Loudspeaker having double cones and assembly method therefor, and car audio system

Abstract

A loudspeaker having double cones and an assembly method therefor, and a car audio system. The loudspeaker having double cones comprises: a basket, which is hollow and has a first end and a second end opposite to each other; a first cone, the outer edge of which is connected to the first end; a first voice coil, which is connected to the first cone; a first magnetic circuit, which is used for driving the first voice coil to reciprocate along a motion axis; a second cone, the outer edge of which is connected to the second end, wherein the second cone has a front surface and a back surface; a second voice coil, which is connected to the second cone; and a second magnetic circuit, which is used for driving the second voice coil to reciprocate along the motion axis, wherein the back surface of the first cone and the back surface of the second cone are arranged directly opposite to each other, the first magnetic circuit is arranged between the first cone and the second cone, the first magnetic circuit is connected to the basket, a mounting space is formed in the first magnetic circuit, and the second magnetic circuit is arranged in the mounting space of the first magnetic circuit. The loudspeaker achieves the function of a subwoofer without an additional cabinet, thus saving space.

Description

Loudspeaker with double cones, assembly method thereof, and car audio system Related applications

[0001] This application claims priority to Chinese patent application No. CN 2023114222374, filed on October 31, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the field of loudspeakers, and in particular to a loudspeaker with dual cones, an assembly method thereof, and a car audio system. Background Art

[0003] Car audio systems are installed in vehicles and are responsible for reproducing sound. The primary components of a car audio system are speakers, typically including tweeters, mid-range speakers, woofers, and subwoofers. Minimizing the space occupied by car speakers or subwoofers has always been a goal for car audio system designers. However, current subwoofers require a relatively large cavity to produce the required mid- and low-pitched sounds.

[0004] For example, the subwoofer installation structure disclosed in patent CN203047053U, wherein the subwoofer is installed on the left or right part of the bottom plate of the vehicle trunk, and the subwoofer includes a box and a speaker, and the speaker is installed in the box, and a through hole is formed on the upper plate of the box so that the sound of the speaker can be emitted outward through the through hole. The box includes a lower plate, an upper plate, two side plates and two end plates, and the two side plates are fixedly connected to the lower plate and the upper plate respectively, and the two end plates are fixedly connected to the lower plate, the upper plate, and the two side plates, thereby forming a closed cavity with the lower plate, the upper plate, the two side plates and the two end plates. The box of this type of subwoofer takes up a large space and has more stringent requirements on the installation location. Most of them need to be placed in a larger space inside the car, such as the trunk or armrest box of the car. Summary of the Invention

[0005] The present disclosure relates to a speaker with dual cones that functions as a subwoofer without an additional enclosure, enhancing bass while saving space. The present disclosure also provides an assembly method for the speaker with dual cones. The present disclosure further relates to a car audio system in which the subwoofer does not require an additional enclosure, occupies a small space, and is more flexible for installation in the car.

[0006] In a first aspect, the present disclosure provides a speaker having a dual-cone structure, comprising:

[0007] a basin frame, which is hollow and has a first end and a second end opposite to each other;

[0008] a first cone having an outer edge connected to the first end, the first cone having a front face and a back face;

[0009] a first voice coil connected to the first cone;

[0010] a first magnetic circuit for driving the first voice coil to reciprocate along a motion axis, wherein a first magnetic gap is formed inside the first magnetic circuit for the first voice coil to be inserted into;

[0011] a second cone having an outer edge connected to the second end, the second cone having a front face and a back face;

[0012] a second voice coil connected to the second cone; and

[0013] a second magnetic circuit for driving the second voice coil to reciprocate along the motion axis, wherein a second magnetic gap is formed inside the second magnetic circuit for the second voice coil to be inserted into;

[0014] Among them, the back side of the first sound cone and the back side of the second sound cone are arranged opposite to each other, the first magnetic circuit is arranged between the first sound cone and the second sound cone, the first magnetic circuit is connected to the basin frame, an installation groove is provided in the first magnetic circuit, and the second magnetic circuit is arranged in the installation groove of the first magnetic circuit.

[0015] The speaker has at least one of the following features:

[0016] By setting up two magnetic circuits, and providing magnetic shielding material between the two magnetic circuits and forming a magnetic gap in each magnetic circuit, the two voice coils are driven independently, thereby achieving the vibration of the two sound cones and achieving the effect of strengthening the heavy bass, thus being able to have a function similar to a subwoofer;

[0017] The integrated basin frame can be used to conveniently install the magnetic circuit. That is, after the first magnetic circuit is fixed on the inner cylinder and the voice coil and the sound cone corresponding to the first magnetic circuit are installed, the basin frame can be turned upside down and the second magnetic circuit is installed in the installation hole of the first magnetic circuit. Then, the voice coil and the sound cone corresponding to the first magnetic circuit are installed. The assembly is convenient and easy to implement, and the structure itself is compact, which reduces the space occupied. It is suitable for installation in a car as a subwoofer of a car audio system, and has low requirements on the installation position and space, and is more flexible and convenient to install; or

[0018] An air vent is provided on the outer tube of the basin frame, a first air flow hole is provided on the first voice coil to connect the space inside and outside the first voice coil, and a second air flow hole is provided on the second voice coil to connect the space inside and outside the second voice coil. The entire inner cavity in the basin frame can be connected to the outside world to allow air flow exchange, thereby avoiding large distortion caused by the air flow sound in the closed cavity at a certain frequency. Moreover, this setting of the present application is conducive to heat dissipation and helps to reduce distortion. In particular, the speaker of the present application that requires a large driving force needs to consider the heat dissipation problem.

