Sound generating device and electronic device

Abstract

The embodiments of the present application disclose a sound-generating device and an electronic device; wherein the sound-generating device comprises a first sleeve, a second sleeve, a first connecting shaft, a second connecting shaft and a driving mechanism, wherein the first sleeve and the second sleeve are arranged opposite to each other, a first diaphragm is arranged in the first sleeve, a second diaphragm is arranged in the second sleeve, the first diaphragm is connected to the first connecting shaft, the second diaphragm is connected to the second connecting shaft, a first sound outlet hole opposite to the first diaphragm is arranged on the first sleeve, a second sound outlet hole opposite to the second diaphragm is arranged on the second sleeve, and the first sound outlet hole and the second sound outlet hole are arranged opposite to each other; the driving mechanism is arranged between the first sleeve and the second sleeve, the driving mechanism is connected to the first connecting shaft and the second connecting shaft respectively, and the driving mechanism is used to drive the first connecting shaft and the second connecting shaft to move away from or approach each other, so as to drive the first diaphragm and the second diaphragm to vibrate.

Description

Technical Field

[0001] The present application belongs to the technical field of terminal equipment, and specifically relates to a sound-generating device and an electronic device. Background Art

[0002] At present, most electronic devices with audio external speaker function have the problem of poor external sound effect experience. The main reason is that the speakers or receivers used in electronic devices are unidirectional, and the sound can only be transmitted from one channel, which cannot achieve a realistic sound scene, thereby reducing the sound experience. In related technologies, the main solution to improve the sound effect of electronic devices is to use large-sized speakers. Although this can improve the sound experience, due to the limitation of the internal space size of electronic devices (such as smart watches, which have a smaller internal space), the large-sized speaker design obviously cannot meet the needs.

[0003] The common principle of sound generation is actually based on electroacoustic conversion. When different electronic energies are transmitted to the coil of the speaker, the coil can generate a kind of energy that interacts with the magnetic field of the magnet, and this interaction can cause the paper plate to vibrate. Because the electronic energy changes at any time, the coil of the speaker will move forward or backward, so the paper plate of the speaker will move with it. This action changes the density of the air and produces sound. However, the current structure needs to rely on magnets and coils, has high manufacturing process requirements, and a complex structure. Slight size differences or insufficient assembly process control will cause reliability problems and performance problems such as noise. At the same time, due to the existence of magnetic and electric fields, it will interfere with and affect the circuits and devices around the electronic equipment. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a sound-emitting device and an electronic device, which at least solves the problem that the existing sound-emitting devices use one-way sound emission, resulting in poor external sound effect experience.

[0005] In a first aspect, an embodiment of the present application provides a sound-generating device, the sound-generating device comprising:

[0006] A first sleeve and a second sleeve, wherein the first sleeve and the second sleeve are arranged opposite to each other, a first diaphragm is arranged in the first sleeve, and a second diaphragm is arranged in the second sleeve;

[0007] a first connecting shaft and a second connecting shaft, the first diaphragm is connected to the first connecting shaft, the second diaphragm is connected to the second connecting shaft, the first sleeve is provided with a first sound outlet hole opposite to the first diaphragm, the second sleeve is provided with a second sound outlet hole opposite to the second diaphragm, and the first sound outlet hole and the second sound outlet hole are arranged opposite to each other; and

[0008] A driving mechanism is disposed between the first sleeve and the second sleeve, and is connected to the first connecting shaft and the second connecting shaft respectively. The driving mechanism is used to drive the first connecting shaft and the second connecting shaft to move away from or toward each other, so as to drive the first diaphragm and the second diaphragm to vibrate.

[0009] In a second aspect, an embodiment of the present application provides an electronic device, the electronic device comprising:

[0010] The device body; and

[0011] As described above, the sound-generating device is arranged in the device body.

[0012] In an embodiment of the present application, a sound-emitting device is provided, which can emit sound in two directions at the same time, so that the user can hear the sound in different directions, and the user's sound experience can be improved when playing the sound externally; at the same time, compared with traditional speakers, the sound-emitting device provided in the embodiment of the present application does not generate magnetic fields and electric fields because it has no magnetic steel or coil, and when it is applied to electronic equipment, it will not interfere with surrounding circuits and devices.

