Speakers and electronic devices

Abstract

This application provides a loudspeaker and an electronic device. The loudspeaker includes a mounting housing, a bracket, a vibrating element, a voice coil, a magnetic element, and a washer. The mounting housing has a sound chamber, and the bracket, vibrating element, voice coil, magnetic element, and washer are all mounted in the sound chamber along the thickness direction of the loudspeaker. The vibrating element is fixedly connected to the mounting housing, and the voice coil is fixedly connected to the vibrating element. The bracket is fixedly connected to the mounting housing, the magnetic element is fixedly connected to the bracket, and the washer is connected to the magnetic element. At least a portion of the magnetic element is inserted into the washer, and the magnetic element has a magnetic gap. At least a portion of the voice coil is located within the magnetic gap. In this application, because at least a portion of the magnetic element is inserted into the washer, that is, a portion of the magnetic element is disposed in the ineffective area located at the center of the washer, the magnetic field generated by the magnetic element is strengthened.

Description

Technical Field

[0001] This application relates to the field of sound generation technology, and more particularly to a loudspeaker and electronic device. Background Technology

[0002] With the widespread use of mobile phones and other electronic products, the demand for thinner and lighter electronic products is increasing. Foldable screen phones, in particular, have two layers when folded, which poses a greater challenge to the thickness of foldable screen phones compared to ordinary phones.

[0003] As an essential component of mobile phones, the speaker occupies space in the thickness direction, which is one of the factors affecting the phone's overall thickness. Therefore, how to improve the speaker's sound quality while also minimizing its thickness is a problem that urgently needs to be solved. Summary of the Invention

[0004] This application provides a loudspeaker and electronic device that increases the density of magnetic field lines inside the loudspeaker, thereby improving the performance of the loudspeaker, and the loudspeaker has a smaller thickness.

[0005] This application provides a loudspeaker, comprising: a mounting housing, a bracket, a vibrating element, a voice coil, a magnetic element, and a washer; the mounting housing has a sound chamber, and the bracket, vibrating element, voice coil, magnetic element, and washer are all mounted in the sound chamber along the thickness direction of the loudspeaker; the vibrating element is fixedly connected to the mounting housing, and the voice coil is fixedly connected to the vibrating element. The bracket is fixedly connected to the mounting housing, the magnetic element is fixedly connected to the bracket, and the washer is connected to the magnetic element; at least a portion of the magnetic element is inserted into the washer, the magnetic element has a magnetic gap, and at least a portion of the voice coil is located within the magnetic gap.

[0006] In this application, the magnetic component generates a magnetic field within the magnetic gap. When the voice coil receives an audio signal (actually a current signal), it generates a Lorentz force in the magnetic field perpendicular to the voice coil. This Lorentz force drives the voice coil to move in the direction perpendicular to the magnetic field of the magnetic component (Z-direction). The voice coil then causes at least a portion of the vibrating component to move in the Z-direction. This vibration of the vibrating component causes the surrounding air to vibrate, thus producing sound. Specifically, the Lorentz force F = BL*i, where B is the magnetic flux density, L is the effective linear length of the voice coil 32, and i is the current in the voice coil 32. With L and i remaining constant, a larger B results in a larger F. Therefore, a stronger magnetic field increases the Lorentz force, allowing the voice coil to vibrate better, which in turn causes the voice coil to drive the vibrating component to move more significantly. This increases the intensity of the air vibration driven by the vibrating component, improving the loudness and sensitivity of the sound, thus enhancing the performance of the loudspeaker.

[0007] In this application, since the magnetic component is at least partially inserted into the washer, that is, a portion of the magnetic component is placed in the ineffective area located in the center of the washer, thereby strengthening the magnetic field generated by the magnetic component.

[0008] In some embodiments, the magnetic component includes a center magnet, a side magnet, and a supplementary magnet; the washer includes a center washer and a side washer; both the center magnet and the side magnet are fixedly connected to a bracket, the side magnet surrounds the center magnet, and the supplementary magnet is located on the side of the center magnet away from the bracket; a first gap exists between the side magnet and the center magnet; the center washer is fixed to the side of the center magnet away from the bracket, and the side washer is fixed to the side of the side magnet away from the bracket; the side washer surrounds the center washer, and a second gap exists between the side washer and the center washer; the first gap and the second gap communicate to form a magnetic gap, and the supplementary magnet is at least partially inserted into the center washer. A first magnetic field exists within the magnetic gap, and the side magnet and the supplementary magnet generate a second magnetic field within the magnetic gap; at least a portion of the voice coil is located within the first magnetic field and the second magnetic field.

[0009] In this embodiment, the supplementary magnet, in conjunction with the edge magnet, generates a second magnetic field within the magnetic gap. This second magnetic field supplements the first magnetic field, significantly increasing the magnetic induction intensity B, and consequently, the Lorentz force F. The increased Lorentz force leads to a larger amplitude of voice coil movement, which in turn increases the amplitude of the vibrating component's movement, resulting in enhanced air vibration, increased loudness of the emitted sound, and improved sensitivity. Gaussmeter measurements show that the supplementary magnet configuration in this embodiment increases the magnetic field strength by 28%-34%.

[0010] In some embodiments, the central washer includes a washer body and a supplementary clearance hole, the supplementary clearance hole being formed in the washer body ring; a supplementary magnet is fixed inside the supplementary clearance hole. That is, the supplementary magnet occupies the central area of ​​the central washer, which saves space and does not affect the magnetic conduction function of the central washer.

[0011] In some embodiments, the thickness of the supplementary magnet is less than or equal to the thickness of the washer body. This allows the supplementary magnet to be completely located within the supplementary clearance hole, thereby saving space and making the speaker structure more compact.

