A sound-generating device

Abstract

The present invention provides a sound-generating device, comprising: a frame, the frame being provided with at least a first mounting hole and a second mounting hole; at least a first sound-generating unit and a second sound-generating unit, the first sound-generating unit comprising a first vibration system and a first magnetic circuit system, the first vibration system being mounted at a first vibration end of the first mounting hole, and the first magnetic circuit system being mounted at a first magnetic circuit end of the first mounting hole; the second sound-generating unit comprising a second vibration system and a second magnetic circuit system, the second vibration system being mounted at a second vibration end of the second mounting hole, and the second magnetic circuit system being mounted at a second magnetic circuit end of the second mounting hole; the first sound-generating unit being a high-frequency unit, and the second sound-generating unit being a low-frequency unit, wherein the resonant frequency F0 of the first sound-generating unit is greater than the resonant frequency F0' of the second sound-generating unit. Simultaneously mounting the low-frequency unit and the high-frequency unit on the frame can effectively improve the structural compactness of the sound-generating device and reduce its volume.

Description

Technical Field

[0001] The present invention relates to the field of acoustics, and more particularly, to a sound generating device. Background Art

[0002] As smart devices become increasingly miniaturized, users are placing higher demands on their battery life. Consequently, batteries in devices like tablets and mobile phones are becoming increasingly larger. Simultaneously, the number of components, such as chips and cameras, within these devices is increasing, and the space within these devices is becoming increasingly compact. To achieve perfect sound quality, the simultaneous installation of both woofers and tweeters consumes significant internal space, making them unsuitable for structural design and significantly hindering the trend toward miniaturization.

[0003] Therefore, it is necessary to improve the sound-generating device to overcome the above-mentioned defects. Summary of the Invention

[0004] An object of the present invention is to provide a sound-generating device to solve the problem in the prior art that high-frequency speakers and low-frequency speakers occupy a large space in smart devices.

[0005] A sound-generating device, comprising:

[0006] a frame, wherein the frame is provided with at least a first mounting through hole and a second mounting through hole, the first mounting through hole having a first vibrating end and a first magnetic circuit end, the second mounting through hole having a second vibrating end and a second magnetic circuit end, the first vibrating end and the second vibrating end being located on one side of the frame, and the first magnetic circuit end and the second magnetic circuit end being located on the other side of the frame;

[0007] At least a first sound-generating unit and a second sound-generating unit, wherein the first sound-generating unit includes a first vibration system and a first magnetic circuit system, the first vibration system is mounted on a first vibration end of the first mounting through-hole, and the first magnetic circuit system is mounted on a first magnetic circuit end of the first mounting through-hole;

[0008] The second sound-generating unit includes a second vibration system and a second magnetic circuit system, the second vibration system is installed at the second vibration end of the second mounting through hole, and the second magnetic circuit system is installed at the second magnetic circuit end of the second mounting through hole;

[0009] The first sound emitting unit is a high-frequency unit, the second sound emitting unit is a low-frequency unit, and a resonance frequency F0 of the first sound emitting unit is greater than a resonance frequency F0' of the second sound emitting unit.

[0010] Optionally, the frame is a rectangular structure, and the first mounting through hole and the second mounting through hole are arranged side by side on the frame.

[0011] Optionally, the first sound emitting unit and the second sound emitting unit are both rectangular structures, and the long axis direction of the first sound emitting unit is parallel to or perpendicular to the long axis direction of the second sound emitting unit.

[0012] Optionally, the relationship between the resonance frequency F0 of the first sound emitting unit and the resonance frequency F0' of the second sound emitting unit is F0≥2F0'.

[0013] Optionally, a sound radiation area Sd of the first sound emitting unit is smaller than a sound radiation area Sd' of the second sound emitting unit.

[0014] Optionally, the equivalent mass Mms of the first vibration system is smaller than the equivalent mass Mms' of the second vibration system.

[0015] Optionally, the first vibration system includes a first vibration membrane, and the second vibration system includes a second vibration membrane;

[0016] The first diaphragm and the second diaphragm are provided separately;

[0017] Alternatively, the first diaphragm and the second diaphragm are integrally arranged, the first diaphragm and the second diaphragm are connected by a connecting portion, the frame is provided with a connecting wall between the first mounting through hole and the second mounting through hole, and the connecting portion is fixed on the connecting wall.