[0019] In one embodiment, the first end is sealed by the first cone, and the second end is sealed by the second cone to form a cavity in the cone frame; the first voice coil, the first magnetic circuit, the second voice coil and the second magnetic circuit are all located in the cavity.

[0020] In one embodiment, the first end is sealed by the first sound cone, and the second end is sealed by the second sound cone to form a cavity in the basin frame; a vent hole is provided on the side wall of the basin frame to connect the cavity with the outside air.

[0021] In one embodiment, the first magnetic circuit includes a first magnetic bowl, a first magnet and a first front plate arranged in the first magnetic bowl, and through holes are opened on the bottom of the first magnetic bowl and at least one of the first magnets, and the through holes are aligned to form all or part of the mounting groove; the diameter of the first voice coil is larger than the diameter of the second voice coil, and the aperture of the through hole is larger than the diameter of the second voice coil and smaller than the diameter of the first voice coil.

[0022] In one embodiment, through holes are formed on the bottom of the first magnetic bowl, the first front plate, and all of the first magnetic steels, and the through holes are aligned to form the mounting slot.

[0023] In one embodiment, the second magnetic circuit is disposed in the through hole of the first magnetic bowl and the through hole of at least one of the first magnetic steels.

[0024] In one embodiment, a magnetic shielding material is provided between the second magnetic circuit and the first front plate.

[0025] In one embodiment, the number of the first magnetic steels is two, and the first front piece is located between the two first magnetic steels. The number of the second magnetic steels is two, and the second front piece is located between the two second magnetic steels.

[0026] In one embodiment, a magnetic shielding material is provided between the first magnetic circuit and the second magnetic circuit.

[0027] In one embodiment, a first air flow hole is formed on the first voice coil to connect the space inside and outside the first voice coil; and a second air flow hole is formed on the second voice coil to connect the space inside and outside the second voice coil.

[0028] In one embodiment, the first voice coil is fixedly connected to the first sound cone via a first bracket, the first bracket having a top fitted on the back of the first sound cone and a first flange extending downward from the top, the top of the first voice coil is sleeved on the first flange and fixedly connected; the second voice coil is fixedly connected to the second sound cone via a second bracket, the second bracket having a bottom fitted on the back of the second sound cone and a second flange extending upward from the bottom, the bottom of the second voice coil is sleeved on the second flange and fixedly connected.

[0029] In one embodiment, the speaker further includes a first positioning support, the inner edge of the first positioning support is fixed to the first voice coil and the outer edge is fixed to the basin frame; the speaker further includes a second positioning support, the inner edge of the second positioning support is fixed to the second voice coil and the outer edge is fixed to the basin frame.

[0030] In one embodiment, the basin frame includes an outer tube and an inner tube, the first sound cone and the second sound cone are respectively connected to the two ends of the outer tube, and the outer tube is provided with one or more air holes; the inner tube is connected to the inner wall of the outer tube via a plurality of spaced connecting ribs, the first magnetic circuit is fixedly arranged in the inner tube, the outer edge of the first positioning support piece and the outer edge of the second positioning support piece are respectively connected to the two ends of the inner tube; the diameter of the upper end of the inner tube is larger than the diameter of its lower end.

[0031] In one embodiment, the basin frame includes an outer tube and an inner tube, the first sound cone and the second sound cone are respectively connected to the two ends of the outer tube, the first end is sealed by the first sound cone, and the second end is sealed by the second sound cone to form a cavity in the basin frame; the outer tube is provided with one or more air holes connecting the cavity with the outside air; the inner tube is connected to the inner wall of the outer tube through a plurality of spaced connecting ribs, and the first magnetic circuit is fixedly arranged in the inner tube; the first voice coil is provided with a first air flow hole to connect the space inside and outside the first voice coil, and the second voice coil is provided with a second air flow hole to connect the space inside and outside the second voice coil.

[0032] In one embodiment, a first interface and a second interface are provided on the basin frame; a lead of the first voice coil is electrically connected to the first interface, and a lead of the second voice coil is electrically connected to the second interface.

[0033] In one embodiment, a first interface and a second interface are provided on the basin frame; the positive lead of the first voice coil and the positive lead of the second voice coil are electrically connected to the first interface, and the negative lead of the first voice coil and the negative lead of the second voice coil are electrically connected to the second interface.

[0034] In one embodiment, a first interface and a second interface are provided on the basin frame, and 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.

[0035] In one embodiment, the first cone includes a flat first cone body, the second cone includes a flat second cone body, the first cone body and the second cone body are parallel to each other and perpendicular to the movement axis in an initial state.

