Sound box and electronic equipment

Abstract

The invention provides a sound box and electronic equipment. The sound box comprises a box body, the box body comprises a box wall and a protruding part, a sound cavity is defined by the box wall, the protruding part is connected to the side, facing the sound cavity, of the box wall, the protruding part is arranged inwards in a protruding mode from the side, facing the sound cavity, of the box wall, and the protruding part is arranged in a protruding mode in the first direction; the first passive radiator is fixed on the box wall, and the first passive radiator vibrates along a second direction; wherein the first direction intersects with the second direction. The sound box aims at solving the problems of the existing sound box in the aspects of sound quality, structural strength, stability and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electro-acoustic devices, and in particular to a sound box and an electronic device. BACKGROUND

[0002] With the acceleration of the consumer electronics industry towards thinness and multi-functionality, portable electronic devices represented by smart TVs, ultrabooks and tablet computers continue to break through the physical size limit.

[0003] Such electronic devices usually need to be equipped with a sound box to achieve sound output function. However, the internal structure of the electronic device is compact, and the installation space of the sound box is limited. Based on this, the current mainstream solution adopts a narrow and long cavity design to adapt to the thickness limit of the device, but this design also brings a series of problems. The narrow and long sound box has the defect of insufficient shell strength, especially in the peripheral area of the passive diaphragm, the structural strength is obviously weak. In this case, the sound box is easy to appear resonance mode, and then cause the coupling vibration of the shell and the passive diaphragm, which not only causes noise problem, but also may cause the instability of the overall structure of the sound box, seriously affecting the performance and use experience. SUMMARY

[0004] The embodiments of the present application provide a sound box and an electronic device, aiming at solving the problems of the existing sound box in sound quality, structural strength and stability.

[0005] The embodiments of the present application provide a sound box, comprising:

[0006] a box body, the box body comprising a box wall and a protruding part, the box wall surrounding to form an acoustic cavity, the protruding part being connected to one side of the box wall facing the acoustic cavity, the protruding part being protruded inward from one side of the box wall facing the acoustic cavity, the protruding part being protruded along a first direction;

[0007] a first passive radiator, the first passive radiator being fixed on the box wall, the first passive radiator vibrating along a second direction;

[0008] wherein the first direction intersects the second direction.

[0009] In some embodiments, in the vibration direction of the first passive radiator, the cross-sectional area of the protruding part gradually increases.

[0010] In some embodiments, one side of the protruding part facing the acoustic cavity is a slope, the slope being inclined towards the inside of the acoustic cavity.

[0011] In some embodiments, the sound box further comprises a second passive radiator, the second passive radiator being fixed on the box wall, the second passive radiator being arranged opposite to the first passive radiator.

[0012] In some embodiments, the enclosure wall includes a first sub-wall, a second sub-wall, a third sub-wall, and a fourth sub-wall connected in sequence, with the first sub-wall and the third sub-wall disposed opposite to each other, and the second sub-wall and the fourth sub-wall disposed opposite to each other; the protrusion is disposed on the first sub-wall; the first passive radiator is disposed on the second sub-wall, and the second passive radiator is disposed on the fourth sub-wall, so as to be located on both sides of the protrusion respectively.

[0013] In some embodiments, the second sub-wall is provided with an installation opening, the first sub-wall and the third sub-wall are partially exposed in the installation opening, and the first passive radiator is embedded in the installation opening; the first passive radiator includes a first diaphragm and a first folded edge surrounding the first diaphragm, the first folded edge overlapping the first sub-wall and the third sub-wall.

[0014] In some embodiments, in a direction perpendicular to the first direction, the inner surface of the first sub-protrusion is inclined toward the interior of the acoustic cavity; the inner surface of the second sub-protrusion is inclined toward a direction away from the interior of the acoustic cavity.

[0015] In some embodiments, the protrusion further includes a third sub-protrusion disposed between the first sub-protrusion and the second sub-protrusion, wherein the inclination angle of the inner surface of the third sub-protrusion relative to the first direction is smaller than the inclination angle of the inner surface of the first sub-protrusion; or, the inclination angle of the inner surface of the third sub-protrusion relative to the first direction is smaller than the inclination angle of the inner surface of the second sub-protrusion.

[0016] In some embodiments, the protrusion extends along the first direction until it connects with the box wall to form a connecting layer; the first passive radiator and the second passive radiator are respectively disposed on both sides of the connecting layer.

[0017] In some embodiments, the speaker enclosure further includes a loudspeaker fixed to the enclosure, and the sound waves emitted by the loudspeaker drive the first passive radiator to vibrate through the acoustic cavity.

