Loudspeaker and electronic device

Abstract

The present application relates to a loudspeaker and an electronic device. The loudspeaker comprises a voice coil, a diaphragm, an annular first magnetic circuit array, and an annular second magnetic circuit array, wherein the diaphragm is fixedly connected to the voice coil, and the voice coil comprises a first side and a second side which are oppositely arranged. The first magnetic circuit array comprises a first cavity, the first cavity is used for accommodating the first side, the second magnetic circuit array comprises a second cavity, the second cavity is used for accommodating the second side, a magnetic field of the first magnetic circuit array and a magnetic field of the second magnetic circuit array are used for enabling the energized voice coil to drive the diaphragm to move in a first direction, two side portions of the first magnetic circuit array spaced apart in a second direction and two side portions of the second magnetic circuit array spaced apart in the second direction are magnetic members, and the second direction forms an angle with the first direction. A magnetic circuit apparatus in embodiments of the present application can effectively reduce attenuation of the driving force on the voice coil at large amplitudes.

Description

Speakers and electronic devices

[0001] This application claims priority to Chinese Patent Application No. 202510121257.0, filed on January 23, 2025, entitled "Speaker and Electronic Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of audio technology, and more particularly to a loudspeaker and electronic device. Background Technology

[0003] Electronic devices such as mobile phones, computers, and smartwatches typically have speakers, which are transducers that convert electrical signals into sound signals. However, the magnetic circuitry of existing speakers causes the driving force on the voice coil to attenuate significantly at large amplitudes. Summary of the Invention

[0004] This application provides a loudspeaker and an electronic device. The loudspeaker of this application can effectively reduce the attenuation of the driving force of the voice coil under large amplitude.

[0005] In a first aspect, embodiments of this application provide a loudspeaker. The loudspeaker includes a voice coil, a diaphragm, a first annular magnetic circuit array, and a second annular magnetic circuit array. The diaphragm is fixedly connected to the voice coil. The voice coil includes a first side and a second side disposed opposite to each other. The first magnetic circuit array includes a first cavity for accommodating the first side, and the second magnetic circuit array includes a second cavity for accommodating the second side. The magnetic fields of the first and second magnetic circuit arrays are used to cause the energized voice coil to drive the diaphragm to move along a first direction. The two side portions of the first and second magnetic circuit arrays arranged at intervals in a second direction are both magnetic elements. The second direction is arranged at an angle to the first direction.

[0006] In this embodiment, the first side of the voice coil is located in the first cavity of the annular first magnetic circuit array, and the second side of the voice coil is located in the second cavity of the annular second magnetic circuit array. The voice coil moves within the first cavity and the second cavity. The voice coil is constrained in the magnetic circuit device (which may include the first magnetic circuit array and the second magnetic circuit array). The annular first magnetic circuit array and the annular second magnetic circuit array can limit the movement of the voice coil, preventing it from jumping out of the magnetic circuit device during its movement along the first direction, thus avoiding performance loss and distortion problems of the loudspeaker. In this embodiment, both the two sides of the first magnetic circuit array arranged at intervals in the second direction and the two sides of the second magnetic circuit array arranged at intervals in the second direction are magnetic components. The two sides of the first magnetic circuit array arranged at intervals in the second direction form a ring with the two sides of the second magnetic circuit array arranged at intervals in the first direction. The two sides of the second magnetic circuit array arranged at intervals in the second direction form a ring with the two sides of the second magnetic circuit array arranged at intervals in the first direction. This makes the magnetic field distribution of the magnetic circuit device more uniform, which can effectively reduce the attenuation of the driving force of the voice coil under large amplitude, realize the nonlinear improvement of the driving force, reduce the distortion of the loudspeaker under large amplitude, and help improve the low-frequency driving capability of the loudspeaker.

[0007] In one possible implementation, the first magnetic circuit array includes a first side and a second side spaced apart along the second direction, and the second magnetic circuit array includes a third side and a fourth side spaced apart along the second direction. The first side, the first edge, the second side, the third side, the second edge, and the fourth side are arranged sequentially along the second direction. The magnetic pole arrangement direction of the first side is mirror-symmetrical to that of the fourth side, and the magnetic pole arrangement direction of the second side is mirror-symmetrical to that of the third side. By setting the magnetic pole arrangement direction of the first side to be mirror-symmetrical to that of the fourth side, and the magnetic pole arrangement direction of the second side to be mirror-symmetrical to that of the third side, it is beneficial to ensure that the first and second sides of the voice coil are driven by the same direction, which is beneficial to the reciprocating motion of the voice coil along the first direction.

[0008] In one possible implementation, the magnetic components of the first side, the second side, the third side, and the fourth side each include at least two magnetic blocks, which is beneficial for improving the performance of the speaker.

[0009] In one possible implementation, the magnetic poles of the two outermost magnetic blocks of at least one of the first side, the second side, the third side, and the fourth side are arranged in opposite directions in the first direction. This is beneficial for the first and second sides of the voice coil to be driven by the same direction, which is beneficial for the voice coil to reciprocate along the first direction.

[0010] In one possible implementation, the first magnetic circuit array includes a fifth side and a sixth side arranged along the first direction. The first side, the fifth side, the second side, and the sixth side are arranged in a ring shape. The fifth side is a magnetic plate, and / or the sixth side is a magnetic plate. During manufacturing, the minimum thickness of the magnetic plate that can be manufactured is much smaller than the minimum thickness of the magnetic component that can be manufactured. By setting the fifth side and / or the sixth side as magnetic plates, the size of the magnetic circuit device in the first direction can be significantly reduced. Since the fifth and sixth sides have a small impact on the magnetic field strength of the magnetic circuit device, setting the fifth and / or the sixth side as magnetic plates has little effect on the magnetic field strength of the magnetic circuit device, resulting in less loss of driving force on the voice coil in the magnetic field of the magnetic circuit device, ensuring that the voice coil receives sufficient driving force. Because the fifth and sixth sides have a small impact on the magnetic circuit device, setting the fifth and / or the sixth side as magnetic plates does not significantly change the magnetic field strength in the area where the voice coil is located, and the magnetic field distribution of the magnetic circuit device remains relatively uniform. Furthermore, since the strength of the magnetic component is less than that of the magnetic plate, the magnetic component is easily damaged during a drop, causing it to break. By setting the fifth and / or sixth sides as magnetic plates, the structural strength of the magnetic circuit device can be increased, thereby increasing the structural stability of the speaker.

[0011] In one possible implementation, the second side portion includes a first magnetic block, and the third side portion includes a second magnetic block. The first and second magnetic blocks are arranged along the second direction, and the magnetic pole arrangement direction of the first magnetic block is the same as that of the second magnetic block. The first and second magnetic blocks are connected as a single unit. This embodiment simplifies the architecture of the magnetic circuit device by connecting the first and second magnetic blocks as a single unit, which is beneficial for engineering. The absence of gaps between the first and second magnetic blocks increases the overall volume of the magnetic block, thereby increasing the magnetic field strength of the magnetic circuit device and thus increasing the driving force on the voice coil. Alternatively, connecting the first and second magnetic blocks as a single unit and reducing the size of the magnetic circuit device in the second direction can also ensure that the magnetic field strength of the magnetic circuit device meets the requirements and facilitates miniaturization of the magnetic circuit device.

[0012] In one possible implementation, the second side portion includes a third magnetic block and a fourth magnetic block, which are arranged along the second direction. The magnetic poles of the third magnetic block are arranged in the opposite direction to those of the fourth magnetic block, and the third and fourth magnetic blocks are spaced apart. Since the magnetic poles of the third and fourth magnetic blocks are arranged in the opposite direction, the sides of the third and fourth magnetic blocks that are close to each other contain the same type of magnetic poles. Since like poles repel each other, it is necessary to space the third and fourth magnetic blocks apart to avoid mutual repulsion when they are close together, thus ensuring the structural stability of the magnetic circuit device.