[0036] In a second aspect, the present disclosure provides a method for assembling the loudspeaker, comprising the following steps:

[0037] Installing the first magnetic circuit in the inner cylinder of the basin frame;

[0038] Fixing the first voice coil on the first cone;

[0039] Inserting the first voice coil into the first magnetic gap of the first magnetic circuit, and fixing the outer edge of the first cone to the first end of the outer tube of the cone frame;

[0040] Turn the basin frame upside down and place the second magnetic circuit in the installation groove of the first magnetic circuit;

[0041] fixing the second voice coil on the second cone;

[0042] 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 to the second end of the outer tube of the basin frame.

[0043] In a third aspect, the present disclosure provides a car audio system, including a subwoofer, wherein the subwoofer adopts the above-mentioned speaker.

[0044] The speaker with dual cones disclosed herein adopts two vibration systems, and the two magnetic circuits are nested with each other, which has the effect of enhancing heavy bass and has functions similar to those of a subwoofer. While having better performance in the low frequency band, it does not require an additional cabinet and has a compact structure, which reduces the space occupied. It is suitable for installation in a car as a subwoofer for a car audio system, and has low requirements for the installation position and space, making installation more flexible and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solution of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0046] FIG1 is an exploded view of a speaker according to an embodiment of the present disclosure.

[0047] FIG2 is a top view of a loudspeaker according to an embodiment of the present disclosure.

[0048] FIG3 is a cross-sectional view taken along line AA in FIG2 .

[0049] FIG4 is a schematic diagram of a half structure of a speaker according to an embodiment of the present disclosure.

[0050] FIG5 is a partial enlarged view of point A in FIG4 .

[0051] FIG6 is a partial enlarged view of point B in FIG4 .

[0052] FIG7 is a schematic diagram of a half basin frame of a speaker according to an embodiment of the present disclosure.

[0053] FIG8 is a schematic diagram of the vibration of the cone of the speaker according to Embodiment 1 of the present disclosure.

[0054] FIG9 is a schematic diagram of the vibration of the cone of the speaker according to Embodiment 2 of the present disclosure.

[0055] FIG10 shows the performance test curves of three loudspeakers.

[0056] In the above figures,

[0057] 1 - basin frame; 11 - outer tube; 110 - vent hole; 111 - first interface; 112 - second interface; 12 - inner tube; 13 - connecting rib;

[0058] 2 - first sound basin; 21 - first sound basin body; 22 - first bracket; 221 - first flange;

[0059] 3 - first voice coil; 31 - first air flow hole; 32 - first lead wire;

[0060] 4 - first magnetic circuit; 40 - first magnetic gap; 41 - first magnetic bowl; 42 - first magnetic steel; 43 - first front plate; 44 - mounting slot; 440 - through hole;

[0061] 5 - First positioning bracket;

[0062] 6 - second sound basin; 61 - second sound basin body; 62 - second bracket; 621 - second flange;

[0063] 7 - second voice coil; 71 - second air flow hole; 72 - second lead wire; 721 - second flange;

[0064] 8 - second magnetic circuit; 80 - second magnetic gap; 81 - second magnetic bowl; 82 - second magnetic steel; 83 - second front plate;

[0065] 9 - Second positioning bracket;

[0066] 10 - Magnetic shielding materials. DETAILED DESCRIPTION

[0067] The preferred embodiments of the present disclosure are described in detail below with reference to the accompanying drawings to make the advantages and features of the present disclosure more easily understood by those skilled in the art. It should be noted that the descriptions of these embodiments are intended to facilitate understanding of the present disclosure and do not constitute a limitation of the present disclosure. In addition, the technical features involved in the various embodiments of the present disclosure described below may be combined with each other as long as they do not conflict with each other.

[0068] In this disclosure, the terms "inside" and "outside" are defined relative to the centerline of the voice coil, with the direction closer to the centerline considered inside and the direction farther away from it considered outside. The directional terms "upper," "lower," and "horizontal" are intended to facilitate understanding of the structure of a loudspeaker system and are not intended to define the position of the loudspeaker after installation. For example, a loudspeaker can be mounted on a horizontal, inclined, or vertical surface in a car.

[0069] This embodiment provides a loudspeaker with a dual-cone sound basin, which can realize the kinetic energy of a subwoofer in a smaller volume and has the effect of enhancing the sound of heavy bass. Figures 1 to 8 show an example of a loudspeaker with a dual-cone sound basin. Referring to Figures 1 to 8, the loudspeaker includes a basin frame 1 and two vibration systems installed in the basin frame 1. The first vibration system includes a first cone sound basin 2, a first voice coil 3, a first magnetic circuit 4 and a first positioning support plate 5, and the second vibration system includes a second cone sound basin 6, a second voice coil 7, a second magnetic circuit 8 and a second positioning support plate 9. Among them, both vibration systems can vibrate and emit sound after receiving an electrical signal, and the second magnetic circuit 8 is arranged in the first magnetic circuit 4.

