Sound box and electronic equipment

Abstract

The invention relates to the technical field of audio, in particular to a sound box and electronic equipment. The sound box comprises: a housing having an accommodating cavity; the loudspeaker is installed in the containing cavity, the containing cavity is divided into a first cavity body and a second cavity body by the loudspeaker, and the loudspeaker is configured to output medium and low frequency band sound; and the flexible piezoelectric film unit is wound on the outer side of the shell, and the flexible piezoelectric film unit is configured to output high-frequency-band sound. The loudspeaker and the flexible piezoelectric film unit of the sound box can respectively output middle and low frequency band sound and high frequency band sound, and the bandwidth is expanded. As the flexible piezoelectric film unit is wound on the outer side of the shell, the high pitch coverage range of the sound box is increased, and the use experience of a user on the sound box is improved. In addition, the sound box does not need to be provided with a plurality of high-pitch moving coil units to meet the omnibearing high-frequency requirement, and the size of the sound box is reduced.

Description

Technical Field

[0001] The present application relates to the field of audio technology, and in particular to a speaker and an electronic device. Background Art

[0002] A speaker is a device that converts audio signals into sound and is widely used in various occasions.

[0003] At present, the speaker is provided with a woofer dynamic unit and a tweeter dynamic unit. The woofer dynamic unit can output low and medium frequency sounds, and the tweeter dynamic unit can output high frequency sounds.

[0004] However, since the wavelength of high-frequency sound is shorter and the directionality is stronger, the coverage range of high-frequency sound is narrower, and only users facing the tweeter dynamic unit can hear the complete high-frequency part of the music. Summary of the invention

[0005] Based on this, the present application provides a speaker and an electronic device to solve the problem of narrow coverage of high-frequency sound output by the speaker in the related art.

[0006] In one aspect, the present application provides a speaker, comprising:

[0007] A housing having a receiving cavity;

[0008] A speaker is installed in the accommodating cavity, the speaker divides the accommodating cavity into a first cavity and a second cavity, and the speaker is configured to output mid- and low-frequency sounds;

[0009] The flexible piezoelectric film unit is wound around the outer side of the shell, and the flexible piezoelectric film unit is configured to output high-frequency sound.

[0010] In a possible implementation, a sound outlet hole is provided on a side wall of the first cavity, and the flexible piezoelectric film unit is disposed around the outside of the second cavity.

[0011] In a possible implementation manner, there is a gap between the main body of the flexible piezoelectric film unit and the shell.

[0012] In a possible implementation, a first support member and a second support member are provided on the outer wall of the shell, one end of the flexible piezoelectric film unit is connected to the side of the first support member facing away from the shell, and the other end of the flexible piezoelectric film unit is connected to the side of the second support member facing away from the shell.

[0013] In a possible implementation, the flexible piezoelectric film unit includes a flexible piezoelectric film, and the flexible piezoelectric film is disposed around the outer side of the second cavity.

[0014] In a possible implementation, the flexible piezoelectric film unit includes a plurality of flexible piezoelectric films, which are arranged in sequence around the center of the housing, and each flexible piezoelectric film is configured to output high-frequency sound.

[0015] In a possible implementation manner, the distances between each flexible piezoelectric film and the center of the housing are equal.

[0016] In a possible implementation, each flexible piezoelectric film is further configured to output an ultrasonic frequency band;

[0017] The speaker also includes a microphone array and a central control unit. The microphone array includes multiple microphones, and the multiple microphones are arranged on the shell in a ring shape around the center of the shell. Each flexible piezoelectric film corresponds to at least one microphone, and each flexible piezoelectric film and each microphone are electrically connected to the central control unit respectively.

[0018] In a possible implementation manner, each flexible piezoelectric film corresponds to a plurality of microphones.

[0019] On the other hand, the present application also provides an electronic device, including an electronic device body and the above-mentioned speaker, wherein the speaker is installed on the electronic device body.