[0013] In one possible implementation, the loudspeaker includes an antimagnetic component located between the third and fourth magnetic blocks. The antimagnetic component can be made of antimagnetic materials such as copper, graphite, or alumina. By incorporating the antimagnetic component, the gap between the third and fourth magnetic blocks can be reduced, which helps ensure the miniaturization of the loudspeaker and avoids instability in the magnetic circuit caused by the repulsion between the third and fourth magnetic blocks.

[0014] In one possible implementation, the first magnetic circuit array includes a fifth side portion connecting the first side portion and the second side portion. The second magnetic circuit array includes a seventh side portion connecting the third side portion and the fourth side portion. The fifth side portion and the seventh side portion are located on the same side of the magnetic circuit device and are both magnetically conductive plates. The fifth side portion and the seventh side portion are connected as a single integrated structure. By setting the fifth side portion and the seventh side portion to be connected as a single integrated structure, the structure of the magnetic circuit device is simplified, and the structural stability of the magnetic circuit device is increased.

[0015] In one possible implementation, the first magnetic circuit array includes a fifth side and a sixth side arranged along the first direction. The first side, the fifth side, the second side, and the sixth side are arranged in a ring. The fifth side includes a fifth magnetic block and a sixth magnetic block. The angle between the magnetic pole arrangement direction of the fifth magnetic block and the magnetic pole arrangement direction of the sixth magnetic block is greater than 0° and less than 90°. By configuring the fifth side to include at least two magnetic blocks, this embodiment of the application can effectively reduce magnetic leakage, increase the magnetic field strength within the first cavity of the first magnetic circuit array, increase the driving force on the voice coil in the magnetic circuit device, and improve speaker performance.

[0016] In one possible implementation, the first side portion includes a first segment and a second segment arranged along a second direction. The first magnetic circuit array includes a fifth side portion, which connects the first side portion and the second side portion. One end of the fifth side portion is stacked with the second segment and offset from the first segment. Understandably, the fifth side portion does not stack with the first segment and does not cover the first segment. When the magnetic circuit device is applied to a loudspeaker, the fifth side portion is fixedly connected to the diaphragm. By setting one end of the fifth side portion to stack with the second segment but not with the first segment, the area of ​​the diaphragm's vibration region can be increased, which is beneficial for improving the loudspeaker's performance.

[0017] In one possible implementation, the magnetic circuit device includes a third magnetic circuit array and a fourth magnetic circuit array, both of which are ring-shaped and arranged opposite to each other. The third magnetic circuit array includes a third cavity for accommodating the third side of the voice coil, and the fourth magnetic circuit array includes a fourth cavity for accommodating the fourth side of the voice coil. By arranging the third and fourth magnetic circuit arrays, all four sides of the voice coil are located within the magnetic circuit device, improving the utilization rate of the voice coil, which is beneficial for increasing the driving force on the voice coil and improving the performance of the loudspeaker.

[0018] In one possible implementation, both the first magnetic circuit array and the second magnetic circuit array are Heilbeck arrays, which helps to concentrate the magnetic field lines of the first magnetic circuit array in the first cavity and the magnetic field lines of the second magnetic circuit array in the second cavity, reducing magnetic leakage to the outside of the magnetic circuit device and providing sufficient driving force for the voice coil.

[0019] In one possible implementation, a portion of the first magnetic circuit array and a portion of the second magnetic circuit array are embedded in the diaphragm, which is beneficial for miniaturization of the loudspeaker.

[0020] In one possible implementation, the loudspeaker includes a dome, which comprises a first plate and a third plate extending in different directions. The first plate is fixed to the side of the diaphragm facing the voice coil, and the voice coil is fixedly connected to the third plate. The first plate has high structural strength, which helps to increase the structural strength of the diaphragm. By setting the third plate, the connection between the diaphragm and the voice coil is rationally arranged, which helps to improve the reliability of the connection between the diaphragm and the voice coil.

[0021] In one possible implementation, the dome includes a second plate whose extension direction differs from that of the first plate, and the second plate is closer to the edge of the first plate relative to the third plate. The loudspeaker includes a frame and a diaphragm, the edge of the diaphragm is fixed to the frame, and the diaphragm is fixedly connected to the frame and the second plate. This embodiment of the application, by providing a diaphragm, helps to balance the tilt and sway of the diaphragm, improves the stability of diaphragm vibration, and thus improves the performance of the loudspeaker.

[0022] Secondly, this application provides an electronic device, including a processor and a speaker as described in any of the above embodiments, wherein the speaker is electrically connected to the processor. The electronic device can be a mobile phone, laptop computer, tablet computer, smart glasses, in-vehicle equipment, or other product that requires sound output, and the processor is used to control the speaker to output sound. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0024] Figure 1 is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0025] Figure 2 is a structural schematic diagram of a loudspeaker shown in Figure 1;

[0026] Figure 3 is an exploded view of the loudspeaker shown in Figure 2;

[0027] Figure 4 is a schematic diagram of the loudspeaker shown in Figure 2 with a portion cut off at point AA;

[0028] Figure 5 is a schematic diagram of the speaker shown in Figure 2 with a portion cut off at BB.

[0029] Figure 6 is a schematic diagram of the voice coil and magnetic circuit of the loudspeaker shown in Figure 3;

[0030] Figure 7 is a schematic diagram of the magnetic circuit device shown in Figure 6;

[0031] Figure 8 is a cross-sectional view of the voice coil and magnetic circuit device shown in Figure 6 at CC;

[0032] Figure 9A is a simulation diagram of the magnetic field of the magnetic circuit device shown in Figure 8;

[0033] Figure 9B is a schematic diagram showing the relationship between the driving force and amplitude of the voice coil;

[0034] Figure 10 is a schematic diagram of the voice coil and magnetic circuit device of another type of loudspeaker shown in Figure 1;

[0035] Figure 11 is a schematic diagram of the voice coil and magnetic circuit device of another type of loudspeaker shown in Figure 1;

[0036] Figure 12A is a cross-sectional view of the voice coil and magnetic circuit device shown in Figure 11 at DD;

[0037] Figure 12B is a schematic diagram of the voice coil 21 and magnetic circuit device 22 of another type of loudspeaker shown in Figure 1;

[0038] Figure 13 is a schematic diagram of the voice coil and magnetic circuit device of another type of loudspeaker shown in Figure 1;

[0039] Figure 14 is a cross-sectional view of the voice coil and magnetic circuit device shown in Figure 13 at EE;

[0040] Figure 15 is a schematic diagram of the voice coil and magnetic circuit device of another type of loudspeaker shown in Figure 1;

[0041] Figure 16 is a cross-sectional view of the voice coil and magnetic circuit device shown in Figure 15 at FF;

[0042] Figure 17 is a schematic diagram of the voice coil and magnetic circuit device of another type of loudspeaker shown in Figure 1. Detailed Implementation

[0043] 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 skilled in the art without creative effort are within the scope of protection of this application.

[0044] It should be understood that the terms "first," "second," etc., used in this application are for distinguishing purposes only and should not be construed as indicating or implying relative importance or order.

[0045] In the description of this application, the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, a mating connection, or an integral connection; those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] Figure 1 is a schematic diagram of the structure of an electronic device 100. The electronic device 100 can be a mobile phone, laptop computer, tablet computer, smart glasses, vehicle equipment, etc. In the embodiments of this application, a mobile phone is used as an example for description.

