A sound box and a sound system

Abstract

This application relates to a speaker and an audio system. The speaker includes: a voice coil assembly, a cavity wall, and a radiating plate; the cavity wall surrounds the outer periphery of the voice coil assembly, and the voice coil assembly and the cavity wall form independent first, second, and third sound cavities; the voice coil assembly rotates relative to the cavity wall to change the volume of the first, second, and third sound cavities; the radiating plate surrounds the outer periphery of the cavity wall and, together with the cavity wall, forms independent first, second, and third radiation cavities, the first radiation cavity communicating with the first sound cavity, the second radiation cavity communicating with the second sound cavity, and the third radiation cavity communicating with the third sound cavity; when the voice coil assembly rotates relative to the cavity wall, the volumes of the first, second, and third sound cavities change, thereby compressing the air inside the first, second, and third sound cavities, and transmitting this air through the first, second, and third radiation cavities to the radiating plate, causing the radiating plate to vibrate. The speaker achieves miniaturization.

Description

Technical Field

[0001] This application relates to the field of speaker technology, specifically to a speaker and audio system. Background Technology

[0002] As the terminal of the entire audio system, the speaker enclosure's function is to convert audio electrical energy into corresponding sound energy and radiate it into space. Existing speaker enclosures primarily rely on the sealed rear cavity of the speaker to provide driving force for the passive radiator, causing it to vibrate. The passive radiator and the speaker diaphragm then emit in-phase sound, achieving a low-frequency enhancement effect. However, when designing multiple passive radiators, multiple corresponding speakers are required, with each passive radiator and speaker housed in a separate cavity. This occupies considerable space and hinders speaker miniaturization. Summary of the Invention

[0003] In view of this, this application provides a speaker and an audio system, wherein the speaker can drive the radiating plate located in different radiating cavities to vibrate simultaneously through a voice coil assembly, without occupying a lot of space, which is conducive to miniaturizing the speaker size.

[0004] This application provides a speaker, comprising: a voice coil assembly, a cavity wall, and a radiating plate; the cavity wall surrounds the outer periphery of the voice coil assembly, and the voice coil assembly and the cavity wall form independent first, second, and third cavities; the voice coil assembly is rotatable relative to the cavity wall to change the volume of the first, second, and third cavities; the radiating plate surrounds the outer periphery of the cavity wall and forms independent first, second, and third radiating cavities with the cavity wall, the first radiating cavity communicating with the first cavity, the second radiating cavity communicating with the second cavity, and the third radiating cavity communicating with the third cavity; when the voice coil assembly rotates relative to the cavity wall, the volumes of the first, second, and third cavities all change, thereby compressing the air inside the first, second, and third cavities, and transmitting it to the radiating plate through the first, second, and third radiating cavities, causing the radiating plate to vibrate.

[0005] Furthermore, the radiating plate includes a first radiating sub-plate, a second radiating sub-plate, and a third radiating sub-plate connected in sequence. The first radiating sub-plate and the acoustic cavity wall form a first radiating cavity; the second radiating sub-plate and the acoustic cavity wall form a second radiating cavity; and the third radiating sub-plate and the acoustic cavity wall form a third radiating cavity.

[0006] Furthermore, the voice coil assembly includes a support and a coil. The support and the cavity wall form independent first, second, and third sound cavities. The coil is disposed on the support. When a first current is applied to the coil, the support rotates relative to the cavity wall in a first direction. When a second current is applied to the coil, the support rotates relative to the cavity wall in a second direction. The direction of the first current is opposite to the direction of the second current, and the first direction is opposite to the second direction.

[0007] Furthermore, the voice coil assembly also includes a first gear and a second gear, the first gear being sleeved on the outer periphery of the second gear and meshing with the second gear, the second gear passing through the bracket and being fixedly connected to the bracket; when the coil is loaded with a first current, the bracket rotates about the second gear relative to the acoustic cavity wall in a first direction; when the coil is loaded with a second current, the bracket rotates about the second gear relative to the acoustic cavity wall in a second direction.

[0008] Furthermore, the bracket can rotate relative to the acoustic cavity wall around the pivot, and the first gear is connected to the bracket. Along a cross-section perpendicular to the pivot, the center of the first gear coincides with the center of the bracket.

[0009] Furthermore, the bracket can rotate relative to the acoustic cavity wall around the pivot axis, and the cross-section of the bracket along the direction perpendicular to the pivot axis is a Reicheltz triangle. During the rotation of the bracket, the three corners of the Reicheltz triangle abut against the inner wall of the acoustic cavity wall.