[0013] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0015] Figure 1 It is one of the structural schematic diagrams of the sound-generating device provided in the embodiment of the present application;

[0016] Figure 2 This is the second structural schematic diagram of the sound-generating device provided in the embodiment of the present application;

[0017] Figure 3 This is the third structural schematic diagram of the sound-generating device provided in the embodiment of the present application;

[0018] Figure 4 is a schematic diagram of the movement process of the pusher provided in the embodiment of the present application;

[0019] Figure 5 It is one of the structural schematic diagrams of a form of a driving unit provided in an embodiment of the present application;

[0020] Figure 6 This is a second structural schematic diagram of a form of a driving unit provided in an embodiment of the present application;

[0021] Figure 7 This is one of the schematic diagrams of the working principle of the driving unit provided in the embodiment of the present application;

[0022] Figure 8 This is the second schematic diagram of the working principle of the driving unit provided in the embodiment of the present application;

[0023] Fig. 9 It is a structural diagram of a form of electronic equipment provided by an embodiment of the present application;

[0024] Fig.10 yes Fig. 9 Side view of.

[0025] Reference numerals:

[0026] 1. First sleeve; 2. Second sleeve; 3. First diaphragm; 4. First connecting shaft; 5. Second diaphragm; 6. Second connecting shaft; 7. First sound outlet; 8. Second sound outlet; 9. Driving mechanism; 901. Driving unit; 9011. Piezoelectric ceramic layer; 9012. Elastomer layer; 9013. Wear-resistant material layer; 902. Rotating shaft; 903. Pusher; 904. Connecting rod assembly; 9041. Hinge end; 10. Third sleeve; 11. Fourth sleeve; 12. Rotating wheel; 13. Third connecting shaft; 14. Fourth connecting shaft; 15. Equipment body; 1501. Display assembly; 1502. Shell; 16. First through hole; 17. Second through hole; 18. Watch strap. DETAILED DESCRIPTION

[0027] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0028] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] The following is combined with Figure 1 To Attachment Fig.10 , the sound-emitting device and the electronic device provided in the embodiments of the present application are described in detail through specific embodiments and their application scenarios.

[0032] According to an embodiment of the present application, a sound generating device is provided. Figures 1 to 4 The sound-generating device comprises a first sleeve 1 and a second sleeve 2, the first sleeve 1 and the second sleeve 2 are arranged opposite to each other, a first diaphragm 3 is arranged in the first sleeve 1, and a second diaphragm 5 is arranged in the second sleeve 2;

[0033] The sound-generating device further includes a first connecting shaft 4 and a second connecting shaft 6, the first diaphragm 3 is connected to the first connecting shaft 4, the second diaphragm 5 is connected to the second connecting shaft 6, the first sleeve 1 is provided with a first sound outlet hole 7 opposite to the first diaphragm 3, the second sleeve 2 is provided with a second sound outlet hole 8 opposite to the second diaphragm 5, and the first sound outlet hole 7 and the second sound outlet hole 8 are arranged opposite to each other; and

[0034] The sound-generating device also includes a driving mechanism 9, which is arranged between the first sleeve 1 and the second sleeve 2. The driving mechanism 9 is respectively connected to the first connecting shaft 4 and the second connecting shaft 6. The driving mechanism 9 is used to drive the first connecting shaft 4 and the second connecting shaft 6 to move away from or approach each other, so as to drive the first diaphragm 3 and the second diaphragm 5 to vibrate.

[0035] In the embodiment of the present application, two sound-generating sleeves are designed to generate sound in different directions at the same time, thereby realizing the bidirectional sound-generating function of the sound-generating device. It should be noted that the embodiment of the present application is not limited to using two sleeves to generate sound at the same time, and four, six or more sleeves can also be used to achieve the sound-generating function in four, six or more directions, which is not limited in the embodiment of the present application.

[0036] In the embodiment of the present application, a new type of sound-emitting device is provided, which can emit sound in two directions at the same time, so that the user can hear the sound in different directions, and can improve the user's sound experience when the sound is played out. At the same time, compared with the traditional sound-emitting device, the sound-emitting device solution provided in the embodiment of the present application does not generate magnetic fields and electric fields because it has no magnetic steel and coils, and when it is applied to electronic devices, it will not interfere with surrounding circuits and devices.