[0018] In some embodiments, the acoustic cavity includes a first rear cavity, a second rear cavity, and a conduit, the conduit connecting the first rear cavity and the second rear cavity, the first passive radiator corresponding to the first rear cavity, and the loudspeaker corresponding to the second rear cavity.

[0019] This application also provides an electronic device, including:

[0020] case;

[0021] A speaker, wherein the speaker is disposed within the housing, and the speaker is the aforementioned speaker.

[0022] In the speaker and electronic device provided in this application embodiment, the protrusion can play a good local reinforcement role on the cabinet wall of the area surrounding the first passive radiator, significantly improving the structural rigidity and strength of the part, thereby suppressing the harmful deformation and resonance mode of the cabinet wall caused by sound pressure vibration, reducing the resulting abnormal noise and sound quality degradation problems, and improving the overall acoustic performance and reliability of the speaker. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the first structure of a speaker provided in an embodiment of this application.

[0025] Figure 2 This is a first-type explosion diagram of a speaker provided in an embodiment of this application.

[0026] Figure 3 This is a first cross-sectional schematic diagram of a speaker provided in an embodiment of this application.

[0027] Figure 4 This is a second explosion diagram of a speaker provided in an embodiment of this application.

[0028] Figure 5 This is a second cross-sectional schematic diagram of the speaker provided in an embodiment of this application.

[0029] Figure 6 This is a schematic diagram of a second structure of a speaker provided in an embodiment of this application.

[0030] Figure 7 This is a third cross-sectional schematic diagram of the speaker provided in an embodiment of this application.

[0031] Figure 8 This is a fourth cross-sectional schematic diagram of the speaker provided in an embodiment of this application.

[0032] Figure 9 This is a fifth cross-sectional schematic diagram of the speaker provided in an embodiment of this application. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0034] This application provides a speaker and an electronic device, aiming to solve the problems existing in current speakers in terms of sound quality, structural strength, and stability. The following is a detailed description with reference to the accompanying drawings.

[0035] Please see Figure 1 , Figure 1 This is a schematic diagram of the first structure of a speaker provided in an embodiment of this application.

[0036] This application provides a speaker 100, which is an electroacoustic conversion device that converts input electrical signals into sound signals and amplifies and processes the sound to achieve audio playback. This speaker 100 can be widely used in various electronic devices such as smartphones, tablets, laptops, smart TVs, and portable Bluetooth speakers to enhance the audio output performance of the devices and provide users with a better listening experience.

[0037] The speaker enclosure 100 includes a cabinet 10 and a first passive radiator 20 disposed on the cabinet 10. The cabinet 10 constitutes the main support structure of the speaker enclosure 100, which is used to house and fix the sound-producing elements inside, such as loudspeaker units and passive radiators, and at the same time forms the required acoustic cavity.

[0038] Specifically, the enclosure 10 includes an enclosure wall 11 and a protrusion 12. The enclosure wall 11 encloses a sound cavity 111, which is a closed or nearly closed cavity inside the enclosure 10. This cavity is a key area for sound resonance and amplification, and its size, shape, and internal structure directly affect the acoustic characteristics of the speaker, such as low-frequency response and sound pressure level. The protrusion 12 is connected to the side of the enclosure wall 11 facing the sound cavity 111 and protrudes inward from the enclosure wall 11, extending into the sound cavity 111. The protrusion 12 protrudes along a first direction (e.g., a direction perpendicular to the enclosure wall 11).

[0039] The first passive radiator 20, also known as a passive radiator (PR), is an important acoustic component in the speaker enclosure 100. It does not have its own voice coil or magnetic circuit driving unit; instead, it vibrates due to the sound pressure generated by the vibration of the active speaker within the acoustic cavity 111, thereby radiating sound waves. This is particularly useful for enhancing the system's low-frequency response efficiency, extending the low-frequency lower limit, and improving distortion characteristics. The first passive radiator 20 can vibrate along a second direction under the influence of sound pressure; this second direction is typically its normal direction or the main vibration direction.

[0040] In this embodiment, the protrusion direction (i.e., the first direction) of the protrusion 12 intersects with the vibration direction (i.e., the second direction) of the first passive radiator 20. Optionally, the first direction and the second direction are perpendicular to each other. This structural design enables the protrusion 12 to provide good local reinforcement to the enclosure wall 11 in the area surrounding the first passive radiator 20, significantly improving the structural rigidity and strength of this part, thereby suppressing harmful deformation and resonance modes of the enclosure wall 11 caused by sound pressure vibration, reducing the resulting abnormal noise and sound quality degradation problems, and improving the overall acoustic performance and reliability of the speaker 100.