[0048] Electronic device 100 may include processor 10 and speaker 20, with processor 10 electrically connected to speaker 20. Processor 10 may be a central processing unit, or other general-purpose processors, digital signal processors, etc. Processor 10 is the control center of electronic device 100, connecting various parts of electronic device 100 through various interfaces and lines. Processor 10 can control speaker 20 to play sound, enabling speaker 20 to produce different sound effects in different scenarios. Furthermore, the crossover function integrated in processor 10 can provide corresponding adjustments based on the different frequency information of speaker 20 under different operating states, resulting in clear and harmonious sound layers and good sound quality in the high, mid, and low frequencies.

[0049] The electronic device 100 may also include a front-facing camera 110 and a battery 120. The front-facing camera 110 is used to capture pictures or videos, fulfilling the shooting needs of the electronic device 100. The battery 120 is located inside the electronic device 100 and is used to power the electronic device 100. The battery 120 is generally large in size, occupying a large amount of internal space in the electronic device 100. The battery 120 can be a rectangle as shown in Figure 1, or it can be circular, square, or an irregular shape. This application embodiment does not specifically limit the shape and position of the battery 120.

[0050] The processor 10 can be electrically connected to the battery 120, and the processor 10 can realize functions such as charging, discharging, and power consumption management of the battery 120 through the power management system. The processor 10 can also be electrically connected to the front-facing camera 110, and the processor 10 can receive shooting commands to control the front-facing camera 110 to take pictures and videos to realize the functions of taking pictures and videos.

[0051] In some embodiments, the electronic device 100 includes a rear-facing camera (not shown in FIG1) for capturing pictures or videos. The electronic device 100 may also include a power button, volume buttons, a headphone jack, etc.

[0052] The positions and dimensions of the processor 10, speaker 20, front-facing camera 110, and battery 120 in Figure 1 are merely schematic representations and can be adjusted as needed. Furthermore, Figure 1 is only a schematic diagram of the structure of an electronic device 100, and the embodiments of this application do not limit the structure of the electronic device 100.

[0053] As shown in Figures 2, 3, 4 and 5, Figure 2 is a structural schematic diagram of a loudspeaker 20 shown in Figure 1, Figure 3 is an exploded structural schematic diagram of the loudspeaker 20 shown in Figure 2, Figure 4 is a structural schematic diagram of the loudspeaker 20 shown in Figure 2 with a portion cut off at point AA, and Figure 5 is a structural schematic diagram of the loudspeaker 20 shown in Figure 2 with a portion cut off at point BB.

[0054] The loudspeaker 20 may include a voice coil 21 and a magnetic circuit device 22. The magnetic circuit device 22 generates a magnetic field, and the voice coil 21 is located in the magnetic field of the magnetic circuit device 22. The voice coil 21 may be made of wire. The voice coil 21 may be wound into a ring structure; for example, the voice coil 21 may be a square ring, a circular ring, or the like. When the voice coil 21 is a square ring, it may be a square ring structure or a rectangular ring structure. The voice coil 21 may include a first side 211 and a second side 212 arranged opposite each other, and the voice coil 21 may also include a third side 213 and a fourth side 214 arranged opposite each other. The first side 211, the third side 213, the second side 212, and the fourth side 214 are connected in sequence and surround to form a ring structure.

[0055] The loudspeaker 20 may also include a diaphragm 23, which is fixedly connected to a voice coil 21. Understandably, the diaphragm 23 may contact and be fixedly connected to the voice coil 21, or it may be fixedly connected to the voice coil 21 via other structural components (such as a dome). The voice coil 21 is used to drive the diaphragm 23 to move when energized. For example, when current flows through the voice coil 21, it cuts the magnetic field lines of the magnetic circuit device 22, causing the diaphragm 23 to reciprocate. That is, the voice coil 21 is used to drive the diaphragm 23 to reciprocate within the magnetic field of the magnetic circuit device 22. During the vibration of the diaphragm 23, it resonates with the surrounding air to produce sound, thereby converting the electrical signal into an acoustic signal.

[0056] The diaphragm 23 may include a first portion 231, a second portion 232, and a third portion 233. The third portion 233 surrounds the first portion 231, and the second portion 232 connects the first portion 231 and the third portion 233. The first portion 231 protrudes away from the voice coil 21 relative to the second portion 232, and the third portion 233 protrudes closer to the voice coil 21 relative to the second portion 232.

[0057] The first part 231 may include a first region 2311 and a second region 2312, with the second region 2312 surrounding the first region 2311. The first region 2311 can be fixedly connected to the magnetic circuit device 22 and does not vibrate. A gap exists between the second region 2312 and the magnetic circuit device 22, and the second region 2312 can vibrate and produce sound. Understandably, the first region 2311 can be fixedly connected to the magnetic circuit device 22 by means of adhesive or similar methods. This application, by providing the first part 231 and the third part 233, facilitates the stable vibration of the diaphragm 23.

[0058] Understandably, the first part 231, the second part 232, and the third part 233 can be a single-piece structure or a separate structure assembled and fixed to form a single-piece structure. The diaphragm 23 can also be other structures. This application embodiment does not limit the specific structure of the diaphragm 23, and it can be set as needed.

[0059] The loudspeaker 20 may also include a frame 24, a dome 25, a reinforcing member 26, a diaphragm 27, and a flexible circuit board 28. The frame 24 can be the housing structure of the loudspeaker 20, and the outer edge of the third portion 233 of the diaphragm 23 can be fixed to the frame 24. Understandably, the third portion 233 of the diaphragm 23 can be fixed to the frame 24 by means of adhesive or other methods.

[0060] The dome 25 can be fixed to the side of the diaphragm 23 facing the voice coil 21, or it can be fixed to the side of the diaphragm 23 away from the voice coil 21. The dome 25 has high structural strength and can be used to support the diaphragm 23 and increase its structural strength. The dome 25 may include a first plate 251, a second plate 252, and a third plate 253. The first plate 251 and the second plate 252 extend in different directions, and the first plate 251 and the third plate 253 extend in different directions. The first plate 251 is fixedly connected to the diaphragm 23. The second plate 252 and the third plate 253 are spaced apart, and there can be two of each. The two second plates 252 can be distributed on opposite sides of the first plate 251, and the two third plates 253 can be distributed on opposite sides of the first plate 251. On the same side of the first plate 251, the second plate 252 is closer to the outer edge of the first plate 251 than the third plate 253. The voice coil 21 can be fixedly connected to the third plate 253. Movement of the voice coil 21 drives movement of the dome 25, which in turn drives movement of the diaphragm 23, thus achieving the effect of the voice coil 21 driving the diaphragm 23. The first plate 251, the second plate 252, and the third plate 253 can be a single-piece structure or separate structures assembled and fixed to form a single-piece structure. In other embodiments, the dome 25 may not include the second plate 252.

[0061] The reinforcing member 26 can be fixed to the first plate 251 of the dome 25. The reinforcing member 26 has high structural strength and can be used to increase the structural strength of the dome 25.

[0062] One side of the small diaphragm 27 is connected to the frame 24, and the other side of the small diaphragm 27 is connected to the second plate 252 of the dome 25. The small diaphragm 27 has low structural strength and is flexible. Due to processing errors, the diaphragm 23 has an uneven structure, which may cause the forces on both sides of the diaphragm 23 to be different during vibration. This can cause the diaphragm 23 to tilt and sway, and consequently, the dome 25 to tilt and sway. In this embodiment, by setting the small diaphragm 27, it is beneficial to balance the tilt and sway of the diaphragm 23, improve the vibration stability of the diaphragm 23, and thus improve the performance of the speaker 20.