[0012] In some embodiments, the washer body includes a first magnetically conductive surface and a second magnetically conductive surface opposite to each other along the thickness direction of the speaker; a supplementary clearance hole penetrates through the first magnetically conductive surface; the supplementary magnet includes a third magnetic surface and a fourth magnetic surface opposite to each other along the thickness direction of the speaker; the fourth magnetic surface contacts the bottom surface of the supplementary clearance hole, and the third magnetic surface is flush with the first magnetically conductive surface. That is, the supplementary clearance hole is a blind hole. In this case, the bottom surface of the supplementary clearance hole can support the supplementary magnet and strengthen the structural strength of the central washer.

[0013] In some embodiments, the washer body includes a first magnetically conductive surface and a second magnetically conductive surface opposite to each other along the thickness direction of the speaker; a supplementary clearance hole penetrates through the first and second magnetically conductive surfaces; the supplementary magnet includes a third magnetic surface and a fourth magnetic surface opposite to each other along the thickness direction of the speaker; the fourth magnetic surface is flush with the second magnetically conductive surface, and the third magnetic surface is flush with the first magnetically conductive surface. That is, the supplementary clearance hole is a through hole, thereby allowing the supplementary magnet to be thicker, which in turn strengthens the magnetic field strength within the magnetic gap.

[0014] In some embodiments, the supplementary magnet is located in the central region of the central washer. This makes the distance between the supplementary magnet and the edge magnet more uniform, thereby improving the uniformity of the magnetic field.

[0015] In some embodiments, the vibrating element includes a diaphragm and a sheet, the diaphragm having a hollowed-out area in the center, a mounting housing fixedly connected to the edge of the diaphragm, and the sheet located within the hollowed-out area and fixedly connected to the diaphragm; the diaphragm and sheet divide the sound chamber into a sealed chamber and a sound outlet chamber; the bottom surface of the sealed chamber is opposite to the diaphragm and sheet; the mounting housing has an inner sound outlet hole communicating with the sound outlet chamber; a voice coil is fixedly connected to the sheet; a bracket, a voice coil, a magnetic element, and a washer are located within the sealed chamber, the bracket is fixedly connected to the bottom surface of the sealed chamber, a central magnet and a central washer are sequentially stacked on the side of the bracket facing away from the bottom surface of the sealed chamber, and side magnets and side washers are sequentially stacked on the side of the bracket facing away from the bottom surface of the sealed chamber; the voice coil at least partially surrounds the central magnet, the central washer, and the supplementary magnet, such that the voice coil is located within the magnetic gap.

[0016] In some embodiments, the side magnet has a first through hole that extends through the side magnet along the thickness direction of the speaker; the side washer has a second through hole that extends through the side washer along the thickness direction of the speaker; the first through hole and the second through hole are connected to form a through hole, and the center washer, the center magnet and the supplementary magnet are all located in the through hole.

[0017] In some embodiments, the side magnet includes a side magnet inner surface and a side magnet outer surface, the side magnet inner surface being the hole wall surface of the first through hole, and the side magnet outer surface being opposite to the first through hole; the side washer includes a second magnetic inner surface and a second magnetic outer surface, the second magnetic inner surface being the hole wall surface of the second through hole, and the second magnetic outer surface being opposite to the second through hole; in the thickness direction of the speaker, the side magnet inner surface is flush with the first magnetic inner surface, and the side magnet outer surface is flush with the second magnetic outer surface.

[0018] In some embodiments, the central magnet includes a first magnetic circumferential surface surrounding an axis in the thickness direction of the speaker, and the central washer includes a first magnetically conductive outer surface in the axial direction surrounding the thickness direction of the speaker, wherein the first magnetic circumferential surface and the first magnetically conductive outer surface are flush in the thickness direction of the speaker.

[0019] The second aspect of this application provides an electronic device, including a housing, a motherboard, and a speaker according to any one of the first aspects of this application; the speaker and the motherboard are mounted in the housing, and the motherboard is electrically connected to a voice coil.

[0020] In this application, the magnetic component generates a magnetic field within the magnetic gap. When the voice coil receives an audio signal (actually a current signal), it generates a Lorentz force in the magnetic field perpendicular to the voice coil. This Lorentz force drives the voice coil to move in the direction perpendicular to the magnetic field of the magnetic component (Z-direction). The voice coil then causes at least a portion of the vibrating component to move in the Z-direction. This vibration of the vibrating component causes the surrounding air to vibrate, thus producing sound. Specifically, the Lorentz force F = BL*i, where B is the magnetic flux density, L is the effective linear length of the voice coil 32, and i is the current in the voice coil 32. With L and i remaining constant, a larger B results in a larger F. Therefore, a stronger magnetic field increases the Lorentz force, allowing the voice coil to vibrate better, which in turn causes the voice coil to drive the vibrating component to move more significantly. This increases the intensity of the air vibration driven by the vibrating component, improving the loudness and sensitivity of the sound, thus enhancing the performance of the loudspeaker.

[0021] In this application, since the magnetic component is at least partially inserted into the washer, that is, a portion of the magnetic component is placed in the ineffective area located in the center of the washer, thereby strengthening the magnetic field generated by the magnetic component. Attached Figure Description

[0022] 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.

[0023] Figure 1 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application.

[0024] Figure 2 yes Figure 1 The diagram shows the split structure of the electronic device shown.

[0025] Figure 3 yes Figure 2 The diagram shows the structure of the loudspeaker.

[0026] Figure 4 yes Figure 2 The diagram shows the internal structure of the loudspeaker.

[0027] Figure 5 yes Figure 3 The diagram shows a split structure of the loudspeaker.

[0028] Figure 6 yes Figure 5 The diagram shows a cross-sectional view of the mounting housing for the speaker.

[0029] Figure 7 yes Figure 5 The diagram shows a split structure of the speaker mounting housing.

[0030] Figure 8 yes Figure 5 The diagram shows the structure of the speaker's vibration module.

[0031] Figure 9 yes Figure 8 The diagram shows the split structure of the vibration module.

[0032] Figure 10 yes Figure 5 The diagram shows the structure of the magnetic module of the speaker.

[0033] Figure 11 yes Figure 10 The diagram shows a structural schematic of the magnetic module from another perspective.