[0041] The above structural design can effectively improve the acoustic and mechanical problems caused by insufficient structural strength of the cabinet while ensuring the requirements of the speaker are light, thin and small. It has both good practicality and advanced features.

[0042] Please see Figure 2 , Figure 2 This is a first exploded view of a speaker provided in an embodiment of this application. The speaker enclosure 10 includes an enclosure wall 11 and a protrusion 12, the protrusion 12 being connected to the side of the enclosure wall 11 facing the sound cavity 111. The combined design of the enclosure wall 11 and the protrusion 12 increases the structural strength of the enclosure wall 11, improves the bending stiffness of the enclosure wall 11, and can prevent the enclosure wall 11 from shaking during the vibration of the first passive radiator 20.

[0043] Furthermore, due to the increased structural strength of the enclosure wall 11 of the speaker enclosure 10, its natural frequency range is broadened. According to vibration theory, every object has its inherent vibration frequency. When the external excitation frequency is close to the object's natural frequency, resonance will occur (vibration of the enclosure 10 or vibration of the passive radiator). In the speaker enclosure 100, resonance will cause the non-actively sounding structural components of the speaker enclosure 100 to produce noise, i.e., vibration, such as abnormal humming or resonant sounds, which seriously affects the clarity and fidelity of the sound. The speaker enclosure 100 of this application, by increasing the structural strength of the enclosure wall 11, broadens the natural frequency range and reduces the possibility of overlapping with the external excitation frequency, thereby avoiding resonance.

[0044] A first clearance space 13 is formed between the box wall 11 and the protrusion 12 to accommodate the vibration displacement of the first passive radiator 20 and prevent the first passive radiator 20 from colliding with other parts of the box 10 during vibration.

[0045] During the operation of the speaker 100, the first passive radiator 20 reciprocates with the vibration of the air inside the speaker 100. Without the first clearance space 13, the first passive radiator 20 would easily collide with the cabinet wall 11 of the enclosure 10 during vibration, thus limiting its vibration amplitude and affecting the low-frequency performance of the speaker 100. By setting the first clearance space 13, the vibration amplitude of the first passive radiator 20 can be increased, allowing it to more fully exert its role in enhancing low-frequency performance, making the low-frequency extension of the speaker 100 deeper and stronger, and significantly improving the sound quality.

[0046] In existing technologies, structural strength is typically improved simply by increasing the thickness of the enclosure wall 11. However, while this method improves strength to some extent, it brings serious negative consequences. Increasing the wall thickness greatly compresses the design space of the acoustic components, making the already compact layout inside the speaker 100 even more cramped. The size adjustment and position optimization of sound components are severely limited, space utilization is greatly reduced, and ultimately the sound effect of the speaker 100 is significantly compromised. In the embodiment of this application, the main improvement is made to the structure of the enclosure wall 11, which not only improves the strength but also creates more sufficient clearance space for the first passive radiator 20. This allows its vibration amplitude to not only be maintained but also further optimized within a reasonable range, thereby significantly improving the low-frequency performance of the speaker 100 and making the sound fuller and more powerful.

[0047] The surface of the protrusion 12 near the sound cavity 111 is either flat or curved.

[0048] When the surface of the protrusion 12 is flat, the reflection law is relatively simple and direct when sound propagates within the acoustic cavity 111 and encounters planar reflection. According to the acoustic law of reflection, sound incident on a plane at a certain angle will be reflected out at a specific angle. This regular reflection helps to form a relatively stable sound field distribution within the acoustic cavity 111, allowing the sound energy to propagate and diffuse relatively evenly within the acoustic cavity 111.

[0049] When the surface of the protrusion 12 is curved, the shape of the curved surface can be precisely calculated and optimized according to the requirements of acoustic design, enabling precise guidance and control of the sound propagation path. Based on the waveguide principle in acoustics, the curved surface can modulate the wavefront of the sound, so that the sound forms a specific focusing or diffusion effect within the sound cavity 111.

[0050] Please see Figure 3 , Figure 3This is a first cross-sectional schematic diagram of a speaker provided in an embodiment of this application. In some cases, the speaker 100 has only one passive radiator, i.e., only a first passive radiator 20. In some small speakers 100 or speakers 100 that require optimization of sound in specific frequency bands, a well-designed passive radiator can effectively improve the low-frequency performance of the speaker 100, while avoiding potential interference problems between multiple passive radiators, thus simplifying the design and tuning process of the speaker 100.

