Speaker and electronic device

Abstract

The application discloses a loudspeaker and an electronic device. The loudspeaker comprises a shell and a sound production assembly. The shell forms a cavity, and the sound production assembly is arranged in the cavity and used for vibrating to produce sound. The shell is provided with a groove. The groove has opposite first and second side walls. A deformation piece is arranged in the groove. The deformation piece has a first form and a second form. When the sound production assembly is in a vibrating sound production state, the deformation piece is in the first form, and the deformation piece abuts against the first and second side walls. When the sound production assembly is not in the vibrating sound production state, the deformation piece is in the second form, and the deformation piece is separated from at least one of the first and second side walls.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of audio playing devices, in particular to a loudspeaker and an electronic device. BACKGROUND

[0002] The loudspeaker is a commonly used electro-acoustic transducer that converts electrical signals into acoustic signals. The performance of the loudspeaker greatly affects the sound quality, and the shell, which is an important part of the loudspeaker structure, is crucial to the performance of the loudspeaker. Different shell materials bring different sound quality performances, because the stiffness of the materials is different, the resonance performance under the excitation of the sound signal is different, thus causing different harmonic distortions, resulting in different sound quality performances.

[0003] Generally, the loudspeaker with a material with high stiffness performs better, and compared with wood, ceramic and metal, the stiffness of plastic is poor, so the loudspeaker with a plastic shell has poor sound quality. However, since plastic is easy to process and form, the loudspeaker shell in current electronic devices basically adopts plastic materials, which causes the current loudspeaker to be prone to harmonic distortion due to resonance, and the sound quality is poor. SUMMARY

[0004] The present application aims to provide a loudspeaker, an electronic device and a method for adjusting the resonance frequency, at least solving the problem that the current loudspeaker is prone to harmonic distortion due to resonance, and the sound quality is poor.

[0005] In order to solve the above technical problems, the present application is implemented as follows:

[0006] In a first aspect, the embodiments of the present application provide a loudspeaker, comprising:

[0007] a shell and a sound generating component, the shell forms a cavity, the sound generating component is arranged in the cavity, and the sound generating component is used for vibrating and generating sound;

[0008] wherein the shell is provided with a groove, the groove has opposite first and second side walls, a deformation member is arranged in the groove, and the deformation member has a first shape and a second shape.

[0009] When the sound generating component is in a vibrating and sound generating state, the deformation member is in the first shape, and the deformation member abuts against the first and second side walls; when the sound generating component is not in the vibrating and sound generating state, the deformation member is in the second shape, and the deformation member is separated from at least one of the first and second side walls.

[0010] In a second aspect, the embodiments of the present application further provide an electronic device, comprising the above loudspeaker.

[0011] In the embodiments of the present application, the sound generating assembly is arranged in the shell, and the deformation piece with the first form and the second form is arranged in the groove on the shell. When the deformation piece is in the first form, the deformation piece is pressed between the side walls of the groove, and the stiffness of the shell is improved in combination with the stress stiffening effect of the shell material, thereby the resonance frequency of the loudspeaker can be increased. When the deformation piece is in the second form, the deformation piece is separated from the side wall of at least one side of the groove, the stiffness of the shell is restored, and the resonance frequency of the loudspeaker is restored to the initial state. By adjusting the resonance frequency of the loudspeaker, not only the harmonic distortion problem caused by resonance can be solved, but also the influence of the resonance of the shell on the sound quality can be avoided, the sound quality performance of the loudspeaker is improved, and the user experience is improved.

[0012] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0013] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0014] Figure 1 is a schematic view of a loudspeaker provided by an embodiment of the present application;

[0015] Figure 2 is a schematic view of a dielectric elastomer in a first form provided by an embodiment of the present application;

[0016] Figure 3 is a schematic view of a dielectric elastomer in a second form provided by an embodiment of the present application;

[0017] Figure 4 is one of the schematic views of a shell provided by an embodiment of the present application;

[0018] Figure 5 is another of the schematic views of a shell provided by an embodiment of the present application;

[0019] Figure 6 is a third of the schematic views of a shell provided by an embodiment of the present application;

[0020] Figure 7 is a fourth of the schematic views of a shell provided by an embodiment of the present application;

[0021] Figure 8 is a fifth of the schematic views of a shell provided by an embodiment of the present application;

[0022] REFERENCE SIGNS:

[0023] 10, housing; 100, groove; 101, first groove; 1011, first slot; 1012, second slot; 102, second groove; 1021, third slot; 1022, fourth slot; 103, third groove; 104, fourth groove; 110, blind groove; 111, first blind groove; 112, second blind groove; 120, sound outlet; 20, sound production assembly; 30, deformation piece. DETAILED DESCRIPTION

[0024] The embodiments of the present application will be described in detail below with reference to the drawings, in which the same or similar components have the same or similar reference numbers throughout the drawings and a repeated explanation is omitted. The embodiments described below are examples for explaining the present application and are not intended to limit the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0025] The terms "first", "second" in the specification and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified and limited.