[0037] In an embodiment of the present application, the driving mechanism 9 is arranged between the first sleeve 1 and the second sleeve 2, and can simultaneously drive the first connecting shaft 4 and the second connecting shaft 6 on both sides to move back and forth, thereby driving the first diaphragm 3 and the second diaphragm 5 to vibrate at the same time, thereby pushing the air to produce sound. Since the first diaphragm 3 and the second diaphragm 5 can vibrate and make sound at the same time, this is also conducive to enhancing the volume and improving the listening experience.

[0038] In addition, the sound-generating device provided in the embodiment of the present application involves fewer parts, has a simple matching relationship, is easy to assemble and automate production, and can reduce production costs.

[0039] The first diaphragm 3 is installed inside the first sleeve 1, and the inner cavity of the first sleeve 1 can provide a vibration space for the first diaphragm 3. The second diaphragm 5 is installed inside the second sleeve 2, and the inner cavity of the second sleeve 2 can provide a vibration space for the second diaphragm 5. The first diaphragm 3 and the second diaphragm 5 can continuously compress air during the vibration process, thereby generating sound.

[0040] The first sound outlet 7 is provided on the first sleeve 1 and is arranged opposite to the first diaphragm 3, and the second sound outlet 8 is provided on the second sleeve 2 and is arranged opposite to the second diaphragm 5. The first sound outlet 7 and the second sound outlet 8 can be used to transmit the sound generated in the first sleeve 1 and the second sleeve 2, respectively. Since the first sound outlet 7 and the second sound outlet 8 are designed in different directions, such as being arranged opposite to each other (i.e., the sound emitting directions are opposite), the sound of the two sleeves can be transmitted from different directions.

[0041] It should be noted that the first sound outlet hole 7 and the second sound outlet hole 8 can be flexibly set to one or more according to specific needs, and there is no limitation on this in the embodiment of the present application.

[0042] In addition, the size and shape of the first sound outlet hole 7 and the second sound outlet hole 8 can also be adjusted according to specific needs, which is not limited in the embodiment of the present application.

[0043] For example, the first sleeve 1 , the second sleeve 2 , and the driving mechanism 9 may be fixedly mounted on a bracket, and the bracket provides support for the first sleeve 1 , the second sleeve 2 , and the driving mechanism 9 .

[0044] In some examples of this application, see Figures 1 to 4 The driving mechanism 9 includes a driving part 901, a rotating shaft 902, a pushing member 903 and a connecting rod assembly 904. The driving part 901 is connected to the pushing member 903 through the rotating shaft 902. The pushing member 903 is rotatably arranged on the connecting rod assembly 904. The pushing member 903 is transmission-connected to the connecting rod assembly 904. The first connecting shaft 4 and the second connecting shaft 6 are connected to both sides of the connecting rod assembly 904.

[0045] Among them, the driving part 901 is used to drive the rotating shaft 902 to drive the pushing member 903 to rotate, and the pushing member 903 can drive the connecting rod assembly 904 to perform telescopic movement to drive the first connecting shaft 4 and the second connecting shaft 6 to move away from or approach each other, so as to drive the first diaphragm 3 and the second diaphragm 5 to vibrate.

[0046] In the embodiment of the present application, the driving mechanism 9 does not include magnetic steel or coils, so that no magnetic field or electric field is generated during operation, and the motion coordination relationship is relatively simple. The rotation of the pusher 903 drives the two sides of the connecting rod assembly 904 to perform telescopic motion, and then the reciprocating motion of the first connecting shaft 4 and the second connecting shaft 6 can drive the first diaphragm 3 and the second diaphragm 5 to vibrate simultaneously, so as to realize the sound-generating function of the two sleeves.

[0047] See also Figures 2 to 4 As the direction of the pusher 903 changes during the rotation process, the first diaphragm 3 and the second diaphragm 5 can continuously compress the air inside their respective sleeves to generate sound through cooperation with the connecting rod assembly 904. The sound generated by the first diaphragm 3 is transmitted to the outside through the first sound outlet 7, and at the same time, the sound generated by the second diaphragm 5 is transmitted to the outside through the second sound outlet 8, ultimately achieving the function of bidirectional sound generation when the sound generating device emits sound externally.