[0070] The basin frame 1 is hollow and has opposing first and second ends. The first vibration system is located at the first end of the basin frame 1, and the second vibration system is located at the second end. As shown in Figures 6 and 7 , the basin frame 1 comprises an outer tube 11 and an inner tube 12. The inner tube 12 is connected to the inner wall of the outer tube 11 via multiple spaced connecting ribs 13. The outer tube 11 is generally hollow and cylindrical. The inner tube 12 has a tapered portion that is larger at the top and smaller at the bottom. The diameter of the upper end of the inner tube 12 is larger than that of the lower end. Multiple connecting ribs 13 are evenly spaced along the circumference of the inner tube 12 and radially connect the outer and inner tubes 11 and 12. The multiple connecting ribs 13 are spaced apart. The inner tube 12 is entirely located within the outer tube 11. The height of the inner tube 12 is smaller than that of the outer tube 11, and the outer diameter of the inner tube 12 is smaller than the inner diameter of the outer tube 11. The outer tube 11 has one or more air vents 110 that connect the space within the basin frame 1 to the outside atmosphere.

[0071] As shown in Figures 3 and 4, the outer edge of the first sound cone 2 is fixedly connected to the first end of the basin frame 1 and closes the first end of the basin frame 1. Specifically, the outer edge of the first sound cone 2 is fixedly connected to the top of the outer tube 11 of the basin frame 1. The first sound cone 2 has a front and a back, the front facing the outside of the basin frame 1, and the back facing the inside of the basin frame 1, specifically facing the top of the inner tube 12. Further, the first sound cone 2 has a flat first sound cone body 21. The outer edge of the second sound cone 6 is fixedly connected to the second end of the basin frame 1 and closes the second end of the basin frame 1. Specifically, the outer edge of the second sound cone 6 is fixedly connected to the bottom end of the outer tube 11 of the basin frame 1. The second sound cone 6 has a front and a back, the front facing the outside of the basin frame 1, and the back facing the inside of the basin frame 1, specifically facing the bottom end of the inner tube 12. Further, the second sound cone 6 has a flat second sound cone body 61. The back of the first cone 2 and the back of the second cone 6 are arranged opposite each other, the first cone body 21 and the second cone body 61 are parallel to each other, and the inner tube 12 is located between the first cone 2 and the second cone 6. In the initial state, the first cone body 21 and the second cone body 61 are both perpendicular to the movement axis of the first voice coil 3 and / or the second voice coil 7 (specifically, the vertical direction in Figure 3).

[0072] The first voice coil 3 is connected to the first cone 2 and has a pair of first leads 32 (including a positive and negative poles) for receiving audio signals. Specifically, as shown in Figure 5, the top of the first voice coil 3 is fixedly connected to the center of the first cone 2 via a first bracket 22. The first bracket 22 has a top portion that fits against the back of the first cone 2 and a first flange 221 extending downward from the top. The top of the first voice coil 3 is inserted over the first flange 221 and fixedly attached, specifically by gluing it to the outer surface of the first flange 221. The second voice coil 7 is connected to the second cone 6 and has a pair of second leads 72 (including a positive and negative poles) for receiving audio signals. Specifically, as shown in Figure 6, the bottom end of the second voice coil 7 is fixedly connected to the middle of the second cone 6 via a second bracket 62. The second bracket 62 has a bottom portion that fits against the back of the second cone 6 and a second flange 621 extending upward from the bottom portion. The bottom portion of the second voice coil 7 is inserted outside the second flange 621 and fixedly connected, specifically by gluing it to the outer surface of the second flange 621. The diameter of the first voice coil 3 is larger than that of the second voice coil 7.

[0073] As shown in Figures 3 and 4 , the first magnetic circuit 4 is disposed between the first cone 2 and the second cone 6. The first magnetic circuit 4 is connected to the basin frame 1 and is specifically disposed on the inner cylinder 12 of the basin frame 1. The first magnetic circuit 4 is used to drive the first voice coil 3 to reciprocate along a motion axis. The bottom end of the first voice coil 3 is inserted from above into the first magnetic gap 40 of the first magnetic circuit 4. The first magnetic circuit 4 includes a first magnetic bowl 41 and a first magnet 42 and a first front piece 43 disposed within the first magnetic bowl 41. The first magnetic bowl 41 is fixedly placed on the inner cylinder 12 and has a cavity with an open top. The first magnet 42 (the number may be multiple) and the first front piece 43 are stacked and fixed to each other and fixed to the bottom wall of the first magnetic bowl 41. The first magnetic gap 40 is formed between the inner surface of the first magnetic bowl 41 and the outer surfaces of the first magnet 42 and the first front piece 43.

[0074] The second magnetic circuit 8 is used to drive the second voice coil 7 to reciprocate along the above-mentioned motion axis, and the top of the second voice coil 7 is inserted from the bottom into the second magnetic gap 80 of the second magnetic circuit 8. The second magnetic circuit 8 includes a second magnetic bowl 81 and a second magnetic steel 82 and a second front plate 83 disposed in the second magnetic bowl 81. The second magnetic bowl 81 has a cavity with an open bottom end. The second magnetic steel 82 and the first front plate 43 are stacked and fixed to each other and fixed to the top wall of the first magnetic bowl 41. The second magnetic gap 80 is formed between the inner surface of the second magnetic bowl 81 and the outer surfaces of the second magnetic steel 82 and the second front plate 83.