[0026] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] The embodiments of the present application will be described below in conjunction with Figures 1 to 3 The loudspeaker according to the embodiments of the present application can be one of an electric type (i.e. moving coil type), an electrostatic type (i.e. capacitor type), an electromagnetic type (i.e. reed type), and a piezoelectric type (i.e. crystal type).

[0028] As shown in FIG. 1, the loudspeaker according to the embodiments of the present application includes a housing 10 and a sound production assembly 20. Figure 1 The housing 10 is a shell of the entire loudspeaker, and the housing 10 is a hollow structure, and a cavity is formed in the housing 10. The sound production assembly 20 is a main sound production component in the loudspeaker, and the sound production assembly 20 is arranged in the cavity, and the sound production assembly 20 is used to vibrate in the cavity to make the air change in density and produce sound when the loudspeaker works.

[0029] Generally, the speaker's shell 10 has poor rigidity, and will resonate under the excitation of an audio signal (20-20KHz). The resonance of the shell 10 will superimpose on the original internal air flow of the speaker as an air excitation source, causing disturbance and harmonic distortion.

[0030] To solve the above problems, the shell 10 is provided with a groove 100 in the embodiment, and the groove 100 has a surface recess shape. The groove 100 is provided with a deformation member 30, and the deformation member 30 has a first mode and a second mode in the groove 100.

[0031] Generally, the groove 100 has opposite first and second side walls. When the sound generating assembly 20 is in a vibrating sound generating state, the deformation member 30 is in the first mode and abuts against the first and second side walls. At this time, the shell 10 is extruded by the deformation member 30, and the rigidity of the shell 10 is significantly increased under the stress of the deformation member 30, thereby increasing the resonance frequency of the speaker. When the sound generating assembly 20 is not in the vibrating sound generating state, the deformation member 30 is in the second mode and separated from at least one of the first and second side walls. Thus, the rigidity of the shell 10 is restored, and the resonance frequency of the speaker returns to the initial state.

[0032] When the groove 100 is a circular groove or an irregular shape, when the sound generating assembly 20 is in a vibrating sound generating state, the deformation member 30 is in the first mode and abuts against both sides of the groove 100 in a straight line direction. At this time, the shell 10 is extruded by the deformation member 30, and the rigidity of the shell 10 is significantly increased under the stress of the deformation member 30, thereby increasing the resonance frequency of the speaker.

[0033] When the sound generating assembly 20 is not in the vibrating sound generating state, the deformation member 30 is in the second mode and separated from at least one side of the groove 100 in a straight line direction. Thus, the rigidity of the shell 10 is restored, and the resonance frequency of the speaker returns to the initial state.

[0034] In the embodiment of the present application, by providing the sound generating assembly 20 in the shell 10 and the deformation member 30 with the first and second modes in the groove 100 on the shell 10, the deformation member 30 extrudes between the side walls of the groove 100 when the deformation member 30 is in the first mode, the rigidity of the shell 10 is improved by the stress stiffening effect of the shell material, thereby increasing the resonance frequency of the speaker. When the deformation member 30 is in the second mode, the deformation member 30 is separated from the side wall of at least one side of the groove 100, the rigidity of the shell 10 is restored, and the resonance frequency of the speaker returns to the initial state. By adjusting the resonance frequency of the speaker, not only the harmonic distortion problem caused by resonance can be solved, but also the influence of the resonance of the shell 10 on the sound quality can be avoided, the sound quality performance of the speaker is improved, and the user experience is improved.

[0035] It should be noted that the housing 10 of the loudspeaker is generally provided with a sound outlet 120, and the groove 100 is generally arranged on one side of the housing 10 having the sound outlet 120 or the side adjacent thereto, so as to avoid the influence of the resonance of the housing 10 on the sound quality.

[0036] In one embodiment, as shown in Figure 1 the groove 100 is a through groove extending from one side of the housing 10 to the other side opposite thereto, and the deformation member 30 extends in the through groove from one side of the housing 10 to the other side opposite thereto, and the two ends of the deformation member 30 are flush with the groove opening of the through groove.

