Double-sided sound device

Abstract

The present invention provides a coaxial double-sided sound device. [Solution] The coaxial double-sided sound generating device includes a frame, a first vibration system and a second vibration system, which are fixed to opposite sides of the frame, respectively, and a magnetic circuit system, the first vibration system includes a first vibration membrane and a first voice coil fixed to the frame, and the second vibration system includes a second vibration membrane and a second voice coil fixed to the frame, the double-sided sound generating device further includes a front cover fixed to the frame and disposed below the first vibration membrane, the front cover is disposed at a distance from the first vibration membrane to form a first front chamber, the frame is provided with a sound guide channel passing through it, the sound guide channel includes a first opening toward one side of the first vibration membrane and a second opening toward one side of the second vibration membrane, the first opening communicates with the first front chamber, and the second opening is located on the outer periphery side of the second vibration membrane. The double-sided sound generating device according to the present invention achieves higher loudness.

Description

[Technical field]

[0001] The present invention relates to the field of electroacoustic conversion, and in particular to a double-sided sound device. [Background technology]

[0002] The sound generating device includes a single-sided sound generating device and a double-sided sound generating device, but the sound pressure level of the double-sided sound generating device far exceeds that of the single-sided sound generating device and has better acoustic performance.

[0003] Currently, a double-sided sound device is generally made by simply stacking one single-sided sound device on the back of another single-sided sound device, which results in an excessively large product volume, and since the sound output passages of the two single-sided sound devices are not located on the same side, the loudness of the double-sided sound device is insufficient and the sound quality cannot be optimized, and since each of the two single-sided sound devices has an independent magnetic circuit system, the utilization rate of the single magnetic circuit system cannot be maximized, and the material cost tends to remain high.

[0004] Therefore, it is necessary to provide a new double-sided sound generating device to solve the above problems. Summary of the Invention [Problem to be solved by the invention]

[0005] SUMMARY OF THE PRESENT EMBODIMENT In order to solve the above technical problems, the present invention has an object to provide a double-sided sound generating device that has higher loudness, a smaller product volume, and a high utilization rate of the magnetic circuit system. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides a double-sided sound generating device, which includes a frame, a first vibration system and a second vibration system fixed to opposite sides of the frame, respectively, and a magnetic circuit system installed between the first vibration system and the second vibration system, the first vibration system includes a first vibration membrane fixed to the frame and a first voice coil that drives the vibration sound of the first vibration membrane, the second vibration system includes a second vibration membrane fixed to the frame and a second voice coil that drives the vibration sound of the second vibration membrane, the double-sided sound generating device further includes a front cover fixed to the frame and provided below the first vibration membrane, the front cover is installed at a distance from the first vibration membrane to form a first front chamber, the frame is provided with a sound guide channel penetrating the frame, the sound guide channel includes a first opening toward one side of the first vibration membrane and a second opening toward one side of the second vibration membrane, the first opening is connected to the first front chamber, and the second opening is located on the outer periphery side of the second vibration membrane.

[0007] Preferably, the sound conducting channel passes through the frame along the vibration direction.

[0008] Preferably, at least two of the sound-guiding channels are provided in the frame, and the at least two of the sound-guiding channels are provided at a distance from each other.

[0009] Preferably, the frame includes a first frame fixedly connected to the first diaphragm and a second frame fixedly connected to the second diaphragm and fixed to the first frame, the first frame is provided with a first sound-guiding channel penetrating the first frame, the second frame is provided with a second sound-guiding channel penetrating the second frame, the first sound-guiding channel communicates with the first front chamber, and the first sound-guiding channel communicates with the second sound-guiding channel to form the sound-guiding channel.

[0010] Preferably, the first diaphragm is fixed to an inner edge of the first frame, the front cover is fixed to an outer edge of the first frame, and the first sound-guiding channel is formed between the inner edge and the outer edge of the first frame.

[0011] Preferably, the second diaphragm is fixed to an inner edge of the second frame, and the second sound-guiding channel is formed between the inner edge and the outer edge of the second frame.

[0012] Preferably, the magnetic circuit system includes a magnetic yoke fixed to the frame, a magnetic steel housed within the magnetic yoke and installed at a distance from the magnetic yoke, and a fixing member installed between the magnetic yoke and the magnetic steel and supporting the magnetic steel to the magnetic yoke, one end of the magnetic yoke adjacent to the first vibrating membrane forms a first magnetic gap between the magnetic steel and the magnetic yoke, and one end of the magnetic yoke adjacent to the second vibrating membrane forms a second magnetic gap between the magnetic steel and the magnetic steel, the first vibration system further includes a first skeleton fixed to one side of the first vibrating membrane toward the magnetic steel, the first voice coil is inserted in the first magnetic gap via the first skeleton, and the second vibration system further includes a second skeleton fixed to one side of the second vibrating membrane toward the magnetic steel, and the second voice coil is inserted in the second magnetic gap via the second skeleton.