[0075] The second magnetic circuit 8 is embedded in the first magnetic circuit 4. A mounting groove 44 is provided in the first magnetic circuit 4, and the second magnetic circuit 8 is disposed in the mounting groove 44 of the first magnetic circuit 4. Furthermore, as shown in Figures 3, 4, and 6, a through hole 440 is provided on the bottom of the first magnetic bowl 41 and on at least one first magnetic steel 42. The through holes 440 align to form all or part of the mounting groove 44. Furthermore, a through hole 440 is provided on the bottom of the first magnetic bowl 41, the first front plate 43, and all the first magnetic steels 42. The through holes 440 align to form the aforementioned mounting groove 44. The second magnetic circuit 8 is disposed in the through hole 440 of the first magnetic bowl 41 and the through hole 440 of at least one first magnetic steel 42. The diameter of the first voice coil 3 is greater than the diameter of the second voice coil 7. The aperture of the through hole 440 must be greater than the diameter of the second voice coil 7 and smaller than the diameter of the first voice coil 3.

[0076] A magnetic shielding material 10 is disposed between the first magnetic circuit 4 and the second magnetic circuit 8. Specifically, in this embodiment, the magnetic shielding material 10 is disposed between the second magnetic circuit 8 and the first front plate 43. The magnetic shielding material 10 is selected from a combination of one or more of plastic (e.g., PC), rubber, iron, cobalt, nickel, and aluminum. The magnetic shielding material 10 is disposed on at least the top of the second magnetic circuit 8 to prevent the magnetic fields of the first magnetic circuit 4 and the second magnetic circuit 8 from interfering with each other.

[0077] The inner edge of the first positioning support 5 is fixed to the first voice coil 3, while the outer edge is fixed to the frame 1. Specifically, the outer edge of the first positioning support 5 is fixedly connected to the top of the inner tube 12. The inner edge of the second positioning support 9 is fixed to the second voice coil 7, while the outer edge is fixed to the frame 1. Specifically, the outer edge of the second positioning support 9 is fixedly connected to the bottom of the inner tube 12. The first and second positioning supports 5 and 9 are corrugated and elastic. The first and second positioning supports 5 and 9 prevent the first and second voice coils 3 and 7 from shaking in directions other than the intended direction, limiting the vertical vibration of the first and second voice coils 3 and 7 essentially along the aforementioned axis of motion.

[0078] The first end of the frame 1 is sealed by the first cone 2, and the second end is sealed by the second cone 6, forming a cavity within the frame 1. The first voice coil 3, first magnetic circuit 4, second voice coil 7, and second magnetic circuit 8 are all located within this cavity. Multiple air holes 110 in the sidewall of the outer tube 11 of the frame 1 connect the cavity to the outside air. Furthermore, the first voice coil 3 is provided with a first airflow hole 31 to connect the interior and exterior of the first voice coil 3; the second voice coil 7 is provided with a second airflow hole 71 to connect the interior and exterior of the second voice coil 7.

[0079] The outer tube 11 of the frame 1 is provided with a first interface 111 and a second interface 112, which can be configured as female connectors. The pair of leads of the first voice coil 3 can be connected to a pair of solder tabs on the first interface 111, and the pair of leads of the second voice coil 7 can be connected to a pair of solder tabs on the second interface 112. During operation, audio signals can be selectively fed to one or both of the first and second voice coils 3 and 7, and the corresponding operating mode can be selected according to needs to achieve different playback effects. When both voice coils are operating, the first and second voice coils 3 and 7 are connected in parallel or in series. In other embodiments, the following lead connection method can be adopted: the positive lead of the first voice coil 3 and the positive lead of the second voice coil 7 are electrically connected and then connected to the first interface 111, and the negative lead of the first voice coil 3 and the negative lead of the second voice coil 7 are electrically connected and then connected to the second interface 112, that is, the first and second voice coils 3 and 7 are connected in parallel. As shown in FIG8 , after receiving the audio signal, the first cone 2 and the second cone 6 vibrate up and down along the same axis of motion respectively, and the vibration directions of the two are shown by the two arrows in FIG8 , and the first cone 2 and the second cone 6 vibrate synchronously and in opposite directions.

[0080] This embodiment further provides a method for assembling the above-mentioned loudspeaker, comprising the following steps:

[0081] The first magnetic circuit 4 is installed in the inner cylinder 12 of the basin frame 1;

[0082] Fix the first voice coil 3 on the first cone 2;

[0083] Insert the first voice coil 3 into the first magnetic gap 40 of the first magnetic circuit 4, and fix the outer edge of the first cone 2 to the first end of the outer cylinder 11 of the basin frame 1;

[0084] Turn the basin frame 1 upside down and place the second magnetic circuit 8 in the mounting groove 44 of the first magnetic circuit 4;

[0085] Fix the second voice coil 7 on the second cone 6;

[0086] 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 basin frame 1 .

[0087] This embodiment also provides a car audio system including a subwoofer. The subwoofer uses the above-mentioned speaker, which is directly installed in the car. For example, the speaker frame 1 can be screwed to the car's sheet metal without the need for an additional box.