[0034] Figure 12 yes Figure 10 The diagram shows the split structure of the magnetic module.

[0035] Figure 13 yes Figure 5 A schematic diagram of another embodiment of the central washer of the vibration module shown.

[0036] Figure 14 yes Figure 2 The diagram shows a cross-sectional view of the speaker. Detailed Implementation

[0037] The embodiments of this application are described below with reference to the accompanying drawings.

[0038] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the electronic device 1000 provided in the embodiments of this application. Figure 2 yes Figure 1 The diagram shows the split structure of the electronic device 1000. The electronic device 1000 includes a cellphone, notebook computer, tablet computer, personal digital assistant, wearable device, or mobile device, etc. The cellphone can be a regular cellphone or a foldable screen phone. In this embodiment, a cellphone is used as an example for illustration.

[0039] For ease of description, the width direction of the electronic device 1000 is defined as the X direction, the length direction of the electronic device 1000 is defined as the Y direction, and the thickness direction of the electronic device 1000 is defined as the Z direction. The X, Y, and Z directions are all perpendicular to each other.

[0040] The mobile phone includes a housing 1100, a display screen 1110, a motherboard 1200, and a speaker 100. The motherboard 1200 and the speaker 100 are installed inside the housing 1100. The speaker 100 has a sound outlet 101, and the housing 1100 has an external sound outlet 1101. The sound emitted by the speaker 100 is transmitted from the internal sound outlet 101 to the external sound outlet 1101, and then from the external sound outlet 1101 to the outside.

[0041] The housing 1100 includes a mid-frame 1120 and a back panel 1130. The display screen 1110 and the back panel 1130 are mounted on opposite sides of the mid-frame 1120, and the display screen 1110, the back panel 1130 and the mid-frame 1120 enclose an installation space for accommodating components such as the motherboard 1200 and the speaker 100.

[0042] The display screen 1110 includes a display surface and a mounting surface, which are disposed opposite to each other. The display surface of the display screen 1110 faces away from the back panel 1130, and the mounting surface of the display screen 1110 faces the back panel 1130. In this embodiment, the display screen 1110 can be an organic light-emitting diode (OLED) display screen 1110, an active-matrix organic light-emitting diode (AMOLED) display screen 1110, a mini organic light-emitting diode (MLED) display screen 1110, a micro organic light-emitting diode (MLED) display screen 1110, or a quantum dot light-emitting diode (QLED) display screen 1110.

[0043] The middle frame 1120 is a cuboid frame, including a first plate 1121, a second plate 1122, a third plate 1123, and a fourth plate 1124 connected end to end, and a connecting plate 1125. The connecting plate 1125 is fixedly connected to the side of the first plate 1121 facing the third plate 1123, and the connecting plate 1125 is located within the installation space. An external sound hole 1101 is provided on the first plate 1121, and the external sound hole 1101 connects the installation space to the outside.

[0044] The motherboard 1200 is installed in the installation space. The motherboard 1200 is equipped with a power amplifier (PA), which is electrically connected to the central processing unit (CPU). After receiving the audio signal sent by the CPU, the power amplifier amplifies and processes the audio signal, and then sends the processed audio signal to the speaker 100.

[0045] The speaker 100 is electrically connected to the power amplifier. The speaker 100 is a device that converts electrical signals into sound signals; it can also be called a horn or loudspeaker. The mobile phone can listen to music or make hands-free calls through the speaker 100. The speaker 100 is located within the mounting space and is fixedly connected to the connecting plate 1125. The inner sound outlet 101 of the speaker 100 is directly opposite the outer sound outlet 1101. After receiving the audio signal sent by the power amplifier, the speaker 100 vibrates and produces sound according to the audio signal. The sound emitted by the speaker 100 is transmitted from the inner sound outlet 101 to the outer sound outlet 1101, and then diffused from the outer sound outlet 1101 to the outside of the mobile phone.

[0046] Please see Figures 3 to 5 , Figure 3 yes Figure 2 The schematic diagram of the loudspeaker shown is as follows. Figure 4 yes Figure 2 The diagram shows the internal structure of the loudspeaker. Figure 5 yes Figure 3 The diagram shows the split structure of the speaker. To clearly show the internal structure of the speaker, Figure 4 The bracket is not shown.

[0047] The speaker 100 includes a mounting housing 10 and a bracket 20 (such as...). Figure 5As shown in the figure, the mounting housing 10 includes a vibration module 30, a magnetic module 40, and a circuit board (not shown). A sound chamber 17 is provided within the mounting housing 10, and the bracket 20, vibration module 30, and magnetic module 40 are all installed within the sound chamber 17. The vibration module 30 and bracket 20 are both connected to the mounting housing 10, and the magnetic module 40 is connected to the bracket 20. The magnetic module 40 generates a uniform magnetic field. When at least a portion of the vibration module 30 is energized, it moves within the uniform magnetic field, causing the surrounding air to vibrate and thus producing sound.

[0048] The vibration module 30 includes a vibrating element 31 and a voice coil 32. The vibrating element 31 is fixedly connected to the mounting housing 10, and the voice coil 32 is fixedly connected to the vibrating element 31. The vibrating element 31 is a diaphragm layer. The vibrating element 31 can move with the movement of the voice coil 32. When the vibrating element 31 moves, it can drive the surrounding air to vibrate, thereby emitting sound in the sound chamber 17.

