An electronic device

Abstract

The invention discloses an electronic device. The device comprises: a shell; a sound-generating device arranged in the shell, the sound-generating device comprises a shell, a magnetic circuit system arranged in the shell, a first vibration system and a second vibration system, the first vibration system and the second vibration system can radiate sound in the full frequency range of the user's hearing, the first vibration system radiates sound to the outside of the shell along a first direction, and the second vibration system radiates sound to the outside of the shell along a second direction; the first vibration system is a front sound-generating mode, the second vibration system is a side sound-generating mode, the phase difference between the first vibration system and the second vibration system at their respective sound-generating holes is [0, π / 2], the high-frequency cutoff frequency of the first vibration system is greater than or equal to 6kHz, and the high-frequency cutoff frequency of the first vibration system is greater than the high-frequency cutoff frequency of the second vibration system.

Description

Technical Field

[0001] The present invention relates to the technical field of electroacoustic conversion, and more specifically, to an electronic device. Background Art

[0002] In order to provide a better acoustic experience, electronic devices usually have several low-frequency speaker units and high-frequency speaker units in the device. Although this setting method can achieve the expected acoustic performance, the number of speaker units is large, and the space inside the electronic device is large, which affects the layout of other components inside the electronic device.

[0003] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Summary of the invention

[0004] An object of the present invention is to provide a new technical solution for electronic equipment.

[0005] According to a first aspect of the present invention, an electronic device is provided. The electronic device comprises: a housing; a sound-generating device arranged in the housing, the sound-generating device comprises a housing, a magnetic circuit system arranged in the housing, a first vibration system and a second vibration system, the first vibration system and the second vibration system are respectively located on opposite sides of the magnetic circuit system and cooperate with the magnetic circuit system, the first vibration system and the second vibration system can radiate sound within the full frequency range of the user's hearing, the first vibration system radiates sound to the outside of the housing along a first direction, and the second vibration system radiates sound to the outside of the housing along a second direction; the first vibration system is a front sound-generating mode, the second vibration system is a side sound-generating mode, the phase difference between the first vibration system and the second vibration system at their respective sound outlets is [0, π / 2], the high-frequency cutoff frequency of the first vibration system is greater than or equal to 6kHz, and the high-frequency cutoff frequency of the first vibration system is greater than the high-frequency cutoff frequency of the second vibration system.

[0006] Optionally, an angle between the first direction and the second direction is 45°-135°.

[0007] Optionally, there are multiple sound-generating devices, and they are symmetrically arranged with respect to a center line of the electronic device.

[0008] Optionally, the vibration direction of the sound-emitting device is perpendicular to the main plane of the electronic device, or the vibration direction of the sound-emitting device is parallel to the main plane of the electronic device.

[0009] Optionally, the electronic device includes an interactive operation portion and a side wall located on the side of the interactive operation portion, the first vibration system radiates sound outward from a side of the interactive operation portion, and the second vibration system radiates sound outward from a side of the side wall.

[0010] Optionally, the first vibration system and the second vibration system have opposite vibration directions.

[0011] Optionally, the first vibration system is configured to compensate the second vibration system after a high frequency cut-off frequency of the second vibration system.

[0012] Optionally, the first vibration system is configured to compensate the second vibration system when abnormal attenuation of the second vibration system occurs within a resonant frequency range.

[0013] Optionally, the first vibration system and the second vibration system are independently controlled.

[0014] Optionally, the sound-generating device is rectangular, including two opposite long sides and two short sides, the magnetic circuit system includes a central magnet and side magnets, a magnetic yoke is arranged in the housing, the magnetic yoke includes a frame portion with a hollow area and a middle portion opposite to the hollow area and higher than the frame portion, a gap is provided between the central portion and the frame portion, at least two opposite ends of the central portion are fixedly connected to the frame portion through a connecting wall, the central magnet is arranged on the central portion, and the side magnets are arranged at a portion of the frame portion parallel to the long sides. .