[0013] Preferably, the frame is provided with a plurality of support beams extending so as to be fixed to the outside of the magnetic yoke, and the plurality of support beams are provided at intervals along the periphery of the magnetic yoke.

[0014] Preferably, the first vibrating membrane includes a first dome fixed to the first skeleton, a first suspension surrounding the first dome and fixed to the first frame, and a first extending wall extending from the first dome toward the second vibrating membrane, the first vibration system further includes a first support member fixed to one end of the first extending wall away from the first vibrating membrane, the second vibrating membrane includes a second dome fixed to the second skeleton, a second suspension surrounding the second dome and fixed to the second frame, and a second extending wall extending from the second dome toward the first vibrating membrane, and the second vibration system further includes a second support member fixed to one end of the second extending wall away from the second vibrating membrane, and a projection of the first support member along the vibration direction is installed at a distance from a projection of the second support member along the vibration direction.

[0015] Preferably, a projection of the first support member along the vibration direction is located between two adjacent support beams, and a projection of the second support member along the vibration direction is located between two adjacent support beams. Effect of the Invention

[0016] Compared with related technologies, in the double-sided sound device of the present invention, the sound output directions of the two vibration systems are the same, thereby increasing the loudness of the double-sided sound device and effectively improving the sound quality; and, by having the two vibration systems share one magnetic circuit, not only can the utilization rate of the magnetic circuit system be increased, but the structure of the double-sided sound device can be made compact and material costs can be reduced. [Brief description of the drawings]

[0017] In order to more clearly explain the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings that need to be used in the description of the embodiments. However, the drawings described below are only some embodiments of the present invention, and it is obvious to those skilled in the art in the technical field to which the present invention belongs that they can obtain other drawings based on these drawings without any creative work. [Figure 1] 1 is a perspective view of a double-sided sound generating device according to the present invention; [Diagram 2] FIG. 2 is an exploded perspective view of the double-sided sound generating device according to the present invention. [Diagram 3] FIG. 2 is a cross-sectional view taken along the line AA in FIG. [Figure 4] FIG. 4 is an enlarged view of part B in FIG. [Diagram 5] FIG. 2 is a cross-sectional view taken along line CC in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, but it is clear that the described embodiments are only some of the embodiments of the present invention, and are not all of the embodiments. All other embodiments obtained based on the embodiments of the present invention without the creative labor of those skilled in the art shall fall within the protection scope of the present invention.

[0019] As shown in Figures 1 to 5, the present invention provides a coaxial double-sided sound generating device 100, which includes a frame 10, a first vibration system 20 and a second vibration system 30 fixed to opposite sides of the frame 10, respectively, and a magnetic circuit system 40 installed between the first vibration system 20 and the second vibration system 30.

[0020] The first vibration system 20 includes a first vibrating membrane 21 fixed to the frame 10, and a first voice coil 22 that drives the first vibrating membrane 21 to vibrate and generate sound.

[0021] The second vibration system 30 includes a second vibrating membrane 31 fixed to the frame 10, and a second voice coil 32 that drives the second vibrating membrane 31 to vibrate and generate sound.

[0022] The magnetic circuit system 40 includes a magnetic yoke 41 fixed to the frame 10, a magnetic steel 42 housed in the magnetic yoke 41 and installed at a distance from the magnetic yoke 41, and a fixing member 43 installed between the magnetic yoke 41 and the magnetic steel 42 and supporting the magnetic steel 42 on the magnetic yoke 41, one end of the magnetic yoke 41 close to the first vibrating membrane 21 forms a first magnetic gap 44 between the magnetic steel 42 and the magnetic steel 42, and one end of the magnetic yoke 41 close to the second vibrating membrane 31 forms a second magnetic gap 45 between the magnetic steel 42 and the magnetic steel 42. In this embodiment, the frame 10 is provided with a plurality of support beams 11 extending to be fixed to the outside of the magnetic yoke 41, the plurality of support beams 11 are installed at intervals along the circumferential side of the magnetic yoke 41, and the magnetic yoke 41 fixes the magnetic circuit system 40 to the frame 10 via the support beams 11. In order to further improve the magnetic field performance of the magnetic circuit system 40, the magnetic circuit system 40 includes a first pole plate 46 installed on one side of the magnetic steel 42 toward the first vibrating membrane 21, a second pole plate 47 installed on one side of the magnetic steel 42 toward the second vibrating membrane 31, and a third pole plate 48 installed on one side of the second pole plate 47 toward the second vibrating membrane 31.