[0063] The flexible circuit board 28 is electrically connected to and supplies power to the voice coil 21, enabling the voice coil 21 to vibrate in the magnetic field of the magnetic circuit device 22 when energized. Exemplarily, the flexible circuit board 28 has pads to which the voice coil 21 is electrically connected. The flexible circuit board 28 can be located at the four corners or two sides of the speaker 20. One end of the flexible circuit board 28 is connected to the voice coil 21, and the other end is connected to the frame 24. The flexible circuit board 28 can be located on the side of the voice coil 21 furthest from the diaphragm 23, or on the side of the voice coil 21 closer to the diaphragm 23. Understandably, the flexible circuit board can also be replaced with part of the voice coil lead wire, that is, the lead wire of the voice coil is led out to the frame and electrically connected to the outside.

[0064] The loudspeaker 20 may also include a frame that can be connected between the voice coil 21 and the diaphragm 23 or between the voice coil 21 and the dome 25 to support the voice coil 21.

[0065] Referring to Figure 4, the magnetic circuit device 22 can be located in the middle region of the loudspeaker 20. A portion of the magnetic circuit device 22 can be embedded in the first portion 231 of the diaphragm 23. Exemplarily, the magnetic circuit device 22 can be embedded in the dome 25 and the first portion 231 of the diaphragm 23, achieving a compact arrangement of the magnetic circuit device 22, the dome 25, and the diaphragm 23. This helps to reduce the size of the loudspeaker 20 in the first direction X (the first direction X is the direction of movement of the voice coil 21), achieving a miniaturized design of the loudspeaker 20 and reducing the space occupied by the loudspeaker 20 in the electronic device 100.

[0066] As shown in Figures 6, 7, and 8, Figure 6 is a structural schematic diagram of the voice coil 21 and magnetic circuit device 22 of the loudspeaker 20 shown in Figure 3; Figure 7 is a structural schematic diagram of the magnetic circuit device 22 shown in Figure 6; and Figure 8 is a cross-sectional view of the voice coil 21 and magnetic circuit device 22 shown in Figure 6 at point C. To show the magnetization direction of the magnetic circuit device 22 in Figure 8, the cross-sectional lines are not shown. The first direction X is the direction of movement of the voice coil 21, and the second direction Y is set at an angle to the first direction X. For example, the second direction Y can be perpendicular to the first direction X. The first side 211 and the second side 212 of the voice coil 21 are arranged along the second direction Y.

[0067] The magnetic circuit device 22 may include a ring-shaped first magnetic circuit array 221 and a ring-shaped second magnetic circuit array 222. The first magnetic circuit array 221 can be a square ring, circular ring, or other ring-shaped structure; that is, the cross-section of the first magnetic circuit array 221 along the CC direction is a square ring or a circular ring. When the first magnetic circuit array 221 is a square ring, it can be a square ring structure or a rectangular ring structure. The second magnetic circuit array 222 can also be a square ring, circular ring, or other ring-shaped structure; that is, the cross-section of the second magnetic circuit array 222 along the CC direction is a square ring or a circular ring. When the second magnetic circuit array 222 is a square ring, it can be a square ring structure or a rectangular ring structure.

[0068] The first magnetic circuit array 221 may include a first side portion 2211 and a second side portion 2212 arranged opposite to each other and spaced apart along the second direction Y, and a fifth side portion 2213 and a sixth side portion 2214 arranged opposite to each other and spaced apart along the first direction X. The first side portion 2211, the fifth side portion 2213, the second side portion 2212 and the sixth side portion 2214 are sequentially connected to form a ring structure and surround a first cavity 2215. It can be understood that the first side portion 2211 and the second side portion 2212 are two sides of the first magnetic circuit array 221 arranged spaced apart along the second direction Y, and both the first side portion 2211 and the second side portion 2212 are magnetic elements with magnetic poles. In other words, the first side portion 2211 and the second side portion 2212 do not have magnetic plates.

[0069] The second magnetic circuit array 222 may include a third side portion 2221 and a fourth side portion 2222 arranged opposite to each other and spaced apart along the second direction Y, and a seventh side portion 2223 and an eighth side portion 2224 arranged opposite to each other and spaced apart along the first direction X. The third side portion 2221, the seventh side portion 2223, the fourth side portion 2222, and the eighth side portion 2224 are sequentially connected to form a ring structure and surround a second cavity 2225. The third side portion 2221 and the fourth side portion 2222 are two sides of the second magnetic circuit array 222 arranged spaced apart along the second direction Y. Both the third side portion 2221 and the fourth side portion 2222 are magnetic elements with magnetic poles. In other words, the third side portion 2221 and the fourth side portion 2222 do not have magnetic plates. The fifth side portion 2213 and the seventh side portion 2223 are located on the same side of the magnetic circuit device 22, and the sixth side portion 2214 and the eighth side portion 2224 are located on the same side of the magnetic circuit device 22.

[0070] The first side 211 of the voice coil 21 is located within the first cavity 2215, that is, the first side 211 is located in the magnetic field of the first magnetic circuit array 221. The second side 212 of the voice coil 21 is located within the second cavity 2225, that is, the second side 212 is located in the magnetic field of the second magnetic circuit array 222. Understandably, the first side 2211, the first side 211, the second side 2212, the third side 2221, the second side 212, and the fourth side 2222 are arranged sequentially along the second direction Y.

[0071] Understandably, the voice coil 21 is located in the magnetic field of the first magnetic circuit array 221 and the magnetic field of the second magnetic circuit array 222. After current is passed through the voice coil 21, the voice coil 21 can be driven by the magnetic fields of the first magnetic circuit array 221 and the second magnetic circuit array 222 to move along the first direction X, and drive the diaphragm to vibrate along the first direction X.

[0072] The annular first magnetic circuit array 221 and the annular second magnetic circuit array 222 can reduce magnetic leakage to the outside of the magnetic circuit device 22. Both the first magnetic circuit array 221 and the second magnetic circuit array 222 can be Heilbeck arrays, which helps to concentrate the magnetic field lines of the first magnetic circuit array 221 within the first cavity 2215 and the magnetic field lines of the second magnetic circuit array 222 within the second cavity 2225, reducing magnetic leakage to the outside of the magnetic circuit device 22 and providing sufficient driving force for the voice coil 21. Understandably, the direction of the driving force on the voice coil 21 in the first magnetic circuit array 221 is the same as the direction of the driving force on the voice coil 21 in the second magnetic circuit array 222, so that the voice coil 21 can vibrate along the first direction X in the magnetic field of the magnetic circuit device 22.

[0073] In this embodiment, the first side 211 of the voice coil 21 is located within the first cavity 2215 of the annular first magnetic circuit array 221, and the second side 212 of the voice coil 21 is located within the second cavity 2225 of the annular second magnetic circuit array 222. The voice coil 21 moves within both the first and second cavities, thus being constrained within the magnetic circuit device 22. The annular first and second magnetic circuit arrays 221 and 222 effectively limit the movement of the voice coil 21, preventing it from jumping out of the magnetic circuit device 22 during its movement along the first direction X. If the voice coil 21 were to jump out of the magnetic circuit device 22 during its movement along the first direction X, the driving force on the voice coil 21 would be significantly reduced, leading to performance loss and distortion in the speaker 20. Furthermore, if the voice coil 21 jumps out of the magnetic circuit device 22 during its movement in the first direction X, it may cause the voice coil 21 to become misaligned in the second direction Y, preventing the voice coil 21 from moving back into the magnetic field of the magnetic circuit device 22. This would cause the voice coil 21 to become stuck, affecting the performance of the speaker 20.