[0049] The magnetic module 40 includes a magnetic component 40a and a washer 40b, both of which are connected to a bracket 20. The magnetic component 40a includes a central magnet 41, a side magnet 42, and a supplementary magnet 43. The washer 40b includes a central washer 44 and a side washer 45. The bracket 20 is fixed to the top surface of the sound chamber 17. The washer 40b and the magnetic component 40a are arranged along the Z-axis. The central magnet 41 and the side magnet 42 are both fixedly connected to the bracket 20, with the side magnet 42 surrounding the central magnet 41. The supplementary magnet 43 is located on the side of the central magnet 41 facing away from the bracket 20. A first gap 401a exists between the side magnet 42 and the central magnet 41. The central washer 44 is stacked and fixed on the side of the central magnet 41 facing away from the bracket 20, and the side washer 45 is stacked and fixed on the side of the side magnet 42 facing away from the bracket 20. A side washer 45 surrounds a center washer 44, with a second gap 401b between the side washer 45 and the center washer 44. The first gap 401a and the second gap 401b connect to form a magnetic gap 401, and a supplementary magnet 43 is at least partially inserted into the center washer 44. A first magnetic field exists within the magnetic gap 401, which is the magnetic field generated between the side magnet 42 and the center magnet 41. The side magnet 42 and the supplementary magnet 43 generate a second magnetic field within the magnetic gap 401. At least a portion of the voice coil 32 is located within both the first and second magnetic fields.

[0050] Along the Z-direction, the voice coil 32 is inserted into the magnetic gap 401, and the side of the voice coil 32 is perpendicular to the magnetic field direction of the magnetic component 40a. The circuit board of the speaker 100 is connected to the voice coil 32 and the power amplifier. The circuit board transmits the audio signal processed by the power amplifier to the voice coil 32. After receiving the audio signal, which is actually a current signal, the voice coil 32 generates a Lorentz force in the first and second magnetic fields perpendicular to the voice coil 32. The Lorentz force drives the voice coil 32 to move along the direction perpendicular to the magnetic field of the magnetic component 40a (Z-direction). The voice coil 32 causes at least a part of the vibrating component 31 to move along the Z-direction. When the vibrating component 31 vibrates, it pushes the surrounding air to vibrate, thereby emitting sound. The emitted sound is transmitted to the outside of the mobile phone through the inner sound outlet 101 of the speaker 100 and the outer sound outlet 1101 of the mobile phone.

[0051] Please see Figure 5 , Figure 6 and Figure 7 , Figure 6 yes Figure 5 The diagram shows a cross-sectional view of the speaker mounting housing. Figure 7 yes Figure 5 The diagram shows a split structure of the speaker mounting housing.

[0052] In this embodiment, the mounting housing 10 is rectangular, and includes a first housing 11, a second housing 12, and a middle housing 13. The first housing 11 is a rectangular groove with an opening on one side, and has a first chamber 14. The second housing 12 is a rectangular groove with an opening on one side, and has a second chamber 15. The middle housing 13 is a rectangular thin plate, and includes a first surface 18 and a second surface 19 opposite to each other along the Z direction. A mounting groove 16 is provided in the middle of the middle housing 13, and the mounting groove 16 penetrates the first surface 18 and the second surface 19. In other embodiments, the mounting housing 10 may be circular, elliptical, triangular, square, or other shapes, and this application is not limited to these shapes.

[0053] The first housing 11, the middle housing 13, and the second housing 12 are stacked sequentially along the Z direction. The openings of the first housing 11 and the second housing 12 face the first surface 18 and the second surface 19 of the middle housing 13, respectively. The first housing 11 is fixedly connected to the edge of the first surface 18, and the second housing 12 is fixedly connected to the edge of the second surface 19. The first chamber 14, the mounting groove 16, and the second chamber 15 are sequentially connected, forming the sound chamber 17 of the mounting housing 10. The sound chamber 17 is used to accommodate the bracket 20, the vibrating element 31, the magnetic element, the washer, and the voice coil 32.

[0054] Please see Figure 5In this embodiment, the bracket 20 is a rectangular thin plate. The bracket 20 includes a first support surface 21 and a second support surface 22 opposite to each other along the Z direction. The bracket 20 is installed inside the first housing 11. The first support surface 21 is used for fixed connection with the surface of the first housing 11 facing the second housing 12, and the second support surface 22 faces the opening of the first housing 11 for fixed connection with a magnetic component. In other embodiments, the bracket 20 is a circular, square, or triangular thin plate, and is annular.

[0055] Please refer to the following: Figure 8 and Figure 9 , Figure 8 yes Figure 5 The diagram shows the structure of the speaker's vibration module. Figure 9 yes Figure 8 The diagram shows the split structure of the vibration module.

[0056] In this embodiment, the vibrating element 31 of the vibration module 30 includes a diaphragm 311 and a sheet 312. The diaphragm 311 is a rectangular ring. The diaphragm 311 includes a first straight portion 313, an arc-shaped portion 314, and a second straight portion 315. The first straight portion 313 is a rectangular ring; in other words, the middle part of the first straight portion 313 is a hollow area. The inner edge of the first straight portion 313 faces the hollow area, and the inner edge of the arc-shaped portion 314 is fixedly connected to the outer edge of the first straight portion 313. The arc-shaped portion 314 has an annular groove that surrounds the hollow area. The second straight portion 315 surrounds the outer edge of the arc-shaped portion 314 and is fixedly connected to the outer edge of the arc-shaped portion 314. One side of the arc-shaped portion 314 is recessed downward relative to the first straight portion 313 and the second straight portion 315 to form the aforementioned annular groove, while the other side of the arc-shaped portion 314 protrudes relative to the first straight portion 313 and the second straight portion 315. This can be understood as the second straight portion 315 fitting around the outer periphery of the arc-shaped portion 314, and the arc-shaped portion 314 fitting around the outer periphery of the first straight portion 313, with the arc-shaped portion 314 recessed in the thickness direction.

[0057] The diaphragm 312 is a rectangular thin sheet and includes a top surface 316 and a bottom surface 317 arranged opposite to each other along the Z direction. The diaphragm 312 is located within the hollowed-out area of ​​the arc-shaped portion 314 and is fixedly connected to the first straight portion 313. Specifically, the edge of the bottom surface 317 of the diaphragm 312 is bonded and fixed to the side of the first straight portion 313 that protrudes towards the arc-shaped portion 314. In other embodiments, the diaphragm 311 and the diaphragm 312 can be circular, elliptical, triangular, square, parallelogram, etc., and this application is not limited to these shapes.