[0010] Furthermore, the speaker also includes a magnet, which is disposed opposite to the voice coil assembly. When a first current is applied to the coil, the magnetic poles generated by the portion of the coil near the magnet are the same as the magnetic poles of the portion of the magnet near the coil, thereby driving the bracket to rotate relative to the acoustic cavity wall in a first direction. When a second current is applied to the coil, the magnetic poles generated by the portion of the coil near the magnet are opposite to the magnetic poles of the portion of the magnet near the coil, thereby driving the bracket to rotate relative to the acoustic cavity wall in a second direction.

[0011] Furthermore, the magnet includes a first sub-magnet and a second sub-magnet, which are spaced apart on opposite sides of the voice coil assembly.

[0012] Furthermore, the voice coil assembly includes a support and a coil, the coil being disposed on the support and located within the magnetic field range generated by the first sub-magnet and the second sub-magnet.

[0013] Furthermore, when the voice coil assembly rotates relative to the cavity wall, the sum of the volumes of the first cavity, the second cavity, and the third cavity remains unchanged.

[0014] This application also provides an audio system, which includes: a speaker, a sound source system, and a power amplifier provided in this application. The sound source system is electrically connected to the speaker and provides an audio signal to the speaker. The power amplifier is electrically connected to both the sound source system and the speaker and is used to amplify the audio signal provided by the sound source system.

[0015] In the speaker provided in this embodiment, when the voice coil assembly rotates relative to the acoustic cavity wall, the volumes of the first acoustic cavity, the second acoustic cavity, and the third acoustic cavity change, thereby driving the airflow in the first, second, and third acoustic cavities respectively. Since the first radiating cavity is connected to the first acoustic cavity, the air in the first acoustic cavity is squeezed into the first radiating cavity. The change in airflow in the first radiating cavity acts on the portion of the radiating plate located in the first radiating cavity, causing that portion of the radiating plate to vibrate passively. Similarly, since the second radiating cavity is connected to the second acoustic cavity, the air in the second acoustic cavity is squeezed into the second radiating cavity. The change in airflow in the second radiating cavity acts on the portion of the radiating plate located in the second radiating cavity, causing that portion of the radiating plate to vibrate passively. Furthermore, since the third radiating cavity is connected to the third acoustic cavity, the air in the third acoustic cavity is squeezed into the third radiating cavity. The change in airflow in the third radiating cavity acts on the portion of the radiating plate located in the third radiating cavity, causing that portion of the radiating plate to vibrate passively. In the embodiments of this application, the radiating plate and the acoustic cavity wall form an independent first radiating cavity, a second radiating cavity, and a third radiating cavity. The portions of the radiating plate located in different radiating cavities can vibrate simultaneously without interfering with each other, which improves the low-frequency effect of the speaker and increases the space utilization of the speaker, which is conducive to realizing the miniaturization design of the speaker. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the implementation will be briefly introduced below. Obviously, the drawings described below are some implementations of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a top view of a speaker according to an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the structure of a voice coil assembly according to an embodiment of this application;

[0019] Figure 3This is a top view of a speaker according to another embodiment of this application;

[0020] Figure 4 This is a top view of a speaker according to another embodiment of this application;

[0021] Figure 5 This is a side view of a speaker according to an embodiment of this application;

[0022] Figure 6 This is a circuit block diagram of an audio system according to an embodiment of this application.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100-Speaker enclosure, 110-Voice coil assembly, 111-Bracket, 112-Coil, 113-First gear, 114-Second gear, 120-Cavity wall, 121-First cavity, 122-Second cavity, 123-Third cavity, 130-Radiator plate, 131-First radiating cavity, 132-Second radiating cavity, 133-Third radiating cavity, 134-First radiating sub-board, 135-Second radiating sub-board, 136-Third radiating sub-board, 140-Magnet, 141-First sub-magnet, 142-Second sub-magnet, 200-Sound system, 210-Sound source system, 220-Power amplifier. Detailed Implementation

[0025] 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 some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0027] In this document, references to "embodiment" or "implementation" mean that a particular feature, structure, or characteristic described in connection with an embodiment or implementation may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] Existing speaker enclosures primarily rely on the sealed rear cavity of the speaker to drive the passive radiator. When the speaker operates, the speaker diaphragm vibrates, pushing air into the rear cavity. The airflow in the rear cavity interacts with the passive radiator, causing it to vibrate and produce a sound in phase with the speaker diaphragm, thus enhancing the low-frequency response. However, when designing multiple passive radiators, multiple corresponding speakers are required. If multiple speakers share the same cavity, it can cause inconsistencies in sound phase. If each passive radiator and speaker is housed in a separate cavity, it requires more space, hindering the miniaturization of the speaker enclosure.