[0074] This embodiment of the application sets two spaced-apart sides of the first magnetic circuit array 221 and two spaced-apart sides of the second magnetic circuit array 222 in the second direction Y to be magnetic components. The first side 2211, the fifth side 2213, the second side 2212, and the sixth side 2214 are sequentially connected to form a ring structure, and the third side 2221, the seventh side 2223, the fourth side 2222, and the eighth side 2224 are sequentially connected to form another ring structure. This makes the magnetic field distribution of the magnetic circuit device 22 more uniform, effectively reducing the attenuation of the driving force of the voice coil 21 under large amplitude, achieving nonlinear improvement of the driving force, reducing the distortion of the speaker 20 under large amplitude, and improving the low-frequency driving capability of the speaker 20. This embodiment of the application allows for a larger amplitude design of the speaker 20 within the limited dimensions of the speaker 20 in the first direction X.

[0075] Referring to Figure 8, the solid arrows on the first side 2211, second side 2212, fifth side 2213, sixth side 2214, third side 2221, fourth side 2222, seventh side 2223, and eighth side 2224 of the magnetic circuit device 22 in Figure 8 indicate the magnetization direction, i.e., the arrangement direction from the S pole to the N pole. The dashed arrows in Figure 8 indicate the magnetic field direction. The circles on the voice coil 21 in Figure 8 indicate the current direction. The solid arrows in Figure 8 that contact the circles on the voice coil 21 indicate the direction of the force on the voice coil 21. It is understandable that the magnetization direction is only indicated by arrows and cannot completely represent the magnetic field direction at every point in the magnet. Furthermore, the actual magnetization direction may deviate to some extent from the arrow indication.

[0076] The magnetization direction of the magnetic blocks in the first side portion 2211, the second side portion 2212, the fifth side portion 2213, and the sixth side portion 2214 is perpendicular to the current direction of the first side 211 of the voice coil 21. The magnetization direction of the magnetic blocks in the third side portion 2221, the fourth side portion 2222, the seventh side portion 2223, and the eighth side portion 2224 is perpendicular to the current direction of the second side 212 of the voice coil 21. The magnetic field lines inside the annular first magnetic circuit array 221 and the annular second magnetic circuit array 222 are perpendicular to the current direction of the voice coil 21. After the voice coil 21 is energized, it generates a Lorentz force and moves along the first direction X.

[0077] The magnetic components of the first side portion 2211, the second side portion 2212, the third side portion 2221, and the fourth side portion 2222 can each include at least two magnetic blocks, which is beneficial to improving the performance of the speaker 20. For example, the first side portion 2211, the second side portion 2212, the third side portion 2221, and the fourth side portion 2222 can each include two, three, four, five, or six magnetic blocks, etc. The fifth side portion 2213, the sixth side portion 2214, the seventh side portion 2223, and the eighth side portion 2224 can also each include one, two, or three magnetic blocks, etc., depending on the specific needs. The magnetization direction of the different magnetic blocks is along the direction of the magnetic circuit.

[0078] In some embodiments, the magnetic poles of the two outermost magnetic blocks of at least one of the first side portion 2211, the second side portion 2212, the third side portion 2221, and the fourth side portion 2222 are arranged in opposite directions in the first direction X. This is beneficial for the first side and the second side of the voice coil to be driven by the same direction, which is beneficial for the voice coil to reciprocate along the first direction.

[0079] Figure 8 shows examples where the first side portion 2211, the second side portion 2212, the third side portion 2221, and the fourth side portion 2222 each include three magnetic blocks, while the fifth side portion 2213, the sixth side portion 2214, the seventh side portion 2223, and the eighth side portion 2224 each include one magnetic block. In Figure 8, the magnetization directions of two adjacent magnetic blocks in the first magnetic circuit array 221 of the magnetic circuit device 22 are different; Figure 8 shows an example where the magnetization directions of two adjacent magnetic blocks in the first magnetic circuit array 221 of the magnetic circuit device 22 are perpendicular to each other. Similarly, in Figure 8, the magnetization directions of two adjacent magnetic blocks in the second magnetic circuit array 222 of the magnetic circuit device 22 are different; Figure 8 shows an example where the magnetization directions of two adjacent magnetic blocks in the second magnetic circuit array 222 of the magnetic circuit device 22 are perpendicular to each other. In Figure 8, the magnetization direction of the magnetic blocks in the middle of the first side portion 2211, the second side portion 2212, the third side portion 2221, and the fourth side portion 2222 is along the second direction Y, generating magnetic field lines along the second direction Y and guiding them to the region where the voice coil 21 is located. At both ends of the first side portion 2211, the second side portion 2212, the third side portion 2221, and the fourth side portion 2222, magnetic blocks magnetized along the first direction X are placed side-by-side, with the magnetization directions of the two side magnetic blocks opposite, generating magnetic field lines along the first direction X to form a magnetic circuit. The magnetization direction of the magnetic blocks in the fifth side portion 2213 and the sixth side portion 2214 is opposite to the magnetization direction of the magnetic blocks in the middle of the first side portion 2211 and the second side portion 2212. The magnetization direction of the magnetic blocks in the seventh side portion 2223 and the eighth side portion 2224 is opposite to the magnetization direction of the magnetic blocks in the middle of the third side portion 2221 and the fourth side portion 2222.

[0080] In other embodiments, the magnetization directions of two adjacent magnetic blocks in the magnetic circuit device 22 may not be perpendicular, or the magnetization directions of two adjacent magnetic blocks in the magnetic circuit device 22 may be the same. The magnetization direction of the magnetic blocks in the magnetic circuit device 22 can be set as needed, and this application embodiment does not limit this.

[0081] In some embodiments, when the first side portion 2211 includes two magnetic blocks, the middle magnetic block on the first side portion 2211 in FIG8 (i.e., the magnetic block on the first side portion 2211 whose magnetization direction is along the second direction Y) can be removed, and no gap may be provided between the first magnetic circuit array 221 and the second magnetic circuit array 222. When the first side portion 2211 includes four magnetic blocks, the magnetization direction of the two middle magnetic blocks can both be along the second direction Y.

[0082] In some embodiments, the magnetic pole arrangement direction of the first side portion 2211 and the magnetic pole arrangement direction of the fourth side portion 2222 can be mirror-symmetrical about the center line O, and the magnetic pole arrangement direction of the second side portion 2212 and the magnetic pole arrangement direction of the third side portion 2221 can be mirror-symmetrical about the center line O. By setting the magnetic pole arrangement direction of the first side portion 2211 to be mirror-symmetrical with the magnetic pole arrangement direction of the fourth side portion 2222, and the magnetic pole arrangement direction of the second side portion 2212 to be mirror-symmetrical with the magnetic pole arrangement direction of the third side portion 2221, it is beneficial to ensure that the first side 211 and the second side 212 of the voice coil 21 are driven by the same direction, which is beneficial to the reciprocating motion of the voice coil 21 along the first direction X.

[0083] In some embodiments, the magnetic pole arrangement direction of the fifth side portion 2213 is mirror-symmetrical to the magnetic pole arrangement direction of the sixth side portion 2214, and the magnetic pole arrangement direction of the seventh side portion 2223 is mirror-symmetrical to the magnetic pole arrangement direction of the eighth side portion 2224.

[0084] As shown in Figure 9A, which is a simulation diagram of the magnetic field of the magnetic circuit device 22 shown in Figure 8, the magnetic circuit device 22 has a uniform magnetic field. This results in a smaller change in the driving force experienced by the voice coil 21 when it moves within the magnetic field of the magnetic circuit device 22. This effectively reduces the attenuation of the driving force of the voice coil 21 under large amplitude, achieving nonlinear improvement of the driving force. This can reduce the distortion of the loudspeaker 20 under large amplitude and improve the low-frequency driving capability of the loudspeaker 20.