[0058] The voice coil 32 of the vibration module 30 is a rectangular closed ring. The voice coil 32 includes an inner ring surface 321 and an outer ring surface 322 arranged opposite to each other, and a first ring surface 323 and a second ring surface 324 arranged opposite to each other along the Z-direction. The voice coil 32 has a hollow region 325 extending through it along the Z-direction. The inner ring surface 321 faces the hollow region 325 and surrounds the Z-axis. The outer ring surface 322 faces away from the hollow region 325 and surrounds the Z-axis. The opposite sides of the first ring surface 323 connect an edge of the inner ring surface 321 and an edge of the outer ring surface 322. The inner and outer sides of the second ring surface 324 connect the lower ends of the inner ring surface 321 and the outer ring surface 322, respectively. The widths of the first ring surface 323 and the second ring surface 324 are equal, and this width is the dimension from the inner ring surface 321 to the outer ring surface 322. The inner ring surface 321 and the outer ring surface 322 have equal heights along the Z-direction, and the height of the inner ring surface 321 is much larger than the width of the first ring surface 323. It can be understood that the height of the inner ring surface 321 and the outer ring surface 322 along the Z-direction is equal to the thickness of the voice coil 32; in the X or Y direction, the voice coil 32 is a narrow strip. The second ring surface 324 of the voice coil 32 is fixedly connected to the diaphragm 312, specifically, the second ring surface 324 of the voice coil 32 is bonded to and fixed to the top surface 316 of the diaphragm 312.

[0059] Please see Figures 10 to 12 , Figure 10 yes Figure 5 The diagram shows the structure of the magnetic module of the speaker. Figure 11 yes Figure 10 Another structural schematic diagram of the magnetic module shown. Figure 12 yes Figure 10 The diagram shows the split structure of the magnetic module.

[0060] In this embodiment, the magnetic component 40a of the magnetic module 40 includes a central magnet 41, a side magnet 42, and a supplementary magnet 43. The central magnet 41 is a rectangular thin plate and includes a first magnetic surface 411 and a second magnetic surface 412 arranged opposite to each other along the Z direction, as well as a first magnetic peripheral surface 413 connecting the first magnetic surface 411 and the second magnetic surface 412. The magnetic pole of the first magnetic surface 411 is the N pole, and the magnetic pole of the second magnetic surface 412 is the S pole.

[0061] The side magnet 42 is a rectangular ring. The side magnet 42 includes an inner side magnet surface 422 and an outer side magnet surface 423 arranged opposite to each other, and a top side magnet surface 424 and a bottom side magnet surface 425 arranged opposite to each other along the Z-direction; the magnetic pole of the top side magnet surface 424 is the S pole, and the magnetic pole of the bottom side magnet surface 425 is the N pole. The side magnet 42 has a first through hole 421. The inner side magnet surface 422 is the wall surface of the first through hole 421, and the outer side magnet surface 423 is the outer peripheral surface of the side magnet 42 and is opposite to the first through hole 421. The top side magnet surface 424 and the bottom side magnet surface 425 are both connected to the outer side magnet surface 423, and the top side magnet surface 424 and the bottom side magnet surface 425 are also connected to the inner side magnet surface 422, which is the wall surface of the first through hole 421.

[0062] The supplementary magnet 43 is a rectangular thin plate. The supplementary magnet 43 includes a third magnetic surface 431 and a fourth magnetic surface 432 arranged opposite to each other along the Z direction, and a second magnetic peripheral surface 433 connecting the third magnetic surface 431 and the fourth magnetic surface 432. The magnetic pole of the third magnetic surface 431 is the N pole, and the magnetic pole of the fourth magnetic surface 432 is the S pole.

[0063] The washer 40b of the magnetic module 40 includes a central washer 44 and an edge washer 45. The central washer 44 includes a washer body 441 and a supplementary clearance hole 442. The washer body 441 is a rectangular ring. The washer body 441 has a first magnetically conductive surface 443 and a second magnetically conductive surface 444 arranged opposite to each other along the Z direction, and includes a first magnetically conductive outer surface 446, a first magnetically conductive inner surface 445, and a supplementary clearance hole 442. The hole wall of the supplementary clearance hole 442 is the first magnetically conductive inner surface 445. The first magnetically conductive outer surface 446 is the outer peripheral surface of the washer body 441 and is opposite to the supplementary clearance hole 442. The first magnetically conductive surface 443 and the second magnetically conductive surface 444 are both connected to the first magnetically conductive outer surface 446, and the first magnetically conductive surface 443 and the second magnetically conductive surface 444 are also connected to the first magnetically conductive inner surface 445, that is, to both sides of the hole wall of the supplementary clearance hole 442.

[0064] In one embodiment, the thickness of the edge washer 45 along the Z direction is approximately half the thickness of the edge magnet 42 along the Z direction. That is, the second magnetic inner surface 452 of the edge washer 45 is half the height of the inner magnetic surface 422 of the edge magnet 42, and the second magnetic outer surface 453 of the edge washer 45 is half the height of the outer magnetic surface 423 of the edge magnet 42.

[0065] In one embodiment, please refer to Figure 13 , Figure 13 yes Figure 5The diagram shows another embodiment of the central washer of the vibration module shown. The washer body 441 is a rectangular thin plate, and the supplementary clearance hole 442 is a blind hole, which is formed by the first magnetically conductive surface 443 being recessed towards the second magnetically conductive surface 444. That is, the supplementary clearance hole 442 only penetrates the first magnetically conductive surface 443 and does not penetrate the second magnetically conductive surface 444. Thus, the supplementary magnet 43 can utilize the ineffective part of the washer body 441, while also making the structural strength of the washer body 441 stronger and its magnetic permeability better.