[0029] Please see Figure 1 This application provides a speaker 100, which includes a voice coil assembly 110, a cavity wall 120, and a radiating plate 130. The cavity wall 120 surrounds the outer periphery of the voice coil assembly 110, and the voice coil assembly 110 and the cavity wall 120 form independent first cavity 121, second cavity 122, and third cavity 123. The voice coil assembly 110 is rotatable relative to the cavity wall 120 to change the volume of the first cavity 121, the second cavity 122, and the third cavity 123. The radiating plate 130 surrounds the outer periphery of the cavity wall 120 and forms independent first radiating cavities 121, 122, and 123 with the cavity wall 120. The system includes a first radiation cavity 131 connected to the first sound cavity 121, a second radiation cavity 132 connected to the second sound cavity 122, and a third radiation cavity 133 connected to the third sound cavity 123. When the voice coil assembly 110 rotates relative to the sound cavity wall 120, the volumes of the first sound cavity 121, the second sound cavity 122, and the third sound cavity 123 all change, thereby compressing the air inside the first sound cavity 121, the second sound cavity 122, and the third sound cavity 123. This compressed air is then transmitted to the radiation plate 130 through the first radiation cavity 131, the second radiation cavity 132, and the third radiation cavity 133, causing the radiation plate 130 to vibrate.

[0030] Understandably, the voice coil assembly 110 can rotate relative to the cavity wall 120 to change the volume of the first cavity 121, the second cavity 122, and the third cavity 123, so that the air in the first cavity 121, the second cavity 122, and the third cavity 123 will flow due to compression.

[0031] Optionally, in some embodiments, one of the volumes of the first acoustic cavity 121, the second acoustic cavity 122, and the third acoustic cavity 123 is increased, while the other two are decreased. In other embodiments, two of the volumes of the first acoustic cavity 121, the second acoustic cavity 122, and the third acoustic cavity 123 are increased, while the other is decreased.

[0032] Understandably, in the embodiments of this application, the first sound cavity 121, the second sound cavity 122, and the third sound cavity 123 are independent of each other, and the first radiation cavity 131, the second radiation cavity 132, and the third radiation cavity 133 are independent of each other. Therefore, the space formed by the first sound cavity 121 and the first radiation cavity 131 is an independent and sealed space, the space formed by the second sound cavity 122 and the second radiation cavity 132 is an independent and sealed space, and the space formed by the third sound cavity 123 and the third radiation cavity 133 is an independent and sealed space.

[0033] Understandably, when the voice coil assembly 110 rotates relative to the cavity wall 120, the first cavity 121 is connected to the first radiation cavity 131, the second cavity 122 is connected to the second radiation cavity 132, and the third cavity 123 is connected to the third radiation cavity 133.

[0034] In the embodiments of this application, when the voice coil assembly 110 rotates relative to the acoustic cavity wall 120, the volumes of the first acoustic cavity 121, the second acoustic cavity 122, and the third acoustic cavity 123 change, thereby causing airflow in the first acoustic cavity 121, the second acoustic cavity 122, and the third acoustic cavity 123, respectively. Since the first radiation cavity 131 is connected to the first acoustic cavity 121, the air in the first acoustic cavity 121 is squeezed into the first radiation cavity 131. The change in airflow in the first radiation cavity 131 acts on the portion of the radiation plate 130 located in the first radiation cavity 131, causing that portion of the radiation plate 130 located in the first radiation cavity 131 to passively vibrate. The second radiation cavity 132 is connected to the second sound cavity 122. Air in the second sound cavity 122 is forced into the second radiation cavity 132. The change in airflow in the second radiation cavity 132 acts on the portion of the radiation plate 130 located within the second radiation cavity 132, causing that portion of the radiation plate 130 to vibrate passively. The third radiation cavity 133 is connected to the third sound cavity 123. Air in the third sound cavity 123 is forced into the third radiation cavity 133. The change in airflow in the third radiation cavity 133 acts on the portion of the radiation plate 130 located within the third radiation cavity 133, causing that portion of the radiation plate 130 to vibrate passively. In the embodiments of this application, the radiating plate 130 and the acoustic cavity wall 120 form an independent first radiating cavity 131, a second radiating cavity 132 and a third radiating cavity 133. The portions of the radiating plate 130 located in different radiating cavities can vibrate simultaneously without interfering with each other, which improves the low-frequency effect of the speaker 100 and increases the space utilization of the speaker 100, which is conducive to realizing the miniaturization design of the speaker 100.

[0035] In some embodiments, the radiating plate 130 includes a first radiating sub-plate 134, a second radiating sub-plate 135, and a third radiating sub-plate 136 connected in sequence. The first radiating sub-plate 134 and the acoustic cavity wall 120 form a first radiating cavity 131; the second radiating sub-plate 135 and the acoustic cavity wall 120 form a second radiating cavity 132; and the third radiating sub-plate 136 and the acoustic cavity wall 120 form a third radiating cavity 133.