[0015] Optionally, the electronic device is a laptop computer, a tablet computer, a mobile phone, a smart watch, a game console, a walkie-talkie or a smart speaker.

[0016] According to an embodiment of the present disclosure, the electronic device can achieve a surround sound effect.

[0017] 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 attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0019] Figure 1 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure.

[0020] Figure 2 is a cross-sectional view of a laterally arranged sound-generating device according to an embodiment of the present disclosure.

[0021] Figure 3 is a cross-sectional view of a longitudinally arranged sound-generating device according to one embodiment of the present disclosure.

[0022] Figure 4-7It is a diagram of sound effects of an electronic device in different scenarios according to an embodiment of the present disclosure.

[0023] Figure 8 2 is a diagram showing the superposition effect of two vibration systems according to an embodiment of the present disclosure.

[0024] Fig. 9 4 is a diagram showing the compensation effect of two vibration systems according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0025] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that 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 unless otherwise specifically stated.

[0026] 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.

[0027] 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 as part of the specification.

[0028] 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.

[0029] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0030] According to an embodiment of the present disclosure, an electronic device is provided. The electronic device may be, but is not limited to, a laptop, a tablet computer, a mobile phone, a smart watch, a game console, a walkie-talkie, or a smart speaker. The following description will be made by taking a laptop as an example.

[0031] like Figure 1 As shown, the electronic device includes a housing and a sound-generating device 10 arranged in the housing.

[0032] like Figure 2-3As shown, the sound-generating device 10 includes a housing 29, a magnetic circuit system disposed in the housing 29, a first vibration system, and a second vibration system. The housing 29 has a cavity inside. The magnetic circuit system is fixed in the cavity. The magnetic circuit system is used to form a magnetic gap. The first vibration system and the second vibration system are respectively located on opposite sides of the magnetic circuit system and cooperate with the magnetic circuit system. After power is turned on, the two vibration systems vibrate under the action of the Ampere force in the magnetic field of the magnetic circuit system.

[0033] The first vibration system and the second vibration system can radiate sound in the full frequency range of the user's hearing. Compared with radiating sound only in the high frequency or low frequency band, the sound-generating device has a wider sound range.

[0034] The first vibration system radiates sound outside the housing along a first direction. The second vibration system radiates sound outside the housing along a second direction. The first direction and the second direction are different directions relative to the housing.

[0035] The first vibration system is a front sound emitting mode. For example, a front sound emitting hole 12 is provided on the housing 29, and the front sound emitting hole 12 is located directly above the first vibration system. The second vibration system is a side sound emitting mode. For example, the second vibration system radiates sound outward through the side sound emitting channel 13 of the housing.

[0036] The phase difference between the first vibration system and the second vibration system at the sound outlet is [0, π / 2], and the high frequency cutoff frequency Fh of the first vibration system 正 ≥6kHz, and the high-frequency cutoff frequency of the first vibration system is greater than the high-frequency cutoff frequency of the second vibration system. It is well known to those skilled in the art that the acoustic signal is a periodic signal, and this interval can be expanded to [0±2nπ, π / 2±2nπ], n=0,1,2,3……. The phase difference of the acoustic signals generated by the first vibration system and the second vibration system in the frequency band before 6kHz at their respective sound outlets is between [0, π / 2], and the phase difference in the frequency band after 6kHz is also between [0, π / 2].

[0037] In the resonant frequency range, the first vibration system and the second vibration system are superimposed on each other, which makes the sound-generating device louder.

[0038] The first vibration system is configured to compensate the second vibration system after a high frequency cutoff frequency of the second vibration system. Figure 8 As shown in the figure, a is the side sound frequency response curve, that is, the frequency response curve of the second vibration system. b is the front sound frequency response curve, that is, the frequency response curve of the first vibration system. c is the total frequency response curve.