[0037] Specifically, the through groove is arranged on the top surface of the housing 10, and the through groove extends from the front side of the housing 10 to the back side thereof, and the through groove extends along the X-axis direction. Since the deformation member 30 is arranged in the through groove, the deformation member 30 is also arranged on the top surface of the housing 10, and the deformation member 30 also extends along the X-axis direction.

[0038] After the deformation member 30 is adjusted to the first shape, the deformation member 30 can expand along the Y-axis direction, and the rigidity of the upper housing 10 along the Y-axis direction increases after being pressed, thereby increasing the resonance frequency of the upper housing 10, so as to increase the resonance frequency of the loudspeaker.

[0039] In an alternative embodiment, as shown in Figure 1 the housing 10 is a plastic housing or a plastic shell, for example, the housing 10 can be made of synthetic resin, which is a high molecular compound produced by polymerization reaction of low molecular raw material monomers (such as ethylene, propylene, vinyl chloride, etc.) into macromolecules, and has the characteristics of light weight and good toughness.

[0040] In one embodiment, as shown in Figures 1 to 3 opposite sides of the deformation member 30 are provided with electrodes, and the deformation member 30 can change from the first shape to the second shape when the electrodes are energized. As shown in Figure 2 under the control of an external electric field, the deformation member 30 expands from the second shape to the first shape. As shown in Figure 3 without applying voltage, the deformation member 30 returns to the second shape.

[0041] The deformation member 30 is a kind of smart material, and its composition is an electroactive polymer made of piezoelectric material or dielectric elastomer. Under the induction of an external electric field, it can change shape or volume, and when no electric field is applied, it can return to the original shape or volume, and has special mechanical and electrical properties.

[0042] As shown in Figure 2As shown, when the deformation member 30 is affected by the voltage and is in the first shape, the deformation member 30 is pressed between the side walls of the groove 100. The shell 10 is pressed by the deformation member 30, and the rigidity of the shell 10 is significantly increased under the stress of the deformation member 30, thereby increasing the resonance frequency of the loudspeaker.

[0043] When the deformation member 30 is not affected by the voltage and is in the second shape, the deformation member 30 returns to the original shape or volume, and the deformation member 30 is separated from the side wall of at least one side of the groove 100, so that the rigidity of the shell 10 returns, and the resonance frequency of the loudspeaker returns to the initial state.

[0044] Based on the above embodiment, in one embodiment, the loudspeaker further comprises a vibration detection element. The vibration detection element is used to detect the vibration condition of the shell 10, and the loudspeaker adjusts the output voltage of the electrode according to the detected vibration condition of the shell 10.

[0045] Specifically, the electrode is divided into a first electrode and a second electrode. The first electrode and the second electrode are respectively connected to the two sides of the deformation member 30; the vibration detection element is arranged on one side of the shell 10, and the vibration detection element is electrically connected with the first electrode and / or the second electrode. The vibration detection element is used to adjust the voltage output by the first electrode and / or the second electrode according to the detected vibration condition of the shell 10.

[0046] The vibration detection element can adopt a piezoelectric film, which is attached to the outer surface of the shell 10 of the loudspeaker. When the shell 10 is excited by a sound signal to produce vibration, the vibration will act on the piezoelectric film to generate a voltage output. The more intense the vibration of the shell 10, the stronger the electric signal output by the piezoelectric film. When the shell 10 resonates, the voltage output of the piezoelectric film will reach the maximum. By using passive active detection, the vibration information of the shell of the loudspeaker is detected by using piezoelectric material, and then the voltage applied to the deformation member 30 is adjusted to control the rigidity of the shell 10, so that the influence of the resonance of the shell 10 on the sound quality can be avoided.

[0047] In order to further increase the resonance frequency of the loudspeaker, as shown in the figure, Figure 4 The first side and the second side of the shell 10 are respectively provided with a first groove 101 and a second groove 102, that is, the first side of the shell 10 is provided with the first groove 101, and the second side of the shell 10 is provided with the second groove 102. The first groove 101 and the second groove 102 are both strip-shaped grooves. The first groove 101 extends along the first direction (X-axis direction) on the first side of the shell 10, and the second groove 102 extends along the first direction on the second side of the shell 10. The deformation member 30 is arranged in the first groove 101 and the second groove 102, that is, the deformation member 30 is arranged in both the first groove 101 and the second groove 102.