[0020] The present application provides a speaker and an electronic device, wherein the speaker is installed in a housing cavity of a shell, and the speaker divides the housing cavity into a first cavity and a second cavity, wherein the first cavity can function as a front cavity of the speaker, and the second cavity can function as a rear cavity of the speaker. The speaker can output medium and low frequency sounds through the speaker. The speaker is wound with a flexible piezoelectric film unit on the outside of the shell. Due to the characteristics of the piezoelectric material, the flexible piezoelectric film unit vibrates at a high frequency as a whole after an alternating current is passed through it, and the speaker can output high frequency sounds through the flexible piezoelectric film unit. In this way, the speaker and the flexible piezoelectric film unit of the speaker can output medium and low frequency sounds and high frequency sounds respectively, thereby expanding the bandwidth. Since the flexible piezoelectric film unit is wound on the outside of the shell, the high-frequency coverage range of the speaker is increased, thereby increasing the user experience of the speaker. In addition, the speaker does not need to be provided with multiple high-frequency dynamic units to meet the requirements of all-round high frequencies, which is conducive to reducing the volume of the speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a structural schematic diagram of a speaker in the related art;

[0023] Figure 2 A cross-sectional view of a speaker provided in an embodiment of the present application;

[0024] Figure 3 A schematic diagram of the structure of the speaker provided in the embodiment of the present application;

[0025] Figure 4 A frequency response test curve of the flexible piezoelectric film unit provided in an embodiment of the present application;

[0026] Figure 5 The frequency response test curve of the speaker and the flexible piezoelectric film unit in the sound box provided in the embodiment of the present application;

[0027] Figure 6 A simplified top view of a flexible piezoelectric film unit is provided for an embodiment of the present application;

[0028] Figure 7 The frequency response test curve of the flexible piezoelectric film unit measured at different positions provided in the embodiment of the present application;

[0029] Figure 8 The sound pressure level distribution of a traditional tweeter dynamic unit and a flexible piezoelectric film unit provided in an embodiment of the present application.

[0030] Description of reference numerals:

[0031] 100-housing; 110-first cavity; 120-second cavity; 130-sound outlet;

[0032] 200-speakers;

[0033] 300-flexible piezoelectric film unit; 310-flexible piezoelectric film;

[0034] 410-first support member; 420-second support member;

[0035] 510-tweeter dynamic unit. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme in the embodiment of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be 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 this field without making creative work are within the scope of protection of the present application. The embodiments of the present application are described in detail below in conjunction with the drawings.

[0037] 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, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the 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.

[0039] The terms "first", "second", "third" (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0040] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or display comprising a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or display.

[0041] In the prior art, a speaker is provided with a bass dynamic coil unit and a tweeter dynamic coil unit. The bass dynamic coil unit can output mid-low frequency sounds, and the tweeter dynamic coil unit can output high frequency sounds. Figure 1 As shown, the tweeter dynamic unit 510 can be arranged on the shell 100 of the speaker. However, since the wavelength of high-frequency sounds is shorter and the directivity is stronger, the coverage range of the high-frequency sounds output by the tweeter dynamic unit 510 is narrower, and only users facing the tweeter dynamic unit 510 can hear the complete high-frequency part of the music. If the speaker uses a full-range dynamic unit to output high-frequency sounds and mid- and low-frequency sounds at the same time, there is also the problem of narrow coverage of high-frequency sounds. If the speaker is provided with multiple tweeters in the shell 100 to meet the requirements of all-round high frequencies, the multiple tweeters will occupy a larger space inside the shell 100, resulting in a larger volume of the speaker.

[0042] After repeated thinking and verification, the inventor found that if the speaker uses a flexible piezoelectric film unit to output high-frequency sounds, the flexible piezoelectric film unit is wound around the outside of the speaker shell. When the flexible piezoelectric film unit is connected to AC, due to the characteristics of piezoelectric materials, the flexible piezoelectric film unit as a whole vibrates at high frequencies. The speaker can emit multi-directional high-frequency sounds through the flexible piezoelectric film unit, which increases the high-frequency coverage of the speaker and thus increases the user experience of the speaker.

[0043] In view of this, the inventor has designed a sound box and an electronic device, wherein a speaker is installed in a shell of the sound box, and the speaker outputs mid- and low-frequency sounds. A piezoelectric film unit is wound around the outer side of the shell, and the piezoelectric film unit can output multi-directional high-frequency sounds, thereby increasing the high-frequency coverage of the sound box.