[0036] In the embodiments of this application, the first radiating sub-plate 134, the second radiating sub-plate 135, and the third radiating sub-plate 136 are respectively disposed in independent spaces. When the voice coil assembly 110 rotates relative to the cavity wall 120, it causes changes in the volume of the first cavity 121, the second cavity 122, and the third cavity 123. The first cavity 121 connects to the first radiating cavity 131 and causes changes in the airflow in the first radiating cavity 131. The airflow in the first radiating cavity 131 causes the first radiating sub-plate 134 to vibrate passively. The second cavity 122 connects to the second radiating cavity 132 and causes changes in the airflow in the second radiating cavity 132. The airflow in the second radiating cavity 132 causes the second radiating sub-plate 135 to vibrate passively. The third cavity 123 connects to the third radiating cavity 133 and causes changes in the airflow in the third radiating cavity 133. The airflow in the third radiating cavity 133 causes the third radiating sub-plate 136 to vibrate passively. In the embodiments of this application, the first radiating plate 130, the second radiating plate 130, and the third radiating plate 130 are driven to vibrate by the airflow in different radiating cavities. The first radiating plate 130, the second radiating plate 130, and the third radiating plate 130 can vibrate simultaneously without interfering with each other, so that the speaker 100 achieves the effect of enhancing the low frequency effect and improves the space utilization of the speaker 100, which is conducive to realizing the miniaturization design of the speaker 100.

[0037] Please see Figures 2 to 4 In some embodiments, the voice coil assembly 110 includes a support 111 and a coil 112. The support 111 and the acoustic cavity wall 120 form independent first acoustic cavities 121, second acoustic cavities 122, and third acoustic cavities 123. The coil 112 is disposed on the support 111. When a first current is applied to the coil 112, the support 111 moves relative to the acoustic cavity wall 120 along a first direction (e.g., ...). Figure 3 (as shown in X) rotates; when the coil 112 is loaded with a second current, the bracket 111 rotates relative to the acoustic cavity wall 120 along a second direction (e.g., as shown in X); Figure 4 (as shown in the middle Y) rotates; wherein the direction of the first current is opposite to the direction of the second current, and the first direction is opposite to the second direction.

[0038] Understandably, in the embodiments of this application, the coil 112 is disposed on the bracket 111, and when an alternating current is applied to the coil 112, the coil 112 will generate an alternating magnetic field.

[0039] In the embodiments of this application, the bracket 111 and the acoustic cavity wall 120 form independent first acoustic cavities 121, second acoustic cavities 122, and third acoustic cavities 123. When the voice coil assembly 110 rotates relative to the acoustic cavity wall 120, it causes airflow within the first acoustic cavity 121, second acoustic cavity 122, and third acoustic cavity 123, which in turn causes airflow within the first radiation cavity 131, second radiation cavity 132, and third radiation cavity 133. This allows the portions of the radiating plate 130 located in different radiation cavities to vibrate simultaneously without interference, improving the low-frequency performance of the speaker 100. In the embodiments of this application, changing the direction of the current applied to the coil 112 can change the direction of rotation of the voice coil assembly 110 relative to the acoustic cavity wall 120. When the coil 112 is loaded with a first current, the bracket 111 rotates relative to the acoustic cavity wall 120 in a first direction. When the coil 112 is loaded with a second current, the bracket 111 rotates relative to the acoustic cavity wall 120 in a second direction, so that the bracket 111 can reciprocate relative to the acoustic cavity wall 120.

[0040] Optionally, in some embodiments, the first direction is clockwise and the second direction is counterclockwise. In other embodiments, the first direction is counterclockwise and the second direction is clockwise.

[0041] Optionally, the bracket 111 rotates back and forth relative to the acoustic cavity wall 120 to continuously change the volume of the first acoustic cavity 121, the second acoustic cavity 122, and the third acoustic cavity 123, thereby causing the air to flow in the first radiation cavity 131, the second radiation cavity 132, and the third radiation cavity 133, so as to drive the first radiation sub-plate 134, the second radiation sub-plate 135, and the third radiation sub-plate 136 to vibrate.

[0042] Optionally, in some embodiments, the voice coil assembly 110 further includes a first gear 113 and a second gear 114. The first gear 113 is sleeved on the outer periphery of the second gear 114 and meshes with the second gear 114. The second gear 114 passes through the bracket 111 and is fixedly connected to the bracket 111. When the coil 112 is loaded with a first current, the bracket 111 rotates about the second gear 114 relative to the acoustic cavity wall 120 in a first direction. When the coil 112 is loaded with a second current, the bracket 111 rotates about the second gear 114 relative to the acoustic cavity wall 120 in a second direction.

[0043] In an embodiment of this application, the first gear 113 is sleeved on the outer periphery of the second gear 114 and meshes with the second gear 114. The second gear 114 passes through the bracket 111 and is fixedly connected to the bracket 111. Therefore, when the bracket 111 rotates around the second gear 114 relative to the acoustic cavity wall 120, the second gear 114 remains stationary. When the coil 112 is loaded with a first current, the bracket 111 drives the first gear 113 to move around the second gear 114 and mesh with it, causing the bracket 111 to rotate relative to the acoustic cavity wall 120 in a first direction. When the coil 112 is loaded with a second current, the bracket 111 drives the first gear 113 to move around the second gear 114 and mesh with it, causing the bracket 111 to rotate relative to the acoustic cavity wall 120 in a second direction.