[0088] Figure 9 shows an example of another speaker according to this embodiment, in which the lead connection method of the first voice coil 3 and the second voice coil 7 is different. Specifically, the first voice coil 3 and the second voice coil 7 are connected in series. That is, the positive lead of the first voice coil 3 and the negative lead of the second voice coil 7 are electrically connected, and the negative lead of the first voice coil 3 and the positive lead of the second voice coil 7 are respectively electrically connected to the audio input line to receive the audio signal. Alternatively, the negative lead of the first voice coil 3 and the positive lead of the second voice coil 7 are electrically connected, and the positive lead of the first voice coil 3 and the negative lead of the second voice coil 7 are respectively electrically connected to the audio input line to receive the audio signal. As shown in Figure 9, after the audio signal is received, the first cone 2 and the second cone 6 respectively vibrate up and down along the same axis of motion, and the vibration directions of the two are shown by the two arrows in Figure 9. The first cone 2 and the second cone 6 vibrate synchronously and in the same direction.

[0089] Performance testing:

[0090] The dual-cone speakers shown in Figures 1 to 8, a common woofer, and a common subwoofer were tested for performance, and the performance curves are shown in Figure 10. The volume of the dual-cone speakers shown in Figures 1 to 8 is 1.64×10 6 mm 3 The volume of an ordinary woofer is 1.58×10 6 mm 3 The volume of the subwoofer is 1.4×10 7 mm 3 .

[0091] The frequency response curve in Figure 10 shows that within the 40-100 Hz bass band, the dual-cone speakers shown in Figures 1 through 8 achieve significantly better SPL (sound pressure level) than conventional subwoofers, achieving an average SPL of 2-3 dB higher than that of conventional subwoofers. Furthermore, while conventional subwoofers are typically confined to vehicle door panels and subwoofers are typically installed in the trunk, the dual-cone speakers of this embodiment offer a wider range of mounting options, allowing for greater flexibility in vehicle configuration.

[0092] The dual-cone loudspeaker of this embodiment adopts two vibration systems, and the two magnetic circuits are nested with each other, which has the effect of enhancing heavy bass and has functions similar to a subwoofer. While having better performance in the low frequency band, it does not require an additional cabinet. Moreover, the structure itself is compact, which reduces the space occupied. It is suitable for installation in a car as a subwoofer of a car audio system, and has low requirements for the installation position and space, and the installation is more flexible and convenient.

[0093] Features of embodiments of the present disclosure are set forth in the following clauses:

[0094] A double-cone loudspeaker, comprising:

[0095] a basin frame, which is hollow and has a first end and a second end opposite to each other;

[0096] a first cone having an outer edge connected to the first end, the first cone having a front face and a back face;

[0097] a first voice coil connected to the first cone;

[0098] a first magnetic circuit for driving the first voice coil to reciprocate along a motion axis;

[0099] a second cone having an outer edge connected to the second end, the second cone having a front face and a back face;

[0100] a second voice coil connected to the second cone; and

[0101] a second magnetic circuit for driving the second voice coil to reciprocate along the motion axis;

[0102] Among them, the back side of the first sound cone and the back side of the second sound cone are arranged opposite to each other, the first magnetic circuit is arranged between the first sound cone and the second sound cone, the first magnetic circuit is connected to the basin frame, an installation groove is provided in the first magnetic circuit, and the second magnetic circuit is arranged in the installation groove of the first magnetic circuit.

[0103] The loudspeaker according to clause 1, wherein the first end is sealed by the first sound cone, and the second end is sealed by the second sound cone, so as to form a cavity in the basin frame; the first voice coil, the first magnetic circuit, the second voice coil and the second magnetic circuit are all located in the cavity; and an air vent is provided on the side wall of the basin frame to connect the cavity with the outside air.

[0104] The loudspeaker according to clause 1, wherein the first magnetic circuit includes a first magnetic bowl, a first magnet and a first front plate arranged in the first magnetic bowl, a through hole is opened on the bottom of the first magnetic bowl and at least one of the first magnets, and the through holes are aligned to form all or part of the mounting groove; the diameter of the first voice coil is larger than the diameter of the second voice coil, and the aperture of the through hole is larger than the diameter of the second voice coil and smaller than the diameter of the first voice coil.

[0105] The speaker according to clause 3, wherein through holes are provided on the bottom of the first magnetic bowl, the first front piece and all of the first magnetic steels, and the through holes are aligned to form the mounting groove.

[0106] The loudspeaker according to clause 3 or 4, wherein the second magnetic circuit is arranged in the through hole of the first magnetic bowl and the through hole of at least one of the first magnetic steels.

[0107] The loudspeaker according to clause 5, wherein a magnetic shielding material is provided between the second magnetic circuit and the first front piece.

[0108] The loudspeaker according to clause 1, wherein a magnetic shielding material is provided between the first magnetic circuit and the second magnetic circuit.

[0109] The loudspeaker according to clause 1, wherein a first air flow hole is formed on the first voice coil to connect the space inside and outside the first voice coil; and a second air flow hole is formed on the second voice coil to connect the space inside and outside the second voice coil.

[0110] The loudspeaker according to clause 1, wherein the first voice coil is fixedly connected to the first sound cone via a first bracket, the first bracket having a top fitted on the back of the first sound cone and a first flange extending downward from the top, the top of the first voice coil is sleeved on the first flange and fixedly connected; the second voice coil is fixedly connected to the second sound cone via a second bracket, the second bracket having a bottom fitted on the back of the second sound cone and a second flange extending upward from the bottom, the bottom of the second voice coil is sleeved on the second flange and fixedly connected.