[0044] The technical solutions of the speaker and the electronic device provided in the embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0045] Reference Figure 2 and Figure 3 As shown, the speaker provided in the embodiment of the present application includes a housing 100, a speaker 200 and a flexible piezoelectric film unit 300. The housing 100 has a receiving cavity. The speaker 200 is installed in the receiving cavity, and the speaker 200 divides the receiving cavity into a first cavity 110 and a second cavity 120, and the speaker 200 is configured to output mid- and low-frequency sounds. The flexible piezoelectric film unit 300 is arranged around the outside of the housing 100, and the flexible piezoelectric film unit 300 is configured to output high-frequency sounds.

[0046] Exemplarily, the housing 100 may be cylindrical, and the inner wall of the housing 100 defines a receiving cavity. Optionally, a support portion may be convexly provided on the inner wall of the housing 100, and the end of the speaker 200 may be connected to the support portion. It can be understood by those skilled in the art that after the speaker 200 is installed in the receiving cavity, the first cavity 110 separated by the speaker 200 in the receiving cavity can be used as the front cavity of the speaker 200, and the second cavity 120 can be used as the rear cavity of the speaker 200. Of course, this embodiment is only exemplary, and the housing 100 may also be other shapes, such as spherical or other shapes, etc., which can be specifically set according to actual needs.

[0047] Among them, a bass dynamic coil unit can be used as the speaker 200, and the mid- and low-frequency sounds generated by the speaker 200 can be emitted through the first cavity 110.

[0048] It is worth mentioning that the flexible piezoelectric film unit 300 has piezoelectric material properties. The flexible piezoelectric film unit 300 generates high-frequency vibration as a whole after an alternating current is passed through it. The vibration of the flexible piezoelectric film unit 300 can emit high-frequency sounds. Since the flexible piezoelectric film unit 300 is wound around the outside of the housing 100, the flexible piezoelectric film unit 300 can emit high-frequency sounds in multiple directions relative to the center of the housing 100.

[0049] like Figure 4 and Figure 5 As shown, the speaker provided in this embodiment outputs high-frequency sound through the flexible piezoelectric film unit 300, and the speaker can emit sound covering a wider frequency range. Figure 4 It is the frequency response curve of the flexible piezoelectric film unit 300 at 1 m in front of the flexible piezoelectric film unit 300 under the voltage of 5 V. Figure 5 , Woofer is a frequency response test curve of the speaker 200 , and Tweeter is a frequency response test curve of the flexible piezoelectric film unit 300 .

[0050] The speaker provided in this embodiment has a speaker 200 installed in the accommodating cavity of the shell 100. The speaker 200 divides the accommodating cavity into a first cavity 110 and a second cavity 120. The first cavity 110 can play the role of the front cavity of the speaker 200, and the second cavity 120 can play the role of the rear cavity of the speaker 200. The speaker can output low- and medium-frequency sounds through the speaker 200. The speaker is wound with a flexible piezoelectric film unit 300 on the outside of the shell 100. Due to the characteristics of the piezoelectric material, the flexible piezoelectric film unit 300 vibrates at a high frequency as a whole after the alternating current is passed. The speaker can output high-frequency sounds through the flexible piezoelectric film unit 300. In this way, the speaker 200 and the flexible piezoelectric film unit 300 of the speaker can output low- and medium-frequency sounds and high-frequency sounds respectively. The flexible piezoelectric film unit 300 complements the high-frequency frequency response and expands the bandwidth. Since the flexible piezoelectric film unit 300 is wound on the outside of the shell 100, the high-frequency coverage of the speaker is increased, and the user's experience of the speaker is increased. In addition, the speaker does not need to be equipped with multiple tweeter dynamic units to meet the requirements of all-round high frequency, which can save the volume of the accommodating cavity and help reduce the size of the speaker.

[0051] In one embodiment, Figure 2 and Figure 3 As shown, a sound outlet hole 130 is disposed on the side wall of the first cavity 110 , and the flexible piezoelectric film unit 300 is disposed around the outer side of the second cavity 120 .

[0052] There are multiple sound outlet holes 130, and the multiple sound outlet holes 130 are evenly arranged around the axis of the housing 100. It can be understood that the low- and medium-frequency sounds generated by the speaker 200 can be emitted through the sound outlet holes 130 on the side wall of the first cavity 110. The flexible piezoelectric film unit 300 is arranged around the outside of the second cavity 120, so that there is a gap between the flexible piezoelectric film unit 300 and the sound outlet holes 130, and the flexible piezoelectric film unit 300 will not hinder the low- and medium-frequency sounds generated by the speaker 200 from being emitted from the sound outlet holes 130.