[0044] Optionally, in some embodiments, the radial dimension of the first gear 113 is larger than the radial dimension of the second gear 114, such that the first gear 113 can be disposed around the outer periphery of the second gear 114 and mesh with the second gear 114. It is understood that the radial dimension of the first gear 113 refers to the length of the first gear 113 along the diametrical direction; the radial dimension of the second gear 114 refers to the length of the second gear 114 along the diametrical direction.

[0045] Understandably, if the radial dimension of the first gear 113 is greater than the radial dimension of the second gear 114, and the first gear 113 meshes with the second gear 114, then the number of teeth of the first gear 113 is greater than the number of teeth of the second gear 114.

[0046] In some embodiments, the bracket 111 is rotatable about a pivot relative to the acoustic cavity wall 120, and the first gear 113 is connected to the bracket 111. Along a cross section perpendicular to the pivot direction, the center of the first gear 113 coincides with the center of the bracket 111.

[0047] In the embodiments of this application, along a cross-section perpendicular to the axis of rotation, the center of the first gear 113 coincides with the center of the bracket 111, and the first gear 113 is connected to the bracket 111. When the first gear 113 rotates around the second gear 114, the first gear 113 can drive the bracket 111 to rotate around the second gear 114. Further, the bracket 111 rotates relative to the acoustic cavity wall 120, pushing the airflow in the first acoustic cavity 121, the second acoustic cavity 122, and the third acoustic cavity 123, thereby causing the airflow in the first radiation cavity 131, the second radiation cavity 132, and the third radiation cavity 133, driving the vibration of the first radiation sub-plate 134, the second radiation sub-plate 135, and the third radiation sub-plate 136.

[0048] In some embodiments, the bracket 111 can rotate about a pivot relative to the acoustic cavity wall 120. The cross-section of the bracket 111 along the direction perpendicular to the pivot is a Reichelk triangle. During the rotation of the bracket 111, the three corners of the Reichelk triangle abut against the inner wall of the acoustic cavity wall 120.

[0049] Understandably, in the embodiments of this application, the "Reuleaux triangle," also known as the "Ruleaux triangle," "circular arc triangle," and "Ruleaux triangle," is a special type of triangle. A Reuleaux triangle is a curvilinear triangle formed by three arcs, each centered at a vertex of an equilateral triangle and with its side length as the radius.

[0050] Optionally, the Reich triangle can rotate freely between two parallel lines that are equidistant from the sides of an equilateral triangle, and always remains in contact with the two parallel lines. In other words, the Reich triangle has the same width in any direction.

[0051] In an embodiment of this application, the bracket 111 is shaped like a Reichstag triangle along a cross section perpendicular to the axis of rotation, such that the bracket 111 has the same width in any direction. When the bracket 111 rotates relative to the acoustic cavity wall 120, the three corners of the bracket 111 can always abut against the inner wall of the acoustic cavity wall 120, making the first acoustic cavity 121, the second acoustic cavity 122, and the third acoustic cavity 123 independent of each other. As a result, the first radiating sub-plate 134 is only subjected to the vibration caused by the air flow in the first radiating cavity 131 and the first acoustic cavity 121, the second radiating sub-plate 135 is only subjected to the vibration caused by the air flow in the second radiating cavity 132 and the second acoustic cavity 122, and the third radiating sub-plate 136 is only subjected to the vibration caused by the air flow in the third radiating cavity 133 and the third acoustic cavity 123. Thus, the first radiating sub-plate 134, the second radiating sub-plate 135, and the third radiating sub-plate 136 can vibrate simultaneously without interfering with each other, which improves the low-frequency effect of the speaker 100 and improves the space utilization of the speaker 100, which is conducive to realizing the miniaturization design of the speaker 100.

[0052] Please see Figures 2 to 5Optionally, in some embodiments, the speaker 100 further includes a magnet 140, which is disposed opposite to the voice coil assembly 110. When a first current is applied to the coil 112, the magnetic poles generated by the portion of the coil 112 near the magnet 140 are the same as the magnetic poles of the portion of the magnet 140 near the coil 112, thereby driving the bracket 111 to rotate relative to the acoustic cavity wall 120 in a first direction. When a second current is applied to the coil 112, the magnetic poles generated by the portion of the coil 112 near the magnet 140 are opposite to the magnetic poles of the portion of the magnet 140 near the coil 112, thereby driving the bracket 111 to rotate relative to the acoustic cavity wall 120 in a second direction.