[0018] Optionally, the first vibration system further includes a first voice coil, the second vibration system further includes a second voice coil, and a voice coil wire diameter of the first voice coil is smaller than a voice coil wire diameter of the second voice coil.

[0019] Optionally, the voice coil wire of the first voice coil is made of copper-clad aluminum, and the voice coil wire of the second voice coil is made of copper wire.

[0020] Optionally, the first magnetic circuit system includes a first magnetic yoke, a first side magnet provided on the first magnetic yoke, and a first side magnetic conductive plate provided on the first side magnet;

[0021] The second magnetic circuit system includes a second magnetic yoke, a second side magnet provided on the second magnetic yoke, and a second side magnetic conductive plate provided on the second side magnet;

[0022] At least one of the first magnetic yoke and the second magnetic yoke, the first side magnet and the second side magnet, and the first side magnetic conductive plate and the second magnetic conductive plate is connected together.

[0023] The beneficial effect of the technical solution of the present invention is that by simultaneously installing the low-frequency unit and the high-frequency unit on the frame, the structural compactness of the sound-generating device can be effectively improved and the volume of the sound-generating device can be reduced.

[0024] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0026] Figure 1 is a structural schematic diagram of a sound-generating device according to an embodiment of the present invention;

[0027] Figure 2 Schematic diagram of the structure of the first magnet group and the second magnet group according to an embodiment of the present invention;

[0028] The markings in the figure are as follows: 10 frame; 101 first mounting hole; 102 second mounting hole; 20 first sound unit; 201 first voice coil; 202 first diaphragm; 203 first magnet group; 204 first magnetic conductive plate; 205 first magnetic yoke; 30 second sound unit; 301 second voice coil; 302 second diaphragm; 303 second magnet group; 304 second magnetic conductive plate; 305 second magnetic yoke. DETAILED DESCRIPTION

[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0030] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0031] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0032] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0033] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0034] The present invention provides a sound-generating device, comprising: a frame, on which is provided at least a first mounting through-hole and a second mounting through-hole, the first mounting through-hole having a first vibration end and a first magnetic circuit end, the second mounting through-hole having a second vibration end and a second magnetic circuit end, the first vibration end and the second vibration end being located on one side of the frame, and the first magnetic circuit end and the second magnetic circuit end being located on the other side of the frame; at least a first sound-generating unit and a second sound-generating unit, the first sound-generating unit comprising a first vibration system and a first magnetic circuit system, the first vibration system being mounted on the first vibration end of the first mounting through-hole, and the first magnetic circuit system being mounted on the first magnetic circuit end of the first mounting through-hole; the second sound-generating unit comprising a second vibration system and a second magnetic circuit system, the second vibration system being mounted on the second vibration end of the second mounting through-hole, and the second magnetic circuit system being mounted on the second magnetic circuit end of the second mounting through-hole; the first sound-generating unit is a high-frequency unit, the second sound-generating unit is a low-frequency unit, and the resonance frequency F0 of the first sound-generating unit is greater than the resonance frequency F0' of the second sound-generating unit.

[0035] Figure 1The figure is a schematic structural diagram of a sound-generating device according to an embodiment of the present invention. As can be seen from the figure, the sound-generating device of the present invention includes a frame 10. The frame is provided with at least two mounting holes, the number of which corresponds to the number of sound-generating units, for mounting components of the sound-generating units. Optionally, the frame includes a first mounting hole 101 and a second mounting hole 102. The sound-generating device includes at least two sound-generating units. The two sound-generating units are a first sound-generating unit 20 and a second sound-generating unit 30. Optionally, the first sound-generating unit and the second sound-generating unit have similar structures. The first sound-generating unit is mounted on the first mounting hole of the frame, and the second sound-generating unit is mounted on the second mounting hole of the frame. Specifically, the first mounting hole includes a first vibration end and a first magnetic circuit end. The first sound-generating unit includes a first vibration system and a first magnetic circuit system. The first vibration system is mounted on the first vibration end, and the first magnetic circuit system is mounted on the first magnetic circuit end. The second mounting hole includes a second vibration end and a second magnetic circuit end. The second sound-generating unit includes a second vibration system and a second magnetic circuit system. The second vibration system is mounted on the second vibration end, and the second magnetic circuit system is mounted on the second magnetic circuit end. The first vibration end and the second vibration end are located on the same side of the frame, and the first magnetic circuit end and the second magnetic circuit end are located on the other side of the frame. That is, the first sound-emitting unit and the second sound-emitting unit are mounted on the frame in the same direction. Optionally, the first sound-emitting unit and the second sound-emitting unit can convert electrical signals into sound signals through vibration, wherein the first sound-emitting unit is a high-frequency unit and the second sound-emitting unit is a low-frequency unit. Optionally, in the present invention, the resonant frequency F0 of the first sound-emitting unit is set to be greater than the resonant frequency F0' of the second sound-emitting unit. Under this design, the first sound-emitting unit can restore sound signals in the high-frequency range, and the second sound-emitting unit can restore sound signals in the low-frequency range, thereby improving the sound reproduction performance of the sound-emitting device.