[0051] In this case, the cross-sectional area of ​​the protrusion 12 gradually increases in the vibration direction of the first passive radiator 20, which is beneficial to enhancing the structural stability of the box wall 11. According to the principles of mechanics of materials, the larger the cross-sectional area of ​​a structure, the stronger its resistance to bending and deformation. The gradual increase in the cross-sectional area of ​​the protrusion 12 allows the box wall 11 to better disperse stress and reduce local stress concentration when subjected to external forces, thereby improving the bending stiffness and overall structural strength of the box wall 11.

[0052] The protrusion 12 has a sloping side facing the sound cavity 111, which is inclined inwards towards the sound cavity 111. When sound propagates to the sloping side, it is reflected according to the angle of inclination, allowing the sound to be distributed more evenly within the sound cavity 111 and preventing excessive concentration of sound in a localized area. The sloping design also facilitates airflow within the speaker enclosure 100. During speaker operation, the vibration of the first passive radiator 20 causes the air within the sound cavity 111 to vibrate, creating airflow. The sloping surface reduces airflow resistance, allowing air to flow more smoothly within the sound cavity 111, thereby improving the vibration efficiency of the first passive radiator 20.

[0053] Please see Figure 4 , Figure 4 This is a second explosion diagram of a speaker provided in an embodiment of this application.

[0054] In other cases, the speaker 100 may contain multiple passive radiators. This application embodiment uses two passive radiators as an example for detailed explanation. The speaker 100 also includes a second passive radiator 30, which is fixed to the speaker wall 11. The first passive radiator 20 is disposed opposite to the second passive radiator 30.

[0055] Please see Figure 5 , Figure 5This is a second cross-sectional schematic diagram of the speaker enclosure provided in an embodiment of this application. A second clearance space 14 is formed between the enclosure wall 11 and the protrusion 12. The second clearance space 14 is used to accommodate the vibration displacement of the second passive radiator 30. During the operation of the speaker enclosure 100, the second passive radiator 30 reciprocates with the vibration of the air inside the speaker enclosure 100. If its clearance space is restricted, it will lead to insufficient vibration, affecting the low-frequency performance of the speaker enclosure 100. The existence of the second clearance space 14 provides the second passive radiator 30 with sufficient vibration freedom, enabling it to maximize its vibration efficiency.

[0056] The first passive radiator 20 and the second passive radiator 30 can be arranged symmetrically. The symmetrical arrangement of the first passive radiator 20 and the second passive radiator 30 enables sound to be radiated evenly in the front-to-back direction of the speaker 100, avoiding sound field distortion caused by uneven radiation, and creating a wider and more realistic sound field environment for the user.

[0057] For details, please continue reading Figure 4 as well as Figure 5 The box wall 11 includes a first sub-wall 112, a second sub-wall 113, a third sub-wall 114 and a fourth sub-wall 115 connected in sequence. The first sub-wall 112 and the third sub-wall 114 are arranged opposite to each other, and the second sub-wall 113 and the fourth sub-wall 115 are arranged opposite to each other.

[0058] The first sub-wall 112 and the third sub-wall 114 are arranged opposite each other along a first direction, and the second sub-wall 113 and the fourth sub-wall 115 are arranged opposite each other along a second direction.

[0059] The protrusion 12 is disposed on the first sub-wall 112. The first passive radiator 20 is disposed on the second sub-wall 113, and the second passive radiator 30 is disposed on the fourth sub-wall 115, respectively located on both sides of the protrusion 12.

[0060] The number of protrusions 12 can also be two, respectively disposed on the inner surface of the first sub-wall 112 and extending toward the sound cavity 111, and disposed on the inner surface of the third sub-wall 114 and extending toward the sound cavity 111.

[0061] The protrusions 12 of the first sub-wall 112 and the third sub-wall 114 are arranged opposite to each other. For example, the protrusions 12 of the first sub-wall 112 and the protrusions 12 of the third sub-wall 114 are symmetrically arranged. From a structural mechanics perspective, the symmetrical design allows the speaker 100 to experience more uniform stress in all directions when subjected to external forces. From an acoustic performance perspective, the symmetrical design is beneficial for the uniform propagation and resonance of sound within the acoustic cavity 111. In the symmetrical acoustic cavity 111 structure, the propagation paths and reflection characteristics of sound on both sides are basically the same, which can create a more stable sound field environment.