[0085] As shown in Figure 9B, Figure 9B is a schematic diagram of the relationship between the driving force and amplitude of the voice coil. The horizontal axis in Figure 9B represents the amplitude, and the vertical axis represents the driving force of the voice coil. The solid line in Figure 9B represents the relationship between the driving force and amplitude of the voice coil 21 in the magnetic circuit device 22 shown in Figure 8. The dashed line in Figure 9B represents the relationship between the driving force and amplitude of the voice coil in a prior art magnetic circuit device (the existing magnetic circuit device has a magnetic guide plate in the middle of the side arranged along the second direction Y). It can be seen that at large amplitudes, the driving force attenuation of the voice coil 21 in the magnetic circuit device 22 shown in Figure 8 is relatively small.

[0086] As shown in Figure 10, Figure 10 is a structural schematic diagram of the voice coil 21 and magnetic circuit device 22 of another type of loudspeaker shown in Figure 1. The fifth side portion 2213 can be a magnetic plate, or the sixth side portion 2214 can be a magnetic plate, or both the fifth side portion 2213 and the sixth side portion 2214 are magnetic plates. During manufacturing, the minimum thickness of the magnetic plate that can be manufactured is much smaller than the minimum thickness of the magnetic block that can be manufactured. By setting the fifth side portion 2213 and / or the sixth side portion 2214 as magnetic plates, the size of the magnetic circuit device 22 in the first direction X can be significantly reduced. Since the fifth side portion 2213 and the sixth side portion 2214 have little influence on the magnetic field strength of the magnetic circuit device 22, setting the fifth side portion 2213 and / or the sixth side portion 2214 as magnetic plates has little impact on the magnetic field strength of the magnetic circuit device 22, so that the loss of driving force experienced by the voice coil 21 in the magnetic field of the magnetic circuit device 22 is small, and sufficient driving force can be ensured for the voice coil 21. Since the fifth side portion 2213 and the sixth side portion 2214 have a relatively small impact on the magnetic circuit device 22, setting the fifth side portion 2213 and / or the sixth side portion 2214 as magnetic guide plates will not significantly change the magnetic field strength in the area where the voice coil 21 is located, and the magnetic field distribution of the magnetic circuit device 22 remains relatively uniform. Furthermore, since the strength of the magnetic block is less than that of the magnetic guide plate, the magnetic block is easily damaged during a drop, leading to breakage. Setting the fifth side portion 2213 and / or the sixth side portion 2214 as magnetic guide plates can increase the structural strength of the magnetic circuit device 22 and increase the structural stability of the speaker. Understandably, magnetic guide plates can be provided in the Heilbeck array. To avoid magnetic field concentration caused by the magnetic guide plates, the fifth side portion 2213 and the sixth side portion 2214 in the Heilbeck array can be set as magnetic guide plates.

[0087] When the fifth side portion 2213 is a magnetic plate, the number of magnetic blocks included in the magnetic plate of the fifth side portion 2213 can be one, two, or three, etc. When the sixth side portion 2214 is a magnetic plate, the number of magnetic blocks included in the magnetic plate of the sixth side portion 2214 can be one, two, or three, etc.

[0088] Understandably, the seventh side portion 2223 can be a magnetic plate, or the eighth side portion 2224 can be a magnetic plate, or both the seventh side portion 2223 and the eighth side portion 2224 can be magnetic plates. By setting the seventh side portion 2223 and / or the eighth side portion 2224 as magnetic plates, the size of the magnetic circuit device 22 in the first direction X can be significantly reduced. Since the seventh side portion 2223 and the eighth side portion 2224 have little influence on the magnetic field strength of the magnetic circuit device 22, setting the seventh side portion 2223 and / or the eighth side portion 2224 as magnetic plates has little impact on the magnetic field strength of the magnetic circuit device 22, resulting in less loss of driving force experienced by the voice coil 21 in the magnetic field of the magnetic circuit device 22, thus ensuring that the voice coil 21 receives sufficient driving force. Since the seventh side portion 2223 and the eighth side portion 2224 have a relatively small impact on the magnetic circuit device 22, setting the seventh side portion 2223 and / or the eighth side portion 2224 as magnetic guide plates will not significantly change the magnetic field strength in the area where the voice coil 21 is located, and the magnetic field distribution of the magnetic circuit device 22 remains relatively uniform. Furthermore, since the strength of the magnetic block is less than that of the magnetic guide plate, the magnetic block is easily damaged and may break during a drop. Setting the seventh side portion 2223 and / or the eighth side portion 2224 as magnetic guide plates can increase the structural strength of the magnetic circuit device 22 and increase the structural stability of the speaker.

[0089] When the seventh side 2223 is a magnetic plate, the number of magnetic blocks included in the magnetic plate of the seventh side 2223 can be one, two, or three, etc. When the eighth side 2224 is a magnetic plate, the number of magnetic blocks included in the magnetic plate of the eighth side 2224 can be one, two, or three, etc.

[0090] As shown in Figures 11 and 12A, Figure 11 is a structural schematic diagram of the voice coil 21 and magnetic circuit device 22 of another loudspeaker shown in Figure 1, and Figure 12A is a cross-sectional view of the voice coil 21 and magnetic circuit device 22 shown in Figure 11 at point DD. To show the magnetization direction of the magnetic circuit device 22 in Figure 12A, the cross-sectional lines are not shown in Figure 12A. The second side portion 2212 includes a first magnetic block 2216, and the third side portion 2221 includes a second magnetic block 2226. The first magnetic block 2216 and the second magnetic block 2226 are arranged along the second direction Y. The magnetic pole arrangement direction of the first magnetic block 2216 is the same as that of the second magnetic block 2226. In some embodiments, the first magnetic block 2216 and the second magnetic block 2226 can be connected as a single unit. The first magnetic block 2216 and the second magnetic block 2226 can be connected as a single unit. This can be because the first magnetic block 2216 and the second magnetic block 2226 are separate structures that are assembled and fixed into a single unit, or the first magnetic block 2216 and the second magnetic block 2226 are integrally formed and connected into a single unit during the manufacturing process.

[0091] This embodiment simplifies the architecture of the magnetic circuit device 22 by connecting the first magnetic block 2216 and the second magnetic block 2226 into a single integrated structure, which is beneficial for engineering. Since there is no gap between the first magnetic block 2216 and the second magnetic block 2226, the overall volume of the magnetic block formed after their connection is increased, thereby increasing the magnetic field strength of the magnetic circuit device 22 and thus increasing the driving force on the voice coil 21. Alternatively, by connecting the first magnetic block 2216 and the second magnetic block 2226 into a single integrated structure and reducing the size of the magnetic circuit device 22 in the second direction Y, the magnetic field strength of the magnetic circuit device 22 can also meet the requirements, and this also facilitates the miniaturization of the magnetic circuit device 22.

[0092] The second side portion 2212 may include a third magnetic block 2217, and the third side portion 2221 may include a fourth magnetic block 2227. The third magnetic block 2217 and the fourth magnetic block 2227 are arranged along the second direction Y. The magnetic pole arrangement direction of the third magnetic block 2217 is opposite to that of the fourth magnetic block 2227. The third magnetic block 2217 and the fourth magnetic block 2227 are spaced apart. In other words, there is a gap between the third magnetic block 2217 and the fourth magnetic block 2227. Understandably, since the magnetic pole arrangement direction of the third magnetic block 2217 is opposite to that of the fourth magnetic block 2227, the sides of the third magnetic block 2217 and the fourth magnetic block 2227 that are close to each other have the same type of magnetic pole, such as both being S poles. Since magnetic poles have the property of repulsion, it is necessary to set the third magnetic block 2217 and the fourth magnetic block 2227 apart to avoid mutual repulsion when the third magnetic block 2217 and the fourth magnetic block 2227 are close to each other, which would affect the structural stability of the magnetic circuit device 22.