[0111] The loudspeaker according to clause 1, wherein the loudspeaker further comprises a first positioning support, wherein the inner edge of the first positioning support is fixed to the first voice coil and the outer edge is fixed to the basin frame; the loudspeaker further comprises a second positioning support, wherein the inner edge of the second positioning support is fixed to the second voice coil and the outer edge is fixed to the basin frame.

[0112] The loudspeaker according to clause 10, wherein the basin frame includes an outer tube and an inner tube, the first sound cone and the second sound cone are respectively connected to the two ends of the outer tube, and the outer tube has one or more air holes; the inner tube is connected to the inner wall of the outer tube through a plurality of spaced connecting ribs, the first magnetic circuit is fixedly arranged in the inner tube, the outer edge of the first positioning support piece and the outer edge of the second positioning support piece are respectively connected to the two ends of the inner tube; the diameter of the upper end of the inner tube is larger than the diameter of the lower end thereof.

[0113] The loudspeaker according to clause 1, wherein a first interface and a second interface are provided on the basin; the lead of the first voice coil is electrically connected to the first interface, and the lead of the second voice coil is electrically connected to the second interface; or, the positive lead of the first voice coil and the positive lead of the second voice coil are electrically connected to the first interface, and the negative lead of the first voice coil and the negative lead of the second voice coil are electrically connected to the second interface; or, the lead of the first voice coil and the lead of the second voice coil are connected in series and then connected between the first interface and the second interface.

[0114] The loudspeaker according to clause 1, wherein the first cone comprises a flat first cone body, the second cone comprises a flat second cone body, the first cone body and the second cone body are parallel to each other and are both perpendicular to the movement axis in an initial state.

[0115] A method for assembling a loudspeaker according to any one of clauses 1 to 13, comprising the following steps:

[0116] Installing the first magnetic circuit in the inner cylinder of the basin frame;

[0117] Fixing the first voice coil on the first cone;

[0118] Inserting the first voice coil into the first magnetic gap of the first magnetic circuit, and fixing the outer edge of the first cone to the first end of the outer tube of the cone frame;

[0119] Turn the basin frame upside down and place the second magnetic circuit in the installation groove of the first magnetic circuit;

[0120] fixing the second voice coil on the second cone;

[0121] 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 to the second end of the outer tube of the basin frame.

[0122] A car audio system includes a subwoofer, wherein the subwoofer adopts the speaker according to any one of clauses 1 to 13.

[0123] As shown in this specification and claims, the terms "comprise" and "include" only indicate the inclusion of the steps and elements that have been explicitly identified, and these steps and elements do not constitute an exclusive list. The method or apparatus may also include other steps or elements.

[0124] Those skilled in the art will understand that, unless otherwise stated, the singular forms "a", "the" and "the" used herein may also include plural forms. It is further understood that "a plurality" in this disclosure refers to two or more, and other quantifiers are similar thereto.

[0125] It will be further understood that the terms "first," "second," and the like are used to describe various types of information, but such information should not be limited to these terms. These terms are used solely to distinguish information of the same type from one another and do not indicate a particular order or level of importance. In fact, the terms "first," "second," and the like are fully interchangeable. For example, first information could be referred to as second information, and similarly, second information could be referred to as first information without departing from the scope of this disclosure.

[0126] In the present disclosure, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0127] The above embodiment is only for illustrating the technical concept and features of the present disclosure and is a preferred embodiment. Its purpose is to enable people familiar with this technology to understand the content of the present disclosure and implement it accordingly, and it is not intended to limit the scope of protection of the present disclosure.

Claims

1. A speaker, comprising: A basin frame, which is hollow and has a first end and a second end opposite to each other; A first cone, an outer edge of which is connected to the first end, the first cone having a front side and a back side; A first voice coil connected to the first cone; A first magnetic circuit, which is used to drive the first voice coil to reciprocate along a motion axis, wherein a first magnetic gap is formed inside the first magnetic circuit for the first voice coil to be inserted into; A second cone, an outer edge of which is connected to the second end, the second cone having a front side and a back side; a second voice coil connected to the second cone; and a second magnetic circuit, which is used to drive the second voice coil to reciprocate along the motion axis, and the interior of the second magnetic circuit forms a second magnetic gap for the second voice coil to be inserted; Among them, the back side of the first sound basin and the back side of the second sound basin are arranged opposite to each other, the first magnetic circuit is arranged between the first sound basin and the second sound basin, the first magnetic circuit is connected to the basin frame, the first magnetic circuit is provided with an installation groove, and the second magnetic circuit is arranged in the installation groove of the first magnetic circuit.

2. The loudspeaker according to claim 1, characterized in that The first end is sealed by the first sound basin, and the second end is sealed by the second sound basin, so as to form a cavity in the basin frame; the first voice coil, the first magnetic circuit, the second voice coil and the second magnetic circuit are all located in the cavity.

3. The loudspeaker according to claim 1, characterized in that The first end is sealed by the first sound basin, and the second end is sealed by the second sound basin, so as to form a cavity in the basin frame; and a vent hole for connecting the cavity with the outside air is provided on the side wall of the basin frame.