[0023] The first vibration system 20 further includes a first skeleton 23 fixed to one side of the first vibrating membrane 21 facing the magnetic steel 42, and the first voice coil 22 is inserted into the first magnetic gap 44 by the first skeleton 23, and the second vibration system 30 further includes a second skeleton 33 fixed to one side of the magnetic steel 42 of the second vibrating membrane 31, and the second voice coil is inserted into the second magnetic gap 45 by the second skeleton 33.

[0024] Furthermore, the double-sided sound generating device 100 further includes a front cover 50 fixed to the frame 10 and provided below the first vibrating membrane 21, the front cover 50 is provided at a distance from the first vibrating membrane 21 to form a first front chamber 24, the frame 10 is provided with a sound guide channel 12 penetrating the frame 10, the sound guide channel 12 includes a first opening 121 toward one side of the first vibrating membrane 21 and a second opening 122 toward one side of the second vibrating membrane 31, the first opening 121 communicates with the first front chamber 24, and the second opening 122 is located on the circumferential side of the second vibrating membrane 31. As a result, the acoustic wave generated by the vibration of the first vibrating membrane 21 is conducted to the outer circumferential side of the second vibrating membrane 31 through the sound guide channel 12, effectively improving the loudness of the double-sided sound generating device 100. As can be understood, the sound-guiding channel 12 passes through the frame 10 along the vibration direction, and at least two sound-guiding channels 12 are installed in the frame 10, and the at least two sound-guiding channels 12 are installed at a distance from each other.

[0025] Further, the frame 10 includes a first frame 13 fixedly connected to the first vibrating membrane 21, and a second frame 14 fixedly connected to the second vibrating membrane 31 and fixed to the first frame 13, the first frame 13 has a first sound-guiding channel 131 penetrating the first frame 13, the second frame 14 has a second sound-guiding channel 141 penetrating the second frame 14, the first sound-guiding channel 131 communicates with the first front chamber 24, and the first sound-guiding channel 131 communicates with the second sound-guiding channel 141 to form the sound-guiding channel 12.

[0026] As can be seen, the support beam 11 extends from the first frame 13 to be fixed to the magnetic yoke 41. The first diaphragm 21 is fixed to an inner edge of the first frame 13, the front cover 50 is fixed to an outer edge of the first frame 13, and the first sound guide channel 131 is formed between the inner edge and the outer edge of the first frame 13. The second diaphragm 31 is fixed to an inner edge of the second frame 14, and the second sound guide channel 141 is formed between the inner edge and the outer edge of the second frame 14.

[0027] Specifically, the first vibrating membrane 21 includes a first dome 211 fixed to the first skeleton 23, a first suspension 212 surrounding the first dome 211 and fixed to the first frame 13, and a first extending wall 213 extending from the first dome 211 toward the second vibrating membrane 31. The first vibration system 20 further includes a first support member 25 fixed to one end of the first extending wall 213 away from the first vibrating membrane 21, and the second vibrating membrane 31 includes a second dome 311 fixed to the second skeleton 33, a second suspension 312 surrounding the second dome 311 and fixed to the second frame 14, and a second extending wall 313 extending from the second dome 311 toward the first vibrating membrane 21. The second vibration system 30 further includes a second support member 34 fixed to one end of the second extending wall 313 away from the second vibrating membrane 31. Here, the projection of the first support member 25 along the vibration direction is disposed at a distance from the projection of the second support member 34 along the vibration direction. Furthermore, the projection of the first support member 25 along the vibration direction is located between two adjacent support beams 11, and the projection of the second support member 34 along the vibration direction is located between two adjacent support beams 11.

[0028] Compared with the related art, the double-sided sound generating device according to the present invention includes a frame, a first vibration system and a second vibration system fixed to opposite sides of the frame, respectively, and a magnetic circuit system installed between the first vibration system and the second vibration system, the first vibration system includes a first vibrating membrane fixed to the frame and a first voice coil for driving the vibration sound of the first vibrating membrane, the second vibration system includes a second vibrating membrane fixed to the frame and a second voice coil for driving the vibration sound of the second vibrating membrane, the double-sided sound generating device further includes a front cover fixed to the frame and provided below the first vibrating membrane, the front cover is provided with a gap between it and the first vibrating membrane to form a first front chamber, the frame is provided with a sound guide channel penetrating the frame, the sound guide channel includes a first opening toward one side of the first vibrating membrane and a second opening toward one side of the second vibrating membrane, the first opening is connected to the first front chamber, and the second opening is located on the outer periphery side of the second vibrating membrane. In the double-sided sound device of the present invention, by making the sound output directions of the two vibration systems the same, the loudness of the double-sided sound device can be increased and the sound quality can be effectively improved, and by having the two vibration systems share one magnetic circuit, not only can the utilization rate of the magnetic circuit system be increased, but the structure of the double-sided sound device can be made compact and material costs can be reduced.