[0053] like Figure 7 As shown, the flexible piezoelectric film unit 300 is tested in various directions, with the facing position being 0° and rotating clockwise in sequence. The frequency response curves in various directions are in good agreement. It can be seen that since the flexible piezoelectric film unit 300 is a surround structure, a 360° omnidirectional tweeter can be formed.

[0054] like Figure 8 As shown, Figure 8 In the middle, A is the sound pressure level distribution of the traditional tweeter dynamic unit, and B is the sound pressure level distribution of the flexible piezoelectric film unit 300. Figure 8It is shown that the traditional dynamic tweeter has a narrow directional range, with a higher sound pressure level distribution in front of it and a stronger sound, while the sound pressure level distribution in other areas is smaller. However, the flexible piezoelectric film unit 300 is evenly distributed in the entire field, and can achieve 360° omnidirectional tweeters.

[0055] In this embodiment, the flexible piezoelectric film unit 300 is formed in a ring shape, and the housing 100 is located inside the ring shape. When an alternating current is applied to the flexible piezoelectric film unit 300, the flexible piezoelectric film unit 300 can output 360° omnidirectional high-frequency sounds. The speaker can output 360° omnidirectional high-frequency sounds, so that the user can hear the complete high-frequency part of the music in all directions around the speaker.

[0056] In other embodiments, the flexible piezoelectric film unit 300 may also be disposed around the outside of the first cavity 110 , but there is a gap between the flexible piezoelectric film unit 300 and the sound outlet 130 .

[0057] In a specific embodiment, Figure 2 and Figure 3 As shown, there is a gap between the main body of the flexible piezoelectric film unit 300 and the housing 100 .

[0058] Among them, the specific size of the interval between the main part of the flexible piezoelectric film unit 300 and the housing 100 can be set as needed, and is not limited here. It can be understood that the interval between the main part of the flexible piezoelectric film unit 300 and the housing 100 can play the role of a back cavity for the flexible piezoelectric film unit 300, so that the flexible piezoelectric film unit 300 can push more air to vibrate when vibrating, so as to give full play to the acoustic performance of the flexible piezoelectric film unit 300, so that the mid- and low-frequency response of the flexible piezoelectric film unit 300 is better.

[0059] In a specific embodiment, Figure 2 As shown, a first support member 410 and a second support member 420 are provided on the outer wall of the shell 100, one end of the flexible piezoelectric film unit 300 is connected to the side of the first support member 410 away from the shell 100, and the other end of the flexible piezoelectric film unit 300 is connected to the side of the second support member 420 away from the shell 100.

[0060] Schematically, when the housing 100 is cylindrical, the first support member 410 and the second support member 420 can be respectively annular structures sleeved on the housing 100, the first support member 410 and the second support member 420 are spaced apart in the axial direction of the housing 100, and the first support member 410 and the second support member 420 are respectively located outside the second cavity 120. Optionally, the top end of the flexible piezoelectric film unit 300 can be attached to the outer side of the second support member 420, and the bottom end of the flexible piezoelectric film unit 300 can be attached to the outer side of the first support member 410.

[0061] In this structure, the flexible piezoelectric film unit 300 is supported by the first support member 410 and the second support member 420 respectively, so that there is a gap between the main part of the flexible piezoelectric film unit 300 and the housing 100 to give full play to the acoustic performance of the flexible piezoelectric film unit 300.

[0062] In a possible implementation, the flexible piezoelectric film unit 300 includes a flexible piezoelectric film 310 , and the flexible piezoelectric film 310 is disposed around the outer side of the second cavity 120 .

[0063] It can be understood that when alternating current is passed through the flexible piezoelectric film 310, the flexible piezoelectric film 310 vibrates as a whole, and can output 360° omnidirectional high-frequency sound, thereby ensuring the coverage of the high-frequency sound.

[0064] In addition, the above arrangement can simplify the power supply circuit of the sound box, and only one circuit is needed to power the speaker 200 and one circuit is needed to power the flexible piezoelectric film 310 .

[0065] In another possible implementation, Figure 6 As shown, the flexible piezoelectric film unit 300 includes a plurality of flexible piezoelectric films 310 , which are sequentially arranged around the center of the housing 100 , and each flexible piezoelectric film 310 is configured to output high-frequency sound.