[0048] When the deformable element 30 is affected by voltage and is in the first state, the deformable element 30 in the first groove 101 expands along the second direction (Y-axis direction) perpendicular to the first direction, thereby increasing the stiffness of the upper shell 10 along the Y-axis direction after being compressed, which in turn increases the resonant frequency of the upper shell 10. The deformable element 30 in the second groove 102 expands along the third direction (Z-axis direction) perpendicular to the first and second directions, thereby increasing the stiffness of the right shell 10 along the Z-axis direction after being compressed, which in turn increases the resonant frequency of the right shell 10. In this embodiment, by providing deformable elements 30 on both sides of the shell 10, the resonant frequency of the speaker is further increased.

[0049] When the deformable element 30 is not affected by voltage and is in the second state, the deformable element 30 in the first groove 101 and the second groove 102 returns to its initial shape, the rigidity of the housing 10 is restored, and the resonant frequency of the speaker returns to its initial state.

[0050] Correspondingly, if the resonant frequency of the loudspeaker is still relatively high, such as Figure 5 As shown, through slots can be further provided on the top, bottom, left and right sides of the housing 10. A first groove 101 is provided on the upper side of the housing 10, a second groove 102 is provided on the right side of the housing 10, a third groove 103 is provided on the lower side of the housing 10, and a fourth groove 104 is provided on the left side of the housing 10. When it is necessary to adjust the resonant frequency of the housing 10 on any side, pressure can be applied to the corresponding deformable part 30 to adjust the resonant frequency of the housing 10 at different positions.

[0051] Furthermore, depending on the shape of the housing 10, deformable elements 30 can be provided at different positions on the housing 10 to meet different user needs. For example, when the housing 10 is a cuboid structure, one or more through slots can be provided on the upper, lower, left, right, front, and rear sides of the housing 10 to meet different resonance requirements.

[0052] In one embodiment, such as Figure 6 As shown, the first groove 101 includes a first groove portion 1011 and a second groove portion 1012. The first groove portion 1011 extends along a first direction on a first side of the housing 10, that is, the first groove portion 1011 extends along the X-axis direction on the upper side of the housing 10. The second groove portion 1012 extends along a second direction perpendicular to the first direction on the first side of the housing 10, that is, the second groove portion 1012 extends along the Y-axis direction on the upper side of the housing 10. A deformation member 30 is disposed in the first groove portion 1011 and the second groove portion 1012, that is, a deformation member 30 is provided in both the first groove portion 1011 and the second groove portion 1012.

[0053] When the deformation member 30 is affected by the voltage, in the first configuration, the deformation member 30 in the first groove portion 1011 expands along the second direction, and the deformation member 30 in the second groove portion 1012 expands along the first direction, so that the stiffness of the upper side shell along the X-axis direction and the Y-axis direction is increased, and the resonance frequency of the upper side shell 10 is greatly increased.

[0054] When the deformation member 30 is not affected by the voltage, in the second configuration, the deformation member 30 in the first groove portion 1011 and the second groove portion 1012 returns to the initial shape, the stiffness of the shell 10 is restored, and the resonance frequency of the loudspeaker returns to the initial state.

[0055] Further, the second groove 102 includes a third groove portion 1021 and a fourth groove portion 1022. The third groove portion 1021 extends along the first direction on the second side of the shell 10 adjacent to the first side, and the fourth groove portion 1022 extends along a third direction perpendicular to the first direction and the second direction on the second side of the shell 10, that is, the third groove portion 1021 extends along the X-axis direction on the right side of the shell 10, and the fourth groove portion 1022 extends along the Z-axis direction on the right side of the shell 10. The deformation member 30 is arranged in the third groove portion 1021 and the fourth groove portion 1022, that is, the deformation member 30 is arranged in both the third groove portion 1021 and the fourth groove portion 1022.

[0056] When the deformation member 30 is affected by the voltage, in the first configuration, the deformation member 30 in the third groove portion 1021 expands along the third direction, and the deformation member 30 in the fourth groove portion 1022 expands along the first direction, so that the stiffness of the right side shell along the X-axis direction and the Z-axis direction is increased, and the resonance frequency of the right side shell 10 is greatly increased.

[0057] When the deformation member 30 is not affected by the voltage, in the second configuration, the deformation member 30 in the third groove portion 1021 and the fourth groove portion 1022 returns to the initial shape, the stiffness of the shell 10 is restored, and the resonance frequency of the loudspeaker returns to the initial state.