[0062] In this embodiment, the speaker 100 can be narrow and elongated to optimize the sound propagation path within a limited space, enhance the acoustic performance of specific frequency bands, or meet specific installation and usage requirements. The first sub-wall 112 and the third sub-wall 114 are two opposing enclosure walls 11 in the width direction of the speaker 100. The first passive radiator 20 can overlap the first sub-wall 112 and the third sub-wall 114, that is, the projection of the first passive radiator 20 in the thickness direction overlaps with the projection of the first sub-wall 112 or the third sub-wall 114 in the thickness direction, so as to maximize the aspect ratio of the first passive radiator 20. When the aspect ratio of the first passive radiator 20 increases, its vibration mode becomes more complex and diverse, which can excite more low-frequency vibration modes, thereby enhancing the generation and radiation of low-frequency sound.

[0063] From a structural stability perspective, attaching the first passive radiator 20 to the two opposing enclosure walls 11 utilizes the supporting effect of the enclosure walls 11 to improve the installation stability of the first passive radiator 20. During the operation of the speaker 100, the first passive radiator 20 will reciprocate due to the vibration of the air inside the speaker 100. If the installation is unstable, it is easy to cause shaking and noise, affecting the sound quality of the speaker 100. However, attaching it to the two opposing enclosure walls 11 allows the first passive radiator 20 to be constrained horizontally by the enclosure walls 11, reducing shaking and displacement, thereby ensuring the normal operation of the speaker 100.

[0064] Based on the above, please continue reading Figure 4 The second sub-wall 113 is further provided with an installation opening 1131 to engage the first passive radiator 20. Specifically, the second sub-wall 113 has an installation opening 1131, through which the first sub-wall 112 and the third sub-wall 114 are partially exposed. The shape and size of the installation opening 1131 are designed according to the shape of the first passive radiator 20, which is embedded within the installation opening 1131.

[0065] The periphery of the mounting opening 1131 of the first passive radiator 20 is provided with a snap-fit ​​groove. The depth and width of the snap-fit ​​groove are closely matched with the thickness and width of the first folded edge 22 of the first passive radiator 20, ensuring that the first passive radiator 20 is firmly fixed on the second sub-wall 113.

[0066] Furthermore, the snap-fit ​​slot includes a first slot segment, a second slot segment, a third slot segment, and a fourth slot segment connected in sequence. This segmented snap-fit ​​slot structure can constrain and fix the first passive radiator 20 from multiple directions, effectively improving the stability and reliability of the installation.

[0067] The first and second slot segments respectively engage with the two long sides of the first passive radiator 20. The first slot segment can be formed by the inner wall of the mounting opening 1131 and the first sub-wall 112. The third slot segment can be formed by the inner wall of the mounting opening 1131 and the third sub-wall 114. The third and fourth slot segments respectively engage with the two short sides of the first passive radiator 20. The third and fourth slot segments are respectively formed on the second sub-wall 113. This segmented engaging slot structure design allows the first passive radiator 20 to receive uniform engaging force from four directions (long and short sides) during installation, achieving omnidirectional fixation.

[0068] Please continue reading. Figure 5 The first passive radiator 20 includes a first diaphragm 21 and a first folded edge 22 surrounding the first diaphragm 21. The first folded edge 22 overlaps the first sub-wall 112 and the third sub-wall 114.

[0069] The first diaphragm 21 is the core sound-generating component of the first passive radiator 20, and is generally made of lightweight, highly elastic materials, such as paper, plastic, or metal. When subjected to air pressure or sound waves, the first diaphragm 21 vibrates, thereby radiating sound. Its vibration characteristics directly affect the acoustic performance of the passive radiator, such as frequency response and distortion.

[0070] The first fold 22 is typically made of a soft and elastic material, such as rubber or foam. The main function of the first fold 22 is to provide a certain degree of elasticity and support for the first diaphragm 21, allowing the first diaphragm 21 to vibrate freely within a reasonable range. At the same time, it also serves to seal and dampen vibrations, preventing sound leakage and reducing unnecessary vibration interference.

[0071] The first passive radiator 20 also includes a first mass block 23, which is disposed on the first diaphragm 21. The presence of the first mass block 23 can adjust the vibration characteristics of the first diaphragm 21. By changing its mass, the vibration frequency and amplitude of the first diaphragm 21 can be precisely controlled, thereby further optimizing the acoustic performance of the first passive radiator 20.

[0072] In some of the embodiments described above, please continue to refer to Figure 5The speaker 100 also includes a second passive radiator 30, which has the same structure, material, and fixing method as the first passive radiator 20 and is symmetrically distributed. The second passive radiator 30 consists of a second diaphragm 31 and a second flange 32 surrounding the second diaphragm 31. Similarly, the second passive radiator 30 also has a second mass block 33 mounted on the second diaphragm 31. Furthermore, the first mass block 23 and the second mass block 33 have the same mass; this identical mass design ensures the balance and consistency of the two passive radiators during vibration. Moreover, the elastic modulus of the first flange 22 and the second flange 32 are also set to be the same, ensuring that under the same external conditions, the first passive radiator 20 and the second passive radiator 30 can produce similar vibration responses, thereby improving the overall sound effect of the speaker 100.