[0053] In embodiments of this application, the magnet 140 is disposed opposite to the voice coil assembly 110. The magnet 140 can form a constant magnetic field, which interacts with the alternating magnetic field provided by the coil 112 to drive the support 111 to rotate relative to the acoustic cavity wall 120. When a first current is applied to the coil 112, the magnetic poles generated by the portion of the coil 112 near the magnet 140 are the same as the magnetic poles of the portion of the magnet 140 near the coil 112. Therefore, the portion of the coil 112 near the magnet 140 repels the magnet 140, driving the support 111 to rotate relative to the acoustic cavity wall 120 in a first direction. When a second current is applied to the coil 112, the magnetic poles generated by the portion of the coil 112 near the magnet 140 are opposite to the magnetic poles of the portion of the magnet 140 near the coil 112. Therefore, the portion of the coil 112 near the magnet 140 attracts the magnet 140, driving the support 111 to rotate relative to the acoustic cavity wall 120 in a second direction.

[0054] Optionally, in some embodiments, the magnet 140 includes a first sub-magnet 141 and a second sub-magnet 142, which are spaced apart on opposite sides of the voice coil assembly 110.

[0055] In an embodiment of this application, the magnet 140 includes a first sub-magnet 141 and a second sub-magnet 142. The first sub-magnet 141 and the second sub-magnet 142 are spaced apart on opposite sides of the voice coil assembly 110, such that the constant magnetic field formed by the first sub-magnet 141 and the second sub-magnet 142 can interact with the alternating magnetic field provided by the coil 112 to drive the support 111 to rotate relative to the acoustic cavity wall 120.

[0056] Optionally, when the coil 112 is loaded with a first current, the magnetic poles generated by the portion of the coil 112 near the first sub-magnet 141 are the same as the magnetic poles of the portion of the first sub-magnet 141 near the coil 112, so as to drive the bracket 111 to rotate relative to the acoustic cavity wall 120 in a first direction; when the coil 112 is loaded with a second current, the magnetic poles generated by the portion of the coil 112 near the first sub-magnet 141 are opposite to the magnetic poles of the portion of the first sub-magnet 141 near the coil 112, so as to drive the bracket 111 to rotate relative to the acoustic cavity wall 120 in a second direction.

[0057] In the embodiments of this application, the first sub-magnet 141 and the second sub-magnet 142 are spaced apart on opposite sides of the voice coil assembly 110. When the coil 112 is loaded with a first current, the magnetic pole generated by the portion of the coil 112 near the first sub-magnet 141 is the same as the magnetic pole of the portion of the first sub-magnet 141 near the coil 112. The magnetic pole generated by the portion of the coil 112 near the second sub-magnet 142 is also the same as the magnetic pole of the portion of the second sub-magnet 142 near the coil 112. Therefore, the portion of the coil 112 near the first sub-magnet 141 repels the first sub-magnet 141, and the portion of the coil 112 near the second sub-magnet 142 repels the second sub-magnet 142, thereby driving the bracket 111 to rotate relative to the acoustic cavity wall 120 in a first direction. When the coil 112 is loaded with a second current, the magnetic poles generated by the portion of the coil 112 near the first sub-magnet 141 are opposite to the magnetic poles of the portion of the first sub-magnet 141 near the coil 112, and the magnetic poles generated by the portion of the coil 112 near the second sub-magnet 142 are also opposite to the magnetic poles of the portion of the second sub-magnet 142 near the coil 112. In this case, the portion of the coil 112 near the first sub-magnet 141 attracts the first sub-magnet 141, and the portion of the coil 112 near the second sub-magnet 142 attracts the second sub-magnet 142, thereby driving the bracket 111 to rotate relative to the acoustic cavity wall 120 in a second direction.

[0058] Optionally, in some embodiments, the magnetic pole of the portion of the first sub-magnet 141 near the coil 112 is south-polarized, and the magnetic pole of the portion of the second sub-magnet 142 near the coil 112 is north-polarized. In other embodiments, the magnetic pole of the portion of the first sub-magnet 141 near the coil 112 is north-polarized, and the magnetic pole of the portion of the second sub-magnet 142 near the coil 112 is south-polarized.

[0059] Optionally, in some embodiments, the voice coil assembly 110 includes a bracket 111 and a coil 112, the coil 112 being disposed on the bracket 111 and located within the magnetic field range generated by the first sub-magnet 141 and the second sub-magnet 142.