[0036] The present invention provides a frame in the sound-emitting device and simultaneously installs a high-frequency first sound-emitting unit and a low-frequency second sound-emitting unit on the frame. This not only widens the frequency width of the sound-emitting device, improves the sound effect of the sound-emitting device, and enables the sound-emitting device to have a higher degree of sound restoration, but also effectively improves the structural compactness of the sound-emitting device and reduces the volume of the sound-emitting device to meet the miniaturization requirements.

[0037] As an embodiment of the present invention, Figure 1As shown, the frame 10 can be configured as a rectangular structure, and the first mounting hole 101 and the second mounting hole 102 on the frame can be arranged side by side. Specifically, the first mounting hole and the second mounting hole can be arranged along the length of the frame. Arranging the mounting holes side by side can provide installation space for the sound unit, facilitate the installation of the sound unit, and help improve the production efficiency of the sound device. In addition, the sound device composed of a rectangular frame has a higher compatibility with elongated smart devices, such as mobile phones, and is convenient for installation of the sound device in the smart device.

[0038] In the present invention, Figure 1 As shown, the first sound unit 20 and the second sound unit 30 can be arranged into a rectangular structure. The long axis direction of the first sound unit is installed parallel to the long axis direction of the second sound unit. Alternatively, the long axis of the first sound unit is installed perpendicular to the long axis direction of the second sound unit. Arranging the first sound unit and the second sound unit into a rectangular structure can adapt to the rectangular structure of the frame 10, increase the proportion of the first mounting through hole 101 and the second mounting through hole 102 on the frame, improve the space utilization rate in the sound device, and help reduce the volume of the sound device. At the same time, the long axes of the first sound unit and the second sound unit are installed parallel to or perpendicular to each other to improve the installation flexibility of the sound unit.

[0039] Optionally, the relationship between the resonance frequency F0 of the first sound emitting unit and the resonance frequency F0' of the second sound emitting unit is F0≥2F0'.

[0040] As an embodiment of the present invention, the resonance frequency F0 of the first sound unit 20 and the resonance frequency F0' of the second sound unit 30 are set to F0≥2F0', that is, F0 is at least twice F0'. In this way, the difference between the resonance frequency F0 of the first sound unit and the resonance frequency F0' of the second sound unit can be ensured, so that the sound frequency emitted by the second sound unit is maintained at a low frequency, and the sound frequency emitted by the first sound unit is maintained at a medium and high frequency, which is conducive to further broadening the frequency bandwidth of the sound-emitting device and promoting the realization of perfect sound quality of the sound-emitting device.

[0041] Optionally, a sound radiation area Sd of the first sound emitting unit is smaller than a sound radiation area Sd' of the second sound emitting unit.

[0042] As an embodiment of the present invention, the sound radiation area Sd of the first sound unit 20 is set to be smaller than the sound radiation area Sd' of the second sound unit 30. The sound radiation area of ​​the sound unit refers to the effective area where the diaphragm contacts the moving air when the diaphragm vibrates. The larger the sound radiation area, the lower the resonant frequency of the sound unit. In order to ensure that the resonant frequency F0 of the first sound unit is greater than the resonant frequency F0' of the second sound unit, the sound radiation area Sd of the first sound unit can be set to be smaller than the sound radiation area Sd' of the second sound unit. When Sd is smaller than Sd', it is beneficial for the sound-emitting device to increase its response frequency range, making the tone clearer and louder.