[0048] In some examples of this application, see Figures 2 to 4 The sound-generating device further comprises a third sleeve 10 and a fourth sleeve 11 which are arranged opposite to each other, wherein the first sleeve 1 and the second sleeve 2 are arranged in a first direction, at which time, the third sleeve 10 and the fourth sleeve 11 are arranged in a second direction, the second direction is perpendicular to the first direction, and the third sleeve 10 and the fourth sleeve 11 are connected to the connecting rod assembly 904;

[0049] The pushing member 903 can be rotated and switched between the first direction and the second direction;

[0050] When the pushing member 903 rotates to the first direction, the two ends of the pushing member 903 drive the connecting rod assembly 904 to extend in the first direction, so as to drive the first connecting shaft 4 and the second connecting shaft 6 to move away from each other;

[0051] When the pushing member 903 rotates to the second direction, the two ends of the pushing member 903 abut against the third sleeve 10 and the fourth sleeve 11 respectively, and the connecting rod assembly 904 contracts in the first direction to drive the first connecting shaft 4 and the second connecting shaft 6 to approach each other.

[0052] The sound-generating device provided in the embodiment of the present application, in addition to being provided with two sleeves that can generate sound, namely, the first sleeve 1 and the second sleeve 2, can also be provided with the third sleeve 10 and the fourth sleeve 11, wherein the setting directions of the third sleeve 10 and the fourth sleeve 11 are different from the setting directions of the first sleeve 1 and the second sleeve 2, for example, they are designed to differ by 90° in the setting directions.

[0053] The third sleeve 10 and the fourth sleeve 11 may not have diaphragms disposed therein, and in this case, the third sleeve 10 and the fourth sleeve 11 may not be used for sound generation.

[0054] It can be understood that when the pushing member 903 turns from the first direction to the second direction after rotating 90°, the two ends of the pushing member 903 release the support on the two sides of the connecting rod assembly 904 in the first direction, and the two ends of the pushing member 903 can simultaneously support the other two sides of the connecting rod assembly 904 (on both sides of the second direction). In this process, the connecting rod assembly 904 shows a contraction movement in the first direction, thereby reducing the distance between the first connecting shaft 4 and the second connecting shaft 6, that is, the two produce a translational movement towards each other; at the same time, the pushing member 903 also allows the connecting rod assembly 904 to extend in the second direction, and the third sleeve 10 and the fourth sleeve 11 respectively resist the two ends of the pushing member 903.

[0055] The pusher 903 can drive the connecting rod assembly 904 to perform telescopic movement in the first direction during the rotation process, and with the telescopic movement of the connecting rod assembly 904 in the first direction, the first connecting shaft 4 and the second connecting shaft 6 can simultaneously drive the first diaphragm 3 and the second diaphragm 5 to vibrate in the first direction, so that the first sleeve 1 and the second sleeve 2 can make a sound. When the pusher 903 rotates to the second direction, the third sleeve 10 and the fourth sleeve 11 can abut against the two ends of the pusher 903, and since no diaphragm is provided inside the third sleeve 10 and the fourth sleeve 11, no sound is produced.

[0056] Of course, diaphragms may also be provided in the third sleeve 10 and the fourth sleeve 11, respectively. In this case, the pusher 903 may also simultaneously drive the diaphragms in the third sleeve 10 and the fourth sleeve 11 to reciprocate along the second direction when rotating, so as to achieve the same sound-generating function as the first sleeve 1 and the second sleeve 2. Those skilled in the art may flexibly adjust the number of sound-generating sleeves as needed, and this is not limited in the embodiments of the present application.

[0057] When the pushing member 903 rotates, the rotation direction thereof can be clockwise or counterclockwise, which is not limited in the embodiment of the present application.

[0058] It should be noted that the third sleeve 10 and the fourth sleeve 11 have the same structure.

[0059] For the sound-generating device provided in the embodiment of the present application, the third sleeve 10 and the fourth sleeve 11 can be optionally provided according to specific needs, and of course, they may not be provided.