[0060] In the embodiments of this application, the coil 112 is located within the magnetic field range generated by the first sub-magnet 141 and the second sub-magnet 142, such that when the coil 112 is loaded with a first current, the magnetic pole generated by the portion of the coil 112 near the first sub-magnet 141 is the same as the magnetic pole of the portion of the first sub-magnet 141 near the coil 112, and the magnetic pole generated by the portion of the coil 112 near the second sub-magnet 142 is also the same as the magnetic pole of the portion of the second sub-magnet 142 near the coil 112. Therefore, the portion of the coil 112 near the first sub-magnet 141 repels the first sub-magnet 141, and the portion of the coil 112 near the second sub-magnet 142 repels the second sub-magnet 142, thereby driving the bracket 111 to rotate relative to the acoustic cavity wall 120 in a first direction. When the coil 112 is loaded with a second current, the magnetic poles generated by the portion of the coil 112 near the first sub-magnet 141 are opposite to the magnetic poles of the portion of the first sub-magnet 141 near the coil 112, and the magnetic poles generated by the portion of the coil 112 near the second sub-magnet 142 are also opposite to the magnetic poles of the portion of the second sub-magnet 142 near the coil 112. In this case, the portion of the coil 112 near the first sub-magnet 141 attracts the first sub-magnet 141, and the portion of the coil 112 near the second sub-magnet 142 attracts the second sub-magnet 142, thereby driving the bracket 111 to rotate relative to the acoustic cavity wall 120 in a second direction.

[0061] In some embodiments, when the voice coil assembly 110 rotates relative to the cavity wall 120, the sum of the volumes of the first cavity 121, the second cavity 122, and the third cavity 123 remains unchanged.

[0062] When the voice coil assembly 110 rotates relative to the cavity wall 120, the space enclosed by the first cavity 121 and the first radiating cavity 131 is a closed and independent space, the space enclosed by the second cavity 122 and the second radiating cavity 132 is a closed and independent space, and the space enclosed by the third cavity 123 and the third radiating cavity 133 is a closed and independent space. Since the volumes of the first radiating cavity 131, the second radiating cavity 132, and the third radiating cavity 133 remain unchanged, the sum of the volumes of the first cavity 121, the second cavity 122, and the third cavity 123 remains unchanged. In the embodiments of this application, if the sum of the volumes of the first acoustic cavity 121, the second acoustic cavity 122, and the third acoustic cavity 123 remains constant, then when the voice coil assembly 110 rotates relative to the acoustic cavity wall 120, one or both of the volumes of the first acoustic cavity 121, the second acoustic cavity 122, and the third acoustic cavity 123 will increase, and one or both of the volumes of the first acoustic cavity 121, the second acoustic cavity 122, and the third acoustic cavity 123 will decrease, thereby promoting the flow of air in the first radiation cavity 131, the second radiation cavity 132, and the third radiation cavity 133, so as to drive the vibration of the first radiation subplate 134, the second radiation subplate 135, and the third radiation subplate 136.

[0063] In some embodiments, when the bracket 111 rotates about the pivot relative to the acoustic cavity wall 120, the position of the second gear 114 remains fixed and does not rotate. The bracket 111 performs an eccentric motion about the second gear 114, and while performing the eccentric motion, the bracket 111 rotates about its center, so that the first gear 113 meshes with the second gear 114, causing the bracket 111 to rotate about the second gear 114 relative to the acoustic cavity wall 120.

[0064] Understandably, the eccentric movement of the bracket 111 around the second gear 114 means that the bracket 111 always abuts against the second gear 114, and the first gear 113 of the bracket 111 meshes with the second gear 114 to realize the rotation of the bracket 111 around the second gear 114.

[0065] In the embodiments of this application, the position of the second gear 114 is fixed and does not rotate. While the bracket 111 performs an eccentric movement around the second gear 114, the bracket 111 also rotates around its center. This causes the first gear 113 to rotate on its own axis while rotating around the second gear 114, thereby achieving meshing between the first gear 113 and the second gear 114. The first gear 113 is connected to the bracket 111 and sleeved on the outer periphery of the second gear 114. When the first gear 113 rotates on its own axis while rotating around the second gear 114, the bracket 111 rotates relative to the acoustic cavity wall 120 around the second gear 114. Furthermore, the bracket 111 rotates relative to the acoustic cavity wall 120, pushing the air flow in the first acoustic cavity 121, the second acoustic cavity 122 and the third acoustic cavity 123, thereby causing the air flow in the first radiation cavity 131, the second radiation cavity 132 and the third radiation cavity 133, driving the vibration of the first radiation sub-plate 134, the second radiation sub-plate 135 and the third radiation sub-plate 136.

[0066] Please see Figure 6 This application also provides an audio system 200, which includes a speaker 100, an audio source system 210, and a power amplifier 220. The audio source system 210 is electrically connected to the speaker 100 and provides an audio signal to the speaker 100. The power amplifier 220 is electrically connected to both the audio source system 210 and the speaker 100 and is used to amplify the audio signal provided by the audio source system 210.