[0073] Please see Figure 6 , Figure 6 This is a schematic diagram of a second structure of the speaker provided in an embodiment of this application. The speaker 100 also includes a loudspeaker 40, which is fixed to the enclosure 10. The sound waves emitted by the loudspeaker 40 drive the first passive radiator 20 to vibrate through the acoustic cavity 111.

[0074] During the operation of the speaker 100, the sound waves emitted by the speaker 40 drive the first passive radiator 20 to vibrate through the acoustic cavity 111. When the speaker 40 receives an electrical signal, its voice coil vibrates in the magnetic field, causing the first diaphragm 21 to vibrate and radiate sound. These sounds propagate within the acoustic cavity 111, creating a certain change in air pressure. Since the first diaphragm 21 of the first passive radiator 20 is exposed in the acoustic cavity 111, and its first folded edge 22 is sealed to the snap-fit ​​groove of the second sub-wall 113, the change in air pressure within the acoustic cavity 111 acts on the first diaphragm 21 of the first passive radiator 20, causing it to vibrate accordingly. After multiple reflections and interferences within the acoustic cavity 111, the sound waves emitted by the speaker 40 can effectively drive the first passive radiator 20 to resonate in the low-frequency range, thereby enhancing the low-frequency output of the speaker 100.

[0075] When the speaker 100 also includes a second passive radiator 30, the second passive radiator 30 is symmetrically arranged with the first passive radiator 20. Under the action of the loudspeaker 40, the first passive radiator 20 and the second passive radiator 30 vibrate in opposite directions.

[0076] The acoustic cavity 111 includes a first rear cavity 1111, a second rear cavity 1112, and a conduit 1113. The conduit 1113 connects the first rear cavity 1111 and the second rear cavity 1112. The first passive radiator 20 corresponds to the first rear cavity 1111, and the loudspeaker 40 corresponds to the second rear cavity 1112.

[0077] When the first passive radiator 20 vibrates, the air in the first rear cavity 1111 is compressed and expanded along with the movement of the first diaphragm 21. This compression and expansion process is coupled with the vibration of the first passive radiator 20, jointly affecting the low-frequency response characteristics of the speaker 100. The second rear cavity 1112 corresponds to the speaker 40, providing a suitable air back cavity for the vibration of the speaker 40. The conduit 1113 transmits the sound waves generated by the speaker 40 to the first rear cavity 1111 through acoustic coupling, driving the first passive radiator 20 to vibrate. When the speaker 100 also includes a second passive radiator 30, both the first passive radiator 20 and the second passive radiator 30 correspond to the first rear cavity 1111. In this configuration, the sound waves emitted by the loudspeaker 40 are guided by the pipe 1113 to the first rear cavity 1111 where the first passive radiator 20 and the second passive radiator 30 are located. Therefore, the first passive radiator 20 and the second passive radiator 30 can receive the sound waves emitted by the loudspeaker 40 in a relatively synchronous manner, so that the first passive radiator 20 and the second passive radiator 30 vibrate.

[0078] When the number of passive radiators varies, the strength of the enclosure wall 11 can be effectively improved by designing the shape of the enclosure wall 11 accordingly, thereby reducing the generation of vibration noise. The following will provide a detailed explanation through specific examples.

[0079] In a direction perpendicular to the first direction, for example, in the direction from the second sub-wall 113 toward the fourth sub-wall 115, the protrusion 12 includes a first sub-protrusion 121 and a second sub-protrusion 122 connected in sequence. The cross-sectional area of ​​the first sub-protrusion 121 gradually increases, while the cross-sectional area of ​​the second sub-protrusion 122 gradually decreases. By providing the structure of the protrusion 12, the strength of the enclosure wall 11 is effectively increased, enabling the speaker 100 to maintain better structural stability when subjected to external forces or changes in internal air pressure, and reducing the risk of deformation and damage caused by vibration or collision.

[0080] Specifically, in a direction perpendicular to the first direction, for example, in the direction from the second sub-wall 113 to the fourth sub-wall 115, the inner surface of the first sub-protrusion 121 is inclined toward the interior of the sound cavity 111; the inner surface of the second sub-protrusion 122 is inclined toward a direction away from the interior of the sound cavity 111. This inclined design further optimizes the reflection and propagation of sound within the sound cavity 111.