[0066] Schematically, the speaker is a flexible piezoelectric film unit 300 through multiple lines, and each flexible piezoelectric film 310 is connected to one line. By controlling the power supply of each flexible piezoelectric film 310, it is possible to control whether each flexible piezoelectric film 310 outputs high-frequency sound. It is worth mentioning that Figure 6 The number of the flexible piezoelectric films 310 shown is for illustration only. The present embodiment does not limit the specific number of the flexible piezoelectric films 310, and those skilled in the art may set the number as required.

[0067] With this structure, the output of high-frequency sound of the speaker is more flexible. For example, alternating current can be supplied to the flexible piezoelectric film 310 at a specific position according to the position of the user, ensuring that the user can hear the complete high-frequency part of the music.

[0068] Optionally, the distances between each flexible piezoelectric film 310 and the center of the housing 100 are equal.

[0069] For example, when the housing 100 is cylindrical, the plurality of flexible piezoelectric films 310 may be arranged in a circular array around the axis of the cylinder. Each flexible piezoelectric film 310 may be formed into an arc shape, and the distance between each position of the arc and the axis of the housing 100 is equal.

[0070] Through the above configuration, when all the flexible piezoelectric films 310 output high-frequency sounds, the sound pressure level distribution around the speaker can be made more uniform. In addition, the distance between each flexible piezoelectric film 310 and the housing 100 is the same, so that the acoustic performance of each flexible piezoelectric film 310 is more consistent. When multiple flexible piezoelectric films 310 output high-frequency sounds, the frequency response curves of multiple flexible piezoelectric films 310 are consistent, ensuring the overall sound quality.

[0071] In one embodiment, each flexible piezoelectric film 310 is also configured to output an ultrasonic frequency band. The speaker also includes a microphone array and a central control unit. The microphone array includes a plurality of microphones, and the plurality of microphones are arranged on the housing 100 in a ring around the center of the housing 100. Each flexible piezoelectric film 310 corresponds to at least one microphone. Each flexible piezoelectric film 310 and each microphone are electrically connected to the central control unit.

[0072] Schematically, each flexible piezoelectric film 310 can reach the ultrasonic frequency band after passing alternating current, such as Figure 4 As shown, the ultrasonic frequency band output by the flexible piezoelectric film unit 300 can reach above 40KHz. Since multiple flexible piezoelectric films 310 are arranged in sequence around the center of the housing 100, the flexible piezoelectric film unit 300 can emit 360° omnidirectional ultrasonic waves, thereby realizing omnidirectional ultrasonic detection.

[0073] Optionally, the microphone array can be located in the accommodating cavity below the flexible piezoelectric film unit 300, and the housing 100 can be provided with sound receiving holes at positions corresponding to the microphones. Each flexible piezoelectric film 310 corresponds to at least one microphone, which can ensure that the ultrasonic signal emitted by each flexible piezoelectric film 310, contacting an object and reflected back can be captured by the corresponding microphone.

[0074] During the detection process, the central control unit can control each flexible piezoelectric film 310 to emit ultrasonic waves at the same time, and each microphone captures the ultrasonic signal emitted by the corresponding flexible piezoelectric film 310 and then contacts the object and reflects back, and transmits the data to the central control unit. The central control unit receives the data from each microphone, and accurately calculates the user's position through time difference estimation (TDOA) and triangulation algorithms to realize the ultrasonic detection function.

[0075] In the related art, conventional speakers with ultrasonic detection functions achieve this function by leveraging the strong directivity of the ultrasonic frequency band of the tweeter. In this case, the area that can be covered by ultrasonic detection is relatively small, and only the area directly facing the ultrasonic tweeter that can emit a sufficient sound pressure level is covered.

[0076] The speaker provided in this embodiment can achieve omnidirectional ultrasonic detection by means of multiple flexible piezoelectric films 310 placed in a surrounding manner. The flexible piezoelectric film 310 at the position of the user can detect the position of the person. The speaker does not need to be provided with multiple tweeter dynamic units to achieve omnidirectional ultrasonic detection, which is beneficial to reducing the volume of the speaker. The audio output by the speaker is more flexible. For example, after obtaining the position of the user, the central control unit can control each flexible piezoelectric film 310. For example, the flexible piezoelectric film 310 at a specific position can be controlled to output high-frequency sound, and other flexible piezoelectric films 310 can be controlled to stop outputting high-frequency sound.