[0029] The above is only one embodiment of the present invention, and various modifications may be made by those skilled in the art to which the present invention pertains without departing from the creative concept of the present invention, and it should be understood that all of these modifications fall within the scope of the present invention.

Claims

1. A double-sided sound generating device, The double-sided sound generating device includes a frame, a first vibration system and a second vibration system fixed to opposite sides of the frame, respectively, and a magnetic circuit system installed between the first vibration system and the second vibration system, The first vibration system includes a first vibrating membrane fixed to the frame and a first voice coil that drives the first vibrating membrane to vibrate and generate sound. the second vibration system includes a second vibrating membrane fixed to the frame and a second voice coil that drives the second vibrating membrane to vibrate and generate sound; The double-sided sound generating device further includes a front cover fixed to the frame and disposed below the first diaphragm, the front cover is disposed at a distance from the first vibrating membrane to form a first front chamber; The frame is provided with a sound guide channel passing through the frame, the sound guide channel includes a first opening toward one side of the first diaphragm and a second opening toward one side of the second diaphragm, The double-sided sound generating device, characterized in that the first opening communicates with the first front chamber, and the second opening is located on an outer periphery side of the second vibrating membrane.

2. 2. The double-sided sound generating device according to claim 1, wherein the sound guide channel passes through the frame along a vibration direction.

3. 2. The double-sided sound generating device according to claim 1, wherein the frame is provided with at least two of the sound guide channels, the at least two sound guide channels being spaced apart from each other.

4. The frame is a first frame fixedly connected to the first diaphragm; a second frame fixedly connected to the second diaphragm and fixed to the first frame; The first frame is provided with a first sound guide channel penetrating the first frame, The second frame is provided with a second sound-guiding channel penetrating the second frame, the first sound-conducting channel communicates with the first front chamber; 2. The double-sided sound-producing device according to claim 1, wherein the first sound-guiding channel communicates with the second sound-guiding channel to form the sound-guiding channel.

5. the first vibrating membrane is fixed to an inner edge of the first frame, the front cover is fixed to an outer edge of the first frame, The double-sided sound generating device according to claim 4 , wherein the first sound guide channel is formed between an inner edge and an outer edge of the first frame.

6. the second vibrating membrane is fixed to an inner edge of the second frame, The double-sided sound generating device according to claim 4 , wherein the second sound guide channel is formed between an inner edge and an outer edge of the second frame.

7. The magnetic circuit system includes: A magnetic yoke fixed to the frame; a magnetic steel member accommodated in the magnetic yoke and spaced apart from the magnetic yoke; a fixing member disposed between the magnetic yoke and the magnetic steel and supporting the magnetic steel on the magnetic yoke; a first magnetic gap is formed between the magnetic yoke and the magnetic steel at one end thereof adjacent to the first vibrating membrane; a second magnetic gap is formed between the magnetic yoke and the magnetic steel at one end thereof adjacent to the second vibrating membrane; the first vibration system further includes a first skeleton fixed to one side of the first vibration membrane facing the magnetic steel; the first voice coil is inserted into the first magnetic gap via the first framework, the second vibration system further includes a second skeleton fixed to one side of the second vibration membrane facing the magnetic steel, 5. The double-sided sound generating device according to claim 4, wherein the second voice coil is inserted into the second magnetic gap via the second framework.

8. The frame is provided with a plurality of support beams extending so as to be fixed to the outer side of the magnetic yoke, 8. The double-sided sound generating device according to claim 7, wherein a plurality of said support beams are installed at intervals along the periphery of said magnetic yoke.

9. The first vibrating membrane is a first dome fixed to the first framework; a first suspension surrounding the first dome and fixed to the first frame; a first extending wall extending from the first dome toward the second diaphragm, the first vibration system further includes a first support member fixed to one end of the first extension wall away from the first vibration membrane, The second vibrating membrane is a second dome fixed to the second framework; a second suspension surrounding the second dome and fixed to the second frame; a second extending wall extending from the second dome toward the first diaphragm, the second vibration system further includes a second support member fixed to one end of the second extension wall away from the second vibration membrane, 9. The double-sided sound generating device according to claim 8, wherein a projection along the vibration direction of the first support member is spaced apart from a projection along the vibration direction of the second support member.

10. A projection of the first support member along the vibration direction is located between two adjacent support beams, 10. The double-sided sound generating device according to claim 9, wherein a projection of the second support member along the vibration direction is located between two adjacent support beams.

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