[0060] In some examples of this application, see Figures 2 to 4 The connecting rod assembly 904 includes four connecting rods, and the four connecting rods are hinged at the head and tail through the rotating wheel 12 to form a diamond structure. The connecting rod assembly 904 has four hinged ends; the first connecting shaft 4, the second connecting shaft 6, the third sleeve 10 and the fourth sleeve 11 are respectively connected to the four hinged ends;

[0061] The pushing member 903 forms a transmission cooperation with the four hinged ends respectively.

[0062] The connecting rod assembly 904 provided in the embodiment of the present application is a diamond-shaped four-bar linkage. Thus, four hinged ends are formed on the connecting rod assembly 904, and the hinged member of each hinged end is the rotating wheel 12. Based on the characteristics of the diamond structure, the four hinged ends are arranged opposite to each other in pairs; two of the hinged ends are arranged along the first direction, respectively used to connect the first connecting shaft 4 and the second connecting shaft 6; the other two hinged ends are arranged along the second direction, respectively used to connect the third sleeve 10 and the fourth sleeve 11.

[0063] See also Figure 2 When the pushing member 903 is in the first direction, the two ends of the pushing member 903 respectively support the two hinged ends of the connecting rod assembly 904 arranged along the first direction. Figure 4 Taking one of the hinged ends as an example, when the end of the pushing member 903 pushes the hinged end, the two connecting rods hinged to the hinged end can move around the rotating wheel 12, the angle between the two connecting rods will decrease, and the connecting rod assembly 904 will produce elongation deformation in the first direction.

[0064] Please continue to see Figure 4 When the pushing member 903 rotates to the second direction, the two ends of the pushing member 903 release the supporting effect on the two hinged ends of the connecting rod assembly 904 arranged along the first direction. Continuing to use one of the hinged ends as an example, the two connecting rods hinged to the hinged end can move around the rotating wheel 12, the angle formed by the two connecting rods increases, and the connecting rod assembly 904 shrinks and deforms in the first direction.

[0065] In some examples of this application, see Figure 2 The third sleeve 10 and the fourth sleeve 11 are both hollow structures; a third connecting shaft 13 is slidably provided in the third sleeve 10, and a fourth connecting shaft 14 is slidably provided in the fourth sleeve 11, and the third connecting shaft 13 and the fourth connecting shaft 14 are respectively connected to two of the hinged ends of the connecting rod assembly 904.

[0066] When no diaphragm is provided in the third sleeve 10 and the fourth sleeve 11, the interior thereof can be provided with a cavity structure, thus forming two cavities which can be used to place other components such as a vibration motor.

[0067] Furthermore, the third sleeve 10 is slidably provided with the third connecting shaft 13, and the fourth sleeve 11 is slidably provided with the fourth connecting shaft 14, so that when the pusher 903 drives the connecting rod assembly 904 to telescopically move in the second direction, the third connecting shaft 13 and the fourth connecting shaft 14 can move in a direction away from or close to each other to prevent the third sleeve 10 and the fourth sleeve 11 from moving. In this way, each sleeve of the sound-generating device can be directly fixed and installed at a corresponding position in the electronic device.

[0068] In addition, when necessary, a diaphragm can be set inside the third sleeve 10 and the fourth sleeve 11, and the third connecting shaft 13 and the fourth connecting shaft 14 can simultaneously drive the diaphragm to vibrate in the second direction to realize the sound-generating function of the third sleeve 10 and the fourth sleeve 11.

[0069] In some examples of this application, see Figure 2 The two sides of the middle of the pushing member 903 are concave to form an arc-shaped portion, and an axial hole is opened in the middle of the pushing member 903, and the rotating shaft 902 is connected to the axial hole; both ends of the pushing member 903 are set as arc-shaped portions.

[0070] See also Figure 2 and Figure 4 The pusher 903 is, for example, a rotating disk, the width of the two ends of which is greater than the width of the middle region. The middle portion of the pusher 903 is connected to the rotating shaft 902, the driving unit 901 can drive the rotating shaft 902 to rotate, and the rotating shaft 902 drives the pusher 903 to rotate on the connecting rod assembly 904, and both ends of the pusher 903 are designed to be relatively large arcs, which can form a transmission match with each of the hinged ends of the connecting rod assembly 904, and it is also relatively smooth and easy to rotate away from the hinged end.