[0039] It can be seen from curve a that the curve drops rapidly after the high-frequency cutoff frequency. This attenuation trend is caused by the resonance of the side sound channel. In this example, since the high-frequency cutoff frequency of the first vibration system is greater than the high-frequency cutoff frequency of the second vibration system, the first vibration system can effectively compensate for the attenuation of the second vibration system after the high-frequency cutoff frequency, thereby effectively improving the high-frequency performance of the sound-generating device. Figure 8 As shown in the c curve.

[0040] In this example, the sound-generating device 10 includes two vibration systems, which share a magnetic circuit system and radiate sound in different directions, respectively. Therefore, higher acoustic performance can be obtained at a smaller amplitude and the reliability is high.

[0041] In addition, the sound-generating device 10 has a low height, a small volume, and strong adaptability.

[0042] In addition, the two vibration systems radiate sound in different directions, which can achieve a surround sound effect.

[0043] Due to the structural characteristics of the side sound channel 13, the second vibration system will have peaks and troughs at high frequencies, causing the sound effect of the sound-emitting device to be reduced.

[0044] In one example, the first vibration system is configured to compensate the second vibration system when the second vibration system is abnormally attenuated within the resonant frequency range. In this way, the trough can be effectively compensated, so that the sound effect of the electronic device is better.

[0045] like Fig. 9 As shown, curve a is the frequency response curve of the second vibration system with an abnormality; curve b is the compensated frequency response curve of the first vibration system; and curve c is the frequency response curve after superposition. In this example, due to the structural characteristics of the sound-emitting device, especially the structural characteristics of the side sound channel, the frequency response curve of the second vibration system has a trough in a certain frequency band within the resonant frequency range. The second vibration system is compensated by adjusting the output power of the first vibration system. In this way, after the frequency response curves of the two vibration systems are superimposed, the trough that appears in the second vibration system is effectively compensated and almost disappears, as shown in the figure. Fig. 9 As shown in the c curve.

[0046] In one example, the angle between the first direction and the second direction is 45°-135°. With respect to the two vibration systems radiating sound in the same direction or in opposite directions, within this angle range, the sounds emitted by the two vibration systems will not interfere with each other, and the superposition effect is good.

[0047] For example, the first direction is perpendicular to the second direction, so that the sounds radiated by the two vibration systems will not cancel each other out, and the superposition effect of the sounds will be better.

[0048] like Figure 3 As shown, the two vibration systems are the first vibration system and the second vibration system. The first vibration system includes a first voice coil 16, a first reinforcement layer 15, a first diaphragm 14 and a first centering support plate 17 connected together. The second vibration system includes a second voice coil 21, a second reinforcement layer 20, a second diaphragm 19 and a second centering support plate 22 connected together. The first diaphragm 14 and the second diaphragm 19 are folded ring diaphragms. The first reinforcement layer 15 is fixed to the center of the first diaphragm 14. The second reinforcement layer 20 is fixed to the center of the second diaphragm 19.

[0049] In this example, the magnetic circuit system is a three-magnetic circuit system, including a central magnet 27 and side magnets 28 located on both sides of the central magnet. The overall shape of the sound-generating device is rectangular, including two long sides and two short sides arranged opposite to each other. The long side is parallel to the long axis, and the short side is parallel to the short axis. The length of the long side is greater than the length of the short side. The side magnet 28 extends along the long side. The central magnet 27 extends along the long side. The two side magnets 28 are respectively located on opposite sides of the central magnet 29.

[0050] The sound-generating device also includes a magnetic yoke. A part of the magnetic yoke is embedded in the housing 29. The magnetic yoke includes a frame portion having a hollow area and a middle portion opposite to the hollow area and higher than the frame portion, a gap is provided between the central portion and the frame portion, at least two opposite ends of the central portion are fixedly connected to the frame portion by a connecting wall, the central magnet is arranged on the central portion, and the side magnets are arranged at a portion of the frame portion parallel to the long side. Specifically, the second side washer 26 is the frame portion. The basin frame 24 is the central portion. The second side washer 26 is annular and is connected to the basin frame 24 at two short sides to form a connecting wall, and the second side washer 26 and the basin frame 24 are spaced apart at the long side. An avoidance space is formed outside the portion where the second side washer 26 is connected to the basin frame 24, and a magnetic gap is formed inside.