[0058] In another embodiment, as shown in FIG. 10, the groove is a blind groove 110, and the deformation member 30 is arranged in the blind groove 110. Figure 7

[0059] When the deformation member 30 is affected by the voltage, in the first configuration, the deformation member 30 is pressed between the side walls arranged around the blind groove 110. Thus, the stiffness of the upper side shell 10 along the X-axis direction and the Y-axis direction is increased, and the resonance frequency of the upper side shell 10 is greatly increased.

[0060] When the deformation member 30 is not affected by the voltage, in the second configuration, the deformation member 30 returns to the initial shape, the stiffness of the upper side shell 10 is restored, and the resonance frequency of the loudspeaker returns to the initial state.​

[0061] In the embodiment, the first shape of the deformation member 30 includes a first expanded shape and a second expanded shape. When the deformation member 30 is subjected to a voltage in a first direction and is in the first expanded shape, the deformation member 30 expands along the first direction, and the deformation member 30 is pressed between the side walls of the blind groove 110 arranged opposite to each other along the first direction, so that the rigidity of the shell 10 along the Y-axis direction is increased.

[0062] When the deformation member 30 is subjected to a voltage in another direction and is in the second expanded shape, the deformation member 30 expands along a second direction perpendicular to the first direction, and the deformation member 30 is pressed between the side walls of the blind groove 110 arranged opposite to each other along the second direction, so that the rigidity of the shell 10 along the X-axis direction is increased.

[0063] In one embodiment, as shown in FIG. 1, the first side and the second side of the shell 10 are respectively provided with a first blind groove 111 and a second blind groove 112. Figure 8

[0064] The first blind groove 111 is arranged on the first side of the shell 10, and the first blind groove 111 can extend along the first direction (X-axis direction) or along the second direction (Y-axis direction) perpendicular to the first direction, or simultaneously along the first direction and the second direction; the second blind groove 112 is arranged on the second side of the shell 10, and the second blind groove 112 can extend along the first direction or along the third direction (Z-axis direction) perpendicular to the first direction and the second direction, or simultaneously along the first direction and the third direction.

[0065] When the deformation member 30 is subjected to a voltage and is in the first shape, the deformation member 30 is pressed between the side walls arranged around the blind groove 110. Thus, the rigidity of the upper shell 10 along the X-axis direction and the Y-axis direction is increased, and the resonant frequency of the upper shell 10 is greatly increased. The rigidity of the right shell 10 along the X-axis direction and the Y-axis direction is increased, and the resonant frequency of the right shell 10 is greatly increased.

[0066] When the deformation member 30 is not subjected to a voltage and is in the second shape, the deformation member 30 returns to the initial shape, the rigidity of the upper shell 10 and the right shell 10 returns, and the resonant frequency of the speaker returns to the initial state.

[0067] The electronic device can be a smartphone, a game console, a tablet computer, an e-book reader, or a wearable device. Of course, the electronic device can also be other devices, and the embodiments of the present application do not limit this.

[0068] ​Taking a smart phone as an example, the electronic device comprises the loudspeaker, a sound emitting component is arranged in the shell, and a deformation piece having a first mode and a second mode is arranged in the groove on the shell, so that in the case where the deformation piece is in the first mode, the deformation piece is pressed between the side walls of the groove, the rigidity of the shell is improved in combination with the stress stiffening effect of the shell material, and then the resonance frequency of the loudspeaker can be increased. In the case where the deformation piece is in the second mode, the deformation piece is separated from the side wall of at least one side of the groove, the rigidity of the shell is restored, and the resonance frequency of the loudspeaker is restored to the initial state. By adjusting the resonance frequency of the loudspeaker, not only the harmonic distortion problem caused by resonance can be solved, but also the influence of the resonance of the shell on the sound quality can be avoided, the sound quality performance of the loudspeaker is improved, and the user experience is improved.

[0069] In one specific embodiment, the audio in the audio to be played is obtained first, and the frequency of the audio is divided into three sections of high (A), medium (B) and low (C).

[0070] When the loudspeaker starts to work, the processor judges the frequency range of the played audio high FA / medium FB / low FC. If the high frequency FA accounts for more than 50%, it is judged as high frequency. If the medium frequency FB accounts for more than 50%, it is judged as medium frequency. If the low frequency FC accounts for more than 50%, it is judged as low frequency.

[0071] Based on the frequency proportion, the voltage at both ends of the dielectric elastomer is adjusted. For sound signal excitation of high, medium and low frequencies, the resonance performance of the shell is different. The corresponding voltages required to be applied on the dielectric elastomer to avoid shell resonance are VA, VB and VC, respectively. VA corresponds to high (A), VB corresponds to medium (B), and VC corresponds to low (C). The specific values of VA, VB and VC can be calibrated by testing.