4. A loudspeaker according to any preceding claim, characterised in that The first magnetic circuit includes a first magnetic bowl, a first magnetic steel and a first front plate arranged in the first magnetic bowl, a through hole is opened on the bottom of the first magnetic bowl and at least one of the first magnetic steels, and the through holes are aligned to form all or part of the mounting groove; the diameter of the first voice coil is larger than the diameter of the second voice coil, and the aperture of the through hole is larger than the diameter of the second voice coil and smaller than the diameter of the first voice coil.

5. The loudspeaker according to claim 4, characterized in that Through holes are formed on the bottom of the first magnetic bowl, the first front plate and all of the first magnetic steels, and the through holes are aligned to form the mounting groove.

6. The loudspeaker according to claim 4 or 5, characterized in that: The second magnetic circuit is disposed in the through hole of the first magnetic conductive bowl and in at least one through hole of the first magnetic steel.

7. The loudspeaker according to claim 6, characterized in that A magnetic shielding material is arranged between the second magnetic circuit and the first front sheet.

8. The loudspeaker according to any one of claims 4 to 7, characterized in that: The number of the first magnetic steels is two, and the first front plate is located between the two first magnetic steels. The number of the second magnetic steels is two, and a second front plate is arranged between the two second magnetic steels.

9. A loudspeaker according to any preceding claim, characterised in that A magnetic shielding material is provided between the first magnetic circuit and the second magnetic circuit.

10. A loudspeaker according to any preceding claim, characterised in that The first voice coil is provided with a first air flow hole to connect the space inside and outside the first voice coil; the second voice coil is provided with a second air flow hole to connect the space inside and outside the second voice coil.

11. A loudspeaker according to any preceding claim, characterised in that The first voice coil is fixedly connected to the first sound basin via a first bracket, the first bracket has a top fitted on the back of the first sound basin and a first flange extending downward from the top, the top of the first voice coil is sleeved on the first flange and fixedly connected; the second voice coil is fixedly connected to the second sound basin via a second bracket, the second bracket has a bottom fitted on the back of the second sound basin and a second flange extending upward from the bottom, the bottom of the second voice coil is sleeved on the second flange and fixedly connected.

12. A loudspeaker according to any preceding claim, characterised in that The loudspeaker further comprises a first positioning support, the inner edge of which is fixed on the first voice coil and the outer edge of which is fixed on the basin frame; the loudspeaker further comprises a second positioning support, the inner edge of which is fixed on the second voice coil and the outer edge of which is fixed on the basin frame.

13. The loudspeaker according to claim 12, characterized in that The basin frame includes an outer tube and an inner tube, the first sound basin and the second sound basin are respectively connected to the two ends of the outer tube, and the outer tube is provided with one or more air holes; the inner tube is connected to the inner wall of the outer tube through a plurality of spaced connecting ribs, the first magnetic circuit is fixedly arranged in the inner tube, the outer edge of the first positioning support piece and the outer edge of the second positioning support piece are respectively connected to the two ends of the inner tube; the diameter of the upper end of the inner tube is greater than the diameter of the lower end thereof.

14. The loudspeaker according to any one of claims 1 to 12, characterized in that: The basin frame includes an outer tube and an inner tube, the first sound basin and the second sound basin are respectively connected to the two ends of the outer tube, the first end is sealed by the first sound basin, and the second end is sealed by the second sound basin, so as to form a cavity in the basin frame; the outer tube is provided with one or more air holes connecting the cavity with the outside air; the inner tube is connected to the inner wall of the outer tube through a plurality of spaced connecting ribs, and the first magnetic circuit is fixedly arranged in the inner tube; the first voice coil is provided with a first air flow hole to connect the space inside and outside the first voice coil, and the second voice coil is provided with a second air flow hole to connect the space inside and outside the second voice coil.

15. A loudspeaker according to any preceding claim, characterised in that The basin frame is provided with a first interface and a second interface; the lead wire of the first voice coil is electrically connected to the first interface, and the lead wire of the second voice coil is electrically connected to the second interface.

16. A loudspeaker according to any preceding claim, characterised in that The basin frame is provided with a first interface and a second interface; the positive lead of the first voice coil and the positive lead of the second voice coil are electrically connected to the first interface, and the negative lead of the first voice coil and the negative lead of the second voice coil are electrically connected to the second interface.

17. A loudspeaker according to any preceding claim, characterised in that The basin frame is provided with a first interface and a second interface; 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.

18. A loudspeaker according to any preceding claim, characterised in that The first sound cone includes a flat first sound cone body, and the second sound cone includes a flat second sound cone body. The first sound cone body and the second sound cone body are parallel to each other and are perpendicular to the movement axis in an initial state.

19. A method for assembling a loudspeaker according to any one of claims 1 to 18, comprising the following steps: Installing the first magnetic circuit in the inner cylinder of the basin frame; Fixing the first voice coil on the first cone; Inserting the first voice coil into the first magnetic gap of the first magnetic circuit, and fixing the outer edge of the first sound cone on the first end of the outer tube of the basin frame; Turn the basin frame upside down and place the second magnetic circuit in the installation 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 to the second end of the outer tube of the cone frame.

20. A car audio system, comprising a subwoofer, characterized in that: The subwoofer adopts the speaker as described in any one of claims 1 to 18.

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