[0067] In the embodiments of this application, the audio source system 210, the power amplifier 220, and the speaker 100 are electrically connected in pairs. The audio source system 210 serves as the audio source of the audio system 200, providing audio signals to the speaker 100. The power amplifier 220 amplifies the audio signals provided by the audio source system 210, enabling the speaker 100 to convert the audio signals into corresponding sound signals and radiate them into space for direct listening. The speaker 100 provided in this application has a good low-frequency enhancement effect, resulting in an ideal audio effect for the audio system 200. Furthermore, the speaker 100 of this application has a high space utilization rate and achieves a miniaturized design, which in turn facilitates the miniaturization of the audio system 200.

[0068] In this application, the terms "embodiment" and "implementation" mean that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of these phrases in various locations throughout the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art will understand, explicitly and implicitly, that the embodiments described in this application can be combined with other embodiments. Furthermore, it should be understood that the features, structures, or characteristics described in the various embodiments of this application can be arbitrarily combined to form yet another embodiment that does not depart from the spirit and scope of the technical solution of this application, provided there is no contradiction between them.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A sound box, characterized in that, The speaker includes: Voice coil assembly; A cavity wall surrounds the outer periphery of the voice coil assembly, and the voice coil assembly and the cavity wall together form independent first, second, and third sound cavities. The voice coil assembly is rotatable relative to the cavity wall to change the volume of the first, second, and third sound cavities. A radiating plate is arranged around the outer periphery of the acoustic cavity wall and together with the acoustic cavity wall, forms an independent first radiating cavity, a second radiating cavity, and a third radiating cavity. The first radiating cavity is connected to the first acoustic cavity, the second radiating cavity is connected to the second acoustic cavity, and the third radiating cavity is connected to the third acoustic cavity. When the voice coil assembly rotates relative to the cavity wall, the volumes of the first cavity, the second cavity, and the third cavity all change, thereby compressing the air inside the first cavity, the second cavity, and the third cavity, and transmitting it to the radiating plate through the first radiating cavity, the second radiating cavity, and the third radiating cavity, causing the radiating plate to vibrate; The voice coil assembly includes a support and a coil. The support and the acoustic cavity wall form independent first, second, and third acoustic cavities. The voice coil assembly also includes a first gear and a second gear. The first gear is sleeved on the outer periphery of the second gear and meshes with the second gear. Along a cross-section parallel to the plane of rotation, the center of the first gear coincides with the center of the support, and the first gear is connected to the support. The position of the second gear remains fixed. When a first current is applied to the coil, the first gear can drive the support to rotate around the second gear relative to the acoustic cavity wall in a first direction. When a second current is applied to the coil, the first gear can drive the support to rotate around the second gear relative to the acoustic cavity wall in a second direction. The direction of the first current is opposite to the direction of the second current, and the first direction is opposite to the second direction. The cross-section of the bracket on the rotation plane is a Reilly triangle. During the rotation of the bracket, the three corners of the Reilly triangle abut against the inner wall of the acoustic cavity. The rotation plane is the plane in which the first gear rotates around the second gear.

2. The speaker according to claim 1, characterized in that, The radiating plate includes a first radiating sub-plate, a second radiating sub-plate, and a third radiating sub-plate connected in sequence, wherein the first radiating sub-plate and the acoustic cavity wall form a first radiating cavity; The second radiating sub-plate and the acoustic cavity wall together form a second radiating cavity; The third radiating sub-plate and the acoustic cavity wall together form a third radiating cavity.

3. The speaker according to claim 1, characterized in that, The coil is mounted on the bracket.

4. The speaker according to claim 1, characterized in that, The speaker also includes a magnet, which is disposed opposite to the voice coil assembly. When a first current is applied to the coil, the magnetic poles generated by the portion of the coil near the magnet are the same as the magnetic poles of the portion of the magnet near the coil, thereby driving the bracket to rotate relative to the acoustic cavity wall in a first direction. When a second current is applied to the coil, the magnetic poles generated by the portion of the coil near the magnet are opposite to the magnetic poles of the portion of the magnet near the coil, thereby driving the bracket to rotate relative to the acoustic cavity wall in a second direction.

5. The speaker according to claim 4, characterized in that, The magnet includes a first sub-magnet and a second sub-magnet, which are spaced apart on opposite sides of the voice coil assembly.

6. The speaker according to claim 5, characterized in that, The voice coil assembly includes a bracket and a coil, the coil being disposed on the bracket and located within the magnetic field range generated by the first sub-magnet and the second sub-magnet.

7. The speaker according to claim 1, characterized in that, When the voice coil assembly rotates relative to the cavity wall, the sum of the volumes of the first cavity, the second cavity, and the third cavity remains unchanged.

8. A sound system, characterized in that, The audio system includes: The speaker according to any one of claims 1 to 7; A sound source system, which is electrically connected to the speaker and provides audio signals to the speaker; A power amplifier, which is electrically connected to both the audio source system and the speaker, is used to amplify the audio signal provided by the audio source system.

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