[0043] Optionally, the equivalent mass Mms of the first vibration system is smaller than the equivalent mass Mms' of the second vibration system. The equivalent mass of a vibration system is directly related to the resonant frequency of the sound-emitting unit; the smaller the equivalent mass, the higher the resonant frequency. Thus, the equivalent mass Mms of the first sound-emitting unit 20 can be set to be smaller than the equivalent mass Mms' of the second sound-emitting unit 30. This ensures that the resonant frequency F0 of the first sound-emitting unit is greater than the resonant frequency F0' of the second sound-emitting unit, thereby ensuring the audio frequency bandwidth of the sound-emitting device.

[0044] In the sound-generating device of the present invention, the first vibration system includes a first diaphragm 202. Similarly, the second vibration system includes a second diaphragm 302. As an embodiment, the first diaphragm can be separated from the second diaphragm, so that the first diaphragm and the second diaphragm can be installed separately, thereby improving the installation flexibility of the two. As an embodiment, Figure 1 As shown, the first diaphragm 202 and the second diaphragm 302 are integrally arranged. This design method can form the first diaphragm and the second diaphragm in one piece, simplify the processing procedures of the diaphragm, reduce production costs, and at the same time, the integral arrangement can reduce the complexity of the diaphragm installation. Specifically, the first diaphragm and the second diaphragm that are integrally arranged are connected by a connecting portion. A connecting wall is provided on the frame 10 between the first mounting through hole 101 and the second mounting through hole 102, and the connecting portion for connecting the first diaphragm and the second diaphragm is fixed on the connecting wall. The connecting portion is fixed on the connecting wall of the frame to improve the connection strength between the first diaphragm and the second diaphragm and the frame.

[0045] Optionally, the first vibration system further includes a first voice coil, the second vibration system further includes a second voice coil, and a voice coil wire diameter of the first voice coil is smaller than a voice coil wire diameter of the second voice coil.

[0046] As an embodiment of the present invention, Figure 1As shown, the first sound-emitting unit 20 includes a first voice coil 201, and the second sound-emitting unit 30 includes a second voice coil 301. The first voice coil is connected to the first diaphragm 202, and the second voice coil is connected to the second diaphragm 302. When an alternating electrical signal is passed through the first and second voice coils, the voice coils vibrate under the action of the magnetic field, respectively driving the first and second diaphragms to vibrate, thereby achieving sound generation. In the present invention, the wire diameter of the voice coil wire of the first voice coil is set to be smaller than the wire diameter of the voice coil wire of the second voice coil. In this way, when the lengths of the two voice coil wires are equal, the mass of the first voice coil can be smaller than the mass of the second voice coil. This design method is conducive to ensuring that the equivalent mass Mms of the first vibration system is smaller than the equivalent mass Mms' of the second vibration system, thereby ensuring that the resonant frequency F0 of the first sound-emitting unit is greater than the resonant frequency F0' of the second sound-emitting unit.

[0047] Optionally, the voice coil wire of the first voice coil is made of copper-clad aluminum, and the voice coil wire of the second voice coil is made of copper wire.

[0048] As one embodiment of the present invention, the voice coil wire of the first voice coil 201 can be made of copper-clad aluminum, while the voice coil wire of the second voice coil 301 is copper wire. Because aluminum has a lower density than copper, the mass of the first voice coil made of copper-clad aluminum is lower than that of a copper wire voice coil. This further reduces the mass of the first voice coil, thereby ensuring that the equivalent mass Mms of the first vibration system is smaller than the equivalent mass Mms' of the second vibration system. Furthermore, both copper-clad aluminum and copper voice coil wires have excellent electrical conductivity and low material cost, which helps reduce the manufacturing cost of the voice coils.

[0049] Alternatively, as Figure 1 As shown, the first magnetic circuit system includes a first magnetic yoke 205 and a first magnet group 203. The first magnet group includes a first side magnet, which is arranged on the first magnetic yoke. A first side magnetic conductive plate 204 is provided on the first side magnet; similarly, the second magnetic circuit system includes a second magnetic yoke 305 and a second magnet group 303. The second magnet group includes a second side magnet, which is arranged on the second magnetic yoke. A second side magnetic conductive plate 304 is provided on the second side magnet. In the present invention, a connection can be formed between the first magnetic yoke and the second magnetic yoke, the first side magnet and the second side magnet, and the first side magnetic conductive plate and the second magnetic conductive plate. The connection relationship between one or more groups of the first magnetic yoke and the second magnetic yoke, the first side magnet and the second side magnet, and the first side magnetic conductive plate and the second magnetic conductive plate can improve the integration of the sound-generating device and reduce the installation complexity of the sound-generating device. As an embodiment, referring to Figure 2 In this case, the size of the mounting hole can be greatly reduced, making the assembly of the first and second sound units more compact, which is conducive to the miniaturization of the sound device and simplifies the installation process of the sound units.