[0051] The second side washer 26 and the basin frame 24 are located in different planes. For example, the second side washer 26 and the basin frame 24 are both made of metal material, and the two are integrally formed. For example, on the long side, the inner side surface of the second side washer 26 is flush with the outer side surface of the basin frame 24, which can effectively reduce the width of the magnetic gap and improve the magnetic field strength. A central magnet 27 is arranged on the basin frame 24. A central washer 30 is arranged on the side of the central magnet 27 opposite to the basin frame 24. The basin frame 24 not only plays a supporting role, but also plays a magnetic conductive role. The second side washer 26 is embedded in the outer shell 29 by insert injection molding. A side magnet 28 is arranged on the second side washer 26.

[0052] The first side washer 25 is fixed on the side of the side magnet 28 opposite to the second side washer 26. The free end of the first voice coil 16 is located in the magnetic gap formed by the basin frame 24 and the first side washer 25. The free end of the second voice coil 21 is located in the magnetic gap formed by the center washer 30 and the second side washer 26. The first voice coil 16 and the second voice coil 21 are inserted alternately in the magnetic gap, which effectively saves the internal space and the height of the sound-generating device 10 can be made smaller.

[0053] In addition, since the first voice coil 16 and the second voice coil 21 are arranged alternately, the two voice coils 16 and 21 will not interfere with each other, ensuring that the amplitudes of the first vibration system and the second vibration system are not affected, and the loudness of the sound-generating device is higher.

[0054] In other examples, the whole of the sound-generating device 10 is in the shape of a racetrack, with the arc-shaped side being the short side and the straight side being the long side.

[0055] In an example, Figure 4-7 As shown, the sound generating devices 10 are multiple and are symmetrically arranged relative to the center line of the electronic device. For example, the center line is the center line of the notebook along the width direction (such as Figure 4 There are two sound generating devices 10, which are symmetrically arranged on the left and right sides of the notebook. This arrangement makes the surround sound effect of the electronic device better.

[0056] In other examples, the two sound generating devices 10 may also be symmetrically arranged relative to the center line of the notebook along the length direction, that is, arranged on the upper and lower sides of the notebook. In this way, a good surround sound effect can also be achieved.

[0057] In an example, Figure 4 As shown, the vibration direction of the sound-generating device 10 is perpendicular to the main plane of the electronic device. The main plane is the plane of the main body of the electronic device when in use. The interactive operation part is located on the main plane. For example, the interactive operation part is a keyboard, a touch screen, etc. For example, the plane where the keyboard 11 of a notebook is located, the plane where the screen of a tablet computer is located, etc. In this example, the first vibration system emits sound from the main plane, and the second vibration system emits sound from the side of the shell.

[0058] For example, Figure 1 As shown, the plane where the keyboard 11 of the notebook is located is the main plane, and the side wall 18 is on the side of the keyboard 11. The first vibration system radiates sound outward from the side of the keyboard 11. The second vibration system radiates sound outward from the side of the side wall 18.

[0059] Alternatively, the vibration direction of the sound-generating device 10 is parallel to the main plane of the electronic device. In this example, the first vibration system generates sound from the side of the housing, and the second vibration system generates sound from the main plane. Both of the above methods can achieve a surround sound effect.

[0060] In one example, the first vibration system and the second vibration system vibrate in opposite directions. This vibration mode can effectively offset the vibration of the electronic device caused by the vibration.

[0061] In one example, the first vibration system and the second vibration system are independently controlled. In this way, the electronic device can realize a variety of application scenarios. Figure 4 As shown, in this example, the electronic device includes two sound-generating devices 10a, 10b. The two vibration systems of each sound-generating device 10a or 10b emit sound from the front and side at the same time, thereby achieving full-angle sound generation.