[0077] In other embodiments, the flexible piezoelectric film unit 300 may include only one flexible piezoelectric film 310 disposed around the housing, the speaker is provided with a microphone array and a central control unit, and each microphone of the microphone array and the flexible piezoelectric film 310 are electrically connected to the central control unit respectively. The speaker can also realize omnidirectional ultrasonic detection by emitting 360° omnidirectional ultrasonic waves through the flexible piezoelectric film 310.

[0078] In a specific implementation, each flexible piezoelectric film 310 corresponds to a plurality of microphones.

[0079] Exemplarily, a plurality of microphones are respectively arranged under each flexible piezoelectric film 310. The central control unit receives data from each microphone, and can more accurately calculate the user's position through time difference estimation (TDOA) and triangulation algorithm. In addition, each flexible piezoelectric film 310 corresponds to a plurality of microphones, and the central control unit can more accurately determine the flexible piezoelectric film 310 at the user's location, and then more accurately control each flexible piezoelectric film 310.

[0080] The present application also provides an electronic device, comprising an electronic device body and the above-mentioned speaker, wherein the speaker is installed on the electronic device body.

[0081] The electronic device provided by the present application, by adopting the above-mentioned speaker, can output high-frequency band sound through the flexible piezoelectric film unit 300 wound around the outer side of the housing 100 of the speaker, and the high-frequency sound output by the electronic device has a large coverage range. At the same time, the speaker does not need to be provided with multiple high-frequency dynamic units to increase the coverage range of the high-frequency sound, which is convenient for saving the volume of the speaker, and further helps to reduce the volume of the electronic device.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sound box, characterized in that: include: A housing (100), wherein the housing (100) has a receiving cavity; A loudspeaker (200) is installed in the accommodating cavity, the loudspeaker (200) divides the accommodating cavity into a first cavity (110) and a second cavity (120), and the loudspeaker (200) is configured to output mid- and low-frequency sounds; A flexible piezoelectric film unit (300) is arranged around the outer side of the housing (100), and the flexible piezoelectric film unit (300) is configured to output high-frequency sound.

2. The speaker according to claim 1, characterized in that: A sound outlet hole (130) is arranged on the side wall of the first cavity (110), and the flexible piezoelectric film unit (300) is arranged around the outside of the second cavity (120).

3. The speaker according to claim 2, characterized in that: There is a gap between the main body of the flexible piezoelectric film unit (300) and the housing (100).

4. The speaker according to claim 3, characterized in that: A first support member (410) and a second support member (420) are provided on the outer wall of the shell (100); one end of the flexible piezoelectric film unit (300) is connected to a side of the first support member (410) facing away from the shell (100); and the other end of the flexible piezoelectric film unit (300) is connected to a side of the second support member (420) facing away from the shell (100).

5. The speaker according to claim 2, characterized in that: The flexible piezoelectric film unit (300) comprises a flexible piezoelectric film (310), and the flexible piezoelectric film (310) is arranged around the outside of the second cavity (120).

6. The speaker according to claim 2, characterized in that: The flexible piezoelectric film unit (300) comprises a plurality of flexible piezoelectric films (310), the plurality of flexible piezoelectric films (310) being arranged in sequence around the center of the housing (100), and each of the flexible piezoelectric films (310) being configured to output high-frequency band sound.

7. The speaker according to claim 6, characterized in that: The distances between each of the flexible piezoelectric films (310) and the center of the housing (100) are equal.

8. The speaker according to claim 6, characterized in that: Each of the flexible piezoelectric films (310) is also configured to output an ultrasonic frequency band; The speaker box further comprises a microphone array and a central control unit. The microphone array comprises a plurality of microphones. The plurality of microphones are arranged on the shell (100) in a ring shape around the center of the shell (100). Each of the flexible piezoelectric films (310) corresponds to at least one of the microphones. Each of the flexible piezoelectric films (310) and each of the microphones are electrically connected to the central control unit.

9. The speaker according to claim 8, characterized in that: Each of the flexible piezoelectric films (310) corresponds to a plurality of the microphones respectively.

10. An electronic device, characterized in that: The invention comprises an electronic device body and a sound box according to any one of claims 1 to 9, wherein the sound box is installed on the electronic device body.

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