[0093] Understandably, other adjacent magnetic blocks with the same magnetic pole arrangement direction on the second side 2212 and the third side 2221 can also be connected into an integral structure, and gaps can be set between other adjacent magnetic blocks with opposite magnetic pole arrangement directions on the second side 2212 and the third side 2221.

[0094] Referring to Figures 11 and 12A, when both the fifth side portion 2213 and the seventh side portion 2223 are magnetically conductive plates, the fifth side portion 2213 and the seventh side portion 2223 can be connected into a single integrated structure without any gap between them. The fifth side portion 2213 and the seventh side portion 2223 can be connected into a single integrated structure either because they are separate structures assembled and fixed into a single unit, or because they are integrally formed and connected during manufacturing. By connecting the fifth side portion 2213 and the seventh side portion 2223 into a single integrated structure, the structure of the magnetic circuit device 22 is simplified, and the structural stability of the magnetic circuit device 22 is increased.

[0095] Referring to Figures 11 and 12A, when both the sixth side portion 2214 and the eighth side portion 2224 are magnetic plates, the sixth side portion 2214 and the eighth side portion 2224 can be connected as a single unit. Understandably, there is no gap between the sixth side portion 2214 and the eighth side portion 2224. The connection of the sixth side portion 2214 and the eighth side portion 2224 into a single unit can be achieved by either the sixth side portion 2214 and the eighth side portion 2224 being separate structures assembled and fixed into a single unit, or by the sixth side portion 2214 and the eighth side portion 2224 being integrally formed and connected as a single unit during manufacturing. By setting the sixth side portion 2214 as a magnetic plate and the eighth side portion 2224 as a single unit, the structure of the magnetic circuit device 22 is simplified, and the structural stability of the magnetic circuit device 22 is increased.

[0096] As shown in Figure 12B, which is a structural schematic diagram of the voice coil 21 and magnetic circuit device 22 of another type of loudspeaker shown in Figure 1, the loudspeaker 20 may include an antimagnetic component 225, which is located between the third magnetic block 2217 and the fourth magnetic block 2227. The antimagnetic component 225 can prevent magnetic interference between the third magnetic block 2217 and the fourth magnetic block 2227. By setting the antimagnetic component 225, the gap between the third magnetic block 2217 and the fourth magnetic block 2227 can be reduced, which is beneficial to ensuring the miniaturization of the loudspeaker 20 and avoiding the instability of the magnetic circuit device 22 caused by the repulsion between the third magnetic block 2217 and the fourth magnetic block 2227.

[0097] As shown in Figures 13 and 14, Figure 13 is a structural schematic diagram of the voice coil 21 and magnetic circuit device 22 of another type of loudspeaker shown in Figure 1, and Figure 14 is a cross-sectional view of the voice coil 21 and magnetic circuit device 22 shown in Figure 13 at EE. To show the magnetization direction of the magnetic circuit device 22 in Figure 14, the cross-sectional lines are not shown in Figure 14. The fifth side portion 2213 includes a fifth magnetic block 2218 and a sixth magnetic block 2219. In some embodiments, the angle between the magnetic pole arrangement direction of the fifth magnetic block 2218 and the magnetic pole arrangement direction of the sixth magnetic block 2219 is greater than or equal to 0° and less than or equal to 90°. Exemplarily, the angle between the magnetic pole arrangement direction of the fifth magnetic block 2218 and the magnetic pole arrangement direction of the sixth magnetic block 2219 can be 10°, 20°, 30°, 40°, 50°, 60°, or 70°, etc. The fifth side portion 2213 may include one magnetic block (see Figure 8), two magnetic blocks, three magnetic blocks, four magnetic blocks, or five magnetic blocks, etc., with the magnetic pole arrangement direction of each magnetic block along the magnetic circuit direction. When the fifth side portion 2213 includes at least two magnetic blocks, the included angle between the magnetic pole arrangement directions of adjacent magnetic blocks on the fifth side portion 2213 is greater than or equal to 0° and less than or equal to 90°. In this embodiment of the application, by setting the fifth side portion 2213 to include at least two magnetic blocks, magnetic leakage can be effectively reduced, the magnetic field strength in the first cavity 2215 of the first magnetic circuit array 221 can be increased, the driving force on the voice coil 21 in the magnetic circuit device 22 can be increased, and the speaker performance can be improved.

[0098] Understandably, when the fifth side portion 2213 includes three magnetic blocks, the angle between the magnetic pole arrangement directions of any two adjacent magnetic blocks on the fifth side portion 2213 can be greater than or equal to 0° and less than or equal to 90°. The angle between the magnetic pole arrangement directions of two adjacent magnetic blocks on the fifth side portion 2213 can also be within other ranges, and the embodiments of this application do not limit this.

[0099] Understandably, the sixth side 2214, the seventh side 2223, and the eighth side 2224 may include one, two, three, four, or five magnetic blocks, etc. For details, please refer to the arrangement of magnetic blocks in the fifth side 2213; further details will not be provided here. When there are multiple magnetic blocks, the magnetization direction of the multiple magnetic blocks is along the direction of the magnetic circuit.

[0100] Referring to Figures 4, 15, and 16, Figure 15 is a structural schematic diagram of the voice coil 21 and magnetic circuit device 22 of another loudspeaker shown in Figure 1, and Figure 16 is a cross-sectional view of the voice coil 21 and magnetic circuit device 22 shown in Figure 15 at FF. The first side portion 2211 includes a first segment 22111 and a second segment 22112 arranged along the second direction Y. One end of the fifth side portion 2213 is stacked with the second segment 22112 and offset from the first segment 22111. Understandably, one end of the fifth side portion 2213 is stacked with the second segment 22112 in the first direction X, one end of the fifth side portion 2213 covers the second segment 22112, the fifth side portion 2213 does not overlap with the first segment 22111, and the fifth side portion 2213 does not cover the first segment 22111. Exemplarily, the first magnetic circuit array 221 may have a chamfer 22113.

[0101] When the magnetic circuit device 22 is applied to the loudspeaker 20, the fifth side portion 2213 is fixedly connected to the first region 2311 of the diaphragm 23, and the first region 2311 of the diaphragm 23 does not vibrate. The second region 2312 of the diaphragm 23 vibrates. By setting one end of the fifth side portion 2213 to be stacked with the second section 22112 and offset from the first section 22111, such as by setting a chamfer, the area of ​​the second region 2312 of the diaphragm 23 can be increased, making the vibrating area of ​​the diaphragm 23 larger, which is beneficial to improving the performance of the loudspeaker 20.

[0102] The second magnetic circuit array 222 can also be chamfered, as detailed in the settings of the first magnetic circuit array 221, which will not be repeated here, in order to improve the performance of the speaker 20 and increase the symmetry of the magnetic circuit device 22.

[0103] As shown in Figure 17, this is a schematic diagram of the voice coil 21 and magnetic circuit device 22 of another type of loudspeaker shown in Figure 1. The magnetic circuit device 22 includes a third magnetic circuit array 223 and a fourth magnetic circuit array 224. Both the third magnetic circuit array 223 and the fourth magnetic circuit array 224 are annular and arranged opposite to each other. The third magnetic circuit array 223 includes a third cavity 2231, which accommodates the third side 213 of the voice coil 21. The fourth magnetic circuit array 224 includes a fourth cavity 2241, which accommodates the fourth side 214 of the voice coil 21. By arranging the third magnetic circuit array 223 and the fourth magnetic circuit array 224, all four sides of the voice coil 21 are located within the magnetic circuit device 22, improving the utilization rate of the voice coil 21, which is beneficial for increasing the driving force on the voice coil 21 and improving the performance of the loudspeaker 20.