[0066] Please refer to it again. Figure 12 The washer 45 is a rectangular ring. The washer 45 includes a second magnetically conductive inner surface 452 and a second magnetically conductive outer surface 453 arranged opposite to each other, and a third magnetically conductive surface 454 and a fourth magnetically conductive surface 455 arranged opposite to each other along the Z-direction. The washer 45 has a second through hole 451, the wall surface of which is the second magnetically conductive inner surface 452, and the second magnetically conductive outer surface 453 is the outer peripheral surface of the washer 455, facing away from the second through hole 451. The third magnetically conductive surface 454 and the fourth magnetically conductive surface 455 are both connected to the second magnetically conductive outer surface 453, and also connected to the second magnetically conductive inner surface 452, i.e., both sides of the wall surface of the second through hole 451.

[0067] Please see Figure 14 , Figure 14 yes Figure 2 The diagram shows a cross-sectional view of the speaker.

[0068] In this embodiment, the bracket 20, the vibration module 30, and the magnetic module 40 are all installed within the sound chamber 17 of the mounting housing 10. Specifically, the vibrating element 31 (diaphragm 311 and sheet 312) is located within the first chamber 14. The first straight portion 313 of the diaphragm 311 is fixedly connected to the second surface 19 of the housing 13, and the first straight portion 313 surrounds the mounting groove 16 of the housing 13. The vibrating element 31 separates the mounting groove 16 and the second chamber 15, making the first chamber 14 and the mounting groove 16 a sealed chamber, and the second chamber 15 a chamber sealed and isolated from the sealed chamber. The concave portion of the arcuate portion 314 of the diaphragm 311 faces the sealed chamber.

[0069] The bracket 20 is located within the sealed cavity and is fixedly connected to the wall of the sealed cavity. Specifically, the first support surface 21 of the bracket 20 is bonded to the bottom wall of the sealed cavity. The magnetic module 40 is located within the sealed cavity and is fixedly connected to the bracket 20. Specifically, the side magnet 42 is fixedly connected to the bracket 20, and the center magnet 41 is fixedly connected to the bracket 20. The side magnetic top surface 424 of the side magnet 42 and the first magnetic surface 411 of the center magnet 41 are bonded to the second support surface 22 of the bracket 20.

[0070] In this embodiment, the edge washer 45 and the edge magnet 42 are stacked and fixed, and the first through hole 421 and the second through hole 451 are connected to form a through hole. The center magnet 41 and the center washer 44 are stacked and fixed, and the supplementary magnet 43 is fixed in the supplementary clearance hole 442 of the center washer 44. The center magnet 41, the center washer 44 and the supplementary magnet 43 are located in the through hole. There is a gap between the center magnet 41 and the center washer 44 and the hole wall of the through hole, which forms the aforementioned magnetic gap 401. A first magnetic field is formed between the edge magnet 42 and the center magnet 41 in the magnetic gap 401, and a second magnetic field is formed between the edge magnet 42 and the supplementary magnet 43 in the magnetic gap 401. The directions of the first magnetic field and the second magnetic field are the same.

[0071] The washer 45 and the magnet 42 are stacked and fixed, specifically, the third magnetic surface 454 of the washer 45 and the bottom magnetic surface 425 of the magnet 42 are bonded and fixed. The second magnetic inner surface 452 of the washer 45 is flush with the inner magnetic surface 422 of the magnet 42, and the second magnetic outer surface 453 of the washer 45 is flush with the outer magnetic surface 423 of the magnet 42.

[0072] The central magnet 41 and the central washer 44 are stacked and fixed, specifically, the first magnetically conductive surface 443 of the central washer 44 is bonded and fixed to the second magnetic surface 412 of the central magnet 41. The first magnetically conductive outer surface 446 of the central washer 44 is flush with the first magnetic peripheral surface 413 of the central magnet 41.

[0073] The central magnet 41, central washer 44, and supplementary magnet 43 are located within the through hole. Specifically, the central magnet 41 is located within the first through hole 421 of the side magnet 42, and the central washer 44 and supplementary magnet 43 are located within the second through hole 451 of the side washer 45. The thickness of the central magnet 41 along the Z-direction is the same as the thickness of the side magnet 42 along the Z-direction; this allows for machining errors. That is, the height of the first magnetic peripheral surface 413 of the central magnet 41 is the same as the height of the inner surface 422 of the side magnet 42, the first magnetic surface 411 of the central magnet 41 is flush with the top surface 424 of the side magnet 42, and the second magnetic surface 412 of the central magnet 41 is flush with the bottom surface 425 of the side magnet 42. The thickness of the central washer 44 along the Z-direction is the same as the thickness of the side washer 45 along the Z-direction; this also allows for machining errors. That is, the height of the first magnetic outer surface 446 of the center washer 44 is the same as the height of the second magnetic inner surface 452 of the side washer 45, the first magnetic surface 443 of the center washer 44 is flush with the third magnetic surface 454 of the side washer 45, and the second magnetic surface 444 of the center washer 44 is flush with the fourth magnetic surface 455 of the side washer 45.

[0074] In this embodiment, the supplementary magnet 43 is fixed within the supplementary clearance hole 442 of the central washer 44. Specifically, the third magnetic surface 431 of the supplementary magnet 43 is bonded and fixed to the second magnetic surface 412 of the central magnet 41; the second magnetic peripheral surface 433 of the supplementary magnet 43 is bonded and fixed to the first magnetically conductive inner surface 445 (the hole wall surface of the supplementary clearance hole 442) of the central washer 44; and the fourth magnetic surface 432 of the supplementary magnet 43 is flush with the second magnetically conductive surface 444 of the central washer 44. In other words, the supplementary magnet 43 completely fills the supplementary clearance hole 442, wherein the thickness of the supplementary magnet 43 along the Z direction is the same as the thickness of the central washer 44, allowing for machining errors. After the supplementary magnet 43 is fixed within the supplementary clearance hole 442, it is located at the center of the central washer 44. Therefore, the distance between the supplementary magnet 43 and the side magnet 42 is relatively uniform, resulting in a relatively uniform magnetic field between the side magnet 42 and the supplementary magnet 43. In other embodiments, the supplementary magnet 43 is located within the supplementary clearance hole 442, and the thickness of the supplementary magnet 43 along the Z direction is less than the thickness of the central washer 44.