[0071] In some examples of the present application, the driving unit 901 is configured as a piezoelectric motor or a motor module.

[0072] In addition, the driving part 901 may also be a hydraulic cylinder, and the specific form of the driving part 901 is not limited in the embodiment of the present application.

[0073] In some examples of this application, see Figure 5 and Figure 6 The driving part 901 is a piezoelectric ceramic motor, which includes a stacked piezoelectric ceramic layer 9011, an elastic layer 9012 and a wear-resistant material layer 9013, and the rotating shaft 902 is bonded and fixed to the wear-resistant material layer 9013.

[0074] The piezoelectric ceramic layer 9011 is, for example, configured as a ring structure.

[0075] The sound-generating device provided in the embodiment of the present application, when working, the piezoelectric ceramic motor (i.e., the driving part 901) is energized to drive the rotating shaft 902 to rotate, and the rotating shaft 902 drives the pushing member 903 to rotate on the connecting rod assembly 904, so that the connecting rod assembly 904 performs telescopic movement in the first direction, thereby driving the first diaphragm 3 and the second diaphragm 5 to vibrate and produce sound at the same time.

[0076] Piezoelectric ceramic motors have the characteristics of small size, long life, good stability and low noise.

[0077] In the embodiment of the present application, a piezoelectric ceramic motor is used as a power source, which can not only save space and reduce the volume of the sound-emitting device, but also make the movement of the first connecting shaft 4 and the second connecting shaft 6 more stable, and thus make the vibration of the first diaphragm 3 and the second diaphragm 5 more stable, which is beneficial to improving the acoustic effect of the sound-emitting device.

[0078] See also Figure 5 and Figure 6 In an embodiment of the present application, the piezoelectric ceramic motor includes a piezoelectric ceramic layer 9011, an elastomer layer 9012 and a wear-resistant material layer 9013. A high-frequency power supply is added to the piezoelectric ceramic layer 9011 to generate ultrasonic vibrations of tens of millions of hertz using the inverse piezoelectric effect.

[0079] The material of the piezoelectric ceramic layer 9011 may be at least one of the following: BaTiO3, PZT.

[0080] The elastic layer 9012 is a deformable material (such as a copper sheet), which is attached to the surface of the piezoelectric ceramic layer 9011 to increase the deformation amount. Whether to use it can be selected according to actual needs.

[0081] The wear-resistant material layer 9013 is bonded to the surface of the rotating shaft 902 and will come into frictional contact with the elastic layer 9012 during movement to provide a force for movement. The wear-resistant material layer 9013 may be made of carbon nanomaterials.

[0082] Piezoelectric ceramic material is a kind of piezoelectric material, which is a material that converts electrical energy into mechanical energy. That is, applying a mechanical stress to the piezoelectric material will generate an electric field on the surface of the material. This phenomenon is called the positive effect of the piezoelectric material. Conversely, when an electric field is applied to the piezoelectric material, the piezoelectric material will also produce mechanical deformation. This phenomenon is called the reverse effect of the piezoelectric material.

[0083] In the examples of this application, see Figure 7, utilizing the inverse piezoelectric effect of the piezoelectric ceramic layer 9011, an electric field with the same polarization direction is applied to the piezoelectric ceramic layer 9011, the polarization intensity increases, and the piezoelectric ceramic layer 9011 undergoes elongation deformation; when an electric field with a different polarization direction is applied to the piezoelectric ceramic layer 9011, the piezoelectric ceramic layer 9011 undergoes shortening.

[0084] See also Figure 8 The annular piezoelectric ceramic layer 9011 can be polarized into two phase regions, A and B. There is a λ / 4 region between the two phases that is not polarized and is used as a sensor for controlling the feedback signal of the power supply. The other 3λ / 4 wavelength region is used as a common region.