[0104] Understandably, the specific structures of the third magnetic circuit array 223 and the fourth magnetic circuit array 224 are the same as those of the first magnetic circuit array 221 and the second magnetic circuit array 222 mentioned above, and will not be repeated here.

[0105] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A loudspeaker (20) characterized by, It includes a voice coil (21), a diaphragm (23), a ring-shaped first magnetic circuit array (221), and a ring-shaped second magnetic circuit array (222); The diaphragm (23) is fixedly connected to the voice coil (21); The voice coil (21) includes a first side (211) and a second side (212) arranged opposite to each other; The first magnetic circuit array (221) includes a first cavity (2215) that accommodates the first side (211). The second magnetic circuit array (222) includes a second cavity (2225) that accommodates the second side (212). The magnetic field of the first magnetic circuit array (221) and the magnetic field of the second magnetic circuit array (222) are used to cause the energized voice coil (21) to drive the diaphragm (23) to move along the first direction (X). The two sides of the first magnetic circuit array (221) and the two sides of the second magnetic circuit array (222) that are spaced apart in the second direction (Y) are both magnetic elements. The second direction (Y) is set at an angle to the first direction (X).

2. The loudspeaker (20) as defined in claim 1, characterized in that The first magnetic circuit array (221) includes a first side portion (2211) and a second side portion (2212) arranged at intervals along the second direction (Y). The second magnetic circuit array (222) includes a third side portion (2221) and a fourth side portion (2222) arranged at intervals along the second direction (Y). The first side portion (2211), the first side portion (211), the second side portion (2212), the third side portion (2221), the second side portion (212), and the fourth side portion (2222) are arranged sequentially along the second direction (Y). The magnetic pole arrangement direction of the first side portion (2211) is mirror-symmetrical with the magnetic pole arrangement direction of the fourth side portion (2222). The magnetic pole arrangement direction of the second side portion (2212) is mirror-symmetrical with the magnetic pole arrangement direction of the third side portion (2221).

3. The loudspeaker (20) of claim 2, wherein The magnetic components of the first side (2211), the second side (2212), the third side (2221), and the fourth side (2222) each include at least two magnetic blocks.

4. The loudspeaker (20) as defined in claim 3, characterized in that At least one of the first side portion (2211), the second side portion (2212), the third side portion (2221), and the fourth side portion (2222), the magnetic poles of the two outermost magnetic blocks in the first direction (X) are arranged in opposite directions.

5. A loudspeaker (20) as claimed in any one of claims 2 to 4, characterised in that, The first magnetic circuit array (221) includes a fifth side portion (2213) and a sixth side portion (2214) arranged along the first direction (X). The first side portion (2211), the fifth side portion (2213), the second side portion (2212), and the sixth side portion (2214) are arranged to form a ring. The fifth side portion (2213) is a magnetic plate, and / or the sixth side portion (2214) is a magnetic plate.

6. A loudspeaker (20) as claimed in any one of claims 2-5, characterized in that The second side portion (2212) includes a first magnetic block (2216), and the third side portion (2221) includes a second magnetic block (2226). The first magnetic block (2216) and the second magnetic block (2226) are arranged along the second direction (Y). The magnetic pole arrangement direction of the first magnetic block (2216) is the same as that of the second magnetic block (2226). The first magnetic block (2216) and the second magnetic block (2226) are connected as an integral structure.

7. A loudspeaker (20) as claimed in any one of claims 2 to 6, characterised in that, The second side portion (2212) includes a third magnetic block (2217), and the third side portion (2221) includes a fourth magnetic block (2227). The third magnetic block (2217) and the fourth magnetic block (2227) are arranged along the second direction (Y). The magnetic pole arrangement direction of the third magnetic block (2217) is opposite to that of the fourth magnetic block (2227). The third magnetic block (2217) and the fourth magnetic block (2227) are spaced apart.

8. The loudspeaker (20) as defined in claim 7, characterized in that The loudspeaker (20) includes an antimagnetic element (225) located between the third magnet (2217) and the fourth magnet (2227).

9. A loudspeaker (20) as claimed in any of claims 2 to 8, characterised in that, The first magnetic circuit array (221) includes a fifth side (2213), which connects the first side (2211) and the second side (2212). The second magnetic circuit array (222) includes a seventh side (2223), which connects the third side (2221) and the fourth side (2222). The fifth side (2213) and the seventh side (2223) are located on the same side of the voice coil (21) and are both magnetic plates. The fifth side (2213) and the seventh side (2223) are connected as an integral structure.

10. A loudspeaker (20) as claimed in any of claims 2 to 9, characterised in that, The first magnetic circuit array (221) includes a fifth side portion (2213) and a sixth side portion (2214) arranged along the first direction (X). The first side portion (2211), the fifth side portion (2213), the second side portion (2212), and the sixth side portion (2214) are arranged in a ring. The fifth side portion (2213) includes a fifth magnetic block (2218) and a sixth magnetic block (2219). The angle between the magnetic pole arrangement direction of the fifth magnetic block (2218) and the magnetic pole arrangement direction of the sixth magnetic block (2219) is greater than or equal to 0° and less than or equal to 90°.

11. A loudspeaker (20) as claimed in any of claims 2 to 10, characterised in that, The first side portion (2211) includes a first segment (22111) and a second segment (22112) arranged along the second direction (Y). The first magnetic circuit array (221) includes a fifth side portion (2213), which connects the first side portion (2211) and the second side portion (2212). One end of the fifth side portion (2213) is stacked with the second segment (22112) and offset from the first segment (22111).

12. A loudspeaker (20) as claimed in any of claims 1 to 11, characterised in that, The loudspeaker (20) includes a third magnetic circuit array (223) and a fourth magnetic circuit array (224), both of which are annular and arranged opposite to each other. The third magnetic circuit array (223) includes a third cavity (2231) for accommodating the third side (213) of the voice coil (21). The fourth magnetic circuit array (224) includes a fourth cavity (2241) for accommodating the fourth side (214) of the voice coil (21).

13. A loudspeaker (20) as claimed in any of claims 1 to 12, characterised in that, Both the first magnetic circuit array (221) and the second magnetic circuit array (222) are Heilbeck arrays.

14. A loudspeaker (20) as claimed in any of claims 1 to 13, characterised in that, A portion of the first magnetic circuit array (221) and a portion of the second magnetic circuit array (222) are embedded in the diaphragm (23).

15. A loudspeaker (20) as claimed in any of claims 1 to 14, characterised in that, The loudspeaker (20) includes a dome (25), which includes a first plate (251) and a third plate (253) extending in different directions. The first plate (251) is fixed to the side of the diaphragm (23) facing the voice coil (21), and the voice coil (21) is fixedly connected to the third plate (253).

16. The loudspeaker (20) of claim 15, wherein The dome (25) includes a second plate (252), the extension direction of which is different from that of the first plate (251), and the second plate (252) is closer to the edge of the first plate (251) than the third plate (253). The loudspeaker (20) includes a frame (24) and a diaphragm (27). The edge of the diaphragm (23) is fixed to the frame (24), and the diaphragm (27) is fixedly connected to the frame (24) and the second plate (252).

17. An electronic device (100), characterized by It includes a processor (10) and a speaker (20) as claimed in any one of claims 1-16, the speaker (20) being electrically connected to the processor (10).

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