[0072] According to different frequency ranges, corresponding VA / VB / VC voltages are applied to make the dielectric elastomer swell and press the shell surface to improve the rigidity of the shell, so that the shell resonance frequency is offset from the excitation frequency of the played audio signal, and the shell resonance is avoided as an air excitation source to superimpose harmonic distortion on the original air flow generated inside the loudspeaker.

[0073] In another specific embodiment, a piezoelectric film can be attached to the outer surface of the shell of the loudspeaker. When the shell is excited by a sound signal to vibrate, it will act on the piezoelectric film to generate a voltage output. The more intense the shell vibration, the stronger the piezoelectric film output. When the shell resonates, the piezoelectric film voltage output will reach the maximum, so that the vibration of the shell can be obtained through the piezoelectric film.

[0074] After the vibration condition is acquired, the piezoelectric film output voltage signal Vx is taken as a control signal of the dielectric elastomer adjusting voltage Vt, the piezoelectric film output voltage signal Vx is judged after the dielectric elastomer voltage adjustment is started, the size of the dielectric elastomer adjusting voltage Vt is changed, so that Vx gradually becomes smaller, when Vx changes to the minimum value Vx_min, the dielectric elastomer adjusting voltage Vt_fix is locked, at this time, the stiffness of the speaker shell can better simulate the resonance generated by the corresponding sound excitation signal, so as to avoid the shell resonance to be superimposed on the original speaker internal air flow as an air excitation source to produce harmonic distortion.

[0075] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0076] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A loudspeaker, characterized in that, The device includes a housing and a sound-generating component, wherein the housing forms a cavity, the sound-generating component is disposed within the cavity, and the sound-generating component is used to vibrate and generate sound; The shell is provided with a groove, the groove has a first sidewall and a second sidewall, and a deformable element is provided in the groove, the deformable element having a first shape and a second shape; When the sound-generating component is in a vibrating sound-generating state, the deformation member is in the first form, and the deformation member abuts against the first sidewall and the second sidewall to increase the resonant frequency of the speaker by increasing the rigidity of the housing; when the sound-generating component is not in a vibrating sound-generating state, the deformation member is in the second form, and the deformation member is separated from at least one of the first sidewall and the second sidewall.

2. The loudspeaker according to claim 1, characterized in that, The groove is a through groove, and the two ends of the deformable part are flush with the opening of the through groove.

3. The loudspeaker according to claim 1, characterized in that, The shell is a plastic shell.

4. The loudspeaker according to claim 1, characterized in that, Electrodes are provided on opposite sides of the deformable member. When the electrodes are energized, the deformable member changes from the first form to the second form.

5. The loudspeaker according to claim 4, characterized in that, The deformable component is made of piezoelectric material or dielectric elastic material.

6. The loudspeaker according to any one of claims 1-5, characterized in that, The first and second adjacent sides of the housing are respectively provided with a first groove and a second groove; the first groove and the second groove are both strip-shaped grooves, and the deformation element is provided in both the first groove and the second groove.

7. The loudspeaker according to claim 6, characterized in that, The first groove includes: a first groove portion and a second groove portion; the first groove portion extends along a first direction on a first side of the housing, and the second groove portion extends along a second direction perpendicular to the first direction on the first side of the housing; The second groove includes a third groove and a fourth groove; the third groove extends along the first direction on the second side of the housing adjacent to the first side, and the fourth groove extends along a third direction perpendicular to the first and second directions on the second side of the housing; the deformable element is provided in the first groove, the second groove, the third groove and the fourth groove.

8. The loudspeaker according to any one of claims 1-5, characterized in that, The groove is a blind groove. When the deformable part is in the first state, the deformable part is squeezed between the side walls around the blind groove.

9. The loudspeaker according to claim 8, characterized in that, The first and second adjacent sides of the housing are respectively provided with a first blind groove and a second blind groove; The first blind groove is disposed on the first side of the housing, and the second blind groove is disposed on the second side of the housing. The deformable element is provided in both the first blind groove and the second blind groove.

10. The loudspeaker according to claim 4, characterized in that, The speaker also includes a vibration detection element for detecting the vibration of the housing; The speaker adjusts the output voltage of the electrodes based on the detected vibration of the housing.

11. An electronic device, characterized in that, include: The loudspeaker as described in any one of claims 1-10.

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