[0085] A ring-shaped piezoelectric ceramic layer 9011 with opposite polarization directions is pasted on the elastomer layer 9012. When an electric signal is applied to the piezoelectric ceramic layer 9011 from the outside, the piezoelectric ceramic layer 9011 will alternately expand and contract (the amplitude of each vibration is about 2-5 microns, and it expands and contracts about 7W-10W times per second, and the displacement can reach several centimeters per second, meeting product requirements). Under certain frequency and voltage conditions, the elastomer layer 9012 forms a traveling wave that rotates along the circumference of the ring, so that any point on the surface of the elastomer layer 9012 vibrates ultrasonically along an elliptical trajectory. This vibration causes the wear-resistant material layer 9013 to rotate through the friction between the elastomer layer 9012 and the wear-resistant material layer 9013. The rotating shaft 902 is bonded and fixed to the wear-resistant material layer 9013, so that the rotating shaft 902 and the wear-resistant material layer 9013 rotate together, thereby driving the pushing member 903 to move.

[0086] In some examples of the present application, the first connecting shaft 4 is slidably disposed in the first sleeve 1 , and the second connecting shaft 6 is slidably disposed in the second sleeve 2 .

[0087] According to another embodiment of the present application, an electronic device is also provided. Fig. 9 and Fig.10 , which includes: a device body 15, and the sound-generating device as described above, wherein the sound-generating device is arranged in the device body 15.

[0088] In some examples of this application, see Fig. 9 and Fig.10 The device body 15 is provided with a first through hole 16 and a second through hole 17 , respectively; wherein the first through hole 16 is connected to the first sound outlet hole 7 , and the second through hole 17 is connected to the second sound outlet hole 8 .

[0089] The first through hole 16 and the second through hole 17 are used for transmitting the sound generated by the sound-generating device. Since the two through holes are oriented in different directions, the electronic device can have a bidirectional sound-generating function, thereby improving the sound-generating effect of the electronic device.

[0090] The electronic device provided in the embodiment of the present application is described by taking a smart watch as an example, see Fig. 9 and Fig.10 The smart watch includes a device body 15, the device body 15 includes a display component 1501 and a housing 1502 arranged below the display component 1501, the housing 1502 contains the electronic components of the smart watch and the sound-generating device provided in the embodiment of the present application, the housing 1502 is connected to a strap 18 on both sides, the first through hole 16 and the second through hole 17 are arranged in a direction perpendicular to the direction of the strap 18, and the first through hole 16 and the second through hole 17 allow the sound generated by the sound-generating device to be transmitted from two different directions. In this way, the smart watch has a two-way sound-generating function, which improves the problem of poor sound-generating effect of existing smart watches.

[0091] It should be noted that the electronic device may be a terminal or other device other than a terminal. Exemplarily, the electronic device may be, for example, a mobile phone, a tablet computer, a laptop computer, a PDA, a vehicle-mounted electronic device, a mobile Internet device (MID), an augmented reality (AR) / virtual reality (VR) device, a robot, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a personal digital assistant (PDA), etc. It may also be a server, a network attached storage (NAS), a personal computer (PC), a television (TV), a teller machine or a self-service machine, etc., and the embodiments of the present application are not specifically limited here.

[0092] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0093] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A sound-generating device, characterized in that: include: A first sleeve (1) and a second sleeve (2), wherein the first sleeve (1) and the second sleeve (2) are arranged opposite to each other, a first diaphragm (3) is arranged in the first sleeve (1), and a second diaphragm (5) is arranged in the second sleeve (2); a first connecting shaft (4) and a second connecting shaft (6), the first diaphragm (3) being connected to the first connecting shaft (4), the second diaphragm (5) being connected to the second connecting shaft (6), the first sleeve (1) being provided with a first sound outlet hole (7) opposite to the first diaphragm (3), the second sleeve (2) being provided with a second sound outlet hole (8) opposite to the second diaphragm (5), the first sound outlet hole (7) and the second sound outlet hole (8) being arranged opposite to each other; and a driving mechanism (9), the driving mechanism (9) being arranged between the first sleeve (1) and the second sleeve (2), the driving mechanism (9) being connected to the first connecting shaft (4) and the second connecting shaft (6) respectively, the driving mechanism (9) being used to drive the first connecting shaft (4) and the second connecting shaft (6) to move away from or approach each other, so as to drive the first diaphragm (3) and the second diaphragm (5) to vibrate; The driving mechanism (9) comprises a pushing member (903) and a connecting rod assembly (904); the pushing member (903) is rotatably arranged on the connecting rod assembly (904); the pushing member (903) is transmission-connected to the connecting rod assembly (904); both sides of the middle portion of the pushing member (903) are concave to form an arc-shaped portion; and both ends of the pushing member (903) are arranged as arc-shaped portions.

