end, the first cone having a front face and a back face;
a first voice coil connected to the first cone;
a first magnetic circuit for driving the first voice coil to reciprocate along a movement axis, the first magnetic circuit having a first magnetic gap formed therein for insertion of the first voice coil;
a second cone having an outer edge connected to the second end, the second cone having a front face and a back face;
a second voice coil connected to the second cone; and
A second magnetic circuit for driving the second voice coil to reciprocate along the movement axis, the second magnetic circuit having a first magnetic gap formed therein for insertion of the second voice coil;
the back of the first cone and the back of the second cone are opposite to each other, the first magnetic circuit is arranged between the first cone and the second cone, the first magnetic circuit is connected with the cone frame, a mounting groove is formed in the first magnetic circuit, and the second magnetic circuit is arranged in the mounting groove of the first magnetic circuit; the basin stand comprises an outer barrel and an inner barrel, the first cone and the second cone are respectively connected to two end parts of the outer barrel, and one or more air holes for communicating the cavity in the basin stand with outside air are formed in the outer barrel; the inner cylinder is connected to the inner wall of the outer cylinder through a plurality of connecting ribs which are distributed at intervals, and the first magnetic circuit is fixedly arranged in the inner cylinder; the first voice coil is provided with a first air flow hole for communicating the space inside and outside the first voice coil, and the second voice coil is provided with a second air flow hole for communicating the space inside and outside the second voice coil;
a magnetic shielding material is disposed between the first magnetic circuit and the second magnetic circuit.
2. The loudspeaker of claim 1, wherein the first end is sealed by the first cone and the second end is sealed by the second cone to form the cavity within the frame; the first voice coil, the first magnetic circuit, the second voice coil and the second magnetic circuit are all located in the containing cavity.
3. The loudspeaker of claim 1, wherein the first magnetic circuit comprises a first magnetically conductive bowl, and a first magnetic steel and a first front piece arranged in the first magnetically conductive bowl, wherein through holes are formed in the bottom of the first magnetically conductive bowl and at least one of the first magnetic steel, and the through holes are aligned to form all or a part of the mounting groove; the diameter of the first voice coil is larger than that of the second voice coil, and the aperture of the through hole is larger than that of the second voice coil and smaller than that of the first voice coil.
4. The loudspeaker of claim 3, wherein the bottom of the first magnetically permeable bowl, the first front piece, and all of the first magnetic steel are each provided with a through hole, and each through hole is aligned to form the mounting groove.
5. The loudspeaker of claim 3 or 4, wherein the number of the first magnetic steels is two, the first front piece is located between the two first magnetic steels, and the second magnetic circuit is arranged in the through hole of the first magnetic conductive bowl and the through hole of at least one of the first magnetic steels.
6. The speaker of claim 5, wherein the magnetic shielding material is disposed between the second magnetic circuit and the first front piece.
7. The loudspeaker of claim 1, wherein the first voice coil is provided with a first air flow hole to communicate the space inside and outside the first voice coil; a second airflow hole is formed in the second voice coil to communicate the space inside and outside the second voice coil.
8. The loudspeaker of claim 1, wherein the first voice coil is fixedly connected to the first cone through a first bracket, the first bracket has a top portion attached to the back surface of the first cone and a first flange extending downward from the top portion, and the top portion of the first voice coil is sleeved on the first flange and fixedly connected; the second voice coil is fixedly connected to the second cone through a second support, the second support is provided with a bottom attached to the back surface of the second cone and a second flange extending upwards from the bottom, and the bottom of the second voice coil is sleeved on the second flange and fixedly connected.
9. The loudspeaker of claim 1, further comprising a first positioning tab having an inner edge secured to the first rim and an outer edge secured to the frame; the loudspeaker further comprises a second positioning support piece, wherein the inner edge of the second positioning support piece is fixed on the second voice coil, and the outer edge of the second positioning support piece is fixed on the basin frame.
10. The loudspeaker of claim 9, wherein the outer edge of the first positioning tab and the outer edge of the second positioning tab are connected to the two ends of the inner barrel, respectively; the diameter of the upper end part of the inner cylinder is larger than that of the lower end part of the inner cylinder.
11. The loudspeaker of claim 1, wherein the frame is provided with a first interface and a second interface; the lead wire of the first voice coil is electrically connected with the first interface, and the lead wire of the second voice coil is electrically connected with the second interface; or, the positive electrode lead of the first voice coil and the positive electrode lead of the second voice coil are electrically connected to the first interface, and the negative electrode lead of the first voice coil and the negative electrode lead of the second voice coil are electrically connected to the second interface; or, the lead wire of the first voice coil and the lead wire of the second voice coil are connected in series and then connected between the first interface and the second interface.
12. The speaker of claim 1 wherein the first cone comprises a planar first cone body and the second cone comprises a planar second cone body, the first cone body and the second cone body being parallel to each other and perpendicular to the axis of motion in an initial state.
13. A method of assembling a loudspeaker according to any one of claims 1 to 12, comprising the steps of:
mounting the first magnetic circuit in an inner cylinder of the basin stand;
fixing the first voice coil on the first cone;
inserting the first voice coil into a first magnetic gap of the first magnetic circuit, and fixing an outer edge of the first cone on a first end of an outer cylinder of the cone frame;
the basin stand is turned up and down, and the second magnetic circuit is placed in the mounting groove of the first magnetic circuit;
fixing the second voice coil on the second cone;
the second voice coil is inserted into the second magnetic gap of the second magnetic circuit, and the outer edge of the second cone is fixed on the second end of the outer cylinder of the cone frame.
14. A car audio system comprising a subwoofer employing a loudspeaker according to any one of claims 1 to 12.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311422237.4A CN117156359B (en) | 2023-10-31 | 2023-10-31 | Double-cone loudspeaker, assembly method thereof and automobile sound system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311422237.4A CN117156359B (en) | 2023-10-31 | 2023-10-31 | Double-cone loudspeaker, assembly method thereof and automobile sound system |
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| CN117156359A CN117156359A (en) | 2023-12-01 |
| CN117156359B true CN117156359B (en) | 2024-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311422237.4A Active CN117156359B (en) | 2023-10-31 | 2023-10-31 | Double-cone loudspeaker, assembly method thereof and automobile sound system |
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| US5408533A (en) * | 1993-12-13 | 1995-04-18 | Reiffin; Martin | Motional feedback speaker system with radially polarized magnet and underhung voice-coil |
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|---|---|
| CN117156359A (en) | 2023-12-01 |
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