[0075] There are gaps between the central magnet 41 and the central washer 44 and the wall of the through hole. Specifically, there is a first gap 401a between the first magnetic peripheral surface 413 of the central magnet 41 and the inner magnetic surface 422 of the side magnet 42, and a second gap 401b between the first magnetic outer surface 446 of the central washer 44 and the second magnetic inner surface 452 of the side washer 45. The first gap 401a and the second gap 401b are connected to form the aforementioned gap, which is the magnetic gap 401.

[0076] A first magnetic field is formed between the edge magnet 42 and the central magnet 41 within the magnetic gap 401. Specifically, the top surface 424 of the edge magnet 42 is the N pole, and the bottom surface 425 of the edge magnet 42 is the S pole. The first magnetic surface 411 of the central magnet 41 is the S pole, and the second magnetic surface 412 of the central magnet 41 is the N pole. Therefore, a complete magnetic circuit is formed between the top surface 424, the first magnetic surface 411, the bottom surface 425, and the second magnetic surface 412. Figure 14 (As shown by the dashed arrow in the middle), this magnetic circuit is the first magnetic field.

[0077] A second magnetic field is formed between the edge magnet 42 and the supplementary magnet 43 within the magnetic gap 401. Specifically, the top surface 424 of the edge magnet 42 is the N pole, and the bottom surface 425 of the edge magnet 42 is the S pole. The third magnetic surface 431 of the supplementary magnet 43 is the S pole, and the fourth magnetic surface 432 of the supplementary magnet 43 is the N pole. Therefore, a complete magnetic circuit is formed between the top surface 424, the third magnetic surface 431, the bottom surface 425, and the fourth magnetic surface 432. Figure 14 (As shown by the solid arrow in the diagram), this magnetic circuit is the second magnetic field.

[0078] In other embodiments, the top surface 424 of the side magnet 42 is the S pole, and the bottom surface 425 of the side magnet 42 is the N pole. The first magnetic surface 411 of the central magnet 41 is the N pole, and the second magnetic surface 412 of the central magnet 41 is the S pole. The third magnetic surface 431 of the supplementary magnet 43 is the N pole, and the fourth magnetic surface 432 of the supplementary magnet 43 is the S pole. At this time, a complete magnetic circuit is formed between the top surface 424, the first magnetic surface 411, the bottom surface 425, and the second magnetic surface 412, which is the first magnetic field. A complete magnetic circuit is also formed between the top surface 424, the third magnetic surface 431, the bottom surface 425, and the fourth magnetic surface 432, which is the second magnetic field.

[0079] The voice coil 32 is located within a sealed cavity, with at least a portion of it situated within a magnetic gap 401. Specifically, at least a portion of the inner ring surface 321 of the voice coil 32 faces a portion of the central magnetic circumferential surface of the central washer 44 and a portion of the first magnetic circumferential surface 413 of the central magnet 41, and a gap exists between the inner ring surface 321 of the voice coil 32 and the first magnetic outer surface 446 of the central washer 44. At least a portion of the outer ring surface 322 of the voice coil 32 faces a portion of the inner magnetic surface 422 of the side magnet 42 and the second magnetic inner surface 452 of the side washer 45. In other words, at least a portion of the central washer 44 and the central magnet 41 are located within the central control region of the voice coil 32.

[0080] After receiving the current signal, the voice coil 32 generates a Lorentz force in the Z direction within the magnetic gap 401 because the magnetic gap 401 contains a first magnetic field and a second magnetic field. The Lorentz force drives the voice coil 32 to move in the Z direction. The voice coil 32 drives at least a portion of the diaphragm 312 and the vibrating diaphragm 311 connected to the voice coil 32 to move in the Z direction. When the diaphragm 312 and the vibrating diaphragm 311 vibrate, they will push the air in the second chamber 15 to vibrate, thereby producing sound. The sound will be transmitted from the inner sound outlet 101 to the outer sound outlet 1101, and then from the outer sound outlet 1101 to the outside of the mobile phone.

[0081] The magnitude of the Lorentz force is affected by the magnetic field strength within the magnetic gap 401. Specifically, the Lorentz force F = BL*i, where B is the magnetic induction intensity, L is the effective line length of the voice coil 32, and i is the current in the voice coil 32. With L and i remaining constant, the larger B is, the larger F is. In this embodiment, the supplementary magnet 43, in conjunction with the side magnet 42, generates a second magnetic field within the magnetic gap 401. This second magnetic field supplements the first magnetic field, significantly increasing the magnetic induction intensity B, and consequently, significantly increasing the Lorentz force F. With the increased Lorentz force, the voice coil 32 moves more, leading to increased movement of the diaphragm 311 and the sheet 312. This enhances the air vibration within the second chamber 15, increasing the loudness of the sound emitted from the inner sound outlet 101 and improving sensitivity. Gaussmeter measurements show that, compared to the embodiment without the supplementary magnet 43, the configuration with the supplementary magnet 43 increases the magnetic field strength by 28%-34%.

[0082] In this embodiment, in the Z-direction, at least a portion of the magnetic component 40a of the magnetic module 40 is inserted into the washer 40b of the magnetic module 40, more specifically, the supplementary magnet 43 is fixed within the supplementary clearance hole 441 of the central washer 44. Normally, the magnetic conduction effect of the central washer 44 is on its peripheral area, while the central area surrounded by the peripheral area is considered an ineffective area. Therefore, the supplementary clearance hole 441 is provided in the ineffective area of ​​the central washer 44 to fully utilize the ineffective area in the center of the central washer 44. This results in a stronger magnetic field generated by the magnetic component 40a; a stronger magnetic field leads to better performance of the speaker 100. Furthermore, the supplementary magnet 43 is fixed inside the central washer 44 without occupying additional Z-direction space. This enhances the performance of the speaker 100 while maintaining a relatively small thickness.