[0050] The present invention provides a frame in the sound-emitting device and simultaneously installs a high-frequency first sound-emitting unit and a low-frequency second sound-emitting unit on the frame. This not only widens the frequency width of the sound-emitting device, improves the sound effect of the sound-emitting device, and enables the sound-emitting device to have a higher degree of sound restoration, but also effectively improves the structural compactness of the sound-emitting device and reduces the volume of the sound-emitting device to meet the miniaturization requirements.

[0051] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A sound-generating device, characterized in that: include: a frame, wherein the frame is provided with at least a first mounting through hole and a second mounting through hole, the first mounting through hole having a first vibrating end and a first magnetic circuit end, the second mounting through hole having a second vibrating end and a second magnetic circuit end, the first vibrating end and the second vibrating end being located on one side of the frame, and the first magnetic circuit end and the second magnetic circuit end being located on the other side of the frame; At least a first sound-emitting unit and a second sound-emitting unit, the first sound-emitting unit comprising a first vibration system and a first magnetic circuit system, the first vibration system being mounted at a first vibration end of the first mounting through-hole, the first magnetic circuit system being mounted at a first magnetic circuit end of the first mounting through-hole, the first magnetic circuit system comprising a first magnetic yoke, a first side magnet provided on the first magnetic yoke, and a first side magnetic conductive plate provided on the first side magnet; The second sound-generating unit includes a second vibration system and a second magnetic circuit system, the second vibration system is mounted on the second vibration end of the second mounting through-hole, the second magnetic circuit system is mounted on the second magnetic circuit end of the second mounting through-hole, and the second magnetic circuit system includes a second magnetic yoke, a second side magnet provided on the second magnetic yoke, and a second side magnetic conductive plate provided on the second side magnet; At least one of the first magnetic yoke and the second magnetic yoke, the first side magnet and the second side magnet, and the first side magnetic conductive plate and the second side magnetic conductive plate is connected together; The first sound emitting unit is a high-frequency unit, the second sound emitting unit is a low-frequency unit, and a resonance frequency F0 of the first sound emitting unit is greater than a resonance frequency F0' of the second sound emitting unit.

2. The sound-generating device according to claim 1, wherein: The frame is a rectangular structure, and the first mounting through hole and the second mounting through hole are arranged side by side on the frame.

3. The sound-generating device according to claim 1, characterized in that: The first sound emitting unit and the second sound emitting unit are both rectangular structures, and the long axis direction of the first sound emitting unit is parallel to or perpendicular to the long axis direction of the second sound emitting unit.

4. The sound-generating device according to claim 1, wherein: The relationship between the resonance frequency F0 of the first sound emitting unit and the resonance frequency F0' of the second sound emitting unit is F0≥2F0'.

5. The sound-generating device according to claim 1, characterized in that: The sound radiation area Sd of the first sound emitting unit is smaller than the sound radiation area Sd' of the second sound emitting unit.

6. The sound-generating device according to claim 1, wherein: The equivalent mass Mms of the first vibration system is smaller than the equivalent mass Mms' of the second vibration system.

7. The sound-generating device according to claim 1, characterized in that: The first vibration system includes a first diaphragm, and the second vibration system includes a second diaphragm; The first diaphragm and the second diaphragm are provided separately; Alternatively, the first diaphragm and the second diaphragm are integrally arranged, the first diaphragm and the second diaphragm are connected by a connecting portion, the frame is provided with a connecting wall between the first mounting through hole and the second mounting through hole, and the connecting portion is fixed on the connecting wall.

8. The sound-generating device according to claim 1, wherein: The first vibration system further includes a first voice coil, and the second vibration system further includes a second voice coil. The voice coil wire diameter of the first voice coil is smaller than the voice coil wire diameter of the second voice coil.

9. The sound-generating device according to claim 8, characterized in that: The voice coil wire of the first voice coil is made of copper-clad aluminum, and the voice coil wire of the second voice coil is made of copper wire.

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