[0081] It is understandable that the inner surfaces of the first sub-protrusion 121 and the second sub-protrusion 122 are smooth planes or surfaces, which can ensure that the sound maintains a relatively stable propagation direction and energy distribution during propagation.

[0082] Please continue reading. Figure 5When the inner surfaces of the first sub-protrusion 121 and the second sub-protrusion 122 are curved, when viewed from the cross-section along the length of the speaker 100, the inner surfaces of the first sub-protrusion 121 and the second sub-protrusion 122 on the two opposing cabinet walls 11 can form a shape similar to an equiaxed hyperbola.

[0083] From an acoustic perspective, the equiaxial hyperbola shape enables precise guidance and control of the sound propagation path. According to waveguide theory in acoustics, the equiaxial hyperbola waveguide structure can maintain a stable phase relationship during sound propagation, reducing sound distortion and phase deviation.

[0084] From the perspective of structural strength, the design of the equiaxial hyperbola shape can reduce local stress concentration and make the stress distribution more uniform when the protrusion 12 is subjected to external forces, thereby improving the bending stiffness and overall strength of the structure.

[0085] Please see Figure 7 , Figure 7 This is a third cross-sectional schematic diagram of the speaker provided in the embodiments of this application. When the inner surfaces of the first sub-protrusion 121 and the second sub-protrusion 122 are planes, the inner surfaces of the first sub-protrusion 121 and the second sub-protrusion 122 can form an isosceles triangle shape when viewed from the cross-section along the length of the speaker 100, which helps to improve structural stability and optimize acoustic performance.

[0086] Please see Figure 8 , Figure 8 This is a fourth cross-sectional schematic diagram of the speaker provided in an embodiment of this application. The protrusion 12 further includes a third sub-protrusion 123, which is disposed between the first sub-protrusion 121 and the second sub-protrusion 122. The inclination angle of the inner surface of the third sub-protrusion 123 relative to a direction perpendicular to the first direction, such as the direction from the second sub-wall 113 towards the fourth sub-wall 115, is smaller than the inclination angle of the inner surface of the first sub-protrusion 121; or, the inclination angle of the inner surface of the third sub-protrusion 123 relative to a direction perpendicular to the first direction, such as the direction from the second sub-wall 113 towards the fourth sub-wall 115, is smaller than the inclination angle of the inner surface of the second sub-protrusion 122. This third sub-protrusion 123 facilitates increasing the volume of the sound cavity 111, providing a wider propagation space for sound. The increased volume of the sound cavity 111 can reduce the resonant frequency of the sound, enabling the speaker 100 to better reproduce low-frequency sounds.

[0087] Furthermore, the inner surface of the third sub-protrusion 123 near the acoustic cavity 111 can be parallel to the vibration direction of the first passive radiator 20. The flat inner surface of the third sub-protrusion can reduce sound wave reflection disturbance and optimize low-frequency propagation. Viewed in cross-section along the length of the speaker 100, the inner surfaces of the first sub-protrusion 121, the second sub-protrusion 122, and the third sub-protrusion 123 can form a shape similar to a right-angled trapezoid. The combination of the hypotenuse and the right-angled side can guide the sound to form an orderly sound field distribution inside the speaker 100. Therefore, the third sub-protrusion 123, through increasing the volume of the acoustic cavity 111, guiding sound transition, adopting a parallel inner surface design, and forming a right-angled trapezoidal shape, brings significant advantages to the speaker 100 from multiple dimensions, including acoustic performance optimization and structural stability improvement.

[0088] Please see Figure 9 , Figure 9 This is a fifth cross-sectional schematic diagram of the speaker provided in this application embodiment. The protrusion 12 extends along a first direction until it connects with the enclosure wall 11 to form a connecting layer 15. For example, the protrusion 12 extends towards the second sub-wall 113, and the protrusion 12 connects with the third sub-wall 114 to form the connecting layer 15. The first passive radiator 20 and the second passive radiator 30 are respectively disposed on both sides of the connecting layer 15. The connecting layer 15 connects at least the opposing first sub-wall 112 and third sub-wall 114 together to form an organic whole. The connecting layer 15 can evenly distribute these forces, reducing the concentration of local stress, thereby effectively preventing the speaker 100 structure from deforming or being damaged due to uneven stress. The first passive radiator 20 and the second passive radiator 30 can be symmetrically arranged relative to the connecting layer 15, which is beneficial for the uniform radiation of sound in the front-rear direction of the speaker 100.