[0083] The above are merely some embodiments and implementation methods of this application. 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, characterized in that, include: The mounting housing comprises a bracket, a vibrating element, a voice coil, a magnetic element, and a washer; the mounting housing has a sound chamber, and the bracket, vibrating element, voice coil, magnetic element, and washer are all installed in the sound chamber along the thickness direction of the loudspeaker; the vibrating element is fixedly connected to the mounting housing, and the voice coil is fixedly connected to the vibrating element; The bracket is fixedly connected to the mounting housing, the magnetic component is fixedly connected to the bracket, and the washer is connected to the magnetic component; at least a portion of the magnetic component is inserted into the washer, the magnetic component has a magnetic gap, at least a portion of the voice coil is located within the magnetic gap, the magnetic component includes a center magnet, a side magnet, and a supplementary magnet, and the washer includes a center washer and a side washer; both the center magnet and the side magnet are fixedly connected to the bracket, the side magnet surrounds the center magnet, and the supplementary magnet is located on the side of the center magnet away from the bracket; a first gap exists between the side magnet and the center magnet. The center washer is fixed to the side of the center magnet away from the support, and the side washer is fixed to the side of the side magnet away from the support; the side washer surrounds the center washer, and there is a second gap between the side washer and the center washer; the first gap and the second gap communicate to form the magnetic gap; the supplementary magnet is at least partially inserted into the center washer; the center washer includes a washer body and a supplementary clearance hole; the supplementary clearance hole is opened in the washer body; the supplementary clearance hole is a blind hole; the supplementary magnet is fixed in the supplementary clearance hole and contacts the hole wall of the supplementary clearance hole; The side magnet and the center magnet create a first magnetic field within the magnetic gap, and the side magnet and the supplementary magnet create a second magnetic field within the magnetic gap; at least a portion of the voice coil is located within the first magnetic field and the second magnetic field; The central magnet includes a first magnetic surface and a second magnetic surface opposite to each other along the thickness direction of the speaker; the side magnet includes a top side magnetic surface and a bottom side magnetic surface opposite to each other along the thickness direction of the speaker; the supplementary magnet includes a third magnetic surface and a fourth magnetic surface opposite to each other along the thickness direction of the speaker; the first magnetic surface and the top side magnetic surface are oriented in the same direction, and the second magnetic surface and the bottom side magnetic surface are oriented in the same direction; the second magnetic surface and the third magnetic surface are stacked and fixed, and the second magnetic surface and the third magnetic surface are attracted to each other; The magnetic loop of the first magnetic field passes through the top surface of the side magnetic field, the first magnetic surface, the bottom surface of the side magnetic field, and the second magnetic surface; the magnetic loop of the second magnetic field passes through the top surface of the side magnetic field, the third magnetic surface, the bottom surface of the side magnetic field, and the fourth magnetic surface.

2. The loudspeaker according to claim 1, characterized in that, The thickness of the supplementary magnet is less than or equal to the thickness of the washer body.

3. The loudspeaker according to claim 1, characterized in that, The washer body includes a first magnetically conductive surface and a second magnetically conductive surface that are opposite to each other along the thickness direction of the speaker; the supplementary clearance hole penetrates through the first magnetically conductive surface; the supplementary magnet includes a third magnetic surface and a fourth magnetic surface that are opposite to each other along the thickness direction of the speaker; the fourth magnetic surface contacts the bottom surface of the supplementary clearance hole, and the third magnetic surface is flush with the first magnetically conductive surface.

4. The loudspeaker according to claim 1, characterized in that, The supplementary magnet is located in the central region of the central washer.

5. The loudspeaker according to any one of claims 1 to 4, characterized in that, The vibrating element includes a diaphragm and a sheet. The diaphragm has a hollowed-out area in the middle, and the edge of the diaphragm is fixedly connected to the mounting housing. The sheet is located within the hollowed-out area and is fixedly connected to the diaphragm. The diaphragm and the sheet divide the sound chamber into a sealed chamber and a sound outlet chamber. The bottom surface of the sealed chamber is opposite to the diaphragm and the sheet. The mounting housing has an internal sound outlet hole communicating with the sound outlet chamber. The voice coil is fixedly connected to the diaphragm; the support, the voice coil, the magnetic element, and the washer are located within the sealed cavity; the support is fixedly connected to the bottom surface of the sealed cavity; the central magnet and the central washer are sequentially stacked on the side of the support facing away from the bottom surface of the sealed cavity; the side magnet and the side washer are sequentially stacked on the side of the support facing away from the bottom surface of the sealed cavity; the voice coil at least partially surrounds the central magnet, the central washer, and the supplementary magnet, so that the voice coil is located within the magnetic gap.

6. The loudspeaker according to claim 5, characterized in that, The side magnet has a first through hole that extends through the side magnet along the thickness direction of the speaker; the side washer has a second through hole that extends through the side washer along the thickness direction of the speaker; the first through hole and the second through hole are connected to form a through hole, and the center washer, the center magnet and the supplementary magnet are all located in the through hole.

7. The loudspeaker according to claim 6, characterized in that, The edge magnet includes an inner edge magnet surface and an outer edge magnet surface. The inner edge magnet surface is the wall surface of the first through hole, and the outer edge magnet surface is opposite to the first through hole. The edge washer includes a second magnetic inner surface and a second magnetic outer surface. The second magnetic inner surface is the wall surface of the second through hole, and the second magnetic outer surface is opposite to the second through hole. In the thickness direction of the speaker, the inner edge magnet surface is flush with the second magnetic inner surface, and the outer edge magnet surface is flush with the second magnetic outer surface.

8. The loudspeaker according to claim 6, characterized in that, The central magnet includes a first magnetic circumferential surface surrounding an axis in the thickness direction of the speaker, and the central washer includes a first magnetically conductive outer surface in the thickness direction of the speaker, wherein the first magnetic circumferential surface and the first magnetically conductive outer surface are flush in the thickness direction of the speaker.

9. An electronic device, characterized in that, It includes a housing, a motherboard, and a speaker as described in any one of claims 1 to 8; the speaker and the motherboard are mounted in the housing, and the motherboard is electrically connected to the voice coil.

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