[0062] like Figure 5 As shown, in this example, the first vibration systems of the two sound-emitting devices 10a, 10b are working, and the second vibration systems are not working, thereby forming a front sound source and realizing the front sound emission of the electronic device.

[0063] like Figure 6 As shown, in this example, the second vibration system of the sound-generating device 10a located on the left side works, and the first vibration system does not work. The sound-generating device 10b located on the right side does not work, thereby forming a left sound source and realizing the left sound of the electronic device.

[0064] like Figure 7 As shown, in this example, the second vibration system of the sound-generating device 10b located on the right side works, and the first vibration system does not work. The sound-generating device 10a located on the left side does not work, thereby forming a right-side sound source, realizing the right-side sound generation of the electronic device.

[0065] By switching the above-mentioned multiple sound source modes according to different playback content, the surround sound effect of the electronic device can be achieved, thereby improving the user experience.

[0066] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated 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 will be appreciated by those skilled in the art that the above embodiments may be modified 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. An electronic device, wherein: include: case; a sound-generating device disposed in the shell, the sound-generating device comprising a shell, a magnetic circuit system disposed in the shell, a first vibration system, and a second vibration system, the first vibration system and the second vibration system being respectively located on opposite sides of the magnetic circuit system and cooperating with the magnetic circuit system, the first vibration system and the second vibration system being configured to radiate sound within the full frequency range of a user's hearing, the first vibration system radiating sound outside the shell along a first direction, and the second vibration system radiating sound outside the shell along a second direction; the first vibration system and the second vibration system have opposite vibration directions, and the angle between the first direction and the second direction is 45°-135°; The first vibration system is in a front-out sound emitting mode, the second vibration system is in a side-out sound emitting mode, the phase difference of the sound signals generated by the first vibration system and the second vibration system at their respective sound outlets is [0, π / 2], the high-frequency cutoff frequency of the first vibration system is greater than or equal to 6kHz, and the high-frequency cutoff frequency of the first vibration system is greater than the high-frequency cutoff frequency of the second vibration system.

2. The electronic device according to claim 1, wherein: There are multiple sound-generating devices, which are symmetrically arranged relative to the center line of the electronic device.

3. The electronic device according to claim 1, wherein: The vibration direction of the sound-generating device is perpendicular to the main plane of the electronic device, or the vibration direction of the sound-generating device is parallel to the main plane of the electronic device.

4. The electronic device according to claim 1, wherein: The electronic device includes an interactive operation portion and a side wall located on the side of the interactive operation portion, the first vibration system radiates sound outward from a side of the interactive operation portion, and the second vibration system radiates sound outward from a side of the side wall.

5. The electronic device according to claim 1, wherein: The first vibration system is configured to compensate the second vibration system after a high frequency cutoff frequency of the second vibration system.

6. The electronic device according to claim 1, wherein: The first vibration system is configured to compensate the second vibration system when abnormal attenuation of the second vibration system occurs within a resonant frequency range.

7. The electronic device according to claim 1, wherein: The first vibration system and the second vibration system are independently controlled.

8. The electronic device according to claim 1, wherein: The sound-generating device is rectangular, including two opposite long sides and two short sides. The magnetic circuit system includes a central magnet and side magnets. A magnetic yoke is arranged in the outer shell. The magnetic yoke includes a frame portion with a hollow area and a middle portion opposite to the hollow area and higher than the frame portion. There is a gap between the central portion and the frame portion. At least two opposite ends of the central portion are fixedly connected to the frame portion by connecting walls. The central magnet is arranged on the central portion, and the side magnets are arranged at a position of the frame portion parallel to the long sides.

9. The electronic device according to claim 1, wherein: The electronic device is a laptop computer, a tablet computer, a mobile phone, a smart watch, a game console, a walkie-talkie or a smart speaker.

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