[0089] This application provides an electronic device, which can be a thin structure such as a smart TV, ultrabook, or tablet computer. The electronic device includes a housing and a speaker 100, which is the speaker 100 in the above embodiment. The speaker 100 can be disposed inside the housing and has a corresponding sound outlet hole in the housing.

[0090] For televisions, speakers 100 are usually placed below or on the sides of the television screen. Through reasonable structural design, the sound output direction of speakers 100 is matched with the viewing direction of the television screen, ensuring that users can get the best audio experience when watching television.

[0091] In summary, the electronic device provided in this application, by adopting the speaker 100 with the above-mentioned innovative structure and rationally arranging it within the housing, effectively solves the technical problem of audio output in thin electronic devices, providing users with a high-quality, immersive audio experience.

[0092] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0093] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0094] The speaker and electronic device provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A speaker, characterized in that, include: The enclosure includes an enclosure wall and a protrusion. The enclosure wall surrounds and forms a sound cavity. The protrusion is connected to the side of the enclosure wall facing the sound cavity. The protrusion protrudes inward from the side of the enclosure wall facing the sound cavity and protrudes along a first direction. A first passive radiator is fixed to the box wall and vibrates along a second direction. Wherein, the first direction intersects with the second direction.

2. The speaker according to claim 1, characterized in that, A first clearance space is formed between the box wall and the protrusion to accommodate the vibration displacement of the first passive radiator.

3. The speaker according to claim 2, characterized in that, In the vibration direction of the first passive radiator, the cross-sectional area of ​​the protrusion gradually increases.

4. The speaker according to claim 3, characterized in that, The side of the protrusion facing the sound cavity is an inclined surface, and the inclined surface is inclined toward the inside of the sound cavity.

5. The speaker according to claim 1, characterized in that, It also includes a second passive radiator, which is fixed to the wall of the enclosure and is positioned opposite to the first passive radiator.

6. The speaker according to claim 5, characterized in that, The enclosure wall includes a first sub-wall, a second sub-wall, a third sub-wall, and a fourth sub-wall connected in sequence. The first sub-wall and the third sub-wall are arranged opposite each other, and the second sub-wall and the fourth sub-wall are arranged opposite each other. The protrusion is arranged on the first sub-wall. The first passive radiator is arranged on the second sub-wall, and the second passive radiator is arranged on the fourth sub-wall, so as to be located on both sides of the protrusion.

7. The speaker according to claim 6, characterized in that, The second sub-wall is provided with an installation opening, and the first sub-wall and the third sub-wall are partially exposed in the installation opening. The first passive radiator is embedded in the installation opening. The first passive radiator includes a first diaphragm and a first folded edge surrounding the first diaphragm. The first folded edge overlaps the first sub-wall and the third sub-wall.

8. The speaker according to claim 5, characterized in that, In the direction perpendicular to the first direction, the protrusion includes a first sub-protrusion and a second sub-protrusion connected in sequence, wherein the cross-sectional area of ​​the first sub-protrusion gradually increases and the cross-sectional area of ​​the second sub-protrusion gradually decreases.

9. The speaker according to claim 8, characterized in that, In a direction perpendicular to the first direction, the inner surface of the first sub-protrusion is inclined toward the interior of the sound cavity; the inner surface of the second sub-protrusion is inclined toward a direction away from the interior of the sound cavity.

10. The speaker according to claim 9, characterized in that, The protrusion further includes a third sub-protrusion, which is disposed between the first sub-protrusion and the second sub-protrusion. The inclination angle of the inner surface of the third sub-protrusion relative to the first direction is smaller than the inclination angle of the inner surface of the first sub-protrusion; or, the inclination angle of the inner surface of the third sub-protrusion relative to the first direction is smaller than the inclination angle of the inner surface of the second sub-protrusion.

11. The speaker according to claim 5, characterized in that, The protrusion extends along the first direction until it connects with the box wall to form a connecting layer; the first passive radiator and the second passive radiator are respectively disposed on both sides of the connecting layer.

12. The speaker according to any one of claims 1 to 11, characterized in that, It also includes a loudspeaker, which is fixed to the enclosure, and the sound waves emitted by the loudspeaker drive the first passive radiator to vibrate through the acoustic cavity.

13. The speaker according to claim 12, characterized in that, The acoustic cavity includes a first rear cavity, a second rear cavity, and a conduit. The conduit connects the first rear cavity and the second rear cavity. The first passive radiator corresponds to the first rear cavity, and the loudspeaker corresponds to the second rear cavity.

14. An electronic device, characterized in that, include: case; A speaker, wherein the speaker is disposed within the housing, and the speaker is the speaker according to any one of claims 1 to 13.

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