2. The sound generating device according to claim 1, characterized in that: The driving mechanism (9) comprises a driving part (901) and a rotating shaft (902); the driving part (901) is connected to the pushing member (903) via the rotating shaft (902); the first connecting shaft (4) and the second connecting shaft (6) are connected to two sides of the connecting rod assembly (904); The driving part (901) is used to drive the rotating shaft (902) to drive the pushing member (903) to rotate, and the pushing member (903) can drive the connecting rod assembly (904) to perform telescopic movement, so as to drive the first connecting shaft (4) and the second connecting shaft (6) to move away from or approach each other, so as to drive the first diaphragm (3) and the second diaphragm (5) to vibrate.

3. The sound-generating device according to claim 2, characterized in that: The sound-generating device further comprises a third sleeve (10) and a fourth sleeve (11) which are arranged opposite to each other; The first sleeve (1) and the second sleeve (2) are arranged in a first direction, the third sleeve (10) and the fourth sleeve (11) are arranged in a second direction, the second direction is perpendicular to the first direction, and the third sleeve (10) and the fourth sleeve (11) are connected to the connecting rod assembly (904); The pushing member (903) is rotatable and switchable between the first direction and the second direction; When the pushing member (903) rotates to the first direction, the two ends of the pushing member (903) drive the connecting rod assembly (904) to extend in the first direction, so as to drive the first connecting shaft (4) and the second connecting shaft (6) to move away from each other; When the pushing member (903) rotates to the second direction, the two ends of the pushing member (903) respectively abut against the third sleeve (10) and the fourth sleeve (11), and the connecting rod assembly (904) contracts in the first direction to drive the first connecting shaft (4) and the second connecting shaft (6) to approach each other.

4. The sound-generating device according to claim 3, characterized in that: The connecting rod assembly (904) comprises four connecting rods, the four connecting rods are hinged at their ends through a rotating wheel (12) to form a diamond structure, and the connecting rod assembly (904) has four hinged ends; The first connecting shaft (4), the second connecting shaft (6), the third sleeve (10) and the fourth sleeve (11) are respectively connected to the four hinged ends of the connecting rod assembly (904); The pushing member (903) forms a transmission fit with the four hinged ends respectively.

5. The sound generating device according to claim 4, characterized in that: The third sleeve (10) and the fourth sleeve (11) are both hollow structures; A third connecting shaft (13) is slidably disposed in the third sleeve (10), and a fourth connecting shaft (14) is slidably disposed in the fourth sleeve (11). The third connecting shaft (13) and the fourth connecting shaft (14) are connected to the two hinged ends of the connecting rod assembly (904).

6. The sound generating device according to claim 4, characterized in that: An axial hole is provided in the middle of the pushing member (903), and the rotating shaft (902) is connected to the axial hole.

7. The sound-generating device according to claim 2, characterized in that: The driving part (901) is a piezoelectric ceramic motor, which comprises a stacked piezoelectric ceramic layer (9011), an elastomer layer (9012) and a wear-resistant material layer (9013), and the rotating shaft (902) is bonded and fixed to the wear-resistant material layer (9013).

8. The sound generating device according to claim 1, characterized in that: The first connecting shaft (4) is slidably disposed in the first sleeve (1), and the second connecting shaft (6) is slidably disposed in the second sleeve (2).

9. An electronic device, characterized in that: include: Device body (15); as well as The sound-generating device according to any one of claims 1 to 8, wherein the sound-generating device is arranged in the device body (15).

10. The electronic device according to claim 9, characterized in that: The device body (15) is provided with a first through hole (16) and a second through hole (17); The first through hole (16) is in communication with the first sound outlet hole (7), and the second through hole (17) is in communication with the second sound outlet hole (8).

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